JP7472464B2 - Power storage device - Google Patents

Description

The present invention relates to an energy storage device that includes an energy storage element and a substrate.

Conventionally, power storage devices that include a power storage element and a substrate are widely known. For example, Patent Document 1 discloses a battery unit (power storage device) that includes a battery stack composed of multiple battery cells (power storage elements), a cover member fixed to the battery stack, and a substrate that is electrically connected to each terminal of the multiple battery cells, with the substrate being fixed to the cover member.

JP 2015-179643 A

In an electricity storage device that includes a board, it is desirable to have a configuration that allows the board to be easily attached and detached when performing work such as installation, maintenance, or replacement of the board. However, in the above-mentioned conventional electricity storage device, the board is fixed to the cover member by screws (see Figures 3 to 5 of Patent Document 1, etc.), so the board cannot be attached or detached until the screws are attached or detached. Thus, the inventor of the present application has discovered that the above-mentioned conventional electricity storage device has a problem in that the board cannot be easily attached or detached.

The present invention was made in consideration of the above problems, and aims to provide an electricity storage device in which the substrate can be easily attached and detached.

To achieve the above object, an energy storage device according to one aspect of the present invention comprises an energy storage element, a substrate electrically connected to the energy storage element, and a substrate holding portion that holds the substrate, the substrate holding portion having a fixing portion that fixes the substrate in a press-fit state.

According to this, in the energy storage device, the substrate holding portion that holds the substrate has a fixing portion that fixes the substrate in a press-fit state. In this way, by fixing the substrate to the substrate holding portion by press-fitting, there is no need to perform tasks such as attaching and removing screws, and the substrate can be easily attached and detached from the substrate holding portion.

In addition, a through hole may be formed in the substrate, and the fixing portion may be a protrusion that protrudes from the surface of the substrate holding portion facing the substrate and becomes thinner toward the tip, and when inserted and pressed into the through hole, the substrate may be fixed at a position spaced from the facing surface.

According to this, the fixing portion of the board holding portion is a protrusion that becomes thinner toward the tip, and when pressed into the through hole of the board, the board is fixed at a position separated from the opposing surface of the board holding portion. In this way, by providing a tapered protrusion on the board holding portion and pressing the protrusion into the through hole of the board, the board can be easily attached and detached from the board holding portion with a simple configuration. Furthermore, by fixing the board at a position separated from the opposing surface of the board holding portion, components can also be placed on the back side of the board (the surface on the opposing surface side).

The fixing portion may also fix the substrate in a position in which the plate surface of the substrate faces in a direction intersecting the vertical direction.

When the board surface is facing in a direction intersecting the vertical direction, it is difficult to attach and detach the board from the board holding part if the board is fixed with screws or the like. For this reason, by fixing the board to the board holding part by pressing it into the fixing part, the board can be easily attached and detached from the board holding part with a simple configuration.

The device may further include a cover portion attached to the substrate holding portion, the cover portion having a restricting portion that restricts movement of the substrate in a direction toward the cover portion.

The board is fixed to the fixing part of the board holding part by press fitting, not by screw fastening, so there is a risk of it coming loose from the fixing part. For this reason, a restricting part is provided on the cover part attached to the board holding part to restrict the movement of the board towards the cover part. This makes it possible to prevent the board, which is fixed to the fixing part of the board holding part by press fitting, from coming loose from the fixing part.

The cover portion may also be attached to the substrate holder portion so that it can rotate.

With this, since the cover part is rotatably attached to the substrate holding part, the cover part can be easily opened and closed relative to the substrate holding part by rotating the cover part relative to the substrate holding part. As a result, even when the cover part is attached to the substrate holding part, the substrate can be easily attached and detached to and from the substrate holding part.

The board may also have a connector at an end on a side different from the side on which the axis about which the cover portion rotates relative to the board holder is located.

With this, the connector of the board is located at the end on a side different from the side on which the axis about which the cover rotates relative to the board holding part is located, so that the connector or the cable connected to the connector is prevented from getting in the way when the cover is rotated. This makes it possible to easily rotate the cover, for example by rotating the cover with the cable attached to the connector, and therefore makes it easy to attach and detach the board to and from the board holding part.

The present invention can be realized not only as an electricity storage device, but also as a substrate holder having a fixing portion, or the substrate holder and a substrate.

The power storage device of the present invention allows the substrate to be easily attached and detached.

1 is a perspective view showing an external appearance of a power storage device according to an embodiment; 1 is a perspective view showing a configuration of an electricity storage device according to an embodiment when separated into an electricity storage unit and a substrate unit. FIG. FIG. 2 is an exploded perspective view illustrating components of the electricity storage unit according to the embodiment. FIG. 2 is an exploded perspective view showing each component when the board unit according to the embodiment is disassembled. 1A to 1C are a perspective view, a cross-sectional view, and a side view showing a configuration of a board unit according to an embodiment. 2 is a cross-sectional view showing a configuration of a substrate unit according to the embodiment. FIG. 1A to 1C are a perspective view, a front view, and a side view showing a configuration of a board unit in an embodiment with a cover portion open. 11A and 11B are perspective and cross-sectional views showing a configuration in a state in which a board holding portion is rotated relative to a board unit mounting portion of an exterior body support body in an embodiment. 1 is a perspective view showing a configuration in which a cable is arranged in a cable arrangement portion of a board unit according to an embodiment; FIG. 2 is a front view showing a cable connection configuration of the power storage device according to the embodiment.

The following describes an energy storage device according to an embodiment of the present invention (including its modified examples) with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component placement positions, and connection forms shown in the following embodiments are merely examples and are not intended to limit the present invention. Also, the dimensions and other details shown in each figure are not strictly shown.

In the following description and drawings, the X-axis direction is defined as the direction in which a pair of electrode terminals (positive and negative) in one storage element are aligned, the direction in which the short sides of the storage element's container face each other, or the direction in which the long sides of the storage unit's exterior body face each other. The Y-axis direction is defined as the direction in which the storage elements are aligned, the direction in which the long sides of the storage element's container face each other, the direction in which the short sides of the storage unit's exterior body face each other, the direction in which the storage unit and the board unit face each other, or the direction in which the board holder, board, and cover of the board unit face each other. The Z-axis direction is defined as the direction in which the storage unit's exterior body support and exterior body lid are aligned, the direction in which the storage element and the bus bar are aligned, the direction in which the storage element's container body and lid are aligned, or the up-down direction. The X-axis direction, Y-axis direction, and Z-axis direction are mutually intersecting (orthogonal in this embodiment). Note that, depending on the mode of use, the Z-axis direction may not be the up-down direction, but for convenience of explanation, the Z-axis direction is described below as the up-down direction.

In the following description, for example, the positive X-axis direction refers to the direction of the X-axis arrow, and the negative X-axis direction refers to the opposite direction to the positive X-axis direction. The same applies to the Y-axis and Z-axis directions. In the following, the negative Y-axis direction may also be called the first direction, and the negative Z-axis direction or the positive Z-axis direction may also be called the second direction. Furthermore, expressions indicating relative directions or attitudes, such as parallel and orthogonal, may also include cases where the directions or attitudes are not strictly those. For example, saying that two directions are orthogonal does not only mean that the two directions are completely orthogonal, but also means that the directions are substantially orthogonal, that is, there is a difference of, for example, about a few percent.

(Embodiment)
[1 General Description of Energy Storage Device 1]
First, the configuration of the energy storage device 1 according to the present embodiment will be described. Fig. 1 is a perspective view showing the external appearance of the energy storage device 1 according to the present embodiment. Fig. 2 is a perspective view showing the configuration of the energy storage device 1 according to the present embodiment when separated into an energy storage unit 10 and a substrate unit 20. Fig. 3 is an exploded perspective view showing each component when the energy storage unit 10 according to the present embodiment is disassembled.

The power storage device 1 is a device that can charge electricity from an external source and discharge electricity to the outside, and in this embodiment, has a substantially rectangular parallelepiped shape. For example, the power storage device 1 is used for power storage or power supply. Specifically, the power storage device 1 is used as a battery for driving or starting the engine of a moving body such as an automobile, a motorcycle, a watercraft, a ship, a snowmobile, an agricultural machine, a construction machine, or a railway vehicle for an electric railway. Examples of the above-mentioned automobiles include electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and gasoline-powered automobiles. Examples of the above-mentioned railway vehicles for an electric railway include trains, monorails, and linear motor cars. The power storage device 1 can also be used as a stationary battery for home use or for power generation.

As shown in these figures, the energy storage device 1 includes an energy storage unit 10 and a board unit 20 attached to the energy storage unit 10. First, the configuration of the energy storage unit 10 will be described in detail. The energy storage unit 10 is a battery module (battery assembly) having a generally rectangular parallelepiped shape that is elongated in the Y-axis direction. Specifically, the energy storage unit 10 includes a plurality of energy storage elements 11, a bus bar frame 12, a plurality of bus bars 13, and an exterior body 18 that includes an exterior body main body 14, an exterior body support body 15, and an exterior body cover body 17 that accommodates these. A cable 30 is connected to the energy storage unit 10. The energy storage unit 10 may include restraining members (end plates, side plates, etc.) that restrain the plurality of energy storage elements 11.

The storage element 11 is a secondary battery (single cell) that can charge and discharge electricity, and more specifically, is a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. The storage element 11 has a flat rectangular parallelepiped shape (square shape), and in this embodiment, 16 storage elements 11 are arranged in the Y-axis direction. The shape, arrangement position, number, etc. of the storage elements 11 are not particularly limited. The storage element 11 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery, or may be a capacitor. The storage element 11 may not be a secondary battery, but may be a primary battery that can use stored electricity without the user having to charge it. Furthermore, the storage element 11 may be a battery using a solid electrolyte. The storage element 11 may also be a laminated storage element.

Specifically, the energy storage element 11 includes a metal container 11a, and the lid of the container 11a is provided with a positive electrode terminal 11b and a negative electrode terminal 11c, which are metal electrode terminals. A spacer 11d is disposed between adjacent energy storage elements 11. The lid of the container 11a may be provided with a liquid injection section for injecting an electrolyte solution, and a gas exhaust valve for releasing pressure by discharging gas when the pressure inside the container 11a increases. Inside the container 11a, electrodes (also called an electricity storage element or a power generation element) and current collectors (positive and negative electrode current collectors) are disposed, and an electrolyte solution (non-aqueous electrolyte) is enclosed, but a detailed description is omitted.

Here, the positive terminal 11b and the negative terminal 11c are arranged to protrude upward (in the positive direction of the Z axis) from the lid of the container 11a. The outermost positive terminal 11b and the negative terminal 11c of the multiple storage elements 11 are connected to the cable 30, so that the storage device 1 can charge electricity from the outside and discharge electricity to the outside. The cable 30 is an electric wire (also called a main circuit cable, power cable, power cable, power line, or power line) through which a current (also called a charge/discharge current or main current) for charging and discharging the storage device 1 (storage elements 11) flows, and has a positive power cable 31 on the positive side and a negative power cable 32 on the negative side. In other words, the positive power cable 31 of the cable 30 is connected to the positive terminal 11b of the storage element 11 at the end in the positive direction of the Y axis among the multiple storage elements 11, and the negative power cable 32 of the cable 30 is connected to the negative terminal 11c of the storage element 11 at the end in the negative direction of the Y axis.

The busbar frame 12 is a flat rectangular member that can electrically insulate the busbar 13 from other members and can regulate the position of the busbar 13. The busbar frame 12 is formed of an insulating material similar to the materials listed in the board housing portion 100 of the board unit 20 described later, such as polycarbonate (PC), polypropylene (PP), and polyethylene (PE). Specifically, the busbar frame 12 is placed above the multiple energy storage elements 11 and positioned relative to the multiple energy storage elements 11. In addition, the busbar 13 is placed and positioned on the busbar frame 12. As a result, the busbar 13 is positioned relative to the multiple energy storage elements 11 and joined to the positive terminal 11b and the negative terminal 11c of the multiple energy storage elements 11. The busbar frame 12 also has a function of reinforcing the exterior body main body 14 as an inner lid of the exterior body 18.

The bus bar 13 is a rectangular plate-like member that is disposed on the multiple energy storage elements 11 (on the bus bar frame 12) and electrically connects the electrode terminals of the multiple energy storage elements 11. The bus bar 13 is formed of a metal such as aluminum, an aluminum alloy, copper, a copper alloy, or stainless steel. In this embodiment, the bus bar 13 connects the positive electrode terminals 11b and the negative electrode terminals 11c of adjacent energy storage elements 11, thereby connecting the 16 energy storage elements 11 in series. Note that the manner in which the energy storage elements 11 are connected is not limited to the above, and any combination of series and parallel connections may be used.

A cable 13a is connected to the bus bar 13 or the electrode terminal of the storage element 11. The cable 13a is an electric wire (also called a communication cable, control cable, communication line, or control line) for measuring the voltage or temperature of the storage element 11, or for balancing the voltage between the storage elements 11. A thermistor (not shown) for measuring the temperature of the storage element 11 is disposed on the bus bar 13 or the electrode terminal of the storage element 11, but the description is omitted. A connector 13b is connected to the end of the cable 13a in the negative Y-axis direction. The connector 13b is a connector that is connected to the board 200 of the board unit 20, which will be described later. That is, the cable 13a transmits information such as the voltage and temperature of the storage element 11 to the board 200 of the board unit 20 via the connector 13b. The cable 13a also has the function of discharging the storage element 11 with a high voltage by controlling the board 200, thereby balancing the voltage between the storage elements 11.

The exterior body 18 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the energy storage unit 10. In other words, the exterior body 18 is disposed outside the energy storage elements 11, etc., and fixes the energy storage elements 11, etc. in a predetermined position to protect them from impacts, etc. Here, the exterior body 18 has an exterior body main body 14 that constitutes the main body of the exterior body 18, an exterior body support 15 that supports the exterior body main body 14, and an exterior body lid 17 that constitutes the lid (outer lid) of the exterior body 18.

The exterior body 14 is a bottomed rectangular cylindrical housing with an opening formed on the top surface. The exterior body 14 is formed of an insulating material similar to the materials listed for the board housing section 100 of the board unit 20 described later, such as PC, PP, or PE. The exterior body support 15 and the exterior body lid 17 are members that protect (reinforce) the exterior body 14. The exterior body support 15 and the exterior body lid 17 are formed of metal members such as stainless steel, aluminum, aluminum alloy, iron, and plated steel sheet. The exterior body support 15 and the exterior body lid 17 may be formed of members of the same material or different materials.

The exterior body support 15 is a member that supports the exterior body main body 14 from below (Z-axis negative direction) and has a bottom 15a, a board unit mounting part 16, and connection parts 15b and 15c. The bottom 15a is a flat and rectangular part that is parallel to the XY plane and extends in the Y-axis direction, constituting the bottom of the storage device 1, and is arranged below the exterior body main body 14. The board unit mounting part 16 is a flat and rectangular part that stands in the Z-axis positive direction from the end of the bottom 15a on the Y-axis negative side, and the board unit 20 is attached to it. The connection part 15b is arranged at the end of the board unit mounting part 16 on the Z-axis positive side, is a part that protrudes in the Y-axis negative direction, and is connected to the exterior body cover 17. The connection part 15c is a part that stands in the Z-axis positive direction from the end of the bottom 15a on the Y-axis positive side, protrudes in the Y-axis positive direction, and is connected to the exterior body cover 17.

The exterior body cover 17 is a member arranged to cover the opening on the top surface of the exterior body main body 14, and has a top surface portion 17a and connection portions 17b and 17c. The top surface portion 17a is a flat, rectangular portion that is parallel to the XY plane and extends in the Y-axis direction, constituting the top surface portion of the storage device 1, and is arranged above the exterior body main body 14. The connection portion 17b is arranged at the end of the top surface portion 17a on the negative Y-axis side, extends in the negative Z-axis direction, and protrudes in the negative Y-axis direction, and is connected to the connection portion 15b of the exterior body support body 15. The connection portion 17c is a portion that extends in the negative Z-axis direction from the end of the top surface portion 17a on the positive Y-axis side, protrudes in the positive Y-axis direction, and is connected to the connection portion 15c of the exterior body support body 15. In this way, the exterior body support 15 and the exterior body lid 17 are configured to sandwich the exterior body main body 14 from above and below, and are fixed by connecting the connection parts 15b and 15c to the connection parts 17b and 17c with screws or the like.

The board unit 20 is a device capable of monitoring the state of the energy storage element 11 of the energy storage unit 10 and controlling the energy storage element 11. In this embodiment, the board unit 20 is a flat rectangular member attached to the longitudinal end of the energy storage unit 10, i.e., the side surface of the energy storage unit 10 on the negative Y-axis side. Specifically, the board unit 20 is rotatably attached to the board unit attachment portion 16 provided on the exterior body support 15 of the exterior body 18 of the energy storage unit 10. The configuration of this board unit 20 will be described in detail below.

[2. Description of the Configuration of Board Unit 20]
FIG. 4 is an exploded perspective view showing each component when the board unit 20 according to the present embodiment is disassembled. FIG. 5 is a perspective view, a cross-sectional view, and a side view showing the configuration of the board unit 20 according to the present embodiment. Specifically, FIG. 5(a) is a perspective view showing the configuration of the board unit 20 shown in FIG. 2 in a state where it is attached to the board unit attachment portion 16 of the exterior body support 15. FIG. 5(b) is a cross-sectional view showing the attachment configuration between the board unit attachment portion 16 and the board holding portion 110. FIG. 5(c) is a side view showing the attachment configuration between the board holding portion 110 and the cover portion 120. FIG. 6 is a cross-sectional view showing the configuration of the board unit 20 according to the present embodiment. Specifically, FIG. 6 is a cross-sectional view showing the configuration when the board unit 20 of FIG. 5(a) is cut at the VI-VI cross section.

Figure 7 is a perspective view, a front view, and a side view showing the configuration of the substrate unit 20 according to this embodiment with the cover portion 120 in an open state. Specifically, (a) of Figure 7 is a perspective view showing the configuration of the substrate unit 20 shown in Figure 5 with the cover portion 120 rotated relative to the substrate holding portion 110. (b) of Figure 7 is a partial front view showing the configuration of the through hole 230 of the substrate 200 and the fixing portion 116 of the substrate holding portion 110 as viewed from the negative Y-axis direction. (c) of Figure 7 is a partial side view showing the mounting configuration of the substrate holding portion 110 and the cover portion 120, and corresponds to (c) of Figure 5.

Figure 8 is a perspective view and a cross-sectional view showing the configuration in a state where the board holding part 110 has been rotated relative to the board unit mounting part 16 of the exterior body support 15 according to this embodiment. Specifically, (a) of Figure 8 is a perspective view showing the configuration in a state where the board holding part 110 has been rotated relative to the board unit mounting part 16 until it can be rotated (until the rotation of the board holding part 110 is restricted). (b) of Figure 8 is a cross-sectional view showing the mounting configuration between the board unit mounting part 16 and the board holding part 110, and corresponds to (b) of Figure 5.

As shown in these figures, the substrate unit 20 has a substrate accommodating section 100 and a substrate 200 accommodated in the substrate accommodating section 100. In other words, the substrate accommodating section 100 accommodates the substrate 200 and fixes it at a predetermined position to protect the substrate 200 from impacts and the like. The substrate accommodating section 100 is formed of an insulating material such as polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), tetrafluoroethylene perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyether sulfone (PES), ABS resin, or a composite material thereof, or a metal with an insulating coating. The substrate accommodating section 100 thereby prevents the substrate 200 from coming into contact with external metal members and the like. In addition, the substrate accommodating section 100 may be made of a conductive material such as metal as long as the electrical insulation of the substrate 200 is maintained.

The board accommodating section 100 is rotatably attached to the side (board unit mounting section 16 of the board support 15) of the exterior body 18 of the energy storage unit 10 in the horizontal direction (specifically, the negative Y-axis direction (first direction)) in an upright position. The board accommodating section 100 has a board holding section 110 that holds the board 200, and a cover section 120 that is attached to the board holding section 110. In other words, the board 200 and the board accommodating section 100 (board holding section 110 and cover section 120) are arranged in the negative Y-axis direction (first direction) of the energy storage unit 10 in an upright position. The configurations of the board 200 and the board holding section 110 and cover section 120 of the board accommodating section 100 will be described in detail below.

[2.1 Description of the substrate 200]
The board 200 is a circuit board (monitoring board) electrically connected to the energy storage unit 10. Specifically, the board 200 is electrically connected to the energy storage element 11 via the above-mentioned cable 13a and connector 13b, thereby acquiring information such as the voltage and temperature of the energy storage element 11 and monitoring the state of the energy storage element 11 such as the charging state and discharging state. The board 200 also functions as a control board that discharges the energy storage element 11 using the cable 13a to balance the voltage between the energy storage elements 11. Components (not shown) are mounted on both the plate surface on the Y-axis positive side and the plate surface on the Y-axis negative side of the board 200. Note that the board 200 may not control the energy storage element 11 and may only monitor the state of the energy storage element 11.

More specifically, the board 200 has connectors 210 and 220 and a through hole 230. The connectors 210 and 220 are arranged at the end of the outer periphery of the board 200 on the side different from the negative Z-axis side (the side on which the axis about which the cover part 120 described later rotates relative to the board holding part 110 is located). In this embodiment, two connectors 210 are arranged side by side in the X-axis direction on both sides of the end of the board 200 on the positive Z-axis side, and two connectors 220 are arranged side by side in the Z-axis direction on the negative Z-axis side of the end of the board 200 on the negative X-axis side.

The connector 210 is arranged on the surface of the board 200 on the negative Y-axis side with its socket facing the positive Z-axis direction (parallel to the surface of the board 200), and the connector 13b described above can be attached and detached to the socket (see FIG. 7A). The connector 220 is arranged on the surface of the board 200 on the negative Y-axis side with its socket facing the negative Y-axis direction, and an external connector (not shown) can be attached and detached to the socket through the opening 124 of the cover 120 (see FIG. 5A and FIG. 7A). The opening 124 is a rectangular through hole formed at a position corresponding to the connector 220 on the negative Z-axis side of the end of the cover 120 on the negative X-axis direction side.

The through holes 230 are rectangular through holes that penetrate the substrate 200 in the Y-axis direction. In this embodiment, a plurality (six) of through holes 230 are arranged on the outer periphery of the substrate 200. That is, three through holes 230 are arranged in the X-axis direction at the end of the substrate 200 on the positive side of the Z-axis, and three through holes 230 are arranged in the X-axis direction at the end of the substrate 200 on the negative side of the Z-axis. Specifically, as shown in FIG. 7B, the through holes 230 are formed so that their length is longer in the X-axis direction than in the Z-axis direction, and the fixing portion 116 of the substrate holding portion 110 is inserted (pressed in). A detailed description of the configuration in which the fixing portion 116 is inserted (pressed in) into the through holes 230 will be described later.

[2.2 Description of the substrate holding portion 110 and the cover portion 120]
The board holding part 110 is a member disposed between the energy storage unit 10 and the board 200, and holds the board 200. As described above, the board holding part 110 is rotatably attached to the board unit attachment part 16 of the exterior body support 15 of the energy storage unit 10 in an upright position. The board holding part 110 has a holding part main body 111, a gripping part 115 having a first board side attachment part 112, a first holding part side attachment part 113, an upper attachment part 114, and a fixing part 116.

The cover part 120 is disposed in the negative Y-axis direction (first direction) of the board 200, is a member that closes the opening of the board holding part 110, and is attached to the board holding part 110 so as to be freely opened and closed. Specifically, the cover part 120 is attached to the board holding part 110 so as to be rotatable. In addition to the opening 124 described above, the cover part 120 has a cover part main body 121, a first cover side mounting part 122, a second cover side mounting part 123, a cable arrangement part 125, and a board regulating part 126 (see Figures 6, 7, etc.).

[2.2.1 Description of the holding unit body 111 and the cover unit body 121]
The holding section main body 111 is a part that constitutes the main body of the substrate holding section 110, and has a first holding section wall 111a and a second holding section wall 111b. The first holding section wall 111a is a flat, rectangular section that is arranged between the substrate unit mounting section 16 and the substrate 200 and is parallel to the XZ plane. The second holding section wall 111b is a flat, rectangular section that protrudes from the outer periphery of the first holding section wall 111a in the negative Y-axis direction and surrounds the periphery of the substrate 200. In this embodiment, the second holding section wall 111b is arranged so as to surround both sides in the X-axis direction, the negative Z-axis direction side, and a part of the positive Z-axis direction side of the substrate 200.

The cover body 121 is a part that constitutes the body of the cover body 120, and has a first cover wall 121a and a second cover wall 121b. The first cover wall 121a is a flat, rectangular part parallel to the XZ plane, arranged at a position where the substrate 200 is sandwiched between the first holding wall 111a of the holding body 111. The second cover wall 121b is a flat, approximately rectangular part that protrudes from the outer periphery of the first cover wall 121a in the positive Y-axis direction and surrounds the periphery of the substrate 200 and the periphery of the second holding wall 111b. In this embodiment, the second cover wall 121b is arranged so as to surround both sides in the X-axis direction and the positive Z-axis direction of the substrate 200 and the second holding wall 111b.

[2.2.2 Description of first board side mounting portion 112]
The first board-side mounting portion 112 is disposed on the bottom 15a side (negative Z-axis direction side) of the power storage device 1 in the board holding portion 110, and is attached rotatably to the power storage unit 10. Specifically, the two first board-side mounting portions 112 are disposed on the negative Z-axis direction side and both ends in the X-axis direction of the board holding portion 110. Furthermore, the board unit mounting portion 16 of the power storage unit 10 has a first power storage side mounting portion 16a to which the first board-side mounting portion 112 is attached. In other words, the two first power storage side mounting portions 16a are disposed at positions corresponding to the two first board-side mounting portions 112 on the negative Z-axis direction side and both ends in the X-axis direction of the board unit mounting portion 16.

5(a) and (b), the first board side mounting portion 112 is a columnar shaft extending in the X-axis direction, with a circular or cross-shaped (+-shaped, X-shaped) cross section when cut in the YZ plane. The first power storage side mounting portion 16a is a portion that extends in the Z-axis positive direction from the end of the bottom portion 15a of the exterior body support 15 on the Y-axis negative side, is bent in the Y-axis negative direction, and is also bent in the Z-axis negative direction. In other words, the first power storage side mounting portion 16a has a shape in which the surface on the Z-axis positive side protrudes in the Z-axis positive direction, and the surface on the Z-axis negative side is recessed in the Z-axis positive direction. In other words, the first power storage side mounting portion 16a has an inverted U-shape when viewed from the X-axis direction, with the portion on the Z-axis negative side open and recessed in the Z-axis positive direction.

The first board-side mounting portion 112 is inserted into the recessed portion of the first power storage side mounting portion 16a. In other words, the first power storage side mounting portion 16a is arranged on both sides in the Y-axis direction and on the positive Z-axis side of the first board-side mounting portion 112 so as to surround both sides in the Y-axis direction and on the positive Z-axis side of the first board-side mounting portion 112. As a result, the first board-side mounting portion 112 is arranged closer to the bottom 15a of the energy storage device 1 (the negative Z-axis side) than the first power storage side mounting portion 16a.

8, the first board side mounting portion 112 is configured to be rotatable (rotatable) relative to the first power storage side mounting portion 16a. In other words, when the first board side mounting portion 112 rotates (turns) relative to the first power storage side mounting portion 16a, the board holding portion 110 rotates (rotates) relative to the board unit mounting portion 16 around the first board side mounting portion 112 as an axis. In addition, when the inclined surface 115a of the gripping portion 115 described later abuts against a wall portion 16b provided at the bottom of the board unit mounting portion 16, the rotation of the board holding portion 110 relative to the board unit mounting portion 16 is restricted with the board holding portion 110 inclined relative to the board unit mounting portion 16. The wall portion 16b is a flat, rectangular portion that extends in the negative Z-axis direction from between the two first storage side mounting portions 16a at the end of the bottom portion 15a of the exterior body support 15 on the negative Y-axis direction side, and is used to mount the storage device 1 to a shelf 2 (see FIG. 10) of a rack (a member that houses multiple storage devices 1) or the like.

As a result, the rotation of the board holding part 110 is restricted in a state where it is rotated approximately 45° relative to the board unit mounting part 16, and in this state, the board holding part 110 can be removed from the board unit mounting part 16. Specifically, while rotating the board holding part 110 relative to the board unit mounting part 16, the second board side mounting part 114a of the upper mounting part 114 described below is removed from the second power storage side mounting part 16c of the board unit mounting part 16 described below. Then, after rotating the board holding part 110 approximately 45° relative to the board unit mounting part 16, the board holding part 110 can be removed from the board unit mounting part 16 by moving the board holding part 110 in the negative Z-axis direction.

When mounting the board holding part 110 to the board unit mounting part 16, the first board side mounting part 112 is inserted into the first power storage side mounting part 16a from the negative Z-axis direction with the board holding part 110 tilted at about 45° with respect to the board unit mounting part 16. Then, the board holding part 110 is rotated so as to approach the board unit mounting part 16, and the second board side mounting part 114a of the upper mounting part 114 is mounted to the second power storage side mounting part 16c of the board unit mounting part 16. In this manner, the board holding part 110 can be attached to and detached from the power storage unit 10 (attaching and detaching the board unit 20). Note that the angle at which the board holding part 110 is restricted to the board unit mounting part 16 is not limited to 45° and may be any angle as long as the board holding part 110 can be attached to and detached from the board unit mounting part 16.

[2.2.3 Description of the first holder side attachment portion 113 and the first cover side attachment portion 122]
The first holding part side attachment part 113 is disposed on the bottom 15a side (negative Z-axis direction side) of the energy storage device 1 in the substrate holding part 110, and is a portion to which the cover part 120 is attached. Specifically, the two first holding part side attachment parts 113 are disposed on the negative Z-axis direction side of the substrate holding part 110 and outside the first substrate side attachment parts 112 at both ends in the X-axis direction. In addition, the first cover side attachment part 122 of the cover part 120 is attached to the first holding part side attachment part 113.

The first cover side mounting portion 122 is disposed on the bottom 15a side (negative Z-axis side) of the energy storage device 1 in the cover portion 120, and is rotatably attached to the substrate holding portion 110. Specifically, the two first cover side mounting portions 122 are disposed at positions corresponding to the two first holding portion side mounting portions 113 on the negative Z-axis side and both ends in the X-axis direction of the cover portion 120. In other words, the first cover side mounting portions 122 are disposed at the ends on the negative Z-axis side of the side wall portions on both sides in the X-axis direction of the second cover wall portion 121b.

5(a) and (c), the first holding part side mounting part 113 is a cylindrical shaft extending in the X-axis direction and has a circular shape when viewed from the X-axis direction. The first cover side mounting part 122 has an inverted C shape when viewed from the X-axis direction, with the part on the Y-axis minus direction side open and recessed in the Y-axis plus direction. The first holding part side mounting part 113 is inserted and arranged in the recessed part of the first cover side mounting part 122. In other words, the first cover side mounting part 122 is arranged on both sides of the Z-axis direction and on the Y-axis plus side of the first holding part side mounting part 113 so as to surround both sides of the Z-axis direction and the Y-axis plus side of the first holding part side mounting part 113. As a result, the first cover side mounting part 122 is arranged on the side in the direction from the cover part 120 toward the substrate holding part 110 (Y-axis plus direction) from the first holding part side mounting part 113.

7(a) and (c), the first cover side mounting portion 122 is configured to be rotatable (rotatable) relative to the first holding part side mounting portion 113. In other words, when the first cover side mounting portion 122 rotates (turns) relative to the first holding part side mounting portion 113, the cover portion 120 rotates (turns) relative to the board holding part 110 around the first holding part side mounting portion 113 as an axis. In addition, a rotation restriction portion 127 (see FIG. 7(c)) provided near the first cover side mounting portion 122 abuts against the board holding part 110, thereby restricting the rotation of the cover portion 120 relative to the board holding part 110. In other words, the rotation restriction portion 127 is a planar portion disposed on the lower end surface of the first cover wall portion 121a of the cover body 121, and restricts the rotation of the cover portion 120 relative to the substrate holding portion 110 by abutting against the surface on the negative Y-axis side of the lower portion of the substrate holding portion 110 (such as the grip portion 115).

In this embodiment, the rotation of the cover part 120 is restricted when the cover part 120 is rotated 90° relative to the substrate holding part 110, and in this state, the substrate 200 can be attached to and detached from the substrate holding part 110. Specifically, while rotating the cover part 120 relative to the substrate holding part 110, the second cover side attachment part 123 described below is removed from the second holding part side attachment part 114b of the upper attachment part 114. Then, after rotating the cover part 120 approximately 90° relative to the substrate holding part 110, the substrate 200 can be attached to and detached from the substrate holding part 110. This allows the substrate 200 to be attached to and detached from the substrate holding part 110 without removing the cover part 120 from the substrate holding part 110.

In this state, the cover part 120 can be removed from the substrate holding part 110 by moving the cover part 120 in the positive direction of the Z axis. When the cover part 120 is removed from the substrate holding part 110, the cover part 120 can be attached to the substrate holding part 110 by inserting the first holding part side attachment part 113 into the first cover side attachment part 122 from the negative direction of the Z axis with the cover part 120 perpendicular to the substrate holding part 110. Then, when the cover part 120 is rotated so as to approach the substrate holding part 110, the second cover side attachment part 123 can be attached to the second holding part side attachment part 114b. In this way, the cover part 120 can be attached to and detached from the substrate holding part 110. Note that the angle at which the cover part 120 is restricted with respect to the substrate holding part 110 is not limited to 90°, and may be any angle such as 90°±10°, as long as the angle allows the cover part 120 to be attached to and detached from the substrate holding part 110. If the angle is greater than 90°, the substrate 200 can be easily replaced, and if the angle is less than 90°, the substrate 200 can be prevented from falling.

[2.2.4 Description of the upper mounting portion 114 and the second cover side mounting portion 123]
The upper attachment portion 114 is disposed in the center of the substrate holding portion 110 in the X-axis direction on the positive side of the Z-axis (opposite side to the bottom portion 15a), and is attached so as to be engageable with the power storage unit 10 and the cover portion 120. Specifically, the upper attachment portion 114 has a second substrate side attachment portion 114a which is attached to the power storage unit 10 by engaging with it, and a second holding portion side attachment portion 114b which is attached to the cover portion 120 by engaging with it.

As shown in FIG. 6 and other figures, the second board side mounting portion 114a is disposed on the Z-axis minus side of the upper mounting portion 114 and is a protrusion that protrudes in the Z-axis minus direction. The board unit mounting portion 16 of the storage unit 10 has a second storage side mounting portion 16c to which the second board side mounting portion 114a is attached at a position corresponding to the second board side mounting portion 114a at the center in the X-axis direction on the Z-axis plus side. A rectangular opening 16d is formed in the second storage side mounting portion 16c. The second board side mounting portion 114a is inserted into the opening 16d from the Z-axis plus direction and engages with the edge of the opening 16d on the Y-axis minus direction side, thereby engaging with the second storage side mounting portion 16c. As a result, the board holding portion 110 and the storage unit 10 are engaged on the Z-axis plus direction side.

The second holding part side mounting part 114b is a protrusion that is disposed on the Z-axis positive side of the upper mounting part 114 and protrudes in the Z-axis negative direction, to which the second cover side mounting part 123 of the cover part 120 is attached. The second cover side mounting part 123 is a part that is disposed in the center of the X-axis direction on the Z-axis positive side (opposite the bottom part 15a) of the cover part 120, and has a protrusion 123a that protrudes in the Z-axis positive direction. This protrusion 123a is disposed on the Y-axis positive side of the second holding part side mounting part 114b, and engages with the second holding part side mounting part 114b in the Y-axis direction, thereby engaging the cover part 120 and the board holding part 110 on the Z-axis positive side. In this way, the second cover side mounting part 123 is a part that is attached to the board holding part 110 by engaging with the board holding part 110.

[2.2.5 Description of gripping portion 115]
The grip portion 115 is a handle for gripping the energy storage device 1, and is disposed in the center of the substrate holding portion 110 in the X-axis direction on the bottom 15a side (negative Z-axis side) of the energy storage device 1. Specifically, the grip portion 115 is a portion that is long in the X-axis direction and has the above-mentioned first substrate side mounting portion 112 at both ends. In other words, as described above, at least a portion of the grip portion 115 (first substrate side mounting portion 112) is disposed closer to the bottom 15a side of the energy storage device 1 than at least a portion of the energy storage unit 10 (first energy storage side mounting portion 16a). In this embodiment, the grip portion 115 is formed integrally with the substrate holding portion 110.

In this way, the grip portion 115 functions as a handle on the negative Y-axis side of the storage device 1. Also, on the positive Y-axis side of the storage device 1, the portion where the connection portion 15c of the exterior body support 15 of the storage unit 10 and the connection portion 17c of the exterior body cover 17 are connected functions as a handle (second grip portion) (see FIG. 2). The definition of this second grip portion is not particularly limited, and for example, only the connection portion 15c may be referred to as the second grip portion instead of both the connection portion 15c and the connection portion 17c, or the central portion in the X-axis direction of the connection portion 15c or the connection portion 15c and the connection portion 17c may be referred to as the second grip portion, or other portions may be referred to as the second grip portion. The second grip portion is formed so that the metal plate is folded down so that it does not become an edge when the worker grips it. The area where the connection part 15b of the exterior body support 15 and the connection part 17b of the exterior body lid 17 are connected is covered by the cover part 120.

The gripping portion 115 has an inclined surface 115a on the side of the storage unit 10 (positive Y-axis side) that inclines in the opposite direction (negative Y-axis direction) to the storage unit 10 as it approaches the bottom 15a of the storage device 1 (negative Z-axis direction). In other words, the surface of the gripping portion 115 facing the negative Y-axis is parallel to the XZ plane, whereas the surface facing the positive Y-axis is inclined from the XZ plane. The inclination angle of the inclined surface 115a is not particularly limited, but it is preferable that the inclination angle be such that the operator's fingers can be inserted (or can be easily inserted) into the positive Y-axis side of the gripping portion 115 so that the gripping portion 115 can be grasped (or can be easily grasped). In this embodiment, the inclined surface 115a is inclined at about 45° with respect to the vertical direction.

In addition, the gripper 115 has a gripper recess 115b recessed in the opposite direction (Y-axis minus direction) to the storage unit 10 on the surface on the side of the storage unit 10 (Y-axis plus direction) (see FIG. 6). That is, the gripper recess 115b is a recess formed by recessing the inclined surface 115a of the gripper 115 in the Y-axis minus direction. In this embodiment, two gripper recesses 115b arranged in the X-axis direction are formed on the inclined surface 115a of the gripper 115. Alternatively, it can be said that the inclined surface 115a is formed between the two gripper recesses 115b and on both sides of the two gripper recesses 115b in the X-axis direction. In other words, a wall is arranged between the two gripper recesses 115b and on both sides of the two gripper recesses 115b in the X-axis direction (edge portions of the gripper 115), and the inclined surface 115a is formed on the wall. The size, shape, and number of gripping recesses 115b are not particularly limited, but it is preferable that the size, shape, and number of recesses are such that the fingers of the operator's hand can be inserted (or can be easily inserted) so that the gripping portion 115 can be gripped (or can be easily gripped).

In addition, the tip of the gripping portion 115 in the negative Z-axis direction protrudes forward (in the negative Y-axis direction) and has an R-shape, which prevents the edge of the gripping portion 115 from digging into the worker's hand when the worker grasps the gripping portion 115.

[2.2.6 Description of fixing portion 116 and substrate restricting portion 126]
The fixing portion 116 is a portion that fixes the substrate 200 in a position where the plate surface of the substrate 200 faces a direction intersecting the vertical direction (Z-axis direction), and in this embodiment, the fixing portion 116 fixes the substrate 200 in a position where the plate surface of the substrate 200 faces a horizontal direction (Y-axis direction). Specifically, the fixing portion 116 is a protrusion that protrudes in the negative Y-axis direction from the surface of the substrate holding portion 110 facing the substrate 200 (the surface on the negative Y-axis direction side of the first holding portion wall portion 111a of the holding portion main body 111), and fixes the substrate 200 in a press-fit state. The fixing portion 116 does not conduct electricity with the substrate 200, and fixes the substrate 200 in a non-conductive state.

In this embodiment, multiple (six) fixing portions 116 are arranged on the outer periphery of the first holding portion wall 111a. That is, three fixing portions 116 are arranged side by side in the X-axis direction at the end of the first holding portion wall 111a on the positive side of the Z-axis, and three fixing portions 116 are arranged side by side in the X-axis direction at the end of the first holding portion wall 111a on the negative side of the Z-axis. That is, the fixing portions 116 are arranged at positions corresponding to the through holes 230 formed in the substrate 200.

Specifically, as shown in FIG. 6 and FIG. 7(b), the fixing portion 116 is a protrusion that becomes thinner toward the tip, and is inserted and pressed into the through hole 230 of the substrate 200 to fix the substrate 200. That is, the fixing portion 116 has a tapered shape in which the width in the X-axis direction and the Z-axis direction becomes smaller toward the negative Y-axis direction. The fixing portion 116 also has a cross shape (+ shape) when viewed from the Y-axis direction, and abuts against the inner surface of the through hole 230 in the Z-axis direction, is compressed, and is pressed into the through hole 230. The fixing portion 116 is configured not to abut against the inner surface of the through hole 230 in the X-axis direction so that it can be inserted into the through hole 230 even if the position of the fixing portion 116 with respect to the through hole 230 is misaligned. The fixing portion 116 also fixes the substrate 200 at a position separated from the surface facing the substrate 200 (the surface on the negative Y-axis side of the first holding portion wall portion 111a). In other words, a space is formed between the substrate 200 and the first holding portion wall 111a.

The size and shape of the fixing portion 116 and the through hole 230 are not particularly limited, so long as the fixing portion 116 can be inserted into the through hole 230 in a press-fit state. For example, the fixing portion 116 and the through hole 230 may be circular, elliptical, oval, triangular, or other polygonal shape when viewed from the Y-axis direction, and the fixing portion 116 may also come into contact with the inner surface of the through hole 230 in the X-axis direction and be compressed. Furthermore, the number and arrangement of the fixing portion 116 and the through hole 230 are not particularly limited.

The substrate restricting portion 126 of the cover portion 120 is disposed on the negative Y-axis side of the substrate 200. The substrate restricting portion 126 is a protrusion that protrudes in the positive Y-axis direction from the surface of the first cover wall portion 121a of the cover portion main body 121 on the positive Y-axis side, and restricts the movement of the substrate 200 in the direction toward the cover portion 120 (negative Y-axis direction). When the substrate 200 attempts to move in the negative Y-axis direction, the tip of the substrate restricting portion 126 abuts against the substrate 200, restricting the movement of the substrate 200 in the negative Y-axis direction. In other words, the fixed portion 116 restricts the movement of the substrate 200 in the positive Y-axis direction, and the substrate 200 is restricted from moving in both directions in the Y-axis direction by the fixed portion 116 and the substrate restricting portion 126.

In this embodiment, multiple (four) cylindrical board restriction portions 126 are arranged on the outer periphery of the first cover wall portion 121a. In other words, the board restriction portions 126 are arranged on the outer periphery of the board 200, and in positions that do not overlap with the fixed portion 116 when viewed from the Y-axis direction. Note that the size, shape, number, and arrangement position, etc. of the board restriction portions 126 are not limited to those described above.

[2.2.7 Description of cable placement section 125]
Next, the configuration of the cable arrangement portion 125 of the cover portion 120 will be described with reference to Figs. 9 and 10. Fig. 9 is a perspective view showing a configuration in a state where the cable 30 is arranged in the cable arrangement portion 125 of the board unit 20 according to this embodiment. Specifically, Fig. 9 is a perspective view showing an enlarged end portion of the energy storage device 1 shown in Fig. 1 on the negative Y-axis side. Fig. 10 is a front view showing a connection configuration of the cable 30 of the energy storage device 1 according to this embodiment. Specifically, Fig. 10 shows a configuration when two energy storage devices 1 are arranged in the Z-axis direction and the cables 30 are connected, as viewed from the negative Y-axis side.

The cable arrangement section 125 is disposed at the end of the cover section 120 on the side opposite the bottom section 15a of the energy storage device 1 in the positive direction of the X-axis (the positive direction of the Z-axis), and is the portion where the positive power cable 31 of the cable 30 is disposed. As shown in Figures 4, 5, 9, etc., the cable arrangement section 125 has a first recess 125a, an opening/closing restricting section 125b, an inclined section 125c, and a cable restricting section 125d.

The first recess 125a is a recess in the negative Z-axis direction (a second direction intersecting with the first direction) of the end of the upper surface of the wall portion (also referred to as the third cover wall portion) on the positive Z-axis side of the cover portion 120. The first recess 125a can also be said to be a recess in the front surface (the surface on the negative Y-axis direction) of the first cover wall portion 121a. Specifically, the first recess 125a is a recess that extends in the Y-axis direction and is formed so as to penetrate the cover portion 120 in the Y-axis direction, and the positive power cable 31 is disposed inside.

The opening/closing restricting portion 125b is a flat rectangular wall portion parallel to the XZ plane, arranged in the positive X-axis direction of the first recess 125a. In other words, the opening/closing restricting portion 125b is a portion extending in the positive Z-axis direction from the end of the first cover wall portion 121a on the positive Z-axis side and the positive X-axis side, or a part of the end of the first cover wall portion 121a on the positive Z-axis side and the positive X-axis side. The opening/closing restricting portion 125b restricts the cover portion 120 from opening and closing relative to the board holding portion 110 by arranging the positive power cable 31 in the negative Y-axis direction. Specifically, the opening/closing restricting portion 125b restricts the cover portion 120 from rotating relative to the board holding portion 110. In this case, the opening/closing restricting portion 125b also restricts the board holding portion 110 from rotating relative to the board unit mounting portion 16.

The inclined portion 125c is disposed between the first recess 125a and the opening/closing restricting portion 125b, and is a flat rectangular wall portion inclined with respect to the opening/closing restricting portion 125b. Specifically, the inclined portion 125c is disposed with an inclination such that it approaches the negative direction of the Y axis as it approaches the positive direction of the X axis. When the positive power cable 31 disposed in the first recess 125a is disposed in the negative direction of the Y axis of the opening/closing restricting portion 125b, the positive power cable 31 is also disposed in the negative direction of the Y axis of the inclined portion 125c.

The cable regulation portion 125d is a flat rectangular wall portion parallel to the XY plane, located between the first recess 125a and the opening/closing regulation portion 125b, and in the positive Z-axis direction of the inclined portion 125c. In other words, the cable regulation portion 125d is arranged to protrude in the negative X-axis direction and the negative Y-axis direction. When the positive power cable 31 arranged in the first recess 125a is arranged in the negative Y-axis direction of the opening/closing regulation portion 125b, the positive power cable 31 is arranged in the negative Z-axis direction of the cable regulation portion 125d. As a result, the cable regulation portion 125d regulates the movement of the positive power cable 31 in the positive Z-axis direction (a second direction intersecting the first direction).

In the above configuration, as shown in FIG. 10, multiple energy storage devices 1 are attached to shelves 2 of a rack, and the positive power cable 31 of one energy storage device 1 (e.g., energy storage device 1a) is connected to the negative power cable 32 of the other energy storage device 1 (e.g., energy storage device 1b). Specifically, in two energy storage devices 1a and 1b arranged in the Z-axis direction, the connector 33 connected to the positive power cable 31 of the energy storage device 1a is connected to the connector 34 connected to the negative power cable 32 of the energy storage device 1b.

In this case, the length, etc., of the positive power cable 31 of the storage device 1a is adjusted so that it cannot be connected to the negative power cable 32 of the storage device 1b unless it passes through the opening/closing regulator 125b in the negative Y-axis direction. In other words, one end of the positive power cable 31 is electrically connected to the storage unit 10 of one storage device 1, and the other end is connected to an external conductive member (the negative power cable 32 of the other storage device 1). The opening/closing regulator 125b is then positioned in the positive Y-axis direction of the positive power cable 31 when the positive power cable 31 is connected to the external conductive member.

In this way, when the positive power cable 31 is connected to an external conductive member, at least a part of the cover part 120 (opening/closing restricting part 125b) is arranged in the positive Y-axis direction (opposite to the first direction) of the positive power cable 31. In other words, the positive power cable 31 protrudes from the storage unit 10 and extends in the negative Y-axis direction (first direction) and is arranged in the first recess 125a. The positive power cable 31 is arranged in the negative Y-axis direction (first direction) of at least a part of the cover part 120 (the inclined part 125c and the opening/closing restricting part 125b) and connected to an external conductive member. This restricts the opening/closing (rotation) of the cover part 120 relative to the substrate holding part 110, and the movement of the positive power cable 31 in the positive Z-axis direction is also restricted by the cable restricting part 125d.

[3. Description of Effects]
As described above, according to the energy storage device 1 according to the embodiment of the present invention, the substrate holding portion 110 that holds the substrate 200 has the fixing portion 116 that fixes the substrate 200 in a press-fit state. By fixing the substrate 200 to the substrate holding portion 110 by press-fitting in this manner, there is no need to perform work such as attaching and removing screws, and therefore the substrate 200 can be easily attached and detached from the substrate holding portion 110. Furthermore, by fixing the substrate 200 to the substrate holding portion 110 by press-fitting, there is no need for members such as screws, and therefore the number of parts can be reduced.

The fixing portion 116 of the board holding portion 110 is a protrusion that becomes thinner toward the tip, and when pressed into the through hole 230 of the board 200, the board 200 is fixed at a position spaced apart from the opposing surface of the board holding portion 110. In this way, by providing a tapered protrusion on the board holding portion 110 and pressing the protrusion into the through hole 230 of the board 200, the board 200 can be easily attached and detached from the board holding portion 110 with a simple configuration. Furthermore, by fixing the board 200 at a position spaced apart from the opposing surface of the board holding portion 110, components can also be placed on the back surface of the board 200 (the surface on the opposing surface side).

In addition, when the plate surface of the substrate 200 faces a direction intersecting the vertical direction, it is difficult to attach and detach the substrate 200 to the substrate holding part 110 if the substrate 200 is fixed by screws or the like. Therefore, by fixing the substrate 200 to the substrate holding part 110 by press-fitting with the fixing part 116, the substrate 200 can be easily attached and detached to the substrate holding part 110 with a simple configuration. This is extremely effective in assembly work and maintenance work when there are a large number of energy storage devices 1.

In addition, since the substrate 200 is fixed to the fixing portion 116 of the substrate holding portion 110 by press-fitting, rather than by screwing, there is a risk that the substrate 200 may come loose from the fixing portion 116. For this reason, the cover portion 120 attached to the substrate holding portion 110 is provided with a substrate restricting portion 126 that restricts the movement of the substrate 200 towards the cover portion 120. This makes it possible to prevent the substrate 200, which is fixed to the fixing portion 116 of the substrate holding portion 110 by press-fitting, from coming loose from the fixing portion 116.

In addition, because the cover part 120 is rotatably attached to the substrate holding part 110, the cover part 120 can be easily opened and closed relative to the substrate holding part 110 by rotating the cover part 120 relative to the substrate holding part 110. This allows the substrate 200 to be easily attached and detached to and from the substrate holding part 110 even when the cover part 120 is attached to the substrate holding part 110.

In addition, the connectors 210 and 220 of the board 200 are arranged at an end on a side different from the side on which the axis about which the cover part 120 rotates relative to the board holding part 110 is located. This prevents the connectors 210 and 220, or the cables connected to the connectors 210 and 220, from getting in the way when rotating the cover part 120. This allows the cover part 120 to be rotated easily, for example, with the cables attached to the connectors 210 and 220, and therefore the board 200 can be easily attached and detached to and from the board holding part 110.

In addition, the connector 210 is disposed at the end of the board 200 on the positive side of the Z axis, and the socket faces in the positive direction of the Z axis (parallel to the board surface of the board 200), so that the connector 13b can be easily attached and detached, and the cable 13a is not disposed on the board surface of the board 200. This allows the board 200 to be easily attached and detached to the board holder 110.

The energy storage device 1 includes an energy storage unit 10 having an energy storage element 11, and a substrate unit 20 having a substrate 200 and a substrate accommodating section 100 and attached to the energy storage unit 10, and the substrate accommodating section 100 of the substrate unit 20 has a gripping section 115 for gripping the energy storage device 1. In this way, by providing the gripping section 115 on the substrate accommodating section 100 of the substrate unit 20, the substrate unit 20 does not get in the way and make it impossible to grip the energy storage device 1, or a complicated structure is not required to grip the energy storage device 1 while avoiding the substrate unit 20. As a result, the energy storage device 1 can be easily gripped using the gripping section 115, and the energy storage device 1 can be easily moved (lifted, pulled out, etc.). For example, as shown in FIG. 10, the task of lifting the energy storage device 1 to carry it to the shelf 2 of the rack, and the task of pushing or pulling out the energy storage device 1 after placing it on the shelf 2 can be easily performed.

In addition, if the gripping portion could be provided on the exterior body support 15 of the energy storage device 1 by sheet metal processing, the gripping portion could be provided easily, but in order to mount the energy storage device 1 on the shelf board 2 of a rack or the like, the exterior body support 15 is provided with a wall portion 16b. For this reason, it is not easy to provide a gripping portion on the exterior body support 15, and it is necessary to attach a gripping portion of a separate member, for example. For this reason, by providing the gripping portion 115 on the board accommodation portion 100 of the board unit 20, the number of parts is not increased and the gripping portion 115 can be easily configured.

In the substrate unit 20, the substrate 200 is fixed to the substrate holding part 110 by press-fitting. Therefore, even if the substrate unit 20 is slightly deformed by gripping the gripping part 115, the substrate 200 can move relative to the substrate holding part 110, so that deformation or other damage to the substrate 200 can be suppressed.

In addition, by attaching the board unit 20 to the end of the energy storage unit 10 in the longitudinal direction (Y-axis direction), the gripping portion 115 is also attached to the end of the energy storage unit 10 in the longitudinal direction. This allows the energy storage device 1, which is a heavy object, to be gripped in the longitudinal direction, so that the energy storage device 1 can be stably gripped and the energy storage device 1 can be easily moved.

In addition, at least a part of the gripping portion 115 of the board unit 20 (first board side mounting portion 112) is disposed closer to the bottom 15a of the energy storage device 1 than at least a part of the energy storage unit 10 (first energy storage side mounting portion 16a). This restricts the gripping portion 115 from moving relative to the energy storage unit 10, for example, when attempting to lift the energy storage device 1 by holding the gripping portion 115. Restricting the gripping portion 115 from moving relative to the energy storage unit 10 prevents the board unit 20 from coming off the energy storage unit 10. In this way, when moving the energy storage device 1 by holding the gripping portion 115, the board unit 20 can be prevented from coming off the energy storage unit 10, so that the energy storage device 1 can be moved easily.

In addition, since the board unit 20 is connected to the storage unit 10 at the bottom 15a side, the fulcrum of the force acting when gripping the grip 115 to move the storage device 1 is located on the bottom 15a side of the board unit 20, that is, at a location away from the board 200. In this case, by positioning the force point in the negative Z-axis direction (downward) from the fulcrum, the point of action becomes a position in the positive Z-axis direction (upward) from the fulcrum. Here, the position of the first board side attachment part 112 (the position of the first storage side attachment part 16a) is the fulcrum, and the position of the pad of the fingertip inserted by the operator into the grip recess 115b is the force point.

For example, assume a situation in which the storage device 1 is pulled toward the user (negative Y-axis direction) to be moved, such as when replacing the storage device 1. In this case, the worker inserts his or her finger into the gripping recess 115b of the gripping portion 115 of the board unit 20 and pulls the storage device 1 toward the user. At this time, if the position of the finger (point of force) is located in the negative Z-axis direction from the position (fulcrum) of the first board side mounting portion 112, the upper part of the board unit 20 becomes the point of action, and the force acts in a direction that pushes the storage unit 10 (positive Y-axis direction). If the position of the finger (point of force) is located above the position (fulcrum) of the first board side mounting portion 112, the board unit 20 will rotate as shown in FIG. 8 and attempt to come off the storage unit 10. In contrast, when the position of the finger (point of force) is located below the position (fulcrum) of the first board side mounting portion 112, the board unit 20 presses against the energy storage unit 10, preventing the board unit 20 from coming off the energy storage unit 10.

In order to position the finger (point of force) below the position (fulcrum) of the first board side mounting part 112, it is preferable that the gripping part recess 115b is recessed only to a relatively low position in the Z-axis direction. In this embodiment, the gripping part recess 115b is recessed to a position slightly higher than the first board side mounting part 112, but it may be recessed only to the same height as the position of the first board side mounting part 112 or to a position lower than the position of the first board side mounting part 112.

In addition, the gripping recess 115b is formed on the surface of the gripping portion 115 of the substrate unit 20 facing the power storage unit 10, which makes it easier for an operator to insert the fingers of his/her hand between the gripping portion 115 and the power storage unit 10, making it easier to grasp the gripping portion 115. This makes it easier to grasp the power storage device 1, and therefore easier to move the power storage device 1.

In addition, an inclined surface 115a is formed on the surface of the gripping portion 115 of the substrate unit 20 facing the power storage unit 10, which makes it easier for an operator to insert the fingers of his/her hand between the gripping portion 115 and the power storage unit 10, making it easier to grasp the gripping portion 115. This makes it easier to grip the power storage device 1, and therefore easier to move the power storage device 1.

The energy storage device 1 also includes an energy storage unit 10 having an energy storage element 11, and a substrate unit 20 having a substrate 200 and a substrate housing part 100 and attached to the energy storage unit 10. In the substrate housing part 100, the cover part 120 has a first cover side mounting part 122 that is rotatably attached to the substrate holding part 110. Since the cover part 120 is rotatably attached to the substrate holding part 110 in this manner, the cover part 120 can be easily rotated relative to the substrate holding part 110, and the cover part 120 can be easily opened and closed relative to the substrate 200. This allows easy access to the substrate 200, and therefore allows easy maintenance of the substrate 200 (installation, repair, replacement, etc.). This is extremely effective in assembly work and maintenance work when there are a large number of energy storage devices 1. The same applies to the following.

In addition, if the first cover side mounting portion 122 of the cover portion 120 is disposed on the opposite side (upper side) from the bottom 15a side of the energy storage device 1, it is necessary to lift the cover portion 120 when rotating the cover portion 120 relative to the board holding portion 110, which may make it difficult to perform work such as maintenance of the board 200. For this reason, the first cover side mounting portion 122 is disposed on the bottom 15a side (lower side) of the cover portion 120. This allows the first cover side mounting portion 122 to rotate on the bottom 15a side of the energy storage device 1, making it easy to perform work such as maintenance of the board 200.

In addition, in the substrate accommodating unit 100, the first cover side mounting portion 122 of the cover portion 120 is disposed on the side of the first holding portion side mounting portion 113 of the substrate holding portion 110 in the direction from the cover portion 120 toward the substrate holding portion 110. As a result, even if the cover portion 120 tries to come off the substrate holding portion 110, the movement of the first cover side mounting portion 122 is restricted by the first holding portion side mounting portion 113, so that the cover portion 120 can be prevented from coming off the substrate holding portion 110. In addition, when the first cover side mounting portion 122 is rotated 90° relative to the first holding portion side mounting portion 113, the first cover side mounting portion 122 is disposed above the first holding portion side mounting portion 113, so that the cover portion 120 can be prevented from falling off the substrate holding portion 110.

The cover part 120 of the substrate accommodating part 100 has, in addition to the first cover side mounting part 122, a second cover side mounting part 123 that engages with the substrate holding part 110. This allows the cover part 120 to be attached to the substrate holding part 110 by both the first cover side mounting part 122 and the second cover side mounting part 123, so that the cover part 120 can be attached more firmly to the substrate holding part 110.

In addition, in the substrate accommodating section 100, the cover section 120 has a rotation restriction section 127 that restricts rotation relative to the substrate holding section 110, thereby restricting rotation of the cover section 120 relative to the substrate holding section 110. This prevents the cover section 120 from rotating too much and coming into contact with other members or falling off the substrate holding section 110, making it easier to perform maintenance work on the substrate 200.

The energy storage device 1 also includes an energy storage unit 10 having an energy storage element 11, and a board unit 20 having a board 200 and a board holding part 110 and attached to the energy storage unit 10, and the board holding part 110 has a first board side attachment part 112 that is rotatably attached to the energy storage unit 10. In this way, the board holding part 110 of the board unit 20 is rotatably attached to the energy storage unit 10, so that the board unit 20 can be easily rotated with respect to the energy storage unit 10. This allows the board unit 20 to be easily moved and attached/detached with respect to the energy storage unit 10, so that work on the board 200 can be easily performed. This is extremely effective in assembly work and maintenance work when there are a large number of energy storage devices 1. The same applies to the following.

In addition, if the first board side mounting portion 112 of the board holding portion 110 is disposed on the opposite side (upper side) from the bottom 15a side of the energy storage device 1, the board unit 20 needs to be lifted up when rotating the board unit 20 relative to the energy storage unit 10. For this reason, the first board side mounting portion 112 is disposed on the bottom 15a side (lower side) of the energy storage device 1 in the board holding portion 110. As a result, the first board side mounting portion 112 rotates on the bottom 15a side of the energy storage device 1, so that the board unit 20 can be easily moved and attached/detached relative to the energy storage unit 10, and work on the board 200 can be easily performed.

In addition, by arranging the first board side mounting portion 112 closer to the bottom 15a of the energy storage device 1 than the first power storage side mounting portion 16a of the energy storage unit 10, the first board side mounting portion 112 is restricted from moving relative to the energy storage unit 10 when, for example, an attempt is made to lift the energy storage device 1 by gripping the board unit 20. This makes it possible to prevent the first board side mounting portion 112 from moving relative to the energy storage unit 10 and causing the board unit 20 to come off from the energy storage unit 10. In addition, by moving (pulling out) the first board side mounting portion 112 from the first power storage side mounting portion 16a toward the bottom 15a, the board unit 20 can be easily removed from the energy storage unit 10.

In addition to the first board-side mounting portion 112, the board holding portion 110 also has a second board-side mounting portion 114a that engages with the energy storage unit 10. This allows the board unit 20 to be attached to the energy storage unit 10 by both the first board-side mounting portion 112 and the second board-side mounting portion 114a, so that the board unit 20 can be attached more firmly to the energy storage unit 10.

In addition, when the board unit 20 has a cover portion 120 that is attached to the board holding portion 110, it is preferable that the board 200 can be easily accessed when working on the board 200. For this reason, the cover portion 120 is provided with a first cover side attachment portion 122 that is rotatably attached to the board holding portion 110. This allows easy access to the board 200 by rotating the cover portion 120 relative to the board holding portion 110 to open and close it, so that work on the board 200 can be easily performed.

In addition, the cover part 120 arranged in the negative Y-axis direction (first direction) of the substrate 200 is arranged at least in part in the positive Y-axis direction (opposite to the first direction) of the positive power cable 31 when the positive power cable 31 is connected to an external conductive member. In this way, when the cover part 120 is arranged on the outside of the substrate 200 and the positive power cable 31 is connected to an external conductive member (such as the negative power cable 32 of the adjacent storage device 1), at least a part of the cover part 120 (opening/closing restricting part 125b) is arranged inside the positive power cable 31 (positive Y-axis direction). As a result, when opening the cover part 120, the positive power cable 31 gets in the way and the cover part 120 cannot be opened. In other words, the positive power cable 31 must be removed from the external conductive member (the connector 34 of the negative power cable 32 of the other storage device 1 in the above embodiment) and the positive power cable 31 must be moved in order to open the cover part 120, and therefore work on the substrate 200 cannot be performed. Therefore, before performing work on the substrate 200, the connection between the positive power cable 31 of the energy storage device 1 and the external conductive member is cut off, improving safety. In other words, when a power storage facility is constructed by connecting multiple energy storage devices 1, each of which has multiple energy storage elements 11 connected in series, the total voltage of the power storage facility will be high, for example, hundreds to thousands of volts. When performing work such as maintenance under such high voltage, the power cable is reliably removed, improving safety.

In addition, in the energy storage device 1, the positive power cable 31 protrudes from the energy storage unit 10 and extends in the negative Y-axis direction, crossing the cover part 120 in the negative Y-axis direction and being disposed in the negative Y-axis direction of at least a portion of the cover part 120 and connected to an external conductive member. In this manner, the positive power cable 31 is disposed so as to wrap (embrace) at least a portion of the cover part 120. This makes it possible to prevent the cover part 120 from opening when the positive power cable 31 is connected to an external conductive member, thereby improving safety.

In addition, by arranging the positive power cable 31 in the first recess 125a recessed in the negative Z-axis direction (second direction) of the cover part 120, the positive power cable 31 can be positioned relative to the cover part 120. Therefore, the positive power cable 31 can be stably arranged in the negative Y-axis direction of at least a part of the cover part 120. This makes it possible to prevent the cover part 120 from opening when the positive power cable 31 is connected to an external conductive member, thereby improving safety.

In addition, the cover part 120 restricts the movement of the positive power cable 31 in the positive direction of the Z axis (second direction) by the cable restricting part 125d, thereby preventing the positive power cable 31 from moving from the negative direction of the Y axis of the cover part 120. This makes it possible to prevent the cover part 120 from opening when the positive power cable 31 is connected to an external conductive member, thereby improving safety.

In addition, because the cover portion 120 is rotatably attached to the substrate holding portion 110, in order to open the cover portion 120 and remove the substrate 200, it is necessary to rotate the cover portion 120 relative to the substrate holding portion 110. However, if at least a portion of the cover portion 120 is disposed in the positive Y-axis direction of the positive power cable 31, the cover portion 120 cannot be rotated. As a result, the cover portion 120 cannot be opened unless the positive power cable 31 is removed from the external conductive member and the positive power cable 31 is moved, thereby improving safety.

[4. Description of Modifications]
Although the energy storage device 1 according to the present embodiment has been described above, the present invention is not limited to the above embodiment. In other words, the embodiment disclosed herein is illustrative and not restrictive in all respects, and the scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope equivalent to the claims.

For example, in the above embodiment, the board unit 20 is attached to the end of the energy storage unit 10 in the longitudinal direction (Y-axis direction). However, the board unit 20 may be attached to the end of the energy storage unit 10 in the X-axis direction or Z-axis direction.

In addition, in the above embodiment, the first holding part side mounting part 113 of the substrate holding part 110 and the first cover side mounting part 122 of the cover part 120 are arranged on the bottom 15a side (negative Z-axis side) of the energy storage device 1. However, the first holding part side mounting part 113 and the first cover side mounting part 122 may be arranged in any position, such as on the positive Z-axis side or in the center in the Z-axis direction.

In the above embodiment, the first holding part side mounting part 113 of the substrate holding part 110 is an axis body, and is inserted and arranged from the open side of the first cover side mounting part 122 of the cover part 120. However, the shapes of the first holding part side mounting part 113 and the first cover side mounting part 122 are not particularly limited. For example, the first cover side mounting part 122 may be open in any direction, or may be a through hole without an opening, into which the first holding part side mounting part 113 is inserted. Alternatively, the first holding part side mounting part 113 and the first cover side mounting part 122 may have the opposite configuration, that is, the first cover side mounting part 122 may be an axis body and inserted into the first holding part side mounting part 113. Furthermore, the cover part 120 does not have to be attached to be rotatable with respect to the substrate holding part 110.

In addition, in the above embodiment, the cover part 120 has a first cover side mounting part 122 and a second cover side mounting part 123 that are attached to the board holding part 110. However, the cover part 120 does not have to have the second cover side mounting part 123, and does not have to have the first cover side mounting part 122. The same applies to the board holding part 110 side. In addition, the cover part 120 does not have to have a rotation restriction part 127.

In addition, in the above embodiment, the first board side mounting portion 112 of the board holding portion 110 and the first power storage side mounting portion 16a of the power storage unit 10 are arranged on the bottom 15a side (negative Z-axis side) of the power storage device 1. However, the first board side mounting portion 112 and the first power storage side mounting portion 16a may be arranged in any position, such as on the positive Z-axis side or in the center in the Z-axis direction.

In the above embodiment, the first board side mounting portion 112 of the board holding portion 110 is an axis body, the first power storage side mounting portion 16a of the power storage unit 10 has an opening at the portion on the negative Z-axis direction side, and the first board side mounting portion 112 is inserted into the first power storage side mounting portion 16a. However, the shapes of the first board side mounting portion 112 and the first power storage side mounting portion 16a are not particularly limited. For example, the first power storage side mounting portion 16a may have an opening at any portion in any direction, or may be a through hole without an opening, into which the first board side mounting portion 112 is inserted. Alternatively, the first board side mounting portion 112 and the first power storage side mounting portion 16a may have the opposite configuration, that is, the first power storage side mounting portion 16a may be an axis body and inserted into the first board side mounting portion 112. Furthermore, the board holding portion 110 does not have to be attached to the power storage unit 10 so as to be rotatable.

In addition, in the above embodiment, the board holding part 110 has a first board side mounting part 112 and a second board side mounting part 114a that are attached to the energy storage unit 10. However, the board holding part 110 does not have to have the second board side mounting part 114a, and does not have to have the first board side mounting part 112. The same applies to the energy storage unit 10 side.

In the above embodiment, the fixing portion 116 of the substrate holding portion 110 is a protrusion that becomes thinner toward the tip, and the substrate 200 is fixed at a position spaced apart from the opposing surface of the substrate holding portion 110. However, the fixing portion 116 does not have to have a tapered shape, and the substrate 200 may be fixed in a state where it is in contact with the opposing surface of the substrate holding portion 110.

In the above embodiment, the substrate 200 is fixed in a position in which the plate surface faces in a direction intersecting the vertical direction. However, the substrate 200 may be fixed in a position in which the plate surface faces in the vertical direction (horizontally).

In the above embodiment, the cover part 120 has the board restricting part 126. However, if the board 200 can be firmly fixed by the fixing part 116, the cover part 120 does not need to have the board restricting part 126. Alternatively, instead of the cover part 120 having the board restricting part 126, the board 200 may be fixed to the fixing part 116 or the like with an adhesive or the like.

In addition, in the above embodiment, the connectors 210 and 220 of the board 200 are arranged at the end on a side different from the side on which the axis about which the cover part 120 rotates relative to the board holding part 110 is located, but they may also be arranged on the side on which the axis is located.

In addition, in the above embodiment, the opening/closing restricting portion 125b of the cover portion 120 is arranged in the positive Y-axis direction (opposite the first direction) of the positive power cable 31. However, the opening/closing restricting portion 125b may be arranged in the positive Y-axis direction of a cable other than the positive power cable 31, such as the negative power cable 32 or a communication cable. Alternatively, the cover portion 120 may not have the cable restricting portion 125d, and may not have the opening/closing restricting portion 125b.

In the above embodiment, the negative power cable 32 of the adjacent energy storage device 1 is exemplified as an external conductive member to which the positive power cable 31 is connected. However, various other things can be exemplified as the external conductive member, such as the positive power cable 31 of the adjacent energy storage device 1, the negative power cable 32 or the positive power cable 31 of a non-adjacent energy storage device 1, an external control device that controls multiple energy storage devices 1, etc.

In the above embodiment, the substrate accommodating unit 100 has the substrate holding unit 110 and the cover unit 120, but the substrate accommodating unit 100 may not have the cover unit 120. Alternatively, the substrate accommodating unit 100 may not have the substrate holding unit 110. In this case, the substrate 200 may be attached to the cover unit 120, and the gripping unit 115 may be provided on the cover unit 120. Even if the substrate accommodating unit 100 has the substrate holding unit 110, the substrate 200 may be attached to the cover unit 120, and the gripping unit 115 may be provided on the cover unit 120. In other words, the gripping unit 115 may be provided on the substrate accommodating unit 100.

In addition, in the above embodiment, the gripping portion 115 of the substrate unit 20 is formed with an inclined surface 115a and a gripping portion recess 115b. However, the gripping portion 115 may not have at least one of the inclined surface 115a and the gripping portion recess 115b. Alternatively, the substrate unit 20 may not have a gripping portion 115.

In addition, configurations constructed by arbitrarily combining the components included in the above embodiments and their variations are also included within the scope of the present invention.

In addition, the present invention can be realized not only as an energy storage device 1, but also as a substrate holding part 110 having a fixing part 116, or a substrate holding part 110 and a substrate 200.

The present invention can be applied to a storage device equipped with a storage element such as a lithium-ion secondary battery.

REFERENCE SIGNS LIST 1, 1a, 1b Energy storage device 2 Shelf 10 Energy storage unit 11 Energy storage element 11a Container 11b Positive electrode terminal 11c Negative electrode terminal 11d Spacer 12 Bus bar frame 13 Bus bar 13a, 30 Cable 13b, 33, 34, 210, 220 Connector 14 Exterior body main body 15 Exterior body support 15a Bottom 15b, 15c, 17b, 17c Connection 16 Board unit attachment 16a First power storage side attachment 16b Wall 16c Second power storage side attachment 16d, 124 Opening 17 Exterior body cover 17a Top 18 Exterior 20 Board unit 31 Positive power cable 32 Negative power cable 100 Board accommodating section 110 Board holding section 111 Holding portion main body 111a First holding portion wall portion 111b Second holding portion wall portion 112 First board side mounting portion 113 First holding portion side mounting portion 114 Upper mounting portion 114a Second board side mounting portion 114b Second holding portion side mounting portion 115 Grip portion 115a Inclined surface 115b Grip portion recess 116 Fixing portion 120 Cover portion 121 Cover portion main body 121a First cover wall portion 121b Second cover wall portion 122 First cover side mounting portion 123 Second cover side mounting portion 123a Protrusion 125 Cable placement portion 125a First recess 125b Opening/closing restriction portion 125c Inclined portion 125d Cable restriction portion 126 Board restriction portion 127 Rotation restriction portion 200 Board 230 Through hole

Claims (6)

A storage element;
A substrate electrically connected to the energy storage element;
A power storage device comprising: a substrate holding unit that holds the substrate,
The power storage device includes a plurality of the power storage elements,
the substrate and the substrate holder are located at an end of the energy storage device in an arrangement direction of the plurality of energy storage elements,
the substrate holding portion has a fixing portion that fixes the substrate in a press-fit state. A through hole is formed in the substrate,
2. The energy storage device according to claim 1, wherein the fixing portion is a protrusion that protrudes from a surface of the substrate holding portion facing the substrate and becomes thinner toward a tip thereof, and when inserted and pressed into the through hole, fixes the substrate at a position spaced apart from the facing surface. The power storage device according to claim 1 , wherein the fixing portion fixes the substrate in a position in which a plate surface of the substrate faces a direction intersecting with a vertical direction. Further, a cover portion is attached to the substrate holding portion,
The power storage device according to claim 1 , wherein the cover portion has a restricting portion that restricts movement of the substrate in a direction toward the cover portion. The power storage device according to claim 4 , wherein the cover portion is attached to the substrate holding portion so as to be rotatable relative to the substrate holding portion. The power storage device according to claim 5 , wherein the board has a connector at an end portion on a side different from a side on which an axis about which the cover portion rotates relative to the board holding portion is provided.

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