JP5146065B2 - Batteries, assembled batteries, vehicles, and battery-equipped devices - Google Patents

Description

  The present invention relates to a battery including an electrode terminal partially disposed above a battery case, an assembled battery using a plurality of the batteries, a vehicle equipped with the battery or the assembled battery, and a battery-equipped device.

In recent years, with the spread of portable electronic devices such as mobile phones, notebook computers, and video camcorders and vehicles such as hybrid electric vehicles, the demand for batteries used for these driving power sources is increasing.
Among such batteries, there is a battery in which an electrode terminal that is electrically connected to a power generation element inside the battery is provided outside the battery case, and an external connection terminal is connected to the electrode terminal. For example, in Patent Document 1, a metal bolt (electrode terminal) located outside the battery case, a pole column protruding from the inside of the battery case toward the outside, and conducting with the power generation element, and the bolt and the pole column A battery (lead storage battery) including a metal bolt fixing metal to be electrically connected is described. This battery has a bolt insertion hole and a pole post insertion hole in a bolt fixing bracket. Among these, since a female screw is formed inside the bolt insertion port, the bolt is fixed to the bolt insertion port. On the other hand, the pole column is inserted into the pole column insertion port, and the pole column and the bolt fixing bracket are joined to each other by welding.

JP 2000-164199 A

  By the way, in the battery described in Patent Document 1, when an external connection terminal is inserted into a bolt and tightened with a nut, torque is applied around the axis of the bolt. However, since the bolt is fixed to the bolt fixing bracket, the bolt fixing bracket tries to move together with the bolt around the axis of the bolt. In addition, in this battery, since the axis of the bolt is parallel to the axis of the pole column, the bolt fixing bracket and the pole column rotate around the axis of the pole column. Then, in this battery, the sealing agent that surrounds and fixes the bolt fixing bracket is peeled off, and the sealing performance is deteriorated, and the defect such as insufficient bonding between the bolt fixing bracket and the pole pole occurs. There is a fear.

Accordingly, the present inventors have devised a battery in which a bolt and a bolt fixing bracket are held by a terminal insulating member, and the terminal insulating member is fixed on the battery case. In this battery, while forming a recessed part in a battery case, the terminal insulating member is provided with a projecting part that can be fitted to the recessed part, and a bolt or a bolt fixing bracket is fixed on the battery case by fitting. In this battery, since the terminal insulating member is fitted in the recess of the battery case, even if torque is applied around the axis of the bolt, the bolt, the bolt fixing bracket, and the terminal insulating member that holds the same are rotated together. It can prevent moving to the direction along the plane of a battery case.
However, it is technically difficult and costly to provide the battery case with a sufficiently deep recess.

  The present invention has been made in view of such problems, and in a simple configuration, when an external connection terminal is connected to an electrode terminal, the electrode terminal and a terminal insulating member for fixing the electrode terminal are moved. It aims at providing the battery which prevented. Also, an assembled battery having a plurality of batteries, each of which has an assembled battery that prevents the electrode terminal and the terminal insulating member from moving when the external connection terminal is connected, and can ensure insulation between the batteries. The purpose is to provide.

  And the solution means that the terminal forming part which forms the terminal forming surface is made of a metal case and the first terminal part made of a metal material and connected to the first external connection terminal is located above the terminal forming surface. A first electrode terminal member having a second terminal portion made of a metal material, spaced apart from and insulated from the first electrode terminal member, and connected to the second external connection terminal. It consists of a two-electrode terminal member and an insulating material, is interposed between the first electrode terminal member and the terminal forming portion, insulates both, and attaches and detaches the first external connection terminal to the first terminal portion The first electrode terminal member that holds the first electrode terminal member by restricting the movement of the first electrode terminal member that occurs in the direction along the terminal forming surface, and an insulating material. A two-electrode terminal member and the terminal forming portion; A second terminal insulating member that is interposed between and insulates the two and holds the second electrode terminal member, and is insulated from the first electrode terminal member, the second electrode terminal member, and the terminal forming portion. And a movement restricting member interposed between the first terminal insulating member and the second terminal insulating member on the terminal forming portion, wherein the first external connection terminal is connected to the first terminal portion. The movement of the first electrode terminal member and the first terminal insulating member that holds the first electrode terminal member, which occurs in a direction along the terminal forming surface when attaching and detaching, the relationship between the second terminal insulating member and itself. And a movement restricting member having a form of restricting by engagement between itself and the first terminal insulating member.

  For example, the first external connection terminal can be attached to or detached from the first terminal portion by a method such as inserting a through hole of the first external connection terminal into the first terminal portion of the first electrode terminal member and tightening with a nut. May be detached). At this time, the first electrode terminal member may move (translate or rotate) in a direction along the terminal forming surface, such as the first electrode terminal member rotating together with the nut.

In contrast, in the battery of the present invention, the first terminal insulating member restricts and holds the movement of the first electrode terminal member that occurs when the first external connection terminal is attached to and detached from the first terminal portion.
However, for example, when attaching / detaching the first external connection terminal to / from the first terminal portion, the movement of the first electrode terminal member is restricted in order to move in the direction along the terminal forming surface such as co-rotation. Even the first terminal insulating member may be moved in a direction along the terminal forming surface.

However, in addition to this, the battery of the present invention includes a movement limiting member interposed between the first insulating terminal member and the second insulating terminal member. The movement restricting member moves the first electrode terminal member and the first terminal insulating member between the second terminal insulating member and the movement restricting member, and between the movement restricting member and the first terminal insulating member. It has the form which restrict | limits by engagement. For this reason, in addition to the movement of the first terminal insulating member, the movement of the first electrode terminal member held by the first terminal insulating member can be appropriately restricted.
For this reason, the first terminal insulating member or the first electrode terminal member moves in a direction along the terminal forming surface, whereby a seal between the first electrode terminal member and the terminal forming portion of the battery case, or The problem that the seal between the first conductive member to which the first electrode terminal member is connected and the terminal forming portion of the battery case becomes insufficient can be prevented.

The movement restricting member is insulated from the first electrode terminal member, the second electrode terminal member, and the terminal forming portion, and may be composed of an insulating material (insulating resin material, insulating ceramic, etc.). In addition, a metal material coated with an insulating film can also be used.
Moreover, what is necessary is just to satisfy | fill the said requirements as a 1st electrode terminal member and a 2nd electrode terminal member. For example, in addition to the first terminal portion, the first terminal portion is configured integrally with the first terminal portion and includes a portion located in the battery case (extending from the battery case, and a part thereof is disposed above the terminal formation surface. 1 terminal portion). Further, all of the first electrode terminal members are disposed above the terminal formation surface, for example, the entire first electrode terminal member is the first terminal portion (the power generation element in the battery and the first electrode terminal member) Is connected to the battery case by a separate member (first conductive member) extending from the battery case through the terminal forming portion and extending above the terminal forming surface.

Moreover, as a form of a movement restriction member, what is necessary is just to satisfy said requirements. That is, when the first external connection terminal is connected to the first terminal portion of the first electrode terminal member, the second terminal insulation member and itself are interposed between the first terminal insulation member and the second terminal insulation member. And the movement of the first electrode terminal member when the first external connection terminal is connected to the first terminal portion by the engagement between the first terminal terminal insulating member and the first terminal insulating member. It should be. However, an appropriate form is adopted according to the size of the range in which movement is allowed, the direction in which movement is allowed, the dimensional tolerance of the first terminal insulating member and the second terminal insulating member, and the like.
For example, specifically, the first terminal insulating member and the second terminal insulating member are each formed with a protrusion protruding in a direction connecting the two. On the other hand, the thing which made the form which formed the recessed part which fits these protrusions to a movement limiting member is mentioned. On the contrary, a recess is formed in the first terminal insulating member and the second terminal insulating member, and the movement limiting member is provided with a protrusion that fits into the recesses of the first terminal insulating member and the second terminal insulating member. What was formed is mentioned.

  Further, in the battery described above, the first terminal portion includes a first male screw portion, and the first terminal insulating member is an axis of the first male screw portion with respect to the first electrode terminal member. When torque is applied around one axis, the first electrode terminal member is held in a form that restricts rotational movement of the first electrode terminal member, and the movement limiting member is the first electrode terminal. It is preferable that the battery has a configuration that restricts movement that occurs in the first terminal insulating member as the member rotates.

When the first terminal portion has the first male screw portion, for example, the first male screw portion is inserted into the through hole of the external connection terminal member and further tightened with a nut, so that the external connection terminal member is attached to the first terminal portion. It is conceivable to establish a connection form for connection.
However, in this case, when the nut is tightened, torque is applied around the first axis so that the first male screw portion is rotated, so that the first electrode terminal member is rotated and further held. Undesirable movement may occur, such as the first terminal insulating member rotating together with the nut.

  On the other hand, in the battery of the present invention, the first terminal insulating member holds the first electrode terminal member in a form that restricts the rotational movement of the first electrode terminal member, and the movement restricting member further includes the first limiting member. It is set as the form which restrict | limits the movement which arises in a 1st terminal insulating member with the rotational movement of an electrode terminal member. For this reason, when attaching / detaching the external connection terminal to / from the first terminal portion, even if torque is applied to the first terminal portion, the first electrode terminal member rotates and the first terminal insulating member moves accordingly. Can be appropriately limited.

  Furthermore, in any one of the above-described batteries, the second terminal insulating member is formed in a direction along the terminal forming surface when the second external connection terminal is attached to or detached from the second terminal portion. The movement restricting member restricts movement of the electrode terminal member, and the movement restricting member is formed in a direction along the terminal forming surface when the second external connection terminal is attached to or detached from the second terminal portion. The movement of the two-electrode terminal member and the second terminal insulating member that holds the two-electrode terminal member is limited by the engagement between the first terminal insulating member and itself, and the engagement between itself and the second terminal insulating member. It is preferable that the battery has such a form.

In the battery of the present invention, the second terminal insulating member restricts the movement of the second electrode terminal member that occurs when the second external connection terminal is attached to and detached from the second terminal portion, similarly to the first terminal insulating member described above. keeping.
However, for example, when the second external connection terminal is attached to or detached from the second terminal portion, if the second electrode terminal member tries to move in a direction along the terminal forming surface such as co-rotation, this movement is restricted. Even the two-terminal insulating member tends to move in the direction along the terminal forming surface.
However, the battery of the present invention includes a movement restricting member interposed between the first insulating terminal member and the second insulating terminal member, and the movement restricting member includes the second electrode terminal member and the second terminal insulating member. This movement is restricted by engagement between the first terminal insulating member and the movement restricting member, and further by engagement between the movement restricting member and the second terminal insulating member. For this reason, in addition to the movement of the second terminal insulating member, the movement of the second electrode terminal member held by the second electrode insulating member can be appropriately restricted.
For this reason, the second terminal insulating member or the second electrode terminal member moves in a direction along the terminal forming surface, whereby a seal between the second electrode terminal member and the terminal forming portion of the battery case, or The problem that the seal between the second conductive member connected to the second electrode terminal member and the terminal forming portion of the battery case becomes insufficient can be prevented.

  Furthermore, in the battery described above, the second terminal portion includes a second male screw portion, and the second terminal insulating member is an axis of the second male screw portion with respect to the second electrode terminal member. The second electrode terminal member is held in a form that restricts the rotational movement of the first electrode terminal member when torque is applied around two axes, and the movement restriction member is the second electrode terminal. It is preferable that the battery has a configuration that restricts movement of the second terminal insulating member as the member rotates.

  In the battery of the present invention, the second terminal insulating member holds the second electrode terminal member in a form that restricts the rotational movement of the second electrode terminal member in the same manner as the first terminal insulating member described above. The limiting member is configured to limit the movement that occurs in the second terminal insulating member as the second electrode terminal member rotates. For this reason, when attaching / detaching the external connection terminal to / from the second terminal portion, even if torque is applied to the second terminal portion, the rotational movement of the second electrode terminal member and the accompanying movement of the second terminal insulating member are prevented. Can be limited appropriately.

  Further, another solution is an assembled battery in which any one of the above-described batteries is arranged in a plurality of rows with the terminal forming portions facing in the same direction, and the movement limiting member is a part of the batteries. The self-battery and the neighboring battery are spaced apart by interposing between the self-battery to which the battery belongs and the neighboring battery located adjacent to at least one of the batteries adjacent to the self-battery. The assembled battery is a dual-purpose member that also serves as a separation insulating member that insulates.

In the battery pack of the present invention, each battery (self battery) includes a dual-purpose member that serves as both a movement limiting member and a separation insulating member. For this reason, when the batteries are arranged in a row, a separate insulating member that separates and insulates adjacent batteries is prepared separately, and there is no need to alternately arrange the batteries and the separate insulating members. An assembled battery can be easily formed, and an inexpensive assembled battery can be obtained.
Furthermore, since the movement restricting member is also used as the separation insulating member, its own position in the own battery to which it belongs is stabilized even as the movement restricting member. For this reason, in the case where the first and second external connection terminals are attached to and detached from the first terminal portion or the second terminal portion, the movement of the first terminal insulating member or the second terminal insulating member is restricted and the movement is restricted. When a stress is applied to the movement limiting member, problems such as the movement limiting member coming off can hardly occur.

  Further, in the above-described assembled battery, the dual-purpose member is at least one of a self battery case that is a battery case of the self battery and a battery case that is a battery case of the neighbor battery as the separation insulating member. It is good to be an assembled battery which has the form which comprises the flow path which distribute | circulates a refrigerant | coolant between either.

  In the assembled battery of the present invention, the dual-purpose member has a form constituting a refrigerant flow passage as a separation insulating member. Therefore, it is possible to easily cool each battery by circulating the refrigerant between the adjacent self battery and the adjacent battery.

  In addition, as a form of the separation insulating member of the dual-purpose member, for example, the dual-purpose member (separate insulating member) is in contact with the self battery case in a stripe shape (stripe shape) while in contact with the adjacent battery case over the entire surface. And a configuration in which a flow path is formed between the battery case and the self battery case. The self battery case is in contact with the entire surface, while the adjacent battery case is in contact with the stripe shape (stripe shape), thereby forming a flow path between the dual-purpose member (separate insulating member) and the adjacent battery case. It is distributed between the dual-purpose member (separation insulating member) and the self battery case and the adjacent battery case by contacting the form and the self battery case and the adjacent battery case in a stripe shape (stripe shape). The form which comprises a path | route is mentioned.

As the refrigerant, for example, air, ammonia, and gas such as CO _2, water, and liquids such as antifreeze oil.

  Furthermore, another solution is a vehicle equipped with any of the above-described batteries or the above-described assembled battery.

  The vehicle of the present invention is equipped with the battery or the assembled battery described above. Therefore, for example, when the first external connection terminal is attached to or detached from the first terminal portion of the battery constituting the battery or the assembled battery, the seal between the first electrode terminal member and the terminal forming portion of the battery case, or the first The problem that the seal between the first conductive member to which the one-electrode terminal member is connected and the terminal formation portion of the battery case becomes insufficient can be prevented, and a highly reliable vehicle can be obtained.

Note that the movement of the second electrode terminal member and the second terminal insulating member that holds the second electrode terminal member is limited by the engagement between the first terminal insulating member and itself, and the engagement between itself and the second terminal insulating member. In the case of using a battery having a movement restricting member having the following, there are the following advantages. That is, when the second external connection terminal is attached to or detached from the second electrode terminal portion of the battery, the seal between the second electrode terminal member and the terminal forming portion of the battery case or the second electrode terminal member is connected. 2 The problem that the seal between the conductive member and the terminal forming portion of the battery case becomes insufficient can be prevented, and the vehicle can be made more reliable.
Further, a vehicle equipped with an assembled battery using the above-described dual-purpose member can be an inexpensive vehicle equipped with an inexpensive assembled battery.

  The vehicle may be a vehicle that uses electric energy from a battery for all or part of its power source. For example, an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric Wheelchairs, electric assist bicycles, and electric scooters.

  Furthermore, another solution is a battery-mounted device on which any one of the above-described batteries or the above-described assembled battery is mounted.

  The battery-equipped device of the present invention is equipped with the above-described battery or assembled battery. Therefore, for example, when the first external connection terminal is attached to or detached from the first terminal portion of the battery constituting the battery or the assembled battery, the seal between the first electrode terminal member and the terminal forming portion of the battery case, or the first A problem that the seal between the first conductive member to which the one-electrode terminal member is connected and the terminal forming portion of the battery case becomes insufficient can be prevented, and a battery-equipped device with high reliability can be obtained.

Note that the movement of the second electrode terminal member and the second terminal insulating member that holds the second electrode terminal member is limited by the engagement between the first terminal insulating member and itself, and the engagement between itself and the second terminal insulating member. In the case of using a battery having a movement restricting member having the following, there are the following advantages. That is, when the second external connection terminal is attached to or detached from the second electrode terminal portion of the battery, the seal between the second electrode terminal member and the terminal forming portion of the battery case or the second electrode terminal member is connected. 2 The problem that the seal between the conductive member and the terminal forming portion of the battery case becomes insufficient can be prevented, and a battery-mounted device with higher reliability can be obtained.
In addition, in the battery-mounted device equipped with the assembled battery using the above-mentioned dual-purpose member, it can be an inexpensive battery-equipped device equipped with an inexpensive assembled battery. In addition, since the dual-purpose member serves as both the movement limiting member and the separation insulating member, for example, when the first external connection terminal is attached to and detached from the first terminal portion of the first electrode terminal member in this assembled battery, the movement limitation is performed. It can be set as the battery mounting apparatus which made it difficult to produce malfunctions, such as a member removing.

  The battery-equipped device may be any device equipped with a battery and using it as at least one of the energy sources. For example, a battery such as a personal computer, a mobile phone, a battery-driven electric tool, an uninterruptible power supply, etc. Various household appliances, office equipment, and industrial equipment driven by

(Embodiment 1)
Next, Embodiment 1 of the present invention will be described with reference to the drawings.
First, the battery 1 according to the first embodiment will be described. 1 is a perspective view of the battery 1, FIG. 2 is a cross-sectional view of the battery 1 (A-A portion in FIG. 1), and FIGS. 3 and 4 are partial enlarged cross-sectional views of the battery 1 (B- and C-portions in FIG. ) Respectively.
The battery 1 according to the first embodiment includes a rectangular box-shaped battery case 10, a positive electrode terminal structure 30 having a positive electrode external terminal member 31 and a first terminal insulating member 36, a negative electrode external terminal member 51 and a second terminal insulating member. 56 is a wound lithium ion secondary battery including a negative electrode terminal structure 50, a movement restricting member 20, a power generation element 80, and an electrolyte not shown (see FIGS. 1 and 2).

  Among them, the power generation element 80 is formed by winding a belt-like positive electrode plate 81 and a negative electrode plate 82 in a flat shape through a belt-like separator 83 made of polyethylene in the battery case 10 (see FIG. 2). . A positive electrode internal terminal member 41, which will be described later, is electrically connected to the positive electrode plate 81, and a negative electrode internal terminal member 61 is electrically connected to the negative electrode plate 82 by welding.

  On the other hand, the battery case 10 has a sealing lid 11 and a battery case main body 18 both made of aluminum (see FIG. 1). Among these, the battery case main body 18 is a bottomed rectangular box shape having an opening 19, and an insulating film (not shown) made of a resin is pasted on the entire inner surface.

Further, the sealing lid 11 has a rectangular plate shape and has a lid outer surface 11F facing upward in FIG. The sealing lid 11 closes the opening 19 of the battery case body 18 and is welded to the battery case body 18. The sealing lid 11 has a through hole 11K through which the positive electrode internal terminal member 41 and the negative electrode internal terminal member 61 can be inserted (see FIG. 3). The sealing lid 11 has a safety valve 12 composed of a cross-shaped groove 12S (see FIG. 6). This safety valve 12 is of the type that loses its function once it is opened. That is, the thickness of the recessed groove portion 12S is made thinner than other portions, and the groove portion 12S is cleaved when the pressure (gas pressure) inside the battery case 10 exceeds a predetermined valve opening pressure. Then open the valve.
Moreover, the sealing lid 11 has an injection hole 13 that is welded and closed with an aluminum cap (see FIG. 6). The injection hole 13 is a through hole for injecting an electrolytic solution (not shown) into the battery case 10 during manufacturing.

  Moreover, the positive electrode terminal structure 30, the negative electrode terminal structure 50, and the movement limiting member 20 are each arrange | positioned at this sealing lid 11 (refer FIG. 1). Specifically, the first terminal insulating member 36 of the positive terminal structure 30 and the second terminal insulating member 56 of the negative terminal structure 50 are separated from each other on the lid outer surface 11F of the sealing lid 12. Has been placed. The movement restricting member 20 is arranged so as to be interposed between the first terminal insulating member 36 and the second terminal insulating member 56.

  First, the positive electrode terminal structure 30 will be described. The positive terminal structure 30 includes a positive external terminal member 31 made of metal, a positive internal terminal member 41 mainly located inside the battery case 10, and a first terminal insulating member 36 made of an insulating resin (see FIG. 1, 2, 3).

Among these, the positive electrode internal terminal member 41 made of aluminum extends from the positive electrode internal terminal main body portion 42 located inside the battery case 10 and is plastically deformed, so that the battery case 10 and the positive electrode external terminal member 31 A positive electrode connecting plate 33 described later and a positive electrode caulking portion 43 formed by caulking a gasket 79 described later are included (see FIG. 2).
Among these, the positive electrode internal terminal main body portion 42 has a substantially rectangular plate-like case coupling portion 42 </ b> S larger in diameter than the through hole 11 </ b> K of the sealing lid 11, and the case coupling portion 42 </ b> S toward the positive electrode plate 81 of the power generation element 80. A positive electrode current collector portion 42T that is bent and welded to the positive electrode plate 81.

  Further, the positive caulking portion 43 extends from the vicinity of the center of the case coupling portion 42S along the third axis AX3 perpendicular to the center coupling portion 42S, is inserted through the through hole 11K of the sealing lid 11, and the positive external terminal member 31 described below is inserted. It extends on the positive electrode connecting plate 33. The positive electrode caulking portion 43 is plastically deformed so that the tip of the positive electrode caulking portion 43 extends outward in the radial direction of the third axis AX3, and presses the positive electrode connecting plate 33. Thus, the positive electrode caulking portion 43 is between the case coupling portion 42S and the battery case 10 (sealing lid 11), the positive electrode connecting plate 33 of the positive electrode external terminal member 31, the first terminal insulating member 36 to be described later, and to be described later. The gasket 79 is sandwiched and fixed, and the positive electrode internal terminal body 42 and the positive electrode connecting plate 33 are electrically connected.

  Further, the positive electrode external terminal member 31 made of a metal material includes a positive electrode terminal portion 32 formed of a bolt-shaped positive male screw portion 32B and a rectangular box-shaped leg portion 32L, and a positive electrode connecting plate 33 bent in a crank shape. Included (see FIGS. 1 and 3). Note that all of the positive electrode external terminal members 31 are disposed above the lid outer surface 11F of the sealing lid 11.

Among these, the positive electrode connecting plate 33 includes a fixing portion 33M fixed to the sealing lid 11 via the first terminal insulating member 36, and a terminal coupling portion 33N extending in parallel with the fixing portion 33M (FIG. 3). reference). Among these, the fixing portion 33M has the positive electrode caulking portion 43 of the positive electrode internal terminal member 41 inserted through the fixing portion through hole 33P. The periphery of the fixing portion through hole 33P in the fixing portion 33M is caulked by the positive electrode caulking portion 43 and is fixed above the lid outer surface 11F of the sealing lid 11.
Further, the terminal coupling portion 33N of the positive electrode connecting plate 33 has a coupling portion through hole 33Q through which the positive male screw portion 32B of the positive terminal portion 32 is inserted.

On the other hand, the positive terminal portion 32 includes a rectangular box-shaped leg portion 32L and a bolt-shaped positive male screw portion 32B protruding from the vicinity of the center of the leg portion 32L (see FIGS. 3 and 6). Among these, the positive male screw portion 32B has a bolt shape having a first axis AX1 orthogonal to the lid outer surface 11F of the sealing lid 11. The positive male screw portion 32B is inserted through the coupling portion through hole 33Q of the positive electrode connecting plate 33 and the first external connection terminal 71.
Further, the leg portion 32L is housed by being fitted into the concave portion 39 of the first terminal insulating member 36 described below so that the rotational movement of the first axis AX1 in the circumferential direction can be suppressed.

Further, a first terminal insulating member 36 made of an insulating resin is interposed between the positive external terminal member 31 and the sealing lid 11 (see FIG. 3). For this reason, the first terminal insulating member 36 insulates the positive external terminal member 31 and the sealing lid 11 from each other.
The first terminal insulating member 36 includes a step-shaped main body 37 that follows the crank shape of the positive electrode connecting plate 33, and a ring-shaped protrusion 38 that protrudes from the main body 37. Is inserted into the through hole 11K of the sealing lid 11. In addition, a square hole portion formed by digging in the upper portion of the main body 37 is defined as a recess 39. Further, the first terminal insulating member 36 is provided with an insulating through hole 36K that penetrates the main body portion 37 and the protruding portion 38.

The first terminal insulating member 36 holds the positive external terminal member 31 (see FIG. 3). Specifically, the main body portion 37 of the first terminal insulating member 36 has a peripheral edge portion 37H that protrudes toward the positive electrode connecting plate 33 so as to surround the peripheral end surface 33E of the positive electrode connecting plate 33 of the positive electrode external terminal member 31. . The peripheral portion 37H prevents the positive electrode connecting plate 33 from moving in the depth direction or the horizontal direction in FIG. Since the positive electrode connecting plate 33 is caulked and fixed to the positive electrode caulking portion 43 as described above, the main body portion 37 of the first terminal insulating member 36 holds the positive electrode connecting plate 33 while preventing the positive electrode connecting plate 33 from moving. ing. Further, the leg portion 32 </ b> L of the positive electrode terminal portion 32 described above is accommodated in the rectangular hole-shaped recess portion 39 of the first terminal insulating member 36. The accommodated leg portion 32 </ b> L is in contact with the terminal coupling portion 33 </ b> N of the positive electrode coupling plate 33 fixed by the positive electrode caulking portion 43. Thus, the first terminal insulating member 36 is connected to the positive electrode external terminal member 31. Each of the plate 33 and the positive terminal portion 32 is held.
For this reason, when attaching / detaching the first external connection terminal 71 to / from the positive electrode terminal portion 32, even if torque is applied to the positive electrode terminal portion 32, the rotational movement of the positive electrode external terminal member 31 can be limited.

  Further, a gasket 79 is disposed between the sealing lid 11 and the positive electrode inner terminal main body 42 of the positive electrode inner terminal member 41 (see FIGS. 3 and 6). The gasket 79 is made of an annular, insulating synthetic rubber or resin having a gasket through hole 79K.

  The gasket 79 described above and the protruding portion 38 of the first terminal insulating member 36 seal between the positive electrode internal terminal member 41 and the sealing lid 11 of the battery case 10. For this reason, mixing of moisture, foreign matter, etc. into the battery case 10 and leakage of the electrolyte from the battery case 10 are prevented.

  Next, the negative electrode terminal structure 50 will be described. Like the positive electrode terminal structure 30, the negative electrode terminal structure 50 includes a negative electrode external terminal member 51 made of metal, a negative electrode internal terminal member 61 mainly located inside the battery case 10, and a second terminal insulating member made of an insulating resin. 56 (see FIGS. 1, 2 and 3).

Among these, the negative electrode internal terminal member 61 made of copper, like the positive electrode internal terminal member 41, extends from the negative electrode internal terminal main body 62 located inside the battery case 10 and is plastically deformed, so that the battery The case 10 includes a negative electrode connecting plate 53 (to be described later) of the negative electrode external terminal member 51 and a negative electrode caulking portion 63 in which a gasket 79 (to be described later) is caulked (see FIG. 2).
Among these, the negative electrode internal terminal main body portion 62, like the positive electrode internal terminal main body portion 42, has a substantially rectangular plate-like case coupling portion 62S having a diameter larger than the through hole 11K of the sealing lid 11, and the case coupling portion 62S generates electric power. It includes a negative electrode current collector 62T that is bent toward the negative electrode plate 82 of the element 80 and welded to the negative electrode plate 82.

  Further, the negative electrode caulking portion 63 extends from the vicinity of the center of the case coupling portion 62S along the fourth axis AX4 orthogonal thereto, and is inserted through the through hole 11K of the sealing lid 11, and the negative electrode external terminal member 51 described below is inserted. It extends on the negative electrode connecting plate 53. The negative electrode caulking portion 63 is plastically deformed so that the tip thereof extends outward in the radial direction of the fourth axis AX4, and presses the negative electrode coupling plate 53. Thus, the negative electrode caulking portion 63 is between the case coupling portion 62S and the battery case 10 (sealing lid 11), the negative electrode connecting plate 53 of the negative electrode external terminal member 51, the second terminal insulating member 56 described later, and the gasket 79. Are fixed by sandwiching them, and the negative electrode internal terminal main body 62 and the negative electrode connecting plate 53 are electrically connected.

  Similarly to the positive electrode external terminal member 31, the negative electrode external terminal member 51 made of a metal material is bent in a crank shape, and a negative electrode terminal portion 52 including a bolt-shaped negative electrode male screw portion 52B and a rectangular box-shaped leg portion 52L. A negative electrode connecting plate 53 (see FIGS. 1 and 3). Note that each of the negative electrode external terminal members 51 is disposed above the lid outer surface 11F of the sealing lid 11.

Among these, the negative electrode connecting plate 53 includes a fixing portion 53M fixed to the sealing lid 11 via the second terminal insulating member 56, and a terminal coupling portion 53N extending in parallel with the fixing portion 53M (FIG. 4). reference). Among these, the fixing portion 53M has the negative electrode caulking portion 63 of the negative electrode internal terminal member 61 inserted through the fixing portion through hole 53P. The periphery of the fixing portion through hole 53P in the fixing portion 53M is caulked by the negative electrode caulking portion 63 and fixed above the lid outer surface 11F of the sealing lid 11.
Further, the terminal coupling portion 53N of the negative electrode connecting plate 53 has a coupling portion through hole 53Q through which the negative electrode male screw portion 52B of the negative electrode terminal portion 52 is inserted.

On the other hand, the negative electrode terminal portion 52 includes a rectangular box-shaped leg portion 52L and a bolt-shaped negative electrode male screw portion 52B protruding from the vicinity of the center of the leg portion 52L (see FIGS. 4 and 6). Among these, the negative electrode male screw portion 52B has a bolt shape having a second axis AX2 orthogonal to the lid outer surface 11F of the sealing lid 11. The negative male screw portion 52B is inserted through the coupling portion through hole 53Q of the negative electrode connecting plate 53 and the second external connection terminal 72 described above.
Further, the leg portion 52L is housed by being fitted into a concave portion 59 of the second terminal insulating member 56 described below so that the rotational movement of the second axis AX2 in the circumferential direction can be suppressed.

A second terminal insulating member 56 made of an insulating resin is interposed between the negative external terminal member 51 and the sealing lid 11 (see FIG. 4). For this reason, the second terminal insulating member 56 insulates the negative electrode external terminal member 51 from the sealing lid 11.
Similar to the first terminal insulating member 36, the second terminal insulating member 56 has a stepped main body portion 57 that follows the crank shape of the negative electrode connecting plate 53 and a ring-shaped protruding portion 58 that protrudes from the main body portion 57. The protruding portion 58 is inserted into the through hole 11K of the sealing lid 11. Further, a square hole-shaped part dug in the upper part of the main body 57 is defined as a recess 59. The second terminal insulating member 56 is provided with an insulating through hole 56K that penetrates the main body 57 and the protrusion 58.

The second terminal insulating member 56 holds the negative external terminal member 51 (see FIG. 4). Specifically, the main body portion 57 of the second terminal insulating member 56 has a peripheral edge portion 57H that protrudes toward the negative electrode connecting plate 53 so as to surround the peripheral end surface 53E of the negative electrode connecting plate 53 of the negative electrode external terminal member 51. . The peripheral portion 57H prevents the negative electrode connecting plate 53 from moving in the depth direction or the horizontal direction in FIG. Since the negative electrode connecting plate 53 is caulked and fixed to the negative electrode caulking portion 63 as described above, the main body portion 57 of the second terminal insulating member 56 holds this while preventing the negative electrode connecting plate 53 from moving. ing. Further, the leg portion 52 </ b> L of the negative electrode terminal portion 52 described above is fitted and accommodated in the rectangular hole-shaped concave portion 59 of the second terminal insulating member 56. The accommodated leg portion 52 </ b> L is in contact with the terminal coupling portion 53 </ b> N of the negative electrode coupling plate 53 fixed by the negative electrode caulking portion 63, and thus the second terminal insulating member 56 is connected to the negative electrode external terminal member 51. Each of the plate 53 and the negative terminal portion 52 is held.
For this reason, when attaching / detaching the second external connection terminal 72 to / from the negative electrode terminal portion 52, even if torque is applied to the negative electrode terminal portion 52, the rotational movement of the negative electrode external terminal member 51 can be limited.

  Further, the aforementioned gasket 79 is disposed between the sealing lid 11 and the negative electrode inner terminal body 62 of the negative electrode inner terminal member 61 (see FIGS. 4 and 6). The gasket 79 seals between the negative electrode internal terminal member 61 and the sealing lid 11 of the battery case 10 together with the protruding portion 58 of the second terminal insulating member 56. For this reason, mixing of moisture, foreign matter, etc. into the battery case 10 and leakage of the electrolyte from the battery case 10 are prevented.

Next, the movement limiting member 20 made of an insulating resin will be described with reference to FIGS.
The movement restricting member 20 is located on each side of the rectangular plate-shaped main body 23 extending in the first direction DA, and on both sides of the main body 23 in the first direction DA. It has the 1st engaging part 21 which makes a letter shape, and the 2nd engaging part 22 (refer FIG.1, 5). As shown in FIG. 1, the movement limiting member 20 is interposed between the first terminal insulating member 36 and the second terminal insulating member 56 on the sealing lid 11 of the battery case 10. In addition, the movement restricting member 20 causes the second terminal insulating member 56 to move in the positive electrode external terminal member 31 and the first terminal insulating member 36 when the first external connection terminal 71 is attached to and detached from the positive electrode terminal portion 32. Each part is provided with rigidity to such an extent that it can be restricted by engagement between the movement restriction member 20 and the movement restriction member 20 and the first terminal insulating member 36.

  Of these, the main body portion 23 includes a first through hole 24 that is located near the center of the main body portion 23 and is partitioned by a radially provided wall portion, and a second through hole 25 that is located next to the second through hole 25 and has a small-diameter circular hole. Have. Among these, the 1st through-hole 24 is located in 2nd direction DB (upward in FIG. 6) of the safety valve 12 of the sealing lid 11, and becomes a flow path of gas etc. when this safety valve 12 opens. The second through hole 25 is located in the second direction DB (upward in FIG. 6) of the injection hole 13 of the sealing lid 11 and is used when injecting the electrolyte into the battery case 10.

  Moreover, the 1st engaging part 21 is engaging with the 1st terminal insulating member 36, as shown in FIG. Specifically, the two first arm portions 21 </ b> A and 21 </ b> A forming the first engaging portion 21 are arranged close to or in contact with each other so as to sandwich the first terminal insulating member 36. Similarly to the first engaging portion 21 described above, the second engaging portion 22 is also engaged with the second terminal insulating member 56 by the two second arm portions 22A and 22A (see FIG. 1).

  By the way, in the battery 1 of the first embodiment, when the first external connection terminal 71 is attached to and detached from the positive electrode terminal portion 32, the positive electrode external terminal member 31 tends to move in the direction along the lid outer wall surface 11F. Even the first terminal insulating member 36 that is restricted may move along with the positive external terminal member 31 in the direction along the lid outer wall surface 11F. Specifically, the first terminal insulating member 36 may rotate around the first axis AX1 due to co-rotation with the positive electrode terminal portion 32, or rotate around the third axis AX3. .

On the other hand, the battery 1 according to the first embodiment includes the movement limiting member 20 in addition to the first terminal insulating member 36 that holds the positive external terminal member 31. The movement restricting member 20 moves the positive external terminal member 31 and the first terminal insulating member 36 between the second terminal insulating member 56 and the movement restricting member 20, and the movement restricting member 20 and the first terminal insulating member 36. It has a form to be restricted by engagement with the terminal insulating member 36. Specifically, as described above, in the movement restricting member 20, the first engaging portion 21 sandwiches the first terminal insulating member 36, and the second engaging portion 22 sandwiches the second terminal insulating member 56, respectively. (See FIG. 1).
By attaching and detaching the first external connection terminal 71, the first terminal insulating member 36 may try to move such as rotational movement about the first axis AX1 and rotational movement about the third axis AX3. Then, due to the movement of the first terminal insulating member 36, the first terminal insulating member 36 comes into contact with the first arm portions 21 </ b> A and 21 </ b> A of the movement restricting member 20, and the movement restricting member 20 also tries to move. However, the movement restricting member 20 is forced to move largely in the vicinity of the second arm portions 22A and 22A when the vicinity of the first arm portions 21A and 21A tries to move, and eventually the movement in the vicinity of the first arm portion 21A is restricted. Is done. Therefore, the movement of the first terminal insulating member 36 in addition to the movement limiting member 20 is suppressed.

As described above, in the battery 1 according to the first embodiment, in addition to the movement of the first terminal insulating member 36, the movement of the positive external terminal member 31 held therein can be appropriately restricted.
For this reason, when the first terminal insulating member 36 or the positive electrode external terminal member 31 moves in a direction along the lid outer surface 11F of the sealing lid 11, the positive electrode external terminal member 31 and the sealing lid 11 of the battery case 10 are moved. Or the seal between the positive electrode internal terminal member 41 connected to the positive electrode external terminal member 31 and the sealing lid 11 of the battery case 10 can be prevented.

  Further, in the battery 1 of the first embodiment, when the second external connection terminal 72 is attached to and detached from the negative electrode terminal portion 51, the negative electrode external terminal member 51 extends along the lid outer wall surface 11F, like the positive electrode external terminal member 31 described above. In order to move in the direction, even the second terminal insulating member 56 that restricts the movement may move in the direction along the lid outer wall surface 11 </ b> F together with the negative electrode external terminal member 51.

On the other hand, the battery 1 according to the first embodiment includes the above-described movement restricting member 20 in addition to the first terminal insulating member 36 that holds the positive external terminal member 31. The movement restricting member 20 has a form that restricts movement of the negative external terminal member 51 and the second terminal insulating member 56 together with the positive external terminal member 31 and the first terminal insulating member 36.
By attaching and detaching the second external connection terminal 72, the second terminal insulating member 56 may attempt to move such as rotational movement about the second axis AX2 and rotational movement about the fourth axis AX4. Then, due to the movement of the second terminal insulating member 56, the second terminal insulating member 56 comes into contact with the second arm portions 22 </ b> A and 22 </ b> A of the movement limiting member 20 and tries to move the movement limiting member 20. However, when the movement restricting member 20 is about to move in the vicinity of the second arm portions 21A, 22A, the vicinity of the first arm portions 21A, 21A is forced to move greatly, and eventually the movement in the vicinity of the second arm portions 22A, 22A. Is limited. Therefore, the movement of the second terminal insulating member 56 in addition to the movement limiting member 20 is suppressed.

Therefore, in the battery 1 of the first embodiment, in addition to the movement of the second terminal insulating member 56, the movement of the negative external terminal member 51 held therein can be appropriately restricted.
Therefore, when the second terminal insulating member 56 or the negative electrode external terminal member 51 moves in a direction along the lid outer surface 11F of the sealing lid 11, the negative electrode external terminal member 51 and the sealing lid 11 of the battery case 10 are moved. Or a seal between the negative electrode internal terminal member 61 connected to the negative electrode external terminal member 51 and the sealing lid 11 of the battery case 10 can be prevented.

  In the battery 1 of the first embodiment, the first terminal insulating member 36 holds the positive external terminal member 31 in a form that restricts the rotational movement of the positive external terminal member 31, and the movement limiting member 20 The movement that occurs in the first terminal insulating member 36 as the positive external terminal member 31 rotates is limited. That is, the movement restricting member 20 has the first terminal insulating member 36 associated with the rotational movement around the first axis AX1 due to the co-rotation of the positive electrode external terminal member 31, the rotational movement around the third axis AX3, and the like. In addition, rotational movement around the first axis AX1 or the third axis AX3 is limited.

  For this reason, in the battery 1 according to the first embodiment, when the first external connection terminal 71 is attached to and detached from the positive electrode terminal portion 32, even if torque is applied to the positive electrode terminal portion 32, the positive electrode external terminal member 31 rotates and moves. And the movement of the 1st terminal insulating member 36 accompanying this can be restrict | limited appropriately.

  The second terminal insulating member 56 holds the negative external terminal member 51 in a form that restricts the rotational movement of the negative external terminal member 51, and the movement limiting member 20 further rotates the negative external terminal member 51. Accordingly, the movement that occurs in the second terminal insulating member 56 is limited. In other words, the movement limiting member 20 described above also limits the rotational movement of the second terminal insulating member 56 around the second axis AX2 or the fourth axis AX4.

  For this reason, in the battery 1 of the first embodiment, when the second external connection terminal 72 is attached to and detached from the negative electrode terminal portion 52, even if torque is applied to the negative electrode terminal portion 52, the negative electrode external terminal member 51 rotates and moves. And the movement of the 2nd terminal insulating member 56 accompanying this can be restrict | limited appropriately.

Next, a method for manufacturing the battery 1 according to the first embodiment will be described with reference to FIGS.
First, the positive electrode plate 81 and the negative electrode plate 82 are wound on a power generation element 80 that is wound through a separator 83, the positive electrode current collector 42 T of the positive electrode internal terminal member 41 and the negative electrode of the negative electrode internal terminal member 61. Each current collector 62T is welded.

Next, a fixing process for fixing the positive electrode terminal structure 30 to the sealing lid 11 will be described.
In FIG. 6, the positive electrode internal terminal member 41, gasket 79, sealing lid 11, first terminal insulating member 36, positive external terminal member 31, and movement restricting member 20 before caulking constituting the positive electrode terminal structure 30 of the battery 1 are shown. FIG. Among these, the positive electrode internal terminal member 41 is already welded to the positive electrode plate 81 of the power generation element 80 as described above. Further, the positive caulking portion 43 is provided with a deformation hole 43H opened upward in FIG.

  First, the positive electrode terminal portion 32 is inserted through the positive electrode connecting plate 33. Specifically, as shown in FIG. 6, the leg portion 32 </ b> L of the positive terminal portion 32 is fitted into the concave portion 39 of the first terminal insulating member 36. Then, the positive male screw portion 32 </ b> B of the positive terminal portion 32 is inserted into the coupling portion through hole 33 </ b> Q of the positive electrode connecting plate 33.

  Further, as shown in FIG. 6, the positive caulking portion 43 includes the gasket through hole 79 </ b> K of the gasket 79, the through hole 11 </ b> K of the sealing lid 11, the insulating through hole 36 </ b> K of the first terminal insulating member 36, and the positive external terminal member 31. Of the positive electrode connecting plate 33 is inserted through the fixing portion through hole 33 </ b> P in this order, and the front end side thereof protrudes beyond the positive electrode connecting plate 33.

  Next, the diameter-expanding die 91 having a conical tip is moved along the third axis AX3 toward the deformation hole 43H of the positive electrode caulking portion 43 (see FIG. 7). At the same time, a flat metal mold 92 having a flat surface is brought into contact with the lower part (lower part in FIG. 7) of the case coupling portion 42S of the positive electrode internal terminal member 41 so as to contact the sealing lid 11 along the third axis AX3. Move towards. As a result, the positive caulking portion 43 is plastically deformed following the distal end portion of the diameter-expanding die 91, and is formed into a shape that opens in the shape of a cone (conical cylinder).

  Thereafter, the positive crimping portion 43 is deformed using a pressing die 93 (see FIG. 8). Thereby, the positive electrode caulking portion 43 is plastically deformed so that the tip thereof extends outward in the radial direction of the third axis AX3, and presses the positive electrode connecting plate 33. Thereby, the positive electrode terminal structure 30 is fixed on the sealing lid 11 and completed.

Next, the negative electrode terminal structure 50 is also fixed on the sealing lid 11 in the same manner as the positive electrode terminal structure 30 described above.
That is, first, the negative electrode terminal portion 52 is inserted through the negative electrode connecting plate 53 (see FIG. 6). Further, the negative electrode caulking portion 63 is inserted into the gasket through hole 79K of the gasket 79, the through hole 11K of the sealing lid 11, the insulating through hole 56K of the second terminal insulating member 56, and the fixed portion through hole 53P of the negative electrode connecting plate 53. Inserting in this order, the tip side protrudes from the negative electrode connecting plate 53.
Next, similarly to the positive electrode terminal structure 30, the inserted negative electrode caulking portion 63 is plastically deformed using the diameter-expanding die 91, the flat die 92 and the pressing die 93, and the negative electrode connecting plate 53 is attached thereto. Press (see FIGS. 7 and 8). As a result, the negative electrode terminal structure 50 is fixed on the sealing lid 11.

  Furthermore, the movement restricting member 20 is disposed between the positive terminal structure 30 and the negative terminal structure 50 each fixed on the sealing lid 11. Specifically, the first terminal insulating member 36 and the second terminal insulating member 56 are arranged so as to sandwich the first terminal insulating member 36 at the first holding portion 21 and the second holding portion 22 of the movement restricting member 20. In addition, the 1st through-hole 24 and the 2nd through-hole 25 of the movement limitation member 20 are each located above the safety valve 12 and the injection hole 13 arrange | positioned at the sealing lid 11 in FIG.

  After the movement restricting member 20 is disposed on the sealing lid 11, the power generation element 80 is accommodated in the battery case body 18. Further, the sealing lid 11 and the battery case body 18 are welded to form the battery case 10. After injecting an electrolyte (not shown) into the battery case 10 through the injection hole 13 of the sealing lid 11, the injection hole 13 is welded and sealed with an aluminum cap. Thus, the battery 1 according to the first embodiment is completed.

(Embodiment 2)
Next, the assembled battery 100 according to Embodiment 2 of the present invention will be described with reference to FIGS. In addition, although description of the part similar to the above-mentioned Embodiment 1 is abbreviate | omitted or simplified, the same effect is produced about the same part. In addition, the same contents are described with the same numbers.

  The assembled battery 100 according to the second embodiment includes a plurality of batteries 101, a first end plate 191 and a second end plate 196, each of which is made of metal and sandwiches the battery 101, and a second end plate 196 and the battery 101. A resin frame 185 is provided between the two. In the assembled battery 100, the stacking direction DL is a direction in which the plurality of batteries 101 are stacked (the left-right direction in FIG. 9).

Among these, the plate-like first end plate 191 made of metal has a planar first inner side surface 192 that contacts the battery 101 (see FIG. 10). Further, the plate-like second end plate 196 made of metal has a flat second inner side surface 197 that abuts on a resin frame 185 interposed between itself and the battery 101.
The first end plate 191 and the second end plate 196 sandwich the plurality of batteries 101 in the stacking direction DL by an external force from the outside.

  In addition, the resin frame 185 made of an insulating resin is disposed so as to face the case main surface 10F of the adjacent battery 101, and the bottom of the battery 101 (from the main body 186 to the bottom ( 9, 10, and 11, and a flange portion 189 extending so as to wrap around. Among these, the flange part 189 is a form extended only to the battery 101 side adjacent to this in the lamination direction DL. And the front-end | tip part of this flange part 189 is made into the coupling | bond part 189J of a shape which can be couple | bonded with the 1st flange part 129M of the below-mentioned 1st movement limitation member 120M. Therefore, the resin frame 185 is coupled to the first movement restriction member 120M adjacent to each other via the battery 101 on the bottom side of the battery 101 (see FIG. 10).

  The main body 186 includes a first contact surface 187 and a second contact surface 188. Among these, the first contact surface 187 is in contact with the case main surface 10 </ b> F of the battery 101. Further, the first contact surface 187 is provided with a plurality of substantially rectangular strip-shaped recesses 187P extending in parallel to the stacking direction DL and extending in a direction perpendicular to the paper surface in FIG. Surrounded by the recesses 187P and 187P and the battery case 10 (case main surface 10F) of the battery 101, a rectangular flow passage BW through which air can flow is provided.

  On the other hand, the entire planar second contact surface 188 is in contact with the second inner side surface 197 of the second end plate 196. Further, the resin frame 185 is interposed between the battery case 10 of the battery 101 and the second end plate 196 to insulate them from each other.

Similarly to the battery 1 of the first embodiment, the battery 101 includes a rectangular box-shaped battery case 10, a positive electrode terminal structure 30 having a positive electrode external terminal member 31 and a first terminal insulating member 36, and a negative electrode external terminal member 51. And a second terminal insulating member 56 is a wound lithium ion secondary battery including a negative electrode terminal structure 50, a power generation element 80, and an electrolyte solution (not shown) (see FIG. 11). However, a movement limiting member 120 different from that of the first embodiment is provided.
In the assembled battery 100, the battery 101 is formed by arranging a plurality of sealing lids 11 of the battery case 10 in the stacking direction DL facing upward in FIG. 9. For this reason, the positive electrode terminal structure 30 and the negative electrode terminal structure 50 fixed on the sealing lid 11 are both positioned on the upper side in FIG. 9, and the positive electrode terminal structure 30 and the negative electrode of the adjacent batteries 101 and 101. The terminal structure 50 can be connected at a short distance using a plate-like bus bar 170.

  Among them, the battery case 10 includes the sealing lid 11 and the battery case body 18 as in the first embodiment. Further, the battery case 10 has two main case surfaces 10F and 10F that are orthogonal to the stacking direction DL and are parallel to each other (see FIG. 10).

Further, the movement restricting member 120 made of an insulating resin is the same as the first embodiment, in addition to the main body 23, the first engaging portion 21, the second engaging portion 22, and one case main surface 10F of the battery case 10. The plate-like interposition part 126 interposed between the adjacent batteries and the intermediate part 126 extends from the interposition part 126 to the bottom side of the battery 101 (downward in FIGS. 9, 10, and 11). It has a protruding flange portion 129.
The movement restricting member 120 includes a first movement restricting member 120M including a first interposition part 126M that contacts the first end plate 191 and a second movement including a second interposition part 126N interposed between the batteries 101. The restriction member 120N is classified into two types (see FIG. 10). Specifically, the first movement restriction member 120M has a first flange portion 129M that extends only toward the battery 101 in the stacking direction DL, whereas the second movement restriction member 120N has a second flange portion 129M. 129N has a shape extending to both sides in the stacking direction DL.

  Of the movement limiting member 120, the flange portion 129 (the first flange portion 129M and the second flange portion 129N) is a coupling portion 129J having a shape in which the front end portions in the stacking direction DL can be coupled with each other between adjacent leg portions. Yes. For this reason, the movement limiting members 120 adjacent to each other via the battery 101 are coupled to each other on the bottom side of the battery 101 (see FIG. 10).

Further, the interposition part 126 includes a first contact surface 127 and a second contact surface 128. Among these, the first contact surface 127 is in contact with the case main surface 10 </ b> F of the battery 101 or the first inner side surface 192 of the first end plate 191. In addition, the first contact surface 127 is provided with a plurality of substantially rectangular belt-shaped concave portions 127P that are orthogonal to the stacking direction DL and extend in a direction perpendicular to the paper surface in FIG. Surrounded by the recesses 127P and 127P and the battery case 10 (case main surface 10F) of the battery 101, a rectangular flow passage BW through which air can flow is provided.
On the other hand, the planar second contact surface 128 is in contact with the case main surface 10 </ b> F of the battery 101 including the movement restricting member 120.

Furthermore, the interposition part 126 is interposed between the battery cases 10 and between the battery case 10 and the end plate 191 to insulate them from each other.
For example, as illustrated in FIG. 10, in the first battery 101J and the second battery 101K that are adjacent to each other among the batteries 101, the interposition part 126 of the movement limiting member 120 in the first battery 101J includes the first battery 101J and the second battery 101J. It is interposed between the battery 101K. The interposition part 126 insulates the first battery 101J and the second battery 101K from each other.

  That is, the movement limiting member 120 is a dual-purpose member CM that also serves as a separation insulating member that separates and insulates the first battery 101J and the second battery 101K. For this reason, when constructing the assembled battery 100 by arranging the batteries 101 in a row, a separate insulating member for separating and insulating the adjacent batteries 101 (first battery 101J, second battery 101K) is prepared separately. There is no need to alternately arrange the battery 101 and the separation insulating member, and the assembled battery 100 can be easily formed, and the assembled battery 100 can be made inexpensive.

  Furthermore, since the movement restricting member 120 is also used as the separation insulating member, the position of the movement restricting member 120 in the first battery 101J to which it belongs is stabilized. Specifically, the interposition part 126 of the movement limiting member 120 of the first battery 101J is sandwiched between the first battery case 10J of the first battery 101J and the second battery case 10K of the second battery 101K. (See FIG. 10). Thereby, the main body part 23 of the movement restricting member 120 is unlikely to move on the lid outer surface 11F of the sealing lid 11 or to come off from the sealing lid 11. Furthermore, as shown in FIG. 10, since the movement limiting member 120 of the adjacent batteries 101 abuts each other at least one of the sealing lid 11 side and the stacking direction DL, the main body portion 23 is on the lid outer surface 11F. Is difficult to move.

  For this reason, the bus bar 170 (or the first external connection terminal 71 or the second external connection terminal 72) is attached to and detached from the positive electrode terminal portion 32 of the positive electrode external terminal member 31 or the negative electrode terminal portion 52 of the negative electrode external terminal member 51. In some cases, when the first terminal insulating member 36 or the second terminal insulating member 56 is about to move and the movement limiting member 120 that limits these movements is subjected to stress, the movement limiting member 120 may come off. Can be less likely to occur.

Further, the movement restricting member 120 of the first battery 101J described above forms a flow passage BW through which cooling air flows between the interposition part 126 and the second battery case 10K of the second battery 101K.
For this reason, in the assembled battery 100, each of the batteries 101J and 101K can be easily cooled by circulating cooling air between the adjacent first battery 101J and the second battery 101K.

Next, a method for manufacturing the assembled battery 100 according to the second embodiment will be described with reference to FIGS.
First, as in the first embodiment, the positive electrode current collector 42T of the positive electrode internal terminal member 41 and the negative electrode current collector 62T of the negative electrode internal terminal member 61 are welded to the power generation element 80, respectively.

Next, a fixing process for fixing the positive electrode terminal structure 30 to the sealing lid 11 will be described.
In FIG. 12, the positive electrode internal terminal member 41, the gasket 79, the sealing lid 11, the first terminal insulating member 36, the positive external terminal member 31, and the movement restricting member 20 before caulking constituting the positive electrode terminal structure 30 of the battery 1 are shown. FIG. Among these, the positive electrode internal terminal member 41 is already welded to the positive electrode plate 81 of the power generation element 80 as described above. Further, the positive caulking portion 43 is provided with a deformation hole 43H opened upward in FIG.

  First, the positive electrode terminal portion 32 is inserted through the positive electrode connecting plate 33. Specifically, as shown in FIG. 6, the leg portion 32 </ b> L of the positive terminal portion 32 is fitted into the concave portion 39 of the first terminal insulating member 36. Then, the positive male screw portion 32 </ b> B of the positive terminal portion 32 is inserted into the coupling portion through hole 33 </ b> Q of the positive electrode connecting plate 33.

  Further, as shown in FIG. 6, the positive caulking portion 43 includes the gasket through hole 79 </ b> K of the gasket 79, the through hole 11 </ b> K of the sealing lid 11, the insulating through hole 36 </ b> K of the first terminal insulating member 36, and the positive external terminal member 31. Of the positive electrode connecting plate 33 is inserted through the fixing portion through hole 33 </ b> P in this order, and the front end side thereof protrudes beyond the positive electrode connecting plate 33.

Next, the positive caulking portion 43 protruding from the positive electrode connecting plate 33 is deformed by using the diameter expanding die 91, the flat die 92, and the pressing die 93 as in the first embodiment (see FIG. 8). Thereby, the positive electrode caulking portion 43 is plastically deformed so that the tip thereof extends outward in the radial direction of the third axis AX3, and presses the positive electrode connecting plate 33. Thereby, the positive electrode terminal structure 30 is fixed on the sealing lid 11.
The negative electrode terminal structure 50 is also fixed on the sealing lid 11 in the same manner as the positive electrode terminal structure 30 described above.

  After fixing the positive terminal structure 30 and the negative terminal structure 50 on the sealing lid 11, the power generation element 80 is accommodated in the battery case body 18. Further, the sealing lid 11 and the battery case body 18 are welded to form the battery case 10.

After the battery case 10 is formed, the movement restriction member 120 is disposed on the sealing lid 11 between the positive terminal structure 30 and the negative terminal structure 50. Specifically, the first terminal insulating member 36 is disposed at the first holding portion 21 of the movement restricting member 120 and the second terminal insulating member 56 is interposed at the second holding portion 22, and the movement restricting member 120 is interposed. The portion 126 is brought into contact with the case main surface 10F of the battery case 10. Further, the flange portion 129 of the movement restricting member 120 is disposed on the bottom side of the battery case 10 (downward in FIG. 13B).
In addition, the 1st through-hole 24 and the 2nd through-hole 25 of the movement limitation member 20 are each located above the safety valve 12 and the injection hole 13 arrange | positioned at the sealing lid 11 in FIG.
After injecting an electrolyte (not shown) into the battery case 10 through the injection hole 13 of the sealing lid 11, the injection hole 13 is welded and sealed with an aluminum cap. Thereby, the battery 101 is completed.

Next, the plurality of batteries 101 described above are arranged. Specifically, the first contact surface 127 of the interposition part 126 of the movement limiting member 120 and the case main surface 10F exposed from the other battery 101 are brought into contact with each other so that the plurality of batteries 101 are aligned in the stacking direction DL. Line up in a row.
Of the plurality of batteries 101 arranged in a row, the first inner side surface 192 of the first end plate 191 is contacted with the stacking direction DL and the side where the first contact surface 127 of the interposition part 126 of the movement restricting member 120 is exposed. Make contact. In contrast, the second inner side surface 197 of the second end plate 196 is brought into contact with the side where the case main surface 10F is exposed via the resin frame 185.
Thereafter, an external force along the stacking direction DL is applied from the outside of the first end plate 191 and the second end plate 196 to sandwich the plurality of batteries 101 therebetween.
Thus, the assembled battery 100 according to the second embodiment is completed (see FIG. 9).

(Embodiment 3)
A vehicle 200 according to the third embodiment includes a battery pack 210 including the assembled battery 100 described above. Specifically, as shown in FIG. 14, vehicle 200 is a hybrid vehicle that is driven by using engine 240, front motor 220 and rear motor 230 in combination. The vehicle 200 includes a vehicle body 290, an engine 240, a front motor 220, a rear motor 230, a cable 250, an inverter 260, and a battery pack 210 having a rectangular box shape. Among these, the battery pack 210 accommodates the assembled battery 100 in a rectangular box-shaped battery case 211.

Therefore, in the vehicle 200 according to the third embodiment, when the bus bar 170 (or the first external connection terminal 71) is attached to or detached from the positive electrode terminal portion 32 of the positive electrode terminal structure 30, the positive electrode external terminal member 31 and the battery case 10 are attached. The sealing between the sealing lid 11 or the sealing between the positive electrode internal terminal member 41 connected to the positive electrode external terminal member 31 and the sealing lid 11 can be prevented. Further, similarly, when the bus bar 170 (or the second external connection terminal 72) is attached to or detached from the negative electrode terminal portion 52 on the negative electrode side, a seal between the negative electrode external terminal member 51 and the sealing lid 11 or a negative electrode internal terminal is provided. The problem that the seal between the member 61 and the sealing lid 11 becomes insufficient can be prevented.
Thus, the vehicle 200 can be a highly reliable vehicle.

  Further, as described above, the vehicle 200 includes the assembled battery 100 including the movement restricting member 120 that is the dual-purpose member CM. Therefore, the vehicle 200 can be an inexpensive vehicle equipped with the inexpensive assembled battery 100.

(Modification 1)
The vehicle 300 according to the first modification differs from the vehicle 200 according to the third embodiment in that the battery pack 310 including a plurality of the batteries 1 described above is mounted.
Specifically, the battery pack 310 of the vehicle 300 according to the first modification includes a plurality of batteries 1 arranged in a rectangular box-shaped battery case 311 (see FIG. 15). The plurality of batteries 1 are electrically connected in series in the battery pack 310 using a plurality of bus bars 370. Further, between these adjacent battery cases 10, 10, a separation insulating member SM made of an insulating resin, which is a separate member from the movement limiting member 20, is interposed.

  For this reason, in the vehicle 300 according to the first modification, when the bus bar 370 (or the first external connection terminal 71) is attached to and detached from the positive electrode terminal portion 32, the positive electrode external terminal member 31 and the sealing lid 11 of the battery case 10 are connected. It is possible to prevent a problem that the seal between the positive electrode internal terminal member 41 and the sealing lid 11 is insufficient. Further, similarly, when the bus bar 370 (or the second external connection terminal 72) is attached to or detached from the negative electrode terminal portion 52 on the negative electrode side, the seal between the negative electrode external terminal member 51 and the sealing lid 11 or the negative electrode internal terminal The problem that the seal between the member 61 and the sealing lid 11 becomes insufficient can be prevented. Thus, the vehicle 300 according to the first modification can be a highly reliable vehicle.

(Embodiment 4)
Further, the hammer drill 400 of the fourth embodiment is equipped with a battery pack 410 including the assembled battery 100 described above, and is a battery-equipped device having a battery pack 410 and a main body 420 as shown in FIG. Note that the battery pack 410 is accommodated in the bottom portion 421 of the main body 420 of the hammer drill 400.

Therefore, the hammer drill 400 according to the fourth embodiment seals the positive external terminal member 31 and the battery case 10 when the bus bar 170 or the first external connection terminal 71 is attached to and detached from the positive terminal 32 of the assembled battery 100. It is possible to prevent a problem that the seal between the lid 11 or the seal between the positive electrode internal terminal member 41 connected to the positive electrode external terminal member 31 and the sealing lid 11 becomes insufficient. Further, similarly, when the bus bar 170 or the second external connection terminal 72 is attached to or detached from the negative electrode terminal portion 52 on the negative electrode side, the seal between the negative electrode external terminal member 51 and the sealing lid 11 or the negative electrode internal terminal member is used. The problem that the seal between 61 and the sealing lid 11 is insufficient can be prevented.
Thus, the hammer drill 400 can be a highly reliable battery-equipped device.

In addition, as described above, the hammer drill 400 is equipped with the assembled battery 100 including the movement restricting member 120 that is the dual-purpose member CM. Therefore, the hammer drill 400 can be an inexpensive battery-equipped device equipped with the inexpensive assembled battery 100. .
Further, in the assembled battery 100 on which the hammer drill 400 is mounted, the dual-purpose member CM is configured to serve as both the movement limiting member 120 and the separation insulating member SM. Therefore, in the assembled battery 100, when the bus bar 170 or the first external connection terminal 71 is attached to the positive electrode terminal portion 31 or the bus bar 170 or the second external connection terminal 72 is attached to or detached from the negative electrode terminal portion 51, the movement limiting member. It can be set as the hammer drill 400 which made it difficult to produce malfunctions, such as 120 dislodging.

In the above, the present invention has been described with reference to the first, second, third, and fourth embodiments and the first modification. However, the present invention is not limited to the above-described embodiments, and may be appropriately selected without departing from the gist thereof. Needless to say, it can be changed and applied.
For example, in Embodiment 1 and the like, the battery 1 is a lithium ion secondary battery, but may be applied to other secondary batteries, for example, a nickel-hydrogen secondary battery, a nickel cadmium secondary battery, and the like. Moreover, you may apply to a primary battery. Furthermore, in Embodiment 1 and the like, the battery case 10 of the battery 1 is a rectangular battery case, but a battery case having a first electrode terminal member and a second electrode terminal member above the terminal formation surface, for example, a part A battery case having a cylindrical shape including a terminal forming surface may be used.

In Embodiment 1 and the like, the movement restricting member 20 is made of an insulating resin, but can be insulated from the first electrode terminal member, the second electrode terminal member, and the terminal forming portion, for example, insulating ceramics, insulating A metal material coated with a film may be used.
In Embodiment 1 or the like, the movement limiting member 20 has first and second engaging portions that are in close proximity to or in contact with and sandwich the first and second terminal insulating members. It was. However, an appropriate form may be adopted according to the size of the range in which the movement limiting member itself can be moved, the direction in which the movement is allowed, the dimensional tolerance of the first terminal insulating member and the second terminal insulating member, and the like.

  For example, specifically, the first terminal insulating member 536 and the second terminal insulating member 556 are each formed with a protrusion TP that protrudes in a direction connecting the two. On the other hand, what made the form which formed the recessed part which fits these protrusions in the movement limitation member 520 is mentioned (refer FIG. 17). On the contrary, the first terminal insulating member 636 and the second terminal insulating member 656 are formed with recesses, and the movement restricting member 620 is formed in the recesses of the first terminal insulating member 636 and the second terminal insulating member 656. The thing which made the form which formed protrusion TP which fits is mentioned (refer FIG. 18). Further, the shape of the protrusion may be a polygonal shape such as a triangular shape (see FIG. 19) or a pentagonal shape in addition to the rectangular quadrangular shape shown in FIGS.

  In Embodiment 1 or the like, the first electrode terminal member and the second electrode terminal member are all arranged above the terminal formation surface. That is, the positive electrode terminal portion 32 and the positive electrode connecting plate 33 forming the positive electrode external terminal member 31, and the negative electrode terminal portion 52 and the negative electrode connecting plate 53 forming the negative electrode external terminal member 51 are both formed on the outer surface 11 </ b> F of the sealing lid 11. Located above. However, the first electrode terminal member includes, for example, a part that is configured integrally with the first terminal portion and located in the battery case, that is, extends from the battery case and partially It is good also as what is arrange | positioned above a terminal formation surface and becomes a 1st terminal part.

1 is a perspective view of a battery according to Embodiment 1. FIG. It is sectional drawing (AA part of FIG. 1) of the battery concerning Embodiment 1. FIG. FIG. 3 is an enlarged explanatory view (B portion in FIG. 2) of the battery according to the first embodiment. FIG. 3 is an enlarged explanatory view (C portion in FIG. 2) of the battery according to the first embodiment. 3 is a perspective view of a movement restriction member according to Embodiment 1. FIG. FIG. 4 is an explanatory diagram of a battery manufacturing process according to the first embodiment. FIG. 4 is an explanatory diagram of a battery manufacturing process according to the first embodiment. FIG. 4 is an explanatory diagram of a battery manufacturing process according to the first embodiment. It is a perspective view of the assembled battery concerning Embodiment 2. FIG. It is sectional drawing (DD part of FIG. 9) of the assembled battery concerning Embodiment 2. FIG. 6 is a perspective view of a battery according to Embodiment 2. FIG. It is explanatory drawing of the manufacturing process of the assembled battery concerning Embodiment 2. FIG. It is explanatory drawing of the manufacturing process of the assembled battery concerning Embodiment 2. FIG. It is explanatory drawing of the vehicle concerning Embodiment 3, modification 1. FIG. It is explanatory drawing of the vehicle concerning the modification 1. It is explanatory drawing of the hammer drill concerning Embodiment 4. It is explanatory drawing of the battery concerning a deformation | transformation form. It is explanatory drawing of the battery concerning a deformation | transformation form. It is explanatory drawing of the battery concerning a deformation | transformation form.

Explanation of symbols

1 Battery 10 Battery Case 10J First Battery Case (Self Battery Case)
10K second battery case (neighboring battery case)
11 Sealing lid (terminal forming part)
11F outer surface of lid (terminal forming surface)
20, 520, 620, 720 Movement limiting member 31 Positive electrode external terminal member (first electrode terminal member)
32 Positive terminal (first terminal)
32B Positive male screw part (first male screw part)
36, 536, 636, 736 First terminal insulating member 51 Negative external terminal member (second electrode terminal member)
52 Negative terminal (second terminal)
52B Negative electrode male screw part (second male screw part)
56, 556, 656, 756 Second terminal insulating member 71 First external connection terminal 72 Second external connection terminal 100 Battery pack 101 Battery 101J First battery (self battery)
101K second battery (neighboring battery)
120 Movement restriction member (separation insulating member, dual-purpose member)
120M first movement limiting member (separation insulating member, dual-purpose member)
120N Second movement limiting member (separation insulating member, dual-purpose member)
170, 370 Bus bar (first external connection terminal, second external connection terminal)
200,300 Vehicle 400 Hammer drill (battery-equipped equipment)
AX1 1st axis AX2 2nd axis BW Flow path CM Combined member SM Spacing insulation member

Claims (8)

A battery case in which at least a terminal forming portion forming a terminal forming surface is made of metal;
A first electrode terminal member made of a metal material and having a first terminal portion to which the first external connection terminal is connected above the terminal formation surface;
A second electrode terminal member made of a metal material, separated and insulated from the first electrode terminal member, and having a second terminal portion for connecting the second external connection terminal above the terminal forming surface;
It is made of an insulating material and is interposed between the first electrode terminal member and the terminal forming portion to insulate both, and when the first external connection terminal is attached to and detached from the first terminal portion, the terminal formation is performed. Limiting the movement of the first electrode terminal member that occurs in the direction along the surface, holding the first electrode terminal member;
A second terminal insulating member made of an insulating material, interposed between the second electrode terminal member and the terminal forming portion, insulating the both, and holding the second electrode terminal member;
Insulated from the first electrode terminal member, the second electrode terminal member, and the terminal forming portion, and interposed between the first terminal insulating member and the second terminal insulating member on the terminal forming portion. A movement limiting member,
When the first external connection terminal is attached to or detached from the first terminal portion, the movement of the first electrode terminal member and the first terminal insulating member that holds the first electrode terminal member that occur in a direction along the terminal formation surface is performed. ,
A battery comprising: a movement limiting member having a form of limiting by engagement between the second terminal insulating member and itself, and engagement between the second terminal insulating member and the first terminal insulating member. The battery according to claim 1,
The first terminal portion includes a first male screw portion,
The first terminal insulating member restricts rotational movement of the first electrode terminal member when a torque is applied to the first electrode terminal member around a first axis that is an axis of the first male screw portion. And holding the first electrode terminal member,
The movement restricting member is a battery having a form that restricts movement that occurs in the first terminal insulating member as the first electrode terminal member rotates. The battery according to claim 1 or 2,
The second terminal insulating member is
When attaching and detaching the second external connection terminal to and from the second terminal portion, the movement of the second electrode terminal member that occurs in the direction along the terminal forming surface is limited and held,
The movement limiting member is
When attaching and detaching the second external connection terminal to and from the second terminal portion, the movement of the second electrode terminal member and the second terminal insulating member that holds the second electrode terminal member that occur in a direction along the terminal forming surface is performed. ,
A battery having a configuration that is limited by engagement between the first terminal insulating member and itself, and engagement between the first terminal insulating member and the second terminal insulating member. The battery according to claim 3,
The second terminal portion includes a second male screw portion,
The second terminal insulating member restricts rotational movement of the first electrode terminal member when a torque is applied to the second electrode terminal member around a second axis that is an axis of the second male screw portion. And holding the second electrode terminal member,
The movement restricting member is a battery having a form that restricts movement that occurs in the second terminal insulating member as the second electrode terminal member rotates. An assembled battery in which the batteries according to any one of claims 1 to 4 are arranged in a plurality of rows with the terminal forming portions facing in the same direction,
The movement limiting member is
Among the batteries, the self battery and the neighboring battery are interposed between a self battery to which the battery belongs and a neighboring battery located adjacent to at least one of the batteries adjacent to the self battery. A battery pack that is a dual-purpose member that also serves as a separation insulating member that insulates the two. The assembled battery according to claim 5,
The combined member is
As the separation insulating member,
It has a form that constitutes a flow passage for circulating a refrigerant between at least one of the self battery case that is the battery case of the self battery and the adjacent battery case that is the battery case of the adjacent battery. Assembled battery. A vehicle on which the battery according to any one of claims 1 to 4 or the assembled battery according to claim 5 or 6 is mounted. The battery mounting apparatus which mounts the battery of any one of Claims 1-4, or the assembled battery of Claim 5 or Claim 6.

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