JP7176472B2 - power storage device - Google Patents

Description

The present disclosure relates to power storage devices.

The power storage device includes power storage cells. The storage cell is heated by the heater. The heater disclosed in Japanese Unexamined Patent Application Publication No. 2017-069033 (Patent Document 1) is formed in a flat plate shape in which the size in the front and rear direction is larger than the size in the vertical direction in the horizontal direction, and the heating wire is provided on the resin base. formed by

JP 2017-069033 A

During the manufacture of the heater, the base material may have a blank portion where the heater wire is not provided. There is room for improvement in this margin.

An object of the present disclosure is to provide a power storage device capable of protecting a heater wire by effectively using a blank portion.

A power storage device according to the present disclosure includes a power storage cell and a heater for raising the temperature of the power storage cell, the heater including a base material and a heater wire provided on the base material, the heater wire includes a meandering portion that extends meandering from one end side to the other end side of the base material, the base material includes a side portion between the one end side and the other end side, and the side portion is , are folded back toward the opposite side, sandwiching the meandering portion of the heater wire.

According to the power storage device described above, the side portion of the base material is folded back toward the opposite side portion, sandwiching the meandering portion of the heater wire. Therefore, it is possible to effectively utilize the blank portions adjacent to the side portions of the base material. For example, the base material can protect the heater wire, which is easily damaged by friction or the like.

According to the present disclosure, it is possible to effectively utilize the blank portion of the substrate.

It is a figure which shows the vehicle 1 etc. typically. 2 is an exploded perspective view showing a power storage device 2; FIG. 4 is a perspective view showing a part of the power storage module 41. FIG. 4 is an exploded perspective view showing an electricity storage module 41. FIG. 4 is a cross-sectional view showing the configuration of an electric storage module 41 and its surroundings. FIG. 4 is a perspective view schematically showing a heater 48; FIG. 4 is a top view showing part of a heater 48; FIG. 8 is a cross-sectional view of heater 48 along line VIII-VIII of FIG. 7; FIG. FIG. 4 is a top view showing a base material 65A and heater wires 66A before splitting; FIG. 4 is a top view showing a base material 65 and heater wires 66 after division;

A power storage device according to the present embodiment will be described with reference to FIGS. 1 to 10. FIG. Among the configurations shown in FIGS. 1 to 10, the same or substantially the same configurations are denoted by the same reference numerals, and overlapping descriptions are omitted. In addition, in the configurations described in the embodiments, configurations corresponding to configurations described in claims may be written together with the configurations in the claims in parentheses.

FIG. 1 is a diagram schematically showing a vehicle 1 and the like. Vehicle 1 includes a vehicle body 30 . An engine compartment 31 and a passenger compartment 32 are formed in the vehicle body 30 . PCU 5 and rotating electric machine 4 are housed in engine compartment 31 . The vehicle body 30 includes a floor panel 33 , and the floor panel 33 is a metal plate-like member that forms the bottom surface of the vehicle 1 .

Power storage device 2 is provided on the bottom surface of floor panel 33 . Charging inlet 13 is provided on the side surface of vehicle body 30 . A lid 34 is provided on the side surface of the vehicle body 30 , and the charging inlet 13 is exposed to the outside by opening the lid 34 .

FIG. 2 is an exploded perspective view showing the power storage device 2. FIG. The power storage device 2 includes a housing case 40 and a plurality of power storage modules 41 . Storage case 40 includes an under cover 42 and an upper cover 43 . The housing case 40 is made of a metal material, resin, or the like. A plurality of power storage modules 41 are housed in the housing case 40 .

FIG. 3 is a perspective view showing part of the power storage module 41. As shown in FIG. FIG. 4 is an exploded perspective view showing the power storage module 41. As shown in FIG. As shown in FIGS. 3 and 4 , the power storage module 41 is elongated in the vehicle width direction W and includes a plurality of power storage cells 44 and a resin member 45 .

Electric storage cell 44 includes a case 46 and an electrode body 47 . The case 46 is made of a metal material such as aluminum, and accommodates an electrode body 47 and an electrolyte. The case 46 is formed in a rectangular parallelepiped shape that is thin in the vehicle width direction W. As shown in FIG. Case 46 includes a top surface 50 , a bottom surface 51 , major surfaces 52 and 53 , and side surfaces 54 and 55 . The main surface 52 and the main surface 53 are arranged in the vehicle width direction W, and the side surfaces 54 and 55 are arranged in the front-rear direction D. As shown in FIG.

A resin member 45 is arranged between each storage cell 44 . Focusing on the storage cell 44A, the resin member 45A is arranged on the main surface 52 side of the storage cell 44A, and the resin member 45B is arranged on the main surface 53 side. The resin member 45A and the resin member 45B have substantially the same configuration.

The resin members 45A, 45B include a main plate 60, a bottom plate 61, multiple side plates 62, and multiple upper plates 63. As shown in FIG. The main plate 60 is arranged on the main surface 52 . The bottom plate 61 is formed on the lower side of the main plate 60 and arranged on the bottom surface 51 . The bottom plate 61 has a notch 27 . The side plates 62 are arranged on the side surfaces 54 , 55 and the top plate 63 is arranged on the top surface 50 . By attaching the resin member 45A and the resin member 45B to the storage cell 44, the lower surface 51, the main surfaces 52 and 53, and the side surfaces 54 and 55 of the storage cell 44 are covered with the resin members 45A and 45B.

FIG. 5 is a cross-sectional view showing the configuration of power storage module 41 and its surroundings. The power storage device 2 includes a temperature adjustment mechanism 94 that adjusts the temperature of the power storage module 41 . The temperature adjustment mechanism 94 is arranged below the bottom plate 61 .

The temperature adjustment mechanism 94 includes a heater 48 , a cooling member 95 , a first pressing member 97 , a second pressing member 98 , a sheet member 99 , a base member 70 and a heat conducting sheet 28 . The first pressing member 97 includes a first pressing portion 101 and a second pressing portion 102 . The base member 70 has a first mounting portion 71 , a second mounting portion 72 and a third mounting portion 73 .

The cooling member 95 has coolant channels 96 through which coolant for cooling the storage cells 44 flows. The cooling member 95 abuts on the storage cell 44 via the heat conductive sheet 28 . A notch 27 is provided so that a portion of the bottom plate 61 facing the cooling member 95 is exposed.

The sheet member 99 is arranged between the power storage module 41 and the heater 48 . The sheet member 99 is pressed between the power storage module 41 and the heater 48 by being pressed by the first pressing member 97 . The sheet member 99 covers the bottom portion of the electricity storage module 41 so that a closed space S is formed between the electricity storage module 41 and the electricity storage module 41 in the cross section of the electricity storage module 41 .

FIG. 6 is a perspective view schematically showing the heater 48. As shown in FIG. FIG. 7 is a top view showing part of the heater 48. As shown in FIG. FIG. 8 is a cross-sectional view of heater 48 along line VIII--VIII of FIG. Heater 48 includes a substrate 65 and heater wires 66 provided on substrate 65 . A heater 48 heats up the storage cell 44 .

Substrate 65 includes one end side 80 and the other end side 81 . The substrate 65 also includes sides 83 and 84 between one end 80 and the other end 81 . Base material 65 is formed of, for example, a nonwoven fabric.

The heater wire 66 is provided on the base material 65, and the heater wire 66 is attached to the upper surface of the base material 65, for example. The heater wire 66 includes a meandering portion 90 that meanders and extends from one end side 80 to the other end side 81 of the substrate 65 . Heater wire 66 may extend outside substrate 65 beyond one end side 80 . The heater wire 66 is powered by an auxiliary battery (not shown) to generate heat.

Sides 83, 84 of substrate 65 are folded back toward opposite sides 84, 83 to form folded portion 85 (FIG. 7). The folded portion 85 sandwiches the meandering portion 90 of the heater wire 66 with the non-folded portion of the base material 65 . Base material 65 sandwiching heater wire 66 and folded portion 85 are adhered to each other by double-sided tape 91, for example.

Further, the other end side 81 of the base material 65 may be folded back toward the one end side 80 to sandwich the heater wire. When the other end side 81 is folded back, the other end side 81 may be folded back so as to overlap the side portions 83 and 84 , and the side portions 83 and 84 may be folded back so as to overlap the folded other end side 81 . It may be folded.

FIG. 9 is a top view showing the base material 65A and the heater wire 66A before splitting. 66 A of heater wires are arrange|positioned on the base material 65A. A dotted line shown in FIG. 9 is a cutting line of the base material 65A.

FIG. 10 is a top view showing the base material 65 and the heater wire 66 after division. After sewing the heater wire 66A to the base material 65A, the heater 48 is manufactured by cutting the base material 65A along the cutting lines indicated by dotted lines in FIG. Each heater 48 after division includes a margin 87 between the outer shape of the base material 65 and the heater wire arrangement portion where the heater wire 66 is provided. The margin 87 is an area generated in manufacturing the heater 48 to hold the heater wire 66 during sewing and to secure a cutting area when the heater 48 is individually cut.

The heater wire 66 can be protected by folding the side portions 83 and 84 of the base material 65 and sandwiching the heater wire 66 . In the power storage device, the heater wire 66 and peripheral parts may be damaged due to rubbing or the like. In this embodiment, as shown in FIGS. 6 to 8, the heater wire 66 is sandwiched between the side portions 83 and 84 of the substrate, so that the heater wire 66 can be protected. When the other end side 81 of the base material 65 is folded back as shown in FIG. 6, the heater wire 66 can be similarly protected.

Also, when the side portions 83 and 84 are folded back, the margins 87 adjacent to the side portions 83 and 84 are positioned at the folded portion 85 . As shown in FIG. 7, the folded portion 85 not only protects the meandering portion 90 of the heater wire 66, but also contributes to miniaturization of the external size. In this embodiment, the blank space 87 of the base material 65 can be effectively used. Similarly, when the other end 81 of the base material 65 is folded back as shown in FIG. 6, the blank space 87 can be effectively used.

Further, by folding back the margins 87 adjacent to the side portions 83 and 84, it is expected that the heating efficiency of the heater 48 will be improved. Generally, the heater wire 66 is not sewn into the margin 87 of the substrate 65 . Therefore, the area where the heater wires 66 are arranged is limited to a part of the base material 65 and may be smaller than the total area of the base material 65 . When the heater 48 is mounted in the lower region of the storage cell 44 without the margin 87 folded back, the portion of the margin 87 where the heater wire 66 is not arranged may not be able to contribute to the temperature rise of the storage cell 44 .

In this embodiment, the heater 48 is provided by folding back the margin 87 of the base material 65 . As a result, the area of the heater 48 approximates the area of the heater wire 66 . In other words, it is possible to expand the area for arranging the heater wire 66 to the outer shape of the heater 48 . As a result, the temperature raising efficiency per area of the heater 48 can be improved.

Moreover, as shown in FIG. 5 , both the heater 48 and the cooling member 95 may be mounted in the area below the storage cell 44 . If both the heater 48 and the cooling member 95 are mounted in the area below the storage cell 44, it is considered that the area below the storage cell 44 in which the heater 48 can be mounted is reduced. Even in this case, in the present embodiment, it is possible to efficiently raise the temperature of the storage cell 44 in a limited area, so it is expected that the temperature raising efficiency of the heater 48 will be improved.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims, and is intended to include all changes within the meaning and range of equivalents to the claims.

Reference Signs List 1 vehicle 2 power storage device 4 rotary electric machine 13 charging inlet 27 notch 28 heat conductive sheet 30 vehicle body 31 engine compartment 32 vehicle compartment 33 floor panel 34 lid 40 housing case 41 power storage module , 42 under cover, 43 upper cover, 44, 44A storage cell, 45, 45A, 45B resin member, 46 case, 47 electrode body, 48 heater, 50 upper surface, 51 lower surface, 52, 53 main surface, 54, 55 side surface, 60 main plate, 61 bottom plate, 62 side plate, 63 upper plate, 65, 65A base material, 66, 66A heater wire, 70 base member, 71 first mounting section, 72 second mounting section, 73 third mounting section, 80 one end side, 81 other end side, 83, 84 side portions, 85 folded portion, 87 margin, 90 meandering portion, 91 double-sided tape, 94 temperature adjustment mechanism, 95 cooling member, 96 refrigerant flow path, 97 first pressing member, 98 second pressing member, 99 seat member, 101 first pressing portion, 102 second pressing portion, D longitudinal direction, S closed space, W vehicle width direction.

Claims (1)

a storage cell;
a heater for increasing the temperature of the storage cell;
with
The heater includes a base material and a heater wire provided on the base material,
The heater wire includes a meandering portion that meanders and extends from one end side to the other end side of the base material,
The base material includes a side portion between the one end side and the other end side,
The power storage device, wherein the side portion is folded back toward the opposite side portion and sandwiches the meandering portion of the heater wire.

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