WO2017047211A1

WO2017047211A1 - Battery pack and battery module

Info

Publication number: WO2017047211A1
Application number: PCT/JP2016/070563
Authority: WO
Inventors: 祐良山口; 村田　卓也; 木下　恭一
Original assignee: 株式会社豊田自動織機
Priority date: 2015-09-14
Filing date: 2016-07-12
Publication date: 2017-03-23
Also published as: JP2017059299A; JP6620478B2

Abstract

A battery pack 10 is provided with: a battery module 20 which has an array 50 formed of a plurality of battery cells 21 arrayed in one direction; a casing 11 to which the battery module 20 is fixed; a solid heat conduction member 13 which is sandwiched between the array 50 and the casing 11 and which is formed by curing a liquid heat conduction material; and a first partitioning wall 14 and a second partitioning wall 15 which extend in one direction between the battery module 20 and the casing 11 and are positioned so as to sandwich the heat conduction member 13.

Description

Battery pack and battery module

The present invention relates to a battery pack and a battery module.

Conventionally, a battery module in which a plurality of battery cells such as lithium ion secondary batteries are arranged in one direction is known. A battery pack in which such a battery module is fixed to a casing (case) is provided with a heat dissipation structure for releasing heat generated in the battery cells to the casing. For example, the battery module described in Patent Document 1 has a heat transfer plate joined to a case, and a heat conductive layer is provided on a surface facing the case of the heat transfer plate. In the battery pack having this battery module, heat generated in the battery cells is conducted to the case through the heat transfer plate and the heat conductive layer.

JP 2014-116193 A

The heat conductive layer described in Patent Document 1 is formed by curing a curable liquid heat conductive material (TIM: Thermal Interface Material). Thus, when a liquid heat conductive material is used, the heat conductive material has fluidity until the heat conductive material is cured. For this reason, a heat conductive material may flow out in the case other than the area | region which opposes the said opposing surface. In this case, for example, screw holes or the like provided around the region in the case may be filled with the heat conductive material, and it may be difficult to attach the battery module to the case.

The present invention provides a battery pack and a battery module that can prevent the heat conductive material from flowing to an unintended region even when a liquid heat conductive material is used.

A battery pack according to one aspect of the present invention is sandwiched between a battery module having an array formed by arranging a plurality of battery cells in one direction, a casing to which the battery module is fixed, and the array and the casing. A solid heat conductive member formed by curing a liquid heat conductive material, and a first partition wall extending in one direction between the battery module and the housing and sandwiching the heat conductive member And a second partition.

According to this battery pack, the solid heat conduction member is provided in the region defined by the first partition and the second partition. The heat conducting member is formed by curing a liquid heat conducting material. For example, when forming a heat conductive member by applying a liquid heat conductive material to the said area | region, it can suppress that a liquid heat conductive material flows out of the said area | region by the 1st partition and the 2nd partition. Therefore, according to the said battery pack, it can suppress that a liquid heat conductive material flows out to the area | region which is not intended.

The battery module further includes a first plate and a second plate that sandwich the array body in one direction, and an end surface on the housing side of the first plate and the second plate is more than a facing surface facing the housing of the array body. It may be located on the housing side. For example, when a liquid thermosetting material is applied to a region defined by a first partition and a second partition and then the heat conductive material is cured in a state where the battery module is fixed to form a heat conductive member, the first A frame surrounding the liquid heat conductive material is formed by the partition wall, the second partition wall, the first plate, and the second plate. That is, since the liquid heat conductive material is surrounded by the first plate and the second plate in addition to the first partition and the second partition, it is further suppressed that the heat conductive material flows out of the region.

The battery pack further includes a third partition extending in a direction intersecting with one direction, the battery module includes an elastic member provided between the first plate and the array, and the third partition is You may provide between an elastic member and a housing | casing. In this configuration, the heat conduction member can be formed by applying the liquid heat conduction material to the region defined by the first to third partitions. Since the three directions of the region are surrounded by the first to third regions, it is possible to further suppress the liquid heat conductive material from flowing out of the region.

The one end of the first partition may be positioned on the opposite side of the array with respect to the first plate, and the other end of the first partition may be positioned on the opposite side of the array with respect to the second plate. In this case, the first partition wall exists over at least the first plate and the second plate. For this reason, in the frame formed by the first partition, the second partition, the first plate, and the second plate, for example, the gap between the corners formed by the first partition and the first plate can be reduced. Therefore, it can suppress that a heat conductive material flows out of the area | region defined by the said frame from the said clearance gap.

The first partition and the second partition may be integrated with the housing. In this case, the region where the heat conductive material is formed on the housing is easily determined by the first partition and the second partition.

The first partition and the second partition may be integrated with the battery module. In this case, for example, a resin holder that holds the battery cells in the battery module, and the first partition and the second partition can be integrally formed. Thereby, a 1st partition and a 2nd partition can be provided cheaply and easily.

The first partition may be integrated with the casing, and the second partition may be integrated with the battery module. In this case, the region where the heat conductive material is formed on the housing is easily determined by the first partition. Further, for example, by integrally molding a resin holder for holding battery cells and the second partition in the battery module, the second partition can be provided inexpensively and easily.

The first partition may have a plurality of partitions extending along one direction. In this case, in order for the heat conductive material to exceed the first partition, it is necessary to exceed all of the plurality of partitions. Therefore, it can further suppress that a heat conductive material exceeds a 1st partition.

The first partition has a plurality of partitions extending along one direction, a part of the plurality of partitions is integrated with the housing, and the other part of the plurality of partitions is integrated with the battery module. Also good. In this case, in order for the heat conductive material to exceed the first partition, it is necessary to exceed all of the plurality of partitions. Therefore, it can further suppress that a heat conductive material exceeds a 1st partition by the some partition provided in a housing | casing and a battery module. In addition, for example, by integrally molding a resin holder for holding battery cells and a part of the plurality of partition walls in the battery module, the part of the partition walls can be provided inexpensively and easily.

The first partition wall and the second partition wall may be partition members that are separate from the casing and the battery module. In this case, the freedom degree of the material etc. which comprise a 1st partition and a 2nd partition improves.

The battery module includes a heat transfer plate that contacts a main surface that is a surface intersecting in one direction in the battery cell, and the heat transfer plate includes a first main body portion that contacts the main surface, and a housing side of the first main body portion. A second main body portion extending in a direction intersecting the main surface from the end, and the second main body portion may contact the heat conducting member. In this case, the heat generated in the battery cell can be conducted to the heat conducting member via the heat transfer plate, and the heat dissipation of the battery cell can be improved.

A battery module according to another aspect of the present invention is a battery module that is fixed to a housing with a solid heat conductive member formed by curing a liquid heat conductive material, and a plurality of battery cells are arranged in one direction. An array of the battery body, a resin holder for holding the battery cell, a first main body portion that contacts a main surface that is a surface intersecting in one direction in the battery cell, and one end from one end of the first main body portion. A heat transfer plate having a second body portion extending in a direction, and a first plate and a second plate sandwiching the array in one direction, the second body portion being a first main surface in contact with the holder The holder has a first partition wall and a second partition wall, the first partition wall and the second partition wall extend in one direction, and 2 It is provided so as to sandwich the main body portion, and is further away from the array body than the second main surface. Projecting direction, the first plate and second plate protrudes in the direction away from the array than the second major surface.

According to this battery module, the holder has the first partition wall and the second partition wall protruding in a direction away from the array body than the second main surface of the second main body portion, and the first plate and the second plate are the second plate. It protrudes in a direction away from the array rather than the main surface. Accordingly, the first partition, the second partition, the first plate, and the second plate form a frame in which the array protrudes from the surface facing the casing when the battery module is fixed to the casing. For this reason, for example, when fixing a battery module in a housing, after applying a liquid heat conductive material to a predetermined region of the housing, the heat conductive material is cured in a state where the battery module is fixed to the housing. Thus, when the heat conductive material is formed, the liquid heat conductive material can be surrounded by the frame, so that the heat conductive material can be prevented from flowing out of the region. Therefore, by fixing the battery module to the casing, it is possible to suppress the liquid heat conductive material on the casing from flowing out to an unintended region. In addition, since the holder made of resin has the first partition wall and the second partition wall, for example, the holder and the first partition wall and the second partition wall can be integrally formed, so that the first partition wall and the second partition wall can be provided easily and inexpensively. Can do.

According to the present invention, even when a liquid heat conductive material is used, it is possible to provide a battery pack and a battery module that can prevent the heat conductive material from flowing out to an unintended region.

FIG. 1 is a schematic view of a battery pack including the battery module according to the first embodiment. FIG. 2 is an enlarged view of a part of the housing. FIG. 3 is a perspective view of the battery module fixed to the battery pack. FIG. 4 is a schematic end view taken along line IV-IV in FIG. FIG. 5 is a schematic end view taken along the line VV of FIG. FIG. 6 is an exploded perspective view showing an example of a battery cell, a heat transfer plate, and a cell holder. FIG. 7 is a process diagram for explaining the battery pack manufacturing method according to the first embodiment. FIG. 8 is an enlarged view of a part of the housing of the first modification of the first embodiment. FIG. 9 is an enlarged view of a part of the housing of the second modified example of the first embodiment. FIG. 10 is a schematic end view for explaining a third modification of the first embodiment. FIG. 11 is a schematic end view for explaining a fourth modification of the first embodiment. FIG. 12 is a schematic end view for explaining the battery pack of the second embodiment. FIG. 13 is a schematic end view for explaining the battery pack of the third embodiment. FIG. 14 is a schematic end view for explaining a first modification of the third embodiment. FIG. 15 is a schematic end view for explaining a second modification of the third embodiment. FIG. 16 is a schematic end view for explaining the battery pack according to the fourth embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and redundant descriptions are omitted.

(First embodiment)
FIG. 1 is a schematic view of a battery pack including the battery module according to the first embodiment. As shown in FIG. 1, the battery pack 10 includes a housing 11, a junction box 12, and a plurality of battery modules 20.

The housing 11 has a box shape and has a storage space for storing the junction box 12 and the plurality of battery modules 20. The housing 11 includes a square plate-like bottom plate 11a and a top plate 11b provided to face the bottom plate 11a. Moreover, the housing | casing 11 has the plate-shaped front board 11c standing from the periphery of the baseplate 11a, the rear board 11d, and a pair of side plate 11e. When mounted on a vehicle such as a forklift or an automobile, the housing 11 is disposed such that the bottom plate 11a is positioned vertically downward and the top plate 11b is positioned vertically upward. FIG. 1 illustrates a state where one side plate 11e is removed. The other side plate 11e is provided with a plurality of holes 11f, and the junction box 12 and the battery module 20 are attached to the other side plate 11e using these holes 11f. The plurality of holes 11f may be through holes or screw holes. The size of the plurality of holes 11f varies depending on the location of the other side plate 11e.

Hereinafter, in the housing 11, the direction in which the top plate 11b is provided is “up”, the direction in which the bottom plate 11a is provided is “down”, the direction in which the front plate 11c is provided is “front”, and the direction in which the rear plate 11d is provided. Is described as “after”. Further, the direction from the bottom plate 11a to the top plate 11b or the direction from the top plate 11b to the bottom plate 11a is referred to as “direction X being the vertical direction”, and the direction from the front plate 11c to the rear plate 11d or from the rear plate 11d to the front plate 11c. The direction toward the front side is referred to as “direction Y that is the front-rear direction”, and the direction from one side plate 11e toward the other side plate 11e or the direction from the other side plate 11e toward one side plate 11e is referred to as “direction Z that is the lateral direction”. I do.

FIG. 2 is an enlarged view of a part of the housing. As shown in FIG. 2, the battery pack 10 includes a solid heat conducting member 13 and first and

second partition walls

14 and 15 that are spaced apart in parallel in the direction X. As shown in FIGS. 4 and 5 to be described later, the heat conducting member 13, the first partition 14, and the second partition 15 are provided so as to be sandwiched between the battery module 20 and the other side plate 11e. In the first embodiment, the shapes of the first partition 14 and the second partition 15 are substantially the same.

The heat conducting member 13 is a solid layer formed by curing a liquid heat conducting material (TIM). That is, the heat conducting member 13 is a layered cured product of a liquid heat conducting material. A heat conductive material is a material which has high heat conductivity, for example, for example, has a heat conductivity of 1.5 W / m * K or more. The thermal conductivity of the heat conductive material may be 2 W / m · K or more, 2.5 W / m · K, or 3.0 W / m · K or more. Examples of the heat conductive material include polyurethane resin. The solid layer may be a layer having a certain volume and shape, and may be a gel layer. In the first embodiment, the heat conducting member 13 is flattened, but the heat conducting member 13 may not be flattened. In order to flatten the heat conducting member 13, for example, a flattening process such as a doctor blade method may be performed, a predetermined coating apparatus may be used, or the composition of the heat conducting material may be adjusted. The heat conductive member 13 may have adhesiveness.

The heat conducting member 13 is provided on a region R defined by the first partition wall 14 and the second partition wall 15 in the other side plate 11 e of the housing 11. This area | region R is an area | region which opposes the array body 50 (refer FIG. 3) when the battery module 20 is attached to the housing | casing 11 in the other side plate 11e. The length along the direction X of the region R corresponds to the separation distance in the direction X of the first partition wall 14 and the second partition wall 15, and the length along the direction Y of the region R is equal to the first partition wall 14 and the second partition wall 14. This corresponds to the length of the partition 15 along the direction Y. In other words, both ends of the region R in the direction X and both ends in the direction Y are defined by the first partition 14 and the second partition 15. The length along the direction Y of the region R may correspond to a separation distance along the direction Y between the first bracket 23 and the second bracket 24 shown in FIGS. 3 and 4 described later (see FIG. 9). . That is, both ends in the direction Y of the region R may be defined by the first bracket 23 and the second bracket 24.

The first partition wall 14 and the second partition wall 15 are integrated with the housing 11 and project from the housing 11 toward the battery module 20. Specifically, the first partition 14 and the second partition 15 are provided on the other side plate 11e, and project from the other side plate 11e toward the one side plate 11e. The first partition wall 14 and the second partition wall 15 have a substantially rectangular parallelepiped shape extending along the direction Y. The first partition 14 is located above the heat conducting member 13, and the second partition 15 is located below the heat conducting member 13. In the other side plate 11e, a hole 11f used for attaching the junction box 12 is provided above the first partition wall 14, and a second bracket 24 described later is attached to the left side of the heat conducting member 13 and the like. A hole 11f used for the purpose is provided.

The thickness of the first partition wall 14 and the second partition wall 15 is larger than the thickness of the heat conducting member 13. Moreover, the length along the direction Y of the 1st partition 14 and the 2nd partition 15 is less than the length along the direction Y of the battery module 20, and it is in the direction Y of the array body 50 (refer FIG. 3) mentioned later. It is more than the length along.

As shown in FIG. 1, the junction box 12 is provided at a corner portion formed by the top plate 11b and the front plate 11c in the accommodation space. The junction box 12 accommodates a terminal block 12a, a relay (not shown), and the like. The terminal block 12a includes a plurality of connecting portions (not shown) to which cable terminals and the like are connected. The junction box 12 is connected to the battery module 20 via cables C1 to C3 and the like.

The plurality of battery modules 20 are arranged along the direction X at the rear of the accommodation space, and are arranged along the direction X at the front of the accommodation space. In the first embodiment, the number of battery modules 20 in the accommodation space is five. The number of battery modules 20 arranged behind the housing space is three, and the number of battery modules 20 arranged forward is two. A junction box 12 is provided above the battery module 20 disposed in front.

FIG. 3 is a perspective view of the battery module fixed to the battery pack. FIG. 4 is a schematic end view taken along line IV-IV in FIG. FIG. 5 is a schematic end view taken along the line VV of FIG. As shown in FIGS. 3 to 5, the battery module 20 includes an array 50 in which a plurality of battery cells 21 are arranged in the direction Y, a plurality of heat transfer plates 22, and a first bracket (first plate). 23, a second bracket (second plate) 24, an elastic member 25, and a control device 26. The battery module 20 of the first embodiment includes seven battery cells 21, and each battery cell 21 is held by a cell holder (holder) 31. For this reason, the array body 50 is configured by arranging the seven battery cells 21 respectively held in the cell holder 31 along the direction Y.

FIG. 6 is an exploded perspective view showing an example of a battery cell, a heat transfer plate, and a cell holder. As FIG. 6 shows, the battery cell 21 is secondary batteries, such as a lithium ion battery or a nickel hydride storage battery, for example. The battery cell 21 has a substantially rectangular parallelepiped shape, and has a pair of main surfaces 21a that are rectangular surfaces that intersect the direction Y, and four side surfaces 21b that are rectangular surfaces. The battery cell 21 has a first terminal T1 and a second terminal T2 to be connected to an external device or another battery cell 21. In the following, the surface facing the housing 11 in the array 50 formed by arranging a plurality of battery cells 21 is referred to as a facing surface 50a.

As shown in FIG. 4, the heat transfer plate 22 is a metal or alloy member that is alternately arranged with the plurality of battery cells 21 in the direction Y and has higher thermal conductivity than the cell holder 31. The heat transfer plate 22 is a plate-shaped member having an L-shaped cross section that contacts the main surface 21 a of the battery cell 21 exposed from the cell holder 31. The heat transfer plate 22 is a member for adjusting the temperature of the battery cell 21 by conducting heat generated in the battery cell 21 to the outside. The heat transfer plate 22 includes a first main body portion 22a that contacts the main surface 21a, and a second main body portion 22b that extends in one direction Y from one end of the first main body portion 22a. As shown in FIG. 4, the first main body portion 22 a contacts both the battery cells 21 adjacent in the direction Y, and is arranged so as to reduce the temperature difference between the battery cells 21.

As shown in FIGS. 4 to 6, the second main body portion 22 b comes into contact with a side surface portion 33 of the cell holder 31 described later and is exposed from the cell holder 31. As shown in FIG. 5, the second main body portion 22 b has a first main surface 22 b ₁ that contacts the side surface portion 33 and a second main surface 22 b ₂ that is a surface opposite to the first main surface 22 b _1. . The second main body portion 22b extends along the side surface 21b on the other side plate 11e side in the battery cell 21. Therefore, one end of the first main body portion 22a corresponds to the end on the other side plate 11e side of the first main body portion 22a, and corresponds to the end on the facing surface 50a side of the array 50. In addition, the second main body portion 22 b contacts the heat conducting member 13 when the battery module 20 is attached to the housing 11. Specifically, the second main surface 22 b ₂ is in contact with the heat conducting member 13. Thereby, the heat generated in the battery cell 21 is transmitted to the housing 11 via the heat transfer plate 22 and the heat conducting member 13. The second main body portions 22b may be in contact with each other or may be separated from each other.

As shown in FIGS. 5 and 6, the cell holder 31 has a frame shape into which the battery cell 21 is fitted, and is a member that can surround and hold the side surface 21 b of the battery cell 21. The cell holder 31 is composed of a resin molded member. The cell holder 31 has an opening 32 that allows contact between the main surface 21a of the battery cell 21 and the first main body portion 22a of the heat transfer plate 22 when the battery cell 21 is fitted. Further, the cell holder 31 includes

side surface portions

33 and 34 that define the opening 32, a bottom surface portion 35, and a partition portion 36. The side surface portion 33 is a portion that faces the second main body portion 22b when the battery cell 21 and the first main body portion 22a of the heat transfer plate 22 come into contact with each other. The side surface portion 34 is a portion facing the side surface portion 33 with the opening 32 interposed therebetween. The bottom surface portion 35 is a portion that connects one end sides of the

side surface portions

33 and 34. The partition portion 36 is a portion that connects the other end sides of the

side surface portions

33 and 34. At both ends in the direction Z of the bottom surface portion 35, insertion holes 35a into which a connecting member 43 described later is inserted are provided. The partition portion 36 is provided with a terminal accommodating portion 36a that accommodates the first terminal T1 and the second terminal T2 of the battery cell 21, respectively. Further, the partition portion 36 is provided with two insertion holes 36b through which a connecting member 43 described later is inserted.

3 and 4, the first bracket 23 and the second bracket 24 are made of a highly rigid material, for example, a metal such as iron. The first bracket 23 and the second bracket 24 attach a restraining load to the array body 50 by sandwiching the array body 50 on both sides in the direction Y. The first bracket 23 and the second bracket 24 also fix the battery module 20 to the housing 11 of the battery pack 10. The first bracket 23 is disposed on one side in the direction Y in the array 50. The second bracket 24 is disposed on the other side in the direction Y in the array 50. Each of the first bracket 23 and the second bracket 24 has a clamping part 41 and an attachment part 42.

The clamping part 41 is a substantially rectangular flat plate. The clamping part 41 of the first bracket 23 and the clamping part 41 of the second bracket 24 are connected by a connecting member 43 such as a bolt, for example. The holding portions 41 are connected to each other by a connecting member 43 so that a force is applied so as to approach each other in the direction Y. Thereby, the clamping parts 41 apply a restraining load in the direction Y to the plurality of battery cells 21. An end of the sandwiching portion 41 on the housing 11 side projects in the direction Z from the second main surface 22b ₂ of the second main body portion 22b to the housing 11 side. In other words, the end of the clamping portion 41 projecting in a direction away from the facing surface 50a of the array 50 than the second major surface 22b ₂ in the direction Z.

The attachment portion 42 is a substantially rectangular flat plate extending from the end on the housing 11 side of the sandwiching portion 41 to the side opposite to the array body 50. A plurality of holes 42 a penetrating along the direction Z are provided in the attachment portion 42. The mounting portion 42 is mounted so as to sandwich the heat conducting member 13 on the other side plate 11e in the direction Y by a bolt 44 inserted through the hole 42a and screwed into the hole 11f. A housing 11 side of the mounting portion 42, the end surface 42b in contact with the casing 11 is located in the housing 11 side of the second main surface 22b ₂ of the second body portion 22b. Offset D1 in the direction Z of the second main surface 22b ₂ of the end face 42b and second body part 22b is, for example, about 1 mm. Since the end surface 42b is located closer to the housing 11 than the second main body 22b, the end surface 42b is naturally located closer to the housing 11 than the facing surface 50a of the array 50.

The elastic member 25 is a plate-like member provided between the first bracket 23 and the array body 50. The elastic member 25 is made of an elastically deformable material such as rubber and resin sponge. In general, since the battery cell 21 expands as the usage period of the battery cell 21 increases, the elastic member 25 absorbs the expansion of the battery cell 21 in the battery module 20. The end face 42 b of the attachment portion 42 is located closer to the housing 11 than the elastic member 25. The offset D2 in the direction Z between the end surface 42b and the elastic member 25 is substantially the same as the total thickness of the side surface portion 33 of the cell holder 31, the second main body portion 22b of the heat transfer plate 22, and the heat conducting member 27.

The control device 26 is a device that performs various controls (for example, discharge control or temperature control) regarding the battery module 20, and is provided on the battery cell 21 and connected to the battery cell 21. The control device 26 includes a central processing unit (CPU), an electronic control unit (ECU), and the like.

Next, the battery pack manufacturing method according to the first embodiment will be described with reference to FIG. FIG. 7 is a process diagram for explaining the battery pack manufacturing method according to the first embodiment.

As shown in FIG. 7, first, the battery cell 21 and the like are assembled (step S1). In step S 1, the battery cell 21 is incorporated into the cell holder 31. Thereby, the battery cell 21 is held by the cell holder 31. In step S 1, the heat transfer plate 22 is brought into contact with the main surface 21 a of the battery cell 21, and the second main body portion 22 b of the heat transfer plate 22 is disposed on the side surface portion 33 of the cell holder 31.

Next, the plurality of battery cells 21 are arranged and restrained (step S2). In step S2, the plurality of battery cells 21 incorporated in the cell holder 31 in step S1 are arranged along a direction (one direction) intersecting the main surface 21a. At this time, the first main body portion 22 a of the heat transfer plate 22 is sandwiched between the adjacent battery cells 21. After arranging the plurality of battery cells 21, the arranged plurality of battery cells 21 are sandwiched in one direction by the first bracket 23 and the second bracket 24. At this time, the elastic member 25 is sandwiched between the sandwiching portion 41 of the first bracket 23 and the battery cell 21 located adjacent to the sandwiching portion 41. And the 1st bracket 23 and the 2nd bracket 24 are connected using the connection member 43, and the restraint load along one direction is added with respect to the some battery cell 21 arranged. Thereby, the array body 50 formed by arranging a plurality of battery cells 21 is provided.

Next, the battery cell 21 is self-discharged (step S3). In step S3, first, the electromotive forces of the constrained battery cells 21 are each measured by a tester. Specifically, the electromotive force of the battery cell 21 is measured by connecting a tester to the first terminal T1 and the second terminal T2 of the battery cell 21. After the self-discharge of the battery cell 21 is started, the array body 50 is left as it is. For example, the battery cell 21 spontaneously discharges by allowing the array 50 to stand in an air atmosphere and at normal temperature and pressure for 1 day or more and 5 days or less. In the first embodiment, the array 50 is left for about 2.5 to 3 days.

Next, after the self-discharge of the battery cell 21 is completed, the control device 26 and the like are attached to the array 50 (step S4). In step S4, the battery cells 21 are electrically connected to each other by, for example, a bus bar, and the control device 26 is attached to be electrically connected to the battery cells 21. Thereby, the battery module 20 shown in FIG. 2 is manufactured.

Next, a liquid heat conductive material (TIM) is applied on the casing 11 (step S5). In step S4, a heat conductive material is applied to the region R of the other side plate 11e of the housing 11. At this time, the housing 11 is allowed to stand to suppress the heat conduction material from flowing out of the region R.

Next, the battery module 20 is fixed to the housing 11 (step S6). In step S6, as shown in FIG. 5, the second main body portion 22b of the heat transfer plate 22 of the battery module 20 is sandwiched in the direction X by the first partition wall 14 and the second partition wall 15 and applied onto the housing 11. The battery module 20 is fixed to the housing 11 so as to be in contact with the heat conduction material. At this time, as shown in FIG. 4, the battery module 20 is arranged on the housing 11 so that the heat conductive material is sandwiched in the direction Y by the sandwiching portions 41 of the first bracket 23 and the second bracket 24. Thereby, in step S6, the region R is defined by the frame formed by the first partition 14, the second partition 15, the first bracket 23, and the second bracket 24, and the heat conduction material flows out from the region R. Suppress. And by curing the thermally conductive material, the heat conducting member 13 in contact with the second major surface 22b ₂ of the second body portion 22b in the region R is formed. In step S 6, the sandwiching portion 41 may be in contact with the heat conducting member 13 or may be separated from the heat conducting member 13. In step S6, the battery pack 10 shown in FIG. 1 is manufactured by fixing the plurality of battery modules 20 to the housing 11 by the method described above.

According to the battery pack 10 of the first embodiment using the battery module 20 described above, the solid heat conductive member 13 can be provided in the region R defined by the first partition wall 14 and the second partition wall 15. . The heat conducting member 13 is formed by curing a liquid heat conducting material. Therefore, as described above, when the heat conductive member 13 is formed by applying the liquid heat conductive material to the region R, the liquid heat conductive material is out of the region R, particularly in the direction, by the first partition wall 14 and the second partition wall 15. It is possible to suppress the flow out of the region beyond the first partition 14 and the region beyond the second partition 15 in X. For this reason, for example, it is possible to prevent the heat conductive material from flowing into the holes 11 f provided above the first partition wall 14, and to prevent the junction box 12 from being difficult to attach to the housing 11. Therefore, according to the said battery pack 10, it can suppress that a liquid heat conductive material flows out to the area | region which is not intended.

Further, the battery module 20 includes a first bracket 23 and a second bracket 24 that sandwich the array body 50 in the direction Y, and end surfaces 42b of the first bracket 23 and the second bracket 24 are opposed surfaces 50a of the array body 50. It is located closer to the housing 11 side. In this case, after a liquid thermosetting material is applied to the region R defined by the first partition wall 14 and the second partition wall 15 in the housing 11, the heat conductive material is cured and heated in a state where the battery module 20 is fixed. When the conductive member 13 is formed, a frame surrounding the liquid heat conductive material is formed by the first partition 14, the second partition 15, the first bracket 23, and the second bracket 24. That is, since the liquid heat conductive material is surrounded by the first bracket 23 and the second bracket 24 in addition to the first partition wall 14 and the second partition wall 15, the region R in the direction Y by the first bracket 23 and the second bracket 24. The heat conduction material is prevented from flowing out. Therefore, it is possible to further suppress the liquid heat conductive material from flowing out to an unintended region.

Also, the first partition 14 and the second partition 15 are integrated with the housing 11. In this case, for example, the region R where the liquid heat conductive material is applied to the housing 11 is easily determined.

The battery module 20 includes a heat transfer plate 22 that contacts the main surface 21a of the battery cell 21, and the heat transfer plate 22 includes a first main body portion 22a and a second main body portion 22b, and the second main body. The part 22 b contacts the heat conducting member 13. In this case, the heat generated in the battery cell 21 can be conducted to the heat conducting member 13 via the heat transfer plate 22, and the heat dissipation of the battery cell 21 can be improved.

FIG. 8 is an enlarged view of a part of the housing of the first modified example of the first embodiment. As shown in FIG. 8, the first modification is different from the first embodiment in that the battery pack 10 further includes a third partition wall 61. Specifically, the third partition wall 61 is provided behind the region R in the other side plate 11e of the housing 11A. Further, the third partition wall 61 is provided between the first partition wall 14 and the second partition wall 15 in the direction X. The third partition wall 61 is provided so as to be positioned between the elastic member 25 and the housing 11A when the battery module 20 is fixed to the housing 11A. The third partition wall 61 is integrated with the housing 11A and has a substantially rectangular parallelepiped shape that protrudes from the housing 11A toward the battery module 20 and extends along the direction X. The thickness of the third partition wall 61 is larger than the thickness of the heat conducting member 13. Further, the thickness of the third partition wall 61 is substantially the same as or larger than the thickness of the first partition wall 14 and the thickness of the second partition wall 15. The length of the third partition wall 61 is, for example, less than the separation distance in the direction X between the first partition wall 14 and the second partition wall 15 and is not less than the length of the heat conducting member 13 in the direction X. The third partition wall 61 may be provided so as to overlap the elastic member 25 when the battery module 20 is attached to the housing 11.

In the first modified example, the same effect as that of the first embodiment is achieved. Further, as shown in FIG. 8, a liquid heat conductive material is applied to a region R defined by the first partition wall 14, the second partition wall 15, and the third partition wall 61 on the housing 11 to heat the heat transfer member 13. Can be formed. Since the three directions of the region R are surrounded by the first partition wall 14, the second partition wall 15, and the third partition wall 61, the liquid heat conductive material exceeds the third partition wall 61 outside the region R, particularly on the housing 11. Flowing out to the area can be suppressed. Therefore, it is possible to further suppress the liquid heat conductive material from flowing out to an unintended region. Further, when the battery module 20 is attached to the housing 11, an offset D 2 is generated between the elastic member 25 and the housing 11. Here, the offset D 2 can be filled by providing the third partition wall 61 so as to overlap the elastic member 25. Thereby, it can suppress that a liquid heat conductive material flows out to the area | region which is not intended further.

FIG. 9 is an enlarged view of a part of the housing of the second modified example of the first embodiment. As shown in FIG. 9, the second modification is different from the first embodiment in that the lengths of the first partition 14 and the second partition 15 along the direction Y are different. Specifically, the length along the direction Y of the first partition 14A is larger than the length along the direction Y of the first partition 14 of the first embodiment. Similarly, the length along the direction Y of the second partition 15A is larger than the length along the direction Y of the second partition 15 of the first embodiment. In FIG. 9, when the battery module 20 is fixed to the housing 11, the position where the clamping part 41 of the first bracket 23 is arranged is the area 62, and the position where the clamping part 41 of the second bracket 24 is arranged is the area. 63. In this case, each of the first partition wall 14 A and the second partition wall 15 A extends from the front side of the region 63 to the rear side of the region 62. In other words, one end of the first partition 14 A is positioned on the opposite side of the array 50 with respect to the first bracket 23, and the other end of the first partition 14 A is opposite to the array 50 on the second bracket 24. Located on the side. Similarly, one end of the second partition 15 A is positioned on the opposite side of the array 50 with respect to the first bracket 23, and the other end of the second partition 15 A is on the opposite side of the array 50 with respect to the second bracket 24. Located in.

In the second modification, the same effects as those of the first embodiment are achieved, and the outflow of the liquid heat conductive material in the direction X outside the region R is further suppressed by the first partition wall 14A and the second partition wall 15A. Is done. Specifically, the first partition wall 14A and the second partition wall 15A exist in at least the first bracket 23 and the second bracket 24 in the direction Y, and the direction Y of the first partition wall 14 and the second partition wall 15 in the first embodiment. Longer than the length along. For this reason, in the frame formed by the first partition wall 14A, the second partition wall 15A, the first bracket 23, and the second bracket 24, the gaps at the corners can be reduced. Can be prevented from flowing out.

FIG. 10 is a schematic end view for explaining a third modification of the first embodiment. As shown in FIG. 10, the third modification is different from the first embodiment in that the number of first and second partitions is different. Specifically, the first partition wall 14 B has substantially rectangular

parallelepiped partition walls

64 and 65 extending along the direction Y. The

partition walls

64 and 65 are integrated with the casing 11 and are separated from each other in the direction X in parallel. Similarly, the second partition wall 15 B includes substantially rectangular

parallelepiped partition walls

66 and 67 extending along the direction Y. The

partition walls

66 and 67 are integrated with the housing 11 and are separated from each other in parallel in the direction X. Accordingly, in the direction X, gaps are formed between the

partition walls

64 and 65 and between the

partition walls

66 and 67, respectively.

In the third modified example, the same effects as those of the first embodiment are achieved. Here, in the third modification, for example, in order for the heat conductive material applied to the region R to exceed the first partition 14B, it is necessary to exceed both the

partitions

64 and 65. Therefore, the plurality of partition walls 64 to 67 provided in the housing 11 can further suppress the heat conductive material applied to the region R from flowing out of the region R beyond the first partition wall 14B and the second partition wall 15B.

In the third modification, the number of partition walls constituting the first partition wall 14B and the second partition wall 15B is not limited. For example, the number of the first partition walls 14B and the second partition walls 15B may be three or more. Further, the number of partition walls constituting the first partition 14B and the number of partition walls constituting the second partition 15B may be different from each other. In this case, the number of the partition walls configuring the first partition wall 14B or the number of the partition walls configuring the second partition wall 15B may be one.

FIG. 11 is a schematic end view for explaining a fourth modification of the first embodiment. As shown in FIG. 11, the fourth modification is different from the first embodiment in that the battery pack 10 includes a bag 68 and a heat conductive material 69 instead of the heat conductive member 13. Specifically, the bag 68 is disposed between the first partition wall 14 and the second partition wall 15 in the direction X and between the battery module 20 and the housing 11 in the direction Z. The bag 68 is sealed, and the bag 68 is filled with a liquid heat conductive material 69. The bag 68 contacts the housing 11 and the second main surface 22b ₂ of the second main body portion 22b. The bag 68 may be in contact with the first partition 14 and the second partition 15, or may not be in contact with the first partition 14 and the second partition 15. The bag 68 is made of a material having a high thermal conductivity. Therefore, the heat generated in the battery cell 21 is conducted to the housing 11 through the heat transfer plate 22, the bag 68, and the heat conductive material 69.

In the fourth modified example, the same effects as those of the first embodiment are achieved. Further, by filling the bag 68 with the liquid heat conductive material 69, the heat conductive material 69 may not be cured. Thereby, since the period which hardens | cures a heat conductive material during manufacture of a battery pack can be abbreviate | omitted, productivity of a battery pack can be improved.

(Second Embodiment)
Next, the battery pack according to the second embodiment will be described. Below, only a different part from 1st Embodiment is demonstrated, and the description which overlaps with 1st Embodiment is abbreviate | omitted.

FIG. 12 is a schematic end view for explaining the battery pack of the second embodiment. As shown in FIG. 12, the second embodiment is different from the first embodiment in that the battery module 20 A has a first partition 71 and a second partition 72. Specifically, the first partition wall and the second partition wall are not provided in the housing 11 B, and the battery module 20 A includes a first partition wall 71 and a second partition wall 72. The first partition wall 71 and the second partition wall 72 have a substantially rectangular parallelepiped shape extending along the direction Y, and are integrated with the battery module 20A. The 1st partition 71 and the 2nd partition 72 protrude toward the housing | casing 11B from the surface of the side part 33 which comprises 31A of cell holders. Specifically, the first partition wall 71 and the second partition wall 72, projecting in a direction away from the array 50 than the second major surface 22b ₂ of the second body portion 22b in the direction Z. The thickness of the first partition wall 71 and the second partition wall 72 is larger than the thickness of the heat conducting member 13. The first partition 71 is provided above the heat conducting member 13 and the second main body portion 22b. The second partition wall 72 is provided below the heat conducting member 13 and the second main body portion 22b. When the battery module 20A is fixed to the housing 11B, the heat conducting member 13 is positioned so as to be sandwiched between the first partition wall 71 and the second partition wall 72 in the direction X. Further, the second main body portion 22 b is located so as to be sandwiched between the first partition wall 71 and the second partition wall 72 in the direction X.

Each cell holder 31 A has protrusions 33 a and 33 b that are provided apart from each other at the side surface portion 33. The protruding portion 33 a is provided on one end side of the side surface portion 33, and the protruding portion 33 b is provided on the other end side of the side surface portion 33. These

protrusions

33a and 33b are made of the same resin as the cell holder 31A, and are integrally formed with the side surface portion 33 and the like of the cell holder 31A. The 1st partition 71 is comprised combining the protrusion part 33a of each cell holder 31A, and the 2nd partition 72 is comprised combining the protrusion part 33b of each cell holder 31A. Adjacent protrusions 33a may be connected in the direction Y or may not be connected. When adjacent protrusions 33a are not connected to each other, a gap between the protrusions 33a may be filled with resin or the like. Similarly, when adjacent protrusions 33b are not connected to each other, a gap between the protrusions 33b may be filled with resin or the like.

According to the battery pack 10A of the second embodiment described above, the battery module 20A has the first partition wall 71 and the second partition wall 72, and the end surfaces 42b of the first bracket 23 and the second bracket 24 have the second main body. Situated in the direction away from the array 50 in the direction Z than the second major surface 22b ₂ parts 22b. Accordingly, the first partition 71, the second partition 72, the first bracket 23, and the second bracket 24 protrude from the facing surface 50a of the array 50 when the battery module 20A is fixed to the housing 11B. , Forming a frame. For this reason, in the case of fixing the battery module 20A in the housing 11B, after the liquid heat conductive material is applied to the region R of the housing 11B, the heat conductive material is fixed in the state where the battery module 20A is fixed to the housing 11B. Since the liquid heat conductive material can be surrounded by the frame when forming the heat conductive member by curing the heat conductive material, it is possible to suppress the heat conductive material from flowing out of the region R. Therefore, according to the battery pack of 2nd Embodiment, it can suppress that a liquid heat conductive material flows out to the area | region which is not intended like 1st Embodiment. In addition, the resin cell holder 31 A that holds the battery cell 21 in the battery module 20 A includes a protrusion 33 a for forming the first partition 71 and a protrusion 33 b for forming the second partition 72. By forming these

protrusions

33a and 33b integrally with the cell holder 31A, the first partition wall 71 and the second partition wall 72 can be provided inexpensively and easily.

(Third embodiment)
Next, a battery pack according to the third embodiment will be described. Below, only a different part from 1st Embodiment and 2nd Embodiment is demonstrated, and the description which overlaps with 1st Embodiment and 2nd Embodiment is abbreviate | omitted.

FIG. 13 is a schematic end view for explaining the battery pack of the third embodiment. As shown in FIG. 13, the third embodiment is different from the first embodiment in that both the housing 11 and the battery module 20 A have a first partition and a second partition. Specifically, in the third embodiment, the casing 11 of the first embodiment and the battery module 20A of the second embodiment are used. In other words, in the third embodiment, a battery pack using the casing 11 provided with the first partition 14 and the second partition 15 and the battery module 20A provided with the first partition 71 and the second partition 72. 10B is configured. In the third embodiment, when the battery module 20A is fixed to the housing 11, the

first partition walls

14 and 71 may be combined as the first partition wall, and the

second partition walls

15 and 72 may be combined as the second partition wall.

The top surface 14a of the first partition 14 of the housing 11 is in contact with the top surface 71a of the first partition 71 of the battery module 20A without a gap. Similarly, the top surface 15a of the second partition 15 of the housing 11 is in contact with the top surface 72a of the second partition 72 of the battery module 20A without a gap. In this case, the thickness of the first partition wall 14 and the second partition wall 15 of the housing 11 may be equal to or greater than the thickness of the heat conducting member 13.

The length along the direction X of the first partition 14 of the housing 11 may be the same as or different from the length along the direction X of the first partition 71 of the battery module 20A. For example, the length along the direction X of the first partition 14 of the housing 11 may be larger than the length along the direction X of the first partition 71 of the battery module 20A. Similarly, the length along the direction X of the second partition 15 of the housing 11 may be the same as or different from the length along the direction X of the second partition 72 of the battery module 20A. For example, the length along the direction X of the second partition 15 of the housing 11 may be larger than the length along the direction X of the second partition 72 of the battery module 20A.

Also with the battery pack 10B of the third embodiment using the battery module 20A described above, the same operational effects as those of the first embodiment can be obtained.

FIG. 14 is a schematic end view for explaining a first modification of the third embodiment. As shown in FIG. 14, the first modification of the third embodiment is different from the third embodiment in the top surface 14a of the first partition 14 of the housing 11 and the first partition 71 of the battery module 20A. It differs from the top surface 71a in that it does not contact each other. Specifically, the top surface 14a of the first partition 14 is in contact with the side surface portion 33 of the cell holder 31A, and the top surface 71a of the first partition 71 is in contact with the other side plate 11e of the housing 11. Further, the side surface 14b of the first partition 14 opposite to the heat conducting member 13 and the side surface 71b of the first partition 71 on the heat conducting member 13 side are in contact with each other. That is, the first partition 14 of the housing 11 is located closer to the heat conducting member 13 than the first partition 71 of the battery module 20A. Similarly, the top surface 15a of the second partition 15 of the housing 11 and the top surface 72a of the second partition 72 of the battery module 20A do not contact each other. The top surface 15a of the second partition 15 is in contact with the side surface portion 33 of the cell holder 31A, and the top surface 72a of the second partition 72 is in contact with the other side plate 11e of the housing 11. Further, the side surface 15b of the second partition 15 opposite to the heat conducting member 13 and the side surface 72b of the second partition 72 facing the heat conducting member 13 are in contact with each other. That is, the second partition 15 of the housing 11 is located closer to the heat conducting member 13 than the second partition 72 of the battery module 20A.

In this modification, the same effect as the third embodiment is exhibited, and the region where the heat conductive material before curing exceeds the

first partition walls

14 and 71 on the housing 11 and the

second partition walls

15 and 72. It is possible to further suppress the flow out to the area beyond. Moreover, since the positioning of the battery module 20A with respect to the housing 11 is facilitated by the

first partition walls

14 and 71 and the

second partition walls

15 and 72, the assembling property of the battery module 20A is improved.

In the first modification of the third embodiment, the first partition 71 of the battery module 20A may be located closer to the heat conducting member 13 than the first partition 14 of the housing 11. Similarly, the second partition wall 72 of the battery module 20 A may be located closer to the heat conducting member 13 than the second partition wall 15 of the housing 11. Further, the

first partition walls

14 and 71 may be separated from each other, and the

second partition walls

15 and 72 may be separated from each other.

FIG. 15 is a schematic end view for explaining a second modification of the third embodiment. As shown in FIG. 15, the second modification of the third embodiment is different from the third embodiment in that a recess is provided in the partition wall of the battery module 20A. Specifically, the first partition 14 of the housing 11 and the first partition 71 of the battery module 20A are configured to be fitted to each other, and the second partition 15 of the housing 11 and the second partition of the battery module 20A are configured. The partition wall 72 is configured to be fitted to each other. More specifically, a recess 81 is formed on the top surface 71 a of the first partition wall 71, and a recess 82 is formed on the top surface 72 a of the second partition wall 72. When the battery module 20 A is fixed to the housing 11, the first partition 14 is inserted into the recess 81, and the second partition 15 is inserted into the recess 82.

In this modification, the same effect as the third embodiment is achieved. In addition, since the first partition wall 14 and the second partition wall 15 serve as marks for fitting into the

recesses

81 and 82, the battery module 20A can be easily positioned with respect to the housing 11, and the assembly property of the battery module 20A is improved. To do.

In the second modification of the third embodiment, a recess may be provided on the top surface 14a of the first partition 14. In this case, the 1st partition 71 is inserted in the said recessed part. Similarly, a recess may be provided on the top surface 15 a of the second partition wall 15. In this case, the second partition wall 72 is inserted into the recess. In addition, the surface of the 1st partition 14 may be in contact with the surface of the recessed part 81, and does not need to contact. Similarly, the surface of the second partition 15 may be in contact with the surface of the recess 82 or may not be in contact therewith.

(Fourth embodiment)
Next, a battery pack according to the fourth embodiment will be described. In the following, only the parts different from the first to third embodiments will be described, and the description overlapping with the first to third embodiments will be omitted.

FIG. 16 is a schematic end view for explaining the battery pack of the fourth embodiment. As shown in FIG. 16, the fourth embodiment is different from the first embodiment in that the housing 11B and the battery module 20 are not provided with the first partition and the second partition. Specifically, the battery pack 10 C includes a first partition 91 and a second partition 92 that are partition members separate from the housing 11 B and the battery module 20.

The first partition wall 91 is a member having a substantially rectangular parallelepiped shape extending in the direction Y and positioned between the housing 11B and the battery module 20 in the direction Z. The second partition wall 92 is a member that has a substantially rectangular parallelepiped shape extending in the direction Y and is positioned between the housing 11 B and the battery module 20 in the direction Z. The first partition wall 91 and the second partition wall 92 are spaced apart in parallel in the direction X, the first partition wall 91 is disposed above the heat conducting member 13 in the direction X, and the second partition wall 92 is aligned in the direction X. In FIG. 2, it is arranged below the heat conducting member 13. In other words, the first partition wall 91 and the second partition wall 92 are arranged so as to sandwich the heat conducting member 13 and the second main body portion 22b of the heat transfer plate 22 in the direction X. Further, the length along the direction Y of the first partition 91 and the second partition 92 is less than the length along the direction Y of the battery module 20 and the length along the direction Y of the array 50 (see FIG. 3). That's it. The 1st partition 91 and the 2nd partition 92 are rubber materials comprised from resin. The thickness of the first partition wall 91 and the second partition wall 92 is larger than the thickness of the heat conducting member 13. The first partition 91 and the second partition 92 are fixed to at least one of the housing 11B and the battery module 20 via an adhesive or the like.

Also with the battery pack 10C of the fourth embodiment using the battery module 20 described above, the same operational effects as those of the first embodiment can be obtained. In addition, since the first partition 91 and the second partition 92 are separate members from the housing 11B and the battery module 20, the degree of freedom of the materials constituting the first partition 91 and the second partition 92 is improved. .

In addition, the battery module and battery pack which concern on this invention are not limited to the said embodiment and modification. Moreover, you may combine the said embodiment and modification suitably. For example, by combining the first embodiment and the second embodiment, one of the first partition and the second partition is integrated with the housing, and the other of the first partition and the second partition is integrated with the battery module. It is good also as an integrated partition. Further, for example, by combining the third modification of the first embodiment and the third embodiment, in the first partition having a plurality of partitions, a part of the partition is integrated with the housing, and the other part is the battery module. It is good also as a partition integrated with. The same applies to the second partition. For example, each of the first to fourth modifications of the first embodiment may be applied to the second to fourth embodiments or other modifications.

Moreover, in the said embodiment, although the 1st bracket 23 and the 2nd bracket 24 have the attaching part 42, it is not restricted to this. For example, the first bracket 23 and the second bracket 24 may have only the clamping part 41. In this case, the first bracket 23 and the second bracket 24 may be fixed to the housing 11 using, for example, an L-shaped metal fitting. Further, in this case, the end surface on the housing side of the sandwiching portion 41 of the first bracket 23 and the second bracket 24 only needs to be positioned on the housing side with respect to the second main body portion 22 b of the heat transfer plate 22.

Moreover, in the said embodiment, although the battery module has the some heat-transfer plate 22 containing the 1st main-body part 22a and the 2nd main-body part 22b, it is not restricted to this. For example, the battery module may not have the heat transfer plate 22.

In addition, the battery pack manufacturing method according to the embodiment includes steps S1 to S6, but is not limited thereto. For example, step S5 may be performed before step S3.

DESCRIPTION OF

SYMBOLS

10,10A-10C ...

Battery pack

11,11A, 11B ... Case, 11e ... Side plate, 11f ... Hole, 13 ... Heat conduction member, 14,71,91 ... First partition, 15,72,92 ...

Second Partition wall

20, 20A ... battery module, 21 ... battery cell, 21a ... main surface, 21b ... side surface, 22 ... heat transfer plate, 22a ... first body part, 22b ... second body part, 25 ... elastic member, 31, 31A ... Cell holder (holder), 33a, 33b ... Projection, 50 ... Array, 50a ... Opposing surface, 61 ... Third partition, 64-67 ... Partition, 68 ... Bag, 69 ... Thermally conductive material, D1, D2 ... Offset, T1... First terminal, T2.

Claims

A battery module having an array formed by arranging a plurality of battery cells in one direction;
A housing to which the battery module is fixed;
A solid heat conductive member sandwiched between the array and the housing and formed by curing a liquid heat conductive material;
A first partition and a second partition that extend along the one direction between the battery module and the housing and are positioned so as to sandwich the heat conducting member;
A battery pack comprising:
The battery module further includes a first plate and a second plate that sandwich the array in the one direction,
2. The battery pack according to claim 1, wherein end surfaces of the first plate and the second plate on the housing side are located closer to the housing than a facing surface of the array body facing the housing.
A third partition extending in a direction intersecting the one direction;
The battery module has an elastic member provided between the first plate and the array,
The battery pack according to claim 2, wherein the third partition is provided between the elastic member and the housing.
One end of the first partition is located on the opposite side of the array with respect to the first plate,
4. The battery pack according to claim 2, wherein the other end of the first partition is located on an opposite side of the array body with respect to the second plate. 5.
The battery pack according to any one of claims 1 to 4, wherein the first partition and the second partition are integrated with the housing.
The battery pack according to any one of claims 1 to 3, wherein the first partition and the second partition are integrated with the battery module.
The first partition is integrated with the housing;
The battery pack according to any one of claims 1 to 4, wherein the second partition wall is integrated with the battery module.
The battery pack according to any one of claims 1 to 7, wherein the first partition has a plurality of partitions extending along the one direction.
The first partition has a plurality of partitions extending along the one direction,
Some of the plurality of partition walls are integrated with the housing,
The battery pack according to any one of claims 1 to 3, wherein other portions of the plurality of partition walls are integrated with the battery module.
The battery pack according to any one of claims 1 to 4, wherein the first partition wall and the second partition wall are partition members that are separate from the casing and the battery module.
The battery module includes a heat transfer plate that contacts a main surface that is a surface intersecting the one direction in the battery cell,
The heat transfer plate includes a first main body portion that contacts the main surface, and a second main body portion that extends in a direction intersecting the main surface from an end of the first main body portion on the housing side,
The battery pack according to any one of claims 1 to 10, wherein the second main body portion is in contact with the heat conducting member.
A battery module fixed to a housing with a solid heat conductive member formed by curing a liquid heat conductive material,
An array formed by arranging a plurality of battery cells in one direction;
A resin holder for holding the battery cells;
A heat transfer plate having a first main body portion that contacts a main surface that is a surface that intersects the one direction in the battery cell, and a second main body portion that extends in one direction from one end of the first main body portion;
A first plate and a second plate sandwiching the array in the one direction,
The second main body portion has a first main surface in contact with the holder, and a second main surface facing the first main surface,
The holder has a first partition and a second partition,
The first partition and the second partition extend along the one direction, are provided so as to sandwich the second main body portion, and protrude in a direction away from the array from the second main surface. ,
The first plate and the second plate protrude in a direction away from the array body than the second main surface,
Battery module.