JP2017076581A - Power storage pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage pack which reduces a force applied to a heat transfer part between a power storage module and a fixed member to which the power storage module is fixed.SOLUTION: A power storage pack 10 includes: power storage modules 21, each of which includes power storage cells 23 arranged in an x axis direction and heat transfer plates 41 connected with the respective power storage cells 23; a side wall 13 of a housing 11 to which the power storage modules 21 are fixed; a heat transfer layer 51 which is disposed between the heat transfer plates 41 and the side wall 13; and a slide member 52 which is disposed between the heat transfer plates 41 and the side wall 13 and has slide surfaces 52a, 52b capable of sliding along the X axis direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a power storage pack.

  There is known a cooling structure in which a deformable heat transfer sheet is provided between a cooling surface of a battery module in which a plurality of battery cells are stacked and a cooling plate (see, for example, Patent Document 1).

JP2013-122817A

  In the cooling structure, for example, the battery cell may expand or contract in the stacking direction of the battery cell due to charging / discharging of the battery cell. In such a case, a force in the battery cell stacking direction is applied to the heat transfer sheet, and the heat transfer sheet may be displaced in the battery cell stacking direction. When the heat transfer sheet is displaced, peeling occurs at the interface between the cooling surface of the battery module and the heat transfer sheet or at the interface between the heat transfer sheet and the cooling plate. When peeling occurs, the contact area between the cooling surface of the battery module and the heat transfer sheet or the contact area between the heat transfer sheet and the cooling plate decreases. Further, if the force applied to the heat transfer sheet is large, the heat transfer sheet may be cracked or broken. As a result, the heat dissipation from the battery module to the cooling plate is reduced.

  An object of one aspect of the present invention is to provide a power storage pack in which a force applied to a heat transfer portion between a power storage module and a fixed member to which the power storage module is fixed is suppressed.

  An electricity storage pack according to one aspect of the present invention includes an electricity storage module including a plurality of electricity storage cells arranged in a first direction and a heat transfer member connected to each of the plurality of electricity storage cells, and the electricity storage module is fixed. A fixed member to be fixed, a heat transfer portion disposed between the heat transfer member and the fixed member, and disposed between the heat transfer member and the fixed member, along the first direction. And a sliding member having a slidable sliding surface.

  In this power storage pack, even if the power storage cell expands or contracts along the first direction, the force in the first direction caused by the expansion or contraction of the power storage cell causes the sliding surface of the sliding member to extend along the first direction. Absorbed by sliding. For this reason, the force in the first direction applied to the heat transfer section is reduced.

  The sliding member may be disposed between the heat transfer section and the fixed member.

  In this case, the force in the first direction is absorbed by the sliding of the sliding surface between the heat transfer section and the fixed member.

  The sliding member may be disposed between the heat transfer unit and the heat transfer member.

  In this case, the force in the first direction is absorbed by the sliding of the sliding surface between the heat transfer section and the heat transfer member.

  The heat transfer section includes a first portion extending along the first direction, and a second portion extending along the first direction and disposed opposite to the first portion. The sliding member may be disposed between the first portion and the second portion.

  In this case, the force in the first direction is absorbed by the sliding of the sliding surface between the first portion and the second portion.

  The sliding member has a first portion having a first sliding surface that is slidable along the first direction, and is slidable along the first direction and faces the first sliding surface. You may provide the 2nd part which has the arrange | positioned 2nd sliding surface.

  In this case, the force in the first direction is absorbed by the sliding of the first sliding surface and the second sliding surface between the first sliding surface and the second sliding surface. Since the 1st sliding surface and the 2nd sliding surface are separated from other elements, such as a heat-transfer part, a heat-transfer member, or a member to be fixed, it is hard to receive influence from other elements. Therefore, it is easy to control so that desired sliding is obtained.

  The sliding member may include a carbon sheet.

  The carbon sheet has a sliding surface. Moreover, since the heat conductivity of a carbon sheet is comparatively high, the heat dissipation from a heat-transfer member to a to-be-fixed member becomes high.

  According to one aspect of the present invention, it is possible to provide a power storage pack in which a force applied to a heat transfer unit between a power storage module and a fixed member to which the power storage module is fixed is suppressed.

It is a perspective view which shows typically the electrical storage pack which concerns on 1st Embodiment. It is a perspective view which shows typically the electrical storage module contained in the electrical storage pack of FIG. FIG. 3 is an exploded perspective view schematically showing a cell holder, a power storage cell, and a heat transfer plate included in the power storage module of FIG. 2. It is sectional drawing of the electrical storage pack along the IV-IV line of FIG. It is sectional drawing of the electrical storage pack which concerns on 2nd Embodiment. It is sectional drawing of the electrical storage pack which concerns on 3rd Embodiment. It is sectional drawing of the sliding member which concerns on a modification. It is sectional drawing of the electrical storage pack which concerns on a modification. It is sectional drawing of the electrical storage pack which concerns on a modification. It is sectional drawing of the electrical storage pack which concerns on a modification.

  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 perspective view schematically showing the electricity storage pack according to the first embodiment. FIG. 1 shows an XYZ orthogonal coordinate system. A power storage pack 10 shown in FIG. 1 has a metal casing 11, for example. A plurality of (four in this example) power storage modules 21 arranged in the Y-axis direction (first direction) and the Z-axis direction (second direction intersecting the first direction) are accommodated in the housing 11. Yes. The casing 11 has a rectangular box shape, a rectangular flat plate-like bottom plate 12, a rectangular flat plate-like side wall 13 standing from the periphery of the bottom plate 12, and a rectangular flat plate shape that closes an opening surrounded by the side wall 13. The top plate 14 is provided.

  FIG. 2 is a perspective view schematically showing a power storage module included in the power storage pack of FIG. 1. FIG. 2 shows the same XYZ orthogonal coordinate system as in FIG. The power storage module 21 shown in FIG. 2 has a plurality of power storage cells 23 (for example, a secondary battery or an electric double layer capacitor such as a lithium ion secondary battery and a nickel hydride storage battery) arranged in the Y-axis direction. . The storage cells 23 are arranged side by side while being held by the cell holder 22. The power storage module 21 includes a heat transfer plate 41 (see FIG. 3) connected to each of the plurality of power storage cells 23. The heat transfer plate 41 is an example of a heat transfer member. The heat transfer plate 41 is made of metal, for example. The heat transfer plate 41 may be in direct contact with the power storage cell 23 or may be connected to the power storage cell 23 via another heat transfer member.

  A pair of end plates 25, 25 are provided at both ends of the storage cells 23 in the storage module 21 in the side-by-side direction (Y-axis direction). The storage cell 23 is restrained in the Y-axis direction by the pair of end plates 25, 25. Bolts B are inserted through both end plates 25, 25. The bolt B is inserted from one end plate 25 toward the other end plate 25 and is screwed into the nut N at a position where the other end plate 25 is inserted. A bracket 24 is provided on each of the end plates 25 and 25. The power storage module 21 is fixed to the side wall 13 by brackets 24 and 24 being fixed to the side wall 13. In the first embodiment, the side wall 13 of the housing 11 is a fixed member to which the power storage module 21 is fixed. The side wall 13 extends along the Y-axis direction and the Z-axis direction.

  FIG. 3 is an exploded perspective view schematically showing a cell holder, a power storage cell, and a heat transfer plate included in the power storage module of FIG. 2. FIG. 3 shows the same XYZ orthogonal coordinate system as in FIGS. 1 and 2. The cell holder 22 shown in FIG. 3 includes a first covering portion 31, a second covering portion 32, a third covering portion 33, a fourth covering portion 34, and a pair of leg portions 36 and 36. Yes.

  The first covering portion 31 is a portion that is formed in a rectangular flat plate shape and covers the bottom portion of the storage cell 23. The second covering portion 32 and the third covering portion 33 are portions standing from both ends in the longitudinal direction (X-axis direction) of the first covering portion 31. The second covering portion 32 and the third covering portion 33 are formed in a rectangular flat plate shape and cover the side surface of the storage cell 23. The fourth covering portion 34 is a portion that is formed in a rectangular flat plate shape and covers a part of one main surface (a surface orthogonal to the thickness direction) of the storage cell 23. The fourth covering portion 34 includes a first end portion 32a (an end portion opposite to the end portion on which the first covering portion 31 is provided) in the longitudinal direction (Z-axis direction) of the second covering portion 32, and a third covering portion. It is connected to the first end 33a (the end opposite to the end where the first covering portion 31 is provided) in the longitudinal direction (Z-axis direction) of the portion 33. As for the 4th coating | coated part 34, the thickness direction corresponds with the juxtaposition direction (Y-axis direction) of the electrical storage cell 23, and a longitudinal direction (X-axis direction) is the opposing direction (the 2nd coating | coated part 32 and the 3rd coating | coated part 33 ( (X-axis direction). A region surrounded by the first covering portion 31, the second covering portion 32, and the third covering portion 33 is a housing portion S in which the storage cell 23 is housed.

  The first end portions 32 a and 33 a in the longitudinal direction (Z-axis direction) of the second covering portion 32 and the third covering portion 33 are connected to the covering portions 32 and 33, and the longitudinal directions of the covering portions 32 and 33. A rectangular flat plate-like projecting portion 35 is provided. In addition, square columnar leg portions 36 are respectively provided at second end portions 32 c and 33 c in the longitudinal direction of the second covering portion 32 and the third covering portion 33.

  The heat transfer plate 41 is formed by bending a metal plate into an L shape, and includes a rectangular flat plate-like main body 42 and a rectangular flat plate-like bent portion 43 that is bent at a right angle from one longitudinal end of the main body 42. And have. The main body 42 is provided in the accommodating portion S in a state adjacent to the power storage cell 23 in the thickness direction of the power storage cell 23. The bent portion 43 covers the outer surface of the third covering portion 33 (the surface opposite to the housing portion S in the thickness direction surface of the third covering portion 33).

  FIG. 4 is a cross-sectional view of the electricity storage pack taken along line IV-IV in FIG. The power storage module 21 shown in FIG. 4 is fixed to the side wall 13 so that the bent portion 43 of the heat transfer plate 41 faces the side wall 13 of the housing 11. Between the bent portion 43 and the side wall 13 of the heat transfer plate 41, a heat transfer layer 51 (TIM layer: Thermal Interface Material layer) and sliding surfaces 52a and 52b that can slide along the Y-axis direction are provided. A sliding member 52 is provided. In the first embodiment, the sliding member 52 is disposed between the heat transfer layer 51 and the side wall 13 of the housing 11.

  The heat transfer layer 51 is an example of a heat transfer unit. The heat transfer layer 51 extends in the Y-axis direction and the Z-axis direction. The heat transfer layer 51 covers the surface (heat transfer surface) of the bent portion 43 of the heat transfer plate 41. The heat transfer layer 51 is in close contact with the bent portion 43 of the heat transfer plate 41 and is in contact with the sliding surface 52 b of the sliding member 52. The heat transfer layer 51 has elasticity. The heat transfer layer 51 may be one or more heat transfer sheets, or may be one or more layers obtained by curing a liquid heat transfer material.

  The sliding member 52 extends in the Y-axis direction and the Z-axis direction. The thickness of the sliding member 52 (size in the X-axis direction) is smaller than the thickness of the heat transfer layer 51. The thickness of the sliding member 52 is, for example, 0.05 mm to 1 mm. The sliding surface 52 a of the sliding member 52 is in contact with the side wall 13 of the housing 11. The sliding surface 52 b of the sliding member 52 is in contact with the heat transfer layer 51. The sliding surfaces 52a and 52b are surfaces having a small friction coefficient. One of the sliding surfaces 52a and 52b may not be slidable. For example, the sliding member 52 may have a non-slidable surface instead of the sliding surface 52b. In that case, the non-slidable surface is in close contact with the heat transfer layer 51. The sliding surfaces 52a and 52b may be slidable in any direction on the YZ plane. For example, the sliding surfaces 52a and 52b may be slidable along the Z-axis direction. In this case, since the sliding surfaces 52a and 52b can also absorb the force in the Z-axis direction, the force in the Z-axis direction applied to the heat transfer layer 51 is suppressed.

  The sliding member 52 is a sliding sheet such as a slip sheet or a slide sheet. An example of the sliding sheet is release paper. The release paper includes a silicone resin layer provided on one or both sides of the substrate. For example, the sliding member 52 includes a silicone resin layer having a sliding surface 52a and a base material having a non-slidable surface instead of the sliding surface 52b. In that case, the non-slidable surface is in close contact with the heat transfer layer 51.

  The sliding member 52 may include a carbon sheet. The carbon sheet has sliding surfaces 52a and 52b. The sliding member 52 may include a base material that supports the carbon sheet. For example, the sliding member 52 may include a carbon sheet having a sliding surface 52a and a base material having a non-slidable surface instead of the sliding surface 52b. Examples of the carbon sheet include a graphite sheet. The thermal conductivity of the carbon sheet is, for example, 700 to 1950 W / (m · K). The thickness of the carbon sheet is, for example, 0.05 mm to 1 mm.

  The size of the sliding member 52 viewed from the thickness direction of the heat transfer layer 51 (X-axis direction, that is, the third direction intersecting the first direction and the second direction) is the same as the size of the heat transfer layer 51 or It is larger than the size of the heat transfer layer 51. In this case, the entire main surface (surface parallel to the YZ plane) of the heat transfer layer 51 can be covered with the sliding member 52.

  An elastic member having elasticity in the Y-axis direction (for example, the elastic member 26 in FIG. 10) may be disposed between the one end plate 25 and the storage cell 23. This elastic member can absorb the force in the Y-axis direction generated by the expansion or contraction of the storage cell 23.

  In the electricity storage pack 10 of the first embodiment, the electricity storage cell 23 may expand or contract along the Y-axis direction due to, for example, charging / discharging of the electricity storage pack 10. In this case, a force in the Y-axis direction is generated, but the force in the Y-axis direction is absorbed by the sliding surfaces 52a and 52b of the sliding member 52 sliding along the Y-axis direction. Therefore, the force in the Y-axis direction applied to the heat transfer layer 51 is reduced. As a result, the heat transfer layer 51 is prevented from peeling from the bent portion 43 of the heat transfer plate 41. Further, cracking or breaking of the heat transfer layer 51 is suppressed. Therefore, a decrease in heat dissipation from the bent portion 43 of the heat transfer plate 41 to the side wall 13 of the housing 11 is suppressed. Therefore, the life of the electricity storage pack 10 is improved. The force in the Y-axis direction increases as the position is farther from both end plates 25, 25 in the Y-axis direction. Therefore, the force in the Y-axis direction is maximized at the center of the power storage module 21 in the Y-axis direction.

  Further, in the first embodiment, since the sliding member 52 is disposed between the heat transfer layer 51 and the side wall 13 of the housing 11, the Y is between the heat transfer layer 51 and the side wall 13 of the housing 11. The axial force is absorbed by the sliding of the sliding surfaces 52a and 52b. In addition, since the distance between the side wall 13 of the housing 11 and the bent portion 43 of each heat transfer plate 41 varies, unevenness may be formed on the surface of the bent portion 43 on the heat transfer layer 51 side. is there. Even in such a case, the main surface of the heat transfer layer 51 on the side of the bent portion 43 absorbs the unevenness, so that the surface of the heat transfer layer 51 on the side of the sliding member 52 is flat. The surface on the sliding member 52 side of the side wall 13 of the housing 11 is also a flat surface. Therefore, it is easy to insert the sliding member 52 between the heat transfer layer 51 and the side wall 13 of the housing 11. Further, the sliding member 52 is less likely to be wrinkled.

  When the sliding member 52 includes a carbon sheet, the heat conductivity of the carbon sheet from the heat transfer plate 41 to the side wall 13 of the housing 11 is high because the carbon sheet has a relatively high thermal conductivity.

(Second Embodiment)
FIG. 5 is a cross-sectional view of the electricity storage pack according to the second embodiment. FIG. 5 shows the same XYZ orthogonal coordinate system as FIG. The power storage pack 10a shown in FIG. 5 includes the same components as the power storage pack 10 shown in FIGS. 1 and 4 except that the positional relationship between the heat transfer layer 51 and the sliding member 52 in the X-axis direction is different. In the electricity storage pack 10 a, the sliding member 52 is disposed between the heat transfer layer 51 and the bent portion 43 of the heat transfer plate 41. The heat transfer layer 51 is in close contact with the side wall 13 of the housing 11 and is in contact with the sliding surface 52 a of the sliding member 52. The sliding surface 52 b of the sliding member 52 is in contact with the bent portion 43 of the heat transfer plate 41.

  In the second embodiment, the same effect as the first embodiment can be obtained. Further, the force in the Y-axis direction is absorbed by the sliding of the sliding surfaces 52a and 52b between the heat transfer layer 51 and the bent portion 43 of the heat transfer plate 41.

(Third embodiment)
FIG. 6 is a cross-sectional view of the electricity storage pack according to the third embodiment. FIG. 6 shows the same XYZ orthogonal coordinate system as FIG. The electricity storage pack 10b shown in FIG. 6 is the electricity storage pack 10 shown in FIGS. 1 and 4 except that the positional relationship between the heat transfer layer 51 and the sliding member 52 in the X-axis direction and the structure of the heat transfer layer 51 are different. With the same components. In the electricity storage pack 10b, the heat transfer layer 51 includes a first portion 511 that extends along the Y-axis direction, and a second portion 512 that extends along the Y-axis direction and is opposed to the first portion 511. have. The sliding member 52 is disposed between the first portion 511 and the second portion 512. The first portion 511 is in close contact with the side wall 13 of the housing 11 and is in contact with the sliding surface 52 a of the sliding member 52. The second portion 512 is in contact with the sliding surface 52 b of the sliding member 52 and is in close contact with the bent portion 43 of the heat transfer plate 41. Even if a plurality of sliding members 52 are disposed between the first portion 511 and the second portion 512 and a portion extending along the Y-axis direction of the heat transfer layer 51 is disposed between the sliding members 52. Good. In this case, the sliding members 52 and the portions of the heat transfer layer 51 that extend along the Y-axis direction are alternately arranged along the X-axis direction.

  In the third embodiment, the same effects as those in the first and second embodiments can be obtained. Further, the force in the Y-axis direction is absorbed between the first portion 511 and the second portion 512 by the sliding of the sliding surfaces 52a and 52b.

(Modified example of sliding member)
FIG. 7 is a cross-sectional view of a sliding member according to a modification. The sliding member 520 shown in FIG. 7 has a first portion 521 having a first sliding surface 521a that can slide along the Y-axis direction, and a first sliding member that can slide along the Y-axis direction. And a second portion 522 having a second sliding surface 522a disposed opposite to the moving surface 521a. The first portion 521 and the first portion 521 extend along the Y-axis direction. The sliding member 520 can be used in place of the sliding member 52 in the electricity storage packs 10, 10a, 10b of the first to third embodiments. In this case, the first portion 521 is in close contact with the side wall 13 of the housing 11. The second portion 522 is in close contact with the bent portion 43 of the heat transfer plate 41.

  The sliding member 520 extends in the Y-axis direction and the Z-axis direction. The thickness of the sliding member 520 (size in the X-axis direction) is smaller than the thickness of the heat transfer layer 51. The thickness of the sliding member 520 is, for example, 0.05 mm to 1 mm. The first sliding surface 521a and the second sliding surface 522a may be slidable in any direction on the YZ plane. For example, the first sliding surface 521a and the second sliding surface 522a may be slidable along the Z-axis direction. In this case, since the first sliding surface 521a and the second sliding surface 522a can also absorb the force in the Z-axis direction, the force in the Z-axis direction applied to the heat transfer layer 51 is suppressed.

  The sliding member 520 is a sliding sheet such as a slip sheet or a slide sheet. The sliding member 520 includes, for example, two release papers whose release surfaces are opposed to each other. For example, the sliding member 520 includes a silicone resin layer having a first sliding surface 521a, a first portion 521 as a first base material, a silicone resin layer having a second sliding surface 522a, and a second base material. As a second portion 522.

  The sliding member 520 may include a plurality of carbon sheets. In this case, each of the first portion 521 and the second portion 522 is a carbon sheet. Each of the two carbon sheets has a first sliding surface 521a and a second sliding surface 522a. A first base material that supports the first carbon sheet may be provided on a surface of the first portion 521 opposite to the first sliding surface 521a. Similarly, a second base material that supports the second carbon sheet may be provided on the surface of the second portion 522 opposite to the second sliding surface 522a.

  In the sliding member 520, the force in the Y-axis direction is absorbed by the sliding of the first sliding surface 521a and the second sliding surface 521b between the first sliding surface 521a and the second sliding surface 521b. . Since the first sliding surface 521a and the second sliding surface 521b are separated from other elements such as the heat transfer layer 51, the heat transfer plate 41, or the side wall 13 of the housing 11, they are hardly affected by other elements. . Therefore, it is easy to control the sliding between the first sliding surface 521a and the second sliding surface 521b to a desired sliding.

  As mentioned above, although preferred embodiment of this invention was described in detail, this invention is not limited to the said embodiment. Each embodiment and modification may be combined arbitrarily.

  For example, in the first embodiment, a further sliding member 52 may be disposed between the heat transfer layer 51 and the bent portion 43 of the heat transfer plate 41. In this case, in addition to the operational effects of the first embodiment, the operational effects of the second embodiment are also obtained. In such a case, a sliding member 520 may be used instead of the sliding member 52.

  In the third embodiment, a further sliding member 52 may be disposed between the first portion 511 and the side wall 13 of the housing 11. In this case, in addition to the operational effects of the third embodiment, the operational effects of the first embodiment are also obtained. In such a case, a sliding member 520 may be used instead of the sliding member 52.

  Furthermore, in the third embodiment, a further sliding member 52 may be disposed between the second portion 512 and the bent portion 43 of the heat transfer plate 41. In this case, in addition to the operational effects of the third embodiment, the operational effects of the second embodiment are also obtained. In such a case, a sliding member 520 may be used instead of the sliding member 52.

  In the first to third embodiments or the modified examples thereof, the bracket 24 and the end plate 25 are described as examples constituted by different members. However, for example, as shown in FIG. 8, the bracket is integrated. The end plate 125 formed in the above may be used.

  In the first to third embodiments or modifications thereof, for example, as shown in FIGS. 4 to 6, the heat transfer layer 51 and the sliding member 52 are disposed between the bracket 24 and the side wall 13 of the housing 11. Although an example of extending in the Y-axis direction so as to be sandwiched has been described, for example, as shown in FIG. 9, the heat transfer layer 51 and the sliding member 52 include the bent portion 43 and the side wall 13 of the heat transfer plate 41. It may be arranged only between. That is, the heat transfer layer 51 and the sliding member 52 may not be disposed between the end plate 125 and the side wall 13. In FIG. 9, the end plate 125 in which the bracket is integrally formed is used. However, as shown in FIGS. 4 to 6, for example, the bracket 24 and the end plate 25 may be configured by separate members. .

  In the first to third embodiments or the modifications thereof, an insulating elastic member may be disposed between the end plate 25 or 125 and the storage cell 23. For example, as shown in FIG. 10, an insulating elastic member 26 may be disposed between one end plate 125 and the storage cell 23. The elastic member 26 can contact the storage cell 23 without the heat transfer plate 41 being interposed. In FIG. 10, the end plate 125 in which the bracket is integrally formed is used. However, as shown in FIGS. 4 to 6, for example, the bracket 24 and the end plate 25 may be configured by separate members. .

  The elastic member 26 can absorb the expansion of the storage cell 23 in the Y-axis direction and suppress the size change in the arrangement direction of the storage module 21. Thereby, even if the electrical storage cell 23 expands in the Y-axis direction, it is possible to prevent the end plate 125 (or the bracket 24 and the end plate 25) from being displaced in the Y-axis direction with respect to the side wall 13. On the other hand, the storage cell 23 may be displaced in the Y-axis direction with respect to the side wall 13 due to expansion. Even in such a case, the sliding surface 52a, 52b of the sliding member 52 slides along the Y-axis direction so that the force in the Y-axis direction is absorbed. Can be suppressed.

  Furthermore, since the end plate 125 (or the bracket 24 and the end plate 25) is more stable when it is fixed in contact with the side wall 13, for example, as shown in FIG. 10, the end plate 125 (or the bracket 24 and the end plate) is fixed. 25) and the side wall 13 are preferably not provided with the heat transfer layer 51 and the sliding member 52.

  Further, the elastic member 26 can ensure insulation between the storage cell 23 and the end plate 125 (or the end plate 25). Thereby, even if it does not arrange | position an insulating member between the end plate 125 (or bracket 24) and the side wall 13, the insulation between the electrical storage module 21 and the side wall 13 is ensured. According to this configuration, it is possible to omit the work of fastening through the insulating member or the design for maintaining the fastening strength, so that the work of fastening the end plate 125 or the bracket 24 to the side wall 13 is facilitated. Become.

  DESCRIPTION OF SYMBOLS 10, 10a, 10b ... Power storage pack, 13 ... Side wall (fixed member), 21 ... Power storage module, 23 ... Power storage cell, 41 ... Heat transfer plate (heat transfer member), 51 ... Heat transfer layer (heat transfer part), 52, 520 ... sliding member, 52a, 52b ... sliding surface, 511 ... first part, 512 ... second part, 521 ... first part, 521a ... first sliding surface, 522 ... second part, 522a ... Second sliding surface.

Claims (6)

A power storage module comprising a plurality of power storage cells arranged in a first direction, and a heat transfer member connected to each of the plurality of power storage cells;
A fixed member to which the power storage module is fixed;
A heat transfer section disposed between the heat transfer member and the fixed member;
A sliding member disposed between the heat transfer member and the fixed member and having a sliding surface slidable along the first direction;
An electricity storage pack comprising:   The electricity storage pack according to claim 1, wherein the sliding member is disposed between the heat transfer section and the fixed member.   The electrical storage pack according to claim 1 or 2, wherein the sliding member is disposed between the heat transfer section and the heat transfer member. The heat transfer section includes a first portion extending along the first direction, and a second portion extending along the first direction and disposed opposite to the first portion. ,
The electrical storage pack according to any one of claims 1 to 3, wherein the sliding member is disposed between the first portion and the second portion.   The sliding member has a first portion having a first sliding surface that is slidable along the first direction, and is slidable along the first direction and faces the first sliding surface. The electricity storage pack according to any one of claims 1 to 4, further comprising a second portion having a second sliding surface arranged.   The electrical storage pack according to any one of claims 1 to 4, wherein the sliding member includes a carbon sheet.

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