JP2016186888A - Battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery module that can secure a temperature control efficiency of a battery cell and suppress occurrence of a defect under an expansion state of the battery cell.SOLUTION: A battery module includes an array body in which battery cells 11 held by a cell holder are arranged through a temperature control member 40, and a constraint member for applying a constraint load on the array body in the arrangement direction of the battery cell 11. The temperature control member 40 has a plate-like member 41, and plural ribs 42 arranged on at least one surface of the base 41. The temperature control member 40 is secured to a cell holder so that the rib 42 is in contact with at least one of the adjacent battery cells 11. A tip portion 42a out of the rib 42 which is in contact with at least the battery cell 11 is formed of an elastic material.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a battery module.

  As a conventional battery module, for example, as in the battery module described in Patent Document 1, there is one having a configuration in which battery cells held by a cell holder are arranged and sandwiched between end plates to apply a restraining load. Some battery modules have a configuration in which a temperature control member such as a heat radiating plate is interposed between adjacent battery cells to control the temperature of the battery cells (see, for example, Patent Document 2). The temperature control member has, for example, a plurality of ribs arranged on one surface of the base so as to extend in the same direction. The temperature control member is disposed between the battery cells so that each rib contacts an adjacent battery cell, and a flow path through which the temperature control medium flows is defined by a space surrounded by the base, the adjacent rib, and the battery cell. It is supposed to be formed.

JP 2009-81056 A JP 2006-278330 A

  In the battery module as described above, in order to efficiently control the temperature of the battery cell, it is necessary to position the temperature control member with a certain accuracy with respect to a desired portion (for example, an electrode assembly) inside the battery cell. . Moreover, in a battery module, a battery cell may expand | swell by aged deterioration, an overcharge, etc. In this case, in a battery module of a type in which a restraint load is applied to the battery cell array, the restraint load continues to be applied even when the battery cell is expanded. If the load is excessively applied, there is a possibility that a failure such as breakage of the rib or deformation of the battery cell due to the damaged rib may occur.

  An object of this invention is to provide the battery module which can ensure the temperature control efficiency of a battery cell, and can suppress generation | occurrence | production of the malfunction at the time of expansion of a battery cell.

  A battery module according to an aspect of the present invention includes an array formed by arraying battery cells held by a cell holder via a temperature control member, and a restraint that applies a restraining load to the array in the array direction of the battery cells. The temperature control member has a plate-like base and a plurality of ribs arranged on at least one surface of the base, and is attached to the cell holder so that the rib contacts at least one of the adjacent battery cells. Of the ribs, at least a tip portion in contact with the battery cell is formed of an elastic material.

  In this battery module, the temperature control member is attached to the cell holder. Therefore, when the battery cell is attached to the cell holder, it is possible to position the desired portion of the battery cell and the temperature control member with a certain accuracy, and to ensure the temperature control efficiency of the battery cell. Moreover, in this battery module, the tip part of the rib which contacts a battery cell is formed with the elastic material in the temperature control member. As a result, even when the battery cell expands, the load applied to the rib from the battery cell can be absorbed by the elasticity of the tip portion of the rib, so that trouble such as breakage of the rib or deformation of the battery cell due to the damaged rib can be prevented. Can be suppressed.

  Moreover, the front-end | tip part of a rib may be formed with the elastic material, and the base end part and base of a rib may be formed with the non-elastic material. In this case, when the battery cell is expanded, the tip end portion of the rib absorbs the load, while the shape of the base end portion of the rib is maintained. Therefore, the flow path defined between the ribs can be maintained even when the battery cell is expanded.

  In addition, the tip portion of the rib is formed of a rubber material, the base end portion of the rib and the base are formed of a metal material, and the thermal expansion coefficient of the metal material forming the base end portion is the heat of the metal material forming the base. It may be larger than the expansion coefficient. In this case, the load applied from the battery cell to the rib can be more reliably absorbed by the elasticity of the tip portion of the rib. Moreover, by forming the base end portion and the base of the rib with a metal material, the heat transfer property of the temperature control member can be ensured, and the temperature control efficiency of the battery cell can be improved. Furthermore, since the thermal expansion coefficient of the base end portion of the rib is larger than the thermal expansion coefficient of the base, the flow defined between the ribs when heat is transferred to the temperature control member during heat generation of the battery cell. A path can be expanded and the temperature control medium distribute | circulated to a flow path can be increased.

  Moreover, the whole rib may be formed of an elastic material, and the base may be formed of an inelastic material. In this case, when the battery cell is expanded, the entire rib can absorb the load. Therefore, when the battery cell is expanded, the load applied from the battery cell to the rib can be more sufficiently absorbed by the elasticity of the entire rib.

  Further, the rib and the base may be formed of an elastic material, and the rib may be formed of an elastic material having a larger amount of compressive deformation than the base. In this case, when the battery cell is expanded, the entire rib can absorb the load. Therefore, when the battery cell is expanded, the load applied from the battery cell to the rib can be more sufficiently absorbed by the elasticity of the entire rib.

  In addition, an electrode assembly is disposed inside the battery cell, and the temperature control member is attached to the cell holder so that a rib is disposed in a region overlapping the electrode assembly when viewed from the array direction of the array. Also good. Thereby, the flow path defined between the ribs and the electrode assembly can be brought close to each other, and the temperature control efficiency of the battery cell can be further ensured.

  According to this battery module, the temperature control efficiency of the battery cell can be ensured, and the occurrence of problems during expansion of the battery cell can be suppressed.

It is the schematic which shows one Embodiment of a battery module. It is sectional drawing which shows the structure of the battery cell used for the battery module shown in FIG. It is the III-III sectional view taken on the line in FIG. It is a perspective view of the cell holder with which the battery module shown in FIG. 1 was equipped. It is a principal part expanded sectional view of a temperature control member. It is a principal part expanded sectional view of the temperature control member applied to the modification of a battery module.

  Hereinafter, a preferred embodiment of a battery module will be described in detail with reference to the drawings.

  FIG. 1 is a diagram illustrating an embodiment of a battery module. As shown in the figure, the battery module 1 includes an array 2 in which the battery cells 11 held by the cell holder 30 are arrayed via a temperature control member 40, and an array of the battery cells 11 with respect to the array 2. End plates (constraining members) 3 and 3 for applying a restraining load in the direction, and an elastic body 4 interposed between the array 2 and the end plate 3 are configured.

  The array body 2 includes, for example, a plurality (seven bodies here) of battery cells 11. The battery cell 11 is, for example, a lithium ion secondary battery. As shown in FIGS. 2 and 3, the battery cell 11 includes a hollow case 12 having a substantially rectangular parallelepiped shape, for example, and an electrode assembly 13 accommodated in the case 12. The case 12 is formed of a metal such as aluminum, for example, and an organic solvent-based or non-aqueous electrolyte is injected into the case 12, for example. As shown in FIG. 2, the positive terminal 15 and the negative terminal 16 are disposed on the top surface of the case 12 so as to be separated from each other. The positive electrode terminal 15 is fixed to one side in the width direction on the top surface of the case 12 via the insulating member 17, and the negative electrode terminal 16 is fixed to the other side in the width direction on the top surface of the case 12 via the insulating member 18. Has been.

  As shown in FIG. 3, the electrode assembly 13 includes, for example, a positive electrode 21, a negative electrode 22, and a bag-like separator 23 disposed between the positive electrode 21 and the negative electrode 22. In the electrode assembly 13, the positive electrode 21 is accommodated in the separator 23, and the positive electrode 21 and the negative electrode 22 are alternately stacked via the separator 23 in this state.

  The positive electrode 21 includes a metal foil 21a made of, for example, aluminum foil, and a positive electrode active material layer 21b formed on both surfaces of the metal foil 21a. The positive electrode active material layer 21b is formed including a positive electrode active material and a binder. Examples of the positive electrode active material include composite oxide, metallic lithium, and sulfur. The composite oxide includes, for example, at least one of manganese, nickel, cobalt, and aluminum and lithium. A tab 21 c is formed on the upper edge portion of the positive electrode 21 corresponding to the position of the positive electrode terminal 15. The tab 21 c extends upward from the upper edge portion of the positive electrode 21 and is connected to the positive electrode terminal 15 via the conductive member 24.

  On the other hand, the negative electrode 22 has, for example, a metal foil 22a made of copper foil and a negative electrode active material layer 22b formed on both surfaces of the metal foil 22a. The negative electrode active material layer 22b is formed including a negative electrode active material and a binder. Examples of the negative electrode active material include carbon such as graphite, highly oriented graphite, mesocarbon microbeads, hard carbon, and soft carbon, alkali metals such as lithium and sodium, metal compounds, SiOx (0.5 ≦ x ≦ 1.5 ) And the like, and boron-added carbon. A tab 22 c is formed at the upper edge of the negative electrode 22 in correspondence with the position of the negative electrode terminal 16. The tab 22 c extends upward from the upper edge portion of the negative electrode 22, and is connected to the negative electrode terminal 16 through the conductive member 25.

  The separator 23 is formed in a bag shape, for example, and accommodates only the positive electrode 21 therein. Examples of the material for forming the separator 23 include a porous film made of a polyolefin resin such as polyethylene (PE) and polypropylene (PP), a woven fabric or a nonwoven fabric made of polypropylene, polyethylene terephthalate (PET), methylcellulose, and the like. The separator 23 is not limited to a bag shape, and a sheet shape may be used.

  The cell holder 30 is integrally formed of, for example, resin. As shown in FIG. 1, the cell holder 30 includes four continuous surfaces surrounding a pair of main surfaces (surfaces orthogonal to the arrangement direction of the battery cells 11) that face each other among the surfaces of the case 12 of the battery cell 11 ( The battery cell 11 is hold | maintained by contacting with the top surface and bottom surface (refer FIG. 2).

  The end plate 3 is a metal plate-like member, for example. As shown in FIG. 1, the end plate 3 has an area larger than the area when the battery cell 11 is viewed from the arrangement direction, for example, and the outer edge portion of the end plate 3 is larger than the outer edge portion of the battery cell 11. In an overhanging state, the array body 2 and the elastic body 4 are disposed at both ends in the array direction. A plurality of bolts 5 are inserted through outer edge portions of the end plates 3 and 3. When the nut 6 is screwed onto the tip of each bolt 5 from the outside of the end plate 3, the battery cell 11 and the elastic body 4 are sandwiched and unitized, and a restraining load is applied.

  The elastic body 4 is a member used for the purpose of preventing the battery cell 11 and the end plate 3 from being damaged by a restraining load when the battery cell 11 is expanded. As shown in FIG. 1, the elastic body 4 is formed in a rectangular plate shape by, for example, urethane rubber sponge, and is disposed between the battery cell 11 on one end side in the arrangement direction and the end plate 3. Examples of the material for forming the elastic body 4 include ethylene propylene diene rubber (EPDM), chloroprene rubber, and silicon rubber.

  Subsequently, the cell holder 30 and the temperature control member 40 constituting the array body 2 will be described in more detail.

  As shown in FIG. 4, the cell holder 30 includes a frame body 31, a partition portion 34, a terminal accommodating portion 35, and a column portion 36.

  The frame 31 includes, for example, a rectangular plate-like bottom plate 32 and a pair of rectangular plate-like side plates 33 that stand vertically from both ends in the longitudinal direction of the bottom plate 32 and face each other. In the present embodiment, the length of the bottom plate 32 in the short direction is the same as the length of the side plate 33 in the short direction. Rectangular openings 33a and 33a are formed at the center in the longitudinal direction of the side plates 33 and 33 by cutting out one end of the side plate 33 in the short direction. The openings 33 a and 33 a are opposed to each other and extend in the longitudinal direction of the side plate 33. Protrusions 32a projecting in the thickness direction of the bottom plate 32 are provided at both ends in the longitudinal direction of the bottom plate 32, and through holes 32b extending in the short direction of the bottom plate 32 are provided in each of the projecting portions 32a. Is provided. The bolt 5 described above is inserted into the through hole 32b.

  The frame body 31 has a partition portion 34. The partition portion 34 has, for example, a rectangular plate shape, extends perpendicularly to the side plate 33, and connects the side plates 33 to each other. In the present embodiment, the partition portion 34 extends from one end in the short direction of the side plate 33 (the end portion on the back side in FIG. 4) at the intermediate portion in the longitudinal direction of the side plate 33. The direction coincides with the longitudinal direction of the side plate 33.

  A terminal accommodating portion 35 is provided in the partition portion 34. The terminal accommodating portion 35 is provided, for example, on one end surface (upper end surface in FIG. 4) in the short direction of the partition portion 34 at both ends in the longitudinal direction of the partition portion 34. The terminal accommodating portion 35 faces the bottom plate 32. In the present embodiment, the terminal accommodating portion 35 has an arc-shaped inner wall that surrounds the positive electrode terminal 15 and the negative electrode terminal 16, and opens to one side (the front side in FIG. 4) in the thickness direction of the partition portion 34. ing. The terminal accommodating portion 35 is continuous with each side plate 33.

  A pair of square columnar column portions 36 connected to the terminal accommodating portion 35 are provided on one end face in the short direction of the partition portion 34, and each column portion 36 extends in the thickness direction of the partition portion 34. A through hole 36a is provided. The bolt 5 described above is inserted into the through hole 36a.

  The battery cell 11 is fitted into the cell holder 30 configured as described above. More specifically, among the surfaces of the case 12 of the battery cell 11, four consecutive surfaces (including a top surface and a bottom surface) surrounding a pair of opposed main surfaces are the bottom plate 32 and the side plate 33 of the cell holder 30. , 33 and the column portions 36, 36, respectively. That is, the top surface of the case 12 faces the column portions 36, 36, the bottom surface of the case 12 faces the bottom plate 32, and the side surface of the case 12 faces the side plates 33, 33.

  As shown in FIGS. 4 and 5, the temperature control member 40 includes a rectangular plate-shaped base 41 and a plurality of (here, eight) ribs 42 having a rectangular cross section.

  The base 41 is made of a resin material such as polypropylene. In this embodiment, the length of the base 41 in the short direction is, as shown in FIG. 4, from one end of the bottom plate 32 in the short direction (end on the back side in FIG. 4) to one end of the partition portion 34. It is substantially the same as the distance to (the end on the bottom plate 32 side). In the present embodiment, the length of the base 41 in the longitudinal direction is substantially the same as the distance between the pair of facing surfaces of the side plates 33 and 33 facing each other. In the present embodiment, the thickness of the base 41 is substantially the same as the thickness of the partition portion 34.

  As shown in FIG. 5, the rib 42 has a distal end portion 42a formed of an elastic material and a proximal end portion 42b formed of an inelastic material. Examples of the elastic material include rubber materials such as urethane rubber, ethylene propylene diene rubber (EPDM), chloroprene rubber, and silicon rubber. In addition, examples of the inelastic material include a material whose deformation amount (crushed amount) is smaller than that of the elastic material used in the tip portion 42a. Specifically, as the inelastic material, for example, the same resin material as that of the base 41 such as polypropylene can be used.

  In the present embodiment, the distal end portion 42a and the proximal end portion 42b have substantially the same outer shape and have a plate shape extending in one direction. The distal end portion 42a and the proximal end portion 42b are bonded to each other with, for example, an adhesive or the like in a state where they extend in the same direction and have one surface overlapped. Thereby, the rib 42 exhibits a rectangular parallelepiped outer shape extending in one direction. In the present embodiment, the length of the rib 42 in the extending direction is substantially the same as the length of the base 41 in the longitudinal direction. In the present embodiment, the width of the rib 42 is substantially the same as the thickness of the base 41.

  As shown in FIG. 4, the ribs 42 are arranged on one surface of the base 41 so as to extend in the same direction. More specifically, each rib 42 is approximately the same as the width of the rib 42 along the direction orthogonal to the extending direction of the rib 42 in a state where the extending direction of the rib 42 matches the longitudinal direction of the base 41. Are arranged substantially in parallel with each other. The distance between the ribs 42 and 42 located at both ends in the arrangement direction of the ribs 42 is approximately the same as the distance between both edges in the extending direction of the opening 33a. In addition, the positions of both edges in the extending direction of the rib 42 substantially coincide with the positions of both edges in the longitudinal direction of the base 41. In the present embodiment, the base end portion 42b of the rib 42 is integrally formed with the base 41 with resin.

  The temperature control member 40 configured as described above has a state in which the rib 42 is directed to the space surrounded by the frame 31 at one end of the frame 31 (the end on the back side in FIG. 4) (inward state). And attached to the cell holder 30. More specifically, the peripheral edge of the base 41 of the temperature control member 40 is at one end in the short direction (end on the back side in FIG. 4) in each of the bottom plate 32, the side plates 33 and 33, and the partition portion 34. It is connected. In the present embodiment, the base 41 and the base end portion 42b are integrally molded with the cell holder 30 with resin. The distal end portion 42a is bonded to the integrally formed base 41 and proximal end portion 42b with an adhesive or the like.

  One surface of the base 41 on which the rib 42 is formed is flush with one surface of the partition portion 34, and the rib 42 protrudes from the one surface of the partition portion 34. As shown in FIG. 5, the rib 42 is positioned so as to contact the battery cell 11 held by the cell holder 30. More specifically, the tip end portion 42 a of the rib 42 is in contact with one main surface of the case 12. For this reason, a space (flow path S) surrounded by one main surface of the case 12, the base 41, and the ribs 42 and 42 is formed along the extending direction of the ribs 42. The flow path S is used as a flow path through which a temperature control medium such as cooled air flows, and contributes to temperature control of the battery cell 11.

  In this embodiment, the ribs 42 and 42 located at both ends in the arrangement direction of the ribs 42 are respectively located in the vicinity of both edges in the extending direction of the opening 33a. That is, when viewed from the direction in which the openings 33a and 33a face each other, each rib 42 (at least the ribs 42 and 42 positioned at both ends in the arrangement direction of the ribs 42) is the peripheral portion of the opening 33a. Located within the enclosed area. Therefore, the temperature control medium flowing in from one opening 33a can pass through each flow path S and flow out from the other opening 33a.

  Further, the temperature control member 40 is attached to the cell holder 30 so that the ribs 42 are disposed in a region overlapping the electrode assembly 13 when viewed from the arrangement direction of the array 2. More specifically, in the present embodiment, the rib 42 is a region where the positive electrode active material layer 21b and the negative electrode active material layer 22b face each other in the electrode assembly 13 when viewed from the arrangement direction of the array 2 (FIG. 3). (See reference).

  As described above, in the present embodiment, the temperature control member 40 is attached to the cell holder 30. Therefore, when the battery cell 11 is attached to the cell holder 30, it is possible to position the desired portion of the battery cell 11 and the temperature control member 40 with a certain accuracy, and to ensure the temperature control efficiency of the battery cell 11. .

  More specifically, the electrode assembly 13 is disposed inside the battery cell 11, and the temperature control member 40 has ribs 42 disposed in a region overlapping the electrode assembly 13 when viewed from the arrangement direction of the array 2. It is attached to the cell holder 30 as described. Thereby, the flow path S defined between the ribs 42 and the electrode assembly 13 can be brought close to each other, and the temperature control efficiency of the battery cell 11 can be further ensured.

  In the present embodiment, in the temperature control member 40, the tip end portion 42a of the rib 42 that contacts the battery cell 11 is formed of an elastic material. Thereby, even when the battery cell 11 is expanded, the load applied to the rib 42 from the battery cell 11 can be absorbed by the elasticity of the tip end portion 42a of the rib 42. Therefore, the battery cell is damaged by the rib 42 or by the damaged rib 42. 11 can be prevented from occurring. In addition, the tip portion 42 a also has an effect of insulation between the battery cells 11.

  Moreover, in this embodiment, the front-end | tip part 42a of the rib 42 is formed with the elastic material, and the base end part 42b and the base 41 of the rib 42 are formed with the inelastic material. In this case, when the battery cell 11 is expanded, the distal end portion 42a of the rib 42 absorbs the load, while the shape of the proximal end portion 42b of the rib 42 is maintained. Therefore, the flow path S defined between the ribs 42 can be maintained even when the battery cell 11 is expanded.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the distal end portion 42a and the proximal end portion 42b have substantially the same outer shape. For example, the height dimension of the distal end portion 42a depends on the load received from the battery cell 11 or the like. May be appropriately changed. Further, the dimensions of the base 41 and the ribs 42 of the temperature control member 40, the arrangement intervals of the ribs 42, and the like may be changed as appropriate.

  Further, in the above embodiment, the rib 42 has a rectangular parallelepiped outer shape extending in one direction. For example, the rib 42 has a protrusion shape (pin shape), They may be dimensionally arranged in a grid. Alternatively, the ribs 42 may have a protruding shape (pin shape), and may be irregularly arranged two-dimensionally on one surface of the base 41. Thus, the shape and arrangement of the ribs 42 may be changed as appropriate according to design conditions.

  Moreover, in the said embodiment, although the base end part 42b and the base 41 of the rib 42 are formed with the inelastic resin material, you may form with the inelastic metal material. In this case, by forming the base end portion 42b and the base of the rib 42 with a metal material, the heat transfer property of the temperature control member 40 can be ensured, and the temperature control efficiency of the battery cell 11 can be improved. Examples of inelastic metal materials include aluminum, copper, iron, and alloys using these.

  When the base end portion 42b of the rib 42 and the base 41 are formed of an inelastic metal material, the thermal expansion coefficient of the metal material forming the base end portion 42b is the heat of the metal material forming the base 41. It may be larger than the expansion coefficient. In this case, since the thermal expansion coefficient of the base end portion 42b of the rib 42 is larger than the thermal expansion coefficient of the base 41, when heat is transmitted to the temperature control member 40 when the battery cell 11 generates heat, the rib 42 The flow path S defined in between is expanded, and the temperature control medium to be circulated through the flow path S can be increased. In addition, as a metal material of the base 41, iron etc. are mentioned, for example, As a metal material of the base end part 42b, aluminum, copper, or an alloy using them is mentioned, for example.

  In the above embodiment, the tip end portion 42a of the rib 42 is formed of an elastic material, and the base end portion 42b and the base 41 of the rib 42 are formed of an inelastic material. However, as shown in FIG. May be formed of the elastic material described above, and the base 141 may be formed of the non-elastic material described above. In this case, the load can be absorbed by the entire rib 142 when the battery cell 11 is expanded. Therefore, when the battery cell 11 is expanded, the load applied from the battery cell 11 to the rib 142 can be more sufficiently absorbed by the elasticity of the entire rib 142.

  Moreover, in the said embodiment, although the front-end | tip part 42a of the rib 42 is formed with an elastic material and the base end part 42b and the base 41 of the rib 42 are formed with an inelastic material, the rib 42 and the base 41 are elastic materials. The rib 42 may be formed of an elastic material having a larger amount of compressive deformation with respect to the load than the base 41. In this case, when the battery cell 11 is expanded, the entire rib 42 can absorb the load. Therefore, when the battery cell 11 is expanded, the load applied from the battery cell 11 to the rib 42 can be more sufficiently absorbed by the elasticity of the entire rib 42.

  In the above embodiment, the rib 42 is formed on one surface of the base 41, but the rib 42 may be formed on the other surface opposite to the one surface of the base 41. In this case, the rib 42 comes into contact with another adjacent battery cell 11 in a state of projecting outward from the frame body 31 (outward state). More specifically, the tip portion 42 a of the rib 42 comes into contact with one main surface of the case 12 of another adjacent battery cell 11. The ribs 42 may be provided on both one side and the other side of the base 41.

  In the above embodiment, the rib 42 of the temperature control member 40 extends in the longitudinal direction of the base 41 (the width direction of the battery cell 11), but the rib 42 extends in the short direction of the base 41 (battery cell). 11 in the height direction).

  In the above embodiment, the end plates 3 and 3 are fastened with the bolts 5 and the nuts 6 to apply a restraining load to the array body 2 and the elastic body 4. They may be connected with a metal plate or the like, and both ends of the restraining band may be fastened to the end plates 3 and 3 with bolts or the like, respectively, and a restraining load may be applied to the array body 2 and the elastic body 4. Further, the battery module 1 may be configured not to include the elastic body 4. Even in this case, since the tip end portion 42a is formed of an elastic material, it is possible to prevent the battery cell 11 and the end plate 3 from being damaged by the restraining load.

  DESCRIPTION OF SYMBOLS 1 ... Battery module, 2 ... Array, 3 ... End plate (restraint member), 11 ... Battery cell, 13 ... Electrode assembly, 30 ... Cell holder, 40 ... Temperature control member, 41, 141 ... Base, 42, 142 ... Rib, 42a ... distal end portion, 42b ... proximal end portion.

Claims (6)

An array formed by arranging battery cells held by a cell holder via a temperature control member;
A restraining member for applying a restraining load in the arrangement direction of the battery cells to the array body,
The temperature control member has a plate-like base and a plurality of ribs arranged on at least one surface of the base, and is attached to the cell holder so that the rib contacts at least one of the adjacent battery cells. ,
A battery module in which at least a tip portion of the rib that is in contact with the battery cell is formed of an elastic material. The tip portion of the rib is formed by the elastic material,
The battery module according to claim 1, wherein the base end portion of the rib and the base are formed of an inelastic material. The tip portion of the rib is formed of a rubber material,
The base end portion of the rib and the base are formed of a metal material,
The battery module according to claim 2, wherein a thermal expansion coefficient of the metal material forming the base end portion is larger than a thermal expansion coefficient of the metal material forming the base. The entirety of the rib is formed by the elastic material,
The battery module according to claim 1, wherein the base is made of an inelastic material. The rib and the base are formed of the elastic material,
The battery module according to claim 1, wherein the rib is formed of the elastic material having a larger amount of compressive deformation with respect to a load than the base. An electrode assembly is disposed inside the battery cell,
The said temperature control member is attached to the said cell holder so that the said rib may be arrange | positioned in the area | region which overlaps with the said electrode assembly seeing from the sequence direction of the said array body. Battery module.

Images