JP2017111872A - Method of manufacturing battery module and battery pack, battery module, and battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a battery module capable of easily reworking a battery module, where the distance from the enclosure to a heat transfer plate does not fall within a specified range when attached to the enclosure.SOLUTION: Assuming the mounting surface of an enclosure 11 mounting a battery module 21 as a virtual surface (sidewall 13 of the enclosure 11), a method of manufacturing a battery module includes a step of checking whether or not the distance from the virtual surface to a second body 43 is longer than a specified distance, a step of identifying a second body 43 longer than the specified distance, and a step of coating the opposite surface 43a to the enclosure 11, in the second body 43 identified in the step of identifying the second body 43 longer than the specified distance, with a liquid heat conduction material, and forming a first heat conduction member 45 of the hardened heat conduction material, before setting the distance from the virtual surface to the first heat conduction member 45 within the specified distance.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a battery module, a battery pack manufacturing method, a battery module, and a battery pack.

  A battery pack in which a battery module in which a plurality of battery cells held in a battery holder are arranged is attached to a housing or the like is known. Patent Document 1 discloses a battery module and a battery pack that can improve heat dissipation by attaching a heat transfer plate to a battery holder and bringing the heat transfer plate into direct or indirect contact with a casing. . In a battery module including such a heat transfer plate, the distance between the heat transfer plate and the casing when the battery module is attached to the casing is important from the viewpoint of maintaining heat dissipation.

JP 2015-156303 A

  In view of such a situation, in the battery module, the distance from the housing (virtual surface) to the heat transfer plate when the battery module is attached to the housing is managed so as to be within a specified range. For example, the distance from the housing may be measured for each heat transfer plate, and a plurality of positions may be measured for one heat transfer plate. As a result of such measurement, battery modules that do not satisfy the specified range are also detected. However, it takes a lot of time to rework (regenerate) by disassembling battery cells arranged in one direction and correctly adjusting the position of the heat transfer plate.

  Accordingly, an object of the present invention is to provide a battery module, a battery pack manufacturing method, and a battery that can easily rework a battery module whose distance from the housing to the heat transfer plate does not fall within a specified range when attached to the housing. It is to provide a module and a battery pack.

  The battery module manufacturing method of the present invention has a first side surface and a second side surface intersecting the first side surface, a plurality of battery cells arranged in a first direction intersecting the first side surface, and a battery Heat transfer having a first body part attached to the cell and contacting the first side surface, and a second body part extending from one end of the first body part in a direction intersecting the first side surface so as to cover the second side surface And a battery module manufacturing method comprising: a plate, and a distance from the virtual surface to the second body portion is longer than a specified distance when a mounting surface of a housing to which the battery module is mounted is a virtual surface An inspection step for inspecting, a specifying step for specifying the second main body portion longer than the specified distance, and a liquid heat conductive material on the opposing surface facing the housing in the second main body portion specified in the specifying step By applying, the heat transfer Material forms a heat conducting member obtained by curing, including a reproducing step of the distance to the heat conducting member within specified distance from the virtual plane.

  According to this method for manufacturing a battery module, even in the battery module having the heat transfer plate having the second body portion in which the distance from the virtual surface to the second body portion is longer than the specified distance in the inspection step, By forming a heat conducting member formed by curing the heat conducting material on the opposing surfaces of the two main body portions, the distance between the heat conducting member and the housing is within a specified distance. Thereby, the battery module whose distance from the housing to the heat transfer plate does not fall within the specified range when attached to the housing can be easily reworked without being disassembled.

  The battery module manufacturing method of the present invention further includes a jig installation step of installing a frame-shaped jig on the opposing surface of the second main body part specified in the specific step, and the regeneration step is installed in the jig installation step. A liquid heat conductive material may be applied to the inside of the frame-shaped jig.

  According to this method for manufacturing a battery module, a heat conducting member formed by curing a heat conducting material can be easily formed on the opposing surface of the second main body.

  In the regeneration step, an amount of liquid heat conductive material may be applied according to the distance acquired in the inspection step.

  According to this method for manufacturing a battery module, it is possible to form a heat conducting member that reliably satisfies the above distance with respect to a heat transfer plate whose distance from the housing is less than the specified distance.

  In the inspection step, the inspection may be performed based on distances acquired at a plurality of locations in the direction in which the second main body portion extends.

  According to this battery module manufacturing method, even when the second main body portion of the heat transfer plate is not arranged parallel to the virtual plane, the amount of the heat conductive material applied in the regeneration step is appropriately calculated. be able to.

  In the battery module manufacturing method of the present invention, the first side surface of the battery cell and the first main body portion of the heat transfer plate may be fixed via an adhesive material.

  According to this battery module manufacturing method, the battery cell after the battery module is assembled can be disassembled and the battery module can be easily reworked, which makes it difficult to readjust the position of the heat transfer plate.

  The battery pack manufacturing method of the present invention has a first side surface and a second side surface intersecting the first side surface, a plurality of battery cells arranged in a first direction intersecting the first side surface, and a battery Heat transfer having a first body part attached to the cell and contacting the first side surface, and a second body part extending from one end of the first body part in a direction intersecting the first side surface so as to cover the second side surface And a battery pack manufacturing method comprising a battery module having a plate, wherein a distance from the virtual surface to the second main body is greater than a specified distance when a mounting surface of a housing to which the battery module is mounted is a virtual surface An inspection step for inspecting whether the battery is longer, a specifying step for specifying the second main body portion longer than the specified distance, an attaching step for attaching the battery module to the housing, and the second main body portion specified in the specifying step Between the housing, By injecting Jo thermally conductive material, including, a regeneration step in which the heat conducting material forms a heat conducting member obtained by curing.

  According to this method for manufacturing a battery pack, even if the heat transfer plate having the second main body portion in which the distance from the virtual surface to the second main body portion is longer than the specified distance is specified in the inspection step, the battery After the module is attached to the housing, a heat conducting member formed by curing a heat conducting material is injected between the second body portion and the housing so that the second body portion and the housing are attached to the heat conducting member. Through. Thereby, the battery module whose distance from the housing to the heat transfer plate does not fall within the specified range when attached to the housing can be easily reworked without being disassembled.

  In the regeneration step, an amount of liquid heat conductive material corresponding to the distance acquired in the inspection step may be injected.

  According to this method for manufacturing a battery pack, it is possible to form a heat conducting member that reliably satisfies the above distance with respect to the heat transfer plate whose distance from the casing is less than the specified distance.

  In the inspection step, the inspection may be performed based on distances acquired at a plurality of locations in the direction in which the second main body portion extends.

  According to this battery pack manufacturing method, even when the second main body portion of the heat transfer plate is not arranged parallel to the virtual plane, the amount of the heat conductive material injected in the regeneration step is appropriately calculated. be able to.

  In the battery pack manufacturing method of the present invention, the first side surface of the battery cell and the first main body portion of the heat transfer plate may be fixed via an adhesive material.

  According to this battery pack manufacturing method, the battery cell after the battery module is assembled can be disassembled and the battery module can be easily reworked, which makes it difficult to readjust the position of the heat transfer plate.

  The battery module of the present invention is a battery module attached to a housing, and has a first side surface and a second side surface intersecting the first side surface, and is arranged in a first direction intersecting the first side surface. A plurality of battery cells, a first body part attached to the battery cell and in contact with the first side face, and a second extending from one end of the first body part in a direction intersecting the first side face so as to cover the second side face. A heat transfer plate having a main body, and a heat conductive member disposed on an opposing surface facing the housing in the second main body and cured by applying a liquid heat conductive material. And when the mounting surface of the housing to which the battery module is mounted is a virtual surface, the heat conducting member is disposed on the heat transfer plate whose distance from the virtual surface is longer than the specified distance, and its thickness Is within the specified distance from the virtual plane. It is set to so that.

  According to the battery module of this configuration, even when the heat transfer plate having the second main body portion whose distance from the virtual surface is longer than the specified distance is included, the heat conduction is performed on the opposing surface of the second main body portion. By forming a heat conducting member formed by curing the material, the distance from the housing is set within a specified distance. Thereby, when attached to the housing, the battery module having the heat transfer plate whose distance from the housing does not fall within the specified range can be easily reworked without being disassembled.

  In the battery module of the present invention, when the second main body is viewed in plan from the direction of attachment to the housing, the heat conducting member may be disposed in a region inside the region of the second main body. In other words, the battery module of the present invention may be formed so that the second main body portion can be visually recognized around the heat conducting member when the second main body portion is viewed in plan from the mounting direction to the housing.

  In the battery module having this configuration, it is possible to easily form a heat conductive member made of a liquid heat conductive material on the opposing surface of the second main body by using, for example, a frame-shaped jig.

  The battery pack of the present invention includes the above-described battery module, a casing in which the battery module is accommodated and fixed, and a sheet-like heat conduction member disposed between the casing and the battery module.

  According to the battery pack having this configuration, the reworked battery module is attached to the housing via the heat conducting member, so that it is possible to manufacture a battery pack with better heat dissipation performance.

  According to the present invention, it is possible to easily rework a battery module in which the distance from the housing to the heat transfer plate does not fall within the specified range when attached to the housing.

It is a perspective view which shows the battery pack which concerns on one Embodiment. It is a perspective view which shows the battery module which concerns on one Embodiment. It is a disassembled perspective view which shows the battery holder which concerns on one Embodiment, a battery cell, and a heat-transfer plate. It is a flowchart which shows an example of the manufacturing method of the battery pack in one Embodiment. It is a figure for demonstrating an example of the manufacturing method of the battery pack which concerns on one Embodiment. It is sectional drawing of the battery module which concerns on one Embodiment. (A) And (B) is sectional drawing which shows 1 process of the manufacturing method of the battery module which concerns on a modification.

  Hereinafter, a battery pack 10 according to an embodiment will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings do not necessarily match those described.

  As shown in FIG. 1, the battery pack 10 has a housing 11. A plurality of battery modules 21 are accommodated in the housing 11. 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.

  As shown in FIG. 2, the battery module 21 includes a plurality of battery cells 23, a pair of brackets 25, 25, a heat transfer plate 41, a first heat conducting member 45 (see FIG. 6), and a connecting member. A bolt B and a nut N.

  The battery cell 23 is a secondary battery such as a lithium ion secondary battery or a nickel hydride storage battery. The battery cell 23 has a first side surface 23a and a second side surface 23b that intersects the first side surface 23a. The battery cells 23 are arranged in a first direction D that is orthogonal to (intersects) the first side surface 23 a while being held by the battery holder 22.

  As shown in FIG. 3, the battery holder 22 includes a first covering portion 31, a second covering portion 32, a third covering portion 33, a fourth covering portion 34, a pair of leg portions 36 and 36, have.

  The first covering portion 31 is a portion that is formed in a rectangular flat plate shape and covers the bottom portion of the battery cell 23. The second covering portion 32 and the third covering portion 33 are portions erected from both longitudinal ends 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 battery 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 (surface orthogonal to the thickness direction) of the battery cell 23. The fourth covering portion 34 includes a first end portion 32 a (an end portion opposite to the end portion on which the first covering portion 31 is provided) in the longitudinal direction of the second covering portion 32 and a longitudinal direction of the third covering portion 33. Is connected to the first end 33a (the end opposite to the end where the first covering portion 31 is provided). The fourth covering portion 34 is arranged such that the thickness direction thereof coincides with the juxtaposed direction of the battery cells 23 and the longitudinal direction thereof coincides with the opposing direction of the second covering portion 32 and the third covering portion 33. 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 battery cell 23 is housed.

  The first end portions 32 a and 33 a in the longitudinal direction of the second covering portion 32 and the third covering portion 33 are connected to the covering portions 32 and 33 and extend in the longitudinal direction of the covering portions 32 and 33. The protrusion 35 is provided. In addition, square columnar leg portions 36 are 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.

  As shown in FIG. 2, the pair of brackets 25, 25 are provided at both ends in the juxtaposed direction of the battery cells 23 juxtaposed in the first direction D. The bracket 25 has a clamping part 25a, a fixing part 25b, and an insertion hole 25c formed in the fixing part 25b. The battery module 21 is fixed to the housing 11 by fixing the fixing portion 25b of the bracket 25 to the side wall 13 (see FIG. 6). Specifically, the bracket 25 is fixed to the housing 11 by screwing a bolt 25d inserted into the insertion hole 25c into the side wall 13.

  The bolt B and the nut N, which are connecting members, connect the pair of brackets 25, 25 to each other. Bolts B are inserted through both brackets 25. The bolt B is inserted from one bracket 25 toward the other bracket 25 and is screwed into the nut N at a position where the other bracket 25 is inserted.

  As shown in FIG. 3, the heat transfer plate 41 is a plate-like member disposed between the battery cells 23 adjacent to each other in the first direction D. The heat transfer plate 41 is formed by bending a metal plate material into an L shape, contacts the first side surface 23a of the battery cell 23, and has a rectangular plate-like first main body portion 42 and a third covering. A rectangular flat plate-like second member that covers the outer surface of the portion 33 (the surface opposite to the housing portion S in the thickness direction surface of the third covering portion 33) and bends at right angles from one longitudinal end of the first main body portion 42. A main body 43. The second main body portion 43 covers the second side surface 23 b of the battery cell 23 via the third covering portion 33.

  An adhesive tape (adhesive material) 44 is affixed to one main surface 42 a of the first main body 42 of the heat transfer plate 41. The battery cell 23 is fixed to the first main body portion 42 of the heat transfer plate 41 via an adhesive tape 44. An example of the adhesive tape 44 is a double-sided tape containing a silicone-based adhesive. Thereby, the heat-transfer plate 41 and the battery cell 23 are firmly fixed.

  As shown in FIG. 6, at least one heat transfer plate 41 has a solid first formed by curing a liquid heat conductive material on a facing surface 43 a of the second main body 43 facing the housing 11. A heat conducting member 45 is disposed. That is, the battery module 21 includes a heat transfer plate 41 in which a solid first heat conductive member 45 formed by curing a liquid heat conductive material is disposed on the facing surface 43 a of the second main body 43.

  An example of the first heat conducting member 45 (liquid heat conducting material) is polyurethane resin. The solid state may be a state having a certain volume and shape, and may be a gel. Moreover, the 1st heat conductive member 45 may have adhesiveness.

  The second heat conducting member 51 is disposed between the battery module 21 and the side wall 13. The second heat conducting member 51 is a sheet-like TIM (Thermal Interface Material). The 2nd heat conductive member 51 is a member which consists of a sheet-like material which both surfaces have adhesiveness. Further, the second heat conducting member 51 has an insulating property. As the heat conductive member having such an insulating property, a heat conductive sheet not including a metal filler can be used. The second heat conducting member 51 includes a silicone heat conducting sheet and an acrylic heat conducting sheet. When a silicone-based heat conductive sheet is used, the range of operating temperature can be widened because of excellent cold resistance and heat resistance. In addition, a silicone-based heat conductive sheet that does not use a metal filler is suitable for an insulating material because the change in electrical characteristics due to temperature and frequency is small. On the other hand, since the acryl-based sheet does not generate siloxane gas, the contact failure of the mechanical contact and the abrasion do not occur in the sealed space. Acrylic sheets are generally less expensive than silicone.

  Next, an example of a method for manufacturing the battery module 21 and the battery pack 10 of the present embodiment will be described mainly with reference to FIG. In the manufacturing method of the battery module 21, first, the battery cell 23, the battery holder 22, and the heat transfer plate 41 are prepared. Next, the battery cell 23 is accommodated in the battery holder 22, and the heat transfer plate 41 to which the adhesive tape 44 is attached is brought into contact with the battery cell 23. This operation is repeated seven times to form an array composed of the battery cells 23, the battery holder 22, and the heat transfer plate 41. Next, the array is sandwiched between a pair of brackets 25, 25, and the pair of brackets 25, 25 are connected by a connecting member. Specifically, the bolt B is inserted from one bracket 25 toward the other bracket 25, and is screwed by a nut N at a position where the other bracket 25 is inserted. Thereby, the battery module 21 as shown in FIG. 2 is assembled (step S1).

  Next, when the side wall (mounting surface) 13 of the housing 11 to which the battery module 21 is mounted is a virtual surface, is the distance from the virtual surface to the second main body 43 of the heat transfer plate 41 within a specified distance? It is inspected (step S2: inspection step). Next, the heat transfer plate 41 whose distance from the virtual surface to the second main body 43 is not within the specified distance (outside the specified distance) is specified (step S3: specifying step). Here, when the battery module 21 does not have the heat transfer plate 41 whose distance from the virtual surface to the second main body portion 43 is longer than the specified distance (outside the specified distance) (step S3: NO), the battery module 21 is concerned. Therefore, it is determined that there is no need for reworking, and the reworking (reproducing) process in steps S4 to S7 described later is omitted. And the said battery module 21 is attached to the side wall 13 of the housing | casing 11 (step S8).

  When the battery module 21 has the heat transfer plate 41 whose distance from the virtual surface to the second main body portion 43 is longer than the specified distance (outside the specified distance) (step S3: YES), rework of steps S4 to S7 to be described later A process is performed. Specifically, for each heat transfer plate 41 determined to be longer than the specified distance, the amount of liquid heat conductive material to be applied to the facing surface 43a of the second main body 43 of the second main body 43 is calculated. (Step S4). The amount is calculated based on the distance measured in step S2.

  Next, as shown in FIG. 5, the battery module 21 is installed so that the second main body 43 of the heat transfer plate 41 is an upper surface and is parallel to the virtual surface. Next, self-discharge of the battery cell 23 is started. Next, a frame-shaped jig 48 is installed on the facing surface 43a of the second main body 43 specified in step S3 (step S5: jig installation step). The jig 48 is formed in a frame shape and has a predetermined thickness t1 (for example, 0.1 mm to 2.0 mm).

  Next, a liquid heat conductive material is applied to the inside of the frame-shaped jig 48 installed in step S5, thereby forming a first heat conductive member formed by curing the heat conductive material. The distance between the one heat conducting member 45 and the housing 11 is set within a specified distance (step S6: regeneration step).

  Next, when the liquid heat conductive material applied in step S6 is cured, the jig 48 installed in step S5 is removed (step S7). At this time, the distance from the virtual surface to the second main body 43 (the surface 45a of the first heat conducting member 45) may be measured again. The rework process of step S4-step S7 is complete | finished by the above. The reworked battery module 21 is attached to the side wall 13 of the housing 11 (step S8). Specifically, as shown in FIG. 6, the bracket 25 is fixed to the housing 11 by screwing a bolt 25 d inserted into the insertion hole 25 c into the side wall 13. As mentioned above, the battery module 21 and the battery pack 10 are manufactured by implementing the process of step S1-step S8.

  According to the manufacturing method of the battery module 21 of this embodiment and the battery module 21 manufactured by this manufacturing method, the distance from the virtual surface (the side wall 13 of the housing 11) to the second main body portion 43 is the specified distance in step S2. Even if it is the battery module 21 which has the heat-transfer plate 41 which has the longer 2nd main-body part 43, the said heat conductive material hardens | cures the opposing surface 43a of the said 2nd main-body part 43. By forming 45, the distance between the first heat conducting member 45 and the housing 11 is set within a specified distance. Thereby, the battery module 21 in which the distance from the housing 11 to the heat transfer plate 41 does not fall within the specified range when attached to the housing 11 can be easily reworked without being disassembled.

  According to this embodiment, since the liquid heat conductive material is applied according to the distance acquired in step S2, the specified distance is surely satisfied with respect to the heat transfer plate 41 that is short of the specified distance. A first heat conductive member 45 is formed.

  According to the present embodiment, since the first side surface 23a of the battery cell 23 and the first main body portion 42 of the heat transfer plate 41 are fixed via the adhesive tape 44, the battery cell 23 after the battery module 21 is assembled. This is particularly effective because the battery module 21 can be easily reworked because it is difficult to disassemble the battery plate and to correctly adjust the position of the heat transfer plate 41.

  According to the present embodiment, by using the frame-shaped jig 48, it is possible to easily form the first heat conducting member 45 made of a liquid heat conducting material on the facing surface 43a of the second main body 43. become.

  According to the present embodiment, since the reworked battery module 21 is attached to the housing 11 via the sheet-like second heat conducting member 51, it is possible to manufacture the battery pack 10 with more excellent heat dissipation performance. Become.

  Various embodiments and modifications described above may be combined in various ways without departing from the spirit of the present invention.

  In the said embodiment, although the example which apply | coats a liquid heat conductive material using the jig | tool 48 installed in the opposing surface 43a of the 2nd main-body part 43 was given and demonstrated, a sheet-like and frame-shaped heat conductive member is demonstrated. It may be used to apply a liquid heat conductive material. In this case, it is advantageous in that the step of removing the jig 48 can be omitted.

  In the manufacturing method of the battery module 21, the example in which the battery module 21 is attached to the housing 11 after the first heat conductive member 45 is formed on the second main body portion 43 of the heat transfer plate 41 has been described. It is not limited to this. For example, the first heat conducting member 45 may be formed between the second main body 43 of the heat transfer plate 41 and the housing 11 after the battery module 21 is attached. In this case, steps S1 to S4 in the flowchart shown in FIG. 4 are the same as those in the above embodiment. After measuring the heat transfer plate 41 and calculating the application amount (injection amount), the battery module 21 is attached to the housing 11. And the liquid heat conductive material is inject | poured between the 2nd main-body part 43 of the heat-transfer plate 41, and the housing | casing 11, and the 1st heat conductive member 45 formed by the said heat conductive material hardening | curing is formed. In this case, when a heat conductive material having high thixotropy is used, it becomes easy to fill the heat conductive material between the second main body portion 43 and the housing 11.

  Even in the manufacturing method according to this modification, the second main body portion 43 and the housing 11 can be brought into contact with each other via the first heat conducting member 45, and therefore when the housing 11 is attached to the housing 11. The battery module 21 whose distance from the heat transfer plate 41 is not within the specified range can be easily reworked without being disassembled.

  In the manufacturing method according to the modified example, a liquid heat conductive material corresponding to the distance acquired in step S <b> 2 is provided between the second main body 43 of the heat transfer plate 41 and the housing 11 as in the above embodiment. Since it is injected, the heat transfer plate 41 and the housing 11 that are less than the specified distance can be reliably brought into contact with each other via the first heat conducting member 45. Moreover, by inspecting based on the distance acquired in the several location in the direction where the 2nd main-body part 43 extends in step S2, the 2nd main-body part 43 in the heat-transfer plate 41 is parallel to a virtual surface. Even if it is not arranged, the amount of the heat conductive material injected between the second main body 43 of the heat transfer plate 41 and the housing 11 can be calculated appropriately. Further, in the manufacturing method according to the modified example, even in the battery module 21 in which the first side surface 23 a of the battery cell 23 and the first main body portion 42 of the heat transfer plate 41 are fixed via the adhesive tape 44. Rework can be done easily.

  In the measurement (inspection) in step S2, the inspection may be performed based on distances measured at a plurality of locations (M1, M2, M3) in the direction in which the second main body portion 43 extends. According to this method, the second main body portion 43 of the heat transfer plate 41 is not arranged in parallel to the virtual plane (the angle θ is shifted in the example of FIG. 7A). In addition, the inclination can be appropriately determined, and the amount of the heat conductive material applied in step S6 can be appropriately calculated. As a result, as shown in FIG. 7B, the distance from the housing 11 (virtual surface) to the surface 45a of the first heat conducting member 45 can be appropriately kept within a specified distance.

  In the said embodiment or the said modification, although the example which arrange | positions the 2nd heat conductive member 51 which is a sheet-like TIM between the battery module 21 and the housing | casing 11 was given and demonstrated, the sheet-like 2nd heat conduction was demonstrated. Instead of the member 51, a first heat conductive member 45 formed by curing a liquid heat conductive material may be disposed.

  At this time, the crossing angle between the first main body portion 42 and the second main body portion 43 in the heat transfer plate 41 may be larger than 90 degrees. According to this configuration, the liquid heat conduction material is applied to the inner wall surface (side wall 13) of the housing 11, and the second body portion 43 of the heat transfer plate 41 is thermally conducted so as to face the inner wall surface of the housing 11. Even when air bubbles are generated between the heat transfer plate 41 and the heat conductive material when contacting the material, the generated air bubbles move along the inclined surface. Thereby, even if the heat conductive material is cured and the second heat conductive member 51 is formed, a gap due to air bubbles is formed between the second main body portion 43 of the heat transfer plate 41 and the second heat conductive member 51. The possibility of occurring can be reduced. That is, the heat dissipation of the battery cell 23 can be improved.

  Furthermore, a groove extending from the edge of the second body part 43 may be provided in the second body part 43, and the depth of the groove may be formed so as to increase toward the edge of the second body part 43. Accordingly, the generated bubbles can be moved along the groove to the edge of the second main body portion 43 and removed from between the second main body portion 43 of the heat transfer plate 41 and the second heat conducting member 51.

  Further, at this time, the array body including the battery cells 23, the battery holder 22, and the heat transfer plate 41 of the battery module 21 is mutually restrained so that the distance from the side wall 13 to the heat transfer surface increases along the first direction D. May be. With such a configuration, when the battery module is fixed to the housing 11, the air between the second heat conducting member 51 and the heat transfer surface is pushed out along the first direction D, and the second heat conduction is achieved. It is possible to suppress bubbles from remaining between the member 51 and the heat transfer surface. As a result, the contact area between the second heat conducting member 51 and the heat transfer surface increases, and the heat transfer efficiency can be improved.

  DESCRIPTION OF SYMBOLS 10 ... Battery pack, 11 ... Housing | casing, 13 ... Side wall, 21 ... Battery module, 22 ... Battery holder, 23 ... Battery cell, 41 ... Heat-transfer plate, 42 ... 1st main-body part, 42a ... Main surface, 43 ... 1st Two main body parts, 43a ... opposing surface, 44 ... adhesive tape (adhesive material), 45 ... first heat conduction member (heat conduction member formed by curing a liquid heat conduction material), 48 ... jig, 51 ... first Two heat conducting members.

Claims (12)

A plurality of battery cells having a first side surface and a second side surface intersecting the first side surface and arranged in a first direction intersecting the first side surface;
A first body part attached to the battery cell and in contact with the first side surface, and a second body part extending from one end of the first body part in a direction intersecting the first side surface so as to cover the second side surface A heat transfer plate, and a battery module manufacturing method comprising:
An inspection step for inspecting whether a distance from the virtual surface to the second main body portion is longer than a specified distance when an attachment surface of a housing to which the battery module is attached is a virtual surface;
A specifying step of specifying the second body part longer than the specified distance;
By applying a liquid heat conductive material to the opposite surface of the second main body portion specified in the specific step that faces the casing, a heat conductive member formed by curing the heat conductive material is formed. A regeneration step in which the distance from the virtual surface to the heat conducting member is within the specified distance;
A method for manufacturing a battery module, comprising: A jig installation step of installing a frame-shaped jig on the facing surface of the second main body part specified in the specifying step;
The method of manufacturing a battery module according to claim 1, wherein in the regeneration step, the liquid heat conductive material is applied to the inside of the frame-shaped jig installed in the jig installation step.   The battery module manufacturing method according to claim 2, wherein in the regeneration step, an amount of the liquid heat conductive material corresponding to the distance acquired in the inspection step is applied.   The method for manufacturing a battery module according to any one of claims 1 to 3, wherein in the inspection step, inspection is performed based on the distance acquired at a plurality of locations in a direction in which the second main body portion extends.   The method for manufacturing a battery module according to claim 1, wherein the first side surface of the battery cell and the first main body portion of the heat transfer plate are fixed via an adhesive material. . A plurality of battery cells having a first side surface and a second side surface intersecting the first side surface and arranged in a first direction intersecting the first side surface;
A first body part attached to the battery cell and in contact with the first side surface, and a second body part extending from one end of the first body part in a direction intersecting the first side surface so as to cover the second side surface A method of manufacturing a battery pack comprising a battery module having a heat transfer plate,
An inspection step for inspecting whether a distance from the virtual surface to the second main body portion is longer than a specified distance when an attachment surface of a housing to which the battery module is attached is a virtual surface;
A specifying step of specifying the second body part longer than the specified distance;
An attachment step of attaching the battery module to the housing;
A regeneration step of forming a heat conductive member formed by curing the heat conductive material by injecting a liquid heat conductive material between the second main body and the case specified in the specific step; ,
A method for manufacturing a battery pack, comprising:   The battery pack manufacturing method according to claim 6, wherein in the regeneration step, an amount of the liquid heat conductive material corresponding to the distance acquired in the inspection step is injected.   The method of manufacturing a battery pack according to claim 6 or 7, wherein in the inspection step, the inspection is performed based on the distances acquired at a plurality of locations in a direction in which the second main body portion extends.   The method for producing a battery pack according to any one of claims 6 to 8, wherein the first side surface of the battery cell and the first main body portion of the heat transfer plate are fixed via an adhesive material. . A battery module attached to a housing,
A plurality of battery cells having a first side surface and a second side surface intersecting the first side surface and arranged in a first direction intersecting the first side surface;
A first body part attached to the battery cell and in contact with the first side surface, and a second body part extending from one end of the first body part in a direction intersecting the first side surface so as to cover the second side surface And a heat transfer plate having,
A heat conducting member which is disposed on a facing surface facing the housing in the second main body and is coated with a liquid heat conducting material to cure the heat conducting material;
With
When the mounting surface of the housing to which the battery module is mounted is a virtual surface, the heat conducting member is disposed on the heat transfer plate having a distance from the virtual surface longer than a specified distance, and the thickness thereof is The battery module is set such that a distance from the virtual plane is within the specified distance.   The said heat conductive member is arrange | positioned in the area | region inside the area | region of the said 2nd main-body part, when the said 2nd main-body part is planarly viewed from the attachment direction to the said housing | casing. Battery module. The battery module according to claim 10 or 11,
A housing in which the battery module is housed and fixed;
A sheet-like heat conducting member disposed between the housing and the battery module;
A battery pack comprising:

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