JP2017103159A - Assembly jig and assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly jig which enables heat transfer surfaces to be accurately positioned without using a large scale device, and to provide an assembly method.SOLUTION: An assembling jig 1 includes: a pedestal 2 having a major surface 2a on which a heat transfer plate 30 and a cell holder 40 are arranged; a wall part 3 provided on the major surface 2a; and a wall part 4 provided on the major surface 2a and facing the wall part 3. The wall part 3 has a side surface 3a facing a side wall 41 of the cell holder 40 arranged on the major surface 2a. The wall part 4 has a side surface 4a facing a second portion 32 of the heat transfer plate 30 arranged on the main surface 2a. Openings 5a of suction holes 5 for suctioning the side wall 41 to the side surface 4a are provided on the side surface 3a, and openings 6a of suction holes 6 for suctioning the second portion 32 to the side surface 4a are provided on the side surface 4a.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an assembly jig and an assembly method.

  Patent Document 1 describes a fuel cell support mechanism. The fuel cell support mechanism includes a fuel cell stack formed by laminating laminated parts including a plurality of cells, and a plate-like external restraining member for restraining displacement of the laminated parts in the fuel cell stack.

JP 2007-250352 A

  In the fuel cell support mechanism described in Patent Document 1, when it is determined that the fuel cell stack receives a load from the outside, a laminated external component is brought into contact with the side surface of the fuel cell stack, thereby providing a laminated component. The displacement in the direction intersecting with the stacking direction is collectively restricted. Thereby, the position shift of the laminated component in the direction is suppressed.

  Here, in a battery module such as the fuel cell stack described above, it is conceivable to interpose a plate-like heat conducting member between adjacent cells. Such a battery module can promote heat dissipation from the battery cell to the external component via the heat conductive member by bringing the surface (heat transfer surface) of the heat conductive member into contact with the external component. Therefore, in such a battery module, it is important to align the heat transfer surfaces in order to reliably bring the plurality of heat transfer surfaces into contact with the external components.

  However, laminated parts such as cells and heat conducting members have variations in dimensions within a tolerance range. Therefore, as in the fuel cell mechanism described in Patent Document 1, when a plurality of laminated parts (cells, etc.) are collectively restrained by using a plate-like restraining member, this is caused by a variation in the dimensions of the laminated parts. Thus, it is difficult to accurately align the heat transfer surfaces. On the other hand, according to the knowledge of the present inventor, when the battery module is manufactured, if the care is taken such as pressing the laminated parts individually against the reference plane for alignment, it depends on the dimensional variation of the laminated parts. It is possible to accurately align the heat transfer surfaces without any trouble. However, in that case, it is considered that a large-scale device is necessary to press the laminated parts individually.

  Therefore, an object of the present invention is to provide an assembling jig and an assembling method capable of accurately aligning heat transfer surfaces without using a large-scale apparatus.

  In order to solve the above problems, an assembling jig according to the present invention has a battery cell, a first side wall and a second side wall facing each other, and a battery between the first side wall and the second side wall. A cell holder for holding the cell, a first portion disposed on the battery cell between the first side wall and the second side wall, and a second part facing the first side wall via the battery cell and the second side wall An assembly jig for integrally assembling the heat transfer plate, and a pedestal having a main surface on which the heat transfer plate and the cell holder are arranged, and a first provided on the main surface And a second wall provided on the main surface and facing the first wall, the first wall facing the first side wall of the cell holder disposed on the main surface The second wall portion has a first side surface, and the second wall portion faces the second portion of the heat transfer plate disposed on the main surface. The first side surface is provided with a first opening of an adsorption hole for adsorbing the first side wall to the first side surface, and the second side surface is provided with a second portion. A second opening of the suction hole for suctioning to the second side surface is provided.

  The assembling jig includes a first side surface facing the first side wall of the cell holder and a second side surface facing the second portion of the heat transfer plate, and the first side surface has an adsorption A first opening of the hole is provided, and a second opening of the suction hole is provided on the second side surface. For this reason, by adsorbing the first side wall of the cell holder to the first side surface, the cell holder can be reliably positioned with reference to the first side surface. In addition, by adsorbing the second portion of the heat transfer plate to the second side surface, the heat transfer plate can be reliably positioned with reference to the second side surface. That is, regardless of variations in the dimensions of the cell holder and the heat transfer plate, the distance between the outer surface of the first side wall of the cell holder and the outer surface of the second portion of the heat transfer plate is determined between the first side surface and the second side surface. It can be made constant according to the distance. Therefore, when a battery module is manufactured by stacking battery units in which battery cells, cell holders, and heat transfer plates are integrally assembled using this assembly jig, a plurality of battery units are collectively aligned. If pressed against the surface, the outer surfaces of the heat transfer plates can be accurately positioned. And what is necessary is just to use the outer surface of this heat-transfer plate as a heat-transfer surface. As described above, according to this assembly jig, it is possible to accurately align the heat transfer surfaces without using a large-scale apparatus.

  In the assembling jig according to the present invention, the main surface may be provided with a first recess in which the first portion is disposed. In this case, the heat transfer plate can be positioned using the inner surface of the first recess.

  In the assembly jig according to the present invention, the second side surface has a bottom surface facing the second portion of the heat transfer plate disposed on the main surface, and the second portion is disposed on the second side surface. The recess may be provided, and the second opening may be provided on the bottom surface. In this case, the heat transfer plate and the cell holder are mainly moved so that the second portion of the heat transfer plate is separated from the second side wall of the cell holder by causing the second portion of the heat transfer plate to enter the second recess. Can be placed on the surface.

  In the assembly jig according to the present invention, a plurality of first openings may be provided on the first side surface. In this case, the first side wall of the cell holder can be adsorbed to the first side surface while being parallel to the first side surface using the plurality of first openings.

  In the assembly jig according to the present invention, the first wall portion may be long, and the first opening may be arranged along the longitudinal direction of the first wall portion. In this case, the first side wall of the cell holder can be adsorbed to the first side surface in parallel with the first side surface along the longitudinal direction of the first wall portion.

  In the assembly jig according to the present invention, a plurality of second openings may be provided on the second side surface. In this case, the second portion of the heat transfer plate can be adsorbed to the second side surface while being parallel to the second side surface using the space between the plurality of second openings.

  In the assembly jig according to the present invention, the second wall portion may be long, and the second opening may be arranged along the longitudinal direction of the second wall portion. In this case, the second portion of the heat transfer plate can be adsorbed to the second side surface in parallel with the second side surface along the longitudinal direction of the second wall portion.

  An assembling method according to the present invention includes a battery cell, a cell holder having a first side wall and a second side wall facing each other, and holding the battery cell between the first side wall and the second side wall, A heat transfer plate having a first part disposed on the battery cell between the one side wall and the second side wall and a second part facing the first side wall through the battery cell and the second side wall And a pedestal having a main surface, a first wall portion provided on the main surface and having a first side surface, and provided on the main surface and opposed to the first side surface. A preparing step of preparing an assembly jig comprising a second wall portion having a second side surface, a first portion located on a main surface side, and a second portion being a second side surface After the plate placement step of placing the heat transfer plate on the main surface so as to be located on the side, and the plate placement step, A holder arranging step of arranging the cell holder on the main surface such that the side wall of the cell holder is located on the first side surface side and the second side wall is located on the second side surface and the second portion side. After, the battery cell is disposed on the first portion between the first side wall and the second side wall, and the battery cell, the cell holder, and the heat transfer plate are integrated with each other, and The first side surface is provided with a first opening of an adsorption hole for adsorbing the first side wall to the first side surface, and the second side is provided with the second portion on the second side surface. A second opening of the suction hole for adsorbing to the side surface is provided, and the plate placement step includes placing the heat transfer plate on the main surface, and then placing the second part through the second opening. 2 has a plate adsorption process that adsorbs to the side surface, and the holder arrangement process is performed after the cell holder is arranged on the main surface. Having a holder adsorption step of adsorbing a first sidewall through the first opening in the first side surface.

  In this assembling method, the second part of the heat transfer plate arranged on the main surface of the assembling jig is adsorbed to the second side surface in the plate arranging step. For this reason, by adsorbing the second portion of the heat transfer plate to the second side surface, the heat transfer plate can be reliably positioned with reference to the second side surface. Further, in the holder arranging step, the first side wall of the cell holder arranged on the main surface of the assembly jig is adsorbed on the first side surface. For this reason, by adsorbing the first side wall of the cell holder to the first side surface, the cell holder can be reliably positioned with reference to the first side surface. That is, regardless of variations in the dimensions of the cell holder and the heat transfer plate, the distance between the outer surface of the first side wall of the cell holder and the outer surface of the second portion of the heat transfer plate is determined between the first side surface and the second side surface. It can be made constant according to the distance. Therefore, when a battery module is manufactured by stacking battery units in which battery cells, cell holders, and heat transfer plates are integrally assembled by this assembling method, a plurality of battery units are collectively aligned as a reference plane. If it presses against, it becomes possible to position the outer surfaces of a heat-transfer plate correctly. And what is necessary is just to use the outer surfaces of this heat-transfer plate as a heat-transfer surface. As described above, according to this assembly method, it is possible to accurately align the heat transfer surfaces without using a large-scale apparatus.

  According to the present invention, it is possible to provide an assembling jig and an assembling method capable of accurately aligning heat transfer surfaces without using a large-scale apparatus.

FIG. 1 is a schematic cross-sectional view of a battery module. FIG. 2 is an exploded perspective view of the battery unit shown in FIG. FIG. 3 is a schematic perspective view of the cell holder, the heat transfer plate, and the assembly jig. 4A and 4B are schematic cross-sectional views of the assembly jig according to the present embodiment. (A)-(c) of FIG. 5 is a figure which shows the main processes of the assembly | attachment method which concerns on this embodiment. (A)-(c) of FIG. 6 is a figure which shows the main processes of the assembly | attachment method which concerns on this embodiment. (A), (b) of FIG. 7 is a figure which shows the main processes of the assembly | attachment method which concerns on this embodiment. (A), (b) of FIG. 8 is a figure which shows an example of the manufacturing method of the battery module shown by FIG. (A), (b) of FIG. 9 is a figure which shows an example of the manufacturing method of the battery module shown by FIG. (A), (b) of FIG. 10 is a figure which shows an example of the manufacturing method of the battery module shown by FIG. FIG. 11 is a diagram showing an example of a method for manufacturing the battery module shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of an assembly jig and an assembly method according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements or corresponding elements may be denoted by the same reference numerals, and redundant description may be omitted.

  FIG. 1 is a schematic cross-sectional view of a battery module. As shown in FIG. 1, the battery module 50 includes a stacked body 60 including a plurality of (for example, seven) battery units 10 stacked on each other. Each battery unit 10 includes a battery cell 20, a heat transfer plate 30, and a cell holder 40. The battery cell 20 is held by the cell holder 40. The heat transfer plate 30 is interposed between the battery cells 20 adjacent to each other.

  The battery module 50 includes a pair of fixing members 70 for fixing the laminated body 60 to an external component. Here, the external component is the casing 90 of the battery pack 100. The fixing members 70 are disposed at both ends of the stacked body 60 in the stacking direction of the battery units 10 (hereinafter sometimes simply referred to as “stacking direction”). The fixing member 70 includes a restraining portion 72 that extends along a direction intersecting the stacking direction, and a fixing portion 73 that extends from the restraining portion 72 along the stacking direction. The restricting portion 72 and the fixing portion 73 are, for example, rectangular plate shapes. The fixing member 70 is formed in, for example, an L-shaped plate shape by the restraining portion 72 and the fixing portion 73.

  The restraining portion 72 is used for applying a restraining load to the battery cell 20. More specifically, a pair of restraining portions 72 arranged at both ends of the laminate 60 in the laminating direction are fastened to each other by restraining bolts 74 and nuts 75 so that the restraining force is applied to the battery cells 20 along the laminating direction. It has been added.

  The fixing unit 73 is used for fixing the stacked body 60 to the housing 90. More specifically, the laminate 60 is fixed to the housing 90 by fastening the fixing portion 73 with bolts 76 in a state where the bottom surface of the fixing portion 73 is in contact with the housing 90. A heat conduction member (TIM: Thermal Interface Material) 80 is interposed between the laminate 60 and the housing 90. The heat conducting member 80 is in close contact with the laminate 60 and the housing 90.

  A middle plate 77 is disposed between the battery unit 10 constituting one end of the stacked body 60 in the stacking direction and the fixing member 70. An elastic member 78 that is compressed when the battery cell 20 expands is interposed between the middle plate 77 and the fixing member 70.

  Next, each part of the battery unit 10 will be described. FIG. 2 is an exploded perspective view of the battery unit shown in FIG. The battery cell 20 is a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery. The battery cell 20 is electrically connected to an electrode assembly (not shown), a rectangular box-shaped case 21 that houses the electrode assembly, and an electrode (each of a positive electrode and a negative electrode) of the electrode assembly. A pair of projecting electrode terminals 22. The electrode assembly includes a plurality of positive and negative electrodes, and a separator disposed between the positive and negative electrodes. The positive electrode and the negative electrode are alternately stacked via separators. As an example, the stacking direction of the positive electrode and the negative electrode substantially coincides with the stacking direction of the battery cells 20 (battery unit 10).

  The case 21 has a rectangular parallelepiped shape. The case 21 includes a pair of side surfaces 21a and 21b parallel to each other, a pair of side surfaces 21c and 21d parallel to each other, and a top surface 21e and a bottom surface 21f parallel to each other. The side surfaces 21a and 21b are surfaces that intersect the stacking direction. The side surfaces 21c and 21d are surfaces along the stacking direction, and are surfaces that connect the side surface 21a and the side surface 21b. The side surfaces 21a and 21b are other side surfaces adjacent to the side surfaces 21c and 21d. The electrode terminal 22 is provided on the upper surface 21e.

  The heat transfer plate 30 is made of, for example, metal. The heat transfer plate 30 includes, for example, a rectangular plate-shaped first portion 31 and, for example, a rectangular plate-shaped second portion 32. In this example, the first portion 31 and the second portion 32 intersect (for example, orthogonal) to each other. The second portion 32 extends from one end of the first portion. The second portion 32 has a long shape.

  The heat transfer plate 30 is attached to the case 21 of the battery cell 20 so that the first portion 31 is located on the side surface 21a of the case 21 and the second portion 32 is located on the side surface 21c. . That is, the heat transfer plate 30 extends over the side surface 21a of the battery cell 20 and another side surface 21c adjacent to the side surface 21a. A film 55 having insulating properties and adhesive properties is interposed between the first portion 31 and the side surface 21a. The film 55 is, for example, an insulating double-sided tape.

  The first portion 31 is thermally connected to the battery cell 20 on the side surface 21 a via the film 55. On the other hand, the second portion 32 is thermally connected to the housing 90. More specifically, the second portion 32 is thermally applied to the housing 90 via the heat conducting member 80 when the surface opposite to the side surface 21 c contacts the heat conducting member 80 on the housing 90. Connected. Thereby, the heat transfer plate 30 thermally connects the battery cell 20 and the housing 90. Hereinafter, the surface of the second portion 32 opposite to the side surface 21c is referred to as a heat transfer surface 32s.

  The cell holder 40 has a side wall (first side wall) 41 and a side wall (second side wall) 42 facing each other, and an upper wall 43 and a bottom wall 44 that are continuous with the side walls 41 and 42, respectively. In the cell holder 40, a rectangular parallelepiped space in which the battery cells 20 are fitted is defined by the side walls 41, 42 and the upper wall 43 and the bottom wall 44. The side walls 41 and 42 are respectively disposed on the side surfaces 21c and 21d of the case 21 when the battery cell 20 is fitted in the space.

  That is, the cell holder 40 holds the battery cell 20 between the side wall 41 and the side wall 42. Therefore, the first portion 31 of the heat transfer plate 30 is disposed on the battery cell 20 between the side wall 41 and the side wall 42. The upper wall 43 is disposed on the side surface 21 a of the case 21. The bottom wall 44 is disposed on the bottom surface 21 f of the case 21. The second portion 32 of the heat transfer plate 30 is disposed on the side surface 21 c of the case 21 via the side wall 42 of the cell holder 40. That is, the second portion 32 of the heat transfer plate 30 faces the side wall 41 through the side wall 42 and the battery cell 20.

  The side wall 41 is formed in a long shape (for example, a rectangular plate shape). The side wall 41 is continuous with the bottom wall 44 at one end in the longitudinal direction, and is continuous with the upper wall 43 at the other end in the longitudinal direction and at one end in the short direction. The side wall 42 is formed in a long shape (for example, a rectangular plate shape). The side wall 42 is continuous with the bottom wall 44 at one end in the longitudinal direction, and is continuous with the upper wall 43 at the other end in the longitudinal direction and at one end in the short direction. A supporting wall 45 extending along the bottom wall 44 is provided between the side wall 41 and the side wall 42 so as to connect the respective ends thereof (see also FIG. 3 below). The battery cell 20 held by the cell holder 40 is supported by contacting the inner surface 45 s of the support wall 45 and the inner surface 43 s of the upper wall 43.

  The width of the side wall 42 in the short side direction of the side wall 42 is relatively smaller at a portion between the one end and the other end than at one end and the other end in the longitudinal direction of the side wall 42. That is, a concave portion 42 a is provided on the side end surface of the side wall 42 in the short direction. The first portion 31 of the heat transfer plate 30 abuts the bottom surface of the recess 42a on the inner surface 31a. At this time, the inner surface 31 a of the first portion 31 is exposed in the cell holder 40 between the support wall 45 and the upper wall 43.

  That is, the length of the recess 42 a in the longitudinal direction of the side wall 42 is equal to or greater than the length of the first portion 31 in the longitudinal direction of the second portion 32 in this example. At this time, the inner surface 31 a of the first portion 31 is substantially flush with the inner surface 43 s of the upper wall 43 and the inner surface 45 s of the support wall 45. For this reason, the battery cell 20 held by the cell holder 40 passes through the film 55 to the inner surface 43s of the upper wall 43, the inner surface 45s of the support wall 45, and the inner surface 31a of the first portion 31 of the heat transfer plate 30. Contact. That is, as an example, the depth of the recess 42 a is smaller than the thickness of the first portion 31.

  Further, a recess 42 b in which the second portion 32 of the heat transfer plate 30 is disposed is provided on the surface (outer surface) opposite to the side wall 41 of the side wall 42. In this example, the length of the recess 42 b in the longitudinal direction of the side wall 42 is approximately the same as the length of the second portion 32 in the longitudinal direction of the second portion 32. The depth of the recess 42b is smaller than the thickness of the second portion 32, for example.

  The upper wall 43 is formed in a rectangular plate shape, for example. The upper wall 43 and the side walls 41 and 42 are orthogonal, for example. The upper wall 43 is provided with two terminal accommodating portions 46 that accommodate the electrode terminals 22 of the battery cells 20. Further, the upper wall 43 is provided with two column portions 47 that are continuous with the terminal accommodating portion 46. Each column portion 47 is provided with an insertion hole through which the restraint bolt 74 is inserted.

  The bottom wall 44 is formed in a rectangular plate shape, for example. The short direction of the bottom wall 44 coincides with the short direction of the side walls 41 and 42. Protrusions 48 are provided on one end side and the other end side in the longitudinal direction of the bottom wall 44. Each protrusion 48 is provided with an insertion hole through which the restraint bolt 74 is inserted.

  The assembling jig and the assembling method according to the present embodiment are for producing the battery unit 10 by integrally assembling the battery cell 20, the heat transfer plate 30, and the cell holder 40 as described above. . Subsequently, the assembly jig according to the present embodiment will be described. FIG. 3 is a schematic perspective view of the cell holder, the heat transfer plate, and the assembly jig. 4A and 4B are schematic cross-sectional views of the assembly jig according to the present embodiment. 4A is a cross section taken along line IVa-IVa in FIG. 3, and FIG. 4B is a cross section taken along line IVb-IVb in FIG. As shown in FIGS. 3 and 4, the assembling jig 1 includes a pedestal 2, a long wall portion (first wall portion) 3 provided on the pedestal 2, and a wall portion provided on the pedestal 2. 3, a long wall portion (second wall portion) 4 that opposes 3.

  The base 2 is formed in a rectangular plate shape, for example. The pedestal 2 has a main surface 2a on which the heat transfer plate 30 and the cell holder 40 are arranged. The main surface 2a is provided with a concave portion (first concave portion) 7 in which the first portion 31 of the heat transfer plate 30 is disposed. The length D <b> 2 of the recess 7 in the longitudinal direction of the walls 3 and 4 is approximately the same as the length of the first portion 31 in the longitudinal direction of the second portion 32 of the heat transfer plate 30. The depth D3 of the recess 7 is smaller than the thickness T1 of the first portion 31 by the thickness T2 of the upper wall 43 and the support wall 45 of the cell holder 40. That is, the thickness T1 of the first portion 31 is approximately the same as the combined size of the depth D3 of the recess 7 and the thickness T2 of the upper wall 43.

  The wall portion 3 is provided on the main surface 2 a of the base 2. The wall 3 is formed in a long shape (for example, a rectangular plate shape). The dimension in the longitudinal direction of the wall portion 3 corresponds to the dimension in the longitudinal direction of the side wall 41 of the cell holder 40. The wall 3 is continuous with the pedestal 2 on one end side in the short direction. The wall portion 3 has a side surface (first side surface) 3a facing the side wall 41 of the cell holder 40 disposed on the main surface 2a. The side surface 3a is provided with a plurality of (for example, five) openings (first openings) 5a of the suction holes 5 for sucking the side wall 41 of the cell holder 40 disposed on the main surface 2a to the side surface 3a. Yes. The openings 5 a are arranged along the longitudinal direction of the wall 3 at, for example, equal intervals. The suction hole 5 extends from the opening 5 a on the side surface 3 a to the opening 5 b on the back side of the side surface 3 a in the wall portion 3, and penetrates the wall portion 3. The shapes of the openings 5a and 5b are, for example, circular. A pump for evacuating the inside of the suction hole 5 is connected to the opening 5b.

  The wall portion 4 is provided on the main surface 2 a of the base 2. The wall 4 is formed in a long shape (for example, a rectangular plate shape). The dimension in the longitudinal direction of the wall portion 4 corresponds to the dimension in the longitudinal direction of the second portion 32 of the heat transfer plate 30. For this reason, the dimension of the wall part 3 in the longitudinal direction is larger than the dimension of the wall part 4 in the longitudinal direction. The wall 4 is continuous with the pedestal 2 on one end side in the short direction. The wall portion 4 has a side surface (second side surface) 4a facing the second portion 32 of the heat transfer plate 30 disposed on the main surface 2a. For example, the side surface 3a and the side surface 4a are substantially perpendicular to the main surface 2a and are substantially parallel to each other. The side surface 3a and the side surface 4a are opposed to each other across the recess 7 when viewed from the direction intersecting the main surface 2a. The distance D1 between the side surface 3a and the side surface 4a is the distance between the outer surface of the side wall 41 of the cell holder 40 and the outer surface of the second portion 32 of the heat transfer plate 30 (heat transfer surface 32a) in the assembled battery unit 10. Stipulate.

  The side surface 4a is provided with a recess (second recess) 8 having a bottom surface 8a on which the second portion 32 of the heat transfer plate 30 is disposed. The bottom surface 8a faces the second portion 32 of the heat transfer plate 30 disposed on the main surface 2a. The length D <b> 2 of the recess 8 in the longitudinal direction of the walls 3 and 4 is approximately the same as the length of the second portion 32 in the longitudinal direction of the second portion 32 of the heat transfer plate 30. The side surface 4a has a plurality of (for example, three) openings (second openings) of the suction holes 6 for sucking the second portion 32 of the heat transfer plate 30 disposed on the main surface 2a to the side surface 4a. 6a is provided. Here, the opening 6 a is provided on the bottom surface 8 a of the recess 8. The openings 6a are arranged along the longitudinal direction of the wall 4 at, for example, equal intervals. The suction hole 6 extends from the opening 6 a on the bottom surface 8 a of the recess 8 in the wall 4 to the opening 6 b on the back side of the side surface 4 a and penetrates the wall 4. The shapes of the openings 6a and 6b are, for example, circular. A pump for evacuating the inside of the suction hole 6 is connected to the opening 6b. The number of openings 5a is larger than the number of openings 6a.

  Subsequently, an example of an assembly method using the assembly jig 1 configured as described above will be described. First, an outline of this assembling method will be described. In this assembling method, first, an assembling jig 1 is prepared (preparation process). Subsequently, the heat transfer plate 30 is arranged on the base 2 of the assembly jig 1 (plate arrangement step). Thereafter, the cell holder 40 is placed on the base 2 of the assembly jig 1 (holder placement step). Then, the battery cell 20 is arrange | positioned between the side walls 41 and 42 of the cell holder 40, and on the heat-transfer plate 30, and the battery cell 20, the heat-transfer plate 30, and the cell holder 40 are integrated (integration process).

  Hereinafter, each step will be described in detail. 5-7 is a figure which shows the main processes of the assembly | attachment method which concerns on this embodiment. First, the plate placement process will be described. As shown in FIGS. 5A and 5B, the heat transfer plate 30 is disposed on the base 2 of the assembly jig 1. Specifically, the heat transfer plate 30 is placed on the main surface 2a so that the first portion 31 is located on the main surface 2a side and the second portion 32 of the heat transfer plate 30 is located on the side surface 4a side. Deploy. At this time, the first portion 31 is arranged in the recess 7. The thickness T1 of the first portion 31 of the heat transfer plate 30 is greater than the depth D3 of the recess 7. For this reason, the 1st part 31 protrudes from the main surface 2a. On the other hand, at this time, the second portion 32 is brought into contact with the side surface 4a. Here, the second portion 32 is disposed in the recess 8 and is in contact with the bottom surface 8a.

  In this state, the second portion 32 is adsorbed to the side surface 4a through the opening 6a (plate adsorption process). More specifically, in this step, by driving a pump connected to the suction hole 6, as shown in FIG. 5C, the suction force A1 acts on the heat transfer plate 30. . The second portion 32 of the heat transfer plate 30 is adsorbed on the side surface 4a of the wall portion 4 by the adsorption force A1. Accordingly, the heat transfer plate 30 is reliably positioned with reference to the side surface 4a of the assembly jig 1 (the bottom surface 8a of the recess 8).

  Next, a holder arrangement process will be described. As shown in FIGS. 6A and 6B, in this step, the cell holder 40 is placed on the base 2 of the assembly jig 1 on which the heat transfer plate 30 is placed after the plate placement step. . Specifically, the cell holder 40 is arranged on the main surface 2a so that the side wall 41 is located on the side surface 3a side and the side wall 42 is located on the side surface 4a and the second portion 32 side. At this time, the upper wall 43 and the support wall 45 are placed on the flat portion of the main surface 2 a that defines the recess 7. In other words, the upper wall 43 and the support wall 45 are not overlapped with the concave portion 7 when viewed from the direction intersecting the main surface 2a. As a result, the inner surface 31 a of the first portion 31 of the heat transfer plate 30 disposed in the recess 7 in the previous step is exposed in the cell holder 40 between the support wall 45 and the upper wall 43. Here, the thickness T1 of the first portion 31 is approximately the same as the sum of the depth D3 of the recess 7 and the thickness T2 of the upper wall 43 and the support wall 45. For this reason, the inner surface 31 a of the first portion 31 is substantially flush with the inner surface 43 s of the upper wall 43 and the inner surface 45 s of the support wall 45.

  Then, the side wall 41 is brought into contact with the side surface 3a. In that state, the side wall 41 is adsorbed to the side surface 3a through the opening 5a (holder adsorption process). More specifically, in this step, the suction force A2 acts on the cell holder 40 as shown in FIG. 6C by driving the pump connected to the suction hole 5. The side wall 41 of the cell holder 40 is attracted to the side surface 3a of the wall portion 3 by the attraction force A2. Thereby, the cell holder 40 is reliably positioned on the basis of the side surface 3a of the assembly jig 1.

  Next, the integration process will be described. As shown in FIGS. 7A and 7B, the battery cell 20 is arranged on the base 2 of the assembly jig 1 on which the heat transfer plate 30 and the cell holder 40 are arranged. Specifically, the battery cell 20 is disposed between the side wall 41 and the side wall 42 on the first portion 31 via the film 55. As described above, here, the inner surface 31 a of the first portion 31 of the heat transfer plate 30, the inner surface 43 s of the upper wall 43, and the inner surface 45 s of the support wall 45 are substantially flush. For this reason, the battery cell 20 contacts both the heat transfer plate 30 and the cell holder 40 via the film 55. Thereby, the battery cell 20, the heat-transfer plate 30, and the cell holder 40 are assembled | attached integrally by the adhesive force of the film 55, and preparation of the battery unit 10 is completed. In the battery unit 10 manufactured here, the interval between the outer surface of the side wall 41 of the cell holder 40 and the outer surface of the second portion 32 of the heat transfer plate 30 is independent of the dimensional variation of each component. 1 is constant according to the distance D1 between the side surface 3a and the side surface 4a.

  The suction using the opening 5a is continued after the plate suction process until the integration process is completed. Further, the suction using the opening 6a is continued after the holder suction step until the integration step is completed. However, these adsorptions may be temporarily stopped every time one battery unit 10 is manufactured, or may be continued during the manufacturing of the plurality of battery units 10.

  Subsequently, an example of a method for manufacturing the battery module 50 including a plurality (here, seven) of battery units 10 manufactured as described above will be described. First, an outline of this manufacturing method will be described. In this manufacturing method, a module assembly jig 11 is prepared. And the laminated body 60 is comprised by laminating | stacking the some battery unit 10 on the module assembly | attachment jig | tool 11 (lamination process). Thereafter, the battery units 10 are constrained from both ends of the stacked body 60 by using the fixing members 70, thereby integrating the plurality of battery units 10.

  Hereinafter, each step will be described in detail. FIGS. 8-11 is a figure which shows an example of the manufacturing method of the battery module shown by FIG. As shown in FIG. 8A, for example, the module assembling jig 11 includes a main body 12 and a pressing member 17. The main body 12 has a bottom wall 13 and a pair of side walls 14a and 14b. The bottom wall 13 has a rectangular plate shape extending along a predetermined direction. The side wall 14 a is erected on one end of the bottom wall 13 in the short direction. The side wall 14 b is erected on the other end of the bottom wall 13 in the short direction. The side walls 14 a and 14 b have a rectangular plate shape extending along the longitudinal direction of the bottom wall 13. The side walls 14 a and 14 b are substantially perpendicular to the bottom wall 13.

  In the main body 12, a rectangular parallelepiped space portion SP is formed by the bottom wall 13 and the side walls 14a and 14b. The bottom wall 13 includes a rectangular mounting surface 13 s extending along the longitudinal direction (predetermined direction) of the bottom wall 13. The mounting surface 13s is a surface facing the space SP. The side wall 14a includes a facing surface 14s. The facing surface 14s has a rectangular shape extending along the longitudinal direction of the mounting surface 13s. The facing surface 14s is a surface facing the space SP. The facing surface 14s faces the heat transfer surface 32s of the battery unit 10 placed on the placing surface 13s. A plate member P including a reference surface Ps substantially parallel to the facing surface 14s is provided on the facing surface 14s. The reference surface Ps is a surface facing the space SP.

  The main body 12 is opened on one end 12a side and the other end 12b side in the longitudinal direction. A door member 16b is attached to the side wall 14a of the main body 12 via a hinge 16a so that the open portion can be opened and closed at one end 12a. And the supporting member 15 is provided in the surface which faces the space part SP in the door member 16b.

  The pressing member 17 collectively presses the plurality of battery units 10 mounted on the mounting surface 13s toward the facing surface 14s and the reference surface Ps. For this purpose, the pressing member 17 includes a pressing portion 18 and an operation portion 19. The pressing part 18 is provided in the side wall 14b and is located in the space part SP. Here, the pressing portion 18 has a rectangular parallelepiped shape extending along the longitudinal direction of the facing surface 14s.

  The pressing portion 18 is held so as to be movable along a direction intersecting the facing surface 14s. The operation unit 19 is connected to the pressing unit 18 and penetrates the side wall 14 b to reach the outside of the main body 12. In the pressing member 17, by operating the operation unit 19, the pressing unit 18 can be moved in a direction approaching the facing surface 14 s or a direction separating from the facing surface 14 s.

  As shown in FIG. 8A, one fixing member 70 is disposed on the main body 12 of the module assembly jig 11. In that state, the plurality of battery units 10 are placed on the placement surface 13s along the longitudinal direction (predetermined direction) of the placement surface 13s. The plurality of battery units 10 are arranged such that the electrode stacking direction in the electrode assembly of the battery cell 20 is substantially aligned with the longitudinal direction of the mounting surface 13 s and the heat transfer surface 32 s of the heat transfer plate 30 faces the reference surface Ps. Is placed on the placing surface 13s.

  That is, as shown in FIG. 8B, first, one battery unit 10 is placed on the placement surface 13s so as to come into contact with the fixing member 70 held by the one end 12a of the main body 12. Thereafter, as illustrated in FIG. 9A, the plurality of battery units 10 are sequentially placed on the placement surface 13 s to form the stacked body 60 on the placement surface 13 s.

  Subsequently, as illustrated in FIG. 9B, the plurality of battery units 10 placed on the placement surface 13 s are collectively pressed against the facing surface 14 s and the reference surface Ps by the pressing member 17. To do. More specifically, by operating the operation unit 19, the pressing unit 18 is moved in the A3 direction to be brought into contact with each battery unit 10 to press the battery unit 10. Thereby, the heat transfer surface 32s of the heat transfer plate 30 can be adhered to the reference surface Ps.

  Subsequently, in the restraining step, as shown in FIG. 10A, the second fixing member 70 is provided outside the battery unit 10 constituting the end portion of the stacked body 60 on the other end 12 b side of the main body 12. Place. Thereby, the fixing member 70 is arrange | positioned at the both ends of the laminated body 60 in the lamination direction of the battery unit 10. FIG. The fixing member 70 on the other end 12b side of the main body 12 is in contact with the facing surface 14s of the side wall 14a.

  A middle plate 77 is disposed between the fixing member 70 and the battery unit 10. Further, an elastic member 78 is disposed between the middle plate 77 and the battery unit 10. Then, the fixing members 70 are fastened to each other with the restraining bolts 74, whereby a restraining load is applied to the battery cells 20 of the battery unit 10 from both sides of the stacked body 60. Thereby, the battery unit 10 is integrated and the battery module 50 is produced. Here, the pressing of the battery unit 10 by the pressing member 17 is maintained.

  In the subsequent process, the battery module 50 is taken out from the module assembly jig 11. For this purpose, first, as shown in FIG. 10B, the pressing of the battery unit 10 by the pressing member 17 is released. Here, the heat transfer surface 32s of the heat transfer plate 30 in each battery unit 10 is in contact with the reference surface Ps on the facing surface 14s. Then, as shown in FIG. 11, the battery module 50 is moved in a direction away from the facing surface 14s (A4 direction).

  Then, after opening the door member 16b and opening the one end 12a of the main body 12, the battery module 50 is moved in the direction (A5 direction) from the other end 12b of the main body 12 toward the one end 12a along the longitudinal direction of the mounting surface 13s. The battery module 50 is removed from the module assembly jig 11.

  As described above, the assembling jig 1 includes the side surface 3a facing the side wall 41 of the cell holder 40 and the side surface 4a facing the second portion 32 of the heat transfer plate 30, and the side surface 3a includes: An opening 5a of the suction hole 5 is provided, and an opening 6a of the suction hole 6 is provided on the side surface 4a. For this reason, by adsorbing the side wall 41 of the cell holder 40 to the side surface 3a, the cell holder 40 can be reliably positioned with reference to the side surface 3a. Further, by adsorbing the second portion 32 of the heat transfer plate 30 to the side surface 4a, the heat transfer plate 30 can be reliably positioned with reference to the side surface 4a. That is, the distance between the outer surface of the side wall 41 of the cell holder 40 and the outer surface of the second portion 32 of the heat transfer plate 30 is the distance between the side surface 3a and the side surface 4a regardless of the variation in the dimensions of the cell holder 40 and the heat transfer plate 30. It can be made constant according to D1.

  Therefore, when manufacturing the battery module 50 by stacking the battery units 10 in which the battery cells 20, the heat transfer plates 30, and the cell holders 40 are integrally assembled by the assembly jig 1, a plurality of battery units 10 are assembled. If it presses against the alignment reference surface Ps at once, the outer surfaces of the heat transfer plates 30 can be accurately positioned. The outer surface of the heat transfer plate may be used as the heat transfer surface 32s. As described above, according to the assembling jig 1, it is possible to accurately align the heat transfer surfaces 32s without using a large apparatus.

  In the assembling jig 1, the main surface 2a is provided with a recess 7 in which the first portion 31 is disposed. For this reason, the heat transfer plate 30 can be positioned using the inner surface of the recess 7. In particular, the heat transfer plate 30 can be positioned along the longitudinal direction of the side surfaces 3a and 4a by the inner surface of the recess 7 extending in the direction intersecting the side surfaces 3a and 4a.

  In the assembling jig 1, the side surface 4a has a bottom surface 8a facing the heat transfer surface 32s of the heat transfer plate 30 disposed on the main surface 2a, and a recess in which the second portion 32 is disposed. 8 is provided, and the opening 6a is provided on the bottom surface 8a. For this reason, the heat transfer plate 30 and the cell holder are arranged such that the second portion 32 of the heat transfer plate 30 is separated from the side wall 42 of the cell holder 40 by causing the second portion 32 of the heat transfer plate 30 to enter the recess 8. 40 can be arranged on the main surface 2a.

  In the assembling jig 1, the side surface 3a is provided with a plurality of openings 5a. For this reason, the side wall 42 of the cell holder 40 can be adsorbed to the side surface 3a while being parallel to the side surface 3a using the plurality of openings 5a.

  The wall 3 is elongated and the openings 5 a are arranged along the longitudinal direction of the wall 3. For this reason, the side wall 41 of the cell holder 40 can be adsorbed to the side surface 3a along the longitudinal direction of the wall portion 3 while being parallel to the side surface 3a.

  Moreover, in the assembly jig 1, the side surface 4a is provided with a plurality of openings 6a. For this reason, the 2nd part 32 of the heat exchanger plate 30 can be adsorb | sucked to the side surface 4a using the some opening part 6a, parallel to the side surface 4a.

  Moreover, the wall part 4 is elongate and the opening part 6a is arranged along the longitudinal direction of the wall part 4. As shown in FIG. For this reason, the 2nd part 32 of the heat exchanger plate 30 can be adsorb | sucked to the side surface 4a along the longitudinal direction of the wall part 4 in parallel with the side surface 4a.

  Here, in the assembly method according to the present embodiment, the second portion 32 of the heat transfer plate 30 disposed on the main surface 2a of the assembly jig 1 is adsorbed to the side surface 4a in the plate placement step. Further, in the holder arranging step, the side wall 41 of the cell holder 40 arranged on the main surface 2a of the assembly jig 1 is attracted to the side surface 3a. For this reason, by adsorbing the second portion 32 of the heat transfer plate 30 to the side surface 4a, the heat transfer plate 30 can be reliably positioned with reference to the side surface 4a. Further, by adsorbing the side wall 41 of the cell holder 40 to the side surface 3a, the cell holder 40 can be reliably positioned with reference to the side surface 3a. That is, the distance between the outer surface of the side wall 41 of the cell holder 40 and the outer surface of the second portion 32 of the heat transfer plate 30 is the distance between the side surface 3a and the side surface 4a regardless of the variation in the dimensions of the cell holder 40 and the heat transfer plate 30. It can be made constant according to D1.

  Therefore, when manufacturing the battery module 50 by stacking the battery units 10 in which the battery cells 20, the heat transfer plate 30, and the cell holder 40 are integrally assembled by the assembling method according to the present embodiment, a plurality of battery units are used. If 10 is collectively pressed against the reference plane Ps for alignment, the outer surfaces of the heat transfer plates 30 can be accurately positioned. And what is necessary is just to use the outer surfaces of this heat-transfer plate 30 as the heat-transfer surface 32s. As described above, according to the assembly method according to the present embodiment, it is possible to accurately align the heat transfer surfaces 32s without using a large-scale device.

  The above embodiment describes one embodiment of the assembling jig and the assembling method according to the present invention. Therefore, the assembling jig and the assembling method according to the present invention are not limited to the assembling jig 1 and the assembling method described above. The assembling jig and the assembling method according to the present invention shall be obtained by arbitrarily changing the assembling jig 1 and the assembling method described above within a range not changing the gist of each claim. it can.

  For example, a plurality of openings 5a and 6a may be provided on the side surfaces 3a and 4a of the walls 3 and 4 so as to be arranged in the short direction. Further, the shape of the openings 5a and 6a is not limited to a circle, and may be an arbitrary shape. For example, rectangular (striped) openings 5 a and 6 a extending in the longitudinal direction of the walls 3 and 4 may be arranged in the short direction of the walls 3 and 4. In this case, since the openings 5a and 6a extend in the longitudinal direction of the walls 3 and 4, the adsorption area is increased, and the state where the heat transfer plate 30 and the cell holder 40 are positioned can be stably maintained. . Furthermore, it is possible to ensure parallelism between the second portion 32 of the heat transfer plate 30 and the side wall 41 of the cell holder 40 also in the short direction of the walls 3 and 4.

  DESCRIPTION OF SYMBOLS 1 ... Assembly jig | tool, 2 ... Base, 2a ... Main surface, 3 ... Wall part (1st wall part), 4 ... Wall part (2nd wall part), 3a ... Side surface (1st side surface), 4a ... side surface (second side surface), 5a ... opening (first opening), 6a ... opening (second opening), 7 ... recess (first recess), 8 ... recess (second) 8a ... bottom surface, 20 ... battery cell, 30 ... heat transfer plate, 31 ... first part, 32 ... second part, 40 ... cell holder, 41 ... side wall (first side wall), 42 ... side wall (Second side wall).

Claims (8)

A battery cell having a first side wall and a second side wall facing each other, and holding the battery cell between the first side wall and the second side wall; and the first side wall and the second side wall A heat transfer plate having a first portion disposed on the battery cell between two side walls and a second portion facing the first side wall through the battery cell and the second side wall; , An assembly jig for assembling integrally,
A pedestal having a main surface on which the heat transfer plate and the cell holder are disposed;
A first wall provided on the main surface;
A second wall portion provided on the main surface and opposed to the first wall portion,
The first wall portion has a first side surface facing the first side wall of the cell holder disposed on the main surface,
The second wall portion has a second side surface opposed to the second portion of the heat transfer plate disposed on the main surface,
The first side surface is provided with a first opening of an adsorption hole for adsorbing the first side wall to the first side surface,
The second side surface is provided with a second opening of an adsorption hole for adsorbing the second portion to the second side surface.
Assembly jig. The main surface is provided with a first recess in which the first portion is disposed.
The assembly jig according to claim 1. The second side surface has a bottom surface facing the second portion of the heat transfer plate disposed on the main surface, and a second recess in which the second portion is disposed is provided. And
The second opening is provided on the bottom surface.
The assembly jig according to claim 1 or 2. A plurality of the first openings are provided on the first side surface.
The assembly jig according to any one of claims 1 to 3. The first wall portion is elongated,
The first openings are arranged along the longitudinal direction of the first wall,
The assembly jig according to claim 4. A plurality of the second openings are provided on the second side surface.
The assembly jig according to any one of claims 1 to 5. The second wall portion is elongated,
The second openings are arranged along the longitudinal direction of the second wall,
The assembly jig according to claim 6. A battery cell having a first side wall and a second side wall facing each other, and holding the battery cell between the first side wall and the second side wall; and the first side wall and the second side wall A heat transfer plate having a first portion disposed on the battery cell between two side walls and a second portion facing the first side wall through the battery cell and the second side wall; , Which is an assembly method for integrally assembling,
A pedestal having a main surface, a first wall portion provided on the main surface and having a first side surface, and a second wall provided on the main surface and having a second side surface facing the first side surface A preparation process for preparing an assembly jig comprising:
A plate disposing step of disposing the heat transfer plate on the main surface such that the first portion is positioned on the main surface side and the second portion is positioned on the second side surface;
After the plate arranging step, the first side wall is located on the first side surface side, and the second side wall is located on the second side surface and the second partial side. A holder placement step of placing a cell holder on the main surface;
After the holder arranging step, the battery cell is arranged on the first portion between the first side wall and the second side wall, and the battery cell, the cell holder, and the heat transfer plate are mutually connected. An integration step of integrating,
The first side surface is provided with a first opening of an adsorption hole for adsorbing the first side wall to the first side surface,
The second side surface is provided with a second opening of an adsorption hole for adsorbing the second portion to the second side surface,
The plate arranging step includes a plate adsorption step of adsorbing the second portion to the second side surface through the second opening after arranging the heat transfer plate on the main surface,
The holder arranging step includes a holder adsorption step of adsorbing the first side wall to the first side surface through the first opening after the cell holder is arranged on the main surface.
Assembly method.

Images