Bus bar module

Abstract

To improve ease of installation of a bus bar.SOLUTION: A bus bar module 30 includes a main body 31 having a pressure deformation portion 32 that can be deformed by pressure and a sliding portion 35 that slides in the longitudinal direction of a battery cell 10 by pressing the pressure deformation portion 32, and a bus bar 40 that is attached to the tip of the sliding portion 35 and comes into contact with an external terminal 12 of the battery cell 10 as the sliding portion 35 slides, electrically connecting the external terminals of adjacent battery cells 10.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a busbar module. [Background technology]

[0002] 2. Description of the Related Art Bus bars that electrically connect battery cells are known (see, for example, Patent Document 1).

[0003] Patent Document 1 discloses a technique in which a plurality of electrode tabs individually protruding from a plurality of adjacent energy storage elements are connected via an L-shaped or U-shaped connection terminal.

[0004] In a bus bar module including a plurality of bus bars, it is preferable to improve the ease of assembly of the bus bars. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-49823 A Summary of the Invention [Problem to be solved by the invention]

[0006] In consideration of the above, an object of the present invention is to improve the ease of assembly of a bus bar. [Means for solving the problem]

[0007] A busbar module of a first aspect of the present invention comprises a main body having a pressure-deformable portion that can be deformed by pressure and a sliding portion that slides in the longitudinal direction of a battery cell when the pressure-deformable portion is pressed, and a busbar that is attached to an end of the sliding portion and comes into contact with an external terminal of the battery cell when the sliding portion slides, thereby electrically connecting the external terminals of adjacent battery cells.

[0008] A busbar module according to a second aspect of the present invention is the busbar module according to the first aspect of the present invention, wherein the busbar fits into the external terminal of the battery cell by the sliding portion sliding.

[0009] In a busbar module of a third aspect of the present invention, in the busbar module of the second aspect of the present invention, the main body portion is divided in the stacking direction of the battery cells, and the busbar is arranged at one end side of the main body portion in the longitudinal direction so as to connect adjacent main body portions, and an elastic portion is arranged at the other end side of the main body portion in the longitudinal direction so as to connect adjacent main body portions.

[0010] In a busbar module of a fourth aspect of the present invention, in the busbar module of any one of the first to third aspects of the present invention, a through hole is formed in the press-deformation portion, into which a fastener provided on the battery stack is inserted when pressed.

[0011] A busbar module of a fifth aspect of the present invention is the busbar module of any one of the first to fourth aspects of the present invention, wherein the sliding portion includes a support portion that supports the busbar from below.

[0012] A bus bar module according to a sixth aspect of the present invention is the bus bar module according to the fifth aspect of the present invention, wherein the supporting portion includes a hook portion for hooking a tip of the bus bar.

[0013] A bus bar module according to a seventh aspect of the present invention is the bus bar module according to the second aspect of the present invention, wherein an elastic deformation portion is formed at a tip of the bus bar. Effect of the Invention

[0014] In the busbar module of the first aspect of the present invention, the busbar comes into contact with the external terminals of the battery cells as the sliding portion slides, electrically connecting the external terminals of the adjacent battery cells, and the busbar is electrically connected between the external terminals of the adjacent battery cells by a pressing action. Therefore, the busbar can be assembled in a simple manner compared to attaching the busbar by welding or fastening the busbar with bolts. As a result, the ease of assembly of the busbar can be improved.

[0015] In the busbar module according to the second aspect of the present invention, the busbar is firmly connected to the external terminal by fitting the busbar to the external terminal of the battery cell as the sliding portion slides. Therefore, for example, when the battery stack is vibrated, the conductivity between the busbar and the external terminal is maintained. As a result, the vibration resistance can be improved.

[0016] In the busbar module according to the third aspect of the present invention, a busbar is disposed at one longitudinal end of the main body portion so as to connect adjacent main body portions, thereby increasing the rigidity of the one longitudinal end of the main body portion. This improves the ease of assembly of the busbar to the external terminal when the sliding portion slides. Moreover, an elastic portion is disposed at the other longitudinal end of the main body portion so as to connect adjacent main body portions, thereby making the other longitudinal end of the main body portion elastic. This causes the elastic portion to deform when the battery stack deforms (for example, when the battery stack expands and contracts in the stacking direction or when components of the battery stack move). As a result, it is possible to improve the ability to follow deformations of the battery stack.

[0017] In the busbar module according to the fourth aspect of the present invention, the pressure-deformation portion has a through hole into which a fastener provided on the battery stack is inserted when pressed, and the fastener is inserted into the through hole when the pressure-deformation portion is deformed by pressing, thereby fastening the pressure-deformation portion. This suppresses flapping of the busbar module when the battery stack vibrates, thereby improving vibration resistance.

[0018] In the busbar module according to the fifth aspect of the present invention, the sliding portion includes a support portion that supports the busbar from below, so that the busbar is supported by the support body. Therefore, the busbar is slid by the sliding portion while maintaining a desired posture. As a result, the ease of attachment of the busbar to the external terminal can be improved.

[0019] In the busbar module according to the sixth aspect of the present invention, the support portion includes a hook portion for hooking the tip of the busbar, and the tip of the busbar is positioned by the hook portion. Therefore, when the sliding portion slides by lifting the press-deformation portion during disassembly, the busbar does not fall off the sliding portion. As a result, the busbar module can be easily removed from the battery stack.

[0020] In the busbar module according to the seventh aspect of the present invention, an elastic deformation portion is formed at the tip of the busbar, so that the busbar is firmly fitted to the external terminal. Therefore, for example, when the battery stack is vibrated, the conductivity between the busbar and the external terminal is maintained. As a result, the vibration resistance can be improved. [Brief description of the drawings]

[0021] [Figure 1] FIG. 2 is an exploded perspective view showing a battery stack and a bus bar module according to the first embodiment. [Diagram 2] FIG. 2 is a front view showing the bus bar module according to the first embodiment. [Diagram 3] 3 is a cross-sectional view showing a state before the bus bar module according to the first embodiment is attached to a battery stack, showing the AA cross section in FIG. 2. [Figure 4] 3 is a perspective view showing a state after the bus bar module according to the first embodiment is attached to a battery stack. FIG. [Diagram 5] 3 is a cross-sectional view showing a state before the bus bar module according to the first embodiment is attached to a battery stack, showing the cross section taken along line BB in FIG. 2. [Figure 6] FIG. 2 is an exploded perspective view showing a bus bar and an external terminal according to the first embodiment. [Figure 7] 4 is a cross-sectional view showing a state in which a pressure-deformation portion according to the first embodiment is pressed. FIG. [Figure 8] 3 is a cross-sectional view showing a state in which the bus bar according to the first embodiment is coupled to an external terminal, showing a cross section taken along line CC in FIG. 2. [Figure 9] FIG. 11 is an exploded perspective view showing a bus bar and an external terminal according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] [First embodiment] A busbar module according to a first embodiment will be described below with reference to the drawings. An example will be described in which the busbar module according to the first embodiment is attached to a battery stack 5 (battery assembly) used as an on-board power source for electric vehicles, hybrid vehicles, etc. In each drawing, the arrow UP indicates the upper side in the vertical direction of the battery stack 5, the arrow LH indicates the left side in the horizontal direction of the battery stack 5, and the arrow FR indicates the front side in the front-to-rear direction of the battery stack 5. The stacking direction of the battery stack 5 coincides with the horizontal direction of the battery stack 5, and the longitudinal direction of the battery cells 10 coincides with the front-to-rear direction of the battery stack 5.

[0023] [Configuration of battery stack 5] 1, the battery stack 5 includes a plurality of battery cells 10 and a plurality of intermediate members 20. The battery stack 5 is formed by arranging the battery cells 10 and the intermediate members 20 alternately in the stacking direction D.

[0024] (10 battery cells) The battery cell 10 includes a battery case 11 in which an electrode assembly (not shown) is housed together with an electrolyte, and an external terminal 12 provided on the upper surface of the battery case 11.

[0025] The battery case 11 is formed in the shape of a rectangular plate extending in the front-rear direction with the thickness direction being the left-right direction. The external terminals 12 have a negative electrode external terminal 14 provided at one end of the battery cell 10 in the front-rear direction, and a positive electrode external terminal 16 provided at the other end of the battery cell 10 in the front-rear direction. The external terminals 12 are provided as a pair of a negative electrode external terminal 14 and a positive electrode external terminal 16 so that a bus bar 40 described below connects adjacent battery cells 10 in the stacking direction D.

[0026] The battery cells 10 are arranged such that the negative electrode external terminals 14 and the positive electrode external terminals 16 are alternately arranged along the stacking direction D. The external terminals 12, each formed as a pair of a negative electrode external terminal 14 and a positive electrode external terminal 16, are arranged in a staggered manner with respect to the stacking direction D.

[0027] The external terminal 12 is formed in a rectangular column shape. Inside the battery case 11, the external terminal 12 is electrically connected to a current collector provided in the electrode assembly.

[0028] 6, the negative electrode external terminal 14 is formed in a generally U-shaped cross section that opens toward the positive electrode external terminal 16. In other words, the negative electrode external terminal 14 has an opening 14A that opens toward the positive electrode external terminal 16.

[0029] The positive electrode external terminal 16 is formed to have a generally U-shaped cross section that opens toward the negative electrode external terminal 14. In other words, the positive electrode external terminal 16 has an opening 16A that opens toward the negative electrode external terminal 14. The openings 14A and 16A are provided opposite each other, and a bus bar 40, which will be described later, is fitted into the openings 14A and 16A.

[0030] (Intermediate member 20) The intermediate member 20 is made of, for example, an insulating resin. As shown in FIG.

[0031] The spacers 22 are disposed between the battery cells 10 in the stacking direction D. The spacers 22 are formed in a rectangular plate shape with the plate thickness direction being in the left-right direction. The spacer 22 provided in the center in the left-right direction is equipped with a bolt 26 provided so as to protrude upward from the top surface of the spacer 22.

[0032] The end plates 24 are disposed at both ends of the battery stack 5 in the stacking direction D. The end plates 24 are formed in a rectangular plate shape with the plate thickness direction extending in the left-right direction. The end plates 24 are provided with bolts 26 provided so as to protrude upward from the upper surfaces of the end plates 24.

[0033] [Configuration of busbar module 30] As shown in FIGS. 1 and 2, the bus bar module 30 includes a main body portion 31 and a bus bar 40.

[0034] (Main body 31) The main body 31 is made of, for example, an insulating resin. As shown in Fig. 2 and Fig. 3, the main body 31 is divided in the stacking direction D, and a plurality of the main body parts 31 are arranged at predetermined intervals in the stacking direction D. In other words, slits 31A are formed between each of the main body parts 31 at predetermined intervals.

[0035] The main body portion 31 includes a pressure deformation portion 32, a sliding portion 35, a protruding portion 36, a support portion 37, and an elastic portion 38.

[0036] <Pressure deformation portion 32> As shown in Figs. 1 and 3, the pressure deformation portion 32 includes a pressed portion 33 and an inclined portion 34. The pressed portion 33 is formed in a rectangular plate shape with the plate thickness direction being in the up-down direction. The pressed portion 33 of the main body portion 31 provided in the center in the left-right direction is formed with a through hole 33A into which the bolt 26 provided in the spacer 22 as a fastener is inserted. The pressed portions 33 of the main body portion 31 provided on both sides in the left-right direction are formed with a through hole 33A into which the bolt 26 provided in the end plate 24 as a fastener is inserted. The inclined portion 34 is formed in a rectangular plate shape inclined obliquely downward with respect to the front-rear direction from both ends of the pressed portion 33 in the front-rear direction.

[0037] <Slide section 35> The sliding portion 35 is formed in a rectangular plate shape extending in the front-rear direction from both front-rear ends of the inclined portion 34. The main body portion 31 is formed with a hat-shaped cross section by the pressed portion 33, the inclined portion 34, and the sliding portion 35. Note that the connection portion 34A between the inclined portion 34 and the pressed portion 33 and the connection portion 34B between the inclined portion 34 and the sliding portion 35 may be formed to be thinner than the inclined portion 43.

[0038] As a result, when a pressing force is applied to the pressed portion 33, the inclined portion 34 deforms so as to be inclined starting from the connection portion 34A and the connection portion 34B. In other words, the pressure-deformable portion 32 is deformable when the pressed portion 33 is pressed. Then, the sliding portion 35 slides in the longitudinal direction of the battery cell 10 when the pressure-deformable portion 32 deforms.

[0039] <Protruding part 36> 2 and 4, the sliding portion 35 has protrusions 36 protruding upward from the sliding portion 35 at both ends in the front-rear direction. The protrusions 36 are provided so as to connect the main body portions 31 adjacent to each other in the stacking direction D. The protrusions 36 are arranged in a staggered manner in the stacking direction D so as to correspond to the external terminals 12 in which the negative electrode external terminal 14 and the positive electrode external terminal 16 are formed as a pair.

[0040] A rectangular recess 36A recessed downward is formed in the protrusion 36. As shown in Fig. 3, a leg 42 of a bus bar 40 is attached to the recess 36A by a claw 36B formed in the recess 36A.

[0041] <Support part 37> 4 and 5, the protrusion 36 includes a support portion 37 that supports the bridge portion 41 of the bus bar 40 from below. The support portion 37 is provided at a position where the spacer 22 is disposed in the stacking direction D. The support portion 37 is formed with an L-shaped cross section by a base portion 37A and a hook portion 37B.

[0042] Base portion 37B is formed in a rectangular column shape extending in the front-rear direction from the left-right center of protrusion 36. Base portion 37B supports bridge portion 41 of bus bar 40 from below.

[0043] Hook portion 37B is formed in a rectangular column shape standing upward from the tip of base portion 37A. The tip of bridge portion 41 of bus bar 40 abuts against hook portion 37B. In other words, the tip of bus bar 40 is hooked onto hook portion 37B.

[0044] <Elastic part 38> 2 and 4, an elastic portion 38 is disposed on the other longitudinal end side of the main body portion 31 so as to connect adjacent main body portions 31 in the stacking direction D. The elastic portion 38 is formed in an arch shape with a U-shaped cross section, and connects adjacent protrusions 36 in the stacking direction D.

[0045] 2, a protrusion 38 is arranged on one end side of the longitudinal direction of the main body portions 31 so as to connect adjacent main body portions 31 in the stacking direction D. In other words, a bus bar 40 is arranged on one end side of the longitudinal direction of the main body portions 31 so as to connect adjacent main body portions 31 in the stacking direction D.

[0046] (Busbar 40) 6, busbar 40 is made of a conductive material such as aluminum or copper. Busbar 40 is formed into a U-shape when viewed from the front, and includes a pair of legs 42 and a bridge portion 41 connecting the pair of legs 42.

[0047] The leg portion 42 is formed in a rectangular plate shape. The bridge portion 41 is formed in an S-shaped cross section and constitutes an elastically deformable portion that is elastically deformable.

[0048] As shown in Fig. 4, the legs 42 are attached to the recesses 36A of the protrusions 36 formed on the sliding portion 35, whereby the busbar 40 is attached to the protrusions 36. The busbar 40 is disposed at the tip of the sliding portion 35 such that the bridging portions 41 protrude in the front-rear direction. As shown in Fig. 2, the busbars 40 are disposed in a staggered arrangement in the stacking direction D so as to correspond to the external terminals 12 in which the negative electrode external terminals 14 and the positive electrode external terminals 16 are formed as pairs.

[0049] As shown in FIG. 6 , as the sliding portion 35 slides, the bus bar 40 engages with the openings 14A and 16A of the pair of negative electrode external terminals 14 and positive electrode external terminals 16, electrically connecting the negative electrode external terminals 14 and positive electrode external terminals 16 of the battery cells 10 adjacent in the stacking direction D.

[0050] [Operation of busbar module 30] As shown in Figures 1 and 3, when the busbar module 30 is placed on the upper surface of the battery stack 5 and the pressed portion 33 is pressed downward, as shown in Figure 7, the inclined portion 34 deforms such that the inclination angle becomes smaller, starting from the connection portion 34A and the connection portion 34B of the inclined portion 34. Then, the sliding portion 35 slides outward in the longitudinal direction of the battery cell 10. At this time, the support portion 37 is guided by the upper surface of the spacer 22 and slides along the upper surface of the spacer 22.

[0051] When the sliding portion 35 slides outward in the longitudinal direction of the battery cell 10, the bridge portion 41 of the bus bar 40 fits into the opening 14A and opening 16A of the negative electrode external terminal 14 and positive electrode external terminal 16 formed as a pair.

[0052] 8, the bolt 26 provided on the spacer 22 is inserted into the through hole 33A of the main body 31 provided at the center in the left-right direction, and the bolt 26 provided on the end plate 24 is inserted into the through hole 33A of the main body 31 provided on both left-right sides. This causes the main body 31 to deform from a hat-shaped cross section to a flat shape.

[0053] Then, nuts 28 are attached to the bolts 26 protruding from the main body portion 31, thereby attaching the bus bar module 30 to the battery stack 5.

[0054] [Effect] The busbar module 30 of the first embodiment comprises a main body 31 having a pressure deformation portion 32 that can be deformed by pressure and a slide portion 35 that slides in the longitudinal direction of the battery cell 10 by pressing the pressure deformation portion 32, and a busbar 40 that is attached to the tip of the slide portion 35 and comes into contact with the external terminal 12 of the battery cell 10 as the slide portion 35 slides, thereby electrically connecting the external terminals of adjacent battery cells 10 (see Figure 7).

[0055] As the sliding portion 35 slides, the busbar 40 comes into contact with the external terminals 12 of the battery cells 10, electrically connecting the external terminals of the adjacent battery cells 10, and the busbar 40 is electrically connected to the external terminals of the adjacent battery cells 10 by a pressing action. Therefore, the busbar 40 can be assembled in a simpler manner than when the busbar 40 is attached by welding or fastened by bolts. As a result, the ease of assembly of the busbar 40 can be improved.

[0056] Moreover, during disassembly, by lifting up the press-deformation portion 32, the sliding portion 35 slides, and the bus bar 40 is separated from the external terminal 12. Therefore, the bus bar module can be easily removed from the battery stack.

[0057] In the bus bar module 30 according to the first embodiment, the bus bars 40 are fitted to the external terminals 12 of the battery cells 10 by the sliding of the sliding portions 35 (see FIG. 7).

[0058] As the sliding portion 35 slides, the bus bar 40 fits into the external terminal 12 of the battery cell 10, and the bus bar 40 is firmly connected to the external terminal 12. Therefore, for example, when the battery stack 5 vibrates, the conductivity between the bus bar 40 and the external terminal 12 is maintained. As a result, the vibration resistance performance can be improved.

[0059] In the busbar module 30 of the first embodiment, the main body portion 31 is divided in the stacking direction of the battery cells 10, and a busbar 40 is arranged at one end side of the longitudinal direction of the main body portion 31 so as to connect adjacent main body portions 31, and an elastic portion 38 is arranged at the other end side of the longitudinal direction of the main body portion 31 so as to connect adjacent main body portions 31 (see Figure 2).

[0060] The bus bar 40 is disposed at one end of the body portion 31 in the longitudinal direction so as to connect the adjacent body portions 31, and this increases the rigidity of the one end of the body portion 31 in the longitudinal direction. Therefore, when the slide portion 35 slides, the bus bar 40 can be easily attached to the external terminal 12. Moreover, the elastic portion 38 is disposed at the other end of the body portion 31 in the longitudinal direction so as to connect the adjacent body portions 31, and this makes the other end of the body portion 31 in the longitudinal direction elastic. Therefore, when the battery stack 5 deforms (for example, when it expands or contracts in the stacking direction D or when the components of the battery stack 5 move), the elastic portion 38 deforms. As a result, the ability to follow the deformation of the battery stack 5 can be improved.

[0061] In the busbar module 30 according to the first embodiment, the pressure deformation portion 32 is formed with a through hole 33A into which the bolt 26 provided on the battery stack 5 is inserted when pressed (see FIG. 8).

[0062] The press-deformation portion 32 has a through hole 33A into which the bolt 26 provided on the battery stack 5 is inserted when pressed, and the bolt 26 is inserted into the through hole 33A when the press-deformation portion 32 is deformed by pressing, thereby fastening the press-deformation portion 32. This suppresses flapping of the busbar module 30 when the battery stack 5 vibrates, thereby improving vibration resistance.

[0063] In the busbar module 30 according to the first preferred embodiment, the sliding portion 35 includes a support portion 37 that supports the busbar 40 from below (see FIG. 4).

[0064] Sliding portion 35 includes supporting portion 37 that supports busbar 40 from below, and thus busbar 40 is supported by supporting body 37. Therefore, busbar 40 is slid by sliding portion 35 while maintaining a desired posture. As a result, the ease of attachment of busbar 40 to external terminal 12 can be improved.

[0065] In the bus bar module 30 according to the first preferred embodiment, the support portion 37 includes a hook portion 37B for hooking the tip of the bus bar 40 (see FIG. 4).

[0066] Since the support portion 37 includes the hook portion 37B for hooking the tip of the busbar 40, the tip of the busbar 40 is positioned by the hook portion 37B. Therefore, when the press deformation portion 32 is lifted and the sliding portion 35 slides during disassembly, the busbar 40 does not fall off from the sliding portion 35. As a result, the busbar module 30 can be easily removed from the battery stack 5.

[0067] In the bus bar module 30 according to the first embodiment, an elastic deformation portion is formed at the tip of the bus bar 40 (see FIG. 6).

[0068] An elastic deformation portion is formed at the tip of the bus bar 40, so that the bus bar 40 is firmly fitted to the external terminal 12. Therefore, for example, when the battery stack 5 vibrates, the conductivity between the bus bar 40 and the external terminal 12 is maintained. As a result, the vibration resistance performance can be improved.

[0069] Second Embodiment The busbar module of the second embodiment differs from the busbar module of the first embodiment in that the configuration of the busbars is different. Note that the same or equivalent parts as those described in the first embodiment will be described using the same terms or symbols.

[0070] [composition] As shown in FIG. 9, busbar 40 is formed in a U-shape when viewed from the front, with a pair of tongue portions 141 and a connecting portion 142 connecting the pair of tongue portions 141.

[0071] The tongue portions 141 are formed in a rectangular plate shape and extend in the front-rear direction. The connecting portion 142 connects the rear ends of the pair of tongue portions 141, and includes a pair of base portions 143 and a protruding portion 143.

[0072] The pair of bases 143 are formed in a rectangular plate shape and connected to the rear ends of the pair of tongues 141. The protruding portion 143 is connected to the opposing surfaces of the pair of tongues 141. The protruding portion 143 is formed in a substantially U-shaped cross section and configured to be elastically deformable in the up-down and left-right directions. Note that the tip of the base 143 may be provided with an elastically deformable elastic portion formed in an S-shaped cross section, for example.

[0073] Bus bar 140 is attached to protrusion 36 by attaching base 143 to recess 36A of protrusion 36 formed on slide portion 35 shown in FIG.

[0074] The negative external terminal 114 has a rectangular opening 114A penetrating therethrough in the front-rear direction, and the positive external terminal 116 has a rectangular opening 116A penetrating therethrough in the front-rear direction.

[0075] The protrusion 143 of the busbar 40 is adapted to engage with the openings 114A and 116A of the negative external terminal 114 and positive external terminal 116 formed as a pair by sliding the slide portion 35 (see FIG. 1).

[0076] [Effect] In the bus bar module 30 of the second embodiment, the bus bar 140 is configured to be elastically deformable in the vertical and horizontal directions (see FIG. 9).

[0077] The busbar 140 is configured to be elastically deformable in the vertical and horizontal directions, and thus any positional deviation of the battery stack 5 in the vertical and horizontal directions is absorbed by the busbar 140. Therefore, it is possible to improve the ability to follow the deformation of the battery stack 5.

[0078] Other configurations and functions and effects are substantially the same as those of the first embodiment, and therefore description thereof will be omitted.

[0079] The busbar module of the present invention has been described above based on the first and second embodiments. However, the specific configuration is not limited to these embodiments, and design changes and the like are permitted as long as they do not deviate from the gist of the invention according to each claim in the scope of the claims.

[0080] In the first and second embodiments, an example has been shown in which the main body portion 31 is divided in the stacking direction D and arranged at predetermined intervals in a line in the stacking direction D. However, the main body portion does not have to be divided.

[0081] In the first and second embodiments, an example has been shown in which the main body portion 31 is formed with a hat-shaped cross section by the pressed portion 33, the inclined portion 34, and the sliding portion 35. However, the main body portion is not limited to this form, and may have any form as long as the sliding portion slides in the longitudinal direction of the battery cell by pressing the pressure-deformed portion.

[0082] In the first embodiment, an example has been shown in which the busbar 40 is formed in a U-shape when viewed from the front, with the pair of leg portions 42 and the bridging portion 41. However, the busbar is not limited to this form, and may be formed in a rectangular plate shape.

[0083] In the first embodiment, the busbar 40 includes an elastically deformable portion having an S-shaped cross section. However, the elastically deformable portion is not limited to this and may have any shape that allows elastic deformation. The busbar does not necessarily have to include an elastically deformable portion.

[0084] In the first and second embodiments, an example has been shown in which the bus bar engages with the pair of negative and positive external terminals by sliding the slide portion 35. However, the bus bar may be configured to come into contact with the pair of negative and positive external terminals by sliding the slide portion 35.

[0085] In the first and second embodiments, an example has been shown in which the elastic portion 38 is disposed on the other end side in the longitudinal direction of the main body portion 31 so as to connect adjacent main body portions 31 in the stacking direction D. However, the elastic portion may be provided in another location, for example, in the center of the main body portion 31 in the longitudinal direction. [Explanation of symbols]

[0086] 10 Battery Cells 12 External terminal 26 Bolt (an example of a fastener) 30 Busbar Module 31 Main body 32 Pressurized deformation part 33A through hole 35 Slide section 37 Support part 37B Hook 38 Elastic part 40 Busbar

Claims

1. A pressure deformation portion that can be deformed by pressure; a main body having a sliding portion that slides in a longitudinal direction of the battery cell by pressing the pressure deformation portion; a bus bar that is attached to a tip of the sliding portion and that comes into contact with an external terminal of the battery cell as the sliding portion slides, thereby electrically connecting the external terminals of adjacent battery cells; A busbar module comprising:

2. The bus bar is fitted to the external terminal of the battery cell by sliding the sliding portion. The bus bar module according to claim 1 .

3. the main body portion is divided in a stacking direction of the battery cells, the bus bar is disposed on one end side of the main body portion in the longitudinal direction so as to connect the adjacent main body portions; An elastic portion is disposed on the other end side of the main body portion in the longitudinal direction so as to connect the adjacent main body portions. The bus bar module according to claim 2 .

4. The pressure-deformation portion has a through hole into which a fastener provided on the battery stack is inserted when the battery stack is pressed. The bus bar module according to claim 1 .

5. The slide portion includes a support portion that supports the bus bar from below. The bus bar module according to claim 2 .

6. The support portion includes a hook portion for hooking the tip of the bus bar. The bus bar module according to claim 5 .

7. The bus bar has an elastically deformable portion at its tip. The bus bar module according to claim 2 .

Images