battery module
A technology of battery modules and single cells, which is applied in the direction of batteries, secondary batteries, battery pack components, etc., can solve the problems of thickness constraint reaction force increase and transmission, and achieve the effect of avoiding stress transmission and shortening the length
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no. 1 approach
[0094] Such as Figure 1 to Figure 5 As shown, the battery module 1 according to the first embodiment of the present invention includes a cell stack 2 formed by stacking a plurality of cells 21 in the front-rear direction, and has a front surface, a rear surface, a left surface, and a right surface. , the upper surface and the lower surface; a pair of end plates 3, which are arranged on the front surface and the rear surface of the cell stack 2; and a fastening frame 4, which connects the pair of end plates 3, wherein the fastening frame 4 includes: a right frame 5R disposed on the right surface of the cell stack 2; a left frame 5L disposed on the left surface of the cell stack 2; and a lower frame 6 disposed on the cell stack 2 the lower surface.
[0095] It should be noted that, in this specification and the like, in order to simplify and clarify the description, the stacking direction of the cells 21 is defined as the front-rear direction, and the direction perpendicular t...
no. 2 approach
[0129] Next, refer to Figure 6 to Figure 10 , the battery module according to the second embodiment of the present invention will be described. Here, only the differences from the first embodiment will be described, and the description of the first embodiment will be referred to by using the same symbols as those in the first embodiment for the configurations common to the first embodiment.
[0130] Such as Image 6 and Figure 7 As shown, the battery module 1B according to the second embodiment differs from the first embodiment in that the lower frame 6B includes a plurality of cooling fins 65 protruding downward from the lower surface of the lower frame body 61 . For example, if Image 6 and Figure 7 As shown, the plurality of cooling fins 65 extend in the front-rear direction (the extrusion direction of aluminum during molding), and are arranged side by side at predetermined intervals in the left-right direction. According to such a battery module 1B, the heat of the...
no. 3 approach
[0132] Such as Figure 8 and Figure 9 As shown, the difference of the battery module 1C according to the third embodiment is that the pair of end plates 3C have hollow portions 33 penetrating in the vertical direction at least at both left and right ends, and the fixing portion 62 of the lower frame 6C is arranged in a vertical direction. The position overlapping the hollow portion 33 of the end plate 3C as viewed in the direction; and the lower frame 6C are formed by performing press work on a sheet metal material. According to such a battery module 1C, since the fixing portion 62 can be fixed through the hollow portion 33 of the end plate 3C, the length of the battery module 1C in the front-rear direction can be shortened without increasing the length of the lower frame 6C for installing the fixing portion 62 . In addition, cost reduction can be achieved by making the lower frame 6C a press-formed product formed by press-working a sheet metal material.
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