Sheet metal shell assembly, battery module and battery pack

Abstract

The utility model discloses a sheet metal shell assembly, battery module and battery pack wherein the sheet metal shell assembly includes battery pack shell, the end of battery pack shell is provided with first through hole, the bottom in battery pack shell is provided with two sets of L-shaped support, the opposite end of the bottom of L-shaped support is provided with first bending edge, the first bending edge is provided with second bending edge, the second bending edge is provided with second through hole, and the second bending edge is provided with second through hole. A second pressing rivet nut is arranged at the top end of the L-shaped bracket, a third pressing rivet nut is arranged at the bottom end of the L-shaped bracket, the battery pack comprises a plurality of groups of lithium battery modules mounted in a battery pack shell, and the plurality of groups of lithium battery modules are separated into an upper layer and a lower layer through two layers of mounting plates; the lithium battery modules are fixed more simply and conveniently through the battery pack shell and the two layers of mounting plates, and meanwhile, the lithium battery modules are connected in series through the series copper bars more reasonably; and by arranging the mounting assembly at one end of the two-layer mounting plate, the layout and installation of related electric appliance components of the battery pack are more reasonable.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a sheet metal shell component, a battery module and a battery pack. Background Art

[0002] In recent years, with the vigorous development of the new energy industry, the application of lithium batteries in the field of low-speed vehicles has become more and more common. Lithium batteries are formed into modules through a certain series-parallel relationship, and multiple modules and necessary electrical components can form a battery pack.

[0003] There are many types of low-speed vehicles on the market. Different battery packs need to be configured for different types of low-speed vehicles. However, the battery packs in the prior art have the following problems: the lithium battery module is difficult to fix, which increases labor time, and the series connection between modules is difficult; the fixing position of electrical components is unreasonable, which wastes battery pack space; the design of sheet metal parts such as the battery pack shell and the second-layer mounting plate is unreasonable.

[0004] Therefore, it is necessary to provide a sheet metal shell assembly, a battery module and a battery pack to solve the above technical problems. Summary of the invention

[0005] The purpose of the utility model is to provide a sheet metal housing assembly, a battery module and a battery pack to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a sheet metal shell assembly, comprising a battery pack shell; a first through hole is provided at the end of the battery pack shell, fixing blocks are provided on both sides of the battery pack shell, a third through hole is provided on the fixing blocks, a first rivet nut is provided on the top side wall of the battery pack shell, a second through hole is provided on the inner wall of the battery pack shell, two groups of L-shaped brackets are provided at the bottom inner side of the battery pack shell, a first bent edge is provided at the opposite end of the bottom of the L-shaped bracket, a second rivet nut is provided at the top of the L-shaped bracket, and a third rivet nut is provided at the bottom of the L-shaped bracket.

[0007] As a further solution of the utility model: a second-layer mounting plate is installed in the battery pack shell, a fourth through hole and a sixth through hole corresponding to the second rivet nut are provided on the second-layer mounting plate, and a mounting assembly is provided on the second-layer mounting plate.

[0008] A battery module comprises a lithium battery module; the lithium battery module comprises an end plate, multiple groups of battery cells and an aluminum bar; a first epoxy plate is attached to the outer side of the battery cell, a partition is attached to the outer side wall of the first epoxy plate, a packing tape is provided on the end plate, multiple groups of battery cells, the first epoxy plate and the partition are mounted on the end plate by the packing tape, the aluminum bar is fixed to the battery cell by welding, a supporting foam is provided above the aluminum bar, and a cover plate is installed above the supporting foam.

[0009] As a further solution of the utility model: the end plate is provided with a tenth rivet nut, a plane, and an eighth through hole; the tenth rivet nut is arranged at the upper end of the end plate, and an insulator is fixed to the top of the end plate through the tenth rivet nut, the plane is arranged in the middle of the end plate for supporting the packing tape, the eighth through hole is arranged below the plane, and the lithium battery module is fixed by a bolt passing through the eighth through hole.

[0010] A battery pack using a sheet metal shell assembly and a battery module as described in any one of the above, comprising a plurality of lithium battery modules installed in a battery pack shell, wherein the plurality of lithium battery modules are separated into upper and lower layers by a two-layer mounting plate.

[0011] As a further solution of the utility model: the first bent edge is used to limit the position of the lithium battery module, and the third rivet nut is used to fix the lithium battery module through the eighth through hole.

[0012] Compared with the prior art, the beneficial effects of the utility model are: the battery pack shell and the second-layer mounting plate make it easier to fix the lithium battery module, and at the same time, the series connection of the lithium battery modules through the series copper busbars is more reasonable; by arranging a mounting assembly at one end of the second-layer mounting plate, the layout and installation of the electrical components related to the battery pack are more reasonable; the design of the battery pack shell and the second-layer mounting plate is more reasonable, and the second-layer mounting plate has the dual function of fixing the lithium battery module and the electrical components, which saves costs and optimizes the internal space of the battery pack shell, and also improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the side surface of the battery pack shell in the utility model.

[0014] Figure 2 It is a schematic diagram of the structure of the battery pack shell in the present invention when viewed from above.

[0015] Figure 3 For the utility model Figure 2 Schematic diagram of the structure at BB in the middle.

[0016] Figure 4 It is a structural schematic diagram of the second-layer mounting plate in the utility model.

[0017] Figure 5It is a schematic diagram of the structure of the second-layer installation plate in the utility model when viewed from above.

[0018] Figure 6 It is a structural schematic diagram of the front view of the second-layer installation plate in the utility model.

[0019] Figure 7 It is a schematic diagram of the structure of the lithium battery module in the utility model.

[0020] Figure 8 This is an exploded view of the lithium battery module in the present utility model.

[0021] Fig. 9 It is a structural schematic diagram of the middle end plate of the utility model.

[0022] Fig.10 It is a structural schematic diagram of the aluminum row in the utility model.

[0023] Fig.11 This is a schematic diagram of the installation of the second epoxy board, the series copper busbar, and the insulating sheet in the utility model.

[0024] In the figure: 1. lithium battery module; 2. battery pack shell; 3. second-layer mounting plate; 10. cover plate; 11. support foam; 12. aluminum bar; 13. first epoxy board; 14. partition; 15. battery cell; 16. insulator; 17. end plate; 18. packing tape; 20. first through hole; 21. second through hole; 22. third through hole; 23. first rivet nut; 24. second rivet nut; 25. first bending edge; 26. third rivet nut; 30. fourth through hole; 31 , the fifth through hole; 32, the sixth through hole; 33, the fourth self-clinching nut; 34, the fifth self-clinching nut; 35, the sixth self-clinching nut; 36, the seventh self-clinching nut; 37, the eighth self-clinching nut; 38, the ninth self-clinching nut; 39, the second bending edge; 101, the insulating sheet; 102, the series copper bus; 103, the second epoxy board; 121, the seventh through hole; 122, the self-clinching bolt; 123, the protrusion; 171, the tenth self-clinching nut; 172, the plane; 173, the eighth through hole. DETAILED DESCRIPTION

[0025] See also Figure 1-Figure 11In an embodiment of the utility model, a sheet metal shell assembly includes a battery pack shell 2; a first through hole 20 is provided at the end of the battery pack shell 2, and fixing blocks are provided on both sides of the battery pack shell 2. The fixing blocks are arranged in an array in multiple groups on both sides of the battery pack shell 2. Preferably, six groups are provided in this embodiment, and three groups are provided on one side of the battery pack shell 2. A third through hole 22 is provided on the fixing block, and two groups of the third through holes 22 are symmetrically provided on the fixing block. A first rivet nut 23 is provided on the top side wall of the battery pack shell 2, and the first rivet nut 23 is provided on the top side wall of the battery pack shell 2. There are multiple groups of arrays arranged along the top side wall of the battery pack shell 2, the inner wall of the battery pack shell 2 is provided with a second through hole 21, the second through hole 21 is a welding reserved hole, two groups of L-shaped brackets are fixedly arranged at the bottom of the battery pack shell 2, one group of L-shaped brackets is arranged at one end of the battery pack shell 2, and there is a gap between the other group of L-shaped brackets and the other end of the battery pack shell 2, the opposite end of the bottom of the L-shaped bracket is provided with a first bending edge 25, the top of the L-shaped bracket is provided with a second rivet nut 24, and the bottom of the L-shaped bracket is provided with a third rivet nut 26.

[0026] Further, preferably, a second-layer mounting plate 3 is installed in the battery pack shell 2, and a fourth through hole 30 and a sixth through hole 32 corresponding to the second rivet nut 24 are provided on the second-layer mounting plate 3. The second-layer mounting plate 3 is assembled in the battery pack shell 2 by the second rivet nut 24, the fourth through hole 30 and the sixth through hole 32. A mounting assembly is provided on the second-layer mounting plate 3, and the mounting assembly includes a fifth through hole 31, a fourth rivet nut 33, a fifth rivet nut 34, a sixth rivet nut 35, a seventh rivet nut 36 and an eighth rivet nut 37 arranged on the other end of the second-layer mounting plate 3 near the battery pack shell 2. The second-layer mounting plate 3 is used to fix the electrical board, the fifth rivet nut 34 is used to fix the fuse and the shunt, the sixth rivet nut 35 is used to fix the relay, the seventh rivet nut 36 is used to fix the pre-charging resistor, and the eighth rivet nut 37 is used to fix the pre-charging relay.

[0027] See also Figure 6-Figure 10Preferably, a battery module comprises a lithium battery module 1; the lithium battery module 1 comprises an end plate 17, a plurality of battery cells 15 and an aluminum row 12; a first epoxy plate 13 is attached to the outer side of the battery cell 15, a partition 14 is attached to the outer side wall of the first epoxy plate 13, a packing tape 18 is provided on the end plate 17, the plurality of battery cells 15, the first epoxy plate 13 and the partition 14 are mounted on the end plate 17 by the packing tape 18, the aluminum row 12 is fixed to the battery cell 15 by welding, and a supporting foam 11 is provided above the aluminum row 12 A cover plate 10 is installed above the supporting foam 11, and a tenth rivet nut 171, a plane 172, and an eighth through hole 173 are provided on the end plate 17. The tenth rivet nut 171 is arranged at the upper end of the end plate 17, and the insulator 16 is fixed to the top of the end plate 17 through the tenth rivet nut 171. The plane 172 is arranged in the middle of the end plate 17 for supporting the packing tape 18. The eighth through hole 173 is arranged below the plane 172, and the lithium battery module 1 is fixed by bolts passing through the eighth through hole 173.

[0028] A ninth rivet nut 38 and a second bending edge 39 are provided on the top of the second-layer mounting plate 3. The ninth rivet nut 38 is used to fix the lithium battery module 1 as a whole through the eighth through hole 173 on the end plate 17, and the second bending edge 39 is used to limit the lithium battery module 1.

[0029] See also Fig.10 Preferably, the aluminum bar 12 is provided with an array of seventh through holes 121. The seventh through holes 121 are used for serial connection between modules on the one hand, and for alignment with the hole position of the battery cell 15 during welding on the other hand. The aluminum bar 12 is symmetrically provided with rivet bolts 122 along the center. The rivet bolts 122 are used for fixing the collection harness and the temperature sensing harness. A protrusion 123 is provided between two adjacent groups of the seventh through holes 121 on the aluminum bar 12. The protrusion 123 can reduce the damage to the welding point of the aluminum bar 12 caused by vibration when the aluminum bar 12 is loaded and driven.

[0030] Preferably, in this embodiment, a three-in-one and four-in-one module is taken as an example. When in use, the battery cells 15 are separated by partitions 14. The partitions 14 are double-sidedly glued and compressible. They are mainly used to fix the battery cells 15 during assembly, and at the same time reserve a certain compression space for the battery cells 15 to expand during subsequent use. After the battery cells 15 are assembled according to a certain series-parallel relationship, the first epoxy plate 13 is attached to the outside of the battery cells 15. The first epoxy plate 13 is insulating to prevent short circuits between the battery cells 15 and the end plates 17. Then the partition 14 is attached to the outside of the first epoxy plate 13, and then installed on the end plates 17. The end plates 17 are mainly used to fix the lithium battery module 1, and finally the entire battery cell 15 is assembled with packaging tape 18.

[0031] The battery pack shell 2 is welded to the tab of the battery cell 15 by a laser welding machine, and then the supporting foam 11 is installed with 3M glue. The height of the supporting foam 11 is higher than the highest point of the aluminum bar 12, mainly to prevent short circuit when the module is accidentally pressurized. Finally, the entire upper part of the module is protected by a PC cover plate 10 to prevent the module from contacting external metal parts and causing a short circuit.

[0032] See also Figure 1-Figure 11 Preferably, a battery pack using a sheet metal shell assembly and a battery module as any one of the above, comprises a plurality of lithium battery modules 1 installed in a battery pack shell 2, and the plurality of lithium battery modules 1 are separated into upper and lower layers by a second-layer mounting plate 3, the first bent edge 25 is used to limit the lithium battery module 1, and the third rivet nut 26 is used to fix the lithium battery module 1 through the eighth through hole 173. Preferably, in this embodiment, six groups of lithium battery modules 1 are used, and are installed in the battery pack shell 2 in upper and lower layers and separated by a second-layer mounting plate 3, wherein related electrical components in the battery pack are also installed on the second-layer mounting plate 3, and the plurality of lithium battery modules 1 are away from the second layer. A series copper bus 102 is provided at one end of the layer mounting plate 3 where components are provided, and the series copper bus 102 is connected to the electrical components through the fifth through hole 31. When multiple groups of lithium battery modules 1 are installed in the battery pack shell 2, a second epoxy board 103 is required to be laid on the bottom of the battery pack shell 2 for insulation. An insulating sheet 101 is attached to the inside of the battery pack shell 2 near both ends of the lithium battery module 1 for insulation of the battery pack. After the lithium battery module 1 is arranged in the upper and lower layers with the correct positive and negative pole relationship, the entire lithium battery module 1 is connected in series through the series copper bus 102, and then the positive and negative poles of the module are connected to the electrical components, and the wires are output through the first through hole 20 to provide power to the outside.

[0033] In summary, the battery pack shell 2 and the second-layer mounting plate 3 make it easier to fix the lithium battery module 1, and it is more reasonable to connect the lithium battery modules 1 in series through the series copper bus 102; by arranging a mounting assembly at one end of the second-layer mounting plate 3, the layout and installation of electrical components related to the battery pack are more reasonable; the design of the battery pack shell 2 and the second-layer mounting plate 3 is more reasonable, and the second-layer mounting plate 3 has the dual function of fixing the lithium battery module 1 and electrical components, which saves costs and optimizes the internal space of the battery pack shell 2, and also improves production efficiency.

Claims

1. A sheet metal housing assembly, comprising a battery pack housing; characterized in that: A first through hole is provided at the end of the battery pack shell, two groups of L-shaped brackets are provided at the bottom of the battery pack shell, a first bending edge is provided at the opposite end of the bottom of the L-shaped bracket, a second rivet nut is provided at the top of the L-shaped bracket, and a third rivet nut is provided at the bottom of the L-shaped bracket.

2. A sheet metal housing assembly according to claim 1, characterized in that: Fixed blocks are provided on both sides of the battery pack shell, a third through hole is provided on the fixed blocks, a first rivet nut is provided on the top side wall of the battery pack shell, and a second through hole is provided on the inner wall of the battery pack shell.

3. A sheet metal housing assembly according to claim 2, characterized in that: A second-layer mounting plate is installed in the battery pack shell, a fourth through hole and a sixth through hole corresponding to the second rivet nut are provided on the second-layer mounting plate, and a mounting assembly is provided on the second-layer mounting plate.

4. A battery module, using the sheet metal housing assembly as claimed in any one of claims 1 to 3, characterized in that: It includes a lithium battery module, which includes an end plate, multiple groups of battery cells and an aluminum busbar; a first epoxy plate is attached to the outer side of the battery cell, a partition is attached to the outer side wall of the first epoxy plate, a packing tape is provided on the end plate, multiple groups of battery cells, the first epoxy plate and the partition are installed on the end plate by the packing tape, and the aluminum busbar is fixed to the battery cell by welding.

5. A battery module according to claim 4, characterized in that: A supporting foam is arranged above the aluminum row, and a cover plate is installed above the supporting foam.

6. A battery module according to claim 5, characterized in that: The end plate is provided with a tenth rivet nut, a plane, and an eighth through hole; the tenth rivet nut is arranged at the upper end of the end plate, and an insulator is fixed to the top of the end plate through the tenth rivet nut, the plane is arranged in the middle of the end plate for supporting the packing tape, the eighth through hole is arranged below the plane, and the lithium battery module is fixed by passing a bolt through the eighth through hole.

7. A battery pack, using the battery module as claimed in any one of claims 4 to 6, characterized in that: It includes multiple groups of lithium battery modules installed in the battery pack shell, and the multiple groups of lithium battery modules are separated into upper and lower layers by a two-layer mounting plate.

8. A battery pack according to claim 7, characterized in that: The first bent edge is used to limit the position of the lithium battery module, and the third rivet nut is used to fix the lithium battery module through the eighth through hole.

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