Busbar connection structure and battery pack

Abstract

The utility model provides a busbar connecting structure and a battery pack, the busbar connecting structure comprises a mounting groove arranged on a battery module and a connecting piece arranged on a busbar, the connecting piece is provided with an inserting part, and the inserting part can be inserted into the mounting groove through the elastic deformation of the inserting part and is clamped in the mounting groove. And thus, electric connection with the battery cells in the battery module is formed. According to the busbar connecting structure disclosed by the utility model, the mounting groove is formed in the battery module, the connecting piece is arranged on the busbar, and the connecting piece can be conveniently inserted and clamped in the mounting groove through the elastic deformation of the inserting part, so that the connecting piece is electrically connected with the battery cell in the battery module, and the busbar can be conveniently mounted and dismounted; and the maintenance and replacement efficiency of the battery cells and the busbars in the battery pack can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a busbar connection structure. The utility model also relates to a battery pack provided with the busbar connection structure. Background Art

[0002] The removable battery pack allows for easy replacement of battery cells. In the design of the removable battery pack, the bus is one of the key components, which is responsible for connecting multiple battery cells together inside the battery pack to achieve the transmission and distribution of electrical energy.

[0003] Currently, battery packs are usually unable to disassemble and repair the battery cells. Battery packs using the CTP (Cell to Pack, module-free power battery pack) design are fixed by glue and are inconvenient to disassemble. For traditional battery module solutions, although the battery module can be replaced, when a battery cell is damaged, the entire battery module usually needs to be replaced.

[0004] Existing detachable battery packs usually adopt an integrated design, that is, the busbar and the poles of each battery cell are connected together by welding. This design requires disconnecting the welding points one by one when the battery cell is disassembled, which is not convenient for repairing and replacing the battery cells and busbars in the battery pack. Utility Model Content

[0005] In view of this, the utility model aims to provide a busbar connection structure to facilitate the installation and removal of the busbar on the battery module, thereby improving the maintenance and replacement efficiency of the battery cells and the busbar.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A busbar connection structure includes a mounting groove arranged on a battery module, and a connector arranged on the busbar; the connector has a plug-in portion, and the plug-in portion can be inserted into the mounting groove through its own elastic deformation and clamped in the mounting groove to form an electrical connection with the battery cells in the battery module.

[0008] Furthermore, the mounting groove is arranged between poles of two adjacent battery cells in the battery module.

[0009] Furthermore, each pole is provided with a cover plate, and the adjacent poles, the cover plates on each pole, and the top cover of the battery cell together form the installation groove; the plug-in portion inserted in the installation groove forms an electrical connection with two adjacent poles.

[0010] Furthermore, a hollow hole is provided on the plug-in portion, and the plug-in portion realizes its own elastic deformation by contraction or recovery at the position of the hollow hole.

[0011] Furthermore, along the insertion direction of the connector, the hollow holes include a first hollow hole and a second hollow hole arranged in sequence, and in the width direction of the connector, the projections of the second hollow hole and the first hollow hole partially overlap.

[0012] Furthermore, the connector has a connecting portion for connecting to the bus bar, and the width of the connecting portion is greater than the width of the plug-in portion; and / or,

[0013] One end of the plug-in portion inserted into the mounting groove is arc-shaped.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The bus connection structure described in the utility model is characterized by arranging a mounting groove on the battery module and a connecting piece on the bus. The connecting piece can be conveniently inserted and clamped in the mounting groove through elastic deformation of the plug-in portion, thereby forming an electrical connection with the battery cells in the battery module, which can facilitate the installation and disassembly of the bus and is beneficial to improving the maintenance and replacement efficiency of the battery cells and the bus in the battery pack.

[0016] In addition, a mounting groove is provided between the poles of two adjacent cells in the module, which is conducive to fully utilizing the space and facilitating the electrical connection between the busbar and the cell. By providing a cover plate extending toward the adjacent pole on the pole and forming the mounting groove by using the poles of the cell and other structures, it is conducive to more fully utilizing the space and enabling the plug-in portion to directly form an electrical connection with the pole.

[0017] Secondly, the elastic deformation of the plug-in part is achieved by shrinking or restoring the position of the hollow hole, which is conducive to improving the elasticity of the plug-in part. Providing a plurality of hollow holes arranged in sequence on the connector is conducive to further improving the elasticity of the plug-in part. Providing a connecting portion with a width greater than the width of the plug-in part on the connector is conducive to improving the reliability of the connection between the connector and the busbar. The arc shape of the plug-in part can facilitate the insertion of the plug-in part into the installation groove.

[0018] Another object of the present invention is to provide a battery pack, wherein a battery module and a bus are provided in the battery pack, and at least a part of the bus is electrically connected to the battery module via the bus connection structure as described above.

[0019] Furthermore, the shell of the battery pack includes a lower shell, the battery module is arranged in the lower shell, and a cooling plate is provided above the battery module.

[0020] Furthermore, a vacuum adsorption structure is provided on the lower shell, and the battery module is fixed in the lower shell by the vacuum adsorption structure.

[0021] Furthermore, the lower shell includes a bottom plate, and a bottom guard plate arranged under the bottom plate; the vacuum adsorption structure includes a negative pressure cavity formed between the bottom guard plate and the bottom plate, and a suction port arranged on the bottom plate, the suction port is connected to the negative pressure cavity, and the battery module is bonded to the bottom plate corresponding to the suction port.

[0022] The battery pack described in the present invention and the busbar connection structure described above have the same beneficial effects as compared to the prior art.

[0023] In addition, by arranging the cooling plate above the battery module, the battery module can be pressed against the lower shell, thereby improving the reliability of the battery module installation. By arranging the vacuum adsorption structure, the battery module can be easily adsorbed and fixed in the lower shell, and the battery module can be easily disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the busbar according to an embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the output stage bus according to an embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the connecting piece according to an embodiment of the utility model;

[0028] Figure 4 This is a front view of the connecting member according to an embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the battery module according to an embodiment of the utility model;

[0030] Figure 6 An exploded view of a battery module according to an embodiment of the present utility model;

[0031] Figure 7 A schematic structural diagram of a battery module according to an embodiment of the utility model from another perspective;

[0032] Figure 8 for Figure 5 The enlarged view of point A in the middle;

[0033] Fig. 9 for Figure 7 The enlarged view of point B in the middle;

[0034] Fig.10 for Figure 6 Enlarged view of point C in the middle;

[0035] Fig.11 An exploded view of a battery pack according to an embodiment of the present utility model;

[0036] Fig.12 It is a structural schematic diagram of the lower box body described in an embodiment of the utility model.

[0037] Description of reference numerals:

[0038] 1. Connector; 11. Plug-in part; 111. Hollow hole; 1111. First hollow hole; 1112. Second hollow hole; 12. Connecting part; 2. Mounting groove; 3. Battery module; 31. Battery cell; 311. Post; 312. Cover plate; 313. Top cover; 32. Thermal insulation pad; 33. End plate; 4. Lower shell; 41. Bottom plate; 42. Adsorption port; 43. Exhaust hole; 5. Cooling plate; 6. Thermal conductive adhesive; 7. Rear crossbeam; 8. Bus. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0040] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0043] Embodiment 1

[0044] This embodiment relates to a busbar connection structure, which is combined with Figures 1 to 12 As shown, the busbar connection structure includes a mounting slot 2 provided on the battery module 3 and a connector 1 provided on the busbar 8 .

[0045] The connector 1 has a plug-in portion 11 , and the plug-in portion 11 can be inserted into the mounting slot 2 through its own elastic deformation and be clamped in the mounting slot 2 to form an electrical connection with the battery cell 31 in the battery module 3 .

[0046] As shown in the above structure, in the bus connection structure of this embodiment, the connector 1 can be conveniently inserted and clamped in the installation groove 2 through the elastic deformation of the plug-in portion 11, thereby forming an electrical connection with the battery cell 31 in the battery module 3, which can facilitate the installation and disassembly of the bus 8 and is beneficial to improving the maintenance and replacement efficiency of the battery cell 31 and the bus 8 in the battery pack.

[0047] Based on the above overall introduction, specifically, the connecting member 1 of this embodiment is provided in addition to being connected to the sampling assembly, for example Figure 1 In addition to being arranged on the busbar 8 shown, it is also arranged on the output busbar on the battery module 3. Meanwhile, the connector 1 of this embodiment is preferably made of aluminum material and is integrally formed by stamping to facilitate production and processing.

[0048] As a preferred embodiment, Figure 6 and Fig.10 As shown, the mounting groove 2 of this embodiment is provided between the poles 311 of two adjacent battery cells 31 in the battery module 3. At this time, the mounting groove 2 is provided between the poles 311 of two adjacent battery cells 31 in the battery module 3, which is conducive to fully utilizing the space and facilitating the electrical connection between the busbar 8 and the battery cell 31.

[0049] In this embodiment, as a preferred implementation, Fig.10 As shown, each pole 311 is provided with a cover plate 312, and adjacent poles 311, the cover plates 312 on the adjacent poles 311, and the top cover 313 of the battery cell 31 together form a mounting groove 2. In addition, the plug-in portion 11 inserted in the mounting groove 2 is electrically connected to two adjacent poles 311.

[0050] In specific implementation, the width of the installation groove 2 of this embodiment, that is, the distance between the poles 311 of two adjacent battery cells 31, is slightly larger than the width of the plug-in portion 11, so that when the plug-in portion 11 is inserted into the installation groove 2, it can be squeezed by the poles 311 and elastically deformed, and have an interference fit with the installation groove 2, so that it can be reliably clamped in the installation groove 2 and electrically connected to the poles 311 of the two adjacent battery cells 31.

[0051] In this way, the present embodiment arranges a cover plate 312 on the pole 311 that extends toward the adjacent pole 311 , and utilizes the pole 311 of the battery cell 31 and other structures to form the mounting groove 2 , which is conducive to more fully utilizing the space and enables the plug-in portion 11 to directly form an electrical connection with the pole 311 .

[0052] In detail, the cover plate 312 of the present embodiment is attached to the pole 311 of each battery cell 31 by, for example, screwing or integrally forming, and the distance between the cover plate 312 and the top cover 313 of the battery cell 31 is slightly larger than the thickness of the plug-in portion 11, so that the plug-in portion 11 can be reliably plugged in and stuck in the mounting groove 2, and is not easy to fall out of the mounting groove 2.

[0053] As a preferred embodiment, Figure 3 to Figure 4 As shown, the plug-in portion 11 of this embodiment is provided with a hollow hole 111, and the plug-in portion 11 realizes its own elastic deformation by contraction or restoration at the position of the hollow hole 111. At this time, the elastic deformation of the plug-in portion 11 is realized by contraction or restoration of the hollow hole 111, which is conducive to improving the elasticity of the plug-in portion 11.

[0054] During specific implementation, as a preferred implementation mode, Fig. 9 In the insertion direction of the connector 1 indicated by the middle arrow, the hollow holes 111 include a first hollow hole 1111 and a second hollow hole 1112 arranged in sequence. At the same time, in the width direction of the connector 1, the projections of the second hollow hole 1112 and the first hollow hole 1111 partially overlap. This is conducive to further improving the elasticity of the plug-in portion 11.

[0055] As a preferred embodiment, continue to refer to Figure 3 to Figure 4 As shown, the connector 1 of this embodiment has a connecting portion 12 for connecting to the busbar 8. Moreover, the width of the connecting portion 12 is greater than the width of the plug-in portion 11. At this time, the connection portion 12 having a width greater than the width of the plug-in portion 11 is provided on the connector 1, which is conducive to improving the reliability of the connection between the connector 1 and the busbar 8.

[0056] In specific implementation, in this embodiment, the connecting portion 12 on the connector 1 is connected to the bus 8 or the nickel sheet of the FPC (Flexible Printed Circuit) by, for example, welding, and the bus 8 is connected to a plurality of connectors 1 arranged one-to-one corresponding to the mounting slots 2, so that the bus 8 can be connected to each battery cell 31 in the battery module 3 through the plurality of connectors 1.

[0057] In order to facilitate the insertion of the plug-in portion 11 into the mounting groove 2, as a preferred embodiment, the end of the plug-in portion 11 of this embodiment that is inserted into the mounting groove 2 is arc-shaped. Of course, in a specific implementation, in addition to the arc shape, the end of the plug-in portion 11 can also adopt other shapes well known to those skilled in the art, such as a cone.

[0058] The bus connection structure of the present embodiment is provided with a mounting groove 2 on the battery module 3 and a connector 1 on the bus 8. The connector 1 can be conveniently inserted into and clamped in the mounting groove 2 through the elastic deformation of the plug-in portion 11, thereby forming an electrical connection with the battery cell 31 in the battery module 3, which can facilitate the installation and disassembly of the bus 8 and is beneficial to improving the maintenance and replacement efficiency of the battery cell 31 and the bus 8 in the battery pack.

[0059] Embodiment 2

[0060] This embodiment relates to a battery pack, which is provided with a battery module 3 and a bus bar 8, and at least part of the bus bar 8 is electrically connected to the battery module 3 through the bus bar connection structure in Embodiment 1. The structures not described in the battery pack may refer to the existing structures.

[0061] The battery pack of this embodiment can facilitate the maintenance and replacement of the battery cells 31 and the busbar 8 in the battery pack by applying the busbar connection structure in the first embodiment.

[0062] When implementing it, Figure 6 As shown, a heat insulating pad 32 is provided between each battery cell 31 of the battery module 3 of this embodiment, and an end plate 33 is provided at the end of the battery module 3. The heat insulating pad 32 can play a heat insulating role between the battery cells 31 and eliminate the gaps between the battery cells 31, so that the battery cells 31 form an integral battery module 3.

[0063] In detail, when assembling the battery module 3, the end plate 33 is first fixed, the battery cells 31 and the thermal insulation pads 32 are stacked in sequence, and then the bus 8 is connected to the mounting groove 2 through the connector 1, and finally the end plates 33 at both ends of the battery module 3 are pressed.

[0064] At the same time, the battery pack also includes a collection assembly with a bus 8, which includes, for example, an FPC, a bus 8 connected to the FPC, and an output-level bus, and the bus 8 and the output-level bus can both be electrically connected to the battery module 3 through the bus connection structure in Example 1.

[0065] In this embodiment, as a preferred implementation, Fig.11As shown, the housing of the battery pack of this embodiment includes a lower housing 4, the battery module 3 is arranged in the lower housing 4, and a cooling plate 5 is arranged above the battery module 3. At this time, by arranging the cooling plate 5 above the battery module 3, the battery module 3 can be pressed against the lower housing 4, thereby improving the reliability of the installation of the battery module 3.

[0066] In specific implementation, the lower housing 4 of this embodiment is formed by welding aluminum profiles, and a rear crossbeam 7 for further fixing the battery module 3 is screwed to the lower housing 4. The cooling plate 5 can be a product with cooling function well known to those skilled in the art, such as a liquid cooling plate.

[0067] Furthermore, when the cooling plate 5 is mounted on the lower housing 4, it can be pressed against the battery module 3 as a whole, and the battery module 3 can be firmly fixed in the lower housing 4. At the same time, a thermal conductive adhesive 6 is filled between the battery module 3 and the cooling plate 5 to facilitate heat conduction. It should be noted that the thermal conductive adhesive 6 in this embodiment has a low bonding strength and has no bonding and fixing function.

[0068] As a preferred embodiment, Fig.12 As shown, a vacuum adsorption structure is provided on the lower shell 4, and the battery module 3 is fixed in the lower shell 4 by the vacuum adsorption structure. In this way, by providing the vacuum adsorption structure, the battery module 3 can be easily adsorbed and fixed in the lower shell 4, and the battery module 3 can be easily disassembled.

[0069] In this embodiment, as a preferred implementation, the lower housing 4 includes a bottom plate 41 and a bottom guard plate provided below the bottom plate 41. The vacuum adsorption structure includes a negative pressure cavity formed between the bottom guard plate and the bottom plate 41, and an adsorption port 42 provided on the bottom plate 41. The adsorption port 42 is connected to the negative pressure cavity, and the battery module 3 is bonded to the bottom plate 41 corresponding to the adsorption port 42.

[0070] In specific implementation, the bottom plate 41 and the bottom guard plate are welded and sealed to form a negative pressure chamber, and a rectangular suction port 42 is provided on the bottom plate 41 of the lower housing 4. A sealant with relatively low bonding strength is applied around the suction port 42 of the bottom plate 41 to form a seal between the battery module 3 and the bottom plate 41.

[0071] By using an external negative pressure device such as a vacuum pump, connected to the air extraction hole 43 connected to the negative pressure chamber, the negative pressure chamber can be evacuated to allow the battery module 3 to be adsorbed on the bottom plate 41. At this time, the air extraction hole 43 is sealed by, for example, a sealing plug or a sealant to maintain negative pressure in the negative pressure chamber, and the battery module 3 can be reliably connected to the lower housing 4.

[0072] When assembling the battery pack of this embodiment, first apply sealant on the bottom plate 41 of the lower shell 4, lift the battery module 3 into the lower shell 4, and then screw the rear crossbeam 7 onto the lower shell 4. At this time, the battery module 3 is adsorbed into the lower shell by the vacuum adsorption structure. Finally, apply thermal conductive glue 6 on the battery module 3, and then install the cooling plate 5 on the lower shell 4 to complete the assembly of the battery pack.

[0073] When the battery cell 31 or bus bar 8 in the battery pack needs to be repaired or replaced, the battery pack cooling plate 5 is first disassembled, the thermal conductive glue 6 is cleaned, the rear crossbeam 7 on the housing 4 is then disassembled, and the sampling assembly including the bus bar 8 is removed. The sealing plug on the air extraction hole 43 is opened to release the pressure in the negative pressure chamber, the battery module 3 is removed, and the sealant at the bottom of the battery module 3 is cleaned, and then the faulty battery cell 31 can be replaced and the battery module 3 can be reinstalled.

[0074] The battery pack of this embodiment can facilitate the maintenance and replacement of the battery cells 31 and the busbar 8 in the battery pack by applying the busbar connection structure in the first embodiment, and can also facilitate the installation or removal of the battery module 3 on the lower shell 4.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A busbar connection structure, characterized in that: It includes a mounting slot provided on the battery module and a connecting piece provided on the busbar; The connector has a plug-in portion, and the plug-in portion can be inserted into the mounting groove through its own elastic deformation and clamped in the mounting groove to form an electrical connection with the battery cell in the battery module.

2. The busbar connection structure according to claim 1, characterized in that: The mounting groove is arranged between poles of two adjacent battery cells in the battery module.

3. The busbar connection structure according to claim 2, characterized in that: Each pole is provided with a cover plate, and the adjacent poles, the cover plates on each pole, and the top cover of the battery cell together form the installation groove; The plug-in portion inserted in the mounting groove forms an electrical connection with two adjacent poles.

4. The busbar connection structure according to claim 1, characterized in that: The plug-in portion is provided with a hollow hole, and the plug-in portion realizes its own elastic deformation by contraction or recovery at the position of the hollow hole.

5. The busbar connection structure according to claim 4, characterized in that: Along the insertion direction of the connector, the hollow holes include a first hollow hole and a second hollow hole arranged in sequence, and in the width direction of the connector, the projections of the second hollow hole and the first hollow hole partially overlap.

6. The busbar connection structure according to any one of claims 1 to 5, characterized in that: The connecting member has a connecting portion for connecting to the bus bar, and the width of the connecting portion is greater than the width of the plug-in portion; and / or, One end of the plug-in portion inserted into the mounting groove is arc-shaped.

7. A battery pack, characterized in that: The battery pack is provided with a battery module and a bus, and at least part of the bus is electrically connected to the battery module via the bus connection structure described in any one of claims 1 to 6.

8. The battery pack according to claim 7, characterized in that: The shell of the battery pack includes a lower shell, the battery module is arranged in the lower shell, and a cooling plate is arranged above the battery module.

9. The battery pack according to claim 8, characterized in that: The lower shell is provided with a vacuum adsorption structure, and the battery module is fixed in the lower shell by the vacuum adsorption structure.

10. The battery pack according to claim 9, characterized in that: The lower shell includes a bottom plate and a bottom guard plate arranged below the bottom plate; The vacuum adsorption structure includes a negative pressure cavity formed between the bottom guard plate and the bottom plate, and an adsorption port provided on the bottom plate, wherein the adsorption port is connected to the negative pressure cavity, and the battery module is bonded to the bottom plate corresponding to the adsorption port.

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