Battery structure and vehicle

Abstract

The utility model relates to the technical field of vehicles, and provides a battery structure and a vehicle. The battery structure comprises a battery body and cover plate assemblies arranged at the two ends of the battery body, the battery body comprises a battery cell and tabs arranged at the two ends of the battery cell, the tabs are bent, and a bent space is defined by the tabs and the battery cell; the cover plate assembly comprises a cover plate and a welding plate, the welding plate is arranged in the bending space, the welding plate and the cover plate are arranged at an interval, a containing cavity is formed between the welding plate and the cover plate, and at least part of the tabs are arranged in the containing cavity. According to the battery structure provided by the invention, the cover plate assembly and the tab at least partially coincide in thickness, so that the space occupied by the cover plate assembly can be reduced, and by reducing the space occupied by the invalid part at the end part of the battery structure, the overall effective space utilization rate of the battery structure can be improved, the battery cell capacity and the energy density can be improved, and thus the endurance mileage of the whole vehicle is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicles, and particularly to a battery structure and a vehicle. Background Art

[0002] When assembling existing batteries, the positive and negative electrode tabs of the battery cells need to be welded to the tab welding plates on the positive and negative electrode covers respectively. After the battery cells are put into the shell, a battery is finally formed. The thickness at both ends of the battery is limited by the sum of the thickness of the tab itself, the thickness of the tab welding plate, and the thickness of the positive and negative electrode covers. In a specific-sized space on the vehicle body, the thicker the thickness at both ends of the battery, the larger the occupied space, which will compress the space of the battery cells, affect the battery cell capacity and energy density, and reduce the vehicle's endurance. Summary of the Utility Model

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a battery structure and a vehicle.

[0004] A first aspect of the present disclosure provides a battery structure, including a battery body and a cover plate assembly provided at both ends of the battery body. The battery body includes battery cells and electrode tabs provided at both ends of the battery cells. The electrode tabs are bent and jointly enclose a bent space with the battery cells.

[0005] The cover plate assembly includes a cover plate and a welding plate. The welding plate is provided in the bent space. The welding plate is spaced from the cover plate, and an accommodation cavity is formed between the welding plate and the cover plate. At least part of the electrode tabs are provided in the accommodation cavity.

[0006] Optionally, the electrode tab includes a first folded edge, a second folded edge, and a third folded edge;

[0007] The first folded edge is connected to the battery cell. The second folded edge is angularly connected to the first folded edge. The third folded edge is angularly connected to the second folded edge. The first folded edge, the second folded edge, and the third folded edge jointly enclose the bent space, and the third folded edge is provided in the accommodation cavity.

[0008] Optionally, the cover plate assembly further includes a pole column. One end of the pole column is connected to the cover plate, and the other end is connected to the welding plate. A limiting piece is provided on the outer side wall of the pole column and extends along the circumferential direction. The limiting piece supports between the welding plate and the cover plate.

[0009] Optionally, a through hole is provided on the cover plate. A connecting block is provided on the side of the cover plate away from the welding plate. One end of the pole column passes through the through hole and is riveted and matched with the connecting block. The other end of the pole column is welded to the welding plate.

[0010] Optionally, a seal is provided between the outer wall of the terminal post and the inner wall of the through hole.

[0011] And / or, a first rubber frame is provided between the connecting block and the cover plate.

[0012] Optionally, the cover plate assembly further includes a second rubber frame, which is disposed on the side of the cover plate facing the welding plate, and the accommodation cavity is formed between the second rubber frame and the welding plate.

[0013] Optionally, a relief groove is formed on the side of the second rubber frame facing the welding plate by being recessed in a direction away from the welding plate, and the accommodation cavity is defined jointly by the bottom wall of the relief groove and the welding plate.

[0014] Optionally, the cover plate assembly further includes an explosion-proof valve, which is disposed on the cover plate.

[0015] Optionally, the cover plate assembly further includes a spacer ring, which abuts between the cover plate and the battery cell, and an avoidance space is provided on the spacer ring, and the welding plate and at least part of the tab are disposed in the avoidance space.

[0016] A second aspect of the present disclosure provides a vehicle, including the battery structure as described in any one of the above.

[0017] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art:

[0018] The battery structure and the vehicle provided by the present disclosure include a battery body and a cover plate assembly disposed at both ends of the battery body. The battery body includes a battery cell and tabs disposed at both ends of the battery cell. The tabs are bent and jointly define a bent space with the battery cell. By setting it in this way, the end space of the battery body occupied by the tabs can be reduced. The cover plate assembly includes a cover plate and a welding plate. The welding plate is disposed in the bent space, that is, the thickness of the welding plate coincides with the thickness of a part of the bent space of the tab. The welding plate and the cover plate are spaced apart, and an accommodation cavity is formed between the welding plate and the cover plate. At least part of the tab is disposed in the accommodation cavity, that is, the thickness of at least part of the tab coincides with the thickness of the accommodation cavity on the cover plate assembly. That is to say, at least part of the thickness of the cover plate assembly coincides with that of the tab, and further the space occupied by the cover plate assembly can be reduced. By reducing the space occupied by the ineffective parts at the end of the battery cell, the overall effective space utilization rate of the battery structure can be improved, the battery cell capacity and energy density can be increased, and thus the cruising range of the whole vehicle can be improved. Description of the Drawings

[0019] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0020] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic structural diagram of a battery structure according to an embodiment of the present utility model;

[0022] Figure 2 Exploded view of a battery structure according to an embodiment of the present utility model;

[0023] Figure 3 Partial cross-sectional view of a battery structure according to an embodiment of the present utility model;

[0024] Figure 4 Schematic structural diagram of a cover plate assembly according to an embodiment of the present utility model;

[0025] Figure 5 Schematic structural diagram of a cover plate assembly from another perspective according to an embodiment of the present utility model;

[0026] Figure 6 Partial cross-sectional view of a cover plate assembly according to an embodiment of the present utility model;

[0027] Figure 7 Exploded view of a cover plate assembly according to an embodiment of the present utility model;

[0028] Figure 8 Schematic structural diagram of a cover plate assembly according to another embodiment of the present utility model;

[0029] Figure 9 Schematic structural diagram of a cover plate assembly from another perspective according to another embodiment of the present utility model;

[0030] Figure 10 Exploded view of a cover plate assembly according to another embodiment of the present utility model;

[0031] Figure 11 One of the assembly schematic diagrams of a battery structure according to an embodiment of the present utility model;

[0032] Figure 12 Another assembly schematic diagram of a battery structure according to an embodiment of the present utility model;

[0033] Figure 13 Another assembly schematic diagram of a battery structure according to an embodiment of the present utility model;

[0034] Figure 14 Another assembly schematic diagram of a battery structure according to an embodiment of the present utility model;

[0035] Figure 15 The fifth assembly schematic diagram of the battery structure according to an embodiment of the present utility model;

[0036] Figure 16 The sixth assembly schematic diagram of the battery structure according to an embodiment of the present utility model.

[0037] In the figure: 1. Cover assembly; 11. Cover; 111. Through hole; 112. Explosion-proof valve; 12. Welding plate; 13. Terminal post; 131. Conductive contact; 132. Limiting piece; 14. Accommodating cavity; 15. Connecting block; 16. Sealing member; 17. First rubber frame; 18. Second rubber frame; 181. Avoidance groove; 19. Spacer ring; 191. Avoidance space; 2. Battery body; 21. Tab; 211. First folded edge; 212. Second folded edge; 213. Third folded edge; 214. Bending space; 22. Battery cell; 23. Top patch; 24. Shell; 25. Protective film; 26. Blue film. Detailed implementation manners

[0038] In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other.

[0039] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0040] The battery structure and the vehicle will be described in detail below through specific embodiments:

[0041] Referring to Figures 1 to 16 As shown, a battery structure provided by some embodiments of the present utility model includes a battery body 2 and a cover assembly 1 disposed at both ends of the battery body.

[0042] Among them, the battery body 2 includes a battery cell 22 and tabs 21 disposed at both ends of the battery cell 22. The tabs 21 are bent and jointly enclose a bending space 214 with the battery cell 22. By setting like this, the end space of the battery body 2 occupied by the tabs 21 can be reduced.

[0043] In specific implementation, the cover plate assembly 1 includes a cover plate 11 and a welding plate 12. The welding plate 12 is disposed within the bending space 214, that is, the thickness of the welding plate 12 coincides with the thickness of a part of the bending space 214 of the tab 21. The welding plate 12 is spaced apart from the cover plate 11, and an accommodation cavity 14 is formed between the welding plate 12 and the cover plate 11. At least a part of the tab 21 is disposed within the accommodation cavity 14, that is, the thickness of at least a part of the tab 21 coincides with the thickness of the accommodation cavity 14 on the cover plate assembly 1. That is to say, at least a part of the thickness of the cover plate assembly 1 coincides with that of the tab 21. Furthermore, the space occupied by the cover plate assembly 1 can be reduced. By reducing the space occupied by the ineffective part at the end of the battery cell 22, the overall effective space utilization rate of the battery structure can be improved, the battery cell capacity and energy density can be increased, and thus the cruising range of the whole vehicle can be improved.

[0044] In some embodiments, referring to Figure 3 as shown, the tab 21 includes a first folded edge 211, a second folded edge 212, and a third folded edge 213. The first folded edge 211 is connected to the battery cell 22. The second folded edge 212 is angularly connected to the first folded edge 211. The third folded edge 213 is angularly connected to the second folded edge 212. The first folded edge 211, the second folded edge 212, and the third folded edge 213 are connected in sequence and jointly enclose a bending space 214. The welding plate 12 is disposed between the first folded edge 211 and the third folded edge 213 so that there is a partial coincidence between the distance between the first folded edge 211 and the third folded edge 213 and the thickness of the welding plate 12. The third folded edge 213 is disposed within the accommodation cavity 14 so that there is a partial coincidence between the thickness of the third folded edge 213 and the thickness of the accommodation cavity 14, in order to reduce the space occupied by the cover plate assembly 1.

[0045] Furthermore, the third folded edge 213 is parallel to the side surface of the battery cell 22 to further reduce the end space occupied by the third folded edge 213 and improve the overall effective space utilization rate of the battery structure.

[0046] Of course, the tab 21 can also be bent by other bending methods as long as it can jointly enclose a bending space 214 with the battery cell 22 to accommodate the welding plate 12. The present disclosure does not limit this and can be specifically set according to actual requirements.

[0047] In some embodiments, the cover plate assembly 1 of the present disclosure further includes a terminal post 13. One end of the terminal post 13 is connected to the cover plate 11, and the other end is connected to the welding plate 12, that is, the connection and fixation between the cover plate 11 and the welding plate 12 can be realized through the terminal post 13. In specific implementation, the terminal post 13 is electrically connected to the welding plate 12, and the welding plate 12 is electrically connected to the tab 21 of the battery body 2, that is, the terminal post 13 can be electrically connected to the tab 21 through the welding plate 12 to transmit electrical signals.

[0048] Referring to Figure 6 and Figure 7As shown, a limiting piece 132 is arranged on the outer side wall of the pole column 13 and extends along the circumferential direction. The limiting piece 132 is supported between the welding plate 12 and the cover plate 11. It can be understood that after the welding plate 12 is connected to the cover plate 11, the limiting piece 132 can be supported between the welding plate 12 and the cover plate 11, and then an accommodating cavity 14 is formed at a position outside the limiting piece 132 between the welding plate 12 and the cover plate 11, so as to avoid the pole ear 21 being crushed through the limiting and supporting effect of the limiting piece 132.

[0049] In specific implementation, the number of pole columns 13 is two, and the accommodating cavity 14 is formed between the two pole columns 13. Through the limiting and supporting of the two pole columns 13, a structurally stable accommodating cavity 14 can be formed to ensure the service life of the pole ear 21.

[0050] Specifically, a through hole 111 is formed in the cover plate 11, and a connecting block 15 is arranged on the side of the cover plate 11 away from the welding plate 12. One end of the pole column 13 passes through the through hole 111 and is riveted to the connecting block 15, and the other end of the pole column 13 is welded to the welding plate 12. That is to say, after the pole column 13 passes through the through hole 111 on the cover plate 11, the cover plate 11 can be limited between the connecting block 15 and the welding plate 12, thereby realizing the assembly among the cover plate 11, the welding plate 12 and the pole column 13.

[0051] Refer to Figure 6 As shown, a through hole is arranged in the connecting block 15 corresponding to the through hole 111, and the pole column 13 is arranged in the through hole to realize the riveting cooperation between the pole column 13 and the connecting block 15. Further, after the pole column 13 passes through the through hole 111 and the through hole, a conductive contact 131 can be formed at one end away from the welding plate 12. The conductive contact 131 can be electrically connected to the pole ear 21 of the battery body 2, and then power is supplied to the outside through the conductive contact 131.

[0052] In specific implementation, the connection between the pole column 13 and the welding plate 12 can be realized by welding. The pole ear 21 arranged in the accommodating cavity 14 can be connected to the welding plate 12 by welding, so that the electrical signal on the pole ear 21 can be supplied to the outside of the battery structure through the welding plate 12 and the pole column 13 in sequence.

[0053] Of course, it should be noted that the connection between the pole column 13 and the welding plate 12, and the connection between the pole column 13 and the connecting block 15 can also be realized by other connection methods. The present disclosure does not limit this and can be specifically set according to actual needs.

[0054] Further, refer to Figure 6As shown, a seal 16 is provided between the outer wall of the terminal post 13 and the inner wall of the through hole 111 to isolate the inside and outside of the battery structure through the seal 16 and ensure the sealing performance of the battery structure. Specifically, the seal 16 abuts between the terminal post 13 and the through hole 111, which can prevent external impurities from entering the interior of the battery structure or prevent the electrolyte inside the battery structure from flowing out.

[0055] In some embodiments, referring to Figure 2 As shown, the battery structure further includes a housing 24. The battery body 2 is disposed inside the housing 24, and the cover plate assemblies 1 are located at both ends of the housing 24 to close both ends of the housing 24 through the cover plate assemblies 1, thereby providing a relatively sealed working environment for the battery body 2, ensuring the safety of the battery body 2, and extending the service life.

[0056] Furthermore, continuing to refer to Figure 2 As shown, a protective film 25 is disposed on the surface of the battery cell 22, and a blue film 26 is disposed outside the housing 24. The protective film 25 can protect the battery cell 22, and the blue film 26 can protect the battery body 2, as well as ensure the appearance and aesthetics of the battery body 2.

[0057] In specific implementation, the number of tabs 21 is two. The two tabs 21 are respectively a positive tab and a negative tab. The cover plate assemblies 1 at both ends respectively serve as a positive cover plate and a negative cover plate, and are respectively connected to the positive tab and the negative tab to form a positive contact and a negative contact outside the housing 24.

[0058] In some embodiments, referring to Figure 7 and Figure 10 As shown, a first rubber frame 17 is provided between the connecting block 15 and the cover plate 11. It can be understood that the cover plate 11 is a light aluminum sheet. Through the first rubber frame 17, it is possible to prevent the connecting block 15 from causing damage such as knocking and scratching to the cover plate 11, and improve the service performance of the cover plate assembly 1.

[0059] Continuing to refer to Figure 7 and Figure 10 As shown, the cover plate assembly 1 further includes a second rubber frame 18. The second rubber frame 18 is disposed on the side of the cover plate 11 facing the welding plate 12 to prevent the welding plate 12 from causing damage such as knocking and scratching to the cover plate 11 through the second rubber frame 18. An accommodation cavity 14 is formed between the second rubber frame 18 and the welding plate 12, that is, at least part of the tabs 21 are limited between the second rubber frame 18 and the welding plate 12.

[0060] Furthermore, referring to Figure 4 and Figure 8As shown, on the side of the second glue frame 18 facing the welding plate 12, a relief groove 181 is recessed in the direction away from the welding plate 12. The bottom wall of the relief groove 181 and the welding plate 12 jointly enclose a receiving cavity 14, so as to avoid increasing the thickness of the cover plate assembly 1 while increasing the thickness of the receiving cavity 14, enabling the thickness of the receiving cavity 14 to adapt to the thickness of the tab 21, preventing the tab 21 from being overly compressed in the receiving cavity 14, and reducing the space occupied by the cover plate assembly 1, thereby improving the overall effective space utilization rate of the battery structure.

[0061] In some embodiments, referring to Figure 10 As shown, the cover plate assembly 1 further includes an explosion-proof valve 112, and the explosion-proof valve 112 is provided on the cover plate 11. Further, a protective film is also provided on the surface of the explosion-proof valve 112 to prevent the explosion-proof valve 112 from being directly exposed to the air and to prevent impurities such as dust and water vapor from falling on the surface of the explosion-proof valve 112.

[0062] In some embodiments, referring to Figure 3 As shown, the cover plate assembly 1 further includes a spacer 19. The spacer 19 abuts between the cover plate 11 and the battery cell 22 of the battery body 2. An avoidance space 191 is provided on the spacer 19, and the welding plate 12 and at least part of the tab 21 are arranged in the avoidance space 191. With this arrangement, the spacer 19 can be limited and supported between the cover plate 11 and the battery cell 22, and the welding plate 12 and at least part of the tab 21 are accommodated in the avoidance space 191. The spacer 19 can provide a receiving space for the welding plate 12 and the tab 21 while preventing the cover plate assembly 1 from overly pressing the battery cell 22 and the tab 21 on the battery cell 22, achieving the purpose of protecting the tab 21.

[0063] Some other embodiments of the present disclosure provide a vehicle, including the battery body 2 as described in any of the above embodiments.

[0064] The vehicle provided by the embodiments of the present disclosure includes the battery body 2 as described in any of the above embodiments, and thus has the beneficial effects of the battery body 2 as described in any of the above embodiments, which will not be elaborated here.

[0065] Referring to Figure 11 As shown, during the assembly of the battery structure, first, pre-weld and cut the tabs 21 of the battery cell 22, and bend the tabs 21 to form a bending space 214; referring to Figure 12 As shown, weld the tab 21 to the welding plate 12, and arrange the welding plate 12 in the bending space 214; referring to Figure 13 As shown, weld the welding plate 12 at one end of the battery cell 22 to the pole post 13; then referring to Figure 14 As shown, install the battery cell 22 into the housing 24, and complete the assembly of the welding plate 12 and the cover plate 11 and other structures; after the pressing on one side is completed, referring to Figure 15As shown, the welding plate 12 on the other side is welded to the terminal post 13, and the pressing and pre-welding of structures such as the cover plate 11 are completed until the Figure 16 battery structure shown is formed. Finally, the top patches 23 can be provided at both ends of the battery structure to complete the assembly of the battery structure.

[0066] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0067] The above are only specific embodiments of the present disclosure to enable those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery structure, characterized in that: The battery body (2) comprises a battery body (2) and a cover plate assembly (1) arranged at two ends of the battery body (2); the battery body (2) comprises a battery cell (22) and pole ears (21) arranged at two ends of the battery cell (22); the pole ears (21) are bent and together with the battery cell (22) enclose a bending space (214); The cover plate assembly (1) comprises a cover plate (11) and a welding plate (12); the welding plate (12) is arranged in the bending space (214); the welding plate (12) and the cover plate (11) are spaced apart; a receiving cavity (14) is formed between the welding plate (12) and the cover plate (11); and at least a portion of the pole lug (21) is arranged in the receiving cavity (14).

2. The battery structure according to claim 1, characterized in that: The pole ear (21) comprises a first folded edge (211), a second folded edge (212) and a third folded edge (213); The first folded edge (211) is connected to the battery core (22), the second folded edge (212) is connected to the first folded edge (211) at an angle, the third folded edge (213) is connected to the second folded edge (212) at an angle, the first folded edge (211), the second folded edge (212) and the third folded edge (213) together enclose the bending space (214), and the third folded edge (213) is arranged in the accommodating cavity (14).

3. The battery structure according to claim 1, characterized in that: The cover plate assembly (1) further comprises a pole (13), one end of the pole (13) being connected to the cover plate (11), and the other end being connected to the welding plate (12), a limiting plate (132) being provided on the outer side wall of the pole (13) extending in a circumferential direction, and the limiting plate (132) being supported between the welding plate (12) and the cover plate (11).

4. The battery structure according to claim 3, characterized in that: The cover plate (11) is provided with a through hole (111), a connecting block (15) is provided on a side of the cover plate (11) away from the welding plate (12), one end of the pole (13) passes through the through hole (111) and is riveted to the connecting block (15), and the other end of the pole (13) is welded to the welding plate (12).

5. The battery structure according to claim 4, characterized in that: A sealing member (16) is provided between the outer wall of the pole (13) and the inner wall of the through hole (111); And / or, a first rubber frame (17) is provided between the connecting block (15) and the cover plate (11).

6. The battery structure according to any one of claims 1 to 5, characterized in that: The cover plate assembly (1) further comprises a second rubber frame (18), wherein the second rubber frame (18) is arranged on a side of the cover plate (11) facing the welding plate (12), and the accommodating cavity (14) is formed between the second rubber frame (18) and the welding plate (12).

7. The battery structure according to claim 6, characterized in that: The second rubber frame (18) is recessed on one side of the welding plate (12) in a direction away from the welding plate (12) to form an avoidance groove (181), and the groove bottom wall of the avoidance groove (181) and the welding plate (12) together enclose the accommodating cavity (14).

8. The battery structure according to any one of claims 1 to 5, characterized in that: The cover plate assembly (1) further comprises an explosion-proof valve (112), wherein the explosion-proof valve (112) is arranged on the cover plate (11).

9. The battery structure according to any one of claims 1 to 5, characterized in that: The cover plate assembly (1) further comprises a spacer (19), wherein the spacer (19) is abutted between the cover plate (11) and the battery cell (22), an escape space (191) is provided on the spacer (19), and the welding plate (12) and at least a portion of the pole lug (21) are arranged in the escape space (191).

10. A vehicle, characterized in that: Comprising the battery structure according to any one of claims 1 to 9.

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