Battery cover plate and battery

Abstract

The utility model discloses a battery cover plate and a battery, the battery cover plate is used for the battery, the battery comprises a shell and a pole group positioned in the shell, the pole group is connected with a pole lug, the battery cover plate comprises a cover plate, a top plate and a pole column, and the cover plate is provided with a through hole; the top plate is located on the side, away from the pole group, of the cover plate and provided with a communicating hole communicating with the through hole. The pole is suitable for penetrating through the through hole and located in the communicating hole to be in threaded connection with the top plate. According to the battery cover plate disclosed by the utility model, the pole penetrates through the through hole, is positioned in the communicating hole and is in threaded connection with the top plate, so that the pole is convenient to disassemble, rework and maintain, and the maintenance cost of the battery cover plate can be reduced; and the pole is in bolted connection with the top plate, so that oxidation during welding of the pole and the top plate can be avoided, and the over-current safety of the battery cover plate can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover and a battery. Background Art

[0002] Lithium-ion batteries are widely used in electric vehicles and energy storage as power batteries, and the requirements for the performance and safety of lithium-ion batteries are increasing. In the related technology, the pole is installed on the cover plate by riveting the pole and the riveting block. Metal wire is easily generated during riveting, and it can also cause poor riveting and oxidation due to welding heat. When there is a problem with the relative position of the cover plate and the pole, it cannot be disassembled for repair. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cover, in which the pole is threadedly connected to the top plate, which can facilitate the disassembly and rework of the pole, reduce the maintenance cost of the battery cover, and improve the safety of the battery cover against overcurrent.

[0004] The utility model also provides a battery with the battery cover plate.

[0005] According to the battery cover plate of the first aspect of the utility model, the battery comprises a shell and a pole group located in the shell, the pole group is connected with a pole ear, and the battery cover plate comprises: a cover plate, the cover plate has a through hole; a top plate, the top plate is located on the side of the cover plate away from the pole group, the top plate has a connecting hole connected to the through hole; a pole column, the pole column is suitable for passing through the through hole and is located in the connecting hole and is threadedly connected to the top plate.

[0006] According to the battery cover plate of the embodiment of the utility model, the pole is passed through the through hole and is located in the connecting hole and is threadedly connected to the top plate, which is convenient for disassembly and rework and repair of the pole, and can reduce the maintenance cost of the battery cover plate; and the bolt connection between the pole and the top plate can avoid oxidation when the pole and the top plate are welded, thereby improving the safety of overcurrent of the battery cover plate.

[0007] According to some embodiments of the utility model, the battery cover plate also includes: a limit block, the connecting hole includes a first hole segment and a second hole segment, the pole is located in the first hole segment, the limit block is located in the second hole segment and is threadedly connected to the top plate, and the limit block abuts against the pole.

[0008] According to some embodiments of the utility model, the connecting hole is a cylindrical hole, the diameter of the first hole segment is larger than the diameter of the second hole segment, the first hole segment has a first internal thread, the second hole segment has a second internal thread, and the thread directions of the second internal thread and the first internal thread are opposite.

[0009] According to some embodiments of the present utility model, one side of the pole column facing the pole group has a first assembly slot, and one side of the limiting block facing away from the cover plate has a second assembly slot, and both the first assembly slot and the second assembly slot are adapted to cooperate with an installation tool.

[0010] According to some embodiments of the present utility model, the pole column includes a connecting portion and a body portion connected to one side of the connecting portion facing the pole group, the connecting portion passes through the through hole, the body portion is located on one side of the cover plate close to the pole group, and the body portion is fixedly connected to the pole ear.

[0011] According to some embodiments of the present utility model, the battery cover plate further includes: a first plastic part, and the first plastic part is located between the cover plate and the body portion.

[0012] According to some embodiments of the present utility model, the connecting portion is a cylinder, the diameter of the connecting portion is D, and it satisfies: D≥5 mm; the thickness of the body portion is H, and it satisfies: H≥1.5 mm.

[0013] According to some embodiments of the present utility model, the top plate includes an integrally formed metal part and a second plastic part, and at least part of the second plastic part is located on one side of the metal part facing the cover plate.

[0014] According to some embodiments of the present utility model, the battery cover plate further includes: a sealing ring, and the sealing ring is located between the pole column and the cover plate.

[0015] The battery according to the embodiment of the first aspect of the present utility model includes: the battery cover plate according to the above-mentioned first aspect embodiment of the present utility model.

[0016] The battery according to the embodiment of the present utility model, by providing the above-mentioned battery cover plate, facilitates the disassembly and rework repair of the pole column, can reduce the maintenance cost of the battery cover plate, and can also improve the over-current safety of the battery cover plate.

[0017] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic diagram of a battery cover plate according to some embodiments of the present utility model;

[0020] Figure 2 isFigure 1 Schematic diagram of another angle of the middle battery cover plate;

[0021] Figure 3 is Figure 1 Exploded view of the middle battery cover plate;

[0022] Figure 4 is Figure 2 Exploded view of another angle of the middle battery cover plate;

[0023] Figure 5 is Figure 1 Top view of the middle battery cover plate;

[0024] Figure 6 is Figure 5 Cross-sectional view along line A-A of the middle;

[0025] Figure 7 is Figure 6 Enlarged view at B of the middle;

[0026] Figure 8 Top view of the top plate according to some embodiments of the present utility model;

[0027] Figure 9 is Figure 8 Cross-sectional view along line C-C of the middle;

[0028] Figure 10 Top view of the pole column according to some embodiments of the present utility model;

[0029] Figure 11 is Figure 10 Front view of the pole column of the middle.

[0030] Reference numerals:

[0031] 100, battery cover plate;

[0032] 10, cover plate; 11, through hole;

[0033] 20, top plate; 21, metal part; 22, second plastic part; 23, communication hole; 231, first hole section; 233, second hole section;

[0034] 30, pole column; 31, connecting part; 311, first external thread; 32, body part; 321, first assembly card slot;

[0035] 40, limiting block; 41, second assembly card slot;

[0036] 51, first plastic part; 52, sealing ring. Detailed implementation manners

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] Reference below Figures 1 - 11 A battery cover 100 according to an embodiment of the present invention is described.

[0041] According to the battery cover 100 of the first aspect of the utility model, the battery cover 100 is used for a battery, the battery includes a shell and a pole group located in the shell, the pole group is connected to a pole ear, and the battery cover 100 is located at the opening of the shell, and is used to seal the pole group and the pole ear in the shell.

[0042] The battery cover 100 includes a cover 10, a top plate 20 and a pole 30. The top plate 20 is located on the side of the cover 10 away from the pole group. The cover 10 has a through hole 11, and the top plate 20 has a connecting hole 23. The connecting hole 23 is connected to the through hole 11. The pole 30 is suitable for being penetrated by the through hole 11 and is located in the connecting hole 23. The pole 30 is threadedly connected to the top plate 20, and the pole 30 is connected to the pole ear, which is used to introduce the current of the pole group into the top plate 20.

[0043] The terminal post 30 and the top plate 20 are detachably connected. When there is a deviation in the relative position between the terminal post 30 and the cover plate 10, the terminal post 30 can be disassembled and reassembled; or when the terminal post 30 has problems, it can be disassembled for repair or replacement, which can reduce the cost of the battery cover plate 100. In the related art, the terminal post 30 and the top plate 20 are fixed by riveting. During riveting, metal wires are likely to be generated, or there may be poor riveting pressure and oxidation during riveting welding heat, which has a certain impact on the safety of the terminal post 30. In this application, the terminal post 30 and the top plate 20 are connected by threads, which can improve the safety of the battery cover plate 100.

[0044] For example, the terminal post 30 has a first external thread 311, and the communication hole 23 has a first internal thread. Through the threaded connection of the first external thread 311 and the first internal thread, the terminal post 30 is detachably connected to the top plate 20.

[0045] According to the battery cover plate 100 of the embodiment of the present utility model, the terminal post 30 passes through the through hole 11 and is located in the communication hole 23 and is threadedly connected to the top plate 20, which is convenient for the disassembly and rework repair of the terminal post 30 and can reduce the repair cost of the battery cover plate 100; and the bolt connection between the terminal post 30 and the top plate 20 can prevent oxidation when the terminal post 30 and the top plate 20 are welded, and thus can improve the over-current safety of the battery cover plate 100.

[0046] According to some embodiments of the present utility model, referring to Figures 1 - 9 , the battery cover plate 100 further includes: a limiting block 40. The communication hole 23 includes a first hole section 231 and a second hole section 233. The terminal post 30 is located in the first hole section 231, and the terminal post 30 is threadedly connected to the first hole section 231. The limiting block 40 is located in the second hole section 233 and is threadedly connected to the top plate 20. The limiting block 40 abuts against the terminal post 30. The limiting block 40 is used to press the terminal post 30 to tighten the first internal thread of the terminal post 30 against the first external thread 311 in the first hole section 231, preventing the terminal post 30 from loosening when the battery shakes, and can improve the connection stability between the terminal post 30 and the top plate 20.

[0047] According to some embodiments of the present utility model, referring to Figures 1 - 9 , the communication hole 23 is a cylindrical hole. The diameter of the first hole section 231 is larger than the diameter of the second hole section 233. The second hole section 233 can play a role in limiting the terminal post 30, and can prevent the terminal post 30 from rotating excessively and squeezing the cover plate 10.

[0048] The first hole section 231 has a first internal thread, and the second hole section 233 has a second internal thread. The thread directions of the second internal thread and the first internal thread are opposite. Due to the opposite thread directions of the second internal thread and the first internal thread, when the terminal post 30 is tightened, the terminal post 30 will not drive the limit block 40 to rotate. Similarly, when the limit block 40 is tightened, the limit block 40 will not drive the terminal post 30 to rotate.

[0049] In a specific example, the terminal post 30 has a groove with an opening facing the limit block 40, and the limit block 40 has a protrusion that cooperates with the groove. When the protrusion is located within the groove, it can effectively hold up the terminal post 30 and prevent the terminal post 30 from loosening.

[0050] According to some embodiments of the present invention, referring to Figures 1 - 7 , one side of the terminal post 30 facing the electrode group has a first assembly card slot 321, and one side of the limit block 40 facing away from the cover plate 10 has a second assembly card slot 41. Both the first assembly card slot 321 and the second assembly card slot 41 are adapted to cooperate with an installation tool. Both the first assembly card slot 321 and the second assembly card slot 41 can be cross slots, which can cooperate with the installation tool. The installation tool can drive the terminal post 30 or the limit block 40 to rotate for installing the terminal post 30 and the limit block 40.

[0051] For example, the installation tool can be a cross wrench.

[0052] According to some embodiments of the present invention, referring to Figures 1 - 7 , the terminal post 30 includes a connecting portion 31 and a body portion 32. The body portion 32 is connected to one side of the connecting portion 31 facing the electrode group. The connecting portion 31 passes through the through hole 11, and the body portion 32 is located on the side of the cover plate 10 close to the electrode group. The body portion 32 is fixedly connected to the electrode tab, which is convenient for fixing the electrode tab.

[0053] According to some embodiments of the present invention, referring to Figures 1 - 7 , the battery cover plate 100 further includes: a first plastic part 51. The first plastic part 51 is located between the cover plate 10 and the body portion 32 and is used to isolate the contact between the cover plate 10 and the body portion 32, which can avoid short - circuit of the battery cover plate 100 and improve the safety of the battery cover plate 100. For example, the first plastic part 51 is a lower plastic.

[0054] According to some embodiments of the present invention, referring to Figures 1 - 11 , the connecting portion 31 is a cylinder, and the diameter of the connecting portion 31 is D, satisfying: D≥5mm. The current in the terminal post 30 is introduced to the top plate 20 through the connecting portion 31. Limiting the diameter of the connecting portion 31 within this range can ensure the over - current capacity of the battery. For example, the diameter of the connecting portion 31 can be 5mm, 6mm, 7mm or 8mm, etc.

[0055] The thickness of the main body portion 32 is H, satisfying: H≥1.5 mm. The main body portion 32 is welded to the tab. Limiting the thickness of the main body portion 32 within this range can ensure the welding strength between the tab and the main body portion 32. For example, the thickness of the main body portion 32 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, etc.

[0056] According to some embodiments of the present invention, referring to Figures 1 - 8 , the top plate 20 includes an integrally formed metal part 21 and a second plastic part 22. At least a part of the second plastic part 22 is located on the side of the metal part 21 facing the cover plate 10. It can be that a part of the second plastic part 22 is located on the side of the metal part 21 facing the cover plate 10, or the entire second plastic part 22 is located on the side of the metal part 21 facing the cover plate 10. The top plate 20 adopts an injection molding and overmolding process, and the overall structure is better; and the second plastic part 22 is located between the metal part 21 and the cover plate 10, which can play a role in isolating the metal part 21 and the cover plate 10, can avoid short - circuit of the battery cover plate 100, and can improve the safety of the battery. For example, the metal part 21 can be an aluminum plate.

[0057] For example, a receiving cavity with an open side can be defined in the second plastic part 22, and the metal part 21 is located in the receiving cavity, and the second plastic part 22 can cover the bottom and the circumferential outer side of the metal part 21.

[0058] According to some embodiments of the present invention, referring to Figures 1 - 7 , the battery cover plate 100 further includes: a sealing ring 52. The sealing ring 52 is located between the pole column 30 and the cover plate 10. The sealing ring 52 is used to isolate the pole column 30 and the cover plate 10, can avoid short - circuit of the battery cover plate 100, and can improve the safety of the battery. When installing the pole column 30, the up - and - down height of the pole column 30 can be adjusted to compress the sealing ring 52 within a reasonable range.

[0059] The battery according to the embodiment of the first aspect of the present invention includes: the battery cover plate 100 according to the above - mentioned first - aspect embodiment of the present invention.

[0060] The battery according to the embodiment of the present invention, by providing the above - mentioned battery cover plate 100, facilitates the disassembly and rework repair of the pole column 30, can reduce the maintenance cost of the battery cover plate 100, and can also improve the over - current safety of the battery cover plate 100.

[0061] In the description of this specification, the descriptions referring to terms such as "some embodiments", "optionally", "furthermore", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0062] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery cover for a battery, characterized in that: The battery comprises a housing and a pole group located in the housing, the pole group is connected with a pole lug, and the battery cover comprises: A cover plate, wherein the cover plate has a through hole; A top plate, the top plate is located on a side of the cover plate away from the electrode group, and the top plate has a connecting hole connected to the through hole; A pole, wherein the pole is suitable for passing through the through hole and being located in the communicating hole and connected with the top plate by threads.

2. The battery cover according to claim 1, characterized in that: Also includes: The limiting block, the communicating hole comprises a first hole section and a second hole section, the pole is located in the first hole section, the limiting block is located in the second hole section and is threadedly connected to the top plate, and the limiting block abuts against the pole.

3. The battery cover according to claim 2, characterized in that: The connecting hole is a cylindrical hole, the diameter of the first hole section is larger than the diameter of the second hole section, the first hole section has a first internal thread, the second hole section has a second internal thread, and the second internal thread and the first internal thread have opposite thread directions.

4. The battery cover according to claim 2, characterized in that: The pole has a first assembly slot on one side facing the pole group, and the limit block has a second assembly slot on one side facing away from the cover plate. Both the first assembly slot and the second assembly slot are suitable for cooperating with installation tools.

5. The battery cover according to claim 1, characterized in that: The pole comprises a connecting portion and a main body connected to the connecting portion on a side facing the pole group, the connecting portion is passed through the through hole, the main body is located on a side of the cover plate close to the pole group, and the main body is fixedly connected to the pole ear.

6. The battery cover according to claim 5, characterized in that: Also includes: A first plastic part, wherein the first plastic part is located between the cover plate and the main body.

7. The battery cover according to claim 5, characterized in that: The connecting portion is a cylinder, the diameter of the connecting portion is D, and the following conditions are met: D≥5mm; and / or the thickness of the main body portion is H, and the following conditions are met: H≥1.5mm.

8. The battery cover according to claim 1, characterized in that: The top plate includes an integrally formed metal component and a second plastic component, and at least a portion of the second plastic component is located on a side of the metal component facing the cover plate.

9. The battery cover according to claim 1, characterized in that: Also includes: A sealing ring is located between the pole and the cover plate.

10. A battery, characterized in that: include: The battery cover according to any one of claims 1 to 9.

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