Battery top cover and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover and a single battery, the battery top cover comprises a top cover sheet, a first plastic part, a pole and a sealing ring, the top cover sheet comprises a first mounting hole and a first surface facing a battery shell, the first plastic part is arranged on the first surface, and the pole is arranged on the first mounting hole. The first plastic part is provided with a second mounting hole with the aperture larger than that of the first mounting hole, the pole comprises a base and a pole body, the base is located on the side, away from the first surface, of the first plastic part, one end of the pole body is connected with the base, and the other end of the pole body penetrates through the second mounting hole and the first mounting hole; the column body is sleeved with the first sealing section which is tightly pressed between the base and the edge of the first mounting hole, the second sealing section is connected with the side, away from the column body, of the first sealing section and is tightly pressed between the base and the edge of the second mounting hole, and the first sealing section and the second sealing section can cut off a conduction path of electrolyte in the battery shell; and the probability of micro short circuit of the single battery is reduced.

Description

Technical Field

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

[0002] The battery shell of the single battery is usually filled with electrolyte, the battery core is immersed in the electrolyte, and the battery top cover is sealed at the opening of the battery shell to form a sealed space inside the battery shell.

[0003] During the use of a single battery, the electrolyte in the battery shell can easily enter the inside of the battery cover. If the electrolyte flows to the gap between the electrode and the battery cover and crystallizes, the electrode can be electrically connected to the battery cover through the crystal, causing a micro short circuit problem, reducing the safety and performance of the single battery.

[0004] Therefore, it is urgent to propose a battery top cover and a single cell to solve the above technical problems. Utility Model Content

[0005] The first purpose of the utility model is to provide a battery top cover, which can block the conductive path of the electrolyte in the battery shell, so that the electrolyte in the battery shell cannot enter the gap between the pole and the top cover sheet, thereby reducing the probability of micro short circuit problems in single cells.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Battery cover, including:

[0008] A top cover sheet, the top cover sheet comprising a first surface and a first mounting hole, the first surface being configured to face the battery housing;

[0009] A first plastic part, the first plastic part is arranged on the first surface, the first plastic part is provided with a second mounting hole, and the aperture of the second mounting hole is larger than the aperture of the first mounting hole;

[0010] The pole comprises a base and a column, wherein the base is located on a side of the first plastic part away from the first surface, one end of the column is connected to the base, and the other end is passed through the second mounting hole and the first mounting hole;

[0011] The sealing ring includes a first sealing section and a second sealing section. The first sealing section is sleeved on the column and is pressed between the base and the edge of the first mounting hole. The second sealing section is connected to the side of the first sealing section away from the column and is pressed between the base and the edge of the second mounting hole.

[0012] Optionally, a first groove is provided on the first surface, the first groove is an annular groove coaxial with the first mounting hole, and a convex ring is provided on the side of the first plastic part facing the first surface, the convex ring is coaxial with the second mounting hole, and the convex ring is arranged in the first groove.

[0013] Optionally, an orthographic projection of the second sealing segment on the first plastic part is located within at least a portion of an orthographic projection of the convex ring on the first plastic part.

[0014] Optionally, a second groove is provided on the edge of the second mounting hole, and the second groove is an annular groove coaxial with the second mounting hole. The second groove is located on the side of the first plastic part away from the convex ring. A notch is provided on the edge of the second groove, and the notch extends along the circumference of the second groove and is a closed annular structure. The second groove is connected to the second mounting hole through the notch, and the second sealing section passes through the notch and is pressed between the base and the bottom of the second groove.

[0015] Optionally, the bottom of the second groove is flush with the first surface.

[0016] Optionally, an end surface of the second sealing segment facing away from the first sealing segment abuts against an inner wall of the second groove on a side away from the notch.

[0017] Optionally, the inner wall of the convex ring fits with the inner wall of the first groove on a side close to the first mounting hole; and / or the outer wall of the convex ring fits with the inner wall of the first groove on a side away from the first mounting hole.

[0018] Optionally, the inner wall of the protruding ring is flush with the hole wall of the second mounting hole.

[0019] Optionally, the sealing ring further includes a third sealing segment, which is connected to an end of the first sealing segment facing away from the second sealing segment, and the third sealing segment is sleeved on the column and clamped between the side wall of the column and the hole wall of the first mounting hole.

[0020] The second purpose of the utility model is to provide a single cell battery, which has higher safety performance and usage performance.

[0021] To achieve this purpose, the utility model adopts the following technical solutions:

[0022] The single battery comprises a battery shell, a battery core and the above-mentioned battery top cover, wherein the battery core is arranged in the battery shell, and the top cover sheet is arranged at the opening of the battery shell.

[0023] Beneficial effects of the utility model:

[0024] The top cover sheet includes a first surface and a first mounting hole, the first surface is configured to face the battery shell, the first plastic part is arranged on the first surface, and the first plastic part is provided with a second mounting hole with a hole diameter larger than the first mounting hole, the base of the pole is located on the side of the first plastic part away from the first surface, one end of the column of the pole is connected to the base, and the other end is penetrated through the second mounting hole and the first mounting hole, the sealing ring includes a first sealing section and a second sealing section connected to each other, the first sealing section is sleeved on the column, and the first sealing section is pressed between the base and the edge of the first mounting hole, the second sealing section is located on the side of the first sealing section away from the column, and the second sealing section is pressed between the base and the edge of the second mounting hole, thereby the first sealing section and the second sealing section block the conduction path of the electrolyte in the battery shell, so that the electrolyte in the battery shell cannot enter the gap between the pole and the top cover sheet, thereby reducing the probability of micro-short circuit problems in the single cell battery, and having the effect of improving the safety performance and use performance of the single cell battery.

[0025] The single cell provided by the utility model adopts the battery top cover, and the probability of micro short circuit between the pole and the top cover sheet is low, so the single cell has high safety performance and use performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a battery top cover provided in this embodiment;

[0027] Figure 2 is a partial enlarged structural schematic diagram of the first surface of the top cover sheet provided in this embodiment;

[0028] Figure 3 is a schematic diagram of a partially enlarged structure of the first plastic part facing the first surface provided in this embodiment;

[0029] Figure 4 is a schematic diagram of a partial enlarged structure of a first plastic part provided in this embodiment, on a side away from the first surface;

[0030] Figure 5 is a schematic cross-sectional structure diagram of a battery top cover provided in this embodiment;

[0031] Figure 6 yes Figure 5 A local enlarged view of point A;

[0032] Figure 7 is a partial enlarged structural schematic diagram of the second surface of the top cover sheet provided in this embodiment;

[0033] Figure 8 is a schematic structural diagram of the second plastic part provided in this embodiment, facing the second surface;

[0034] Fig. 9is a schematic structural diagram of the second plastic part provided in this embodiment, which is away from the second surface;

[0035] Fig.10 It is a schematic structural diagram of the riveting block provided in this embodiment facing the second plastic component.

[0036] In the figure:

[0037] 100, top cover plate; 110, first surface; 111, first groove; 120, first mounting hole; 130, second surface; 131, first anti-rotation protrusion; 200, first plastic part; 210, second mounting hole; 220, convex ring; 230, second groove; 300, pole; 310, base; 320, column; 400, sealing ring; 410, first sealing section; 420, second sealing section; 430, third sealing section; 500, second plastic part; 510, first anti-rotation groove; 520, second anti-rotation protrusion; 600, rivet block; 610, second anti-rotation groove. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] This embodiment provides a battery top cover, which can block the conductive path of the electrolyte in the battery shell, so that the electrolyte in the battery shell cannot enter the gap between the pole and the top cover sheet, thereby reducing the probability of micro short circuit problems in single cells.

[0043] Specifically, Figures 1 to 6 As shown, the battery top cover includes a top cover sheet 100, a first plastic part 200, a pole 300 and a sealing ring 400, wherein the top cover sheet 100 includes a first surface 110 and a first mounting hole 120, the first surface 110 is configured to face the battery shell (not shown in the figure), the first plastic part 200 is arranged on the first surface 110, the first plastic part 200 is provided with a second mounting hole 210, the second mounting hole 210 is coaxial with the first mounting hole 120, and the aperture of the second mounting hole 210 is larger than the aperture of the first mounting hole 120, the pole 300 includes a base 310 and a column 320, the base 310 is located at On the side of the first plastic part 200 away from the first surface 110, one end of the column 320 is connected to the base 310, and the other end is inserted into the second mounting hole 210 and the first mounting hole 120. The sealing ring 400 includes a first sealing section 410 and a second sealing section 420. The first sealing section 410 is sleeved on the column 320, and the first sealing section 410 is pressed between the base 310 and the edge of the first mounting hole 120. The second sealing section 420 is connected to the side of the first sealing section 410 away from the column 320, and the second sealing section 420 is pressed between the base 310 and the edge of the second mounting hole 210.

[0044] Based on the above design, the top cover sheet 100 includes a first surface 110 and a first mounting hole 120, the first surface 110 is configured to face the battery shell, the first plastic part 200 is arranged on the first surface 110, and the first plastic part 200 is provided with a second mounting hole 210 with a hole diameter larger than the first mounting hole 120, the base 310 of the pole 300 is located on the side of the first plastic part 200 away from the first surface 110, one end of the column 320 of the pole 300 is connected to the base 310, and the other end is penetrated through the second mounting hole 210 and the first mounting hole 120, the sealing ring 400 includes a first sealing section 410 and a second sealing section 420 connected to each other, the first sealing section 410 is sleeved on the column 320, and the first sealing section 410 is sleeved on the column 320, and the first sealing section 410 is sleeved on the column 320. 0 is pressed between the base 310 and the edge of the first mounting hole 120, the second sealing section 420 is located on the side of the first sealing section 410 away from the column 320, and the second sealing section 420 is pressed between the base 310 and the edge of the second mounting hole 210, thereby the first sealing section 410 and the second sealing section 420 block the conductive path of the electrolyte in the battery shell, so that the electrolyte in the battery shell cannot enter the gap between the pole 300 and the top cover sheet 100 (the gap between the base 310 and the first surface 110, the gap between the column 320 and the hole wall of the first mounting hole 120), thereby reducing the probability of micro-short circuit problems in the single cell, which has the effect of improving the safety performance and performance of the single cell.

[0045] Alternatively, if Figures 1 to 6 As shown, a first groove 111 is provided on the first surface 110, and the first groove 111 is an annular groove coaxial with the first mounting hole 120. A convex ring 220 is provided on the side of the first plastic part 200 facing the first surface 110, and the convex ring 220 is coaxial with the second mounting hole 210. The convex ring 220 is arranged in the first groove 111. When assembling the first plastic part 200 and the top cover sheet 100, the design of the first groove 111 and the convex ring 220 can conveniently position the first plastic part 200.

[0046] Alternatively, if Figures 1 to 6 As shown, the inner wall of the convex ring 220 fits with the inner wall of the first groove 111 on the side close to the first mounting hole 120, further improving the positioning effect of the first plastic part 200 when assembling it. In another embodiment, the outer wall of the convex ring 220 fits with the inner wall of the first groove 111 on the side away from the first mounting hole 120, which can also improve the positioning effect of the first plastic part 200. In yet another embodiment, the inner wall of the convex ring 220 fits with the inner wall of the first groove 111 on the side close to the first mounting hole 120, and the outer wall of the convex ring 220 fits with the inner wall of the first groove 111 on the side away from the first mounting hole 120, that is, the width of the convex ring 220 is equal to the groove width of the first groove 111, and this structure can also improve the positioning effect of the first plastic part 200.

[0047] Furthermore, if Figures 1 to 6 As shown, a second groove 230 is provided at the edge of the second mounting hole 210. The second groove 230 is an annular groove coaxial with the second mounting hole 210. The second groove 230 is located on the side of the first plastic part 200 away from the convex ring 220. A notch is provided at the edge of the second groove 230. The notch extends along the circumference of the second groove 230 and is a closed annular structure. The second groove 230 is connected to the second mounting hole 210 through the notch. The second sealing section 420 passes through the notch and is pressed between the base 310 and the bottom of the second groove 230. This structural design can reduce the total thickness of the battery top cover at the second sealing section 420, which has the effect of improving the energy density of the single battery.

[0048] Furthermore, if Figures 1 to 6 As shown, the bottom of the second groove 230 is flush with the first surface 110, so that the second sealing section 420 pressed between the bottom of the second groove 230 and the base 310 and the first sealing section 410 pressed between the edge of the first mounting hole 120 and the base 310 are on the same plane, thereby improving the isolation effect of the electrolyte conduction path, especially improving the sealing of the connection position between the second sealing section 420 and the first sealing section 410. On the other hand, the structural design that the bottom of the second groove 230 is flush with the first surface 110 can further reduce the total thickness of the battery top cover, which is conducive to improving the energy density of the single battery.

[0049] Furthermore, if Figures 1 to 6 As shown, the end face of the second sealing segment 420 facing away from the first sealing segment 410 abuts against the inner wall of the second groove 230 away from the notch to achieve sealing between the second sealing segment 420 and the inner wall of the second groove 230, preventing the electrolyte in the battery shell from entering the gap between the second sealing segment 420 and the inner wall of the second groove 230, further improving the isolation effect of the electrolyte conduction path.

[0050] Alternatively, if Figures 1 to 6 As shown, the sealing ring 400 also includes a third sealing segment 430, which is connected to the end of the first sealing segment 410 that is away from the second sealing segment 420. The third sealing segment 430 is sleeved on the column 320, and the third sealing segment 430 is clamped between the side wall of the column 320 and the hole wall of the first mounting hole 120, thereby achieving sealing between the column 320 and the hole wall of the first mounting hole 120 and preventing the electrolyte from entering the gap between the column 320 and the hole wall of the first mounting hole 120.

[0051] Alternatively, if Figures 1 to 6 As shown, the inner wall of the protruding ring 220 is flush with the hole wall of the second mounting hole 210, so as to simplify the structure of the first plastic part 200, reduce the production difficulty and reduce the production cost.

[0052] Alternatively, if Figures 1 to 6 As shown, the orthographic projection of the second sealing segment 420 on the first plastic part 200 is located within at least a portion of the orthographic projection of the convex ring 220 on the first plastic part 200, so as to reduce the total thickness of the battery top cover in the second sealing segment 420 area, which is beneficial to improve the energy density of the single battery.

[0053] Alternatively, if Figures 1 to 10 As shown, the battery top cover also includes a second plastic part 500 and a rivet block 600, the top cover sheet 100 also includes a second surface 130, the second surface 130 is arranged opposite to the first surface 110, that is, the second surface 130 is configured to face away from the battery shell, the second plastic part 500 is arranged on the second surface 130, the rivet block 600 is arranged on the side of the second plastic part 500 facing away from the second surface 130, the column 320 is sequentially penetrated by the second mounting hole 210, the first mounting hole 120, the second plastic part 500 and the rivet block 600, and the end of the column 320 facing away from the base 310 is fixedly connected to the rivet block 600.

[0054] Furthermore, if Figures 1 to 10 As shown, two first anti-rotation protrusions 131 are protrudingly provided on the second surface 130, and the two first anti-rotation protrusions 131 are symmetrically arranged about the axis of the first mounting hole 120. Two first anti-rotation grooves 510 are provided on the side of the second plastic part 500 facing the second surface 130. The two first anti-rotation grooves 510 correspond one-to-one to the two first anti-rotation protrusions 131, and each first anti-rotation protrusion 131 is embedded in a corresponding first anti-rotation groove 510 to achieve the anti-rotation effect of the second plastic part 500.

[0055] Furthermore, if Figures 1 to 10 As shown, two second anti-rotation protrusions 520 are protrudingly provided on the side of the second plastic part 500 facing away from the second surface 130, and the two second anti-rotation protrusions 520 are symmetrically arranged about the axis of the column 320. Two second anti-rotation grooves 610 are provided on the side of the rivet block 600 facing the second plastic part 500, and the two second anti-rotation grooves 610 correspond one-to-one to the two second anti-rotation protrusions 520, and each second anti-rotation protrusion 520 is embedded in a corresponding second anti-rotation groove 610 to achieve the anti-rotation effect of the rivet block 600.

[0056] The top cover sheet 100 in this embodiment is made of a plain aluminum plate. Of course, in other implementation schemes, the top cover sheet 100 may also be made of other materials that are common in the art, which will not be described in detail here.

[0057] In this embodiment, the number of the poles 300, the riveting block 600, the second plastic part 500, the sealing ring 400 and the first mounting hole 120 are two and correspond one to one. One of the two poles 300 is a positive pole and the other is a negative pole.

[0058] This embodiment also provides a single cell battery, which has high safety performance and usability. Specifically, the single cell battery includes a battery shell, a battery cell and the above-mentioned battery top cover, the battery cell is arranged in the battery shell, and the top cover sheet 100 is arranged at the opening of the battery shell. The single cell battery adopts the above-mentioned battery top cover, and the probability of micro short circuit between the pole 300 and the top cover sheet 100 is low, so the single cell battery has high safety performance and usability.

[0059] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery cover, characterized in that: include: A top cover sheet (100), the top cover sheet (100) comprising a first surface (110) and a first mounting hole (120), the first surface (110) being configured to face the battery housing; A first plastic part (200), the first plastic part (200) being arranged on the first surface (110), the first plastic part (200) being provided with a second mounting hole (210), the aperture of the second mounting hole (210) being larger than the aperture of the first mounting hole (120); A pole (300), the pole (300) comprising a base (310) and a column (320), the base (310) being located on a side of the first plastic part (200) away from the first surface (110), one end of the column (320) being connected to the base (310), and the other end of the column (320) being passed through the second mounting hole (210) and the first mounting hole (120); A sealing ring (400), the sealing ring (400) comprising a first sealing section (410) and a second sealing section (420), the first sealing section (410) being sleeved on the column (320), and the first sealing section (410) being pressed between the base (310) and the edge of the first mounting hole (120), the second sealing section (420) being connected to a side of the first sealing section (410) facing away from the column (320), and the second sealing section (420) being pressed between the base (310) and the edge of the second mounting hole (210).

2. The battery top cover according to claim 1, characterized in that: A first groove (111) is provided on the first surface (110), and the first groove (111) is an annular groove coaxial with the first mounting hole (120). A convex ring (220) is provided on the side of the first plastic part (200) facing the first surface (110), and the convex ring (220) is coaxial with the second mounting hole (210), and the convex ring (220) is arranged in the first groove (111).

3. The battery top cover according to claim 2, characterized in that: The orthographic projection of the second sealing section (420) on the first plastic part (200) is located within at least a portion of the orthographic projection of the convex ring (220) on the first plastic part (200).

4. The battery top cover according to claim 2, characterized in that: A second groove (230) is provided at the edge of the second mounting hole (210), the second groove (230) being an annular groove coaxial with the second mounting hole (210), the second groove (230) being located on a side of the first plastic part (200) away from the convex ring (220), a notch is provided at the edge of the second groove (230), the notch extending along the circumference of the second groove (230) and being a closed annular structure, the second groove (230) being connected to the second mounting hole (210) through the notch, the second sealing section (420) passing through the notch and being pressed between the base (310) and the groove bottom of the second groove (230).

5. The battery top cover according to claim 4, characterized in that: The bottom of the second groove (230) is flush with the first surface (110).

6. The battery top cover according to claim 4, characterized in that: An end surface of the second sealing section (420) facing away from the first sealing section (410) abuts against an inner wall of the second groove (230) on a side away from the notch.

7. The battery top cover according to any one of claims 2 to 6, characterized in that: The inner wall of the convex ring (220) fits with the inner wall of the first groove (111) on a side close to the first mounting hole (120); and / or the outer wall of the convex ring (220) fits with the inner wall of the first groove (111) on a side away from the first mounting hole (120).

8. The battery top cover according to any one of claims 2 to 6, characterized in that: The inner wall of the convex ring (220) is flush with the hole wall of the second mounting hole (210).

9. The battery top cover according to any one of claims 1 to 6, characterized in that: The sealing ring (400) further comprises a third sealing section (430), wherein the third sealing section (430) is connected to an end of the first sealing section (410) which is away from the second sealing section (420), and the third sealing section (430) is sleeved on the column (320) and clamped between the side wall of the column (320) and the hole wall of the first mounting hole (120).

10. A single cell, characterized in that: The invention comprises a battery shell, a battery cell and a battery top cover as claimed in any one of claims 1 to 9, wherein the battery cell is arranged in the battery shell, and the top cover sheet (100) is arranged to cover the opening of the battery shell.

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