Battery cover plate and battery structure

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate and a battery structure. The battery cover plate comprises a top cover sheet, a first sealing ring, a second sealing ring and a pole assembly, the top cover piece is provided with a pole hole and a first limiting groove, and the first limiting groove is formed in the upper surface of the top cover piece. The first sealing ring is limited in the first limiting groove, and the outer wall of the first sealing ring abuts against the inner wall of the first limiting groove. The second sealing ring abuts against the lower surface of the top cover piece. The pole assembly penetrates through the pole hole, the first sealing ring and the second sealing ring, the inner wall of the first sealing ring and the inner wall of the second sealing ring abut against the pole assembly, and the pole assembly and the inner wall of the pole hole are arranged in a spaced mode. By extruding the first sealing ring and the second sealing ring, a double-layer sealing structure is formed above and below the top cover plate, so that good sealing performance is achieved between the pole assembly and the top cover plate, foreign matters are prevented from entering a gap between the pole assembly and the top cover plate, and short circuit of the battery cover plate is effectively avoided.

Description

Technical Field

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

[0002] With the development of modern society and the increasing awareness of environmental protection, more and more devices are choosing batteries as power sources, such as mobile phones, laptops, power tools, and electric vehicles. This provides a broad space for the application and development of batteries, but at the same time, the requirements for battery performance and safety are also increasing. The battery cover is a key component of the battery, which is directly related to its reliability, service life, and capacity, affecting the production and use safety of manufacturers and consumers.

[0003] In existing battery covers, a sealing ring is used to seal between the terminal and the cover. The structure of the sealing ring not only affects the overall discharge capacity of the battery but also plays a decisive role in the battery's leak-proof and explosion-proof safety performance. Typically, a T-shaped sealing ring is used for sealing. However, during assembly of the battery cover, the T-shaped sealing ring may turn outward, affecting the sealing effect and allowing foreign objects to enter between the top cover and the terminal, causing a short circuit.

[0004] Therefore, there is an urgent need for a battery cover and a battery structure to solve the above problems. Utility Model Content

[0005] One purpose of the present invention is to provide a battery cover that can simplify the sealing structure, improve the sealing effect, and reduce the risk of short circuit of the battery cover.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A battery cover is provided, comprising:

[0008] A top cover plate, wherein the top cover plate is provided with a pole hole and a first limiting groove, and the first limiting groove is provided on the upper surface of the top cover plate;

[0009] a first sealing ring, the first sealing ring being limited in the first limiting groove, with an outer wall of the first sealing ring abutting against an inner wall of the first limiting groove;

[0010] a second sealing ring, the second sealing ring abutting against the lower surface of the top cover sheet;

[0011] A pole assembly is provided through the pole hole, the first sealing ring and the second sealing ring. The inner wall of the first sealing ring and the inner wall of the second sealing ring abut against the pole assembly. The pole assembly is spaced apart from the inner wall of the pole hole.

[0012] As an optional solution for the battery cover, the cross-sectional shape of the first sealing ring is rectangular; and / or the cross-sectional shape of the second sealing ring is rectangular.

[0013] As an optional solution for the battery cover, the pole assembly includes an upper pole, which is located above the top cover plate and the first sealing ring, and the lower surface of the upper pole abuts against the upper surface of the first sealing ring.

[0014] As an optional solution for the battery cover, the pole assembly further includes a lower pole, which is located below the second sealing ring, and the upper surface of the lower pole abuts against the lower surface of the second sealing ring.

[0015] As an optional solution for the battery cover, the pole assembly further includes a penetration portion, which penetrates the pole hole, the first sealing ring and the second sealing ring, and is connected between the upper pole and the lower pole.

[0016] As an optional solution for the battery cover, the battery cover further includes an upper insulating member, which is sleeved on the first sealing ring. In the height direction, the upper insulating member is located between the pole assembly and the top cover.

[0017] As an optional solution for the battery cover, the top cover plate is further provided with a second limiting groove, the second limiting groove is located on the upper surface of the top cover plate, and the upper insulating member is limited in the second limiting groove.

[0018] As an optional solution for the battery cover, the battery cover further includes a lower insulating member, which is arranged around the second sealing ring. In the height direction, the lower insulating member is located between the pole assembly and the top cover sheet.

[0019] As an optional solution for the battery cover, the top cover plate is further provided with a third limiting groove, the third limiting groove is located on the lower surface of the top cover plate, and the lower insulating member is limited in the third limiting groove.

[0020] Another object of the present invention is to provide a battery structure with good sealing performance to ensure the working performance and safety of the battery structure.

[0021] To achieve this purpose, the present invention adopts the following technical solutions:

[0022] Provided is a battery structure, comprising a battery cell, a shell and the above-mentioned battery cover, wherein the battery cell is arranged in the shell, and the battery cover is tightly connected to an opening of the shell.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a battery cover, wherein a first sealing ring is limited in a first limiting groove and is sleeved on the pole assembly, the inner wall of the first sealing ring abuts the pole assembly, and the outer wall abuts the inner wall of the first limiting groove. The first sealing ring is supported by the pole assembly and the top cover plate to achieve relative fixation, so that a certain distance is maintained between the outer wall of the pole assembly and the inner wall of the first pole hole, thereby achieving isolation and insulation between the pole assembly and the top cover plate. The second sealing ring abuts the lower surface of the top cover plate and is sleeved on the pole assembly. When assembling the battery cover, by squeezing the first sealing ring and the second sealing ring, a double-layer sealing structure is formed above and below the top cover plate, so that there is good sealing between the pole assembly and the top cover plate, preventing foreign matter from entering the gap between the pole assembly and the top cover plate, and effectively avoiding short circuit of the battery cover plate. In addition, the first sealing ring and the second sealing ring are simple in structure and can be applied to top cover plates of different thicknesses, which is conducive to controlling the thickness of the battery cover plate during the production process and achieving flexible adjustment of the size of the battery cover plate.

[0025] The utility model also provides a battery structure, which has good sealing performance, prevents the battery cover from short-circuiting, ensures the working performance of the battery structure, and improves the safety of the battery structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an exploded schematic diagram of the battery cover provided by the present invention;

[0027] Figure 2 It is a partial cross-sectional view of the battery cover provided by the utility model.

[0028] In the picture:

[0029] 1. Top cover; 11. Pole hole; 12. First limiting groove; 13. Second limiting groove; 14. Third limiting groove;

[0030] 2. The first sealing ring;

[0031] 3. Second sealing ring;

[0032] 4. Pole assembly; 41. Upper pole; 42. Lower pole; 43. Insertion portion;

[0033] 5. Upper insulation;

[0034] 6. Lower insulation;

[0035] 7. Liquid injection structure; 71. Liquid injection hole; 72. End cover;

[0036] 8. Explosion-proof structure; 81. Explosion-proof hole; 82. Explosion-proof valve; 83. Explosion-proof disk. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0038] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0041] like Figures 1 to 2As shown, the battery cover of this embodiment includes a top cover sheet 1, a first sealing ring 2, a second sealing ring 3 and a pole assembly 4. The top cover sheet 1 is provided with a pole hole 11 and a first limiting groove 12. The first limiting groove 12 is provided on the upper surface of the top cover sheet 1 in the height direction, and the height direction is the X direction in the figure. The first sealing ring 2 is limited in the first limiting groove 12, and the outer wall of the first sealing ring 2 abuts against the inner wall of the first limiting groove 12. The second sealing ring 3 abuts against the lower surface of the top cover sheet 1. The pole assembly 4 is passed through the pole hole 11, the first sealing ring 2 and the second sealing ring 3. The inner wall of the first sealing ring 2 and the inner wall of the second sealing ring 3 both abut against the pole assembly 4. The pole assembly 4 is spaced apart from the inner wall of the pole hole 11.

[0042] Based on the above design, the inner wall of the first sealing ring 2 abuts against the pole assembly 4, and the outer wall abuts against the inner wall of the first limiting groove 12. The support of the first sealing ring 2 achieves relative fixation between the pole assembly 4 and the top cover sheet 1, so that a certain distance is maintained between the outer wall of the pole assembly 4 and the inner wall of the first pole hole 11, thereby achieving isolation and insulation between the pole assembly 4 and the top cover sheet 1. The second sealing ring 3 abuts against the lower surface of the top cover sheet 1 and is sleeved on the pole assembly 4. When assembling the battery cover, metal debris is generated due to the assembly of the pole assembly 4. The metal debris easily enters the pole hole 11 and causes a short circuit between the top cover sheet 1 and the pole assembly 4. Therefore, by squeezing the first sealing ring 2 and the second sealing ring 3, a double-layer sealing structure is formed above and below the top cover sheet 1, so that the pole assembly 4 and the top cover sheet 1 have good sealing performance, preventing foreign matter such as metal debris from entering the gap between the pole assembly 4 and the top cover sheet 1, and effectively avoiding a short circuit in the battery cover. In addition, the first sealing ring 2 and the second sealing ring 3 have a simple structure and can be applied to top cover sheets 1 of different thicknesses, which is beneficial for controlling the thickness of the battery cover during the production process and realizing flexible adjustment of the size of the battery cover.

[0043] In existing battery covers, T-shaped sealing rings are commonly used. However, T-shaped sealing rings are prone to the risk of turning inside out during assembly and extrusion, resulting in a gap between the sealing ring and the terminal, affecting the sealing of the battery cover. Preferably, in this embodiment, the cross-sectional shape of the first sealing ring 2 is rectangular, or the cross-sectional shape of the second sealing ring 3 is rectangular, or the cross-sectional shapes of the first sealing ring 2 and the second sealing ring 3 are both rectangular, to avoid the phenomenon of turning inside out, simplify the structure of the first sealing ring 2 or the second sealing ring 3, and reduce production costs.

[0044] When the cross-section of the first sealing ring 2 or the second sealing ring 3 is rectangular, the contact area between the first sealing ring 2 or the second sealing ring and the terminal assembly 4 can be expanded, which helps to improve the sealing effect between the first sealing ring 2 or the second sealing ring 3 and the terminal assembly 4 when the first sealing ring 2 or the second sealing ring 3 is squeezed. In addition, when the cross-section of the first sealing ring 2 is rectangular, the contact area between the first sealing ring 2 and the bottom wall and inner wall of the first limiting groove 12 can also be increased, thereby enhancing the limiting effect of the first limiting groove 12 on the first sealing ring 2 and improving the structural stability of the battery cover. Of course, in some other embodiments, the cross-sectional shape of the first sealing ring 2 or the second sealing ring 3 can also be set to a circular, elliptical, etc.

[0045] Furthermore, the pole assembly 4 includes an upper pole 41, a lower pole 42 and a penetration portion 43. The upper pole 41 is located above the top cover sheet 1 and the first sealing ring 2, and the lower surface of the upper pole 41 abuts against the upper surface of the first sealing ring 2. The lower pole 42 is located below the second sealing ring 3, and the upper surface of the lower pole 42 abuts against the lower surface of the second sealing ring 3. The penetration portion 43 penetrates the pole hole 11, the first sealing ring 2 and the second sealing ring 3, and the penetration portion 43 is connected between the upper pole 41 and the lower pole 42. In this embodiment, the penetration portion 43 is penetrated and connected to the upper pole 41. Optionally, the penetration portion 43 and the upper pole 41 can be connected by welding, riveting, etc.

[0046] It can be understood that when assembling the pole assembly 4, the first sealing ring 2 can be squeezed between the upper pole 41 and the top cover sheet 1 to achieve sealing between the upper pole 41 and the top cover sheet 1 and between the penetration portion 43 and the top cover sheet 1; the second sealing ring 3 is squeezed between the lower pole 42 and the top cover sheet 1 to achieve sealing between the lower pole 42 and the top cover sheet 1 and between the penetration portion 43 and the top cover sheet 1.

[0047] Furthermore, the battery cover also includes an upper insulating member 5, which is sleeved on the first sealing ring 2 and is located vertically between the pole assembly 4 and the top cover 1. In this embodiment, the upper insulating member 5 covers the bottom surface and surrounding area of the upper pole 41, thereby achieving insulation between the upper pole 41 and the top cover 1.

[0048] Optionally, the top cover plate 1 is further provided with a second limiting groove 13, which is located on the upper surface of the top cover plate 1. The upper insulating member 5 can be limited in the second limiting groove 13, which is convenient for positioning the upper insulating member 5 and improving the structural stability of the battery cover. At the same time, it can reduce the height of the battery cover and ensure the size requirements of the battery structure.

[0049] Furthermore, the battery cover plate also includes a lower insulating member 6, which is disposed around the second sealing ring 3 and is located vertically between the terminal assembly 4 and the top cover plate 1. In this embodiment, the lower insulating member 6 covers the upper surface and surrounding area of the lower terminal 42 to ensure effective insulation between the lower terminal 42 and the top cover plate 1.

[0050] Optionally, the top cover piece 1 is also provided with a third limiting groove 14, which is located on the lower surface of the top cover piece 1, and the lower insulating part 6 is limited in the third limiting groove 14 to achieve positioning between the lower insulating part 6 and the top cover piece 1, thereby ensuring relative stability between the lower insulating part 6 and the top cover piece 1.

[0051] Furthermore, the battery cover plate also includes an injection structure 7, which includes an injection hole 71 and an end cover 72. The injection hole 71 is arranged on the top cover sheet 1 in the height direction and is used to inject electrolyte into the battery structure. The end cover 72 is detachably connected to the top cover sheet 1 and covers the injection hole 71. When the battery structure does not need to be injected, the end cover 72 can prevent other foreign matter from entering the battery structure through the injection hole 71, maintain the cleanliness of the electrolyte, ensure the performance of the battery, and improve the safety and service life of the battery structure.

[0052] Furthermore, the battery cover also includes an explosion-proof structure 8, which includes an explosion-proof hole 81, an explosion-proof valve 82 and an explosion-proof plate 83. The explosion-proof hole 81 is set through the top cover plate 1, and the explosion-proof valve 82 is connected to the side of the top cover plate 1 facing the interior of the battery structure and covers the explosion-proof hole 81. The explosion-proof valve 82 is provided with a notch. When the air pressure inside the battery structure is too high, the notch of the explosion-proof valve 82 is small in thickness and can rupture under the action of high-pressure gas, thereby releasing high-pressure gas, achieving exhaust of the battery structure, and ensuring the safety of the battery structure. The explosion-proof plate 83 is connected to the side of the top cover plate 1 facing away from the interior of the battery and covers the explosion-proof hole 81 to prevent foreign objects from bumping and scratching the explosion-proof valve 82 during assembly or use of the battery cover, thereby ensuring that the explosion-proof valve 82 functions well.

[0053] This embodiment also provides a battery structure comprising a battery cell, a housing, and the aforementioned battery cover. The battery cell is disposed within the housing and electrically connected to the terminal assembly 4, enabling electrical transmission within and outside the battery structure. The battery cover is hermetically connected to the opening of the housing. This battery structure exhibits excellent sealing properties, preventing short circuits in the battery cover, ensuring operational performance, and improving the safety and service life of the battery structure.

[0054] 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. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A battery cover, characterized in that: include: A top cover sheet (1), the top cover sheet (1) being provided with a pole hole (11) and a first limiting groove (12), the first limiting groove (12) being provided on the upper surface of the top cover sheet (1); A first sealing ring (2), the first sealing ring (2) is limited in the first limiting groove (12), and the outer wall of the first sealing ring (2) abuts against the inner wall of the first limiting groove (12); A second sealing ring (3), the second sealing ring (3) abutting against the lower surface of the top cover sheet (1); A pole assembly (4), the pole assembly (4) is inserted into the pole hole (11), the first sealing ring (2) and the second sealing ring (3), the inner wall of the first sealing ring (2) and the inner wall of the second sealing ring (3) abut against the pole assembly (4), and the pole assembly (4) is spaced apart from the inner wall of the pole hole (11).

2. The battery cover according to claim 1, characterized in that: The cross-sectional shape of the first sealing ring (2) is rectangular; And / or, the cross-sectional shape of the second sealing ring (3) is rectangular.

3. The battery cover according to claim 1, characterized in that: The pole assembly (4) comprises an upper pole (41), the upper pole (41) being located above the top cover sheet (1) and the first sealing ring (2), and the lower surface of the upper pole (41) being in contact with the upper surface of the first sealing ring (2).

4. The battery cover according to claim 3, characterized in that: The pole assembly (4) further comprises a lower pole (42), the lower pole (42) being located below the second sealing ring (3), and the upper surface of the lower pole (42) being in contact with the lower surface of the second sealing ring (3).

5. The battery cover according to claim 4, characterized in that: The pole assembly (4) further includes a penetration portion (43), the penetration portion (43) being penetrated through the pole hole (11), the first sealing ring (2) and the second sealing ring (3), and the penetration portion (43) being connected between the upper pole (41) and the lower pole (42).

6. The battery cover according to claim 1, characterized in that: The battery cover plate further comprises an upper insulating member (5), which is sleeved on the first sealing ring (2). In the height direction, the upper insulating member (5) is located between the pole assembly (4) and the top cover plate (1).

7. The battery cover according to claim 6, characterized in that: The top cover sheet (1) is further provided with a second limiting groove (13), the second limiting groove (13) being located on the upper surface of the top cover sheet (1), and the upper insulating member (5) being limited in the second limiting groove (13).

8. The battery cover according to claim 1, characterized in that: The battery cover plate further comprises a lower insulating member (6), which is arranged around the second sealing ring (3). In the height direction, the lower insulating member (6) is located between the pole assembly (4) and the top cover plate (1).

9. The battery cover according to claim 8, characterized in that: The top cover sheet (1) is further provided with a third limiting groove, the third limiting groove being located on the lower surface of the top cover sheet (1), and the lower insulating member (6) being limited in the third limiting groove.

10. A battery structure, characterized in that: The invention comprises a battery cell, a shell and the battery cover plate according to any one of claims 1 to 9, wherein the battery cell is arranged in the shell, and the battery cover plate is tightly connected to the opening of the shell.

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