Battery cover plate assembly and cylindrical battery

Abstract

A battery cover plate assembly and a cylindrical battery. The battery cover plate assembly comprises a cover plate body (11), an insulating support assembly (12), and a pole (13). The insulating support assembly (12) comprises an insulating ceramic member (121) and a support member (122) which are integrally formed; the insulating ceramic member (121) is disposed between the cover plate body (11) and the upper surface of a bottom plate (131) of the pole (13); and the support member (122) is disposed between the insulating ceramic member (121) and the upper surface of the bottom plate (131).

Description

Battery cover assembly and cylindrical battery

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 17, 2024, with application number 202420112788.4, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, for example, to a battery cover assembly and a cylindrical battery. Background Art

[0003] A lower plastic seal is typically placed between the battery cover and the terminal. Made of plastic, this seal acts as an insulator, preventing short circuits between the terminal and cover assembly. However, due to its poor heat resistance, the lower plastic seal is susceptible to softening and creeping at high temperatures. This reduces the compression of the sealing ring, resulting in a loss of airtightness and a poor seal, posing a potential safety hazard to the battery.

[0004] Summary of the Invention

[0005] The present application provides a battery cover assembly and a cylindrical battery. The use of insulating ceramic parts can reduce the risk of softening creep caused by high temperature, thereby reducing the impact on the compression of the sealing ring, improving the sealing effect of the sealing ring, and improving the safety of the battery.

[0006] A battery cover assembly, comprising:

[0007] A cover body, wherein the cover body is provided with a first mounting hole extending along a first direction;

[0008] an insulating support assembly, wherein the insulating support assembly is provided with a second mounting hole extending along the first direction;

[0009] a pole, the pole being passed through the cover body and the insulating support assembly via the first mounting hole and the second mounting hole;

[0010] The insulating support assembly includes an insulating ceramic member and a support member formed integrally; the insulating ceramic member is arranged between the cover body and the upper surface of the bottom plate of the pole; the support member is arranged between the insulating ceramic member and the upper surface of the bottom plate;

[0011] The axes of the cover plate body, the pole and the insulating support assembly are arranged to coincide with each other.

[0012] In one embodiment, the cover body is provided with a first groove, and the insulating ceramic member is provided on the first groove;

[0013] Wherein, taking a plane perpendicular to the first direction as a reference plane, the inner contour of the orthographic projection of the first groove on the reference plane coincides with the orthographic projection of the inner circumference of the cover body corresponding to the first mounting hole on the reference plane.

[0014] In one embodiment, the inner diameter of the insulating ceramic member is smaller than the inner diameter of the first groove.

[0015] In one embodiment, the insulating ceramic member is provided with a second groove, and the supporting member is provided on the second groove;

[0016] Wherein, taking a plane perpendicular to the first direction as a reference plane, the inner contour of the orthographic projection of the second groove on the reference plane coincides with the orthographic projection of the inner circumference of the insulating ceramic component corresponding to the second mounting hole on the reference plane.

[0017] In one embodiment, the inner diameter of the support member is equal to the inner diameter of the second groove; the outer diameter of the support member is equal to the outer diameter of the second groove; the thickness of the support member along the first direction is equal to the groove depth of the second groove along the first direction.

[0018] In one embodiment, the battery cover assembly further includes a sealing ring, which is sleeved on the column of the pole and located between the top plate of the pole and the cover body; the upper surface of the sealing ring abuts against the lower surface of the top plate.

[0019] In one embodiment, the battery cover assembly further includes an upper plastic, and the upper plastic is provided on the cover body.

[0020] In one embodiment, the support member is a steel sheet.

[0021] In one embodiment, the insulating ceramic member and the supporting member are both ring-shaped.

[0022] A cylindrical battery comprises a battery shell and a battery cover assembly, wherein the battery cover assembly is arranged on the battery shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is an exploded schematic diagram of a battery cover assembly provided in an embodiment of the present application;

[0024] FIG2 is an exploded schematic diagram of another battery cover assembly provided in an embodiment of the present application;

[0025] FIG3 is a schematic structural diagram of a battery cover assembly provided in an embodiment of the present application;

[0026] FIG4 is a schematic structural diagram of an insulating support assembly provided in an embodiment of the present application.

[0027] Description of Figure Numbers:

[0028] 10. Battery cover assembly; 11. Cover body; 111. First mounting hole; 112. First groove; 113. Third groove; 12. Insulating support assembly; 121. Insulating ceramic member; 1211. Second groove; 122. Support member; 123. Second mounting hole; 13. Pole; 131. Bottom plate; 132. Top plate; 133. Column; 14. Sealing ring; 15. Upper plastic; 151. First plastic part; 152. Second plastic part; X, first direction. DETAILED DESCRIPTION

[0029] In the description of this application, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are used solely to facilitate the description of this application and simplify the description. 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 this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0030] In the description of this application, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. A person of ordinary skill in the art will understand the meaning of these terms in this application based on the circumstances.

[0031] Referring to Figures 1 to 4, the present application provides a battery cover assembly 10, which includes a cover body 11, an insulating support assembly 12 and a pole 13. The cover body 11 is provided with a first mounting hole 111 along the first direction X; the insulating support assembly 12 is provided with a second mounting hole 123 along the first direction X; the pole 13 is passed through the cover body 11 and the insulating support assembly 12 by means of the first mounting hole 111 and the second mounting hole 123. The insulating support assembly 12 includes an insulating ceramic part 121 and a support part 122 that are integrally formed; the insulating ceramic part 121 is provided between the cover body 11 and the upper surface of the bottom plate 131 of the pole 13; the support part 122 is provided between the insulating ceramic part 121 and the upper surface of the bottom plate 131. Among them, the axes of the cover body 11, the pole 13 and the insulating support assembly 12 are arranged to coincide.

[0032] The second mounting hole 123 is formed through the insulating ceramic member 121 and the supporting member 122 .

[0033] Thus, in the present application, an insulating support assembly 12 is provided, and the insulating support assembly 12 includes an insulating ceramic part 121 and a support part 122. By replacing the lower plastic in the related technology with the insulating ceramic part 121, the insulating ceramic part 121 can play an insulating role, and the heat resistance and high temperature resistance of the insulating ceramic part 121 are better than those of plastic materials. The use of the insulating ceramic part 121 can reduce the risk of softening creep caused by high temperature, thereby reducing the impact on the compression of the sealing ring 14, improving the sealing effect of the sealing ring 14, and improving the safety of the battery; compared with setting two separate components, by setting the insulating ceramic part 121 and the support part 122 as an integrally formed structure, parts can be saved, assembly efficiency can be improved, and the production efficiency of the battery cover assembly 10 can be effectively improved, saving manufacturing costs.

[0034] Referring to Figures 1 and 3 , in some embodiments, the cover body 11 defines a first groove 112, and the insulating ceramic member 121 is disposed within the first groove 112. Taking a plane perpendicular to the first direction X as a reference plane, the inner contour of the orthographic projection of the first groove 112 onto the reference plane coincides with the orthographic projection of the inner circumference of the corresponding first mounting hole 111 of the cover body 11 onto the reference plane. In this embodiment, the inner diameter of the first groove 112 is equal to the diameter of the first mounting hole 111, and the inner circumference of the first groove 112 is aligned with the first mounting hole 111.

[0035] In some embodiments, the inner diameter of the insulating ceramic member 121 is smaller than the inner diameter of the first groove 112 .

[0036] Referring to Figures 1 and 3, in some embodiments, the insulating ceramic member 121 is provided with a second groove 1211, and the support member 122 is disposed on the second groove 1211. Taking a plane perpendicular to the first direction X as a reference plane, the inner contour of the orthographic projection of the second groove 1211 on the reference plane coincides with the orthographic projection of the inner circumference of the corresponding second mounting hole 123 of the insulating ceramic member 121 on the reference plane. In this embodiment, the inner diameter of the second groove 1211 is equal to the aperture of the second mounting hole 123, and the inner circumference of the second groove 1211 is aligned with the second mounting hole 123.

[0037] In some embodiments, the inner diameter of the support member 122 is equal to the inner diameter of the second groove 1211; the outer diameter of the support member 122 is equal to the outer diameter of the second groove 1211; the thickness of the support member 122 along the first direction X is equal to the groove depth of the second groove 1211 along the first direction X.

[0038] 1 to 3 , in some embodiments, the battery cover assembly 10 further includes a sealing ring 14 , which is sleeved on the column 133 of the terminal 13 and located between the top plate 132 of the terminal 13 and the cover body 11 . The upper surface of the sealing ring 14 abuts against the lower surface of the top plate 132 .

[0039] Referring to Figures 1 to 3, in some embodiments, the battery cover assembly 10 further includes an upper plastic member 15, which is disposed on the cover body 11. The upper plastic member 15 is in the shape of a body of revolution and includes a first plastic portion 151 and a second plastic portion 152, with the second plastic portion 152 disposed on the inner side of the first plastic portion 151. A third groove 113 is defined on the side of the cover body 11 facing the upper plastic member 15. One end of the first plastic portion 151 along the first direction X is disposed in the third groove 113, and the other end of the first plastic portion 151 along the first direction X is disposed around the outer circumference of the top plate 132 of the terminal 13. The second plastic portion 152 is disposed between the top plate 132 and the cover body 11.

[0040] In some embodiments, the inner diameter of the second plastic portion 152 is larger than the outer diameter of the sealing ring 14 .

[0041] In some embodiments, the support member 122 is a steel sheet.

[0042] In some embodiments, the insulating ceramic member 121 and the support member 122 are both ring-shaped.

[0043] The present application also provides a cylindrical battery, including a battery housing and a battery cover assembly 10, wherein the battery cover assembly 10 is arranged on the battery housing.

Claims

1. A battery cover plate assembly, comprising: A cover plate body (11), the cover plate body (11) is provided with a first mounting hole (111) penetrating along a first direction; An insulating support assembly (12), the insulating support assembly (12) is provided with a second mounting hole (123) penetrating along the first direction; A pole column (13), the pole column (13) is passed through the cover plate body (11) and the insulating support assembly (12) by means of the first mounting hole (111) and the second mounting hole (123); The insulating support assembly (12) includes an integrally formed insulating ceramic part (121) and a support part (122); the insulating ceramic part (121) is arranged between the cover plate body (11) and the upper surface of the bottom plate (131) of the pole column (13); the support part (122) is arranged between the insulating ceramic part (121) and the upper surface of the bottom plate (131); Wherein, the axes of the cover plate body (11), the pole column (13) and the insulating support assembly (12) are coaxially arranged.

2. The battery cover assembly according to claim 1, wherein, The cover plate body (11) is provided with a first groove (112), and the insulating ceramic part (121) is arranged on the first groove (112); Wherein, taking the plane perpendicular to the first direction as a reference plane, the inner contour of the positive projection of the first groove (112) on the reference plane coincides with the positive projection of the inner circumference of the cover plate body (11) corresponding to the first mounting hole (111) on the reference plane.

3. The battery cover assembly according to claim 2, wherein, The inner diameter of the insulating ceramic part (121) is smaller than the inner diameter of the first groove (112).

4. The battery cover assembly according to claim 1, wherein, The insulating ceramic part (121) is provided with a second groove (1211), and the support part (122) is arranged on the second groove (1211); Wherein, taking the plane perpendicular to the first direction as a reference plane, the inner contour of the positive projection of the second groove (1211) on the reference plane coincides with the positive projection of the inner circumference of the insulating ceramic part (121) corresponding to the second mounting hole (123) on the reference plane.

5. The battery cover assembly according to claim 4, wherein, The inner diameter of the support part (122) is equal to the inner diameter of the second groove (1211); the outer diameter of the support part (122) is equal to the outer diameter of the second groove (1211); the thickness of the support part (122) along the first direction is equal to the groove depth of the second groove (1211) along the first direction.

6. The battery cover plate assembly according to any one of claims 1-5, further comprising a sealing ring (14), the sealing ring (14) is sleeved on the column body (133) of the pole column (13), and is located between the top plate (132) of the pole column (13) and the cover plate body (11); the upper surface of the sealing ring (14) abuts against the lower surface of the top plate (132).

7. The battery cover plate assembly according to any one of claims 1-5, further comprising an upper plastic (15), the upper plastic (15) is arranged on the cover plate body (11).

8. The battery cover assembly according to any one of claims 1-5, wherein, The support part (122) is a steel sheet.

9. The battery cover assembly according to any one of claims 1-5, wherein, Both the insulating ceramic part (121) and the support part (122) are annular.

10. A cylindrical battery, comprising a battery housing and a battery cover assembly (10) as described in any one of claims 1-9, wherein the battery cover assembly (10) is provided on the battery housing.

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