Cover plate assembly and battery

Abstract

The utility model relates to the technical field of battery top covers, in particular to a cover plate assembly and a battery. The explosion-proof valve is arranged on the light aluminum sheet; a release part is arranged on the upper surface of the smooth aluminum sheet at the explosion-proof valve mounting hole position; wherein the releasing part is in a wave shape; according to the utility model, the release part is arranged at the explosion-proof valve mounting position on the upper surface of the polished aluminum sheet, and the release part is designed to be wave-shaped, so that the deformation of the explosion-proof valve is reduced, and the explosion-proof valve is prevented from being exploded in advance due to the deformation; meanwhile, the electrolyte is prevented from flowing into the anti-explosion valve along the light aluminum sheet to pollute the anti-explosion valve; and the deformation of the anti-explosion valve can be reduced by reducing the stress of the anti-explosion valve.

Description

Technical Field

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

[0002] In the structure of lithium batteries, the cover plate is the most important structural component. In order to prevent the explosion-proof valve from bursting prematurely, some related technologies increase the rib features to reduce the deformation of the explosion-proof valve and reduce the premature bursting of the explosion-proof valve. At the same time, the electrolyte is blocked from flowing into the explosion-proof valve along the aluminum sheet. However, if the aluminum sheet is deformed, it will still cause the explosion-proof valve to burst prematurely.

[0003] Therefore, how to prevent the explosion-proof valve from being affected by the light aluminum sheet and causing premature breakage is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0004] The utility model provides a cover plate assembly and a battery to solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the utility model provides a cover plate assembly, including: a plain aluminum sheet; and an explosion-proof valve arranged on the plain aluminum sheet; and a release portion is arranged on the upper surface of the plain aluminum sheet at the explosion-proof valve installation hole; wherein the release portion is wavy.

[0006] Furthermore, the thickness of the release portion is no more than 3 mm.

[0007] Furthermore, a protective sheet is provided on the top surface of the release portion.

[0008] Furthermore, a pole structure is provided on the bare aluminum sheet; wherein the pole structure comprises a positive pole and a negative pole.

[0009] Furthermore, the lower surface of the smooth aluminum sheet is provided with lower plastic.

[0010] Furthermore, the upper halves of the positive electrode column and the negative electrode column are exposed above the bare aluminum sheet.

[0011] Furthermore, the lower halves of the positive electrode column and the negative electrode column extend between the lower surface of the bare aluminum sheet and the upper surface of the lower plastic.

[0012] Furthermore, a sealing ring is sleeved on the lower half of the positive electrode column and the negative electrode column; wherein the bottom surface of the sealing ring abuts against the upper surface of the lower plastic.

[0013] Furthermore, the upper half of the positive pole and the negative pole are sleeved with an upper plastic; wherein the bottom surface of the upper plastic abuts against the upper surface of the plain aluminum sheet.

[0014] In a second aspect, the utility model further provides a battery, comprising: a battery cell and a cover plate assembly as described above; wherein the cover plate assembly is arranged on the top surface of the battery cell.

[0015] Compared with the prior art, the embodiments of the utility model have the following beneficial effects: by arranging a release portion at the installation position of the explosion-proof valve on the upper surface of the smooth aluminum sheet, and by designing the release portion to be wavy, not only the deformation of the explosion-proof valve is reduced, and the early explosion of the explosion-proof valve caused by the deformation is avoided; at the same time, the electrolyte is blocked from flowing into the explosion-proof valve along the smooth aluminum sheet, thereby contaminating the explosion-proof valve; and the deformation of the explosion-proof valve can be reduced by reducing the force on the explosion-proof valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 An explosion of the best embodiment of the cover assembly of the utility model;

[0018] Figure 2 It is a cross-sectional view of the cover plate assembly of the utility model;

[0019] Figure 3 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0020] Among them, 1. plain aluminum sheet; 2. explosion-proof valve; 3. release part; 4. protective sheet; 51. negative pole; 52. positive pole; 6. upper plastic; 7. sealing ring; 8. lower plastic. DETAILED DESCRIPTION

[0021] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0022] See also Figures 1 to 3 , Figure 1 An explosion of the best embodiment of the cover assembly of the utility model; Figure 2 It is a cross-sectional view of the cover plate assembly of the utility model. Figure 3 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0023] like Figures 1 to 3As shown, at least one embodiment provides a cover plate assembly, including: a plain aluminum sheet 1; and an explosion-proof valve 2 arranged on the plain aluminum sheet 1; and a release portion 3 is arranged on the upper surface of the plain aluminum sheet 1 at the installation hole of the explosion-proof valve 2; and a protective sheet 4 is arranged on the top surface of the release portion 3. The main function of the release portion 3 is to disperse the tearing force at the position of the explosion-proof valve 2. At the same time, the release portion 3 is higher than the top surface of the plain aluminum sheet 1, and can also prevent the electrolyte from contaminating the explosion-proof valve 2 and the explosion-proof valve protective sheet 4. In order to better reduce the deformation of the explosion-proof valve 2 and prevent electrolyte contamination, the release portion 3 is wavy. Specifically, the release portion 3 is an annular wavy structure, and the protective sheet 4 covers the center position of the release portion 3, such as Figure 3 As shown, the thickness of the release portion 3 is no more than 3 mm, L≤3 mm.

[0024] Please continue reading Figure 1 .like Figure 1 As shown, in some embodiments, a pole structure is provided on the bare aluminum sheet 1; wherein the pole structure includes a positive pole 52 and a negative pole 51, and the positive pole 52 and the negative pole 51 are symmetrically arranged along the center line of the bare aluminum sheet 1. A lower plastic 8 is provided on the lower surface of the bare aluminum sheet 1. It should be further explained that the upper half of the positive pole 52 and the negative pole 51 are exposed above the bare aluminum sheet 1. The lower half of the positive pole 52 and the negative pole 51 extend between the lower surface of the bare aluminum sheet 1 and the upper surface of the lower plastic 8. In order to seal the assembly gap between the bare aluminum sheet 1 and the positive pole 52 and the negative pole 51, a sealing ring 7 is sleeved on the lower half of the positive pole 52 and the negative pole 51; wherein the bottom surface of the sealing ring 7 and the upper surface of the lower plastic 8 are against each other. The upper half of the positive pole 52 and the negative pole 51 are sleeved with an upper plastic 6 ; wherein the bottom surface of the upper plastic 6 abuts against the upper surface of the plain aluminum sheet 1 .

[0025] Some embodiments further provide a battery, comprising: a battery cell and a cover plate assembly as described above; wherein the cover plate assembly is disposed on the top surface of the battery cell.

[0026] In summary, by arranging the release portion 3 at the installation position of the explosion-proof valve 2 on the upper surface of the bare aluminum sheet 1 and designing the release portion 3 to be wavy, not only the deformation of the explosion-proof valve 2 is reduced, and the early explosion of the explosion-proof valve 2 caused by the deformation is avoided; at the same time, the electrolyte is blocked from flowing into the explosion-proof valve along the bare aluminum sheet 1, thereby contaminating the explosion-proof valve 2; and the deformation of the explosion-proof valve 2 can be reduced by reducing the force on the explosion-proof valve 2.

[0027] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A cover plate assembly, characterized in that: include: Plain aluminum sheet (1); and An explosion-proof valve (2) provided on the plain aluminum sheet (1); as well as A release portion (3) is provided on the upper surface of the smooth aluminum sheet (1) at the installation hole of the explosion-proof valve (2); wherein The release portion (3) is wave-shaped.

2. The cover plate assembly according to claim 1, characterized in that: The thickness of the release portion (3) is no more than 3 mm.

3. The cover plate assembly according to claim 2, characterized in that: A protective sheet (4) is provided on the top surface of the release portion (3).

4. The cover plate assembly according to claim 3, characterized in that: The bare aluminum sheet (1) is provided with a pole structure; wherein The pole structure comprises a positive pole (52) and a negative pole (51).

5. The cover plate assembly according to claim 4, characterized in that: The lower surface of the smooth aluminum sheet (1) is provided with lower plastic (8).

6. The cover plate assembly according to claim 5, characterized in that: The upper halves of the positive pole (52) and the negative pole (51) are exposed above the plain aluminum sheet (1).

7. The cover plate assembly according to claim 6, wherein: The lower halves of the positive pole (52) and the negative pole (51) extend between the lower surface of the bare aluminum sheet (1) and the upper surface of the lower plastic (8).

8. The cover plate assembly according to claim 7, characterized in that: The lower half of the positive electrode column (52) and the negative electrode column (51) are sleeved with a sealing ring (7); wherein The bottom surface of the sealing ring (7) abuts against the upper surface of the lower plastic (8).

9. The cover plate assembly according to claim 8, characterized in that: The upper half of the positive pole (52) and the negative pole (51) are covered with an upper plastic (6); The bottom surface of the upper plastic (6) abuts against the upper surface of the smooth aluminum sheet (1).

10. A battery, characterized in that: include: A battery cell and a cover assembly as described in any one of claims 1 to 9 above; in The cover plate assembly is arranged on the top surface of the battery cell.

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