Cover plate assembly and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly and a single battery. The cover plate assembly comprises a cover plate body and an anti-explosion valve, a mounting groove is concavely formed in the bottom wall of the cover plate body, so that a protection part is formed between the groove bottom wall of the mounting groove and the top wall of the cover plate body; the anti-explosion valve is installed at a groove port of the installation groove in a matched mode, and the protection part and the anti-explosion valve are oppositely arranged. The protection part is directly formed on the cover plate body, so that the processing steps and process flows are reduced, the risk of failure rate increase caused by additional processes is reduced, the protection part is not easy to fall off, the protection effect on the explosion-proof valve can be improved, the production yield of the cover plate assembly and the single battery using the cover plate assembly is higher, and the production cost is reduced. And the use safety and reliability of the single battery are improved.

Description

Technical Field

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

[0002] In the prior art, the battery includes a shell, a cover, a battery cell, a pole, a connecting piece and other structures, wherein the battery cell is arranged inside the shell, the cover is sealed at the opening of the shell, the pole includes a positive pole and a negative pole, the positive pole and the negative pole are respectively connected to the positive and negative poles of the battery cell through the connecting piece, and the pole is used to achieve electrical connection with external electrical equipment.

[0003] An explosion-proof valve structure is provided on the cover of the battery. In the related art, an explosion-proof valve mounting hole is provided on the cover of the battery. The explosion-proof valve is provided as a thin sheet structure with a relatively small thickness, and the explosion-proof valve is welded to the explosion-proof valve mounting hole. When the air pressure inside the battery changes due to temperature changes, the explosion-proof valve can produce corresponding deformation, or the explosion-proof valve can explode to release pressure to avoid the problem of the battery shell bursting. In addition, a protective film is often affixed to the top of the explosion-proof valve to protect the explosion-proof valve. Since the film is adhered to the top cover by viscosity, when the glue fails, the film may fail and fall off, and no longer provide protection. In addition, the film requires additional processes for bonding and assembly, which will lead to increased labor costs, and there will be a defective rate in the bonding process, resulting in a decrease in the yield rate of battery products.

[0004] Therefore, there is an urgent need to provide a new type of cover plate assembly and single battery to solve the above technical problems in the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a cover plate assembly, which can better protect the explosion-proof valve, is simple and convenient to process, and can reduce production costs and improve the yield rate.

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

[0007] The cover assembly includes a cover body and an explosion-proof valve. The bottom wall of the cover body is recessed with an installation groove, so that a protective portion is formed between the bottom wall of the installation groove and the top wall of the cover body; the explosion-proof valve is installed in cooperation with the groove port of the installation groove, and the protective portion is arranged opposite to the explosion-proof valve.

[0008] Optionally, the top wall of the protection portion is higher than the top wall of the cover body.

[0009] Optionally, the bottom wall of the mounting groove is flush with the top wall of the cover body.

[0010] Optionally, the thickness of the protective portion is 0.2 mm to 0.5 mm.

[0011] Optionally, the mechanical strength of the explosion-proof valve is greater than the mechanical strength of the protection portion.

[0012] Optionally, the protection portion is provided with an exhaust hole.

[0013] Optionally, the exhaust hole is in any one of an oval, square, circular and triangular shape.

[0014] Optionally, the width of the exhaust hole is W, the thickness of the protection portion is H, and W≥2H.

[0015] Optionally, an outer edge ring of the slot port is provided with an installation step, and the explosion-proof valve is cooperatively installed on the installation step.

[0016] Another object of the present invention is to provide a single cell battery, which includes the cover plate assembly as described in any of the above solutions.

[0017] Beneficial effects:

[0018] The cover assembly of the present invention has a recessed mounting groove for mounting an explosion-proof valve on the bottom wall of the cover body, thereby forming a protective portion at the mounting groove of the cover body. The protective portion is arranged opposite the explosion-proof valve at the end of the mounting groove, thereby protecting the explosion-proof valve from damage by foreign objects. The protective portion is formed directly on the cover body, eliminating the need for an additional protective film, and thus eliminating the need for adhesive or welding processes to secure the protective film to the cover body. This reduces the number of processing steps and process flows, thereby reducing the risk of increased failure rates caused by additional processes. The protective portion is not easily detached, thereby enhancing the protective effect on the explosion-proof valve. Furthermore, the cover assembly and the single battery cells using the cover assembly have a higher production yield rate, thereby improving the safety and reliability of the single battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axonometric view of the cover assembly provided by a specific embodiment of the present utility model;

[0020] Figure 2 It is a longitudinal cross-sectional view of a cover plate assembly provided in a specific embodiment of the present utility model;

[0021] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0022] In the picture:

[0023] 100. Cover plate body; 110. Mounting groove; 111. Groove bottom wall; 112. Groove port; 120. Protective portion; 121. Exhaust hole; 130. Mounting step; 200. Explosion-proof valve. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Please refer to Figures 1 to 3 In this embodiment, the cover assembly includes a cover body 100 and an explosion-proof valve 200. The bottom wall of the cover body 100 is recessed with a mounting groove 110, so that a protective portion 120 is formed between the bottom wall 111 of the mounting groove 110 and the top wall of the cover body 100; the explosion-proof valve 200 is installed in cooperation with the groove port 112 of the mounting groove 110, and the protective portion 120 is arranged opposite to the explosion-proof valve 200.

[0029] In this embodiment, the cover plate assembly is provided with a mounting groove 110 for mounting the explosion-proof valve 200 on the bottom wall of the cover plate body 100, thereby forming a protective portion 120 at the mounting groove 110 of the cover plate body 100. The protective portion 120 is arranged opposite the explosion-proof valve 200 at the mounting groove port 112, thereby protecting the explosion-proof valve 200 and preventing foreign objects from damaging the explosion-proof valve 200. The protective portion 120 is formed directly on the cover plate body 100, without the need for an additional protective film, and there is no need to use a bonding or welding process to fix the protective film to the cover plate body 100, thereby reducing the processing steps and process flow, and also reducing the risk of increased failure rate caused by additional processes. In addition, the protective portion 120 is not easy to fall off, which can improve the protection of the explosion-proof valve 200 and increase the production yield of the cover plate assembly and the single battery using the cover plate assembly.

[0030] like Figure 3 As shown, the top wall of the protective portion 120 is higher than the top wall of the cover body 100. The protective portion 120 is arranged higher than the top wall of the cover body 100. This prevents the electrolyte from flowing from the protective portion 120 to the surface of the explosion-proof valve 200 when the electrolyte is injected from the injection hole on the cover body 100, thereby preventing the electrolyte from corroding and damaging the explosion-proof valve 200. This further enhances the protective effect of the protective portion 120 and improves the reliability of the explosion-proof valve 200.

[0031] Furthermore, the bottom wall 111 of the mounting groove 110 is flush with the top wall of the cover body 100. It should be noted that the mounting groove 110 is formed directly on the bottom wall of the cover body 100 using a stamping process, which is a simple and reliable processing method that can reduce production costs. Furthermore, the bottom wall 111 of the mounting groove 110 is flush with the top wall of the cover body 100, meaning that the height of the protrusion of the stamped protective portion 120 is equal to the thickness of the protective portion 120. This prevents electrolyte from flowing from the protective portion 120 to the surface of the explosion-proof valve 200, further improving safety.

[0032] In this embodiment, the thickness H of the protective portion 120 is 0.2 mm to 0.5 mm. The thickness of the protective portion 120 is determined by those skilled in the art based on the structure, size, material, and operating environment of the cover body 100. For example, the thickness H of the protective portion 120 can be selected from 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc., and is not specifically limited in this embodiment.

[0033] Please continue to refer to Figure 3The mechanical strength of the explosion-proof valve 200 is greater than that of the protective portion 120. This arrangement allows high-pressure gas to smoothly break through the protective portion 120 and release pressure when the internal pressure of the single cell exceeds the explosion-proof valve 200. This prevents the internal pressure of the single cell from continuing to increase, achieving reliable pressure relief and improving the safety and reliability of the single cell using the cover plate assembly.

[0034] In this embodiment, the protection portion 120 is provided with a vent hole 121. The vent hole 121 is used to reduce the mechanical strength of the protection portion 120 so that the gas in the single battery can be discharged from the vent hole 121 after the explosion-proof valve 200 releases pressure, thereby achieving the pressure relief function.

[0035] Furthermore, the exhaust hole 121 is in any of an ellipse, a square, a circle and a triangle. In this embodiment, the exhaust hole 121 is in a runway shape consisting of a rectangle and two semicircles, which is similar to an ellipse. Its extension direction is the same as the length direction of the explosion-proof valve 200, which will not be repeated here.

[0036] Specifically, the width of the vent hole 121 is W, and the thickness of the protective portion 120 is H, where W ≥ 2H. This configuration not only enables the vent hole 121 to achieve its pressure relief and exhaust function, but also maintains the structural strength of the protective portion 120 surrounding the vent hole 121 during processing, ensuring the mold strength during processing is not affected. It also prevents the outer edge of the vent hole 121 from bending or curling, thereby preventing damage to the internal explosion-proof valve 200.

[0037] Optionally, a mounting step 130 is provided around the outer edge of the slot port 112, and the explosion-proof valve 200 is mounted on this mounting step 130. This mounting step 130 reduces the thickness space occupied by the explosion-proof valve 200, without affecting the internal space of the single battery using the cover plate assembly, thereby increasing the energy density of the single battery. Furthermore, the thickness of the step structure is greater than that of the explosion-proof valve 200, and will not be further described here.

[0038] This embodiment also provides a single cell battery, comprising a cover plate assembly as described in any of the above-described solutions. This single cell battery utilizes any of the above-described cover plate assemblies, achieving all of their benefits, which will not be further elaborated here. Specifically, because the protective portion 120 is integrally formed with the cover plate body 100, processing steps and process flows are reduced, thereby reducing the risk of increased failure rates associated with additional processing steps. Furthermore, the protective portion 120 is not easily detached, enhancing protection for the explosion-proof valve 200, thereby improving the safety and reliability of the single cell battery utilizing this cover plate assembly.

[0039] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments 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. Cover plate assembly, characterized in that, include: A cover plate body (100), wherein a mounting groove (110) is recessed on the bottom wall of the cover plate body (100), so that a protective portion (120) is formed between the bottom wall (111) of the mounting groove (110) and the top wall of the cover plate body (100); An explosion-proof valve (200) is mounted in cooperation with the slot port (112) of the mounting slot (110), and the protection portion (120) is arranged opposite to the explosion-proof valve (200).

2. The cover plate assembly according to claim 1, wherein: The top wall of the protection portion (120) is higher than the top wall of the cover plate body (100).

3. The cover plate assembly according to claim 2, wherein: The bottom wall (111) of the installation groove (110) is flush with the top wall of the cover plate body (100).

4. The cover plate assembly according to claim 3, wherein: The thickness of the protection portion (120) is 0.2 mm to 0.5 mm.

5. The cover plate assembly according to claim 1, wherein: The mechanical strength of the explosion-proof valve (200) is greater than the mechanical strength of the protection portion (120).

6. The cover plate assembly according to claim 5, wherein: The protection portion (120) is provided with an exhaust hole (121).

7. The cover plate assembly according to claim 6, wherein: The exhaust hole (121) is in any one of an elliptical, square, circular and triangular shape.

8. The cover plate assembly according to claim 6, wherein: The width of the exhaust hole (121) is W, the thickness of the protection portion (120) is H, and W≥2H.

9. The cover plate assembly according to any one of claims 1 to 8, characterized in that: An outer edge ring of the groove port (112) is provided with an installation step (130), and the explosion-proof valve (200) is mounted on the installation step (130).

10. A single cell battery, characterized in that: The invention comprises the cover plate assembly according to any one of claims 1 to 9.

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