Battery cover plate assembly and lithium battery

Abstract

The utility model provides a battery cover plate assembly and a lithium battery, and relates to the technical field of batteries, the battery cover plate assembly comprises a battery cover plate main body, the battery cover plate main body is provided with an explosion-proof hole; the upper end surface of the battery cover plate main body is provided with an upper reinforcing rib extending along the circumferential direction of the explosion-proof hole, the upper reinforcing rib surrounds to form an upper through hole, and the upper through hole is communicated with the explosion-proof hole; the lower end face of the upper reinforcing rib forms a welding plane, and the welding plane is located at the upper end of the anti-explosion hole. An assembling groove used for assembling an anti-explosion valve is formed in the welding plane. According to the battery cover plate assembly provided by the utility model, the battery cover plate main body is provided with the upper reinforcing ribs, and the upper reinforcing ribs are arranged along the explosion-proof holes, so that when the battery cover plate main body deforms, the upper reinforcing ribs can ensure the flatness of the explosion-proof holes, and the battery cover plate main body is not easy to deform when a pressure test is carried out on the battery cover plate main body.

Description

Technical Field

[0001] This utility model relates to the technical field of batteries, and in particular to a battery cover assembly and a lithium battery. Background Technology

[0002] The existing battery has a safety protection device on the cover plate. A longitudinal through hole is punched into the top cover of the battery, and then an explosion-proof valve welding groove is set on the back of the cover plate to weld the explosion-proof sheet. This type of battery top cover has poor strength and is easy to deform. It cannot meet the flatness requirements of the battery top cover when welding the explosion-proof sheet, resulting in high processing requirements. Utility Model Content

[0003] The purpose of this utility model is to provide a battery cover assembly and a lithium battery to alleviate the technical problems of poor strength, easy deformation, and inability to meet the flatness requirements of the battery cover when welding explosion-proof sheets, which leads to high processing requirements.

[0004] This utility model provides a battery cover assembly, including a battery cover body, on which explosion-proof holes are provided;

[0005] An upper reinforcing rib extending circumferentially along the explosion-proof hole is provided on the upper end surface of the battery cover body, and the upper reinforcing rib surrounds to form an upper through hole, which communicates with the explosion-proof hole.

[0006] The lower end face of the upper reinforcing rib forms a welding plane, and the welding plane is located at the upper end of the explosion-proof hole;

[0007] An assembly groove for assembling explosion-proof valves is provided on the welding plane.

[0008] In an optional embodiment, an explosion-proof film is also included, which is fixed to the upper reinforcing rib and connected to the upper end face of the upper reinforcing rib.

[0009] In an optional embodiment, the explosion-proof hole is square, elliptical, or racetrack-shaped.

[0010] In an optional embodiment, the welding plane is higher than the lower end face of the battery cover body.

[0011] In an optional embodiment, the orthographic projection of the upper through hole is completely located within the explosion-proof hole.

[0012] In an optional embodiment, an explosion-proof valve is also included, which is assembled in the assembly groove and the lower end face of the explosion-proof valve is flush with the welding plane.

[0013] In an optional embodiment, the welding plane is welded to the explosion-proof valve.

[0014] This utility model provides a battery cover assembly with an upper reinforcing rib on the battery cover body. The upper reinforcing rib is set along the explosion-proof hole. When the battery cover body deforms, the upper reinforcing rib can ensure the flatness of the explosion-proof hole and is not easily deformed when the battery cover body is subjected to pressure test.

[0015] This utility model provides a lithium battery, including the battery cover assembly described in any of the foregoing embodiments.

[0016] Compared with the prior art, the lithium battery provided by this utility model has the battery cover assembly provided by this utility model, and thus has all the beneficial effects of the battery cover assembly provided by this utility model. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 An exploded view of the battery cover assembly provided in an embodiment of this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the main body of the battery cover assembly shown.

[0020] Figure 3 for Figure 2 A schematic diagram of the longitudinal section of the main body of the battery cover shown;

[0021] Figure 4 for Figure 3 A partial enlarged view of section A of the structural schematic diagram of the longitudinal section of the battery cover body shown;

[0022] Figure 5 for Figure 1 A schematic diagram of the battery cover body of the battery cover assembly from another angle;

[0023] Figure 6 An exploded view of a lithium battery provided in an embodiment of this utility model.

[0024] Icons: 100 - Battery cover body; 200 - Upper reinforcing rib; 300 - Upper through hole; 400 - Assembly slot; 500 - Welding plane; 600 - Explosion-proof hole; 700 - Explosion-proof film; 800 - Explosion-proof valve. Detailed Implementation

[0025] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0029] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0030] Example

[0031] Reference Figures 1-5 This utility model provides a battery cover assembly, including a battery cover body 100, on which an explosion-proof hole 600 is provided;

[0032] An upper reinforcing rib 200 extending circumferentially along the explosion-proof hole 600 is provided on the upper end surface of the battery cover body 100, and the upper reinforcing rib 200 surrounds to form an upper through hole 300, the upper through hole 300 communicating with the explosion-proof hole 600.

[0033] The lower end face of the upper reinforcing rib 200 forms a welding plane 500, and the welding plane 500 is located at the upper end of the explosion-proof hole 600.

[0034] An assembly groove 400 for assembling the explosion-proof valve 800 is provided on the welding plane 500.

[0035] In some embodiments, the battery cover body 100 is provided with an explosion-proof hole 600, and an upper reinforcing rib 200 is provided on the upper end surface of the battery cover body 100. The upper reinforcing rib 200 is arranged around the explosion-proof hole 600. The upper reinforcing rib 200 increases the strength of the battery cover body 100 around the explosion-proof hole 600, making the battery cover body 100 around the explosion-proof hole 600 less prone to deformation. This ensures that the flatness of the battery cover body 100 around the explosion-proof hole 600 can meet the requirements for welding the explosion-proof valve 800.

[0036] This solves the problem of poor strength and easy deformation of the battery cover body in existing technologies, which leads to high processing requirements.

[0037] The upper reinforcing rib 200 forms an upper through hole 300, which is connected to the explosion-proof hole 600, thus ensuring that the gas inside the lithium battery can be discharged through the explosion-proof hole 600; the lower end face of the upper reinforcing rib 200 forms a welding plane 500, and an assembly groove 400 is provided on the welding plane 500; when the explosion-proof valve 800 needs to be installed, the periphery of the explosion-proof valve 800 is installed in the assembly groove 400, so that the explosion-proof valve 800 can seal the explosion-proof hole 600.

[0038] In an optional embodiment, an explosion-proof film 700 is also included, which is fixed to the upper reinforcing rib 200 and connected to the upper end face of the upper reinforcing rib 200.

[0039] In an optional embodiment, the explosion-proof hole 600 is square, elliptical, or racetrack-shaped.

[0040] In some embodiments, an explosion-proof film 700 is provided on the upper reinforcing rib 200, the outer contour of which is generally smaller than the outer contour of the upper reinforcing rib 200; the explosion-proof film 700 is pasted on the upper reinforcing rib 200, and the shape of the explosion-proof film 700 is similar to the shape of the explosion-proof hole 600; generally, an exhaust hole is also provided on the explosion-proof film 700, and the exhaust hole can be of various shapes, such as Y-shaped.

[0041] The explosion-proof film 700 is made of PET film, PE film, PP film or PI film; the explosion-proof film 700 of this material has high tensile strength and high flexibility, while also meeting the requirements of high temperature resistance and corrosion resistance.

[0042] The explosion-proof hole 600 on the battery cover body 100 can be of various shapes, such as square, oval or racetrack shaped, as well as other conventional shapes of explosion-proof hole 600.

[0043] In an optional embodiment, the welding plane 500 is higher than the lower end face of the battery cover body 100.

[0044] In an optional embodiment, the orthographic projection of the upper through hole 300 is completely located within the explosion-proof hole 600.

[0045] In some embodiments, the welding plane 500 is higher than the lower end face of the battery cover body 100. When the explosion-proof valve 800 is welded to the welding plane 500, a downwardly protruding weld will be formed on the welding plane 500 and the explosion-proof valve 800. In order to avoid the weld protruding and affecting the quality of the lithium battery, the welding plane 500 is higher than the lower end face of the battery cover body 100, that is, the weld formed between the welding plane 500 and the explosion-proof valve 800 will not protrude, thus avoiding the weld from affecting the internal structure of the lithium battery.

[0046] Among them, the upper through hole 300, the explosion-proof hole 600 and the assembly groove 400 have similar shapes, and the outer contours of the upper through hole 300, the assembly groove 400 and the explosion-proof hole 600 increase in size in sequence. The orthographic projection of the upper through hole 300 is located inside the assembly groove 400, and the orthographic projection of the assembly groove 400 is located inside the explosion-proof hole 600.

[0047] In an optional embodiment, an explosion-proof valve 800 is also included, which is assembled in the assembly groove 400, and the lower end face of the explosion-proof valve 800 is flush with the welding plane 500.

[0048] In an optional embodiment, the welding plane 500 is welded to the explosion-proof valve 800.

[0049] In some embodiments, the explosion-proof valve 800 is assembled in the assembly groove 400, and the thickness of the edge of the explosion-proof valve 800 matches the depth of the assembly groove 400. After the explosion-proof valve 800 is assembled in the assembly groove 400, the lower end face of the explosion-proof valve 800 is flush with the welding plane 500, which is beneficial for welding the welding plane 500 and the explosion-proof valve 800.

[0050] This utility model provides a battery cover assembly in which the battery cover body 100 is provided with an upper reinforcing rib 200. The upper reinforcing rib 200 is provided along the explosion-proof hole 600. When the battery cover body 100 is deformed, the upper reinforcing rib 200 can ensure the flatness of the explosion-proof hole 600 and is not easily deformed when the battery cover body 100 is subjected to pressure test.

[0051] Reference Figure 6 This utility model provides a lithium battery, including the battery cover assembly described in any of the foregoing embodiments.

[0052] Compared with the prior art, the lithium battery provided by this utility model has the battery cover assembly provided by this utility model, and thus has all the beneficial effects of the battery cover assembly provided by this utility model.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery cover plate assembly, characterized by, The battery cover plate assembly comprises a battery cover plate body (100) provided with an explosion-proof hole (600) on the battery cover plate body (100); An upper reinforcing rib (200) extending along the circumferential direction of the explosion-proof hole (600) is arranged on the upper end surface of the battery cover plate body (100), and the upper reinforcing rib (200) surrounds an upper through hole (300) in communication with the explosion-proof hole (600); A welding plane (500) is formed on the lower end surface of the upper reinforcing rib (200), and the welding plane (500) is located at the upper end of the explosion-proof hole (600); An assembly groove (400) for assembling an explosion-proof valve (800) is arranged on the welding plane (500).

2. The battery cover plate assembly of claim 1, wherein, Further comprising an explosion-proof film (700) fixed on the upper reinforcing rib (200) and connected with the upper end surface of the upper reinforcing rib (200).

3. The battery cover plate assembly of claim 2, wherein, The explosion-proof hole (600) is square, oval or track-shaped.

4. The battery cover plate assembly of claim 2, wherein, The welding plane (500) is higher than the lower end surface of the battery cover plate body (100).

5. The battery cover plate assembly of claim 1, wherein, The orthographic projection of the upper through hole (300) is completely located in the explosion-proof hole (600).

6. The battery cover plate assembly of claim 1, wherein, Further comprising an explosion-proof valve (800) assembled in the assembly groove (400), and the lower end surface of the explosion-proof valve (800) is flush with the welding plane (500).

7. The battery cover plate assembly of claim 6, wherein, The welding plane (500) is welded with the explosion-proof valve (800).

8. A lithium battery, characterized by, The battery cover plate assembly comprises the battery cover plate assembly according to any one of claims 1-7. The battery cover plate assembly comprises the battery cover plate assembly according to any one of claims 1-7.

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