Battery cover plate assembly and lithium battery
By adding reinforcing ribs and assembly grooves to the battery cover, the problem of welding slag spatter was solved, the strength and welding quality of the battery cover were enhanced, the process requirements were reduced, and the production efficiency was improved.
Patent Information
- Application Number
- CN202520208514.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-10
AI Technical Summary
When welding explosion-proof valves onto existing battery covers, welding slag easily splashes into the battery, resulting in high welding process requirements and insufficient strength of the battery top cover, making it difficult to meet processing requirements.
A lower reinforcing rib is set on the main body of the battery cover to form a lower through hole and an assembly groove. The explosion-proof valve is placed into the assembly groove from the upper end face and welded together with the upper reinforcing rib and the welding plane to avoid welding slag splashing and enhance the strength of the cover.
It effectively prevents welding slag from splashing into the battery, reduces welding process requirements, improves the strength and welding quality of the battery cover, and increases production efficiency.
Smart Images
Figure CN223911796U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of battery, especially a battery cover plate assembly and lithium battery. BACKGROUND
[0002] The existing battery is provided with a safety protection device on the cover plate, a longitudinal through hole is punched on the battery top cover, then a welding groove for an explosion-proof valve is arranged on the back surface of the cover plate, and the explosion-proof valve is welded; the battery top cover has poor strength and is easy to deform, cannot meet the requirement of the flatness of the battery top cover when welding the explosion-proof valve, and leads to high processing requirement;
[0003] And the welding slag is generated in the welding process of the explosion-proof valve from the back surface of the top cover (the inner side of the battery cell), the flying particles have the risk of falling into the battery cell, and the welding process requires high. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a battery cover plate assembly and lithium battery to relieve the risk of welding slag flying into the battery in the process of welding the explosion-proof valve and the battery cover plate main body.
[0005] The utility model provides a battery cover plate assembly, which comprises a battery cover plate main body, and an explosion-proof hole is arranged on the battery cover plate main body;
[0006] A lower reinforcing rib extending along the circumferential direction of the explosion-proof hole is arranged on the lower end surface of the battery cover plate main body, the lower reinforcing rib surrounds a lower through hole, and the lower through hole is communicated with the explosion-proof hole;
[0007] The lower reinforcing rib extends to the lower end of the explosion-proof hole and forms an assembly groove for assembling an explosion-proof valve.
[0008] In optional embodiments, the explosion-proof hole is square, oval or in the shape of a racetrack.
[0009] In optional embodiments, the orthographic projection of the explosion-proof hole completely covers the lower through hole.
[0010] In optional embodiments, an upper reinforcing rib extending along the circumferential direction of the explosion-proof hole is arranged on the upper end surface of the battery cover plate main body;
[0011] And the upper end surface of the battery cover plate main body between the upper reinforcing rib and the explosion-proof hole forms a welding plane.
[0012] In optional embodiments, the battery cover plate assembly further comprises an explosion-proof adhesive film, which is fixed on the upper reinforcing rib and connected with the upper end surface of the upper reinforcing rib.
[0013] In optional embodiments, the battery cover plate assembly further comprises an explosion-proof valve, which is assembled in the assembly groove, and the upper end surface of the explosion-proof valve is flush with the welding plane.
[0014] In an optional embodiment, the explosion-proof valve is welded with the welding plane.
[0015] In an optional embodiment, an upper groove is arranged on an upper end surface of the battery cover plate body, and the upper groove is arranged along a circumferential direction of the explosion-proof hole and communicates with the explosion-proof hole; the upper groove forms a welding plane for welding with the explosion-proof valve.
[0016] The lower end surface of the battery cover plate body of the battery cover plate assembly is provided with a lower reinforcing rib, and the explosion-proof valve is placed on the assembly groove from the upper end surface of the battery cover plate body; in this way, when the explosion-proof valve is welded, the welding slag and the like is avoided from splashing into the interior of the battery, the requirement on the welding process is reduced, and the production efficiency is improved.
[0017] The utility model provides a kind of lithium battery, including the battery cover plate assembly of any one of the preceding embodiment.
[0018] Compared with prior art, the lithium battery provided by the utility model has the battery cover plate assembly provided by the utility model, so it has all the beneficial effects of the battery cover plate assembly provided by the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0019] To more clearly illustrate the specific embodiments of the utility model or the technical solutions in prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0020] Figure 1 The battery cover plate assembly is provided with an explosion diagram for the embodiments of the utility model;
[0021] Figure 2 For Figure 1 The battery cover plate body of the battery cover plate assembly is provided with a structure schematic view as shown in the figure;
[0022] Figure 3 For Figure 2 Another angle structure schematic view of the battery cover plate body is provided as shown in the figure;
[0023] Figure 4 For Figure 1 Another structure schematic view of the battery cover plate body of the battery cover plate assembly is provided as shown in the figure;
[0024] Figure 5 The structure schematic view of the lithium battery provided by the embodiments of the utility model is provided.
[0025] Icon: 100-battery cover plate body; 200-explosion-proof valve; 300-explosion-proof film; 400-assembly groove; 500-upper groove; 600-lower through hole; 700-upper reinforcing rib; 800-welding plane; 900-lower reinforcing rib; 110-explosion-proof hole. DETAILED DESCRIPTION
[0026] The terms "first", "second", "third", etc. are only used for differentiation and description, and do not represent the arrangement sequence number, and cannot be understood as indicating or implying relative importance.
[0027] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0028] In the description of the present application, it should be pointed out that the terms "inner", "outer", "left", "right", "upper", "lower", etc. indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.
[0029] In the description of the present application, unless otherwise explicitly specified and limited, the terms "set", "mounted", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements.
[0030] The technical solutions of the present application will be described below in conjunction with the drawings.
[0031] Embodiments
[0032] Reference Figures 1-4 The utility model provides a battery cover plate assembly, including battery cover plate body 100, be provided with explosion -proof hole 110 on battery cover plate body 100,
[0033] The lower end surface of the battery cover plate body 100 is provided with a lower reinforcing rib 900 extending along the circumference of the explosion-proof hole 110, the lower reinforcing rib 900 surrounds a lower through hole 600, and the lower through hole 600 communicates with the explosion-proof hole 110;
[0034] The lower reinforcing rib 900 extends to the lower end of the explosion-proof hole 110 and forms an assembly groove 400 for assembling the explosion-proof valve 200.
[0035] In some embodiments, a lower reinforcing rib 900 is arranged on the lower end surface of the battery cover plate body 100 of the battery cover plate assembly, the lower through hole 600 surrounded by the lower reinforcing rib 900 is smaller than the explosion-proof hole 110; the part of the lower reinforcing rib 900 extending to the explosion-proof hole 110 forms an assembly groove 400; the explosion-proof valve 200 is placed on the assembly groove 400, at this time the explosion-proof valve 200 can seal the explosion-proof hole 110 but cannot pass through the lower through hole 600; since the explosion-proof valve 200 is put into the explosion-proof hole 110 from the upper end of the battery cover plate body 100, the operation is performed at the upper end of the battery cover plate body 100 when welding the explosion-proof valve 200, so that the welding slag and the like can be effectively prevented from falling into the battery during welding; and the requirement of the welding process is reduced, and the welding efficiency is effectively improved.
[0036] In optional embodiments, the explosion-proof hole 110 is square, oval or track-shaped.
[0037] Among them, the explosion-proof hole 110 on the battery cover plate body 100 can be various shapes, such as square, oval or track-shaped, and other conventional shapes of the explosion-proof hole 110.
[0038] In optional embodiments, the orthographic projection of the explosion-proof hole 110 completely covers the lower through hole 600.
[0039] In some embodiments, the explosion-proof hole 110 is similar to the upper through hole, the explosion-proof hole 110 is larger than the upper through hole, and the orthographic projection of the explosion-proof hole 110 completely covers the upper through hole; when the explosion-proof hole 110 and the upper through hole are circular, the centers of the explosion-proof hole 110 and the upper through hole coincide; when the explosion-proof hole 110 and the upper through hole are both rectangular, the centers of the explosion-proof hole 110 and the upper through hole coincide.
[0040] In optional embodiments, an upper reinforcing rib 700 extending along the circumferential direction of the explosion-proof hole 110 is arranged on the upper end surface of the battery cover plate body 100.
[0041] And the upper end surface of the battery cover plate body 100 between the upper reinforcing rib 700 and the explosion-proof hole 110 forms a welding plane 800.
[0042] In optional embodiments, an explosion-proof film 300 is further included, the explosion-proof film 300 is fixed on the upper reinforcing rib 700 and connected with the upper end surface of the upper reinforcing rib 700.
[0043] In some embodiments, an upper reinforcing rib 700 is arranged on the upper end surface of the battery cover plate body 100, and the upper reinforcing rib 700 is at a certain distance from the edge of the explosion-proof hole 110, that is, the part of the battery cover plate body 100 between the upper reinforcing rib 700 and the explosion-proof hole 110 forms a welding plane 800; when the explosion-proof valve 200 is welded with the battery cover plate body 100, the welding seam between the explosion-proof valve 200 and the battery cover plate body 100 does not affect the explosion-proof film 300 pasted on the upper reinforcing rib 700.
[0044] The upper reinforcing rib 700 can increase the strength of the battery cover plate body 100, so that the battery cover plate body 100 around the explosion-proof hole 110 is not easy to deform, and the end surface around the explosion-proof hole 110 can remain flat when the explosion-proof valve 200 is welded, thereby improving the welding quality of the explosion-proof valve 200.
[0045] In optional embodiments, the explosion-proof valve 200 is arranged in the assembly groove 400, and the upper end surface of the explosion-proof valve 200 is flush with the welding plane 800.
[0046] In optional embodiments, the explosion-proof valve 200 is welded with the welding plane 800.
[0047] In some embodiments, the thickness of the explosion-proof valve 200 matches the depth of the assembly groove 400, and after the explosion-proof valve 200 is arranged in the assembly groove 400, the upper end surface of the explosion-proof valve 200 is flush with the welding plane 800, which is conducive to the welding of the explosion-proof valve 200 with the welding plane 800 and improves the welding quality of the explosion-proof valve 200. Generally, there is a certain tolerance between the upper end surface of the explosion-proof valve 200 and the welding plane 800, which can meet the welding process requirements.
[0048] The welding plane 800 is at a certain distance from the upper end surface of the upper reinforcing rib 700, so that when the welding plane 800 produces a welding seam or other protrusions, it does not affect the assembly of the explosion-proof film 300 on the upper reinforcing rib 700.
[0049] The upper reinforcing rib 700 is at a certain distance from the explosion-proof hole 110 and forms a welding plane 800, which is conducive to the welding of the explosion-proof valve 200 with the welding plane 800, improves the welding quality, and firmly connects the edge of the explosion-proof valve 200 with the welding plane 800.
[0050] In optional embodiments, an upper groove 500 is arranged on the upper end surface of the battery cover plate body 100, and the upper groove 500 is arranged along the circumference of the explosion-proof hole 110 and communicates with the explosion-proof hole 110; the upper groove 500 forms a welding plane 800 for welding with the explosion-proof valve 200.
[0051] In some embodiments, an upper recess 500 is arranged on the upper end surface of the battery cover plate body 100, the upper recess 500 forms a welding plane 800 for welding with the explosion-proof valve 200; the explosion-proof film 300 is fixed on the battery cover plate body 100 and covers the upper recess 500; that is, the outer contour of the explosion-proof film 300 is greater than the outer contour of the upper recess 500, so as to ensure that the explosion-proof film 300 can completely cover the upper recess 500, that is, the explosion-proof film 300 can also completely cover the explosion-proof valve 200.
[0052] The lower end surface of the battery cover plate body 100 of the battery cover plate assembly provided by the utility model is provided with a lower reinforcing rib 900, and the explosion-proof valve 200 is placed on the assembly groove 400 from the upper end surface of the battery cover plate body 100; in this way, when the explosion-proof valve 200 is welded, the welding slag and the like is avoided from splashing into the inside of the battery, the requirement on the welding process is reduced, and the production efficiency is improved.
[0053] Referring to Figure 5 The utility model provides a kind of lithium battery, including the battery cover plate assembly described in any one of preceding embodiment.
[0054] Compared with prior art, the lithium battery provided by the utility model has the battery cover plate assembly provided by the utility model, so it has all the beneficial effects of the battery cover plate assembly provided by the utility model.
[0055] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the 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 (110) on the battery cover plate body (100); A lower reinforcing rib (900) extending along the circumferential direction of the explosion-proof hole (110) is arranged on the lower end surface of the battery cover plate body (100), the lower reinforcing rib (900) surrounds a lower through hole (600), and the lower through hole (600) communicates with the explosion-proof hole (110); The lower reinforcing rib (900) extends to the lower end of the explosion-proof hole (110) and forms an assembly groove (400) for assembling an explosion-proof valve (200).
2. The battery cover plate assembly of claim 1, wherein, The explosion-proof hole (110) is square, oval or racetrack-shaped.
3. The battery cover plate assembly of claim 1, wherein, The orthographic projection of the explosion-proof hole (110) completely covers the lower through hole (600).
4. The battery cover plate assembly of claim 1, wherein, An upper reinforcing rib (700) extending along the circumferential direction of the explosion-proof hole (110) is arranged on the upper end surface of the battery cover plate body (100); The upper end surface of the battery cover plate body (100) between the upper reinforcing rib (700) and the explosion-proof hole (110) forms a welding plane (800).
5. The battery cover plate assembly of claim 4, wherein, An explosion-proof film (300) is further arranged on the upper reinforcing rib (700) and connected to the upper end surface of the upper reinforcing rib (700).
6. The battery cover plate assembly of claim 4, wherein, An explosion-proof valve (200) is further assembled in the assembly groove (400), and the upper end surface of the explosion-proof valve (200) is flush with the welding plane (800).
7. The battery cover plate assembly of claim 6, wherein, The explosion-proof valve (200) is welded to the welding plane (800).
8. The battery cover plate assembly of claim 1, wherein, An upper groove (500) is arranged on the upper end surface of the battery cover plate body (100), the upper groove (500) is arranged along the circumferential direction of the explosion-proof hole (110) and communicates with the explosion-proof hole (110), and the upper groove (500) forms a welding plane (800) for welding with the explosion-proof valve (200).
9. A lithium battery, characterized by The battery cover plate assembly comprises the battery cover plate assembly according to any one of claims 1-8.