Battery cover plate assembly and secondary battery
By setting protrusions and grooves on the main body of the battery cover, the connection between the tabs and the terminals is simplified, solving the problems of complex structure and high risk of leakage of existing battery cover, and realizing a simpler and lower cost battery cover design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU GREAT POWER ENERGY & TECH CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-05
AI Technical Summary
Existing square battery cover plates have complex structures, high costs, and a high risk of leakage.
The battery cover body has first and second protrusions to simplify the connection between the tabs and the terminals, reduce assembly holes, and lower the sealing difficulty. The use of lower plastic and retaining rings improves assembly stability.
This reduces the structural complexity and cost of the battery cover assembly, while also reducing the risk of leakage.
Smart Images
Figure CN224204203U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of batteries, and in particular to a battery cover assembly and a secondary battery. Background Technology
[0002] The existing square cell design includes a cover plate assembly, a core, an insulating component, and an aluminum shell. The cover plate assembly has two terminals, a positive terminal and a negative terminal, and includes a terminal terminal, a sealing component, and an insulating component, etc., which are assembled into a cover plate through mechanical assembly or injection molding processes.
[0003] Existing battery covers have complex structures, high costs, and a high risk of leakage. Utility Model Content
[0004] The purpose of this invention is to provide a battery cover assembly and a secondary battery to alleviate the technical problems of complex structure and high cost of current battery cover systems.
[0005] This utility model provides a battery cover assembly, including a battery cover body, wherein a first protrusion is provided on the upper surface of the battery cover body, and the first protrusion forms a first electrode post;
[0006] At least one second protrusion is provided on the lower end surface of the battery cover body, and the second protrusion is used to connect with the first electrode tab.
[0007] In an optional embodiment, a second groove corresponding to the second protrusion is provided on the upper surface of the battery cover body.
[0008] In an optional embodiment, a first groove corresponding to the first protrusion is provided on the lower end surface of the battery cover body.
[0009] In an optional embodiment, a lower plastic sheet is also included, wherein the lower plastic sheet has a first perforation corresponding to the second protrusion.
[0010] In an optional embodiment, a retaining ring is provided on the upper end surface of the lower plastic, and the retaining ring is inserted into the first groove.
[0011] In an optional embodiment, the battery cover body is provided with a first mounting hole, and a second terminal post is assembled in the first mounting hole.
[0012] The battery cover assembly provided by this utility model has a first protrusion on the main body of the battery panel forming a first electrode post, and a second protrusion for connecting with a first electrode tab. Compared with the prior art, the battery cover body has fewer assembly holes, reducing the difficulty of sealing the battery cover assembly. Moreover, the structure is simpler, reducing costs and the risk of leakage.
[0013] This utility model provides a secondary battery, including a battery casing and a battery cover assembly as described in any of the foregoing embodiments.
[0014] In an optional embodiment, an electrode assembly is also included, which is assembled within the battery casing;
[0015] The upper end of the battery casing has an upper opening, and the battery cover assembly is assembled at the upper opening of the battery casing and forms a closed space within the cavity of the battery casing.
[0016] The electrode assembly has a first tab and a second tab. The first tab is connected to a second protrusion, and the second tab is connected to a second post on the battery cover body via a first adapter piece.
[0017] In an optional embodiment, the electrode assembly includes at least one cell, each cell having a positive electrode tab, and one or more positive electrode tabs connected in parallel to form a first electrode tab; each first electrode tab is connected to a second protrusion.
[0018] In an optional embodiment, the electrode assembly includes two cells, with the positive electrode tab of each cell forming a first electrode tab.
[0019] Compared with the prior art, the secondary 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
[0020] 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.
[0021] Figure 1 This is a schematic diagram of the structure of the battery cover assembly provided in an embodiment of the present utility model;
[0022] Figure 2 for Figure 1 A schematic diagram of the longitudinal section of the battery cover body of the battery cover assembly shown.
[0023] Figure 3 for Figure 1 An exploded view of the battery cover assembly shown.
[0024] Figure 4 A schematic diagram of the electrode assembly of a secondary battery provided in an embodiment of this utility model.
[0025] Icons: 100 - Battery cover body; 200 - First protrusion; 300 - Second terminal post; 400 - Second groove; 500 - Second protrusion; 600 - First groove; 700 - Positive electrode contoured PPS; 800 - First perforation; 900 - Retaining ring; 110 - Battery cell; 120 - First tab; 130 - Lower plastic; 140 - Second tab; 150 - First adapter piece. Detailed Implementation
[0026] 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.
[0027] 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.
[0028] 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.
[0029] 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.
[0030] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.
[0031] Example
[0032] Reference Figures 1-4 This utility model provides a battery cover assembly, including a battery cover body 100, wherein a first protrusion 200 is provided on the upper surface of the battery cover body 100, and the first protrusion 200 forms a first pole post.
[0033] At least one second protrusion 500 is provided on the lower end surface of the battery cover body 100, and the second protrusion 500 is used to connect with the first electrode tab 120.
[0034] In some embodiments, the first protrusion 200 of the battery cover body 100 protrudes upward and forms a first electrode post, which facilitates the parallel or series connection of secondary batteries; the second protrusion 500 of the battery cover body 100 protrudes downward, and the first electrode tab 120 of the electrode assembly is connected to the second protrusion 500 by ultrasonic welding; compared with the prior art, the connection between the electrode tab and the electrode post by the adapter plate simplifies the structure and eliminates the need to pass the electrode post through the battery cover body 100, thereby reducing the sealing difficulty of the battery cover body 100.
[0035] Reference Figure 2 In an optional embodiment, a second groove 400 corresponding to the second protrusion 500 is provided on the upper surface of the battery cover body 100.
[0036] In an optional embodiment, a first groove 600 corresponding to the first protrusion 200 is provided on the lower end surface of the battery cover body 100.
[0037] In some embodiments, the battery cover body 100 is provided with a second groove 400 corresponding to the second protrusion 500 and a first groove 600 corresponding to the first protrusion 200; wherein the first protrusion 200 and the second protrusion 500 can be formed by impacting the battery cover body 100, that is, the first groove 600 is formed on one side of the battery cover body 100 and the first protrusion 200 is formed on the other side, the second groove 400 is formed on one side of the battery cover body 100 and the second protrusion 500 is formed on the other side.
[0038] Reference Figure 3 In an optional embodiment, it further includes a lower plastic 130, on which a first perforation 800 corresponding to the second protrusion 500 is provided.
[0039] In an optional embodiment, a retaining ring 900 is provided on the upper end surface of the lower plastic 130, and the retaining ring 900 is inserted into the first groove 600.
[0040] In an optional embodiment, the battery cover body 100 is provided with a first mounting hole, and a second pole post 300 is assembled in the first mounting hole.
[0041] A lower plastic 130 is provided at the lower end of the battery cover body 100. The lower plastic 130 has a first through hole 800 and a second protrusion 500 that can be inserted into the first through hole 800, so as not to affect the connection between the first tab 120 of the electrode assembly and the second protrusion 500.
[0042] In order to better assemble the lower plastic 130 with the battery cover body 100, a retaining ring 900 is provided at the upper end of the lower plastic 130. The retaining ring 900 can be inserted into the first groove 600, thus achieving better assembly of the lower plastic 130 and the battery cover body 100.
[0043] The second terminal 300 is the negative terminal. The second terminal 300 is inserted into the first through hole 800 of the lower plastic 130 from one side of the lower end face and is assembled into the first mounting hole of the battery cover body 100, thereby realizing the connection between the second terminal 300 and the battery cover body 100.
[0044] An explosion-proof valve and a liquid injection hole are also provided on the battery cover body 100; a negative electrode PPS is provided on the second electrode post 300, and a positive electrode conformal PPS 700 is provided on the first electrode post; thus, the appearance of the positive electrode post and the negative electrode post of the battery cover body 100 is similar to that of the positive electrode post and the negative electrode post in the prior art.
[0045] The battery cover assembly provided by this utility model has a first protrusion 200 forming a first electrode post on the battery panel body, and a second protrusion 500 for connecting with the first electrode tab 120. Compared with the prior art, the battery cover body 100 has fewer mounting holes, which reduces the difficulty of sealing the battery cover assembly. Moreover, the structure is simpler, the cost is reduced, and the risk of leakage is reduced.
[0046] Reference Figure 4 This utility model provides a secondary battery, including a battery casing and a battery cover assembly as described in any of the foregoing embodiments.
[0047] In an optional embodiment, an electrode assembly is also included, which is assembled within the battery casing;
[0048] The upper end of the battery casing has an upper opening, and the battery cover assembly is assembled at the upper opening of the battery casing and forms a closed space within the cavity of the battery casing.
[0049] The electrode assembly has a first tab 120 and a second tab 140. The first tab 120 is connected to a second protrusion 500, and the second tab 140 is connected to a second terminal post 300 on the battery cover body 100 via a first adapter piece 150.
[0050] In an optional embodiment, the electrode assembly includes at least one cell 110, each cell 110 having a positive electrode tab, and one or more positive electrode tabs connected in parallel to form a first electrode tab 120; each first electrode tab 120 is connected to a second protrusion 500.
[0051] In an optional embodiment, the electrode assembly includes two cells 110, with the positive electrode tab of each cell 110 forming a first tab 120.
[0052] In some embodiments, the electrode assembly includes a plurality of cells 110, and generally the electrode assembly includes two cells 110, each of which has a positive electrode tab and a negative electrode tab.
[0053] When the battery cover body 100 is provided with two second protrusions 500, the positive electrode tab of each cell 110 is connected to one second protrusion 500; when the battery cover body 100 is provided with only one second protrusion 500, the positive electrode tabs of two cells 110 are connected in parallel to the same second protrusion 500.
[0054] The negative electrode tabs of the battery cell 110 are connected in parallel to form a second electrode tab 140. The second electrode tab 140 is connected to the second electrode post 300 of the battery cover body 100 through the first adapter piece 150. The connection method between the second electrode post 300 of the battery cover body 100 and the electrode assembly is the prior art.
[0055] Compared with the prior art, the secondary 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.
[0056] 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 assembly, characterized in that, Includes a battery cover body (100), and a first protrusion (200) is provided on the upper surface of the battery cover body (100), the first protrusion (200) forming a first pole post; At least one second protrusion (500) is provided on the lower end surface of the battery cover body (100), and the second protrusion (500) is used to connect with the first electrode tab (120).
2. The battery cover assembly according to claim 1, characterized in that, The upper surface of the battery cover body (100) is provided with a second groove (400) corresponding to the second protrusion (500).
3. The battery cover assembly according to claim 1, characterized in that, The lower end surface of the battery cover body (100) is provided with a first groove (600) corresponding to the first protrusion (200).
4. The battery cover assembly according to claim 3, characterized in that, It also includes a lower plastic (130), on which a first perforation (800) is provided corresponding to the second protrusion (500).
5. The battery cover assembly according to claim 4, characterized in that, A fixing ring (900) is provided on the upper end surface of the lower plastic (130), and the fixing ring (900) is inserted into the first groove (600).
6. The battery cover assembly according to claim 1, characterized in that, The battery cover body (100) is provided with a first mounting hole, and a second pole post (300) is assembled in the first mounting hole.
7. A secondary battery, characterized in that, Includes the battery casing and the battery cover assembly as described in any one of claims 1-6.
8. The secondary battery according to claim 7, characterized in that, It also includes an electrode assembly, which is assembled inside the battery casing; The upper end of the battery casing has an upper opening, and the battery cover assembly is assembled at the upper opening of the battery casing and forms a closed space within the cavity of the battery casing. The electrode assembly has a first tab (120) and a second tab (140), the first tab (120) being connected to a second protrusion (500), and the second tab (140) being connected to a second terminal post (300) on the battery cover body (100) via a first adapter piece (150).
9. The secondary battery according to claim 8, characterized in that, The electrode assembly includes at least one cell (110), each cell (110) having a positive electrode tab, and one or more positive electrode tabs connected in parallel to form a first electrode tab (120); each first electrode tab (120) is connected to a second protrusion (500).
10. The secondary battery according to claim 9, characterized in that, The electrode assembly includes two cells (110), and the positive electrode tab of each cell (110) forms a first electrode tab (120).