Uncharged large cylindrical cell structure with same-side tabs

Abstract

The utility model provides a shell does not take big cylindrical homolateral tab battery structure of ear, including shell, volume core and cover plate subassembly, shell one end opening, the other end is equipped with the liquid injection hole, volume core installs shell in, be equipped with the insulating film between volume core and shell, cover plate subassembly installs to the open end of shell, realize electric connection between cover plate subassembly and volume core, the liquid injection hole is equipped with sealing nail, realizes the sealing, the utility model discloses guarantee the safety of battery at the same time, makes the liquid injection hole position in the center, improves battery performance, improves production efficiency, reduces the equipment investment of assembly.

Description

Technical Field

[0001] This utility model belongs to the field of cylindrical batteries, and in particular relates to a large cylindrical grooved battery structure with a non-charged casing. Background Technology

[0002] Existing cylindrical batteries, when implementing casing insulation design, cannot simultaneously meet the requirements of casing potential isolation and symmetrical arrangement of the injection holes due to the coupling limitation between the electrode arrangement and the position of the injection holes. The injection holes are forced to deviate from the geometric center, resulting in asymmetrical wetting during electrolyte filling, affecting the uniformity of electrode interface formation, and leading to a reduction in battery cycle life. Existing casing charging solutions have a high probability of triggering thermal runaway in UL 1642 nail penetration tests because the casing is directly connected to the active material.

[0003] The offset injection hole design requires a dedicated positioning mold, increasing mold development costs and reducing material utilization due to the asymmetrical structure. Additionally, a visual positioning system is needed for calculations, increasing the depreciation cost per battery cell. Utility Model Content

[0004] In view of this, the present invention aims to propose a battery structure with a large cylindrical shell without charged electrodes on the same side, which ensures battery safety while placing the liquid injection hole in the center, thereby improving battery performance, increasing production efficiency, and reducing the investment in assembly equipment.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A battery structure with a non-charged large cylindrical casing and a tab on the same side, including a casing, a core, and a cover plate assembly;

[0007] The housing is open at one end and has a liquid injection hole at the other end; the core is installed in the housing, and an insulating film is provided between the core and the housing;

[0008] The cover plate assembly is installed at the open end of the housing; the first and second cover plate assemblies of the cover plate assembly are electrically connected to the core; the injection hole is provided with a sealing pin to achieve a seal.

[0009] Furthermore, the cover plate assembly includes a first cover plate assembly and a second cover plate assembly;

[0010] The first cover plate assembly includes a first cover plate body, and two first cover plate assemblies A and B with identical structures.

[0011] The first cover plate body is provided with symmetrical through holes A and through holes B. The first cover plate assembly A is installed to through hole A, and the first cover plate assembly B is installed to through hole B.

[0012] The first cover plate assembly A includes a first sealing sheet A, a first sealing ring A, and a first riveting block A; the first riveting block A is installed to the through hole A via the first sealing ring A;

[0013] By riveting the top of the first riveting block A, a fixed connection can be achieved between the first riveting block A, the first sealing ring A, and the first cover plate body.

[0014] The top of the first rivet block A forms a first mounting groove A, and the first sealing piece A is welded to the first mounting groove A to achieve a seal;

[0015] The first terminal of the winding core is welded to the first riveting block A;

[0016] The first cover plate body is welded to the shell.

[0017] Furthermore, the first sealing ring A has a U-shaped cross-section with an annular groove on the outer side. The annular groove engages with the through hole A to cover the edge of the through hole A.

[0018] The outer cross section of the first riveted block A, after riveting, is also U-shaped, thus covering the first sealing ring A.

[0019] Furthermore, the way the first cover plate assembly B and the through hole B are matched is the same as the way the first cover plate assembly A and the through hole A are matched.

[0020] Furthermore, the second cover plate assembly includes a second cover plate body, a second cover plate assembly A with the same structure, and a second cover plate assembly B.

[0021] The second cover plate body is provided with symmetrical through holes A and through holes B. The second cover plate assembly A is installed to through hole A, and the second cover plate assembly B is installed to through hole B.

[0022] The second cover plate assembly A includes a second sealing sheet A, a second sealing ring A, a second riveting block A, and a second manifold A; the second riveting block A is installed to the through hole A via the second sealing ring A;

[0023] By pressing and riveting the top of the second rivet block A, a fixed connection can be achieved between the second rivet block A, the second sealing ring A, and the second cover plate body.

[0024] The top of the second rivet block A forms a second mounting groove A, and the second sealing piece A is welded to the second mounting groove A to achieve a seal;

[0025] The second busbar A is positioned between the first electrode lug and the second riveting block A, and is welded to both of them respectively;

[0026] The second cover plate body is welded to the shell.

[0027] Furthermore, the second sealing ring A has a spoon-shaped cross-section, with an annular groove formed on the lower outer side. The annular groove engages with the through hole A to cover the edge of the through hole A.

[0028] The upper inner side of the second sealing ring A forms a stepped structure; the outer cross section of the second riveting block A after riveting is also a U-shaped structure, which realizes the pressing of the stepped structure and the covering of the second sealing ring A.

[0029] Furthermore, the way the second cover plate assembly B and the through hole B are matched is the same as the way the second cover plate assembly A and the through hole A are matched.

[0030] Compared with the prior art, the battery structure of the non-charged large cylindrical shell with the same-side output tab described in this utility model has the following advantages:

[0031] (1) The battery structure of the same side tab of the large cylindrical shell without electric charge described in this utility model has a non-electric shell, which reduces the probability of the battery overheating and running out of control when it encounters external impacts such as puncture or bump, reduces the probability of external short circuit during use, and improves safety.

[0032] (2) The battery structure of the non-charged large cylindrical shell with the same side tab of the present invention has a liquid injection hole set in the center, which makes the liquid injection process more uniform and is conducive to the wetting of the battery electrode, making the electrode interface more uniform and improving the battery cycle life; and the liquid injection hole set in the center improves production efficiency and reduces the investment in assembly equipment. Attached Figure Description

[0033] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0034] Figure 1 This is a schematic diagram of the battery structure with a non-charged large cylindrical shell and a tab on the same side, as described in an embodiment of this utility model. Figure 1 ;

[0035] Figure 2 This is an enlarged schematic diagram of the first cover plate assembly described in an embodiment of the present utility model;

[0036] Figure 3 This is a schematic diagram of the battery structure with a non-charged large cylindrical shell and a tab on the same side, as described in an embodiment of this utility model. Figure 2 ;

[0037] Figure 4 This is an enlarged schematic diagram of the second cover plate assembly described in an embodiment of the present utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Housing; 2. Core; 31. First cover plate assembly; 311. First cover plate body; 312. First cover plate assembly A; 3121. First sealing sheet A; 3122. First sealing ring A; 3123. First riveting block A; 313. First cover plate assembly B; 32. Second cover plate assembly; 321. Second cover plate body; 322. Second cover plate assembly A; 3221. Second sealing sheet A; 3222. Second sealing ring A; 3223. Second riveting block A; 3224. Second manifold A; 323. Second cover plate assembly B; 4. Insulating film; 5. Sealing nail. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] The battery structure with a large, uncharged cylindrical casing on the same side and a terminal tab, such as... Figures 1-4 As shown, it includes a housing 1, a core 2, and a cover plate assembly;

[0045] The housing 1 is open at one end and has a liquid injection hole at the other end; the core 2 is installed in the housing 1, and an insulating film 4 is provided between the core 2 and the housing 1;

[0046] The cover plate assembly is installed at the open end of the housing 1; the first cover plate assembly and the second cover plate assembly of the cover plate assembly are electrically connected to the core 2; the injection hole is provided with a sealing nail 5 to achieve sealing.

[0047] Preferably, the cover plate assembly includes a first cover plate assembly 31 and a second cover plate assembly 32;

[0048] The first cover plate assembly 31 includes a first cover plate body 311, a first cover plate assembly 31A, and a first cover plate assembly 31B with the same structure.

[0049] The first cover plate body 311 is provided with symmetrical through holes A and through holes B. The first cover plate assembly 31A is installed to through hole A, and the first cover plate assembly 31B is installed to through hole B.

[0050] The first cover plate assembly 31A includes a first sealing sheet A3121, a first sealing ring A3122, and a first riveting block A3123; the first riveting block A3123 is installed to the through hole A through the first sealing ring A3122;

[0051] By riveting the top of the first riveting block A3123, a fixed connection can be achieved between the first riveting block A3123, the first sealing ring A3122, and the first cover plate body 311.

[0052] The top of the first rivet block A3123 forms a first mounting groove A, and the first sealing piece A3121 is welded to the first mounting groove A to achieve a seal;

[0053] The first terminal of the core 2 is welded to the first riveting block A3123;

[0054] The first cover plate body 311 is welded to the shell 1.

[0055] Preferably, the first sealing ring A3122 has a U-shaped cross-section with an annular groove on the outer side. The annular groove engages with the through hole A to cover the edge of the through hole A.

[0056] The outer cross section of the first riveting block A3123 after riveting is also a U-shaped structure, which covers the first sealing ring A3122.

[0057] Preferably, the way the first cover plate assembly 31B and the through hole B are matched is the same as the way the first cover plate assembly 31A and the through hole A are matched.

[0058] Preferably, the second cover plate assembly 32 includes a second cover plate body 321, a second cover plate assembly 32A and a second cover plate assembly 32B with the same structure;

[0059] The second cover plate body 321 is provided with symmetrical through holes A and through holes B. The second cover plate assembly 32A is installed to through hole A, and the second cover plate assembly 32B is installed to through hole B.

[0060] The second cover plate assembly 32A includes a second sealing sheet A3221, a second sealing ring A3222, a second riveting block A3223, and a second manifold A3224; the second riveting block A3223 is installed to the through hole A through the second sealing ring A3222.

[0061] By pressing and riveting the top of the second riveting block A3223, a fixed connection can be achieved between the second riveting block A3223, the second sealing ring A3222, and the second cover plate body 321.

[0062] The top of the second rivet block A3223 forms a second mounting groove A, and the second sealing piece A3221 is welded to the second mounting groove A to achieve a seal;

[0063] The second busbar A3224 is disposed between the first electrode lug and the second riveting block A3223, and is welded to both of them respectively;

[0064] The second cover plate body 321 is welded to the housing 1.

[0065] Preferably, the cross-section of the second sealing ring A3222 is a spoon-shaped structure, and an annular groove is formed on the lower outer side. The annular groove engages with the through hole A to cover the edge of the through hole A.

[0066] The upper inner side of the second sealing ring A3222 forms a stepped structure; the outer cross section of the second riveting block A3223 after riveting is also a U-shaped structure, which realizes the pressing of the stepped structure and the covering of the second sealing ring A3222.

[0067] Preferably, the way the second cover plate assembly 32B is fitted with the through hole B is the same as the way the second cover plate assembly 32A is fitted with the through hole A.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery structure with a non-charged large cylindrical casing and a tab on the same side, characterized in that: Includes housing, core, and cover plate assemblies; The housing is open at one end and has a liquid injection hole at the other end; the core is installed in the housing, and an insulating film is provided between the core and the housing; The cover plate assembly is installed at the open end of the housing; the first and second cover plate assemblies of the cover plate assembly are electrically connected to the core; the injection hole is provided with a sealing pin to achieve a seal.

2. The battery structure with a non-charged large cylindrical shell and same-side output tab as described in claim 1, characterized in that: The cover plate assembly includes a first cover plate assembly and a second cover plate assembly; The first cover plate assembly includes a first cover plate body, and two first cover plate assemblies A and B with identical structures. The first cover plate body is provided with symmetrical through holes A and through holes B. The first cover plate assembly A is installed to through hole A, and the first cover plate assembly B is installed to through hole B. The first cover plate assembly A includes a first sealing sheet A, a first sealing ring A, and a first riveting block A; the first riveting block A is installed to the through hole A via the first sealing ring A; By riveting the top of the first riveting block A, a fixed connection can be achieved between the first riveting block A, the first sealing ring A, and the first cover plate body. The top of the first rivet block A forms a first mounting groove A, and the first sealing piece A is welded to the first mounting groove A to achieve a seal; The first terminal of the winding core is welded to the first riveting block A; The first cover plate body is welded to the shell.

3. The battery structure with a non-charged large cylindrical shell and same-side output tab as described in claim 2, characterized in that: The first sealing ring A has a U-shaped cross-section with an annular groove on the outer side. The annular groove engages with the through hole A to cover the edge of the through hole A. The outer cross section of the first riveted block A, after riveting, is also U-shaped, thus covering the first sealing ring A.

4. The battery structure with a non-charged large cylindrical shell and same-side output tab as described in claim 2, characterized in that: The way the first cover plate assembly B and the through hole B are matched is the same as the way the first cover plate assembly A and the through hole A are matched.

5. The battery structure with a non-charged large cylindrical shell and same-side output tab as described in claim 2, characterized in that: The second cover plate assembly includes a second cover plate body, a second cover plate assembly A with the same structure, and a second cover plate assembly B. The second cover plate body is provided with symmetrical through holes A and through holes B. The second cover plate assembly A is installed to through hole A, and the second cover plate assembly B is installed to through hole B. The second cover plate assembly A includes a second sealing sheet A, a second sealing ring A, a second riveting block A, and a second manifold A; the second riveting block A is installed to the through hole A via the second sealing ring A; By pressing and riveting the top of the second rivet block A, a fixed connection can be achieved between the second rivet block A, the second sealing ring A, and the second cover plate body. The top of the second rivet block A forms a second mounting groove A, and the second sealing piece A is welded to the second mounting groove A to achieve a seal; The second busbar A is positioned between the first electrode lug and the second riveting block A, and is welded to both of them respectively; The second cover plate body is welded to the shell.

6. The battery structure with a non-charged large cylindrical shell and same-side output tab as described in claim 5, characterized in that: The second sealing ring A has a spoon-shaped cross-section, with an annular groove formed on the lower outer side. The annular groove engages with the through hole A to cover the edge of the through hole A. The upper inner side of the second sealing ring A forms a stepped structure; the outer cross section of the second riveting block A after riveting is also a U-shaped structure, which realizes the pressing of the stepped structure and the covering of the second sealing ring A.

7. The battery structure with a non-charged large cylindrical shell and same-side output tab as described in claim 6, characterized in that: The way the second cover plate assembly B and the through hole B are matched is the same as the way the second cover plate assembly A and the through hole A are matched.

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