A pole ear structure, soft pack battery and electrical equipment
By designing the packaging section of the through-hole in the extreme ear structure and the extreme ear glue covering the through-hole, the problem of layering the extreme ear glue and the extreme ear main body is solved, and a more stable battery packaging is achieved.
Patent Information
- Application Number
- CN202323602644.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2033-12-27
AI Technical Summary
During the packaging process of lithium-ion batteries, the electrode glue and the electrode body are easily delaminated, resulting in poor packaging.
An extreme ear structure is designed, wherein the extreme ear body includes a packaging section, and the packaging section is opened with a through hole, and the extreme ear glue is arranged on both sides of the extreme ear body, and at least part of the extreme ear glue covers the through hole. During hot-press packaging, the electrode glue and aluminum-plastic film are welded and welded with each other through the through holes, reducing the area where the electrode body is heat-sealed.
It reduces the chance of layering of the extreme ear glue and the extreme ear body, ensures the packaging quality, and improves the packaging stability of the battery.
Smart Images
Figure CN222705770U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a pole ear structure, a soft-pack battery and electrical equipment. Background Art
[0002] In lithium-ion batteries, according to the different packaging materials, they are mainly divided into soft-pack batteries and hard-shell batteries. Compared with hard-shell batteries, soft-pack batteries have the advantages of good safety, light weight, high energy density, good electrochemical performance, long life, and strong customization.
[0003] The soft-pack battery uses an aluminum-plastic film to cover the battery cell, and then forms a soft-pack battery through sealing. The tab is generally composed of a tab body and tab glue arranged on both sides of the tab body. The tab glue mainly plays an insulating role, preventing a short circuit between the tab metal strip and the aluminum-plastic film during battery packaging.
[0004] In the related art, the tabs are packaged by heat sealing and hot-melt sealing with aluminum-plastic film. Such packaging may cause the tab body and the tab glue to be delaminated, resulting in poor packaging.
[0005] Therefore, it is necessary to provide a tab structure, a soft-pack battery and an electrical device to solve the above problems. Utility Model Content
[0006] The utility model aims to provide a tab structure, a soft-pack battery and an electrical device, which reduce the probability of tab glue and tab body being delaminated and ensure the packaging quality.
[0007] To achieve this purpose, the utility model adopts the following technical solutions:
[0008] A tab structure, comprising:
[0009] A tab body, the tab body comprising a packaging section, the packaging section being provided with a through hole;
[0010] The tab glue is arranged on both sides of the tab body, and at least a portion of the tab glue covers the through hole.
[0011] Preferably, the tab glue covers the packaging section.
[0012] Preferably, the tab body comprises a single-layer metal sheet or a metal sheet with a coating on the surface.
[0013] Preferably, the tab body comprises an aluminum sheet, a nickel sheet or a copper sheet with a nickel coating.
[0014] Preferably, the through hole is a square hole.
[0015] Preferably, the tab body further includes an external connecting segment and an internal connecting segment, and the external connecting segment, the packaging segment and the internal connecting segment are arranged sequentially along the first direction.
[0016] Preferably, the outer connecting section, the encapsulation section and the inner connecting section are an integral structure.
[0017] A soft-pack battery comprises a battery cell and a packaging body covering the battery cell, wherein the packaging body has a hot-pressing packaging area and also comprises the above-mentioned tab structure, wherein the packaging segment of the tab structure is hot-pressed and packaged in the hot-pressing packaging area, and the portion of the tab glue covering the through hole is welded to the packaging body.
[0018] An electrical device comprises the above-mentioned soft-pack battery.
[0019] Beneficial effects:
[0020] The tab structure provided in this embodiment includes a tab body and a tab glue, wherein the tab body includes a packaging section, the packaging section is provided with a through hole, the tab glue is arranged on both sides of the tab body, and at least part of the tab glue covers the packaging section. During hot pressing packaging, the tab glue covering both sides of the packaging section will be respectively welded with the aluminum-plastic film, and since the packaging section is provided with a through hole, the tab glue covering both sides of the through hole region of the packaging section will be mutually welded under the hot pressing action of the sealing head, that is, at this time, one side of the tab glue covering the through hole region is welded with the aluminum-plastic film, and the other side is welded with the tab glue located on the other side of the tab body, and only the tab body of the portion other than the through hole of the packaging section is heat-sealed, and compared with the traditional tab structure, the area of the tab body being heat-sealed is reduced, that is, the probability of the tab glue and the tab body being delaminated is reduced, and the packaging quality is ensured. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the tab body provided by the utility model;
[0022] Figure 2 It is a schematic diagram of the pole ear structure provided by the utility model;
[0023] Figure 3 It is a schematic diagram of the head provided by the utility model.
[0024] In the figure:
[0025] 1. Tab body; 11. External connection section; 12. Packaging section; 121. Through hole; 13. Internal connection section;
[0026] 2. Ear glue;
[0027] 3. Head sealing. DETAILED DESCRIPTION
[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0031] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0032] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.
[0033] Soft-pack batteries use aluminum-plastic film to cover the battery cell, and then form a soft-pack battery through sealing. The tabs are generally composed of a tab body and tab glue arranged on both sides of the tab body. The tab glue mainly plays an insulating role, preventing short circuits between the tab metal strip and the aluminum-plastic film during battery packaging, and is heat-sealed and hot-melt-sealed with the aluminum-plastic film during packaging. However, such packaging may cause the tab body and the tab glue to delaminate, resulting in poor packaging.
[0034] In order to solve the above problems, Figure 1 , Figure 2 As shown, this embodiment provides a tab structure, including a tab body 1 and a tab glue 2, the tab body 1 includes a packaging section 12, the packaging section 12 is provided with a through hole 121, the tab glue 2 is arranged on both sides of the tab body 1, and at least part of the tab glue 2 covers the packaging section 12. During hot pressing packaging, the tab glue 2 covering both sides of the packaging section 12 will be respectively welded with the aluminum-plastic film, and since the packaging section is provided with a through hole 121, the tab glue covering both sides of the through hole 121 region on the packaging section 12 will be mutually welded under the action of hot pressing, that is, at this time, one side of the tab glue 2 covering the through hole 12 region is welded with the aluminum-plastic film, and the other side is welded with the tab glue 2 located on the other side of the tab body, and only the tab body 1 of the packaging section 12 other than the through hole 121 is heat-sealed, and compared with the traditional tab structure, the area of the tab body 1 being heat-sealed is reduced, that is, the probability of the tab glue 2 and the tab body 1 being delaminated is reduced, and the packaging quality is guaranteed.
[0035] The tab glue 2 is bonded to the tab body 1 . Specifically, the tab glue 2 covers the packaging section 12 . That is, during packaging, the tab body 1 will not come into contact with the aluminum-plastic film to prevent a short circuit.
[0036] The tab glue 2 may be made of hot melt adhesive material, such as but not limited to polypropylene, chlorinated polypropylene, etc. That is, a polypropylene layer or a chlorinated polypropylene layer is disposed on both sides of the packaging section 12 of the tab body 1, or a polypropylene layer or a chlorinated polypropylene layer is disposed around the packaging section 12 of the tab body 1.
[0037] The through hole 121 can be of any geometric shape. Figure 1 The through hole 121 is a square hole. Correspondingly, the protrusion arranged on the head is also square. The square hole is easy to process and is adapted to the shape of the tab body 1.
[0038] Continue reading Figure 1 The tab body 1 further includes an outer connecting section 11 and an inner connecting section 13. The outer connecting section 11, the packaging section 12 and the inner connecting section 13 are sequentially arranged along a first direction. Figure 1 As shown, it is the length direction of the tab body 1. The tab structure is used as a medium for connecting the battery cell of the soft-pack battery to the outside world. The inner connection section 13 of the tab body 1 is used to connect to the electrode corresponding to the battery cell; the outer connection section 11 is used to connect to an external electrical device so that the soft-pack battery can provide electrical energy to the electrical device, or to connect to an external charging device so that the charging device can charge the soft-pack battery.
[0039] The outer connecting section 11, the packaging section 12 and the inner connecting section 13 are an integrated structure. For example, but not limited to, the tab body 1 can be formed by stamping or shearing a metal sheet, a metal strip, etc., so that the outer connecting section 11, the packaging section 12 and the inner connecting section 13 of the tab body 1 are an integrated structure of the same metal sheet.
[0040] Figure 1 In the figure, the tab body 1 is virtually divided into three parts: an outer connecting section 11 , a packaging section 12 and an inner connecting section 13 by dotted lines.
[0041] The above-mentioned metal sheets, metal strips, etc. can be single-layer metal sheets, metal strips, or metal sheets, metal strips with a coating on the surface. Accordingly, the tab body 1 prepared therefrom includes a single-layer metal sheet or a metal sheet with a coating on the surface.
[0042] In addition, for the structure in which the tab body 1 is a metal sheet with a coating on the surface, it is also possible to first punch or shear an uncoated metal sheet or metal strip to prepare the uncoated tab body 1, and then electroplate the uncoated tab body 1 to form a metal coating on its surface.
[0043] In order to make the tab body 1 and the tab glue 2 have better bonding ability and further prevent the tab body 1 and the tab glue 2 from being delaminated, the tab body 1 includes an aluminum sheet, a nickel sheet or a copper sheet with a nickel coating.
[0044] The present embodiment provides a soft-pack battery, including a battery cell and a packaging body covering the battery cell, the packaging body having a hot pressing packaging area, and also including the above-mentioned pole ear structure, the packaging segment 12 of the pole ear structure is hot pressed and packaged in the hot pressing packaging area, and the portion of the pole ear glue 2 covering the through hole 121 is fused to the packaging body, wherein the internal connection segment 13 is located in the packaging body and is electrically connected to the corresponding electrode of the battery cell, and the external connection segment 11 is located outside the packaging body.
[0045] It should be noted that the packaging body is, for example but not limited to, an aluminum-plastic film.
[0046] This embodiment provides an electrical device, including the above-mentioned battery module.
[0047] Accordingly, see Figure 3 This embodiment also provides a packaging mechanism, including a sealing head 3, a packaging area of the sealing head 3 is provided with a protrusion 31, and the protrusion 31 corresponds to the through hole 121 of the tab structure. This packaging mechanism can be applied to the packaging of the tab structure and can meet the special packaging requirements of the tab structure.
[0048] It can be understood that in order to ensure smooth packaging, the shape and size of the protrusion 31 are the same as those of the through hole 121. During hot pressing, the head 3 is pressed against the aluminum-plastic film. At this time, the aluminum-plastic film covering the packaging section 12 of the pole ear structure is welded to the pole ear glue 2, and the protrusion 31 is opposite to the through hole, so as to hot press the aluminum-plastic film and the pole ear glue 2 covering the through hole 121 area, so that one side of the pole ear glue 2 covering the through hole 12 area is welded to the aluminum-plastic film, and the other side is welded to the pole ear glue 2 located on the other side of the pole ear body.
[0049] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A tab structure, characterized in that: include: A tab body (1), the tab body (1) comprising a packaging section (12), the packaging section (12) being provided with a through hole (121); Tab glue (2), the tab glue (2) is arranged on both sides of the tab body (1), and at least a portion of the tab glue (2) covers the packaging section (12).
2. The tab structure according to claim 1, characterized in that: The tab glue (2) covers the packaging section (12).
3. The tab structure according to claim 1, characterized in that: The tab body (1) comprises a single-layer metal sheet or a metal sheet with a coating on the surface.
4. The tab structure according to claim 1, characterized in that: The tab body (1) comprises an aluminum sheet, a nickel sheet or a copper sheet with a nickel coating.
5. The tab structure according to any one of claims 1 to 4, characterized in that: The through hole (121) is a square hole.
6. The tab structure according to any one of claims 1 to 4, characterized in that: The tab body (1) further comprises an external connecting segment (11) and an internal connecting segment (13), wherein the external connecting segment (11), the packaging segment (12) and the internal connecting segment (13) are arranged in sequence along a first direction.
7. The tab structure according to claim 6, characterized in that: The outer connecting section (11), the encapsulating section (12) and the inner connecting section (13) are an integral structure.
8. A soft pack battery, characterized in that: It comprises a battery cell and a package covering the battery cell, wherein the package has a hot pressing packaging area, and further comprises the pole ear structure according to any one of claims 1 to 4, wherein the packaging segment (12) of the pole ear structure is hot pressed and packaged in the hot pressing packaging area, and a portion of the pole ear glue (2) covering the through hole (121) is fused to the package.
9. An electrical device, characterized in that: Comprising the soft-pack battery as described in claim 8.