CN215869705U - Tab structure and button cell - Google Patents
Tab structure and button cell Download PDFInfo
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- CN215869705U CN215869705U CN202121728900.XU CN202121728900U CN215869705U CN 215869705 U CN215869705 U CN 215869705U CN 202121728900 U CN202121728900 U CN 202121728900U CN 215869705 U CN215869705 U CN 215869705U
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Abstract
The application provides a utmost point ear structure and button cell. The tab structure comprises a tab body and a tab glue layer, wherein the tab body comprises a heat sealing part and a conductive leading-out part which are connected. The pole lug glue film is coated on the heat-seal part, the pole lug glue film part extends to the end part of the conductive leading-out part adjacent to the heat-seal part, the heat-seal part is used for being connected with the packaging film shell in a heat-seal mode through the pole lug glue film, the pole lug glue film is at least provided with a corner notch at the position of the conductive leading-out part in the coating mode, and a distance exists between the inner wall of the corner notch and the conductive leading-out part. Because the tab glue layer is provided with the corner gap at least at the part coated on the conductive leading-out part, the area of the insulating glue exposed out of the outer surface of the packaging film is smaller, which is beneficial to reducing the assembly difficulty of the button cell, and because the distance exists between the inner wall of the corner gap and the conductive leading-out part, the tab glue layer provided with the corner gap reliably coats the heat sealing part, so that the end part of the conductive leading-out part, which is adjacent to the heat sealing part, is reliably insulated from the packaging film.
Description
Technical Field
The utility model relates to the field of application names, in particular to a tab structure and a button cell.
Background
The tab structure of the button cell is led out from a winding core at the inner side of the cell to the outer side of the cell, and the tab structure needs to be bent in the packaging process, so as to avoid the problem that the tab structure is in direct contact with a packaging film in the heat sealing process and is conductive to short circuit, the tab structure is wrapped and packaged in the contact area of the two packaging films through insulating glue, the insulating glue part extends out of the outer side of the packaging film, the area of the insulating glue exposed on the outer surface of the packaging film is large, and the button cell is higher in assembly difficulty.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a tab structure and a button cell for solving the technical problems.
The purpose of the utility model is realized by the following technical scheme:
a tab structure, comprising:
the tab body comprises a heat sealing part and a conductive leading-out part which are connected;
the tab glue layer, the tab glue layer cladding in heat-seal portion, just tab glue layer part extends to electrically conductive extraction portion is neighbouring the tip of heat-seal portion, heat-seal portion is used for passing through tab glue layer and encapsulation membrane shell heat-seal connection, the tab glue layer at least in the cladding in the corner breach has been seted up at the position of electrically conductive extraction portion, the inner wall of corner breach with there is the distance between the electrically conductive extraction portion.
In one embodiment, the number of the corner notches is two, and the two corner notches are positioned at two sides of the conductive leading-out part.
In one embodiment, the projection outlines of the two corner notches on the plane where the conductive leading-out part is located are symmetrical about the central line of the conductive leading-out part.
In one embodiment, the corner gap is further opened at a position where the tab adhesive layer is wrapped on the heat sealing part.
In one embodiment, the corner notches are arc notches.
In one embodiment, the corner notch is a circular arc notch.
In one embodiment, the corner notch is a right angle notch.
A button cell comprising the tab structure of any of the above embodiments.
In one embodiment, the button cell further comprises a packaging film shell and a winding core, wherein a packaging inner cavity is formed in the packaging film shell, the winding core is positioned in the packaging inner cavity, the tab body further comprises a conductive connecting part, the conductive connecting part is connected to the end part, far away from the conductive leading-out part, of the heat sealing part, and the conductive connecting part is positioned in the packaging inner cavity and connected with the winding core;
the heat-seal part is located the heat-seal district of encapsulation membrane shell, just the heat-seal portion passes through utmost point ear glue film is connected with encapsulation membrane shell heat-seal, electrically conductive draw forth the position in the periphery of encapsulation membrane shell.
In one embodiment, the tab structure further includes an insulating adhesive layer attached to the connecting portion, and the insulating adhesive layer extends to and is connected with the tab adhesive layer.
Compared with the prior art, the utility model has at least the following advantages:
1. because the heat-sealing part is connected with the conductive leading-out part, the tab glue layer is coated on the heat-sealing part, and the tab glue layer partially extends to the end part of the conductive leading-out part adjacent to the heat-sealing part, so that the end part of the conductive leading-out part adjacent to the heat-sealing part and the heat-sealing part are both coated with the tab glue layer, and the situation of short circuit caused by the direct contact of the heat-sealing part and the conductive leading-out part with the packaging film shell is avoided, and further the tab structure and the packaging film shell are reliably heat-sealed, meanwhile, the practicability of the soft packaging lithium ion battery is increased, the use is convenient, and thus, the button battery has better use convenience and practicability;
2. because the tab glue layer is provided with the corner gap at least at the part coated on the conductive leading-out part, the area of the insulating glue exposed out of the outer surface of the packaging film is smaller, which is beneficial to reducing the assembly difficulty of the button cell, and because the distance exists between the inner wall of the corner gap and the conductive leading-out part, the tab glue layer provided with the corner gap reliably coats the heat sealing part, so that the end part of the conductive leading-out part, which is adjacent to the heat sealing part, is reliably insulated from the packaging film.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a tab structure leading out of a package film shell and a core in an embodiment;
FIG. 2 is a schematic structural diagram of a tab structure and an encapsulating film casing before heat sealing in one embodiment;
fig. 3 is a schematic structural diagram of a button cell according to an embodiment.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The application provides a utmost point ear structure, including utmost point ear body and utmost point ear glue film, utmost point ear body is including the heat-seal portion that is connected and the electrically conductive portion of drawing forth. The tab glue layer is coated on the heat-seal part, the tab glue layer part extends to the position where the conductive leading-out part is adjacent to the end part of the heat-seal part, the heat-seal part is used for being connected with the packaging film shell in a heat-seal mode, the tab glue layer is at least coated on the position where the conductive leading-out part is provided with a corner notch, and the inner wall of the corner notch is distant from the conductive leading-out part.
According to the tab structure, the heat-sealing part is connected with the conductive leading-out part, the tab glue layer is coated on the heat-sealing part, and the tab glue layer partially extends to the end part of the conductive leading-out part adjacent to the heat-sealing part, so that the end part of the conductive leading-out part adjacent to the heat-sealing part and the heat-sealing part are both coated with the tab glue layer, the situation that the heat-sealing part and the conductive leading-out part are both in direct contact with the packaging film shell to cause short circuit is avoided, and the tab structure and the packaging film shell are reliably heat-sealed; because the tab glue layer is provided with the corner gap at least at the part coated on the conductive leading-out part, the area of the insulating glue exposed out of the outer surface of the packaging film is smaller, which is beneficial to reducing the assembly difficulty of the button cell, and because the distance exists between the inner wall of the corner gap and the conductive leading-out part, the tab glue layer provided with the corner gap reliably coats the heat sealing part, so that the end part of the conductive leading-out part, which is adjacent to the heat sealing part, is reliably insulated from the packaging film.
In order to better understand the technical scheme and the beneficial effects of the present application, the following detailed description is further provided in conjunction with specific embodiments:
as shown in fig. 1 and 2, the tab structure 10 of one embodiment is used for heat-sealing connection with the encapsulating film case 20. In one embodiment, the tab structure 10 includes a tab body 100 and a tab glue layer 200. Wherein, the tab body 100 includes a heat sealing part 110 and a conductive lead-out part 120 connected thereto. The coating of utmost point ear glue film 200 in heat-seal portion 110, just utmost point ear glue film 200 part extends to electrically conductive extraction portion 120 is close to the tip of heat-seal portion 110, heat-seal portion 110 is used for passing through utmost point ear glue film 200 and encapsulation membrane shell 20 heat-seal connection, utmost point ear glue film 200 at least in the coating in corner breach 210 has been seted up at electrically conductive extraction portion 120's position, the inner wall of corner breach 210 with there is the distance between the electrically conductive extraction portion 120. In the present embodiment, the corner notch 210 is at least formed at the corner portion of the tab adhesive layer 200 adjacent to the conductive lead-out portion 120, so that the area of the tab adhesive layer 200 covering the conductive lead-out portion 120 exposed to the periphery of the package film shell 20 is smaller.
In the tab structure 10, because the heat-seal portion 110 is connected with the conductive leading-out portion 120, the tab adhesive layer 200 is coated on the heat-seal portion 110, and the tab adhesive layer 200 partially extends to the end portion of the conductive leading-out portion 120 adjacent to the heat-seal portion 110, so that the end portion of the conductive leading-out portion 120 adjacent to the heat-seal portion 110 and the heat-seal portion 110 are both coated with the tab adhesive layer 200, thereby avoiding the situation that the heat-seal portion 110 and the conductive leading-out portion 120 are both in direct contact with the packaging film shell 20 to cause short circuit, and further reliably heat-sealing the tab structure 10 and the packaging film shell 20; because the tab adhesive layer 200 is provided with the corner notch 210 at least at the position coated on the conductive leading-out part 120, the area of the insulating adhesive exposed on the outer surface of the packaging film is smaller, which is beneficial to reducing the assembly difficulty of the button cell, and because the distance exists between the inner wall of the corner notch 210 and the conductive leading-out part 120, the tab adhesive layer 200 provided with the corner notch 210 reliably coats the heat sealing part 110, so that the end part of the conductive leading-out part 120, which is adjacent to the heat sealing part 110, is reliably insulated from the packaging film.
As shown in fig. 1 and fig. 2, in one embodiment, the number of the corner notches 210 is two, and the two corner notches 210 are located at two sides of the conductive leading-out portion 120, so that the area of the tab adhesive layer 200 covering the conductive leading-out portion 120 exposed outside the periphery of the packaging film case 20 is smaller, and the assembling difficulty of the button cell is further reduced.
As shown in fig. 1 and fig. 2, in one embodiment, the projection profiles of the two corner notches 210 on the plane where the conductive lead-out portion 120 is located are symmetrical with respect to the center line of the conductive lead-out portion 120, so that the area of the tab adhesive layer 200 covering the conductive lead-out portion 120 exposed on the periphery of the packaging film shell 20 is smaller, and the button cell is better packaged, thereby further reducing the assembly difficulty of the button cell.
As shown in fig. 1 and fig. 2, in one embodiment, the corner notch 210 is further opened at a portion where the tab adhesive layer 200 is wrapped on the heat sealing portion 110, so as to further reduce the area of the tab adhesive layer 200 exposed outside the periphery of the packaging film shell 20, and reduce the processing difficulty of the corner notch 210.
As shown in fig. 1 and fig. 2, in one embodiment, the corner notch 210 is an arc-shaped notch, so as to reduce the area of the tab glue layer 200 exposed to the periphery of the packaging film shell 20, and reduce the stress of the corner notch 210. In one embodiment, the corner notch 210 is a circular arc notch. It is understood that in other embodiments, the corner notches 210 are not limited to circular arc notches. In another embodiment, the corner notch 210 is a right angle notch.
As shown in fig. 1 to 3, the present application further provides a button cell 30 including the tab structure 10 according to any one of the above embodiments. Further, the tab structure 10 includes a tab body 100 and a tab glue layer 200. Wherein, the tab body 100 includes a heat sealing part 110 and a conductive lead-out part 120 connected thereto. The coating of utmost point ear glue film 200 in heat-seal portion 110, just utmost point ear glue film 200 part extends to electrically conductive extraction portion 120 is close to the tip of heat-seal portion 110, heat-seal portion 110 is used for passing through utmost point ear glue film 200 and encapsulation membrane shell 20 heat-seal connection, utmost point ear glue film 200 at least in the coating in corner breach 210 has been seted up at electrically conductive extraction portion 120's position, the inner wall of corner breach 210 with there is the distance between the electrically conductive extraction portion 120. In the present embodiment, the corner notch 210 is at least formed at the corner portion of the tab adhesive layer 200 adjacent to the conductive lead-out portion 120, so that the area of the tab adhesive layer 200 covering the conductive lead-out portion 120 exposed to the periphery of the package film shell 20 is smaller.
In the tab structure 10, because the heat-seal portion 110 is connected with the conductive leading-out portion 120, the tab adhesive layer 200 is coated on the heat-seal portion 110, and the tab adhesive layer 200 partially extends to the end portion of the conductive leading-out portion 120 adjacent to the heat-seal portion 110, so that the end portion of the conductive leading-out portion 120 adjacent to the heat-seal portion 110 and the heat-seal portion 110 are both coated with the tab adhesive layer 200, thereby avoiding the situation that the heat-seal portion 110 and the conductive leading-out portion 120 are both in direct contact with the packaging film shell 20 to cause short circuit, and further reliably heat-sealing the tab structure 10 and the packaging film shell 20; because the tab adhesive layer 200 is provided with the corner notch 210 at least at the position coated on the conductive leading-out part 120, the area of the insulating adhesive exposed on the outer surface of the packaging film is smaller, which is beneficial to reducing the assembly difficulty of the button cell, and because the distance exists between the inner wall of the corner notch 210 and the conductive leading-out part 120, the tab adhesive layer 200 provided with the corner notch 210 reliably coats the heat sealing part 110, so that the end part of the conductive leading-out part 120, which is adjacent to the heat sealing part 110, is reliably insulated from the packaging film.
As shown in fig. 1 and 2, in one embodiment, the button cell further includes a packaging film shell 20 and a winding core 40, wherein a packaging cavity 22 is formed in the packaging film shell 20, and the winding core 40 is located in the packaging cavity. The tab body 100 further comprises a conductive connecting portion 130, the conductive connecting portion 130 is connected to the end portion of the heat sealing portion 110 far away from the conductive leading-out portion 120, and the conductive connecting portion 130 is located in the encapsulation inner cavity and connected to the winding core 40, so that the conductive connecting portion 130 is electrically connected to the winding core 40. Heat-seal portion 110 is located the heat-seal district 22 of encapsulation membrane shell, just heat-seal portion 110 passes through utmost point ear glue film 200 and the 20 heat-seal connections of encapsulation membrane shell, electrically conductive portion 120 of drawing forth is located the periphery of encapsulation membrane shell makes button cell can external electrically conductive.
As shown in fig. 1 and fig. 2, in one embodiment, the tab structure 10 further includes an insulating adhesive layer 300 attached to the conductive connection portion, and the insulating adhesive layer extends to the tab adhesive layer 200 and is connected to the tab adhesive layer 200, so that the problem of short circuit caused by high-temperature adhesive explosion is solved, and the heat sealing reliability of the button cell is improved.
Compared with the prior art, the utility model has at least the following advantages:
1. because the heat-sealing part 110 is connected with the conductive leading-out part 120, the tab adhesive layer 200 is coated on the heat-sealing part 110, and the tab adhesive layer 200 partially extends to the end part of the conductive leading-out part 120 adjacent to the heat-sealing part 110, so that the end part of the conductive leading-out part 120 adjacent to the heat-sealing part 110 and the heat-sealing part 110 are both coated with the tab adhesive layer 200, thereby avoiding the situation that the heat-sealing part 110 and the conductive leading-out part 120 are both in direct contact with the packaging film shell 20 to cause short circuit, and further reliably heat-sealing the tab structure 10 and the packaging film shell 20;
2. because the tab adhesive layer 200 is provided with the corner notch 210 at least at the position coated on the conductive leading-out part 120, the area of the insulating adhesive exposed on the outer surface of the packaging film is smaller, which is beneficial to reducing the assembly difficulty of the button cell, and because the distance exists between the inner wall of the corner notch 210 and the conductive leading-out part 120, the tab adhesive layer 200 provided with the corner notch 210 reliably coats the heat sealing part 110, so that the end part of the conductive leading-out part 120, which is adjacent to the heat sealing part 110, is reliably insulated from the packaging film.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A tab structure, comprising:
the tab body comprises a heat sealing part and a conductive leading-out part which are connected;
the tab glue layer, the tab glue layer cladding in heat-seal portion, just tab glue layer part extends to electrically conductive extraction portion is neighbouring the tip of heat-seal portion, heat-seal portion is used for passing through tab glue layer and encapsulation membrane shell heat-seal connection, the tab glue layer at least in the cladding in the corner breach has been seted up at the position of electrically conductive extraction portion, the inner wall of corner breach with there is the distance between the electrically conductive extraction portion.
2. The tab structure of claim 1, wherein the number of the corner notches is two, and the two corner notches are located at both sides of the conductive lead-out portion.
3. The tab structure of claim 2, wherein the projected profile of the two corner notches in the plane of the conductive lead-out portion is symmetrical about the center line of the conductive lead-out portion.
4. The tab structure as claimed in claim 1, wherein the corner notches are further formed at positions where the tab adhesive layers are wrapped on the heat sealing portions.
5. The tab structure of claim 1, wherein the corner notches are arcuate notches.
6. The tab structure of claim 5, wherein the corner notches are circular arc notches.
7. The tab structure of claim 1, wherein the corner notches are right angle notches.
8. A button cell battery comprising the tab structure of any one of claims 1 to 7.
9. The button cell according to claim 8, further comprising a packaging film shell and a winding core, wherein a packaging inner cavity is formed in the packaging film shell, the winding core is located in the packaging inner cavity, the tab body further comprises a conductive connecting part, the conductive connecting part is connected to the end part of the heat sealing part far away from the conductive leading-out part, and the conductive connecting part is located in the packaging inner cavity and connected with the winding core;
the heat-seal part is located the heat-seal district of encapsulation membrane shell, just the heat-seal portion passes through utmost point ear glue film is connected with encapsulation membrane shell heat-seal, electrically conductive draw forth the position in the periphery of encapsulation membrane shell.
10. The button cell of claim 9, wherein the tab structure further comprises an insulating glue layer attached to the connection portion, and the insulating glue layer extends to and is connected with the tab glue layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121728900.XU CN215869705U (en) | 2021-07-27 | 2021-07-27 | Tab structure and button cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121728900.XU CN215869705U (en) | 2021-07-27 | 2021-07-27 | Tab structure and button cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215869705U true CN215869705U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121728900.XU Active CN215869705U (en) | 2021-07-27 | 2021-07-27 | Tab structure and button cell |
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| Country | Link |
|---|---|
| CN (1) | CN215869705U (en) |
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2021
- 2021-07-27 CN CN202121728900.XU patent/CN215869705U/en active Active
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