CN219759677U - Roll up core and have electric core of this roll up core - Google Patents
Roll up core and have electric core of this roll up core Download PDFInfo
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- CN219759677U CN219759677U CN202320647495.1U CN202320647495U CN219759677U CN 219759677 U CN219759677 U CN 219759677U CN 202320647495 U CN202320647495 U CN 202320647495U CN 219759677 U CN219759677 U CN 219759677U
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- 238000004804 winding Methods 0.000 claims abstract description 139
- 230000000712 assembly Effects 0.000 claims abstract description 31
- 238000000429 assembly Methods 0.000 claims abstract description 31
- 238000005452 bending Methods 0.000 claims abstract description 16
- 238000003466 welding Methods 0.000 claims description 18
- 239000003292 glue Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a winding core and an electric core with the winding core, wherein the winding core comprises two winding assemblies and a first isolating film; each winding assembly comprises a first winding main body, a second isolating film and a second winding main body which are sequentially stacked along a first direction; each winding assembly comprises at least two bending parts, and the bending parts are formed by bending one side of the winding assembly in a first direction to the other side so that the winding assembly is S-shaped; the two winding assemblies are sequentially stacked along the first direction and are blocked and wrapped by the first isolating film. The utility model can improve the battery capacity and enhance the integral structural strength of the battery core.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a winding core and an electric core with the winding core.
Background
The lithium ion battery has the advantages of high voltage, high specific energy, long cycle life, long storage time and the like, and is widely applied to portable electronic equipment such as mobile phones, digital cameras and portable computers, and also widely applied to large and medium-sized electric equipment such as electric automobiles, electric bicycles, electric tools and the like.
In the conventional lithium ion battery core winding, the battery core is formed by winding in the same direction, the edges of four corners of the battery core are provided with huge fillets, a huge allowance space is reserved in a square cavity, and secondly, the structural instability factors caused by the conventional battery core winding are enhanced and are extremely easy to be extruded to deform.
Therefore, in order to solve the problems of the cell capacity and the structural stability, a new cell winding scheme is needed.
Disclosure of Invention
The utility model aims to provide a winding core and an electric core with the winding core, which can improve the battery capacity and enhance the integral structural strength of the electric core.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the winding core comprises two winding assemblies and a first isolating film; each winding assembly comprises a first winding main body, a second isolating film and a second winding main body which are sequentially stacked along a first direction; each winding assembly comprises at least two bending parts, and the bending parts are formed by bending one side of the winding assembly in a first direction to the other side so that the winding assembly is S-shaped; the two winding assemblies are sequentially stacked along the first direction and are blocked and wrapped by the first isolating film.
The winding core is preferably provided with a part of the first isolating film arranged between the two winding assemblies, and the first isolating film is wound along the peripheries of the two winding assemblies to wrap the two winding assemblies.
The winding assembly further comprises a third isolating film, wherein the third isolating film is arranged on one side of the first winding main body far away from the second winding main body along the first direction.
The winding assembly further comprises a fourth isolating film, wherein the fourth isolating film is arranged on one side of the second winding main body far away from the first winding main body along the first direction.
The winding core, preferably, the first winding body is aluminum foil.
In the winding core, preferably, the second winding body is copper foil.
The winding core is preferably made of insulating materials, wherein the first isolating film, the second isolating film, the third isolating film and the fourth isolating film are all made of insulating materials.
The battery cell comprises the winding core.
The battery cell preferably further comprises a positive electrode lug and a negative electrode lug, wherein the positive electrode lug comprises two first sub-electrode lugs which are oppositely arranged, and the two first sub-electrode lugs are provided with welding ends which are mutually welded, so that the two first sub-electrode lugs are mutually welded at the welding ends to form the positive electrode lug; the negative electrode lug comprises two second sub-lugs which are oppositely arranged, and the two second sub-lugs are provided with welding ends which are welded with each other, so that the two second sub-lugs are welded with each other at the welding ends to form the negative electrode lug; the two first sub-tabs are respectively inserted into one of the two winding assemblies, and the first sub-tabs are attached to the first winding main body; the two second sub-tabs are respectively inserted into one of the two winding assemblies, and the second sub-tabs are attached to the second winding main body.
And the battery core is preferably provided with tab glue at the welding ends of the two first sub-tabs and the welding ends of the two second sub-tabs.
Due to the adoption of the technical scheme, the utility model has the following advantages:
the utility model adopts the S-shaped technology combining lamination and winding technology, can obtain the stability of the whole structure of the battery core on the premise of improving the enough capacity, and can provide high current and low internal resistance required by the battery core by adopting a reasonable winding route and a single body combination mode, thereby improving the difficulty requirement of the whole technology of the battery core.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Like parts are designated with like reference numerals throughout the drawings. In the drawings:
FIG. 1 is a schematic view of the winding assembly of the present utility model;
fig. 2 is a schematic view of the layered structure of the winding assembly of the first embodiment of the present utility model;
FIG. 3 is a schematic view of a first separator of the present utility model wrapped around two half cores;
fig. 4 is a schematic view of a layered structure of a winding assembly according to a second embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a cell of the present utility model.
The various references in the drawings are as follows:
1-winding assembly; 101-a first winding body; 102-a second barrier film; 103-a second winding body; 104-a first bending part; 2-a first separator; 3-a third barrier film; 4-fourth separation membrane; 5-positive electrode lugs; 501-a first sub-tab; 6-negative electrode ear; 601-a second sub-tab; 7-tab glue.
Detailed Description
Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "front", "rear", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The utility model provides a winding core and a battery core with the winding core, and the winding core structure can improve the battery capacity, play a role in resisting extrusion to a certain extent, further improve the integral structural strength of the battery core, and enable a battery core body to be more stable and reliable by special tab design and increase the stability of current output by combining an S-shaped lamination with winding.
The winding core and the battery core with the winding core provided by the embodiment of the utility model are described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the winding core provided by the utility model comprises two winding assemblies 1 and a first isolating film 2; each of the winding assemblies 1 includes a first winding body 101, a second separator 102, and a second winding body 103, which are sequentially stacked in a first direction; each winding assembly 1 comprises at least two bending parts 104, wherein the bending parts 104 are formed by bending one side of the winding assembly 1 in the first direction to the other side so that the winding assembly 1 takes an S shape; the two winding assemblies 1 are sequentially stacked in the first direction and are blocked and wrapped by a first separator 2 (see fig. 3).
Wherein the first direction is the thickness direction of the winding assembly 1.
In the above-described embodiment, it is preferable that, as shown in fig. 3, a portion of the first separator film 2 is disposed between the two winding assemblies 1, and the first separator film 2 is wound along the outer circumferences of the two winding assemblies 1 to wrap the two winding assemblies 1. Specifically, after the first separator 2 is wound along the outer circumferences of the two winding assemblies 1, the two winding assemblies 1 may be separated and wrapped. The initial section of the first separator 2 may be the outer circumference of one winding assembly 1 or the outer side of the other winding assembly 1, and the portion of the first separator 2 disposed between the two winding assemblies 1 may extend from one side of the winding assemblies 1 in the first direction to the other side thereof, thereby achieving separation of the two winding assemblies 1. As shown in fig. 3, the starting section of the separator 2 is the outer periphery of the first winding assembly 1, and extends from this position to the first corner of the winding assembly 1, until after bending at the corner, to the first corner of the second winding assembly 1, until after bending at the corner, to the second corner of the second winding assembly 1, and then to the third corner of the second winding assembly 1, until bending at the corner; and then to a fourth corner of the second winding assembly 1, which is also the second corner of the first winding assembly, and when extended to this corner, the first separator film 2 is folded toward the first winding assembly 1 and continues to extend toward the first corner of the first winding assembly 1, is folded at the first corner, then continues to extend toward the third corner of the first winding assembly 1 and is folded at the third corner, and finally extends toward the second corner of the second winding assembly until it is folded at the second corner, so that the first separator film 2 is wound around the periphery to wrap both winding assemblies.
In the above-described embodiment, preferably, as shown in fig. 4, the winding assembly 1 further includes a third separator 3, the third separator 3 being disposed at a side of the first winding body 101 away from the second winding body 103 in the first direction.
In the above-described embodiment, it is preferable that the winding assembly 1 further includes the fourth separator 4, the fourth separator 4 being disposed at a side of the second winding body 103 away from the first winding body 101 in the first direction.
In the above embodiment, the first winding body 101 is preferably aluminum foil.
In the above embodiment, the second winding body 103 is preferably copper foil.
In the above embodiment, it is preferable that the first separator 2, the second separator 102, the third separator 3, and the fourth separator 4 are all made of an insulating material.
The utility model also provides an electric core comprising the winding core.
In the above embodiment, as shown in fig. 5, preferably, the battery cell further includes a positive tab 5 and a negative tab 6, where the positive tab 5 includes two oppositely disposed first sub-tabs 501, and the two first sub-tabs 501 have welding ends welded to each other, so that the two first sub-tabs 501 are welded to each other at the welding ends to form the positive tab 5; the negative electrode lug 6 comprises two second sub-lugs 601 which are oppositely arranged, and the two second sub-lugs 601 are provided with welding ends which are mutually welded, so that the two second sub-lugs 601 are mutually welded at the welding ends to form the negative electrode lug 6; the two first sub-tabs 501 are respectively inserted into one of the two winding assemblies 1, and the first sub-tabs 5 are attached to the first winding main body 101; the two second sub-tabs 601 are respectively inserted into one of the two winding assemblies 1, and the second sub-tabs 601 are attached to the second winding body 103.
In the above embodiment, it is preferable that the welding ends of the two first sub-tabs 501 and the welding ends of the two second sub-tabs 601 are each provided with the tab glue 7. Thereby, the welded ends of the two first sub-tabs 501 or the welded ends of the two second sub-tabs 601 are sealed by the tab glue 7.
Therefore, the bipolar lug integrated design is adopted, and finally the two winding assemblies 1 are wrapped through the first isolating film 2, so that the utilization rate of a battery space can be further greatly improved, and the ED battery capacity of 6.7% is improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A winding core comprising two winding assemblies and a first separator;
each winding assembly comprises a first winding main body, a second isolating film and a second winding main body which are sequentially stacked along a first direction;
each winding assembly comprises at least two bending parts, and the bending parts are formed by bending one side of the winding assembly in a first direction to the other side so that the winding assembly is S-shaped;
the two winding assemblies are sequentially stacked along the first direction and are blocked and wrapped by the first isolating film.
2. The winding core according to claim 1, wherein a portion of the first separator is disposed between the two winding assemblies, and the first separator is wound around the outer circumferences of the two winding assemblies to wrap the two winding assemblies.
3. The winding core of claim 1, wherein the winding assembly further comprises a third separator film disposed on a side of the first winding body that is remote from the second winding body in the first direction.
4. The winding core of claim 3, wherein the winding assembly further comprises a fourth separator disposed on a side of the second winding body that is remote from the first winding body in the first direction.
5. The winding core according to claim 1, wherein the first winding body is aluminum foil.
6. The winding core of claim 1, wherein the second winding body is copper foil.
7. The winding core according to claim 4, wherein the first, second, third and fourth separator films are each made of an insulating material.
8. A battery cell comprising a winding core according to any one of claims 1 to 7.
9. The cell of claim 8, further comprising a positive tab and a negative tab, wherein the positive tab comprises two oppositely disposed first sub-tabs, and the two first sub-tabs have welding ends welded to each other, such that the two first sub-tabs are welded to each other at the welding ends to form a positive tab;
the negative electrode lug comprises two second sub-lugs which are oppositely arranged, and the two second sub-lugs are provided with welding ends which are welded with each other, so that the two second sub-lugs are welded with each other at the welding ends to form the negative electrode lug;
the two first sub-tabs are respectively inserted into one of the two winding assemblies, and the first sub-tabs are attached to the first winding main body;
the two second sub-tabs are respectively inserted into one of the two winding assemblies, and the second sub-tabs are attached to the second winding main body.
10. The cell of claim 9, wherein the welding ends of the two first sub-tabs and the welding ends of the two second sub-tabs are each provided with tab glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320647495.1U CN219759677U (en) | 2023-03-22 | 2023-03-22 | Roll up core and have electric core of this roll up core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320647495.1U CN219759677U (en) | 2023-03-22 | 2023-03-22 | Roll up core and have electric core of this roll up core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219759677U true CN219759677U (en) | 2023-09-26 |
Family
ID=88085401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320647495.1U Active CN219759677U (en) | 2023-03-22 | 2023-03-22 | Roll up core and have electric core of this roll up core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219759677U (en) |
-
2023
- 2023-03-22 CN CN202320647495.1U patent/CN219759677U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |