CN211376807U - Battery pole piece, battery roll core and cylindrical battery - Google Patents
Battery pole piece, battery roll core and cylindrical battery Download PDFInfo
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- CN211376807U CN211376807U CN201922095964.XU CN201922095964U CN211376807U CN 211376807 U CN211376807 U CN 211376807U CN 201922095964 U CN201922095964 U CN 201922095964U CN 211376807 U CN211376807 U CN 211376807U
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- battery
- pole piece
- positive
- roll core
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The application discloses battery pole piece, battery roll core and cylindrical battery, wherein battery pole piece includes: the pole piece comprises a pole piece body, a pole piece body and a pole piece, wherein the pole piece body is provided with a length direction and a width direction perpendicular to the length direction; the pole piece body is in the same side of width direction, and each the pole piece is along length direction interval arrangement, each the pole piece all has length dimension on the length direction. The battery roll core and the cylindrical battery manufactured by the battery pole piece have small internal resistance and strong electrolyte infiltration capacity.
Description
Technical Field
The application relates to a battery pole piece, a battery roll core and a cylindrical battery.
Background
With the development of the lithium ion battery industry, the electric automobile technology is mature and improved day by day, the application of the power lithium ion battery is wider and wider, and the attention of people to the power performance of the lithium ion battery follows.
In the existing lithium ion battery manufacturing process, if the electrolyte infiltration effect is not good, the ion transmission path becomes far, so that shuttling of lithium ions between a positive electrode and a negative electrode is hindered, a pole piece which is not contacted with the electrolyte cannot participate in the battery electrochemical reaction, and meanwhile, the battery interface resistance is increased, so that the rate performance, the discharge capacity and the service life of the lithium battery are influenced. The performance of the battery is greatly affected, and therefore the step of soaking the electrolyte in the battery after electrolyte injection is very important.
Disclosure of Invention
The purpose of the application is: the battery roll core and the cylindrical battery made of the battery pole piece not only have small internal resistance, but also have strong electrolyte infiltration capacity.
The technical scheme of the application is as follows:
a battery pole piece, comprising:
the pole piece comprises a pole piece body, a pole piece body and a pole piece, wherein the pole piece body is provided with a length direction and a width direction perpendicular to the length direction; and
the pole piece body is in the same side of width direction, and each the pole piece is along length direction interval arrangement, each the pole piece all has length dimension on the length direction.
In the length direction of the pole piece body, the length size of each pole lug is gradually increased, and meanwhile, the distance between the pole lugs is gradually increased.
The utility model provides a battery roll core, is by positive plate, negative pole piece and arrange in the positive plate with the cylindrical structure that diaphragm between the negative pole piece was convoluteed and is formed, the axial one end of cylindrical structure is equipped with an organic whole and forms in a plurality of positive ear on the positive plate, the positive plate is the battery pole piece of above-mentioned structure, each positive ear is through rubbing flat processing.
Each positive lug is in fan-shaped distribution at one axial end of the cylindrical structure.
Each positive lug is distributed in four sectors at one axial end of the cylindrical structure, and the four sectors are uniformly distributed along the circumferential direction.
The battery comprises a cylindrical structure and is characterized in that a plurality of negative electrode lugs integrally formed on a negative electrode plate are arranged at the other axial end of the cylindrical structure, the negative electrode plate is also a battery electrode plate with the structure, and each negative electrode lug is also subjected to flattening treatment.
A cylindrical battery comprising:
a cylindrical battery case having a cylindrical shape and a cylindrical shape,
a positive terminal provided at one axial end of the battery case,
a battery roll core accommodated in the battery case, and
the positive current collecting disc is accommodated in the battery shell and is connected with the battery winding core and the positive terminal;
the battery roll core is characterized in that the battery roll core is of the structure, and the positive pole current collecting disc is welded and fixed with the positive pole lug after being kneaded to be flat.
The utility model provides a battery roll core, is by positive plate, negative pole piece and arrange in the positive plate with the cylindrical structure that diaphragm between the negative pole piece was convoluteed and is formed, cylindrical structure's axial one end is equipped with an organic whole and forms in a plurality of negative pole ear on the negative pole piece, its characterized in that, the negative pole piece is the battery pole piece of above-mentioned structure, each the negative pole ear is through rubbing flat processing.
Each negative electrode lug is distributed in a fan shape at one axial end of the cylindrical structure.
A cylindrical battery comprising:
a cylindrical battery case having a cylindrical shape and a cylindrical shape,
a negative terminal provided at one axial end of the battery case,
a battery roll core accommodated in the battery case, and
the negative current collecting disc is accommodated in the battery shell and is connected with the battery winding core and the negative terminal;
the battery roll core is the battery roll core with the structure, and the negative pole current collecting disc is welded and fixed with the rubbed flat negative pole lug.
The application has the advantages that:
1. after the battery pole piece is wound into the battery roll core, the number of the positive and negative lugs at the two ends of the battery pole piece is large, and the large number of the positive and negative lugs are respectively welded with the positive and negative current collecting discs after being flattened, so that the battery roll core and the current collecting discs have large current conducting areas, and the internal resistance of the battery is greatly reduced. Meanwhile, non-flattened non-tab areas are reserved on the end faces of the battery inner core, and a large number of gaps exist in the non-flattened non-tab areas, so that the absorption and infiltration of electrolyte are facilitated.
2. On the length direction of pole piece body, the length size of each utmost point ear increases gradually, and the distance between each utmost point ear increases gradually simultaneously, so after it rolled up into columniform battery and rolls up the core, each utmost point ear on it is fan-shaped distribution in cylindrical terminal surface just regularly very, when guaranteeing to roll up the core and to electrolyte infiltration ability, promotes to the utmost and collects the dish and knead the electrically conductive area who levels utmost point ear.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a battery pole piece in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a battery roll core in an embodiment of the present application;
wherein: 1-pole piece body, 2-pole ear and 3-battery winding core.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.
One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.
Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
Fig. 1 shows a preferred embodiment of the battery pole piece of the present application, which includes a pole piece body 1 made of metal and a plurality of tabs 2, wherein the pole piece body 1 has an elongated structure with a length direction and a width direction perpendicular to the length direction. The tabs 2 are all integrally disposed on the same side of the pole piece body 1 in the width direction, and the tabs 2 are arranged at intervals along the length direction (i.e., the length direction of the pole piece body), and each tab 2 has a length dimension in the length direction (i.e., the length direction of the pole piece body) and a width dimension in the width direction (i.e., the width direction of the pole piece body).
Referring to fig. 1 again, in the length direction of the pole piece body 1, the length dimension of each tab 2 gradually increases, and the distance between each tab 2 gradually increases.
Fig. 2 shows a specific embodiment of the battery roll core of the present application, and like the conventional battery roll core, the battery roll core is also a cylindrical structure formed by winding a positive plate, a negative plate and a separator arranged between the positive plate and the negative plate, wherein one axial end of the cylindrical structure is provided with a plurality of positive tabs integrally formed on the positive plate (the tab indicated by reference numeral "2" in fig. 2 is the positive tab), and the other axial end of the cylindrical structure is provided with a plurality of negative tabs integrally formed on the negative plate.
The key improvement of the battery winding core is that the positive pole piece is the battery pole piece with the structure of figure 1, and each positive pole lug at the end part of the winding core is subjected to flattening treatment.
Further, in this embodiment, since the positive electrode tab is the battery tab with the structure shown in fig. 1, after the positive electrode tab is wound into the cylindrical battery roll core in cooperation with the negative electrode tab and the separator, the positive electrode tabs thereon are exactly regularly distributed in four sectors at one axial end of the cylindrical structure, and the four sectors are uniformly arranged along the circumferential direction.
The negative electrode sheet of the battery winding core is also the battery sheet having the structure shown in fig. 1 (the tab on the battery sheet constitutes the negative electrode tab of the negative electrode sheet), and each negative electrode tab is also subjected to flattening treatment. The negative electrode lugs are distributed in four sectors at the other axial end of the cylindrical structure regularly, and the four sectors are uniformly distributed along the circumferential direction.
Conventional cylindrical batteries generally include: the battery comprises a cylindrical battery shell, a positive terminal and a negative terminal which are respectively arranged at the two axial ends of the battery shell, a battery roll core accommodated in the battery shell, a positive current collecting disc accommodated in the battery shell and connected with the battery roll core and the positive terminal, and a negative current collecting disc accommodated in the battery shell and connected with the battery roll core and the negative terminal. The positive current collecting disc is used for leading the positive electrode of the battery winding core to the positive terminal, and the negative current collecting disc is used for leading the negative electrode of the battery winding core to the negative terminal.
When the cylindrical battery adopts the battery roll core with the structure of fig. 2, the positive electrode current collecting disc and the flattened positive electrode lug can be welded and fixed, and the negative electrode current collecting disc and the flattened negative electrode lug can be welded and fixed. The positive and negative lugs are numerous and are respectively welded with the positive and negative current collecting discs after the kneading treatment, so that the battery roll core and the current collecting discs have larger current guiding areas, and the internal resistance of the battery is greatly reduced. Meanwhile, non-flattened non-tab areas are reserved on the end faces of the battery inner core, and a large number of gaps exist in the non-flattened non-tab areas, so that the absorption and infiltration of electrolyte are facilitated.
It should be noted that, we can also design the positive plate in the cylindrical battery as the structure of fig. 1, and the negative plate adopts the traditional structure; or only the negative electrode tab in the cylindrical battery is designed in the structure of fig. 1, while the positive electrode tab adopts the conventional structure.
The above embodiments are only for illustrating the technical concepts and features of the present application, and the purpose of the embodiments is to enable people to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.
Claims (10)
1. A battery pole piece, comprising:
the pole piece comprises a pole piece body (1), wherein the pole piece body (1) is provided with a length direction and a width direction perpendicular to the length direction; and
a plurality of utmost point ear (2), each utmost point ear (2) homogeneous set up in width direction is in same one side of pole piece body (1), and each utmost point ear (2) are along length direction interval arrangement, each utmost point ear (2) all have length dimension on the length direction.
2. The battery pole piece according to claim 1, characterized in that the length dimension of each of the tabs (2) is gradually increased and the distance between each of the tabs (2) is gradually increased in the length direction of the pole piece body (1).
3. A battery roll core is a cylindrical structure formed by winding a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, wherein a plurality of positive lugs integrally formed on the positive plate are arranged at one axial end of the cylindrical structure, the battery roll core is characterized in that the positive plate is the battery plate according to claim 1 or 2, and each positive lug is subjected to flattening treatment.
4. The battery roll core of claim 3, wherein each positive tab is scalloped at the axial end of the cylindrical structure.
5. The battery roll core according to claim 4, wherein each positive tab has four sectors at the axial end of the cylindrical structure, and the four sectors are evenly arranged along the circumferential direction.
6. The battery roll core according to claim 3, wherein the other axial end of the cylindrical structure is provided with a plurality of negative electrode tabs integrally formed on the negative electrode sheet, the negative electrode sheet is also the battery electrode sheet according to claim 1 or 2, and each negative electrode tab is also subjected to a flattening treatment.
7. A cylindrical battery comprising:
a cylindrical battery case having a cylindrical shape and a cylindrical shape,
a positive terminal provided at one axial end of the battery case,
a battery roll core accommodated in the battery case, and
the positive current collecting disc is accommodated in the battery shell and is connected with the battery winding core and the positive terminal;
the battery winding core is characterized in that the battery winding core is the battery winding core according to any one of claims 3 to 6, and the positive electrode current collecting disc is welded and fixed with the flattened positive electrode lug.
8. A battery roll core is a cylindrical structure formed by winding a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, wherein one axial end of the cylindrical structure is provided with a plurality of negative electrode lugs integrally formed on the negative plate, the battery roll core is characterized in that the negative plate is the battery plate according to claim 1 or 2, and each negative electrode lug is subjected to flattening treatment.
9. The battery jellyroll of claim 8, wherein each of said negative electrode tabs is scalloped at said axial end of said cylindrical structure.
10. A cylindrical battery comprising:
a cylindrical battery case having a cylindrical shape and a cylindrical shape,
a negative terminal provided at one axial end of the battery case,
a battery roll core accommodated in the battery case, and
the negative current collecting disc is accommodated in the battery shell and is connected with the battery winding core and the negative terminal;
the battery roll core is characterized in that the battery roll core is the battery roll core according to claim 8 or 9, and the negative electrode current collecting disc is welded and fixed with the flattened negative electrode lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922095964.XU CN211376807U (en) | 2019-11-28 | 2019-11-28 | Battery pole piece, battery roll core and cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922095964.XU CN211376807U (en) | 2019-11-28 | 2019-11-28 | Battery pole piece, battery roll core and cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211376807U true CN211376807U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922095964.XU Expired - Fee Related CN211376807U (en) | 2019-11-28 | 2019-11-28 | Battery pole piece, battery roll core and cylindrical battery |
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| Country | Link |
|---|---|
| CN (1) | CN211376807U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957466A (en) * | 2019-11-28 | 2020-04-03 | 苏州安靠电源有限公司 | Battery pole piece, battery roll core and cylindrical battery |
| EP4354639A1 (en) * | 2022-10-13 | 2024-04-17 | CALB Group Co., Ltd. | Cylindrical battery |
| EP4354568A1 (en) * | 2022-10-13 | 2024-04-17 | CALB Group Co., Ltd. | Cylindrical battery |
-
2019
- 2019-11-28 CN CN201922095964.XU patent/CN211376807U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957466A (en) * | 2019-11-28 | 2020-04-03 | 苏州安靠电源有限公司 | Battery pole piece, battery roll core and cylindrical battery |
| EP4354639A1 (en) * | 2022-10-13 | 2024-04-17 | CALB Group Co., Ltd. | Cylindrical battery |
| EP4354568A1 (en) * | 2022-10-13 | 2024-04-17 | CALB Group Co., Ltd. | Cylindrical battery |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200828 Termination date: 20211128 |