CN113224392A - Roll core for high-capacity battery, parallel roll core group and high-capacity battery - Google Patents
Roll core for high-capacity battery, parallel roll core group and high-capacity battery Download PDFInfo
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- CN113224392A CN113224392A CN202110527611.1A CN202110527611A CN113224392A CN 113224392 A CN113224392 A CN 113224392A CN 202110527611 A CN202110527611 A CN 202110527611A CN 113224392 A CN113224392 A CN 113224392A
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- battery
- positive
- core
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- winding core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The embodiment of the application discloses large capacity battery is with rolling up core, parallelly connected book core group and large capacity battery, the top surface or the top surface and the bottom surface that roll up the core all are equipped with positive negative pole ear, and two-sided positive negative pole ear rolls up the core and can roll up the core or two-sided positive negative pole ear rolls up the core with single-sided positive negative pole ear and stack parallelly connected from top to bottom. The high-capacity battery of the embodiment of the application adopts the winding core structure, and the single-side positive and negative electrode tab winding core or the double-side positive and negative electrode tab winding core is independently used for manufacturing the battery. The embodiment of the application is favorable for stacking and connecting the winding cores inside the battery in parallel, and permeating and radiating the electrolyte of the battery, and is favorable for making the battery longer and favorable for making a large-capacity battery.
Description
Technical Field
The embodiment of the application relates to the field of batteries, in particular to a roll core for a high-capacity battery, a parallel roll core group and a high-capacity battery.
Background
The problem of difficult electrolyte permeation can be caused even if the winding core can be lengthened due to the fact that the winding core cannot be directly lengthened due to equipment limitation of batteries in the current market; the lithium battery winding core in the current market mainly takes no pole lug, full pole lug and multi-pole lug as main parts and is limited by the arrangement of the pole lugs of the winding core, and the winding core is difficult to stack and connect in parallel. Due to the reasons, the prior art is difficult to manufacture a long battery with large capacity.
Under the background of 'carbon peak reaching' and 'carbon neutralization', the energy storage industry is expected to be developed greatly, but is influenced by the capacity of the battery, and the lithium battery needs to be connected in series and in parallel when in energy storage application, so that the number of connected parts is large, the connection steps are complex and tedious, the battery management system, the wire rods and the battery box are very large in consumption, and the energy storage cost is high.
Disclosure of Invention
In order to solve the problems, the embodiment of the application provides the winding core on the same side of the positive electrode lug and the negative electrode lug and the battery using the winding core, and the defects of the existing equipment are overcome.
In order to solve the above problem, the embodiment of the present application proposes the following technical solutions:
the roll core for the large-capacity battery is characterized in that the top surface or the top surface and the bottom surface of the roll core are provided with positive and negative electrode lugs, and a double-sided positive and negative electrode lug roll core can be vertically stacked and connected in parallel with a single-sided positive and negative electrode lug roll core or a double-sided positive and negative electrode lug roll core.
Preferably, the single-sided anode and cathode lug winding core or the double-sided anode and cathode lug winding core is independently used for manufacturing the battery.
Preferably, before winding the core, a margin smaller than 1/2 of the length of the pole piece is left at one end of one side or two sides of the positive and negative current collectors respectively during coating, the positive and negative current collectors are stacked in sequence by the diaphragm, the negative pole piece, the diaphragm and the positive pole piece, and the top surface or the top surface and the bottom surface of the winding core after winding are composed of a positive and negative pole lug spacing groove, a positive pole lug area with a half area except the spacing groove and a negative pole lug area with a half area.
Preferably, the winding core is characterized in that the winding core can be made into a round shape and a rectangular shape.
Preferably, the winding core is characterized in that the winding core is a lithium ion battery winding core.
The embodiment of the application also provides a large capacity battery is with parallelly connected book core group, its characterized in that stacks aforementioned book core parallelly connected, rolls up the electrically conductive connection piece welding of anodal and positive pole, negative pole and negative pole between the core connection face.
The embodiment of the application finally also provides a large-capacity battery, and the winding core is used.
Preferably, the battery is a cylindrical battery or a square battery.
Preferably, the positive and negative poles are coplanar, and the top surface of the battery can be provided with the positive and negative poles, and the top surface and the bottom surface of the battery can be provided with the positive and negative poles.
The beneficial effects of the embodiment of the application are as follows:
the winding core with the positive and negative lugs on the same side is arranged, and the positive and negative lugs can be arranged on the top surface and the bottom surface of the winding core at the same time, so that the internal resistance of the battery is effectively reduced, a method for saving wires is provided for stacking and connecting the battery cores inside the battery in parallel, the electrolyte permeation and heat dissipation of the battery are facilitated, the battery is longer, and the large-capacity battery is facilitated to be manufactured. Therefore, the using amount of the batteries of the energy storage system is reduced, the number of parts is saved, the connection steps are simplified, and the cost of the energy storage system is reduced.
Drawings
For ease of illustration, the embodiments of the present application are described in detail by the following detailed description and the accompanying drawings.
Fig. 1 is a schematic diagram of a margin before stacking positive and negative electrode sheets and a diaphragm according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a left blank after stacking positive and negative electrode plates and a diaphragm according to an embodiment of the present application.
Fig. 3 is a schematic view of a winding core according to an embodiment of the present application.
Fig. 4 is a core stacking diagram of an embodiment of the present application.
Fig. 5 is a schematic view of a single-layer battery according to an embodiment of the present application.
Fig. 6 is a schematic diagram of stacked parallel batteries according to an embodiment of the present application.
Description of reference numerals: 1-arranging positive and negative pole pieces and diaphragms of a single-side pole lug roll core; 2-arrangement of positive and negative pole pieces and diaphragms of a double-sided tab roll core; 3-laminating the single-side pole lug pole pieces; 4-laminating the pole pieces with the lugs on two sides; 5-single-side tab winding core; 6-winding core with double-faced pole ear; 7-parallel winding core group; 8-single layer cell; 9-stacking parallel batteries; 10-conductive connection pads.
Detailed Description
The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 6, the positive and negative electrode current collectors are coated with positive and negative electrode materials respectively on a coating machine, and are stacked in the order of the separator, the negative electrode, the separator, and the positive electrode as reference numeral 1 to form a single-sided tab pole piece stack 3, and are stacked in the order of the separator, the negative electrode, the separator, and the positive electrode as reference numeral 2 to form a double-sided tab pole piece stack 4.
The single-side tab pole piece lamination 3 can be wound into a single-side tab winding core 5 by a winding machine, the double-side tab pole piece lamination 4 can be wound into a double-side tab winding core 6 by the winding machine, the top surface of the wound single-side tab winding core 5 is provided with a tab spacing groove, a half-area positive electrode lug area and a half-area negative electrode lug area except the spacing groove, and the top surface and the bottom surface of the wound double-side tab winding core 6 are provided with the tab spacing groove, a half-area positive electrode lug area and a half-area negative electrode lug area except the spacing groove, so that the stacking parallel connection of battery winding cores is facilitated.
The rolled single-side tab winding core 5 with the positive and negative tabs on the top surface is a single-side tab winding core, and can be used for manufacturing a single-layer battery 8 together with other battery accessories.
The rolled double-sided tab roll core 6 with the positive and negative tabs on the top and bottom surfaces can be used for manufacturing batteries together with other battery accessories, the batteries can be provided with terminals on one side and positive and negative terminals on both sides, and the positive and negative terminals on both sides provide great convenience for the serial and parallel connection of the batteries.
The double-sided tab winding core 6 with the positive and negative tabs on the top and bottom surfaces is arranged on the top, the single-sided tab winding core 5 with the positive and negative tabs on the top surface is arranged on the bottom, the winding cores 6 and 5 are stacked, the positive tabs on the contact surfaces are aligned with the tabs, the negative tabs are aligned with the negative tabs, the positive tabs and the negative tabs are respectively welded together by the conductive connecting sheets 10, and the positive tabs and the negative tabs are manufactured and stacked together with other accessories to form the parallel battery 9.
Two double-sided tab winding cores 6 with positive and negative tabs on the top and bottom surfaces can be stacked up and down, the positive tabs on the contact surfaces are aligned with the tabs, the negative tabs are aligned with the negative tabs, the positive and positive tabs and the negative and negative tabs are respectively welded together by conductive connecting sheets 10, and the two double-sided tab winding cores and the negative tabs are manufactured together with other accessories to stack and connect batteries in parallel.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application and not for limiting the same, and although the embodiments of the present application are described in detail with reference to the above embodiments, those skilled in the art should understand that: modifications and equivalents may be made to the embodiments of the invention described herein without departing from the spirit and scope of the embodiments and as described herein, and are intended to be covered by the claims.
It will be appreciated by those of ordinary skill in the art that the examples herein may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or range of equivalency of the embodiments are to be embraced by the embodiments.
Claims (10)
1. The roll core for the large-capacity battery is characterized in that the top surface or the top surface and the bottom surface of the roll core are provided with positive and negative electrode lugs, and the double-sided positive and negative electrode lug roll core can be vertically stacked and connected in parallel with the single-sided positive and negative electrode lug roll core or the double-sided positive and negative electrode lug roll core.
2. The winding core according to claim 1, wherein the single-sided positive and negative electrode tab winding core or the double-sided positive and negative electrode tab winding core is used alone to manufacture a battery.
3. The winding core according to claim 1, wherein before winding the core, a margin smaller than 1/2 of the length of the pole piece is left at one end of one side or two ends of the positive and negative current collectors respectively during coating, the positive and negative current collectors are stacked in sequence by the diaphragm, the negative pole piece, the diaphragm and the positive pole piece, and after winding, the top surface or the top surface and the bottom surface of the winding core are composed of a positive and negative pole lug spacing groove, a positive pole lug area with a half area except the spacing groove and a negative pole lug area with a half area.
4. Winding core according to claim 1, characterized in that the winding core is made round and rectangular.
5. The winding core according to any of claims 1 to 4, characterized in that the winding core is a lithium ion battery winding core.
6. A parallel winding core group for a large-capacity battery is characterized in that winding cores according to any one of claims 1 to 5 are stacked and connected in parallel, and a positive electrode are welded with a conductive connecting sheet for the negative electrode between the connecting surfaces of the winding cores.
7. A large capacity battery comprising the parallel winding core group according to claim 6.
8. The battery of claim 7, wherein the battery is a cylindrical battery or a prismatic battery.
9. The battery of claim 7, wherein the positive and negative poles of the battery are coplanar and the top surface has positive and negative poles.
10. The battery of claim 7, wherein the positive and negative terminals of the battery are coplanar, and the top and bottom surfaces of the battery have positive and negative terminals.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110527611.1A CN113224392A (en) | 2021-05-14 | 2021-05-14 | Roll core for high-capacity battery, parallel roll core group and high-capacity battery |
| PCT/CN2022/092056 WO2022237805A1 (en) | 2021-05-14 | 2022-05-10 | Roll core for large-capacity battery, parallel roll core group, and large-capacity battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110527611.1A CN113224392A (en) | 2021-05-14 | 2021-05-14 | Roll core for high-capacity battery, parallel roll core group and high-capacity battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113224392A true CN113224392A (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110527611.1A Pending CN113224392A (en) | 2021-05-14 | 2021-05-14 | Roll core for high-capacity battery, parallel roll core group and high-capacity battery |
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| CN (1) | CN113224392A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022116909A1 (en) * | 2020-12-04 | 2022-06-09 | 中澳储能电力科技（西安）有限公司 | High-capacity lithium-ion battery |
| WO2022237805A1 (en) * | 2021-05-14 | 2022-11-17 | 陕西奥林波斯电力能源有限责任公司 | Roll core for large-capacity battery, parallel roll core group, and large-capacity battery |
-
2021
- 2021-05-14 CN CN202110527611.1A patent/CN113224392A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022116909A1 (en) * | 2020-12-04 | 2022-06-09 | 中澳储能电力科技（西安）有限公司 | High-capacity lithium-ion battery |
| WO2022237805A1 (en) * | 2021-05-14 | 2022-11-17 | 陕西奥林波斯电力能源有限责任公司 | Roll core for large-capacity battery, parallel roll core group, and large-capacity battery |
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