CN112103455A - Tab structure, application of tab structure, preparation method and preparation device - Google Patents
Tab structure, application of tab structure, preparation method and preparation device Download PDFInfo
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- CN112103455A CN112103455A CN202010888873.6A CN202010888873A CN112103455A CN 112103455 A CN112103455 A CN 112103455A CN 202010888873 A CN202010888873 A CN 202010888873A CN 112103455 A CN112103455 A CN 112103455A
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- tab
- pole piece
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- 238000002360 preparation method Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 10
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- UVXCXZBZPFCAAJ-UHFFFAOYSA-N arc-111 Chemical compound C1=C2OCOC2=CC2=C(N(CCN(C)C)C(=O)C3=C4C=C(C(=C3)OC)OC)C4=CN=C21 UVXCXZBZPFCAAJ-UHFFFAOYSA-N 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000000181 anti-adherent effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- 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
-
- 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
Abstract
The tab structure comprises an electrode pole piece and a tab body, wherein the tab body is of an isosceles trapezoid structure, and the angle between the waist edge of the tab body and the edge of the electrode pole piece body is more than or equal to 80 degrees and less than or equal to 85 degrees. The tab body is adjusted to be isosceles trapezoid, and the angle between the waist edge of the tab body and the electrode pole piece is limited, so that the structural design of the tab is optimized, and the anti-sticking performance of the tab body is improved; the method has important significance for improving the forming integrity and the electric core consistency of the battery pole piece, and has stronger applicability in the aspect of thin sheet laser forming.
Description
Technical Field
The application relates to the technical field of battery design, in particular to a tab structure, application of the tab structure, a preparation method of the tab structure and a preparation device of the tab structure.
Background
This section is intended to provide a background or context to the embodiments of the application. The description herein is not admitted to be prior art by inclusion in this section.
The square aluminum shell lithium ion battery is a main single battery cell used by the conventional lithium battery energy storage product, the multi-lug structure winding core is a main constituent unit of the square aluminum shell lithium ion battery, and the improvement of the consistency of the multi-lug winding core has important significance on the single battery cell. In the multi-tab winding core preparation process, the forming integrity of the positive and negative electrode plates is the basis for ensuring the consistency of the multi-tab winding core, wherein the improvement of the stability of the electrode plate forming process is an important guarantee of the integrity of the electrode plates.
The main modes of tab forming are hardware die cutting and laser die cutting, the hardware die cutting scheme gradually breaks away from the market due to the influence of metal burrs and high replacement cost of a cutter, and the laser die cutting becomes the mainstream production mode of tab forming at present. In the current production process of lithium ion battery pole pieces, the main influencing factors of the pole piece forming integrity comprise pole ear bending, pole ear damage, pole ear loss, pole piece damage and pole piece gaps, and the main difficult problem faced by each lithium ion at present is also solved.
Poor pole piece formation integrity is mainly caused by insufficient adhesive tape resistance of the tab structure and unstable formation process.
Disclosure of Invention
In view of the above, it is necessary to provide a tab structure to improve the tensile strength of the tab and improve the problem of adhesive tape during the tab forming process.
The technical scheme provided by the application is as follows:
a tab structure, which comprises an electrode piece and a tab body,
the tab body is in an isosceles trapezoid structure,
the angle between the waist edge of the tab body and the edge of the electrode pole piece body is more than or equal to 80 degrees and less than or equal to 85 degrees.
Preferably, one end of the tab body and the edge of the electrode pole piece are in circular arc transition, and the other end of the tab body is set to be a round angle.
Preferably, the circular arc is equal to the fillet radius.
Preferably, the radius of the circular arc edge and the radius of the round angle are 2 +/-0.5 mm.
The utility model provides a core is rolled up to many utmost points ear, includes a plurality of utmost point ear structures of coiling together, utmost point ear structure be the aforesaid utmost point ear structure.
The battery comprises a battery cell and further comprises the multi-lug winding core, wherein the multi-lug winding core is electrically connected with the battery cell.
An electricity utilization device comprises a device body and a battery fixed on the device body, wherein the battery is the battery.
The application also provides a preparation method of the tab, which comprises the following steps:
calculating the shortest width L1, the longest width L2 and the height h of the tab, and obtaining the final product by formula
Determining the included angle between the bevel edge and the bottom edge of the tab to determine a tab model, wherein the tab model is in an isosceles trapezoid shape, and
and determining a laser running path according to the lug model, and cutting the lug through laser.
Preferably, the laser running path is an isosceles triangle.
Preferably, in the process of cutting the pole lug, the pole lug is supported by using a pole piece cutting support plate.
The application also provides a device for manufacturing the pole lug, which is applied to the method for manufacturing the pole lug, wherein the pole piece cutting support plate is provided with a hollow structure along the laser operation path.
Preferably, the hollow structure extends 2mm to two sides by taking the laser running path as a central line.
Preferably, the two sides of the hollow structure on the pole piece cutting support plate are provided with symmetrical array type round hole structures.
Above-mentioned utmost point ear structure, it is through adjusting utmost point ear body to isosceles trapezoid to through the angle between restriction utmost point ear body waist limit and the electrode sheet, make utmost point ear structural design optimize, thereby promoted the anti adhesive tape performance in utmost point ear shaping process.
Drawings
The present application will be described in further detail with reference to the following drawings and detailed description.
Fig. 1 is an overall schematic view of a structure of a pole ear according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural view of a multi-tab winding core according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a pole piece support plate according to an embodiment of the present disclosure.
Description of the main element symbols:
Detailed Description
In order that the above objects, features and advantages of the embodiments of the present application can be more clearly understood, the present application will be described below with reference to the accompanying drawings and detailed description. In addition, the features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the application, and the described embodiments are merely a subset of embodiments of the application, rather than all 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 the embodiments of this application belong. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application.
The application provides a tab structure, which comprises an electrode pole piece and a tab body,
the tab body is in an isosceles trapezoid structure,
the angle between the waist edge of the tab body and the edge of the electrode pole piece body is more than or equal to 80 degrees and less than or equal to 85 degrees.
The application provides a core is rolled up to many utmost points ear, including a plurality of utmost point ear structures of coiling together, utmost point ear structure be the aforesaid utmost point ear structure.
The battery comprises a battery cell and further comprises the multi-lug winding core, wherein the multi-lug winding core is electrically connected with the battery cell.
An electricity utilization device comprises a device body and a battery fixed on the device body, wherein the battery is the battery.
The application also provides a preparation method of the tab, which comprises the following steps:
calculating the shortest width L1, the longest width L2 and the height h of the tab, and obtaining the final product by formula
Determining the included angle between the bevel edge and the bottom edge of the tab to determine a tab model, wherein the tab model is in an isosceles trapezoid shape, and
and determining a laser running path according to the lug model, and cutting the lug through laser.
The application also provides a device for manufacturing the pole lug, which is applied to the method for manufacturing the pole lug, wherein the pole piece cutting support plate is provided with a hollow structure along the laser operation path.
Above-mentioned utmost point ear structure, it is through adjusting utmost point ear body to isosceles trapezoid to through the angle between restriction utmost point ear body waist limit and the electrode sheet, make utmost point ear structural design optimize, thereby promoted the anti adhesive tape performance in utmost point ear structure forming process.
The following detailed description will further describe embodiments of the present application in conjunction with the above-described figures.
Referring to fig. 1 and fig. 2, a tab structure 100 applied to a multi-tab winding core includes an electrode tab 13 and a plurality of tab bodies 11, wherein the tab bodies 11 are disposed on one side of the electrode tab 13.
In one embodiment, the electrode sheet 13 is rectangular, the electrode sheet 13 includes two opposite long sides 131 and two opposite short sides 133, the electrode sheet 13 is wound to form a roll core, one of the short sides 133 is located inside the roll core, and the other short side 133 is located outside the roll core. In one embodiment, the electrode sheet 13 is a copper foil or an aluminum foil coated with an active material.
In one embodiment, the tab bodies 11 are disposed on one long side 131 of the electrode sheet 13, and after the electrode sheet 13 is wound into a roll, the tab bodies 11 are disposed at corresponding positions.
In one embodiment, the tab body 11 is in an isosceles trapezoid shape, and an angle θ between a waist edge of the tab body 11 and an edge of the electrode tab 13 is less than or equal to 85 °, preferably, θ is 80 ° to 85 °; it is understood that θ may be set to any one of values of 80 °, 81 °, 82 °, 83 °, 84 °, and 85 ° as required.
In an embodiment, the waist of utmost point ear body 11 with transition through circular arc 111 between the electrode sheet 13 edge, and utmost point ear body 11 is kept away from the both ends of electrode sheet 13 one side are the setting of fillet 113, through the transition of circular arc 111 and the setting of fillet 113, have avoided the appearance of apex angle in the utmost point ear body 11 forming process, alleviate the breakage of utmost point ear body 11 or electrode sheet 13 that 11 turning position sudden change of utmost point ear body leads to effectively. In one embodiment, the rounded corner 113 is equal to the radius R2 of the circular arc 111, and R2 is set to 1.5-2.5 mm. It is understood that the radius of the rounded corner 113 and the circular arc 111 can be set to any value of 1.5, 1.6, 1.7, 1.8, 1.9, 2.1, 2.2, 2.3, 2.4, 2.5mm according to requirements. Preferably, R2 is 2 mm.
Referring to fig. 2, an embodiment of the present application further provides a method for manufacturing a tab, which is used for manufacturing the tab structure 100, and includes the following steps:
s1: and (4) calculating the width and the height of the tab body 11 and determining a tab structure 100 model.
Specifically, the width of the tab body 11 is calculated according to the current overload requirement of the tab body 11, and the linear distance between the top of the tab body 11 and the electrode pole piece 13 is determined.
In one embodiment, the tab width is the overload current/(multiplying factor ×/number of layers per core tab ×/number of cores foil thickness), where the overload current is the maximum current passing through the tab body 11 and the foil thickness is the thickness of the copper foil making up the tab body 11.
And calculating the shortest width L1 of tab welding through the formula, and determining the height h of the tab according to the distance requirement from the welding point of the winding core cover plate to the diaphragm. In one embodiment, the minimum width L2 of the design of the tab bottom end has a length between the length of the cover plate flexible connection width part and the length of the cover plate bracket slot width. Through L1, L2 and h obtained by calculation, an included angle θ between the waist edge and the bottom edge of the tab body 11 is obtained:
s2: determining a laser travel path 201 according to the tab body 11 obtained in S1, and cutting the tab body 11 by laser.
Specifically, in one embodiment, the tab structure is cut by the tab manufacturing apparatus shown in fig. 3, wherein the laser operation path 201 is an isosceles triangle, and the length of the waist side of the isosceles triangle is equal to that of the tab body 11.
Referring to fig. 3, in an embodiment, in the process of cutting the tab body 11, a pole piece supporting plate 200 is used to support the tab body 11 and the electrode pole piece 13, the pole piece supporting plate 200 is located in the laser operation path 201 and is provided with a hollow structure 202, specifically, the hollow structure 202 is formed by extending 2mm from the laser operation path 201 to two sides, and the hollow structure 202 is used to facilitate the laser to advance in the cutting process.
In an embodiment, a circular hole structure 203 is further disposed on the pole piece support plate 200, and the circular hole structures 203 are located on two sides of the hollow structure 202 and are symmetrically disposed. The round hole structure 203 is used for carrying out point-like negative pressure stress adsorption on the electrode pole piece 13, so that the stability of the electrode pole piece 13 and the electrode lug body 11 in the operation process can be improved, and the pole piece integrity of the electrode lug body 11 after molding is effectively improved.
Assuming that the pole piece horizontally moves to the right after the pole piece is formed, and when the pole piece is adhered with a tape, please refer to fig. 1, a tape adhering point stress model can be simplified into a pulling force F at the bottom of the pole piece, a pulling force F2 at the top of the pole piece and a tape adhering point pulling force F1, wherein the pulling force F is downward along the edge of the pole piece, the pulling force F2 is upward along the edge of the pole piece, and the pulling force F1 is horizontally leftward and opposite to the running direction of the pole piece.
If the tab is a right-angle tab, the tab is adhered with the tape under tension F1 and F, F2, the difference between the top fillet and the bottom fillet of the tab is large, and the tab is easily deformed under the action of the tension of the adhesive tape, so that the tab is bent and damaged.
In the tab structure 100, the tab body 11 is adjusted to be isosceles trapezoid, and the angle between the waist edge of the tab body 11 and the electrode sheet 13 is limited, so that when a tab is taped, a tab top tension F2 can generate a horizontal component force F '(F' ═ F2 × cos θ) for balancing a taped tension F1, thereby effectively alleviating adverse effects of the taped tension on the tab and improving the tab anti-taping performance; thereby optimizing the design of the tab structure 100 and improving the anti-adhesive tape performance of the tab body 11; the method has important significance for improving the forming integrity and the electric core consistency of the battery pole piece, and has stronger applicability in the aspect of thin sheet laser forming.
The preparation method of the tab effectively avoids the following steps: the laser cutting path is overlapped with the pole piece cutting support plate, the support plate is ablated by laser, slag residue is accumulated, and a pole piece foil between the laser cutting paths is not supported, so that the pole piece is easy to sink in the forming process, and the surface smoothness stability of the pole piece is damaged.
Although the embodiments of the present application have been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the embodiments of the present application.
Claims (13)
1. The utility model provides a utmost point ear structure, includes electrode plate and utmost point ear body, its characterized in that:
the tab body is in an isosceles trapezoid structure,
the angle between the waist edge of the tab body and the edge of the electrode pole piece body is more than or equal to 80 degrees and less than or equal to 85 degrees.
2. A tab structure as claimed in claim 1, wherein: one end of the tab body and the edge of the electrode pole piece are in circular arc transition, and the other end of the tab body is set to be a round angle.
3. A tab structure as claimed in claim 2, wherein: the circular arc is equal to the radius of the fillet.
4. A tab structure as claimed in claim 2, wherein: the radiuses of the circular arc edges and the circular corners are 2 +/-0.5 mm.
5. The utility model provides a core is rolled up to many utmost points ear which characterized in that: comprises a plurality of tab structures wound together, wherein the tab structures are as set forth in any one of claims 1-4.
6. A battery, includes electric core, its characterized in that: the multi-tab winding core of claim 5 further comprising the multi-tab winding core electrically connected to the cells.
7. The utility model provides a device of power consumption, includes the device body and fixes the battery on the device body which characterized in that: the battery is the battery of claim 6.
8. A preparation method of a tab is characterized by comprising the following steps: the method comprises the following steps:
calculating the shortest width L1, the longest width L2 and the height h of the tab, and obtaining the final product by formula
Determining the included angle between the bevel edge and the bottom edge of the tab to determine a tab model, wherein the tab model is in an isosceles trapezoid shape, and
and determining a laser running path according to the lug model, and cutting the lug through laser.
9. The method for manufacturing the tab as claimed in claim 8, wherein: the laser operation path is an isosceles triangle.
10. The method for manufacturing the tab as claimed in claim 9, wherein: and in the process of cutting the pole lug, the pole lug is supported by using a pole piece cutting support plate.
11. A manufacturing apparatus of a tab, which is applied to the manufacturing method of the tab according to any one of claims 8 to 10, wherein: and a hollow structure is arranged on the pole piece cutting support plate along the laser operation path.
12. The manufacturing device of the tab as claimed in claim 11, wherein: the hollow structure is arranged by taking the laser operation path as a central line and extending 2mm towards two sides.
13. The manufacturing device of the tab as claimed in claim 12, wherein: and symmetrical array type circular hole structures are arranged on the two sides of the hollow structure on the pole piece cutting supporting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888873.6A CN112103455A (en) | 2020-08-28 | 2020-08-28 | Tab structure, application of tab structure, preparation method and preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888873.6A CN112103455A (en) | 2020-08-28 | 2020-08-28 | Tab structure, application of tab structure, preparation method and preparation device |
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| Publication Number | Publication Date |
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| CN112103455A true CN112103455A (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010888873.6A Pending CN112103455A (en) | 2020-08-28 | 2020-08-28 | Tab structure, application of tab structure, preparation method and preparation device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113270693A (en) * | 2021-05-17 | 2021-08-17 | 微宏动力系统（湖州）有限公司 | Full-tab pole piece and winding battery |
| CN113744244A (en) * | 2021-09-03 | 2021-12-03 | 广东奥普特科技股份有限公司 | Online visual detection system for measuring distance from edge of lithium battery pole piece to edge of pole lug |
| CN114094288A (en) * | 2022-01-19 | 2022-02-25 | 江苏时代新能源科技有限公司 | Winding type electrode assembly, battery monomer, battery and electric equipment |
| CN114242952A (en) * | 2021-12-17 | 2022-03-25 | 蜂巢能源科技(无锡)有限公司 | Forming method and forming device for electrode plate of lithium ion battery |
| CN114583113A (en) * | 2022-03-03 | 2022-06-03 | 厦门海辰新能源科技有限公司 | Pole piece manufacturing method and pole piece |
| CN114614211A (en) * | 2022-03-22 | 2022-06-10 | 东莞新能安科技有限公司 | Electrochemical device, battery module, and electronic device |
| WO2023028815A1 (en) * | 2021-08-31 | 2023-03-09 | 宁德时代新能源科技股份有限公司 | Wound electrode assembly, battery cell, battery and electrical device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113270693A (en) * | 2021-05-17 | 2021-08-17 | 微宏动力系统（湖州）有限公司 | Full-tab pole piece and winding battery |
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| CN114242952B (en) * | 2021-12-17 | 2023-12-08 | 蜂巢能源科技(无锡)有限公司 | Forming method and forming device for electrode plate of lithium ion battery |
| CN114094288A (en) * | 2022-01-19 | 2022-02-25 | 江苏时代新能源科技有限公司 | Winding type electrode assembly, battery monomer, battery and electric equipment |
| CN114094288B (en) * | 2022-01-19 | 2022-07-05 | 江苏时代新能源科技有限公司 | Wound electrode assembly, battery cell, battery and electric equipment |
| WO2023137950A1 (en) * | 2022-01-19 | 2023-07-27 | 江苏时代新能源科技有限公司 | Wound-type electrode assembly, battery cell, battery, and electric device |
| CN114583113A (en) * | 2022-03-03 | 2022-06-03 | 厦门海辰新能源科技有限公司 | Pole piece manufacturing method and pole piece |
| CN114614211A (en) * | 2022-03-22 | 2022-06-10 | 东莞新能安科技有限公司 | Electrochemical device, battery module, and electronic device |
| CN114614211B (en) * | 2022-03-22 | 2024-01-23 | 东莞新能安科技有限公司 | Electrochemical device, battery module and electronic device |
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