CN110911627B - Method for forming tab of intermittent coating type battery pole piece - Google Patents
Method for forming tab of intermittent coating type battery pole piece Download PDFInfo
- Publication number
- CN110911627B CN110911627B CN201911025820.5A CN201911025820A CN110911627B CN 110911627 B CN110911627 B CN 110911627B CN 201911025820 A CN201911025820 A CN 201911025820A CN 110911627 B CN110911627 B CN 110911627B
- Authority
- CN
- China
- Prior art keywords
- pole piece
- battery pole
- type battery
- coating type
- tab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 94
- 239000011248 coating agent Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 239000011889 copper foil Substances 0.000 claims description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 9
- 229910052744 lithium Inorganic materials 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a tab forming method of an intermittent coating type battery pole piece, which comprises the steps of prefabricating all tabs, welding the tabs in the process of producing the intermittent coating type battery pole piece, welding all the tabs to the same-direction end of an upper coating or a lower coating of the intermittent coating type battery pole piece, and finally cutting the pole piece, wherein redundant parts of the tabs are synchronously cut off when the pole piece is cut. The invention carries out sequential welding and pole piece slitting on the prefabricated pole piece, effectively controls burrs, ensures the safety of the battery cell, has continuous and efficient pole lug forming process and greatly improves the production efficiency of the battery pole piece.
Description
Technical Field
The invention relates to the field of lithium batteries, in particular to a method for forming a tab of an intermittent coating type battery pole piece.
Background
When the lithium ion battery cell is produced, the improvement of the first efficiency of the battery cell is an effective method for improving the energy density of the lithium ion battery cell, especially when silicon carbon is used as a negative electrode, the improvement of the first efficiency has a large space, and lithium supplement on the surface of a negative plate is an effective means for improving the first efficiency, and gradually becomes the focus of attention of research and development personnel of each enterprise. Among them, the rolling film-covering lithium pre-preparing technology is becoming a hot point for technical personnel to research and develop and apply due to its advantages of simple process, high automation degree and low cost.
The rolling film covering pre-lithium process is divided into two steps of rolling and film covering, and the pre-lithium amount per unit area is extremely low because the simple substance lithium has high specific capacity. From the viewpoint of cell design, the required calendering thickness is often less than 10 μm, and from the viewpoint of cost and efficiency, the advantages of cost and efficiency are far higher than those of wide lithium tapes while the thickness requirement is met by calendering the narrow lithium tapes.
When the narrow-width lithium belt is rolled and applied to a large battery core, the requirement for the width of the pole piece cannot be met, so that the battery pole piece is manufactured by adopting an intermittent coating mode.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for forming the tab of the intermittent coating type battery pole piece, the prefabricated pole piece is sequentially welded and cut, burrs are effectively controlled, the safety of a battery cell is ensured, the tab forming process is continuous and efficient, and the production efficiency of the battery pole piece is greatly improved.
The technical scheme of the invention is as follows:
a tab forming method of an intermittent coating type battery pole piece specifically comprises the following steps:
(1) prefabricating a lug with the same shape in a factory, wherein the length of the lug is greater than the spacing distance between adjacent upper coatings or adjacent lower coatings of the intermittent coating type battery pole piece, and the width of the lug is less than that of the intermittent coating type battery pole piece;
(2) in the process of manufacturing the intermittent coating type battery pole piece, all the tabs are welded on each upper layer coating of the intermittent coating type battery pole piece or each lower layer coating of the intermittent coating type battery pole piece at a welding station, and the tabs are welded at the head end of the corresponding upper layer coating or lower layer coating or welded at the tail end of the corresponding upper layer coating or lower layer coating;
(3) after the welding of the electrode lugs is finished, the intermittent coating type battery pole pieces are cut at a cutting station, and a cutting knife at the cutting station is cut from one end of the upper coating or the lower coating, which is not welded with the prefabricated electrode lugs, so that the electrode lugs of each cut battery pole piece are consistent in shape.
The lug is in a fillet quadrilateral shape.
The tab is a copper foil tab, and the intermittent coating type battery pole piece is a negative pole piece.
The thicknesses of the copper foil layer of the copper foil tab and the copper foil layer of the intermittent coating type battery pole piece are both 6-10 mu m.
In the step (2), the welding of the electrode lugs adopts ultrasonic welding.
Intermittent type coating type battery pole piece film-making in-process, the soldered connection of welding station department welds and cuts with the sword that cuts of cutting station department in step, wherein, the length of every upper coating and lower floor 'S coating is L, the spacing distance between adjacent upper coating or the adjacent lower floor' S coating is M, along film-making direction soldered connection and cut the distance S = L +2M between the sword.
And the cutting knife at the cutting station faces the upper coating or the lower coating of the intermittent coating type battery pole piece without welding the tab.
The cutting knife at the cutting station adopts a laser cutter.
The invention has the advantages that:
in the process of manufacturing the intermittent coating type battery pole piece, the welding and pole piece cutting of the pole lugs are sequentially carried out, and the redundant part of the pole lugs is cut off while the pole lugs are cut off, so that the pole lugs of each battery pole piece are ensured to be consistent in size, the whole pole lug forming process is continuous and efficient, and the production efficiency of the battery pole piece is greatly improved; the invention adopts ultrasonic welding, the welding is rapid, and the welding structure is stable; according to the invention, the pole pieces are cut by the laser cutter, so that the quantity of burrs caused by cutting is reduced; the cutting knife at the cutting station cuts the upper coating or the lower coating of the intermittent coating type battery pole piece, which is not welded with the pole lug, so that the cutting knife cannot damage the shape of the pole lug.
Drawings
FIG. 1 is a top view of an intermittently coated battery tab after welding.
Fig. 2 is a side view of the intermittently coated battery pole piece tab after welding in accordance with the present invention.
Fig. 3 is a schematic diagram of the cutting station of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a method for forming a tab of an intermittent coating type battery pole piece specifically comprises the following steps:
(1) prefabricating a lug 1 with a fillet quadrilateral shape in a factory, wherein the length of the lug 1 is greater than the spacing distance between adjacent upper coatings 2 of the intermittent coating type battery pole piece, and the width of the lug 1 is less than that of the intermittent coating type battery pole piece; wherein the tab 1 is a copper foil tab, the intermittent coating type battery pole piece is a negative pole piece, and the thicknesses of the copper foil tab and the copper foil layer of the intermittent coating type battery pole piece are both 6-10 mu m;
(2) in the process of manufacturing the intermittent coating type battery pole piece, the inner ends of all the tabs 1 are welded on the head end of the corresponding upper-layer coating 2 at a welding station by adopting an ultrasonic welding technology, and after the welding is finished, the outer ends of the tabs 1 extend out of a spacing area 4 between the adjacent upper-layer coatings or the adjacent lower-layer coatings;
(3) after welding of the tab 1 is completed, the intermittent coating type battery pole piece is cut at a cutting station, the laser cutter 5 at the cutting station faces the lower coating 3 of the intermittent coating type battery pole piece, the laser cutter 5 at the cutting station is cut from the tail end of the upper coating 2, and the outer end of the tab 1 is cut when the laser cutter at the cutting station cuts the battery pole piece, so that the tab shape of each cut battery pole piece is consistent.
The intermittent coating type battery pole piece production process comprises the steps that a welding head at a welding station and a laser cutter at a cutting station are used for synchronously welding and cutting, wherein the length of each upper coating is L, the spacing distance between every two adjacent upper coatings is M, and the distance between the welding head and the cutter along the production direction is S = L + 2M.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A tab forming method of an intermittent coating type battery pole piece is characterized by comprising the following steps: the method specifically comprises the following steps:
(1) prefabricating a lug with the same shape in a factory, wherein the length of the lug is greater than the spacing distance between adjacent upper coatings or adjacent lower coatings of the intermittent coating type battery pole piece, and the width of the lug is less than that of the intermittent coating type battery pole piece;
(2) during the process of manufacturing the intermittent coating type battery pole piece, all the tabs are welded on each upper layer coating of the intermittent coating type battery pole piece or each lower layer coating of the intermittent coating type battery pole piece at a welding station, the tabs are welded at the head end of the corresponding upper layer coating or lower layer coating or the tail end of the corresponding upper layer coating or lower layer coating, and after the welding is finished, the outer end parts of the tabs extend out of the interval area between the adjacent upper layer coatings or the adjacent lower layer coatings;
(3) after the welding of the electrode lugs is finished, the intermittent coating type battery pole pieces are subjected to pole piece cutting at a cutting station, a cutting knife at the cutting station is used for cutting the end, which is not welded with the prefabricated electrode lug, of the upper coating or the lower coating, and the outer end part of the electrode lug is cut off when the laser cutter at the cutting station cuts the battery pole pieces, so that the electrode lugs of each cut battery pole piece are consistent in shape.
2. The method for forming the tab of the intermittent coating type battery pole piece, according to claim 1, is characterized in that: the lug is in a fillet quadrilateral shape.
3. The method for forming the tab of the intermittent coating type battery pole piece, according to claim 1, is characterized in that: the tab is a copper foil tab, and the intermittent coating type battery pole piece is a negative pole piece.
4. The method for forming the tab of the intermittent coating type battery pole piece, according to claim 3, is characterized in that: the thicknesses of the copper foil layer of the copper foil tab and the copper foil layer of the intermittent coating type battery pole piece are both 6-10 mu m.
5. The method for forming the tab of the intermittent coating type battery pole piece, according to claim 1, is characterized in that: in the step (2), the welding of the electrode lugs adopts ultrasonic welding.
6. The method for forming the tab of the intermittent coating type battery pole piece, according to claim 1, is characterized in that: intermittent type coating type battery pole piece film-making in-process, the soldered connection of welding station department and the sword that cuts of cutting station department weld in step and cut, wherein, the length of every upper coating and lower floor 'S coating is L, the spacing distance between adjacent upper coating or the adjacent lower floor' S coating is M, along the film-making direction soldered connection and cut the distance S between the sword and L + 2M.
7. The method for forming the tab of the intermittent coating type battery pole piece, according to claim 1, is characterized in that: and the cutting knife at the cutting station faces the upper coating or the lower coating of the intermittent coating type battery pole piece without welding the tab.
8. The method for forming the tab of the intermittent coating type battery pole piece, according to claim 1, is characterized in that: the cutting knife at the cutting station adopts a laser cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911025820.5A CN110911627B (en) | 2019-10-25 | 2019-10-25 | Method for forming tab of intermittent coating type battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911025820.5A CN110911627B (en) | 2019-10-25 | 2019-10-25 | Method for forming tab of intermittent coating type battery pole piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110911627A CN110911627A (en) | 2020-03-24 |
| CN110911627B true CN110911627B (en) | 2022-03-11 |
Family
ID=69815638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911025820.5A Active CN110911627B (en) | 2019-10-25 | 2019-10-25 | Method for forming tab of intermittent coating type battery pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110911627B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111384358B (en) * | 2020-03-25 | 2021-06-01 | 广州中国科学院工业技术研究院 | Manufacturing process of battery pole piece |
| CN111761364B (en) * | 2020-06-18 | 2022-04-12 | 合肥国轩高科动力能源有限公司 | Die cutting and welding equipment and method for intermittent coating type pole piece |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004311282A (en) * | 2003-04-09 | 2004-11-04 | Matsushita Electric Ind Co Ltd | Manufacturing method of nonaqueous electrolyte secondary battery |
| CN1979924A (en) * | 2005-12-10 | 2007-06-13 | 深圳市比克电池有限公司 | Method for cutting lithium ion cell pole piece |
| CN101023541A (en) * | 2004-09-30 | 2007-08-22 | 丰田自动车株式会社 | Sealed battery and sealed battery manufacturing method |
| CN201383526Y (en) * | 2009-03-04 | 2010-01-13 | 优科能源(漳州)有限公司 | Power lithium ion battery with novel structure and battery cell thereof |
| CN102017238A (en) * | 2009-01-14 | 2011-04-13 | 松下电器产业株式会社 | Positive electrode plate for nonaqueous battery, electrode group for nonaqueous battery and method for producing same, and rectangular nonaqueous secondary battery and method for manufacturing same |
| CN201970353U (en) * | 2011-01-12 | 2011-09-14 | 合肥国轩高科动力能源有限公司 | Cutting die for efficiently cutting multi-lug lithium ion battery pole pieces |
| CN102357923A (en) * | 2011-09-06 | 2012-02-22 | 深圳市格瑞普电池有限公司 | Pole piece dividing and cutting die and coating production method of pole piece |
| CN202695604U (en) * | 2012-05-21 | 2013-01-23 | 东莞市鸿德电池有限公司 | Roll core structural battery cell and lithium ion battery of roll core structural battery cell |
| CN105449160A (en) * | 2016-01-07 | 2016-03-30 | 广东凯德能源科技有限公司 | Break-resistant high-energy-density lithium ion battery positive plate and preparation method |
| CN205621798U (en) * | 2016-04-13 | 2016-10-05 | 河南新太行电源股份有限公司 | Lithium ion positive plate structure |
| CN106784602A (en) * | 2016-12-28 | 2017-05-31 | 中天储能科技有限公司 | A kind of cylindrical lithium ion battery pole piece winds burr removing method |
| CN206250283U (en) * | 2016-12-02 | 2017-06-13 | 东莞新能源科技有限公司 | A kind of cathode sheet and battery core |
| CN106848385A (en) * | 2017-03-23 | 2017-06-13 | 广东天劲新能源科技股份有限公司 | A kind of power soft bag lithium ionic cell of multireel cored structure |
| CN107768676A (en) * | 2017-09-05 | 2018-03-06 | 东莞市迈科新能源有限公司 | A kind of lithium ion battery and its pole piece |
| CN207611809U (en) * | 2017-11-13 | 2018-07-13 | 深圳市比克动力电池有限公司 | A kind of anode slice of lithium ion battery and lithium ion battery |
| CN109546077A (en) * | 2018-12-26 | 2019-03-29 | 蜂巢能源科技有限公司 | Electrode plates and preparation method thereof, lithium ion battery |
| CN209418625U (en) * | 2018-12-12 | 2019-09-20 | 上海德朗能动力电池有限公司 | A kind of coiled cylindrical electrodes of lithium-ion batteries structure |
-
2019
- 2019-10-25 CN CN201911025820.5A patent/CN110911627B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004311282A (en) * | 2003-04-09 | 2004-11-04 | Matsushita Electric Ind Co Ltd | Manufacturing method of nonaqueous electrolyte secondary battery |
| CN101023541A (en) * | 2004-09-30 | 2007-08-22 | 丰田自动车株式会社 | Sealed battery and sealed battery manufacturing method |
| CN1979924A (en) * | 2005-12-10 | 2007-06-13 | 深圳市比克电池有限公司 | Method for cutting lithium ion cell pole piece |
| CN102017238A (en) * | 2009-01-14 | 2011-04-13 | 松下电器产业株式会社 | Positive electrode plate for nonaqueous battery, electrode group for nonaqueous battery and method for producing same, and rectangular nonaqueous secondary battery and method for manufacturing same |
| CN201383526Y (en) * | 2009-03-04 | 2010-01-13 | 优科能源(漳州)有限公司 | Power lithium ion battery with novel structure and battery cell thereof |
| CN201970353U (en) * | 2011-01-12 | 2011-09-14 | 合肥国轩高科动力能源有限公司 | Cutting die for efficiently cutting multi-lug lithium ion battery pole pieces |
| CN102357923A (en) * | 2011-09-06 | 2012-02-22 | 深圳市格瑞普电池有限公司 | Pole piece dividing and cutting die and coating production method of pole piece |
| CN202695604U (en) * | 2012-05-21 | 2013-01-23 | 东莞市鸿德电池有限公司 | Roll core structural battery cell and lithium ion battery of roll core structural battery cell |
| CN105449160A (en) * | 2016-01-07 | 2016-03-30 | 广东凯德能源科技有限公司 | Break-resistant high-energy-density lithium ion battery positive plate and preparation method |
| CN205621798U (en) * | 2016-04-13 | 2016-10-05 | 河南新太行电源股份有限公司 | Lithium ion positive plate structure |
| CN206250283U (en) * | 2016-12-02 | 2017-06-13 | 东莞新能源科技有限公司 | A kind of cathode sheet and battery core |
| CN106784602A (en) * | 2016-12-28 | 2017-05-31 | 中天储能科技有限公司 | A kind of cylindrical lithium ion battery pole piece winds burr removing method |
| CN106848385A (en) * | 2017-03-23 | 2017-06-13 | 广东天劲新能源科技股份有限公司 | A kind of power soft bag lithium ionic cell of multireel cored structure |
| CN107768676A (en) * | 2017-09-05 | 2018-03-06 | 东莞市迈科新能源有限公司 | A kind of lithium ion battery and its pole piece |
| CN207611809U (en) * | 2017-11-13 | 2018-07-13 | 深圳市比克动力电池有限公司 | A kind of anode slice of lithium ion battery and lithium ion battery |
| CN209418625U (en) * | 2018-12-12 | 2019-09-20 | 上海德朗能动力电池有限公司 | A kind of coiled cylindrical electrodes of lithium-ion batteries structure |
| CN109546077A (en) * | 2018-12-26 | 2019-03-29 | 蜂巢能源科技有限公司 | Electrode plates and preparation method thereof, lithium ion battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110911627A (en) | 2020-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107234329B (en) | Method for welding tab of soft-packaged battery cell | |
| CN110911627B (en) | Method for forming tab of intermittent coating type battery pole piece | |
| JP2012513076A (en) | Secondary battery manufacturing method and secondary battery | |
| CN111668451A (en) | Preparation method of pole piece for winding type multi-tab battery cell, pole piece and battery cell | |
| CN104600250A (en) | Preparation method of lithium ion battery multi-pole-ear pole piece, preparation method of pole group and battery | |
| CN202050025U (en) | Laminated lithium battery | |
| CN110911646A (en) | Composite current collector roll welding and die cutting integrated equipment and roll welding and die cutting method | |
| CN101604763A (en) | A kind of narrow type lithium-ion battery and manufacturing process thereof | |
| CN114335662B (en) | Method and structure for welding lithium ion pole piece and battery cell | |
| CN112234262A (en) | Battery cell manufacturing method and lithium ion battery | |
| CN108598594A (en) | A kind of efficient laminated cell production technology | |
| CN108963175A (en) | The production method of the pole piece structure of battery, battery roll core and battery roll core | |
| CN110534797B (en) | Special-shaped lithium battery and manufacturing method thereof | |
| WO2024045738A1 (en) | Battery and battery manufacturing method | |
| CN104282948B (en) | The core of lithium battery and assembly method | |
| CN204464391U (en) | Battery core | |
| JP2017063002A (en) | Lamination type battery manufacturing method | |
| CN116487831A (en) | Manufacturing method of connecting sheet, connecting sheet and battery pack | |
| CN217485538U (en) | Winding type battery cell | |
| CN116544624A (en) | Multipolar ear cell structure and preparation method thereof | |
| CN106654148A (en) | Battery pole piece cutting method and battery core assembly method containing battery pole piece cutting method | |
| EP3508299B1 (en) | Method for manufacturing laminated metal foil | |
| CN215988879U (en) | Multi-tab rubberizing adhesive paper and rubberizing structure thereof | |
| CN211789256U (en) | Novel laminated battery | |
| CN114388743A (en) | Optimized preparation method of cylindrical lithium ion battery pole group |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |