CN114094164B - Manufacturing process of multi-lug battery cell and multi-lug battery cell - Google Patents
Manufacturing process of multi-lug battery cell and multi-lug battery cell Download PDFInfo
- Publication number
- CN114094164B CN114094164B CN202111314130.9A CN202111314130A CN114094164B CN 114094164 B CN114094164 B CN 114094164B CN 202111314130 A CN202111314130 A CN 202111314130A CN 114094164 B CN114094164 B CN 114094164B
- Authority
- CN
- China
- Prior art keywords
- tab
- foil
- foil tab
- manufacturing
- cutting
- 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
Classifications
-
- 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
-
- 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
-
- 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
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention belongs to the technical field of lithium batteries, and particularly discloses a manufacturing process of a multi-tab battery cell and the multi-tab battery cell, which comprises the steps of S1, preparing a pole piece; s2, cutting foil tabs and accommodating grooves on the pole pieces; s3, winding the pole piece and the diaphragm to prepare a multi-pole ear cell; s4, die-cutting the foil tab into a preset shape; s5, pressing a plurality of foil tabs, and then bending upwards, wherein a vertical surface of each foil tab is fixedly connected with each metal strip tab; s6, cutting the foil tab; s7, bending the foil tab into the accommodating groove so that the foil tab and the metal strip tab are accommodated in the accommodating groove; and S8, respectively sticking the protective gummed paper on the foil tab and the metal strip tab. The consistency of the foil tab groups after bending is improved, the loose condition of the foil tab groups is avoided, and the packaging rate of the bare cell is improved.
Description
Technical Field
The invention belongs to the technical field of lithium batteries, and particularly relates to a manufacturing process of a multi-tab battery cell and the multi-tab battery cell.
Background
At present, in the lithium battery industry, a head part of a multi-foil-material tab structure battery core is often used for folding a foil-material tab structure, the folding consistency is poor, the structure is loose after folding, the structure is easy to open before top sealing, the bare battery core is difficult to enter a shell, the influence on the position of the foil-material tab during packaging is large, the packaging rate is low, meanwhile, a certain length space is occupied at the head part of the battery core, the utilization rate of the internal space of the battery core is low, and the energy density of the battery core is lost to a certain extent.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects existing in the prior art, the manufacturing process of the multi-electrode lug battery cell is provided, the bending consistency of the foil material lug group can be improved, the bent foil material lug group is ensured to be compact in structure, the packaging difficulty of the bare battery cell is reduced, and meanwhile, the energy density of the bare battery cell can be improved.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a manufacturing process of a multi-lug battery cell comprises the following steps of S1, preparing a pole piece: preparing a pole piece through stirring, coating, rolling and slitting processes; s2, die cutting of foil tabs: cutting out foil tabs and accommodating grooves on the pole pieces; s3, preparing a multi-lug cell: winding the pole piece and the diaphragm to prepare a multi-pole ear cell; s4, cutting for the first time: die-cutting the foil tab into a preset shape; s5, welding foil lugs: after being pressed, the foil lugs are bent upwards, and a vertical surface of each foil lug is fixedly connected with the corresponding metal strip lug; s6, cutting for the second time: cutting the foil tab; s7, foil folding tab: bending the foil tab into the accommodating groove so that the foil tab and the metal strip tab are accommodated in the accommodating groove; s8, sticking protective adhesive: and respectively sticking the protective gummed paper on the foil tab and the metal strip tab.
Further, in the step S2, the foil tab and the accommodating groove are disposed on the same side.
Further, in the step S2, the width of the foil tab is smaller than or equal to the width of the accommodating groove.
Further, in the step S4, the tab of the foil is in a boss shape or a straight shape.
Further, in the step S5, the bending angle of the foil tab is 90 °.
Further, in the step S7, the bending angle of the foil tab is 90 °.
Further, in the step S5, the foil tab is pressed by an upper pressing block and a lower pressing block, the pressing temperature is 50-100 ℃, and the pressing pressure value is 0.8-1.2 Mpa.
Further, in the step S4, the foil tab is die-cut by laser, and in the step S6, the foil tab is cut by a cutting die.
Further, in the step S5, the metal strip tab is fixedly welded to one side of the foil tab through an ultrasonic welding process.
The second object of the present invention is: the multi-electrode lug battery cell is prepared by the manufacturing process, the space occupancy rate of the foil electrode lug after bending can be reduced, the energy density of the multi-electrode lug battery cell is improved, and the compact structure of the foil electrode lug group is ensured.
The invention has the beneficial effects that:
1. compared with the head folded tab structure of the conventional multi-tab battery cell, the manufacturing process of the multi-tab battery cell improves the consistency of foil tab groups after being folded, avoids the loose condition of the foil tab groups, and improves the packaging rate of bare battery cells;
2. compared with the head folded tab structure of the conventional multi-tab battery cell, the manufacturing process of the multi-tab battery cell provided by the invention can reduce the space occupation rate of the foil tab after being folded and improve the energy density of the multi-tab battery cell.
Drawings
Fig. 1 is a schematic structural view of an anode sheet in embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a cathode sheet in embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of a multi-tab cell in embodiment 1 of the present invention before first cutting a foil tab;
fig. 4 is a schematic diagram of the multi-tab cell in embodiment 1 of the present invention after the first cutting of the foil tab;
FIG. 5 is a schematic view of a foil tab in embodiment 1 of the present invention before folding;
fig. 6 is a schematic view of a foil tab in embodiment 1 after being folded;
fig. 7 is a schematic diagram of a foil tab in embodiment 1 of the present invention during a second cutting;
FIG. 8 is a schematic diagram of a welded foil tab and metal strap tab in embodiment 1 of the present invention;
fig. 9 is a schematic diagram of the foil tab in embodiment 1 after the second bending;
fig. 10 is a schematic structural diagram of a multi-pole ear cell in embodiment 1 of the present invention;
wherein: 1. an anode pole piece; 2. a cathode pole piece; 3. foil tab; 4. a receiving groove; 5. a multipolar ear cell; 6. metal strip lugs; 7. a diaphragm; 8. pressing into blocks; 9. pressing the block; 10. a left cutting die; 11. a right cutting die; 12. and (5) protecting glue.
Detailed Description
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "horizontal," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; unless specified or indicated otherwise, the terms "coupled," "fixed," and the like are to be construed broadly and are, for example, capable of being coupled either permanently or detachably, or integrally or electrically; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
In order to make the technical scheme and advantages of the present invention more apparent, the present invention and its advantageous effects will be described in further detail below with reference to the detailed description and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Example 1
As shown in fig. 1 to 10, the manufacturing process of the multipolar ear cell provided in this embodiment 1 includes S1, preparing a pole piece: preparing a pole piece through stirring, coating, rolling and slitting processes; s2, die cutting of foil tab 3: cutting a plurality of foil tabs 3 and a plurality of accommodating grooves 4 on the pole piece; s3, preparing a multi-electrode ear cell 5: winding the pole piece and the diaphragm 7 to prepare a multi-pole ear cell 5; s4, cutting for the first time: die-cutting the foil tab 3 into a preset shape; s5, welding foil lugs 3: after being pressed, the foil lugs 3 are bent upwards, and a vertical surface of each foil lug 3 is fixedly connected with the metal strip lug 6; s6, cutting for the second time: cutting the foil tab 3; s7, foil folding tab 3: bending the foil tab 3 into the accommodating groove 4, so that the foil tab 3 and the metal strip tab 6 are accommodated in the accommodating groove 4; s8, sticking protective adhesive 12: and (3) respectively sticking protective adhesive 12 paper on the foil tab 3 and the metal strip tab 6.
Specifically, the cathode pole piece 2 and the anode pole piece 1 which are matched with each other are prepared by sequentially carrying out processes of stirring, coating, rolling, slitting, lug die cutting, accommodating groove 4 die cutting and the like according to the design requirements of the battery cell model, and the cathode pole piece 2, the anode pole piece 1 and the diaphragm 7 are wound into a multi-lug battery cell 5.
It should be noted that, in this embodiment 1, the cathode sheet 2 includes a blank area, a dressing area and a safety area, the safety area is located between the blank area and the dressing area, and the safety area is coated with a safety coating, where the safety coating and the dressing area may be adjacently disposed, and the safety coating and the dressing area may be simultaneously coated, so that the coating time may be saved, and the stress and ductility of the dressing area and the safety area may be ensured to be the same during subsequent rolling, so as to avoid the phenomenon of wave wrinkling during rolling. In some embodiments, the safety coating and the dressing region are partially overlapped, and the safety coating and the dressing region are intermittently coated, so that the coating precision of the coating equipment is required to be relatively low, and the production cost is reduced. When the laser die cuts, the laser die cuts along the safety coating on the surface of the blank area, so that burrs are avoided from being generated on the pole piece, short circuit inside the battery cell caused by the fact that the burrs generated by die cutting puncture the diaphragm 7 can be prevented, and the safety performance of the battery cell is improved.
At present, in the structure of the folded tab of the head of the lithium battery, the foil tab 3 is welded with the externally connected metal strip tab 6 after being folded at least twice at one side of the bare cell, in the folding process, the folding consistency of the foil tab 3 is poor, the structure is loose, the welding difficulty of the metal strip tab 6 and the foil tab 3 is increased, moreover, the foil tab 3 occupies a larger space at the head of the bare cell easily, the volume of the battery is increased, the shell-entering difficulty of the bare cell is increased, and the defect existing in the current industry is overcome, in the S2 step, the tab is sheared out in the blank area of the pole piece, meanwhile, the cutting position of the accommodating groove 4 is matched with the cutting position of the tab, after the bare cell is rolled by the positive pole piece and the diaphragm 7, the accommodating groove 4 can be aligned with the positive pole tab and the negative pole tab respectively, so that the positive pole tab and the negative pole tab 4 can be placed in the positive pole tab and the positive pole tab of the foil tab 4, and the positive pole tab occupation rate of the positive pole tab 4 can be reduced.
In order to improve the energy density of the battery and the packaging rate of the bare cell, in the manufacturing process of the multi-electrode ear cell provided in the embodiment 1, after the foil electrode ear 3 is horizontally led out from one side of the multi-electrode ear cell 5, the foil electrode ear 3 is bent upwards by 90 degrees along the side surface of the multi-electrode ear cell 5, then a vertical surface of the foil electrode ear 3 is attached to the metal strip electrode ear 6 and is fixedly connected together through an ultrasonic welding process, the foil electrode ear 3 is bent towards the accommodating groove 4 again, the bending angle is 90 degrees, and one end of the foil electrode ear 3 is accommodated in the accommodating groove 4, and the other end is connected with the multi-electrode ear cell 5. The metal strip electrode lugs 6 are in a straight shape all the time, so that the connection firmness of the metal strip electrode lugs 6 and the foil electrode lugs 3 is ensured.
In this embodiment 1, the separator 7 includes a base material layer and a surface treatment layer. The substrate layer is a non-woven fabric, a film or a composite film with a porous structure, and the material of the substrate layer is at least one selected from polyethylene, polypropylene, polyethylene terephthalate and polyimide. Specifically, a polypropylene porous membrane, a polyethylene porous membrane, a polypropylene nonwoven fabric, a polyethylene nonwoven fabric or a polypropylene-polyethylene-polypropylene porous composite membrane can be selected.
Specifically, at least one surface of the base material layer is provided with a surface treatment layer, and the surface treatment layer may be a polymer layer or an inorganic layer, or may be a layer formed by mixing a polymer and an inorganic substance. The inorganic layer comprises inorganic particles and a binder, wherein the inorganic particles are selected from one or a combination of more of aluminum oxide, silicon oxide, magnesium oxide, titanium oxide, hafnium oxide, tin oxide, cerium oxide, nickel oxide, zinc oxide, calcium oxide, zirconium oxide, yttrium oxide, silicon carbide, boehmite, aluminum hydroxide, magnesium hydroxide, calcium hydroxide and barium sulfate. The binder is selected from one or more of polyvinylidene fluoride, copolymer of vinylidene fluoride-hexafluoropropylene, polyamide, polyacrylonitrile, polyacrylate, polyacrylic acid, polyacrylate, polyvinylpyrrolidone, polyvinyl ether, polymethyl methacrylate, polytetrafluoroethylene and polyhexafluoropropylene. The polymer layer contains a polymer, and the material of the polymer is at least one selected from polyamide, polyacrylonitrile, acrylic polymer, polyacrylic acid, polyacrylate, polyvinylpyrrolidone, polyvinyl ether, polyvinylidene fluoride or poly (vinylidene fluoride-hexafluoropropylene).
In order to improve the heat resistance, oxidation resistance and electrolyte wettability of the diaphragm 7, the adhesiveness between the diaphragm 7 and the positive and negative plates is enhanced. The separator 7 provided in this embodiment 1 is provided with a porous layer on the surface thereof, the porous layer being provided on at least one surface of the separator 7, the porous layer including inorganic particles and a binder, the inorganic particles being selected from at least one of alumina (Al 2O 3), silica (SiO 2), magnesia (MgO), titania (TiO 2), hafnia (HfO 2), tin oxide (SnO 2), ceria (CeO 2), nickel oxide (NiO), zinc oxide (ZnO), calcium oxide (CaO), zirconia (ZrO 2), yttria (Y2O 3), silicon carbide (SiC), boehmite, aluminum hydroxide, magnesium hydroxide, calcium hydroxide, or barium sulfate. The binder is at least one selected from polyvinylidene fluoride, copolymer of vinylidene fluoride-hexafluoropropylene, polyamide, polyacrylonitrile, polyacrylate, polyacrylic acid, polyacrylate, sodium carboxymethyl cellulose, polyvinylpyrrolidone, polyvinyl ether, polymethyl methacrylate, polytetrafluoroethylene or polyhexafluoropropylene.
Preferably, in the step S2, the foil tab 3 and the accommodating groove 4 are disposed on the same side. In this embodiment 1, the width of the foil tab 3 is 5-15 mm smaller than the width of the accommodating groove 4, so that the foil tab 3 can be accommodated in the accommodating groove 4 after being bent, and meanwhile, the energy density of the bare cell can be ensured to meet the production requirement.
Preferably, in the step S4, the foil tab 3 is in a boss shape or a straight shape. In this embodiment 1, the tab 3 of the foil is in a boss structure, and this structural design can enhance the connection firmness between the tab 3 of the foil and the bare cell, and at the same time, the tab 3 of the foil is easy to bend, and the external structure of the tab 3 of the foil is not limited to the type listed in this embodiment 1, but may be in an i-shape, trapezoid or other structure.
Preferably, in the step S5, the bending angle of the foil tab 3 is 90 °, and in the step S7, the bending angle of the foil tab 3 is 90 °.
Preferably, in the step S5, the upper pressing block 8 and the lower pressing block 9 are used for pressing the foil tab 3, the pressing temperature is 50-100 ℃, and the pressing pressure value is 0.8-1.2 Mpa. In this embodiment 1, the pressing temperature is preferably 65 ℃, the pressing pressure is preferably 1.2Mpa, and here, for illustration only, the pressing temperature may be 50 ℃, 60 ℃, 70 ℃, 75 ℃, 80 ℃, 85 ℃, 90 ℃, 95 ℃ or 100 ℃ and the pressing pressure may be 0.8Mpa, 0.9Mpa, 1.0Mpa or 1.1Mpa, alternatively, in other possible embodiments. When the foil tab 3 is bent, the ratio of the temperature and the pressure value directly influences the bending effect of the tab, the mechanical property of the foil tab 3 can be reduced due to overhigh temperature or overlarge pressure value, even the foil tab 3 is broken, the bending consistency of the foil tab 3 is poor due to overlow temperature or overlarge pressure value, and the welding firmness of the foil tab 3 and the metal strip tab 6 is reduced.
Preferably, in the step S4, the foil tab 3 is die-cut by using a laser, and in the step S6, the foil tab 3 is cut by using a cutting die. In S4, the foil tab 3 is die-cut by laser, so that the cutting precision of the foil tab 3 is improved. In addition, in the step S6, when the length of the foil tab 3 is cut, two cutting dies are arranged, namely a left cutting die 10 and a right cutting die 11, the foil tab 3 is positioned between the left cutting die 10 and the right cutting die 11, and the left cutting die 10 and the right cutting die 11 synchronously feed, so that the stress on the left side and the right side of the foil tab 3 is uniform during cutting, and the occurrence of bending deformation of the foil tab 3 is effectively avoided.
Preferably, in step S5, the metal strip tab 6 is fixedly welded on one side of the foil tab 3 through an ultrasonic welding process, so that some negative effects caused by excessively high or excessively low temperature of the thermal melting are avoided by adopting ultrasonic welding, and the connection firmness of the metal strip tab 6 and the foil tab 3 is improved.
The welding manner between the metal strip tab 6 and the foil tab 3 may be laser welding or other welding manners.
Example 2
The multipolar ear cell provided in this embodiment 2 is prepared by the multipolar ear cell manufacturing process in embodiment 1, which can reduce the space occupation rate of the foil electrode ear 3 after bending, improve the energy density of the multipolar ear cell 5, and ensure the compact structure of the foil electrode ear 3.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the embodiments of the disclosure may be suitably combined to form other embodiments as will be understood by those skilled in the art.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the invention pertains from the foregoing disclosure and teachings. Therefore, the present invention is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (10)
1. A manufacturing process of a multi-lug battery cell is characterized in that: comprising
S1, preparing a pole piece through stirring, coating, rolling and slitting processes;
s2, cutting foil tabs and accommodating grooves on the pole pieces;
s3, winding the pole piece and the diaphragm to prepare a multi-pole ear cell;
s4, die-cutting the foil tab into a preset shape;
s5, pressing a plurality of foil tabs, and then bending upwards, wherein a vertical surface of each foil tab is fixedly connected with each metal strip tab;
s6, cutting the foil tab;
s7, bending the foil tab into the accommodating groove so that the foil tab and the metal strip tab are accommodated in the accommodating groove;
and S8, respectively attaching the protective gummed paper on the foil tab and the metal strip tab.
2. The process for manufacturing the multi-electrode ear cell according to claim 1, wherein the process comprises the following steps: in the step S2, the foil tab and the accommodating groove are arranged on the same side.
3. The process for manufacturing the multi-electrode ear cell according to claim 1, wherein the process comprises the following steps: in the step S2, the width of the foil tab is smaller than or equal to the width of the accommodating groove.
4. The process for manufacturing the multi-electrode ear cell according to claim 1, wherein the process comprises the following steps: in the step S4, the foil tab is in a boss shape or a straight shape.
5. The process for manufacturing the multi-electrode ear cell according to claim 1, wherein the process comprises the following steps: in the step S5, the bending angle of the foil tab is 90 degrees.
6. The process for manufacturing the multi-electrode ear cell according to claim 1, wherein the process comprises the following steps: in the step S7, the bending angle of the foil tab is 90 °.
7. The process for manufacturing the multi-electrode ear cell according to claim 1, wherein the process comprises the following steps: in the step S5, the foil tab is pressed by an upper pressing block and a lower pressing block, the pressing temperature is 50-100 ℃, and the pressing pressure value is 0.8-1.2 Mpa.
8. The process for manufacturing the multi-electrode ear cell according to claim 1, wherein the process comprises the following steps: in the step S4, the foil tab is die-cut by laser, and in the step S6, the foil tab is cut by a cutting die.
9. The process for manufacturing the multi-electrode ear cell according to claim 1, wherein the process comprises the following steps: in the step S5, the metal strip tab is fixedly welded on one side of the foil tab through an ultrasonic welding process.
10. The utility model provides a multipolar ear electric core which characterized in that: prepared by the manufacturing process of the multipolar ear cell according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111314130.9A CN114094164B (en) | 2021-11-08 | 2021-11-08 | Manufacturing process of multi-lug battery cell and multi-lug battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111314130.9A CN114094164B (en) | 2021-11-08 | 2021-11-08 | Manufacturing process of multi-lug battery cell and multi-lug battery cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114094164A CN114094164A (en) | 2022-02-25 |
| CN114094164B true CN114094164B (en) | 2023-08-01 |
Family
ID=80299217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111314130.9A Active CN114094164B (en) | 2021-11-08 | 2021-11-08 | Manufacturing process of multi-lug battery cell and multi-lug battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114094164B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09199117A (en) * | 1996-01-12 | 1997-07-31 | Furukawa Battery Co Ltd:The | Positive plate and its manufacture |
| JPH10162861A (en) * | 1996-11-27 | 1998-06-19 | Kazuo Tagawa | Electrode structure of lithium ion battery and manufacture therefor |
| CN109888162A (en) * | 2019-03-26 | 2019-06-14 | 湖北锂诺新能源科技有限公司 | Have gluing structure battery core of embedded tab and preparation method thereof and lithium battery |
| CN113540405A (en) * | 2021-05-26 | 2021-10-22 | 惠州锂威新能源科技有限公司 | Manufacturing process of multi-tab pole piece, multi-tab pole piece and secondary battery |
| CN113571845A (en) * | 2021-06-24 | 2021-10-29 | 惠州锂威新能源科技有限公司 | Pole lug folding method for multi-pole-lug battery cell |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107408659B (en) * | 2014-10-10 | 2020-11-13 | 株式会社Lg化学 | Electrode assembly and method of manufacturing the same |
| KR102596034B1 (en) * | 2016-07-11 | 2023-10-31 | 삼성에스디아이 주식회사 | Secondary battery |
-
2021
- 2021-11-08 CN CN202111314130.9A patent/CN114094164B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09199117A (en) * | 1996-01-12 | 1997-07-31 | Furukawa Battery Co Ltd:The | Positive plate and its manufacture |
| JPH10162861A (en) * | 1996-11-27 | 1998-06-19 | Kazuo Tagawa | Electrode structure of lithium ion battery and manufacture therefor |
| CN109888162A (en) * | 2019-03-26 | 2019-06-14 | 湖北锂诺新能源科技有限公司 | Have gluing structure battery core of embedded tab and preparation method thereof and lithium battery |
| CN113540405A (en) * | 2021-05-26 | 2021-10-22 | 惠州锂威新能源科技有限公司 | Manufacturing process of multi-tab pole piece, multi-tab pole piece and secondary battery |
| CN113571845A (en) * | 2021-06-24 | 2021-10-29 | 惠州锂威新能源科技有限公司 | Pole lug folding method for multi-pole-lug battery cell |
Non-Patent Citations (1)
| Title |
|---|
| 对叠片式锂离子电池极耳弯折的研究;杨豪亮;韩广欣;刘兴丹;牛猛卫;;电池工业(02);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114094164A (en) | 2022-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111668451B (en) | Preparation method of pole piece for winding type multi-pole lug battery cell, pole piece and battery cell | |
| WO2021027492A1 (en) | Electrode assembly and battery cell | |
| CN210535760U (en) | Electrode assembly and secondary battery | |
| CN113193165B (en) | Tab pole piece and winding battery | |
| JP4920957B2 (en) | Stacked lithium ion polymer battery | |
| CN103733411A (en) | Jelly-roll with improved processability and battery cell including same | |
| JPWO2017163933A1 (en) | Nonaqueous electrolyte secondary battery | |
| CN214898757U (en) | Laminated lithium ion battery with high safety | |
| WO2019163392A1 (en) | Non-aqueous electrolyte secondary battery | |
| CN103490089A (en) | Electrode subassembly, preparation method thereof and lithium secondary battery | |
| CN218385635U (en) | Electrode plate, battery cell and button cell | |
| CN114094054A (en) | Multi-tab battery cell tab folding process, multi-tab battery cell and multi-tab battery | |
| CN110400959A (en) | A kind of winding double-core packet, winding double-core pack the method for making and lithium ion battery | |
| CN114830402A (en) | Electrochemical device and electronic device | |
| CN109065839A (en) | A kind of full tab positive plate, winding battery core and preparation method thereof | |
| WO2020170598A1 (en) | Electrode plate and method for manufacturing same, and secondary battery and method for manufacturing same | |
| CN105428632B (en) | A kind of preparation method of big porosity silver electrode | |
| CN114094164B (en) | Manufacturing process of multi-lug battery cell and multi-lug battery cell | |
| CN109888404A (en) | A kind of novel laminated batteries and preparation method thereof | |
| CN215418223U (en) | Pole piece for multi-tab battery cell and multi-tab battery cell | |
| CN213717028U (en) | Coiling electric core and anti-needling soft package battery comprising same | |
| CN105932290A (en) | Unit high-capacity polymer lithium ion battery positive plate and production method thereof | |
| CN115911398A (en) | Safe battery cell pole piece structure and lithium ion battery | |
| WO2022188400A1 (en) | Cylindrical lithium ion battery and manufacturing method therefor | |
| CN115842091A (en) | Battery pole piece, battery core, battery module, battery pack and electric device |
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 |