CN113571845B - Pole lug folding method for multi-pole-lug battery cell - Google Patents
Pole lug folding method for multi-pole-lug battery cell Download PDFInfo
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- CN113571845B CN113571845B CN202110705870.9A CN202110705870A CN113571845B CN 113571845 B CN113571845 B CN 113571845B CN 202110705870 A CN202110705870 A CN 202110705870A CN 113571845 B CN113571845 B CN 113571845B
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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
- 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
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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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- 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
Abstract
The invention belongs to the technical field of batteries, and particularly relates to a method for folding a tab of a multi-tab battery cell, which comprises the following steps of firstly, cutting tabs on two types of pole pieces respectively, and then winding the two types of pole pieces and a diaphragm in sequence to prepare a bare battery cell with a multi-tab structure; step two, overlapping a plurality of tabs with the same polarity, cutting and hot-pressing to bend the tabs into foil tab groups with preset shapes, and bending the metal strip tabs with the through holes at preset angles, wherein tab glue is adhered to the surfaces of the metal strip tabs; thirdly, enabling the foil tab group to penetrate through the through hole, wrapping the root of the metal strip tab, and then fixedly connecting the foil tab group with the metal strip tab; and step four, sticking the protective adhesive paper on the foil tab group and the metal strip tab. According to the invention, the stability of the multi-tab structure is improved by optimizing the multi-tab process, and the position consistency of the bent tabs is improved.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a tab folding method of a multi-tab battery cell.
Background
Nowadays, green, high-efficiency secondary batteries are vigorously developed in various countries. The lithium ion battery as a novel secondary battery has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like.
In the trade at present, the ear structure is rolled over to the head of many utmost point ear structure electricity core and is used two schemes of folding commonly, and it is relatively poor to bend the uniformity, and the back structure of bending is looser, easily opens before the apical sealing, leads to naked electric core to go into the shell difficulty, and the utmost point ear position influence when to the encapsulation is great, and the encapsulation goodness is lower.
Disclosure of Invention
The invention aims to: aiming at the defects of the prior art, the tab folding method of the multi-tab battery cell is provided, and the stability of the multi-tab structure is improved by optimizing the multi-tab process, so that the improvement of the position consistency of the bent tabs is facilitated.
In order to achieve the purpose, the invention adopts the following technical scheme:
a tab folding method of a multi-tab battery cell comprises the steps of cutting tabs on two types of pole pieces respectively, and then winding the two types of pole pieces and a diaphragm in sequence to prepare a bare battery cell with a multi-tab structure; step two, overlapping a plurality of tabs with the same polarity, cutting and hot-pressing to bend the tabs into foil tab groups with preset shapes, and bending the metal strip tabs with the through holes at preset angles, wherein tab glue is adhered to the surfaces of the metal strip tabs; thirdly, enabling the foil tab group to penetrate through the through hole, wrapping the root of the metal strip tab, and then fixedly connecting the foil tab group with the metal strip tab; and step four, sticking the protective adhesive paper on the foil tab group and the metal strip tab.
In the second step, a metal cutting die or a wood board cutting die is used for cutting.
In the second step, hot pressing is carried out through an upper pressing block and a lower pressing block, the hot pressing temperature is 0-100 ℃, and the hot pressing pressure is 0.1-0.6 Mpa.
As an improvement of the method for folding the tabs of the multi-tab battery cell, the hot pressing temperature is 80 ℃, and the hot pressing pressure is 0.3Mpa.
In the second step, the shape of the through hole is matched with the shape of the foil tab group, and the bending angle of the metal strip tab is 70-110 degrees.
As an improvement of the tab folding method for a multi-tab electrical core, the bending angle of the metal strap tab is 90 °.
In the third step, the foil tab group and the metal strip tab are fixedly connected by welding, and the welding mode is laser welding.
The shape of the foil tab group is convex, the shape of the head of the metal strip tab is square, and the shape of the root of the metal strip tab is trapezoidal.
In the fourth step, the protective gummed paper includes a first protective gummed paper and a second protective gummed paper, the first protective gummed paper covers the bending position of the metal strip tab and the bending position of the foil tab group, and the second protective gummed paper covers the root of the metal strip tab.
As an improvement of the method for folding the tab of the multi-tab battery cell, in the first step, the method further includes:
coating active substance on the foil, then rolling and cutting to form the pole piece, the pole piece comprises a cathode piece and an anode piece, a plurality of cathode lugs are cut on the cathode piece, and a plurality of anode lugs are cut on the anode piece.
The method has the beneficial effects that the method comprises the steps of firstly, cutting the pole lugs on the two pole pieces respectively, and then winding the two pole pieces and the diaphragm in sequence to prepare the bare cell with the multi-pole-lug structure; step two, overlapping a plurality of tabs with the same polarity, cutting and hot-pressing to bend the tabs into foil tab groups with preset shapes, and bending a metal strip tab with a through hole at a preset angle, wherein tab glue is adhered to the surface of the metal strip tab; thirdly, enabling the foil tab group to penetrate through the through hole, wrapping the root of the metal strip tab, and then fixedly connecting the foil tab group with the metal strip tab; and step four, sticking the protective adhesive paper on the foil tab group and the metal strip tab. In the prior art, the common two-folding scheme for the head-folding lug structure of the multi-lug structure battery cell has poor bending consistency, loose structure after bending, easy opening before top sealing, difficult insertion of a naked battery cell into a shell, large influence on the lug position during packaging and low packaging success rate, so that in the step one, according to the specific model and size requirements of the battery, the stirring, coating, rolling, cutting, lug die cutting and multi-lug winding of the multi-lug structure are carried out, in order to obtain a foil lug group, in the step two, the redundant foil lug part or a staggered part of the wound naked battery cell needs to be cut, which is beneficial to improving the consistency of the foil lug group, meanwhile, the lug is subjected to hot-pressing bending treatment by adopting an air cylinder to obtain the foil lug group with a preset shape, and the foil lug group is thinner than the overlapped lug before hot-pressing bending, in order to fixedly connect the foil tab group and the metal strap tab, the foil tab group is passed through the through hole in the third step, the through hole can limit the position of the foil tab group, so that the foil tab group is not easy to loose and unfold, the foil tab group can wrap the root of the metal strap tab, the metal strap tab group is welded together by laser welding and other modes, the consistency of the bent tab position is improved, wherein the welding position of the foil tab group and the metal strap tab is positioned between the through hole and the edge of the metal strap tab, the welding effect is prevented from being influenced by the fact that laser directly passes through the through hole, and in the fourth step, through pasting protection adhesive tape, carry out the rubberizing protection with the utmost point ear structure of rolling over of the naked electric core after the welding, play the effect of the foil utmost point ear crowd, the strap utmost point ear of protection positive pole welding position and positive pole, reduce utmost point ear and take place the probability of scraping with external spare part, help improving the holistic steadiness of utmost point ear structure. According to the invention, the multi-tab process is optimized, the stability of the multi-tab structure is improved, and the position consistency of the bent tabs is improved.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a tab of a bare cell of the invention before cutting.
Fig. 2 is a schematic side structure view of a tab of a bare cell before cutting.
Fig. 3 is a schematic structural diagram of a tab of a bare cell of the invention after cutting.
Fig. 4 is a schematic structural diagram of a tab of a bare cell of the invention before hot pressing.
Fig. 5 is a schematic structural view of a tab of a bare cell of the invention after hot pressing.
Fig. 6 is a schematic structural view of the foil tab group and the metal strip tab of the present invention before welding.
Fig. 7 is a schematic structural view of the foil tab group and the metal strip tab after welding.
Fig. 8 is a schematic diagram of the rubberizing process after the foil tab group and the metal strip tab are welded.
Fig. 9 is a schematic view of the structure of the metal band tab of the present invention.
Fig. 10 is a schematic structural view of the metal strap tab after being bent according to the present invention.
Wherein the reference numerals are as follows:
1-naked electric core;
2-a female tab;
3-anode lug;
4-foil tab group;
5-metal band tab; 51-a through hole; 52-tab glue; 53-head; 54-root;
61-first protective gummed paper; 62-second protective gummed paper;
71-briquetting; 72-briquetting.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The description and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The present invention will be described in further detail with reference to fig. 1 to 10, but the present invention is not limited thereto.
Example one
A tab folding method of a multi-tab battery cell comprises the steps of firstly, cutting tabs on two pole pieces respectively, and then winding the two pole pieces and a diaphragm in sequence to prepare a bare battery cell 1 with a multi-tab structure; step two, overlapping a plurality of tabs with the same polarity, cutting and hot-pressing to bend the tabs into foil tab groups 4 with preset shapes, and bending the metal strip tabs 5 with through holes 51 at preset angles, wherein tab glue 52 is adhered to the surfaces of the metal strip tabs 5; thirdly, enabling the foil tab group 4 to penetrate through the through hole 51, wrapping the root 54 of the metal strip tab 5, and then fixedly connecting the foil tab group 4 with the metal strip tab 5; and step four, sticking the protective adhesive paper on the foil tab group 4 and the metal strip tab 5.
In the prior industry, the common two-folding scheme of the head electrode lug folding structure of the multi-electrode lug structure battery cell has poor bending consistency, loose structure after bending, easy opening before top sealing, difficult naked battery cell entering shell, large influence on the electrode lug position during packaging and low packaging goodness, therefore, in the step one, according to the specific model and size requirements of the battery, the stirring, coating, rolling, cutting, electrode lug die cutting and multi-electrode lug winding of the multi-electrode lug structure are carried out, in order to obtain a foil electrode lug group 4, in the step two, the redundant foil electrode lug part or dislocation part of the wound naked battery cell 1 needs to be cut, which is beneficial to improving the consistency of the foil electrode lug group 4, meanwhile, the electrode lug is subjected to hot-pressing bending treatment by adopting an air cylinder, so as to obtain the foil electrode lug group 4 with a preset shape, and the foil electrode lug group 4 is thinner than the overlapped electrode lug before hot-pressing bending, the foil tab group 4 can conveniently penetrate through the through hole 51 of the metal strip tab 5, the metal strip tab 5 can be bent by 90 degrees along the tab glue 52, the through hole 51 is rectangular, the size and the shape can be changed according to different model requirements, in order to fixedly connect the foil tab group 4 with the metal strip tab 5, the foil tab group 4 penetrates through the through hole 51 in the third step, the through hole 51 can limit the position of the foil tab group 4, so that the foil tab group 4 is not easy to loose and unfold, the foil tab group 4 can wrap the root 54 of the metal strip tab 5, the foil tab group 4 is welded with the metal strip tab 5 by laser welding and other modes, the consistency of the bent positions of the tabs is improved, wherein the welding positions of the foil tab group 4 and the metal strip tab 5 are positioned between the through hole 51 and the edge of the metal strip tab 5, avoid laser directly to pass through hole 51 and influence the welding effect, in addition, in step four, through pasting protection adhesive tape, carry out the rubberizing protection with the book utmost point ear structure of naked electric core 1 after the welding, play the effect of the foil utmost point ear crowd 4, the strap utmost point ear 5 of protection positive pole welding position and positive pole, reduce utmost point ear and take place the probability of scraping with external spare part, help improving the holistic steadiness of utmost point ear structure.
In the tab folding method of the multi-tab battery cell, in the second step, a metal cutting die or a wood board cutting die is adopted for cutting. In this embodiment, the metal cutting die or the wood cutting die can cut the excess foil tab portion of the bare cell 1, but the invention is not limited thereto, and cutting dies made of other materials can be used to cut the tab.
In the tab folding method of the multi-tab battery cell, in the second step, hot pressing is performed through the upper pressing block 71 and the lower pressing block 72, the hot pressing temperature is 80 ℃, and the hot pressing pressure is 0.3Mpa. The hot-pressing temperature and pressure are limited, the foil tab group 4 is prevented from being broken in the bending process, the overall mechanical strength of the foil tab group 4 is improved beneficially, and meanwhile, the temperature and the pressure are prevented from being too high, so that the production cost is increased.
In the tab folding method of the multi-tab cell according to the present invention, in the second step, the shape of the through hole 51 matches the shape of the foil tab group 4, and the bending angle of the metal strip tab 5 is 90 °. Because the shape of through hole 51 matches with the shape of foil utmost point ear crowd 4 for foil utmost point ear crowd 4 can pass through hole 51, and through hole 51 is the rectangle, also can change size and shape according to different model demands, wherein, before foil utmost point ear crowd 4 and strap utmost point ear 5 weld, buckle 90 with strap utmost point ear 5, be convenient for assemble together foil utmost point ear crowd 4 and strap utmost point ear 5, help improving battery assembly efficiency.
In the tab folding method of the multi-tab battery cell, in the third step, the foil tab group 4 and the metal strip tab 5 are fixedly connected by welding in a laser welding mode. In this embodiment, the foil tab group 4 and the metal strip tab 5 are fixedly connected by laser welding, but the invention is not limited thereto, and may also be fixedly connected by bonding, riveting or clamping, so as to meet the requirement that the foil tab group 4 and the metal strip tab 5 are contacted together.
In the tab folding method of the multi-tab electric core according to the present invention, in the fourth step, the protection gummed papers include a first protection gummed paper 61 and a second protection gummed paper 62, the first protection gummed paper 61 covers the bending position of the metal strip tab 5 and the bending position of the foil tab group 4, and the second protection gummed paper 62 covers the root 54 of the metal strip tab 5. Specifically, first protection adhesive tape 61 extends to utmost point ear glue 52 around from naked electric core 1 always, play the effect of the position of buckling at strap utmost point ear 5 and the position of buckling of foil utmost point ear crowd 4 of protection, second protection adhesive tape 62 is from the opposite side of naked electric core 1, the upper surface of root 54 through strap utmost point ear 5, extend to utmost point ear glue 52 all around always, can cover strap utmost point ear 5's root 54, play the foil utmost point ear crowd 4 of protection positive pole welding position and positive pole, strap utmost point ear 5's effect, reduce utmost point ear and the probability that external spare part took place to scratch, help improving the holistic steadiness of utmost point ear structure.
Example two
The difference from the first embodiment is that: the shape of the foil tab group 4 of this embodiment is a convex shape, the shape of the head 53 of the metal tape tab 5 is a square shape, the shape of the root 54 of the metal tape tab 5 is a trapezoid, the hot-pressing temperature is 10 ℃, the hot-pressing pressure is 0.1Mpa, and the bending angle of the metal tape tab 5 is 70 °. In this embodiment, after cutting, the shape of foil utmost point ear crowd 4 can be designed into type of convexity or other shapes, it can to satisfy foil utmost point ear crowd 4 to pass through hole 51, strap utmost point ear 5 falls into head 53 and root 54, root 54 is the one end that is close to naked electric core 1 promptly, the shape of the root 54 with strap utmost point ear 5 is trapezoidal, trapezoidal lower bottom is connected with head 53, the foil utmost point ear crowd 4 of type of convexity is cooperated, avoid taking place to scrape between root 54 of strap utmost point ear 5 and the foil utmost point ear crowd 4, lead to foil utmost point ear crowd 4 or strap utmost point ear 5 impaired, influence the ability that overflows of utmost point ear, wherein, the temperature and the pressure of injecing the hot-pressing are the minimum, prevent that temperature and pressure are too little, lead to foil utmost point ear crowd 4 to take place the fracture in the bending process.
Other methods are the same as the first embodiment and are not described herein again.
EXAMPLE III
The difference from the first embodiment is that: in the first step of this embodiment, the method further includes coating an active material on the foil, and then rolling and slitting the active material to form a pole piece, where the pole piece includes a cathode piece and an anode piece, a plurality of cathode lugs 2 are cut on the cathode piece, a plurality of anode lugs 3 are cut on the anode piece, the temperature of hot pressing is 100 ℃, the pressure of hot pressing is 0.6Mpa, and the bending angle of the metal strip lug 5 is 110 °. Specifically, the pole piece is divided into a cathode piece and an anode piece, a plurality of cathode lugs 2 are cut on the cathode piece, a plurality of anode lugs 3 are cut on the anode piece, a plurality of cathode lugs 2 are stacked to form a foil lug group 4 of the cathode before hot-pressing bending, a plurality of anode lugs 3 are stacked to form a foil lug group 4 of the anode before hot-pressing bending, the two foil lug groups 4 can adopt the lug folding process, and one foil lug group 4 can also adopt the process; the temperature and pressure of the hot pressing are limited to the maximum value, preventing the temperature and pressure from being excessively large, resulting in an increase in the production cost of the battery.
Other methods are the same as the first embodiment and are not described herein again.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A method for folding tabs of a multi-tab battery cell is characterized by comprising the following steps:
firstly, cutting tabs on two pole pieces respectively, and then winding the two pole pieces and a diaphragm in sequence to prepare a bare cell (1) with a multi-tab structure;
step two, overlapping a plurality of tabs with the same polarity, cutting and hot-pressing the tabs to bend the tabs into foil tab groups (4) with preset shapes, and bending metal strip tabs (5) with through holes (51) at preset angles, wherein tab glue (52) is adhered to the surfaces of the metal strip tabs (5);
thirdly, enabling the foil tab group (4) to penetrate through the through hole (51), wrapping the root (54) of the metal strip tab (5), and then fixedly connecting the foil tab group (4) with the metal strip tab (5);
and step four, sticking the protective adhesive paper on the foil tab group (4) and the metal strip tab (5).
2. The tab folding method for a multi-tab cell of claim 1, wherein: and in the second step, a metal cutting die or a wood board cutting die is adopted for cutting.
3. The tab folding method for a multi-tab battery cell of claim 1, wherein: and in the second step, hot pressing is carried out through an upper pressing block (71) and a lower pressing block (72), the hot pressing temperature is 0-100 ℃, and the hot pressing pressure is 0.1-0.6 Mpa.
4. The tab folding method for a multi-tab battery cell of claim 3, wherein: the hot pressing temperature is 80 ℃, and the hot pressing pressure is 0.3Mpa.
5. The tab folding method for a multi-tab battery cell of claim 1, wherein: in the second step, the shape of the through hole (51) is matched with the shape of the foil tab group (4), and the bending angle of the metal strip tab (5) is 70-110 degrees.
6. The tab folding method for a multi-tab battery cell of claim 5, wherein: the bending angle of the metal strip pole ear (5) is 90 degrees.
7. The tab folding method for a multi-tab cell of claim 1, wherein: in the third step, the foil electrode lug group (4) and the metal belt electrode lug (5) are fixedly connected through welding, and the welding mode is laser welding.
8. The tab folding method for a multi-tab cell of claim 7, wherein: the foil tab group (4) is convex, the head (53) of the metal strip tab (5) is square, and the root (54) of the metal strip tab (5) is trapezoidal.
9. The tab folding method for a multi-tab battery cell of claim 1, wherein: in the fourth step, the protective gummed paper comprises a first protective gummed paper (61) and a second protective gummed paper (62), the first protective gummed paper (61) covers the bending position of the metal strip pole ear (5) and the bending position of the foil pole ear group (4), and the second protective gummed paper (62) covers the root (54) of the metal strip pole ear (5).
10. The tab folding method for a multi-tab battery cell of claim 1, wherein in the first step, the method further comprises:
coating active material on the foil, then roll-in and cut and form the pole piece, the pole piece includes negative pole piece and positive pole piece, cuts out a plurality of negative pole ear (2) on the negative pole piece, cuts out a plurality of positive pole ear (3) on the positive pole piece.
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| CN202110705870.9A CN113571845B (en) | 2021-06-24 | 2021-06-24 | Pole lug folding method for multi-pole-lug battery cell |
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| CN202110705870.9A CN113571845B (en) | 2021-06-24 | 2021-06-24 | Pole lug folding method for multi-pole-lug battery cell |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114094164B (en) * | 2021-11-08 | 2023-08-01 | 惠州锂威新能源科技有限公司 | Manufacturing process of multi-lug battery cell and multi-lug battery cell |
| CN114094054A (en) * | 2021-11-10 | 2022-02-25 | 惠州锂威新能源科技有限公司 | Multi-tab battery cell tab folding process, multi-tab battery cell and multi-tab battery |
| CN114171774B (en) * | 2021-11-30 | 2023-02-10 | 湖北亿纬动力有限公司 | Battery cell processing method and tab pre-bending device |
| CN114975885B (en) * | 2022-06-13 | 2023-06-27 | 惠州锂威新能源科技有限公司 | Preparation method of tab pole piece, battery cell and lithium ion battery |
| CN115084791B (en) * | 2022-06-23 | 2023-11-03 | 万向一二三股份公司 | Method for manufacturing synthetic electrode lug |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002075324A (en) * | 2000-09-04 | 2002-03-15 | Mitsubishi Chemicals Corp | Battery |
| WO2020103014A1 (en) * | 2018-11-21 | 2020-05-28 | 深圳市马力科技有限公司 | Smart battery and lithium battery core thereof |
| CN210692601U (en) * | 2019-12-09 | 2020-06-05 | 常州瑞德丰精密技术有限公司 | Battery top cap structure with layering soft connection piece |
| JP2020129482A (en) * | 2019-02-08 | 2020-08-27 | 株式会社豊田自動織機 | Power storage device and apparatus for manufacturing power storage device |
| CN212461970U (en) * | 2020-06-11 | 2021-02-02 | 恒大新能源技术(深圳)有限公司 | Tab structure and lithium ion battery |
| CN213304296U (en) * | 2020-07-31 | 2021-05-28 | 惠州锂威新能源科技有限公司 | Multi-tab battery cell |
-
2021
- 2021-06-24 CN CN202110705870.9A patent/CN113571845B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002075324A (en) * | 2000-09-04 | 2002-03-15 | Mitsubishi Chemicals Corp | Battery |
| WO2020103014A1 (en) * | 2018-11-21 | 2020-05-28 | 深圳市马力科技有限公司 | Smart battery and lithium battery core thereof |
| JP2020129482A (en) * | 2019-02-08 | 2020-08-27 | 株式会社豊田自動織機 | Power storage device and apparatus for manufacturing power storage device |
| CN210692601U (en) * | 2019-12-09 | 2020-06-05 | 常州瑞德丰精密技术有限公司 | Battery top cap structure with layering soft connection piece |
| CN212461970U (en) * | 2020-06-11 | 2021-02-02 | 恒大新能源技术(深圳)有限公司 | Tab structure and lithium ion battery |
| CN213304296U (en) * | 2020-07-31 | 2021-05-28 | 惠州锂威新能源科技有限公司 | Multi-tab battery cell |
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