CN106058137B - A kind of coiled lithium ion battery lug and its manufacturing method - Google Patents
A kind of coiled lithium ion battery lug and its manufacturing method Download PDFInfo
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- CN106058137B CN106058137B CN201610630031.4A CN201610630031A CN106058137B CN 106058137 B CN106058137 B CN 106058137B CN 201610630031 A CN201610630031 A CN 201610630031A CN 106058137 B CN106058137 B CN 106058137B
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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
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
A kind of coiled lithium ion battery lug of present invention offer and its manufacturing method, including two layers of diaphragm and anode, cathode pole piece are wound to few two circle around core, each circle draws lug from anode, cathode pole piece respectively, each circle lug is located at close positions through cutting die punch forming, lug width and spacing are calculated by computer-aided design system, it is equal with the unequal and adjacent lug spacing of lug width in group to control, it reduces and designs and develops the time, and can more precise control of sizes；Every group of lug can use same cutting die punch forming, considerably reduce equipment cost and equipment complexity, have very strong compatible functionalities, it is only necessary to add the i.e. compatible broader lug of a cutting die and more windings.
Description
Technical field
The present invention relates to a kind of battery pole ears, and in particular to a kind of coiled lithium ion battery lug and its manufacturing method.
Background technology
Electrodes of lithium-ion batteries has lamination and winding two ways, and coiled lithium ion battery is due to possessing faster system
Standby process and lower self-discharge rate obtain more multi-vendor use, but takeup type pole piece is inconsistent per circumference, causes
Often there is deviation in circle lug, needs different cutting dies to be cut, increases cost and process complexities, for this purpose, there is an urgent need for exploitations one
Kind coiled lithium ion battery lug simple in structure.
Invention content
Present invention aims at a kind of coiled lithium ion battery lug of offer and its manufacturing methods, by lug width design
At unequal, it ensure that the adjacent lug spacing of each circle is equal after deployment, save equipment cost, reduce process complexity, increase
Add reliability.
In order to achieve the above object, a technical solution of the invention is to provide a kind of coiled lithium ion battery lug,
It includes：
First electrode pole piece, first layer diaphragm, second electrode pole piece, the second layer diaphragm set is folded successively, is wound around core
At least two circles；
Each electrode plates among the first electrode pole piece and second electrode pole piece, respectively lead at least one set of pole
Ear；
In any one group of lug of each electrode plates, positioned at the lug width of latter circle more than before it one after winding
The lug width of circle, each circle lug overlapping after winding, and one end of each circle lug is staggered in terrace type, and the other end is aligned；
Wherein, the first electrode pole piece is anode pole piece, and the second electrode pole piece is cathode pole piece；
Alternatively, the first electrode pole piece is cathode pole piece, the second electrode pole piece is anode pole piece.
Preferably, each electrode plates lead to lug more than two；
The lug width for being located at latter circle in every group after the coiling is more than the lug width of a circle before it, respectively encloses lug
Overlapping, and one end is staggered in terrace type, and the other end is aligned；
In this lug more than two, the lug for being located at later group after the coiling is Chong Die with the lug of its previous group, after
One group of corresponding overlapping in position identical as the lug size of same number of turns is in previous group and after the coiling.
Preferably, the medium position of first electrode pole piece and second electrode pole piece therebetween is spaced from each other；
In any one group of lug of each electrode plates, one end that each circle lug is staggered is each to enclose close to the medium position
The other end of lug alignment is far from the medium position.
Preferably, it respectively encloses one end that lug is staggered in any one group of each electrode plates diagonally to fold, to keep
Between the lug of the electrode plates and the lug of another electrode plates, there are the safe distances for preventing short circuit enough.
Preferably, the spacing of adjacent lug is identical in any one group when each electrode plates expansion.
Preferably, the spacing of adjacent lug is identical in every group when each electrode plates expansion；Adjacent lug in later group
The spacing of adjacent lug differs in spacing, with previous group.
Another technical solution of the present invention is to provide a kind of manufacturing method of coiled lithium ion battery lug：By walking
One electrode plates of expansion are moved with control device, at least the one of the electrode plates is obtained by cutting die punch forming
Group lug；
Wherein, to same group of lug of the electrode plates, the same cutting die punching press is used；The width of the cutting die and this
The interval S of adjacent lug is identical in one group, and makes the width of latter lug in adjacent lug more than the width of previous lug；
When manufacturing any one group of lug of the electrode plates, since i=1, cycle executes step a ~ e：
A, electrode plates is made to be moved and the i-th lug width L along tape transport directioniEqual distance；
B, away from the i-th lug front end LiPlace uses the cutting die punching press that width is W；
C, make electrode plates along tape transport direction move with cutting die width W it is equal at a distance from；
D, i=i+1 is enabled；
E, numerical value i=i+1 of judgment step d whether be more than this group of lug setting quantity：If being more than, cycle is jumped out；If not yet
It has more than, then executes the step a of subsequent cycle with numerical value i=i+1 of step d.
Preferably, in practical applications, the electrode plates movement behaviour of the step a of the step c and i+1 lug of the i-th lug
Make, can continuously perform.
Preferably, the electrode plates are any one electrode plates in first electrode pole piece or second electrode pole piece；
First electrode pole piece and second electrode pole piece to stack direction identical as tape transport direction；Wherein, the first electrode pole piece is just
Pole pole piece, the second electrode pole piece is cathode pole piece；Alternatively, the first electrode pole piece is cathode pole piece, second electricity
Pole pole piece is anode pole piece；
In the manufacturing method, the first electrode pole piece, first layer diaphragm, second electrode pole set will be further folded successively
Piece, second layer diaphragm are wound to few two circle around core；
In any one group of each electrode plates after the coiling, latter lug in adjacent lug previous lug it
Latter circle is Chong Die with the previous lug, and the first end of latter lug is made to be staggered in terrace type with the first end of previous lug, and
The second end of latter lug is aligned with the second end of previous lug；
The first end of each lug is close to the medium position for separating first electrode pole piece and second electrode pole piece, second end
Far from the medium position.
Preferably, to each electrode plates using M cutting die punch formings of different size, correspondence obtains the electrode plates
M group lugs, M >=1；Wherein, the interval S of adjacent lug in the width of n-th of cutting die, with n-th group lugnIt is identical, and n-th group
The width of latter lug is more than the width of previous lug in interior adjacent lug；And in each group lug for making each electrode plates
The size for being in the lug of aligned identical order is identical and position after the coiling corresponds to overlapping；
When manufacturing the M group lugs of the electrode plates, since n=1, cycle executes step A ~ E：
A, it is equal to interval S using widthnCutting die, cycle execute step a ~ e, to manufacture all lugs in n-th group；
B, judge whether the numerical value of n is equal to M：If being equal to M, the cycle of step A ~ E is jumped out；If being less than M, step is continued to execute
C；
C, electrode plates is made to move the width of the last one lug in n-th group along tape transport direction；
D, it is equal to interval S using widthn+1Next cutting die, be L away from n-th group the last one lug front end distance
Position carries out punching press；
E, n=n+1 is enabled.
Preferably, by computer-aided design system, each group in each electrode plates of each lug width is precalculated
And adjacent lug spacing, and calculate the spacing of two adjacent groups lug in each electrode plates；
Further according to the result of calculation of computer-aided design system, to traveling electrode pole described in the tape transport control device
Piece walk strip length and tape transport direction is controlled.
The present invention compared with the conventional method, has the following advantages：
The lug that unequal width is used in the present invention ensure that adjacent lug spacing is equal in each group after pole piece flattening,
It is located at similar position after lug winding, lug lap area is the area of first lap lug.Therefore, it is possible to use one
Cutting die punch forming reduces technique and equipment complexity, and has very strong flexibility.
When lug width increases or windings increase, the middle part safe distance between positive and negative anodes reduces, and passes through at this time
Increase by one cutting die to realize；When safe distance reaches setting value when middle part, the cutting die of width bigger is replaced to increase spacing, is made
The equal in magnitude of the lug of the lug number of turns corresponding with previous group of the number of turns is corresponded to when obtaining later group winding, and position is overlapped.
Lug width and spacing are calculated by computer-aided design system CAD etc. in the present invention, reduces and designs and develops
Time, and can more precise control of sizes.
Description of the drawings
Fig. 1 is the schematic diagram after pole piece coiling in the present invention；
Fig. 2 is the enlarged diagram of structure at I in Fig. 1；
Fig. 3 is the enlarged diagram of structure at II in Fig. 1；
Fig. 4 is that lug is staggered partially folded enlarged diagram in Fig. 1；
Fig. 5 is in the present invention after anode pole piece flattening and the schematic diagram of corresponding cutting die；
Fig. 6, Fig. 7 are respectively the example of parameters figure of the first, second positive cutting die in the present invention；
Fig. 8 is in the present invention after cathode pole piece flattening and the schematic diagram of corresponding cutting die；
Fig. 9, Figure 10 are respectively the example of parameters figure of the first, second cathode cutting die in the present invention.
Specific implementation mode
The present invention is done by the way that a preferred embodiment for specifically using two cutting dies is described in detail below in conjunction with attached drawing
It is expanded on further.
As shown in Fig. 1 ~ Fig. 4, a kind of coiled lithium ion battery pole piece, including two layers of diaphragm and anode pole piece 1, cathode pole
Piece 2, with one layer of diaphragm, one layer（Positive or negative pole）Pole piece, another layer of diaphragm, another layer（Cathode or anode）The mode cloth of pole piece
It postpones and is wound to few two circle around core together, it (is just in this example that each circle draws lug from anode pole piece and cathode pole piece respectively
Negative electrode lug 1.1 ~ 1.14,2.1 ~ 2.14).
As shown in figure 4, lug extraction location leans on two close end, lug position that terrace shape is presented, each circle lug is close to two
End position (1.17,2.17) is overlapped, and is staggered close to medium position (1.15,2.15)；The part that can will be staggered, respectively diagonally
Line (1.16,2.16) is folded with direction shown in arrow 1.18 and 2.18 so that has enough safe distances between positive and negative lug
Prevent short circuit.
As shown in Fig. 5 ~ Fig. 7, anode pole piece corresponds to 1.1 ~ 1.14 totally 14 lugs in this example, first group of lug (1.1 ~
1.7) width：30mm, 31.82mm, 33.64mm, 35.46mm, 37.28mm, 39.10mm, 40.92mm；Second group of lug (1.8 ~
1.14) width：30mm, 31.82mm, 33.64mm, 35.46mm, 37.28mm, 39.10mm, 40.92mm.It is each in the example
In group it is any one circle lug width exceed in group before it one circle lug width numerical value（1.82mm）Be it is identical,
But it can also be designed to differ in other examples.
Each lug (1.1 ~ 1.14) of anode pole piece is by two cutting die punch formings, wherein between lug (1.1 ~ 1.7)
The first spacing be to be obtained by 31 punch forming of first anode cutting die, the second spacing between lug (1.7 ~ 1.14) is logical
Second positive 32 punch forming of cutting die is crossed to obtain.Also, x1 and x2 there are two types of adjacent lug spacing after pole piece flattening, first
Spacing x1 and the second spacing x2 is also respectively equal to the width of two positive cutting dies, in this example the width be respectively 218.80mm and
231.60mm。
Anode first group of first lap lug (1.1) it is identical with the size of second group of first lap lug (1.8) and winding after
Position correspond to, first group second circle lug (1.2) and second group second circle lug (1.9) size it is identical and winding after position
Correspondence is set, and so on.Strip length is walked by equipment to control each circle lug width so that positive each circle lug is located at phase
Near position, convenient for welding, lug lap area is the area of first lap lug.
As shown in Fig. 8 ~ Figure 10, cathode pole piece corresponds to 2.1 ~ 2.14 totally 14 lugs in this example, second group of lug (2.1 ~
2.7) width：30mm, 31.82mm, 33.64mm, 35.46mm, 37.28mm, 39.10mm, 40.92mm；First group of lug (2.8 ~
2.14) width：30mm, 31.82mm, 33.64mm, 35.46mm, 37.28mm, 39.10mm, 40.92mm.It is each in the example
In group it is any one circle lug width exceed in group before it one circle lug width numerical value（1.82mm）Be it is identical,
But it can also be designed to differ in other examples.
Each lug (2.1 ~ 2.14) of cathode pole piece is by two cutting die punch formings, wherein between lug (2.14 ~ 2.7)
Third spacing be to be obtained by 41 punch forming of first cathode cutting die；The 4th spacing between lug (2.7 ~ 2.1) is logical
Second 42 punch forming of cathode cutting die is crossed to obtain.Only there are two types of y1 and y2, the 4th spacing for adjacent lug spacing after pole piece flattening
Y1 and third spacing y2 is also respectively equal to the width of two cathode cutting dies, in this example the width be respectively 218.80mm and
231.60mm。
Second group of first lap lug (2.1) of cathode it is identical with the size of first group of first lap lug (2.8) and wind after
Position correspond to, second group second circle lug (2.2) and first group second circle lug (2.9) size it is identical and winding after
Position corresponds to, and so on.Strip length is walked by equipment and controls each circle lug width so that each circle lug of cathode is located at phase
Near position, convenient for welding, lug lap area is the area of first lap lug.
The relevant parameter numerical value of positive and negative lug in this example（Such as lug width, spacing）Unanimously, and tape transport direction, two cutting dies
Sequence etc. is made on the contrary, but in other examples can also according to circumstances corresponding adjusting parameter or direction in arranged direction, lug.
In addition, in this example, in the case that adjacent lug spacing is equal, the width of every lug can pass through computer aided manufacturing
Help design program（Such as CAD）It is calculated, not only result is more accurate, while being conveniently adjusted to reduce design time.Subsequently again
Pole piece tape transport length is controlled to control by equipment, but the present invention does not negate in other manners, to be counted to lug width
It calculates and controls.
Unequal lug width in the present invention so that it is equal with spacing between adjacent lug in group, a kind of knife can be used
Stamping is molded, considerably reduces equipment cost and equipment complexity, and which has very strong compatible functionalities, only
It needs to add the i.e. compatible broader lug of a cutting die and more windings.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. a kind of coiled lithium ion battery lug, which is characterized in that include：
First electrode pole piece, first layer diaphragm, second electrode pole piece, the second layer diaphragm set is folded successively, is wound to around core few
Two circles；
Each electrode plates among the first electrode pole piece and second electrode pole piece, respectively lead to lug more than two；
In any one group of lug of each electrode plates, positioned at the lug width of latter circle more than before it one circle after winding
Lug width, each circle lug overlapping after winding, and one end of each circle lug is staggered in terrace type, and the other end is aligned；
In this lug more than two, the lug for being located at later group after the coiling is Chong Die with the lug of its previous group, later group
The corresponding overlapping in position identical as the lug size of same number of turns is in previous group and after the coiling；
Wherein, the first electrode pole piece is anode pole piece, and the second electrode pole piece is cathode pole piece；
Alternatively, the first electrode pole piece is cathode pole piece, the second electrode pole piece is anode pole piece.
2. coiled lithium ion battery lug as described in claim 1, which is characterized in that
The medium position of first electrode pole piece and second electrode pole piece therebetween is spaced from each other；
In any one group of lug of each electrode plates, lug is respectively enclosed in one end that each circle lug is staggered close to the medium position
The other end of alignment is far from the medium position.
3. coiled lithium ion battery lug as claimed in claim 2, which is characterized in that
One end that lug is staggered respectively is enclosed in any one group of each electrode plates diagonally to fold, to keep the electrode plates
Between lug and the lug of another electrode plates, there are the safe distances for preventing short circuit enough.
4. coiled lithium ion battery lug as described in claim 1, which is characterized in that
The spacing of adjacent lug is identical in any one group when each electrode plates expansion.
5. coiled lithium ion battery lug as described in claim 1, which is characterized in that
The spacing of adjacent lug is identical in every group when each electrode plates expansion；The spacing of adjacent lug in later group, and it is previous
The spacing of adjacent lug differs in group.
6. a kind of manufacturing method of coiled lithium ion battery lug, which is characterized in that
One electrode plates of expansion are moved by tape transport control device, and the electrode is obtained by cutting die punch forming
The lug more than two of pole piece；
To each electrode plates using M cutting die punch formings of different size, correspondence obtains the M group lugs of the electrode plates, M
≥2；Wherein, the interval S of adjacent lug in the width of n-th of cutting die, with n-th group lugnIt is identical, and adjacent lug in n-th group
In latter lug width be more than previous lug width；And to be in identical row in each group lug of each electrode plates
The size of the lug of row order is identical and position after the coiling corresponds to overlapping；
When manufacturing the M group lugs of the electrode plates, since n=1, cycle executes step A ~ E：
A, it is equal to interval S using widthnCutting die, cycle execute step a ~ e, to manufacture all lugs in n-th group；
B, judge whether the numerical value of n is equal to M：If being equal to M, the cycle of step A ~ E is jumped out；If being less than M, step C is continued to execute；
C, electrode plates is made to move the width L of the last one lug in n-th group along tape transport direction；
D, it is equal to interval S using widthn+1Next cutting die, away from the last one lug front end of n-th group distance be L position
Carry out punching press；
E, n=n+1 is enabled；
Wherein, to same group of lug of the electrode plates, the same cutting die punching press is used；The width W of the cutting die and this
The interval S of adjacent lug is identical in group, and the width of latter lug in the adjacent lug in this group is made to be more than previous lug
Width；
When manufacturing any one group of lug of the electrode plates, since i=1, cycle executes step a ~ e：
A, electrode plates is made to be moved and the i-th lug width L along tape transport directioniEqual distance；
B, away from the i-th lug front end LiPlace uses the cutting die punching press that width is W；
C, make electrode plates along tape transport direction move with cutting die width W it is equal at a distance from；
D, i=i+1 is enabled；
E, numerical value i=i+1 of judgment step d whether be more than this group of lug setting quantity：If being more than, cycle is jumped out；If not surpassing
It crosses, then executes the step a of subsequent cycle with numerical value i=i+1 of step d.
7. the manufacturing method of coiled lithium ion battery lug as claimed in claim 6, which is characterized in that
The electrode plates are any one electrode plates in first electrode pole piece or second electrode pole piece；First electrode pole piece
With second electrode pole piece to stack direction identical as tape transport direction；Wherein, the first electrode pole piece is anode pole piece, described
Two electrode plates are cathode pole pieces；Alternatively, the first electrode pole piece is cathode pole piece, the second electrode pole piece is positive pole
Piece；
In the manufacturing method, further will successively fold set first electrode pole piece, first layer diaphragm, second electrode pole piece,
Second layer diaphragm is wound to few two circle around core；
In any one group of each electrode plates after the coiling, latter lug in adjacent lug previous lug it is latter
Circle is Chong Die with the previous lug, and the first end of latter lug is made to be staggered in terrace type with the first end of previous lug, and latter
The second end of lug is aligned with the second end of previous lug；
For the first end of each lug close to the medium position for separating first electrode pole piece and second electrode pole piece, second end is separate
The medium position.
8. the manufacturing method of coiled lithium ion battery lug as claimed in claim 7, which is characterized in that
By computer-aided design system, precalculate in each electrode plates between each group of each lug width and adjacent lug
Away from, and calculate the spacing of two adjacent groups lug in each electrode plates；
Further according to the result of calculation of computer-aided design system, to move the electrode plates to the tape transport control device
It walks strip length and tape transport direction is controlled.
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| CN201610630031.4A CN106058137B (en) | 2016-08-03 | 2016-08-03 | A kind of coiled lithium ion battery lug and its manufacturing method |
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| CN110085920A (en) * | 2018-01-26 | 2019-08-02 | 上海瑞浦青创新能源有限公司 | Multi pole ears coiled lithium ion battery pole piece and preparation method thereof |
| CN108808114A (en) * | 2018-05-29 | 2018-11-13 | 江苏海基新能源股份有限公司 | A kind of rectangular multi pole ears wound lithium-ion battery assembly method |
| CN108461829B (en) * | 2018-07-20 | 2018-11-02 | 上海瑞浦青创新能源有限公司 | A kind of battery core of coiled lithium ion battery |
| CN108461811B (en) * | 2018-07-20 | 2019-11-05 | 瑞浦能源有限公司 | Pole piece and battery cell for coiled lithium ion battery |
| WO2020015362A1 (en) * | 2018-07-20 | 2020-01-23 | 瑞浦能源有限公司 | Electrode plate and battery cell of wound lithium-ion battery and method for manufacturing same |
| CN114975864A (en) * | 2021-02-23 | 2022-08-30 | 北京小米移动软件有限公司 | Pole piece, electric core structure, lithium battery and electronic equipment |
| CN113517472B (en) * | 2021-03-18 | 2022-12-23 | 河南鑫泉能源科技有限公司 | Alignment method for positive and double-pole ears of cylindrical lithium ion battery |
| CN221508426U (en) * | 2021-11-26 | 2024-08-09 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electricity utilization device |
| CN117476868A (en) * | 2023-12-27 | 2024-01-30 | 瑞浦兰钧能源股份有限公司 | Pole piece of winding type battery, die cutting method of pole piece, battery core and battery |
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| CN101714624A (en) * | 2009-09-11 | 2010-05-26 | 广州丰江电池新技术股份有限公司 | Spiral-line multi-pole lug lithium ion battery and method for manufacturing same |
| JP5699909B2 (en) * | 2011-11-11 | 2015-04-15 | 株式会社豊田自動織機 | Secondary battery electrode body, secondary battery and vehicle |
| CN202434631U (en) * | 2012-02-16 | 2012-09-12 | 浙江兴海能源科技有限公司 | Differential pitch pole piece and power battery using same |
| CN102569721B (en) * | 2012-02-16 | 2014-04-23 | 浙江兴海能源科技有限公司 | Difference pitch pole pieces and power battery adopting difference pitch pole pieces |
| CN204809298U (en) * | 2015-06-30 | 2015-11-25 | 宁德时代新能源科技有限公司 | Battery tab former |
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