CN103762387B - Method for preparing coiled polymer lithium battery and coiled polymer lithium battery - Google Patents
Method for preparing coiled polymer lithium battery and coiled polymer lithium battery Download PDFInfo
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- CN103762387B CN103762387B CN201410035580.8A CN201410035580A CN103762387B CN 103762387 B CN103762387 B CN 103762387B CN 201410035580 A CN201410035580 A CN 201410035580A CN 103762387 B CN103762387 B CN 103762387B
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- positive plate
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- lithium battery
- polymer lithium
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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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- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a method for preparing a coiled polymer lithium battery and the coiled polymer lithium battery. The coiled polymer lithium battery comprises a packaging shell and a coiled body assembled in the packaging shell, wherein the coiled body comprises a diaphragm, a positive plate and a negative plate; the positive plate and the negative plate are separated through the diaphragm and are coiled into a certain number of turns; a positive tab and a negative tab are respectively welded at the ends of the positive plate and the negative plate; the exposed end of the positive tab is perpendicular to the width direction of the positive plate; the exposed end of the negative tab is perpendicular to the width direction of the negative plate. Compared with the coiled polymer lithium battery and inner structures of positive and negative plates thereof in the prior art, the coiled polymer lithium battery in the invention has the advantages that spot welding mode and position of the tabs are adjusted, a winding structure of a battery cell is changed, the offset of the central distance between the tabs is reduced, the surfaces of the coiling layer face the airbag, the time of introducing the electrolyte into the winding core is shortened, rapid absorption of the electrolyte is promoted, and the standing time after liquid injection is reduced.
Description
Technical field
The present invention relates to lithium ion battery, particularly to a kind of preparation method of coiled type polymer lithium battery and takeup type
Poly-lithium battery.
Background technology
Soft bag lithium ionic cell is lightweight, the advantages of have a safety feature, therefore bluetooth, 2G/3G mobile phone, notebook computer,
The application in the field such as the mobile electronic devices such as panel computer, video camera and Portable power source is increasingly extensive, especially its
Excellent security performance is so as to replace aluminum hull or the lithium-ion battery with steel shell of liquid more and more.
Polymer Li-ion battery can be made to measure because of it（Overall dimensions arbitrarily customize）Although, energy density high poly-
Compound lithium ion battery has good safety, but, coiled mechanism there is also certain defect, note night after winding
Battery core, directly facing note night mouth, electrolyte needs to bypass pole piece face and penetrates into from winding aspect that core is internal and pole piece in pole piece face
Inside is gone, and needs considerable time standing it is ensured that the fully absorbing of electrolyte after note night.For less narrower battery, when
Overall dimensions are less, and lug centre-to-centre spacing controls and becomes a big difficult problem.Therefore, prior art still has much room for improvement and develops.
Content of the invention
It is an object of the invention to provide a kind of new preparation method of coiled type polymer lithium battery and realize above-mentioned
The coiled type polymer lithium battery of method.
According to an aspect of the present invention, there is provided a kind of preparation method of coiled type polymer lithium battery, walk including following
Suddenly：
（1）, the preparation positive plate of flat and negative plate, anode ear, negative electrode lug and barrier film；
（2）, first barrier film is wound around a circle, then the top of negative plate is placed between above-mentioned barrier film, then again by positive plate
Top put into, and negative plate is separated by barrier film with positive plate, then by negative plate, barrier film and positive plate mutually wound on one
Rise, obtain the coiling body of the naked battery core of coiled type polymer lithium battery；
（3）, anode ear is welded on the position of positive plate ending, and vertical with positive plate width, in the same manner by negative pole
Ear is welded on the position of negative plate ending, and vertical with negative plate width；
（4）, finally coiling body is assemblied in pack case, and be packaged successively, be vacuum dried, note night, sealing, change
One-tenth, partial volume, inspection, obtain coiled type polymer lithium battery.
Particularly, step（2）Also include as follows：Leave a blank in advance paper tinsel position at the top of described positive plate and ending position, empty
Conjunction is stained with using green glue in paper tinsel position.
Particularly, step（3）Also include as follows：Described positive plate, the ending of negative plate stretch out the volume of direction and coiling body
Around direction in the same direction.
Particularly, step（3）Also include as follows：The welding position of anode ear is near the edge of positive plate, the weldering of negative electrode lug
Connect the half that position deducts positive plate width with a distance from negative plate edge for negative plate width.
Particularly, step（4）Also include as follows：When coiling body is assemblied in pack case, the number of plies of coiling body faces fluid injection gas
Pouch position.
A kind of coiled type polymer lithium battery of said method, including pack case and be assemblied in the winding in pack case
Body, described coiling body includes barrier film, positive plate and negative plate, and described positive plate and negative plate are separated by barrier film and wind one
The fixed number of turns, is respectively welded anode ear and negative electrode lug, the dew of described anode ear at the ending with negative plate for the described positive plate
Go out to hold vertical with the width of described positive plate, the bared end of described negative electrode lug is vertical with the width of described negative plate.
Particularly, the top of anode ear and trailing end are provided with blank foil, and are fixed blank foil by green glue.
Particularly, the edge of positive plate is leaned in the welding position of anode ear, and the welding position of described negative electrode lug is from negative plate side
The distance of edge deducts the half of positive plate width for negative plate width.
Particularly, positive plate, the ending of negative plate stretch out the coiling direction of direction and coiling body in the same direction, anode ear and negative pole
The ending of ear is all in the corner of coiling body.
Particularly, positive plate is made using cobalt acid lithium, LiMn2O4, ternary material and LiFePO 4 material, described negative plate
The pole piece made for graphite material.
The invention has the beneficial effects as follows：Inside with coiled type polymer lithium battery of the prior art and its positive/negative plate
Structure is compared, and adjusts lug spot welding mode and position, changes the winding-structure of battery core, reduces the deviation of lug centre-to-centre spacing, core
Number of plies face direction, towards gasbag position, is shortened the time within electrolyte entrance core, is conducive to the quick absorption of electrolyte, subtracts
Time of repose after note night less.
Brief description
Fig. 1 is a kind of coiled type polymer lithium battery cross section structure schematic diagram of the present invention.
Fig. 2 is the structural representation of the coiled type polymer lithium battery of Fig. 1.
Specific embodiment
The present invention is further detailed explanation below in conjunction with the accompanying drawings.
Fig. 1 to Fig. 2 show schematically show a kind of coiled type polymer lithium battery according to the present invention.
According to an aspect of the present invention, there is provided a kind of preparation method of coiled type polymer lithium battery, walk including following
Suddenly：
（1）, the preparation positive plate 003 of flat and negative plate 002, anode ear 005, negative electrode lug 006 and barrier film 001；
（2）, such as Fig. 1 first pass through volume pin and barrier film 001 be wound around a circle, then the top of negative plate 002 is placed in above-mentioned barrier film
Between 001, then again the top of positive plate 003 is put into, and negative plate 002 is separated by barrier film 001 with positive plate 003, wherein
Leave a blank in advance paper tinsel position at the top of described positive plate 003 and ending position, empty paper tinsel position is stained with conjunction using green glue 004, is prevented negative electrode head
Portion's burr pierces through barrier film 001 and positive contact short circuit, then winds negative plate 002, barrier film 001 and positive plate 003 certain
The number of turns, and its number of turns obtains the coiling body of the naked battery core of coiled type polymer lithium battery, special instruction is the number of turns of winding at this
In and be not especially limited, this number of turns can be adjusted according to practical situation should not be used as limiting the condition of the inventive method；
（3）, as shown in Fig. 2 anode ear 005 is welded on the position that positive plate 003 finishes up, and with positive plate 003 width
Direction is vertical, and negative electrode lug 006, near the edge of positive plate 003, is welded on negative plate by the welding position of anode ear 005 in the same manner
The position of 002 ending, and vertical with negative plate 002 width, and the welding position of negative electrode lug 006 is from negative plate 002 edge
Distance deducts the half of positive plate 003 width for negative plate 002 width, and above-mentioned positive plate 003, the ending of negative plate 002 are stretched
The coiling direction of outgoing direction and coiling body is in the same direction；
（4）, finally coiling body is assemblied in pack case, the number of plies of coiling body faces fluid injection gasbag position, and successively
It is packaged, is vacuum dried, noting night, sealing, chemical conversion, partial volume, inspection, obtaining coiled type polymer lithium battery.
A kind of coiled type polymer lithium battery of said method, including pack case and be assemblied in the winding in pack case
Body, described coiling body includes barrier film 001, positive plate 003 and negative plate 002, and described positive plate 003 and negative plate 002 pass through
Barrier film 001 separates and winds certain number of turns, is respectively welded positive pole at the ending with negative plate 002 for the described positive plate 003
Ear 005 and negative electrode lug 006, the bared end of described anode ear 005 is vertical with the width of described positive plate 003, anode ear 005
Welding position lean on the edge of positive plate 003, the width of the bared end of described negative electrode lug 006 and described negative plate 002 hangs down
Directly, the welding position of described negative electrode lug 006 deducts positive plate 003 width for negative plate 002 width with a distance from negative plate 002 edge
The half of degree, specifically positive plate 003, the ending of negative plate 002 stretch out the coiling direction of direction and coiling body in the same direction, positive pole
The ending of ear 005 and negative electrode lug 006 all in the corner of coiling body, is respectively provided with free at the top of anode ear 005 and trailing end
White paper tinsel, and by green glue 004, blank foil is fixed.
Cobalt acid lithium, LiMn2O4, ternary material and LiFePO 4 material can be adopted any one by positive plate 003 in the present embodiment
Kind of material is made, the pole piece that described negative plate 002 is made for graphite material, certain it should be noted that material mentioned herein
Be only a kind of schematically to illustrate, using the material of equal function replace above-mentioned material also can be considered protection scope of the present invention it
Interior.
The invention has the beneficial effects as follows：With coiled type polymer lithium battery of the prior art and its positive/negative plate 002
Internal structure is compared, and adjusts lug spot welding mode and position, changes the winding-structure of battery core, reduces the deviation of lug centre-to-centre spacing,
Core number of plies face direction, towards gasbag position, is shortened the time within electrolyte entrance core, is conducive to the quick suction of electrolyte
Receive, time of repose after reducing note night.
Finally it should be noted that above example is only in order to illustrating technical scheme, rather than the present invention is protected
The restriction of shield scope, although having made to explain to the present invention with reference to preferred embodiment, those of ordinary skill in the art should
Work as understanding, technical scheme can be modified or equivalent, without deviating from the reality of technical solution of the present invention
Matter and scope.
Claims (6)
1. a kind of preparation method of coiled type polymer lithium battery is it is characterised in that comprise the steps：
(1), the positive plate of preparation flat and negative plate, anode ear, negative electrode lug and barrier film；
(2), first barrier film is wound around a circle, then the top of negative plate is placed between above-mentioned barrier film, then again by the beginning of positive plate
End is put into, and negative plate is separated by barrier film with positive plate, then negative plate, barrier film and positive plate are mutually wound together with, obtain
Coiling body to the naked battery core of coiled type polymer lithium battery；Leave a blank in advance paper tinsel position at the top of described positive plate and ending position,
Conjunction is stained with using green glue in empty paper tinsel position；
(3), anode ear is welded on the position of positive plate ending, and vertical with positive plate width, in the same manner negative electrode lug is welded
It is connected on the position of negative plate ending, and vertical with negative plate width；Described positive plate, the ending of negative plate stretch out direction with
The coiling direction of coiling body is in the same direction；Near the edge of positive plate, the welding position of negative electrode lug is from negative pole for the welding position of anode ear
The distance at piece edge deducts the half of positive plate width for negative plate width；
(4), finally coiling body is assemblied in pack case, and is packaged successively, is vacuum dried, note night, sealing, chemical conversion, divide
Hold, check, obtain coiled type polymer lithium battery；When coiling body is assemblied in pack case, the number of plies of coiling body faces fluid injection air bag
Bag position.
2. the coiled type polymer lithium electricity of a kind of preparation method of coiled type polymer lithium battery realized described in claim 1
Pond is it is characterised in that including pack case and be assemblied in coiling body in pack case, described coiling body including barrier film, positive plate
And negative plate, described positive plate and negative plate are separated by barrier film and wind certain number of turns, in described positive plate and negative pole
It is respectively welded anode ear and negative electrode lug, the bared end of described anode ear is hung down with the width of described positive plate at the ending of piece
Directly, the bared end of described negative electrode lug is vertical with the width of described negative plate.
3. coiled type polymer lithium battery according to claim 2 is it is characterised in that the top of described anode ear and ending
End is provided with blank foil, and is fixed blank foil by green glue.
4. coiled type polymer lithium battery according to claim 2 is it is characterised in that the welding position of described anode ear is leaned on
The edge of positive plate, the welding position of described negative electrode lug deducts positive plate width for negative plate width with a distance from negative plate edge
Half.
5. coiled type polymer lithium battery according to claim 2 is it is characterised in that the receipts of described positive plate, negative plate
Tail stretches out the coiling direction of direction and coiling body in the same direction, and the ending of anode ear and negative electrode lug is all in the corner of coiling body.
6. coiled type polymer lithium battery according to claim 2 it is characterised in that described positive plate adopt cobalt acid lithium,
LiMn2O4, ternary material or LiFePO 4 material are made, the pole piece that described negative plate is made for graphite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035580.8A CN103762387B (en) | 2014-01-24 | 2014-01-24 | Method for preparing coiled polymer lithium battery and coiled polymer lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035580.8A CN103762387B (en) | 2014-01-24 | 2014-01-24 | Method for preparing coiled polymer lithium battery and coiled polymer lithium battery |
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| Publication Number | Publication Date |
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| CN103762387A CN103762387A (en) | 2014-04-30 |
| CN103762387B true CN103762387B (en) | 2017-02-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979584B (en) * | 2015-06-15 | 2017-06-30 | 钟其勇 | Polymer Li-ion battery and its processing technology |
| CN106935791A (en) * | 2017-02-08 | 2017-07-07 | 东莞市迈科新能源有限公司 | A kind of electrolyte filling method of flexible-packed battery |
| CN109361010A (en) * | 2018-12-08 | 2019-02-19 | 广东维都利新能源有限公司 | A kind of discoid poly-lithium battery of takeup type and preparation method thereof |
| CN113851651A (en) * | 2021-08-10 | 2021-12-28 | 宁波维科电池有限公司 | High-hardness lithium ion battery and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201364931Y (en) * | 2008-12-29 | 2009-12-16 | 深圳市邦凯电子有限公司 | Battery cell and battery |
| CN102208590A (en) * | 2011-05-04 | 2011-10-05 | 合肥国轩高科动力能源有限公司 | Method for controlling burrs at head and tail parts of battery pole piece |
-
2014
- 2014-01-24 CN CN201410035580.8A patent/CN103762387B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201364931Y (en) * | 2008-12-29 | 2009-12-16 | 深圳市邦凯电子有限公司 | Battery cell and battery |
| CN102208590A (en) * | 2011-05-04 | 2011-10-05 | 合肥国轩高科动力能源有限公司 | Method for controlling burrs at head and tail parts of battery pole piece |
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| CN103762387A (en) | 2014-04-30 |
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Effective date of registration: 20180427 Address after: 516100 4, 5, 6 workshop of Xin Wanda Industrial Park, Dongpo Avenue, Yuanzhou Town, Boluo, Huizhou, Guangdong Patentee after: Huizhou Li Wei Amperex Technology Limited Address before: 523000 No. 1 workshop of Tangxia Village Industrial Zone, Gao Gao town, Dongguan, Guangdong Patentee before: DONGGUAN LIWINON ENERGY TECHNOLOGY CO., LTD. |
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