CN1929186A - Reeling method for reel type secondary lithium ion battery - Google Patents
Reeling method for reel type secondary lithium ion battery Download PDFInfo
- Publication number
- CN1929186A CN1929186A CNA2005100370885A CN200510037088A CN1929186A CN 1929186 A CN1929186 A CN 1929186A CN A2005100370885 A CNA2005100370885 A CN A2005100370885A CN 200510037088 A CN200510037088 A CN 200510037088A CN 1929186 A CN1929186 A CN 1929186A
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- Prior art keywords
- pole piece
- barrier film
- winding
- secondary lithium
- lithium ion
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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
This invention relates to secondary lithium ion battery field and to one rolling method of one chip rolling, which comprises the following steps: a, overlapping positive and negative electros and isolation film, wherein, positive electrode is in middle and isolation film on top and bottom with isolation film inside; b, folding the overlapped electrodes and isolation films by positive electrode.
Description
Technical field:
The present invention relates to the secondary lithium battery field, the method for winding that to refer in particular to a kind of electric core be coiled secondary lithium battery.
Background technology:
Along with the development of modern society, small type mobile devices such as video camera, mobile DVD and notebook computer are universal day by day, and these mobile devices are because function is more and more, and are also more and more higher to the energy requirement of portable power source.Because the operating voltage height of secondary lithium battery, the energy density height pollutes advantage such as little and has caused extensive interest, obtained application widely, but the internal resistance of coiled secondary lithium ion battery is bigger, and high-rate discharge ability is poor.For the problem of improving secondary cell high-rate discharge ability aspect, though equaling the publication number of application in 2003 at Pan Hongge is to mention in the patent of CN1445879A, on anode plate, be provided with the high-rate discharge ability that two or more lugs can obviously improve secondary cell, but its shortcoming be not consider cathode pole piece to the influence of high-rate discharge ability and in secondary lithium battery the ratio problem of capacity of negative plates and positive electrode capacity.And be that a end by pole piece begins to reel in the winding process of traditional secondary lithium battery since pole piece length grow make in winding process negative electrode pole piece, anode pole piece and barrier film between to the bit comparison difficulty.
Summary of the invention:
Purpose of the present invention overcomes the existing deficiency of present product exactly, and a kind of coiled secondary lithium ion battery method for winding is provided.
The technical solution adopted in the present invention is:
At first, with anode pole piece, cathode pole piece and barrier film superpose successively, and wherein, in the middle of anode pole piece was positioned at, barrier film was positioned at its two ends up and down, and two cathode pole pieces are positioned at the two ends up and down of barrier film, and lay respectively at the left and right sides;
Secondly, the anode pole piece that above-mentioned stack is good, cathode pole piece and barrier film are begun to reel by the centre of anode pole piece.
A plurality of lugs or soldering polar ear not can be welded in lug welding clear area therebetween of described anode pole piece in other places; Article two, one or more negative lug corresponding with positive pole ear are respectively arranged on the cathode pole piece.
Perhaps, with anode pole piece and cathode pole piece transposing, get final product by reeling in the middle of the cathode pole piece.
Anode pole piece of the present invention and cathode pole piece can be used pole piece as reeling from the centre.If in the middle of anodal, reel, a lug need be welded in clear area in the middle of then anodal, a plurality of lugs or soldering polar ear not can be welded in other places, cathode pole piece is two pole pieces that separate, the end position of these two cathode pole pieces all is welded with a lug, a plurality of or soldering polar ear not of the welding that other places can correspondence under the situation of considering anodal and negative pole contraposition; If in the middle of cathode pole piece, reel, then a lug need be welded in the clear area in the middle of cathode pole piece, a plurality of lugs or soldering polar ear not can be welded in other places, anode pole piece is two pole pieces that separate, the end position of these two anode pole pieces all is welded with a lug, and other places are a plurality of lugs of welding or or soldering polar ear not under situation about considering with the anode contraposition.
Method for winding of the present invention is compared with traditional method for winding, has two tangible advantages:
1) in this winding method, secondary lithium battery is in charging and discharging process, electric current flows to the two ends of pole piece from the middle lug of middle coiling pole piece, compare with traditional method for winding, obviously shortened the distance of flowing through of electric current, promptly effectively lower the internal resistance of battery, thereby improved the repid discharge performance of battery.
2) in this winding method, the coiling length of pole piece is equivalent to 1/2 of pole piece length in the conventional roll winding method, effectively raises the contraposition accuracy between anode pole piece in the winding process, cathode pole piece and the barrier film, has improved winding efficiency.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the another kind of structural representation of the present invention;
Fig. 3 is the structural representation of the present invention when reeling;
Fig. 4 is the high-rate discharge ability contrast table that the present invention and traditional approach make battery.
Specific embodiment:
See Fig. 1,2, need anode pole piece 1 among the present invention, cathode pole piece 2 and barrier film 3.Wherein, the position of positive and negative plate 1,2 can exchange.When reeling, at first the centre by the pole piece in the middle of being positioned at began around (as shown in Figure 3), the battery of a last coiling of coiled.
Embodiment: with cobalt acid lithium (LiCoO2), Super-P (acetylene carbon black) with to gather inclined to one side fluorine resin (PVDF) be to be dissolved in N at 85: 5: 10 in proportion, stir in the N-dimethyl pyrrolidone (NMP), and to regulate viscosity with NMP be 3000～4000mpas, the aluminium that slurry is coated on 25um approaches, and makes anode pole piece 1; With CMS (anode graphite a kind of, carbonaceous mesophase spherules or spherical graphite), SBR rubber, CMC (water based adhesive, carboxymethyl cellulose) and Super-P be 85: 8: 4 in proportion: 3 are dissolved in the deionized water, stir, and to regulate viscosity with deionized water be 1000～2000mpas, slurry is coated on the Copper Foil of 20um, makes cathode pole piece 2.
Clear area in the middle of cathode pole piece 2, nickel strap with an electric resistance welding 75*4*0.1 of welding (the wide * height of long *), the aluminium strip of 80*4*0.1 of ultrasonic bonding (the wide * height of long *) is all used in the end position that constitutes 21, two anode pole pieces 1 of negative lug, constitutes positive pole ear 11.Adopt the inventive method to carry out coiling and molding then.Then, following insulation spacer and the electric core of spooling are put into 18650 box hats, with nickel strap and box hat welding, put into the top insulation spacer then, slot rolling with electric resistance welding, and electric core carried out vacuumize, fluid injection is welded on positive pole ear 11 on the cap assembly with laser welding again, seals, change into, promptly finish after partial volume and the cover thermoplastic tube.
Below be the foregoing description with adopt present method make the contrast form (employing) of like product with same recipe and size
The efficient contrast of these two kinds of method for winding (artificial reel), as table 1:
The different winding methods of table 1 (the artificial coiling) winding efficiency table
| Time (hour) | The electric core quantity (individual) of tradition winding method | The electric core quantity (individual) that the present invention reels |
| 1 | 30～32 | 38～42 |
Different method for winding make the internal resistance contrast of battery, as table 2:
The internal resistance table of the different method for winding of table 2 battery then
Two kinds of winding methods make the high-rate discharge ability contrast of battery and see shown in Figure 4.
Claims (4)
1, a kind of method for winding of coiled secondary lithium ion battery is characterized in that:
At first, with anode pole piece (1), cathode pole piece (2) and barrier film (3) superpose successively, wherein, in the middle of anode pole piece (1) was positioned at, barrier film (3) was positioned at its two ends up and down, two cathode pole pieces (2) are positioned at the two ends up and down of barrier film (3), and lay respectively at the left and right sides;
Secondly, the anode pole piece that above-mentioned stack is good (1), cathode pole piece (2) and barrier film begin to roll up rich by the centre of anode pole piece (1).
2, the method for winding of the described a kind of coiled secondary lithium ion battery of claim 1 is characterized in that: lug welding clear area therebetween of described anode pole piece (1), can weld a plurality of lugs or soldering polar ear not in other places; Article two, one or more negative lug (21) corresponding with positive pole ear (11) are respectively arranged on the cathode pole piece (2).
3, a kind of method for winding of coiled secondary lithium ion battery is characterized in that:
At first, with anode pole piece (1), cathode pole piece (2) and barrier film (3) superpose successively, wherein, in the middle of cathode pole piece (2) was positioned at, barrier film (3) was positioned at its two ends up and down, two anode pole pieces (1) are positioned at the two ends up and down of barrier film (3), and lay respectively at the left and right sides;
Secondly, the anode pole piece that above-mentioned stack is good (1), cathode pole piece (2) and barrier film are begun to reel by the centre of cathode pole piece (1).
4, the method for winding of the described a kind of coiled secondary lithium ion battery of claim 1 is characterized in that: lug welding clear area therebetween of described cathode pole piece (1), can weld a plurality of lugs or soldering polar ear not in other places; Article two, one or more positive pole ears (11) corresponding with negative lug (21) are respectively arranged on the anode pole piece (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100370885A CN1929186A (en) | 2005-09-09 | 2005-09-09 | Reeling method for reel type secondary lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100370885A CN1929186A (en) | 2005-09-09 | 2005-09-09 | Reeling method for reel type secondary lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1929186A true CN1929186A (en) | 2007-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100370885A Pending CN1929186A (en) | 2005-09-09 | 2005-09-09 | Reeling method for reel type secondary lithium ion battery |
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| CN (1) | CN1929186A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637906A (en) * | 2012-04-06 | 2012-08-15 | 宁德新能源科技有限公司 | Preparation method of winding-structure lithium ion battery |
| CN102637846A (en) * | 2011-02-11 | 2012-08-15 | 三星Sdi株式会社 | Electrode assembly and secondary battery using the same |
| CN112534624A (en) * | 2018-07-20 | 2021-03-19 | 株式会社Lg化学 | Electrode assembly and secondary battery including the same |
| EP3817123A4 (en) * | 2018-07-20 | 2022-04-27 | LG Energy Solution, Ltd. | Electrode assembly and rechargeable battery comprising same |
-
2005
- 2005-09-09 CN CNA2005100370885A patent/CN1929186A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637846A (en) * | 2011-02-11 | 2012-08-15 | 三星Sdi株式会社 | Electrode assembly and secondary battery using the same |
| US9172109B2 (en) | 2011-02-11 | 2015-10-27 | Samsung Sdi Co., Ltd. | Electrode assembly and secondary battery using the same |
| CN102637846B (en) * | 2011-02-11 | 2016-03-16 | 三星Sdi株式会社 | The secondary cell of electrode assemblie and this electrode assemblie of use |
| CN102637906A (en) * | 2012-04-06 | 2012-08-15 | 宁德新能源科技有限公司 | Preparation method of winding-structure lithium ion battery |
| CN102637906B (en) * | 2012-04-06 | 2015-01-07 | 宁德新能源科技有限公司 | Preparation method of winding-structure lithium ion battery |
| CN112534624A (en) * | 2018-07-20 | 2021-03-19 | 株式会社Lg化学 | Electrode assembly and secondary battery including the same |
| EP3817123A4 (en) * | 2018-07-20 | 2022-04-27 | LG Energy Solution, Ltd. | Electrode assembly and rechargeable battery comprising same |
| CN112534624B (en) * | 2018-07-20 | 2024-01-26 | 株式会社Lg新能源 | Electrode assembly and secondary battery including the same |
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Open date: 20070314 |