CN1750295A - Folding lithium ion battery polar group and its producing method - Google Patents
Folding lithium ion battery polar group and its producing method Download PDFInfo
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- CN1750295A CN1750295A CNA2005100154941A CN200510015494A CN1750295A CN 1750295 A CN1750295 A CN 1750295A CN A2005100154941 A CNA2005100154941 A CN A2005100154941A CN 200510015494 A CN200510015494 A CN 200510015494A CN 1750295 A CN1750295 A CN 1750295A
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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
Abstract
This invented ionic battery pole group includes strip-like negative pole plates, multiple sheet positive pole plates, membranes, ears of positive and the negative poles, in which, the hems at one end of the negative plates are fixed to a lamination state, the positive plates are set at the folded place of the negative and their collectors are fixed together, the lamination is even, a positive pole plate covered by the membrane is set at each folded place, the ear of the negative is fixed on the collector of the negative, the ear of the positive is fixed at the collector of any positive pole plate and the entire group is wrapped by a membrane. This invention also provides a manufacturing method for the pole group, which solves the problem of positioning of the pole plates and their alignment.
Description
Technical field
The present invention relates to a kind of lithium ion battery, especially relate to a kind of utmost point group of lithium ion battery.
Background technology
The making of battery utmost point group is the basic step that battery is made, and directly has influence on the performance of battery.The making of battery utmost point group mainly contains takeup type and stacked technology.These two kinds of technology all can manual production, also can realize the big production of automation, and these two kinds of technology all also are present in the production of battery now; Stacked since realized automation and with takeup type the operation on become similar; Coiled battery and stacked battery do not have too big difference in appearance, and difference are arranged at electrical property on for example as security performance, but are the same as commercial battery to the requirement of its electrical property, and all should satisfy existing safety standard.
The making of coiled battery is earlier positive/negative plate and barrier film to be cut into strip, then with certain instrument craft or machine rolls coiled utmost point group; It is earlier positive/negative plate to be cut into sheet that stacked battery is made, and the positive/negative plate that separates with barrier film overlaps together again, does the poling group; Stacked battery also can be made substrate, substrate is built up bigger utmost point group again.Above utmost point group manufacturing technology is not too big difference when the little coating amount of electrode, but when the electrode coating amount is big, the easy broken belt of takeup type pole piece, and stacked with regard to the no this item weakness.But pole piece location and the pole piece degree of registration of stacked battery when lamination is very big problem, and the High Accuracy Control when production of machinery can be accomplished this point, but is difficult to guarantee when manual operations, and the difficulty that causes utmost point group to make.In addition, drawing of the afflux of stacked utmost point group and lug can take than large space, and the capacity to battery will have considerable influence like this.
Summary of the invention
The present invention is in order to solve the utmost point group making under the high coating amount and to propose a kind of lithium ion cell electrode group and manufacture method, to overcome craft and the production of machinery unmanageable problem to the pole piece degree of registration.
The present invention adopts following utmost point group structure:
Ion battery utmost point group of the present invention comprises the negative plate of strip and the positive plate of multi-disc sheet, barrier film, and positive pole ear, negative lug, negative plate one end flanging is fixed, and is laminated; Burst at negative plate is provided with positive plate, and the collector of each sheet positive plate is fixed together; Be provided with barrier film between negative plate and the positive plate; Negative lug is fixed on the collector of negative plate, and positive pole ear is fixed on the collector of any a slice positive plate; Whole utmost point group outside is coated with barrier film.
The lamination of negative plate is preferably even number, and every place burst is provided with a slice outside and coats septate positive plate.
For finishing the making of above-mentioned lithium ion cell electrode group structure, the present invention also proposes following manufacture method:
(1) makes negative plate and positive plate;
(2) negative plate is cut into strip;
(3) positive plate is cut into the multi-disc sheet;
(4) fixing negative lug on the collector of negative plate;
(5) fixing positive pole ear on the collector of any a slice positive plate;
(6) coat every positive plate with barrier film, and reserve the collector of each the sheet positive plate that is not coated; Perhaps coat negative plate, and reserve the collector of the negative plate that is not coated with barrier film;
(7) flanging of negative pole one end is located, folding then negative pole inserts positive plate in its burst;
(8) behind folding the finishing, encase utmost point group and make it fixing with barrier film;
(9) collector with every positive plate is fixed together.
In the above-mentioned manufacture method, the operation of some making step is adjustable.It is inferior folding that preferably anticathode carries out even number, inserts the positive plate that a slice coats barrier film in each burst.
Adopt utmost point group structure of the present invention and manufacture method, bring following beneficial effect:
1, is suitable for manual operations, also applicable to automatic technology;
2, easier than traditional takeup type manufacture method, the operative employee does not need special training;
3, coiled existing equipment can be utilized, equipment need not be increased;
4, compare with traditional takeup type manufacture method, be not easy to take place broken belt, be applicable to that more the utmost point group of big coating amount is made, can improve the electrode coating amount, and then improve battery capacity, be specially adapted to the polymer battery of big pole plate;
5, improve the utilance of positive plate;
6, compare with the stacked battery manufacture method of manual method, solved the problem of pole piece location and pole piece alignment difficulty, simplified utmost point group manufacture difficulty;
7, the lug vestige is not obvious;
8, compare with stacked battery, it is equally easy that pole piece calculates, and design difficulty reduces greatly.
Description of drawings
Fig. 1 lithium ion cell electrode group is made exploded view
Fig. 2 lithium ion cell electrode group overall structure figure
The 2C cycle graph of the SP383562 battery of Fig. 3 different capabilities
Embodiment
The present invention is described in further detail with embodiment with reference to the accompanying drawings below.
The electrode of lithium ion battery since the specific capacity of negative pole graphite much larger than anodal LiCoO
2Specific capacity, be positive plate so high coating amount bottom electrode can not the enhancing of coiling property, and the coiling of negative plate is no problem, therefore, what the present invention at first considered is that positive plate is carried out lamination, the utmost point group making pattern that negative plate is constant.It is infeasible that but negative plate is reeled, because anodal like this size meeting heterogeneity, the making of such positive plate has a lot of difficulties, and even now can make the orientation problem of positive plate be solved.Thereby negative plate of the present invention adopts folding mode.
Referring to Fig. 1 and Fig. 2, utmost point group 3 of the present invention applies negative material in Copper Foil 4 outsides and makes negative plate 9, is coated with coated positive pole material in aluminium foil 5 outsides and makes positive plate 10.Negative plate 9 is a strip, and positive plate 10 is a plurality of monolithics, and the outside of every positive plate 10 is coated with barrier film, and the bottom is reserved with aluminium foil 5.Negative plate 9 one end flangings are fixed, and are laminated, and lamination is an even number, inserts positive plate 10 in the burst of each negative plate 9.The aluminium foil 5 of each sheet positive plate 10 is together soldered at three solder joint places, and negative lug 1 is welded on the Copper Foil 4 of first folding negative plate 9, and positive pole ear is welded on the aluminium foil 5 of positive plate 10 of positive plate 10 of first insertion; The outside of whole utmost point group is a negative pole, and the outside also is coated with one deck barrier film.
Adopt following manufacture method: negative pole adopts even number time folding collapsible mode, can carry out folding for the first time so that negative pole flanging location at the folding initial stage of negative pole like this.10 bursts at two negative poles of positive plate are inserted, and have also solved positive plate 10 orientation problems, and barrier film will encase positive plate 10 in advance certainly.Such utmost point group outside is a negative pole, fixes with the termination adhesive tape after encasing utmost point group with barrier film at last.Anodal afflux can be in the side or the bottom of negative plate 9, and positive plate 10 reserves aluminium foil 5, welds together through supersonic welding and carries out afflux.Negative lug 1 still resembles makes the takeup type, and positive pole ear also is welded on the anodal lamination in advance, and decide according to the lug spacing and the position that define in the position of lug packaging plastic and the battery specifications position of both positive and negative polarity lug.
The polymer battery model 383562 of producing with the refreshing company of power is an example, adopts method of the present invention to make the utmost point group of flexible-packed battery.Except utmost point group, other making step is with the making of flexible-packed battery.Fig. 3 is seen in the 2C circulation of flexible-packed battery of adopting method of the present invention to make the different capabilities of utmost point group.Institute's test battery model: 383562450mAh, cycling condition: 900mA is to 4.2V in charging; Constant voltage 4.2V, cut-off current 30mA; 900mA is to 3.0V in discharge.
Claims (5)
1, a kind of folding lithium ion battery polar group comprises the negative plate of strip and the positive plate of multi-disc sheet, barrier film, and positive pole ear, negative lug is characterized in that, described negative plate one end flanging is fixed, and is laminated; Burst at negative plate is provided with positive plate, and the collector of each sheet positive plate is fixed together; Be provided with barrier film between described negative plate and the positive plate; Described negative lug is fixed on the collector of negative plate, and described positive pole ear is fixed on the collector of any a slice positive plate; Whole utmost point group outside is coated with barrier film.
2, folding lithium ion battery polar group according to claim 1 is characterized in that, the outside of described positive plate is coated with barrier film, and every positive plate is reserved with the collector that is not coated, and the collector of each sheet positive plate is welded together; The lamination of described negative plate is an even number, and every place burst is provided with a slice outside and coats septate positive plate.
3, folding lithium ion battery polar group according to claim 1 is characterized in that, the outside of described negative plate is coated with barrier film; The lamination of described negative plate is an even number, and every place burst is provided with a slice positive plate, and the collector of each sheet positive plate is welded together.
4, a kind of folding lithium ion battery polar group manufacture method is characterized in that, makes according to following method:
(1) makes negative plate and positive plate;
(2) negative plate is cut into strip;
(3) positive plate is cut into the multi-disc sheet;
(4) fixing negative lug on the collector of negative plate;
(5) fixing positive pole ear on the collector of any a slice positive plate;
(6) coat every positive plate with barrier film, and reserve the collector of each the sheet positive plate that is not coated; Perhaps coat negative plate with barrier film;
(7) flanging of negative pole one end is located, folding then negative pole inserts positive plate in its burst;
(8) behind folding the finishing, encase utmost point group and make it fixing with barrier film;
(9) collector with every positive plate is fixed together.
5, folding lithium ion battery polar group manufacture method according to claim 4 is characterized in that, the anticathode sheet carries out even number and folds, and inserts a slice positive plate in each burst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100154941A CN1750295A (en) | 2005-10-18 | 2005-10-18 | Folding lithium ion battery polar group and its producing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100154941A CN1750295A (en) | 2005-10-18 | 2005-10-18 | Folding lithium ion battery polar group and its producing method |
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| CN1750295A true CN1750295A (en) | 2006-03-22 |
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| CNA2005100154941A Pending CN1750295A (en) | 2005-10-18 | 2005-10-18 | Folding lithium ion battery polar group and its producing method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008074239A1 (en) * | 2006-12-19 | 2008-06-26 | Byd Company Limited | Stacked-type lithium ion battery |
| WO2010149023A1 (en) * | 2009-06-23 | 2010-12-29 | 深圳市比克电池有限公司 | Method for manufacturing wound type battery |
| US8007935B2 (en) | 2006-10-30 | 2011-08-30 | Byd Co., Ltd. | Plate assembly, core and lithium ion battery |
| US8092936B2 (en) | 2007-12-25 | 2012-01-10 | Byd Co. Ltd. | Electrochemical cell having a coiled core |
| US8178230B2 (en) | 2007-12-18 | 2012-05-15 | Byd Co., Ltd. | Battery pack |
| US8178225B2 (en) | 2007-11-29 | 2012-05-15 | Byd Co., Ltd. | Battery and preparation method thereof |
| US8193770B2 (en) | 2007-12-25 | 2012-06-05 | BYD Co. Ltd | Battery system for a vehicle having an over-current/over-temperature protective feature |
| CN102664285A (en) * | 2012-02-27 | 2012-09-12 | 宁德新能源科技有限公司 | Lithium ion battery and combination method of pole pieces thereof |
| US8276695B2 (en) | 2007-12-25 | 2012-10-02 | Byd Co. Ltd. | Battery electrode sheet |
| US8420254B2 (en) | 2007-12-25 | 2013-04-16 | Byd Co. Ltd. | End cover assembly for an electrochemical cell |
| CN103081200A (en) * | 2010-08-11 | 2013-05-01 | 日本自动精机株式会社 | Positive and negative electrode plate stacking method and device |
| CN109449502A (en) * | 2018-09-28 | 2019-03-08 | 天津力神电池股份有限公司 | A kind of preparation method of lithium ion cell electrode group |
-
2005
- 2005-10-18 CN CNA2005100154941A patent/CN1750295A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8007935B2 (en) | 2006-10-30 | 2011-08-30 | Byd Co., Ltd. | Plate assembly, core and lithium ion battery |
| WO2008074239A1 (en) * | 2006-12-19 | 2008-06-26 | Byd Company Limited | Stacked-type lithium ion battery |
| US8178225B2 (en) | 2007-11-29 | 2012-05-15 | Byd Co., Ltd. | Battery and preparation method thereof |
| US8178230B2 (en) | 2007-12-18 | 2012-05-15 | Byd Co., Ltd. | Battery pack |
| US8383257B2 (en) | 2007-12-25 | 2013-02-26 | Byd Co. Ltd. | Electrochemical storage cell with blow out vents |
| US8420254B2 (en) | 2007-12-25 | 2013-04-16 | Byd Co. Ltd. | End cover assembly for an electrochemical cell |
| US8193770B2 (en) | 2007-12-25 | 2012-06-05 | BYD Co. Ltd | Battery system for a vehicle having an over-current/over-temperature protective feature |
| US8202644B2 (en) | 2007-12-25 | 2012-06-19 | Byd Co. Ltd. | Protection cover for an end cap assembly of a battery cell |
| US10381632B2 (en) | 2007-12-25 | 2019-08-13 | Shenzhen Byd Auto R&D Company Limited | Construction of electrochemical storage cell with conductive bridge |
| US8276695B2 (en) | 2007-12-25 | 2012-10-02 | Byd Co. Ltd. | Battery electrode sheet |
| US10147930B2 (en) | 2007-12-25 | 2018-12-04 | Shenzhen Byd Auto R&D Company Limited | Construction of electrochemical storage cell with conductive block |
| US8399116B2 (en) | 2007-12-25 | 2013-03-19 | Byd Co. Ltd. | Optimized dimensional relationships for an electrochemical cell having a coiled core |
| US8404379B2 (en) | 2007-12-25 | 2013-03-26 | Byd Co., Ltd. | Vehicle with a battery system |
| US8092936B2 (en) | 2007-12-25 | 2012-01-10 | Byd Co. Ltd. | Electrochemical cell having a coiled core |
| US9741996B2 (en) | 2007-12-25 | 2017-08-22 | Byd Co. Ltd. | Construction of electrochemical storage cell |
| US8865335B2 (en) | 2007-12-25 | 2014-10-21 | Byd Co. Ltd. | Electrochemical storage cell |
| WO2010149023A1 (en) * | 2009-06-23 | 2010-12-29 | 深圳市比克电池有限公司 | Method for manufacturing wound type battery |
| CN103081200B (en) * | 2010-08-11 | 2015-08-19 | 日本自动精机株式会社 | The lamination method of positive/negative plate and device thereof |
| CN103081200A (en) * | 2010-08-11 | 2013-05-01 | 日本自动精机株式会社 | Positive and negative electrode plate stacking method and device |
| CN102664285A (en) * | 2012-02-27 | 2012-09-12 | 宁德新能源科技有限公司 | Lithium ion battery and combination method of pole pieces thereof |
| CN109449502A (en) * | 2018-09-28 | 2019-03-08 | 天津力神电池股份有限公司 | A kind of preparation method of lithium ion cell electrode group |
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