CN102157754A - Method for winding battery cell of lithium ion - Google Patents
Method for winding battery cell of lithium ion Download PDFInfo
- Publication number
- CN102157754A CN102157754A CN2011100633640A CN201110063364A CN102157754A CN 102157754 A CN102157754 A CN 102157754A CN 2011100633640 A CN2011100633640 A CN 2011100633640A CN 201110063364 A CN201110063364 A CN 201110063364A CN 102157754 A CN102157754 A CN 102157754A
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- winding
- barrier film
- pole piece
- electric core
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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 discloses a method for winding a battery cell of a lithium ion, which comprising the following steps: 1) winding an electrode piece and a membrane to a predetermined thickness; 2) locating an auxiliary winding needle on the surface of the product obtained in the first step; 3) sequentially winding until reaching to a predetermined number of turns; and 4) repeating the second step and the third step until reaching the battery cell to a predetermined size. The method for winding a battery cell of a lithium ion provided by the invention has the advantages that the membrane of a battery cell product has a certain of distortion allowance, and the battery cell can be prevented from deforming caused by the concentration of the membrane.
Description
Technical field
The present invention relates to a kind of method for winding of lithium-ion electric core, especially a kind of method for winding that prevents that electric core from deforming when carrying out subsequent handling.
Background technology
As shown in Figure 1, at present the mode of production of the lithium-ion electric core that forms by coiling is under barrier film keeps the situation of tension force anode strip, cathode sheets and barrier film to be wound up at interval, because barrier film has certain retractility, certain extensional will inevitably occur under the situation that keeps tension stability, the big more extension of tension force is also serious more; The extension of barrier film makes electric in-core portion have certain internal stress, when electric core at high-temperature baking or when carrying out charge and discharge cycles, the internal stress that electric in-core portion stores can progressively discharge, and causes barrier film to occur in the longitudinal direction shrinking.Because positive/negative plate can't shrink, and barrier film is not taked necessary elimination internal stress measure in winding process, so will inevitably cause the distortion of pole piece, the end face of electric core presents " S " type, thereby makes electric core thickening, produces fatal damage.
Summary of the invention
Technical problem to be solved by this invention is, a kind of method for winding of lithium-ion electric core is provided, and overcomes the technical barrier that electric in-core stress guide is sent a telegraph the core distortion.
A kind of method for winding of lithium-ion electric core may further comprise the steps:
1) pole piece and barrier film are wound to preset thickness;
2) will assist the volume pin to be positioned at the surface of the rapid products obtained therefrom of previous step;
3) continue the predetermined number of turns of reeling;
4) repeating said steps 2) and 3) reach predetermined size to electric core.
Described step 1) comprises: step 1-1) in regular turn pole piece and barrier film are folded, and be fixed on the master file pin; 1-2) drive master file pin coiling pole piece and barrier film to preset thickness.
Said method also can utilize auto reeling mechanism to carry out automation and carry out, that is: described step 1) comprises: step 1-3) the material volume with pole piece and barrier film is installed in respectively on the automatic unreeling structure, and the initiating terminal of described pole piece and barrier film is fixed on the master file pin; 1-4) drive automatic unreeling structure pole piece and barrier film are unreeled, drive master file pin coiling pole piece and barrier film to preset thickness.
Preferably, described preset thickness is 4 ~ 5 millimeters.
Preferably, the described master file pin mandrel that is lithium-ion electric core.
Preferably, described auxiliary volume pin is that thickness is that 2 ~ 5 millimeters, width are
~
The semicylinder or the thin slice of electric core width.
The present invention's beneficial effect compared with prior art is: utilize auxiliary volume pin to make in winding process and have the space between the barrier film of electric core and the pole piece, therefore barrier film has the certain deformation surplus, in the charge and discharge process of the baking of electric core and battery, make the contraction of barrier film can not have influence on the shape of pole piece, thereby avoided the end face direction of electric core " S " type to occur, cause electric core thickening, produce fatal damage.
Description of drawings
Fig. 1 is the structural representation of the naked electric core of existing method for winding coiling;
Fig. 2 is the electric core schematic diagram that adds in the electric core winding process of embodiment 1 behind the auxiliary volume pin;
Fig. 3 is the naked core schematic diagram of extracting out in the electric core winding process of embodiment 1 behind the auxiliary volume pin.
Embodiment
Contrast accompanying drawing and the present invention is explained in detail below in conjunction with preferred embodiment.
As shown in Figure 2, the method for winding of the lithium-ion electric core of present embodiment, its specific operation process comprises:
The pole piece 2 and the barrier film 1 that manually will cut are folded successively, and its initiating terminal is wound on the master file pin 4, the master file needle drive mechanism drives 4 rotations of master file pin, after pole piece 2 that the drive initiating terminal has been had good positioning and barrier film 1 are wound to preset thickness, and preferred 4 ~ 5 millimeters of this preset thickness; Driving mechanism stops, the pole piece surface of predetermined thickness shown in manually an auxiliary volume pin 3 being positioned at abreast with master file pin 4, driving mechanism work, drive master file pin 4 and continue rotation, behind the circle to be spooled, unclamp auxiliary volume pin when continuing to reel, and continue the predetermined number of turns of reeling; Repeat to place the process of auxiliary volume pin 3 and coiling, until the dimensional requirement that reaches the electric core of reeling.After the size of electricity core reached the technological requirement of battery, driving mechanism stopped.On master file pin 4, manually take off electric core, extract all auxiliary volume pins out, carry out operations such as rubberizing.The material of described auxiliary volume pin 3, shape fibrous root be the technological requirement the during battery production of border and deciding factually, and preferably adopting thickness is that 2 ~ 5 millimeters, width are electric core width
~
Semicylinder or thin slice as auxiliary volume pin.
As shown in Figure 1, normal winding, promptly except that the master file pin, do not increase other volume electric core that pin wound, there is not the gap between barrier film 1 and the pole piece 2, there is tension force during owing to reel, makes the electric in-core portion of winding have certain internal stress, therefore when follow-up high-temperature baking or charge and discharge cycles, the internal stress that electricity in-core portion stores can progressively discharge, and causes barrier film to occur in the longitudinal direction shrinking.Because positive and negative plate can't shrink, and in winding process, barrier film is not taked necessary elimination internal stress measure or left distortion allowance, so will inevitably cause the distortion of pole piece, the end face of electric core presents " S " type, thereby make electric core thickening, produce fatal damage.As shown in Figure 3, increase the auxiliary gap 5 that formation can supply barrier film to shrink between barrier film 1 and pole piece 2, the auxiliary volume of electric core extraction pin 3 backs that pin 3 is wound of rolling up, when follow-up high-temperature baking or charge and discharge cycles, barrier film 1 shrinks, only can eradicate a mental barrier 1 and pole piece 2 between gap 5, the problem of electric core distortion can not appear.
The lithium-ion electric core method for winding of embodiment 1 adopts half manual mode, and part operation need manually be finished by human operator may, and winding efficiency is on the low side.Electric core winding method of the present invention is applicable to too on auto reeling equipment to be used, and its concrete implementation step is as follows:
The material volume of pole piece and barrier film is installed in respectively on the automatic unreeling structure, and the initiating terminal of barrier film and pole piece is wound on the master file pin of auto reeling equipment, barrier film and pole piece are unreeled automatically by automatic unreeling structure, automatically enter coiling portion, the master file pin is positioned at coiling portion, the rotation of drive mechanism master file pin, pole piece and barrier film that the drive initiating terminal has been had good positioning are wound to predetermined thickness, driving mechanism stops, the auxiliary volume pin parallel with the master file pin stretches out, and move to the surface of the pole piece or the barrier film of aforementioned preset thickness, driving mechanism starts, and drives master file pin continuation rotation and is wound to the predetermined number of turns, and auxiliary simultaneously volume pin also rotates with the master file pin under the driving of driving mechanism synchronously, repeat to place the process of auxiliary volume pin and coiling, until the dimensional requirement that reaches the electric core of reeling.After the size of electricity core reached the technological requirement of battery, driving mechanism stopped.Master file pin and other volume pin are return, and detach electric core, and rubberizing mechanism carries out rubberizing, and cutting agency is finished blanking.
In the practice, described master file pin can be the mandrel of electric core, directly drives mandrel by driving mechanism pole piece and membrane coil are around on the mandrel.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some being equal to substitute or obvious modification, and performance or purposes are identical, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. the method for winding of a lithium-ion electric core is characterized in that: may further comprise the steps:
Pole piece and barrier film are wound to preset thickness;
Auxiliary volume pin is positioned at the surface of the rapid products obtained therefrom of previous step;
Continue the predetermined number of turns of reeling;
Repeating said steps 2) and 3) reach predetermined size to electric core.
2. the method for winding of lithium-ion electric core according to claim 1, it is characterized in that: described step 1) comprises: step 1-1) in regular turn pole piece and barrier film are folded, and its initiating terminal is wound on the master file pin; 1-2) drive master file pin coiling pole piece and barrier film to preset thickness.
3. the method for winding of lithium-ion electric core according to claim 1, it is characterized in that: described step 1) comprises: step 1-3) the material volume with pole piece and barrier film is installed in respectively on the automatic unreeling structure, and the initiating terminal of described pole piece and barrier film is wound on the master file pin; 1-4) drive automatic unreeling structure pole piece and barrier film are unreeled, drive master file pin coiling pole piece and barrier film to preset thickness.
4. according to the method for winding of claim 1,2 or 3 described lithium-ion electric cores, it is characterized in that: described preset thickness is 4 ~ 5 millimeters.
5. according to the method for winding of claim 2 or 3 described lithium-ion electric cores, it is characterized in that: described master file pin is the mandrel of lithium-ion electric core.
6. according to the method for winding of claim 1,2 or 3 described lithium-ion electric cores, it is characterized in that: described auxiliary volume pin is that thickness is that 2 ~ 5 millimeters, width are electric core width
~
Semicylinder or thin slice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100633640A CN102157754A (en) | 2011-03-15 | 2011-03-15 | Method for winding battery cell of lithium ion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100633640A CN102157754A (en) | 2011-03-15 | 2011-03-15 | Method for winding battery cell of lithium ion |
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| CN102157754A true CN102157754A (en) | 2011-08-17 |
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| CN2011100633640A Pending CN102157754A (en) | 2011-03-15 | 2011-03-15 | Method for winding battery cell of lithium ion |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107354A (en) * | 2013-02-04 | 2013-05-15 | 深圳市赢合科技股份有限公司 | Core shaft type battery winding device, winding method and battery manufacturing method |
| CN105355992A (en) * | 2015-11-17 | 2016-02-24 | 天津市捷威动力工业有限公司 | Method for preventing flexible-package coiled lithium ion battery from deforming |
| CN106299489A (en) * | 2015-06-29 | 2017-01-04 | 曙鹏科技（深圳）有限公司 | Lithium-Ion Battery Core method for winding and preparation method of lithium ion battery |
| CN106711491A (en) * | 2016-12-30 | 2017-05-24 | 东莞市博拓锂电科技有限公司 | Auxiliary unloading device for circular wound needle, cable core winding equipment and cable core forming method |
| CN109509917A (en) * | 2018-11-28 | 2019-03-22 | 惠州锂威新能源科技有限公司 | A kind of winding process of battery battery core |
| WO2021218188A1 (en) * | 2020-04-29 | 2021-11-04 | 广东微电新能源有限公司 | Manufacturing method for cell of energy storage apparatus, and cell |
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| CN101212069A (en) * | 2006-12-29 | 2008-07-02 | 比亚迪股份有限公司 | Li-ion pole coiling method and coiling pin for the method |
| CN201438491U (en) * | 2009-07-02 | 2010-04-14 | 宁波维科电池有限公司 | Lithium ion battery pole piece winding device |
| CN101707264A (en) * | 2009-07-02 | 2010-05-12 | 宁波维科电池有限公司 | Method for winding pole piece of lithium ion battery and winding device thereof |
| CN101901934A (en) * | 2010-07-22 | 2010-12-01 | 黄祥盛 | Coiled laminate square lithium-ion battery cell and preparation method thereof |
-
2011
- 2011-03-15 CN CN2011100633640A patent/CN102157754A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212069A (en) * | 2006-12-29 | 2008-07-02 | 比亚迪股份有限公司 | Li-ion pole coiling method and coiling pin for the method |
| CN201438491U (en) * | 2009-07-02 | 2010-04-14 | 宁波维科电池有限公司 | Lithium ion battery pole piece winding device |
| CN101707264A (en) * | 2009-07-02 | 2010-05-12 | 宁波维科电池有限公司 | Method for winding pole piece of lithium ion battery and winding device thereof |
| CN101901934A (en) * | 2010-07-22 | 2010-12-01 | 黄祥盛 | Coiled laminate square lithium-ion battery cell and preparation method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107354A (en) * | 2013-02-04 | 2013-05-15 | 深圳市赢合科技股份有限公司 | Core shaft type battery winding device, winding method and battery manufacturing method |
| CN103107354B (en) * | 2013-02-04 | 2015-03-25 | 深圳市赢合科技股份有限公司 | Core shaft type battery winding device, winding method and battery manufacturing method |
| CN106299489A (en) * | 2015-06-29 | 2017-01-04 | 曙鹏科技（深圳）有限公司 | Lithium-Ion Battery Core method for winding and preparation method of lithium ion battery |
| CN106299489B (en) * | 2015-06-29 | 2019-01-25 | 曙鹏科技（深圳）有限公司 | Lithium-Ion Battery Core winding method and preparation method of lithium ion battery |
| CN105355992A (en) * | 2015-11-17 | 2016-02-24 | 天津市捷威动力工业有限公司 | Method for preventing flexible-package coiled lithium ion battery from deforming |
| CN105355992B (en) * | 2015-11-17 | 2018-04-20 | 天津市捷威动力工业有限公司 | A kind of method for preventing the deformation of flexible package coiled lithium ion battery |
| CN106711491A (en) * | 2016-12-30 | 2017-05-24 | 东莞市博拓锂电科技有限公司 | Auxiliary unloading device for circular wound needle, cable core winding equipment and cable core forming method |
| CN106711491B (en) * | 2016-12-30 | 2023-07-04 | 东莞市博拓锂电科技有限公司 | Auxiliary discharging device for round winding needle, battery core winding equipment and battery core forming method |
| CN109509917A (en) * | 2018-11-28 | 2019-03-22 | 惠州锂威新能源科技有限公司 | A kind of winding process of battery battery core |
| WO2021218188A1 (en) * | 2020-04-29 | 2021-11-04 | 广东微电新能源有限公司 | Manufacturing method for cell of energy storage apparatus, and cell |
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Address after: 518000, Guangdong, Baoan District, Shenzhen big wave Street wins community win Industrial Park 1, 1-2, 2, 1-3 Applicant after: Shenzhen YingHe Technology Co., Ltd. Address before: 518000, Shenzhen, Guangdong, Baoan District Longhua big wave street under the long Lang Industrial Zone won the science and Technology Industrial Park Applicant before: Shenzhen City Yinghe Technology Co., Ltd. |
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Application publication date: 20110817 |