CN102222802A - Method for manufacturing lithium ion battery and rolled core thereof and lithium ion battery - Google Patents
Method for manufacturing lithium ion battery and rolled core thereof and lithium ion battery Download PDFInfo
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- CN102222802A CN102222802A CN2010101516654A CN201010151665A CN102222802A CN 102222802 A CN102222802 A CN 102222802A CN 2010101516654 A CN2010101516654 A CN 2010101516654A CN 201010151665 A CN201010151665 A CN 201010151665A CN 102222802 A CN102222802 A CN 102222802A
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- barrier film
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- protective layer
- lithium ion
- ion battery
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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 relates to a method for manufacturing a lithium ion battery, which comprises the following steps of: separating a positive plate from a negative plate by a membrane, and winding layer by layer to form a rolled core; and after the membrane is wrapped at the tails of the negative plate and the positive plate, continuing to wind for a circle or above around the rolled core so as to form a membrane protection layer on the outermost layer of the rolled core. The membrane protection layer disclosed by the invention has small friction coefficients, so that the membrane protection layer is beneficial to mounting the rolled core in a shell; meanwhile the potential safety hazard caused by the damaged rolled core can be prevented due to the protection layer.
Description
Technical field
The present invention relates to lithium ion battery, be specifically related to a kind of manufacture method and the volume core and lithium ion battery of being more convenient for the core winding into shell assembling and reducing the lithium ion battery of potential safety hazard.
Background technology
Since the lithium ion battery commercialization, lithium ion battery is active in communication as energy carrier, digital camera because of its energy density height, specific power are big, good cycle, memory-less effect, pollution-free, light characteristics such as portable, video camera, fields such as notebook.Simultaneously, lithium ion battery also is the ideal selection of the energy of following electric motor car.Upgrading along with the electronic digital product, the consumer also more is tending towards slimming to the requirement of battery outward appearance, but goods producer or battery of mobile phone manufacturer also require more and more higher to the capacity of lithium ion battery simultaneously, therefore require directly to cause the manufacture difficulty of lithium ion battery also increasing under the more and more higher situation in the more and more littler but battery capacity of accommodation space.Such as: under the certain situation of material system, in order to promote the capacity of lithium ion battery, the most frequently used method of lithium ion battery technical staff is exactly the dressing that increases material, and this has just increased the thickness and the width of volume core virtually, when the volume core that thickness and width all increase is gone into shell when assembling, difficulty must increase, and efficient decreases, in case the volume core is difficult to be easy to cause the potential safety hazard of rolling up the bad battery use that brings of core card into shell.
Figure 1 shows that the cutaway view that existing volume core technology is reeled.Among Fig. 1, the positive plate of 10 representative volume cores, the negative plate of 11 representative volume cores, the barrier film of 12 representative volume cores, the termination gummed paper on the 13 representative volume cores, A1 represents negative plate ending position, and B1 represents positive plate ending position, and C1 represents the barrier film off-position.During existing electric core technology is reeled, when the two-layer barrier film of volume core is wound up into negative plate ending position A1 simultaneously, after barrier film wraps negative plate ending position A1 fully and extends slightly forward simultaneously, be cut off in the C1 position.Wherein, this volume core most external is to adhere to the aluminium foil of positive electrode.
But, the mode of this kind volume core ending, volume core periphery is to adhere to the aluminium foil of positive electrode and stop adhesive tape, the aluminium foil coefficient of friction is big, increasing the coiling active material, under the situation that volume core thickness increases, increased on the contrary and gone into the shell difficulty, the bad situation of easier appearance volume core card has increased the potential safety hazard that battery uses.
Summary of the invention
The purpose of this invention is to provide a kind of manufacture method and the volume core and lithium ion battery of being more convenient for the core winding into shell assembling and reducing the lithium ion battery of potential safety hazard.
The technical scheme that realizes described purpose is: a kind of manufacture method of lithium ion battery may further comprise the steps: positive plate and negative plate separate successively to reel in the same direction to form with barrier film rolls up core; This barrier film is rolled up core coiling one circle or is being rolled up the outermost layer formation barrier film protective layer of core more than the circle thereby continue to center on after the ending of parcel negative plate and positive plate is sentenced.
Further, this barrier film is cut off and sticks the termination adhesive tape at the barrier film protective layer place of positive plate ending position correspondence.
As the preferred embodiment of the present invention, the volume core with the barrier film protective layer that is extended to form by barrier film is toasted by heater, makes barrier film shrink together with the barrier film protective layer.
Specifically, this heater comprises conveyer belt and metal heating plate.
Preferably, this baking temperature is between 60 degrees centigrade to 130 degrees centigrade.
The invention still further relates to the battery roll core and the lithium ion battery that use this method to make.
The present invention's beneficial effect compared with prior art is:
The manufacture method of lithium ion battery of the present invention; the barrier film of isolating positive plate and negative plate is after the ending of parcel negative plate and positive plate is sentenced; continue to extend; thereby and around volume core coiling one circle or the above outermost layer formation barrier film protective layer of a circle at the volume core; this barrier film protective layer coefficient of friction is little; be beneficial to core winding into shell and install, simultaneously owing to the existence of protective layer can be avoided because of the bad potential safety hazard of bringing of volume core card.
Further, by the technical scheme of each embodiment, bring following beneficial effect:
The manufacture method of lithium ion battery of the present invention; barrier film is cut off and sticks the termination adhesive tape at positive plate ending protection layer corresponding place, position; that is guarantee that barrier film starts at around volume core one circle from positive plate ending position at least, and guarantee that barrier film coats the volume core fully, guarantee to roll up core and easily slip into battery case.
Battery roll core of the present invention, the volume core with barrier film protective layer is toasted by heater, not only helps faster evaporation of moisture and disappearance in the volume core, has improved the electrical property of battery; Make that simultaneously barrier film shrinks together with protective layer, improved the elasticity of volume core, be more conducive to battery core winding into shell.
Description of drawings
Below by embodiment also in conjunction with the accompanying drawings, the present invention is described in further detail:
Fig. 1 is the volume cored structure schematic diagram of existing lithium ion battery;
Fig. 2 is the volume cored structure schematic diagram of present embodiment lithium ion battery;
Fig. 3 is the structural representation of heater in the manufacture method of present embodiment lithium ion battery.
Embodiment
See also Fig. 2; present embodiment relates to a kind of manufacture method of lithium ion battery; the barrier film 22 of isolating positive plate 20 and negative plate 21 is after the A2 of ending place, the B2 of parcel negative plate and positive plate; continue to extend; thereby and around volume core coiling one circle or the above outermost layer formation barrier film protective layer 40 of a circle at the volume core; these barrier film protective layer 40 coefficient of frictions are little; be beneficial to core winding into shell and install, simultaneously owing to the existence of protective layer 40 can be avoided because of rolling up the potential safety hazard that the bad lithium ion battery that brings of core card uses.
Present embodiment also relates to a kind of lithium ion battery, comprises battery case, is contained in the volume core of battery case and the electrolyte that injects battery case.Figure 2 shows that the cutaway view of the volume core coiling of present embodiment.Wherein, the positive plate of 20 representative volume cores, the negative plate of 21 representative volume cores, the barrier film of 22 representative volume cores, the termination gummed paper on the 23 representative volume cores, A2 represents negative plate ending position, and B2 represents positive plate ending position, and C2 represents the barrier film off-position.
This volume core is successively reeled by positive plate 20, barrier film 22 and negative plate 21 and is formed.This barrier film 22 is rolled up core coiling one circle or is being rolled up the outermost layer formation barrier film protective layer 40 of core more than the circle thereby continue to center on after ending A2, the B2 of parcel negative plate 21 and positive plate 20 sentence.Start at from positive plate 20 ending B2 in the present embodiment, continuing coiling volume core one circle with barrier film 22 is that example is illustrated, the number of turns that barrier film 22 continues to reel is suitably adjusted according to the standard size and the electric core winding thickness of battery case, can nothing serious smoothly slips into battery case with the volume core and is as the criterion.
The lithium ion battery coil core method for winding of present embodiment is different from existing volume core winding method but also is simultaneously the extension of existing winding method.Existing volume core winding method is: positive plate 10, barrier film 12 and negative plate 11 are wound up into tail end jointly, after the ending position A1 of barrier film 12 anticathode sheets wraps up fully, then cut off barrier film 12 immediately, form the ending position C1 of barrier film 12.Finish to paste behind the coiling of positive plate 10 ending position B1 stopping adhesive tape 13, the outermost layer of existing volume core be as the aluminium foil of positive electrode carrier and termination adhesive tape.
And in the present embodiment; barrier film 22 is after wrapping up negative plate 21 ending position A2 fully; do not cut off barrier film 22 immediately but make barrier film 22 continue to reel; after treating that barrier film 22 wraps up the ending position B2 of positive plate 20 fully; barrier film 22 continues that again the volume core is wrapped up a circle and forms barrier film protective layer 40; 20 ending B2 protection layer corresponding 40 places, position cut off barrier film 22 at positive plate; form barrier film ending position C2; and at barrier film ending position C2 stickup termination adhesive tape 23; finish the making of volume core, the outermost layer of this volume core is barrier film protective layer 40 and stops adhesive tape 23.
In this example; barrier film 22 is cut off and sticks termination adhesive tape 23 at positive plate 20 ending B2 protection layer corresponding 40 places, position; that is guarantee that barrier film 22 starts at least around volume core one circle from positive plate ending position B2, thus guaranteeing that barrier film 22 coats fully rolls up core, to guarantee that rolling up core easily slips into battery case.
Please in the lump with reference to figure 3, the volume core with barrier film protective layer 40 is toasted by heater, and purpose is barrier film 22 to be shunk together with barrier film protective layer 40 wrap the volume core.This toasts operation, not only helps faster evaporation of moisture and disappearance in the volume core, has improved the electrical property of battery; Make barrier film 22 shrink simultaneously, improved the elasticity of volume core, be more conducive to battery core winding into shell together with protective layer 40.
This heater comprise be used for transmitting reeled the volume core 25 that finishes conveyer belt and be arranged on the conveyer belt both sides and be used for the metal heating plate 30 of heated belt.
In the present embodiment, the temperature of this baking operation suits between 60 degrees centigrade to 130 degrees centigrade.
The some volume cores 25 that finish of having reeled flow to subsequent processing with speed V on the conveyer belt of band metal heating plate 30, the heating-up temperature of conveyer belt is between 60 ℃-130 ℃, the volume core is after the process heating, utilize the shrinkage of barrier film 22, barrier film 22 is shunk to volume in-core side wrap the volume core, improved the elasticity of volume core.And because the coefficient of friction of the barrier film protective layer 40 of outer ring is littler than the outer ring aluminium foil of conventional volume core, thereby be beneficial to core winding into shell, simultaneously because the bad potential safety hazard of bringing of volume core card has been avoided in the protection of outer ring barrier film protective layer 40.
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 general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the manufacture method of a lithium ion battery may further comprise the steps:
Positive plate and negative plate separate successively to reel in the same direction to form with barrier film rolls up core;
Described barrier film is rolled up core coiling one circle or is being rolled up the outermost layer formation barrier film protective layer of core more than the circle thereby continue to center on after the ending of parcel negative plate and positive plate is sentenced.
2. the manufacture method of lithium ion battery according to claim 1 is characterized in that: described barrier film is cut off and sticks the termination adhesive tape at the barrier film protective layer place of positive plate ending position correspondence.
3. the manufacture method of lithium ion battery according to claim 2, it is characterized in that: the volume core with barrier film protective layer is toasted by heater, makes barrier film shrink together with the barrier film protective layer.
4. the manufacture method of lithium ion battery according to claim 3, it is characterized in that: described heater comprises conveyer belt and metal heating plate.
5. the manufacture method of lithium ion battery according to claim 4, it is characterized in that: described baking temperature is between 60 degrees centigrade to 130 degrees centigrade.
6. battery roll core; comprise positive plate, barrier film and negative plate; positive plate and negative plate separate successively to reel to form with barrier film rolls up core; it is characterized in that: described barrier film is after the ending of parcel negative plate and positive plate is sentenced, thereby being used to continue encloses or the above outermost layer formation barrier film protective layer at the volume core of a circle around volume core coiling one.
7. battery roll core according to claim 6; it is characterized in that: described barrier film is cut off at the barrier film protective layer place of positive plate ending position correspondence and by stopping tape seal; volume core with barrier film protective layer is toasted by heater, barrier film is shunk together with the barrier film protective layer wrap the volume core.
8. battery roll core according to claim 7 is characterized in that: described baking temperature is between 60 degrees centigrade to 130 degrees centigrade.
9. lithium ion battery; comprise battery case, be contained in the volume core and the electrolyte of battery case; described volume core is successively reeled by positive plate, barrier film and negative plate and is formed; it is characterized in that: described barrier film is after the ending of parcel negative plate and positive plate is sentenced, thereby being used to continue encloses or the above outermost layer formation barrier film protective layer at the volume core of a circle around volume core coiling one.
10. lithium ion battery according to claim 9; it is characterized in that: described barrier film is cut off at the barrier film protective layer place of positive plate ending position correspondence and by stopping tape seal; volume core with barrier film protective layer is toasted by heater, barrier film is shunk together with the barrier film protective layer wrap the volume core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101516654A CN102222802A (en) | 2010-04-15 | 2010-04-15 | Method for manufacturing lithium ion battery and rolled core thereof and lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101516654A CN102222802A (en) | 2010-04-15 | 2010-04-15 | Method for manufacturing lithium ion battery and rolled core thereof and lithium ion battery |
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| CN102222802A true CN102222802A (en) | 2011-10-19 |
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| CN2010101516654A Pending CN102222802A (en) | 2010-04-15 | 2010-04-15 | Method for manufacturing lithium ion battery and rolled core thereof and lithium ion battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683736A (en) * | 2012-03-07 | 2012-09-19 | 宁德新能源科技有限公司 | Battery cell winding method and equipment |
| CN103378373A (en) * | 2012-04-18 | 2013-10-30 | 株式会社杰士汤浅国际 | Energy storage device and winding apparatus |
| CN103746144A (en) * | 2014-01-20 | 2014-04-23 | 深圳市吉阳自动化科技有限公司 | Coiled laminated battery cell and battery |
| CN104134822A (en) * | 2013-05-31 | 2014-11-05 | 中航锂电（洛阳）有限公司 | Assembling and fastening method and apparatus for lithium ion battery core |
| CN108258294A (en) * | 2017-12-27 | 2018-07-06 | 深圳瑞隆新能源科技有限公司 | A kind of takeup type battery core, electric core winding method and coiled battery |
| CN110534703A (en) * | 2018-05-26 | 2019-12-03 | 深圳格林德能源有限公司 | A kind of high capacity silicon cathode lithium ion battery |
| WO2021195906A1 (en) * | 2020-03-31 | 2021-10-07 | 东莞新能安科技有限公司 | Electrochemical apparatus and electronic apparatus using electrochemical apparatus |
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| KR20050020552A (en) * | 2003-08-19 | 2005-03-04 | 삼성에스디아이 주식회사 | Jelly-roll type electrode assembly and secondary battery therewith |
| CN1988240A (en) * | 2005-12-23 | 2007-06-27 | 深圳市比克电池有限公司 | Winding type soft package lithium ion battery and its preparing method |
| CN101393975A (en) * | 2008-10-10 | 2009-03-25 | 深圳市邦凯电子有限公司 | Colloidal state polymer battery and composite diaphragm manufacturing method therefor |
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2010
- 2010-04-15 CN CN2010101516654A patent/CN102222802A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20050020552A (en) * | 2003-08-19 | 2005-03-04 | 삼성에스디아이 주식회사 | Jelly-roll type electrode assembly and secondary battery therewith |
| CN1988240A (en) * | 2005-12-23 | 2007-06-27 | 深圳市比克电池有限公司 | Winding type soft package lithium ion battery and its preparing method |
| CN101393975A (en) * | 2008-10-10 | 2009-03-25 | 深圳市邦凯电子有限公司 | Colloidal state polymer battery and composite diaphragm manufacturing method therefor |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683736A (en) * | 2012-03-07 | 2012-09-19 | 宁德新能源科技有限公司 | Battery cell winding method and equipment |
| CN102683736B (en) * | 2012-03-07 | 2015-04-15 | 宁德新能源科技有限公司 | Battery cell winding method and equipment |
| CN103378373A (en) * | 2012-04-18 | 2013-10-30 | 株式会社杰士汤浅国际 | Energy storage device and winding apparatus |
| CN103378373B (en) * | 2012-04-18 | 2017-04-12 | 株式会社杰士汤浅国际 | Energy storage device and winding apparatus |
| CN104134822A (en) * | 2013-05-31 | 2014-11-05 | 中航锂电（洛阳）有限公司 | Assembling and fastening method and apparatus for lithium ion battery core |
| CN103746144A (en) * | 2014-01-20 | 2014-04-23 | 深圳市吉阳自动化科技有限公司 | Coiled laminated battery cell and battery |
| CN108258294A (en) * | 2017-12-27 | 2018-07-06 | 深圳瑞隆新能源科技有限公司 | A kind of takeup type battery core, electric core winding method and coiled battery |
| CN110534703A (en) * | 2018-05-26 | 2019-12-03 | 深圳格林德能源有限公司 | A kind of high capacity silicon cathode lithium ion battery |
| WO2021195906A1 (en) * | 2020-03-31 | 2021-10-07 | 东莞新能安科技有限公司 | Electrochemical apparatus and electronic apparatus using electrochemical apparatus |
| CN113614978A (en) * | 2020-03-31 | 2021-11-05 | 东莞新能安科技有限公司 | Electrochemical device and electronic device using the same |
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