CN103633378A - Coiled lithium battery and preparation method thereof - Google Patents
Coiled lithium battery and preparation method thereof Download PDFInfo
- Publication number
- CN103633378A CN103633378A CN201310651903.1A CN201310651903A CN103633378A CN 103633378 A CN103633378 A CN 103633378A CN 201310651903 A CN201310651903 A CN 201310651903A CN 103633378 A CN103633378 A CN 103633378A
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- Prior art keywords
- layer
- lithium battery
- rete
- polyolefin micropore
- type 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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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
- H01M2200/00—Safety devices for primary or secondary 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
- 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 coiled lithium battery and a preparation method thereof. The coiled lithium battery comprises a positive plate, a negative plate, a non-woven fabric layer and a polyolefin microporous film layer, wherein the negative plate is completely wrapped with the non-woven fabric film layer; the non-woven fabric film layer is completely wrapped with the polyolefin microporous film layer; the completely-wrapped positive plate and the negative plate completely wrapped with the non-woven fabric layer are directly clung to each other, and then are coiled from the inside to outside into an annular; the non-woven fabric layer is directly clung to the polyolefimicroporous n film layer while no adhesive is used between the non-woven fabric layer and the polyolefin microporous film layer. According to the invention, the non-woven fabric layer and the polyolefin microporous film layer form the diaphragm of the lithium battery together, the rupture temperature of the diaphragm can be increased to above 200 DEG C stably; if the diaphragm is coated with a ceramic layer, the diaphragm has a better effect; thus potential safety hazards of the lithium battery are effectively reduced.
Description
Technical field
The present invention relates to a kind of coiling type lithium battery and preparation method thereof.
Background technology
Lithium ion battery, as chemical power source of new generation, has been applied to the various aspects of social life: from 3C field, expand to the fields such as energy storage, electric bicycle/motorcycle, electric automobile.Along with the continuous increase of output, the accidents such as the lithium battery exposing all over the world blast, burning often have report: in January, 201 3, U.S.'s Boeing 787 passenger plane lithium batteries catch fire, and cause huge economic loss; 2007, the spontaneous combustion of Sony Notebook Battery caused large-tonnage product to recall ..., so the lifting of the security performance of lithium battery always is the technical problem of paying close attention in industry.
Four large main materials of lithium battery are respectively: positive pole, negative pole, barrier film, electrolyte, its septation, as one of main material, is vital to the fail safe of lithium battery.When battery discharges and recharges or thermal runaway state lower time in undesired, barrier film raises and deforms with temperature, will melt to be bonded together micropore is disappeared while reaching its closed pore temperature, stops ion to pass through, cut off in time internal current, prevent that internal temperature of battery from sharply raising.Yet if now battery system is in thermal run away state, that is: battery temperature continues to rise over diaphragm closed pore temperature, and reach after broken film temperature, membrane ruptures, both positive and negative polarity large area directly contacts, cause battery to be short-circuited, under extreme case, can make battery blast.Therefore,, for security consideration, battery diaphragm should possess relatively low closed pore temperature and higher broken film temperature.
At present, conventional its closed pore temperature of microporous polyolefin film and broken film temperature is as shown in the table:
As can be seen from the table, conventional microporous polyolefin film closed pore temperature is lower, and excursion is relatively little, but the variation of broken film temperature is larger, and this exists very large parameter when battery thermal runaway, causes great potential safety hazard.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of coiling type lithium battery.
The another one technical problem that the present invention will solve is to provide a kind of preparation method of coiling type lithium battery.
For coiling type lithium battery, the technical solution used in the present invention is: a kind of coiling type lithium battery, comprise positive plate and negative plate, and also comprise nonwoven layer and polyolefin micropore rete; Nonwoven fabrics rete wraps up negative plate completely, and polyolefin micropore rete wraps up nonwoven fabrics rete completely; After the described positive plate wrapping up is completely bonded to each other with the negative plate being wrapped up completely by nonwoven layer, be wound into from inside to outside annular.
As preferably, nonwoven layer and polyolefin micropore rete are directly bonded to each other, between nonwoven layer and polyolefin micropore rete, there is no adhesive.
As preferably, polyolefin micropore rete is monolayer polyethylene layer.
Preferred as another, polyolefin micropore rete is individual layer or double-deck polypropylene layer.
As further preferred, polyolefin micropore rete is that the trilamellar membrane (PP/PE/PP) of two layers of polypropylene layer therebetween one polyethylene layer forms.
Also have one preferably, the single or double of polyolefin micropore rete is coated with ceramic layer.
Further preferably, the single or double coated with ceramic layer of nonwoven layer.
For the preparation method of coiling type lithium battery, the technical solution used in the present invention is: comprise the following steps:
(1) nonwoven layer is wrapped up negative plate completely from negative plate head end, then polyolefin micropore rete is wrapped up nonwoven layer completely, the volume stem that forms battery core to be spooled is divided;
(2) will roll up stem and divide after at least 180 ° of pre-wounds, then positive plate will be attached to the outside of polyolefin micropore rete, and be wound into from inside to outside annular, during ending, with nonwoven fabrics and polyolefin micropore rete, around 360 ° of end of reel ends, high temperature gummed tape clings, and makes volume core.
The invention has the beneficial effects as follows:
The barrier film that jointly consists of lithium battery nonwoven layer and polyolefin micropore rete, more than can stablizing the broken film temperature to 200 ℃ that improves barrier film, the barrier film of coated with ceramic layer effect is better, so just effectively reduces cell safety hidden danger.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the structural representation of coiling type lithium battery embodiment of the present invention.
In figure, 1-negative plate, 2-nonwoven layer barrier film, 3-polyolefin micropore rete barrier film, 4-positive plate.
Embodiment
Step 1, lithium battery positive pole active substance and negative electrode active material are bonded at respectively on metal foil by binding agent, make positive plate and negative plate, as the positive plate 4 in Fig. 1 and negative plate 1;
Step 2, positive plate 4 and negative plate 1 reeled and become the battery structure shown in Fig. 1, detailed process is as follows:
1) material is prepared: positive plate, negative plate, polyolefin micropore rete barrier film 3, nonwoven layer barrier film 2 are installed respectively on up-coiler, and terminal adhesive tape; Wherein polyolefin micropore rete is the monolayer polyethylene layer of double-coated ceramic layer; Also the double-coated of nonwoven layer barrier film 2 has ceramic layer;
2) volume core is reeled: negative plate 1, polyolefin micropore rete barrier film 3 and nonwoven layer barrier film 2 are sent to coiling module, after first rolling up at least 180 ° in advance, replant into positive plate 4, reel, the coiling number of turns is controlled by controller, in winding process, by the alignment of correction module controls barrier film and pole piece, after single volume core has been reeled, by cutting off module, respectively positive plate 4, negative plate 1, polyolefin micropore rete barrier film 3 and nonwoven layer barrier film 2 are cut off;
3) rubberizing discharging: completed by rubberizing module after the fixedly termination of volume core, discharging module unloads single volume core to proceed to subsequent processing;
4) battery is made: the single volume core of making is packed in battery container, go between and seal welding after fluid injection, activation, complete battery and make.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection range of the present invention.
Claims (8)
1. a coiling type lithium battery, comprises positive plate and negative plate, it is characterized in that: also comprise nonwoven layer and polyolefin micropore rete; Described nonwoven fabrics rete wraps up negative plate completely, and described polyolefin micropore rete wraps up nonwoven fabrics rete completely; After the described positive plate wrapping up is completely bonded to each other with the negative plate being wrapped up completely by nonwoven layer, be wound into from inside to outside annular.
2. coiling type lithium battery according to claim 1, is characterized in that: described nonwoven layer and polyolefin micropore rete are directly bonded to each other, between described nonwoven layer and polyolefin micropore rete, there is no adhesive.
3. coiling type lithium battery according to claim 1, is characterized in that: described polyolefin micropore rete is monolayer polyethylene layer.
4. coiling type lithium battery according to claim 1, is characterized in that: described polyolefin micropore rete is individual layer or double-deck polypropylene layer.
5. coiling type lithium battery according to claim 1, is characterized in that: described polyolefin micropore rete is that the trilamellar membrane (PP/PE/PP) of two layers of polypropylene layer therebetween one polyethylene layer forms.
6. the coiling type lithium battery described in any one according to claim 1-5, is characterized in that: the single or double of described polyolefin micropore rete is coated with ceramic layer.
7. coiling type lithium battery according to claim 1, is characterized in that: the single or double coated with ceramic layer of described nonwoven layer.
8. the preparation method of coiling type lithium battery according to claim 1, is characterized in that comprising the following steps:
(1) nonwoven layer is wrapped up negative plate completely from negative plate head end, then polyolefin micropore rete is wrapped up nonwoven layer completely, the volume stem that forms battery core to be spooled is divided;
(2) will roll up stem and divide after at least 180 ° of pre-wounds, then positive plate will be attached to the outside of polyolefin micropore rete, and be wound into from inside to outside annular, during ending, with nonwoven fabrics and polyolefin micropore rete, around 360 ° of end of reel ends, high temperature gummed tape clings, and makes volume core.
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| CN201310651903.1A CN103633378B (en) | 2013-12-04 | 2013-12-04 | A kind of preparation method of coiling type lithium battery |
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| CN201310651903.1A CN103633378B (en) | 2013-12-04 | 2013-12-04 | A kind of preparation method of coiling type lithium battery |
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| CN103633378A true CN103633378A (en) | 2014-03-12 |
| CN103633378B CN103633378B (en) | 2016-04-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742721A (en) * | 2016-04-27 | 2016-07-06 | 国轩新能源（苏州）有限公司 | High-energy-ratio low-internal-resistance cylindrical lithium ion battery |
| CN110100349A (en) * | 2016-12-22 | 2019-08-06 | 三洋电机株式会社 | Columnar non-aqueous electrolyte secondary battery |
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| JP2002025526A (en) * | 2000-07-07 | 2002-01-25 | Sony Corp | Nonaqueous electrolytic solution battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742721A (en) * | 2016-04-27 | 2016-07-06 | 国轩新能源（苏州）有限公司 | High-energy-ratio low-internal-resistance cylindrical lithium ion battery |
| CN110100349A (en) * | 2016-12-22 | 2019-08-06 | 三洋电机株式会社 | Columnar non-aqueous electrolyte secondary battery |
| CN110100349B (en) * | 2016-12-22 | 2022-12-23 | 三洋电机株式会社 | Cylindrical nonaqueous electrolyte secondary battery |
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| Publication number | Publication date |
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| CN103633378B (en) | 2016-04-13 |
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Address after: 230000 Yaohai Industrial Zone, Hefei New District, Anhui, No. D weft Road, No. 7 Applicant after: Hefei Guoxuan High-Tech Power Energy Co., Ltd. Address before: 230000 Yaohai Industrial Park, Anhui, Hefei No. D weft Road, No. 7 Applicant before: Hefei Guoxuan High-Tech Power Energy Co., Ltd. |
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Effective date of registration: 20160627 Address after: Tiger Road Liuhe Economic Development Zone in Nanjing City, Jiangsu Province, No. 19 210000 Patentee after: NANJING GUOXUAN BATTERY CO., LTD. Address before: 230000 Yaohai Industrial Zone, Hefei New District, Anhui, No. D weft Road, No. 7 Patentee before: Hefei Guoxuan High-Tech Power Energy Co., Ltd. |