CN103346280A - Lithium battery and manufacturing method thereof - Google Patents
Lithium battery and manufacturing method thereof Download PDFInfo
- Publication number
- CN103346280A CN103346280A CN2013102332577A CN201310233257A CN103346280A CN 103346280 A CN103346280 A CN 103346280A CN 2013102332577 A CN2013102332577 A CN 2013102332577A CN 201310233257 A CN201310233257 A CN 201310233257A CN 103346280 A CN103346280 A CN 103346280A
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- lithium battery
- diaphragm
- barrier film
- positive plate
- plate
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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 lithium battery and a manufacturing method thereof, belonging to the field of lithium batteries. The problems of insufficient electrolyte retention performance and physical strength of a diaphragm in a wound core of a lithium battery in the prior art are overcome in the invention. The lithium battery comprises a wound core. The wound core comprises an aluminum foil positive plate, an aluminum foil negative plate and a polyolefin diaphragm, wherein the positive plate is spaced from the negative plate through the diaphragm, the positive plate and the negative plate are respectively provided with a positive tab and a negative tab, and the surface of the diaphragm is coated with a silicon oxide layer. The manufacturing method for the lithium battery comprises the following steps: successively arranging the positive plate, a first layer of the diaphragm, a negative plate and a second layer of the diaphragm for a to-be-wound core, wherein the positive tab and the negative tab are located at a same side, one end of each layer of the diaphragm extends out from the plates, and extension lengths of the two layers of the diaphragm are equal; prewinding the extension parts of the diaphragm along a direction that the second layer of the diaphragm is located inside; winding the positive plate and the negative plate along a prewinding direction of the diaphragm after completion of prewinding; and carrying out packaging with an aluminum-plastic membrane after completion of winding. After coating of silicon oxide on the surface of the diaphragm, electrolyte retention performance and physical strength of the diaphragm are improved, and safety of the lithium battery is improved.
Description
Technical field
The present invention relates to the lithium battery field, particularly a kind of lithium battery and manufacture method thereof.
Background technology
Lithium battery has advantages such as capacity height, volume are little, in light weight, but along with the development of mobile device, people have higher requirement to unit volume capacity, the fail safe of lithium battery.The volume core of lithium battery generally comprises positive plate, negative plate and barrier film.Lithium battery generally between positive plate and negative plate with barrier film at interval preventing short circuit, high but prior art polyalkene diaphragm commonly used is protected fluidity, and physical strength is lower, the dust that might be entered lithium battery coiling core inside does not pierce through and causes internal short-circuit.The lithium battery capacity of prior art can't meet the demands day by day in addition, and particularly mobile device becomes the higher lithium battery of a kind of unit volume capacity of exploitation to the requirement of service time to press for.
Summary of the invention
The purpose that the present invention will reach provides a kind of lithium battery and manufacture method thereof, and the unit volume capacity of this lithium battery is higher, and guarantor's fluidity of volume in-core portion barrier film better and not is vulnerable to physical damage.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of lithium battery, comprise the volume core, the volume core comprises aluminium foil positive plate, Copper Foil negative plate and polyalkene diaphragm, between positive plate and negative plate with barrier film at interval, be respectively equipped with anode ear and negative electrode lug on positive plate and the negative plate, the surface-coated of described barrier film has silicon oxide layer.
Further, negative plate is for being coated with Delanium, thickener, water system binding agent, conductive agent.The unit volume capacity of high compacting Delanium system increases the unit volume capacity of lithium battery greater than common Delanium.
Further, be coated with cobalt acid lithium on the positive plate, oil is binding agent, conductive agent.
The present invention discloses the manufacture method of above-mentioned lithium battery, comprising the steps: has ground floor barrier film, negative plate, the surface-coated of silicon oxide layer that the order setting lithium battery coiling core to be rolled up of the second layer barrier film of silicon oxide layer is arranged according to positive plate, surface-coated, and make anode ear and negative electrode lug be in the same side of lithium battery coiling core, a biseptate end exceeds positive plate, negative plate, and the length that exceeds is identical; The end that two-layer barrier film exceeds positive plate, negative plate begins pre-volume with second layer barrier film in interior direction; After treating that the both sides barrier film exceeds part and roll up in advance, the suitable barrier film of positive plate and negative plate is rolled up direction in advance and is begun coiling; After reeling and finish, uses lithium battery coiling core aluminum plastic film encapsulation volume wicking surface.
Further, the barrier film lateral edges exceeds positive plate, negative plate 2.5mm-4mm.Can prevent that in the lithium battery moving process touching of positive plate and negative plate is short-circuited behind the barrier film generation micro-displacement.
After adopting technique scheme, the present invention has following advantage:
Behind polyalkene diaphragm surface-coated silica, guarantor's fluidity of barrier film is improved greatly, and strengthened the physical strength of barrier film, prevent that effectively barrier film is subjected to entering the destruction of the dust of lithium battery coiling core inside, improves the fail safe of lithium battery greatly.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is the schematic diagram of the volume core after the embodiment of the invention two coilings are finished.
Embodiment
Embodiment one
Lithium battery comprises the volume core, and the volume core comprises positive plate, negative plate and barrier film.Barrier film is polyalkene diaphragm, and membrane surface is coated with silica.Positive plate is aluminium foil, and negative plate is Copper Foil, is coated with cobalt acid lithium on the positive plate, oil is binding agent, conductive agent, and negative plate is for being coated with high compacting Delanium, thickener, water system binding agent, conductive agent.With barrier film at interval, be respectively equipped with anode ear and negative electrode lug on positive plate and the negative plate between positive plate and negative plate.Positive plate adopts pure cobalt acid lithium material, and negative plate adopts high compacting Delanium system, and the unit volume capacity of high compacting Delanium system is greater than common Delanium, thereby has improved the unit volume capacity of lithium battery.Behind polyalkene diaphragm surface-coated silica, guarantor's fluidity of barrier film is improved greatly, and strengthened the physical strength of barrier film, prevent that effectively barrier film is subjected to entering the destruction of the dust of lithium battery coiling core inside, improves the fail safe of lithium battery greatly.
Embodiment two
See Fig. 1, mode according to positive plate 2, ground floor barrier film 1, negative plate (not shown), second layer barrier film (not shown) arranges lithium battery coiling core to be rolled up, and make anode ear 3 and negative electrode lug 4 be in the same side of lithium battery coiling core, a biseptate end exceeds positive plate 1, negative plate, and the length that exceeds is identical; Keep two-layer barrier film both sides of the edge to exceed positive plate 4mm, negative plate 2.5mm respectively, prevent in the lithium battery moving process, the touching of positive plate and negative plate is short-circuited behind the barrier film generation micro-displacement.The end that two-layer barrier film exceeds positive plate 1, negative plate begins pre-volume with second layer barrier film in interior direction.After treating that the both sides barrier film exceeds part and roll up in advance, the suitable barrier film of positive plate and negative plate is rolled up direction in advance and is begun coiling.After reeling and finish, uses lithium battery coiling core aluminum plastic film encapsulation volume wicking surface.
Except above preferred embodiment, the present invention also has other execution mode, and those skilled in the art can make various changes and distortion according to the present invention, only otherwise break away from spirit of the present invention, all should belong to the defined scope of claims of the present invention.
Claims (5)
1. lithium battery, comprise the volume core, the volume core comprises aluminium foil positive plate, Copper Foil negative plate and polyalkene diaphragm, between positive plate and negative plate with barrier film at interval, be respectively equipped with anode ear and negative electrode lug on positive plate and the negative plate, it is characterized in that: the surface-coated of described barrier film has silicon oxide layer.
2. according to claim 1, it is characterized in that: negative plate is for being coated with Delanium, thickener, water system binding agent, conductive agent.
3. a kind of lithium battery according to claim 1 and 2 is characterized in that: be coated with cobalt acid lithium on the positive plate, oil is binding agent, conductive agent.
4. make the manufacture method of the arbitrary described lithium battery of claim 1-3, it is characterized in that: comprise the steps,
(A) there are ground floor barrier film, negative plate, the surface-coated of silicon oxide layer that the order setting lithium battery coiling core to be rolled up of the second layer barrier film of silicon oxide layer is arranged according to positive plate, surface-coated, and make anode ear and negative electrode lug be in the same side of lithium battery coiling core, a biseptate end exceeds positive plate, negative plate, and the length that exceeds is identical;
(B) the two-layer barrier film end that exceeds positive plate, negative plate begins pre-volume with second layer barrier film in interior direction;
(C) treat that the both sides barrier film exceeds part and roll up in advance after, the suitable barrier film of positive plate and negative plate is rolled up direction in advance and is begun coiling;
(D) use aluminum plastic film encapsulation volume wicking surface after lithium battery coiling core is reeled and finished.
5. the manufacture method of lithium battery according to claim 4, it is characterized in that: the barrier film lateral edges exceeds positive plate, negative plate 2.5mm-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102332577A CN103346280A (en) | 2013-06-09 | 2013-06-09 | Lithium battery and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102332577A CN103346280A (en) | 2013-06-09 | 2013-06-09 | Lithium battery and manufacturing method thereof |
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| CN103346280A true CN103346280A (en) | 2013-10-09 |
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| CN2013102332577A Pending CN103346280A (en) | 2013-06-09 | 2013-06-09 | Lithium battery and manufacturing method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06140071A (en) * | 1992-10-29 | 1994-05-20 | Shin Kobe Electric Mach Co Ltd | Lead-acid battery and manufacture thereof |
| CN102407623A (en) * | 2011-08-04 | 2012-04-11 | 中国第一汽车股份有限公司 | Preparation method of composite membrane for lithium ion battery |
| CN102487150A (en) * | 2010-12-03 | 2012-06-06 | 比亚迪股份有限公司 | Winding method and device of battery cell |
| CN102623658A (en) * | 2012-03-12 | 2012-08-01 | 宁德新能源科技有限公司 | Diaphragm and preparation method thereof, and lithium ion battery |
-
2013
- 2013-06-09 CN CN2013102332577A patent/CN103346280A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06140071A (en) * | 1992-10-29 | 1994-05-20 | Shin Kobe Electric Mach Co Ltd | Lead-acid battery and manufacture thereof |
| CN102487150A (en) * | 2010-12-03 | 2012-06-06 | 比亚迪股份有限公司 | Winding method and device of battery cell |
| CN102407623A (en) * | 2011-08-04 | 2012-04-11 | 中国第一汽车股份有限公司 | Preparation method of composite membrane for lithium ion battery |
| CN102623658A (en) * | 2012-03-12 | 2012-08-01 | 宁德新能源科技有限公司 | Diaphragm and preparation method thereof, and lithium ion battery |
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Application publication date: 20131009 |