CN103579684A - Lithium ion battery and battery core thereof - Google Patents
Lithium ion battery and battery core thereof Download PDFInfo
- Publication number
- CN103579684A CN103579684A CN201210268818.2A CN201210268818A CN103579684A CN 103579684 A CN103579684 A CN 103579684A CN 201210268818 A CN201210268818 A CN 201210268818A CN 103579684 A CN103579684 A CN 103579684A
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- China
- Prior art keywords
- pole piece
- battery
- barrier film
- lithium ion
- ion battery
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
-
- 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 battery core of a lithium ion battery, the battery core comprises a first pole piece, second pole pieces and diaphragms, the first pole piece and the second pole pieces are reverse in polarity, the first pole piece is continuously bended to form bending parts and straight parts between the bending parts, the bending parts of the first pole piece are provided with blank areas, the blank areas are areas which are on the surface of the first pole piece and not coated with an active material, the second pole pieces are arranged in the straight parts of the first pole piece, the first pole piece and the second pole pieces are absolutely isolated by the diaphragms, so that the problem that the active material on the surfaces of the bending parts of the battery core falls off to cause lithium ion battery internal short circuit can be avoided. The invention also provides the lithium ion battery.
Description
Technical field
The present invention relates to a kind of lithium ion battery and battery thereof.
Background technology
The lamination of the battery of at present general lithium ion battery mainly contains two kinds.The first lamination is one chip lamination.The second lamination is continous way lamination.In one chip lamination, the positive/negative plate of described battery is one chip positive/negative plate.Described one chip lamination has advantages of that the space of making full use of, energy content of battery density are high, but because it exists more pole piece edge, therefore in manufacture process, the burr at pole piece edge is difficult to control, thereby the probability of inside lithium ion cell short circuit is increased, poor safety performance.In continous way lamination, the positive/negative plate of described battery is banded positive/negative plate.Although continous way lamination has solved the unmanageable problem of burr of one chip lamination, but, banded positive/negative plate in its bending place because radius of curvature is little, active material on banded positive/negative plate very easily comes off, the powder splitting away off is easy to cause described inside lithium ion cell short circuit, causes potential safety hazard.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of lithium ion battery and battery thereof are provided, to improve the fail safe of lithium battery.
A kind of battery of lithium ion battery, comprise the first pole piece, the second pole piece and barrier film, described the first pole piece is contrary with the polarity of described the second pole piece, described the first pole piece continuously bending is formed with the straight portion between bending part and bending part, the bending part surface of described the first pole piece is provided with white space, described white space is described the first uncoated region that has active material, pole piece surface, described the second pole piece is arranged at the straight portion of described the first pole piece, between described the first pole piece and described the second pole piece, by described barrier film, definitely isolates.
A kind of lithium ion battery, comprise flexible package shell, nonaqueous electrolytic solution and be arranged at the battery in described flexible package shell, described battery comprises the first pole piece, the second pole piece and barrier film, described the first pole piece is contrary with the polarity of described the second pole piece, described the first pole piece continuously bending is formed with the straight portion between bending part and bending part, described bending part surface is provided with white space, described white space is described the first uncoated region that has active material, pole piece surface, described the second pole piece is arranged in the straight portion of described the first pole piece, between described the first pole piece and described the second pole piece, by described barrier film, definitely isolate.
Described lithium ion battery comprises described battery, the bending part surface of the first pole piece of described battery is provided with white space, described white space is described the first uncoated region that has active material, pole piece surface, thereby avoided the active material of the bending part of existing pole piece to occur coming off, causes the problem of lithium ion internal short-circuit.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing;
Fig. 1 is the schematic diagram of the first better embodiment of the battery of lithium ion battery of the present invention;
Fig. 2 is the schematic diagram of the first banded positive plate of Fig. 1;
Fig. 3 is the schematic diagram of the second better embodiment of the battery of lithium ion battery of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 and 2, a kind of lithium ion battery that the present invention's the first preferred embodiment provides, described lithium ion battery comprises battery, flexible package shell and nonaqueous electrolytic solution.Described battery and described nonaqueous electrolytic solution are arranged in described flexible package shell.Described battery comprises that the first pole piece is if banded pole piece 11, the second pole piece are as one chip pole piece 12 and barrier film 13.Described banded pole piece 11 is contrary with the polarity of described one chip pole piece 12.On described banded pole piece 11, be coated with active material, and described banded pole piece 11 is reserved with the white space 111 of uncoated active material.Described banded pole piece 11 along its length continuous Z-type is bent to form the straight portion between bending part and bending part.Now, the surface of the bending part of described banded pole piece 11 is provided with white space 111.Described one chip pole piece 12 is arranged in the straight portion of described banded pole piece 11.Between described one chip pole piece 12 and described banded pole piece 11, by described barrier film 13, definitely isolate.
Particularly, in the present embodiment, described barrier film 13 is banded barrier film.Described banded barrier film presents double-deck doubled state.Described banded pole piece 11 is arranged in the banded barrier film of double-deck doubling so that described banded barrier film is completely coated by described banded pole piece 11.After the completely coated described banded pole piece 11 of described banded barrier film, leave the idle part of a preset length.The banded pole piece 11 that is coated with described banded barrier film along its length continuously Z-type be bent to form described bending part and described straight portion.The surface of described bending part is provided with white space 111.Described one chip pole piece 12 is arranged in the straight portion of described banded pole piece 11, thereby forms the main core body of described battery.The idle part of described banded barrier film is carried out described main core body voluble wrapping and then is formed described battery 1.
Wherein, on described banded pole piece 11, described white space 111 quantity of uncoated polar material can be adjusted as required.And the spacing between every two adjacent white spaces 111 can equate also can not wait.But all need to guarantee that described banded pole piece is along its length continuously after Z-type bending, the bending part surface of described banded pole piece 11 is provided with white space 111.The number of times that described banded pole piece 11 bends along its length is continuously adjusted according to actual needs.The quantity of described one chip pole piece 12 can be adjusted according to the quantity of the straight portion forming after described banded pole piece 11 bendings.
In the present embodiment, described banded pole piece 11 is banded positive plate.Described one chip pole piece 12 is one chip negative plate.The outside of the outermost banded pole piece of the main core body of described battery 1 is uncoated active material all.
In other embodiments, described banded pole piece 11 can be also banded negative plate.Described one chip pole piece 12 can be also one chip positive plate.
Refer to Fig. 4, the difference of the present invention's the second better embodiment and the first better embodiment is: described barrier film 13 is described pocket type barrier film, and described pocket type barrier film is coated described one chip pole piece 12.Thereby the one chip pole piece 12 that is coated with described pocket type barrier film is arranged at the main core body that forms described battery in the straight portion forming after described banded pole piece 11 bendings.The bending part surface of described main core body is provided with white space 111.The uncoated active material of both ends of the surface of the outermost banded pole piece 11 of described main core body.
In the present embodiment, described banded pole piece 11 is banded positive plate.Described one chip pole piece is one chip negative plate.
In other embodiments, described banded pole piece 11 can be banded negative plate.Described one chip pole piece 12 can be one chip positive plate.The data of the quantity of described pocket type barrier film 13 and described one chip pole piece 12 can be adjusted according to the quantity of the straight portion forming after described banded pole piece 11 bendings.
Described lithium ion battery 100 comprises the battery being arranged in described flexible package housing, described battery comprises main core body, the bending part surface of described main core body is provided with white space 111, thereby avoided existing main core body kink generation active material to come off, causes the problem of lithium ion internal short-circuit.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the claims in the present invention, still belongs to the scope that the present invention is contained.
Claims (10)
1. the battery of a lithium ion battery, comprise the first pole piece, the second pole piece and barrier film, described the first pole piece is contrary with the polarity of described the second pole piece, described the first pole piece continuously bending is formed with the straight portion between bending part and bending part, described bending part surface is provided with white space, described white space is described the first uncoated region that has active material, pole piece surface, described the second pole piece is arranged in the straight portion of described the first pole piece, between described the first pole piece and described the second pole piece, by described barrier film, definitely isolates.
2. the battery of smooth lithium ion battery as claimed in claim 1, is characterized in that, described barrier film is completely coated by described the first pole piece, and the first pole piece that is coated with described barrier film is bent to form described bending part and described straight portion continuously.
3. the battery of smooth lithium ion battery as claimed in claim 2, is characterized in that, described barrier film doubling, and described the first pole piece is arranged in the doubling part of barrier film so that described barrier film is completely coated by described the first pole piece.
4. the battery of smooth lithium ion battery as claimed in claim 3, is characterized in that, leaves the idle part of a preset length after coated described the first pole piece of described barrier film, and the idle part of described barrier film is carried out voluble wrapping by described first and second pole piece.
5. the battery of smooth lithium ion battery as claimed in claim 1, is characterized in that, described the first pole piece is Z-type bending continuously along its length.
6. the battery of smooth lithium ion battery as claimed in claim 1, is characterized in that, the spacing on described the first pole piece surface between every adjacent two uncoated white spaces that have an active material equates.
7. the battery of lithium ion battery as claimed in claim 1, is characterized in that, described barrier film is coated described the second pole piece, and the second pole piece that is coated with described barrier film is arranged in the straight portion of described the first pole piece.
8. the battery of the lithium ion battery as described in claim 1 or 7, is characterized in that, described the first pole piece is positive plate, and described the second pole piece is negative plate.
9. a lithium ion battery, comprise flexible package shell, nonaqueous electrolytic solution and be arranged at the battery in described flexible package shell, described battery comprises the first pole piece, the second pole piece and barrier film, described the first pole piece is contrary with the polarity of described the second pole piece, described the first pole piece continuously bending is formed with the straight portion between bending part and bending part, described bending part surface is provided with white space, described white space is described the first uncoated region that has active material, pole piece surface, described the second pole piece is arranged in the straight portion of described the first pole piece, between described the first pole piece and described the second pole piece, by described barrier film, definitely isolate.
10. lithium ion battery as claimed in claim 9, is characterized in that, the spacing on described the first pole piece surface between every adjacent two uncoated white spaces that have an active material equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268818.2A CN103579684A (en) | 2012-07-31 | 2012-07-31 | Lithium ion battery and battery core thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268818.2A CN103579684A (en) | 2012-07-31 | 2012-07-31 | Lithium ion battery and battery core thereof |
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| Publication Number | Publication Date |
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| CN103579684A true CN103579684A (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210268818.2A Pending CN103579684A (en) | 2012-07-31 | 2012-07-31 | Lithium ion battery and battery core thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682460A (en) * | 2013-12-19 | 2014-03-26 | 深圳市吉阳自动化科技有限公司 | Stacking machine and stacking method thereof |
| CN104103854A (en) * | 2014-06-12 | 2014-10-15 | 河北工业大学 | Laminated cylindrical lithium ion battery and fabrication method thereof |
| CN105576294A (en) * | 2016-01-08 | 2016-05-11 | 珠海光宇电池有限公司 | Fabrication method of laminated trapezoid battery core and laminated battery core |
| CN107305942A (en) * | 2016-04-22 | 2017-10-31 | 北京好风光储能技术有限公司 | A kind of takeup type negative plate and battery core and lithium slurry battery provided with the negative plate |
| CN108604710A (en) * | 2016-02-29 | 2018-09-28 | 松下知识产权经营株式会社 | Laminated type non-aqueous electrolyte secondary battery |
| CN109585773A (en) * | 2017-09-28 | 2019-04-05 | 江苏津谊新能源科技有限公司 | A method of prevent inside lithium ion cell short-circuit |
| WO2022126634A1 (en) * | 2020-12-18 | 2022-06-23 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and manufacturing system therefor, battery cell, battery and electrical device |
| CN115064757A (en) * | 2022-08-19 | 2022-09-16 | 江苏时代新能源科技有限公司 | Battery cell, battery and power consumption device |
| WO2024036752A1 (en) * | 2022-08-18 | 2024-02-22 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and electrical apparatus |
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| CN2497437Y (en) * | 2001-08-16 | 2002-06-26 | 潘杰民 | Lithium ion polymer cell |
| CN101150184A (en) * | 2006-09-19 | 2008-03-26 | 深圳市比克电池有限公司 | A coiling lithium secondary battery |
| CN101707262A (en) * | 2009-09-30 | 2010-05-12 | 东莞新能源科技有限公司 | Lithium ion battery and preparation method thereof |
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Patent Citations (3)
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|---|---|---|---|---|
| CN2497437Y (en) * | 2001-08-16 | 2002-06-26 | 潘杰民 | Lithium ion polymer cell |
| CN101150184A (en) * | 2006-09-19 | 2008-03-26 | 深圳市比克电池有限公司 | A coiling lithium secondary battery |
| CN101707262A (en) * | 2009-09-30 | 2010-05-12 | 东莞新能源科技有限公司 | Lithium ion battery and preparation method thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682460A (en) * | 2013-12-19 | 2014-03-26 | 深圳市吉阳自动化科技有限公司 | Stacking machine and stacking method thereof |
| CN104103854A (en) * | 2014-06-12 | 2014-10-15 | 河北工业大学 | Laminated cylindrical lithium ion battery and fabrication method thereof |
| CN105576294A (en) * | 2016-01-08 | 2016-05-11 | 珠海光宇电池有限公司 | Fabrication method of laminated trapezoid battery core and laminated battery core |
| CN108604710A (en) * | 2016-02-29 | 2018-09-28 | 松下知识产权经营株式会社 | Laminated type non-aqueous electrolyte secondary battery |
| CN108604710B (en) * | 2016-02-29 | 2022-03-04 | 松下知识产权经营株式会社 | Laminated nonaqueous electrolyte secondary battery |
| CN107305942A (en) * | 2016-04-22 | 2017-10-31 | 北京好风光储能技术有限公司 | A kind of takeup type negative plate and battery core and lithium slurry battery provided with the negative plate |
| CN107305942B (en) * | 2016-04-22 | 2020-04-14 | 北京好风光储能技术有限公司 | Winding type negative plate, battery cell with same and lithium slurry battery |
| CN109585773A (en) * | 2017-09-28 | 2019-04-05 | 江苏津谊新能源科技有限公司 | A method of prevent inside lithium ion cell short-circuit |
| WO2022126634A1 (en) * | 2020-12-18 | 2022-06-23 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and manufacturing system therefor, battery cell, battery and electrical device |
| WO2024036752A1 (en) * | 2022-08-18 | 2024-02-22 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and electrical apparatus |
| CN115064757A (en) * | 2022-08-19 | 2022-09-16 | 江苏时代新能源科技有限公司 | Battery cell, battery and power consumption device |
| CN115064757B (en) * | 2022-08-19 | 2022-12-06 | 江苏时代新能源科技有限公司 | Battery cell, battery and power consumption device |
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Application publication date: 20140212 |