CN100547848C - Winding type soft package lithium ion battery and preparation method thereof - Google Patents
Winding type soft package lithium ion battery and preparation method thereof Download PDFInfo
- Publication number
- CN100547848C CN100547848C CNB2005101212658A CN200510121265A CN100547848C CN 100547848 C CN100547848 C CN 100547848C CN B2005101212658 A CNB2005101212658 A CN B2005101212658A CN 200510121265 A CN200510121265 A CN 200510121265A CN 100547848 C CN100547848 C CN 100547848C
- Authority
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- China
- Prior art keywords
- positive
- negative
- negative electrode
- coiling
- electric core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004804 winding Methods 0.000 title claims abstract description 22
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title description 4
- 230000004888 barrier function Effects 0.000 claims abstract description 22
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000007773 negative electrode material Substances 0.000 claims abstract description 8
- 239000007774 positive electrode material Substances 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a kind of winding type soft package lithium ion battery, comprise electric core, electrolyte and encapsulating film, electric core and electrolyte are enclosed in the encapsulating film; Described electric core comprises the positive/negative plate and the barrier film of overlapping coiling, barrier film separates both between positive/negative plate, the positive and negative electrode active material that described positive and negative plate comprises the positive and negative electrode collector and is coated in positive and negative electrode collector two sides, described electric core also comprises positive and negative lug, respectively the electrode of positive/negative plate is drawn from coiling body; Being positioned at the outermost collector of electrical core coiling body is plus plate current-collecting body, and its end is longer than the end of negative current collector.The present invention also provides the manufacture method of above-mentioned battery.Beneficial technical effects of the present invention is: the plus plate current-collecting body end is extended to outside the negative current collector end, avoided the burr of plus plate current-collecting body end to pierce through barrier film effectively, positive plate and negative plate are contacted and cause short circuit, improved the fail safe of battery.
Description
[technical field]
The present invention relates to lithium battery technology, be specifically related to a kind of winding type soft package lithium ion battery and preparation method thereof.
[background technology]
Conventional winding type soft package lithium ion battery is to adopt aluminum-plastic composite membrane 8 that electric core, electrolyte are sealed and forms as shown in Figure 1.Wherein electric core is reeled and is formed by barrier film 7, positive plate, negative plate, and its septation is kept apart positive plate, negative plate.Positive plate comprises plus plate current-collecting body 1, is coated in 1 liang of lip-deep positive active material 2 of plus plate current-collecting body, also is provided with anode ear 3 on the plus plate current-collecting body; Negative plate comprises negative current collector 4, is coated in 4 liang of lip-deep negative electrode active materials 5 of negative current collector, also is provided with negative electrode lug 6 on the negative current collector.Usually coiling body has two kinds of winding methods: 1, outermost layer is a negative current collector, 2, outermost layer is plus plate current-collecting body.When adopting second kind of winding method, be that outermost layer is when being plus plate current-collecting body, because requirement based on battery security, the coated length of positive active material can not be more than the coated length of negative electrode active material, therefore all is usually to make to be in the outer field plus plate current-collecting body of coiling body 1 terminal the outer field negative current collector of coiling body 4 is terminal lacks than being in.But can produce burr on the plus plate current-collecting body 1 during owing to pole piece trimming, this burr exists can pierce through the hidden danger that barrier film causes the positive/negative plate short circuit.Burr very likely pierces through barrier film and causes internal short-circuit of battery after battery is given a shock, pushes or repeatedly discharges and recharges, thereby reduces battery capacity, even battery is scrapped.
[summary of the invention]
Purpose of the present invention provides a kind of can reduce the influence of anode collection end of body burr, improves winding type soft package lithium ion battery of battery rate of finished products and fail safe and preparation method thereof.
In order to achieve the above object, the technical solution used in the present invention is: a kind of winding type soft package lithium ion battery, comprise electric core, electrolyte and encapsulating film, and electric core and electrolyte are enclosed in the encapsulating film; Described electric core comprises the positive/negative plate and the barrier film of overlapping coiling, barrier film separates both between positive/negative plate, the positive and negative electrode active material that described positive and negative plate comprises the positive and negative electrode collector and is coated in positive and negative electrode collector two sides, described electric core also comprises positive and negative lug, respectively the electrode of positive/negative plate is drawn from coiling body; Being positioned at the outermost collector of electrical core coiling body is plus plate current-collecting body, and its end is longer than the end of negative current collector.
Preferably, described anode ear is arranged on the internal layer of electrical core coiling body.
Preferably, also be wound with at least one circle barrier film on the described outermost plus plate current-collecting body.The present invention also provides the manufacture method of above-mentioned winding type soft package lithium ion battery, comprises the steps:
1) positive and negative plate that will cut overlaps and reels with the barrier film separation;
The positive and negative electrode active material that described positive and negative plate comprises the positive and negative electrode collector and is coated in positive and negative electrode collector two sides, the appropriate location on the described positive and negative electrode collector also are connected with the positive and negative lug that extends along perpendicular to coiling direction;
Make plus plate current-collecting body be positioned at the outside of coiling body during coiling; And the length of control positive and negative electrode collector when cutting, the plus plate current-collecting body end was longer than the end of negative current collector after feasible coiling was finished;
2) the positive and negative electrode collector is terminal fixing, finish the making of electric core;
3) with encapsulating film electric core is encapsulated and fluid injection.
Preferably, step 2) the middle first fixedly end of negative current collector, then will be fixing the barrier film between the positive and negative electrode collector is reeled at least one circle again on electric core body after.
In step 2) in can adopt gummed paper to paste method carry out the fixing of negative current collector end.
Adopt technique scheme, in conjunction with the following embodiment that will describe in detail, beneficial technical effects of the present invention is: the plus plate current-collecting body end is extended to outside the negative current collector end, avoided the burr of plus plate current-collecting body end to pierce through barrier film effectively, positive plate and negative plate are contacted and cause short circuit, improved the fail safe of battery.In addition, barrier film is reeled at least one week on the coiling body top layer, can reach the better fixed effect of coiling body, and effectively alleviate the damage of the burr of plus plate current-collecting body end to aluminum-plastic composite membrane.
Also the present invention is described in further detail in conjunction with the accompanying drawings below by embodiment.
[description of drawings]
Fig. 1 is a kind of existing winding type soft package lithium ion battery winding-structure schematic diagram.
Fig. 2 is a kind of winding type soft package lithium ion battery winding-structure schematic diagram of the present invention.
Fig. 3 is another kind of winding type soft package lithium ion battery winding-structure schematic diagram of the present invention.
[embodiment]
Embodiment one, a kind of winding type soft package lithium ion battery, winding-structure comprise electric core, electrolyte (not shown) and as the aluminum-plastic composite membrane 80 of encapsulating film, electric core and electrolyte are sealed in the aluminum-plastic composite membrane 80 as shown in Figure 2.
The electricity core is reeled and is formed by positive plate, barrier film 70, negative plate, and barrier film 70 is positioned between positive and negative plate both are separated.Positive plate comprises plus plate current-collecting body 10, is coated in the positive active material 20 on 10 liang of surfaces of plus plate current-collecting body, also is provided with anode ear 30 on the plus plate current-collecting body 10, and the position that anode ear 30 is provided with makes it be positioned at the internal layer of electrical core coiling body behind coiling; Negative plate comprises negative current collector 40, is coated in the negative electrode active material 50 on negative current collector two surfaces, also is provided with negative electrode lug 60 on the negative current collector 40.Positive and negative lug is drawn the electrode of positive/negative plate respectively from coiling body; Being positioned at the outermost collector of electrical core coiling body is plus plate current-collecting body 10, and its end 11 is longer than the end 41 of negative current collector 40.
Above-mentioned winding type soft package lithium ion battery can adopt following step manufacturing:
1) positive and negative plate that will cut overlaps and reels with the barrier film separation; Make plus plate current-collecting body be positioned at the outside of coiling body during coiling; And the length of control positive and negative electrode collector when cutting, the plus plate current-collecting body end was longer than the end of negative current collector after feasible coiling was finished;
2) will be fixed on the coiling body surface than the end 41 of short negative current collector with the mode that gummed paper is pasted or glue is pasted earlier, because plus plate current-collecting body is longer, covered the end of negative current collector, and therefore promptly used gummed paper to paste the end that fixes negative current collector and also can not manifest obvious marks on the packaging film surface.And then plus plate current-collecting body end 11 fixed, owing to be positioned at outermost layer, therefore preferably adopt the mode of glue stickup fixedly the time, can finish the making of electric core;
3) with encapsulating film electric core is encapsulated at last, the electrode that lug and encapsulating film is outer is connected and injects electrolyte, makes battery through conventional preliminary filling and formation process then.
With model is that 383450 flexible packing lithium ion battery is an example, is not adopting structure of the present invention, and when promptly coiling body adopted structure shown in Figure 1, the average failure ratio of battery production finished product was 1.3%; And after adopting structure of the present invention, the average failure ratio of battery production finished product is reduced to 0.2%, and rate of finished products has obtained significant raising.
Embodiment two, another kind of winding type soft package lithium ion battery, winding-structure as shown in Figure 3, basic identical among its structure and the embodiment one, just at least one circle 71 of also reeling again on electric core body of the barrier film between outermost layer positive and negative electrode collector 10 and 40 wraps outermost layer plus plate current-collecting body 10 fully.Such structure not only can alleviate the damage of the burr of plus plate current-collecting body end to the aluminum-plastic composite membrane of skin encapsulation, also helps the fixing of electric core body, and realizes easily in actual production.
Should be understood that, with the innermost layer of positive and negative lug design at coiling body, be the coiling body of aluminum plastic film encapsulation for convenience in the above-described embodiments, and positive and negative lug can be arranged on any position of coiling body, can keep the insulation between them to get final product.
Claims (6)
1, a kind of winding type soft package lithium ion battery comprises electric core, electrolyte and encapsulating film, and electric core and electrolyte are enclosed in the encapsulating film; Described electric core comprises the positive/negative plate and the barrier film of overlapping coiling, barrier film separates both between positive/negative plate, the positive and negative electrode active material that described positive and negative plate comprises the positive and negative electrode collector and is coated in positive and negative electrode collector two sides, described electric core also comprises positive and negative lug, respectively the electrode of positive/negative plate is drawn from coiling body, it is characterized in that: being positioned at the outermost collector of electrical core coiling body is plus plate current-collecting body, and its end is longer than the end of negative current collector.
2, winding type soft package lithium ion battery according to claim 1 is characterized in that: described anode ear is arranged on the internal layer of electrical core coiling body.
3, winding type soft package lithium ion battery according to claim 1 and 2 is characterized in that: also be wound with at least one circle barrier film on the described outermost plus plate current-collecting body.
4, a kind of manufacture method of winding type soft package lithium ion battery comprises the steps:
1) positive and negative plate that will cut overlaps and reels with the barrier film separation;
The positive and negative electrode active material that described positive and negative plate comprises the positive and negative electrode collector and is coated in positive and negative electrode collector two sides also is connected with the positive and negative lug that extends along perpendicular to coiling direction on the described positive and negative electrode collector;
Make plus plate current-collecting body be positioned at the outside of coiling body during coiling; And the length of control positive and negative electrode collector when cutting, the plus plate current-collecting body end was longer than the end of negative current collector after feasible coiling was finished;
2) the positive and negative electrode collector is terminal fixing, finish the making of electric core;
3) with encapsulating film electric core is encapsulated and fluid injection.
5, the manufacture method of winding type soft package lithium ion battery according to claim 4, it is characterized in that: step 2) the middle first fixedly end of negative current collector, then will be fixing the barrier film between the positive and negative electrode collector is reeled at least one circle again on electric core body after.
6, according to the manufacture method of claim 4 or 5 described winding type soft package lithium ion batteries, it is characterized in that: in step 2) in the end of negative current collector sticked on the coiling body surface with gummed paper fix.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101212658A CN100547848C (en) | 2005-12-23 | 2005-12-23 | Winding type soft package lithium ion battery and preparation method thereof |
| PCT/CN2006/000066 WO2007071122A1 (en) | 2005-12-23 | 2006-01-17 | A wind type lithium ion battery with a soft package case and a method of manufacture the same |
| HK07110188.4A HK1102156A1 (en) | 2005-12-23 | 2007-09-19 | Coiled soft packaged lithium ion battery and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101212658A CN100547848C (en) | 2005-12-23 | 2005-12-23 | Winding type soft package lithium ion battery and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1988240A CN1988240A (en) | 2007-06-27 |
| CN100547848C true CN100547848C (en) | 2009-10-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101212658A Expired - Fee Related CN100547848C (en) | 2005-12-23 | 2005-12-23 | Winding type soft package lithium ion battery and preparation method thereof |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN100547848C (en) |
| HK (1) | HK1102156A1 (en) |
| WO (1) | WO2007071122A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931104B (en) * | 2009-06-23 | 2013-12-18 | 深圳市比克电池有限公司 | Manufacture method of winding battery |
| CN105186028B (en) * | 2010-02-23 | 2017-08-04 | Tdk株式会社 | The manufacture method of electrochemical appliance and electrochemical appliance |
| CN102222802A (en) * | 2010-04-15 | 2011-10-19 | 深圳市比克电池有限公司 | Method for manufacturing lithium ion battery and rolled core thereof and lithium ion battery |
| CN102244299A (en) * | 2011-06-08 | 2011-11-16 | 曙鹏科技（深圳）有限公司 | Winding battery cell of flexible package battery and manufacturing method thereof as well as lithium battery |
| CN107293805B (en) * | 2016-03-31 | 2023-02-28 | 宁德新能源科技有限公司 | Winding type battery cell and winding needle |
| CN107546404B (en) * | 2016-06-28 | 2024-04-05 | 宁德新能源科技有限公司 | Winding type battery cell |
| KR102654626B1 (en) * | 2016-10-27 | 2024-04-04 | 삼성에스디아이 주식회사 | Secondary battery |
| CN109755461A (en) * | 2017-11-07 | 2019-05-14 | 宁德新能源科技有限公司 | Wind battery core |
| CN117895174A (en) * | 2018-05-25 | 2024-04-16 | 福建巨电新能源股份有限公司 | Lithium ion battery module assembly structure |
| CN109638339A (en) * | 2018-12-21 | 2019-04-16 | 广东维都利新能源有限公司 | A kind of battery and preparation method thereof of positive and negative anodes difference diaphragm bag making |
| CN112117499B (en) * | 2020-09-30 | 2022-07-08 | 珠海冠宇电池股份有限公司 | Battery and method for manufacturing battery |
| CN115312977B (en) * | 2022-08-19 | 2023-09-22 | 厦门海辰储能科技股份有限公司 | Winding battery core, preparation method thereof, battery module, battery pack and electric equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000030742A (en) * | 1998-07-10 | 2000-01-28 | Asahi Chem Ind Co Ltd | Lithium-ion secondary battery element |
| US7335448B2 (en) * | 2002-05-30 | 2008-02-26 | Matsushita Electric Industrial Co., Ltd. | Lithium ion secondary battery |
-
2005
- 2005-12-23 CN CNB2005101212658A patent/CN100547848C/en not_active Expired - Fee Related
-
2006
- 2006-01-17 WO PCT/CN2006/000066 patent/WO2007071122A1/en active Application Filing
-
2007
- 2007-09-19 HK HK07110188.4A patent/HK1102156A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN1988240A (en) | 2007-06-27 |
| HK1102156A1 (en) | 2007-11-09 |
| WO2007071122A1 (en) | 2007-06-28 |
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Effective date of registration: 20160921 Address after: An Zhen Zhongmu County 451470 Henan city of Zhengzhou Province Liu Zheng Qiao Village Patentee after: ZHENGZHOU BIKE BATTERY CO., LTD. Address before: Kwai Chung street Beek Industrial Park in Longgang District of Shenzhen City, Guangdong province 518119 Patentee before: Shenzhen Bak Battery Co., Ltd. |
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Granted publication date: 20091007 Termination date: 20181223 |
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