CN201081817Y - Pole plate of coiling lithium cell core - Google Patents
Pole plate of coiling lithium cell core Download PDFInfo
- Publication number
- CN201081817Y CN201081817Y CNU2007200486674U CN200720048667U CN201081817Y CN 201081817 Y CN201081817 Y CN 201081817Y CN U2007200486674 U CNU2007200486674 U CN U2007200486674U CN 200720048667 U CN200720048667 U CN 200720048667U CN 201081817 Y CN201081817 Y CN 201081817Y
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- China
- Prior art keywords
- current collector
- polar
- pole piece
- polar ear
- negative
- Prior art date
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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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- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model relates to the lithium battery technical field, in particular to an improvement of a pole piece structure of a winding type lithium battery electric core. The pole piece comprises a current collector, the polar material layer coated on the current collector and the polar ear arranged on the current collector, wherein the polar ear is arranged on the longitudinal side face of the current collector and protrudes outwards; meanwhile, the polar ear which is made by die cutting the current collector is formed into an integral structure with the current collector; moreover, one or more polar ears can extend from the longitudinal side face of the current collector. The polar ear(s) which is (are) arranged on the side face of the current collector of the pole piece is (are) made by integral die cutting during processing the current collector, thereby fully increasing the utilization space of the active material coated on the positive electrode and the negative electrode of the current collector; moreover, the thickness of the aluminum bar and nickel bar of a positive polar ear and a negative polar ear inside a winding core is reduced, thereby increasing the electric core capacity of the battery; meanwhile, the positive polar ear and the negative polar ear of the pole piece are precisely positioned outside the winding core after winding, which ensures identical center distance of the polar ears of the battery electric core. In addition, the polar ears have the characteristics of a simple structure and strong practicality.
Description
Technical field
The utility model relates to technical field of lithium batteries, relates to the improvement of the pole piece structure of coiled lithium battery cell particularly.
Background technology
Along with the development of lithium-ion electric pool technology, its cost performance improves constantly, and causes lithium battery by all trades and professions extensive use.Nearly one or two years,, indexs such as the capacity of lithium battery, charge-discharge performance are also had higher requirement along with the develop rapidly of mechanics of communication.And the size of lithium battery capacity, not only the polarity dope layer with collector is relevant, and also the connected mode with pole-piece pole-ear is relevant.
Electric core structure of lithium battery can be divided into stacked and takeup type, forms and its basic structure of takeup type electricity core reeled mutually by positive plate, barrier film, negative plate.The pole piece of at present general coiled lithium battery cell as shown in Figure 1, it is an a pair of positive plate and a negative plate in the coiled battery electricity core, the left side be negative plate 1, the right be positive plate 1 '.Negative plate is made up of the negative current collector that is coated with negative polarity coating 2, and negative electrode lug 3 is arranged on the end of negative current collector; Same positive plate by be coated with positive polarity coating 2 ' plus plate current-collecting body form anode ear 3 ' also the be arranged on end of plus plate current-collecting body.The end that the positive and negative collector of positive and negative lug is set does not have the polarity coating, and just the space that utilizes of active material has been occupied in the setting area of lug, and the capacity that has influenced lithium battery improves.Moreover the positive and negative lug of takeup type electricity core is in electric in-core portion the inside, sticks the nearly 0.17mm of thickness that adds aluminum strip and nickel bar behind the two-layer insulating cement again, because the restriction of thickness also is difficult to make the capacity of lithium battery to promote.Therefore existing coiled lithium battery cell exists that electric in-core resistance is big, capacity is done to be got on, locate not accurate enough, efficient is low, the defective of winding quality consistency difference.
The utility model content
Technical problem to be solved in the utility model provides a kind of simple in structure, lug accurate positioning and can improve the pole piece of the coiled lithium battery cell of the back lithium battery capacity of reeling.
For solving the problems of the technologies described above, the technical scheme that the utility model is realized is: the pole piece that designs a kind of coiled lithium battery cell, include the lug that is provided with on the polar material layer that applies on collector, the collector and the collector, described lug is arranged on collector length and protrudes on the side and outwards.
Described lug is by making collector is die-cut, and lug and collector are an overall structure.Length can be extended one or more lugs on the collector on the side.
The utility model has following remarkable result compared to existing technology: pole piece provided by the utility model, lug are arranged on the side of pole piece collector, and one is die-cut during by the processing collector forms, and has fully promoted collection
The positive and negative electrode active material utilizes the space on the fluid, can reduce positive and negative lug aluminum strip and the nickel bar thickness in volume core the inside, improve the electric core capacity of battery, the positive and negative lug of pole piece is in volume core outside after reeling simultaneously, its accurate positioning can make the lug centre-to-centre spacing unanimity of battery battery core.Lug of the present utility model has simple in structure, practical.
Description of drawings
Fig. 1 is the structural representation of existing pole piece; Fig. 2 is the structural representation of the utility model embodiment 1;
Fig. 3 is the structural representation of the utility model embodiment 2.
Embodiment
The utility model is described in further detail below in conjunction with specific embodiment.
Referring to Fig. 2, a kind of pole piece of coiled lithium battery cell comprises positive plate and negative plate, the left side be negative plate 1, the right be positive plate 1 '.Negative plate comprises negative current collector, is coated in negative polarity coating 2 and negative electrode lug on the negative current collector, negative electrode lug 3 is arranged on negative current collector length to the side, and stretch out, negative electrode lug and negative current collector are an overall structure, and negative electrode lug is made by the anticathode collector is die-cut.In like manner, positive plate 1 ' by plus plate current-collecting body, be coated in positive polarity coating 2 on the positive collector ' and anode ear 3 ' form.Also by die-cut made to plus plate current-collecting body, anode ear extends out to the side along anodal length of a film anode ear.
When adopting the pole piece of present embodiment to roll electric core, negative plate is inserted volume pin volume half-turn earlier, and carry out up and down at volume pin front edge negative electrode lug that doubling overlaps, and then the positive plate tail end is inserted the negative plate the inside of having spooled half-turn, allowed lug end pole piece ending.
Referring to Fig. 3, a kind of pole piece of coiled lithium battery cell comprises positive plate and negative plate, the left side be negative plate 1, the right be positive plate 1 '.Three negative electrode lugs 3 that on the side, extend in the length of negative plate, corresponding length at positive plate on the side, also extend three anode ears 3 '.On the pole piece collector, can arrange spacing between lug according to the coiling needs during die-cut a plurality of lug.Extend three or a plurality of lug in the pole piece side, the overlapping external lug of welding that can make of lug is more firm during coiling.
Enumerated the situation of extending one or three lug on the pole piece in the foregoing description, the number of lug is unrestricted in the actual production, can be adjusted at the quantity of die-cut lug on the collector according to actual conditions.
The pole piece of coiled lithium battery cell provided by the utility model is simple in structure, and is easy to process and can effectively improve the capacity of battery battery core.
Claims (4)
1. the pole piece of a coiled lithium battery cell includes the lug that is provided with on the polar material layer that applies on collector, the collector and the collector, and it is characterized in that: the length of described collector is provided with the lug of evagination to the side.
2. the pole piece of coiled lithium battery cell according to claim 1 is characterized in that: described by being an overall structure to die-cut lug of making of collector and collector.
3. the pole piece of coiled lithium battery cell according to claim 2, it is characterized in that: described collector length is extended a lug on the side.
4. the pole piece of coiled lithium battery cell according to claim 2, it is characterized in that: described collector length is extended two lugs at least on the side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200486674U CN201081817Y (en) | 2007-02-09 | 2007-02-09 | Pole plate of coiling lithium cell core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200486674U CN201081817Y (en) | 2007-02-09 | 2007-02-09 | Pole plate of coiling lithium cell core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201081817Y true CN201081817Y (en) | 2008-07-02 |
Family
ID=39615481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200486674U Expired - Lifetime CN201081817Y (en) | 2007-02-09 | 2007-02-09 | Pole plate of coiling lithium cell core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201081817Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010111852A1 (en) * | 2009-03-31 | 2010-10-07 | 深圳市吉阳自动化科技有限公司 | Battery pole plate manufacturing method, battery pole plate and battery |
| CN102376984A (en) * | 2010-08-25 | 2012-03-14 | 惠州泰科立集团股份有限公司 | Ultrathin rechargeable battery and manufacturing process thereof |
| CN110596209A (en) * | 2019-09-04 | 2019-12-20 | 深圳市比克动力电池有限公司 | Symmetric battery, preparation method thereof and method for evaluating lithium ion battery material by using symmetric battery |
| CN114843453A (en) * | 2022-06-09 | 2022-08-02 | 江苏正力新能电池技术有限公司 | Pole piece manufacturing method, pole piece and battery |
-
2007
- 2007-02-09 CN CNU2007200486674U patent/CN201081817Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010111852A1 (en) * | 2009-03-31 | 2010-10-07 | 深圳市吉阳自动化科技有限公司 | Battery pole plate manufacturing method, battery pole plate and battery |
| CN102376984A (en) * | 2010-08-25 | 2012-03-14 | 惠州泰科立集团股份有限公司 | Ultrathin rechargeable battery and manufacturing process thereof |
| CN102376984B (en) * | 2010-08-25 | 2013-07-31 | 惠州泰科立集团股份有限公司 | Ultrathin rechargeable battery and manufacturing process thereof |
| CN110596209A (en) * | 2019-09-04 | 2019-12-20 | 深圳市比克动力电池有限公司 | Symmetric battery, preparation method thereof and method for evaluating lithium ion battery material by using symmetric battery |
| CN114843453A (en) * | 2022-06-09 | 2022-08-02 | 江苏正力新能电池技术有限公司 | Pole piece manufacturing method, pole piece and battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TCL CORPORATION Free format text: FORMER OWNER: HUIZHOU TCL HYPERPOWER BATTERIES INC. Effective date: 20080905 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080905 Address after: Technical center, 8 floor, TCL Arts crafts emporium, No. 6 Goose Road South, Guangdong, Huizhou, China: 516001 Patentee after: TCL Group Co., Ltd. Address before: Guangdong city in Huizhou Province town of Tong Fu Lu Huizhou TCL jinneny Battery Co., zip code: 516005 Patentee before: Huizhou TCL Jinneng Battery Co., Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huizhou TCL Jinneng Battery Co., Ltd. Assignor: TCL Group Co., Ltd. Contract record no.: 2011440020102 Denomination of utility model: Pole plate of coiling lithium cell core Granted publication date: 20080702 License type: Exclusive License Record date: 20110414 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080702 |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: TCL Group Co., Ltd. Document name: Notification of Expiration of Patent Right Duration |