CN201111307Y - Lithium battery - Google Patents
Lithium battery Download PDFInfo
- Publication number
- CN201111307Y CN201111307Y CNU2007201183433U CN200720118343U CN201111307Y CN 201111307 Y CN201111307 Y CN 201111307Y CN U2007201183433 U CNU2007201183433 U CN U2007201183433U CN 200720118343 U CN200720118343 U CN 200720118343U CN 201111307 Y CN201111307 Y CN 201111307Y
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- exposed surface
- lithium battery
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- electrode plate
- aluminium foil
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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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- Cell Electrode Carriers And Collectors (AREA)
Abstract
A lithium battery comprises a cathode electrode plate, an anode electrode plate and a diaphragm between the cathode and anode electrode plates, which has the main structure that both aluminum foil sides of the cathode electrode plate are attached with the cathode active slurry. The two sides of the end of the cathode electrode plate are the exposed face of the aluminum foil, wherein the length of one exposed face is different with the length of the other exposed face. Both copper foil sides of the anode electrode plate are attached with the anode active slurry. The two sides of the end of the anode electrode plate are the exposed face of the copper foil, wherein the length of one exposed face is different with the length of the other exposed face. In the structure of the electrode plate, the thickness difference buffer principle is fully utilized to effectively guarantee the quality of electrode plate quality. Moreover the safety property of the lithium battery is also enhanced.
Description
Technical field
The utility model relates to the lithium battery field, especially relates to a kind of positive and negative electrode chip architecture of lithium battery.
Background technology
The lithium battery stable performance has extended cycle life, and is the battery with high-energy-density, is to be widely used on the digital series products at present.The lithium battery interior primary structure has positive electrical pole piece, negative electricity pole piece and barrier film, and barrier film is to be used to isolate positive, negative electrode plate.Lithium battery for the coiling processing type, the characteristics of its positive and negative electrode electrode slice be long and approach, material is soft, in the course of processing, lose easily, particularly in the process of roll-in electrode slice, very easily produce part or occur serious impression on the surface at blank position, thereby cause electrode slice to cancel or the lithium battery safety problem occurs.
Summary of the invention
The purpose of this utility model provides a kind of lithium battery that improves the positive and negative electrode chip architecture that has, make the positive, negative electrode plate after the improvement produce thickness difference, thereby when the electrode slice roll-in, play cushioning effect, overcome the deficiency that existing lithium battery positive, negative electrode plate exists preferably.
The realization the technical solution of the utility model is: this lithium battery comprises the barrier film between positive electrical pole piece, negative electricity pole piece and the positive, negative electrode plate, its primary structure is to adhere to anodal active slurry on the aluminium foil two sides of positive electrical pole piece, its two sides, end is the aluminium foil exposed surface, and wherein an exposed surface length is different with another side exposed surface length; The negative electrode active slurry is adhered on Copper Foil two sides at the negative electricity pole piece, and two sides, one end is the Copper Foil exposed surface, and wherein an exposed surface length is different with another side exposed surface length.
This technical scheme also comprises:
The two sides length difference of described aluminium foil or Copper Foil exposed surface is the 1-3 millimeter.
The two sides length of described aluminium foil or Copper Foil exposed surface is respectively the 3-7 millimeter.
Described positive electrical pole piece also includes the 3rd aluminium foil exposed surface.
Described the 3rd aluminium foil exposed surface is positioned at volume core outer end.
Described positive electrical pole piece also includes the 4th aluminium foil exposed surface.
Described the 4th aluminium foil exposed surface is used to wrap up the Copper Foil exposed surface of negative electricity pole piece.
The length of described the 3rd aluminium foil exposed surface is the 50-100 millimeter.
The length of described the 4th aluminium foil exposed surface is the 15-25 millimeter.
The aluminium foil of described positive, negative electrode plate or Copper Foil exposed surface can soldering polar ears.
The beneficial effect that the utlity model has: by improving the positive and negative electrode chip architecture, solved and in roll-in electrode slice process, very easily produced part or occur serious impression phenomenon on the surface, effectively guaranteed the electrode slice quality, improved the lithium battery security performance, have simple in structure, cost is low and characteristics such as handling ease.
Description of drawings
Fig. 1 is a negative electrode chip architecture front view of the present utility model.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is an anode electrode chip architecture front view of the present utility model.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is Fig. 3 upward view.
Positive and negative electrode electrode slice one end exposed surface correspondence position schematic diagram when Fig. 6 is the utility model coiling.
Among the figure: 1 positive electrical pole piece; 2 barrier films; 3 negative electricity pole pieces; E, F Copper Foil exposed surface; A1, A2, C, D aluminium foil exposed surface.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
As shown in the figure, this lithium battery mainly is made up of positive electrical pole piece 1, negative electricity pole piece 2, barrier film 3 and aluminum hull, cover plate, electrolyte etc.; Wherein electrode film 1 includes the aluminium foil as the electrode film collector, adheres to anodal active slurry on the aluminium foil two sides, and electrode film 1 includes aluminium foil exposed surface everywhere, is respectively A1, A2, C, D; Negative electrode plate 3 includes the Copper Foil as the negative electrode plate collector, adheres to the negative electrode active slurry on the Copper Foil two sides, and negative electrode plate 3 includes two place's Copper Foil exposed surfaces, is respectively E, F.
Above-mentioned positive, negative electrode plate is a rectangle, and its width is 8 millimeters-100 millimeters, and its length is 150 millimeters-1500 millimeters and does not wait.
The exposed surface of aluminium foil everywhere of above-mentioned electrode film 1 is distributed in the aluminium foil two sides respectively, be every each two place, wherein place's correspondence wraps the exposed surface position of negative electrode plate, one place is through after reeling, be in the outermost layer of volume core, its length range is the 50-150 millimeter, wherein has two places to be distributed in the two sides of aluminium foil one end respectively, its size range is the 3-7 millimeter, and the short 2-3 millimeter that differs of two directors.The exposed surface everywhere of electrode film 1 can be used for welding positive pole ear.
Two place's Copper Foil exposed surfaces of above-mentioned negative electrode plate 3 are distributed in the two sides of Copper Foil one end respectively, i.e. every each place, and two places position correspondence is distributed in the same position on Copper Foil two sides, and its size range is the 3-7 millimeter, and the short 2-3 millimeter that differs of two directors.The exposed surface of negative electrode plate 3 can be used for welding negative lug.
The Copper Foil of above-mentioned electrode slice collector or aluminum foil thickness are at the 10-25 micron.
The exposed surface length of electrode slice one end differs the 2-3 millimeter, the thickness difference of folded row has in order just appearred on the electrode slice thickness like this, be respectively: full space bit thickness (electrode slice collector thickness), half space bit thickness (electrode slice collector thickness adds the thickness that is attached with the electrode slice active material of one side) and through thickness (electrode slice collector thickness adds the thickness that is attached with the electrode slice active material on two sides), this is for electrode slice can be thin because of the electrode slice collector when the roll-in, and electrode slice thickness changes suddenly and causes part or obvious impression occurs.In a single day obvious impression appears in electrode slice, it is ultra-thin that its essence is exactly the exposed position of pole piece, and part, and then cause the lithium battery internal resistance big or when the big multiplying power discharging of lithium battery, the high temperature that the tip location of pole piece connecting portion produces, and the fusing connecting portion, safety problem such as cause that finally the lithium battery bulging is exploded even.
Jia Gong positive, negative electrode plate in a manner described, through welding positive and negative electrode lug on electrode slice, form battery again after barrier film is reeled, conventional lithium battery such as the aluminum hull of packing into successively then, baking battery, notes electrolyte, charging, partial volume manufacturing process is the lithium battery finished product.
By adopting, be not easy to produce part or serious impression phenomenon is arranged, thereby improve product percent of pass, and can increase the coefficient of safety of lithium battery with upper type processing battery electrode sheet.
Embodiment
By rubbing method at present commonly used with on the two sides of positive and negative electrode active material attached to positive, negative electrode plate.Its negative electrode plate includes two exposed surfaces, be distributed in the top on the two sides of electrode slice collector respectively, and in correspondence with each other, these two exposed surface position lengths are the 3-5 millimeter, and differ the 1-2 millimeter, it is 5 millimeters that this battery structure preferably adopts the E face, and the F face is 3 millimeters, and two length differences are 2 millimeters, all the other positions all are attached with negative electrode active material, with coated electrode slice, be the roll squeezer rolling wheel set of 65MPa by pressure earlier with exposed surface, promptly finish roll process.Electrode film includes four exposed surface positions, and wherein two positions are distributed in the top on the two sides of electrode slice collector respectively, and in correspondence with each other, these two position lengths are the 3-5 millimeter, and differ the 1-2 millimeter, and it is 3 millimeters that this battery structure preferably adopts the A1 face, the A2 face is 5 millimeters, two position length differences are 2 millimeters, and position C, its length range are the 15-25 millimeter, 18 millimeters of preferred employings, position D, its length range are the 50-100 millimeter, preferably adopt 75 millimeters.With coated electrode slice, be the roll squeezer rolling wheel set of 85MPa by pressure earlier with the exposed surface position, promptly finish roll process.Finish the positive, negative electrode plate after the roll-in, positive and negative lug in the welding, electrode film, barrier film, negative electrode plate are stacked the coiling core in order together, with negative electrode plate one end, it is the E/F position, correspondence is inserted on the C position of electrode film, and the C position will wrap the exposed surface position of negative electrode plate fully, the rich rolling core of the volume of taking advantage of a situation, to roll up core pack into aluminum hull, welded cover plate then, the soldering and sealing lithium battery, conventional lithium battery such as baking lithium battery, notes electrolyte, charging, partial volume manufacturing process promptly finishes the manufacturing of lithium battery.
Claims (10)
1. a lithium battery comprises the barrier film between positive electrical pole piece, negative electricity pole piece and the positive, negative electrode plate, it is characterized in that
A. adhere to anodal active slurry on the aluminium foil two sides of positive electrical pole piece, its two sides, end is the aluminium foil exposed surface, and wherein an exposed surface length is different with another side exposed surface length;
B. adhere to the negative electrode active slurry on the Copper Foil two sides of negative electricity pole piece, its two sides, end is the Copper Foil exposed surface, and wherein an exposed surface length is different with another side exposed surface length.
2. lithium battery as claimed in claim 1, the two sides length difference that it is characterized in that described aluminium foil or Copper Foil exposed surface is the 1-3 millimeter.
3. lithium battery as claimed in claim 1 is characterized in that the two sides length of described aluminium foil or Copper Foil exposed surface is respectively the 3-7 millimeter.
4. lithium battery as claimed in claim 1 is characterized in that described positive electrical pole piece also includes the 3rd aluminium foil exposed surface.
5. lithium battery as claimed in claim 4 is characterized in that described the 3rd aluminium foil exposed surface is positioned at volume core outer end.
6. lithium battery as claimed in claim 1 is characterized in that described positive electrical pole piece also includes the 4th aluminium foil exposed surface.
7. lithium battery as claimed in claim 6 is characterized in that described the 4th aluminium foil exposed surface is used to wrap up the Copper Foil exposed surface of negative electricity pole piece.
8. lithium battery as claimed in claim 4, the length that it is characterized in that described the 3rd aluminium foil exposed surface is the 50-100 millimeter.
9. lithium battery as claimed in claim 6, the length that it is characterized in that described the 4th aluminium foil exposed surface is the 15-25 millimeter.
10. lithium battery as claimed in claim 1 is characterized in that the aluminium foil of described positive, negative electrode plate or Copper Foil exposed surface connect lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201183433U CN201111307Y (en) | 2007-01-29 | 2007-01-29 | Lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201183433U CN201111307Y (en) | 2007-01-29 | 2007-01-29 | Lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201111307Y true CN201111307Y (en) | 2008-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201183433U Expired - Fee Related CN201111307Y (en) | 2007-01-29 | 2007-01-29 | Lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201111307Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916162A (en) * | 2012-10-16 | 2013-02-06 | 广东凯德能源科技有限公司 | Lithium battery positive-negative plate structure |
| CN105261781A (en) * | 2015-10-28 | 2016-01-20 | 广东烛光新能源科技有限公司 | Electrochemical cell and preparation method thereof |
| CN106784787A (en) * | 2016-12-02 | 2017-05-31 | 河北绿草地新能源股份有限公司 | Rear-earth-doped nickel-cobalt-manganese ternary material temperature lithium ion battery wide and its production method |
| CN110350143A (en) * | 2019-07-18 | 2019-10-18 | 南京海泰纳米材料有限公司 | A kind of technique of metallic lithium surface processing |
-
2007
- 2007-01-29 CN CNU2007201183433U patent/CN201111307Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916162A (en) * | 2012-10-16 | 2013-02-06 | 广东凯德能源科技有限公司 | Lithium battery positive-negative plate structure |
| CN102916162B (en) * | 2012-10-16 | 2015-04-08 | 广东凯德能源科技有限公司 | Lithium battery positive-negative plate structure |
| CN105261781A (en) * | 2015-10-28 | 2016-01-20 | 广东烛光新能源科技有限公司 | Electrochemical cell and preparation method thereof |
| CN106784787A (en) * | 2016-12-02 | 2017-05-31 | 河北绿草地新能源股份有限公司 | Rear-earth-doped nickel-cobalt-manganese ternary material temperature lithium ion battery wide and its production method |
| CN110350143A (en) * | 2019-07-18 | 2019-10-18 | 南京海泰纳米材料有限公司 | A kind of technique of metallic lithium surface processing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN BANGKAI NEW ENERGY CO., LTD. Free format text: FORMER NAME: SHENZHEN BANGKAI ELECTRONICS CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Guangdong province Shenzhen city Baoan District town of Longhua Dalang Village Huarong Road Hong Fu Industrial Zone, zip code: 518000 Patentee after: Shenzhen B & K Rechargeable Battery Inc. Address before: Guangdong Province, Shenzhen City, Longhua Province town of Baoan District red head village side, zip code: 518000 Patentee before: Bangkai Electronic Co., Ltd., Shenzhen City |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080903 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080903 Termination date: 20160129 |
|
| EXPY | Termination of patent right or utility model |