CN201087907Y - Negative electrode piece structure of lithium battery - Google Patents
Negative electrode piece structure of lithium battery Download PDFInfo
- Publication number
- CN201087907Y CN201087907Y CNU2007201191425U CN200720119142U CN201087907Y CN 201087907 Y CN201087907 Y CN 201087907Y CN U2007201191425 U CNU2007201191425 U CN U2007201191425U CN 200720119142 U CN200720119142 U CN 200720119142U CN 201087907 Y CN201087907 Y CN 201087907Y
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- Prior art keywords
- negative electrode
- electrode sheet
- positive
- negative
- lithium battery
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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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Abstract
The utility model relates to a lithium battery negative electrode sheet structure, which comprises a clutch gold and dressing attached on the clutch gold. The improved part comprises that a blank groove without dressing is arranged in the negative electrode sheet, and a positive electrode sheet pole lug is arranged in the bland groove. In the improved negative electrode sheet structure, when the positive and the negative electrode sheets are wound, the positive electrode pole lug and the negative electrode pole lug are respectively embedded into the corresponding grooves of the negative electrode sheet and the positive electrode sheet, causing that when the first layer is wound the plane is flat, thereby ensuring the uniformity of the followed winded faces. Finally, the surface of a winding core and a soft packaged lithium battery is ensured to be flat, and the thickness is ensured to be consistent.
Description
Technical field
The utility model relates to lithium battery structure, refers in particular to a kind of structure of negative electrodes for lithium batteries sheet.
Background technology
At present, in all kinds lithium battery, flexible package lithium cell is with high-energy-density, and is in light weight, and the advantage that form is made by oneself is used in the mobile digital series products widely.Because of it is packaged as soft composite membrane, in battery operated, its thickness can be in fluctuation among a small circle, thus market again to its integral thickness consistent require extremely strict.The inner primary structure of flexible package lithium cell 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.At the flexible-packed battery of the coiling mode of production, in actual production process, need align negative electrode plate and carry out deep processing, promptly, the dressing on the electrode slice is scraped off, to reach surfacing, the requirement of consistency of thickness according to corresponding lug position on the electrode slice.
Summary of the invention
The purpose of this utility model provides a kind of structure of improved negative electrode plate, by in negative electrode plate, be provided with can built-in electrode film lug blank groove, make when adaptive electrode film is reeled, can guarantee the consistency of thickness of its each layer of volume core, and finally guarantee to roll up core and flexible package lithium cell surfacing, consistency of thickness has solved the defective that existing positive and negative electrode sheet exists preferably when reeling.
The realization the technical solution of the utility model is: this structure comprises Copper Foil and dressing attached thereto, and improvement part is included in the blank groove that no dressing is set in the negative electrode plate, the built-in electrode film lug of this blank groove.
This technical scheme also comprises:
The blank recess width of described negative electrode plate is than short 2～6 millimeters of the blank recess width of electrode film.
Positive pole ear when the blank groove location correspondence of described negative electrode plate is reeled.
The beneficial effect that the utlity model has: when the positive and negative electrode sheet is reeled, its positive and negative electrode sheet lug respectively is inlaid in the negative electrode film corresponding grooves, make when the coiling ground floor, its plane is smooth, guaranteed the regularity of back coiling face, finally guarantee to roll up core and flexible package lithium cell surfacing, consistency of thickness.
Description of drawings
Fig. 1 is the electrode film structural representation.
Fig. 2 is the negative electrode plate structural representation.
Fig. 3 is the vertical view of Fig. 1.
Positive and negative electrode electrode slice structure and mutual correspondence position schematic diagram when Fig. 4 is coiling.
Among the figure: 1 negative electricity pole piece, 11 Copper Foils, 12 negative pole dressing, 2 barrier films, 3 positive electrical pole pieces, 31 aluminium foils, 32 anode dressing A1 positive plate lugs, the blank groove of B1 electrode film, C1 aluminium foil exposed surface; A2 negative plate lug, the blank groove of B2 negative electrode plate, (C2, E) Copper Foil exposed surface.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
This lithium battery belongs to flexible-packed battery, comprise negative electricity pole piece 1, positive electrical pole piece 3, barrier film 2, wherein electrode slice 1 is made of Copper Foil 11 and negative pole dressing 12, and its two ends are respectively equipped with negative plate lug A2 and aluminium foil exposed surface C2, E, and the blank groove B2 of negative electrode plate; Electrode slice 3 is made of aluminium foil 31 and anode dressing 32, and its two ends are respectively equipped with positive plate lug A1 and aluminium foil exposed surface C1, and the blank groove B1 of electrode film; Be barrier film 2 between electrode slice 1 and the electrode slice 2.
The thick phenomenon in lug position appears in coiling in order to solve, negative electrode plate 1 is improved, promptly on negative electrode plate 1 surface, corresponding positive pole ear A1 position during with coiling, scrape off corresponding negative pole dressing 12, make it to form blank groove (exposing Copper Foil 11) B2.
In practical operation, consider that lug also has 0.8～1.5 millimeter thickness, its thickness can be thicker than dressing thickness, therefore in coiling, the thick phenomenon in lug position can occur, thereby cause dumbbell shape battery profile.Now take in the positive and negative electrode sheet, each lug opposite position scrapes off the measure of dressing, and when reeling, positive and negative lug is inlaid in the other side's corresponding groove accordingly, thereby lowered volume core lug position thickness, guaranteed that the volume wicking surface is smooth and the flexible package lithium cell overall appearance is smooth.
Embodiment
Be example with E383450 model flexible package lithium cell below, in conjunction with the accompanying drawings, the description operation process.The lug A1 two sides of its electrode film is 6 mm wides, and anode dressing 32 is 9 mm wides between A1 and the B1, and the C1 two sides is 2 mm wides, and B1 is 20 mm wides; The lug A2 two sides of its negative plate is 3 mm wides, and negative pole dressing 12 width are than more than 1 2～4 millimeters of corresponding D between A2 and the B2, and this example is preferably 4 millimeters, promptly 13 millimeters, C2 is 2 millimeters, and E is 69 millimeters, B2 is shorter 2～6 millimeters than electrode film B1, and this example is preferably 4 millimeters, promptly 16 millimeters.When reeling, the lug end of electrode film is inserted in covered barrier film, and the negative electrode plate of bending, embed corresponding B1 position; Its corresponding negative electrode plate lug is with regard in the corresponding embedding electrode film groove.And then coiling positive and negative electrode sheet, finish until coiling, according to normal flexible-packed battery production process, finish production procedure again, promptly form the flexible package lithium cell of surfacing.
Claims (3)
1. a negative electrodes for lithium batteries chip architecture comprises Copper Foil and dressing attached thereto, it is characterized in that described structure is included in the blank groove that is provided with in the negative electrode plate, the built-in electrode film lug of this blank groove.
2. negative electrodes for lithium batteries chip architecture as claimed in claim 1, the blank recess width that it is characterized in that described negative electrode plate is than short 2～6 millimeters of the blank recess width of electrode film.
3. negative electrodes for lithium batteries chip architecture as claimed in claim 1, the positive pole ear when it is characterized in that corresponding coiling of blank groove location of described negative electrode plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201191425U CN201087907Y (en) | 2007-03-23 | 2007-03-23 | Negative electrode piece structure of lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201191425U CN201087907Y (en) | 2007-03-23 | 2007-03-23 | Negative electrode piece structure of lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201087907Y true CN201087907Y (en) | 2008-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201191425U Expired - Fee Related CN201087907Y (en) | 2007-03-23 | 2007-03-23 | Negative electrode piece structure of lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201087907Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034961A (en) * | 2009-10-01 | 2011-04-27 | 三星Sdi株式会社 | Electrode assembly and rechargeable battery having the same |
| CN103682250A (en) * | 2013-11-25 | 2014-03-26 | 广东凯德能源科技有限公司 | Lithium ion battery pole piece structure resisting to high-strength vibration and soldering method for lithium ion battery pole piece structure |
| US10541441B2 (en) | 2014-01-17 | 2020-01-21 | Ningde Amperex Technology Limited | Lithium ion battery having desirable safety performance |
| CN110729447A (en) * | 2019-10-09 | 2020-01-24 | 惠州锂威新能源科技有限公司 | Battery cell pole piece and battery cell |
| CN111527635A (en) * | 2017-12-25 | 2020-08-11 | 松下知识产权经营株式会社 | Secondary battery |
| US12009483B2 (en) | 2015-08-31 | 2024-06-11 | Ningde Amperex Technology Limited | Secondary battery cell and winding formation system thereof |
| WO2024139358A1 (en) * | 2022-12-26 | 2024-07-04 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery and electrical apparatus |
-
2007
- 2007-03-23 CN CNU2007201191425U patent/CN201087907Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034961A (en) * | 2009-10-01 | 2011-04-27 | 三星Sdi株式会社 | Electrode assembly and rechargeable battery having the same |
| CN102034961B (en) * | 2009-10-01 | 2014-11-05 | 三星Sdi株式会社 | Electrode assembly and rechargeable battery having the same |
| CN103682250A (en) * | 2013-11-25 | 2014-03-26 | 广东凯德能源科技有限公司 | Lithium ion battery pole piece structure resisting to high-strength vibration and soldering method for lithium ion battery pole piece structure |
| CN103682250B (en) * | 2013-11-25 | 2015-11-18 | 广东凯德能源科技有限公司 | A kind of electrodes of lithium-ion batteries structure of anti-high-strength vibration and welding method thereof |
| US10541441B2 (en) | 2014-01-17 | 2020-01-21 | Ningde Amperex Technology Limited | Lithium ion battery having desirable safety performance |
| US11923498B2 (en) | 2014-01-17 | 2024-03-05 | Ningde Amperex Technology Limited | Lithium-ion battery having desirable safety performance |
| US12009483B2 (en) | 2015-08-31 | 2024-06-11 | Ningde Amperex Technology Limited | Secondary battery cell and winding formation system thereof |
| CN111527635A (en) * | 2017-12-25 | 2020-08-11 | 松下知识产权经营株式会社 | Secondary battery |
| US12237495B2 (en) | 2017-12-25 | 2025-02-25 | Panasonic Intellectual Property Management Co., Ltd. | Secondary battery |
| CN110729447A (en) * | 2019-10-09 | 2020-01-24 | 惠州锂威新能源科技有限公司 | Battery cell pole piece and battery cell |
| WO2024139358A1 (en) * | 2022-12-26 | 2024-07-04 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery and electrical apparatus |
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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 B+K RECHARGEABLE BATTERY, INC. Free format text: FORMER NAME: SHENZHEN B+K TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 518000 Shenzhen city Baoan District town of Longhua Dalang Village Huarong Road Hong Fu Industrial Zone Patentee after: Shenzhen B & K Rechargeable Battery Inc. Address before: 518000, Guangdong Province, Shenzhen Town, Longhua Baoan District red head village side Patentee before: Bangkai Electronic Co., Ltd., Shenzhen City |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080716 Termination date: 20160323 |