CN201576711U - Negative electrode sheet for lithium battery - Google Patents
Negative electrode sheet for lithium battery Download PDFInfo
- Publication number
- CN201576711U CN201576711U CN2010201157801U CN201020115780U CN201576711U CN 201576711 U CN201576711 U CN 201576711U CN 2010201157801 U CN2010201157801 U CN 2010201157801U CN 201020115780 U CN201020115780 U CN 201020115780U CN 201576711 U CN201576711 U CN 201576711U
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- lithium
- sheet
- collecting net
- negative electrode
- 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 the technical field of lithium batteries, particularly to a negative electrode sheet for a lithium battery. The negative electrode comprises a lithium sheet and a current collecting sheet connected on the lithium sheet; a metal current collecting net is arranged on the lithium sheet; the lithium sheet and the metal current collecting net form a negative electrode sheet body; the current collecting sheet is connected at one end of the negative electrode sheet body; the metal current collecting net is the same as the lithium sheet in size, and can be overlapped on one lithium sheet or arranged between two lithium sheets; and the metal current collecting net is embedded into the lithium sheet in a laminating manner. By adopting the structure, the negative electrode sheet can improve the reaction uniformity of active metal lithium in the lithium battery, improve the current collecting effect and uniform heat conducting effect of the negative electrode, and remarkably improve the safety property of winding-type lithium batteries. Besides, the negative electrode sheet with such structure can be completed through simple automatic technology, so that the production efficiency is improved.
Description
Technical field
The utility model belongs to technical field of lithium batteries, is specifically related to the improvement project of cathode of lithium battery structure.
Background technology
Along with the development of lithium battery technology, its cost performance improves constantly, and lithium battery is by all trades and professions extensive use.In recent years, rapid to the increase in demand of coiling type lithium battery, coiling type lithium battery discharge-rate performance demands is improved gradually, battery security becomes the key issue of restriction high power coiling type lithium battery development.
The negative pole of existing coiling type lithium battery is to constitute by installing the strip collector on the lithium battery that is cut into sheet additional, the lithium battery cathode plate for preparing this class formation, need earlier the lithium sheet of rolling is cut into lamellar body according to required size by the cut-parts machine, then by manually 2 doublings of lithium sheet and therebetween the position install strip nickel strap flow collection sheet 1 additional.Referring to shown in Figure 1.In order to be fit to reel, just nickel strap flow collection sheet 1 can extend lithium sheet 2 after lithium sheet termination also needs corner.
Existing coiling type lithium battery negative pole structure exists following defective:
1, the cathode of lithium battery of existing winding-structure is in the exoelectrical reaction process, the collector partial occlusion of inertia the electrochemical reaction of lithium sheet, cause the reaction of lithium sheet each several part inhomogeneous, in reaction near can be on the collector remaining more lithium metal of ending phase, form the lithium isolated island, easily cause potential safety hazard.
2, existing structure since center nickel strap collector different with lithium sheet width, the heat transfer of whole negative pole is inhomogeneous, when the battery high power discharge easily because of conduct heat bad produce danger;
3, the existing structure complicated process of preparation is wayward, is difficult to realize serialization and automatic machinery production.
The utility model content
Technical problem to be solved in the utility model provides a kind of lithium battery cathode plate, and the negative plate of this structure can improve the inhomogeneous and negative pole of lithium sheet surface reaction in the lithium battery and conduct heat inhomogeneous and security hidden trouble that produce.This negative plate structure can become good reaction carriers, improves the negative pole currect collecting effect, strengthens the security performance of lithium battery.
For solving the problems of the technologies described above, the technical scheme that the utility model is realized is:
Design a kind of lithium battery cathode plate, comprise lithium sheet and the flow collection sheet that is connected on the lithium sheet, also be provided with the metal currect collecting net on the lithium sheet, lithium sheet and metal currect collecting net constitute the negative pole lamellar body, and described flow collection sheet is connected an end of negative pole lamellar body.
Metal currect collecting net in the such scheme and lithium sheet sizableness, metal currect collecting net are overlapped on the monolithic lithium sheet or are arranged between two lithium sheets.Described metal currect collecting net is made by heat-conductive characteristic good nickel or stainless steel and other metal materials, and the metal currect collecting net is embedded in the lithium sheet by the pressing mode; Described collector sheet is a nickel strap, and the nickel strap upper punch has to be convenient to and lithium sheet, the good pit that contacts of metal currect collecting net, and the nickel strap flow collection sheet is connected an end of negative plate by the riveted joint mode.
The utility model compared with prior art has following remarkable result:
1, the lithium battery cathode plate that provides of the utility model can adopt the simple machining process preparation, and this technology can realize automatic continuous production fully.
2, the utility model negative plate integral thickness unanimity, the metal currect collecting net is evenly distributed in the lithium sheet, is convenient to produce uniform heat distribution in the battery discharge procedure, helps spread heat and output, reduces because of the irregular potential safety hazard that causes of dispelling the heat.
3, by the cathode of lithium battery of the utility model negative plate preparation in the process of reaction, the reaction of the reactive metal lithium of various piece evenly, can not be blocked because of part metals can not participate in reaction and cause potential safety hazard.
Description of drawings
Fig. 1 is existing coiling type lithium battery negative pole structure schematic diagram;
Fig. 2 is the utility model negative plate structural representation;
Fig. 3 the utility model negative plate course of processing schematic diagram.
Embodiment
The utility model is described in further detail below by embodiment.
Referring to Fig. 2, a kind of lithium battery cathode plate is made of lithium sheet 2, currect collecting net 3 and the flow collection sheet 1 that is connected on lithium sheet and the currect collecting net.
It is made that the utility model currect collecting net 3 is stretched as network structure by metal materials such as good nickel of heat-conductive characteristic or steel.Metal currect collecting net 3 and lithium sheet 2 sizableness, metal currect collecting net 3 is embedded in the lithium sheet 2 by the pressing mode.The metal currect collecting net that the utility model increases in negative plate is identical with lithium sheet overall dimension size, metal currect collecting net and lithium sheet are overlapping to be arranged so that the negative plate monnolithic case is smooth, avoided that nickel strap flow collection sheet and lithium sheet vary in size in the existing negative plate structure, the situation of nickel strap flow collection sheet position meeting evagination, the fail safe that can improve prepared lithium battery.The metal currect collecting net can directly overlappingly be placed on the lithium sheet superimposedly by roll-in and lithium sheet in the actual production, and also can place the metal stretching net between the lithium sheet after the doubling both pressings is one.
The utility model lithium battery cathode plate can earlier with behind continuous band-shaped lithium sheet and the continuous metal currect collecting net correction location, be that one constitutes negative pole lamellar body material by the roll squeezer pressing during preparation by simple automation process preparation; According to the size of the required negative plate of preparation lithium battery, rivet nickel sheet flow collection sheet then at the correspondence position of lithium sheet that is pressed together on one and metal currect collecting net; There is the negative plate material of nickel sheet flow collection sheet to be cut into continuous riveted joint by cutter machine at last and is fit to the negative plate that coiling prepares lithium battery.Preparation technology is referring to Fig. 3.
Above-mentioned preparation method, preparation efficiency height not only, and can avoid in manually-operated process the bad influence in lithium sheet surface has been improved the security performance of battery effectively.The negative plate integral thickness unanimity of the utility model preparation, the metal currect collecting net is evenly distributed in the lithium sheet, is convenient to produce uniform heat distribution in the battery discharge procedure, helps spread heat and output, reduces because of the irregular potential safety hazard that causes of dispelling the heat.And by the cathode of lithium battery of the utility model negative plate preparation in the process of reaction, the reaction of the reactive metal lithium of various piece evenly, can not be blocked because of part metals can not participate in reaction and cause potential safety hazard.
The lithium battery cathode plate of the utility model protection, the whole metal currect collecting net that embeds not only can improve catchment effect on existing negative pole lithium sheet, increases fail safe, and is convenient to continuous automatic production.Lithium battery cathode plate of the present utility model is particularly suitable for preparing takeup type, stacked lithium battery.
Claims (4)
1. a lithium battery cathode plate comprises lithium sheet and the flow collection sheet that is connected on the lithium sheet, it is characterized in that: also be provided with currect collecting net (3) on the lithium sheet (2), lithium sheet and currect collecting net constitute the negative pole lamellar body, and flow collection sheet (1) also is installed on the negative pole lamellar body.
2. lithium battery cathode plate according to claim 1 is characterized in that: described currect collecting net (3) is corresponding with lithium sheet (2) size, and currect collecting net is overlapped on the lithium sheet or is arranged between two lithium sheets.
3. lithium battery cathode plate according to claim 2 is characterized in that: described currect collecting net (3) is made by conduction and good nickel or the steel metal material of heat conductivility, and the metal currect collecting net is embedded in the lithium sheet by the pressing mode.
4. lithium battery cathode plate according to claim 3, it is characterized in that: described flow collection sheet (1) is a nickel strap, the nickel strap upper punch has to be convenient to and lithium sheet (2), the good pit that contacts of metal currect collecting net (3), and the nickel strap flow collection sheet is connected with the negative pole lamellar body by the riveted joint mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201157801U CN201576711U (en) | 2010-02-08 | 2010-02-08 | Negative electrode sheet for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201157801U CN201576711U (en) | 2010-02-08 | 2010-02-08 | Negative electrode sheet for lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201576711U true CN201576711U (en) | 2010-09-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201157801U Expired - Fee Related CN201576711U (en) | 2010-02-08 | 2010-02-08 | Negative electrode sheet for lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201576711U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623670A (en) * | 2011-01-30 | 2012-08-01 | 深圳市艾博尔新能源有限公司 | Lithium metal primary cell negative flake |
| CN103606684A (en) * | 2013-11-20 | 2014-02-26 | 惠州亿纬锂能股份有限公司 | Button cell and button cell current collector |
| CN111129419A (en) * | 2020-01-21 | 2020-05-08 | 瑞海泊(青岛)能源科技有限公司 | Battery tab structure, preparation method thereof and water-based battery |
| CN112447942A (en) * | 2019-08-27 | 2021-03-05 | 北京航空航天大学 | Square lithium metal battery and preparation method thereof |
-
2010
- 2010-02-08 CN CN2010201157801U patent/CN201576711U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623670A (en) * | 2011-01-30 | 2012-08-01 | 深圳市艾博尔新能源有限公司 | Lithium metal primary cell negative flake |
| CN103606684A (en) * | 2013-11-20 | 2014-02-26 | 惠州亿纬锂能股份有限公司 | Button cell and button cell current collector |
| CN103606684B (en) * | 2013-11-20 | 2015-09-30 | 惠州亿纬锂能股份有限公司 | Button cell and button cell current collector |
| CN112447942A (en) * | 2019-08-27 | 2021-03-05 | 北京航空航天大学 | Square lithium metal battery and preparation method thereof |
| CN112447942B (en) * | 2019-08-27 | 2022-04-05 | 北京航空航天大学 | Square lithium metal battery and preparation method thereof |
| CN111129419A (en) * | 2020-01-21 | 2020-05-08 | 瑞海泊(青岛)能源科技有限公司 | Battery tab structure, preparation method thereof and water-based battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20100908 Termination date: 20190208 |