CN101777641A - Lithium battery cathode plate and preparation method thereof - Google Patents
Lithium battery cathode plate and preparation method thereof Download PDFInfo
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- CN101777641A CN101777641A CN201010111626A CN201010111626A CN101777641A CN 101777641 A CN101777641 A CN 101777641A CN 201010111626 A CN201010111626 A CN 201010111626A CN 201010111626 A CN201010111626 A CN 201010111626A CN 101777641 A CN101777641 A CN 101777641A
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- lithium
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- collecting net
- lithium battery
- currect collecting
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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 invention relates to the technical field of lithium batteries, in particular to a lithium battery cathode plate, which comprises a lithium plate and a collecting plate connected to the lithium plate. The lithium plate is provided with a metal collecting net; a cathode plate body consists of the lithium plate and the metal collecting net; the collecting plate is connected to one end of the cathode plate body; the size of the metal collecting net corresponds to that of the lithium plate; the metal collecting net is overlapped on the single lithium plate or arranged between two lithium plates; and the metal collecting net is embedded into the lithium plate in a laminating way. The cathode plate with the structure can improve the reaction uniformity of active metal lithium in the lithium batteries, improves cathode collecting effect and uniform heat conduction effect, and obviously improves the safety performance of winding type lithium batteries. The cathode plate with the structure can be produced by simple automatic process and improve the production efficiency.
Description
Technical field
The invention belongs to technical field of lithium batteries, be specifically related to the improvement project of cathode of lithium battery structure, and corresponding preparation method.
Background technology
Along with the development of lithium battery technology, its cost performance improves constantly, 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 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.
Summary of the invention
Technical problem to be solved by this invention 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 present invention realizes 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.
But another technical problem to be solved by this invention provides cathode of lithium battery piece preparation method a kind of automatic continuous production, that processing technology is simplified and that can make the coiling type lithium battery fail safe raising of being produced.
The preparation method of described lithium battery cathode plate may further comprise the steps:
1), continuous band-shaped lithium sheet and continuous metal currect collecting net proofreaied and correct the location after, be that one constitutes negative pole lamellar body material by the roll squeezer pressing;
2), according to the size of preparation lithium battery required negative plate, be the lithium sheet of one and the correspondence position riveted joint flow collection sheet of metal currect collecting net in pressing;
3), there is the negative pole lamellar body material of flow collection sheet to be cut into continuous riveted joint and is fit to the negative plate that coiling prepares lithium battery by cutter machine.
The present invention compared with prior art has following remarkable result:
1, lithium battery cathode plate provided by the invention can adopt the simple machining process preparation, and this technology can realize automatic continuous production fully.
2, negative plate integral thickness unanimity of the present invention, 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 negative plate of the present invention 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 a negative plate structural representation of the present invention;
Fig. 3 negative plate course of processing of the present invention schematic diagram.
Embodiment
The invention will be further described 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 currect collecting net 3 of the present invention 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 present invention 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.
Lithium battery cathode plate of the present invention 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 present invention's 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 negative plate of the present invention 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 present invention's 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 invention is particularly suitable for preparing takeup type, stacked lithium battery.
Claims (5)
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.
5. the preparation method of each described lithium battery cathode plate of claim 1～4 may further comprise the steps:
1), continuous band-shaped lithium sheet and continuous metal currect collecting net proofreaied and correct the location after, be that one constitutes negative pole lamellar body material by the roll squeezer pressing;
2), according to the size of preparation lithium battery required negative plate, be the lithium sheet of one and the correspondence position riveted joint flow collection sheet of metal currect collecting net in pressing;
3), there is the negative pole lamellar body material of flow collection sheet to be cut into continuous riveted joint and is fit to the negative plate that coiling prepares lithium battery by cutter machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010111626A CN101777641A (en) | 2010-02-08 | 2010-02-08 | Lithium battery cathode plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010111626A CN101777641A (en) | 2010-02-08 | 2010-02-08 | Lithium battery cathode plate and preparation method thereof |
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| Publication Number | Publication Date |
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| CN101777641A true CN101777641A (en) | 2010-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010111626A Pending CN101777641A (en) | 2010-02-08 | 2010-02-08 | Lithium battery cathode plate and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817882A (en) * | 2018-12-27 | 2019-05-28 | 中国电子科技集团公司第十八研究所 | Thermal battery lithium boron alloy negative electrode assembly and preparation method thereof |
| CN116799150A (en) * | 2023-08-22 | 2023-09-22 | 天津中能锂业有限公司 | Lithium composite electrode and preparation method and application thereof |
-
2010
- 2010-02-08 CN CN201010111626A patent/CN101777641A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817882A (en) * | 2018-12-27 | 2019-05-28 | 中国电子科技集团公司第十八研究所 | Thermal battery lithium boron alloy negative electrode assembly and preparation method thereof |
| CN109817882B (en) * | 2018-12-27 | 2022-03-04 | 中国电子科技集团公司第十八研究所 | Thermal battery lithium boron alloy negative electrode assembly and preparation method thereof |
| CN116799150A (en) * | 2023-08-22 | 2023-09-22 | 天津中能锂业有限公司 | Lithium composite electrode and preparation method and application thereof |
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Application publication date: 20100714 |