CN202434646U - Lithium iron phosphate battery - Google Patents
Lithium iron phosphate battery Download PDFInfo
- Publication number
- CN202434646U CN202434646U CN2012200430735U CN201220043073U CN202434646U CN 202434646 U CN202434646 U CN 202434646U CN 2012200430735 U CN2012200430735 U CN 2012200430735U CN 201220043073 U CN201220043073 U CN 201220043073U CN 202434646 U CN202434646 U CN 202434646U
- Authority
- CN
- China
- Prior art keywords
- pole piece
- battery
- layer
- iron phosphate
- lithium iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model relates to a lithium iron phosphate battery which is characterized by comprising a battery shell. A positive pole piece and a negative pole piece are disposed in the battery shell. A partition film is disposed between the positive pole piece and the negative pole piece. Micro-pores are distributed on the partition film. A positive pole tab is connected to the positive pole piece and a negative pole tab is connected to the negative pole piece. Independent insulating films are disposed on junction between the positive pole tab and the battery shell and on the junction between the negative pole tab and the battery shell. Electrolyte is disposed in the battery shell. Lithium iron phosphate which is stable in structure, environment-friendly, fine in safety, high in specific capacity, long in circulation life and the like is used as a positive pole layer of the lithium iron phosphate battery, a graphite layer is used as a negative pole layer of the lithium iron phosphate battery, and aluminum-plastic shell which is fine in flexibility is used as soft package of the lithium iron phosphate battery. Accordingly, environmental pollution is reduced, size and mass of the battery is reduced, and mass energy ratio of the battery is increased.
Description
Technical field
The utility model relates to a kind of battery, relates in particular to a kind of ferric phosphate lithium cell.
Background technology
At present; Diversified day by day electronic product is just towards miniaturization, portability, functional diversities development on the market; While is along with the exhaustion day by day of resources such as oil, coal; The electric automobile industry is also constantly being captured market, and is therefore also increasingly high to the performance requirement of lithium ion battery that energy is provided for these products.Require not only that operating voltage is high, fail safe is good, capacity is high, require also simultaneously that it is in light weight, volume is little, promptly the specific energy of battery wants high.Traditional is the lithium ion battery of positive pole with cobalt acid lithium material, can not satisfy comprehensive requirement, the especially fail safe of above-mentioned development, therefore needs to select a kind of better, safe positive electrode.Compare with traditional box hat battery simultaneously, flexible-packed battery is because its shell is softer aluminum plastic film, makes its miniaturization more easily, thereby obtains the lithium battery than high-energy-density.
The utility model content
The purpose of the utility model is exactly the problems referred to above that exist in the prior art in order to solve, and a kind of ferric phosphate lithium cell is provided.
The purpose of the utility model realizes through following technical scheme:
Ferric phosphate lithium cell includes battery case, wherein: be provided with anode pole piece and cathode pole piece in the described battery case; Be provided with membrane layer between described anode pole piece and the cathode pole piece; Be distributed with micropore on the described membrane layer, be connected with positive pole ear on the described anode pole piece, be connected with negative lug on the described cathode pole piece; The junction of described positive pole ear, negative lug and battery case is provided with independently dielectric film, is provided with electrolyte in the said battery case.
Above-mentioned ferric phosphate lithium cell, wherein: described membrane layer is the combined type membrane layer, includes main polypropylene layer, is distributed with polyethylene layer on the described main polypropylene layer, is distributed with secondary polypropylene layer on the described polyethylene layer.
Further, above-mentioned ferric phosphate lithium cell, wherein: described battery case is the aluminum plastic film cover layer.
The advantage of the utility model technical scheme is mainly reflected in: the LiFePO4 of characteristics such as rely on Stability Analysis of Structures, environmental friendliness, fail safe is good, specific capacity is high, have extended cycle life is done positive electrode layer; Rely on the negative electrode layer that graphite linings constitutes; The aluminum plastic film battery case that has good flexibility through use is processed the flexible package ferric phosphate lithium cell; Reduce environmental pollution and significantly reduced volume of battery and quality, thereby improved the specific energy of battery and performance that volumetric specific energy has been improved battery, reduced the battery cost.
Description of drawings
The purpose of the utility model, advantage and characteristics will illustrate through the non-limitative illustration of following preferred embodiment and explain.These embodiment only are the prominent examples of using the utility model technical scheme, and all technical schemes of taking to be equal to replacement or equivalent transformation and forming all drop within the scope of the utility model requirement protection.In the middle of these accompanying drawings,
Fig. 1 is the overall schematic of ferric phosphate lithium cell;
The distribution schematic diagram of Fig. 2 anode pole piece and cathode pole piece.
1 positive pole ear, 2 negative lug
3 dielectric films, 4 battery cases
5 anode pole pieces, 6 cathode pole pieces
7 membrane layers
Embodiment
Like Fig. 1, ferric phosphate lithium cell shown in Figure 2, include battery case 4, it is characterized in that: be provided with anode pole piece 5 and cathode pole piece 6 in the battery case 4 that the utility model adopted.Specifically, between anode pole piece 5 and cathode pole piece 6, be provided with membrane layer 7.Simultaneously, be distributed with micropore on the membrane layer 7.And, for being connected of follow-up electricity consumption device, on anode pole piece 5, be connected with positive pole ear 1.Corresponding is to be connected with negative lug 2 on the cathode pole piece 6 with it.Moreover positive pole ear 1, negative lug 2 are provided with independently dielectric film 3 with the junction of battery case 4, and are provided with electrolyte in the battery case 4.
With regard to the utility model one preferred implementation; For the ease of improving the insulation degree, the membrane layer 7 that the utility model adopts is a combined type membrane layer 7, includes main polypropylene layer; Be distributed with polyethylene layer on the main polypropylene layer, be distributed with secondary polypropylene layer on the polyethylene layer.Simultaneously, for improving firm degree, be the aluminum plastic film cover layer at battery case 4.
Further, in order to improve the operating efficiency of electrolyte, the electrolyte of employing is organic liquid electrolyte, includes among LiPF6 electrolyte, EC, PC, DMC, EMC, the EP one or more.Simultaneously, anode pole piece is the LiFePO4 layer, and cathode pole piece is a graphite linings.
And, for the ease of making the granularity D of LiFePO4 layer
50Be 2-6 μ m, specific surface is 11-15m
2/ g.Corresponding with it is graphite linings granularity D
50Be 16.5-19 μ m, specific surface is 0.8-1.5m
2/ g.
Actual manufacturing situation in conjunction with the utility model; At first, be the LiFePO 4 material of 87%-96%, the conductive agent of 1%-7% and the binding agent of 1%-7% with the quality proportioning, be dispersed in and process anodal creme in the solvent; With the thick aluminium foil of 8-18 μ m is collector; Be applied on the aluminium foil positive and negative uniformly creme and drying, roll, process anode pole piece through roller press.
Then; Be that the thickener of binding agent and 0.5%-5% of conductive agent, the 0.5%-5% of graphite material, the 0.5%-5% of 87%-96% is dispersed in and processes the negative pole creme in the solvent with the quality proportioning; With the thick Copper Foil of 8-12 μ m is collector; Be applied on the Copper Foil positive and negative uniformly creme and drying, roll, process cathode pole piece through roller press.Simultaneously, the single face surface density of positive plate coating is 120-180g/m
2, the single face surface density of negative plate coating is 50-90g/m
2
Subsequently, get up to constitute electric core, encase electric core and stick the termination adhesive tape with membrane layer according to the sequential cascade of membrane layer, cathode pole piece, membrane layer, anode pole piece.
At last, the lug of burn-oning with the encapsulation of aluminum plastic film battery case, is annotated electrolyte, seals.
Specifically, consider the unification of specification, anode pole piece and cathode pole piece design size on demand, section punching.Simultaneously, in order to improve the conductive effect of conductive agent, the conductive agent of employing is the mixture of conductive black or conductive black and electrically conductive graphite.And in order to promote cementation, binding agent is Kynoar or butadiene-styrene rubber.Same, in order to satisfy the instructions for use of solvent, solvent be N-methyl pyrrolidone or pure water.Moreover, consider to let the thickening of thickener appropriate that thickener is a sodium carboxymethylcellulose.
The result of use of the utility model is following: the discharge capacity of battery under the 1C discharge-rate can reach 10Ah.The specific energy of battery under the 0.2C discharge-rate reaches 132Wh/kg.Battery is after circulation under the 1C charge-discharge magnification 190 times, and its capability retention is up to 95.5%.
Can find out through above-mentioned character express; After adopting the utility model; The LiFePO4 of characteristics such as rely on Stability Analysis of Structures, environmental friendliness, fail safe is good, specific capacity is high, have extended cycle life is done positive electrode layer; Rely on the negative electrode layer that graphite linings constitutes; The aluminum plastic film battery case that has good flexibility through use is processed the flexible package ferric phosphate lithium cell, has reduced environmental pollution and has significantly reduced volume of battery and quality, thereby improved the specific energy of battery and performance that volumetric specific energy has been improved battery, reduced the battery cost.
Claims (3)
1. ferric phosphate lithium cell; Include battery case; It is characterized in that: be provided with anode pole piece and cathode pole piece in the described battery case, be provided with membrane layer between described anode pole piece and the cathode pole piece, be distributed with micropore on the described membrane layer; Be connected with positive pole ear on the described anode pole piece; Be connected with negative lug on the described cathode pole piece, the junction of described positive pole ear, negative lug and battery case is provided with independently dielectric film, is provided with electrolyte in the said battery case.
2. ferric phosphate lithium cell according to claim 1 is characterized in that: described membrane layer is the combined type membrane layer, includes main polypropylene layer, is distributed with polyethylene layer on the described main polypropylene layer, is distributed with secondary polypropylene layer on the described polyethylene layer.
3. ferric phosphate lithium cell according to claim 1 is characterized in that: described battery case is the aluminum plastic film cover layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200430735U CN202434646U (en) | 2012-02-10 | 2012-02-10 | Lithium iron phosphate battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200430735U CN202434646U (en) | 2012-02-10 | 2012-02-10 | Lithium iron phosphate battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202434646U true CN202434646U (en) | 2012-09-12 |
Family
ID=46784066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200430735U Expired - Fee Related CN202434646U (en) | 2012-02-10 | 2012-02-10 | Lithium iron phosphate battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202434646U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247818A (en) * | 2012-02-10 | 2013-08-14 | 苏州能斯特新能源有限公司 | Flexible-packaging laminated lithium iron phosphate cell with high specific energy and manufacturing method thereof |
| CN113471437A (en) * | 2021-06-18 | 2021-10-01 | 力博特电源科技（广州）有限公司 | Method for improving density of lithium iron phosphate battery |
-
2012
- 2012-02-10 CN CN2012200430735U patent/CN202434646U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247818A (en) * | 2012-02-10 | 2013-08-14 | 苏州能斯特新能源有限公司 | Flexible-packaging laminated lithium iron phosphate cell with high specific energy and manufacturing method thereof |
| CN113471437A (en) * | 2021-06-18 | 2021-10-01 | 力博特电源科技（广州）有限公司 | Method for improving density of lithium iron phosphate battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20140210 |