CN2877049Y - Micro polymer lithium ion cell - Google Patents
Micro polymer lithium ion cell Download PDFInfo
- Publication number
- CN2877049Y CN2877049Y CNU2006200402138U CN200620040213U CN2877049Y CN 2877049 Y CN2877049 Y CN 2877049Y CN U2006200402138 U CNU2006200402138 U CN U2006200402138U CN 200620040213 U CN200620040213 U CN 200620040213U CN 2877049 Y CN2877049 Y CN 2877049Y
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- Prior art keywords
- film
- ion battery
- polymer
- negative electrode
- electrolyte
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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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- Battery Electrode And Active Subsutance (AREA)
Abstract
A mini-type polymer Li-ion battery comprises a positive film, a negative film, a membrane and electrolyte, wherein the negative film is a dual-function electrode film formed by applying, on front and back surfaces of a negative film substrate, an adhesive electrolyte coating. The polymer Li-ion battery is formed by winding process and has a thickness of 0.5mm; compared with the polymer Li-ion battery (soft package and the same size) in the prior art, the capacity and specific energy are respectively improved by 6% and 10%; the cyclicity is better (the capcity attenuating about 15% for 500 cycles); the safety performance has improved a lot (no leakage, short cuicuit and few micros short) and its production cost is reduced by 20% (calculated as per the production capacity of 10,000 batteries/day) with the improved production efficiency.
Description
One, technical field:
The utility model relates to polymer Li-ion battery, particularly discloses a kind of microminiature polymer Li-ion battery.
Two, background technology:
It is that positive and negative electrode film about 150 μ m and the barrier film about 20 μ m are assembled that prior art polymers (flexible package) lithium ion battery extensively adopts thickness, adds liquid electrolyte then.The battery that this package assembly is made, it is little to have an energy density height, output voltage height, self discharge, and characteristics such as cycle performance is superior, can satisfy the needs of existing market substantially.Novel electron product (technology)---Bluetooth technology but (Blue Tooth) arises at the historic moment, appearance as MP3 (pocket walkman) and bluetooth intercommunication earphone, polymer Li-ion battery has been proposed particularly the security performance of polymer Li-ion battery also to be had higher requirement to " light, thin, the little " requirement that direction develops.
Existing polymer (flexible package) the electrode film package assembly that lithium ion battery adopted as shown in Figure 1.In this package assembly,, cause following influence easily because cathode film 1, barrier film 2 and negative electrode film 3 can relatively move:
1, cathode film 1, barrier film 2 and negative electrode film 3 threes only depend on mechanical pressure tightly to assemble, and for the material (granule) that falls on the negative electrode film 3 provides the space, more easily bring out battery micro-short circuit or short circuit easily, cause potential safety hazard.
Although 2 domestic most of enterprises are when product design, barrier film 2 width than cathode film 1, negative electrode film 3 wide 2mm about, but still meeting automated job degree is not enough, do not note just causing easily cathode film 1, barrier film 2, negative electrode film 3 not contrapositions in artificial the coiling slightly, thereby cause cathode film 1, negative electrode film 3 directly to contact, cause unnecessary potential safety hazard.
3, because barrier film 2 width are wideer than cathode film 1, negative electrode film 3, and barrier film 2 is soft, and when making polymer Li-ion battery, battery thickness end to end is thinner than other position slightly.Also have influence on the space utilization of battery in addition, limited the raising of battery capacity.
Polymer Li-ion battery becomes one of emphasis of research with the making and the packaging technology of electrode film for this reason.
Three, summary of the invention:
The utility model discloses a kind of microminiature polymer Li-ion battery, to overcome the drawback that prior art electrode film structure is brought, when realizing the Bao Xiaohua of polymer Li-ion battery, improves the security performance of polymer Li-ion battery.
The utility model is achieved in that a kind of microminiature polymer Li-ion battery, comprise cathode film, negative electrode film, barrier film and electrolyte, it is characterized in that: described negative electrode film is that bifunctional electrodes film, described bifunctional electrodes film scribble the electrolyte viscosity slurry coating that existing barrier film effect has the electrolyte effect again on the positive and negative two sides of negative electrode film base material.Described electrolyte viscosity slurry coating thickness is at 13～17 microns.Described cathode film, negative electrode film thickness are at 65～75 microns.
The beneficial effects of the utility model are: the polymer Li-ion battery that uses the bifunctional electrodes film and make by winding process, and it is thick that its thickness can be fabricated into 0.5mm; The relative prior art polymer with specific energy of capacity (flexible package) lithium ion battery improves 6% and 10% (for the battery of same size) respectively; Cycle performance more superior (circulated for 500 weeks, capacity attenuation is about 15%); Security performance also improves (few as the no phenomenon of leakage, short circuit or micro-short circuit phenomenon) greatly, and production efficiency improves greatly simultaneously, and nearly 20% (calculating with 10,000/day production capacities) can reduce production costs.
Four, description of drawings:
Fig. 1 is prior art lithium ion battery coiling pre-structure figure;
Fig. 2 is the utility model lithium ion battery coiling pre-structure figure;
Fig. 3 is the A enlarged diagram of Fig. 2;
Among the figure: 1, cathode film; 2, barrier film; 3, negative electrode film; 4, bifunctional electrodes film; 5, electrolyte viscosity slurry coating.
Five, embodiment:
With reference to the accompanying drawings 2,3:
1, the utility model carries out the viscosity slurry of polymer dielectric and makes on the basis of colloidal state polymer electrolyte research and development achievement.This viscosity slurry mainly is by ethylene carbonate or propene carbonate, forms with copolymerization such as lithium hexafluoro phosphate and acrylonitrile-vinyl acetate copolymers.This viscosity slurry and prior art electrolyte are similar.Performance requirement is good with the both positive and negative polarity compatibility, electrolyte maintenance dose height, and conductivity can reach 10
-3The mS/cm order of magnitude.
2, the filming of carrying out the positive and negative electrode film is made.The thickness of positive electrode current film 1, negative electrode film 3 is all about 70 microns.
3, adopt the method that applies that the viscosity slurry of polymer dielectric is applied to the positive and negative two sides of filming negative electrode film, thereby obtain bifunctional electrodes film 4, form electrolyte viscosity slurry coating 5.
The utility model main feature:
A, positive and negative coating thickness are about 15 microns, and promptly the gross thickness of bifunctional electrodes film is about 100 microns.Such thickness helps the ion migration between bifunctional electrodes film and the filming cathode film, thereby has improved electrochemical reaction of Li-ion battery speed.
B, the electrolytical viscosity slurry coating of use, coating layer can hinder electron transfer again by the migration of lithium ion.Therefore this bifunctional electrodes film not only can participate in electrode reaction, and has played the effect of electrolyte and barrier film.
4, utilize coated bifunctional electrodes film and filming cathode film, carry out the battery assembling by winding process.
Such bifunctional electrodes membrane structure and assembling thereof not only can be simplified production process, enhance productivity, and also help the close fit between the bifunctional electrodes film simultaneously, reduce the internal resistance of battery, to improve the electrical property of battery.Overcome in the described structure of prior art the harmful effect that relatively moves and cause simultaneously owing to cathode film 1, barrier film 2, negative electrode film 3, the particularly coating of polymer dielectric viscosity slurry utilization, the powder of having reinforced the filming negative electrode film is bonding, greatly reduce battery owing to the short circuit or the micro-short circuit that fall to expect to cause, thus the fail safe that has improved battery.
Claims (3)
1, a kind of microminiature polymer Li-ion battery, comprise cathode film, negative electrode film, barrier film and electrolyte, it is characterized in that: described negative electrode film is that bifunctional electrodes film, described bifunctional electrodes film scribble the electrolyte viscosity slurry coating that existing barrier film effect has the electrolyte effect again on the positive and negative two sides of negative electrode film base material.
2, microminiature polymer Li-ion battery according to claim 1 is characterized in that: described electrolyte viscosity slurry coating thickness is at 13～17 microns.
3, microminiature polymer Li-ion battery according to claim 1 and 2 is characterized in that: described cathode film, negative electrode film thickness are at 65～75 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200402138U CN2877049Y (en) | 2006-03-15 | 2006-03-15 | Micro polymer lithium ion cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200402138U CN2877049Y (en) | 2006-03-15 | 2006-03-15 | Micro polymer lithium ion cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2877049Y true CN2877049Y (en) | 2007-03-07 |
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ID=37820285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200402138U Expired - Lifetime CN2877049Y (en) | 2006-03-15 | 2006-03-15 | Micro polymer lithium ion cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2877049Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459810A (en) * | 2019-08-15 | 2019-11-15 | 萨姆蒂萨（天津）数据信息技术有限公司 | A kind of preparation method of lithium battery |
-
2006
- 2006-03-15 CN CNU2006200402138U patent/CN2877049Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459810A (en) * | 2019-08-15 | 2019-11-15 | 萨姆蒂萨（天津）数据信息技术有限公司 | A kind of preparation method of lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090313 Address after: No. 459, Wensanlu Road, Hangzhou, Zhejiang Province, zip code: 310013 Co-patentee after: Zhejiang Nandu Battery Co., Ltd. Patentee after: Power power Limited by Share Ltd of Nandu, Zhejiang Address before: 1510 Jinqiao Road, Jinqiao Export Processing Zone, Shanghai, Pudong New Area: 201206 Patentee before: Narada Licom Power Technology (Shanghai) Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG PROV NANDOU POWER MOTOR CO., LTD. Free format text: FORMER OWNER: SHANGHAI NANDU ENERGY SCIENCE CO., LTD. Effective date: 20090313 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Patentee Correct: Zhejiang Nandu power source Limited by Share Ltd Hangzhou Nandu Battery Co., Ltd. False: Zhejiang Nandu power source Limited by Share Ltd Zhejiang Nandu Battery Co., Ltd. Number: 15 Page: 873 Volume: 25 |
|
| ERR | Gazette correction |
Free format text: CORRECT: PATENTEE; FROM: ZHEJIANG PROV NANDOU POWER MOTOR CO., LTD. ZHEJIANG PROV NANDOU BATTERY CO., LTD. TO: ZHEJIANG PROV NANDOU POWER MOTOR CO., LTD. HANGZHOU NANDOU BATTERY CO., LTD. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070307 |
|
| EXPY | Termination of patent right or utility model |