CN202871918U - Lithium ion battery with wide temperature zone - Google Patents
Lithium ion battery with wide temperature zone Download PDFInfo
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- CN202871918U CN202871918U CN2012203889112U CN201220388911U CN202871918U CN 202871918 U CN202871918 U CN 202871918U CN 2012203889112 U CN2012203889112 U CN 2012203889112U CN 201220388911 U CN201220388911 U CN 201220388911U CN 202871918 U CN202871918 U CN 202871918U
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- lithium ion
- ion battery
- top cover
- battery
- temperature
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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
Abstract
The utility model discloses a lithium ion battery with a wide temperature zone, and belongs to the field of chemical power supplies. The battery comprises a positive electrode plate, a negative electrode plate and a battery top cover, wherein the negative electrode plate is a copper plate; a negative electrode slurry layer is coated on the surface of the negative electrode plate; a positive temperature coefficient thermistor connected in series into an output circuit is arranged in the top cover; and an exhaustion valve is arranged in the top cover. The lithium ion battery is high in charging and discharging performance at low temperature, and has functions of pre-warning and protection at high temperature and a large working temperature zone.
Description
Technical field
The utility model discloses a kind of lithium ion battery, disclose especially a kind of wide warm area lithium ion battery, belong to field of chemical power source.
Background technology
The research of lithium ion battery starts from the oil crisis of 60～seventies of 20th century the earliest, mainly concentrates at that time the lithium secondary battery system take lithium metal and alloy thereof as negative pole.Although Exxon company do not realize in the commercial hope of 20 century 70 lithium ion batteries, the development of lithium ion battery has been played very large impetus.
From the TiS2 of 20 century 70 stratiforms first as the positive electrode of lithium ion battery, to the eighties in 20th century with the LiCoO2 of stratiform as positive electrode, so that the transition metal such as LiNO2 and LiMn2O4 oxide had all obtained widely research as positive electrode afterwards.Especially since olivine structural LiFePO4 in 1997 is in the news as lithium ion secondary battery anode material, a series of achievements in research have been obtained.Studies show that: LiFePO4 has the theoretical capacity of 170mAh/g, the voltage platform about 3.5V, the mass density of 3.64g/cm3.Li under low current density among the LiFePO4 almost can all embed/take off embedding, and the quantity of reversible embedding/take off embedding Li can increase along with the rising of working temperature, show good high-temperature stability and fail safe, LiFePO4 is environmentally friendly simultaneously, the raw material sources of its preparation are extensive, has potential low cost, simultaneously as long as suitable doping vario-property also can satisfy high-multiplying power discharge and namely satisfy electrokinetic cell to the requirement of positive electrode.Ferric phosphate lithium ion battery becomes present only power-type lithium ion battery because of the combination properties such as " discharge-rate, security performance, low price, environmental friendliness " of its brilliance.
But research is found simultaneously, the ferric phosphate lithium ion battery cryogenic property is relatively poor, and battery capacity reduces sharply with temperature and descends, and capacity only is approximately 60% under the normal temperature in the time of-20 ℃, be unfavorable for the performance performance under the lower temperature, limited the use of this type of lithium ion battery in cold district or cold season.
And during high temperature, battery also generates heat, internal resistance increases, use as electrokinetic cell, discharge-rate is higher, more can cause inside battery temperature rise aggravation, internal pressure is too high, the battery of traditional design not only without prior-warning device, but also gas is in time got rid of, have many potential safety hazards, be unfavorable for that battery uses under higher temperature.
Summary of the invention
The utility model is for providing a kind of wide warm area lithium-ion-power cell, and this battery has lower working temperature and than the fail safe under the elevated operating temperature.
A kind of wide warm area lithium-ion-power cell provided by the utility model, comprise positive plate, negative plate and battery cap, the negative plate collector is copper sheet, be coated with the cathode size layer on its surface, in top cover, be provided with the semistor that is connected in the output circuit, in top cover, be provided with vent valve, in top cover, be provided with and the joining failure of current device of vent valve, described cathode size layer is comprised of disperse phase graphite composite material and disperse means
The utility model negative plate is comprised of copper sheet and pulp layer; pulp layer is by the disperse phase graphite composite material; disperse means form; disperse means comprise conductive additive and adhesive; particularly; the use of disperse phase graphite composite material; specific area and the passage of material with carbon element have been improved; improved the diffusion coefficient of Li+; capacity still can reach approximately 63% under the normal temperature in the time of-30 ℃; in the time of-20 ℃ capacity can reach under the normal temperature more than 70%; so that lithium ion battery described in the utility model has-30 ℃～60 ℃ very wide operation temperature area; battery cap has increased the prior-warning device of semistor; increased the explosion-protection equipment of vent valve; capping structure perfect; early warning and gas when being beneficial to high temperature are in time discharged; press too high phenomenon in battery occurs in the time of can avoiding applied at elevated temperature; strengthened the fail safe of battery under the high temperature; under normal circumstances; semistor is low resistive state; the normal operation of assurance circuit; when circuit was short-circuited or scurries into unusual large electric current, its temperature rose rapidly, caused that impedance increases severely; the electric current that passes through diminishes; circuit reaches early warning protection purpose, after unusual disappearance as disconnection; self-heating is not enough to keep its high-impedance state; its impedance returns to again low resistive state, and the circuit early warning is removed, and recovers normal.Under the high temperature, it is large that the inside battery atmospheric pressure becomes, after reaching certain value, the vent valve both sides can be by jack-up, and gases at high pressure can be discharged from the vent valve slit, and air pressure is reduced to when the same with the external world, the exhaust valve plate shape returns to normal, and has increased the fail safe that battery high-temperature uses.
Description of drawings
Accompanying drawing 1 is the schematic diagram of the utility model top cover.
Accompanying drawing 2 is schematic diagrames of the utility model negative plate.
Embodiment
In order to explain more fully enforcement of the present utility model, provide embodiment of the present utility model.These embodiments only are the elaborations to this utility model, do not limit scope of the present utility model.
As shown in Figure 2, the negative plate collector adopts copper sheet 5, be coated with cathode size layer 6 at copper sheet 5, the cathode size layer is by the disperse phase graphite composite material, corresponding conductive agent, binding agent is mixed, its quality proportioning is: 92% disperse phase graphite composite material (being nano-graphite and conductive carbon black), 2% conductive additive (can adopt the Al powder), 6% adhesive (can adopt CMC: CMC and SBR: butadiene-styrene rubber)), it is coated in copper sheet 5 surfaces and the copper sheet 5 common negative plates that form, as shown in Figure 1, the semistor 2 that is connected in the output circuit is set in top cover 1, in top cover 1, be provided with vent valve 3, in top cover, be provided with and the joining failure of current device 4 of vent valve, with LiFePO4 as anode material for lithium-ion batteries, anodal by composite ferric lithium phosphate material, corresponding conductive agent, binding agent and aluminium foil form, with the disperse phase graphite composite material as lithium ion battery negative material, negative plate is by the disperse phase graphite composite material, corresponding conductive agent, binding agent and Copper Foil form, wherein, the quality proportioning of negative pole coating sizing-agent is: 92% disperse phase graphite composite material (nano-graphite and conductive carbon black), 2% conductive additive (Al powder), 6% adhesive (CMC and SBR), through stirring, coating, roll-in, film-making, reel, enter shell, the weldering end, slot rolling, fluid injection, the welding cap cap, the operations such as sealing make wide warm area power lithium-ion battery.
The purpose of this utility model implementation procedure is: the use of disperse phase graphite composite material; specific area and the passage of material with carbon element have been improved; improved the diffusion coefficient of Li+; capacity still can reach approximately 63% under the normal temperature in the time of-30 ℃; in the time of-20 ℃ capacity can reach under the normal temperature more than 70%; so that lithium ion battery described in the utility model has-30 ℃～60 ℃ very wide operation temperature area; battery cap 1 has increased the prior-warning device of semistor; increased the explosion-protection equipment of vent valve 3; top cover 1 structure perfect; early warning and gas when being beneficial to high temperature are in time discharged; press too high phenomenon in battery occurs in the time of can avoiding applied at elevated temperature; strengthened the fail safe of battery under the high temperature; under normal circumstances; semistor 2 is low resistive state; the normal operation of assurance circuit; when circuit was short-circuited or scurries into unusual large electric current, its temperature rose rapidly, caused that impedance increases severely; the electric current that passes through diminishes; circuit is approximate to be disconnected, and reaches early warning protection purpose, after unusual disappearance; self-heating is not enough to keep its high-impedance state; its impedance returns to again low resistive state, and the circuit early warning is removed, and recovers normal.Under the high temperature, it is large that the inside battery atmospheric pressure becomes, and after reaching certain value, vent valve 3 both sides can be by jack-up, and gases at high pressure can be discharged from the vent valve slit, and air pressure is reduced to when the same with the external world, and the exhaust valve plate shape returns to normal.
After describing execution mode of the present utility model in detail, the personage who is familiar with this technology can be well understood to, can carry out various variations and modification not breaking away under above-mentioned claim and the spirit, any simple modification, equivalent variations and modification that all foundations technical spirit of the present utility model is done above embodiment, the scope that all belongs to technical solutions of the utility model, and utility model of the present invention also is not subject to the execution mode that gives an actual example in the specification.
Claims (4)
1. one kind wide warm area lithium ion battery comprises positive plate, negative plate and battery cap (1), it is characterized in that: negative plate comprises collector copper sheet (5), and being coated with cathode size layer (6) making on its surface becomes negative plate.
2. a kind of wide warm area lithium ion battery according to claim 1 is characterized in that: be provided with the semistor (2) that is connected in the output circuit in top cover (1).
3. a kind of wide warm area lithium ion battery according to claim 1 is characterized in that: be provided with vent valve (3) in top cover (1).
4. a kind of wide warm area lithium ion battery according to claim 2 is characterized in that: be provided with in top cover (1) and the joining failure of current device of vent valve (3) (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203889112U CN202871918U (en) | 2012-08-08 | 2012-08-08 | Lithium ion battery with wide temperature zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203889112U CN202871918U (en) | 2012-08-08 | 2012-08-08 | Lithium ion battery with wide temperature zone |
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| Publication Number | Publication Date |
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| CN202871918U true CN202871918U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012203889112U Expired - Fee Related CN202871918U (en) | 2012-08-08 | 2012-08-08 | Lithium ion battery with wide temperature zone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186262A (en) * | 2020-10-09 | 2021-01-05 | 西安交通大学 | MLCC structure-based all-solid-state lithium ion battery and preparation method thereof |
-
2012
- 2012-08-08 CN CN2012203889112U patent/CN202871918U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186262A (en) * | 2020-10-09 | 2021-01-05 | 西安交通大学 | MLCC structure-based all-solid-state lithium ion battery and preparation method thereof |
| CN112186262B (en) * | 2020-10-09 | 2022-12-09 | 西安交通大学 | MLCC structure-based all-solid-state lithium ion battery and preparation method thereof |
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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 |
Granted publication date: 20130410 Termination date: 20160808 |
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| CF01 | Termination of patent right due to non-payment of annual fee |