CN105552252A - Long-storage lifetime lithium-ion battery and treatment method therefor - Google Patents
Long-storage lifetime lithium-ion battery and treatment method therefor Download PDFInfo
- Publication number
- CN105552252A CN105552252A CN201510923562.8A CN201510923562A CN105552252A CN 105552252 A CN105552252 A CN 105552252A CN 201510923562 A CN201510923562 A CN 201510923562A CN 105552252 A CN105552252 A CN 105552252A
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- China
- Prior art keywords
- ion battery
- lithium ion
- battery
- long
- storage life
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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 invention relates to a long-storage lifetime lithium-ion battery and a treatment method therefor, and belongs to the technical field of lithium-ion batteries. The long-storage lifetime lithium-ion battery is characterized in that the inner wall of a steel shell for the long-storage lifetime lithium-ion battery is coated with an insulating coating. The treatment method for the long-storage lifetime lithium-ion battery is characterized by comprising the following treatment processes: coating the inner wall of the steel shell for the lithium-ion battery with the insulating coating; drying the insulating coating and finishing insulating treatment of the shell; and assembling the shell and a battery core. By a coating technology, the stability of the steel shell for the lithium-ion battery during storage and long-term cycle can be ensured; the lifetime characteristics of the battery are greatly improved; meanwhile, the safety performance of the battery is improved; and the long-storage lifetime lithium-ion battery has the advantages of being simple in structure, convenient to operate and the like.
Description
Technical field
The invention belongs to technical field of lithium ion, particularly relate to lithium ion battery and the processing method thereof of a kind of long storage life.
Background technology
At present, the advanced battery that lithium-ions battery grew up as a kind of phase early 1990s, there is the series of advantages such as high-energy-density, high voltage, wide operating temperature range, low self-discharge rate and memory-less effect, in recent years in Aero-Space, space power system field, especially civilian goods electric automobiles has had and has applied widely.Along with the continuous expansion of application is with deep, also more and more higher to the requirement of lithium ion battery.
Simultaneously just there is not related request to the specific energy of lithium ion battery and specific power, have very high requirement too to the performance of lithium ion battery in storage process.Lithium ion battery, in storage process, can make due to self discharge battery performance have part to decline and fall.Especially box hat battery, causes due to the precipitation of metal impurities in box hat forming metallic dendrite in negative terminal surface, and then pierces through barrier film, cause the micro-short circuit between battery plus-negative plate, is to cause battery to occur one of degradation very major reason.
Summary of the invention
The present invention provides lithium ion battery and the processing method thereof of a kind of long storage life for solving in known technology the technical problem that exists.
The present invention is by applying insulating coating at lithium ion battery box hat inwall; inner walls can well protect by this coating; reduce the response area of housing (especially box hat) and electrolyte; play barrier action; the precipitation of effective suppression box hat inwall metallic element, reduces the self-discharge rate of lithium ion battery.The method effectively can improve the storage life of battery, reduces potential safety hazard simultaneously.
An object of the present invention is to provide one, and to have structure simple, can ensure that lithium ion battery box hat is storing and the stability of long-term circulation time, can improve the life-span of battery, can improve the lithium ion battery of the long storage life of the features such as the fail safe of battery.
The technical scheme that the lithium ion battery of the present invention long storage life is taked is:
The lithium ion battery of long storage life, is characterized in: the box hat inwall of the lithium ion battery of long storage life has coating insulating coating.
The lithium ion battery of the present invention long storage life can adopt following technical scheme:
The lithium ion battery of described long storage life, is characterized in: the insulating material of insulating coating is Kynoar, polytetrafluoroethylene or carboxymethyl cellulose organic system binding agent.
The lithium ion battery of described long storage life, is characterized in: the thickness of insulating coating is 2 ~ 10 μm.
Two of object of the present invention is to provide one, and to have technique simple, easy to process, can ensure that lithium ion battery box hat is storing and the stability of long-term circulation time, can improve the life-span of battery, can improve the processing method of the lithium ion battery of the long storage life of the features such as the fail safe of battery.
The technical scheme that the processing method of the lithium ion battery of the present invention long storage life is taked is:
The processing method of the lithium ion battery of long storage life, it is characterized in that: the processing procedure of the lithium ion battery of long storage life is at lithium ion battery box hat inwall coating insulating coating, then dry, complete the insulation processing to housing, then assemble with battery core.
The processing method of the lithium ion battery of the present invention long storage life can also adopt following technical scheme:
The processing method of the lithium ion battery of described long storage life, be characterized in: the insulation paste of insulating coating is by Kynoar, polytetrafluoroethylene or carboxymethyl cellulose organic system binding agent and solvent composition, and the solid content mass percent of insulation paste is 1%-20%.
The processing method of the lithium ion battery of described long storage life, is characterized in: solvent is water or N methyl pyrrolidone, acetone.
The advantage that the present invention has and good effect are:
The lithium ion battery of long storage life and processing method thereof are owing to have employed the brand-new technical scheme of the present invention, compared with prior art, the present invention is by adopting this coating technology, can ensure that lithium ion battery box hat is storing and the stability of long-term circulation time, the life characteristic of great raising battery, improves the security performance of battery simultaneously.
Accompanying drawing explanation
Fig. 1 is the lithium-ion battery shell inner wall surface coating schematic diagram of the present invention's long storage life;
Fig. 2 is 20 DEG C and stores self-discharge of battery test half a year 18650;
Fig. 3 is 18650 battery cycle life test curves.
In figure, 1-battery, 2-coating, 3-box hat.
Embodiment
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Accompanying drawings 1, Fig. 2 and Fig. 3.
In the present embodiment and comparative example, negative pole and the electrolyte of employing are same, and adopt 18650 size battery to carry out Performance Evaluation.
Embodiment 1
The lithium ion battery of long storage life, processing procedure:
Kynoar (PVDF) is adopted to be binding agent, nitrogen methyl pyrrolidone (NMP) is solvent, adopt mixer that above-mentioned material is mixed with glue, wherein each material mass proportioning is as follows: binding agent: solvent=6:94, and this glue solid content is 6%.
Above-mentioned glue is coated in 18650 battery box hat inwalls, uniform application is also dried.Coating layer thickness≤5 μm, complete the insulation processing to housing thus.
Embodiment 2
The lithium ion battery of long storage life, processing procedure:
Employing Kynoar is binding agent, and nitrogen methyl pyrrolidone (NMP) is solvent, and adopt mixer that above-mentioned material is mixed with glue, wherein each material mass proportioning is as follows: binding agent: solvent=6:94, and this glue solid content is 6%.
Above-mentioned glue is coated in 18650 battery box hat inwalls, uniform application is also dried.Coating layer thickness 10 μm, completes the insulation processing to housing thus.
Embodiment 3
The lithium ion battery of long storage life, processing procedure:
Carboxymethyl cellulose class (CMC) is adopted to be binding agent, nitrogen methyl pyrrolidone (NMP) is solvent, adopt mixer that above-mentioned material is mixed with glue, wherein each material mass proportioning is as follows: binding agent: solvent=2:98, and this glue solid content is 2%.
Above-mentioned glue is coated in 18650 battery box hat inwalls, uniform application is also dried.Coating layer thickness 10 μm, completes the insulation processing to housing thus.
Comparative example 1
18650 box hat battery inwalls are left intact.
Itself and battery core are assembled according to lithium ion battery preparation technology general in industry by the housing in above-described embodiment and comparative example, and is assembled into 18650 batteries.
Battery testing method:
1, test storage life
Battery is with 0.5C (1.1A) constant-current constant-voltage charging to 80%SOC, and namely charge 96min, 0.5A end; This full electric state battery is carried out 20 DEG C ± 3 DEG C and stores half a year, test battery open circuit voltage.
2, loop test
Battery with 0.5C (1.1A) constant-current constant-voltage charging to 4.2V; Shelve 10min; 2.75V is discharged to 0.5C (1.1A); Shelve 10min.So carry out charge and discharge cycles.
The present embodiment has coating insulating coating technology by adopting box hat inwall, can ensure that lithium ion battery box hat is storing and the stability of long-term circulation time, greatly improves the life characteristic of battery, improves the security performance etc. of battery simultaneously.
Claims (6)
1. the lithium ion battery of long storage life, is characterized in that: the box hat inwall of the lithium ion battery of long storage life has coating insulating coating.
2. the lithium ion battery of long storage life according to claim 1, is characterized in that: the insulating material of insulating coating is Kynoar, polytetrafluoroethylene or carboxymethyl cellulose organic system binding agent.
3. the lithium ion battery of long storage life according to claim 1, is characterized in that: the thickness of insulating coating is 2 ~ 10 μm.
4. the processing method of the lithium ion battery of long storage life according to claim 1, it is characterized in that: the processing procedure of the lithium ion battery of long storage life is at lithium ion battery box hat inwall coating insulating coating, then dry, complete the insulation processing to housing, then assemble with battery core.
5. the processing method of the lithium ion battery of long storage life according to claim 4, it is characterized in that: the insulation paste of insulating coating is by Kynoar, polytetrafluoroethylene or carboxymethyl cellulose organic system binding agent and solvent composition, and the solid content mass percent of insulation paste is 1%-20%.
6. the lithium ion battery of long storage life according to claim 5, is characterized in that: solvent is water or N methyl pyrrolidone, acetone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510923562.8A CN105552252A (en) | 2015-12-11 | 2015-12-11 | Long-storage lifetime lithium-ion battery and treatment method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510923562.8A CN105552252A (en) | 2015-12-11 | 2015-12-11 | Long-storage lifetime lithium-ion battery and treatment method therefor |
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| Publication Number | Publication Date |
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| CN105552252A true CN105552252A (en) | 2016-05-04 |
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| CN201510923562.8A Pending CN105552252A (en) | 2015-12-11 | 2015-12-11 | Long-storage lifetime lithium-ion battery and treatment method therefor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352810A (en) * | 2000-04-04 | 2002-06-05 | 松下电器产业株式会社 | Lithium accumulator and its producing method |
| CN1901248A (en) * | 2006-07-11 | 2007-01-24 | 任晓平 | Plastic case lid with plated layer or coating and battary or battary group including said case lid |
| CN101853926A (en) * | 2010-06-22 | 2010-10-06 | 深圳市豪鹏科技有限公司 | Battery steel shell and insulating method and battery thereof |
| US20100310925A1 (en) * | 2009-06-08 | 2010-12-09 | Samsung Sdi Co., Ltd. | Cylindrical lithium ion secondary battery |
| CN203288661U (en) * | 2013-05-21 | 2013-11-13 | 宁德新能源科技有限公司 | Cylindrical steel shell lithium ion battery |
-
2015
- 2015-12-11 CN CN201510923562.8A patent/CN105552252A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352810A (en) * | 2000-04-04 | 2002-06-05 | 松下电器产业株式会社 | Lithium accumulator and its producing method |
| CN1901248A (en) * | 2006-07-11 | 2007-01-24 | 任晓平 | Plastic case lid with plated layer or coating and battary or battary group including said case lid |
| US20100310925A1 (en) * | 2009-06-08 | 2010-12-09 | Samsung Sdi Co., Ltd. | Cylindrical lithium ion secondary battery |
| CN101853926A (en) * | 2010-06-22 | 2010-10-06 | 深圳市豪鹏科技有限公司 | Battery steel shell and insulating method and battery thereof |
| CN203288661U (en) * | 2013-05-21 | 2013-11-13 | 宁德新能源科技有限公司 | Cylindrical steel shell lithium ion battery |
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Application publication date: 20160504 |