CN109585773A - A method of prevent inside lithium ion cell short-circuit - Google Patents
A method of prevent inside lithium ion cell short-circuit Download PDFInfo
- Publication number
- CN109585773A CN109585773A CN201710894053.6A CN201710894053A CN109585773A CN 109585773 A CN109585773 A CN 109585773A CN 201710894053 A CN201710894053 A CN 201710894053A CN 109585773 A CN109585773 A CN 109585773A
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- CN
- China
- Prior art keywords
- lithium ion
- battery
- circuit
- guide lug
- ion cell
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention relates to a kind of methods for preventing inside lithium ion cell short circuit, it is the pole piece using continuous coating active material, afflux guide lug is designed in the two sides of electrode, avoid guide lug penetrate through active material section, thus prevent lithium ion battery in charge and discharge process due to lithium metal guide lug blank space occur analysis lithium and deposition increase and puncturing diaphragm leads to internal short-circuit of battery.
Description
Technical field
The invention belongs to field of lithium ion battery, and in particular to a method of prevent inside lithium ion cell short-circuit.
Background technique
Inside lithium ion cell short circuit includes that positive and negative anodes are shorted and micro-short circuit completely；When inside battery positive and negative anodes are due to the external world
Factor (such as mechanical failure) and occur short circuit when, battery temperature will be caused to steeply rise, battery may be because thermal runaway and send out
The safety accidents such as raw on fire, explosion；It when micro-short circuit occurs for battery, then shows as self-discharge rate and significantly increases, electrical property declines drop
Rapidly, it is easy that overdischarge occurs because of undercharge, eventually leads to permanent short-circuit failure.
For battery in long-term charge and discharge process, the blank space between electrode active material element length is easy to produce lithium metal
Precipitation and deposition increase, it is possible to cause internal short-circuit of battery.
Cause the problem of short circuit for analysis lithium, the present invention provides a kind of methods for preventing internal short-circuit of battery, avoid
Internal short-circuit occurs for battery.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for preventing internal short-circuit of battery.
The technical scheme is that a kind of method for preventing internal short-circuit of battery, by taking measures interval electrode
Coating production method is changed to continuously coating.
According to the above method, afflux guide lug is designed in the two sides of electrode.
According to the above method, guide lug is avoided to penetrate through active material section.
The beneficial effects of the present invention are: method according to the invention it is possible to eliminating battery since lithium metal is in guide lug blank
Short-circuit hidden danger caused by the deposition at place.
Detailed description of the invention
It is attached that Fig. 1 shows 1 pole piece schematic diagrames of the embodiment of the present invention.
Attached drawing 2 indicates 2 pole piece schematic diagram of the embodiment of the present invention.
Label declaration:
01 embodiment, 1 active material coating zone
02 embodiment, 1 guide lug region
03 embodiment, 2 active material coating zone
04 embodiment, 2 guide lug region
Specific embodiment
Embodiment 1
A. positive plate makes
By positive electrode (LiCoO in proportion2: Super P:PVDF=91:6:3) mixing, with NMP (NMP: solid matter
Weight=810:1500) it is mixed, anode sizing agent viscosity is controlled in 6000cps.Anode sizing agent uniformly continuous is coated
In aluminium foil surface, aluminium foil is reserved guide lug position and is not coated by slurry (as shown in Fig. 1), drying, the work for rolling, being cropped to design
Skill parameter and be fabricated to positive plate.
B. negative electrode tab makes
Negative electrode material is mixed in proportion (C:Super P:SBR:CMC=94:1:3:2), with H2O(H2O: solid matter weight
Amount=1600:1420) it is mixed, negative electrode slurry viscosity is controlled in 5000~6000cps.By negative electrode slurry uniformly continuous
Ground is coated in copper foil surface, and copper foil is reserved guide lug position and is not coated by slurry (as shown in Fig. 1), and drying rolls, is cropped to and sets
The technological parameter of meter and be fabricated to negative electrode tab.
C. electrolyte configures
By LiPF6, EC (ethylene carbonate), EMC (methyl ethyl carbonate), EB (ethyl butyrate) and toluene mixing, be made
LiPF6Organic solution, when mixing, contain solute 1.0molLiPF according to every liter of electrolyte6；Solvent EC percent by volume 40%,
EMC percent by volume is 30%, EB percent by volume is 22%, volume of toluene percentage is 8%.
D. the assembling of lithium ion battery
By the positive plate, diaphragm, negative electrode tab of acquisition in such a way that diaphragm is between positive plate and negative electrode tab helical form
Ground winds poling group, and pole is assembled into 18650 type battery cases, configured electrolyte is then injected into battery case, so
18650 type battery cover boards and battery case are sealed afterwards, that is, complete the assembling of lithium ion battery.
E. the chemical conversion of battery and the test of 45 DEG C of high temperature cyclic performances
Fertilizer alleviant:
A) 0.2C electric current constant-current charge turns 4.2V constant-voltage charge to electric current 20mA to 4.2V
B) 30min is shelved
C) 0.5C constant-current discharge is to 2.75V
D) 0.2C electric current constant-current charge turns 4.2V constant-voltage charge to electric current 20mA to 4.2V
E) 30min is shelved
F) 1C constant-current discharge is to 2.75V
45 DEG C of high temperature circulation systems:
Charging: electric discharge state battery is turned into 4.2V constant-voltage charge extremely with 1C electric current constant-current charge to 4.2V under 45 temperature environments
Electric current 20mA.
Electric discharge: 2.75V is discharged to 1C under 45 DEG C of environment.
Embodiment 2
A. positive plate makes
By positive electrode (LiCoO in proportion2: Super P:PVDF=91:6:3) mixing, with NMP (NMP: solid matter
Weight=810:1500) it is mixed, anode sizing agent viscosity is controlled in 6000cps.Anode sizing agent uniformly continuous is coated
In aluminium foil surface, aluminium foil is reserved guide lug position and is not coated by slurry (as shown in Fig. 2), drying, the work for rolling, being cropped to design
Skill parameter and be fabricated to positive plate.
B. negative electrode tab makes
Negative electrode material is mixed in proportion (C:Super P:SBR:CMC=94:1:3:2), with H2O(H2O: solid matter weight
Amount=1600:1420) it is mixed, negative electrode slurry viscosity is controlled in 5000~6000cps.By negative electrode slurry uniformly continuous
Ground is coated in copper foil surface, and copper foil is reserved guide lug position and is not coated by slurry (as shown in Fig. 2), and drying rolls, is cropped to and sets
The technological parameter of meter and be fabricated to negative electrode tab.
C. electrolyte configures
By LiPF6, EC (ethylene carbonate), EMC (methyl ethyl carbonate), EB (ethyl butyrate) and toluene mixing, be made
LiPF6Organic solution, when mixing, contain solute 1.0molLiPF according to every liter of electrolyte6；Solvent EC percent by volume 40%,
EMC percent by volume is 30%, EB percent by volume is 22%, volume of toluene percentage is 8%.
D. the assembling of lithium ion battery
By the positive plate, diaphragm, negative electrode tab of acquisition in such a way that diaphragm is between positive plate and negative electrode tab helical form
Ground winds poling group, and pole is assembled into 18650 type battery cases, configured electrolyte is then injected into battery case, so
18650 type battery cover boards and battery case are sealed afterwards, that is, complete the assembling of lithium ion battery.
E. the chemical conversion of battery and the test of 45 DEG C of high temperature cyclic performances
Fertilizer alleviant:
A) 0.2C electric current constant-current charge turns 4.2V constant-voltage charge to electric current 20mA to 4.2V
B) 30min is shelved
C) 0.5C constant-current discharge is to 2.75V
D) 0.2C electric current constant-current charge turns 4.2V constant-voltage charge to electric current 20mA to 4.2V
E) 30min is shelved
F) 1C constant-current discharge is to 2.75V
45 DEG C of high temperature circulation systems:
Charging: electric discharge state battery is turned into 4.2V constant-voltage charge extremely with 1C electric current constant-current charge to 4.2V under 45 temperature environments
Electric current 20mA.
Electric discharge: 2.75V is discharged to 1C under 45 DEG C of environment.
45 DEG C of high temperature circulation test results:
The present invention is not limited to the embodiment of above-mentioned embodiment, this field inspiration according to the present invention is not departed from
The improvement and modification that scope of the invention is made all should be within the scope of the present invention.
Claims (2)
1. a kind of method for preventing inside lithium ion cell short circuit, which is characterized in that it is using continuous coating active material
The afflux guide lug of pole piece, the pole piece is designed in the two sides of electrode.
2. a kind of method for preventing inside lithium ion cell short circuit according to claim 1, which is characterized in that pole piece is led
Ear does not penetrate through active material section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710894053.6A CN109585773A (en) | 2017-09-28 | 2017-09-28 | A method of prevent inside lithium ion cell short-circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710894053.6A CN109585773A (en) | 2017-09-28 | 2017-09-28 | A method of prevent inside lithium ion cell short-circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109585773A true CN109585773A (en) | 2019-04-05 |
Family
ID=65912449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710894053.6A Withdrawn CN109585773A (en) | 2017-09-28 | 2017-09-28 | A method of prevent inside lithium ion cell short-circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109585773A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1635647A (en) * | 2003-12-29 | 2005-07-06 | 中国电子科技集团公司第十八研究所 | Method for preparing short circuit proof electrode |
| CN2789941Y (en) * | 2005-04-13 | 2006-06-21 | 深圳市比克电池有限公司 | Lithium ion battery pole piece and battery |
| CN103579684A (en) * | 2012-07-31 | 2014-02-12 | 华为技术有限公司 | Lithium ion battery and battery core thereof |
| CN205723770U (en) * | 2016-06-30 | 2016-11-23 | 横店集团东磁股份有限公司 | The electrode of a kind of battery and lithium ion battery |
-
2017
- 2017-09-28 CN CN201710894053.6A patent/CN109585773A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1635647A (en) * | 2003-12-29 | 2005-07-06 | 中国电子科技集团公司第十八研究所 | Method for preparing short circuit proof electrode |
| CN2789941Y (en) * | 2005-04-13 | 2006-06-21 | 深圳市比克电池有限公司 | Lithium ion battery pole piece and battery |
| CN103579684A (en) * | 2012-07-31 | 2014-02-12 | 华为技术有限公司 | Lithium ion battery and battery core thereof |
| CN205723770U (en) * | 2016-06-30 | 2016-11-23 | 横店集团东磁股份有限公司 | The electrode of a kind of battery and lithium ion battery |
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| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20190405 |