CN108832192A - A method of improving lithium battery security performance - Google Patents
A method of improving lithium battery security performance Download PDFInfo
- Publication number
- CN108832192A CN108832192A CN201810645096.5A CN201810645096A CN108832192A CN 108832192 A CN108832192 A CN 108832192A CN 201810645096 A CN201810645096 A CN 201810645096A CN 108832192 A CN108832192 A CN 108832192A
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- China
- Prior art keywords
- lithium battery
- security performance
- isolation film
- battery core
- improving lithium
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- 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.)
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- 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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of methods for improving lithium battery security performance, including step：Cathode sheet, anode pole piece and isolation film are assembled in the way of winding or lamination, obtain naked battery core by step 1；Step 2 drips upper glue between the head of naked battery core and the adjacent two layers isolation film of tail portion, forms micelle after glue curing, multiple micelles are bonding by multi-layer isolation films；Step 3 implements encapsulation, perfusion electrolyte, infiltration, chemical synthesis technology process to naked battery core, obtains finished product lithium battery.Through lithium battery made from the above method, under the action of glue, multiple isolation films can be adhesively secured together, be heat-shrinked to avoid isolation film under hot environment, and then improve the safety coefficient under lithium battery high temperature.Therefore, the method proposed by the present invention for improving lithium battery security performance, can be avoided the contraction of isolation film under hot environment, improves the safety coefficient of lithium battery, solve the problems, such as the field at this stage.
Description
Technical field
The present invention relates to field of lithium, more specifically to a kind of method for improving lithium battery security performance.
Background technique
With the fast development of current science and technology, electronic product is in people's daily life in occupation of more and more important position
It sets.Lithium ion battery becomes indispensable electrochmical power source because of advantages such as energy density is high, have extended cycle life, operating voltage height.
But in actual use, electronic product may meet with high temperature abuse, and high temperature can cause lithium battery to be isolated
The contraction of film leads to anode and cathode contact short circuit, increases internal temperature of lithium ion battery sharply, or even fire and explosion etc. occurs
Adverse consequences, to weaken consumer to the reliability of product.
For the prior art, manufacturer is improved usually in the following way under lithium battery hot environment at this stage
Safety coefficient：One is isolation film is increased at a distance from anode, to reduce the risk of anode and cathode short circuit；Another kind is in naked battery core
Head-tail stick on around glue, to prevent isolation film from shrinking.But the energy of battery can be reduced at a distance from anode by increasing isolation film
Density；And it is wide will affect electrolyte around glue and enter inside battery core, and not can effectively prevent the contraction of isolation film.
Therefore, the contraction for how avoiding isolation film under hot environment improves the safety coefficient of lithium battery, is the neck at this stage
Domain problem urgently to be resolved.
Summary of the invention
In view of this, this method can the purpose of the present invention is to provide a kind of method for improving lithium battery security performance
The contraction for avoiding isolation film under hot environment improves the safety coefficient of lithium battery, solves the problems, such as the field at this stage.
A method of improving lithium battery security performance, including step：
Cathode sheet, anode pole piece and isolation film are assembled in the way of winding or lamination, obtain naked electricity by step 1
Core；
Step 2, drips upper glue between the naked battery core head and the adjacent two layers isolation film of tail portion, and the glue is solid
Micelle is formed after change, multiple micelles are bonding by isolation film described in multilayer；
Step 3 implements encapsulation, perfusion electrolyte, infiltration, chemical synthesis technology process to the naked battery core, obtains finished product lithium electricity
Pond.
Preferably, the position of the method for the raising lithium battery security performance, the micelle distribution is dispensing region, institute
The area for stating dispensing region is less than the cross-sectional area of the naked battery core.
Preferably, the method for the raising lithium battery security performance, the area in the dispensing region and the naked battery core
The ratio between cross-sectional area be 5%-50%.
Preferably, the method for the raising lithium battery security performance, four angles of the naked battery core, which are dripped, the glue
Water.
Preferably, the method for the described raising lithium battery security performance, using automatic dispensing machine described in the adjacent two layers every
From the upper glue of drop between film.
Preferably, the method for the raising lithium battery security performance, the time of the glue curing are less than 1s.
Preferably, the method for the raising lithium battery security performance, road of multiple micelles on the isolation film
Diameter is in undaform or broken line type or bias type.
Preferably, the method for the raising lithium battery security performance, the single micelle is elongated, described in strip
The length of micelle is less than 2mm, and width is less than 1.5mm.
Preferably, the method for the raising lithium battery security performance, the single micelle are oval.
Preferably, the method for the raising lithium battery security performance, the height of the single micelle are less than 0.15mm.
The method proposed by the present invention for improving lithium battery security performance, including step：Step 1, by cathode sheet, anode
Pole piece and isolation film assemble in the way of winding or lamination, obtain naked battery core；Step 2, on the head and tail portion of naked battery core
Upper glue is dripped between adjacent two layers isolation film, forms micelle after glue curing, multiple micelles are bonding by multi-layer isolation films；Step
Three, encapsulation, perfusion electrolyte, infiltration, chemical synthesis technology process are implemented to naked battery core, obtain finished product lithium battery.Through above method system
Multiple isolation films can be adhesively secured under the action of glue together, to avoid being isolated under hot environment by the lithium battery obtained
Film is heat-shrinked, and then improves the safety coefficient under lithium battery high temperature.Therefore, raising lithium battery safety proposed by the present invention
The method of performance can be avoided the contraction of isolation film under hot environment, improve the safety coefficient of lithium battery, at this stage should solve
The problem in field.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram in the specific embodiment of the invention after the head dispensing of naked battery core；
Fig. 2 is the schematic diagram in the specific embodiment of the invention after the tail portion dispensing of naked battery core；
Fig. 3 is the schematic diagram in the specific embodiment of the invention after the head dispensing of naked battery core；
Fig. 4 is the schematic diagram in the specific embodiment of the invention after the tail portion dispensing of naked battery core.
In Fig. 1-Fig. 4：
Tab -1, micelle -2, isolation film -3.
Specific embodiment
The core of present embodiment is to provide a kind of method for improving lithium battery security performance, and this method can be kept away
Exempt from the contraction of isolation film under hot environment, improves the safety coefficient of lithium battery high temperature abuse, solve the difficulty in the field at this stage
Topic.
Hereinafter, being illustrated referring to attached drawing to embodiment.In addition, embodiments illustrated below is not to recorded in claim
Summary of the invention rise any restriction effect.In addition, the full content of composition represented by following example is not limited to as right
Necessary to the solution invented documented by it is required that.
The method proposed by the present invention for improving lithium battery security performance, referring to Figure 1-Fig. 4；Including step：Step 1, will
Cathode sheet, anode pole piece and isolation film 3 assemble in the way of winding or lamination, obtain naked battery core；Step 2, in naked battery core
Head and tail portion adjacent two layers isolation film 3 between drip upper glue, form micelle 2 after glue curing, multiple micelles 2 are by multilayer
Isolation film 3 is bonding；Step 3 implements encapsulation, perfusion electrolyte, infiltration, chemical synthesis technology process to naked battery core, obtains finished product lithium
Battery.Through lithium battery made from the above method, under the action of glue, multiple isolation films 3 can be adhesively secured together, with
It avoids isolation film 3 under hot environment from being heat-shrinked, and then improves the safety coefficient under lithium battery high temperature.Therefore, of the invention
The method of the raising lithium battery security performance of proposition, can be avoided the contraction of isolation film 3 under hot environment, improves the peace of lithium battery
Overall coefficient solves the problems, such as the field at this stage.
The method proposed by the present invention for improving lithium battery security performance, the position that micelle 2 is distributed are dispensing region, glue application region
The area in domain is less than the cross-sectional area of naked battery core, and the area in dispensing region and the ratio between the cross-sectional area of naked battery core can be 5%-
50%, to reduce the usage amount of glue while guaranteeing to be adhesively fixed.
The method proposed by the present invention for improving lithium battery security performance, four angles of naked battery core, which are dripped, glue, to avoid
There is the phenomenon that volume is stuck up in the surrounding of isolation film 3, and improves bond effect.
The method proposed by the present invention for improving lithium battery security performance, using automatic dispensing machine in adjacent two layers isolation film 3
Between drip upper glue, dispenser avoids the occurrence of the excessive or very few phenomenon of glue compared to amount for dispensing glue is more preferably controlled manually.
The time of the method proposed by the present invention for improving lithium battery security performance, glue curing is less than 1s, can be quickly real
Existing multiple isolation films 3 are adhesively fixed.
The method proposed by the present invention for improving lithium battery security performance, path of multiple micelles 2 on isolation film 3 can be in
Undaform or broken line type or bias type or other can play the linear of equivalent effect.
The method proposed by the present invention for improving lithium battery security performance, single micelle 2 can be elongated, strip micelle
2 length is less than 2mm, and width is less than 1.5mm；Single micelle 2 can be oval, and the height of single micelle 2 should be less than
0.15mm；On the one hand the energy density for not influencing battery, on the other hand will not influence the infiltration of electrolyte.
Comparative example 1
1, cathode sheet, anode pole piece and isolation film 3 are assembled into naked battery core in the way of lamination, in the head of naked battery core
Portion and tail portion respectively paste one around glue.
2, naked battery core is packaged, fluid injection, infiltration, chemical conversion, and finished product battery core is made.
3, it takes 10 battery cores completely to put in room temperature, then carries out 10 DEG C and completely fill, finally do 140 DEG C of 60min high temperature abuse tests；It surveys
Pinging standard is not smolder, is not on fire, not exploding；Testing percent of pass is 2/10.
4,5 battery cores are taken to do high temperature circulation test, the capacity retention ratio mean value after 500 circulations is 86.54%.
Embodiment 1
1, same cathode sheet, anode pole piece and isolation film 3 in above-mentioned comparative example 1 is taken to be assembled into the way of lamination
Naked battery core.
2, dispensing is carried out on naked battery core head with automatic dispensing machine, advanced along the width direction of battery, when dispensing is avoided
1 region of tab, and the naked battery core head corner Liang Ge respectively needs plus a dispensing；The thickness 0.01mm of micelle 2, width are
1.4mm, length 1.5mm, the dispensing route of automatic dispensing machine are bias type, as a result as shown in Figure 1.
3, dispensing is carried out in naked battery core tail portion after the same method, as a result as shown in Figure 2.
4, naked battery core is packaged, fluid injection, infiltration, chemical conversion, and finished product battery core is made.
5, it takes 10 battery cores completely to put in room temperature, then carries out 10 DEG C and completely fill, finally do 140 DEG C of 60min high temperature abuse tests.It surveys
Pinging standard is not smolder, is not on fire, not exploding.Testing percent of pass is 10/10.
6,5 battery cores are taken to do high temperature circulation test, the capacity retention ratio mean value after 500 circulations is 86.24%.
Embodiment 2
Difference from Example 1 is that path for dispensing glue is broken line type, as shown in Figure 3 and Figure 4.The survey of high temperature abuse
Trying percent of pass is 10/10；Capacity retention ratio mean value after 500 circulations is 86.83%.
The above result shows that the high temperature abuse test result of embodiment 1 and embodiment 2 is substantially better than prior art comparative example
1, and the performance of lithium battery is not influenced.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of method for improving lithium battery security performance, which is characterized in that including step：
Cathode sheet, anode pole piece and isolation film (3) are assembled in the way of winding or lamination, obtain naked battery core by step 1；
Step 2 drips upper glue, the glue curing between the naked battery core head and the adjacent two layers isolation film (3) of tail portion
Micelle (2) are formed afterwards, multiple micelles (2) are bonding by isolation film described in multilayer (3)；
Step 3 implements encapsulation, perfusion electrolyte, infiltration, chemical synthesis technology process to the naked battery core, obtains finished product lithium battery.
2. the method according to claim 1 for improving lithium battery security performance, which is characterized in that micelle (2) distribution
Position be dispensing region, the area in the dispensing region is less than the cross-sectional area of the naked battery core.
3. the method according to claim 2 for improving lithium battery security performance, which is characterized in that the face in the dispensing region
The ratio between long-pending and the naked battery core cross-sectional area is 5%-50%.
4. the method according to claim 1 for improving lithium battery security performance, which is characterized in that four of the naked battery core
Angle, which is dripped, the glue.
5. the method according to claim 1 for improving lithium battery security performance, which is characterized in that existed using automatic dispensing machine
Upper glue is dripped between isolation film described in adjacent two layers (3).
6. it is according to claim 1 improve lithium battery security performance method, which is characterized in that the glue curing when
Between be less than 1s.
7. the method according to claim 1 for improving lithium battery security performance, which is characterized in that multiple micelles (2)
Path on the isolation film (3) is in undaform or broken line type or bias type.
8. the method according to claim 1 for improving lithium battery security performance, which is characterized in that the single micelle (2)
Elongated, the length of micelle described in strip (2) is less than 2mm, and width is less than 1.5mm.
9. the method according to claim 1 for improving lithium battery security performance, which is characterized in that the single micelle (2)
It is oval.
10. the method according to claim 1 for improving lithium battery security performance, which is characterized in that the single micelle (2)
Height be less than 0.15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810645096.5A CN108832192A (en) | 2018-06-21 | 2018-06-21 | A method of improving lithium battery security performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810645096.5A CN108832192A (en) | 2018-06-21 | 2018-06-21 | A method of improving lithium battery security performance |
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| Publication Number | Publication Date |
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| CN108832192A true CN108832192A (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810645096.5A Pending CN108832192A (en) | 2018-06-21 | 2018-06-21 | A method of improving lithium battery security performance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212250A (en) * | 2019-06-01 | 2019-09-06 | 珠海冠宇电池有限公司 | A kind of lithium battery electric core |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03156861A (en) * | 1989-11-15 | 1991-07-04 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolyte secondary battery |
| JP2001357870A (en) * | 2000-06-12 | 2001-12-26 | Gs-Melcotec Co Ltd | Battery |
| CN203690386U (en) * | 2014-01-17 | 2014-07-02 | 东莞新能源科技有限公司 | Cell and electrochemical device |
| CN105428727A (en) * | 2015-12-24 | 2016-03-23 | 合肥国轩高科动力能源有限公司 | Manufacturing method of winding type laminated battery with diaphragm coated with adhesive to fix pole piece |
| CN107204415A (en) * | 2017-07-11 | 2017-09-26 | 力信（江苏）能源科技有限责任公司 | A kind of high temperature safe type battery core |
-
2018
- 2018-06-21 CN CN201810645096.5A patent/CN108832192A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03156861A (en) * | 1989-11-15 | 1991-07-04 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolyte secondary battery |
| JP2001357870A (en) * | 2000-06-12 | 2001-12-26 | Gs-Melcotec Co Ltd | Battery |
| CN203690386U (en) * | 2014-01-17 | 2014-07-02 | 东莞新能源科技有限公司 | Cell and electrochemical device |
| CN105428727A (en) * | 2015-12-24 | 2016-03-23 | 合肥国轩高科动力能源有限公司 | Manufacturing method of winding type laminated battery with diaphragm coated with adhesive to fix pole piece |
| CN107204415A (en) * | 2017-07-11 | 2017-09-26 | 力信（江苏）能源科技有限责任公司 | A kind of high temperature safe type battery core |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212250A (en) * | 2019-06-01 | 2019-09-06 | 珠海冠宇电池有限公司 | A kind of lithium battery electric core |
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Application publication date: 20181116 |