CN106785051A - A kind of method that flexible packing lithium ion battery internal moisture is reduced in preliminary filling formation process - Google Patents
A kind of method that flexible packing lithium ion battery internal moisture is reduced in preliminary filling formation process Download PDFInfo
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- CN106785051A CN106785051A CN201510813474.2A CN201510813474A CN106785051A CN 106785051 A CN106785051 A CN 106785051A CN 201510813474 A CN201510813474 A CN 201510813474A CN 106785051 A CN106785051 A CN 106785051A
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- Prior art keywords
- lithium ion
- preliminary filling
- moisture
- molecular sieve
- battery
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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
-
- 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
- H01M10/44—Methods for charging or discharging
-
- 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)
- Filling, Topping-Up Batteries (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of method that flexible packing lithium ion battery internal moisture is reduced in preliminary filling formation process for belonging to technical field of lithium ion.The method, using the moisture in molecular sieve Electolyte-absorptive, reduces inside battery moisture in flexible packing lithium ion battery preliminary filling formation process.The flexible packing lithium ion battery of preliminary filling chemical conversion is carried out for reserving airbag, molecular sieve is enclosed in airbag, after preliminary filling chemical conversion terminates, molecular sieve and airbag are removed together, then carry out cell package.For the flexible packing lithium ion battery that preliminary filling chemical conversion is carried out using negative pressure system, molecular sieve is put into the electrolyte loop or electrolyte liquid storage bottle of negative pressure system.Using the method for the present invention, the moisture of inside battery can be effectively reduced, be absorbed by molecular sieve from the environment into the moisture in lithium-ion battery electrolytes, reduce influence of the extraneous ambient moisture to inside battery in preliminary filling formation process, and it is simple to operate.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to one kind reduces soft in preliminary filling formation process
The method for packing inside lithium ion cell moisture.
Background technology
With the development of new-energy automobile, lithium ion battery is due to high, good cycle of energy density etc.
Advantage, gets more and more people's extensive concerning.
Lithium ion battery is mainly made up of positive pole, negative pole, barrier film and electrolyte, electrochemistry of the moisture to battery
Performance and security performance have important influence.Micro-moisture in pole piece and electrolyte can with electrolyte in
LiPF6Etc. fluorine-containing lithium salts react generation HF, destruction negative pole and electrolyte interface SEI films, shorten electricity
In the pond life-span, cause battery bulging, reduce the chemical property of battery.If inside battery moisture is too high,
In preliminary filling formation process, battery can produce substantial amounts of gas, cause battery capacity to decline, cycle performance reduction,
Battery bulging even causes more serious safety problem.
Therefore, it is necessary to the moisture in both positive and negative polarity raw material and electrolyte in lithium ion battery manufacturing process
Strict control.In the pre-assembly, raw material and both positive and negative polarity pole piece can be through overbaking reduction water for lithium ion battery
Point.Lithium ion battery after assembly, it is necessary to give battery injection electrolyte, then carry out preliminary filling chemical conversion.It is right
In flexible packing lithium ion battery, it will usually reserve airbag or air bag to store the gas produced in preliminary filling formation process
Body, chemical conversion cuts off airbag and then encapsulates after terminating；Or use negative pressure system and flexible packing lithium ion battery phase
Even, the gas produced in preliminary filling formation process is excluded using negative pressure, liquid storage bottle or storage is provided with negative pressure system
Liquid pipe come store negative pressure extraction electrolyte, at the end of chemical conversion, by negative pressure extract out electrolyte through electrolyte return
Road is back in battery.In above-mentioned preliminary filling formation process, the moisture in environment can slowly enter inside battery,
And the moisture that this process is introduced into does not have effective method to remove in subsequent process, can stay in battery always
Portion affects the performance of battery.
It is, thus, sought for a kind of effective method reduces in flexible packing lithium ion battery preliminary filling formation process
Influence of the ambient moisture to inside battery, so as to reduce the moisture of inside battery.
The content of the invention
In order to solve the above problems, Soft Roll is reduced in preliminary filling formation process it is an object of the invention to provide one kind
The method for filling inside lithium ion cell moisture.
The technical scheme is that：
A kind of method for reducing flexible packing lithium ion battery internal moisture, the method is in flexible packing lithium ion electric
In the preliminary filling formation process of pond, using the moisture in molecular sieve Electolyte-absorptive, to reduce inside battery moisture.
Wherein, the flexible packing lithium ion battery of preliminary filling chemical conversion is carried out for reserving airbag (or air bag), in gas
Molecular sieve is enclosed in bag.After preliminary filling chemical conversion terminates, molecular sieve and airbag are removed together, then carry out battery
Sealing.
Wherein, the flexible packing lithium ion battery of preliminary filling chemical conversion is carried out for use negative pressure system, in negative pressure system
Electrolyte loop or electrolyte liquid storage bottle in be put into molecular sieve.
Preferably, the quality of the molecular sieve is the 1%~10% of lithium ion battery injection electrolyte quality.
Preferably, the molecular sieve is lithium type molecular sieve.
Above-mentioned lithium type molecular sieve obtains product for commercially available.
Beneficial effects of the present invention are：
On the basis of current flexible packing lithium ion battery preliminary filling formation process, there is provided one kind utilizes molecule
Sieve Electolyte-absorptive in moisture method, can effectively reduce the moisture inside resultant battery, should during from
The moisture entered in lithium-ion battery electrolytes in environment is absorbed by molecular sieve, reduces preliminary filling formation process at home and abroad
Influence of boundary's ambient moisture to inside battery, and simple to operate, molecular sieve reusable edible, cost
Cheap, effect is obvious.
Brief description of the drawings
Fig. 1 is that reserved airbag carries out molecular sieve present position in the flexible packing lithium ion battery pattern of preliminary filling chemical conversion
Schematic diagram.
During Fig. 2 is the pattern of the flexible packing lithium ion battery that preliminary filling chemical conversion is carried out using negative pressure system, in liquid storage
Molecular sieve schematic diagram is placed in bottle.
Marked in figure, 1 is lithium ion battery cell, 2 is aluminum-plastic membrane used for packaging, 3 is airbag, 4 is molecular sieve,
5 is electrolyte loop, 6 is liquid storage bottle, 7 is vavuum pump, 8 is battery plus-negative plate lug, 9 is that battery core is gentle
Edge sealing between bag.
Specific embodiment
More detailed explanation is done to the method for the present invention with reference to specific embodiment.But the present invention is not limited to
Following examples.
Embodiment 1
Reserved airbag carries out preliminary filling chemical conversion (multigroup parallel test)：
8 positive plates and 9 negative plates wrapped by barrier film are taken, negative pole, positive pole, negative pole are successively after lamination
Obtain battery core 1, welding both positive and negative polarity lug 8.An aluminum plastic film 2 is taken, punching hole (battery core is cheated and airbag hole) is right
Battery core 1 is encased after folding completely, is packaged, such as Fig. 1, seal battery top (lug side), the left side (nothing
Airbag side) and it is following, then seal battery core and the edge sealing between battery core and airbag 9, battery core and airbag
Between have 2~5cm width do not carry out plastic packaging, communicated for left and right position (battery core and airbag).Using identical
Method makes 9 battery cores altogether.Battery core is encapsulated after vacuum bakeout, injects 50g electrolyte.Wherein 3 electricity
Core (being designated as A groups) takes 5g molecular sieves 4, is put into after being wrapped with barrier film in airbag 3, then closedtop.In addition
3 battery cores (being designated as B groups) take 2.5g molecular sieves 4, are put into after being wrapped with barrier film in airbag 3, then closedtop.
Remaining 3 (contrast groups) do not place molecular sieve, direct closedtop.24h is shelved after battery liquid-filling, is carried out pre-
Chemical conversion is filled, after the completion of chemical conversion, is vacuumized, sanction removes airbag, sealed.Electricity is tested using coulomb moisture tester
The moisture of pond electrolyte inside, the inside battery moisture that molecular sieve is put into airbag is substantially controlled lower
Level.Specific moisture measurement result see the table below 1.
Table 1 reserves airbag and carries out preliminary filling chemical conversion battery moisture test result
Embodiment 2
Preliminary filling chemical conversion (multigroup parallel test) of negative pressure system：
8 positive plates and 9 negative plates wrapped by barrier film are taken, negative pole, positive pole, negative pole are successively after lamination
Obtain battery core 1, welding both positive and negative polarity lug 8.An aluminum plastic film 2 is taken, doubling encases battery core completely behind punching hole,
It is packaged, such as Fig. 2, seals following and left side on battery, after battery core is through overbaking, seals battery right side
Side simultaneously reserves liquid injection hole.Make 9 batteries altogether using same procedure.From liquid injection hole to battery liquid-filling 50g, electricity
Pond is connected through electrolyte loop 5 with electrolyte liquid storage bottle 6, and liquid storage bottle 6 is connected with vavuum pump 7, wherein three
5g molecular sieves are put into branch battery (being designated as A groups) liquid storage bottle 6, in addition 3 battery (being designated as B groups) storages
2.5g molecular sieves are put into liquid bottle 6, molecular sieve is not placed in last 3 (contrast groups) liquid storage bottles.Battery
In preliminary filling formation process, vavuum pump keeps certain negative pressure, and the electrolyte being had more than needed in battery is pumped down to liquid storage bottle 6
In contacted with molecular sieve, the moisture in electrolyte by molecular sieve absorb remove.After the completion of preliminary filling chemical conversion, necessarily
Amount electrolyte is back to inside battery through electrolyte loop, then by battery seal.Using coulomb moisture measurement
Instrument tests the moisture of inside battery electrolyte, and the moisture quilt of the inside battery electrolyte of molecular sieve is put into airbag
Control is in lower level.Specific moisture measurement result see the table below.
The preliminary filling chemical conversion battery moisture test result of the negative pressure system of table 2
Claims (5)
1. it is a kind of reduce flexible packing lithium ion battery internal moisture method, it is characterised in that：In flexible packing lithium ion
In battery preliminary filling formation process, the moisture in molecular sieve Electolyte-absorptive is used.
2. the method for claim 1, it is characterised in that the quality of the molecular sieve is injection lithium ion battery
Electrolyte quality 1%~10%.
3. method as claimed in claim 1 or 2, it is characterised in that the molecular sieve is lithium type molecular sieve.
4. the method as described in claim 1,2 or 3, it is characterised in that：Preliminary filling is carried out for reserved airbag
Into flexible packing lithium ion battery, the molecular sieve is enclosed in airbag.
5. the method as described in claim 1,2 or 3, it is characterised in that：It is pre- for being carried out using negative pressure system
The flexible packing lithium ion battery of chemical conversion is filled, is put into the electrolyte loop or electrolyte liquid storage bottle of negative pressure system
The molecular sieve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510813474.2A CN106785051A (en) | 2015-11-23 | 2015-11-23 | A kind of method that flexible packing lithium ion battery internal moisture is reduced in preliminary filling formation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510813474.2A CN106785051A (en) | 2015-11-23 | 2015-11-23 | A kind of method that flexible packing lithium ion battery internal moisture is reduced in preliminary filling formation process |
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| CN106785051A true CN106785051A (en) | 2017-05-31 |
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| CN201510813474.2A Pending CN106785051A (en) | 2015-11-23 | 2015-11-23 | A kind of method that flexible packing lithium ion battery internal moisture is reduced in preliminary filling formation process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353701A (en) * | 2018-10-31 | 2019-02-19 | 广东金光高科股份有限公司 | It is a kind of to keep the pail pack that quality is stable during lithium battery electrolytes storage transport |
| CN109742455A (en) * | 2018-12-24 | 2019-05-10 | 深圳市量能科技有限公司 | A kind of production method of lithium ion battery |
| CN113646939A (en) * | 2019-09-06 | 2021-11-12 | 株式会社Lg新能源 | Prelithiation reaction chamber equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1398012A (en) * | 2001-07-13 | 2003-02-19 | 比亚迪股份有限公司 | Method for manufacturing thin lithium ion battery |
| CN102107093A (en) * | 2010-12-29 | 2011-06-29 | 东莞市杉杉电池材料有限公司 | Method for carrying out water removal and acid reduction on electrolyte of lithium ion battery and lithium type molecular sieve thereof |
-
2015
- 2015-11-23 CN CN201510813474.2A patent/CN106785051A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1398012A (en) * | 2001-07-13 | 2003-02-19 | 比亚迪股份有限公司 | Method for manufacturing thin lithium ion battery |
| CN102107093A (en) * | 2010-12-29 | 2011-06-29 | 东莞市杉杉电池材料有限公司 | Method for carrying out water removal and acid reduction on electrolyte of lithium ion battery and lithium type molecular sieve thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353701A (en) * | 2018-10-31 | 2019-02-19 | 广东金光高科股份有限公司 | It is a kind of to keep the pail pack that quality is stable during lithium battery electrolytes storage transport |
| CN109742455A (en) * | 2018-12-24 | 2019-05-10 | 深圳市量能科技有限公司 | A kind of production method of lithium ion battery |
| CN113646939A (en) * | 2019-09-06 | 2021-11-12 | 株式会社Lg新能源 | Prelithiation reaction chamber equipment |
| US11967699B2 (en) | 2019-09-06 | 2024-04-23 | Lg Energy Solution, Ltd. | Pre-lithiation reaction chamber apparatus |
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