CN108390009A - A kind of pressurized liquid injection technique of lithium ion battery - Google Patents
A kind of pressurized liquid injection technique of lithium ion battery Download PDFInfo
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- CN108390009A CN108390009A CN201810035476.7A CN201810035476A CN108390009A CN 108390009 A CN108390009 A CN 108390009A CN 201810035476 A CN201810035476 A CN 201810035476A CN 108390009 A CN108390009 A CN 108390009A
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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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
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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
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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
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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
- 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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Abstract
The present invention relates to a kind of pressurized liquid injection techniques of lithium ion battery, including step：（1）0.3 ~ 0.7MPa is forced into identical compression rate simultaneously to inside battery and outside, pressure keeps 5 ~ 30S；（2）Inside battery is vacuumized；（3）It injects the electrolyte into lithium ion battery；（4）Repeat step（1）—（2）Pressurization vacuumizes n times, and 1 fluid injection is completed in n >=1；Optional（5）Repeat step（3）—（4）M times, multiple fluid injection, the step are completed in m >=1（1）In compression rate be 0.05 ~ 0.2 MPa/S.The present invention to adding identical high pressure simultaneously inside and outside battery, after the Electrostatic Absorption between positive plate, isolation film and negative plate is opened, then vacuum pumping liquid injection again, repeatedly cycle is pressurizeed and is vacuumized after fluid injection, battery case will not deform, and electrolyte, which can smoothly permeate, to be reached in the middle part of core, to improve fluid injection efficiency, the present invention has a wide range of application, highly practical.
Description
Technical field
The present invention relates to technical field of lithium ion, and in particular to a kind of pressurized liquid injection technique of lithium ion battery.
Background technology
With the extensive use and fast development of lithium ion battery, market is to performances such as the energy density of lithium ion battery and capacity
It is required that being continuously improved.Due to the demand of lithium ion battery high-energy density high power capacity, increasingly tighter, the battery core internalization of electric core winding
Learn substance increase, reduced space, such as using common liquid injection process：Fluid injection-vacuumize-pressurize-is static；It vacuumize-notes
Liquid-pressurization-is static, and electrolyte smooth can not permeate, fluid injection become it is extremely difficult and time-consuming, present fluid injection process at
For the bottleneck of whole production line.For breakthrough bottleneck, each research institution and battery production commercial city are trying to explore to study battery note
Liquid technique and liquid-injection equipment, but still can not solve the problems, such as that lithium ion battery liquid injection is difficult, fluid injection efficiency is low well at present.
Patent CN101882674B discloses lithium battery priming device and its technique, the processing step：Electrolyte will be put into
Lithium battery be placed in vacuum (-tight) housing, vacuumize, be then returned to atmospheric pressure, 0.03 ~ 0.05 megapascal is injected into vacuum (-tight) housing
Nitrogen is restored to atmospheric pressure, vacuumizes again, restores normal pressure, lithium battery is taken out, the pressure of the invention nitrogen only only has
0.03 ~ 0.05 megapascal, thus it is very little to the improvement of fluid injection efficiency.
Patent CN102299272B discloses a kind of battery and electrolyte filling method, which uses from battery bottom fluid injection, from
The fluid injection mode that the safe valve opening in top vacuumizes, reduces the bubble of inside battery, effectively shortens the fluid injection time, but shell
Internal portion is negative pressure, and outside is dry gas, and shell inside and outside differential pressure can make the inside crimp of shell, and lead to actual battery has
Smaller volume is imitated, and then reduces effective fluid injection volume.
Patent 2017102937120 discloses a kind of novel battery pressurized liquid injection structure, 2017102937120 disclosure of patent
Battery pressurized liquid injection method, device and equipment, above two structure can simultaneously pressurize to inside and outside battery, and pressure can be up to
0.6MPa not only increases fluid injection efficiency, and battery case will not deform, but above-mentioned patent gives battery after fluid injection
Inside and outside to pressurize simultaneously, the fluid injection efficiency of battery is not improved too much in fact.
201610984104 .X of patent discloses a kind of liquid injection process of high specific energy lithium ion battery, and the technology utilization is high
After pressing nitrogen to carry out pulsed impact to liquid injection hole to open the Electrostatic Absorption between positive plate, isolation film and negative plate,
To improve fluid injection efficiency, but pulse-pressure can open the Electrostatic Absorption near liquid injection hole completely, and to far from note
Play the role of comparatively just reducing a lot in the region of fluid apertures.
Invention content
The present invention is to solve the problems, such as that lithium ion battery liquid injection is difficult, fluid injection efficiency is low, it is proposed that a kind of lithium ion battery
Pressurized liquid injection technique.
The present invention is to realize that above-mentioned target adopts the technical scheme that：
A kind of pressurized liquid injection technique of lithium ion battery, which is characterized in that the pressurized liquid injection technique includes the following steps：
（1）0.3 ~ 0.7MPa is forced into identical compression rate simultaneously to inside battery and outside, pressure keeps 5 ~ 30S；
（2）Inside battery is vacuumized；
（3）It injects the electrolyte into lithium ion battery；
（4）Repeat step（1）—（2）Pressurization vacuumizes n times, and 1 fluid injection is completed in n >=1；
Optional（5）Repeat step（3）—（4）M times, multiple fluid injection is completed in m >=1；
When completing a fluid injection, a step is at least needed（3）-（4）；
When completing multiple fluid injection, at least in step（3）-（4）On the basis of progress, step is repeated（3）—（4）M times；Wherein
Repeatedly be（m+1）It is secondary；
The step（1）In compression rate be 0.05 ~ 0.2 MPa/S.
The step（3）In injection electrolyte be electrolyte total amount 1/2 ~ 5/6.
The step（4）In n=3 ~ 10, preferably n=6-8.
The step（5）In m=1 ~ 5, preferably m=1-3.
The step（1）Need to detect battery vacuum-pumping the air-tightness of battery before.
The beneficial effects of the invention are as follows：To adding identical high pressure inside and outside battery simultaneously to by positive plate, be isolated before fluid injection
Electrostatic Absorption between film and negative plate is opened, then vacuum pumping liquid injection again, repeatedly cycle pressurization and is vacuumized, battery after fluid injection
Shell will not deform, and electrolyte, which can smoothly permeate, to be reached in the middle part of core, to improve fluid injection efficiency, application of the present invention
Range is wide, highly practical.
Specific implementation mode
In order to make goal of the invention, technical solution and its advantageous effects of the present invention be more clear, below in conjunction with comparing
The present invention will be described in further detail with specific embodiment for example.It should be understood that specific reality described in this specification
Example is applied merely to explaining the present invention, is not intended to limit the present invention.
All substances are commercially available in following comparative examples and embodiment.
The measurement method of reservoir quantity and fluid injection time in following comparative examples and embodiment：
After reservoir quantity=fluid injection before weight-fluid injection of battery battery weight；
The fluid injection time directly terminates the entire time used with timer from fluid injection start recording to fluid injection.
Comparative example 1（From patent 2017102937120）
To " LFP23140160-55Ah " battery liquid-filling, design reservoir quantity 150g, battery is rolled, assembly, it is dry, survey short circuit and
Start fluid injection after weighing, battery is rolled, assembly, drying, surveys short circuit and starts fluid injection, specific fluid injection step after weighing：（1）It is right
Inside battery is vacuumized, and vacuum degree reaches -0.09Mpa, keeps 25s；（2）The electrolyte of 110g is injected into lithium ion battery
In；（3）0.6MPa is forced into simultaneously to inside battery and outside, compression rate is 0.1 MPa/S, and pressure keeps 30s；（4）It is right
Inside battery is vacuumized, until vacuum degree reaches -0.09Mpa, keeps 25s；（5）Repeat step（3）With（4）9 times；（6）It will
In the electrolyte injection lithium ion battery of 40g；（7）Repeat step（3）With（4）It 10 times, takes out battery seal and weighs.
Embodiment 1
To " LFP23140160-55Ah " battery liquid-filling, design reservoir quantity 150g, battery is rolled, assembly, it is dry, survey short circuit and
Start fluid injection after weighing, battery is rolled, assembly, drying, surveys short circuit and starts fluid injection, specific fluid injection step after weighing：（1）
Inside battery is vacuumized, until vacuum degree reaches -0.09Mpa, keeps 25s；（2）It pressurizes simultaneously to inside battery and outside
To 0.6MPa, compression rate 0.1MPa/S, pressure keeps 30s；（3）Inside battery is vacuumized, vacuum degree reaches-
0.09MPa keeps 25s；（4）It will be in the electrolyte injection lithium ion battery of 110g；（5）Repeat step（2）With（3）6 times；（6）
40g electrolyte is injected in lithium ion battery；（7）Repeat step（2）With（3）It 6 times, takes out battery seal and weighs.
Comparative example 1 and the fluid injection time in embodiment 1 and reservoir quantity are recorded, as a result such as table 1.
1. liquid injection process of the present invention of table is compared with conventional pressurized fluid injection mode
As it can be seen from table 1 fluid injection efficiency can be significantly improved by adding high pressure simultaneously to battery inside and outside before fluid injection, this is because note
To adding identical high pressure to open the Electrostatic Absorption between positive plate, isolation film and negative plate simultaneously inside and outside battery before liquid,
Then vacuum pumping liquid injection again repeatedly cycle pressurization and vacuumizes after fluid injection, and battery case will not deform, electrolyte
Smoothly infiltration reaches in the middle part of core, and it is efficient to improve fluid injection.
Comparative example 2（From patent 201610984104X）
To " LFP23140160-55Ah " battery liquid-filling, design reservoir quantity 150g, battery is rolled, assembly, it is dry, survey short circuit and
Start fluid injection after weighing, battery is rolled, assembly, drying, surveys short circuit and starts fluid injection, specific fluid injection step after weighing：（1）
Pulsed impact is carried out to inside battery by liquid injection hole using the nitrogen of 0.6MPa, pulse number is 9 times, each pulse-pressure
Time is 2S, and each inter-train pause is 2S；（2）It is evacuated to vacuum degree and reaches -0.085MPa, keep 25S；（3）By 110g electricity
It solves in liquid injection lithium ion battery；（4）0.6MPa, compression rate 0.1MPa/S are forced into simultaneously to inside battery and outside,
Pressure keeps 30s；（5）Inside battery is vacuumized, vacuum degree reaches -0.085MPa, keeps 25s；（6）Repeat step
（4）With（5）5 times；（7）40g electrolyte is injected in lithium ion battery；（8）Repeat step（4）With（5）6 times, take out battery envelope
Mouth is weighed.
Embodiment 2
To " LFP23140160-55Ah " battery liquid-filling, design reservoir quantity 150g, battery is rolled, assembly, it is dry, survey short circuit and
Start fluid injection after weighing, battery is rolled, assembly, drying, surveys short circuit and starts fluid injection, specific fluid injection step after weighing：（1）
Inside battery is vacuumized, until vacuum degree reaches -0.085MPa, keeps 25S；（2）Inside battery and outside are added simultaneously
It is depressed into 0.6MPa, compression rate 0.1MPa/S, pressure keeps 30S；（3）Inside battery is vacuumized, vacuum degree reaches-
0.085MPa keeps 25S；（4）It will be in the electrolyte injection lithium ion battery of 110g；（5）Repeat step（2）With（3）6 times；（6）
40g electrolyte is injected in lithium ion battery；（7）Repeat step（2）With（3）It 6 times, takes out battery seal and weighs.
Comparative example 2 and the fluid injection time in embodiment 2 and reservoir quantity are recorded, as a result such as table 2.
2. liquid injection process of the present invention of table is compared with pulse-pressure fluid injection mode
From table 2 it can be seen that in the case of the same fluid injection time, significantly increased using liquid injection process reservoir quantity of the present invention, this
Be because fluid injection before to inside and outside battery simultaneously plus identical high pressure to by between positive plate, isolation film and negative plate electrostatic suction
Attached opening, although and can play the role of using pulse-pressure opening Electrostatic Absorption in comparative example 2, pulse-pressure can be with
The Electrostatic Absorption near liquid injection hole is opened completely, and plays the role of comparatively just reducing to the region far from liquid injection hole
It is very much.
Comparative example 3
To " LFP23140160-55Ah " battery liquid-filling, design reservoir quantity 150g, battery is rolled, assembly, it is dry, survey short circuit and
Start fluid injection after weighing, battery is rolled, assembly, drying, surveys short circuit and starts fluid injection, specific fluid injection step after weighing：（1）
Inside battery is vacuumized, until vacuum degree reaches -0.08MPa, keeps 25S；（2）It pressurizes simultaneously to inside battery and outside
To 0.2MPa, compression rate 0.1MPa/S, pressure keeps 30S；（3）Inside battery is vacuumized, vacuum degree reaches-
0.08MPa keeps 25S；（4）It will be in the electrolyte injection lithium ion battery of 110g；（5）Repeat step（2）With（3）6 times；（6）
40g electrolyte is injected in lithium ion battery；（7）Repeat step（2）With（3）It 6 times, takes out battery seal and weighs.
Comparative example 4
With comparative example 3 the difference is that step（2）In to inside battery and external be forced into 0.8MPa simultaneously.
Embodiment 3
With comparative example 3 the difference is that step（2）In to inside battery and external be forced into 0.3MPa simultaneously.
Embodiment 4
With comparative example 3 the difference is that step（2）In to inside battery and external be forced into 0.6MPa simultaneously.
Embodiment 5
With comparative example 3 the difference is that step（2）In to inside battery and external be forced into 0.7MPa simultaneously.
Comparative example 5
With comparative example 3 the difference is that step（2）In to inside battery and it is external be forced into 0.6MPa simultaneously, pressure keeps 5S.
Comparative example 6
With comparative example 3 the difference is that step（2）In to inside battery and it is external be forced into 0.6MPa simultaneously, pressure is kept
55S。
Embodiment 6
With comparative example 3 the difference is that step（2）In to inside battery and it is external be forced into 0.6MPa simultaneously, pressure keeps 10
S。
Embodiment 7
With comparative example 3 the difference is that step（2）In to inside battery and it is external be forced into 0.6MPa simultaneously, pressure is kept
20S。
Embodiment 8
With comparative example 3 the difference is that step（2）In to inside battery and it is external be forced into 0.6MPa simultaneously, pressure is kept
40S。
Embodiment 9
With comparative example 3 the difference is that step（2）In to inside battery and it is external be forced into 0.6MPa simultaneously, pressure is kept
50S。
Comparative example 7
With comparative example 3 the difference is that step（2）Middle compression rate is 0.02MPa/S.
Comparative example 8
With comparative example 3 the difference is that step（2）Middle compression rate is 0.25MPa/S.
Embodiment 10
With comparative example 3 the difference is that step（2）Middle compression rate is 0.05MPa/S.
Embodiment 11
With comparative example 3 the difference is that step（2）Middle compression rate is 0.2MPa/S.
Comparative example 3 ~ 8 and the fluid injection time in embodiment 4 ~ 11 and reservoir quantity are recorded, as a result such as table 3.
The influence of pressure size, pressing time and compression rate to fluid injection efficiency when 3. battery of table pressurizes
From table 3 it can be seen that can influence fluid injection effect to the pressure size of external pressurized, pressing time and compression rate in battery
Rate.From comparative example 3,4 and embodiment 3 ~ 5 as can be seen that hypotony is unfavorable for improving fluid injection efficiency when pressurizeing, this is because pressure
Power is too low cannot to open Electrostatic Absorption, and although the excessive fluid injection efficiency of pressure has and slightly improves, but to requirements such as liquid injecting clamps
It is very high, cost can be increased, and the fluid injection time also increases, from whole fluid injection efficiency consider, optimal moulding pressure be 0.5 ~
0.6MPa；From comparative example 5,6 and embodiment 4,6 ~ 9 as can be seen that pressing time it is too short be unfavorable for improving fluid injection efficiency, this be because
Cannot open Electrostatic Absorption for pressure time is short, and increase with the growth of pressing time, when reservoir quantity approaches to saturation it is very slow,
Instead total fluid injection time is extended, is considered from whole fluid injection efficiency, optimal pressing time is 20 ~ 40S；From comparative example 7,8 and
Embodiment 4,10 and 11 can lengthen the entire fluid injection time as can be seen that compression rate is too low, can contract although compression rate is excessively high
The short fluid injection time, but it is very high to requirements such as liquid injecting clamps, cost can be increased, considered from whole fluid injection efficiency, optimal pressurization speed
Rate is 0.08 ~ 0.12MPa/S.
Comparative example 9
To " LFP23140160-55Ah " battery liquid-filling, design reservoir quantity 150g, battery is rolled, assembly, it is dry, survey short circuit and
Start fluid injection after weighing, battery is rolled, assembly, drying, surveys short circuit and starts fluid injection, specific fluid injection step after weighing：（1）
Inside battery is vacuumized, until vacuum degree reaches -0.075MPa, keeps 25S；（2）Inside battery and outside are added simultaneously
It is depressed into 0.6MPa, compression rate 0.1MPa/S, pressure keeps 30S；（3）Inside battery is vacuumized, vacuum degree reaches-
0.075MPa keeps 25S；（4）It will be in the electrolyte injection lithium ion battery of 110g；（5）Repeat step（2）With（3）2 times；（6）
40g electrolyte is injected in lithium ion battery；（7）Repeat step（2）With（3）It 2 times, takes out battery seal and weighs.
Comparative example 10
With comparative example 9 the difference is that（5）Repeat step（2）With（3）11 times；（7）Repeat step（2）With（3）11 times.
Embodiment 12
With comparative example 9 the difference is that（5）Repeat step（2）With（3）3 times；（7）Repeat step（2）With（3）3 times.
Embodiment 13
With comparative example 9 the difference is that（5）Repeat step（2）With（3）6 times；（7）Repeat step（2）With（3）6 times.
Embodiment 14
With comparative example 9 the difference is that（5）Repeat step（2）With（3）8 times；（7）Repeat step（2）With（3）8 times.
Embodiment 15
With comparative example 9 the difference is that（5）Repeat step（2）With（3）10 times；（7）Repeat step（2）With（3）10 times.
Comparative example 9 ~ 10 and the fluid injection time in embodiment 12 ~ 15 and reservoir quantity are recorded, as a result such as table 4.
Influence of the pressurization evacuation cycle number to fluid injection efficiency after 4. fluid injection of table
From table 4, it can be seen that the evacuation cycle number that pressurizes after fluid injection can influence fluid injection efficiency, the very few reservoir quantity of cycle-index is too
It is few, although and cycle-index increases the increase of fluid injection time, the fluid injection time also increases, and considers from whole fluid injection efficiency, most
Excellent pressurization evacuation cycle number 6 ~ 8 times.
Comparative example 11
To " LFP23140160-55Ah " battery liquid-filling, design reservoir quantity 150g, battery is rolled, assembly, it is dry, survey short circuit and
Start fluid injection after weighing, battery is rolled, assembly, drying, surveys short circuit and starts fluid injection, specific fluid injection step after weighing：（1）
Inside battery is vacuumized, until vacuum degree reaches -0.08MPa, keeps 25S；（2）It pressurizes simultaneously to inside battery and outside
To 0.6MPa, compression rate is 0.1 MPa/S, and pressure keeps 30S；（3）Inside battery is vacuumized, vacuum degree reaches-
0.08MPa keeps 25S；（4）It will be in the electrolyte injection lithium ion battery of 150g；（5）Repeat step（2）With（3）It 14 times, takes
Go out battery seal to weigh.
Comparative example 12
With comparative example 9 the difference is that（4）It will be in the electrolyte injection lithium ion battery of 85g；（5）Repeat step（2）With（3）6
It is secondary；（6）It will be in the electrolyte injection lithium ion battery of 30g；（7）Repeat step（2）With（3）5 times；（8）The electrolyte of 15g is noted
Enter in lithium ion battery；（10）Repeat step（2）With（3）3 times；（11）It will be in the electrolyte injection lithium ion battery of 10g；（12）
Repeat step（2）With（3）3 times；（13）It will be in the electrolyte injection lithium ion battery of 5g；（14）Repeat step（2）With（3）2 times；
（15）It will be in the electrolyte injection lithium ion battery of 3g；（16）Repeat step（2）With（3）2 times；（17）The electrolyte of 2g is injected
In lithium ion battery；（18）Repeat step（2）With（3）It 1 time, takes out battery seal and weighs.
Embodiment 16
With comparative example 9 the difference is that（4）It will be in the electrolyte injection lithium ion battery of 120g；（5）Repeat step（2）With（3）
8 times；（6）It will be in the electrolyte injection lithium ion battery of 30g；（7）Repeat step（2）With（3）It 6 times, takes out battery seal and weighs.
Embodiment 17
With comparative example 9 the difference is that（4）It will be in the electrolyte injection lithium ion battery of 100g；（5）Repeat step（2）With（3）
7 times；（6）It will be in the electrolyte injection lithium ion battery of 30g；（7）Repeat step（2）With（3）6 times；（8）By the electrolyte of 20g
It injects in lithium ion battery；（9）Repeat step（2）With（3）It 5 times, takes out battery seal and weighs.
Embodiment 18
With comparative example 9 the difference is that（4）It will be in the electrolyte injection lithium ion battery of 90g；（5）Repeat step（2）With（3）6
It is secondary；（6）It will be in the electrolyte injection lithium ion battery of 30g；（7）Repeat step（2）With（3）5 times；（8）The electrolyte of 20g is noted
Enter in lithium ion battery；（9）Repeat step（2）With（3）4 times；（9）It will be in the electrolyte injection lithium ion battery of 10g；（10）Weight
Multiple step（2）With（3）It 3 times, takes out battery seal and weighs.
Embodiment 19
With comparative example 9 the difference is that（4）It will be in the electrolyte injection lithium ion battery of 90g；（5）Repeat step（2）With（3）6
It is secondary；（6）It will be in the electrolyte injection lithium ion battery of 30g；（7）Repeat step（2）With（3）5 times；（8）The electrolyte of 15g is noted
Enter in lithium ion battery；（9）Repeat step（2）With（3）3 times；（9）It will be in the electrolyte injection lithium ion battery of 10g；（10）Weight
Multiple step（2）With（3）3 times；（11）It will be in the electrolyte injection lithium ion battery of 5g；（12）Repeat step（2）With（3）It 2 times, takes
Go out battery seal to weigh.
Embodiment 20
With comparative example 9 the difference is that（4）It will be in the electrolyte injection lithium ion battery of 85g；（5）Repeat step（2）With（3）6
It is secondary；（6）It will be in the electrolyte injection lithium ion battery of 30g；（7）Repeat step（2）With（3）5 times；（8）The electrolyte of 15g is noted
Enter in lithium ion battery；（9）Repeat step（2）With（3）3 times；（9）It will be in the electrolyte injection lithium ion battery of 10g；（10）Weight
Multiple step（2）With（3）3 times；（11）It will be in the electrolyte injection lithium ion battery of 5g；（12）Repeat step（2）With（3）2 times；
（13）It will be in the electrolyte injection lithium ion battery of 5g；（14）Repeat step（2）With（3）It 2 times, takes out battery seal and weighs.
Comparative example 11,12 and the fluid injection time in embodiment 16 ~ 20 and reservoir quantity are recorded, as a result such as table 5.
Influence of the 5. fluid injection number of table to battery liquid-filling effect
As can be seen from Table 5, although the disposable fluid injection time is shorter, reservoir quantity is more than or equal to 2 less than 140g, fluid injection number
Afterwards, as fluid injection number increases, reservoir quantity increases, after the fluid injection time is also increasing, but fluid injection number is more than or equal to 3, fluid injection
Amount increase is very faint, and after fluid injection number is more than or equal to 6, reservoir quantity considers almost without increase from whole fluid injection efficiency, optimal
Fluid injection number is 2 ~ 4 times.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is changed, and therefore, the invention is not limited in above-mentioned specific implementation mode, every those skilled in the art exist
Made any conspicuously improved, replacement or modification belongs to protection scope of the present invention on the basis of the present invention.In addition,
Although having used some specific terms in this specification, these terms are merely for convenience of description, not to structure of the present invention
At any limitation.
Claims (6)
1. a kind of pressurized liquid injection technique of lithium ion battery, which is characterized in that the pressurized liquid injection technique includes the following steps：
0.3 ~ 0.7MPa is forced into identical compression rate simultaneously to inside battery and outside, pressure keeps 5 ~ 30S；
Inside battery is vacuumized；
It injects the electrolyte into lithium ion battery；
Repeat step（1）—（2）Pressurization vacuumizes n times, and 1 fluid injection is completed in n >=1；
Optional（5）Repeat step（3）—（4）M times, multiple fluid injection is completed in m >=1.
2. a kind of pressurized liquid injection technique of lithium ion battery according to claim 1, which is characterized in that the step（1）
In compression rate be 0.05 ~ 0.2 MPa/S.
3. a kind of pressurized liquid injection technique of lithium ion battery according to one of claim 1-2, which is characterized in that the step
Suddenly（3）In injection electrolyte be electrolyte total amount 1/2 ~ 5/6.
4. a kind of pressurized liquid injection technique of lithium ion battery according to one of claim 1-2, which is characterized in that the step
Suddenly（4）In n=3 ~ 10, preferably n=6-8.
5. a kind of pressurized liquid injection technique of lithium ion battery according to one of claim 1-2, which is characterized in that the step
Suddenly（5）In m=1 ~ 5, preferably m=1-3.
6. a kind of pressurized liquid injection technique of lithium ion battery according to one of claim 1-2, which is characterized in that the step
Suddenly（1）Need to detect battery vacuum-pumping the air-tightness of battery before.
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| CN201810035476.7A CN108390009A (en) | 2018-01-15 | 2018-01-15 | A kind of pressurized liquid injection technique of lithium ion battery |
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| CN201810035476.7A CN108390009A (en) | 2018-01-15 | 2018-01-15 | A kind of pressurized liquid injection technique of lithium ion battery |
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| CN108390009A true CN108390009A (en) | 2018-08-10 |
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| CN201810035476.7A Pending CN108390009A (en) | 2018-01-15 | 2018-01-15 | A kind of pressurized liquid injection technique of lithium ion battery |
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| CN109786841A (en) * | 2018-12-13 | 2019-05-21 | 中国科学院电工研究所 | A kind of preparation method of lithium ion electrochemical energy storage device |
| CN110416445A (en) * | 2019-07-23 | 2019-11-05 | 湖北锂诺新能源科技有限公司 | Diplopore lithium ion cover board and its rocking chair type priming device and method |
| CN110896155A (en) * | 2018-09-13 | 2020-03-20 | 深圳格林德能源有限公司 | Process for improving electrolyte infiltration of lithium ion battery |
| CN110993881A (en) * | 2019-12-23 | 2020-04-10 | 天能电池(芜湖)有限公司 | Efficient acid adding process |
| CN111883821A (en) * | 2020-08-02 | 2020-11-03 | 江西安驰新能源科技有限公司 | Square lithium ion battery and liquid injection process thereof |
| CN114824692A (en) * | 2022-05-31 | 2022-07-29 | 重庆宏辰科扬能源有限责任公司 | Liquid injection process of cylindrical nickel-metal hydride battery and application thereof |
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Application publication date: 20180810 |