CN107464911A - A kind of lithium ion battery heated at constant temperature priming device and its method - Google Patents
A kind of lithium ion battery heated at constant temperature priming device and its method Download PDFInfo
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- CN107464911A CN107464911A CN201610395786.0A CN201610395786A CN107464911A CN 107464911 A CN107464911 A CN 107464911A CN 201610395786 A CN201610395786 A CN 201610395786A CN 107464911 A CN107464911 A CN 107464911A
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- electrolyte
- constant temperature
- valve
- heating tank
- lithium ion
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 70
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000037452 priming Effects 0.000 title claims abstract description 29
- 239000003792 electrolyte Substances 0.000 claims abstract description 361
- 239000012530 fluid Substances 0.000 claims abstract description 164
- 238000010438 heat treatment Methods 0.000 claims abstract description 152
- 239000007788 liquid Substances 0.000 claims abstract description 114
- 238000002347 injection Methods 0.000 claims abstract description 104
- 239000007924 injection Substances 0.000 claims abstract description 104
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 97
- 238000013461 design Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000009736 wetting Methods 0.000 abstract description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a kind of lithium ion battery heated at constant temperature priming device, and it includes the first electrolyte heating tank, the second electrolyte heating tank, electrolyte constant temperature buffer tank, liquid injection system and lithium battery positioning fixture；First electrolyte heating tank one end is connected with the first liquid flowing valve, and the inlet that the other end is cached on pot sidewall by the first electrolysis fluid valve and electrolyte constant temperature electrolyte constant temperature that is connected caches pot bottom and is electrolysed fluid valve by the 3rd and is connected with liquid injection system；Invention additionally discloses a kind of lithium ion battery heated at constant temperature electrolyte filling method.The precision of fluid injection and the stability of reservoir quantity can be lifted by carrying out lithium battery fluid injection using the present invention, and reservoir quantity is not influenceed by ambient temperature, so that fluid injection process capability is lifted, improve production efficiency and the utilization rate of material；Meanwhile after heating electrolyte, the viscosity of electrolyte can be reduced, the mobility and wetting property of electrolyte is improved, improves fluid injection efficiency, improve the wetting property of electrolyte.
Description
Technical field
The present invention relates to lithium ion battery processing and manufacturing technology, is filled more particularly, to a kind of lithium ion battery heated at constant temperature fluid injection
Put and its method.
Background technology
In the prior art, soft package lithium ion power battery liquid injection process is completed at room temperature, and it is disadvantageous in that：Room
In the case of temperature, temperature change is big, and minimum temperature is 20 DEG C, and maximum temperature is 30 DEG C, even more high；In larger temperature change
In section, electrolyte volume can be varied with temperature and changed, i.e., density of electrolyte can produce larger fluctuating change with temperature；For
Convenient metering, filling machine of the prior art replace weighing by the way of volume metering, therefore in actual injection process, because
The fluctuation of lithium-ion battery electrolytes density caused by temperature change, the huge fluctuation of lithium ion battery liquid injection amount liquid can be caused,
In this case the yields of fluid injection process reduces, while also reduces the production efficiency of lithium ion battery.
Chinese patent publication No. CN101882674A, date of publication are on November 10th, 2010, which disclose a kind of lithium from
Sub- battery liquid-filling device and its technique, disclosure of the invention lithium-ion battery liquid injection device, it includes vacuum (-tight) housing, base, vacuum
Cover is provided with vacuum tube and normal pressure siphunculus, connected on vacuum tube together with being tightly disposed between base by dense block on vacuum (-tight) housing
Vacuum meter is connected to, the first magnetic valve is additionally provided between vacuum meter and vacuum tube, normal pressure siphunculus is provided with the second battery valve, vacuum
High-voltage tube is additionally provided with cover, pressure gauge, second solenoid valve are set gradually on high-voltage tube, while also disclose lithium ion cell injection
Liquid technique, the lithium ion battery for being put into electrolyte is placed in vacuum (-tight) housing, is evacuated down to 0.06 MPa, kept for 10 seconds, it is extensive
Normal atmosphere (An) is arrived again, 0.4 MPa of chlorine is injected into vacuum (-tight) housing, and is kept for 1 minute, returns to normal atmosphere (An), then
0.02 MPa, after returning to normal pressure is evacuated down to, reason battery is taken out；It can be seen that the invention is mainly from atmosphere during fluid injection and very
Prior art is improved in terms of reciprocal of duty cycle and accelerates battery Electolyte-absorptive, improves fluid injection efficiency, but do not control lithium ion
Reservoir quantity in battery, possibility be present because temperature change, density of electrolyte change, inject electrolyte in lithium ion battery
The problem of larger difference, reduction yields be present in quality.
The content of the invention
It can be for a long time used continuously to solve the above problems, the invention provides one kind, and reservoir quantity deviation can be avoided
Lithium ion battery heated at constant temperature priming device；
Meanwhile present invention also offers a kind of lithium ion battery that can be realized high-precision fluid injection and can improve electrolyte wetting property
Heated at constant temperature electrolyte filling method.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of lithium ion battery heated at constant temperature priming device, including shell, the first electrolyte heating tank, the second electrolyte heating tank,
Electrolyte constant temperature buffer tank, liquid injection system and lithium ion battery positioning fixture；First electrolyte heating tank one end and the first liquid feed valve
Door is connected, and the other end caches the inlet on pot sidewall with electrolyte constant temperature by the first electrolysis fluid valve and is connected；Second electricity
Solution liquid heating tank one end is connected with the second liquid flowing valve, and the other end passes through the second electrolysis fluid valve and electrolyte constant temperature buffer tank side
Inlet on wall is connected；Electrolyte constant temperature caches pot bottom and is connected by the 3rd electrolysis fluid valve with liquid injection system；Lithium from
Sub- battery positioning clamp does not contact below liquid injection system with liquid injection system.
Preferably, the bottom of the first inlet and the second inlet on electrolyte constant temperature caching pot sidewall is higher than electrolyte constant temperature
2~3cm of buffer tank tank bottom.
This lithium ion battery heated at constant temperature priming device can use two electrolyte to heat using the design of double electrolyte heating tanks
Tank heat electrolyte in turn and inject electrolyte constant temperature buffer tank method realize electrolyte heating, the continuous operation of fluid injection, improve
The fluid injection efficiency of lithium ion battery, improve production efficiency；Lithium ion battery positioning fixture below liquid injection system, to solid
Determine the lithium ion battery in fluid injection operation, injection process is more smoothed out reliably.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 20~30 DEG C, and closes first
Liquid flowing valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 5~10 minutes, electrolyte temperature are 30~40 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 30~40 DEG C to keep electrolyte temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, the second liquid flowing valve of closing, heating electrolyte to 30~
40 DEG C, keep constant temperature.
In injection process, the first electrolyte heating tank and the second electrolyte heating tank are in turn to be continuous in electrolyte constant temperature buffer tank
There is provided it is heated after electrolyte, it is ensured that lithium ion battery continuous fluid injection work, improve the efficiency of injection process；Heating is permanent
On the one hand warm fluid injection reduces the viscosity of electrolyte, improve the mobility of electrolyte, on the other hand, avoid the density because of electrolyte
It is excessive change and cause the deviation of fluid injection weight；The qualification rate of fluid injection process is improved, while improves production efficiency and electrolyte
Utilization rate.
Preferably, after the completion of step 3, the first liquid flowing valve is opened, injects electrolyte into the first electrolyte heating tank, it is complete
Into the first liquid flowing valve of rear closing, heating electrolyte keeps constant temperature to 30~40 DEG C.
Electrolyte filling method of the present invention is carried out at a constant temperature, and reservoir quantity is not influenceed by ambient temperature, so that fluid injection process capability
Lifting, production efficiency and the utilization rate of material are improved, on the other hand, after heating electrolyte, the viscosity of electrolyte can be reduced,
The mobility and wetting property of electrolyte are improved, improves fluid injection efficiency, while improve the wetting property of electrolyte.
Preferably, the volume of electrolyte is no more than electrolyte heating tank in the first electrolyte heating tank and the second electrolyte heating tank
The 2/3 of volume.
The electrolyte volume in electrolyte heating tank is kept to be prevented heated no more than the 2/3 of electrolyte heating tank volume
Cheng Zhong, because density of electrolyte changes, spilling caused by volume change greatly.
Preferably, heating filling liquid by first the first electrolyte, rear second electrolyte heats filling liquid, then the first electrolyte adds
The continuous fluid injection into electrolyte constant temperature buffer tank of the circulation fluid injection mode of hot filling liquid.
Therefore, the invention has the advantages that：
(1) fluid injection precision is improved；
(2) stability of fluid injection process is improved, improves production efficiency；
(3) wetting property of electrolyte is improved.
Brief description of the drawings
Fig. 1 is a kind of internal structure schematic diagram of lithium ion battery heated at constant temperature priming device in the present invention；
In figure：1st, the first liquid flowing valve, the 2, first electrolyte heating tank, the 3, first electrolysis fluid valve, the 4, second electrolyte
Heating tank, the 5, second liquid flowing valve, the 6, second electrolysis fluid valve, 7, electrolyte constant temperature buffer tank, the 8, the 3rd electrolyte valve
Door, 9, liquid injection system, 10, lithium ion battery, 11, lithium ion battery positioning fixture.
Embodiment
Technical scheme is further described with reference to embodiment.
Embodiment 1
A kind of lithium ion battery heated at constant temperature priming device, including shell, the first electrolyte heating tank 2, the heating of the second electrolyte
Tank 4, electrolyte constant temperature buffer tank 7, liquid injection system 9 and lithium ion battery positioning fixture 11；First electrolyte heating tank one end
It is connected with the first liquid flowing valve 1, the other end caches the feed liquor on pot sidewall by the first electrolysis fluid valve 3 with electrolyte constant temperature
Mouth is connected；Second electrolyte heating tank one end is connected with the second liquid flowing valve 5, and the other end passes through the second electrolysis fluid valve 6
It is connected with the inlet on electrolyte constant temperature caching pot sidewall；Electrolyte constant temperature caches pot bottom and passes through the 3rd electrolysis fluid valve 8
It is connected with liquid injection system；Lithium ion battery positioning fixture does not contact below liquid injection system with liquid injection system.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 20 DEG C, and closes the first feed liquor
Valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 5 minutes, electrolyte temperature are 30 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 30 DEG C to keep electrolyte temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, close the second liquid flowing valve, heating electrolyte is extremely
30 DEG C, keep constant temperature.
Embodiment 2
Lithium ion battery heated at constant temperature priming device is the same as embodiment 1.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 25 DEG C, and closes the first feed liquor
Valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 7 minutes, electrolyte temperature are 35 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 35 DEG C to keep electrolyte temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, close the second liquid flowing valve, heating electrolyte is extremely
35 DEG C, keep constant temperature.
Embodiment 3
Lithium ion battery heated at constant temperature priming device is the same as embodiment 1.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 30 DEG C, and closes the first feed liquor
Valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 10 minutes, electrolyte temperature are 40 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 40 DEG C to keep electrolyte temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, close the second liquid flowing valve, heating electrolyte is extremely
40 DEG C, keep constant temperature.
Embodiment 4
A kind of lithium ion battery heated at constant temperature priming device, including shell, the first electrolyte heating tank 2, the heating of the second electrolyte
Tank 4, electrolyte constant temperature buffer tank 7, liquid injection system 9 and lithium ion battery positioning fixture 11；First electrolyte heating tank one end
It is connected with the first liquid flowing valve 1, the other end caches the feed liquor on pot sidewall by the first electrolysis fluid valve 3 with electrolyte constant temperature
Mouth is connected；Second electrolyte heating tank one end is connected with the second liquid flowing valve 5, and the other end passes through the second electrolysis fluid valve 6
It is connected with the inlet on electrolyte constant temperature caching pot sidewall；Electrolyte constant temperature caches pot bottom and passes through the 3rd electrolysis fluid valve 8
It is connected with liquid injection system；Lithium ion battery positioning fixture does not contact below liquid injection system with liquid injection system；Electrolyte is permanent
The bottom of the first inlet and the second inlet on temperature caching pot sidewall is higher than electrolyte constant temperature buffer tank tank bottom 2cm.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 20 DEG C, and closes the first feed liquor
Valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 5 minutes, electrolyte temperature are 30 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 30 DEG C to keep electrolyte temperature；After the completion of, open first and enter
Fluid valve, inject electrolyte into the first electrolyte heating tank, after the completion of close the first liquid flowing valve, heating electrolyte to 30 DEG C,
And keep constant temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, close the second liquid flowing valve, heating electrolyte is extremely
30 DEG C, keep constant temperature.
Embodiment 5
Lithium ion battery heated at constant temperature priming device is the same as embodiment 4.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 25 DEG C, and closes the first feed liquor
Valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 8 minutes, electrolyte temperature are 35 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 35 DEG C to keep electrolyte temperature；After the completion of, open first and enter
Fluid valve, inject electrolyte into the first electrolyte heating tank, after the completion of close the first liquid flowing valve, heating electrolyte to 35 DEG C,
And keep constant temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, close the second liquid flowing valve, heating electrolyte is extremely
35 DEG C, keep constant temperature.
Embodiment 6
Lithium ion battery heated at constant temperature priming device is the same as embodiment 4.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 30 DEG C, and closes the first feed liquor
Valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 10 minutes, electrolyte temperature are 40 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 40 DEG C to keep electrolyte temperature；After the completion of, open first and enter
Fluid valve, inject electrolyte into the first electrolyte heating tank, after the completion of close the first liquid flowing valve, heating electrolyte to 40 DEG C,
And keep constant temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, close the second liquid flowing valve, heating electrolyte is extremely
40 DEG C, keep constant temperature.
Embodiment 7
A kind of lithium ion battery heated at constant temperature priming device, including shell, the first electrolyte heating tank 2, the heating of the second electrolyte
Tank 4, electrolyte constant temperature buffer tank 7, liquid injection system 9 and lithium ion battery positioning fixture 11；First electrolyte heating tank one end
It is connected with the first liquid flowing valve 1, the other end caches the feed liquor on pot sidewall by the first electrolysis fluid valve 3 with electrolyte constant temperature
Mouth is connected；Second electrolyte heating tank one end is connected with the second liquid flowing valve 5, and the other end passes through the second electrolysis fluid valve 6
It is connected with the inlet on electrolyte constant temperature caching pot sidewall；Electrolyte constant temperature caches pot bottom and passes through the 3rd electrolysis fluid valve 8
It is connected with liquid injection system；Lithium ion battery positioning fixture does not contact below liquid injection system with liquid injection system；Electrolyte is permanent
The bottom of the first inlet and the second inlet on temperature caching pot sidewall is higher than electrolyte constant temperature buffer tank tank bottom 3cm.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 20 DEG C, and closes the first feed liquor
Valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 5 minutes, electrolyte temperature are 30 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 30 DEG C to keep electrolyte temperature；After the completion of, open first and enter
Fluid valve, inject electrolyte into the first electrolyte heating tank, after the completion of close the first liquid flowing valve, heating electrolyte to 30 DEG C,
And keep constant temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, close the second liquid flowing valve, heating electrolyte is extremely
30 DEG C, keep constant temperature；The volume of electrolyte heats no more than electrolyte in first electrolyte heating tank and the second electrolyte heating tank
The 2/3 of tank volume.
Embodiment 8
Lithium ion battery heated at constant temperature priming device is the same as embodiment 7.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 25 DEG C, and closes the first feed liquor
Valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 8 minutes, electrolyte temperature are 35 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 35 DEG C to keep electrolyte temperature；After the completion of, open first and enter
Fluid valve, inject electrolyte into the first electrolyte heating tank, after the completion of close the first liquid flowing valve, heating electrolyte to 35 DEG C,
And keep constant temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, close the second liquid flowing valve, heating electrolyte is extremely
35 DEG C, keep constant temperature；The volume of electrolyte heats no more than electrolyte in first electrolyte heating tank and the second electrolyte heating tank
The 2/3 of tank volume.
Embodiment 9
Lithium ion battery heated at constant temperature priming device is the same as embodiment 7.
A kind of lithium ion battery heated at constant temperature electrolyte filling method, comprises the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 30 DEG C, and closes the first feed liquor
Valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close first to enter
Fluid valve and the second liquid flowing valve, heating electrolyte 10 minutes, electrolyte temperature are 40 DEG C, keep constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte perseverance from the first electrolyte heating tank
Warm buffer tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 40 DEG C to keep electrolyte temperature；After the completion of, open first and enter
Fluid valve, inject electrolyte into the first electrolyte heating tank, after the completion of close the first liquid flowing valve, heating electrolyte to 40 DEG C,
And keep constant temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system,
Complete fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolyte valve is opened
Door, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, the second electrolysis fluid valve is turned off, beats
Open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, close the second liquid flowing valve, heating electrolyte is extremely
40 DEG C, keep constant temperature；The volume of electrolyte heats no more than electrolyte in first electrolyte heating tank and the second electrolyte heating tank
The 2/3 of tank volume.
Effect test：Compare the deviation of reservoir quantity in the electrolyte filling method in prior art and the present invention, using electrolyte filling method of the present invention
Experiment carried out at 37 DEG C of constant temperature, control group is to be entered using the experiment of prior art fluid injection under 20~30 DEG C of room temperature changing environments
OK.
Table 1 is using the reservoir quantity deviation data obtained by electrolyte filling method of the present invention：
Table 2 is using the reservoir quantity deviation data obtained by existing electrolyte filling method：
As can be seen from the above table, under identical fluid injection parameter, because control group is in the carry out fluid injection at room temperature of change, temperature is worked as
During change, electrolyte volume has greatly changed, and electrolyte volume expands with the rise of temperature, during control group fluid injection
Room temperature 20 DEG C with 30 DEG C when fluctuate, reservoir quantity extreme difference reaches 5.19g because of caused by electrolyte Volume Changes, far beyond
Design will；And electrolyte filling method in the present invention is used, under 37 DEG C of constant temperature, reservoir quantity extreme difference is 0.49g, according to fluid injection of the present invention
Fluid injection precision is greatly improved, while under heating, electrolysis fluid viscosity reduces, and the mobility of electrolyte is improved, so as to improve
Production efficiency；Be advantageous to the wettability of electrolyte under other high temperature, accelerate follow-up wetting efficiency.
Claims (5)
1. a kind of lithium ion battery heated at constant temperature priming device, including shell, it is characterised in that：Also include the first electrolyte heating tank（2）, the second electrolyte heating tank（4）, electrolyte constant temperature buffer tank（7）, liquid injection system（9）With lithium ion battery positioning fixture（11）；First electrolyte heating tank one end and the first liquid flowing valve（1）It is connected, the other end passes through the first electrolysis fluid valve（3）It is connected with the inlet on electrolyte constant temperature caching pot sidewall；Second electrolyte heating tank one end and the second liquid flowing valve（5）It is connected, the other end passes through the second electrolysis fluid valve（6）It is connected with the inlet on electrolyte constant temperature caching pot sidewall；Electrolyte constant temperature caches pot bottom and passes through the 3rd electrolysis fluid valve（8）It is connected with liquid injection system；Lithium ion battery positioning fixture does not contact below liquid injection system with liquid injection system.
A kind of 2. lithium ion battery heated at constant temperature priming device according to claim 1, it is characterised in that：The bottom of the first inlet and the second inlet on the electrolyte constant temperature caching pot sidewall is higher than 2~3cm of electrolyte constant temperature buffer tank tank bottom.
3. a kind of lithium ion battery heated at constant temperature electrolyte filling method according to claim 1 or 2, it is characterised in that comprise the following steps：
First, dehumidified before fluid injection, the dew-point temperature in priming device is less than -40 DEG C, temperature is 20~30 DEG C, and closes the first liquid flowing valve, the second liquid flowing valve, the first electrolysis fluid valve, the second electrolysis fluid valve and the 3rd electrolysis fluid valve；
2nd, open, inject electrolyte into the first electrolyte heating tank and the second electrolyte heating tank, after the completion of close the first liquid flowing valve and the second liquid flowing valve, heating electrolyte 5~10 minutes, electrolyte temperature is 30~40 DEG C, keeps constant temperature；
3rd, the first electrolysis fluid valve is opened, the electrolyte after heating is delivered to electrolyte constant temperature buffer tank from the first electrolyte heating tank, the first electrolysis fluid valve is closed after the completion of conveying, it is 30~40 DEG C to keep electrolyte temperature；
4th, the 3rd electrolysis fluid valve is opened, electrolyte is injected into lithium ion battery according to design reservoir quantity by liquid injection system, completes fluid injection；
Wherein, in injection process, when electrolyte constant temperature caching tank level is reduced to inlet position, the second electrolysis fluid valve is opened, electrolyte is delivered in electrolyte constant temperature buffer tank from the second electrolyte heating tank, turns off the second electrolysis fluid valve, open the second liquid flowing valve electrolyte is delivered in the second electrolyte heating tank, the second liquid flowing valve is closed, heating electrolyte keeps constant temperature to 30~40 DEG C.
A kind of 4. lithium ion battery heated at constant temperature electrolyte filling method according to claim 3, it is characterised in that：After the completion of the step 3, open the first liquid flowing valve, inject electrolyte into the first electrolyte heating tank, after the completion of close the first liquid flowing valve, heating electrolyte keeps constant temperature to 30~40 DEG C.
A kind of 5. lithium ion battery heated at constant temperature electrolyte filling method according to claim 3, it is characterised in that：The volume of electrolyte is no more than the 2/3 of electrolyte heating tank volume in the first electrolyte heating tank and the second electrolyte heating tank.
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