CN109755657A - The electrolyte filling method of column lithium ion battery - Google Patents
The electrolyte filling method of column lithium ion battery Download PDFInfo
- Publication number
- CN109755657A CN109755657A CN201910065273.7A CN201910065273A CN109755657A CN 109755657 A CN109755657 A CN 109755657A CN 201910065273 A CN201910065273 A CN 201910065273A CN 109755657 A CN109755657 A CN 109755657A
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- Prior art keywords
- lithium ion
- ion battery
- column lithium
- unsealed
- electrolyte
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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
Abstract
The invention belongs to technical field of lithium ion more particularly to a kind of electrolyte filling methods of column lithium ion battery.The electrolyte filling method of the column lithium ion battery, nut cap is placed on steel shell, forms unsealed column lithium ion battery, and unsealed column lithium ion battery is put into closed utensil and is pre-charged.Since in pre-charge process, column lithium ion battery is not sealed, therefore electrolyte can be supplemented after precharging, the technical problem for avoiding battery cycle life caused by reducing due to electrolyte short.In addition, can make the electrolyte weight inside different column lithium ion batteries consistent by secondary fluid injection since the electrolyte that different column lithium ion batteries consumes in formation process is also different, to improve the consistency of column lithium ion battery.
Description
Technical field
The invention belongs to technical field of lithium ion more particularly to a kind of electrolyte filling methods of column lithium ion battery.
Background technique
Lithium ion battery has the advantages that high voltage, height ratio capacity and high-specific-power, has become important new energy, quilt
It is widely used on electronic product.
Existing column type Li-ion cell filling method, including fluid injection, sealing and chemical conversion and etc..Due to cylindrical lithium
The reservoir quantity of ion battery is limited, and the chemical conversion step after sealing can consume electrolyte, therefore, lead to existing cylindrical lithium
Ion battery cycle life is short, and it is dry to even result in column lithium ion battery electrolyte inside.
Summary of the invention
The technical problems to be solved by the present invention are: for caused by the electrolyte filling method of existing column lithium ion battery
The short technological deficiency of battery cycle life, provides a kind of electrolyte filling method of column lithium ion battery.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of electrolyte filling method of column lithium ion battery, mention
For cylindrical lithium electronic cell, the cylindrical lithium electronic cell includes steel shell and the nut cap set on described steel shell one end；
The electrolyte of the first predetermined amount is injected into the steel shell；
The nut cap is placed on the steel shell, to form unsealed column lithium ion battery, is not sealed described
The column lithium ion battery of mouth is put into closed utensil；
The unsealed column lithium ion battery is pre-charged；
The electrolyte of the second predetermined amount is injected into the steel shell, so that the electrolyte total amount in the steel shell reaches default
Electrolyte total amount；
By the cap sealed on the steel shell.
Optionally, first predetermined amount is the 50%~100% of the default electrolyte total amount.
Optionally, it the described the step of unsealed column lithium ion battery is pre-charged, specifically includes:
It is once charged to the unsealed column lithium ion battery；
Recharging is carried out to the unsealed column lithium ion battery；And
It is charged three times to the unsealed column lithium ion battery.
Optionally, in described the step of once being charged to the unsealed column lithium ion battery, charging electricity
Stream is 0.05C, time 1h；
In described the step of carrying out recharging to the unsealed column lithium ion battery, charging current is
0.1C, time 1h；
In described the step of being charged three times to the unsealed column lithium ion battery, charging current is
0.2C, until voltage reaches 4.05V.
Optionally, described to include: by step of the cap sealed on the steel shell
Successively the unsealed column lithium ion battery is carried out an envelope, two envelopes and squatted to seal.
Optionally, electrolyte is injected into the steel shell using vacuum automatic injecting device.
Optionally, described that the nut cap is placed on the steel shell, to form unsealed column lithium ion battery,
The unsealed column lithium ion battery is put into the step in closed utensil, with described to the unsealed cylinder
Between the step of lithium ion battery is pre-charged further include:
It stands.
Optionally, the electrolyte that the second predetermined amount is injected into the steel shell, so that the electrolyte in the steel shell
Total amount reached between the step of default electrolyte total amount further include:
It weighs to the unsealed column lithium ion battery, second predetermined amount is calculated.
Optionally, the closed utensil includes insulating cylinder, sealing element and conduct piece, is formed in the insulating cylinder for holding
The accommodating chamber of the unsealed column lithium ion battery is set, the first end being oppositely arranged and are formed on the insulating cylinder
Two ends are formed with first through hole in the first end, the second through-hole, the first through hole and second are formed in the second end
Through-hole is connected to the accommodating chamber, and the conduct piece sealing is arranged in the first through hole, one end position of the conduct piece
In outside the accommodating chamber and for connecting with formation cabinet, the other end of the conduct piece is located in the accommodating chamber and is used for and institute
Unsealed column lithium ion battery is stated to abut；
The sealing element is sealingly disposed between the insulating cylinder and the column lithium ion battery, so that described do not seal
Closed environment is formed between the column lithium ion battery of mouth and the inner wall of the accommodating chamber, is formed with third on the sealing element
Through-hole, second through-hole and the accommodating chamber are connected to the third through-hole, to expose the unsealed cylindrical lithium
Ion battery.
Optionally, connecting hole is formed in the first end, the connecting hole is filled for being connected to the accommodating chamber and dehumidifier
It sets.
Implement the embodiment of the present invention, will have the following beneficial effects:
The electrolyte filling method of column lithium ion battery provided by the above embodiment, nut cap is placed on steel shell, is formed not
Unsealed column lithium ion battery is put into closed utensil and is pre-charged by the column lithium ion battery of sealing.By
In pre-charge process, column lithium ion battery is not sealed, therefore can be supplemented after precharging electrolyte,
The short technical problem of battery cycle life caused by avoiding electrolyte from reducing.Since different column lithium ion batteries is in preliminary filling
The electrolyte consumed in electric process is also different, and the fluid injection after being pre-charged can make inside different column lithium ion batteries
Electrolyte weight is consistent, to improve the consistency of column lithium ion battery.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart of the electrolyte filling method of column lithium ion battery provided in an embodiment of the present invention；
Fig. 2 is the stereoscopic schematic diagram of closed utensil provided in an embodiment of the present invention；
Fig. 3 is the stereoscopic schematic diagram at another visual angle of closed utensil shown in Fig. 2；
Fig. 4 is the decomposition diagram of closed utensil shown in Fig. 2；
Fig. 5 is the decomposition diagram at another visual angle of closed utensil shown in Fig. 2；
Fig. 6 is the cross-sectional view of closed utensil shown in Fig. 2.
Appended drawing reference in specification is as follows:
1, insulating cylinder；11, accommodating chamber；12, first end；121, first through hole；122, connecting hole；13, second end；131,
Two through-holes；14, insulating cylinder body；141, open end；142, closed end；15, insulate cover；151, the first lid；152, the second lid
Body；
2, sealing element；21, third through-hole；22, the first sealing；23, the second sealing；
3, conduct piece；
4, unsealed column lithium ion battery.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the present invention provides a kind of electrolyte filling method of column lithium ion battery, comprising:
Step S1: providing cylindrical lithium electronic cell, and cylindrical lithium electronic cell includes steel shell and set on steel shell one end
Nut cap.
Step S2: the electrolyte of the first predetermined amount is injected into steel shell.
Step S3: nut cap is placed on steel shell, to form unsealed column lithium ion battery, by unsealed circle
Cylindricality lithium ion battery is put into closed utensil.
Step S4: it stands.
Step S5: unsealed column lithium ion battery is pre-charged.
Step S6: injecting the electrolyte of the second predetermined amount into steel shell, so that the electrolyte total amount in steel shell reaches default
Electrolyte total amount.
Step S7: by cap sealed on steel shell.
Specifically, in step S2, electrolyte is injected into steel shell using vacuum electrolyte filling device, the first predetermined amount is default electricity
Solve the 50%~100% of liquid total amount.Preferably, the first predetermined amount is the 70%~80% of default electrolyte total amount, that is, completes one
Secondary fluid injection.
In other embodiments, as long as the first predetermined amount can satisfy nature volatilization and be pre-charged consumed electrolyte
Amount.
In step S3, as shown in Figures 2 to 6, closed utensil includes insulating cylinder 1, sealing element 2, conduct piece 3, dehumidifier apparatus
And vacuum plant, the accommodating chamber 11 for accommodating unsealed column lithium ion battery 4, insulating cylinder 1 are formed in insulating cylinder 1
On be formed with the first end 12 and second end 13 being oppositely arranged, be formed with first through hole 121, shape in second end 13 in first end 12
At there is the second through-hole 131, first through hole 121 and the second through-hole 131 are connected to accommodating chamber 11, and the sealing of conduct piece 3 is arranged in the
In one through-hole 121, one end of conduct piece 3 is located at outside accommodating chamber 11 and for connecting with formation cabinet, and the other end of conduct piece 3 is located at
In accommodating chamber 11 and for being abutted with column lithium ion battery 4.
Sealing element 2 is sealingly disposed between insulating cylinder 1 and unsealed column lithium ion battery 4, so that unsealed
Closed environment is formed between column lithium ion battery 4 and the inner wall of accommodating chamber 11, sealing element 2 is provided with third through-hole 21, the
Two through-holes 131 and accommodating chamber 11 are connected to third through-hole 21, to expose unsealed column lithium ion battery 4.
Specifically, insulating cylinder 1 includes insulating cylinder body 14 and insulation cover 15, is formed with accommodating chamber 11 in insulating cylinder body 14,
Insulating cylinder body 14 has the open end 141 and closed end 142 that are oppositely arranged, and closed end 142 is first end 12, insulation cover 15 with
Insulating cylinder body 14 is detachably connected, in order to be put into column lithium ion battery 4.
Insulation cover 15 is connected to open end 141 to form second end 13, and the second through-hole 131 is formed in insulation cover 15
On, sealing element 2 includes the first sealing 22 and the second sealing 23, and the first sealing 22 is arranged along the axial direction of insulating cylinder body 14,
Second sealing 23 is connect with the first sealing 22, and insulation cover 15 includes the first lid 151 and the second lid 152, the first lid
Body 151 is arranged along the axial direction of insulating cylinder body 14, and the second lid 152 is connect with the first lid 151,22 sealed set of the first sealing
Between unsealed column lithium ion battery 4 and insulating cylinder body 14, the first lid 151 is set in insulating cylinder body 14.The
Two sealings 23 are sealingly disposed between column lithium ion battery 4 and the second lid 152 so that unsealed cylindrical lithium from
Form closed environment between sub- battery 4 and the inner wall of accommodating chamber 11, thus avoid the gas generated in formation process by battery with
Gap outflow between insulation shell.
In the present embodiment, first end 12 is circle, the shape and first of the shape of the second sealing 23 and the first lid 151
12 matching of end.
Specific in the present embodiment, after unsealed column lithium ion battery is put into accommodating chamber 11, conduct piece 3 is located at
One end in accommodating chamber 11 is abutted with the anode of unsealed column lithium ion battery 4, and conduct piece 3 is located at outside accommodating chamber 11
The anode of one end and formation cabinet connects.The unsealed column lithium ion electric exposed by the second through-hole 131 and third through-hole 21
The cathode in pond 4 and the cathode of formation cabinet connect.
However, in other embodiments, it is also possible that conduct piece 3 is located at one end and unsealed circle in accommodating chamber 11
The cathode of cylindricality lithium ion battery 4 abuts, and conduct piece 3 is located at the cathode connection of one end and formation cabinet outside accommodating chamber 11.By
The anode for the unsealed column lithium ion battery 4 that two through-holes 131 and third through-hole 21 expose is connect with the anode of formation cabinet.
It is provided with the connecting hole 122 being connected to accommodating chamber 11, connecting hole 122 and vacuum plant in first end 12 and dehumidifier fills
Connection is set, so that vacuum plant and dehumidifier apparatus are connected to accommodating chamber 11.
In step S4, the time of standing, the temperature in accommodating chamber was 40~50 DEG C for 24 hours, to accommodate using dehumidifier apparatus
Intracavitary moisture content is 20PPM.It in this way can be while avoiding electrolyte from absorbing water, additionally it is possible to enable electrolyte more preferable
Ground is contacted with steel shell.
However, in other embodiments, step S4 can also be omitted.
In step S5, start vacuum plant, so that the pressure in accommodating chamber 11 is in -0.05MPa~-0.085Mpa, it is right
The step of unsealed column lithium ion battery is pre-charged carries out under negative pressure, to be conducive to gas in accommodating chamber 11
Discharge, gas has been effectively relieved and has accumulated bring security risk in accommodating chamber 11, has improved the height of column lithium ion battery
Warm storge quality and cycle performance provide guarantee to be easy to produce application of the high-nickel material of gas on lithium ion battery.
It is proved through experimental study, when the pressure in accommodating chamber 11 is lower than -0.05MPa, is unfavorable for the discharge of gas, works as appearance
When the pressure received in chamber 11 is higher than -0.085Mpa, it will the volatilization for increasing electrolyte increases the consumption of electrolyte, increase at
This.
Unsealed column lithium ion battery as referred to herein refers to: nut cap is placed on steel shell and nut cap and steel shell
Column lithium ion battery when unsealing.
Step S5 is specifically included: under conditions of pressure is in -0.05MPa~-0.085, using the charging current of 0.05C
It is once charged to unsealed column lithium ion battery 4, time 1h, then using the charging current of 0.1C to not sealing
The column lithium ion battery 4 of mouth carries out recharging, time 1h, then uses the charging current of 0.2C to unsealed cylinder
Shape lithium ion battery 4 is charged three times, until voltage reaches 4.05V.That is, completing to unsealed column lithium ion battery 4
Open formation.
Chemical conversion in the present embodiment is pre-charged using low current, so as to occur in unsealed lithium ion battery 4 single
Electron reaction, so as to keep the SEI film to be formed finer and close.
In the case where dew point is -55 DEG C of environmental condition, unsealed lithium ion battery 4 is taken out from closed utensil, is avoided
The influence that battery performance caused by electrolyte absorbs water generates.
However, in other embodiments, can be filled according to the needs of different column lithium ion batteries to precharge
The adjustment in electric current and charging time.
In step S6, by weighing to unsealed column lithium ion battery, the second predetermined amount is calculated, to
The electrolyte of the second predetermined amount of injection in steel shell.That is, completing the secondary fluid injection to unsealed column lithium ion battery.Wherein
Second predetermined amount is that the weight of preset column lithium ion battery subtracts the unsealed column lithium ion electric learnt in S6
The weight in pond.Then electrolyte is injected into steel shell using vacuum electrolyte filling device again, it is easier to inject electrolyte, can shorten
The time of fluid injection improves production efficiency.
Due to electrolyte stand and be pre-charged in closed utensil all can volatile fraction electrolyte, and in pre-charge process
Partial electrolyte liquid can be consumed, therefore secondary fluid injection can supplement electrolyte, battery caused by avoiding electrolyte from reducing follows
Ring service life short technical problem.In addition, the electrolyte consumed in formation process due to different column lithium ion batteries is not
Together, the electrolyte weight inside different column lithium ion batteries can be made consistent by secondary fluid injection, to improve cylinder
The consistency of shape lithium ion battery.
Step S7, which is specifically included, carries out an envelope, two envelopes to unsealed battery and envelope of squatting, by cap sealed on steel shell.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (10)
1. a kind of electrolyte filling method of cylindrical lithium electronic cell, which comprises the steps of:
Cylindrical lithium electronic cell is provided, the cylindrical lithium electronic cell includes steel shell and the lid set on described steel shell one end
Cap；
The electrolyte of the first predetermined amount is injected into the steel shell；
The nut cap is placed on the steel shell, it, will be described unsealed to form unsealed column lithium ion battery
Column lithium ion battery is put into closed utensil；
The unsealed column lithium ion battery is pre-charged；
The electrolyte of the second predetermined amount is injected into the steel shell, so that the electrolyte total amount in the steel shell reaches default electrolysis
Liquid total amount；
By the cap sealed on the steel shell.
2. the electrolyte filling method of column lithium ion battery according to claim 1, which is characterized in that first predetermined amount
It is the 50%~100% of the default electrolyte total amount.
3. the electrolyte filling method of column lithium ion battery according to claim 1, which is characterized in that described not sealed to described
The step of column lithium ion battery of mouth is pre-charged, specifically includes:
It is once charged to the unsealed column lithium ion battery；
Recharging is carried out to the unsealed column lithium ion battery；And
It is charged three times to the unsealed column lithium ion battery.
4. the electrolyte filling method of column lithium ion battery according to claim 3, it is characterised in that:
In described the step of once being charged to the unsealed column lithium ion battery, charging current 0.05C, when
Between be 1h；
In described the step of carrying out recharging to the unsealed column lithium ion battery, charging current 0.1C, when
Between be 1h；
In described the step of being charged three times to the unsealed column lithium ion battery, charging current 0.2C, until
Voltage reaches 4.05V.
5. the electrolyte filling method of column lithium ion battery according to claim 1, which is characterized in that described by the nut cap
The step being sealed on the steel shell includes:
Successively the unsealed column lithium ion battery is carried out an envelope, two envelopes and squatted to seal.
6. the electrolyte filling method of column lithium ion battery according to claim 1, which is characterized in that infused automatically using vacuum
Liquid device injects electrolyte into the steel shell.
7. the electrolyte filling method of column lithium ion battery according to claim 1, which is characterized in that described by the nut cap
It is placed on the steel shell, to form unsealed column lithium ion battery, by the unsealed column lithium ion electric
Pond is put into the step in closed utensil, with the described the step of unsealed column lithium ion battery is pre-charged it
Between further include:
It stands.
8. the electrolyte filling method of column lithium ion battery according to claim 1, which is characterized in that described to the steel shell
It is interior injection the second predetermined amount electrolyte so that the step of electrolyte total amount in the steel shell reaches default electrolyte total amount it
Between further include:
It weighs to the unsealed column lithium ion battery, second predetermined amount is calculated.
9. the electrolyte filling method of column lithium ion battery according to claim 1, which is characterized in that the closed utensil packet
Insulating cylinder, sealing element and conduct piece are included, is formed in the insulating cylinder for accommodating the unsealed column lithium ion electric
The accommodating chamber in pond is formed with the first end and second end being oppositely arranged on the insulating cylinder, is formed with first in the first end
Through-hole is formed with the second through-hole in the second end, and the first through hole and the second through-hole are connected to the accommodating chamber, described
Conduct piece sealing is arranged in the first through hole, and one end of the conduct piece is located at the accommodating chamber outside and is used for and formation cabinet
Connection, the other end of the conduct piece are located in the accommodating chamber and for supporting with the unsealed column lithium ion battery
It connects；
The sealing element is sealingly disposed between the insulating cylinder and the column lithium ion battery, so that described unsealed
Closed environment is formed between column lithium ion battery and the inner wall of the accommodating chamber, and it is logical that third is formed on the sealing element
Hole, second through-hole and the accommodating chamber are connected to the third through-hole, with expose the unsealed cylindrical lithium from
Sub- battery.
10. the electrolyte filling method of column lithium ion battery according to claim 9, which is characterized in that in the first end
It is formed with connecting hole, the connecting hole is for being connected to the accommodating chamber and dehumidifier apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910065273.7A CN109755657B (en) | 2019-01-23 | 2019-01-23 | Liquid injection method of cylindrical lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910065273.7A CN109755657B (en) | 2019-01-23 | 2019-01-23 | Liquid injection method of cylindrical lithium ion battery |
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| CN109755657A true CN109755657A (en) | 2019-05-14 |
| CN109755657B CN109755657B (en) | 2020-11-20 |
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ID=66406166
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| CN109755657B (en) | 2020-11-20 |
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