CN110165318A - A kind of method for pre-charging improving analysis lithium - Google Patents
A kind of method for pre-charging improving analysis lithium Download PDFInfo
- Publication number
- CN110165318A CN110165318A CN201910492099.4A CN201910492099A CN110165318A CN 110165318 A CN110165318 A CN 110165318A CN 201910492099 A CN201910492099 A CN 201910492099A CN 110165318 A CN110165318 A CN 110165318A
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- battery
- electric current
- plate
- charging
- charge
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
-
- 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 method for pre-charging for improving analysis lithium, method is divided into four steps, first step, it is charged the battery with low current, so that the battery core surface of the battery forms solid electrolyte interface film, second step, the voltage for continuing to charge to the battery to the battery reaches predetermined voltage range, the current value of the first step electric current is less than the current value of the second step electric current, third step, the voltage for continuing to charge to the battery to the battery reaches predetermined voltage range, the current value of the second step electric current is less than the current value of the third step electric current, reach charging cut-off current with the voltage of constant voltage charging method to the battery；This programme first passes through lesser current versus cell and carries out preliminary filling, so that forming solid electrolyte interface film in battery core, then has stepped through the biggish electric current of amplitude and charges, and the method can improve analysis lithium problem, improves the security performance and its service life of battery core.
Description
Technical field
The invention belongs to lithium ion battery charging fields, and in particular, to a kind of method for pre-charging for improving analysis lithium.
Background technique
With popularizing for all kinds of mobile terminals, lithium ion battery is excellent due to its energy density height, average output voltage height etc.
Point becomes mainstream powered products, and lithium ion battery needs the preliminary filling process by first time charging, many producers before factory
In order to adapt to increasingly hot power market, shortens the production cycle, production capacity is improved, when reducing the preliminary filling of lithium ion battery intentionally
Between, current widespread practice is to increase preliminary filling electric current, although this method can play the effect got instant result, but is also brought
Inevitable problem --- analysis lithium has lithium metal on anode battery core surface and is precipitated, this process is irreversible, and analysis lithium can drop
The security performance and its service life of low battery core.
Summary of the invention
The purpose of the present invention is to provide a kind of method for pre-charging for improving analysis lithium, can greatly improve analysis lithium problem, mention
The security performance and its service life of high battery core.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of method for pre-charging improving analysis lithium, comprising:
Step 1: the battery to preliminary filling is placed on loading plate, motor is controlled, keeps movable plate mobile to centre, until
Clamping plate clamps battery, after clamping battery, is charged with the first current versus cell, so that the battery core surface of the battery is formed admittedly
Body electrolyte interface film；
Step 2: reaching predetermined voltage range with the voltage that the second electric current continues to charge to the battery to the battery；
The current value of first electric current is less than the current value of second electric current；
Step 3: reaching predetermined voltage range with the voltage that third electric current continues to charge to the battery to the battery；
The current value of second electric current is less than the current value of the third step electric current；
Step 4: with constant-voltage charge to by electric current 0.02C.
Further, the step of being charged in step 1 with the first current versus cell specifically: with amplitude be 0.05C's
Current versus cell charges, charging time 30min, so that the voltage of the battery reaches 3.2V~3.3V.
Further, reach default in step 2 with the voltage that the second electric current continues to charge to the battery to the battery
The step of voltage range specifically: charge to the battery electricity of the battery for the electric current of 0.1C~0.2C with amplitude
Pressure reaches 3.5V~3.7V.
Further, reach default in step 3 with the voltage that third electric current continues to charge to the battery to the battery
The step of voltage range specifically: charge to the battery electricity of the battery for the electric current of 0.3C~0.5C with amplitude
Pressure reaches 4.0V~4.2V.
Further, the step of step 4 specifically: described in being charged to 4.0V~4.2V constant pressure to the battery
The electric current of battery reaches 0.02C electric current.
Further, the cell fixing device, including pedestal and the fixed mechanism being mounted on the base；
Pedestal includes support baseboard, and the center of support baseboard is movably installed with shaft, is fixed with worm gear on shaft；Branch
The upper surface of support bottom plate is fixed with two pieces of risers being oppositely arranged, and even block riser is connected by loading plate, the outer surface of riser
It is fixed with connecting rod；The top surface edge position of support baseboard is fixed with two pairs of first mounting plates being oppositely arranged, the first installation
Worm screw is movably installed on plate, two worm screws are located at the two sides of loading plate, worm and wheel engagement；The upper surface of support baseboard is also
It is fixed with two piece of second mounting plate, for the second mounting plate between two piece of first ipsilateral mounting plate, connecting rod is fixed on second
On mounting plate；
Fixed mechanism includes two clamping devices being oppositely arranged, and clamping device includes movable plate, the lower surface of movable plate
It is fixed with the first support plate and the second support plate, the first support plate is installed on worm screw, and the first support plate surface is provided with internal screw thread
Hole, internal thread hole are engaged with worm screw, and the second support plate is sheathed in connecting rod and the second support plate can be slided along connecting rod；Activity
The upper surface of plate is fixed with clamping plate, and equally distributed heat release hole is provided on clamping plate.
Further, two pieces of risers and loading plate surround inverted U-shaped, and loading plate is used for placing battery, loading plate
Surface be provided with equally distributed heat release hole.
Further, first mounting plate is parallel to riser setting and is located at the outside of riser.
Beneficial effects of the present invention:
Battery to preliminary filling is first placed in cell support plate by the present invention before carrying out preliminary filling, and control motor makes folder
Plate moves down, until clamping battery, after clamping battery, then carries out subsequent preliminary filling process；By using cell fixing device
Battery is fixed, stablizes battery and carries out subsequent preliminary filling process, can effectively avoid the vibration of battery to douche effect
Influence, meanwhile, protective action can also be played to battery by fixing battery, and is provided on loading plate and clamping plate equally distributed
Heat release hole realizes good heat dissipation on the basis of to battery effective protection, and the fixation device realizes fixed mode letter
It is single, quick, strong operability；
It is charged in the preliminary filling first step of the present invention with amplitude for the current versus cell of 0.05C, charging time 30min,
The voltage of battery rises to 3.2V~3.3V at this time, which can make battery core surface form stable, uniform, fine and close solid electricity
Matter interfacial film is solved, the cycle performance and service life of battery are greatly improved；
In preliminary filling second step of the present invention when cell voltage is lower than 3.7V, which can be further such that battery core surface shape
At stabilization, uniform, fine and close solid electrolyte interface film, multi-level progress solid electrolytic is carried out by amplitude high current at this time
Matter interfacial film generates, and can greatly improve the stability and homogeneity of battery core solid electrolyte interface film；
Preliminary filling electric current is increased in preliminary filling third step of the present invention, until the voltage of battery reaches charge cutoff voltage, the charging
Blanking voltage is 4.2V, because solid electrolyte interface film is completed in the charging process, admittedly and analysis lithium can be not concerned about and control electricity
Flow velocity degree；
The present invention by before preliminary filling use special cell fixing device battery is fixed, then use four step rule pair
Battery carries out preliminary filling, first passes through lesser current versus cell and carries out preliminary filling, so that forming solid electrolyte interface film in battery core, so
After have stepped through the biggish electric current of amplitude and charge, the method can improve analysis lithium problem, improve battery core security performance and its
Service life.
Detailed description of the invention
In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the drawings.
Fig. 1 is the structural schematic diagram of cell fixing device of the present invention；
Fig. 2 is the structural schematic diagram of the pedestal of cell fixing device of the present invention；
Fig. 3 is the structural schematic diagram of the fixed mechanism of cell fixing device of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
A kind of method for pre-charging improving analysis lithium, Step 1: the battery to preliminary filling is placed on loading plate 15, control electricity
Machine keeps movable plate 21 mobile to centre, until clamping plate 24 clamps battery, after clamping battery, the amplitude of first electric current is
0.05C, wherein C indicates battery capacity, if battery capacity C is 1000mAh, the charging current of 0.05C is 50mA.It is with amplitude
The current versus cell of 0.05C charges, and charging time 30min, the voltage of battery rises to 3.2V~3.3V at this time, the process
Battery core surface can be made to form stable, uniform, fine and close solid electrolyte interface film, greatly improve the cyclicity of battery
Energy and service life.
Step 2: predetermined voltage range is reached with the voltage that the second electric current continues to charge to the battery to the battery,
The current value of first electric current is less than the current value of the second step electric current.When cell voltage is lower than 3.7V, the process
Electricity can be increased further such that battery core surface forms stable, uniform, fine and close solid electrolyte interface film, to pass through amplitude at this time
Stream carries out multi-level progress solid electrolyte interface film generation, can greatly improve the stabilization of battery core solid electrolyte interface film
Property and homogeneity.Referring to Fig. 1, the amplitude of second electric current is 0.1C~0.2C, which is 3.5V~3.7V,
During this can the formation at many levels to solid electrolyte interface film play the role of perfect, while improving battery core because polarization is brought
Analysis lithium problem.
Step 3: increasing preliminary filling electric current, until the voltage of battery reaches charge cutoff voltage, which is
4.2V, because solid electrolyte interface film is completed in the charging process, admittedly and analysis lithium can be not concerned about and control rate of current.
Step 4: reaching 0.02C electricity with the electric current that 4.0V~4.2V constant pressure charge to the battery to the battery
Stream.
It please refers to shown in Fig. 1-3, cell fixing device, as shown in Figure 1, including pedestal 1 and the fixation being installed on pedestal 1
Mechanism 2；
As shown in Fig. 2, pedestal 1 includes support baseboard 11, the center of support baseboard 11 is movably installed with shaft 12, axis
Worm gear 13 is fixed on bar 12, preferably, shaft 12 is connected with motor, and motor driven shaft 12 rotates；Support baseboard 11 it is upper
Surface is fixed with two pieces of risers being oppositely arranged 14, and even block riser 14 is connected by loading plate 15, specifically, two pieces of 14 Hes of riser
Loading plate 15 surrounds inverted U-shaped, and the outer surface of riser 14 is fixed with connecting rod 16, and loading plate 15 is used for placing battery, holds
The surface of support plate 15 is provided with equally distributed heat release hole；The top surface edge position of support baseboard 11 is fixed with two pairs and is oppositely arranged
The first mounting plate 17, the first mounting plate 17 is parallel to the setting of riser 14 and is located at the outside of riser 14, on the first mounting plate 17
It is movably installed with worm screw 18, two worm screws 18 are located at the two sides of loading plate 15, and worm screw 18 engages with worm gear 13；Support baseboard 11
Upper surface is further fixed on two piece of second mounting plate 19, and the second mounting plate 19 is between two piece of first ipsilateral mounting plate 17, even
Extension bar 16 is fixed on the second mounting plate 19；
As shown in figure 3, fixed mechanism 2 includes two clamping devices being oppositely arranged, clamping device includes movable plate 21, living
The lower surface of movable plate 21 is fixed with the first support plate 22 and the second support plate 23, and the first support plate 22 is installed on worm screw 18, the
One support plate, 22 surface is provided with internal thread hole, and internal thread hole is engaged with worm screw 18, and the second support plate 23 is sheathed in connecting rod 16
And second support plate 23 can be slided along connecting rod 16；The upper surface of movable plate 21 is fixed with clamping plate 24, is provided on clamping plate 24 uniformly
The heat release hole of distribution；
The working principle and mode of the cell fixing device:
Start the motor that shaft 12 connects, the rotation of shaft 12 drives worm gear 13 to rotate, passes through nibbling for worm gear 13 and worm screw 18
Transmission is closed, two worm screws 18 rotate, and worm screw 18 engages with the internal thread hole 13 on 22 surface of the first support plate, and in the second support plate
Under 23 position-limiting action, the rotation of worm screw 18 will drive two pieces of movable plates 21 and slide axially along worm screw 18, and two clamping devices are phases
To setting, therefore, the moving direction of two pieces of movable plates 21 is opposite；In use, the battery to preliminary filling is placed in loading plate 15
On, motor is controlled, keeps movable plate 21 mobile to centre, until clamping plate 24 clamps battery, after clamping battery, then is carried out subsequent pre-
Fill process；Battery is fixed by using cell fixing device, stablizes battery and carries out subsequent preliminary filling process, Neng Gouyou
Effect avoids the vibration of battery to the influence of douche effect, meanwhile, protective action can also be played to battery by fixing battery, and be carried
It is provided with equally distributed heat release hole on plate 15 and clamping plate 14, realizes good heat dissipation on the basis of to battery effective protection,
And the fixation device realizes that fixed mode is simple, quick, strong operability.
Performance test:
2 groups of experiment battery cores are sampled, every group each 15, carry out preliminary filling using following process respectively after dry-storage:
Scheme 1: being the pre-charge 30min of 0.05C with amplitude, then with amplitude for 0.5C pre-charge to 4.2V,
It is finally the electric current of 0.01C until being full of with amplitude.
Scheme 2: being the pre-charge 30min of 0.05C with amplitude, then with amplitude for 0.1C pre-charge to 3.5V,
Turn pre-charge that amplitude is 0.5C to 4.0V, goes to constant pressure 4.2V charge value electric current and drop to 0.02C and be full of.
The preliminary filling that this two groups of experiment battery cores are counted after preliminary filling is time-consuming, each random dissection 5 of corresponding group of each scheme
Battery core carries out observation analysis to the analysis lithium situation of this 5 battery cores, obtains: by the average charge for the battery core that scheme 1 charges
Time is about 275min；The average charge time of the battery core to be charged by scheme 2 is about 230min, and scheme 2 is filled
The electric time significantly reduces.And randomly select 5 battery cores respectively from two groups of battery cores and dissected, it is found by observation comparison, with
The two panels that machine is chosen is uniform by the battery core surface color that scheme 2 charges, almost without there is argenteous lithium metal, and
The two panels randomly selected has apparent silvery white color substance distribution by the battery core surface that scheme 1 charges, and analyses for lithium ion
Occur as.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (8)
1. a kind of method for pre-charging for improving analysis lithium, which comprises the steps of:
Step 1: the battery to preliminary filling is placed on loading plate (15), motor is controlled, keeps movable plate (21) mobile to centre,
Until clamping plate (24) clamp battery, after clamping battery, charged with the first current versus cell, so that the battery core table of the battery
Face forms solid electrolyte interface film；
Step 2: reaching predetermined voltage range with the voltage that the second electric current continues to charge to the battery to the battery；
The current value of first electric current is less than the current value of second electric current；
Step 3: reaching predetermined voltage range with the voltage that third electric current continues to charge to the battery to the battery；
The current value of second electric current is less than the current value of the third step electric current；
Step 4: with constant-voltage charge to by electric current 0.02C.
2. a kind of method for pre-charging for improving analysis lithium according to claim 1, which is characterized in that with the first electric current in step 1
The step of charging the battery specifically: it is charged with amplitude for the current versus cell of 0.05C, charging time 30min,
So that the voltage of the battery reaches 3.2V~3.3V.
3. a kind of method for pre-charging for improving analysis lithium according to claim 1, which is characterized in that with the second electric current in step 2
The step of predetermined voltage range is reached to the voltage that the battery continues to charge to the battery specifically: with amplitude for 0.1C~
The voltage that the electric current of 0.2C charge to the battery to the battery reaches 3.5V~3.7V.
4. a kind of method for pre-charging for improving analysis lithium according to claim 1, which is characterized in that with third electric current in step 3
The step of predetermined voltage range is reached to the voltage that the battery continues to charge to the battery specifically: with amplitude for 0.3C~
The voltage that the electric current of 0.5C charge to the battery to the battery reaches 4.0V~4.2V.
5. a kind of method for pre-charging for improving analysis lithium according to claim 1, which is characterized in that the step of step 4 is specific
Are as follows: 0.02C electric current is reached with the electric current that 4.0V~4.2V constant pressure charge to the battery to the battery.
6. a kind of method for pre-charging for improving analysis lithium according to claim 1, which is characterized in that the cell fixing device,
Including pedestal (1) and the fixed mechanism (2) being installed on pedestal (1)；
Pedestal (1) includes support baseboard (11), and the center of support baseboard (11) is movably installed with shaft (12), shaft (12)
On be fixed with worm gear (13)；The upper surface of support baseboard (11) is fixed with two pieces of risers being oppositely arranged (14), even block riser
(14) it is connected by loading plate (15), the outer surface of riser (14) is fixed with connecting rod (16)；The upper table of support baseboard (11)
Face marginal position is fixed with two pairs of first mounting plates (17) being oppositely arranged, and the first mounting plate is movably installed with worm screw on (17)
(18), two worm screws (18) are located at the two sides of loading plate (15), and worm screw (18) engages with worm gear (13)；Support baseboard (11) it is upper
Surface is further fixed on two piece of second mounting plate (19), the second mounting plate (19) be located at two piece of first ipsilateral mounting plate (17) it
Between, connecting rod (16) is fixed on the second mounting plate (19)；
Fixed mechanism (2) includes two clamping devices being oppositely arranged, and clamping device includes movable plate (21), movable plate (21)
Lower surface is fixed with the first support plate (22) and the second support plate (23), and the first support plate (22) is installed on worm screw (18), the
One support plate (22) surface is provided with internal thread hole, and internal thread hole is engaged with worm screw (18), and the second support plate (23) is sheathed on connection
On bar (16) and the second support plate (23) can be slided along connecting rod (16)；The upper surface of movable plate (21) is fixed with clamping plate (24),
Clamping plate is provided with equally distributed heat release hole on (24).
7. it is according to claim 6 it is a kind of improve analysis lithium method for pre-charging, which is characterized in that two pieces of risers (14) and
Loading plate (15) surrounds inverted U-shaped, and loading plate (15) is used for placing battery, and the surface of loading plate (15) is provided with equally distributed
Heat release hole.
8. a kind of method for pre-charging for improving analysis lithium according to claim 6, which is characterized in that first mounting plate (17)
It is parallel to riser (14) setting and is located at the outside of riser (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910492099.4A CN110165318B (en) | 2019-06-06 | 2019-06-06 | Pre-charging method for improving lithium separation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910492099.4A CN110165318B (en) | 2019-06-06 | 2019-06-06 | Pre-charging method for improving lithium separation |
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| CN110165318B CN110165318B (en) | 2022-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112582695A (en) * | 2019-09-29 | 2021-03-30 | 宁德新能源科技有限公司 | Charging method, electronic device, and storage medium |
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| JPH08308123A (en) * | 1995-04-28 | 1996-11-22 | Sanyo Electric Co Ltd | Method for charging a plurality of lithium ion batteries |
| CN102299385A (en) * | 2011-07-29 | 2011-12-28 | 南京双登科技发展研究院有限公司 | Soft package lithium iron phosphate power battery initial charge formation method |
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| CN112582695A (en) * | 2019-09-29 | 2021-03-30 | 宁德新能源科技有限公司 | Charging method, electronic device, and storage medium |
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| US11742531B2 (en) | 2019-09-29 | 2023-08-29 | Ningde Amperex Technology Limited | Charging method, electronic apparatus, and storage medium |
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| CN110165318B (en) | 2022-02-18 |
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