CN108306062A - Improve chemical synthesizing method, Battery formation fixture and application and the Soft Roll power battery of Soft Roll power battery cycle life - Google Patents
Improve chemical synthesizing method, Battery formation fixture and application and the Soft Roll power battery of Soft Roll power battery cycle life Download PDFInfo
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- CN108306062A CN108306062A CN201810095451.6A CN201810095451A CN108306062A CN 108306062 A CN108306062 A CN 108306062A CN 201810095451 A CN201810095451 A CN 201810095451A CN 108306062 A CN108306062 A CN 108306062A
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 74
- 239000000126 substance Substances 0.000 title claims abstract description 70
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 54
- 238000011049 filling Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000002788 crimping Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 239000005341 toughened glass Substances 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000007654 immersion Methods 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000005755 formation reaction Methods 0.000 description 74
- 230000000052 comparative effect Effects 0.000 description 29
- 239000000243 solution Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- LLQHSBBZNDXTIV-UHFFFAOYSA-N 6-[5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-4,5-dihydro-1,2-oxazol-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC1CC(=NO1)C1=CC2=C(NC(O2)=O)C=C1 LLQHSBBZNDXTIV-UHFFFAOYSA-N 0.000 description 1
- 206010020852 Hypertonia Diseases 0.000 description 1
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
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- 239000003153 chemical reaction reagent Substances 0.000 description 1
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- 238000000280 densification Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000010294 electrolyte impregnation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000009459 flexible packaging Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention provides a kind of chemical synthesizing method, Battery formation fixture and application improving Soft Roll power battery cycle life and Soft Roll power batteries, are related to Soft Roll power battery technology field.The chemical synthesizing method includes that the battery for completing fluid injection is stood using more echelon vacuum, after vacuum seal processing, the battery after vacuum seal is placed in Battery formation fixture again be aged, preliminary filling electric treatment, stand and etc., wherein, the immersion liquid method stood using echelon vacuum after fluid injection, electrolyte absorption rate can be shortened, shorten the sepage time；Ageing process is stood using pressure, electrolyte can be made to infiltrate more abundant under a certain pressure；Preliminary filling electric treatment uses Battery formation fixture, and the contact of battery plus-negative plate plate can be made close, and the SEI film components of formation are consistent, and face thickness is uniform, stablizes.The present invention also provides Battery formation fixtures, and the clamp structure is simple, easy to use, are suitable for industrial production use.
Description
Technical field
The present invention relates to Battery formation technical fields, in particular to a kind of raising Soft Roll power battery cycle life
Chemical synthesizing method, Battery formation fixture and application and Soft Roll power battery.
Background technology
Since Soft Roll power battery is packed using aluminum-plastic composite membrane, using same raw materials, relatively
Have the characteristics that weight is lighter, capacity bigger, internal resistance smaller, flexible design, safety higher in hard shell battery, it is more and more
New energy vehicle enterprise and power battery manufacturer favored.
The chemical synthesis technology of Soft Roll power battery especially large capacity Soft Roll power battery (50Ah or more) is in production process
Important procedure, have special technological requirement and technological difficulties.Chemical conversion is that the battery after being shelved to fluid injection is filled for the first time
Electricity forms the process of solid electrolyte section film (SEI films), and the SEI films of different chemical synthesis technologies, formation are then different, and
Different SEI films are affected to battery performance, especially to the cycle performance of battery.Current most of Soft Roll power batteries
It is stood by quiescence in high temperature or room temperature to realize the infiltration and absorption of electrolyte, and by pressing the current versus cell of small multiplying power to carry out
Precharge, achievees the purpose that active cell.
But the chemical synthesizing method of current Soft Roll power battery has the following defects：(1) the sepage time is long, quiescence in high temperature
Energy consumption is big, and standing effect is poor, and electrolyte degree of absorption is inconsistent；(2) forming current is small, and time-consuming too long, SEI films are uneven, surely
Qualitative difference；(3) due to chemical conversion electrode surface SEI films is uneven and unstable when, leads to the repetition of SEI films in cyclic process
It destroys and repairs, the increase of irreversible capacity, the service life of battery is caused to shorten.
In view of this, special propose the present invention.
Invention content
First of the present invention is designed to provide a kind of chemical synthesizing method improving Soft Roll power battery cycle life, can make
It obtaining electrolyte and infiltrates more abundant, shorten digestion time, and the contact of battery plus-negative plate plate is close, the SEI film components of formation are consistent,
Face thickness is uniform, stablizes, and then improves the service life cycle of Soft Roll power battery.
Second object of the present invention is to provide a kind of Battery formation clamp structure and is simple and convenient to operate, and can be used for
It states in the chemical synthesizing method for improving Soft Roll power battery cycle life.
Third object of the present invention be to provide a kind of chemical synthesizing method improving Soft Roll power battery cycle life and
Application of the Battery formation fixture in Soft Roll power battery production process.
Fourth object of the present invention is to provide a kind of Soft Roll power battery.
In order to realize that the above-mentioned purpose of the present invention, spy use following technical scheme：
The present invention provides a kind of chemical synthesizing method improving Soft Roll power battery cycle life, includes the following steps：
(a) the battery vacuum for completing fluid injection is stood, and used vacuum pressure is reduced step by step by echelon, after vacuum is stood
Carry out vacuum seal；
(b) battery after vacuum seal is placed in Battery formation fixture and is aged, the mode of ageing stands for pressure；
(c) after standing pressure and the battery that is placed in Battery formation fixture is into line precharge processing, until precharge terminates；
(d) battery standing that precharge is terminated and is placed in Battery formation fixture, i.e. chemical conversion terminate；
Wherein, in step (b)-(d), it is 300~500 kilograms that Battery formation fixture, which acts on the pressure on battery,.
Further, in step (a), the total time that vacuum is stood is 30~150s, and the vacuum pressure that vacuum is stood is -40
~-90kPa, is divided into 3~5 echelons, and the vacuum pressure of each echelon is reduced step by step by echelon；
Preferably, the vacuum pressure that vacuum is stood is divided into 5 echelons, and the vacuum pressure of each echelon is followed successively by -40~-
The time of repose of 45kPa, -50~-55kPa, -65~-75kPa, -80~-85kPa and -85~-90kPa, each echelon are 10
~30s；
Preferably, the vacuum pressure of vacuum seal be -60~-80kPa, preferably -62~-75kPa, further preferably
For -65~-72kPa.
Further, in step (b), pressure stand temperature be 25~60 DEG C, preferably 28~60 DEG C, further preferably
It is 30~55 DEG C；
Preferably, in step (b), pressure stand time be 6~48h, preferably 7~46h, further preferably 8~
45h。
Further, in step (c), the temperature of preliminary filling electric treatment is 35~65 DEG C, preferably 36~62 DEG C, further excellent
It is selected as 38~60 DEG C；
Preferably, in step (c), when preliminary filling electric treatment, with 0.01~0.03C, 10~30min of constant-current charge, upper limit voltage
For 3900mV；With 0.02~0.1C, 60~180min of constant-current charge, upper limit voltage 3900mV；It is filled with 0.05~0.3C constant currents
Electricity 60~180min, upper limit voltage 3900mV.
Further, in step (d), dwell temperature be 25~60 DEG C, preferably 28~60 DEG C, further preferably 30~
55℃；
Preferably, in step (d), time of repose is 2~10h, preferably 2.5~9.5h, further preferably 3~8h.
Further, it is 300~480 kilograms that the Battery formation fixture, which acts on the pressure on battery,；
Preferably, the cycle life of the Soft Roll power battery is promoted to 20~50%.
The present invention also provides applied to the Battery formation folder in the chemical synthesizing method for improving Soft Roll power battery cycle life
Tool, the Battery formation fixture includes first clamping plate, second clamping plate and clip, the first clamping plate, second clamping plate and card
Folder is to be detachably connected, and the first clamping plate and second clamping plate are cleat insulator, and the clip is elastic component；
The first clamping plate, second clamping plate be respectively placed in two surfaces of battery, battery be located at the first clamping plate and
Between second clamping plate, the first clamping plate and second clamping plate are clamped to apply pressure to battery with the clip.
Further, the clip includes that the first fixed part, the second fixed part and the first fixed part of connection and second are solid
Determine the interconnecting piece in portion, one end of first fixed part and the second fixed part is connected with the interconnecting piece, and described first fixes
The one end of portion and the second fixed part far from interconnecting piece is both provided with crimping；
The distance between first fixed part and the second fixed part are adjustable, first fixed part and the second fixed part
The first clamping plate and second clamping plate surface can be respectively acting on to apply pressure to battery；
Preferably, the first clamping plate and second clamping plate are tempered glass；
Preferably, the pressure that the Battery formation fixture acts on battery surface is 300~500 kilograms.
The present invention also provides a kind of chemical synthesizing methods improving Soft Roll power battery cycle life or Battery formation fixture to exist
Application in Soft Roll power battery production process.
The present invention also provides a kind of Soft Roll power batteries, using the chemical conversion of above-mentioned raising Soft Roll power battery cycle life
Method is made.
Compared with prior art, the chemical synthesizing method, battery provided by the invention for improving Soft Roll power battery cycle life
It is had the advantages that at fixture and application and Soft Roll power battery：
(1) include mainly by fluid injection the present invention provides a kind of chemical synthesizing method improving Soft Roll power battery cycle life
The battery of completion is stood, after vacuum seal processing using more echelon vacuum, then the battery after vacuum seal is placed in Battery formation
Be aged in fixture, preliminary filling electric treatment, stand and etc., wherein after fluid injection using echelon vacuum stand immersion liquid method, can
It is impregnated with rate to promote electrolyte, shortens the sepage time；Ageing process is stood using pressure, can make electrolysis under a certain pressure
Liquid infiltrates more abundant；It is pre-charged processing procedure and equally uses Battery formation fixture, keep the contact of battery plus-negative plate plate close, formed
SEI film components it is consistent, face thickness uniformly, stablize, improve that sepage time existing in the prior art is long, electrolyte absorbs journey
The defects of it is uneven and unstable to spend SEI films that are inconsistent and being formed, and then battery cycle life is caused to shorten.
(2) it influences each other, complements each other between each step in chemical synthesizing method provided by the invention, it is indispensable, by upper
The synergy of each step is stated, the cycle life of Soft Roll power battery could be improved.The results showed raising provided by the invention
The chemical synthesizing method of Soft Roll power battery cycle life can shorten and be aged 6~12h of sepage time, and shortening precharge processing time 6~
12h, while production efficiency is provided, can also make battery capacity improve 1~3%, make battery cycle life promoted 20~
50%, while the high-temperature behavior of battery, cryogenic property and high rate performance are also promoted.
(3) the present invention also provides a kind of Battery formation fixture, the Battery formation fixture battery surface can be applied stablize,
Uniform pressure is ensured with ensureing not influenced current density by physical impedances such as bubble, gaps between battery pole piece and diaphragm
The whole surface current density of every pole piece is identical when chemical conversion, and the thickness of the SEI films of formation is uniform, and then improves Soft Roll power electric
The cycle life in pond.In addition, the Battery formation fixture is simple and convenient to operate, it is suitable for industrial production use.
(4) the present invention also provides the chemical synthesizing methods and Battery formation fixture that improve Soft Roll power battery cycle life
Using, advantage possessed by the chemical synthesizing method and Battery formation fixture in view of above-mentioned raising Soft Roll power battery cycle life,
Make it that there is good application in Soft Roll power battery production process.
(5) the present invention also provides a kind of Soft Roll power batteries, are made by the chemical synthesizing method of above-mentioned Soft Roll power battery,
The Soft Roll power battery has longer service life.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of Battery formation fixture；
Fig. 2 is the front view of Fig. 1 Battery formation fixtures；
Fig. 3 is the side view of one angle of Fig. 1 Battery formations fixture；
Fig. 4 is the side view of another angle of Fig. 1 Battery formation fixtures；
Fig. 5 is the structural schematic diagram of clip；
Fig. 6 is the cycle life curve figure of Soft Roll power battery；Wherein, a is embodiment 1；B is comparative example 1；
Fig. 7 is the 1C discharge capacity curve graphs of Soft Roll power battery；Wherein, a is embodiment 1；B is comparative example 1.
Icon：10- batteries；21- first clamping plates；22- second clamping plates；30- clips；The first fixed parts of 31-；32- second is solid
Determine portion；33- interconnecting pieces；34- crimpings.
Specific implementation mode
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
According to the first aspect of the invention, a kind of chemical synthesizing method improving Soft Roll power battery cycle life is provided,
Include the following steps：
(a) the battery vacuum for completing fluid injection is stood, and used vacuum pressure is reduced step by step by echelon, after vacuum is stood
Carry out vacuum seal；
(b) battery after vacuum seal is placed in Battery formation fixture and is aged, the mode of ageing stands for pressure；
(c) after standing pressure and the battery that is placed in Battery formation fixture is into line precharge processing, until precharge terminates；
(d) battery standing that precharge is terminated and is placed in Battery formation fixture, i.e. chemical conversion terminate；
Wherein, in step (b)-(d), it is 300~500 kilograms that Battery formation fixture, which acts on the pressure on battery,.
Since flexible packaging power battery uses aluminum-plastic packaging structure, appearance structure to determine that pole piece is unable to close-packed arrays,
Gap is easy tod produce between pole piece, the gas generated in battery forming process is also easy to remain between pole piece, later
Gas cannot be completely exhausted out in sealing, to influence the service life of battery.
For this purpose, the present invention provides a kind of chemical synthesizing method improving Soft Roll power battery cycle life, main includes that will note
The battery that liquid is completed is stood using more echelon vacuum, after vacuum seal processing, then the battery after vacuum seal is placed in battery
At be aged in fixture, preliminary filling electric treatment, stand and etc., wherein after fluid injection using echelon vacuum stand immersion liquid method,
Electrolyte impregnation rate can be promoted, the sepage time is shortened；Ageing process is stood using pressure, can make electricity under a certain pressure
Solution liquid infiltrates more abundant；It is pre-charged processing procedure and equally uses Battery formation fixture, keep the contact of battery plus-negative plate plate close, shape
At SEI film components it is consistent, face thickness uniformly, stablize, improve that sepage time existing in the prior art is long, electrolyte absorbs
Degree is inconsistent and the SEI films that are formed are uneven and unstable, and then the defects of cause battery to shorten.
During the standing of the ageing of step (b), the preliminary filling electric treatment of step (c) and step (d), battery is used always
Battery formation clamp applies identical power and acts on battery surface, ensures between battery pole piece and diaphragm not by physics such as bubble, gaps
Impedance and influence current density, ensure chemical conversion when every pole piece whole surface current density it is identical, the thickness of the SEI films of formation
Uniformly, and SEI film components are identical.For battery, SEI films stabilization is laid a solid foundation during later stage use, and battery is prevented to be circulated throughout
The decomposition of SEI films in journey lives again, repairs, and causes irreversible Li+Loss, prevent battery capacity decaying fast, short life.
In step (b)-(d), Battery formation fixture act on the pressure on battery be 300~500 kilograms, preferably 300
~480 kilograms, further preferably 320~450 kilograms.Battery formation fixture acts on typical but non-limiting pressure on battery
Power is that 300 kilograms, 320 kilograms, 350 kilograms, 380 kilograms, 400 kilograms, 420 kilograms, 450 kilograms, 480 kilograms or 500 are public
Jin.
By acting on Battery formation fixture the restriction of the pressure on battery, ensureing fully exclude battery pole piece
Gas and gap simultaneously, also avoid suction of the too big pressure influence battery electrolyte in positive/negative plate and diaphragm between diaphragm
It is attached.
Specifically, a kind of preferred embodiment as the present invention, in step (a), total time that vacuum is stood is 30~
150s, the vacuum pressure that vacuum is stood are -40~-90kPa, are divided into 3~5 echelons, and the vacuum pressure of each echelon presses echelon
It reduces step by step.
It should be noted that vacuum is stood to the vacuum pressure of process to be reduced step by step by echelon, electrolyte can be promoted and contained
Rate is soaked, the sepage time is shortened.
Vacuum stand typical but non-limiting total time such as 30s, 40s, 50s, 60s, 70s, 80s, 90s, 100s,
110s, 120s, 130s, 140s or 150s.Vacuum stand typical but non-limiting vacuum pressure be -40kPa, -45kPa, -
50kPa, -55kPa, -60kPa, -65kPa, -70kPa, -75kPa, -80kPa, -85kPa or -90kPa.
The vacuum pressure that vacuum is stood can be divided into 3,4 or 5 echelons.
Preferably, when the vacuum pressure that vacuum is stood is divided into 3 echelons, the vacuum pressure of each echelon is followed successively by -40~-
The time of repose of 45kPa, -65~-70kPa and -85~-90kPa, each echelon are 10~30s；
Preferably, when the vacuum pressure that vacuum is stood is divided into 4 echelons, the vacuum pressure of each echelon is followed successively by -40~-
The time of repose of 45kPa, -60~-65kPa, -75~-80kPa and -85~-90kPa, each echelon are 10~30s；
Preferably, when the vacuum pressure that vacuum is stood is divided into 5 echelons, the vacuum pressure of each echelon is followed successively by -40~-
The time of repose of 45kPa, -50~-55kPa, -65~-75kPa, -80~-85kPa and -85~-90kPa, each echelon are 10
~30s.
The realization of above-mentioned difference vacuum pressure can be configured by different vacuum cavities.For example, when vacuum is quiet
When the vacuum pressure set is divided into 3 echelons, corresponding 3 vacuum cavities；When the vacuum pressure that vacuum is stood is divided into 4 echelons,
Corresponding 4 vacuum cavities；When the vacuum pressure that vacuum is stood is divided into 5 echelons, corresponding 5 vacuum cavities.Each vacuum cavity
The different vacuum pressure of middle correspondence.
As a kind of preferred embodiment of the present invention, the vacuum pressure of vacuum seal is -60~-80kPa, preferably -
62~-75kPa, further preferably -65~-72kPa.
The typical but non-limiting vacuum pressure of vacuum seal be -60kPa, -62kPa, -65kPa, -68kPa, -
70kPa, -72kPa, -75kPa, -78kPa or -80kPa.
During carrying out pressure standing to battery using Battery formation fixture, dwell temperature and time of repose are for old
The change time also has a certain impact.
As a kind of preferred embodiment of the present invention, in step (b), the temperature that pressure is stood is 25~60 DEG C, preferably
It is 28~60 DEG C, further preferably 30~55 DEG C；Pressure stand typical but non-limiting temperature be 25 DEG C, 28 DEG C, 30 DEG C,
35 DEG C, 40 DEG C, 45 DEG C, 50 DEG C, 55 DEG C or 60 DEG C.It is stood under 25 DEG C~60 DEG C high temperature, digestion time can be greatly shortened,
12-18h is foreshortened to by traditional left and right for 24 hours, improves the resource utilization of production effect.
Preferably, in step (b), pressure stand time be 6~48h, preferably 7~46h, further preferably 8~
45h.Pressure stand typical but non-limiting time be 6h, 7h, 8h, 10h, 12h, 15h, 18h, 20h, for 24 hours, 30h, 36h,
40h, 45h, 46h or 48h.
As a kind of preferred embodiment of the present invention, in step (c), the temperature of preliminary filling electric treatment is 35~65 DEG C, excellent
It is selected as 36~62 DEG C, further preferably 38~60 DEG C；The typical but non-limiting temperature of preliminary filling electric treatment be 35 DEG C, 36 DEG C,
38 DEG C, 40 DEG C, 45 DEG C, 50 DEG C, 55 DEG C, 60 DEG C, 62 DEG C or 65 DEG C.
As a kind of preferred embodiment of the present invention, in step (c), when preliminary filling electric treatment, with 0.01~0.03C perseverances
10~30min of current charge, upper limit voltage 3900mV；With 0.02~0.1C, 60~180min of constant-current charge, upper limit voltage is
3900mV；With 0.05~0.3C, 60~180min of constant-current charge, upper limit voltage 3900mV.
Specifically, with 0.01~0.03C constant-current charges, 10~30min, typical but non-limiting constant current is
0.01C, 0.015C, 0.02C, 0.025C or 0.03C, the typical but non-limiting charging time be 10min, 15min, 20min,
25min or 30min；
With 0.02~0.1C constant-current charges, 60~180min, typical but non-limiting constant current be 0.02C,
0.03C, 0.04C, 0.05C, 0.06C, 0.07C, 0.08C, 0.09C or 0.1C, typical but non-limiting charging time be
60min, 80min, 100min, 120min, 140min, 150min, 160min or 180min；
With 0.05~0.3C constant-current charges, 60~180min, typical but non-limiting constant current be 0.05C, 0.1C,
0.15C, 0.2C, 0.25C or 0.3C, the typical but non-limiting charging time be 60min, 80min, 100min, 120min,
140min, 150min, 160min or 180min.
Preliminary filling electric treatment can allow electrode surface to form stable SEI films, that is, be equivalent to one battery " activation "
Process.And SEI films can will be being formed using charging current is stepped up to battery progress step charge in preliminary filling electric treatment
During the pernicious gas that generates be discharged in time, preferably ensure Li+Migration, make the SEI films to be formed it is more uniform, stablize
And densification, to improve its cycle performance and big multiplying power discharging property.It, can be significantly meanwhile using above-mentioned precharge processing step
Shorten precharge time foreshortens to 4-6h by traditional 10-12h, can significantly improving production efficiency.
A kind of preferred embodiment as the present invention further includes after standing pressure and setting before preliminary filling electric treatment
The step of battery standing in Battery formation fixture.This process will measure cell voltage, and underproof battery product is arranged
It removes.
After precharge, the battery standing being placed in Battery formation fixture can further promote the synthesis of battery
Performance.As a kind of preferred embodiment of the present invention, in step (d), dwell temperature is 25~60 DEG C, preferably 28~60
DEG C, further preferably 30~55 DEG C；Typical but non-limiting dwell temperature be 25 DEG C, 28 DEG C, 30 DEG C, 35 DEG C, 40 DEG C, 45
DEG C, 50 DEG C, 55 DEG C, 60 DEG C, 62 DEG C or 65 DEG C.
Preferably, in step (d), time of repose is 2~10h, preferably 2.5~9.5h, further preferably 3~8h；
Typical but non-limiting time of repose be 2h, 2.5h, 3h, 3.5h, 4.0h, 4.5h, 5h, 5.5h, 6h, 6.5h, 7.0h,
7.5h or 8h.
As a kind of preferred embodiment of the present invention, Soft Roll power battery cycle life is promoted to 20~50%.Soft Roll
The typical but non-limiting promotion percentage of power battery cycle life is 25%, 30%, 35%, 40%, 45% or 50%.
The present invention also provides applied to the Battery formation folder in the chemical synthesizing method for improving Soft Roll power battery cycle life
Tool, concrete structure are as shown in Figs. 1-5.
Specifically, the Battery formation fixture includes first clamping plate 21, second clamping plate 22 and clip 30, first clamping plate 21,
Second splint 22 and clip 30 are to be detachably connected, and first clamping plate 21 and second clamping plate 22 are cleat insulator, and clip 30 is bullet
Property part；
First clamping plate 21, second clamping plate 22 are respectively placed in two surfaces of battery 10, battery 10 is located at first clamping plate 21
Between second clamping plate 22, first clamping plate 21 and second clamping plate 22 are clamped to apply pressure to battery 10 with clip 30.
By the Battery formation fixture, stable pressure can be applied to 10 surface of battery, to ensure battery pole piece and diaphragm
Between do not influenced current density by physical impedances such as bubble, gaps, ensure chemical conversion when every pole piece whole surface electric current it is close
Spend identical, the thickness of the SEI films of formation is uniform, and then improves the cycle life of Soft Roll power battery.
Specifically, first clamping plate 21, second clamping plate 22 and clip 30 are to be detachably connected, refer to first clamping plate, second
Component is independent from each other between clamping plate 22 and clip 30, each other when it is detachable.First clamping plate 21 and second is pressed from both sides
The material of plate 22 need to be only made of insulating material.The material of first clamping plate 21 and second clamping plate 22 can be identical, also may be used
With difference.As a kind of preferred embodiment of the present invention, first clamping plate 21 and second clamping plate 22 are tempered glass.
It should be noted that since first clamping plate 21 and second clamping plate 22 are to act on 10 surface of battery and apply one to it
Fixed pressure, therefore first clamping plate 21 and second clamping plate 22 itself should have some strength, and surface is smooth, smooth, with realize with
Battery 10 is upper and lower surfaces of to be come into full contact with.
To ensure that first clamping plate 21 and second clamping plate 22 apply stable active force to 10 surface of battery, first clamping plate 21 with
Second clamping plate 22 should be corresponding in 10 position upper and lower surfaces of of battery, and the size phase of first clamping plate 21 and second clamping plate 22
Together, so that active force suffered by battery 10 between first clamping plate 21 and second clamping plate 22 uniformly, it is consistent, steady, more have
Conducive to the exclusion of gas, gap between battery pole piece and diaphragm.
Clip 30 is elastic component, primarily to first clamping plate 21 and second clamping plate 22 are clamped, to pass through the
One clamping plate 21 and second clamping plate 22 apply active force to 10 surface of battery.
The structure of clip 30 can be diversified forms, as long as can reach the folder for stablizing first clamping plate 21 and second clamping plate 22
Hold the purpose on 10 surface of battery.
As the present invention a kind of preferred embodiment, clip 30 include the first fixed part 31, the second fixed part 32 and
Connect the interconnecting piece 33 of the first fixed part 31 and the second fixed part 32；
One end of first fixed part 31 and the second fixed part 32 is connected with interconnecting piece 33, and the first fixed part 31 and second is solid
Determine the one end of portion 32 far from interconnecting piece 33 and is both provided with crimping 34；
The distance between first fixed part 31 and the second fixed part 32 are adjustable, the first fixed part 31 and the second fixed part 32
First clamping plate 21 and 22 surface of second clamping plate are respectively acting on to apply pressure to battery 10.
It is " Ω " that the structure of clip 30 is similar, this kind of structure can be realized for the firm of first clamping plate 21 and second clamping plate 22
Clamping.First fixed part 31 and the second fixed part 32 are in mirror image.It is rolled up on first fixed part 31 and the second fixed part 32
The setting on side 34 contributes to the folding for controlling the first fixed part 31 and the second fixed part 32.
On technical solution of the present invention basis, under non-clamp position, on the first fixed part 31 and the second fixed part 32
The distance between two crimpings 34 be less than the length of interconnecting piece 33, while again smaller than first clamping plate 21, second clamping plate 22 and electricity
The sum of the thickness of 10 three of pond.
The connection type of first fixed part 31, the second fixed part 32 and interconnecting piece 33 is not particularly limited, and need to only ensure the
One fixed part 31 and the second fixed part 32 can carry out certain rotation along interconnecting piece 33 under external force.
As a kind of preferred embodiment of the present invention, 33 one of the first fixed part 31, the second fixed part 32 and interconnecting piece
Molding；
Alternatively, hinge may be used between the first fixed part 31 and interconnecting piece 33, between the second fixed part 32 and interconnecting piece 33
The mode connect is attached.
In order to increase the facility for the process of using, crimping 34 is set as arc.
On technical solution of the present invention basis, it is both provided on the crimping 34 of the first fixed part 31 and the second fixed part 32
Facilitate the clamp arm (not identified in figure) of the first fixed part 31 of control and the folding of the second fixed part 32.
Clamp arm is pluggable to be formed by crimping 34 in hole, to facilitate the folding angle of control clip 30.
Battery formation fixture act on 10 surface of battery pressure be 300-500 kilograms, preferably 300~480 kilograms,
Further preferably 320~450 kilograms.It is 300 public that Battery formation fixture, which acts on typical but non-limiting pressure on battery,
Jin, 320 kilograms, 350 kilograms, 380 kilograms, 400 kilograms, 420 kilograms, 450 kilograms, 480 kilograms or 500 kilograms.
By acting on Battery formation fixture the restriction of the pressure on battery 10, ensureing fully exclude battery pole
Gas and gap simultaneously, also avoid too big pressure from damaging battery 10 between piece and diaphragm.
The application method of Battery formation fixture：First fixed part 31 and the second fixed part 32 are positioned over two of battery 10
Behind surface, by controlling the distance between the first fixed part 31 and the second fixed part 32 so that clip 30 is clamped in first clamping plate
21 and second clamping plate 22 surface, to realize clamping of the Battery formation fixture for battery 10.
The present invention also provides a kind of chemical synthesizing methods improving Soft Roll power battery cycle life or Battery formation fixture to exist
Application in Soft Roll power battery production process.
It is excellent possessed by chemical synthesizing method and Battery formation fixture in view of above-mentioned raising Soft Roll power battery cycle life
Gesture makes it have good application in Soft Roll power battery production process.
The present invention also provides a kind of Soft Roll power batteries, using the chemical conversion of above-mentioned raising Soft Roll power battery cycle life
Method is made, which has longer service life.
With reference to specific embodiment and comparative example, the invention will be further described.
Embodiment 1
A kind of chemical synthesizing method improving Soft Roll power battery cycle life provided in this embodiment, includes the following steps：
(a) the battery vacuum for completing fluid injection is stood, and the vacuum pressure that vacuum is stood is divided into 5 echelons, each echelon it is true
Pneumatics power is respectively -40kPa, -50kPa, -65kPa, -80kPa and -85kPa, and the time of repose of each echelon is 10s；
Vacuum carries out vacuum seal after standing, the vacuum pressure of vacuum seal is -80kPa；
(b) battery after vacuum seal being placed in Battery formation fixture and is aged, the mode of ageing stands for pressure,
The temperature that pressure is stood is 35 DEG C, and the time that pressure is stood is 25h；
(c) after standing pressure and the battery that is placed in Battery formation fixture is into line precharge processing, as follows：
C1, standing；
C2, with 0.02C constant-current charge 20min, upper limit voltage 3900mV；
C3, with 0.05C constant-current charge 120min, upper limit voltage 3900mV；
C4, with 0.08C constant-current charge 180min, upper limit voltage 3900mV；
C5, terminate to precharge, detect voltage；
(d) precharge is terminated and the battery being placed in Battery formation fixture stands 6h in 35 DEG C, is i.e. chemical conversion terminates.
Wherein, in step (b)-(d), it is 300 kilograms that Battery formation fixture, which acts on the pressure on battery,.
Embodiment 2
A kind of chemical synthesizing method improving Soft Roll power battery cycle life provided in this embodiment, in addition to step (b)-(d)
It is 400 kilograms that middle Battery formation fixture, which acts on the pressure on battery, remaining is same as Example 1.
Embodiment 3
A kind of chemical synthesizing method improving Soft Roll power battery cycle life provided in this embodiment, in addition to step (b)-(d)
It is 500 kilograms that middle Battery formation fixture, which acts on the pressure on battery, remaining is same as Example 1.
Embodiment 4
A kind of chemical synthesizing method improving Soft Roll power battery cycle life provided in this embodiment, includes the following steps：
(a) the battery vacuum for completing fluid injection is stood, and the vacuum pressure that vacuum is stood is divided into 4 echelons, each echelon it is true
Pneumatics power is -45kPa, -65kPa, -80kPa and -90kPa, and the time of repose of each echelon is 30s；
Vacuum carries out vacuum seal after standing, the vacuum pressure of vacuum seal is -80kPa；
Step (b)-(d) is same as Example 1, and for details, reference can be made to embodiments 1.
Embodiment 5
A kind of chemical synthesizing method improving Soft Roll power battery cycle life provided in this embodiment, in addition to being adopted in step (b)
The temperature that pressure is stood is 60 DEG C, remaining step is same as Example 1.
Embodiment 6
A kind of chemical synthesizing method improving Soft Roll power battery cycle life provided in this embodiment, step (c) are by pressure
After standing and the battery that is placed in Battery formation fixture is into line precharge processing, as follows：
C1, standing；
C2, with 0.03C constant-current charge 10min, upper limit voltage 3900mV；
C3, with 0.1C constant-current charge 60min, upper limit voltage 3900mV；
C4, with 0.2C constant-current charge 80min, upper limit voltage 3900mV；
C5, terminate to precharge, detect voltage；
Remaining step (a), (b) and (d) it is same as Example 1.
Comparative example 1
The chemical synthesizing method for a kind of raising Soft Roll power battery cycle life that this comparative example provides, in addition to step (b)-(d)
In do not use Battery formation fixture, remaining step is same as Example 1.
Comparative example 2
This comparative example provide a kind of raising Soft Roll power battery cycle life chemical synthesizing method, in addition in step (b) not
Using Battery formation fixture, remaining step is same as Example 1.
Comparative example 3
This comparative example provide a kind of raising Soft Roll power battery cycle life chemical synthesizing method, in addition in step (c) not
Using Battery formation fixture, remaining step is same as Example 1.
Comparative example 4
This comparative example provide a kind of raising Soft Roll power battery cycle life chemical synthesizing method, in addition in step (d) not
Using Battery formation fixture, remaining step is same as Example 1.
Comparative example 5
The chemical synthesizing method for a kind of raising Soft Roll power battery cycle life that this comparative example provides, in addition to step (b)-(d)
It is 200 kilograms that middle Battery formation fixture, which acts on the pressure on battery, remaining step is same as Example 1.
Comparative example 6
The chemical synthesizing method for a kind of raising Soft Roll power battery cycle life that this comparative example provides, in addition to step (b)-(d)
It is 600 kilograms that middle Battery formation fixture, which acts on the pressure on battery, remaining step is same as Example 1.
Comparative example 7
The chemical synthesizing method for a kind of raising Soft Roll power battery cycle life that this comparative example provides, in addition to not using step
(d) outside, remaining step is same as Example 1.
It should be noted that the Battery formation fixture employed in embodiment 1-6 and comparative example 1-7, including first clamping plate,
Second clamping plate and clip, first clamping plate, second clamping plate and clip are to be detachably connected, the material of first clamping plate and second clamping plate
Matter is tempered glass；
In use, after first clamping plate, second clamping plate are respectively placed in the upper and lower surface of battery, the first folder is clamped with clip
Plate, second clamping plate, you can realize clamping of the Battery formation fixture to battery.
Further to verify the effect of above-described embodiment and comparative example, ad hoc following experimental example.
Experimental example 1
To carrying out electricity using obtained Soft Roll power battery after embodiment 1-6 and the chemical synthesizing method of comparative example 1-7 offers
Chemical property is analyzed, and concrete outcome is shown in Table 1.
The performance parameter for the Soft Roll power battery that table 1 is obtained using embodiment 1-6 and comparative example 1-7 chemical synthesizing methods
The electrochemistry of the battery obtained using chemical synthesizing method provided in an embodiment of the present invention it can be seen from data in table 1
Performance will integrally be better than the chemical property of the battery obtained using the chemical synthesizing method that comparative example provides.
Specifically, embodiment 2-3, comparative example 5-6 are the control experiment of embodiment 1, several persons are the difference is that battery
Battery formation clamp acts on the difference of the pressure on battery.Battery formation fixture acts on the hypotony on battery, it is not easy to fully
Gas and gap between battery pole piece and diaphragm are excluded, and Battery formation fixture acts on the hypertonia on battery, is unfavorable for
Battery electrolyte adsorbs in positive/negative plate and diaphragm, reduces ionic conductivity, and the pressure pretended on battery surface is answered
Control is in specific numberical range.
Embodiment 4 is the control experiment of embodiment 1, and the two is the difference is that vacuum pressure is divided into step (a)
Echelon is different.As it can be seen that when vacuum echelon is 4 or 5, the influence for the chemical property of battery is little.
Comparative example 1-4 is the contrast experiment of embodiment 1, the difference is that Battery formation fixture is in different step
No use.When (right not using Battery formation fixture in any one step in step (b)-(d) it can be seen from data in table 1
Answer comparative example 2-4) or step (b)-(d) in all steps do not use Battery formation fixture (corresponding comparative example 1), battery
There is different degrees of decline in chemical property parameter.As it can be seen that battery is clamped in Battery formation fixture, be conducive to electricity
The promotion of pond chemical property.
Experimental example 2
In order to further verify influence of the chemical synthesizing method provided by the invention for battery cycle life and discharge capacity,
Herein only by taking embodiment 6 and comparative example 1 as an example, the obtained cycle performance of battery and discharge capacity are measured, specifically
As a result see Fig. 6 and Fig. 7.
It can be found out respectively by Fig. 6 and Fig. 7, the circulating battery number of the embodiment of the present invention 6 is substantially higher in comparative example 1,
The 1C discharge capacities of embodiment 6 are also substantially higher in comparative example 1.As it can be seen that chemical synthesizing method provided by the invention can effectively improve it is soft
The cycle life of packet power battery improves the discharge capacity of Soft Roll power battery.Through many experiments the result shows that, using the present invention
The cycle of the chemical synthesizing method of offer, battery can promote 20~50%, and battery capacity can be improved 1~3%.In conclusion of the invention
The chemical synthesizing method of the Soft Roll power battery of offer can effectively improve Soft Roll power battery cycle life, and this method is Soft Roll power electric
The production in pond provides foundation.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of chemical synthesizing method improving Soft Roll power battery cycle life, which is characterized in that include the following steps：
(a) the battery vacuum for completing fluid injection is stood, and used vacuum pressure is reduced step by step by echelon, and vacuum carries out after standing
Vacuum seal；
(b) battery after vacuum seal is placed in Battery formation fixture and is aged, the mode of ageing stands for pressure；
(c) after standing pressure and the battery that is placed in Battery formation fixture is into line precharge processing, until precharge terminates；
(d) battery standing that precharge is terminated and is placed in Battery formation fixture, i.e. chemical conversion terminate；
Wherein, in step (b)-(d), it is 300~500 kilograms that Battery formation fixture, which acts on the pressure on battery,.
2. chemical synthesizing method according to claim 1, which is characterized in that in step (a), vacuum stand total time be 30~
150s, the vacuum pressure that vacuum is stood are -40~-90kPa, are divided into 3~5 echelons, and the vacuum pressure of each echelon presses echelon
It reduces step by step；
Preferably, the vacuum pressure that vacuum is stood is divided into 5 echelons, the vacuum pressure of each echelon be followed successively by -40~-45kPa, -
The time of repose of 50~-55kPa, -65~-75kPa, -80~-85kPa and -85~-90kPa, each echelon are 10~30s；
Preferably, the vacuum pressure of vacuum seal is -60~-80kPa, preferably -62~-75kPa, further preferably -65
~-72kPa.
3. chemical synthesizing method according to claim 1, which is characterized in that in step (b), the temperature that pressure is stood is 25~60
DEG C, preferably 28~60 DEG C, further preferably 30~55 DEG C；
Preferably, in step (b), the time that pressure is stood is 6~48h, preferably 7~46h, further preferably 8~45h.
4. chemical synthesizing method according to claim 1, which is characterized in that in step (c), the temperature of preliminary filling electric treatment is 35~
65 DEG C, preferably 36~62 DEG C, further preferably 38~60 DEG C；
Preferably, in step (c), when preliminary filling electric treatment, with 0.01~0.03C, 10~30min of constant-current charge, upper limit voltage is
3900mV；With 0.02~0.1C, 60~180min of constant-current charge, upper limit voltage 3900mV；With 0.05~0.3C constant-current charges 60
~180min, upper limit voltage 3900mV.
5. chemical synthesizing method according to claim 1, which is characterized in that in step (d), dwell temperature is 25~60 DEG C, excellent
It is selected as 28~60 DEG C, further preferably 30~55 DEG C；
Preferably, in step (d), time of repose is 2~10h, preferably 2.5~9.5h, further preferably 3~8h.
6. according to the chemical synthesizing method described in claim 1-5 any one, which is characterized in that the Battery formation fixture acts on
Pressure on battery is 300~480 kilograms；
Preferably, the cycle life of the Soft Roll power battery is promoted to 20~50%.
7. applied to the electricity in the chemical synthesizing method of the raising Soft Roll power battery cycle life described in claim 1-6 any one
Pond battery formation clamp, which is characterized in that the Battery formation fixture includes first clamping plate, second clamping plate and clip, and described
One clamping plate, second clamping plate and clip are to be detachably connected, and the first clamping plate and second clamping plate are cleat insulator, the card
Folder is elastic component；
The first clamping plate, second clamping plate are respectively placed in two surfaces of battery, battery is located at the first clamping plate and second
Between clamping plate, the first clamping plate and second clamping plate are clamped to apply pressure to battery with the clip.
8. Battery formation fixture according to claim 7, which is characterized in that the clip includes the first fixed part, second
Fixed part and the interconnecting piece for connecting the first fixed part and the second fixed part, one end of first fixed part and the second fixed part
It is connected with the interconnecting piece, the one end of first fixed part and the second fixed part far from interconnecting piece is both provided with crimping；
The distance between first fixed part and the second fixed part are adjustable, and first fixed part and the second fixed part can
The first clamping plate and second clamping plate surface are respectively acting on to apply pressure to battery；
Preferably, the first clamping plate and second clamping plate are tempered glass；
Preferably, the pressure that the Battery formation fixture acts on battery surface is 300~500 kilograms.
9. the chemical synthesizing method or claim 7 of the raising Soft Roll power battery cycle life described in claim 1-6 any one
Or application of the Battery formation fixture described in 8 in Soft Roll power battery production process.
10. a kind of Soft Roll power battery, which is characterized in that using the raising Soft Roll power described in claim 1-6 any one
The chemical synthesizing method of battery cycle life is made.
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| CN201810095451.6A CN108306062A (en) | 2018-01-31 | 2018-01-31 | Improve chemical synthesizing method, Battery formation fixture and application and the Soft Roll power battery of Soft Roll power battery cycle life |
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|---|---|---|---|
| CN201810095451.6A CN108306062A (en) | 2018-01-31 | 2018-01-31 | Improve chemical synthesizing method, Battery formation fixture and application and the Soft Roll power battery of Soft Roll power battery cycle life |
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