CN106129505A - A kind of compound method for lithium ion battery - Google Patents
A kind of compound method for lithium ion battery Download PDFInfo
- Publication number
- CN106129505A CN106129505A CN201610571657.2A CN201610571657A CN106129505A CN 106129505 A CN106129505 A CN 106129505A CN 201610571657 A CN201610571657 A CN 201610571657A CN 106129505 A CN106129505 A CN 106129505A
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- Prior art keywords
- battery core
- temperature
- room temperature
- chemical conversion
- battery
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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
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
A kind of compound method for lithium ion battery, comprises the following steps: the battery core that ageing terminates being put into and carry out high-temperature pressurizing chemical conversion in formation device, charge cutoff voltage is 3.5～3.8V；Under room temperature and fixation pressure, battery core is cooled down, make battery core temperature be down to room temperature；Battery core after cooling is placed in vacuum environment, the gasbag of battery core is punctured and bleeds, then sealing；Complete battery core of bleeding being put into and carry out high-temperature pressurizing chemical conversion in formation device, charge cutoff voltage is 3.9～4.5V；Cooling down battery core under room temperature and fixation pressure, make battery core temperature be down to room temperature, chemical conversion terminates.Present invention increase in hot pressing is melted into punctures the step that air bag is bled, and can get rid of reacting gas in time, thus effectively reduce battery core internal resistance, and two sub-high pressure room temperature cooling steps can improve lithium battery hardness, improve battery core flatness, improve lithium battery performance.
Description
Technical field
The invention belongs to technical field of lithium-ion battery, particularly relate to the chemical synthesizing method of a kind of lithium ion battery.
Background technology
Lithium ion battery will make positive and negative electrode material be swashed through formation process by formation process in process of production
Live, form SEI film vital to lithium battery performance, thus improve battery core chemical property.Current formation regime is main
There are two kinds: a kind of is to be melted into less electric current at normal temperatures, and small area analysis chemical conversion can fully ensure that the performance of lithium battery, but
Being that the chemical conversion time is longer, the relatively short time also wants ten several hours, as long as the even a couple of days having, seriously delays manufacturing schedule,
Production efficiency is low, causes production cost high: another kind is High Temperature High Pressure chemical conversion, it is simply that use battery core at high temperature under high pressure bigger
Electric current is melted into, and the chemical conversion time of this mode can be greatly shortened, it is only necessary to ten a few minutes, the longest the most only with several hours,
The battery core requirement to electrical property can be met, be greatly saved again the time, improve production efficiency, reduce production cost, high
Temperature high pressure formation regime is gradually promoted use.
High Temperature High Pressure big electric current chemical conversion (hot pressing chemical conversion) meets people to production efficiency and the requirement of production cost, but
Also other problem is brought.Battery core is melted at high temperature under high pressure, during occurring electrochemical reaction to form SEI film,
Often there is a lot of side reaction, thus produce more gas.If these gases can not be got rid of in time, enter inside battery core,
Will increase battery core internal resistance, impeded electrode reacts, and affects battery performance.Therefore, get rid of the most in time in High Temperature High Pressure chemical conversion and produce
Raw gas, becomes the difficult problem that current lithium electricity research worker is in the urgent need to address.
Summary of the invention
It is an object of the invention to provide a kind of gas by producing in eliminating formation process in time thus improve battery
The compound method for lithium ion battery of performance.
To achieve these goals, the present invention takes following technical solution:
A kind of compound method for lithium ion battery, comprises the following steps:
Step A, the battery core that ageing terminates being put into and carry out high-temperature pressurizing chemical conversion in formation device, charge cutoff voltage is
3.5～3.8V；
Step B, under room temperature and fixation pressure, battery core is cooled down, make battery core temperature be down to room temperature；
Step C, will cooling after battery core be placed in vacuum environment, the gasbag of battery core punctured and bleed, then sealing
Mouthful；
Step D, complete battery core of bleeding being put into and carry out high-temperature pressurizing chemical conversion in formation device, charge cutoff voltage is
3.9～4.5V；
Step E, cooling down battery core under room temperature and fixation pressure, make battery core temperature be down to room temperature, chemical conversion terminates.
More specifically, described step A is charged with the electric current of 0.05～0.5CmA during chemical conversion.
More specifically, the chemical conversion temperature in described step A and step D is 30～100 DEG C, and pressure is 0.01～10MPa.
More specifically, pressure when cooling down in described step B and step E is 0.01～10MPa.
More specifically, temperature when cooling down in described step B is 5～30 DEG C.
More specifically, the vacuum-95～-30KPa of vacuum environment in described step C.
More specifically, described step D is charged with the electric current of 0.2～3CmA during chemical conversion.
From above technical scheme, present invention increase in hot pressing is melted into punctures the step that air bag is bled, at aerogenesis relatively
After many first time chargings terminate, battery core is carried out clip and bleeds, reacting gas can be got rid of in time, improve the effect of secondary sealing
Rate, reduces battery core internal gas, thus effectively reduces battery core internal resistance, raising battery core hardness, and two sub-high pressure room temperature cooling steps can
To improve lithium battery hardness, improve battery core flatness, improve lithium battery performance, be particularly suited for great Bao battery core and barrier film cementability
Poor battery core.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention, will use required in embodiment or description of the prior art below
Accompanying drawing do simple introduction, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, for ability
From the point of view of the those of ordinary skill of territory, on the premise of not paying creative work, it is also possible to obtain the attached of other according to these accompanying drawings
Figure.
Fig. 1 is the flow chart of the inventive method.
Detailed description of the invention
In order to above and other objects of the present invention, feature and advantage can be become apparent from, the embodiment of the present invention cited below particularly,
And coordinate appended diagram, it is described below in detail.
The basic ideas of the inventive method are: the battery core that ageing terminates put in high-temperature pressurizing formation device and fill
Electricity, carries out room temperature cooling to battery core the most under a certain pressure, and the battery core that will drop to room temperature is put in vacuum environment, by gasbag
Puncturing, bleed, then seal, the battery core after sealing is placed again in high-temperature pressurizing formation device being charged, the most again
Secondary carrying out room temperature cooling under a certain pressure, until battery core is down to room temperature, chemical conversion completes.
It is above the core concept of the present invention, below in conjunction with the accompanying drawing in the embodiment of the present invention, to the embodiment of the present invention
Technical scheme be clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work
The every other embodiment obtained under premise, broadly falls into the scope of protection of the invention.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but the present invention is all right
Using other to be different from alternate manner described here to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
As it is shown in figure 1, the step of chemical synthesizing method of the present invention is as follows:
Step A, the battery core that ageing terminates is put into and is carried out high-temperature pressurizing chemical conversion in formation device, during chemical conversion with 0.05～
The electric current of 0.5CmA is charged, and charge cutoff voltage is 3.5～3.8V, chemical conversion temperature be 30～100 DEG C, pressure be 0.01～
10MPa；
Step B, under room temperature and certain pressure, battery core is cooled down, make battery core temperature be down to room temperature, pressure during cooling
Power is 0.01～10MPa, and temperature is 5～30 DEG C, and cool time is 30s～100min；
Step C, will cooling after battery core be placed in vacuum environment, the gasbag of battery core is punctured and bleeds, to get rid of electricity
Core inner gas, then seals；The vacuum-95～-30KPa of vacuum environment, uses the mode of pressurization and air extracting, punctures air bag
Bleeding or bleed air bag shear angle, the pressure of air-extractor is 0.1～3MPa；
Step D, it is placed again in formation device being charged with the electric current of 0.2～3CmA by complete battery core of bleeding, fills
Electricity blanking voltage is 3.9～4.5V, and chemical conversion temperature is 30～100 DEG C, and pressure is 0.01～10MPa；
Step E, cooling down battery core under room temperature and certain pressure, make battery core temperature be down to room temperature, chemical conversion terminates, cold
But pressure time is 0.01～10MPa, and temperature is 5～30 DEG C.
With a specific embodiment, the chemical synthesizing method of the lithium ion battery of the present invention is described in detail below:
Prepare the positive and negative electrode of battery core according to conventional preparation technology, positive and negative electrode and membrane coil are coiled into battery core, then by pole
Ear puts into battery container after welding with pole piece, after sealing, injects the electrolyte in battery container, then carries out old by battery
Change；
The battery core that ageing terminates is put into temperature be 70 DEG C, pressure be 0.46Mpa formation device in carry out high-temperature pressurizing
Chemical conversion, is charged with the electric current of 0.2CmA, charges to blanking voltage 3.7V；
Under the pressure of 0.38Mpa, battery core is carried out room temperature cooling, until battery core temperature reduces to room temperature；
Battery core after cooling is punctured and bled, and vacuum-80KPa, pressurization clip bleeds, pressure 0.5MPa, sealing；
Battery core being reentered in formation device, temperature, pressure are constant, are charged with the electric current of 0.5CmA, charge to
Blanking voltage 4.0V；
Under the pressure of 0.38Mpa, battery core is carried out room temperature cooling, until battery core temperature reduces to room temperature；Chemical conversion terminates.
Take above-mentioned same chemical synthesis technology, but in formation process, do not carry out puncturing pump step, prepare comparative example, will
The battery being aged put into temperature be 70 DEG C, pressure be 0.46Mpa formation device in carry out high-temperature pressurizing chemical conversion, during charging first
Use 0.2CmA electric current to be charged, charge to blanking voltage 3.7V, after arriving blanking voltage, continue to carry out with 0.5CmA electric current
Charging, charges to blanking voltage 4.0V, then under the pressure of 0.38Mpa, battery core is carried out room temperature cooling, until battery core temperature fall
For room temperature, chemical conversion terminates.Bleed owing to air bag need not be punctured, the preparation technology of comparative example between twice charging process not
There is cooling step.
The battery core that battery core embodiment prepared and comparative example prepare carries out hardness, flatness and internal resistance and surveys
Examination, by battery core surface is applied power during hardness test, observes whether battery core can feel like jelly deformation；Testing flatness is that battery core is solid
After reserving, the battery core thickness of several positions in test battery core, check the change of the thickness of each position, thus differentiate that battery core is put down
Whole degree；Inner walkway uses voltage internal resistance test device to test, and above test all uses the means of testing of routine.Test result
As shown in table 1:
Table 1
By the result of table 1 it can be seen that relative to existing High Temperature High Pressure big electric current chemical synthesis technology, right in formation process
Battery core carries out puncturing bleeding, and can preferably remove internal gas so that every electrical property of battery core all has lifting, and increases
Twice normal temperature high voltage cooling, battery core flatness is more preferable, and hardness is the most preferably strengthened.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to embodiment illustrated herein, and is to fit to consistent with principles disclosed herein and features of novelty
Widest range.
Claims (7)
1. a compound method for lithium ion battery, it is characterised in that comprise the following steps:
Step A, the battery core that ageing terminates is put into and is carried out high-temperature pressurizing chemical conversion in formation device, charge cutoff voltage be 3.5～
3.8V；
Step B, under room temperature and fixation pressure, battery core is cooled down, make battery core temperature be down to room temperature；
Step C, will cooling after battery core be placed in vacuum environment, the gasbag of battery core punctured and bleed, then sealing；
Step D, complete battery core of bleeding is put into formation device carries out high-temperature pressurizing chemical conversion, charge cutoff voltage be 3.9～
4.5V；
Step E, cooling down battery core under room temperature and fixation pressure, make battery core temperature be down to room temperature, chemical conversion terminates.
Compound method for lithium ion battery the most according to claim 1, it is characterised in that: in described step A chemical conversion time with
The electric current of 0.05～0.5CmA is charged.
Compound method for lithium ion battery the most according to claim 1, it is characterised in that: the change in described step A and step D
Becoming temperature is 30～100 DEG C, and pressure is 0.01～10MPa.
Compound method for lithium ion battery the most according to claim 1, it is characterised in that: described step B and step E cool down
Time pressure be 0.01～10MPa.
5. according to the compound method for lithium ion battery described in claim 1 or 4, it is characterised in that: when described step B cools down
Temperature is 5～30 DEG C.
Compound method for lithium ion battery the most according to claim 1, it is characterised in that: vacuum environment in described step C
Vacuum-95～-30KPa.
Compound method for lithium ion battery the most according to claim 1, it is characterised in that: with 0.2 during chemical conversion in described step D
～the electric current of 3CmA is charged.
Priority Applications (1)
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|---|---|---|---|
| CN201610571657.2A CN106129505A (en) | 2016-07-19 | 2016-07-19 | A kind of compound method for lithium ion battery |
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| CN201610571657.2A CN106129505A (en) | 2016-07-19 | 2016-07-19 | A kind of compound method for lithium ion battery |
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Family
ID=57289216
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946661A (en) * | 2017-11-17 | 2018-04-20 | 中山市电赢科技有限公司 | A kind of cell manufacturing method for improving battery high-temperature storage performance |
| CN109216809A (en) * | 2017-07-08 | 2019-01-15 | 深圳格林德能源有限公司 | A kind of polymer Li-ion battery pressure chemical synthesis technology |
| CN109755652A (en) * | 2017-11-06 | 2019-05-14 | 汽车能源供应公司 | The pressure method and manufacturing method of film cased battery |
| CN109962295A (en) * | 2017-12-14 | 2019-07-02 | 宝山钢铁股份有限公司 | A kind of temperature-control pressure-control formula formation of Li-ion batteries method |
| CN110998961A (en) * | 2018-03-21 | 2020-04-10 | 株式会社Lg化学 | Method of manufacturing lithium secondary battery and lithium secondary battery manufactured thereby |
| CN111497681A (en) * | 2020-04-29 | 2020-08-07 | 重庆金康动力新能源有限公司 | Variable SOC charging system and method for electric automobile |
| CN114628791A (en) * | 2022-01-29 | 2022-06-14 | 北京新能源汽车股份有限公司 | Battery cell, method for improving high-temperature performance of battery cell, battery and new energy vehicle |
| CN114824430A (en) * | 2022-07-01 | 2022-07-29 | 江苏时代新能源科技有限公司 | Method and device for adjusting flatness of battery case and battery manufacturing system |
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| CN114628791A (en) * | 2022-01-29 | 2022-06-14 | 北京新能源汽车股份有限公司 | Battery cell, method for improving high-temperature performance of battery cell, battery and new energy vehicle |
| CN114824430A (en) * | 2022-07-01 | 2022-07-29 | 江苏时代新能源科技有限公司 | Method and device for adjusting flatness of battery case and battery manufacturing system |
| CN114824430B (en) * | 2022-07-01 | 2022-11-15 | 江苏时代新能源科技有限公司 | Method and device for adjusting flatness of battery case and battery manufacturing system |
| WO2024000857A1 (en) * | 2022-07-01 | 2024-01-04 | 江苏时代新能源科技有限公司 | Battery shell flatness adjustment method and device, and battery manufacturing system |
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Application publication date: 20161116 |