CN110534832A - A method of removal dismantling lithium battery electrolytes - Google Patents
A method of removal dismantling lithium battery electrolytes Download PDFInfo
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- CN110534832A CN110534832A CN201910749938.6A CN201910749938A CN110534832A CN 110534832 A CN110534832 A CN 110534832A CN 201910749938 A CN201910749938 A CN 201910749938A CN 110534832 A CN110534832 A CN 110534832A
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- solution
- lithium battery
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- battery core
- electrolyte
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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
- H01M10/54—Reclaiming serviceable parts of waste accumulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
Abstract
The present invention relates to a kind of methods of removal dismantling lithium battery electrolytes, include the following steps: to be disassembled to obtain the battery core with electrolyte to waste and old lithium battery；Battery core with electrolyte is put into the consistent solution of electrolyte internal solvent ingredient and is impregnated and is eluted, repetitive cycling is multiple；After the completion of soaking, elution, then battery core is put into excessive NaOH solution and carries out secondary cleaning, to remove lithium salts remaining on electrode；Battery core after secondary cleaning is dried, the battery core of dried and clean is obtained.The invention has the benefit that being cleaned using with the consistent solution of electrolyte internal solvent ingredient, it not only can guarantee cleaning effect, and other chemical reactions will not occur, to ensure not introduce remaining impurity, the solution composition of wash-off is consistent with electrolyte, can be directly as the raw material of production cell solution, the chemical reaction for not needing to carry out subsequent complexity goes to be handled, method is simple, and equipment investment is small, is suitable for industrial application.
Description
Technical field
The present invention relates to lithium battery electrolytes process fields, and in particular to a kind of side of removal dismantling lithium battery electrolytes
Method.
Background technique
As destruction problem of the orthodox car exhaust emissions to environment is increasingly prominent, energy storage and low-speed electronic vehicle are obtained quickly
Development, the usage amount of lithium battery increases rapidly, but the service life of lithium battery is limited, and lithium battery that is retired or scrapping is badly in need of
It is recycled.By 2018, the learies of lithium battery had reached 24.1 ten thousand tons, and wherein total learies of power battery are
7.4 ten thousand tons, the recycling of lithium battery inevitably needs to disassemble battery, and the processing of electrolyte is always a spine
The problem of hand.
Mainly divide two methods to the recovery processing of waste lithium cell electrolyte on the market at present: one is pyrogenic attack,
Electrolyte organic solvent is volatilized or burnt, processing tail gas, this method equipment are absorbed by active carbon and lye after then exchanging heat
Cost is larger, and the active carbon after absorption belongs to dangerous waste, and processing difficulty is big；Another kind is CO2Supercritical extraction, this method is still
The experimental stage is rested on, equipment energy consumption is larger, is not particularly suited for the application of industrialization, scale.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of methods of removal dismantling lithium battery electrolytes, on overcoming
State deficiency in the prior art.
The technical scheme to solve the above technical problems is that a kind of method of removal dismantling lithium battery electrolytes,
Include the following steps:
S100: waste and old lithium battery is disassembled to obtain the battery core with electrolyte；
S200: by with electrolyte battery core be put into carried out in the consistent solution of electrolyte internal solvent ingredient impregnate and
Elution, repetitive cycling are multiple；
S300: after the completion of soaking, elution, then battery core is put into excessive NaOH solution and carries out secondary cleaning, to go
Except lithium salts remaining on electrode；
S400: being dried the battery core after secondary cleaning, obtains the battery core of dried and clean.
The beneficial effects of the present invention are: being cleaned using with the consistent solution of electrolyte internal solvent ingredient, can not only protect
Cleaning effect is demonstrate,proved, and other chemical reactions will not occur, to ensure not introduce remaining impurity, the solution composition of wash-off and electrolysis
Liquid is consistent, can go to be handled directly as the raw material of production cell solution, the chemical reaction for not needing to carry out subsequent complexity,
Method is simple, and equipment investment is small, is suitable for industrial application.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the S100 is specific as follows:
S110, waste and old lithium battery is impregnated in salt water or safe voltage or less is discharged to by loaded method；
S120, the lithium battery after electricity is picked and placed, carries out flexible dismantling, removed tab and shell obtains the electricity with electrolyte
Core.
It is using above-mentioned further beneficial effect: prevents subsequent on fire when being disassembled to lithium battery.
It further, is dimethyl carbonate solution with the consistent solution of electrolyte internal solvent ingredient in the S200.
Further, soaking time is 30min~50min in the S300.
Further, by the way of adverse current, circulation, used liquid is soaking, filtered for elution in the S300
Solution, time are 10min~25min.
It is using above-mentioned further beneficial effect: washs filtered solution composition and battery electrolyte main component one
It causes, can be used as a kind of byproduct for producing lithium battery electrolytes after deploying component ratio, save and be processed into
This.
Further, the S400 is specific as follows:
Battery core after secondary cleaning is placed into closed heating air-drying box and is dried, obtains the electricity of dried and clean
Core.
Further, dry temperature is 90 DEG C~120 DEG C, and the time is 10min~20min.
Further, the solution in S300 after NaOH solution is cleaned is collected, acid solution is added and neutralizes, adjusts the PH to 10 of solution
~12, it is added Ca (OH)2Solution, evaporation and concentration obtain LiOH precipitating.
It is using above-mentioned further beneficial effect: lithium can be recycled, sufficiently saved resource.
Further, Ca (OH)2The weak solution that solution is 10%~30%.
Further, the temperature of evaporation and concentration is 130 DEG C~160 DEG C.
Detailed description of the invention
Fig. 1 is the flow chart of the method for removal dismantling lithium battery electrolytes of the present invention.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Embodiment 1
As shown in Figure 1, a kind of method of removal dismantling lithium battery electrolytes, includes the following steps:
S100: waste and old lithium battery is disassembled to obtain the battery core with electrolyte；
S100 is specific as follows:
S110, waste and old lithium battery is impregnated in salt water or safe voltage or less is discharged to by loaded method；
S120, the lithium battery after electricity is picked and placed, flexible dismantling is carried out under the protection of inert gas, removed tab and shell obtains
To the battery core for having electrolyte；
S200: by with electrolyte battery core be put into carried out in the consistent solution of electrolyte internal solvent ingredient impregnate and
Elution, repetitive cycling is multiple, and soaking time is 30min~50min, by the way of elution is using adverse current, circulation, the liquid that uses for
Soaking, filtered solution, time are 10min~25min；
S300: after the completion of soaking, elution, then battery core is put into excessive NaOH solution and carries out secondary cleaning, to go
Except lithium salts remaining on electrode, NaOH solution is weak solution under normal conditions, and concentration is 10%~30%；
S400: being dried the battery core after secondary cleaning, obtains the battery core of dried and clean；
S400 is specific as follows:
Battery core after secondary cleaning is placed into dry with 90 DEG C~120 DEG C of temperature in closed heating air-drying box
10min~20min obtains the battery core of dried and clean.
It under normal conditions, is dimethyl carbonate (DMC) solution, carbonic acid diformazan with the consistent solution of electrolyte internal solvent ingredient
Ester (DMC) solution is colorless and transparent, slightly smell, low-toxicity green chemical products liquid, purity reaches 99% or more, have safety,
The advantages of good environmental protection.
Embodiment 2
As shown in Figure 1, a kind of method of removal dismantling lithium battery electrolytes, includes the following steps:
S100: waste and old lithium battery is disassembled to obtain the battery core with electrolyte；
S100 is specific as follows:
S110, waste and old lithium battery is impregnated in salt water or safe voltage or less is discharged to by loaded method；
S120, the lithium battery after electricity is picked and placed, flexible dismantling is carried out under the protection of inert gas, removed tab and shell obtains
To the battery core for having electrolyte；
S200: by with electrolyte battery core be put into carried out in the consistent solution of electrolyte internal solvent ingredient impregnate and
Elution, repetitive cycling is multiple, and soaking time is 30min~50min, by the way of elution is using adverse current, circulation, the liquid that uses for
Soaking, filtered solution, time are 10min~25min；
S300: after the completion of soaking, elution, then battery core is put into excessive NaOH solution and carries out secondary cleaning, to go
Except lithium salts remaining on electrode, NaOH solution is weak solution under normal conditions, and concentration is collected molten through NaOH 10%~30%
Solution after liquid cleaning is added acid solution and neutralizes, adjust the PH to 10~12 of solution, is added Ca (OH)2Solution, with 130 DEG C~160
DEG C temperature be concentrated by evaporation, OH-Ion concentration gradually rises, and LiOH is precipitated, Ca (OH)2The weak solution that solution is 10%~30%；
S400: being dried the battery core after secondary cleaning, obtains the battery core of dried and clean；
S400 is specific as follows:
Battery core after secondary cleaning is placed into dry with 90 DEG C~120 DEG C of temperature in closed heating air-drying box
10min~20min obtains the battery core of dried and clean.
It under normal conditions, is dimethyl carbonate (DMC) solution, carbonic acid diformazan with the consistent solution of electrolyte internal solvent ingredient
Ester (DMC) solution is colorless and transparent, slightly smell, low-toxicity green chemical products liquid, purity reaches 99% or more, have safety,
The advantages of good environmental protection.
Application examples
It is illustrated for handling automobile power soft package lithium battery, the voltage of automobile power soft package lithium battery is 3.7v left
It is right；
A method of removal dismantling lithium battery electrolytes include the following steps:
S100: automobile power soft package lithium battery is discharged to safe voltage hereinafter, due to automobile by loaded method
The voltage of power soft package lithium battery can achieve safe voltage 1.4V in 3.7v or so, therefore repeatedly using load cycle electric discharge
Left and right, when dismantling, be not on fire, the lithium battery after picking and placing electricity, carries out flexible dismantling under the protection of inert gas, removal tab and
Shell obtains the battery core with electrolyte；
S200: the battery core with electrolyte being put into dimethyl carbonate (DMC) solution and is impregnated and is eluted, weight
Repeatedly, wherein impregnating is carried out in immersing in pond containing stainless steel filter screen, the immersion of dimethyl carbonate solution can for multiple circulation
To dissolve the electrolyte being wrapped in battery core pole piece and diaphragm out, filter residue be filled into sieve hereinafter, soaking time be 30min~
50min, elution using adverse current, circulation by the way of, used liquid be soaking, filtered solution, the time for 10min~
25min, the solution composition after wash-off is consistent with lithium battery electrolytes, directly as production cell solution raw material or byproduct,
The chemical reaction for not needing to carry out subsequent complexity goes to be handled；
S300: after the completion of soaking, elution, then battery core is put into excessive NaOH solution and carries out secondary cleaning, to go
Except lithium salts remaining on electrode, NaOH solution is weak solution under normal conditions, and concentration is collected molten through NaOH 10%~30%
Solution after liquid cleaning is added acid solution and neutralizes, adjust the PH to 10~12 of solution, is added Ca (OH)2Solution, with 130 DEG C~160
DEG C temperature be concentrated by evaporation to obtain LiOH precipitating, the available effective recycling of LiOH, Ca (OH)2Solution is 10%~30%
Weak solution；
S400: the battery core after secondary cleaning is placed into closed heating air-drying box and is done with 90 DEG C~120 DEG C of temperature
Dry 10min~20min obtains the battery core of dried and clean, and weighing discovery battery core weight change is 5% or so, without obviously pungent gas
Taste illustrates that electrolyte raffinate is effectively addressed.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of method of removal dismantling lithium battery electrolytes, which comprises the steps of:
S100: waste and old lithium battery is disassembled to obtain the battery core with electrolyte；
S200: by with electrolyte battery core be put into impregnated and drenched in the consistent solution of electrolyte internal solvent ingredient
It washes, repetitive cycling is multiple；
S300: after the completion of soaking, elution, then battery core is put into excessive NaOH solution and carries out secondary cleaning, to remove electricity
Extremely upper remaining lithium salts；
S400: being dried the battery core after secondary cleaning, obtains the battery core of dried and clean.
2. a kind of method of removal dismantling lithium battery electrolytes according to claim 1, which is characterized in that the S100 tool
Body is as follows:
S110, waste and old lithium battery is impregnated in salt water or safe voltage or less is discharged to by loaded method；
S120, the lithium battery after electricity is picked and placed, carries out flexible dismantling, removed tab and shell obtains the battery core with electrolyte.
3. a kind of method of removal dismantling lithium battery electrolytes according to claim 1, which is characterized in that in the S200
It is dimethyl carbonate solution with the consistent solution of electrolyte internal solvent ingredient.
4. a kind of method of removal dismantling lithium battery electrolytes according to claim 1, which is characterized in that in the S300
Soaking time is 30min~50min.
5. a kind of method of removal dismantling lithium battery electrolytes according to claim 1, which is characterized in that in the S300
By the way of adverse current, circulation, used liquid is soaking, filtered solution for elution, and the time is 10min~25min.
6. a kind of method of removal dismantling lithium battery electrolytes according to claim 1, which is characterized in that the S400 tool
Body is as follows:
Battery core after secondary cleaning is placed into closed heating air-drying box and is dried, obtains the battery core of dried and clean.
7. a kind of method of removal dismantling lithium battery electrolytes according to claim 1, which is characterized in that dry temperature
It is 90 DEG C~120 DEG C, the time is 10min~20min.
8. a kind of method of removal dismantling lithium battery electrolytes according to claim 1, which is characterized in that collect in S300
Solution after NaOH solution is cleaned is added acid solution and neutralizes, adjust the PH to 10~12 of solution, is added Ca (OH)2Solution, evaporation
It is concentrated to get LiOH precipitating.
9. a kind of method of removal dismantling lithium battery electrolytes according to claim 8, which is characterized in that Ca (OH)2Solution
For 10%~30% weak solution.
10. a kind of method of removal dismantling lithium battery electrolytes according to claim 8 or claim 9, which is characterized in that evaporation is dense
The temperature of contracting is 130 DEG C~160 DEG C.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600392A (en) * | 2015-01-30 | 2015-05-06 | 湖南省正源储能材料与器件研究所 | Method for recovering electrolyte of waste lithium ion battery |
| WO2016012941A1 (en) * | 2014-07-22 | 2016-01-28 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Method for recycling the electrolyte of a li-ion battery and method for recycling li-ion batteries |
| CN105720317A (en) * | 2016-04-28 | 2016-06-29 | 深圳市力为锂能科技有限公司 | Recycling method and apparatus for waste lithium ion battery |
| CN106025420A (en) * | 2016-08-11 | 2016-10-12 | 合肥国轩高科动力能源有限公司 | Method for recovering lithium hexafluorophosphate in waste lithium ion battery |
| CN106532170A (en) * | 2016-12-19 | 2017-03-22 | 重庆汉岳科技发展有限公司 | Resource recycling process for waste lithium batteries |
-
2019
- 2019-08-14 CN CN201910749938.6A patent/CN110534832A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016012941A1 (en) * | 2014-07-22 | 2016-01-28 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Method for recycling the electrolyte of a li-ion battery and method for recycling li-ion batteries |
| CN104600392A (en) * | 2015-01-30 | 2015-05-06 | 湖南省正源储能材料与器件研究所 | Method for recovering electrolyte of waste lithium ion battery |
| CN105720317A (en) * | 2016-04-28 | 2016-06-29 | 深圳市力为锂能科技有限公司 | Recycling method and apparatus for waste lithium ion battery |
| CN106025420A (en) * | 2016-08-11 | 2016-10-12 | 合肥国轩高科动力能源有限公司 | Method for recovering lithium hexafluorophosphate in waste lithium ion battery |
| CN106532170A (en) * | 2016-12-19 | 2017-03-22 | 重庆汉岳科技发展有限公司 | Resource recycling process for waste lithium batteries |
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Application publication date: 20191203 |
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