阅读说明：本技术 一种锂电池的制备方法 (A kind of preparation method of lithium battery ) 是由 武建军 于 2019-08-21 设计创作，主要内容包括：本发明属于锂电池技术领域,尤其是一种锂电池的制备方法,包括以下步骤：S1：取10-15L之间的量杯放置在室内温度为18-23℃之间,室内湿度为35％-55％之间的室内环境中进行操作；S2：将8-12L的碳酸乙烯酯以及4-8L碳酸二乙酯倒入到量杯中,并进行搅拌9-13min；S3：将70-95㎎碳酸甲乙酯倒入到量杯中快速搅拌3-5min,搅拌完毕之后,将其静置10-26min；S4：使用密封盖将量杯中的开口进行封堵,而密封盖上设置有单向阀,然后使用气泵将碳酸丙烯酯气体通入到量杯中,在通入到2-3min之后,对量杯摇晃5-8min；S6：过完筛子后的粉末状的碳酸二甲投入到量杯中,然后对量杯中的溶液进行搅拌9-13min。本发明制备步骤少,操作简单,同时提高了电池电解液的稳定性能,有效的提高了锂电池安全性能。(The invention belongs to technical field of lithium batteries, especially a kind of preparation method of lithium battery, comprising the following steps: S1: taking the measuring cup between 10-15L to be placed on room temperature is between 18-23 DEG C, and indoor humidity is operated in the indoor environment between 35%-55%；S2: the ethylene carbonate of 8-12L and 4-8L diethyl carbonate are poured into measuring cup, and are stirred 9-13min；S3: 70-95 ㎎ methyl ethyl carbonate being poured into measuring cup and quickly stirs 3-5min, after stirring finishes, is stood 10-26min；S4: the opening in measuring cup is blocked using sealing cover, and is provided with check valve on sealing cover, then propene carbonate gas is passed into measuring cup using air pump, after being passed into 2-3min, 5-8min is rocked to measuring cup；S6: the powdered carbonic acid diformazan after excessively complete sieve is put into measuring cup, is then stirred 9-13min to the solution in measuring cup.Preparation step of the present invention is few, easy to operate, while improving the stability of battery electrolyte, effectively raises lithium battery security performance.)

1. a kind of preparation method of lithium battery, comprising the following steps:

S1: taking the measuring cup between 10-15L to be placed on room temperature is between 18-23 DEG C, and indoor humidity is between 35%-55% Indoor environment in operated；

S2: the ethylene carbonate of 8-12L and 4-8L diethyl carbonate are poured into measuring cup, and are stirred 9-13min；

S3: 70-95 ㎎ methyl ethyl carbonate being poured into measuring cup and quickly stirs 3-5min, after stirring finishes, is stood 10- 26min；

S4: being blocked the opening in measuring cup using sealing cover, and be provided with check valve on sealing cover, then uses air pump will Propene carbonate gas is passed into measuring cup, after being passed into 2-3min, rocks 5-8min to measuring cup；

S5: solid carbonic acid dimethyl ester 12-21 ㎎ is pulverized, pulverizes and sieves 15-25 mesh sieve after finishing；

S6: the powdered carbonic acid diformazan after excessively complete sieve is put into measuring cup, is then stirred 9- to the solution in measuring cup 13min；

S7: powdered 15-23 ㎎ lithium hexafluoro phosphate and 28-37 ㎎ phosphorus pentafluoride are put into measuring cup, are first carried out quick 1-3min is rocked, stands 2-6min, then slowly rocked 10-15 minutes；

S8: flame-retardant additive, redox shuttle additive and protection positive and negative anodes film for additive are added in measuring cup and are mixed Stirring is just configured as electrolyte；

S9: taking battery case to be placed on is on testing stand, and battery case material is predominantly plated nickel element and is made, on battery case It is provided with the positive electrode, the negative electrode and the separator；

S10: injecting the electrolyte into battery case, and lithium battery has just been made at this time.

2. a kind of preparation method of lithium battery according to claim 1, which is characterized in that in the S1, measuring cup is transparent Glass material is made, and visual containing mark is provided in measuring cup.

3. a kind of preparation method of lithium battery according to claim 1, which is characterized in that in the S2, utilize rubber bar When solution in measuring cup is mixed, and ceaselessly stirred when stirring according to a direction clockwise.

4. a kind of preparation method of lithium battery according to claim 1, which is characterized in that in the S3, when using quick When agitating mode is stirred the solution in its measuring cup, needs to reach 90-150 circle moving rubber bar per minute and stirred.

5. a kind of preparation method of lithium battery according to claim 1, which is characterized in that in the S4, the sealing cover On be provided with pressure gauge, and pressure gauge can show the pressure in measuring cup.

6. a kind of preparation method of lithium battery according to claim 1, which is characterized in that in the S5, by solid carbonic acid Dimethyl ester is placed on clean blank sheet of paper, then wraps up it blank sheet of paper, and operator can utilize waddy by solid at this time Dimethyl carbonate, which push repeatedly, to be pulverized.

7. a kind of preparation method of lithium battery according to claim 1, which is characterized in that in the S6, in measuring cup When configuring solution stirring, until the carbonic acid diformazan of the powder in measuring cup is adequately melted.

8. a kind of preparation method of lithium battery according to claim 1, which is characterized in that, will be powdered in the S7 25-31 ㎎ lithium hexafluoro phosphate and 30-35 ㎎ phosphorus pentafluoride are put into measuring cup, are first carried out quickly rocking 1-2min, are stood 2- 5min, then slowly rocked 10-12 minutes；

The preparation method of a kind of lithium battery according to claim 1, which is characterized in that in the S9, battery case makes With preceding, it need to be cleaned, dried and be sterilized.

Technical field

The present invention relates to technical field of lithium batteries more particularly to a kind of preparation methods of lithium battery.

Background technique

It by lithium metal or lithium alloy is negative electrode material, using the battery of non-aqueous electrolytic solution that lithium battery, which is a kind of,.1912 Year lithium metal battery is proposed and is studied by Gilbert N. Lewis earliest.When the 1970s, M. S. Whittingham It proposes and the lithium ion battery that begins one's study.Since the chemical characteristic of lithium metal is very active so that the processing of lithium metal, preservation, It uses, it is very high to environmental requirement.With the development of science and technology, present lithium battery has become mainstream.

For existing lithium battery during preparation, preparation step is more, complicated for operation, while security performance is low, has The unstable factor for endangering the safety of people, does not meet the growth requirement of modern society, so we have proposed a kind of lithium batteries Preparation method, to solve above-mentioned proposed exterior problem.

Summary of the invention

The purpose of the present invention is to solve a kind of lithium batteries that the prior art exists in the prior art, and proposes Preparation method.

To achieve the goals above, present invention employs following technical solutions:

A kind of preparation method of lithium battery, comprising the following steps:

S1: taking the measuring cup between 10-15L to be placed on room temperature is between 18-23 DEG C, and indoor humidity is between 35%-55% Indoor environment in operated；

S2: the ethylene carbonate of 8-12L and 4-8L diethyl carbonate are poured into measuring cup, and are stirred 9-13min；

S3: 70-95 ㎎ methyl ethyl carbonate being poured into measuring cup and quickly stirs 3-5min, after stirring finishes, is stood 10- 26min；

S4: being blocked the opening in measuring cup using sealing cover, and be provided with check valve on sealing cover, then uses air pump will Propene carbonate gas is passed into measuring cup, after being passed into 2-3min, rocks 5-8min to measuring cup.

S5: solid carbonic acid dimethyl ester 12-21 ㎎ is pulverized, pulverizes and sieves 15-25 mesh sieve after finishing；

S6: the powdered carbonic acid diformazan after excessively complete sieve is put into measuring cup, is then stirred 9- to the solution in measuring cup 13min；

S7: powdered 15-23 ㎎ lithium hexafluoro phosphate and 28-37 ㎎ phosphorus pentafluoride are put into measuring cup, are first carried out quick 1-3min is rocked, stands 2-6min, then slowly rocked 10-15 minutes；

S8: flame-retardant additive, redox shuttle additive and protection positive and negative anodes film for additive are added in measuring cup and are mixed Stirring is just configured as electrolyte；

S9: taking battery case to be placed on is on testing stand, and battery case material is predominantly plated nickel element and is made, on battery case It is provided with the positive electrode, the negative electrode and the separator；

S10: injecting the electrolyte into battery case, and lithium battery has just been made at this time.

Preferably, in the S1, measuring cup is made of transparent glass material, and visual containing mark is provided in measuring cup.

Preferably, in the S2, when the solution in measuring cup being mixed using rubber bar, and according to suitable when stirring It ceaselessly stirs in one direction of hour hands.

Preferably, it in the S3, when being stirred the solution in its measuring cup using quick agitating mode, needs to reach 90-150 circle moving rubber bar per minute is stirred.

Preferably, in the S4, pressure gauge is provided on the sealing cover, and pressure gauge can show the pressure in measuring cup Power.

Preferably, in the S5, solid carbonic acid dimethyl ester is placed on clean blank sheet of paper, then carries out blank sheet of paper to it Package, solid carbonic acid dimethyl ester can push repeatedly and be pulverized by operator using waddy at this time.

Preferably, in the S6, when to solution stirring is configured in measuring cup, until by the carbonic acid diformazan of the powder in measuring cup Adequately melted.

Preferably, in the S7, by powdered 25-31 ㎎ lithium hexafluoro phosphate and the 30-35 ㎎ phosphorus pentafluoride amount of putting into In cup, first carries out quickly rocking 1-2min, stand 2-5min, then slowly rocked 10-12 minutes.

Preferably, in the S9, battery case is before use, need to be cleaned, dried and be sterilized.

In the present invention, when may insure inside battery thermal runaway using flame-retardant additive, electrolyte will not burn on fire, make Battery security is guaranteed.

In the present invention, the effect using redox shuttle additive be prevent when battery especially power battery pack by It is abnormal in being in the presence of in use.

In the present invention, battery regular can overcharge or over-discharge, so as to cause the rapid deterioration of battery performance, and then influences whole The performance and use of group battery, or even the generation of security risk is brought, the effect using positive and negative anodes film for additive is that can have Effect ground protection positive and negative pole material in the charge state with the haptoreaction of electrolyte, by way of film forming, by high activity Positive and negative anodes electrolyte is kept apart, to prevent electrolyte in the reaction of electrode surface.

In the present invention, ethylene carbonate clear colorless liquid (> 35 DEG C) is crystalline solid when room temperature, boiling point: 248 DEG C/ 760mmHg, 243-244 DEG C/740mmHg；Flash-point: 160 DEG C；Density: 1.3218；Index of refraction: 1.4158 (50 DEG C)；Fusing point: 35-38℃；This product is the good solvent of polyacrylonitrile, polyvinyl chloride, can be used as the liquid that reels off raw silk from cocoons in weaving；It can also be directly as de- Except the solvent of sour gas and the additive of concrete；It can be used as the component and raw material of pharmacy in medicine；Also act as plastics The stabilizer of foaming agent and synthetic lubricant fluid；On battery industry, the fine solvent of lithium battery electrolytes can be used as.

In the present invention, the colourless odorlessness of propene carbonate or light yellow transparent liquid are dissolved in water and carbon tetrachloride, with second Ether, acetone, benzene etc. is miscible, is a kind of excellent polar solvent, this product be mainly used for high score subjob, gas separating technology and Electrochemistry is especially used to absorb natural gas, petrochemical plant synthetic ammonia feedstock carbon dioxide therein, also acts as plasticizer, spins Silk solvent, alkene and aromatic hydrocarbons extraction agent etc..

In the present invention, diethyl carbonate colourless liquid, slightly smell；1.33kPa/23.8 DEG C of vapour pressure；25 DEG C of flash-point (can Burning liquid, which can volatilize, becomes steam, runs in air, and temperature increases, and volatilization is accelerated, when the steam of volatilization and the mixture of air Contacted with fire source when can lighten spark, this of short duration combustion process be called flash burn, the minimum temperature of generation flash burn Flash-point is done, flash-point is lower, causes the risk of fire bigger)；- 43 DEG C of fusing point；125.8 DEG C of boiling point；Dissolubility: it is not soluble in water, It is miscible in most organic solvents such as alcohol, ketone, ester；Density: relative density (water=1) 1.0；Relative density (air=1) 4.07；Surely It is qualitative: to stablize；Risk markings 7 (flammable liquid)；Main application: being used as solvent and is used for organic synthesis.

In the present invention, dimethyl carbonate is a kind of industrial chemicals nontoxic, environmental-protecting performance is excellent, widely used, it is one Important organic synthesis intermediate is planted, contains the functional groups such as carbonyl, methyl and methoxyl group in molecular structure, there are a variety of reactivity Can, have the characteristics that in production using conveniently, safely, pollution less, be easy transport.

In the present invention, methyl ethyl carbonate colourless transparent liquid, 107 DEG C of boiling point, -14 DEG C of fusing point, be the height of rising in recent years Science and technology, the chemical products of high added value, a kind of solvent of excellent lithium-ion battery electrolytes, is with dimethyl carbonate and lithium The last word that ion battery yield increases and extends has dimethyl carbonate, carbon concurrently since it possesses methyl and ethyl simultaneously Diethyl phthalate characteristic, and the solvent of extraordinary fragrance and intermediate, due to the disequilibrium of the first and second bases, the product is unstable, no It is suitable for long term storage.

In the present invention, lithium hexafluoro phosphate white crystals or powder, relative density 1.50, hygroscopy is strong；It is soluble easily in water, also molten Decomposed in the organic solvents such as low concentration methanol, ethyl alcohol, acetone, carbonates, exposure air or when heating, in exposure air or Lithium hexafluoro phosphate is decomposed rapidly due to the effect of vapor in air when heating, is released PF5 and is generated white smoke.

In the present invention, phosphorus pentafluoride is phosphorus halogen compound, and the oxidation number of phosphorus atoms is+5, includes four electricity of three center Sub-key, phosphorus pentafluoride are colourless foul gas at normal temperatures and pressures, and having intense irritation 1 to skin, eyes, mucous membrane is activity Great compound, can acutely generate toxic and corrosive hydrogen fluoride white smoke in humid air, phosphorus pentafluoride by with Make the catalyst of polymerization reaction.

Preparation step of the present invention is few, easy to operate, while improving the stability of battery electrolyte, effectively raises Lithium battery security performance.

Specific embodiment

Below in conjunction with the method in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.