CN102522588A

CN102522588A - Heatless preparation process of lithium battery electrolyte

Info

Publication number: CN102522588A
Application number: CN201110349520XA
Authority: CN
Inventors: 曹少华
Original assignee: TIANJIN TAIHAO LITHIUM BATTERY CO Ltd
Current assignee: TIANJIN TAIHAO LITHIUM BATTERY CO Ltd
Priority date: 2011-11-08
Filing date: 2011-11-08
Publication date: 2012-06-27

Abstract

The invention discloses a safe and convenient heatless preparation process of a lithium battery electrolyte. The process is characterized in that the main materials of the preparation process comprise propylene carbonate, ethylene glycol dimethyl ether, 1,3-dioxolane and lithium perchlorate, wherein the materials are the battery grade, and the water contents of the materials are not more than 200 PPM. In the traditional electrolyte preparation process, the heating treatment is required, such that the explosion is easily generated so as to cause property damage and waste production resource, and cause casualty and adverse social impact. With the present invention, the heatless separation is adopted, such that the generation of the danger is effectively avoided, and the production safety is strengthened on the premise of ensurence of the production efficiency.

Description

Lithium battery electrolytes does not have hot preparing process

Technical field

The present invention relates to a kind of lithium battery electrolytes preparing process, relating in particular to a kind of lithium battery electrolytes does not have hot preparing process.

Background technology

The secondary cell that generally uses at present has four kinds: lead-acid battery, nickel-cadmium cell, Ni-MH battery and lithium ion battery.Characteristics such as lithium ion battery has that operating voltage height, volume are little, light weight, specific energy height, memory-less effect, self discharge are little, have extended cycle life, environmentally safe; Be widely used as the power supply of pocket valuable household electrical appliance such as mobile phone, portable computer, video camera etc. at present; And in Aeronautics and Astronautics, navigation, artificial satellite, small medical and military domain of communication equipment, progressively substituted traditional battery, be the desirable energy of 21 century development.

Commercial lithium ion battery is at first released in the nineties in 20th century by Sony company.Lithium ion battery mainly is made up of positive electrode, negative material, electrolyte, barrier film four parts, and wherein, electrolyte is the ion conductor that between the battery positive and negative electrode, plays conduction, and the performance of itself influences the performance of battery to a great extent.

Lithium battery electrolytes preparing process in the current techniques need mostly to adopt to add the method manufacturing that thermal distillation is purified, but this kind technology is prone to cause the burning and the blast of material; Danger is bigger; Not only can cause the loss of property in case cause danger, more can cause casualties, consequence is serious.

Summary of the invention

In order to solve above technical problem; The present invention provide a kind of safe, lithium battery electrolytes does not have hot preparing process easily; It is characterized in that this preparing process major ingredient is propene carbonate, glycol dimethyl ether, 1; 3-dioxolane and lithium perchlorate, above material all require to be LITHIUM BATTERY, and water content must not be greater than 200PPM.This configuration technology is:

1, the 4A molecular sieve is put into drying plant, temperature is transferred to 400 degrees centigrade, dries 4 hours, places relative humidity to bottle the cooling back down less than 1% environment in the 4A molecular sieve, and sealing wax is preserved;

2, get the narrow mouth reagent bottle of four 2500ML, be respectively charged into propene carbonate, glycol dimethyl ether, 1,3-dioxolane and lithium perchlorate solution; Add 50-80 gram molecule sieve in every bottle; Sealing wax is preserved, and sooner or later respectively shakes once every day, until reducing to below the 30PPM;

3, will with the mixed propene carbonate of 4A molecular sieve, glycol dimethyl ether, 1; 3-dioxolane solution successively adds in the lithium perchlorate container that is contained with 1.1mol/l according to 3: 2: 5 ratio; All to stir when adding new soln with stirring rod at every turn; Solution is fully mixed, and the solution that draws is the lithium battery electrolytes of processing under this configuration technology, and its moisture content should be below 50PPM.

Beneficial effect of the present invention is: electrolyte quota arts demand heating in the traditional handicraft, be prone to set off an explosion, and the lighter causes any property loss, the waste resources of production; Weight person causes casualties, and causes abominable social influence.The present invention adopts no thermal release, has avoided dangerous generation effectively, under the prerequisite that ensures production efficiency, strengthens production safety.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Embodiment

According to shown in Figure 1, flow process of the present invention is:

The auxiliary material molecular sieve is put into drying plant, and temperature is transferred to 400 degrees centigrade, dries 4 hours, it is fully dried, relative humidity less than 1% environment under cooling back bottling, sealing wax is preserved.

Major ingredient is propene carbonate, glycol dimethyl ether, 1; 3-dioxolane and lithium perchlorate; All requiring is LITHIUM BATTERY, and water content must not be greater than 200PPM, if the excessive situation of water content; Then will in the liquid charging stock bucket, add the molecular sieve after 1KG regenerates, lithium perchlorate then needs vaccum dewatering below 200PPM.

Divide the narrow mouth reagent bottle packing with 2500ML raw material, add 50-80 gram molecule sieve in every bottle, sealing wax is preserved, and morning and evening every day respectively shake once, until reducing to below the 30PPM, moisture is too high can suitably add some molecular sieves again.

Get the raw material that removed water, press propene carbonate: glycol dimethyl ether: 1, the preparation of 3: 2: 5 proportioning of 3-dioxolane, the lithium perchlorate of adding 1.1mol/l.Survey moisture content after preparation finishes and below 50PPM, to screen out water, if remove not get off and to scrap otherwise add molecule.

Preparation charging sequence is: put lithium perchlorate earlier in bottle, add the glycol dimethyl ether thixotropyization again, add 1 again, the 3-dioxolane adds propene carbonate at last, and adding all will stir behind the solution at every turn can add a kind of solution down.

Claims

1. a lithium battery electrolytes does not have hot preparing process, it is characterized in that this preparing process major ingredient is propene carbonate, glycol dimethyl ether, 1, and 3-dioxolane and lithium perchlorate, above material all require to be LITHIUM BATTERY, and water content must not be greater than 200PPM.This preparing process is:

(a) the 4A molecular sieve is put into drying plant, temperature is transferred to 400 degrees centigrade, dries 4 hours, places relative humidity to bottle the cooling back down less than 1% environment in the 4A molecular sieve, and sealing wax is preserved;

(b) get the narrow mouth reagent bottle of four 2500ML, be respectively charged into propene carbonate, glycol dimethyl ether, 1,3-dioxolane and lithium perchlorate solution; Add 50-80 gram molecule sieve in every bottle; Sealing wax is preserved, and sooner or later respectively shakes once every day, until reducing to below the 30PPM;

(c) will with the mixed propene carbonate of 4A molecular sieve, glycol dimethyl ether, 1; 3-dioxolane solution successively adds in the lithium perchlorate container that is contained with 1.1mol/l according to 3: 2: 5 ratio; All to stir when adding new soln with stirring rod at every turn; Solution is fully mixed, and the solution that draws is the lithium battery electrolytes of processing under this preparing process, and its moisture content should be below 50PPM.