This often yankees general electric pool

A, lithium ion battery name introduction
Now widely known use of lithium-ion battery consists of lithium batteries. So in understanding lithium ion battery before, we first introduce the lithium batteries.
Lithium ion battery the anode material is lithium cobalt oxide anode material, it is carbon materials. Battery produced by the positive anode carbon materials lithium ion in the embedded with evicted realize battery charge-discharge process, in order to different from traditional sense of lithium battery, so people called the lithium ion battery.

Second, the lithium ion battery of the extensive use
Develop high-tech purpose is to make it better service to humans. Lithium ion battery since 1990 since the advent, because its superior performance has developed rapidly, and widely used in society. Lithium ion battery in other battery incomparable advantage rapidly occupied many fields, like familiar with mobile phones, laptops, miniature camera, etc, and more and more countries will the batteries used in military purposes. Application shows that lithium ion battery is a kind of ideal for small green power.

Third, lithium ion battery of the main composition
1, positive composition:
A, cobalt acid lithium: positive active substances, lithium ion source, lithium battery source for improving.
B, conductive agent: improving the positive slice of electrical conductivity, compensation positive active substances electronic conductivity. Improve the positive slice of electrolytes absorb fluid amount, increase the reaction interface, reduce polarization.
C, PVDF adhesives: will cobalt linbo3, conductive agent and aluminum or aluminum meshes gluing together.
2, negative composition:
A, graphite anode active substances, which constitute: the main substance; negative reaction Mainly divided into natural graphite and artificial graphite two kinds big.
B, conductive agent: improve anode slice of electrical conductivity, compensation anode active substances electronic conductivity. To improve the reaction depth and utilization. Prevent branch of wafers production. Use of conductive materials to absorb fluid ability, improve the reaction interface, reduce polarization. (can choose according to the graphite particle size distribution plus or without).
C, additives: reduce not NiFanYing, improve adhesion strength, improve the paste viscosity, prevent slurry precipitation.
D, water-borne binder: will graphite, conductive agent, additives and copper foil or copper nets gluing together.

Four, lithium ion battery superior performance
We often say is the superiority of lithium ion batteries for the traditional nickel cadmium battery (Ni/Cd) and nimh batteries (Ni/MH) speaking. So, thats exactly lithium-ion batteries?
(1) high working voltage
(2) than energy
(3) long cycling life
(4) low self-discharge
(5) no memory effect
(6) non-pollution

The following is nickel cadmium, nimh, lithium ion battery performance comparison:
Technical parameters ni-cd battery ni-h cell lithium-ion battery
Working voltage (V) 1.2 1.2 3.6
Weight than energy (Wh/Kg) 50 105-140 65
The volume ratio of energy (Wh/l) 150 to 200 300
Charge-discharge lifespan (times) 500 500 1,000
Self-discharge (% / month) 25-30, 30-35 6-9
Whether there is no memory effects
There are no pollution without

Five, the working principle of lithium ion batteries
Everybody already know, lithium ion battery the anode material is cobalt oxide, lithium anode carbon.
The working principle of lithium ion battery is refers to the charging and discharging principle. When the battery charge, battery anode has lithium ion to generate, generated by the electrolyte of lithium ion movement to the negative terminal. But as the cathode carbon is layered structure, it has a lot of microporous, reach of negative lithium ion is embedded into carbon layer of microporous, embedded lithium ion battery capacity more higher.
Similarly, when the battery for electric discharge (i.e. we use battery process), anode carbon layer embedded in the lithium ion emerge, and movement back to the positive. Return to positive lithium ion, the more discharge capacity is higher. We usually say of battery capacity meant discharge capacity.
See not hard, the charging and discharging lithium ion battery in process, lithium ion in from the positive - negative - positive motions. If we take the lithium ion battery vividly metaphor for a rocking chair, rocking chair at both ends of the battery, and for the extremes of lithium ion as excellent athletic, rocking back and forth on both ends of the run. So, experts gave lithium ion battery a lovely name rocking chair type battery.

Six, lithium ion battery assembly process
Lithium ion battery technology is very strict, complex, here only briefly introduce one of several main process.
(1) pulping
With special solvent and binder respectively with powdered anode active material is mixed, via high-speed mixing evenly, make pulpous state of positive anode material.
(2) coating
Will be made of slurry evenly coated in metallic foil surface, drying, made are extremely negative respectively piece.
(3) assembly
According to the positive piece - diaphragm - negative piece - diaphragm top-down order made by winding down, core, then after injection electrolyte, sealing etc process, namely complete battery assembly process, make battery products.
(4) into
Using special battery charging and discharging equipment for the finished products battery charging and discharging test, to every one batteries testing, and screened qualified battery products, to leave the factory.

Seven, lithium ion battery security feature
Lithium ion battery has already very widely applied in Peoples Daily life, so it should definitely is the safety performance of the lithium ion battery first items of performance indicators. For lithium ion battery safe the performance index, international regulations