How many types of lithium batteries are there, do you know?
Lithium batteries are mainly divided into four types: lithium iron phosphate, lithium manganese manganate, lithium ternary polymer batteries, lithium cobalt acid batteries. At present, the mainstream use of lithium batteries are three kinds of lithium batteries, mainly lithium iron phosphate batteries, lithium manganese batteries, lithium ternary polymer batteries.
First, how many types of lithium batteries?
1, lithium batteries by appearance: square lithium batteries and cylindrical (such as 18650 batteries)
2, lithium battery packaging materials: aluminum lithium batteries, steel lithium batteries, soft pack batteries
3, lithium battery from the positive and negative materials (additives): lithium carbonate (LiCoO2) batteries or lithium manganate (LiMn2O4), lithium iron phosphate batteries, disposable lithium manganese dioxide batteries; the other point: lithium-ion LIB, polymer PLB
Second, the advantages and disadvantages of lithium batteries and uses
1、Lithium manganate battery
Lithium manganate battery refers to the battery using lithium manganate material in the positive pole. The nominal voltage of LiMn2O4 battery is 2.5~4.2v, and LiMn2O4 battery is widely used for its low cost and good safety.
Advantages: low cost, cheap price, good safety performance, good low temperature performance, discharge at minus 20 degrees can have more than 90% efficiency.
Disadvantages: poor performance in high temperature, poor multiplier discharge, low cycle life, about 300 to 400 times, easy to swell.
Scope of use: Li-Mn2O4 batteries are mainly used as power batteries in the field of new energy vehicles.
2、Ternary polymer lithium battery
Ternary lithium polymer battery refers to the lithium battery using lithium nickel cobalt manganese oxide (LNCMO) or lithium nickel cobalt aluminate (LNCA) ternary cathode material, which is more balanced in terms of capacity and safety. The precursor of ternary composite cathode material is made of nickel salt, cobalt salt and manganese salt, and the proportion of nickel, cobalt and manganese in it can be adjusted according to the actual needs. The energy density of ternary lithium battery is bigger, but the safety is often doubted.
Advantages: high capacity, nominal capacity of 1250mAh, good cycle life, generally 600 to 700 times, better than normal lithium cobalt, good multiplier discharge.
Disadvantages: low battery energy density, safety performance is the worst of the three batteries, cycle stability at high temperatures and poor storage performance.
Scope of use: at present, the three yuan material polymer lithium batteries in the field of notebook batteries are widely used, the world's top 5 battery brands SANYO, PANASONIC, SONY, LG, SAMSUNG have launched three yuan material battery.
3, lithium iron phosphate battery
Lithium iron phosphate battery, refers to the lithium ion battery with lithium iron phosphate as the cathode material. Lithium iron phosphate electric heat peak up to 350 ℃ -500 ℃ and lithium manganate and lithium cobalt only in 200 ℃ or so. It has a wide operating temperature range (-20C-+75C) and high temperature resistance.
Advantages: good multiplier discharge, no memory effect, can be charged and discharged, high cycle life, generally about 1500 times, high temperature performance, 45 ℃ can still work normally, in the electric car charging very quickly, can be fully charged in 6 minutes, can be discharged 20 times.
Disadvantages: poor low-temperature, in the case of -10 ℃ will greatly affect its performance, due to lithium iron phosphate on the production process requirements to very high, low productivity, high cost, and therefore more expensive.