1、 Lithium batteries are divided into square type lithium batteries (such as commonly used mobile phone battery cells) and cylindrical type batteries (such as 18650) according to their appearance

　　2、 Lithium battery outsourcing materials include aluminum shell lithium batteries, steel shell lithium batteries, and soft pack batteries

　　3、 Lithium batteries can be divided into positive and negative electrode materials (additives): lithium gluconate (LiCoO2) batteries or lithium manganese oxide (LiMn2O4) batteries, lithium iron phosphate batteries, and disposable manganese dioxide lithium batteries; Another point: lithium ion LIB, polymer PLB

　　Lithium iron phosphate battery

　　Lithium iron phosphate battery refers to a lithium-ion battery that uses lithium iron phosphate as the positive electrode material. The electric heating peak of lithium iron phosphate can reach 350 ℃ -500 ℃, while that of lithium manganese oxide and lithium cobalt oxide is only around 200 ℃. The working temperature range is wide (-20C -+75C) and has high temperature resistance characteristics.

　　Advantages: Good rate discharge, no memory effect, can be charged and discharged at any time, with a long cycle life, generally around 1500 times, good high-temperature performance, and can still work normally at 45 ℃. It can be charged quickly in electric vehicles, can be fully charged in 6 minutes, and can discharge 20 times.

　　Disadvantages: Poor low-temperature performance, greatly affecting its performance at -10 ℃. Due to the high production process requirements, low productivity, and high cost of lithium iron phosphate, its price is relatively expensive.

　　Scope of use of lithium iron phosphate batteries: Suitable for large electric vehicles such as buses, electric vehicles, scenic tour buses, and hybrid electric vehicles; Light electric vehicles: electric bicycles, golf carts, small flat battery trucks, forklifts, cleaning vehicles, electric wheelchairs, etc; Electric tools: electric drills, electric saws, lawn mowers, etc; Remote control of toys such as cars, ships, and airplanes; Energy storage equipment for solar and wind power generation; UPS and emergency lights, warning lights, and mining lights; Replace 3V disposable lithium batteries and 9V nickel cadmium or nickel hydrogen rechargeable batteries in cameras; Small medical equipment and portable instruments, etc.

　　However, it is currently widely used in the field of new energy vehicles and stands out in the automotive industry alongside ternary polymer lithium batteries and lithium manganate batteries.

　　Lithium manganese oxide battery

　　Lithium manganese oxide battery refers to a battery with a positive electrode made of lithium manganese oxide material. Lithium manganese oxide batteries have a nominal voltage of 2.5-4.2v, and are widely used due to their low cost and good safety.

　　Advantages: Low cost, cheap price, good safety performance, good low-temperature performance, and over 90% efficiency when discharging at minus 20 degrees Celsius below zero

　　Disadvantages: Poor performance at high temperatures, poor rate discharge, low cycle life, around 300 to 400 cycles, prone to expansion

　　Scope of use: Lithium manganese oxide batteries in China are mainly used as power batteries in the field of new energy vehicles.

　　Triple polymer lithium battery

　　Ternary polymer lithium batteries refer to lithium batteries with ternary cathode materials such as nickel cobalt manganese lithium or nickel cobalt aluminum lithium, which are relatively balanced in terms of capacity and safety. The precursor product of ternary composite positive electrode material is made of nickel salt, cobalt salt, and manganese salt as raw materials, and the proportion of nickel cobalt manganese inside can be adjusted according to actual needs. Ternary lithium batteries have a higher energy density, but their safety is often questioned.

　　Advantages: High capacity, nominal capacity of 1250mAh, good cycle life, generally 600 to 700 cycles, better than normal lithium cobalt oxide, and good rate discharge

　　Disadvantages: Low battery energy density, worst safety performance among the three batteries, poor cycling stability and storage performance at high temperatures

　　Scope of use: Currently, ternary polymer lithium battery cells are widely used in the field of notebook batteries. The world's top five battery cell brands SANYO, PANASONIC, SONY, LG, and SAMSUNG have all launched ternary battery cells.

　　Lithium Cobalt Acid Battery

　　Lithium cobalt oxide batteries can be considered as the ancestor of positive electrode materials for lithium batteries, with superior electrochemical performance and high compaction density. Lithium cobalt oxide batteries have stable structure, high capacity ratio, and outstanding comprehensive performance, but their safety is poor and their cost is very high. They are mainly used in small and medium-sized battery cells and are widely used in small electronic devices such as laptops, mobile phones, MP3/4, etc., with a nominal voltage of 3.7V.

　　Advantages: Stable structure, high capacity ratio, and outstanding comprehensive performance

　　Disadvantages: However, its safety is poor and its cost is very high

　　Scope of use: Currently, it is only widely used in the digital electronic product market, such as small electronic devices such as laptops, mobile phones, MP3/4, etc. There are very few people who make car power batteries.

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