Lithium battery classification
- classification:Company Dynamics
- release time:2021-02-25 14:17:30
Lithium batteries can be roughly divided into two categories: lithium ion batteries and polymer lithium batteries. Lithium-ion batteries do not contain metallic lithium, and are rechargeable, and have the advantages of environmental protection and pollution-free. Let's introduce the classification of lithium-ion batteries
1. According to the practical performance of the battery classification
According to the practical performance of lithium batteries, it can be divided into ordinary energy storage capacity type and power rate type. The power rate type has the characteristics of high density and high power output. Power rate batteries have increased with the advent of electric hybrid vehicles. It requires the battery to store high kinetic energy, can be suitable for the distance of pure electric vehicles, and has good output power characteristics, and enters the hybrid mode of oil and electricity in the low power consumption mode. Like the 18650 cylindrical power battery, it can be divided into 3C rate and 5C rate, which means that its own discharge current can reach 3 times and 5 times of its own capacity. The discharge rate of high-quality 3C batteries produced by some manufacturers can even reach 5C, and the rate of 5C can reach 8C. The energy storage type has the characteristics of high density and large capacity, and is generally used in electrical equipment that does not require high discharge current. The difference between the two of them has a big difference in discharge current and capacity.
2. Classification according to electrolyte material
Lithium batteries are divided into liquid lithium batteries (Li-ion) and polymer lithium batteries (Li-PO). The raw material of lithium battery is electrolyte (liquid or gel); the raw material of polymer lithium battery is electrolyte, including polymer electrolyte (solid or gel) and organic electrolyte.
3. Classified by product type
Divided into: cylinder, soft bag, square. Cylindrical and square outer packagings are often made of aluminum or aluminum. The outer packaging of the soft pack is aluminum plastic film. The shape of the soft pack battery is not fixed like a cylindrical and square battery. It can be customized according to requirements. The soft pack battery is also called a polymer lithium battery. The specifications of cylindrical lithium-ion batteries consist of five digits, the first two digits are the diameter, and the middle two digits are the height (length). The last 0 represents a cylindrical shape, and the unit is millimeters. For example, the 18650 lithium-ion battery has a diameter of 18 mm and a height of 65 mm, a cylindrical battery.
4. According to electrode material
Battery cathode material: Lithium cobaltate, lithium manganate, lithium nickelate, ternary (lithium nickel cobalt manganate), lithium iron phosphate, etc. have been used. The negative electrode active materials mainly include graphitized carbon materials, amorphous carbon materials, nitrides, silicon-based materials, new alloys and other materials. Minor components: do not directly participate in the electrode reaction, but can improve the battery's electrical conductivity and processing performance. There are mainly current collectors, adhesives and conductive agents.
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