Advantages
1, high energy. The storage energy density is high, reaching 460-600wh/kg, about 6-7 times that of lead-acid battery
2. Long service life, up to more than 6 years. The battery with lithium iron phosphate as the positive pole can be charged and discharged at 1C (100%dod) and can be used for 10000 times. The battery with lithium cobalt oxide as cathode can be charged and discharged. 2000 records used
3. The rated voltage is high (the working voltage of a single section is 3.7V or 3.2V), which is about equal to the series voltage of three nickel cadmium or nickel hydrogen rechargeable batteries, which is convenient to form a battery power pack; Lithium battery can adjust the voltage to 3.0V through a new lithium battery voltage stabilization technology to adapt to the use of small household appliances
4. High power endurance. Lithium iron phosphate lithium-ion battery for electric vehicles can reach 15-30c charge and discharge capacity, which is convenient for high-intensity startup and acceleration
5. Extremely low self discharge rate is one of the outstanding advantages of the battery. Generally, it can be lower than 1%/ month, which is lower than 1/20 of Ni MH battery
6. Light weight, about 1/6-1/5 of lead acid products under the same volume
7. It has strong adaptability to high and low temperature. It can be used at -20 ℃ --60 ℃ and -45 ℃ after process treatment
8. It is green and environmentally friendly. It does not contain or produce toxic and harmful heavy metal elements and substances such as lead, mercury and cadmium, regardless of production, use and scrap
9. Production basically does not consume water, which is very beneficial to China, which is short of water
specific energy refers to the energy per unit weight or volume. Specific energy is expressed in wh/kg or wh/l. Wh is the unit of energy, W is the watt, h is the hour; Kg is kilogram (weight unit) and l is liter (volume unit)
disadvantages
1. The lithium primary battery has poor safety and is in danger of explosion
2. Lithium cobalt acid lithium-ion battery can not discharge with high current, which is expensive and has poor safety
3. The lithium-ion battery needs to protect the circuit to prevent overcharge and discharge of the battery
4. High production requirements and high costs
5. The use conditions are limited, and high and low temperature use is dangerous
features
1. High energy density: the weight of lithium-ion battery is half of that of nickel cadmium or nickel hydrogen battery with the same capacity, and the volume is 20-30% of nickel cadmium, and the volume is 35-50% of nickel cadmium
2. High voltage: the working voltage of a single lithium-ion battery is 3.7V (average value), which is equivalent to three nickel cadmium or nickel hydrogen batteries in series
3. No pollution: lithium ion batteries do not contain harmful metal substances such as cadmium, lead and mercury
4. No metallic lithium: lithium ion batteries do not contain metallic lithium, which is not restricted by the prohibition of carrying lithium batteries on air transport aircraft
5. High cycle life: under normal circumstances, the number of charge and discharge cycles of lithium-ion batteries can reach more than 500, and that of lithium iron phosphate (hereinafter referred to as ferrophosphate) can reach 2000
6. No memory effect memory effect refers to the phenomenon that the capacity of nickel cadmium battery decreases during the charging and discharging cycle. Lithium ion batteries do not have this effect
7. Constant current and constant voltage charger with rated voltage of 4.2V is used for fast charging, which can fully charge the lithium-ion battery within 1.5-2.5 hours; The newly developed lithium iron phosphate battery can be fully charged in 35 minutes