advantage
1. The energy is relatively high. With high storage energy density, it has reached 460-600Wh/kg, which is about 6-7 times that of lead-acid batteries;
2. Long service life, the service life can reach more than 6 years. The battery with lithium iron phosphate as the positive electrode can be charged and discharged at 1C (100% DOD), and it can be used for 10,000 times. The battery with lithium cobalt oxide as the positive electrode can be charged and discharged. 2000 records used;
3. The rated voltage is high (the single working voltage is 3.7V or 3.2V), which is approximately equal to the series voltage of 3 nickel-cadmium or nickel-metal hydride rechargeable batteries, which is convenient to form a battery power pack; lithium batteries can pass a new type of lithium battery voltage regulator The technology adjusts the voltage to 3.0V to suit the use of small appliances.
4. It has high power tolerance, and the lithium iron phosphate lithium ion battery used in electric vehicles can reach 15-30C charge and discharge capacity, which is convenient for high-intensity start-up acceleration;
5. The self-discharge rate is very low, which is one of the most prominent advantages of the battery. Generally, it can be less than 1%/month, which is less than 1/20 of the nickel-hydrogen battery;
6. Light weight, the weight is about 1/6-1/5 of the lead-acid product under the same volume;
7. High and low temperature adaptability, it can be used in the environment of -20℃–60℃, after the process treatment, it can be used in the environment of -45℃;
8. Green and environmental protection, regardless of production, use or scrap, it does not contain or produce any toxic and harmful heavy metal elements and substances such as lead, mercury, and cadmium.
9. Production basically does not consume water, which is very beneficial to my country, which is short of water.
Specific energy refers to the energy per unit weight or unit volume. Specific energy is expressed in Wh/kg or Wh/L. Wh is the unit of energy, W is watt, h is hour; kg is kilogram (weight unit), L is liter (volume unit).
shortcoming
1. Lithium primary batteries have poor safety, and there is a danger of explosion.
2. Lithium cobalt oxide lithium-ion batteries cannot be discharged at high currents, are expensive, and have poor safety.
3. Lithium-ion batteries need to protect the circuit to prevent the battery from being overcharged and over-discharged.
4. The production requirements are high and the cost is high.
5. The use conditions are limited, and the use of high and low temperature is dangerous.
characteristic
1. High energy density: The weight of a lithium-ion battery is half that of a nickel-cadmium or nickel-hydrogen battery of the same capacity, and its volume is 20-30% of nickel-cadmium and 35-50% of nickel-hydrogen.
2. High voltage: The operating voltage of a single lithium-ion battery is 3.7V (average value), which is equivalent to three nickel-cadmium or nickel-hydrogen batteries connected in series.
3. No pollution: Li-ion batteries do not contain harmful metal substances such as cadmium, lead, and mercury.
4. No metal lithium: Lithium-ion batteries do not contain metal lithium, so they are not subject to restrictions on the prohibition of carrying lithium batteries on passenger aircraft in aircraft transportation.
5. High cycle life: Under normal conditions, the charge and discharge cycles of lithium-ion batteries can exceed 500 times, and lithium iron phosphate (hereinafter referred to as ferrophosphorus) can reach 2000 times.
6. No memory effect The memory effect refers to the phenomenon that the capacity of the nickel-cadmium battery decreases during the charge-discharge cycle. Lithium-ion batteries do not have this effect.
7. Fast charging uses a constant current and constant voltage charger with a rated voltage of 4.2V, which can fully charge the lithium-ion battery within 1.5-2.5 hours; while the newly developed lithium iron phosphate battery can already be fully charged within 35 minutes Electricity.
Post time: Sep-02-2021
