Analysis of the advantages and disadvantages of lithium batteries

Advantages and disadvantages of lithium batteries Advantages of lithium batteries 1. Lithium batteries have a high-voltage platform, and the average voltage of a single battery is 3.7v or 3.2v, which is approximately equal to the series voltage of three nickel-cadmium batteries or nickel-metal hydride batteries, which is conducive to the formation of battery power group. 2. Compared with batteries, lithium batteries have a higher energy density. It has a high energy storage density, reaching 460-600wh/kg, which is about 6-7 times that of lead-acid batteries. 3. Compared with lead-acid batteries, lithium batteries are lighter, about 1/5-6 of the same volume of lead-acid products. 4. Lithium batteries have a longer life span, with a service life of more than 6 years. Lithium iron phosphate is used as The positive battery has 1CDOD charge and discharge, and has a record of 1000 times of use. 5. The lithium iron phosphate battery for electric vehicles has a high power carrying capacity, which can reach a charge and discharge capacity of 15-30c, which is convenient for high-intensity startup and acceleration. 6. Low self-discharge rate and no memory effect. It is often used for power supply of daily electronic products. 7. Lithium battery has strong adaptability to high temperature and low temperature. It can be used in the environment of -20℃-60℃, and can be used in the environment of -45℃ after production. 8. Green and environmental protection, regardless of processing, use, or scrapping, no lead, mercury, cadmium and other toxic and harmful heavy metal elements and substances are free or present. Disadvantages of lithium batteries 1. The safety of lithium batteries is poor and there is a danger of explosion. 2. Lithium batteries made of lithium cobalt oxide cannot be discharged under high current, and their safety is poor. 3. Lithium batteries must protect the circuit to prevent overcharge and overdischarge of the battery. 4. High processing requirements and high cost There are many reasons for the explosion of lithium batteries, which can be roughly divided into external short circuits, internal short circuits and overcharging. Normally, the two poles of a lithium battery are not in contact, so the battery manufacturer places a separator between the two poles. High-quality diaphragm paper, when the internal temperature of the battery is high, it will block the tiny holes and stop the electrochemical reaction, causing the current to drop suddenly and the temperature slowly to prevent explosion. However, if the diaphragm ruptures under the influence of various factors, all the energy in the battery will rush to the electrolyte, and the electrolyte itself is an unstable chemical substance. After absorbing too much energy, it will heat up and burn. Lithium batteries generally can be fully charged for 300-500 charging cycles, and the battery cannot be used after this cycle. Of course, this can only be used as a reference. The life of a lithium battery has nothing to do with the number of recharges, but with the charge and discharge cycle, that is, the number of times from zero to full charge. The charging cycle refers to the capacity of the battery from full to empty, and then from empty to full, which is different from charging. For example, a lithium battery uses half of its power on the first day and then recharges it. If this is the case, charge half of the charge the next day and charge twice, which counts as one cycle, not two cycles. In daily life, it may take several times to complete a cycle. The battery capacity drops a little every cycle. Nevertheless, the price reduction is very small, high-quality batteries can still maintain 80% of the original capacity after multiple recharges, and many lithium-ion products can continue to be used after two to three years. Of course, the service life of the lithium battery has yet to be finally replaced. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Do you know the correct way to use lithium batteries?