Life analysis of lithium-ion batteries with different formulas

1. Life of soft-pack lithium-ion battery (1) The theoretical service life of soft-pack polymer lithium-ion battery is more than 500 cycles, used in 3C products, and the service life is 3 to 5 years; (2) The theoretical use of soft-pack lithium iron phosphate battery Life span is about 1500 cycles, low current charge and discharge, battery life is more than 10 years, high current discharge, life span is about 5 years; 2. Steel shell lithium ion battery life (1) The theoretical life of steel shell lithium ion battery is 300 to 500 cycles , Low current discharge, 2 to 3 years; (2) The theoretical service life of steel-case lithium iron phosphate battery is about 1000 cycles, and the low current discharge is about 3 years; in fact, the way users use lithium ion batteries is ever-changing, because The actual service life of the lithium-ion battery will be different due to different usage conditions. In fact, the number of cycles of lithium-ion batteries is not only affected by the way users use them, but also related to the processing technology and material formulations of manufacturers that process lithium-ion batteries. In fact, the number of cycles obtained by different cycle systems is completely different. For example, the other conditions above remain unchanged, and only the constant voltage voltage of 4.2V is changed to the constant voltage voltage of 4.1V. The cycle life test of the same type of battery is carried out. In this way, this battery is no longer a deep charging method, and the cycle life can be increased by nearly 60% after the final test. If the cut-off voltage is increased to 3.9V for testing, the cycle number should be increased several times. It doesn't make any sense to talk about the number of cycles aside from the rules, because the number of cycles is a means of testing battery life, not a goal! Myth: Many people like to use lithium-ion batteries in mobile phones until they are automatically turned off and recharged. This is completely unnecessary. In fact, it is impossible for users to use the battery in accordance with the national standard detection mode. No mobile phone will shut down at 2.75V, and its discharge mode is not a high-current constant-current discharge, but a mixture of GSM pulse discharge and normal low-current discharge. The way. There is another measure of cycle life, which is time. Some experts have proposed that the lifespan of lithium-ion batteries for general civilian use is 2 to 3 years. Based on actual conditions, for example, 60% of the capacity is used as the end of life, plus the aging use of lithium-ion batteries, and the cycle life is expressed by time. As reasonable. Disclaimer: Some pictures and contents of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Can lithium-ion batteries directly replace lead-acid batteries?