What are the reasons for the over-discharge of lithium iron phosphate battery packs

The charging process is a process of filling a bucket with water, and this process is a length of time. The larger the faucet, the faster it can be filled with water. In the same way, charging the battery depends on the charging current, the higher the current, the shorter the charging time! ! ! Discharge: The discharge process is actually the reverse of the above, a process of letting off the water. Of course, it depends on the power of your power supply load end. The greater the power, the more power is consumed, and the discharge time will be relatively shorter! ! Here you have to give detailed values u200bu200bto calculate. For example, a group of LFP---48V100AH u200bu200bcommunication base station power supply group. The charging current is 20A, that is, the overflow time is 5 hours; the charging time is obtained by dividing the capacity of the battery pack by the current. Discharge assumption: the power at the load end is 500W, that is: 500W (load end power)/48V (rated voltage)u003d10.42A (current) 100AH u200bu200b(battery capacity)/10.42A (current)u003d9.6 hours (working time) overcharge and overdischarge They are all operating behaviors that exceed the original capacitance. Overcharge and overdischarge will damage the lithium iron phosphate battery and cause damage to the battery, which is irreversible. Overcharge will cause lithium dendrites, and overdischarge will cause copper dendrites, which will cause problems such as short circuit and failure of lithium batteries; therefore, lithium batteries require shallow charging and shallow discharge. At present, it is necessary to have a protection circuit as much as possible in the process of using lithium batteries, so as to ensure safety. At the same time, the lithium iron phosphate battery is a relatively safe type of lithium batteries. 12 series and quad-parallel 26650 power lithium iron phosphate battery pack, the voltage is very low after being discharged without charging for a long time. The special charger is currently connected, and the green light is displayed. Taking into account that the internal resistance of the discharge is very large after a long time, even if the current can be rushed in, the current is very small, and the green light is normal. When a single lithium iron phosphate is dead, it can be recovered by charging it straight with a charger. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: 18650 battery test and decomposition