To know whether the lithium battery phosphate battery pack is overcharged and over-released, from its charge and discharge calculation method to understand.
Calculation method for charge and discharge of lithium iron phosphate lithium battery pack
The charging process is a process of filling a bucket with water, and the process is a length of time. The bigger the tap, the faster it fills up with water.
The same amount of charging of the battery depends on the current charge, the larger the charge time is less!!!
The discharge process is actually the reverse above, put the water off a process, of course, here depends on the power of your power load end, the greater the power more power consumption, discharge time will be much shorter! !
Here you have to give a specific value before you can calculate.
For example, a group of LFP --- 48V100AH communication base station with power supply group.
The charging current is 20A, i.e. the time to fully charge is 5 hours;
Discharge hypothesis: 500W power at the load end
I.E.: 500W (load end power)/48V (rated voltage) - 10.42A (current) 100AH (battery capacity)/10.42A (current) - 9.6 hours (working time)
Overcharged is the operation behavior that exceeds the original electrical capacity. Overcharged lithium iron phosphate batteries are damaged, causing battery damage, and is irreversible. Overcharging will lead to lithium branches, over-release will lead to copper branches, will cause lithium batteries short circuit, fault, and other problems; At present, the use of lithium batteries in the process of trying to have a protective circuit, in order to ensure safety. At the same time, the iron phosphate lithium battery is a relatively high safety of lithium batteries.