Lithium iron phosphate batteries are better.
1. Comparison of the service life of lithium iron phosphate batteries and ternary lithium batteries
The remaining capacity of lithium iron phosphate batteries after 5,000 cycles is 84%, and that of ternary lithium batteries . The remaining capacity after 3900 cycles is 66%. Compared with service life, lithium iron phosphate batteries have more obvious advantages.
If the remaining capacity/initial capacity = 80% is used as the end point of the test, the life of the 1C lithium iron phosphate battery laboratory is more than 3,500 times, and some reach 5,000 times. times, while the 1C ternary lithium battery laboratory The service life is about 2500 times.
In terms of service life, the actual service life of lithium iron phosphate batteries is much longer than that of ternary lithium batteries. Belowthe same number of cycles, the remaining capacity of lithium iron phosphate batteries is much higher than that of ternary lithium batteries.
There is a big gap between the two batteries in terms of lifespan and safety performance.
2. Comparison of safety performance of lithium iron phosphate batteries and ternary lithium batteries.
From the perspective of the material system, the decomposition temperature of the cathode material of lithium iron phosphate batteries is about 700°C, and that of ternary lithium batteries is about 200°C .
In laboratory testing environments, short-circuited lithium iron phosphate battery cells will virtually not catch fire. The ternary lithium battery is different and is more likely to catch fire. Therefore, the ternary lithium battery has higher thermal management requirements, while the lithium batteryium iron phosphate has greater temperature adaptability and is safer.