Buying a new energy vehicle, mainly talking about pure electric vehicles, it is very important to choose the type of battery. Because it affects battery life, price, charging efficiency and safety, and so on. This you first need to know their respective advantages and disadvantages!
Advantages of ternary lithium batteries: high energy density, generally in 140wh/ kg ~ 160 wh / kg; so the general endurance is longer, low temperature resistance is better, at -20 ° C can still maintain about 70% to 80% of the normal battery capacity; charging speed is faster.
Disadvantages: high material cost, more expensive price, poor thermal stability, poor safety performance.
Advantages of lithium iron phosphate batteries: low material cost, lower price, better thermal stability, better safety performance.
Disadvantages: low capacity density, energy density is generally 90-120 W / kg, so the same quality of the endurance is not as good as ternary lithium battery; low temperature resistance performance is a little worse, in -20 ° C conditions can only maintain about 50% to 60% of the normal battery capacity.
In terms of battery life, lithium iron phosphate batteries can generally be charged and discharged more than 3500 times, while ternary lithium batteries are relatively rare about 2000-2500 times. Under the same cycle times, the remaining capacity of lithium iron phosphate batteries is also more than that of ternary lithium batteries, which is really longer and more durable.
Of course, it should also be explained here that the safety of the battery is only in the physical and chemical characteristics, lithium iron phosphate batteries are better than ternary lithium batteries. However, the safety of the power battery is a system project, in addition to the safety of the battery itself, the electronic control system, the thermal management system, and the physical structure of the battery are very important. Therefore, it cannot be simply said that the safety of ternary lithium batteries is far inferior to that of lithium iron phosphate batteries.
So in general, if you have high requirements for battery life, do not care about higher prices, and can also find a trusted ternary lithium battery brand model, it is worth considering. In the absence of particularly high requirements for endurance, the model of lithium iron phosphate battery is still very recommended. Its only shortcoming is poor low temperature performance. However, if you use a car in the northern region where the temperature is below minus 10 degrees Celsius in winter, you must be prepared to halve the battery life.