Low temperature will reduce the activity of lithium batteries, slow down the reaction speed and deteriorate the conductivity of the electrolyte. These are the reasons for the decline in performance of lithium batteries.
Lithium batteries are widely used in our daily lives, such as mobile phones, tablets, laptops, etc.
The pure electric cars we drive and the pure electric buses we see on the road also use lithium batteries.
Generally, domestic pure electric vehicles use ternary lithium batteries, and their positive electrodes are made of ternary materials, some of which are nickel, cobalt and aluminum, and some are nickel. nickel, cobalt and manganese. .
The advantages of ternary lithium batteries are high energy density, light weight and good low-power performance.temperature.
The disadvantage of ternary lithium batteries is that their safety is not very good. This type of battery starts to burn at 200°C. If it is not recycled after being thrown away, the environmental pollution will be very serious.
Pure electric buses generally use lithium iron phosphate batteries, and the positive electrode is iron phosphate.
The advantage of lithium iron phosphate batteries is that they are safer. This type of battery can only burn at 800℃.
The disadvantages of lithium iron phosphate batteries are low energy density, poor low temperature performance and high weight.
Many automakers are working hard to improve the safety of ternary lithium batteries.
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