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Ternary lithium battery of electric vehicles. the good or good with lithium iron phosphate batteries?

by:Vglory      2020-12-05
The electric car USES is the ternary lithium batteries, specifically is the energy density of 200 wh/kg sliding ternary lithium batteries. When it comes to ternary lithium battery and lithium iron phosphate battery who is better, this will have to tell the difference between two kinds of cells. In general, the ternary polymer lithium battery is correct material using nickel cobalt manganese acid lithium or lithium nickel and cobalt aluminate ternary positive electrode material of lithium battery. There are many kinds of the anode materials for lithium-ion secondary battery, mainly include cobalt acid lithium, lithium manganese acid lithium, nickel, ternary material, lithium iron phosphate, etc. Among them as the anode material of lithium iron phosphate battery charge and discharge cycle life is long, but its drawback is that the energy density, high and low temperature performance, charge and discharge rate characteristics are there is a big gap, and the production cost is higher, the lithium iron phosphate battery technology and application has encountered the bottleneck of development. Lithium iron phosphate battery energy density low, under the condition of the same size or weight size means the battery capacity is low, thus electric vehicle range is short. In addition, in the northeast and even extreme cold place, its low temperature adaptability is poorer, adopt the batteries of electric cars are more prone to embarrassing situation could not be started. Lithium ion battery charging and discharging rate, decisions can be how quickly will the energy stored in the battery, or how quickly will the inside of the battery energy released, actually say is the efficiency of charging and discharging. It is obvious that the lithium iron phosphate battery charging and discharging efficiency and there is no advantage, instead has can't satisfy the use demand that the mainstream of the electric car now. Now electric vehicle power battery cathode material is chosen mostly for nickel cobalt manganese ( NCM) Ternary lithium batteries, depending on the ratio of materials can be divided into a variety of types such as 622 and 811. NCM811 because nickel elements occupy larger, so the energy density is higher, so it is the main research direction in future ternary lithium batteries and technological breakthrough. Nickel cobalt manganese ternary lithium battery has the advantages such as high energy density, good low temperature adaptability. Two kinds of battery no absolute good or bad, only suitable for different scenarios and markets. In the auto electric era, ternary lithium batteries both market share and the application prospect of has great superiority and forward-looking, perhaps there are more let's impressive performance in the future.
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