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2021-12-03
The reason is that the energy ratio is higher than that of the new energy vehicle sales market, and the bigger reason is that its specific energy is higher than that of lithium-ion battery rechargeable batteries.
In this regard, many people may question that new energy vehicle manufacturers would rather give up safer lithium phosphate rechargeable batteries and explore options for ternary lithium-ion batteries in order to make a profit.
In fact, lithium phosphate rechargeable batteries are not the best choice. According to the materials shown in the bik battery, the lithium-ion battery of the 18650 rechargeable battery is 232wh/kg longer than the energy, while the lithium phosphate rechargeable battery is hovering around 170-190wh/kg, plus more energy, smaller Capacity, lighter mass, richer and more flexible, this is unparalleled.
Of course, this is the cold resistance of the power lithium battery. As we all know, the endurance performance of battery cars in the natural environment of average winter temperature is even more testicular pain, and most of them can only give full play to part of the battery characteristics. However, the main performance of lithium-iron-phosphate batteries and lithium-ion batteries at ultra-low temperatures are different. Data shows that lithium-iron-phosphate batteries at 20°C are only 54% of normal temperature, and lithium-ion batteries are still the main Performance can reach 70% of normal temperature. In terms of cold resistance, lithium-ion batteries have better advantages, which is equivalent to their own insufficient thermal resistance.