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The intelligent battery temperature control system of BYD Han EV has the functions of low temperature heating, high temperature cooling, intelligent temperature balance and waste heat utilization. Among them, the ultra-low temperature heating function of the battery is mainly used to cope with the extreme cold weather below zero, and always allows the battery to maintain a \"comfortable\" temperature above 10°C to ensure its charge and discharge capacity. In addition, the \"physical defense\" is also essential, BYD for the blade battery pack \"wear\" on the special \"cotton clothes\