It is to configure a special independent PTC for the battery, which is used to heat the battery separately.
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Electric vehicles need to protect the battery at low temperatures, so the charging speed will slow down at -5 ° C. There is this relationship between the charging power limit and the cell temperature: 0℃, about 5kW 0-5℃, 10kW5-15℃, 45kW20℃, basically entering the full power stage, at this time according to the difference of the charging pile, to adjust the charging current.
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Battery heating requires non-dedicated PTC, that is, battery heating through system heat transfer. For example, the air conditioning PTC is first used to heat the cabin coolant, and then the heat in the cabin loop coolant is transferred to the battery pack through the heat exchanger.
Temperature control chip design, 2 times per second real-time monitoring temperature, so that the charging head always keep low temperature charging. When the phone battery is less than 80%, it automatically opens the fast charge mode, and when the phone battery is charged to 80%, it automatically switches to trickle charging, intelligent protection of the battery, low temperature charging is safe and does not harm the phone, and the fast charge time is 0.5h to complete 80% of the electricity