Super capacitor is charging device in advance

The utility model discloses a super capacitor is charging device in advance, including ultracapacitor system, voltage sensor, reference voltage, voltage comparater, first contactor, current -limiting resistor, second contactor and constant current source source, the constant current source source with charge for ultracapacitor system, voltage sensor detects ultracapacitor system both ends voltage to input to voltage comparater, voltage comparater is ultracapacitor system both ends magnitude of voltage and reference voltage magnitude of voltage size relatively, control first contactor with second contactor break -make, first contactor is parallelly connected with the second contactor after establishing ties with current -limiting resistor. The utility model discloses can effectively avoid ultracapacitor system precharge to accomplish the back, current -limiting resistor etc. Generate heat the device and continuously generate heat in the system, lead to the fact the phenomenon that the energy wasted.