A vehicle-mounted composite power supply for hybrid electric vehicles
A hybrid electric vehicle and composite power supply technology, applied in electric vehicles, collectors, electrical components, etc., can solve the problems of fuzzy control rules, difficulty in online adjustment, and difficulty in automatic acquisition, so as to reduce the number of charge and discharge cycles and avoid large The effect of current shock and small change range
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0022] A vehicle-mounted composite power supply structure applied to hybrid electric vehicles of the present invention adopts a power battery directly connected to a load, and a supercapacitor is connected in parallel with a DC / DC converter in series and then connected in parallel with the power battery; this structure directly outputs power and energy from the power battery The conversion efficiency is high; as an auxiliary energy source, the supercapacitor detects the terminal voltage of the power battery through DC / DC tracking, and adjusts its own voltage to match the work of the power battery, thereby protecting the power battery; Voltage regulation is easy to implement.
[0023] The bidirectional DC / DC converter adopts a non-isolated half-bridge structure, which has a small number of components, low cost, no transformer loss, high efficiency, and easy pa...
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