Hybrid power public transport super-capacitor and lithium battery parallel circuit

The invention discloses a hybrid power public transport super-capacitor and lithium battery parallel circuit which structurally comprises a super-capacitor and a lithium battery. A DC-DC converter comprising IGBT (insulated gate bipolar transistor) modules T1 and T2 and an inductor L1 is arranged between the super-capacitor and the lithium battery, one end of the inductor L1 is connected with a connecting wire of the T1 and the T2, the other end of the inductor L1 is connected with a positive electrode of the lithium battery, the T1 and the L1 form a BUCK circuit, the T2 and the L1 form a BOOST circuit, so that the super-capacitor and the lithium battery are connected in parallel, a passage of the super-capacitor is provided with a current sampling unit, and a passage of the lithium battery is similarly provided with a current sampling unit and a high-capacity energy storage capacitor which are parallelly connected to two ends of the battery. Fuel consumption of a whole vehicle is improved, the lithium battery is protected from high-current charge and discharge, the service life of the lithium battery is prolonged, fine effects can be achieved, and the parallel circuit is wide in application range.