Automobile power supply system and control method thereof

Abstract

The invention relates to an automotive power supply system and a control method thereof. The automotive power supply system comprises a vehicular power battery (1), a start-up battery (3) and a plurality of loads which respectively form a start-up circuit, a load feed circuit and a charging circuit, wherein, the start-up circuit is used for connecting a power supply loop between the vehicular power battery (1) and the loads only when the start-up circuit is connected; the automotive power supply system also comprises a charge control device (12); the charge control device (12) is used for respectively monitoring the voltages of the vehicular power battery (1) and the start-up battery (3) in a real-time manner and cutting off or connecting the charging circuit according to the monitoring result. The technical proposal adopted in the automotive power supply system and the control method thereof can charge the start-up battery at any time, so the start-up battery does not need to reserve a large mount of electrical energy, and the start-up battery which is used in the automotive power supply system and the control method thereof can adopt the battery that has smaller capacity and provides instant high current discharge, such as a nickel-cadmium battery; for the combination whole-body of the charge control device (12), the volume is small, the weight is light, the space in a vehicle chamber is saved greatly, the automotive load is lightened, and the cost is also lowered.

Description

technical field [0001] The invention relates to an automobile power supply system and a control method thereof. Background technique [0002] figure 1 Shown is the common vehicle power supply system adopted by various vehicles (pure electric vehicles, hybrid vehicles and other vehicles), this power supply system includes vehicle power battery 1, starting battery 3 and multiple loads (including normally open The load 4, the starting load 5 and the driving load 6) respectively constitute three parts of the starting circuit, the load power supply circuit and the charging circuit. The starting circuit is used to connect the charging circuit and at least part of the load power supply circuit when the car is about to start, that is, when the starting circuit is connected, that is, to enable the vehicle power battery 1 to output electric energy to supply power to at least part of the load and the starting battery 3. The load power supply circuit is used When the car is not starte...

AI Technical Summary

Problems solved by technology

[0007] Therefore existing starting battery 3 is mostly lead-acid type accumulator in order to store larger energy, usually volume is larger (at least 10 cubic decimeters), weight is heavier (at least 16 kilograms), has taken up larger space like this, Bulky and expensive

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