Center control power source charging circuit of electric four-wheel vehicle

Abstract

The invention belongs to a control system of an electric four-wheel vehicle and provides a center control power source charging circuit of the electric four-wheel vehicle. The center control power source charging circuit of the electric four-wheel vehicle is provided with a battery pack used for the whole vehicle; the positive pole output of the battery pack is electrically connected with a control port of a DC-DC converter through an ignition switch; the DC-DC converter (4) is provided with a main voltage output end and an auxiliary voltage output end; the main voltage output end is connected with other electrified devices (7) of the whole vehicle and then electrically connected with the public output end of the DC-DC converter; the auxiliary voltage output end is connected with a center control lock controller charging loop; the center control lock controller charging loop is provided with a center control lock controller (5) and a storage battery (6). Normal working of other electrified devices of the whole vehicle is guaranteed, and the center control lock small storage battery can be better charged.

Description

technical field [0001] The invention belongs to a control system of an electric four-wheel vehicle, in particular to a charging circuit for a central control power supply of an electric four-wheel vehicle. Background technique [0002] After the central locking function is added to the small electric four-wheel vehicle, in order to make this part of the circuit work normally, it is usually necessary to design an auxiliary power supply to supply power to this part of the circuit. [0003] There are two main methods commonly used in the market at present: [0004] 1. Adopt a DC converter with dual output but only one voltage level function for the output voltage. After the ignition switch is turned off, the DC converter can still output one voltage to supply power for the central control lock. The advantages of this solution are simple and convenient system and low cost; disadvantages This is because when the emergency stop switch of the whole vehicle is turned off, the DC co...

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Problems solved by technology

The disadvantage is that because the DC converter also needs to supply power to other electrical equipment in the vehicle, the output voltage should not exceed the rated voltage of the electrical device too much, so it cannot guarantee that the small battery of the central lock can be fully charged

[0006] At present, the above two methods are basically adopted in the market of small electric four-wheel vehicles. Because the above two solutions have corresponding shortcomings, they may cause corresponding problems.

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