Electrical system and working method of a hybrid electric vehicle

Abstract

The invention relates to the field of new energy vehicles, and particularly discloses an electrical system of a hybrid electric vehicle. The electrical system comprises an electric motor, a motor controlling assembly, a high-voltage battery pack, a battery managing system, a power generator and an engine, the power generating unit uses oxidation reduction to generate voltage to supply power to thelow-voltage part of the electrical system, the power generating unit is connected to each coolant pipe outside a water-cooled motor and a motor controller, oxidation reduction is conducted on an electrolyte solution, meanwhile, the electrolyte solution is also used as a coolant to flow in the coolant pipes, and cooling of the electric motor, the motor controlling assembly, the power generator andthe engine is achieved. In addition, the invention further discloses a working method of the electrical system of the hybrid electric vehicle. According to the electrical system, the vehicle weight can be reduced, the costs are saved, the equivalent energy density of a storage battery system is improved, and the endurance mileage of the hybrid electric vehicle is improved.

Description

technical field [0001] The invention belongs to the field of new energy vehicles, and in particular relates to an electrical system of a hybrid vehicle and a working method thereof. [0002] technical background [0003] Hybrid vehicles are divided into plug-in hybrid vehicles and conventional hybrid vehicles. According to the route of power transmission, traditional hybrid vehicles are divided into three categories: series, parallel and hybrid. When the vehicle is running in series hybrid, the engine does not directly drive the wheels, but the engine drives the generator to charge the battery, and the battery drives the motor to drive the vehicle; in parallel hybrid, the engine is used as the main power source of the vehicle. When it is relatively stable, the engine drives the vehicle, while in unstable conditions such as starting and rapid acceleration, the electric motor works as auxiliary power; plug-in hybrid electric vehicles can charge the battery through the external...

AI Technical Summary

Problems solved by technology

[0006] The electrical system of a hybrid electric vehicle includes a high-voltage electrical part and a low-voltage electrical part. The high-voltage part is composed of a high-voltage battery pack, a high-voltage part of the motor controller, a generator and an electric motor. The power supply of the low-voltage part generally uses a 12V battery as the low-voltage part of the motor controller. , battery management system, wiper lights and other low-voltage loads supply power, and the 12V battery is charged through the feedback braking energy of the motor; the disadvantage is that the braking recovery rate is low and the feedback energy is small

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