What are the subsystems of electric vehicles and their interactions

2023-03-24 681

The electric vehicle subsystem mainly consists of electric drive control system, car chassis, body, and various auxiliary devices. Except for the electric drive control system, the functions and structural composition of other parts are basically similar to traditional cars, but some components have been simplified or omitted depending on the selected driving method.
Which subsystems can the pure electric vehicle structure be divided into
Electric drive subsystem, main energy subsystem, and auxiliary control subsystem.
The electric drive system includes electronic controllers, power converters, electric motors, mechanical transmission devices, and wheels. Its function is to efficiently convert the electrical energy stored in the battery into the kinetic energy of the wheels, and to charge the battery by converting the kinetic energy of the wheels into electrical energy when the car decelerates and brakes. The power system includes a power supply, energy management system, and charger, whose main functions are to provide driving energy to the motor, monitor power usage, and control the charger to charge the battery.
Pure electric vehicle system: auxiliary system
Auxiliary systems include auxiliary power sources, power steering systems, navigation systems, air conditioners, lighting and defrosting devices, wipers, radios, and more, to enhance the handling of the car and the comfort of the occupants.
Pure electric vehicle system: battery pack system
The battery pack system, including battery pack and management system, namely battery package and BMS, is the energy source of electric vehicles. The current mainstream of battery cells are Lithium iron phosphate sub batteries, ternary lithium ion batteries, etc.


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