The role of DC/DC converters in new energy electric vehicles

The role of DC/DC converters in new energy electric vehicles

Table Of Contents

New energy electric vehicle DC converter, also known as on-board DC converter, is a voltage conversion device fixedly installed on electric vehicles. Perhaps most people do not know much about DC converters and do not know what their specific functions are.

So, what is the role of DC converters in electric vehicles? Below I will introduce on-board DC converters through this article

For electric vehicles, DC converters are equivalent to generators for fuel vehicles. They can convert high-voltage DC output from power batteries into low-voltage DC power of 12V, 24V or 48V, which can power low-voltage electrical equipment on the vehicle and charge the small battery of the vehicle.

The power of the on-board DC converter comes from the high-voltage battery pack of the electric vehicle. The input is high-voltage DC power and the output is low-voltage DC power. If the high-voltage battery pack is out of power, the DC converter will not work.


It mainly provides sufficient power for the air conditioning system, multimedia system, lighting system and steering system of electric vehicles. It is a very important part of the vehicle. Because the voltage of the power battery of the electric vehicle is different from the voltage of the electronic equipment, a DC converter is needed to convert the voltage.

DC converters fixedly installed in the car.
Before 2017, on-board DC converters were installed in electric vehicles as independent devices. Later, with the continuous advancement and development of technology, in 2018, DC-DC converters began to be integrated with on-board chargers, which saved more space in the vehicle and improved conversion efficiency.
According to data from the China Association of Automobile Manufacturers, my country’s sales of new energy electric vehicles increased from 507,000 in 2016 to 3.521 million in 2021. The rapid growth in production and sales of electric vehicles has driven the market development of DC converters.

In short, the DC/DC converter plays a vital role in new energy electric vehicles. It is a bridge connecting the high-voltage power battery system and low-voltage electrical equipment, ensuring the stable operation and efficient energy utilization of various electrical systems of the vehicle.


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