High-power direct-current charging machine/pile DC-DC conversion device for electric automobile and control method of high-power direct-current charging machine/pile DC-DC conversion device

Abstract

The invention discloses a high-power direct-current charging machine / pile DCDC conversion device for an electric automobile and a control method of the high-power direct-current charging machine / pile DCDC conversion device. A multiphase interleaving voltage decrease and increase adjustment technology is adopted in the device, the requirements for adjustment of wide voltage input and wide voltage output are met, and through the modularized control structure design, the output of charging energy can be controlled, the output ripples can be reduced, and power and efficiency are improved. The output voltage and the current of the device can both be controlled, and the device has the protection functions of current protection, voltage protection, temperature protection, power protection, drive short circuit protection and the like; and a pre-starting current limiting module, a charging pre-starting and discharging protection module, a hardware overcurrent protection module and a fault signal processing module are additionally arranged, so that the safe reliability of the device is effectively enhanced. The device is small in ripple, high in conversion efficiency, low in cost, simple in structure, small in start current and high in safe reliability, the device can be used for high-power direct-current charging machine / pile DCDC power conversion for the electric automobile and also be used for other power and power supply equipment, and the device is suitable for being used in various power and electronic fields.

Description

technical field [0001] The invention relates to the technical field of high-power DC charging for electric vehicles, in particular to a high-power DC charger / pile DC-DC conversion device and a control method for electric vehicles. Background technique [0002] With the continuous development of the world economy, the total number of automobiles continues to rise, the non-renewable energy continues to decrease, and the two major problems of energy crisis and environmental pollution have become increasingly prominent. Promoting the rapid development of new energy and new energy vehicles has become a top priority. [0003] At present, electric energy is the best alternative energy source for petroleum resources. It is clean, environmentally friendly, energy-saving and efficient. In addition to conventional coal-fired power generation, it can also be obtained by making full use of solar energy, wind energy, tidal energy, and biomass energy. The pollution problem offers a very g...

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a low-volume, low-cost, simple-structure, high-efficiency, high-power, and high-reliability device for the defects of low conversion rate, complex structure, and poor safety and stability in the prior art. , the controllable output adapts to the high-power DC charger / pile DCDC conversion device and control method of electric vehicles

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