Energy recycling system and method for liquid hydrogen fuel cell car

Abstract

The invention discloses an energy recycling system and method for a liquid hydrogen fuel cell car. The system comprises a superconducting coil, a superconducting switch, a full-bridge type direct current chopper, a superconducting current lead, a direct current link capacitor, a DC-AC bilateral transducer, a vehicle-mounted motor and a measurement and control system, wherein the superconducting coil is immersed in a liquid hydrogen container, the superconducting switch and the full-bridge type direct current chopper are installed in a low-temperature Duval, and the superconducting current lead, the direct current link capacitor, the DC-AC bilateral transducer, the vehicle-mounted motor and the measurement and control system are arranged in a low-temperature hydrogen pipeline. The superconducting current lead is used for connecting the superconducting coil, the superconducting switch and the full-bridge type direct current chopper. The low-temperature hydrogen pipeline is used for connecting a liquid hydrogen fuel cell, the liquid hydrogen container and the low-temperature Duval. Compared with the prior art, the energy recycling system has the advantages that the superconducting coil is cooled directly through vehicle-mounted liquid hydrogen, the superconducting current lead, the superconducting switch and the full-bridge type direct current chopper are cooled directly through the low-temperature hydrogen produced through gasification of the vehicle-mounted liquid hydrogen, a supermumetal energy storing device is actually used in the liquid hydrogen fuel cell car, the brake energy recycling and reutilizing ratio of the car is improved, and staring time and accelerating time of the car are shortened.

Description

technical field [0001] The invention belongs to the technical field of energy recovery and recycling, and in particular relates to a system and method for efficient energy recovery and reuse of liquid hydrogen fuel cell vehicles. Background technique [0002] With the increasing consumption of oil resources, the automobile industry is facing two major problems, the shortage of oil resources and the aggravation of environmental pollution. In recent years, new energy vehicles have become a new direction of automobile development and are expected to become the mainstream direction in the future; among them, fuel cell vehicles using high-pressure hydrogen or low-temperature liquid hydrogen as fuel are gradually being introduced to the market. In order to improve vehicle energy utilization efficiency, current fuel cell vehicles are often equipped with battery devices to recover vehicle braking energy; however, the repeated charging and discharging times and service life of the ba...

AI Technical Summary

Problems solved by technology

[0004] The energy absorption and release process of the superconducting magnetic energy storage device needs to be equipped with an additional DC chopper, but the existing traditional DC chopper and full-bridge DC chopper cannot directly and effectively work in liquid hydrogen fuel cells. on the car

The traditional DC chopper consists of two insulated gate bipolar transistors or metal-oxide-semiconductor field effect transistors, and two power diodes, which are suitable for high-voltage applications (such as 500V or above); due to the power diodes Influenced by the inherent conduction voltage drop, the operating efficiency of traditional DC choppers in medium and low voltage applications (such as below 500V) is low

The full-bridge DC chopper composed of four metal-oxide-semiconductor field-effect transistors has high operating efficiency in low-voltage applications (such as 250V or below), but the operating efficiency in medium- and high-voltage applications above 250V lower

However, the typical operating voltage of liquid hydrogen fuel cell vehicles is between 250-500V, and the existing traditional DC chopper and full-bridge DC chopper cannot directly and effectively improve the operating efficiency of the superconducting magnetic energy storage device, and cannot achieve Efficient Energy Recovery and Utilization

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