Fuel cell and lithium ion battery hybrid system

Abstract

The invention provides a fuel cell and lithium ion battery hybrid system, which comprises a fuel cell subsystem, a lithium ion battery subsystem, a charge control subsystem, an intelligent hybrid power management system, a motor and a motor control system. A fuel cell serves as a main operation power source while a lithium ion battery serves as an auxiliary power source. The problems that the fuel cell of the pure fuel cell automobile is short in service life and the energy is unrecyclable can be solved, and the problems of long charge time, potential burning and explosion in continuous high-current discharge, attenuation and self discharge of the pure lithium ion battery electric vehicle are also solved. Service lives of the fuel cell and the lithium ion battery are effectively prolonged, the cost of the power system is reduced, reliability and safety are improved, energy recovery is realized, and accordingly the fuel cell and lithium ion battery hybrid system is an excellent solution to the power source problem of electric vehicles.

Description

technical field [0001] The invention relates to a power system of a fuel cell vehicle, in particular to a fuel cell-lithium ion battery hybrid power system. Background technique [0002] As we all know, the steam engine of the first generation power system and the internal combustion engine of the second generation power system consume a large amount of non-renewable fossil energy resources and cause serious environmental pollution. The sustainable development of human society is facing severe challenges. According to the forecast of the International Energy Agency, with economic development, social progress and population growth, the world's energy consumption will at least double in the next 20 years. Without new energy sources, the world will soon move from the current energy shortage to energy depletion. In order to solve the growing contradiction between economic development, energy shortage and environmental pollution, it has become a very urgent task to develop clea...

AI Technical Summary

Problems solved by technology

However, the fuel cell extended-range vehicle has obvious disadvantages: when the fuel cell extended-range vehicle is running, it is powered by the fuel cell alone, and the frequent load changes of the vehicle will greatly shorten the service life of the fuel cell; when the fuel is insufficient, the internal combustion engine system starts, requiring Driven by gasoline, although it can greatly increase the cruising range of the car, but at the same time there will be certain environmental pollutant emissions

The fuel cell hybrid electric vehicle has the advantages of safety, reliability, and long battery life, but the addition of supercapacitors and other accessories greatly increases the cost of the vehicle itself, and makes energy management more difficult

[0011] These fuel cell hybrid electric vehicles tend to use larger-capacity fuel cells and small-capacity secondary batteries. In order to ensure the smooth operation of the fuel cell system and the long life of the fuel cell; nor can it realize the recovery of the surplus energy of the vehicle and the fuel cell

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