Fuel cell test and lithium ion battery formation capacity grading coupling system and method

Abstract

The invention discloses a fuel cell test and lithium ion battery formation capacity grading coupling system. The system comprises a fuel cell test unit, an energy storage battery, a lithium ion battery formation and capacity grading unit, an energy storage bidirectional inverter and an energy management unit; the energy management unit is in communication connection with the fuel cell test unit, the energy storage cell, the lithium ion battery formation capacity grading unit and the energy storage bidirectional inverter. The energy storage cell is electrically connected with the fuel cell testunit, the lithium ion battery formation capacity grading unit and the energy storage bidirectional inverter. The invention also discloses a control method of the fuel cell test and lithium ion battery formation capacity grading coupling system. According to the invention, the energy waste that the conventional resistive load consumes the electric energy generated by the fuel cell system through heat energy is avoided, and meanwhile, the additional electric energy consumption for the resistive load cooling equipment is also saved.

Description

technical field [0001] The invention relates to the technical field of fuel cell testing, in particular to a system and method for capacitively coupling fuel cell testing and lithium-ion battery composition. Background technique [0002] Large-scale research, verification and testing of fuel cell stacks, fuel cell systems and fuel cell engines are essential steps before fuel cell applications. Since the fuel cell itself is a power generation device that continuously consumes hydrogen, the first solution in the traditional performance testing process is to use a resistive load to consume the electric energy generated by the fuel cell system through heat energy, resulting in a waste of resources and an increase in cost . In addition, the commonly used electronic loads also need cooling towers, large fans, and even air conditioners to dissipate heat during the process of releasing heat energy to ensure the normal operation of the electronic loads, thus requiring additional ele...

AI Technical Summary

Problems solved by technology

However, the conversion efficiency of hydrogen into electricity during the operation of the fuel cell is generally 50% (based on the low calorific value LHV of hydrogen), while the theoretical electrolysis efficiency of the generated electricity to produce hydrogen through electrolysis of water is very high (the apparent conversion efficiency even It can reach 100%~122%), but in the industry, in order to increase the rate of hydrogen production, it is necessary to heat up and generate polarization overpotential and other factors, and the power conversion efficiency is only 50~70%.

Then the efficiency of a complete cycle of hydrogen → fuel cell → electrolyzer → hydrogen is only 30%, the energy loss exceeds 70%, the energy utilization rate is extremely low, and the cost of the hydrogen production system by electrolysis of water (especially the precious metal platinum or iridium as the catalyst) The solid electrolyte membrane water electrolysis hydrogen production system) is higher and the life is shorter

Therefore, this scheme is not economical, and there are problems of complex system and complicated maintenance

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