Auxiliary energy storage control device of fuel battery

Abstract

The invention is concerned with the fuel cell energy storing controlling assistance equipment, includes: the super capacitor bank, the double direction direct-direct current convertor, the current detective element, the current flow control element, and the voltage control element. It is: the super capacitor bank connects to the direct current busbar of the fuel cell through the double direction direct-direct current convertor; the current detective element passes the sampling loading current to the current control element by filtering, the voltage control element pass the sampling the voltage of the super capacitor bank to the current control element by adjusting, and the current control element conducts charging or discharging to the super capacitor bank after generates the algebraic sum of the two signal mentioned earlier, as the reference current control double direction direct-direct current convertor. The invention insures the operation security and the product life cycle of the fuel cell by changing the current of the fuel cell slowly when the loading disturbing, under the requirement of loading; and it improves the utilance of the super capacitor bank through charging or discharging by the double direction direct-direct current convertor.

Description

technical field [0001] The invention relates to an energy control device for a fuel cell power generation system, in particular to an auxiliary energy storage control device for a fuel cell. Background technique [0002] In the fuel cell power generation system, some control parameters that are closely related to the operation of the fuel cell, such as air pressure, gas flow, and humidity, are controlled by mechanical devices, resulting in a slow dynamic response of the fuel cell, which cannot meet the needs of load disturbances. At the same time, the load The disturbance of the fuel cell will also cause the local temperature or humidity in the fuel cell to exceed the normal range, threatening the working safety of the fuel cell. At present, the auxiliary energy storage control device of the fuel cell mostly uses a supercapacitor bank directly connected in parallel to the output end of the fuel cell. When the load is disturbed, the high-frequency load current enters the supe...

AI Technical Summary

Problems solved by technology

In this structure, because the discharge range of the supercapacitor bank is very wide, and here is limited by the DC bus voltage in the fuel cell power generation system, the utilization rate of the supercapacitor is often not high, and the controllability of the energy in the supercapacitor is poor. , can not guarantee the working safety of the supercapacitor

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