A dcdc output current control system based on fuel cell
A technology of output current and control system, applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problems of inability to monitor the working state of fuel cells, waste of energy, shorten the service life of stacks and secondary batteries, etc., to prevent overcharging , Prevent the charging current from being too large and reduce the effect of performance degradation
Active Publication Date: 2021-04-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
However, the fuel cell work control system in the prior art cannot accurately monitor the overall working state of the fuel cell, which reduces the service life of the stack and the secondary battery and wastes energy.
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[0018] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:
[0019] Such as figure 1 A fuel cell-based DCDC output current control system shown includes a control circuit 109, the general control terminal that controls the operation of the system; a secondary battery 108 that provides electric energy for the system components 106 or provides electric energy for the external load 103 of the system or is charged The electric stack 107 that converts the chemical energy of the fuel into electric energy; the voltage sensor 111 that measures the secondary battery voltage; the electric stack voltage sensor 110 that measures the electric stack voltage; the current sensor 105 that measures the secondary battery current; The stack output current sensor 104; the...
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The invention discloses a DCDC output current control system based on a fuel cell. The DCDC output current control system comprises a main control end, namely, a control circuit, for controlling the operation of the system, a secondary battery used for providing electric energy for system parts or providing electric energy or a charged secondary cell for an external load of an external system, a stack used for converting chemical energy of the fuel into electric energy, a voltage sensor for measuring the voltage of the secondary cell, a stack voltage sensor for measuring the stack voltage, a current sensor for measuring the current of the secondary cell, a stack output current sensor used for measuring stack output current, an electric energy conversion device DCDC used for converting theelectric energy output by the stack into electric energy consistent with the voltage of the secondary cell, and an output current sensor used for measuring an output of the fuel cell system to the external load of the system, wherein the DCDC can be controlled by the control circuit to be used for adjusting the output current of the DCDC. According to the control system, the phenomena of life attenuation, heating, explosion and the like caused by overcharge of the secondary cell are prevented, the fuel cell stack is protected, and the life attenuation of the fuel cell stack is reduced.
Description
technical field [0001] The invention relates to the field of fuel cell system control, in particular to a fuel cell-based DCDC output current control system. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. Since the fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electrical energy through an electrochemical reaction, it is not limited by the Carnot cycle effect, so the efficiency is high; the fuel cell uses fuel and oxygen as reactants, and there is no Mechanical transmission parts, so there is no noise pollution, and very little harmful gas is discharged. It can be seen that from the perspective of energy conservation and environmental protection, fuel cells are the most promising power generation technology. When the fuel cell is working, it not only needs to output electric energy to the outside, but also ...
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IPC IPC(8): H01M8/04858
CPCH01M8/0488H01M8/0491Y02E60/50
Inventor 杨林林安禹臣孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI