A fuel cell dc/dc conversion device and control method thereof

A technology of fuel cell and conversion device, which is applied in the direction of output power conversion device, electric variable adjustment, control/regulation system, etc., and can solve the problems affecting the normal operation of the system and the life of the system

Active Publication Date: 2018-01-02
WUHAN TROOWIN POWER SYST TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a short-term reciprocating restart will affect the normal operation of the system and the life of the system

Method used

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  • A fuel cell dc/dc conversion device and control method thereof

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Embodiment Construction

[0036] The invention provides a fuel cell DC / DC conversion device, which includes a Boost chopper circuit (2) for realizing voltage boosting and a full-bridge DC converter (3) for realizing isolation and voltage reduction; it also includes detecting the fuel cell output The detection circuit (5) of voltage and Boost output voltage, the detection circuit (7) of detection system output voltage current, and the controller (6) of system; The input of described Boost chopper circuit (2) and the output of fuel cell The DC bus (1) is connected, the output of the Boost chopper circuit (2) is connected to the full-bridge DC converter (3); the output of the full-bridge DC converter (3) is connected to the communication load (4), and the full-bridge The input of the DC converter (3) is connected to the Boost chopper circuit (2); the detection circuit (5) includes a voltage detection I (5.1) for detecting the output voltage of the fuel cell and a boost chopper circuit for detecting (2) Th...

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Abstract

A fuel cell DC / DC conversion device and its control method, the device includes a boost chopper circuit for boosting voltage, and a full-bridge DC converter for isolation and voltage reduction, the input terminal of the boost chopper circuit is connected to In the fuel cell, the output end is connected to the full-bridge DC converter, and the output end of the full-bridge DC converter is connected to the load circuit. When the output voltage of the fuel cell is between the open-circuit voltage of the fuel cell and a preset value, the step-up chopper The circuit stops working, and the full-bridge DC converter performs power conversion for the load circuit. When the output voltage of the fuel cell is lower than the preset value Vr1, the boost chopper circuit increases the output voltage of the boost chopper circuit to the preset value. When the output voltage of the fuel cell is lower than the preset value Vr2, the DC / DC conversion device will reduce the output so that the voltage of the fuel cell is not lower than the preset value Vr2.

Description

technical field [0001] The invention relates to a DC / DC conversion device, in particular to a DC / DC conversion device of a fuel cell and a control method thereof. Background technique [0002] A fuel cell is a device that converts chemical energy stored in fuel and oxidant directly into electrical energy. When a fuel cell is continuously supplied with fuel and oxidant from the outside, it can generate electricity continuously. Fuel cell backup power has already begun to be used in some industries such as the communication industry. Although the fuel cell generates direct current, the voltage range fluctuates greatly with the load, so the fuel cell generally does not directly supply power to the communication load. In the existing technology, the direct current generated by the fuel cell is usually converted to a communication load by DC / DC. When the open circuit voltage of the fuel cell is higher than the communication power supply voltage and the rated operating voltage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
Inventor 左彬李骁赵锋
Owner WUHAN TROOWIN POWER SYST TECH
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