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A fuel cell system and a fuel cell system control method

A fuel cell system and fuel cell technology, applied in the direction of fuel cells, battery circuit devices, circuits, etc., can solve the problems of system voltage overshoot, disconnection, etc.

Active Publication Date: 2022-07-12
GREE ELECTRIC APPLIANCES INC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiment of the present application is to provide a fuel cell system and a fuel cell system control method to solve the problem that the current fuel cell system directly disconnects the voltage output terminal when entering the shutdown procedure, resulting in a voltage overshoot in the system

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  • A fuel cell system and a fuel cell system control method
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  • A fuel cell system and a fuel cell system control method

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Embodiment Construction

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0043] Since the current fuel cell system directly disconnects the voltage output terminal when entering the shutdown procedure, there is no current flow in the system, and the voltage converter cannot perform chopper control, so the output voltage is the input voltage. The voltage overshoots, thereby damaging the device and shortening the service life of the fuel cell. To this end, an embodiment of the present application provides a fuel cell system. ...

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Abstract

The present application provides a fuel cell system and a fuel cell system control method, belonging to the technical field of fuel cells. In the present application, the system includes: a fuel cell, a voltage converter, a load terminal, a voltage output terminal, a first switch and a second switch, wherein the power value of the load terminal is smaller than the power value of the voltage output terminal; the The output end of the fuel cell is connected with the input end of the voltage converter, the output end of the voltage converter is connected with the voltage output end through the first switch, and the output end of the voltage converter is connected with the voltage output end The load terminal is also connected between the first switches through the second switch. Therefore, the load terminal can be used to consume the remaining hydrogen inside the fuel cell during the shutdown phase, and at the same time, the voltage overshoot in the system can be avoided.

Description

technical field [0001] The present application relates to the technical field of fuel cells, and in particular, to a fuel cell system and a fuel cell system control method. 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. It is the fourth power generation technology after hydropower, thermal power and atomic power. [0003] Due to the soft output characteristics of the fuel cell, with the increase of the load current, the voltage drops and the ratio of the drop is more than that of the general battery, which makes it difficult for the fuel cell to match different types of voltage output terminals. Therefore, the fuel cell is generally used together with a voltage converter in practical applications. The fuel cell, the voltage converter and the voltage output terminal form a fuel cell system. In this system, the voltage converter can effectivel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04858H02J7/00
CPCH01M8/04865H02J7/0063H02J7/00712Y02E60/50
Inventor 倪梓荣黄文英肖彪张威刘智亮
Owner GREE ELECTRIC APPLIANCES INC
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