Single battery failure control method for vehicle fuel cell and controller

A fuel cell and single-cell battery technology, applied in the field of power electronics, can solve the problems of low single-cell battery voltage, membrane electrode attenuation, and danger, and achieve the effect of maintaining uniformity and not losing the power of the whole vehicle

Active Publication Date: 2019-04-16
SHANGHAI HYDROGEN PROPULSION TECH CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

In this way, during the reaction process of the fuel cell stack, the voltage of a single cell in a certain piece or area will be too low due to lack of air or flooding.
[0004] When the voltage of a single battery is too low during the operation of the fuel cell, if measures are not taken in time, the battery will appear reversed, which will cause the membrane electrode of the battery to attenuate, and even cause the proton exchange membrane to perforate. Danger

Method used

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  • Single battery failure control method for vehicle fuel cell and controller
  • Single battery failure control method for vehicle fuel cell and controller
  • Single battery failure control method for vehicle fuel cell and controller

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0043] The invention provides a method for controlling failure of a single cell of a vehicle fuel cell to improve the operation reliability of the fuel cell stack and prolong the service life of the fuel cell stack.

[0044] The single cell failure control method of the vehicle fuel cell is applied to the controller of the vehicle fuel cell; specifically, the single cell failure control method of the vehicle fuel cell is as follows figure 1 shown, including:

[0045] S101, judging whether ...

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Abstract

The invention provides a single-cell failure control method for a vehicle fuel cell and a controller. By increasing the gas flow, the hydrogen discharging frequency and the rotating speed of the hydrogen circulating pump, the voltage of the failure battery can be recovered in time as much as possible, and if the voltage of the failure battery cannot be recovered in time, the differential voltage between the voltage of the failure battery and the average voltage of the vehicle fuel cell can be controlled to be lower than a second threshold value at least. According to the method, by keeping theuniformity of the fuel cell stack, the influence on the service life of the fuel cell stack caused by too low voltage of a failure cell is prevented, and the fuel cell stack can continue to operate reliably without losing the power of the whole vehicle.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a single battery failure control method and controller of a vehicle fuel cell. Background technique [0002] Fuel cell is an electrochemical reaction device, which can be divided into many different types according to the reaction principle and reaction medium. Among them, the proton exchange membrane fuel cell is considered to be the ultimate due to its high energy conversion efficiency and fast dynamic response characteristics. Environmentally friendly vehicle power has become a widely used vehicle fuel cell. Its specific working principle is mainly to carry out an electrochemical reaction between the air passed into the cathode and the hydrogen gas passed into the anode, and then output electric energy to the outside. [0003] In specific applications, in order to increase the output current and power of vehicle fuel cells, dozens or even hundreds of fuel cells are ...

Claims

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Application Information

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IPC IPC(8): H01M8/04537H01M8/04664H01M8/04746H01M8/04858
CPCH01M8/04552H01M8/04671H01M8/04753H01M8/0494H01M2250/20Y02E60/50
Inventor 陈骏夏增刚余意蔡俊
Owner SHANGHAI HYDROGEN PROPULSION TECH CO LTD
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