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Coolant injection controller for fuel cell system

A fuel cell system and fuel cell technology, applied in the direction of fuel cells, electrochemical generators, circuits, etc., can solve the problems of icing of fuel cell systems and limited battery power.

Active Publication Date: 2017-10-13
INTELLIGENT ENERGY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, battery power is limited, and if the battery fails or discharges, the fuel cell system can experience icing

Method used

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  • Coolant injection controller for fuel cell system
  • Coolant injection controller for fuel cell system
  • Coolant injection controller for fuel cell system

Examples

Experimental program
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Embodiment Construction

[0048] The drawing shows a fuel cell system 1 comprising a fuel cell assembly 2 and a coolant storage module 3 . In this example, the fuel cell assembly 2 comprises a fuel cell stack comprising a plurality of proton exchange membrane fuel cells stacked together. The fuel cell assembly 2 comprises an evaporatively cooled fuel cell assembly. In this example, the coolant comprises water, but it will be appreciated that other coolants may be used, such as glycol or an aqueous solution. In this example, the coolant or water storage module 3 stores pure water for hydration and / or evaporative cooling of the fuel cell assembly 2 .

[0049] In the event of freezing conditions, the water in module 3 may freeze. The system 1 may not include or may not use auxiliary heaters to maintain temperatures above zero when the system 1 is powered down. When restarting the system 1 , water may be required for cooling the fuel cell stack 2 and / or for hydration of the fuel cell membranes of the fu...

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PUM

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Abstract

The invention discloses a coolant injection controller for a fuel cell system, the coolant injection controller is configured to actively control the flow of a coolant to a fuel cell assembly for cooling and / or hydrating the fuel cell assembly in response to a measure of fuel cell assembly performance, wherein the coolant injection controller is configured to provide for a first mode of operation if the measure of fuel cell assembly performance is below a predetermined threshold and a second mode of operation if the measure of fuel cell assembly performance is above the predetermined threshold, the first and second modes having different coolant injection profiles and wherein, in the first mode of operation, the coolant injection profile provides for control of the flow of coolant by alternating between at least two different injection flow rates.

Description

technical field [0001] The present invention relates to a method of operation of a fuel cell system comprising a fuel cell assembly and a coolant storage tank. The present invention also relates to a fuel cell system comprising the fuel cell assembly and a coolant storage tank. Background technique [0002] Conventional electrochemical fuel cells convert fuel and oxidant into electrical energy and reaction products. A common type of electrochemical fuel cell includes a membrane electrode assembly (MEA) comprising a polymeric ion (proton) transfer membrane and a gas diffusion structure between an anode and a cathode. A fuel (such as hydrogen) and an oxidant (such as oxygen from the air) pass through respective sides of the MEA to produce electricity and water as reaction products. A stack may be formed comprising several such fuel cells arranged with separate anode and cathode fluid flow paths. Such stacks are usually in the form of blocks comprising a number of individual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0432H01M8/04537H01M8/04701H01M8/0438H01M8/04828
CPCH01M8/04328H01M8/04335H01M8/04358H01M8/04552H01M8/04619H01M8/04723H01M8/04417H01M8/0494Y02E60/50H01M8/04134H01M8/04253H01M8/04268H01M8/0432H01M8/04544H01M8/04559H01M8/04768H01M2008/1095H01M8/0258H01M8/0267H01M8/04537H01M8/04701
Inventor S·莫海密N·帕尔默V·加德纳S·福斯特P·拉玛
Owner INTELLIGENT ENERGY LTD