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Method for maximum net power calculation for fuel cell system based on polarization curve estimation

一种燃料电池、燃料电池堆的技术，应用在燃料电池、电路、测量电等方向，能够解决膜电极组件造价昂贵等问题

Inactive Publication Date: 2009-09-16
GM GLOBAL TECH OPERATIONS LLC
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  • Abstract
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Problems solved by technology

MEAs are relatively expensive to manufacture and require certain conditions to work effectively

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  • Method for maximum net power calculation for fuel cell system based on polarization curve estimation
  • Method for maximum net power calculation for fuel cell system based on polarization curve estimation
  • Method for maximum net power calculation for fuel cell system based on polarization curve estimation

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Embodiment Construction

[0013] The following discussion of an embodiment of the invention that utilizes an online polarization curve estimation process to determine the maximum net power available from a fuel cell system as the fuel cell stack degrades over time is merely exemplary in nature, and is determined to It is not intended to limit the invention or its application or uses.

[0014] Many control parameters of the fuel cell system require knowledge of the polarization curve of the fuel cell stack, such as knowledge of the maximum voltage potential and current draw available from the fuel cell stack. As mentioned above, as the stack ages, the stack polarization curve also changes as a result of stack degradation. U.S. Patent Application Serial No. 11 / 669,898, entitled "Algorithm for Online Adaptive Polarization Curve Estimation of a Fuel Cell Stack," filed January 31, 2007, discloses a method for calculating the value of a fuel cell stack on-line while the fuel cell system is operating. Algori...

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Abstract

The invention realtes to a method for maximum net power calculation for fuel cell system based on polarization curve estimation. An algorithm for determining the maximum net power available from a fuel cell stack as the stack degrades over time using an online adaptive estimation of a polarization curve of the stack. The algorithm separates the current density range of the stack into sample regions, and selects a first sample region from the far left of the estimated polarization curve. The algorithm then calculates the cell voltage for that current density sample region, and determines whether the calculated cell voltage is less than or equal to a predetermined cell voltage limit. If the calculated cell voltage is not less than the cell voltage limit, then the algorithm selects the next sample region along the polarization curve. When the calculated cell voltage does reach the cell voltage limit, then the algorithm uses that current density for the sample region being analyzed to calculate the maximum power of the fuel cell stack.

Description

technical field [0001] The present invention relates generally to an algorithm for determining the maximum available power from a fuel cell stack as it degrades over time, and more particularly, to a method for using online polarization curve estimation as the fuel cell stack degrades over time. procedure to determine the maximum power available from the fuel cell stack. Background technique [0002] Hydrogen is an attractive fuel because it is clean and can be used efficiently in fuel cells to generate electricity. A hydrogen fuel cell is an electrochemical device that includes a cathode and an anode with an electrolyte in between. The anode receives hydrogen and the cathode receives oxygen or air. Hydrogen gas is dissociated at the anode to produce free hydrogen protons and electrons. Hydrogen protons travel through the electrolyte to the cathode. Hydrogen protons react with oxygen and electrons at the cathode to produce water. Electrons from the anode cannot pass thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCH01M8/04619H01M8/04582H01M8/04552Y02E60/50H01M8/04641H01M8/04992
Inventor J·P·萨尔瓦多S·加纳帕蒂K·马拉瓦拉普F·X·莱奥B·拉克什马南
Owner GM GLOBAL TECH OPERATIONS LLC
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