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US 2019/0165388 A1Published application
Coolant purification
AssigneeIntelligent Energy Limited
InventorsPratap Rama, Mathias Crespy
Life of this patent
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Abstract
A fuel cell system comprising a fuel cell stack is disclosed. An ozone generator is configured to introduce ozone into a coolant in the fuel cell system. A deionisation apparatus is coupled to the fuel cell stack. A bypass conduit is arranged in parallel with the deionisation apparatus. A controller is configured to control flow of the coolant to the fuel cell stack through either the deionisation apparatus or the bypass conduit based on the operating state of the ozone generator.
Claims20
A method of operating a fuel cell system, the method comprising:
- introducing ozone with an ozone generator into a coolant in the fuel cell system;
- controlling flow of the coolant to a fuel cell stack in the fuel cell system with a controller,
- determining a level of ozone in the flow of the coolant;
- and
- comparing the level of ozone with a predetermined threshold level of ozone in the coolant;
- wherein the controlling of the flow of the coolant comprises directing the flow of the coolant through either a deionisation apparatus or a bypass conduit based on an operating state of the ozone generator,
- wherein the bypass conduit is arranged in parallel with the deionization apparatus and the deionization apparatus is coupled to the fuel cell stack;
- wherein the flow of the coolant is directed through the bypass conduit when the level of ozone in the coolant is above the predetermined threshold level of ozone in the coolant;
- and,
- wherein the flow of the coolant is directed through the deionisation apparatus when the level of ozone in the coolant is below a predetermined threshold level of ozone in the coolant.
7 more elements
A method of operating a fuel cell system, the method comprising:
- introducing ozone with an ozone generator into a coolant in the fuel cell system;
- controlling flow of the coolant to a fuel cell stack in the fuel cell system with a controller,
- wherein the controlling of the flow of the coolant comprises directing the flow of the coolant through either a deionisation apparatus or a bypass conduit based on an operating state of the ozone generator,
- wherein the bypass conduit is arranged in parallel with the deionization apparatus and the deionization apparatus is coupled to the fuel cell stack;
- wherein the flow of the coolant is directed through the bypass conduit during an ozone generation period and an ozone decomposition period;
- and
- wherein the ozone generation period comprises a period during which the ozone generator introduces ozone into the coolant.
4 more elements
Dependencies are inferred from the claim text.