Fuel cell stack for cold start in motor vehicle internal combustion engine, consists of polymer electrolyte membranes with channel structures for guiding process gases and coolant

摘要

Devices regulate flow of coolant in a fuel cell stack. During the stack's cold start, controllers/valves (3,4) allow a flow through only part of the available cells (7) in the stack. This provokes an electrochemical reaction relatively quickly and generates a reaction heat. An independent claim is also included for a method for controlling cold start behavior in a fuel cell stack.