Fuel cell system hydrogen tail exhaust valve integration method

Abstract

The invention discloses a fuel cell system hydrogen tail exhaust valve integration method which is a novel tail exhaust valve integration structure and is characterized in that S1, a tail exhaust electromagnetic valve is integrated on an end plate; S2, the valve body is tightly attached to or embedded into the end plate; the structure can realize: S3, the cooling liquid of the main cooling loop is used for heating the PTC to realize simultaneous heating of the electric pile and the hydrogen tail exhaust valve; S4, enabling heat generated by heating the PTC to enter the electric pile through a cooling loop, and providing heat 1 for the electric pile for heating the electric pile; S5, on an end plate of the electric pile, conducting a part of heat (heat 2) to the electromagnetic valve through the end plate to heat the electromagnetic valve. By adopting the method, a tail exhaust valve heating PTC (Positive Temperature Coefficient), a temperature sensor and related cables can be omitted, the structure of a fuel cell system is simplified, parts and components are reduced, the cable laying requirement is reduced, and the complexity and cost of the system are reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for integrating a hydrogen exhaust valve of a fuel cell system. Background technique [0002] Fuel cell engine is a process of converting the chemical energy of fuel and oxidant into electrical energy through chemical reaction. The energy conversion efficiency involved in this process is high. The only product in the conversion process is water, which is an environmentally friendly power device. Known as the ultimate energy source of the 21st century. The vehicle fuel cell engine system has the advantages of high efficiency, low noise, and small vibration amplitude. The fuel cell system is composed of a stack and auxiliary components. [0003] However, there are still some disadvantages in the existing fuel cell system. The traditional fuel cell system is composed of electric stacks and auxiliary components. When the ambient temperature is lower than the minimum self...

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Problems solved by technology

[0003] However, there are still some disadvantages in the existing fuel cell system. The traditional fuel cell system is composed of electric stacks and auxiliary components. When the ambient temperature is lower than the minimum self-starting temperature of the electric stack and certain auxiliary , the system cannot be started directly

In order to start the fuel cell system, it is necessary to start the heating device in the system to heat the fuel cell stack and the tail solenoid valve until the minimum cold start temperature of the stack and the tail solenoid valve is reached, and then start the system. Currently, the stack is generally used The main cooling circuit and the solenoid valve body are solved by using two PTC heaters respectively. This method needs to arrange PTC and temperature sensors on the main circuit of the stack and the exhaust valve respectively, which increases the number of parts and the complexity of control. We propose an integrated method for hydrogen exhaust valves in fuel cell systems

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