A fuel cell thermal management system for vehicles

Abstract

The invention discloses a thermal management system of a fuel cell for a vehicle. A cold plate is arranged in a fuel cell stack, the cold plate, a low-temperature radiator and an electronic water pumpsequentially communicate with each other via a pipeline, a cooling liquid flows in a part and the pipeline in a circulation way, temperature sensors are arranged at an inlet and an outlet of the coldplate, an electronic fan is arranged at an outer side of the low-temperature radiator, an electric heating pipe and a cooler are arranged in the low-temperature radiator and are arranged in parallel,the fuel cell stack is connected with a hydrogen inlet pipeline, an air inlet pipeline and an exhaust pipeline, solenoid valves are arranged on the air inlet pipeline and the air inlet pipeline, andthe solenoid valves, the electronic water pump, the temperature sensors, the electronic fans and the electrical heating pipe are all controlled by a controller. By the thermal management system, the narrow amplitude of a working temperature of the cell stack can be controlled to be 80+ / -3 DEG C, energy-saving and high-efficiency management is achieved, an appropriate temperature and temperature balance which are required by electrochemical reaction of the cell are ensured, and the power generation efficiency of the fuel cell is improved.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell thermal management system for vehicles. Background technique [0002] Fuel cell thermal management is mainly the management of battery operating temperature, that is, to ensure the normal and efficient progress of the chemical reactions in the fuel cell stack. In the current management of battery temperature, when the ambient temperature is -40°C to 40°C, the temperature inside the fuel cell stack is often unable to maintain the optimum operating temperature range, resulting in low battery power conversion efficiency and the risk of thermal runaway The rated power cannot be fully utilized. In addition, during cold start, the fuel cell stack temperature is too low or the fuel temperature of the intake system is too low, which reduces the battery efficiency and life. Contents of the invention [0003] In view of this, the embodiments of the present invention provide an ener...

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Problems solved by technology

In the current management of battery temperature, when the ambient temperature is -40°C to 40°C, the temperature inside the fuel cell stack is often unable to maintain the optimum operating temperature range, resulting in low battery power conversion efficiency and the risk of thermal runaway The rated power cannot be fully utilized. In addition, during cold start, the fuel cell stack temperature is too low or the fuel temperature of the intake system is too low, which reduces the battery efficiency and life.

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