Fuel cell thermal management system and thermal management method in fuel cell bus

Abstract

The present invention provides a fuel cell thermal management system in a fuel cell bus. The water outlet of the fuel cell, the condenser, the water pump, and the water inlet of the fuel cell are sequentially connected to form a circulation channel, and the cooling fan is arranged near the condenser. The controller is respectively connected to the fuel cell, cooling fan, condenser, and water pump signals; the vehicle controller is used to collect fuel cell inlet temperature, fuel cell outlet temperature, fuel cell voltage, fuel cell current and outdoor temperature, and obtain The required speed adjustment signal of the cooling fan is sent to the cooling fan at the same time to control the corresponding operation and stop of the cooling fan, which is used to control the operation and stop of the condenser and the water pump. Also provided is a fuel cell heat management method in a fuel cell bus. The system structure of the invention is simple, the heat management method using it is simple and feasible, and the inlet temperature of the fuel cell is stable.

Description

technical field [0001] The invention relates to a fuel cell heat management system and a heat management method in a fuel cell bus. Background technique [0002] During the operation of the fuel cell bus, the fuel cell will generate heat due to use, which will increase the temperature of the fuel cell and affect the use of the fuel cell. In order to ensure the normal use of the fuel cell, it is necessary to control the temperature of the fuel cell within the required temperature range of the fuel cell (the range of the required temperature of the fuel cell can be adjusted and set as required), so it is necessary to heat the fuel cell of the fuel cell bus At present, the thermal management of fuel cells generally adopts cooling fans and water circulation to dissipate heat from the fuel cells, that is, the fuel cell controller collects the inlet temperature of the fuel cell, and the deviation rate between the inlet temperature of the fuel cell and the required temperature of t...

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Problems solved by technology

However, in this method, although the temperature of the cooling fan has dropped, due to the long distance between the inlet of the fuel cell and the radiator, the temperature signal at the inlet of the fuel cell is used to adjust the cooling fan, so that the signal of the water temperature is delayed, which eventually leads to the failure of the fuel cell. The deviation between the inlet temperature and the required temperature of the fuel cell reaches ±10°C

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