Fuel cell thermal management control method

Abstract

The invention discloses a high-efficiency fuel cell thermal management control method. The method comprises the following steps: 1, in a starting stage, starting a small-cycle heating loop, and controlling a small-cycle heating electric pile along with an optimal temperature rise curve given by the electric pile to make the temperature of the electric pile rise along with the given optimal temperature rise curve and shorten the starting time of the electric pile; 2, in the temperature rising stage, collecting the water inlet temperature and the water outlet temperature of the electric pile, obtaining a circulating water pump rotating speed request and a three-way valve opening degree request through table look-up and calculation, and intelligently adjusting heating and heat dissipation of a heat management system; and 3, when the temperature of the electric pile exceeds the set temperature, limiting the generation power of the electric pile according to the collected actual circulating water pile entering temperature, so that the generation power of the electric pile does not exceed the power corresponding to the current maximum heat dissipation capacity, and controlling the opening degree of a three-way valve, the cooling water heat dissipation rate request and the rotating speed of a target water pump in a matched mode to maintain the operating temperature of the electric pile in a preset range and reduce the risk of thermal runaway of the electric pile.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell thermal management control method. Background technique [0002] In the current era of rapid consumption of fossil energy, finding alternative renewable clean energy has become a major issue for sustainable development, and hydrogen energy, as a renewable clean energy, has received more and more attention. As an electrochemical device, the fuel cell can directly convert the chemical energy in hydrogen into electrical energy, without the combustion process of a traditional internal combustion engine, the energy conversion process is simpler, and is not limited by the Carnot cycle, with high efficiency and no pollution. Excellent NVH performance and other advantages are considered to be the future of the automotive industry. However, during the normal operation of the fuel cell, the heat released by the stack reaction accounts for about 30% to 60% of the total energy, and the...

AI Technical Summary

Problems solved by technology

Excessive start-up times, especially cold starts, lead to increased hydrogen consumption

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