Fuel cell electric automobile power optimization method

Abstract

The invention relates to the technical field of automobiles, in particular to a fuel cell electric automobile power optimization method. The method includes the following steps that step 1: automobile use power is calculated; step 2: the power is calculated according to the state of a SOC; step 3: power correction is conducted; and step 4: power output is conducted. According to the fuel cell electric automobile power optimization method, automobile energy use efficiency can be improved, automobile economy is improved, and the principle of energy distribution is optimized, so that endurance mileage is improved, and the automobile energy use efficiency can be improved, the automobile economy is improved, and the principle of the energy distribution is optimized, so that the endurance mileage is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a power optimization method for a fuel cell electric vehicle. Background technique [0002] Due to the fact that the output characteristics of the fuel cell are soft and cannot respond to the power demand of the vehicle in real time, the power distribution strategy of fuel cell vehicles generally adopts a switch control strategy, that is, when the SOC value of the power battery is less than a certain value, the fuel cell engine (FCE) is turned on. , and keep the FCE running at the rated power point, and pursue the stable power output of the FCE. When the SOC is greater than a certain value, the FCE is turned off, and the power battery provides energy alone. In this solution, the vehicle system does not operate at the optimum point of efficiency and cannot guarantee the hydrogen tank. Hydrogen-priority power battery energy is used up first, which leads to the problem of unreas...

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Problems solved by technology

[0002] Due to the fact that the output characteristics of the fuel cell are soft and cannot respond to the power demand of the vehicle in real time, the power distribution strategy of fuel cell vehicles generally adopts a switch control strategy, that is, when the SOC value of the power battery is less than a certain value, the fuel cell engine (FCE) is turned on. , and keep the FCE running at the rated power point, and pursue the stable power output of the FCE. When the SOC is greater than a certain value, the FCE is turned off, and the power battery provides energy alone. In this solution, the vehicle system does not operate at the optimum point of efficiency and cannot guarantee the hydrogen tank. Hydrogen-priority power battery energy is used up first, which leads to the problem of unreasonable energy utilization of the whole vehicle and short cruising range. Aiming at this problem, a power optimization strategy for fuel cell electric vehicles is proposed, which can improve the energy efficiency of the whole vehicle and improve the economy of the whole vehicle performance, optimize the principle of energy distribution, thereby increasing the mileage of the vehicle

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