High-voltage side cooperative control method of fuel cell system in starting process

• Main Authors: XIE QIANYA, PAN DI, SUN CHENGWEI, ZHOU FUJIN, LI NA, LI DONG, MAO BIN
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a high-voltage side cooperative control method of a fuel cell system in a starting process. The method comprises the following steps: constructing a high-voltage topological structure comprising a fuel cell stack, a DCDC converter, a power cell, a heater, a first relay unit, a second relay unit, a third relay unit and a fourth relay unit; state self-inspection is carried out on all the high-voltage components, and it is determined that the fuel cell system is in an allowed starting state; after a starting enabling demand fed back by the vehicle control unit is received, the fuel cell system is controlled to enter a starting mode; controlling the heater to adjust the voltage of the fuel cell stack, and then adjusting the operation state of the DCDC converter; and checking the starting state of the fuel cell system by combining the current output voltage of the fuel cell stack and the current working states of the third relay unit and the fourth relay unit. According to the invention, th