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CN-122000392-A - Method for online calculating hydrogen utilization rate of fuel cell system based on upper computer

CN122000392ACN 122000392 ACN122000392 ACN 122000392ACN-122000392-A

Abstract

The invention discloses a method for online calculating hydrogen utilization rate of a fuel cell system based on an upper computer. The method comprises the steps of (1) collecting real-time flow H2 act of a hydrogen flowmeter by an upper computer according to a preset collection period T cycle1 , (2) entering a step (3) if a button switch for calculating the hydrogen utilization rate of the upper computer is turned on, returning to the step (1) if the button switch is turned off, (3) entering the step (4) if the program operation period of a hydrogen utilization rate calculation module is more than or equal to a preset period T cycle2 , returning to the step (1) if the program operation period of the hydrogen utilization rate calculation module is less than the preset period T cycle2 , and (4) calculating theoretical hydrogen consumption and actual hydrogen consumption, wherein the hydrogen utilization rate eta H2 =H2 con_toy /H2 con_act is 100, and returning to the step (1). The invention solves the problem of the calculation method for calculating the hydrogen utilization rate on line and in real time when the upper computer of the fuel cell system test board is in calibration test.

Inventors

  • DENG QINGYAN
  • HUANG WUWEN
  • LI JIAJUN
  • YANG QIANG

Assignees

  • 广东云韬氢能科技有限公司

Dates

Publication Date
20260508
Application Date
20260227
Priority Date
20260209

Claims (7)

  1. 1. The method for online calculating the hydrogen utilization rate of the fuel cell system based on the upper computer is characterized by comprising the following steps: (1) The upper computer collects the real-time flow H2 act of the hydrogen flowmeter according to a preset collection period T cycle1 ; (2) If the upper computer hydrogen utilization rate calculation button switch is turned on, the step (3) is entered, if the upper computer hydrogen utilization rate calculation button switch is turned off, the theoretical hydrogen consumption amount H con_toy =0, the actual hydrogen consumption amount H con_act =0 and the hydrogen utilization rate eta H2 =0 are returned to the step (1); (3) If the program running period of the hydrogen utilization rate calculation module is more than or equal to the preset period T cycle2 , entering the step (4), and if the program running period of the hydrogen utilization rate calculation module is less than the preset period T cycle2 , returning to the step (1); (4) Calculating theoretical hydrogen consumption H2 con_toy and actual hydrogen consumption H2 con_act , and calculating to obtain hydrogen utilization rate eta H2 through the following formula; returning to the step (1) with the hydrogen utilization rate eta H2 =H2 con_toy /H2 con_act being 100; (5) And obtaining the hydrogen utilization rate of the system through continuous polling calculation.
  2. 2. The method for online calculation of hydrogen utilization rate of fuel cell system based on upper computer according to claim 1, wherein the preset collection period T cycle1 is 0.05-0.2 s.
  3. 3. The method for online calculation of hydrogen utilization rate of fuel cell system based on upper computer according to claim 1, wherein the preset collection period T cycle2 is 0.05-0.2 s.
  4. 4. The method for online calculation of hydrogen utilization rate of fuel cell system based on upper computer according to claim 1, wherein the number of single-cell stacks N cell is different from the number of different cells.
  5. 5. The method for online calculation of hydrogen utilization rate of fuel cell system based on upper computer as claimed in claim 1, wherein in the step (4), the theoretical hydrogen consumption amount H2 con_toy is calculated by adopting the following formula: theoretical hydrogen consumption H2 con_toy = stack output current I stack x 2.016 x stack number of monoliths N cell /192970*T cycle2 +H2 con_toy .
  6. 6. The method for online calculation of hydrogen utilization rate of fuel cell system based on upper computer as claimed in claim 1, wherein in step (4), the actual hydrogen consumption H2 con_act is calculated by the following formula: actual hydrogen consumption H2 con_act =H2 act *T cycle2 +H2 con_act .
  7. 7. The method for online calculation of hydrogen utilization rate of fuel cell system based on upper computer according to claim 1, wherein in step (5), the time of continuous polling calculation is not less than 3 min.

Description

Method for online calculating hydrogen utilization rate of fuel cell system based on upper computer Technical Field The invention belongs to the field of fuel cells, and particularly relates to a method for online calculating hydrogen utilization rate of a fuel cell system based on an upper computer. Background The fuel cell car uses hydrogen as fuel, and generates electric energy through the chemical reaction of hydrogen and oxygen to drive the car, and the emission is only water vapor, so that the fuel cell car has no pollution to the environment. Fuel cell vehicles offer significant advantages over conventional fuel vehicles in terms of reduced greenhouse gas emissions. At present, a plurality of companies and research institutions actively invest in the development and popularization of fuel cells on a global scale. In China, the government has been out of the way to support the development of the fuel cell industry with a series of policies, and initial results are obtained, so that a great deal of development of fuel cells can be expected in the future along with the support of policies and the continuous progress of technologies. The hydrogen utilization rate is an important parameter index of the fuel cell system, the higher the hydrogen utilization rate is, the more unnecessary hydrogen waste is reduced, the higher the system efficiency is, the hydrogen utilization rate is related to the material tightness of a galvanic pile and the tightness of a system pipeline, the opening and closing period of an anode hydrogen drain valve also influences the hydrogen utilization rate of the system, after a fuel cell prototype comes out, a fuel cell system test engineer can calibrate the opening and closing time of the anode drain valve according to the characteristic condition of the system to optimize and improve the hydrogen utilization rate of the system, but if the specific opening and closing time of the anode drain valve is not used as a real-time reference, the opening and closing period of the actually calibrated anode drain valve is unreasonable, the drainage and the nitrogen drainage of the system are too frequent, the hydrogen utilization rate is too low, and the waste of the system hydrogen is caused. The calculation of the hydrogen utilization rate of the current fuel cell system mainly utilizes related data stored after the system operates, the hydrogen utilization rate under different electric densities is manually calculated in a later-stage original data file, then the switching cycle of a hydrogen tail discharge valve is continuously calibrated according to the calculated hydrogen utilization rates under different electric densities, and the hydrogen utilization rate under different electric densities is continuously calculated off line until the hydrogen utilization rate reaches the optimal value when the system is designed, and the hydrogen utilization rate of the system cannot be monitored on line in real time when the fuel cell system operates. When the hydrogen utilization rate of the fuel cell system is calibrated, the hydrogen utilization rate corresponding to the current calibration parameter is not obtained in real time, and whether the current parameter is an optimal value cannot be determined. When an engineer works for calibrating the hydrogen utilization rate, the whole calibration work content is repeated and tedious, and the efficiency is low. Disclosure of Invention The invention overcomes the defects of the prior art and provides a method for online calculating the hydrogen utilization rate of a fuel cell system based on an upper computer. The method solves the problem that the upper computer of the fuel cell system test bench calculates the hydrogen utilization rate in real time on line during the calibration test, and the fuel cell system can correspondingly adjust the relevant control quantity to achieve the expected hydrogen utilization rate of the system according to the real-time hydrogen utilization rate during the calibration test of the hydrogen utilization rate, thereby improving the efficiency of the hydrogen utilization rate optimization by the engineer calibration and shortening the calibration time. The technical scheme of the invention is as follows. A method for online calculating hydrogen utilization rate of a fuel cell system based on an upper computer comprises the following steps: 1. the upper computer collects the real-time flow H2 act of the hydrogen flowmeter according to a preset collection period T cycle1; 2. If the upper computer hydrogen utilization rate calculation button switch is turned on, the step 3 is entered, if the upper computer hydrogen utilization rate calculation button switch is turned off, the theoretical hydrogen consumption amount H2 con_toy =0, the actual hydrogen consumption amount H2 con_act =0 and the hydrogen utilization rate eta H2 =0 are returned to the step 1; 3. If the program running period of the hydrogen utilization rate