Fuel cell control method and system based on model predictive control

Patent metadata

Field	Value
Publication number	US-11569517-B2
Application number	US-202117396337-A
Country	US
Kind code	B2
Filing date	Aug 6, 2021
Priority date	Aug 7, 2020
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A fuel cell control method and system based on model prediction control are provided. The method includes: (1) obtaining data required for control; (2) determining whether the data required for control are received completely; (3) estimating an internal state of a fuel cell based on outlet pressure of an air compressor and a voltage of the fuel cell to obtain a state estimation result; (4) calculating a target outlet flow of the air compressor and a target current of the fuel cell with a model prediction control algorithm based on the state estimation result; (5) calculating a control voltage of the air compressor, and a target outlet flow of the air compressor; and (6) tracking power of the fuel cell based on the target current of the fuel cell, and controlling air supply of the fuel cell based on the control voltage of the air compressor.

First claim

What is claimed is:

1. A fuel cell control method based on model prediction control, comprising the following steps:
S 1 : obtaining data required for control, by a fuel cell control unit, from a vehicle control unit and a data collection module, wherein the data required for control comprise required power for a fuel cell system, a rotational speed of an air compressor, outlet pressure of the air compressor, temperature of a fuel cell, gas pressure of a cathode inlet of the fuel cell, gas pressure of a cathode outlet of the fuel cell, a voltage of the fuel cell, and a current of the fuel cell;
S 2 : determining whether all the data required for control are obtained by the fuel cell control unit, and under a condition that all the data required for control are obtained, proceeding to step S 3 , otherwise proceeding to step S 1 ;
S 3 : by the fuel cell control unit, estimating an internal state of the fuel cell based on the outlet pressure of the air compressor and the voltage of the fuel cell by adopting an unscented Kalman filter algorithm, to obtain a state estimation result, wherein the internal state comprises pressure and partial pressure of oxygen of the cathode of the fuel cell;
wherein in the unscented Kalman filter algorithm, the current of the fuel cell and an outlet flow of the air compressor are taken as an input of a system, the voltage of the fuel cell and intake manifold pressure are taken as an output of the system;
wherein linear continuous state equations of the system are

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Assignees

• Univ Tongji

Inventors

• Song Ke
• Wang Xiaodi

Classifications

• H01M8/04395

  of cathode reactants at the inlet or inside the fuel cell · CPC title

• H01M8/04552

  of the individual fuel cell · CPC title

• H01M8/04992 Primary

  characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence · CPC title

• H01M8/04753

  of fuel cell reactants · CPC title

• H01M2250/20

  Fuel cells in motive systems, e.g. vehicle, ship, plane · CPC title