Investigation on Energy Flow Characteristics of Fuel Cell System Based on Real Vehicle Tests

Zhijie Duan,Zengyou Jiang,Jichao Hong,Dongfang Chen,Chen Li,Lili Feng,Shuguang Yu,Xiaoming Xu

doi:10.3390/en14238172

Abstract

For fuel cell hybrid vehicles, the energy distribution mechanism of the fuel cell and power battery should reasonably allocate the power output of the fuel cell and power battery, optimize the efficiency of both and control the power battery SOC to fluctuate within a reasonable range. To test the energy flow and operation characteristics of the powertrain of two hybrid car models on the market, two test vehicles (called vehicle A and vehicle B in this paper) are tested on an AIP 4WD chassis dynamometer under constant power and the China Light-Duty Vehicle Test Cycle-Passenger cycle condition, respectively. The test results show that vehicle A has a smaller power battery SOC variation interval and a lower variable rate than vehicle B. The cumulative power battery output energy of vehicle B is more significant than that of vehicle A. More importantly, the current rare public test reports of fuel cell vehicles make this study very valuable. This paper has important reference significance for the energy flow characteristics and energy management strategy of existing fuel cell hybrid vehicles.

Highlights

With global energy and environmental problems increasingly prominent, the development of new energy vehicles has become the consensus of all countries in the world [1,2].As significant consumers of oil and carbon dioxide emissions, cars need to undergo revolutionary reforms
The results show that the battery pack helps the FC to supply the steady-state load demand
The fuel cell stack arranged under the vehicle is the core of the whole system

Summary

Introduction

With global energy and environmental problems increasingly prominent, the development of new energy vehicles has become the consensus of all countries in the world [1,2].As significant consumers of oil and carbon dioxide emissions, cars need to undergo revolutionary reforms. With global energy and environmental problems increasingly prominent, the development of new energy vehicles has become the consensus of all countries in the world [1,2]. Various governments have introduced different policies to support the development of new energy vehicles, and the market for new energy vehicles is expanding. As a representative of new energy vehicles, fuel cell hybrid vehicles have made significant development. Thereisisno noconventional conventional fuel cell engine and no transmission, and inside the cabin is the control unit for fuel cell engine and no transmission, and inside the cabin is the control unit forthe theelectric electric motor. The fuel cell stack arranged under the vehicle is the core of the whole system. The fuel cell stack arranged under the vehicle is the core of the whole system. vehicle

Methods

Results

Conclusion