Thermal behavior analysis of wireless electric vehicle charging system under various misalignment conditions

Niu，Songyan; Yu，Hang; Jian，Linni

10.1109/EI250167.2020.9347192

2020-10-30

978-1-7281-9607-7

2020 IEEE 4th Conference on Energy Internet and Energy System Integration: Connecting the Grids Towards a Low-Carbon High-Efficiency Energy System, EI2 2020

607-612

30 Oct.-1 Nov. 2020

Wuhan, China

Concerning thermal safety, the surface of ground assembly (GA) is deemed as the most critical part of wireless charging device for electric vehicles (EVs). As a result of accumulated losses in the charging process, its temperature gradually climbs, which may lead to dermal injury to children and ignition of combustible debris. In practice, it is very usual that the GA and vehicle assembly (VA) are not perfectly aligned, wherein its temperature rise will be even higher as a penalty of efficiency deterioration. However, it rarely attracts attention as a safety hazard. This article is devoted to risk evaluation of the GA surface. The temperature-rise-related losses are derived. The thermal distribution is simulated in a transient-state way by JMAG. On the basis of IEC specification, a four-temperature level framework is established as evaluation criteria. The results signify severe impact of GA-VA misalignment on the thermal performance. Moreover, sensitivity analysis of three kinds of misalignments to the temperature rise is conducted. When the horizontal misalignment is larger than 81.12 mm or the angular counterpart exceeds 6.83 degree, the highest hazard level will be reached, revealing over-temperature risk.

Electric vehicle (EV) Finite element method (FEM) Inductive power transmission Thermal analysis Wireless power transfer

第一

英语

EI

20210910002105

Alignment ; Deterioration ; Electric automobiles ; Hazards ; Sensitivity analysis

Mechanical Devices:601.1 ; Automobiles:662.1 ; Accidents and Accident Prevention:914.1 ; Mathematics:921 ; Materials Science:951

2-s2.0-85101621780

Scopus

Southern University of Science and Technology,Electrical and Electronic Engineering,Shenzhen,China

Niu，Songyan,Yu，Hang,Jian，Linni. Thermal behavior analysis of wireless electric vehicle charging system under various misalignment conditions[C],2020:607-612.