Design of AC Charging Interface and Status Acquisition Circuit for Electric Vehicles
Abstract: To address the
unreliable charging of new charging interfaces caused by comprehending deviation
on China’s alternating current (AC) charging interface standard for electric
vehicles,implementation methods of AC charging interface circuit, control pilot
(CP) circuit, and status acquisitioncircuit for electric vehicles were proposed
in this study. Basic principle and functions of the CP circuit were discussed,
and influences of resistance parameters on voltage state at test point were
analyzed. Freescale MC9S12XEQ512 was used as the main controller, and its
integrated pulse-width modulation module and analog-to-digital converter module
were used to simplify circuit designs. An experimental test on charging interface
connection confirmation, CP, output power parameter passing, and real-time
charging connection status acquisition was conducted on real vehicles. Results
demonstrated that the designed circuits exhibit high security and meet the
basic requirements of GB/T20234-2 with regard to AC charging interface characteristics.
All test data are within the allowed error range. Furthermore, real-time
monitoring of the charging process and security isolation design of signals can
effectively improve the system stability. Hence, this technology can be used in
AC charge control of electric vehicles.
Author: Kun Xu, Li Li
Journal Code: jptkomputergg160292
Artikel Terkait :
Jp Teknik Komputer gg 2016
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