公开(公告)号：US20230322115A1

公开(公告)日：2023-10-12

申请号：US17734065

申请日：2022-05-01

Applicant: PHIHONG TECHNOLOGY CO., LTD.

Inventor： Sheng-Wen Sung ,  Jian-Hsieng Lee ,  Chun-Chen Chen

IPC: B60L53/66 ,  B60L53/30 ,  H02J7/00

CPC classification number: B60L53/66 ,  B60L53/305 ,  H02J7/00716

Abstract: A detection circuit for control pilot abnormality of a DC charging pile, which is electrically connected to a control pilot signal generating circuit and a control circuit, providing instant protection for the DC charging pile while control pilot (CP) abnormality been detected. The detection circuit includes a control pilot (CP) signal potential discrimination module, a charging-discharging module electrically connected to the CP signal potential discrimination module, and a controller protection triggering module electrically connected to the charging-discharging module, wherein the CP signal potential discrimination module justifies the voltage level of the input CP signals been input, activates the charging-discharging module to charge the CP signals to a steady-state voltage higher than a predetermined voltage level within a certain time period, and activates the controller protection trigger module to provide instant protection for the DC charging pile.