Electromobile high-voltage system and relay state detector thereof

• Main Authors: GAO ZHENYU, WANG JUN, SU WEIKUN, NING DADIAO, TU CHENGJIAO, LAI JIJIAN, JIANG WEI
• Format: Patent
• Language: English
• Published: 24.06.2015
• Subjects: ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PERFORMING OPERATIONS; PHYSICS; TESTING; TRANSPORTING; VEHICLES IN GENERAL

Provided is an electromobile high-voltage system and a relay state detector thereof. The detector comprises an isolated communication circuit, a first voltage sampling device, a second voltage sampling device, a third voltage sampling device, a first filter circuit, a second filter circuit, a third filter circuit, an analog and digital sampling circuit and a microcontroller, wherein the first, second and third voltage sampling devices, the first, second and third filter circuits and the analog to digital sampling circuit are arranged in a high-voltage area; the microcontroller is arranged in a low-voltage area; the first voltage sampling device is connected in parallel with a power supply of the electromobile high-voltage system; one end of the second voltage sampling device is connected with the outer end of a main positive relay of the electromobile high-voltage system, and the other end of the second voltage sampling device is connected with the cathode of the power supply; the third voltage sampling device is connected in parallel with the main negative relay of the electromobile high-voltage system; the filter circuits are connected with the voltage sampling devices correspondingly; the filter circuits are also connected with the analog and digital sampling circuit; and the analog and digital sampling circuit is connected with the microcontroller via the isolated communication circuit. According to the technical scheme of the utility model, only one isolated communication circuit is needed, and the cost is greatly reduced.