Arc-discharge prevention charging method and system for energy accumulation type electric traction vehicle

Abstract

The invention discloses an arc-discharge prevention charging method for an energy accumulation type electric traction vehicle. The arc-discharge prevention charging method comprises the following steps of (1) detecting voltage on a power rail; (2) judging whether the voltage on the power rail is more than 0, and if the voltage on the power rail is not more than 0, executing the step (3), otherwise executing the step (4); (3) forbidding power supply to the power rail; (4) supplying power to the power rail, detecting current on the power rail, and if the current on the power rail is less than or equal to preset current, stopping the power supply to the power rail. When the power is supplied to the power rail, a power receiving system is in good contact with the power rail; furthermore, when the power receiving system is separated from the power rail, the power supply to the power rail is stopped; therefore in the processes of contact and separation between the power receiving system and the power rail, electric arc is not produced, so that the phenomenon that the power receiving system and the power rail are burned by the electric arc is effectively avoided; the service lives of the power receiving system and the power rail are effectively prolonged. The invention also discloses a charging system capable of executing the charging method.

Description

technical field [0001] The invention relates to the technical field of energy storage electric traction vehicles, and more specifically, to a charging method and device for preventing arcing of energy storage electric traction vehicles. Background technique [0002] Energy storage power supplies generally include lead-acid batteries, alkaline batteries, lithium batteries, and supercapacitor energy storage power supplies. Since the first three energy storage power supplies require chemical reactions during charging, the temperature rise of the electrolyte in the power supply is related to charging. The current is proportional to the current. In order to avoid damage to the power supply caused by overcharging, the charging current needs to be controlled during the charging process. The supercapacitor does not need to undergo chemical reactions during the charging process, and the internal resistance of the supercapacitor itself is very small, so it can be charged with a large ...

AI Technical Summary

Problems solved by technology

[0004] However, since the charging rail in the current charging station is always charged, and the charging current of the energy storage electric traction vehicle is very large, the moment the vehicle enters the station, the receiver contacts the power supply rail, and the vehicle exits the station. At the moment, there will be a serious arcing phenomenon between the receiver and the power supply rail, which will cause the receiver and the power supply rail to burn out, and serious accidents will occur

Images