Electric vehicle charging system and method

Abstract

The invention discloses an electric vehicle charging system which comprises a BMS system, a DCDC converter, a power converter and a power-off protection system, wherein the BMS system is used for detecting parameters of an electric vehicle storage battery, the DCDC converter is used for adjusting the voltage of the charging system, the power converter is used for conversion between direct current and alternating current, and the power-off protection system is composed of a temperature detection system and a power-off switch. The electric vehicle charging system has the beneficial effects that the time for a user to stop charging the electric vehicle is controlled, the problem of overcharging of a battery in the charging process is avoided, the service life of the rechargeable battery is prolonged, resource waste is avoided, and the charging efficiency of the charging pile is improved; different charging modes and chargers can be selected according to different vehicle-mounted battery models, meanwhile, the real-time state of the vehicle-mounted battery in the charging process can be monitored in real time, and charging safety is ensured.

Description

technical field [0001] The invention relates to the technical field of charging electric vehicles, in particular to a charging system and method for electric vehicles. Background technique [0002] With the continuous development of the electric vehicle industry, the construction of charging equipment for electric vehicles continues to increase, and it has become an urgent need for car owners and users to provide a convenient and reliable charging method in the charging link of electric vehicles. The charging pile in the prior art usually charges the user's electric vehicle according to a fixed time. The disadvantage of using this fixed-time charging method is that it can only roughly estimate the power required by the user. If the user's electric vehicle has a certain amount of battery power left Under normal circumstances, charging with a fixed time will cause the battery to continue charging when the battery is fully charged, resulting in overcharging of the battery, whic...

AI Technical Summary

Problems solved by technology

The charging pile in the prior art usually charges the user's electric vehicle according to a fixed time. The disadvantage of using this fixed-time charging method is that it can only roughly estimate the power required by the user. If the user's electric vehicle has a certain amount of battery power left Under the circumstances, charging with a fixed time will cause the battery to continue charging when the battery is fully charged, resulting in overcharging of the battery, which is not good for the life of the rechargeable battery of the electric vehicle, and is also not conducive to the efficient use of the charging pile.

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