A power management circuit for an electric vehicle

Abstract

The invention discloses a power management circuit for an electric vehicle. The power management circuit comprises a discharge control circuit, a discharge switch, and a master controller used for managing discharge power of a battery of the electric vehicle, wherein the discharge control circuit comprises a switching power supply chip, a resistor R1, a resistor R2, a resistor R3, a triode Q1 and a voltage-regulator tube ZD1; when the charging input end of the battery is connected with a charging power supply for charging, a battery state notification end of the switching power supply chip outputs a high-level signal, and the master controller controls the battery to not discharge or stop discharging. According to the power management circuit in the embodiment of the invention, the discharge control circuit is used for monitoring whether the electric vehicle is currently positioned in a charging state in real time, and when the electric vehicle is positioned in the charging state, the master controller is notified and then limits output of the battery of the electric vehicle, and then the charging safety of the electric vehicle is protected, and charging accidents are avoided as many as possible.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a power management circuit of the electric vehicle. Background technique [0002] As the main means of transportation for travel, traditional fuel vehicles bring convenience to people, but also cause a lot of pollution. As more and more non-polluting energy sources are favored by people, the replacement of fuel vehicles by new energy vehicles has become a general trend. Especially in recent years, with the development of technology and breakthroughs in battery life, electric vehicles have gradually been accepted by the market. [0003] At present, electric vehicles are generally not equipped with charging protection devices or protection measures. When the electric vehicle is charging, if it is started to ignite or continue to supply power to the motor, it will not only have a great impact on the battery life, but also easily cause accidents. It appears that the electr...

AI Technical Summary

Problems solved by technology

[0003] At present, electric vehicles are generally not equipped with charging protection devices or protection measures. When the electric vehicle is charging, if it is started to ignite or continue to supply power to the motor, it will not only have a great impact on the battery life, but also easily cause accidents. It appears that the electric car is still charging, and the result is that the electric car is directly ignited and starts to run. This is undoubtedly very dangerous

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