A power control device for an electric vehicle

Abstract

The invention discloses a power control device and method of an electric automobile. The power control device of the electric automobile comprises an automobile battery assembly and an automobile motor installed on the side of the automobile battery assembly; an active temperature control device is installed on the automobile battery assembly; the automobile motor is connected with an anti-slam pedal mechanism for battery protection through an automobile motor system; the automobile battery assembly comprises a battery assembly box; a plurality of battery cells connected in series with each other through circuit breakers are installed inside the battery assembly box; the active temperature control device comprises a cooling outer box, a plurality of temperature measuring components installed inside the battery assembly box and the automobile motor; a number of cooling tube groups are installed inside the automobile motor; the cooling tube groups are connected with the cooling outer boxthrough a circulation chamber; and the anti-slam pedal mechanism comprises a pedal body installed inside the electric automobile. The power control device of the electric automobile effectively reduces the temperature and solves the problem of excessive local temperature through performing targeted cooling on the electric automobile motor; therefore, the motor operating efficiency is improved, large current discharge is avoided, and the battery service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a power control device and method for electric vehicles. Background technique [0002] An electric vehicle refers to a vehicle powered by a vehicle-mounted power supply, driven by a motor to drive the wheels, and conforming to the requirements of road traffic and safety regulations. Due to its smaller impact on the environment than traditional vehicles, its prospects are widely optimistic, but the current technology is still immature. Electric vehicles are mainly divided into pure electric vehicles, hybrid vehicles, and fuel cell vehicles. [0003] A pure electric vehicle is a vehicle driven by an electric motor. Compared with a fuel vehicle, the main difference between a pure electric vehicle is the four major components, the drive motor, the speed controller, the power battery, and the on-board charger. Compared with the gas station, it consists of public For ultra-f...

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Problems solved by technology

[0011] (1) General electric vehicles mostly use batteries for power supply. When the motor of the motor is working, the heat generation of different parts of the internal structure of the motor is inconsistent. The traditional heat dissipation method of the motor is to dissipate heat directly through the fan at the end, which not only cannot Reduce the local temperature of the motor in a targeted manner, and the single air blowing method cannot meet the heat dissipation requirements of the motor for long-term work;

[0012] (2) At the same time, when electric vehicles are used, since the battery is connected in series, it is easy to be overcharged due to a decrease in the capacity of a certain battery when charging together, which affects the service life of the battery. When driving under special conditions, stepping on the accelerator pedal too violently will cause a large current discharge to the battery, which will affect the service life of the battery

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