An electric vehicle power unit

Abstract

The invention relates to an electric automobile power device which is applicable to driving of electric automobiles. According to the technical scheme, one end of the output shaft of a main driving motor is fixedly connected with the output shaft of an electromagnetic slip clutch through a coupling (3) and a differential mechanism (4) in sequence; a main driving motor controller (21) is used for controlling operation of a main driving motor; an acceleration petal (11) is used for providing an operation signal to the main driving motor controller; the electromagnetic slip clutch (5) is provided with an input shaft and an output shaft; the electric automobile power device further comprises a current sensor (15), a current sensor controller (31), an electromagnetic slip clutch controller (32), an auxiliary driving motor (6), a lifting gearbox (7), an auxiliary driving motor controller (22), a flywheel (8), a speed detection sensor (801) and a speed detection sensor controller (33). By adoption of the technical scheme, a power device transmission effect is achieved, the multiple of multiplying power discharge of a battery pack can be reduced, and the service life of the battery pack is shortened.

Description

technical field [0001] The invention relates to an electric vehicle power device. The device adopts the combined use of double motors, flywheels and electromagnetic slip clutch structure, which can effectively improve the power transmission effect of electric vehicles and is suitable for driving electric vehicles. Background technique [0002] With the rapid development of the automobile industry, various new energy vehicles are emerging, such as pure electric vehicles. The rate discharge of the battery pack used in pure electric vehicles is a difficult problem, which seriously affects the power output effect of electric vehicles and the life of the battery pack. [0003] In order to improve the life of the battery pack under actual working conditions, some people have proposed the effect of connecting a group of super capacitors in parallel between the series battery packs. For example, Chinese Patent Publication No. CN1833908A discloses a hybrid vehicle, which uses a bat...

AI Technical Summary

Problems solved by technology

[0006] Existing electric vehicles need to use a vacuum negative pressure pump for braking. The vacuum negative pressure pump has high cost, high noise, high energy consumption, short life, low work efficiency, and slightly longer service time. The vacuum degree of the vacuum pump decreases and cannot reach The vacuum degree of the vacuum booster pump will cause poor braking effect, and even brake failure in severe cases.

[0007] According to the feedback information on the operation of thousands of electric vehicles in ten cities in the country, the use efficiency and charge-discharge cycle life of the battery pack are very low, and the efficiency of the drive motor has dropped seriously, resulting in a basic usability for one year of use, and a significant drop in efficiency in two years. It is greatly shortened and cannot be used normally. It cannot be used for three years, and even the battery pack fails completely.

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