Braking system of electric vehicle and electric vehicle

Abstract

The invention provides a brake system of an electric vehicle and the electric vehicle, which can reduce the heating value of a hub motor driving wheel. A brake system (10) for an electric vehicle (100) is provided with a front wheel regenerative braking part (11) that performs front wheel regenerative braking; a rear wheel regenerative braking part (12) that performs rear wheel regenerative braking; a front wheel mechanical brake part (13) that performs front wheel mechanical braking; a rear wheel mechanical brake part (14) that performs rear wheel mechanical braking; a braking degree detection part (15) that detects braking degree information when the driver performs braking; a travel state detection part (16) that detects the gradient of the travel road surface of the electric vehicle; and a brake control part (17) that performs brake control by controlling the front wheel regenerative braking unit, the rear wheel regenerative braking unit, the front wheel mechanical braking unit, and the rear wheel mechanical braking unit on the basis of the received brake degree information and slope information of the traveling road surface.

Description

technical field [0001] The invention relates to a brake system of an electric vehicle and the electric vehicle. Background technique [0002] Against the backdrop of increasingly serious environmental pollution and increasingly stringent emission regulations, electric vehicles, as a new energy vehicle technology, only use electric energy as the energy source, which can make the vehicle's own power system emissions nearly zero. The development of electric vehicle technology has also promoted the development of four-wheel independent control technology, among which hub motor technology can realize independent control of driving wheels, which is a promising driving technology. [0003] The hub motor is an electric vehicle drive technology that integrates components such as motors or inverters related to the motor into the rim. Its advantage is that the vehicle power system originally located above the suspension spring is transferred to the rim below the suspension spring, whi...

AI Technical Summary

Problems solved by technology

[0004] Although in-wheel motors have many advantages, there are also some disadvantages that restrict their wide application in the field of passenger vehicles

For example, the increase of the unsprung mass leads to the deterioration of the ride comfort of the vehicle at low speed, and the heat management problem when the hub motor system is integrated in the relatively closed rim, etc.

The ride comfort of the vehicle at low speed can be improved by adjusting the suspension, but it is difficult to solve the heat management problem of the in-wheel motor, especially in urban low-speed driving conditions, frequent braking causes both the motor and the braking system to become heat sources

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