Electric car and power management device of electric car

Abstract

A power supply management device for electric vehicle and an electric vehicle with the power supply management device. The power supply management device comprises a first management module (101), a second management module (102) and a battery module (103), wherein, the first management module (101) is connected with the second management module (102) for controlling the delay power-on of the second management module (102) when the vehicle key is turned on, to implement the power-on self-test for the vehicle controller of the electric vehicle, and controlling the delay power-off of the second management module (102) when the vehicle key is turned off, to save the vehicle data information when the electric vehicle is power-off. The battery module (103) is connected with the first management module (101) and the second management module (102) respectively for supplying power to the first management module (101) and the second management module (102). The power supply management device improves the reliability and safety of the vehicle controller.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a power management device for an electric vehicle and an electric vehicle with the power management device. Background technique [0002] The advantages of electric vehicles without pollution make them become the main direction of the current automobile development, so it is of great significance to develop and research the key technologies of electric vehicles. As one of the core components in the electronic control system of electric vehicles, the vehicle controller has become an important research part of electric vehicle technology. The vehicle controller of the electric vehicle is responsible for the comprehensive control of the entire electric vehicle, and its reliability directly affects the reliability of the electric vehicle and is related to the safety performance of the electric vehicle. Among them, the power supply of the vehicle controller has a great infl...

AI Technical Summary

Problems solved by technology

However, the above method cannot meet the requirements of power-on preparation and power-off delay, and cannot meet the safety requirements for electric vehicles with increasingly higher functional safety levels.

[0004] The disadvantage of the existing technology is that the power supply of many current vehicle controllers is controlled by the switch of the key, and it is impossible to perform self-test before the main control chip is powered on, which increases the operating time in the event of a fault. risk

At the same time, some key data and fault information cannot be saved in time and reliably when the power is off

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