Remote upgrading method for vehicle control unit of new energy bus

Abstract

A remote upgrading method of a new energy bus vehicle control unit comprises the following steps that a vehicle-mounted terminal receives an upgrading package sent by a background server and periodically sends a remote upgrading request instruction to the vehicle control unit; after the vehicle control unit judges that the vehicle state meets the remote upgrading condition, the vehicle control unit makes a remote upgrading response; the vehicle control unit starts a remote upgrading mode, remote upgrading safety verification is conducted, and remote upgrading operation is started after verification is confirmed to be passed; and the vehicle control unit downloads the upgrade package to the transition area, then updates codes on the interrupt vector address and the reset address of the application program on the premise that the CPU is not under-voltage, copies the upgrade package code to the target address, and finally restarts the vehicle control unit to execute a new-version vehicleprogram. The method realizes efficient, safe and stable remote upgrading, and has the advantages of simple operation, high accuracy, high success rate, high safety performance and the like.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a remote upgrade method for a vehicle controller of a new energy bus. Background technique [0002] The vehicle controller (VCU) of the new energy bus is the core component of the vehicle control system, and it is the core control device used to control the start, operation, advance and retreat, speed, stop and other electronic devices of the motor. At present, the new energy bus industry is a customer-customized model. Basically, the vehicle controller program for each batch of orders is different. After the vehicle is delivered to the customer, the customer often puts forward various special needs and requires the OEM to pass the update. Vehicle controller program to optimize the vehicle control strategy. In addition, the vehicle often encounters a bug in the vehicle controller and needs to update the program. Therefore, it is often necessary to continuously upgrad...

AI Technical Summary

Problems solved by technology

[0003] The traditional vehicle controller upgrade method is online upgrade, which usually requires after-sales personnel to carry laptops and flashing tools to the user's site to update the program one by one, or requires the user to drive the car to the service station for operation. This online upgrade method is not only cumbersome to operate , the efficiency is low, and it is easy to prevent the vehicle controller from being upgraded in time, which has a certain lag

[0004] With the continuous development of Internet of Vehicles technology, the upgrade method of the vehicle controller has gradually evolved into a remote upgrade method, but most of the existing remote upgrade methods have the following problems: First, due to the unreasonable upgrade program design, remote upgrade Usually, it is not possible to perform isolated upgrades in a safe area. If the upgrade fails due to unexpected circumstances, it will cause the phenomenon that the vehicle controller cannot be used normally. Second, the upgrade package is easily attacked and tampered with during the sending process. There is a big security risk in the way

Images