Pure electric passenger vehicle realizes multi-channel remote OTA upgrade method based on CAN bus

Abstract

The invention discloses a multi-channel remote OTA upgrade method for a pure electric passenger car based on a CAN bus, which includes the following steps: Step 1, the manager first tests and verifies the OTA upgrade package, and then verifies the integrity and safety of the upgrade package Finally, the upgrade package is packaged and compressed through platform operations and uploaded to the server, and then the server manages the file, including upgrade package version management, upgrade content management, and upgrade operation log management; step 2, the server will update the upgrade information through The network is released to the corresponding vehicle. During the process of downloading the upgrade package, the vehicle communication terminal maintains the normal supply of power supply and can support the function of resuming transmission from breakpoints to ensure the integrity of the OTA upgrade package; step 3, the vehicle terminal is multi-OTA upgraded Decompress the package; step 4, flash the update file into the ECU.

Description

Technical field: [0001] The present invention relates to a remote OTA upgrade method for each ECU software of a pure electric passenger car, in particular to a multi-channel remote OTA upgrade method for a pure electric passenger car based on a CAN bus, which belongs to the on-board OTA of each ECU of a high-speed pure electric passenger car Upgrade technical areas. Background technique: [0002] As people's requirements for vehicle power, safety and comfort increase, the electronic control unit ECU (Electronic Control Unit) and electronic control systems are also increasing, and the individuation of ECU functions is also constantly increasing and replacing. and necessity, in the entire vehicle life cycle, the software upgrade of the vehicle electronic control system may be repeated or even repeated, except for some upgrades to improve customer satisfaction (such as vehicle infotainment systems, etc.), the more important safety The upgrade may involve the recall of the car,...

AI Technical Summary

Problems solved by technology

Generally speaking: one car has one OBD port, and only one ECU can be upgraded at the same time. It is suitable for simple traditional cars, but its scalability is poor, real-time performance is poor, and the update cost in the market is high. When the functions of system modules increase and the communication information increases, the network load will also continue to increase, which will bring problems such as network congestion and reduced reliability.

[0004] The existing passenger car OTA (Over-the-Air Technology) real-time multi-segment multi-ECU remote OTA technology upgrade is to connect multiple CAN buses to different CAN chips and control logic (TBOX is currently designed to implement 8 CAN lines), each The eMMC memory of the ECU is partitioned into at least 2 areas, of which 1 area is specially used for temporary storage and backup of the upgrade software package. It is easy to develop but powerful, and can be upgraded without loss, mainly through wireless networks (such as 4G module TBox) Automatically download the OTA upgrade package and automatically upgrade. In order to avoid OTA remote upgrade, it may occupy a large CAN bus network bandwidth, which will cause excessive CAN bus load, which will affect driving and cause safety problems. It will be carried out in a special partition of the eMMC memory Storage and backup, automatically detect whether to upgrade next time you power on

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