Remote online updating method and system for battery management unit

Abstract

The invention provides a remote online updating method and system for a battery management unit. The method comprises the following steps that a vehicle-mounted receives updating code data from an FTP file server and then reads the updating code data and sends the same to a battery management unit when a downloading affirmation value is expected answer data; the battery management receives the updating code data and writes the updating codes into a user code area in a flash storage when an updating mark value is three, a preset valve; and a program in the user code area is operated. The invention further provides a remote online updating system comprising a management server, an FTP server, a vehicle-mounted control end and a battery management unit. Software of the battery management unit can be updated; great reliability and stability can be achieved; a technical problem of operation collapse after battery management unit software updating can be solved; and battery management unit operation stability can be improved.

Description

technical field [0001] The invention relates to the technical field of battery management systems, in particular to a remote online upgrade method and system for battery management units. Background technique [0002] The battery management unit ("BMU" for short) is the main control and management unit of the battery management system ("BMS" for short), which can control other sub-units inside the battery management system, such as the battery detection unit and insulation detection unit. And external communication, so as to realize the functions of charge and discharge management, thermal management, overvoltage protection, undervoltage protection, overcurrent protection and battery remaining power estimation for power lithium batteries. In the actual application process, based on changes in application function requirements, the software embedded in the battery management unit needs to be upgraded. [0003] There are two traditional ways to upgrade the software embedded i...

AI Technical Summary

Problems solved by technology

[0003] There are two traditional ways to upgrade the software embedded in the battery management unit: the first way is to use a dedicated downloader (or compiler) to connect with the unit module in the vehicle control terminal, and transmit the upgrade code data to the vehicle control terminal , so as to complete the upgrade operation. During the upgrade process, the box of the battery management unit needs to be disassembled. The actual operation is more complicated and requires the staff to have higher professional knowledge and skills; the second way is that the host computer communicates with CAN through the serial port The interface is connected to the vehicle control terminal, and the upgrade code data is transmitted to the battery management unit to complete the upgrade operation. This upgrade method does not need to disassemble the battery management unit box, and does not require a special downloader. The actual operation is relatively simple and the upgrade cost is relatively low. Low, but this upgrade method has a certain bit error rate, and only requires the staff to have certain professional knowledge and skills

[0004] At the same time, the above two upgrade methods are both manual upgrade methods. In the actual application process, due to the extremely scattered locations of the vehicles equipped with battery management units, due to the consideration of operating costs, the manual upgrade method is not suitable. Suitable for large-scale upgrades of battery management units

The remote wireless upgrade method solves the problem that the manual upgrade method is not suitable for the large-scale upgrade of the battery management unit. However, due to the influence of subjective and objective factors, the existing remote wireless upgrade method still has a certain bit error rate and upgrade Therefore, how to improve the stability and reliability of the battery management unit upgrade, reduce the bit error rate of its software upgrade, and how to prevent the operation crash after the battery management unit upgrade fails, so as to improve the stability of the battery management unit operation Sex and reliability are technical problems that need to be solved urgently

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