Battery management system and communication method in system

Abstract

The invention discloses a battery management system and a communication method in the battery management system. The method comprises the following steps that: a master control BMU determines a firstfault unit which is abnormally communicated with the master control BMU from a plurality of managed units, and sends a fault frequency which is abnormally communicated with the first fault unit to a standby BMU; the standby BMU selects a managed unit which normally communicates with the standby BMU and the first fault unit from the plurality of managed units as a first target unit; first frequencyconversion information is sent to the first fault unit through the first target unit based on the fault frequency standby BMU, wherein the first frequency conversion information indicates that the first fault unit becomes a first frequency; the first fault unit is converted into a first frequency; if the standby BMU communicates with the first fault unit normally by using the first frequency, thefirst frequency is sent to the main control BMU; the master BMU communicates with the first faulty unit using the first frequency. According to the battery management system and the communication method in the battery management system provided by the embodiment of the invention, the reliability of communication in the battery management system is improved.

Description

technical field [0001] The invention relates to the battery field, in particular to a battery management system and a communication method in the system. Background technique [0002] An existing battery management system (Battery Management System, BMS) includes: a battery management unit (Battery Management Unit, BMU) and a plurality of managed units. The managed units include a cell measurement circuit (CMC), a current sensor, a pressure sensor, a humidity sensor, a smoke sensor and other devices. [0003] As the core control unit of the BMS, the BMU is responsible for data interaction with each managed unit, and can complete tasks such as command requests and data uploads. Before normal communication between the BMU and the managed unit, physical serial number encoding is required. After the BMU encoding is completed, the managed unit collects data such as voltage, temperature, current, and diagnosis, and reports it to the BMU through wireless signals periodically or e...

AI Technical Summary

Problems solved by technology

[0004] However, due to various factors such as the structural layout of the battery management system, interference signals, and multipath fading phenomena, various communication abnormalities such as poor communication or communication interruption between the BMU and a managed unit will result, thereby reducing battery management. reliability of communication in the system

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