Wireless Slave BMS Inspection for Communication Error Isolation
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Solution Overview
Problem
Existing battery management systems struggle to accurately determine the soundness of slave battery management systems due to communication link instability, often incorrectly identifying issues as slave errors when they are actually communication errors.
Innovation Solution
Implementing a method where slave battery management systems that do not transmit data receive and store data transmission signals from other systems, allowing the master battery management system to associate these signals with identification information and determine communication errors separately from slave errors, using a receiving unit, noise measurement unit, determination unit, storage unit, and control unit to analyze data and data transmission information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the master battery management system monitors slave BMS through wireless communication, then the system can detect communication issues, but it cannot distinguish between communication errors and slave BMS errors
Solution Approach 1:
The patent introduces an intermediary mechanism where receiving slave BMS units act as mediators. When a slave BMS fails to transmit data, other slave BMS units that successfully receive data from the master BMS can detect the absence of the failed unit's data in the received signal, thereby identifying communication errors versus actual slave BMS failures.
2Measurement precision
If the master battery management system receives data from all slave BMS, then complete monitoring is achieved, but communication instability causes false error identification
Solution Approach 1:
The patent implements a feedback mechanism where the master BMS transmits data to slave BMS units, and the receiving slave BMS units provide feedback by detecting the presence or absence of each transmitter's data in the received signal. This feedback loop enables the system to identify which slave BMS units failed to transmit, allowing differentiation between communication errors and actual system failures.
Data Source
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AI summary
The present invention comprise a master battery management system used for a battery system in which a plurality of slave battery management systems (BMSs) and a master battery management system communicate wirelessly includes: a receiving unit configured to receive, from each slave BMS of the plurality of slave BMSs, data of the corresponding slave BMS and data transmission information of at least one other slave BMS except for the corresponding slave BMS among the plurality of slave BMS during one period in which each of the plurality of slave BMSs transmits data at least once; and a determination unit configured to determine a communication error or an abnormal slave BMS by using the data of the corresponding slave BMS and the at least one other slave BMS data received from each slave BMS during one period, wherein the data transmission information of the at least one other slave BMS is information on a history that the other slave BMS transmits data.