BMS Voltage Cycle Diagnosis Through Reference Transition Counting
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Solution Overview
Problem
Existing battery management systems (BMS) require time-consuming manual efforts to check their measuring cycles, and existing diagnostic methods are inefficient in determining normal operation.
Innovation Solution
A measuring device and diagnostic system that includes a voltage measurer to measure voltage from a node connected to the BMS, a controller to count the number of times the voltage reaches a reference voltage, and an output device to determine the BMS's state as normal or abnormal based on predefined ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual checking of BMS measuring cycle is performed using oscilloscope and screen manipulation, then the BMS operation can be diagnosed, but the diagnostic process takes excessive time
Solution Approach 1:
The BMS performs self-diagnosis by automatically monitoring its own measuring cycle through an external device that counts voltage signal transitions. The system autonomously provides diagnostic information without requiring manual intervention, thus reducing diagnostic time while maintaining reliability
Solution Approach 2:
The manual mechanical operation of oscilloscope and screen manipulation is replaced by an automated electronic counting system that measures voltage signal transitions and determines BMS status automatically, eliminating time-consuming manual procedures
2Reliability
If existing diagnostic methods are used to determine BMS normal operation, then diagnosis can be performed, but mode determination accuracy is insufficient
Solution Approach 1:
The system uses feedback by counting the number of times the voltage signal reaches reference voltage within a measuring period, comparing this count against expected ranges for different modes, thereby accurately determining BMS operational status and improving measurement precision
Solution Approach 2:
The diagnostic approach changes from qualitative manual assessment to quantitative measurement by counting voltage transition frequency, using the count value as a precise parameter to determine BMS mode and improve determination accuracy
Data Source
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AI summary
An embodiment provides a measuring device, including: a voltage measurer measuring a voltage from a node on a wire connected to a battery management system (BMS); and a controller that receives the measured voltage signal from the voltage measurer to derive a voltage value, counts the number of times the voltage value reaches a reference voltage during a measuring period, and determines a state of the BMS as one of a normal state of a first mode, a normal state of a second mode, and an abnormal state based on the number of times.