BMS Insulation Element Diagnosis via Signal Bit Analysis
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Solution Overview
Problem
The existing battery management systems (BMS) lack a method to autonomously diagnose abnormalities in insulation elements, leading to potential erroneous operations and stability issues, such as battery pack explosions, due to undetected problems in transmitted diagnosis information across voltage regions.
Innovation Solution
A system that compares battery pack diagnosis signals and communication signals across the insulation element's input and output terminals using differential amplifiers and XOR/OR gates to determine abnormal operations based on bit operation values, enabling early detection of insulation element issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If insulation element is used to divide high-voltage and low-voltage regions in BMS, then electrical insulation and safety are improved, but reliability deteriorates due to undetected abnormalities causing erroneous operations
Solution Approach 1:
The patent implements preliminary diagnosis actions by continuously monitoring communication signals passing through the insulation element before abnormalities cause erroneous operations. The BMS detects insulation element status proactively through bit operation analysis of transceived signals, enabling early intervention before safety issues arise.
Solution Approach 2:
The patent establishes a feedback mechanism where the BMS transmits diagnosis signals through the insulation element and analyzes the returned signals to determine insulation status. This closed-loop feedback system continuously provides information about insulation element health, allowing the system to respond to abnormalities and maintain reliability while preserving electrical insulation safety.
2Loss of information
If insulation element transmits diagnosis information across voltage regions, then battery cell monitoring capability is improved, but stability deteriorates due to undetected abnormalities in transmitted information
Solution Approach 1:
The patent uses communication signals as an intermediary medium to transmit diagnosis information across the insulation element. By analyzing the characteristics of these intermediary signals (bit operation values, signal integrity), the system can verify information transmission accuracy without direct electrical connection, maintaining both information flow and system stability.
Solution Approach 2:
The patent replaces direct electrical connection for diagnosis information transmission with optical or electromagnetic communication through the insulation element. This substitution allows information transfer while maintaining electrical isolation, and enables signal analysis to detect abnormalities without compromising system stability.
3Device complexity
If no autonomous diagnosis method is implemented for insulation element, then device complexity is reduced, but harmful factors increase due to potential battery pack explosions from undetected failures
Solution Approach 1:
The patent implements self-service diagnosis where the BMS autonomously monitors its own insulation element using existing communication infrastructure. The system uses its own communication signals to diagnose insulation status without requiring external diagnostic equipment, enabling safety monitoring while minimizing additional device complexity.
Solution Approach 2:
The patent makes the communication element serve dual functions: transmitting diagnosis information and simultaneously acting as a diagnostic sensor for insulation element status. This multi-functionality approach enables abnormality detection without adding separate dedicated diagnosis hardware, thus limiting complexity increase while reducing harmful factors.
Data Source
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AI summary
The present invention relates to a system for diagnosing an insulation element within a battery management system (BMS), in which an input terminal and an output terminal of an insulation element obtain a battery pack diagnosis signal that is output through a battery monitoring circuit and passes through the insulation element, and then abnormality of the insulation element is diagnosed based on a bit operation value of the obtained battery pack diagnosis signal, or an input terminal and an output terminal of the insulation element obtain a transceived communication signal and then abnormality of the insulation element is diagnosed based on a bit operation value of the obtained transceived communication signal.