Battery System Diagnosis via Load and Non-Load Readings
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Solution Overview
Problem
Current vehicle health management systems diagnose battery system problems as a whole, failing to distinguish between battery-specific issues and connection problems, leading to unnecessary diagnostic efforts and expenses.
Innovation Solution
A method and system that gather load-related and non-load-related readings to diagnose battery system problems, specifically differentiating between battery-specific issues and connection problems by analyzing cranking events and resistance values, using a control module to determine the nature of the problem.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If general battery system diagnosis is performed, then battery system health can be monitored, but diagnostic precision and cost-effectiveness deteriorate due to inability to distinguish between battery-specific and connection problems
Solution Approach 1:
The diagnosis is segmented into two distinct pathways: battery-specific problem diagnosis and connection problem diagnosis. The system divides the diagnostic process by separating load-related readings (for battery-specific issues) from non-load-related readings (for connection issues), enabling precise identification of the problem type without requiring comprehensive testing for both scenarios.
2Reliability
If comprehensive battery system diagnosis is performed, then all potential problems can be detected, but diagnostic time and expense increase
Solution Approach 1:
The diagnostic process is segmented into efficient pathways that detect the most likely problem type first. By using non-load-related readings to quickly identify connection problems versus load-related readings for battery-specific issues, the system reduces diagnostic time while maintaining comprehensive problem detection capability.
Solution Approach 2:
The system performs only the necessary diagnostic actions based on the detected problem type. If connection problems are identified through non-load-related readings, battery-specific testing is omitted. Conversely, if load-related readings indicate battery-specific issues, connection testing is skipped, avoiding unnecessary diagnostic steps.
3Reliability
If general battery system diagnosis is performed, then system health can be assessed, but cost-effectiveness deteriorates due to unnecessary maintenance expenses
Solution Approach 1:
The diagnostic system segments maintenance requirements by problem type, enabling targeted repairs. Connection problems (such as corroded terminals or loose cables) are identified separately from battery-specific issues (such as cell degradation), allowing owners to perform inexpensive connection repairs rather than costly battery replacements when appropriate.
Data Source
AI summary
A method and system for diagnosing battery system problems in a vehicle, where the method distinguishes between problems of various battery system components. More particularly, battery connection problems such as loose connections, corroded battery terminals, etc., may be distinguished from battery system problems as a whole. Load related readings that generally reflect the performance of the battery system during a cranking event and one or more non-load related readings may be gathered and used to determine whether there is a battery system problem and whether there is a battery specific problem. If load related readings and/or non-load related readings fail to indicate a battery specific problem, a battery connection problem may be diagnosed.