Battery Pack Fault Correlation to Prevent False Disconnection
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Solution Overview
Problem
Existing energy storage systems in vehicles often experience unnecessary and undesirable disconnections of battery packs due to mis-triggered or mis-interpreted faults or errors in voltage measurements, leading to reduced availability of the energy storage system.
Innovation Solution
A computer system with processing circuitry is configured to identify faults or errors in voltage measurements of multiple battery packs and, if corresponding faults or errors are detected within a specific time interval, prevent the disconnection of at least one battery pack, thereby assuming the issue is mis-triggered rather than authentic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disconnection protection is implemented for multiple battery packs, then system availability is improved, but response time to authentic faults may be delayed
Solution Approach 1:
The system dynamically adjusts its response based on the fault pattern detected. For mis-triggered faults identified through multi-pack correlation, it applies protection and prevents disconnection. For authentic faults that do not show corresponding patterns across multiple packs, the system maintains rapid disconnection capability, thus dynamically optimizing between availability and response time.
Solution Approach 2:
The protection mechanism applies locally only to battery packs exhibiting correlated fault patterns indicative of mis-triggering. Individual battery packs with unique, uncorrelated fault detections still undergo normal disconnection procedures, ensuring that protection is applied precisely where needed without compromising overall system response time.
Data Source
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AI summary
A computer system (17, 117) comprising processing circuitry (118) configured to: identify a fault or error from a voltage measurement in a first battery pack (31, 131) of an energy storage system (30, 130) at a first point in time (t1) and during a first time interval (dt); identify a corresponding fault or error from a voltage measurement in a second battery pack (32, 33, 132, 133) of the energy storage system (30, 130) at a second point in time (t2) and during the first time interval (dt), the second point in time (t2) being subsequent to the first point in time (t1); in response of identifying the corresponding faults or errors of the voltage measurements in the first and second battery packs (31, 32, 33, 131, 132, 133) during the first time interval (dt), prevent disconnection of at least the second battery pack (32, 33, 132, 133).