Battery Cell Abnormality Detection via Differential Voltage
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Solution Overview
Problem
Existing technologies for detecting abnormal battery cells in storage batteries require complex calculations of average voltage values, making the process cumbersome and prone to erroneous aging deterioration identification.
Innovation Solution
An information processing apparatus that calculates a first differential voltage between a battery cell's voltage after charging and its voltage after a predetermined time, and determines abnormalities by comparing this value with the next largest differential voltage, allowing for simple and accurate detection of unexpected issues like leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If average voltage values are calculated to detect abnormal battery cells, then detection capability is achieved, but process complexity increases
Solution Approach 1:
The patent extracts only the necessary voltage measurements (immediate post-charging voltage and voltage after predetermined time) without requiring calculation of average values across all battery cells. This selective extraction of critical data points simplifies the detection process while maintaining abnormality detection capability.
Solution Approach 2:
Instead of comparing each battery cell's voltage to the group average (conventional approach), the patent inverts the approach by directly comparing differential voltages between specific time points. This inversion eliminates the need for average value calculations and reduces process complexity.
2Reliability
If average voltage comparison method is used, then abnormality detection is performed, but time consumption increases
Solution Approach 1:
The patent performs preliminary voltage measurements at specific time points (immediately after charging and after predetermined time) without waiting for complete charging cycles or requiring multiple measurements for average calculation. This preliminary action at critical moments reduces detection time while maintaining accuracy.
Solution Approach 2:
The patent skips unnecessary intermediate steps such as calculating average voltages and performing complex comparisons. By directly comparing differential voltages between two specific time points, the method rushes through the detection process efficiently without sacrificing detection accuracy.
3Measurement precision
If voltage measurements are taken at multiple time points, then detection accuracy improves, but measurement complexity increases
Solution Approach 1:
The patent applies local quality by focusing measurements at specific critical time points (immediately after charging completion and after predetermined time) rather than continuously monitoring. This localized measurement approach maintains precision where it matters most while reducing overall measurement complexity.
Data Source
AI summary
An information processing apparatus (2000) detects a battery cell in which an abnormality (for example, leakage) occurs among a plurality of battery cells connected in series. A first differential voltage acquisition unit (2020) acquires a first differential voltage for each of the plurality of battery cells. The first differential voltage of the battery cell is a difference between a voltage of the battery cell after charging is completed and a voltage of the battery cell at a time when an operation is performed for a predetermined time after charging is completed. A determination unit (2040) determining that an abnormality occurs in a first battery cell, in a case where a difference between the first differential voltage of the first battery cell and the first differential voltage of a battery cell having a next largest first differential voltage of the first battery cell, is greater than or equal to a first predetermined value.