Implantable Medical Device Battery Longevity Estimation
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Solution Overview
Problem
Current methods for predicting the longevity of implantable medical devices (IMDs) are inaccurate due to oversimplifications, leading to errors in estimating the remaining battery life of IMDs, which are crucial for clinical decision-making.
Innovation Solution
A method that separates the battery capacity range into multiple intervals, determining the time it takes for the battery to discharge from an initial capacity level to a subsequent level by calculating the estimated current consumption during each interval, allowing for a more accurate estimation of the total battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If current methods for predicting IMD longevity are used, then the prediction process is simple, but the measurement precision of longevity prediction deteriorates due to oversimplifications
Solution Approach 1:
The battery capacity range is divided into multiple intervals, with each interval having its own estimated current consumption. This segmentation allows the prediction method to account for varying current consumption at different capacity levels, significantly improving prediction accuracy without requiring overly complex computational methods.
2Device complexity
If a single average current consumption is used for the entire battery capacity range, then the calculation is simplified, but the measurement precision of longevity estimation deteriorates due to varying current consumption over time
Solution Approach 1:
Instead of using a single average current consumption value for the entire battery capacity range, the method segments the capacity range into multiple intervals and assigns a specific estimated current consumption to each interval. This approach captures the variation in current consumption over time while maintaining relatively simple calculations.
Data Source
AI summary
Described herein are methods, devices, and systems that estimate a total amount of time it takes to discharge a battery of an IMD from initial to subsequent capacity levels, which total amount of time is indicative of a longevity of the IMD. In certain embodiments, a range of capacity levels for the battery is separated into N separate intervals. For each of the N intervals, an estimate of an amount of time it takes for the battery to discharge from a beginning to an end of the interval is determined, to thereby determine N amounts of time that are summed to estimate the total amount of time that it takes to discharge the battery from the initial to subsequent capacity levels. In other embodiments, an iterative equation is used to estimate the total amount of time takes it takes to discharge the battery from the initial to subsequent capacity levels.