Infusion Pump Battery Storage Control for Over-Discharge Prevention
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Solution Overview
Problem
Existing methods for protecting rechargeable batteries from over-discharge during storage are either user-intervention dependent or mechanically disconnecting, leading to logistical issues or performance limitations, and current smart battery packs provide insufficient storage duration with fixed thresholds.
Innovation Solution
A method and system that utilizes software to monitor the state of charge (SOC) of a rechargeable battery, commanding it to enter a low power state when below a variable threshold, and activating a timer to periodically check SOC, allowing the battery to be safely stored without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed threshold is used for smart battery packs to shut down output, then the battery is protected from over-discharge, but the storage duration is insufficient
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed shutdown threshold to a variable threshold system. The threshold dynamically adjusts based on the battery's age, charge history, and environmental conditions. This allows the battery management system to optimize between protection and storage duration by adapting the shutdown point to current battery characteristics rather than using a static value.
Solution Approach 2:
The patent implements parameter changes by modifying the shutdown threshold parameter based on multiple factors including battery cycle count, temperature, and charge-discharge patterns. The system continuously monitors battery parameters and adjusts the shutdown threshold accordingly, enabling extended storage duration while maintaining adequate protection against over-discharge.
2Reliability
If the battery is mechanically disconnected to prevent over-discharge, then the battery is protected, but the system cannot perform passive actions like self-initiated restarting
Solution Approach 1:
The patent introduces an intermediary battery management system that remains electrically connected to the battery while providing protection. This intermediary layer monitors battery voltage and can disconnect specific protection circuits while maintaining overall system connectivity, enabling both over-discharge protection and automated functions like self-restarting without requiring complete mechanical disconnection.
Solution Approach 2:
The patent replaces mechanical disconnection with electronic control mechanisms. Instead of physically disconnecting the battery through mechanical switches or connectors, the system uses electronic circuitry to control power flow and protect against over-discharge. This substitution maintains electrical connectivity while achieving protection, thereby preserving automated system functions.
3Reliability
If the battery is removed from the system to prevent over-discharge, then the battery is protected, but logistical issues arise such as misplacement and improper reattachment
Solution Approach 1:
The patent implements self-service by enabling the battery management system to automatically monitor and protect the battery without user intervention. The system continuously checks battery status and autonomously takes protective actions when needed, eliminating the need for users to remove the battery for protection while avoiding logistical issues associated with manual handling and reattachment.
4Reliability
If the device continuously monitors battery state, then over-discharge is prevented, but energy is consumed during storage
Solution Approach 1:
The patent applies periodic action by implementing intermittent monitoring instead of continuous monitoring during storage mode. The battery management system checks battery voltage at predetermined intervals rather than constantly, reducing energy consumption while still providing adequate protection against over-discharge. The monitoring frequency adjusts based on battery state and environmental conditions.
Solution Approach 2:
The patent implements partial monitoring by focusing surveillance on critical parameters only during storage, such as voltage thresholds, rather than monitoring all battery parameters continuously. This selective monitoring approach provides sufficient protection while minimizing energy consumption during extended storage periods.
Data Source
AI summary
A method for extending the storage lifetime of a rechargeable battery located in a device is disclosed. The battery lifetime extension method includes providing a device that derives its power from a rechargeable battery. When the device is powered off by a user, a computer implemented program utilized by the device automatically powers up the device into a lower power mode upon expiration of a variable duration timer monitored by the computing unit that continuously repeats according to a programed duration cycle. The computer implemented program then evaluates a state of charge of the rechargeable battery, determines whether the state of charge of the rechargeable battery is above or below a variable programed threshold, and causes the rechargeable battery to remain in a low power state until a charge is applied to the rechargeable battery.