Temperature-Adaptive Charging Circuit for Wound Therapy Power Sources
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Solution Overview
Problem
Existing negative pressure wound therapy systems face challenges in efficiently managing power source charging to prevent damage from extreme temperatures and ensure safe operation, particularly when environmental conditions or internal heat sources affect the power source's temperature range.
Innovation Solution
A charging circuit that monitors and adjusts charging power based on the power source's temperature, employing multiple charging modes (fast and slow) to maintain the power source within safe operational ranges, and disables charging or discharging when temperature thresholds are exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fast charging power is provided to the power source, then charging speed is improved, but temperature of the power source increases which may cause damage
Solution Approach 1:
The charging circuit dynamically adjusts the charging power level based on real-time temperature monitoring of the power source. When temperature is within safe range, fast charging power is applied; when temperature approaches threshold, the circuit automatically reduces power to prevent damage, creating a dynamic balance between charging speed and thermal safety
Solution Approach 2:
The system implements a feedback mechanism where the charging circuit continuously monitors power source temperature and uses this information to regulate charging power output. This closed-loop control ensures that charging speed is optimized while maintaining temperature within safe operational limits, preventing thermal damage to the power source
2Productivity
If charging continues without temperature monitoring, then charging efficiency is maintained, but risk of power source damage from extreme temperatures increases
Solution Approach 1:
The charging circuit is configured to proactively monitor power source temperature throughout the charging process and take preventive action by reducing or stopping charging power before dangerous temperature levels are reached. This preliminary intervention prevents thermal runaway and ensures power source reliability while maintaining efficient charging operation
3Reliability
If temperature threshold is set low to ensure safety, then power source protection is improved, but charging time increases due to reduced charging power
Solution Approach 1:
Rather than using a fixed low temperature threshold that would always limit charging power, the system dynamically adjusts the charging power level in response to actual temperature conditions. This allows aggressive charging when safe and conservative charging when needed, optimizing the balance between protection and charging time
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures safe and efficient charging of the power source, preventing damage and ensuring reliable operation of the negative pressure wound therapy system by maintaining the power source within safe temperature limits.
Implementation Method 1
a charging circuit configured to monitor a temperature of the power source and charge the power source
Implementation Method 2
provide a first charging power to the power source. The charging circuit can be further configured to in response to a determination that the temperature of the power source has reached or is above the temperature threshold, lower the first charging power to a second charging power
Data Source
AI summary
Embodiments of negative pressure wound therapy devices, systems and methods are disclosed. In some embodiments, a negative pressure wound therapy device includes a negative pressure source configured to provide negative pressure to a wound via a fluid flow path, a power source configured to power the negative pressure source, and a charging circuit configured to monitor a temperature of the power source and charge the power source. The charging circuit can be further configured to in response to a determination that the temperature of the power source is below a temperature threshold, provide a first charging power to the power source. The charging circuit can be further configured to in response to a determination that the temperature of the power source has reached or is above the temperature threshold, lower the first charging power to a second charging power.