Dual-Path Power Supply Module for Wearable Drug Delivery Storage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drug delivery devices face challenges in achieving a prolonged shelf life with minimal user intervention and efficient power management, particularly in devices with built-in batteries, as they either require manual handling or complex electronic switches that increase power consumption during storage.
Innovation Solution
A microprocessor-controlled power supply module with a power select line and a dual power supply circuitry, comprising a DC-DC converter and a bypass circuit with a diode and FET transistor, allows seamless switching between storage and active modes, optimizing power usage and minimizing leakage current during storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If an electromechanical switch is used to cut off battery supply in storage mode, then power consumption in storage mode is reduced to zero, but an extra manual handling step is required by the user
Solution Approach 1:
The patent replaces the electromechanical switch with an electronic switching mechanism implemented through circuitry (specifically, a P-channel MOSFET transistor controlled by an N-channel MOSFET transistor). This substitution eliminates the need for manual mechanical operation while achieving the same power cutoff function, thereby resolving the contradiction between reducing power consumption and maintaining ease of operation.
2Ease of operation
If an electronic switch controlled by a microprocessor is used, then no extra manual handling step is required, but power consumption in storage mode increases due to the microprocessor and switch circuitry
Solution Approach 1:
The patent segments the power supply circuitry into two distinct pathways: a first power supply circuitry for active mode operation and a second power supply circuitry for storage mode operation. This segmentation allows the system to automatically select the appropriate power path based on operational state, enabling automatic switching without continuous microprocessor intervention and thereby reducing storage mode power consumption while maintaining ease of operation.
Solution Approach 2:
The patent introduces intermediary circuit elements (specifically, P-channel and N-channel MOSFET transistors) that act as electronic switches between the battery and the two power supply circuitries. These intermediaries enable automatic power path selection based on voltage conditions without requiring continuous microprocessor control, thus reducing storage mode power consumption while maintaining automatic switching capability.
3Power
If a DC-DC converter is used to provide voltage levels for drug delivery, then sufficient power is available in active mode, but power consumption in storage mode increases
Solution Approach 1:
The patent segments the power supply architecture into two distinct circuitries: a first power supply circuitry containing the DC-DC converter for active mode operation, and a second power supply circuitry for storage mode operation. This segmentation allows the DC-DC converter to be completely disconnected from the battery during storage mode, eliminating its power consumption in that state while ensuring it is fully operational during active mode for providing the required voltage levels.
Solution Approach 2:
The patent implements dynamic switching between two power supply configurations based on operational mode. During active mode, the DC-DC converter is activated to provide regulated voltage levels. During storage mode, the system dynamically switches to a direct battery connection through the second power supply circuitry, eliminating the DC-DC converter's power consumption. This dynamic reconfiguration resolves the contradiction between power availability and storage power consumption.
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
The solution extends the shelf life of wearable drug delivery devices by ensuring sufficient battery power for drug delivery while reducing power consumption in storage mode without additional user steps, maintaining stable voltage levels and efficient current supply during active use.
Implementation Method 1
a first power supply circuitry PWR1 having a converter input power line connected to the battery, a DC-DC converter and a converter output power line connected to the motor
Implementation Method 2
a second power supply circuitry having a first input power line connected to the battery, a second input power line connected to the converter output power line, and a control output power line connected to the control circuitry; configured to conduct electric current from the first input power line or the second input power line to the control output power line
Data Source
Figure 1~2a
Figure 2b~3
Figure 4a~4b
AI summary
The present invention describes a mobile or wearable drug delivery device with a battery, a control circuitry and an improved power supply module. The power supply module includes a first power supply circuitry configured to providing electric current to the control circuitry in an active drug delivery mode, and a second power supply circuitry configured to bypass the first power supply circuitry and to provide electric current to the control circuitry in a storage mode. The control circuitry includes a power select line configured to switch the second power supply module from storage mode to active mode. The second power supply circuitry may comprise a diode and a FET transistor. The control circuitry may use an activation signal from a start circuitry to trigger a change from storage mode to active mode.