Battery Management System Wake-Up Circuit for Mobile X-Ray
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Solution Overview
Problem
Mobile X-ray apparatuses face challenges in performing X-ray imaging on patients with mobility issues due to the need for a specific examination room, and existing battery management systems (BMS) can shut down, disrupting operations.
Innovation Solution
A mobile X-ray apparatus with a battery management system (BMS) that includes a DC-DC converter, field effect transistors (FETs) for power control, and a charger to wake up the BMS when shut down, allowing for remote operation and power management to prevent battery overcharge/discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the battery management system (BMS) is shut down to conserve power, then energy consumption is reduced, but the system cannot perform X-ray imaging operations
Solution Approach 1:
The charger is configured to automatically wake up the BMS from shutdown state when power is supplied, preparing the system for operation before actual use. This preliminary action ensures the BMS is ready to manage battery power immediately when needed, resolving the contradiction between power conservation and operational readiness
2Loss of energy
If the first switch is turned off to prevent power supply to DC-DC converter during BMS shutdown, then power loss is reduced, but the BMS cannot be reactivated
Solution Approach 1:
The first switch acts as an intermediary component that can be independently controlled. During BMS shutdown, it prevents power loss by blocking power to DC-DC converter, but can be turned on by the charger to enable BMS reactivation. This intermediary function resolves the contradiction between energy conservation and system reliability
3Ease of operation
If the mobile X-ray apparatus is made portable for patients with mobility issues, then accessibility is improved, but power management complexity increases
Solution Approach 1:
The charger serves multiple functions: it charges the battery, wakes up the BMS from shutdown state, and activates the first switch to restore power supply. This multi-functionality reduces the need for separate control mechanisms, managing the complexity of the portable power system while maintaining ease of operation
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
Enables the mobile X-ray apparatus to operate effectively by waking up the BMS when shut down, ensuring continuous power supply and safe battery management, facilitating X-ray imaging without space limitations.
Implementation Method 1
a first switch comprising a field effect transistor (FET) and configured to be turned off according to the first signal to prevent power from being supplied to the DC-DC converter
Implementation Method 2
a direct current DC-to-DC (DC-DC) converter configured to convert the power supplied by the battery into a driving power for driving the battery management system (BMS)
Data Source
AI summary
Provided is a mobile X-ray apparatus including: an X-ray radiator configured to emit X-rays; a battery configured to supply power to the X-ray radiator; a charger configured to charge the battery; a battery management system (BMS) configured to receive power from the battery or the charger and output a first signal based on a state of the battery; and a first switch configured to be turned off according to the first signal to prevent power from being supplied to the BMS, wherein the first switch is further configured to be turned on by power supplied from the charger when the BMS is shut down.