Mobile Device Power Management with Dual Battery Segmentation
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Solution Overview
Problem
Mobile devices with built-in batteries face portability issues when the battery is completely discharged, as they require external power sources for operation, limiting their use without a commercial power supply.
Innovation Solution
A mobile device configuration that prioritizes power supply from a secondary battery over a primary battery, using a power management system to ensure stable operation by charging and utilizing the secondary battery's greater capacity for extended portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a mobile device uses only a built-in battery, then the device maintains portability, but the device cannot operate when the battery is completely discharged without external power sources
Solution Approach 1:
The power supply system is segmented into two independent battery units: a built-in battery (first battery) integrated into the device and a separate portable battery (second battery) that can be attached or detached. This segmentation allows the device to extend operation duration by utilizing the second battery when the first battery is depleted, while maintaining the option to use only the built-in battery for simpler portability scenarios.
Solution Approach 2:
The power supply system is designed to support multiple functions: it can operate using only the built-in battery for basic portability, switch to the portable battery when extended operation is needed, and allow the portable battery to charge the built-in battery. This multi-functionality resolves the contradiction by providing flexible operation duration without permanently increasing device complexity.
2Duration of action of moving object
If a mobile device adds a second battery for extended operation, then the device can operate longer without external power, but the device structure becomes more complex
Solution Approach 1:
The power supply system is segmented into two independent battery units: a built-in battery (first battery) integrated into the device and a separate portable battery (second battery) that can be attached or detached. This segmentation allows the device to extend operation duration by utilizing the second battery when the first battery is depleted, while maintaining the option to use only the built-in battery for simpler portability scenarios.
Solution Approach 2:
The power supply configuration is made dynamic rather than static. The system can switch between using only the first battery, using the second battery, or having the second battery charge the first battery based on operational needs. This dynamic adaptability allows the device to optimize between operation duration and structural complexity depending on the situation.
3Reliability
If the device prioritizes using the second battery, then the device can maintain stable operation even when the second battery is close to discharge, but the power management system becomes more complex
Solution Approach 1:
The power management system incorporates feedback mechanisms that continuously monitor the charge states of both batteries and automatically control the power supply switching. When the first battery becomes depleted, the system detects this state and switches to the second battery. When the second battery becomes depleted, the system switches back to the first battery or allows the second battery to charge the first battery, ensuring stable operation throughout the process.
Solution Approach 2:
A power management unit acts as an intermediary between the two batteries and the drive element. This intermediary component handles the complex logic of battery selection, switching, and charging coordination, isolating the complexity from the rest of the system while ensuring reliable and stable power supply to the drive element regardless of battery states.
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
Enhances portability by ensuring the device can operate stably even when the secondary battery is close to discharge, allowing continued use without relying on external power sources for longer periods.
Implementation Method 1
a first battery which outputs power
Implementation Method 2
power output by a second battery
Data Source
AI summary
A mobile device includes a drive element, a first battery which outputs power, and a supplying unit which supplies the power output by the first battery or power output by a second battery to the drive element, in which the supplying unit prioritizes supplying of the power output by the second battery to the drive element over the power output by the first battery.