Dynamic Current Redistribution for Portable Devices
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Solution Overview
Problem
Portable electronic devices, such as e-readers and smartphones, face frequent battery depletion due to limited internal battery capacity, necessitating frequent charging and the use of external batteries for uninterrupted operation, especially when an outlet charger is not available.
Innovation Solution
A dynamic current redistribution system (DCRS) that dynamically manages power distribution between an electronic device's internal battery and an external battery, optimizing current usage based on device states and connections to external power sources, ensuring maximum charging efficiency and battery conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the internal battery capacity is increased to extend operation time, then the device becomes less portable and heavier
Solution Approach 1:
The battery system is segmented into two separate batteries: an internal battery integrated into the electronic device and an external battery that can be carried separately. This segmentation allows the device to maintain a lightweight design while providing extended operation time through the combination of both batteries.
Solution Approach 2:
A connector serves as an intermediary component that enables the external battery to couple with the internal battery, allowing power transfer and coordination between the two battery systems. This intermediary facilitates the extended operation time without requiring the device itself to carry additional weight.
2Duration of action of moving object
If the external battery is used to extend operation time, then charging management becomes more complex
Solution Approach 1:
The system incorporates feedback mechanisms that monitor the charging states of both internal and external batteries, as well as the connection status. Based on this feedback, the system dynamically adjusts current distribution and charging priorities through policies that manage the complexity of coordinating multiple battery sources.
Solution Approach 2:
The current distribution policy is dynamic rather than static, automatically adjusting power allocation based on real-time device states such as connection status, battery charge levels, and power source availability. This dynamic approach simplifies management by eliminating the need for manual intervention despite the complexity of multiple battery sources.
3Loss of energy
If current is prioritized for internal battery charging when connected to external power source, then external battery power is conserved
Solution Approach 1:
The system changes the parameter of current distribution dynamically based on connection status. When connected to an external power source, the policy parameters are adjusted to prioritize internal battery charging, thereby conserving external battery power while maintaining efficient charging through optimized current allocation.
Data Source
AI summary
Method and systems for dynamic current redistribution in electronic devices with external power storage devices are disclosed. The dynamic current redistribution system includes a set of policies for each state of the electronic device. Depending on a device state, the system identifies the policies to be put in place, and directs current according to the policies. The electronic device may be connected to an external power source in one state, an external battery device in another state, and may be connected to both in a third state.