Programmable Battery Dynamic Power Adjustment
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Solution Overview
Problem
Existing portable communications devices face inefficiencies in converting battery voltage to amplifier bias voltage, resulting in wasted battery capacity due to inefficient power conversion, which affects the adjustment of RF output power according to network requirements.
Innovation Solution
A programmable battery system that dynamically adjusts power characteristics based on received power configuration commands, utilizing a switch matrix and power converter to optimize power delivery to device subsystems, such as variable-gain power amplifiers, to match network power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a DC/DC converter is used to adjust RF output power by varying DC bias, then the RF power can be adjusted according to network requirements, but the conversion from battery voltage to amplifier bias voltage is inefficient and much battery capacity is wasted as heat
Solution Approach 1:
The battery array is divided into multiple individually controllable battery cells. The switch matrix can selectively connect different numbers of battery cells in series to different device subsystems, enabling granular power control without energy conversion losses. This segmentation allows direct voltage matching between battery cells and subsystem requirements.
Solution Approach 2:
A switch matrix is introduced as an intermediary between the battery array and device subsystems. This switch matrix dynamically reconfigures the connection topology, selecting which battery cells supply power to which subsystems. This intermediary enables efficient power distribution by directly connecting appropriate battery cells to subsystems without requiring DC/DC conversion.
2Adaptability or versatility
If a DC/DC converter is used to vary DC bias for power amplifier, then the amplification can be adjusted, but the power conversion efficiency deteriorates due to heat generation
Solution Approach 1:
The invention changes the control parameter from adjusting voltage through DC/DC conversion to adjusting the number of battery cells in series. By varying the series connection count of battery cells, the output voltage is directly changed to match the amplifier's bias requirements, eliminating conversion inefficiencies while maintaining full gain adjustment capability.
3Device complexity
If traditional battery power delivery is used, then the system is simple, but the battery capacity is not optimized for varying power requirements of different subsystems
Solution Approach 1:
The power delivery system is made dynamic through the switch matrix, which continuously reconfigures the battery array configuration based on real-time power requirements of different subsystems. This dynamic adaptation allows the system to optimize battery capacity utilization for each subsystem's specific needs while maintaining relative structural simplicity.
Data Source
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AI summary
A portable electronics device comprises at least one device subsystem, and a programmable battery. The programmable battery is coupled to a power input of the device subsystem and is configured to dynamically adjust a characteristic of the power that is applied to the power input in accordance with a power configuration command that is received at the battery.