Switchable Capacitor Voltage Divider for Multi-Voltage Battery Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable electronic devices with rechargeable batteries face frequent discharging, necessitating daily recharging, which limits their portability during charging due to the need for external power sources.
Innovation Solution
An electronic device equipped with a voltage divider comprising capacitors and switches that adaptively change voltage division ratios, allowing the processor to control charging based on received power indicators from external devices, enabling efficient charging by dividing and managing voltage and current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed voltage division ratio is used in the voltage divider, then the circuit structure is simple, but the charging time is long and charging efficiency is low
Solution Approach 1:
The voltage divider dynamically switches between different voltage division ratios (2:1, 3:1, 4:1) based on the input voltage level detected by the processor. This dynamic adjustment allows the system to optimize charging speed for different power sources while maintaining a relatively simple circuit structure using multiplexers and capacitors.
Solution Approach 2:
The system changes the voltage division ratio parameter adaptively based on the input voltage. The processor detects the input voltage level and selects the appropriate division ratio, thereby changing the electrical parameter to match the power source and maximize charging efficiency.
2Ease of manufacture
If the voltage division ratio is fixed, then the circuit is simple to manufacture, but compatibility with various power sources is poor
Solution Approach 1:
The voltage divider employs dynamic switching capability to adapt to different power sources. By using multiplexers controlled by the processor, the system can switch between different voltage division ratios to match various power source voltages, thereby achieving broad compatibility without overly complicating the manufacturing process.
Solution Approach 2:
The voltage divider is designed to perform multiple functions by supporting different voltage division ratios. This multi-functionality allows a single circuit design to work with various power sources (different voltages) while maintaining ease of manufacture through standardized components like multiplexers and capacitors.
3Productivity
If adaptive voltage division is implemented, then charging efficiency is improved, but the device complexity increases
Solution Approach 1:
The processor detects the input voltage level and uses this feedback information to determine the appropriate voltage division ratio. This feedback mechanism enables adaptive voltage division that improves charging efficiency while keeping the control logic centralized in the processor, thereby managing device complexity through intelligent control rather than complex hardware.
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
This solution reduces charging time by optimizing voltage division ratios, enhancing charging efficiency and maintaining compatibility with various power sources, thus improving battery charging speed and device portability.
Implementation Method 1
a voltage divider comprising a plurality of capacitors and a plurality of switches for switching an electrical path between each of the plurality of capacitors and the rechargeable battery
Data Source
AI summary
An electronic device including a voltage divider adaptively changing a voltage division ratio is provided. The electronic device comprises a rechargeable battery; a connector configured to connected the electronic device with an external electronic device; a voltage divider comprising a plurality of capacitors and a plurality of switches for switching an electrical path between each of the plurality of capacitors and the rechargeable battery, wherein the voltage divider is configured to provide three or more voltage division ratios; and a processor operably coupled with the voltage divider and the connector, wherein the processor is configured to: receive an indicator indicating a first voltage of a first power from the external electronic device; select a voltage division ratio from the three or more division ratios, based at least in part on the indicator; and control the plurality of switches on the basis of the selected voltage division ratio, and wherein the voltage divider is configured to: charge a rechargeable battery with a second voltage by dividing the first voltage according to the selected voltage division ratio.