Multi-Branch Wireless Charging for Higher Power and Lower Heat
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Solution Overview
Problem
Existing single-circuit wireless charging devices are limited in charging power due to constraints on current and voltage, with increasing power requirements leading to high processing and cost issues for integrated circuits.
Innovation Solution
A wireless charging system with at least two transmitting and receiving branches, each connected by electromagnetic coupling, allows for simultaneous charging paths, doubling the charging power and reducing heat, while a control module adjusts electromagnetic signal power based on feedback from the to-be-charged device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single coil is used to transmit power, then the device structure is simple, but the charging power is limited
Solution Approach 1:
The patent divides the single coil structure into multiple coils (first coil and second coil) that operate simultaneously. Each coil generates electromagnetic signals that are superimposed, creating a combined magnetic field that provides higher charging power while maintaining relatively simple device structure through modular segmentation.
2Power
If the voltage of the rectifier bridge is increased to achieve higher charging power, then the charging power increases, but the processing and costs of the integrated circuit process are highly controlled
Solution Approach 1:
Instead of increasing the voltage of a single rectifier bridge, the patent segments the power transmission into multiple parallel paths with separate rectifier bridges. Each rectifier operates at manageable voltage levels, and their outputs are combined to achieve high total power, thereby avoiding the need for high-voltage integrated circuit processing and reducing manufacturing complexity and costs.
3Power
If multiple transmitting and receiving branches are used, then the charging power is doubled, but the device complexity increases
Solution Approach 1:
The patent implements multiple transmitting and receiving branches as separate, modular units that can be independently controlled. Each branch contains its own coil and rectifier, creating independent power paths that are then combined. This segmented approach doubles the charging power while managing device complexity through modular design and independent control of each branch.
Solution Approach 2:
The patent merges multiple electromagnetic signals from different transmitting coils into a combined magnetic field, and combines the rectified outputs from multiple receiving branches into a unified power output. This merging of parallel paths achieves higher total power while the control module coordinates them to manage the overall system complexity.
4Temperature
If multiple charging paths are used, then heat is reduced, but the device complexity increases
Solution Approach 1:
The patent segments the power transmission into multiple parallel charging paths, each handling a portion of the total power load. This distribution of current across multiple paths reduces heat generation in any single component. The modular segmented structure manages device complexity by creating independent, manageable units that can be controlled separately.
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
The system significantly enhances charging power and efficiency by utilizing multiple charging paths, reducing heat and improving overall charging performance.
Implementation Method 1
Each transmitting branch is configured to generate one path of electromagnetic signal based on the input current and the input voltage and transmit the electromagnetic signal to one receiving branch of a to-be-charged device
Implementation Method 2
Each receiving branch is configured to couple to one transmitting branch of a wireless charging device to receive an electromagnetic signal transmitted by the coupled transmitting branch and configured to convert the received electromagnetic signal into a charging voltage and a charging current
Data Source
AI summary
A to-be-charged device includes at least two receiving branches, a charging control module, and a battery. Each receiving branch is separately connected to the charging control module and the battery. Each receiving branch is respectively coupled to a transmitting branch in a wireless charging apparatus, an electromagnetic signal transmitted by the coupled transmitting branch is received, and the received electromagnetic signal is converted into charging voltage and charging current of the battery of said device. The charging control module generates, according to at least one of the charging voltage of the battery, the charging current of the battery, the voltage of each receiving branch, and the current of each receiving branch, feedback information instructing the wireless charging apparatus to adjust the transmitted power of the transmitting branch, and feeds back to the wireless charging apparatus.