Wireless Charging System with Feedback Power Control
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Solution Overview
Problem
Conventional wireless charging systems face inefficiencies and heat-related issues due to the need for conversion circuits, which can lead to energy loss, overheating, and potential safety risks such as battery explosion.
Innovation Solution
A wireless charging system that adjusts transmission power based on feedback from the device being charged, allowing for direct charging and reducing the need for conversion circuits by using wireless communication to match the output voltage and current with the battery's requirements, thereby minimizing energy loss and heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional wireless charging is used with conversion circuits, then wireless charging functionality is achieved, but charging efficiency deteriorates and heat generation increases
Solution Approach 1:
The patent removes the conversion circuit from the wireless charging system. By using a wireless charging device that directly outputs voltage and current matching the battery's charging requirements through wireless communication negotiation, the conversion circuit is extracted and eliminated, thereby reducing energy loss and heat generation while maintaining charging functionality
Solution Approach 2:
The patent implements a feedback mechanism where the device to be charged communicates its charging requirements (voltage and current) to the wireless charging device through wireless communication. The wireless charging device adjusts its output based on this feedback, eliminating the need for conversion circuits and improving charging efficiency
2Reliability
If conversion circuits are used in wireless charging, then voltage and current conversion is achieved, but heat accumulation increases and safety risks arise
Solution Approach 1:
The patent extracts and removes the conversion circuit that causes heat accumulation. By using direct wireless power transmission with matched output parameters, the source of heat generation is eliminated, improving safety and reducing temperature rise
Solution Approach 2:
The wireless charging device autonomously negotiates and outputs the exact voltage and current required by the battery through wireless communication. This self-service approach eliminates the need for conversion circuits that generate heat, thereby improving safety and reducing temperature accumulation
3Ease of operation
If wired charging is used, then charging reliability is maintained, but operational complexity increases due to cable requirements
Solution Approach 1:
The patent replaces the mechanical cable connection system with a wireless electromagnetic field-based power transmission system. The wireless charging device establishes an electromagnetic field that directly transfers power to the device to be charged, eliminating the need for physical cable connections while maintaining charging reliability through protocol-based negotiation and control
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 approach enhances charging efficiency, reduces heat accumulation, and improves safety by ensuring the output voltage and current are optimally matched to the battery's needs, preventing overheating and potential explosions.
Implementation Method 1
a wireless transmission circuit configured to transmit an electromagnetic signal to conduct wireless charging on the device to be charged
Implementation Method 2
a wireless reception circuit configured to receive the electromagnetic signal and convert the electromagnetic signal into output voltage and output current of the wireless reception circuit
Data Source
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AI summary
A wireless charging system, a wireless charging device, a wireless charging method, and a device to be charged are provided. The wireless charging system includes a wireless charging device and a device to be charged. The wireless charging device includes a wireless transmission circuit, a first communication control circuit, an external interface, and a wireless data transmission circuit. The device to be charged includes a battery, a wireless reception circuit, a first charging channel, a detecting circuit, and a second communication control circuit. The second communication control circuit is configured to conduct wireless communication with the first communication control circuit according to at least one of output voltage and output current of the wireless reception circuit detected by the detecting circuit, whereby the first communication control circuit adjusts transmission power of the wireless transmission circuit to make at least one of the output voltage and the output current of the wireless reception circuit match a present charging stage of the battery.