Wireless Power Sensing Circuit for Ping-Based Charging Mode Control
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Solution Overview
Problem
Existing wireless charging systems lack efficient power mode management and accurate power sensing mechanisms, leading to inefficiencies in charging speed and user experience due to temperature increases and battery overcharging.
Innovation Solution
A wireless power sensing circuit and electronic device that operate in multiple power modes, including a power charging mode, a power hold mode, and a power cutoff mode, utilizing a power receiving circuit with a power sensing circuit that generates a ping flag signal and alternates between high and low levels to manage power transmission based on a counting value, allowing for adaptive power mode switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless power is continuously provided at high power, then charging speed is improved, but temperature increases and battery overcharging occurs
Solution Approach 1:
The patent implements periodic power transmission by alternating between power on and off states in the power hold mode. The power receiving circuit periodically receives power from the power transmitting device, creating a pulsed charging pattern that reduces cumulative heat generation while maintaining charging progress. This periodic action allows thermal dissipation between power cycles, preventing excessive temperature buildup.
Solution Approach 2:
The patent dynamically adjusts power transmission parameters based on real-time conditions. The processor monitors charging state and automatically transitions between different power modes (power charging mode, power hold mode, power cutoff mode) based on battery status and temperature conditions. This dynamic adaptation allows the system to optimize charging speed while preventing harmful overheating through automatic mode switching.
2Productivity
If power is continuously transmitted, then charging efficiency is improved, but power management control and safety are reduced
Solution Approach 1:
The patent implements a feedback mechanism where the power receiving circuit generates a ping flag signal in response to power reception, and the processor counts transitions of this signal to determine power mode. The system continuously monitors charging parameters and provides feedback to the processor, which adjusts power transmission accordingly. This closed-loop control ensures both high charging efficiency and reliable power management by automatically responding to changing charging conditions.
Solution Approach 2:
The patent segments the charging process into distinct power modes (power charging mode, power hold mode, power cutoff mode) with specific functions. Each mode represents a segmented phase of the overall charging process, allowing independent optimization and control of different charging aspects. This segmentation enables precise power management while maintaining overall charging efficiency through coordinated mode transitions.
3Device complexity
If simple power reception is implemented, then device complexity is reduced, but power mode management and sensing accuracy are insufficient
Solution Approach 1:
The patent implements a multi-functional power receiving circuit that performs multiple functions within a unified structure. The same circuit components handle power reception, generate ping flag signals for sensing, and provide feedback for mode control. This universal design achieves accurate power sensing and sophisticated mode management without proportionally increasing device complexity, as the same hardware serves multiple purposes in the power management system.
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 enables efficient power management by reducing charging speed when necessary, preventing overheating, and ensuring accurate power reception and cutoff, thereby enhancing user experience and device safety.
Implementation Method 1
a power converting circuit configured to rectify the received power and generate a rectified voltage
Implementation Method 2
a battery of the power transmitting device may be charged by electromagnetic induction or a resonance phenomenon between a transmitting coil of the power transmitting device and a receiving coil of the power receiving device
Implementation Method 3
a battery of the power transmitting device may be charged by electromagnetic induction or a resonance phenomenon between a transmitting coil of the power transmitting device and a receiving coil of the power receiving device
Data Source
AI summary
An electronic device configured to operate in a plurality of power modes includes a power receiving circuit receiving wireless power from an power transmitting device; and a processor configured to control an operation of the electronic device, wherein the plurality of power modes include a power charging mode in which the wireless power is continuously provided, a power hold mode in which a state where the wireless power is provided and a state where the wireless power is cut off are periodically repeated in a ping period, and a power cutoff mode in which the wireless power is cut off, wherein the power receiving circuit generates a ping flag signal alternates between a high level and a low level with the ping period in the power hold mode, and changes the power mode based on a counting value obtained by counting particular level sections of the ping flag signal.