Wireless Charging Standby Control During Wired Battery Charging
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Solution Overview
Problem
Electronic devices with both wired and wireless charging capabilities face issues such as excessive heat generation and reduced charging efficiency when both charging methods are used simultaneously, leading to potential damage from increased rectification voltage and miscommunication with wireless chargers.
Innovation Solution
The electronic device identifies simultaneous wired and wireless charging connections, enters a wireless charging standby state by reducing the output voltage of the wireless charging IC, and communicates this state to the wireless charger using the antenna module to prevent power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electronic device maintains wireless charging connection while performing wired charging, then charging efficiency is improved, but heat generation increases excessively
Solution Approach 1:
The wireless charging IC dynamically adjusts its operation state based on charging conditions. When wired charging is detected, the system transitions the wireless charging IC to a standby state with minimal power consumption, while maintaining the ability to quickly resume wireless charging when needed. This dynamic state adjustment resolves the contradiction by allowing efficient charging through wired connection while preventing excessive heat generation from simultaneous wireless charging operation.
Solution Approach 2:
The system changes the operational parameters of the wireless charging IC by adjusting the output voltage to a standby level when wired charging is active. This parameter change reduces the power consumption and heat generation of the wireless charging components while maintaining the charging connection, thus resolving the contradiction between charging efficiency and heat generation.
2Temperature
If the wireless charging IC is turned off to reduce heat generation, then heat generation is reduced, but the wireless charger cannot recognize the electronic device
Solution Approach 1:
Instead of completely turning off the wireless charging IC, the system applies partial action by reducing the output voltage to a standby level and maintaining minimal operation. This partial operation is sufficient to maintain device recognition and communication with the wireless charger while significantly reducing heat generation and power consumption, thus resolving the contradiction between heat reduction and reliable recognition.
Solution Approach 2:
The wireless charging IC maintains a self-service standby state where it consumes minimal power but remains functional for communication and recognition purposes. This self-service mode allows the IC to continue providing basic functions (device recognition, communication) without full power operation, resolving the contradiction between reduced heat generation and maintained reliability.
3Temperature
If the output voltage of the wireless charging IC is reduced to standby state, then heat generation is reduced, but AC signal may still flow through the antenna module
Solution Approach 1:
The system introduces an intermediary control mechanism (the processor) that manages the wireless charging IC's operation. The processor monitors the charging state and controls the output voltage of the wireless charging IC, acting as an intermediary between the charging demand and the physical components. This intermediary control allows precise management of AC signal flow while maintaining reduced heat generation through controlled standby operation.
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 reduces heat generation and maintains efficient charging by minimizing AC signal induction, preventing damage to the wireless charging IC and ensuring proper communication with external devices.
Implementation Method 1
an antenna module (297) configured to receive a first power for wireless charging
Implementation Method 2
an alternating current (AC) signal may flow into the wireless charging IC through an antenna module even when the wireless charging is in the standby state, and the introduced AC signal may excessively increase a rectification voltage Vrect by the rectification circuit in the wireless charging IC. Further, when the rectification voltage Vrect is excessively increased, heat generation may occur in the wireless charging IC
Data Source
AI summary
A method for controlling wired/wireless charging in an electronic device is provided. The method includes: based on identifying a wireless charging connection with a first external device and a wired charging connection with a second external device, charging a battery of the electronic device by using a power provided through a wired charging circuitry of the electronic device and operate a wireless charging circuitry of the electronic device in a wireless charging standby state; and in the wireless charging standby state, providing information on the wireless charging standby state to the first external device using an antenna module of the electronic device, to cause the first external device not to transmit a wireless power.