Wireless Power Receiver CPU Stop Mode for Fast Battery Charging
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Solution Overview
Problem
Current wireless power transfer systems, such as radio systems, have limited power transfer capacity and distance, making it inefficient to charge devices with high power consumption, like CPUs, while simultaneously charging batteries.
Innovation Solution
A power-receiving apparatus with a power supply unit and wireless communication unit that includes a rechargeable battery, a power-receiving unit, and a power controller. The power controller manages power distribution, stopping power supply to the CPU during wireless charging to conserve energy and efficiently charge the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a CPU that consumes relatively high amounts of power is running while a rechargeable battery is being charged using a radio system, then the device can perform operations, but the rechargeable battery is not charged quickly due to limited power transfer capacity
Solution Approach 1:
The system dynamically switches between two operational modes: a first operation mode where the CPU operates normally and the battery is charged, and a second operation mode where the CPU is stopped to enable faster battery charging. This dynamic adjustment of operational states allows the system to optimize charging speed based on power availability from the limited-capacity radio system.
Solution Approach 2:
The system changes the operational parameter of the CPU from active to stopped state during the second operation mode. This parameter change reduces power consumption significantly, allowing the limited power transfer capacity of the radio system to be dedicated entirely to battery charging, thereby improving charging speed.
2Productivity
If power is supplied to both the CPU and the rechargeable battery simultaneously through a radio system with limited power transfer capacity, then the device can operate, but the overall charging efficiency is reduced
Solution Approach 1:
The system dynamically transitions between operational modes to optimize power distribution. In the first mode, both CPU and battery receive power simultaneously. In the second mode, power is reallocated exclusively to the battery by stopping the CPU, thereby improving charging efficiency when the radio system's power transfer capacity is insufficient to handle both loads simultaneously.
3Ease of operation
If the radio system is used for wireless power transfer, then wireless charging is enabled, but the power transfer distance and power transfer capacity are limited
Solution Approach 1:
The system dynamically adjusts its operational state based on the power received from the radio system. When power transfer capacity is sufficient, the CPU operates normally. When power transfer capacity is limited, the system switches to a low-power mode or stops the CPU to maximize battery charging efficiency, thereby optimizing the use of wireless power transfer capability despite its limitations.
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 allows for efficient battery charging even with high power consumption devices, reducing overall power consumption during wireless charging and enabling parallel charging of multiple devices with varying battery capacities.
Implementation Method 1
a power-receiving unit that receives power transferred from a power-transfer apparatus by using a radio system
Data Source
AI summary
A power-receiving apparatus includes a power supply unit and a wireless communication unit. The power supply unit includes a first rechargeable battery that accumulates power, a power-receiving unit that receives power transferred from a power-transfer apparatus by using a radio system, and a power controller that, in a wireless charging mode, performs control of charging of the first rechargeable battery in accordance with the power received by the power-receiving unit and stops supply of the power to a main controller. The wireless charging mode is set for wirelessly charging the first rechargeable battery as an operation mode. The main controller performs control of predetermined operations of the power-receiving apparatus. The wireless communication unit operates when receiving supply of the power from the power supply unit and wirelessly communicates with the power-transfer apparatus.