Wireless Charging Charge Pump Control for Fast Charging Heat Limits
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Solution Overview
Problem
Existing wireless charging technologies suffer from low efficiency, significant heating issues, and limited power output, typically only supporting low-power charging of around 10 W, which affects user experience.
Innovation Solution
A wireless charging method and apparatus that employs a voltage and current adjusting module, such as a charge pump, to step-down and raise the current of the direct current power received from a wireless charging apparatus, allowing for higher power fast charging while reducing heat generation by increasing the voltage and decreasing the current, thereby improving charging efficiency and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless charging power is increased to improve charging speed, then charging efficiency and speed are improved, but heat generation becomes very serious
Solution Approach 1:
The patent changes the voltage and current parameters dynamically during the charging process. It uses a charge pump circuit to boost the voltage from the wireless receiving module, then employs a Buck circuit to regulate the voltage while controlling the charging current. This parameter transformation allows high-power charging while managing heat generation through controlled voltage-current conversion.
Solution Approach 2:
The patent introduces intermediate conversion circuits (charge pump and Buck circuit) between the wireless receiving module and the battery. These intermediary components transform the electromagnetic energy received wirelessly into controlled direct current, enabling efficient power transfer while dissipating heat through controlled conversion processes rather than direct high-power wireless transmission.
2Temperature
If voltage is increased to reduce current and decrease heat, then heat generation is reduced, but charging efficiency decreases
Solution Approach 1:
The patent maintains continuous useful action through the charge pump and Buck circuit configuration. The charge pump continuously boosts the voltage from the receiving module, and the Buck circuit continuously regulates the voltage and current. This continuous conversion process minimizes energy loss by keeping the system in an active conversion state rather than allowing voltage drops or inefficient intermittent charging.
3Productivity
If high power wireless charging is implemented, then charging speed is improved, but the system becomes unstable and heat affects user experience
Solution Approach 1:
The patent implements feedback control through the Buck circuit, which continuously monitors the output voltage and current from the charge pump and adjusts its duty cycle accordingly. This feedback mechanism stabilizes the charging process by preventing voltage spikes and current fluctuations, ensuring reliable high-power charging while managing thermal conditions through controlled power delivery.
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 solution enables high-power wireless fast charging with reduced heat generation, enhancing user experience by increasing charging efficiency and speed while maintaining high conversion efficiency even with larger voltage differences.
Implementation Method 1
a wireless receiving module, configured to receive an electromagnetic signal transmitted by a wireless charging apparatus, and to convert the electromagnetic signal to a direct current power
Data Source
AI summary
Provided are a wireless charging method, an electronic device and a wireless charging apparatus. The method includes: monitoring a present voltage of a battery of the electronic device, after communication between a wireless charging apparatus and an electronic device is established; in response to the present voltage of the battery being greater than a preset fast charging voltage, controlling a voltage and current adjusting module of the electronic device to operate, to perform step-down and current rising on a direct current power outputted by the wireless receiving module of the electronic device and provide the direct current power after the step-down and current rising to the battery; determining an initial voltage value and sending the initial voltage value to the wireless charging apparatus, to enable the wireless charging apparatus to control a voltage of an adjustable direct current power according to the initial voltage value.