Wireless Charging Step-Down Circuit for Heat and Loss Reduction
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Solution Overview
Problem
Conventional wireless charging methods suffer from low efficiency, leading to heat accumulation and design challenges in devices due to high energy loss and heat dissipation issues, particularly in compact mobile terminals.
Innovation Solution
The implementation of a device-to-be-charged with a wireless receiving circuit, a charging management circuit, and a step-down circuit that separates the step-down function to reduce heat generation by using a charge pump with high step-down conversion efficiency, allowing the charging management circuit to perform constant voltage and current control within a smaller voltage range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional wireless charging is used, then wireless charging function is provided, but charging efficiency is low and heat accumulation occurs
Solution Approach 1:
The patent segments the voltage conversion function by introducing a dedicated step-down circuit (charge pump) separate from the charging management circuit. This division allows the charging management circuit to focus on constant voltage and current control while the step-down circuit handles voltage reduction, improving overall charging efficiency and reducing heat accumulation in each component.
Solution Approach 2:
The step-down circuit acts as an intermediary component between the wireless receiving circuit and the battery. It receives high voltage from the wireless receiving circuit, converts it to lower voltage, and then provides it to the charging management circuit for battery charging. This intermediary function reduces the voltage conversion burden on the charging management circuit and improves efficiency.
2Ease of operation
If voltage conversion is performed in the charging management circuit, then charging control is achieved, but heat generation increases due to large voltage range conversion
Solution Approach 1:
The patent divides the voltage conversion task into two stages: first, the step-down circuit converts high voltage to intermediate voltage; second, the charging management circuit converts intermediate voltage to battery charging voltage. This segmentation reduces the voltage conversion range for each circuit, thereby reducing heat generation while maintaining charging control capability.
Solution Approach 2:
The patent changes the voltage parameter progression by introducing an intermediate voltage stage. Instead of direct high-to-low voltage conversion, the system uses high→intermediate→battery voltage conversion, reducing the voltage difference and power loss at each conversion stage, thus reducing heat generation.
3Productivity
If high power wireless charging is used, then charging speed is improved, but energy loss increases leading to heat dissipation issues
Solution Approach 1:
The step-down circuit serves as an intermediary that efficiently converts high voltage to lower voltage before battery charging. This intermediate conversion stage reduces energy loss during voltage transformation, allowing high power wireless charging to achieve faster charging speed while minimizing energy loss and heat dissipation.
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 configuration reduces heat generation and improves charging efficiency by minimizing energy loss during step-down conversion, enhancing the safety and performance of wireless charging in compact devices.
Implementation Method 1
separates the step-down function to reduce heat generation by using a charge pump with high step-down conversion efficiency
Implementation Method 2
a wireless receiving circuit, configured to receive a wireless charging signal to charge a battery
Data Source
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AI summary
Provided are a device to-be-charged and a charging control method. The device to-be-charged (230) includes a wireless receiving circuit (232), a charging management circuit (234), and a step-down circuit (236). The wireless receiving circuit is configured to receive a wireless charging signal to charge a battery. The charging management circuit is configured to perform constant voltage control and/or constant current control on charging of the battery (238). The step-down circuit is configured to decrease an output voltage of the wireless receiving circuit or an output voltage of the charging management circuit. In the above technical solution, by introducing the step-down circuit, a step-down function of the charging management circuit and a constant voltage control and/or constant current control function of the charging management circuit can be separated to some extent, which can reduce the amount of heat generated by the charging management circuit.