Wireless Power Receiver Temperature Control via Dynamic Power Adjustment
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Solution Overview
Problem
Wireless power receivers experience temperature rises during charging, leading to interruptions in seamless charging due to overheating, causing inconvenience as they must disconnect and reconnect with the transmitter once the temperature drops.
Innovation Solution
An electronic device with a power receiving circuitry, power converting circuitry, temperature measurement unit, and controller that adjusts the power level or stops charging if the temperature exceeds a threshold, and communicates with the transmitter to control the charging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless power receiver continues charging at high power when temperature rises, then charging speed is maintained, but temperature exceeds safe threshold causing charging interruption
Solution Approach 1:
The patent implements dynamic power adjustment by continuously monitoring temperature and adapting charging power levels accordingly. The controller dynamically reduces power from full charging mode to reduced power mode when temperature thresholds are exceeded, and seamlessly resumes full power when temperature normalizes, maintaining optimal charging speed within safe temperature boundaries
Solution Approach 2:
The system changes the power parameter based on temperature conditions. When temperature rises above the first threshold, the power parameter is adjusted from a first power level to a second reduced power level. This parameter adaptation allows the system to maintain safe operating temperatures while continuing the charging process without complete interruption
2Reliability
If the wireless power receiver stops charging when temperature exceeds threshold, then temperature safety is ensured, but charging continuity is broken requiring user intervention
Solution Approach 1:
The patent maintains continuous charging action by implementing a seamless power adjustment rather than complete stoppage. The controller transitions between full power mode and reduced power mode based on temperature, ensuring the charging process continues uninterrupted. When temperature drops below the second threshold, full power charging automatically resumes without requiring user disconnection or reconnection actions
Solution Approach 2:
The system employs continuous temperature feedback monitoring to control charging power. The controller receives real-time temperature data and automatically adjusts power delivery accordingly. This closed-loop feedback mechanism ensures temperature safety while maintaining charging continuity, as the system proactively reduces power before dangerous temperatures are reached and resumes full power when safe
3Ease of operation
If contact terminals are exposed for charging connection, then charging functionality is achieved, but terminals are contaminated by dirt and moisture
Solution Approach 1:
The patent replaces the mechanical contact-based charging system with a wireless power transmission system. Instead of exposing physical contact terminals that are susceptible to dirt and moisture contamination, the system uses electromagnetic field-based wireless charging. This substitution eliminates the harmful contamination issue while maintaining charging accessibility and ease of 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
Prevents temperature-related interruptions by dynamically managing power levels and communicating with the transmitter, ensuring seamless and safe wireless charging.
Implementation Method 1
a power converting circuitry configured to convert the received power in an alternating current (AC) form into a direct current (DC) form
Implementation Method 2
a temperature measurement unit configured to measure a temperature of a point in the electronic device
Data Source
AI summary
An apparatus and a method for are provided for a wireless power receiver. The method includes receiving power from a wireless power transmitter; converting the power in an alternating current (AC) form into a direct current (DC) form and providing the converted power to a battery of the electronic device; measuring a temperature of a point in the wireless power receiver during reception of the wireless power; maintaining an amount of the converted power at a first level if the temperature is lower than a first temperature; decreasing the amount of the converted power to a second level which is lower than the first level if the amount of the converted power is at the first level and the temperature is higher than or equal to the first temperature; stopping providing the converted power to the battery if the temperature is higher than a second temperature; and transmitting, to the wireless power transmitter, a signal including status information of the wireless power receiver device and control information to control the wireless power transmitter.