Dynamic Current Adjustment for Thermal Protection in Charging Connections
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Solution Overview
Problem
The increase in current delivery to portable devices for faster charging leads to overheating issues in connections, which can result in catastrophic failures due to the neglect of I2R heating effects and variability in cable and connector combinations from different manufacturers, lacking guaranteed safe power transfer.
Innovation Solution
A system and method that measures temperature changes in connections and adjusts current delivery based on these measurements to prevent overheating, allowing either device to monitor and adjust the current to maintain a safe operating temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current delivery is increased for faster charging, then charging speed is improved, but connection temperature increases causing overheating and potential failure
Solution Approach 1:
The patent implements a feedback mechanism where temperature sensors continuously monitor the connection temperature between devices. When the temperature exceeds a predetermined threshold, the system automatically reduces the current delivery to prevent overheating. This closed-loop control allows the system to maintain safe operating temperatures while maximizing charging speed when conditions permit, directly resolving the contradiction between charging speed and temperature control
Solution Approach 2:
The patent dynamically adjusts current delivery based on real-time temperature conditions rather than using a fixed current limit. The system can operate at high current when temperatures are low and safely reduce current when temperatures rise, creating a dynamic charging profile that adapts to thermal conditions. This dynamic approach allows the system to achieve faster charging when possible while preventing overheating, resolving the static trade-off between speed and temperature
2Power
If maximum current is delivered according to VA specifications, then power delivery capability is improved, but I2R heating effects cause catastrophic failure
Solution Approach 1:
The system uses temperature feedback to continuously monitor the actual thermal state of the connection and adjusts power delivery accordingly. When temperature rises indicating I2R heating problems, the system reduces current to prevent catastrophic failure. This feedback mechanism ensures reliable operation by preventing the connection from entering dangerous thermal states while still allowing maximum power delivery when conditions are safe
Solution Approach 2:
The patent takes preliminary anti-action by proactively reducing current delivery before catastrophic failure can occur. The temperature threshold is set to trigger current reduction in advance of dangerous conditions, preventing the I2R heating effects from reaching failure levels. This preventive approach maintains connection reliability while preserving power delivery capability within safe operating parameters
3Adaptability or versatility
If different manufacturers produce connections with varying quality, then manufacturing versatility is improved, but power transfer safety cannot be guaranteed
Solution Approach 1:
The temperature monitoring and feedback control system creates a universal safety mechanism that works regardless of which manufacturer produced the connection. The system adapts to the specific thermal characteristics of any connector-cable-device combination and adjusts current delivery accordingly. This feedback-based approach guarantees safe power transfer across all manufacturer variations by continuously monitoring actual thermal conditions rather than relying on manufacturer specifications
Solution Approach 2:
The system changes the operating parameters (current delivery) based on the actual thermal response of the specific connection being used. By measuring temperature and adjusting current in real-time, the system adapts to the unique characteristics of each manufacturer's connection design. This parameter adjustment ensures safe power transfer across diverse connector implementations while maintaining manufacturing versatility
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 effectively prevents overheating and potential failures by dynamically adjusting current delivery based on temperature thresholds, ensuring safe operation and potentially allowing higher current or power delivery to devices, especially beneficial for devices requiring rapid recharging like laptops or tablets.
Implementation Method 1
A change in temperature of the connection may be measured while the current is provided from the first device to the second device
Implementation Method 2
the increase in current causes an increase in temperature in the connections and may result in catastrophic failure... this limit neglects the fact that heating is caused by I2R effects
Data Source
AI summary
Adjusting current based on temperature. A change in temperature of a connection between a first device and a second device may be measured. The change in temperature may be performed while the first device provides current to the second device over the connection. If the change in temperature is above a threshold, the current being provided from the first device to the second device may be reduced. The change in temperature may be performed by the first device and/or the second device, e.g., by measuring the temperature of a connector of the connection.