Battery Charging Power Control for User-Contact Heat Management
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Solution Overview
Problem
Electronic devices generate excessive heat during charging, particularly when coupled with high-power charging devices, leading to discomfort and potential low-temperature burns for users due to skin contact, and can degrade device performance if heat control is not optimized for user interaction.
Innovation Solution
The electronic device incorporates a battery, charging circuit, multiple temperature sensors, and a processor to measure and adaptively control charging power based on user contact state and heat state, ensuring both active operation performance and stable charging by minimizing performance limitations caused by heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-power charging is used to increase charging speed, then charging power is improved, but heat generation increases causing discomfort and potential low-temperature burns
Solution Approach 1:
The patent implements dynamic heat control by continuously monitoring temperature through multiple sensors and adaptively adjusting charging power in real-time. The system transitions from static fixed-power charging to dynamic variable-power charging, modifying charging parameters based on actual temperature conditions to prevent overheating while maintaining optimal charging speed
Solution Approach 2:
The system changes charging parameters (power level, current, voltage) based on temperature conditions. When temperature exceeds thresholds, the system modifies charging parameters to reduce heat generation. This parameter adaptation allows the system to balance charging speed with thermal safety, preventing low-temperature burns while maintaining efficient charging
2Temperature
If heat control is implemented to prevent overheating, then temperature safety is improved, but charging speed and device performance may be degraded
Solution Approach 1:
The patent employs multiple temperature sensors positioned at different locations (battery interior, battery exterior, device surface) to detect temperature variations in specific regions. This localized temperature monitoring enables precise heat control that targets only overheated areas, allowing charging to continue at high speed in cooler regions while applying thermal management only where necessary
Solution Approach 2:
The system applies heat control selectively rather than uniformly reducing power throughout. By using partial action (controlling heat only in specific regions or under specific conditions), the system maintains high charging speed in safe temperature zones while applying thermal management only when and where temperature thresholds are exceeded, thus preserving overall charging performance
3Measurement precision
If multiple temperature sensors are deployed to improve heat detection accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides temperature monitoring into multiple independent sensor units positioned at different critical locations (inside battery, outside battery, on device surface). Each sensor independently monitors its local temperature zone, and the system integrates these segmented measurements to achieve comprehensive temperature awareness. This segmentation approach improves measurement precision without requiring a single complex sensor system
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
Adaptive heat control during charging prevents or reduces low-temperature burns and maintains device performance by adjusting charging power according to user contact and heat conditions, ensuring safe and efficient operation.
Implementation Method 1
a plurality of temperature sensors disposed respectively at different positions
Implementation Method 2
heat may be generated during charging
Data Source
AI summary
An electronic device may include a battery, a charging circuit, at least one sensor, a plurality of temperature sensors disposed respectively at different positions, at least one processor operatively coupled to the battery, the charging circuit, the at least one sensor, or the plurality of temperature sensors, and memory. The memory storing instructions which are configured to, when executed, cause the electronic device to, measure temperature values at intervals of a predefined period using the plurality of temperature sensors during charging, identify a heat state based on at least in part of the measured temperature values, identify a user contact state using the at least one sensor, and control charging power for the battery through the charging circuit based on the heat state and the user contact state. Various other embodiments are also available.