Battery Charging Current Control for Internal Temperature Spikes
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Solution Overview
Problem
Charging a battery can lead to excessive internal temperature increases, causing the electronic device to overheat and potentially burn the user, while existing thermal control methods prolong charging time by frequently entering and exiting thermal control modes.
Innovation Solution
An electronic device equipped with a temperature sensor and processor that dynamically adjusts the charging current based on internal temperature, transitioning between normal, thermal control, and completion modes to minimize thermal control mode entries and optimize charging time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal control operation is performed frequently to suppress internal temperature increase, then user safety is improved, but charging time increases
Solution Approach 1:
The processor predicts future temperature increases based on current charging patterns and thermal characteristics before the temperature actually reaches dangerous levels. This preliminary prediction allows the system to prepare thermal control measures in advance, preventing excessive temperature rises without requiring frequent reactive interventions that would extend charging time.
Solution Approach 2:
The thermal control operation dynamically adjusts the charging current based on real-time temperature monitoring and prediction results. The system transitions between different charging modes (normal charging, thermal control, and completion modes) with optimized switching criteria, allowing flexible adaptation to changing thermal conditions while minimizing disruptions to the charging process.
2Temperature
If charging current is reduced to perform thermal control mode, then internal temperature increase is suppressed, but charging speed decreases
Solution Approach 1:
The system implements periodic thermal control operations rather than continuous current reduction. By monitoring temperature at specific intervals and applying thermal control only when necessary, the system maintains higher charging speeds during safe temperature periods while still effectively managing temperature peaks, thus balancing thermal control with charging efficiency.
Solution Approach 2:
The processor dynamically changes charging parameters (current levels) based on predicted temperature trajectories and device thermal characteristics. By optimizing the magnitude and duration of current reductions, the system achieves effective temperature suppression with minimal impact on overall charging speed, adapting parameters in real-time to thermal conditions.
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 allows for quick battery charging by reducing the frequency of thermal control mode activations, thereby minimizing overheating risks and reducing overall charging time.
Implementation Method 1
A temperature sensor included in the electronic device may detect an internal temperature of the electronic device
Implementation Method 2
An electronic device may use constant current (CC) and constant voltage (CV) charging profiles when charging a battery
Data Source
AI summary
An electronic device may include a power management circuit (PMC) configured to charge a battery using a power signal, a processor connected to the PMC, and a memory connected to the processor. The memory may store instructions that, when executed, cause the processor to identify that an internal temperature of the electronic device increases to a first temperature while a current power signal value is a first charging current, configure the current power signal value to a thermal control current lower than the first charging current as the internal temperature increases to the first temperature, identify that the internal temperature decreases to a second temperature while the current power signal value is the thermal control current, and configure the current power signal value to a second charging current lower than the first charging current but higher than the thermal control current as the internal temperature decreases to the second temperature.