Load Current Control Device for Mobile Battery Voltage Stability
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Solution Overview
Problem
Mobile devices face challenges in maintaining battery voltage stability when multiple functions are integrated, leading to potential system shutdowns due to instantaneous high load currents, which existing battery power management techniques fail to adequately address.
Innovation Solution
A method and device for controlling load current by monitoring battery voltage gradients, adjusting load current based on positive or negative gradients, and performing battery voltage control operations within predetermined threshold values to prevent sharp voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If loads instantaneously use a large load current to perform various functions, then the functionality and performance of the mobile device is improved, but the battery voltage experiences a sharp decrease leading to system shutdown
Solution Approach 1:
The control device begins a battery voltage control operation when the battery voltage becomes lower than a first threshold value, proactively adjusting the load current before the voltage drops to a critical level that would cause system shutdown. This preliminary action prevents the sharp voltage decrease while allowing loads to use large current when needed.
Solution Approach 2:
The control device continuously monitors the battery voltage and determines whether the gradient is positive or negative at intervals. Based on this feedback, it dynamically adjusts the load current - decreasing current when voltage gradient is negative and maintaining current when gradient is positive - thereby stabilizing battery voltage while preserving load functionality.
2Reliability
If the battery capacity is increased to provide stable voltage under high load, then the battery voltage stability is improved, but the mobile device size increases
Solution Approach 1:
Instead of increasing battery capacity, the control device changes the operational parameters by monitoring battery voltage gradients and dynamically adjusting load current. This parameter-based control achieves voltage stability without requiring a larger battery, thereby maintaining compact device size.
Solution Approach 2:
The patent replaces the mechanical solution of increasing battery physical capacity with an electronic control system that manages load current through gradient detection. This substitution achieves the same voltage stability goal without increasing device volume.
3Reliability
If the load current is continuously decreased to prevent voltage drop, then the battery voltage stability is improved, but the operational performance and productivity of the device deteriorates
Solution Approach 1:
The control device dynamically adjusts load current based on real-time battery voltage gradient conditions rather than continuously decreasing it. When the voltage gradient is positive, the load current is maintained at its required level for optimal performance. When the gradient becomes negative, the current is decreased to prevent voltage drop. This dynamic approach preserves productivity while ensuring voltage stability.
Data Source
AI summary
A method of controlling a load current is provided. By the method, a battery voltage control operation is begun when a battery voltage becomes lower than a first threshold value, whether a gradient of the battery voltage is a positive gradient or a negative gradient is determined at an interval of a reference or, alternatively, predetermined control time, the load current is controlled based on the gradient of the battery voltage at an interval of the reference or, alternatively, predetermined control time, and the battery voltage control operation is finished when the battery voltage becomes higher than a second threshold value.