Bi-Directional Battery Charging Circuit With Adaptive Boost Voltage
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Solution Overview
Problem
Existing battery charging systems have low charging efficiency due to fixed charging voltage, which cannot be adjusted based on charging current, especially when the preset voltage is high.
Innovation Solution
A bi-directional battery charging circuit that includes a switching circuit and a voltage control module capable of sensing charging currents and adjusting the boost output voltage based on these currents, allowing for dynamic voltage adjustment to optimize charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a preset charging voltage is used, then the charging system is simple to control, but the charging efficiency is low especially when the preset voltage is high
Solution Approach 1:
The patent implements dynamic voltage adjustment by introducing a voltage control module that modifies the preset charging voltage based on real-time charging current feedback. The control module dynamically changes the voltage parameter during charging operation, transitioning from a static preset voltage to a dynamic adjustable voltage that adapts to charging conditions, thereby improving charging efficiency while maintaining controllable complexity
Solution Approach 2:
The patent employs a feedback mechanism where the charging current is sensed and fed back to the voltage control module. This feedback loop enables the system to automatically adjust the charging voltage based on the actual charging state, creating a closed-loop control system that optimizes charging efficiency without requiring complex manual intervention
2Device complexity
If the charging voltage cannot be adjusted with charging current, then the control system is simple, but the charging efficiency is low
Solution Approach 1:
The patent changes the voltage parameter dynamically during the charging process based on charging current magnitude. The voltage control module adjusts the charging voltage parameter in response to charging current variations, enabling the system to operate at optimal voltage levels for different charging stages, thereby improving charging efficiency through parameter optimization
Solution Approach 2:
The system transitions from a static voltage control approach to a dynamic voltage adjustment mechanism. The voltage control module continuously adapts the charging voltage based on real-time charging current conditions, making the control system dynamic and responsive to changing charging requirements, which improves charging efficiency
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 enhances charging efficiency by dynamically adjusting the boost output voltage in response to charging currents, improving energy transfer between batteries and loads.
Implementation Method 1
the switching circuit is configured to work in a buck mode to convert the voltage received at the PMID terminal to the system voltage, or to work in a boost mode to convert the system voltage to a boost output voltage at the PMID terminal
Data Source
AI summary
An electric system has an input terminal to receive an input voltage, a system output terminal to provide a system voltage, and N charging units for charging N loads respectively. The electric system has an input switch coupled between the input terminal and a first terminal, a switching circuit coupled between the first terminal and the system output terminal. The switching circuit converts the a boost output voltage at the first terminal to the system voltage, or converts the system voltage to the boost output voltage. The electric system further has a voltage control module having N input terminals coupled to the N charging units respectively, the voltage control module senses N charging currents passing through the N charging units respectively, and adjusts the boost output voltage based on the N charging currents.