Series Battery Charging via Voltage Conversion
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Solution Overview
Problem
Existing mobile terminal charging technologies generate excessive heat during fast charging, necessitating a solution to reduce heat generation while maintaining charging speed.
Innovation Solution
A charging method that converts received voltage to achieve a converted charging voltage for charging multiple cells in series, reducing charging current and heat while increasing charging voltage, utilizing a charge pump and switching between charging modes to optimize voltage and current for efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fast charging is implemented with single cell structure, then charging speed is improved, but heat generation becomes more serious
Solution Approach 1:
The battery system is divided into multiple cells (first cell and second cell) connected in series, allowing the charging process to be distributed across multiple components. This segmentation reduces the current burden on each individual cell while maintaining the overall charging power, thereby reducing heat generation in each cell while achieving fast charging capability.
2Productivity
If charging voltage is increased for fast charging, then charging speed is improved, but heat generation increases
Solution Approach 1:
The system dynamically switches between different charging modes (first charging mode and second charging mode) based on real-time conditions. The switching controller adjusts the charging configuration dynamically, enabling the system to optimize the balance between charging speed and heat generation by adapting to changing battery states and thermal conditions.
3Temperature
If multiple cells are charged in series with converted voltage, then heat generation is reduced, but device complexity increases
Solution Approach 1:
A voltage conversion circuit is introduced as an intermediary component to convert the input charging voltage to the appropriate level for series charging of multiple cells. This intermediary device enables the system to achieve reduced heat generation through series charging while managing the voltage transformation requirements, thereby balancing thermal performance with system complexity.
Solution Approach 2:
The system uses electronic voltage conversion and switching control to replace what would otherwise require complex mechanical or manual voltage regulation mechanisms. The switching controller and voltage conversion circuit provide automated, precise control of the charging process, reducing the need for complex mechanical adjustments or manual intervention.
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 method effectively reduces heat generation during charging while achieving fast charging by adjusting voltage and current, improving charging speed and efficiency compared to traditional single cell charging systems.
Implementation Method 1
a received charging voltage is converted to obtain a converted charging voltage
Data Source
Figure 1~3
Figure 4
AI summary
Embodiments of the present disclosure provide a charging method for multiple cells. The method includes: converting a received charging voltage to obtain a converted charging voltage; and charging multiple cells connected in series with the converted charging voltage. The technical solution according to embodiments of the present disclosure reduces the charging current and the heat generated by a terminal during the charging process. Meanwhile, when the charging current remains the same, the charging voltage is increased, achieving fast charging.