Serial-Parallel Conversion Circuit for Dual Battery Reverse Charging
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Solution Overview
Problem
Electronic devices with folding screens face challenges in rapid charging due to the limitations of existing boost circuits, which result in long charging times and increased design complexity when trying to support high-power charging.
Innovation Solution
The implementation of a serial-parallel conversion circuit that allows two batteries to be connected in parallel for power supply and in series for reverse charging, doubling the voltage and eliminating the need for an additional boost circuit, thereby simplifying the device design and enhancing charging power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a boost circuit is added to support high-power charging, then charging power is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of the boost circuit and battery management into a single integrated circuit. This integration eliminates the need for separate boost components while maintaining high-power charging capability, thus improving charging power without increasing overall device complexity.
Solution Approach 2:
The integrated circuit performs multiple functions including voltage boosting, battery charging management, and power distribution. By making the circuit universal and multi-functional, the patent avoids adding dedicated boost circuitry while still achieving high-power charging support.
2Productivity
If a boost circuit is added to support high-power charging, then charging speed is improved, but design complexity increases
Solution Approach 1:
The patent combines the boost functionality with the existing battery management circuit, eliminating the need for separate boost components. This integration achieves fast charging capability while avoiding the design complexity that would result from adding a standalone boost circuit.
Solution Approach 2:
The integrated circuit dynamically adjusts voltage and current parameters based on charging conditions, enabling fast charging without requiring a complex fixed-configuration boost circuit. This dynamic adaptation simplifies the overall design while maintaining high charging speed.
3Power
If two batteries are connected in parallel, then power supply capacity is improved, but voltage is limited to 3.6V-4.45V
Solution Approach 1:
The patent uses a switching mechanism that dynamically reconfigures the battery connections between parallel and series configurations. This dynamic switching allows the system to adapt voltage output based on charging requirements, overcoming the voltage limitation of parallel connections while maintaining power supply capacity.
Solution Approach 2:
The patent changes the electrical configuration parameter of the battery system from fixed parallel connection to switchable parallel-series connection. This parameter change enables voltage to vary between parallel-mode voltage (3.6V-4.45V) and series-mode voltage (doubled), thus overcoming the voltage limitation while preserving power supply capacity.
4Adaptability or versatility
If switching devices are added for serial-parallel conversion, then charging versatility is improved, but device complexity increases
Solution Approach 1:
The patent merges the switching devices into the integrated circuit that also handles battery management and power distribution. This consolidation provides charging versatility through serial-parallel conversion while minimizing the increase in overall device complexity by sharing the integrated circuit platform.
Data Source
AI summary
An electronic device includes a first battery, a second battery, and a serial-parallel conversion circuit. The serial-parallel conversion circuit is coupled to the first battery and the second battery, and is configured to, according to a control signal, couple the first battery and the second battery in series so as to reversely charge on a to-be-charged device by the first battery and the second battery, or couple the first battery and the second battery in parallel so as to supply power to the electronic device by the first battery and the second battery.