Multi-Battery Charging Circuit for Adapter-Flexible Power Switching
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Solution Overview
Problem
Existing electronic devices with multiple batteries face inefficiencies in charging and discharging due to limited power storage, high discharge voltages, energy consumption losses, and the need for flexible charging settings to meet fast charging requirements and adapt to various charging adapters.
Innovation Solution
A charging system that switches the connection relationship between batteries using transistors and switches to enable serial or parallel connections, allowing for flexible charging and discharging, and adapts to different external charging adapters, while managing current flow direction and preventing voltage differences between batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If batteries are charged in parallel, then charging flexibility is improved, but storage power of each battery is limited due to charge-conducting wire restrictions
Solution Approach 1:
The patent implements dynamic switching between series and parallel connection modes for multiple batteries through a control circuit. This allows the system to adapt the connection configuration based on charging requirements, enabling both flexible charging and full utilization of battery storage capacity without being restricted by charge-conducting wire limitations in a fixed parallel configuration.
2Power
If batteries are discharged in series, then power output is increased, but discharge voltages exceed 5V requiring additional step-down modules that consume energy
Solution Approach 1:
The control circuit dynamically switches between series and parallel connection modes based on power requirements. When high power output is needed, series connection is activated; when lower power suffices, parallel connection is used, eliminating the need for continuous step-down conversion and reducing energy consumption losses from unnecessary voltage regulation.
Solution Approach 2:
The system changes the electrical connection parameters (series/parallel configuration) of the batteries based on operational requirements. This parameter switching allows the system to optimize between power output and energy efficiency by selecting the appropriate connection mode rather than being locked into a single configuration that always requires voltage step-down.
3Device complexity
If a fixed connection manner is used for batteries, then device complexity is reduced, but charging speed and efficiency cannot be optimized for fast charging requirements
Solution Approach 1:
The patent introduces a control circuit that dynamically switches between series and parallel connection modes, adding moderate complexity to enable optimized charging speeds. The switching capability allows the system to achieve fast charging when needed while maintaining relatively simple overall structure, balancing device complexity with charging performance requirements.
Data Source
AI summary
A charging system includes a voltage conversion circuit, a control circuit, an input end Vin and an output end Vout. The voltage conversion circuit and the control circuit are connected to M batteries, the input end Vin is connected to an external power supply, and the output end Vout is connected to a load. The control circuit is configured to switch a connection relationship between the M batteries, to connect at least one of the M batteries to the voltage conversion circuit, where the connection relationship includes at least one of a serial connection or a parallel connection. The voltage conversion circuit is connected to the input end Vin and the output end Vout; is configured to receive power from the external power supply through the input end Vin, and charge the at least one battery; and is further configured to supply power to the load through the output end Vout.