Dual-Battery Charging Circuits for Stable Voltage Distribution
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Solution Overview
Problem
Existing electronic devices with multiple batteries face challenges in efficiently charging and managing power distribution between batteries, leading to inefficiencies and potential damage due to uneven voltage application.
Innovation Solution
The electronic device includes a first and second battery, each with a dedicated charging circuit, and a processor that identifies the required voltage for each battery, requesting an input voltage twice that of the first voltage from an external power source, and controls the charging circuits to supply the appropriate voltages to the batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single charging circuit is used for multiple batteries, then device complexity is reduced, but power distribution efficiency deteriorates and voltage management becomes problematic
Solution Approach 1:
The charging system is segmented into multiple independent charging circuits, with each circuit dedicated to charging a specific battery. This segmentation allows each circuit to independently manage voltage and current for its assigned battery, eliminating the power distribution inefficiencies that arise from using a single shared charging circuit for multiple batteries.
2Speed
If higher voltage is applied to charge batteries faster, then charging speed increases, but battery damage risk increases due to uneven voltage application
Solution Approach 1:
Each charging circuit is configured with specific voltage and current parameters tailored to the requirements of its assigned battery. This local quality approach ensures that each battery receives the optimal voltage for fast charging without exceeding its safety thresholds, preventing the uneven voltage application that could cause battery damage while still achieving high charging speeds.
3Stability of the object's composition
If multiple batteries are charged simultaneously from a single power source, then power supply stability improves, but power loss increases due to inefficient distribution
Solution Approach 1:
The system requests a high input voltage (e.g., 20V) from the external power source in advance, which is then distributed by dedicated charging circuits to multiple batteries at different voltage levels (e.g., 4.4V, 3.7V, 3.0V). This preliminary action of obtaining high-voltage power once and then efficiently distributing it through dedicated circuits reduces power loss compared to having each battery draw power independently, while maintaining stable power supply to all batteries simultaneously.
Data Source
AI summary
An electronic device according to one embodiment may comprise a first battery, a second battery, a first charging circuit configured to provide power of a first voltage to the first battery, a second charging circuit configured to provide power of a second voltage to the second battery, a first limiter disposed between the first battery and the second charging circuit, and a processor. The processor according to one embodiment can be configured to identify the first voltage to be applied to the first battery, request, on the basis of the first voltage, from an external power source, power of an input voltage corresponding to twice the first voltage, control, on the basis that the input voltage corresponding to twice the first voltage provided from the external power source is applied to the first charging circuit, the first charging circuit such that power of the first voltage is supplied to the first battery, and control, on the basis that the input voltage corresponding to twice the first voltage provided from the external power source is applied to the second charging circuit, the second charging circuit such that power of the second voltage is supplied to the second battery.