Dual-Battery Charging Circuit With Threshold Current Balancing
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Solution Overview
Problem
Conventional electronic devices with multiple batteries face challenges in efficiently managing power distribution between batteries, leading to potential overheating and reduced charging efficiency due to excessive current supply.
Innovation Solution
An electronic device comprising a first battery, a second battery, a charging circuit, and a processor that controls the charging circuit to generate a current summing the threshold currents of both batteries. The processor identifies when the second current exceeds its threshold and reduces its magnitude, thereby optimizing power distribution and reducing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the charging circuit supplies power to multiple batteries simultaneously through separate paths, then the power distribution efficiency is improved, but the current management complexity increases leading to potential overheating
Solution Approach 1:
The processor continuously monitors the current supplied to each battery through separate paths and dynamically adjusts the charging parameters. When the current to a battery exceeds its threshold, the processor reduces the voltage or current to that specific battery, preventing overheating while maintaining efficient charging of other batteries within their safe limits.
Solution Approach 2:
The charging circuit employs dynamic current adjustment where the processor modifies the charging parameters in real-time based on battery status. The circuit transitions from static charging to adaptive charging, where each battery receives customized current levels that change during the charging process to optimize efficiency and prevent thermal issues.
2Speed
If the charging circuit increases current supply to batteries, then the charging speed is improved, but the heat generation increases reducing safety
Solution Approach 1:
The processor changes the electrical parameters (voltage and current) supplied to each battery based on real-time monitoring. When a battery approaches thermal thresholds, the processor adjusts the charging parameters downward for that specific battery while maintaining higher parameters for cooler batteries, thereby preserving overall charging speed while managing heat generation.
Solution Approach 2:
Different charging parameters are applied to different batteries based on their individual thermal states and charge levels. Each battery receives customized current and voltage levels tailored to its specific conditions, allowing high-speed charging for batteries that can handle it while providing cooler, safer charging to batteries that are thermally stressed.
Data Source
AI summary
An electronic device includes: first and second batteries; a charging circuit to supply power to the first battery through a first path and supply power to the second battery through a second path; and a processor to control the charging circuit to generate a current corresponding to a sum of a first threshold current of the first battery and a second threshold current of the second battery based on power received from a power transmitter, control the charging circuit to supply a first current to the first battery through the first path and supply a second current to the second battery through the second path based on the current, identify the second current supplied to the second battery, and control the charging circuit such that the magnitude of the second current supplied to the second battery is reduced based on the second current exceeding the second threshold current.