Battery Charging Circuit with Capacity-Adaptive Voltage Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Battery life is shortened due to deterioration caused by repeated charging and discharging, and rapid charging further accelerates this deterioration, leading to a rapid reduction in full charge capacity.
Innovation Solution
An electronic device with a processor-controlled charging circuit that adjusts charging voltage and current based on the battery's full charge capacity, reducing them when the capacity falls below a certain threshold to prevent deterioration during rapid charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If rapid charging is performed using rated charging voltage and current, then charging speed is improved, but battery deterioration is accelerated and battery life is shortened
Solution Approach 1:
The charging circuit dynamically adjusts charging voltage and current based on the battery's full charge capacity (FCC). When FCC is within a specific range (80%-100% of design capacity), the circuit applies reduced charging voltage and current to prevent deterioration. When FCC falls below 80%, the circuit switches to rapid charging mode with rated voltage and current, enabling fast charging without causing damage to degraded batteries.
Solution Approach 2:
The system changes charging parameters (voltage and current) based on the battery's state of health. By detecting the full charge capacity and comparing it with design capacity, the system selects appropriate charging parameters: reduced voltage and current for healthy batteries (80%-100% FCC) to prevent deterioration, and rated voltage and current for degraded batteries (below 80% FCC) to enable safe rapid charging.
2Reliability
If reduced charging voltage and current are applied, then battery life is extended, but charging speed is reduced
Solution Approach 1:
The charging circuit dynamically switches between two charging modes based on battery health status. For batteries with 80%-100% of design capacity, it uses reduced voltage and current to extend life. For batteries with below 80% capacity, it switches to rated voltage and current for rapid charging, thus adapting charging speed to battery condition.
Solution Approach 2:
The system changes charging parameters based on the full charge capacity detection. When FCC is 80%-100% of design capacity, it applies reduced parameters (lower voltage and current) to prioritize battery life extension. When FCC drops below 80%, it switches to rated parameters (higher voltage and current) to enable rapid charging without causing deterioration.
Data Source
AI summary
An electronic device is provided. The electronic device includes a battery having a rated charging voltage, a rated charging current, and a design capacity, a charging circuit configured to supply power to the battery, and a processor electrically connected to the battery and the charging circuit. The processor is configured to control the charging circuit to charge the battery in different ways based on a plurality of ranges determined based on a full charge capacity (FCC) of the battery, and, when the FCC of the battery is included in a first range from the design capacity to a first capacity lower than the design capacity, control the charging circuit to charge the battery by setting a first voltage lower than the rated charging voltage and setting a first current lower than the rated charging current.