Integrated Power Management Circuit for Battery Charging
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Solution Overview
Problem
Battery-powered devices require separate chargers for recharging, which can be inconvenient and inefficient, as existing designs do not integrate power management and charging functionality within the device.
Innovation Solution
An integrated power management and charger circuit within the battery-powered apparatus, comprising a micro-processor, power switch, programmable current source, and analog-to-digital converter, allows for controlled power supply from an adaptor to the battery, optimizing charging current delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate charger unit is used for battery recharging, then the charging function is provided, but the device complexity increases and convenience decreases
Solution Approach 1:
The patent combines the charger unit, power management unit, and battery into a single integrated circuit. The power management unit includes a microprocessor, programmable current source, and control logic that work together with the battery and charger components. This integration eliminates the need for separate external charger devices, allowing the battery-powered apparatus to recharge itself when connected to an AC adapter, thereby improving convenience while maintaining manageable complexity through unified design.
2Productivity
If charger unit and battery are separate, then charging control is possible, but power management efficiency is reduced
Solution Approach 1:
The power management unit incorporates feedback mechanisms where the microprocessor monitors battery status and charging conditions, then adjusts the programmable current source accordingly. The system reads battery characteristics from memory and uses this information to control the charging current, creating a closed-loop feedback system that optimizes charging efficiency and minimizes energy loss by adapting the charging parameters to real-time battery needs.
Solution Approach 2:
The patent implements dynamic power management through the programmable current source that can adjust charging parameters in real-time based on battery state. The microprocessor dynamically controls the charging process by modifying current levels according to battery characteristics stored in memory and current charging conditions, enabling adaptive and efficient power management rather than fixed charging rates.
3Manufacturing precision
If integrated power management is implemented, then charging current control is improved, but circuit complexity increases
Solution Approach 1:
The power management unit is designed as a universal integrated circuit that performs multiple functions: battery charging control, power management, status monitoring, and communication with the battery. The microprocessor-based controller with programmable current source serves as a multi-functional block that handles various charging scenarios and battery types, achieving precise current control while consolidating what would otherwise require multiple separate circuits into a single versatile unit.
Data Source
AI summary
The present invention discloses a battery powered apparatus with the circuit of integrated power management and charger unit. It mainly comprises a power management and charger unit, a battery powered device, a battery and an adaptor. By integrating the charger unit, the power switch and the programmable current source to the micro-processor, the micro-processor can properly control the power supplied from the adaptor to the battery under the charging mode operation, which further derives a smoother curve of charging current.