Integrated Power Management Circuit for Battery Pack Protection
Solution Overview
Problem
Conventional battery management systems for portable electronic devices require separate chips for charging and protection functions, leading to increased size and complexity, making them inconvenient for portable use.
Innovation Solution
A power management system integrated into a single chip that includes a switching circuit, a sensing circuit for temperature monitoring, and a power management unit capable of monitoring voltage and current, which generates signals to control the charging and protection functions, preventing damage from abnormal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If charging and protection functions are implemented by separate circuits on different chips, then each circuit can be optimized independently, but the overall system size and complexity increase
Solution Approach 1:
The patent combines the charging control circuit and protection control circuit into a single integrated power management chip. The charging control module monitors battery voltage and current to control charging processes, while the protection control module simultaneously monitors for abnormal conditions (over-voltage, over-current, temperature) and activates protection operations. This integration reduces the number of separate chips and packages needed, directly addressing the technical contradiction by merging previously separate functions into one unified device.
2Ease of operation
If both charging and protection functions are integrated into a single chip, then the number of packages is reduced, but the chip size becomes much larger
Solution Approach 1:
The power management chip is segmented into distinct functional modules: a charging control module with voltage and current detection circuits, a protection control module with temperature sensing and abnormal condition detection, and a control unit that coordinates both functions. This segmentation allows efficient layout and resource sharing within the single chip, reducing the overall chip area compared to a non-modular design while maintaining both charging and protection functions.
3Ease of operation
If a single chip integrates both charging and protection functions, then portability is improved, but the chip becomes much more complex
Solution Approach 1:
The power management chip is designed as a universal device that performs multiple functions: charging control (voltage regulation, current limiting), protection control (over-voltage protection, over-current protection, temperature monitoring), and coordination between these functions through a unified control unit. This multi-functional design consolidates what would otherwise require separate chips, improving portability while managing complexity through integrated design.
Data Source
AI summary
A power system for managing charging, discharging and protection of rechargeable batteries is disclosed. The power system mainly includes a power system. The power system includes a switching circuit coupled to the rechargeable batteries to charge and discharge the rechargeable batteries. The power system includes a power management unit to control the switching circuit. The power system includes a temperature sensing circuit to monitor a temperature of the batteries, voltage detectors to monitor voltages of the batteries, and current detectors to monitor a current of the batteries. If an abnormal condition is sensed by the power management unit when the power system is in an operating mode, the power management unit will terminate the operating mode by switching off the switching circuit to protect the batteries and the power system.