Power Management IC for Battery Hot Swapping Without Operation Interruptions
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Solution Overview
Problem
Existing battery swapping technologies in portable devices often result in interruptions to device operations, as they fail to facilitate continuous operation during the swapping of primary power sources.
Innovation Solution
The development of an integrated circuit (IC) for power management that enables true hot swapping by using a secondary power source to maintain device operation during the removal and replacement of a primary power source, without entering a low-power state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing battery swapping technology is used, then battery replacement is possible, but device operation is interrupted
Solution Approach 1:
The system performs preliminary actions by charging the secondary power source (supercapacitor) in advance during normal operation. When battery swapping is needed, the pre-charged secondary power source immediately takes over, enabling seamless transition without operational interruption. This resolves the contradiction by preparing the backup power source beforehand.
Solution Approach 2:
The secondary power source acts as an intermediary between the primary power source and the device. During battery swapping, it temporarily mediates the power supply, absorbing the transition period when the primary power source is disconnected and before the new battery is connected, thus maintaining continuous operation.
2Device complexity
If battery swapping is performed without secondary power source, then device structure is simple, but operation interruption occurs
Solution Approach 1:
The power management system is segmented into multiple independent power sources (primary battery and secondary supercapacitor) with separate control paths. This segmentation allows one power source to take over when the other is being replaced, enabling continuous operation while maintaining relatively simple individual component structures.
3Productivity
If true hot swapping is implemented, then operation continuity is maintained, but power management complexity increases
Solution Approach 1:
The power management integrated circuit is designed with universal functionality to handle multiple power sources and various operating modes (normal operation, battery swapping, reverse boost charging). This multi-functionality consolidates complex control logic into a single IC, achieving operation continuity while managing complexity through integration rather than proliferation of separate components.
Data Source
AI summary
Techniques and apparatus for swapping a primary power source (e.g., a main battery) while using a secondary power source (e.g., a backup battery or a supercapacitor) to power a portable device. One example integrated circuit (IC) for power management generally includes a first power supply node; a second power supply node; a first port for coupling to a primary power source; a first switch coupled between the first power supply node and the first port; a second port for coupling to a secondary power source; a second switch coupled between the first power supply node and the second port; and a third switch coupled between the first and second power supply nodes. For certain aspects, the IC also includes a third power supply node, a voltage regulator coupled between the first and third power supply nodes, and a fourth switch coupled between the second and third power supply nodes.