Heterogeneous Battery Cell Switching for Power Management
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Solution Overview
Problem
Mobile computing devices face challenges in efficient power management, leading to battery life issues and performance degradation due to the inability to balance processor load and thermal conditions effectively, resulting in user dissatisfaction.
Innovation Solution
A method and system for heterogeneous battery cell switching, which involves a control system that assesses the operational context of a device and switches between multiple battery cells to optimize power distribution, using different modes such as connecting one cell at a time, rapidly switching between cells, or drawing current from multiple cells simultaneously, to balance load and enhance battery life and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If power management strategies are applied to control processor and battery utilization, then battery life is extended, but device performance deteriorates
Solution Approach 1:
The system dynamically switches between different battery cell configurations (single cell, parallel pairs, series strings) based on real-time operational conditions, allowing the power management system to adapt between performance-oriented and battery-life-oriented modes without user intervention
Solution Approach 2:
The system changes electrical parameters (voltage, current distribution) by reconfiguring the battery circuit topology through switch matrix control, enabling different operating modes that balance performance and battery life based on processor load and thermal conditions
2Productivity
If processor operates at or near capacity, then device functionality is enhanced, but thermal conditions worsen and force shutdown
Solution Approach 1:
The system proactively monitors processor load and thermal conditions, preemptively switching battery configurations before thermal thresholds are reached, preventing shutdowns by preparing alternative power delivery modes in advance
Solution Approach 2:
The battery system provides multiple functions through reconfiguration: high-power mode for performance demands, extended-life mode for battery conservation, and thermal-management mode for heat mitigation, making the power system adaptable to diverse operational requirements
3Adaptability or versatility
If heterogeneous battery cells are used, then power distribution flexibility is improved, but system complexity increases
Solution Approach 1:
The battery system is segmented into multiple independent cells with individual control, allowing selective activation and configuration of subsets of cells through a matrix switch architecture, enabling flexible power distribution while maintaining manageable complexity through modular control
Solution Approach 2:
A switch matrix acts as an intermediary between the heterogeneous battery cells and the load, abstracting the complexity of cell management and providing simplified control interfaces that enable flexible power distribution without proportionally increasing system complexity
Data Source
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AI summary
Heterogeneous battery cell switching techniques are described for a device having a battery system with heterogeneous battery cells. A control system is provided that is configured to implement a policy for switching a load for the device between the heterogeneous battery cells. The switching may involve selecting between multiple different modes supported by the device based on an assessment of an operational context for the device. Modes available for a heterogeneous battery cell system may include but are not limited to different modes to connect one of the multiple heterogeneous battery cell at a time to service the load, rapidly switch among the multiple heterogeneous battery cells to service the load by drawing a percentage of the overall load from each cell, and/or draw a set amount of current from each of the multiple heterogeneous battery cells to service the load.