Integrated Current Fault Controller for Battery Systems
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Solution Overview
Problem
Multifunction portable devices face challenges in effectively managing power distribution and isolating faulty components due to varying operational states and current loads, leading to potential damage and inefficient power allocation.
Innovation Solution
A power allocation and fault controller system that monitors and discriminates among multiple loads, allocates power based on priority, and decouples or limits current to faulty components, ensuring critical functions continue while managing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single high current threshold is used for all loads, then protection against extreme faults is achieved, but false shutdowns occur during normal high-power operations
Solution Approach 1:
The patent applies local quality by assigning different current thresholds to different loads based on their specific operational characteristics. Each load receives a customized threshold value that matches its normal operating range, allowing the system to distinguish between normal high-power operations and actual faults. This resolves the contradiction by enabling reliable fault detection without causing false shutdowns during legitimate high-current operations.
Solution Approach 2:
The patent implements dynamics by making the current threshold adaptive rather than static. The threshold for each load can be dynamically adjusted based on operational state, allowing the system to accommodate varying current demands while maintaining appropriate fault detection. This resolves the contradiction between maintaining high availability and providing reliable protection.
2Measurement precision
If all loads are monitored with individual current thresholds, then accurate fault detection is achieved, but system complexity increases
Solution Approach 1:
The patent applies universality by implementing a single microcontroller that performs multiple functions: monitoring all loads, storing individual thresholds, comparing current measurements, and controlling shutdown decisions. This multi-functional approach achieves accurate fault detection for each load without requiring separate control circuits, thereby reducing overall system complexity while maintaining high measurement precision.
Solution Approach 2:
The patent merges the fault monitoring and control functions into a unified system managed by one microcontroller. By combining threshold storage, current measurement, comparison logic, and shutdown control into a single integrated controller, the system achieves precise individual load monitoring without the complexity of multiple independent control circuits.
3Object-affected harmful factors
If the first faulty load is immediately shut down, then damage prevention is achieved, but critical functions may be lost
Solution Approach 1:
The patent applies preliminary action by pre-classifying each load as critical or non-critical before fault conditions occur. When a fault is detected, the microcontroller checks the classification and selectively shuts down only non-critical loads. This preliminary categorization enables the system to prevent damage to faulty components while preserving critical functions, resolving the contradiction between damage prevention and function availability.
Data Source
AI summary
A fault monitoring and management system integrates a fault controller with the power load functions within the power management device of a battery operated system. Multiple input load lines allow the fault controller to diagnose and disable defective or faulty power load functions that draw current from the system supply or battery. In addition, the fault monitor allows the system to stay operational if the fault is non-catastrophic to the critical functions.