Reconditioning Exhausted UPS Battery Modules via Voltage Detection
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Solution Overview
Problem
Exhausted battery modules in uninterruptible power supply systems face irreversible damage due to exhaustive discharge, leading to reduced service life and potential instability during recharging, especially when internal discharge monitoring switches accumulator units into protection mode, causing charging issues and increased costs due to premature replacement.
Innovation Solution
A method that determines the terminal voltage of the battery module, activates an inverse polarity protection unit for a short time to assess communication, and applies a charging voltage if voltage drops indicate a minimum threshold is met, allowing the battery module to be reconditioned and returned to a chargeable state, distinguishing between defective and protected accumulator units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If internal exhaustive discharge monitoring switches accumulator units into protection mode, then safety is improved, but charging capability deteriorates causing premature replacement
Solution Approach 1:
The system performs preliminary detection of the protection mode state by measuring terminal voltage and determining voltage drops across accumulator units before attempting charging. This allows the system to identify and address exhausted states in advance, preventing charging failures and unnecessary replacements.
Solution Approach 2:
The system changes the detection parameters by measuring terminal voltage and calculating voltage drops across individual accumulator units to identify protection mode states. This parameter-based detection enables differentiation between defective and protected units, allowing appropriate charging strategies to be applied.
2Reliability
If battery modules are replaced prematurely due to exhaustion protection, then system reliability is maintained, but operational costs increase
Solution Approach 1:
The system implements feedback by continuously monitoring terminal voltage and voltage drops to detect protection mode states. This feedback mechanism allows the charging unit to adapt its operation, preventing premature replacement of accumulator units and reducing operational costs while maintaining system reliability.
Solution Approach 2:
The system provides self-service by automatically detecting exhausted states and adjusting charging parameters without external intervention. This prevents unnecessary replacements and reduces operational costs while maintaining system reliability through automated protection and recovery mechanisms.
3Measurement precision
If terminal voltage is measured to detect exhausted state, then detection accuracy is improved, but system complexity increases
Solution Approach 1:
The terminal voltage measurement serves multiple functions: detecting exhausted states, determining protection mode status, and guiding charging operations. This multi-functionality improves detection accuracy without significantly increasing system complexity, as the same measurement infrastructure is used for multiple purposes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the reconditioning of exhausted battery modules, preventing unnecessary replacement and maintaining system functionality by accurately identifying and addressing exhausted states, thus extending the life of accumulator units and reducing operational costs.
Implementation Method 1
An accumulator unit or a rechargeable battery pack is an interconnected bundle of a plurality of accumulator cells, which are retained by an enclosure and protected from external influences. The accumulator unit constitutes a rechargeable store for electrical energy, typically based on an electrochemical system, by way of which electrical energy is converted into chemical (stored) energy during charging and converted back into electrical energy during discharging.
Data Source
AI summary
Uninterruptible power supply system and method for reconditioning an exhausted battery module, wherein a terminal voltage of the battery module is determined and compared with a predefinable threshold value after starting a network-side supply, where after a waiting time has elapsed, when the threshold value is fallen below, an inverse polarity protection unit is activated for a time pulse, such that when communication between the base unit and the battery module occurs, the inverse polarity protection unit is permanently switched on and a voltage drop is determined and compared within the battery module with a predefined minimum voltage, and if at least one determined voltage drop falls below the predefined minimum voltage, then a predefined charging voltage is applied to the battery module until either a predefinable period of time is exceeded or a predefinable current value is surpassed by a charging current determined in the base unit.