Selective Battery Pulsation for EMI Reduction
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Solution Overview
Problem
Online battery backup systems face degradation due to deposit accumulation, which reduces battery capacity and increases resistance, and the application of pulsation energy to counteract this causes unacceptable electromagnetic interference (EMI) in critical equipment.
Innovation Solution
A system that selectively applies pulsation energy to specific battery units within an online battery backup system, using a pulse generation circuit, switch devices, and a controller to minimize EMI, by sampling float voltage drops and applying energy only to units with the greatest voltage drop, while omitting connections to end units to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If pulsation energy is applied to all battery units in an online battery backup system, then battery service life is extended and deposit accumulation is counteracted, but electromagnetic interference (EMI) into connected electronic equipment increases to unacceptable levels
Solution Approach 1:
The battery string is divided into individual battery units, and pulsation energy is applied selectively to only some units rather than all units. The system identifies and targets specific battery units that require pulsation treatment based on their individual needs, segmenting the treatment approach to reduce overall EMI while maintaining effectiveness.
Solution Approach 2:
Different battery units receive different treatments based on their individual characteristics and conditions. The system applies pulsation energy locally to specific units that have deposit accumulation issues, rather than uniformly treating all units. This localized approach reduces total EMI exposure to electronic equipment while still addressing the problems where they exist.
2Reliability
If pulsation energy is applied frequently to counteract deposit accumulation, then battery capacity is maintained and electro-chemical reaction rates are improved, but maintenance frequency increases and system reliability decreases due to EMI
Solution Approach 1:
The system continuously monitors battery parameters such as voltage, current, and electro-chemical reaction rates to detect early signs of deposit accumulation. By implementing feedback monitoring, the system can identify when pulsation treatment is actually needed and apply it only at those times, reducing unnecessary treatments that would increase maintenance frequency and EMI exposure, thereby maintaining reliability without excessive maintenance.
3Duration of action of stationary object
If pulsation energy is applied to battery units with the greatest float voltage drop, then treatment effectiveness is optimized and service life is extended, but device complexity increases due to voltage sampling and selective switching requirements
Solution Approach 1:
The battery units essentially identify themselves as needing treatment through their float voltage drop characteristics. The voltage sampling circuit measures this inherent parameter that already exists in the battery system, and the selective switching mechanism responds to these natural variations. This self-service approach minimizes the need for complex external diagnostic equipment while still achieving targeted treatment of the most affected units.
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
This approach extends battery service life, reduces maintenance frequency, and minimizes EMI into electronic equipment, thereby maintaining system reliability and extending the interval between maintenance periods.
Implementation Method 1
the application of pulsation energy, generally in the form of radio frequency (RF) energy, during the charging of a battery or battery string
Implementation Method 2
various products are generated by the electro-chemical reactions which take place within the battery cells
Implementation Method 3
A controller is operatively connected to the pulse generation circuit and the voltage sampling circuit, and programmed to sample the circuit voltage
Implementation Method 4
the pulsation energy applied to the batteries may cause unacceptable levels of electro-magnetic interference (EMI) to be conducted and/or radiated into that equipment
Data Source
AI summary
A method of applying pulsation energy to an online battery backup system including the steps of sampling at least one voltage sampling circuit to monitor a float voltage drop across the terminals of each battery unit within a plurality of battery units, selecting from among the plurality of battery units the unit having the greatest float voltage drop, operating a pulse generation circuit to apply pulsation energy across the terminals of only the selected battery unit, and ceasing to operate the pulse generation circuit in response to a predetermined trigger. A generally corresponding method may be performed on each battery cell within the plurality of battery units. Also, battery pulsation systems for an online battery backup system may include a pulse generation circuit and a controller for selectively applying pulsation energy across the terminals of a selected battery unit or battery cell.