Wireless Lead-Acid Battery Monitoring With Split Measurement Cycles
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Solution Overview
Problem
Existing lead-acid battery monitoring systems face high wiring and communication costs due to wired connections, and frequent internal resistance measurements lead to unnecessary discharge, affecting battery degradation.
Innovation Solution
A lead-acid battery monitoring device utilizing wireless communication with sensor units and a control unit that performs separate monitoring operations for temperature and internal resistance, allowing for high-accuracy state assessment by increasing temperature measurement frequency while reducing unnecessary discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired connections are used for battery monitoring, then communication reliability is improved, but wiring costs and system complexity increase
Solution Approach 1:
The patent replaces the mechanical wired connection system with a wireless communication system. The monitoring device communicates with battery management units via wireless signals, eliminating the need for physical wiring while maintaining communication functionality. This substitution reduces wiring complexity and installation costs while preserving the essential monitoring capability.
2Measurement precision
If internal resistance measurement is performed frequently, then battery state monitoring accuracy is improved, but battery discharge and degradation increase
Solution Approach 1:
The patent implements periodic measurement with varying frequencies based on measurement type. Temperature measurements are performed at a first (higher) frequency, while internal resistance measurements are performed at a second (lower) frequency. This periodic action with differentiated intervals allows adequate monitoring of temperature-critical conditions while minimizing the frequency of discharge-inducing internal resistance measurements, thus reducing battery degradation.
Solution Approach 2:
The patent applies different measurement frequencies to different parameters based on their specific characteristics. Temperature, which has immediate impact on battery safety and performance, is measured more frequently than internal resistance. This localized differentiation of measurement quality and frequency optimizes the balance between monitoring accuracy and battery protection.
3Measurement precision
If temperature measurement frequency is increased, then degradation prediction accuracy is improved, but energy consumption and measurement burden increase
Solution Approach 1:
The patent employs periodic temperature measurements at optimized intervals that balance accuracy requirements with energy conservation. By determining appropriate measurement cycles based on battery operating conditions and degradation risk assessment, the system achieves sufficient prediction accuracy while minimizing unnecessary frequent measurements that would consume excess energy.
Data Source
AI summary
A lead-acid battery monitoring device includes a plurality of sensor units 20 attached to a plurality of lead-acid batteries 1 connected in series and/or in parallel and a control unit 10 that sequentially establishes wireless communication connection with the plurality of monitoring units 20. The lead-acid battery monitoring device executes a first monitoring operation in which the management unit 10 sequentially receives monitoring data including an internal resistance and a temperature of each lead-acid battery 1 from the plurality of monitoring units 20 and a second monitoring operation in which the management unit 10 sequentially receives monitoring data including the temperature of each lead-acid battery 1 from the plurality of monitoring units 20.