Backup Power Source Battery Deterioration Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing backup power supply systems face challenges in temporarily stopping operations to accurately estimate the deterioration state of secondary batteries, leading to potential inappropriate timing and inefficiencies.
Innovation Solution
A backup power supply system incorporating a deterioration estimating device with an interface unit, charging and discharging control unit, detection unit, remaining capacity estimating unit, deterioration estimating unit, and notification unit, which controls battery operations based on voltage, current, and temperature data to estimate battery health and alert when deterioration thresholds are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the backup power supply system temporarily stops operations to estimate battery deterioration, then measurement precision of battery health is improved, but productivity of power supply system deteriorates
Solution Approach 1:
The system performs preliminary actions by continuously monitoring battery parameters (voltage, current, temperature) during normal operation and pre-calculating deterioration indicators. This allows the system to have deterioration estimates ready before any temporary stop is needed, thus improving measurement precision without requiring operational interruption.
Solution Approach 2:
The deterioration estimation process is designed to continue during battery charging and discharging operations. The system continuously accumulates operational data and updates deterioration models in real-time, ensuring that useful action (power supply) continues while measurement (deterioration estimation) also progresses simultaneously.
2Measurement precision
If the system waits for appropriate timing to stop and estimate battery deterioration, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The system implements feedback mechanisms that continuously monitor battery state and compare it against deterioration thresholds. When specific conditions are met (e.g., battery reaches certain charge levels or temperature ranges), the system automatically triggers estimation routines, eliminating the need for manual timing decisions and reducing unnecessary stoppage time while maintaining high measurement precision.
Solution Approach 2:
The system performs preliminary data collection and pre-processing of battery parameters during normal operation. By having preliminary calculations and pre-processed data ready, the actual deterioration estimation can be performed quickly when triggered, thus improving precision without significant time loss.
3Measurement precision
If multiple monitoring parameters (voltage, current, temperature) are continuously measured, then measurement precision of battery state is improved, but use of energy increases
Solution Approach 1:
The system applies partial monitoring by selectively measuring all three parameters (voltage, current, temperature) only when necessary for accurate deterioration estimation. During normal operation, the system may monitor only critical parameters or use reduced measurement frequencies, and intensify monitoring only when deterioration risk increases or specific conditions are met, thus balancing precision with energy conservation.
Solution Approach 2:
The monitoring strategy dynamically changes parameters based on battery state. For example, measurement frequency and precision are adjusted according to operating conditions (charge level, temperature, load). When battery is in stable states, monitoring is reduced; when approaching critical thresholds or during charging/discharging cycles, monitoring intensity increases, optimizing the balance between measurement precision and energy consumption.
Data Source
Figure 1
Figure 2
AI summary
A backup power supply system includes a secondary battery, an interface unit, a charging and discharging control unit, a detection unit, a remaining capacity estimating unit, a deterioration estimating unit, and a notification unit. The interface unit transmits a trigger signal based on an operation of a user. The charging and discharging control unit performs control of discharging the secondary battery and then charging the secondary battery or control of charging the secondary battery and then discharging the secondary battery when the trigger signal is received from the interface unit. The detection unit detects a voltage of the secondary battery at different timings. The remaining capacity estimating unit estimates a remaining capacity of the secondary battery based on the voltage of the secondary battery. The deterioration estimating unit estimates a deterioration state of the secondary battery based on the estimated remaining capacity. The notification unit outputs the estimated deterioration state.