Battery Charge Time Estimation With Charge Stop Compensation
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Solution Overview
Problem
Conventional power storage apparatuses using the bank switch method do not accurately account for charge stop times, leading to inaccuracies in remaining charge time estimation.
Innovation Solution
A power storage control apparatus that computes remaining charge time through linear approximation of the correlation between the operating environment and charge time, including charge stop time, using a processor and stored correlation data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conventional remaining charge time computing method using SOC integration is employed, then the computation is simple, but the accuracy of remaining charge time estimation deteriorates when charge stop time occurs
Solution Approach 1:
The patent changes the computational parameters from simple SOC integration to a comprehensive model that includes charge stop time detection and calculation. By introducing additional parameters (charge stop time, operating environment factors) and changing the computation methodology, the system achieves higher accuracy in remaining charge time estimation while accepting increased computational complexity.
2Reliability
If the bank switch method is used for power storage device management, then continuous power supply capability is improved, but charge stop time is introduced between device switches
Solution Approach 1:
The patent applies beforehand cushioning by detecting and calculating charge stop time in advance, then compensating for this time loss in the remaining charge time computation. The system prepares for the inevitable charge stop time introduced by bank switching by incorporating it into the estimation model, thus cushioning the impact on overall charging efficiency and accuracy.
3Reliability
If charge stop time is not considered in remaining charge time computation, then the computation model remains simple, but the reliability of power supply management deteriorates
Solution Approach 1:
The patent implements feedback by continuously monitoring the actual charge stop time and using this information to adjust and refine the remaining charge time computation. The system feeds back the detected charge stop time into the computation model, creating a closed-loop system that improves reliability of power supply management while managing computation model complexity through iterative refinement.
Data Source
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AI summary
A power storage control apparatus (20) includes a processor (22) that computes a remaining charge time of a power storage apparatus (30) that supplies power to a load apparatus (3) operating by power supply from an external power source (2) in case of a power supply emergency of the external power source, and the processor (22) computes the remaining charge time of the power storage apparatus based on linear approximation of correlation between an operating environment parameter of the power storage apparatus and a charge time of the power storage apparatus including a charge stop time.