Battery Charge Time Prediction Using Average Current at Full Charge
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Solution Overview
Problem
Current algorithms for calculating the remaining charging time of a battery are inaccurate, leading to inconvenience and poor user experience due to large errors, especially during the initial phase of charging.
Innovation Solution
A method and system that determine the remaining charging time by calculating an average value of the present and fully charged charging currents, using either a calculated or actual end-of-charge voltage and constant charging power, to reduce errors and provide a more accurate estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If real-time charging current is used for calculation, then the calculation process is simple, but the remaining charging time accuracy is poor
Solution Approach 1:
The patent predicts the full charge current in advance based on battery parameters and charging power before the charging process completes. This preliminary determination of the future full charge current allows the system to calculate a more accurate average current, thereby improving remaining charging time accuracy without requiring complex real-time monitoring throughout the entire charging process.
Solution Approach 2:
The patent transforms the calculation approach by changing from using a single real-time current parameter to using an average current parameter that incorporates both present current and predicted full charge current. This parameter transformation from instantaneous value to averaged value improves accuracy while maintaining calculation simplicity.
2Ease of operation
If present charging current alone is used, then the calculation is straightforward, but large errors occur especially in initial charging phase
Solution Approach 1:
The system performs preliminary prediction of the full charge current based on battery capacity, voltage, and charging power parameters before the charging completes. This advance calculation enables the system to provide more reliable remaining charging time estimates from the beginning of charging, eliminating the large errors that occur when using only present current data.
Solution Approach 2:
The patent introduces an intermediate calculation step that determines the full charge current as a mediator between present current and remaining charging time. This intermediate parameter serves as a bridge that connects current charging state with future charging completion, providing more reliable predictions while maintaining operational simplicity.
Data Source
AI summary
A method for determining a remaining charging time of a battery. The method includes obtaining a first charging current and a second charging current. The first charging current is a present charging current of the battery, and the second charging current is a charging current of the battery when the battery is fully charged. The method further includes determining an average charging current value based on the first charging current and the second charging current, and determining the remaining charging time based on the average charging current value.