Battery Bank Charge-Time Estimation Using Temperature and SOC

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Solution Overview

Problem

There is a need to accurately determine the time required to complete charging in a battery bank unit while it is charging.

Innovation Solution

A battery bank unit with a control apparatus that calculates remaining charge time based on the temperature and state of charge (SOC) of connected battery banks, using a method and program to acquire and utilize these parameters for precise time estimation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the battery bank unit charges multiple battery banks in parallel, then the power supply reliability is improved, but the accuracy of remaining charge time calculation deteriorates

Engineering Contradiction:

Improvepower supply reliabilityVSAvoidremaining charge time calculation accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent segments the battery bank unit into multiple independent battery banks (first battery bank and second battery bank) connected in parallel. Each battery bank can be charged independently, allowing the system to maintain power supply reliability while enabling separate tracking of charge states for more accurate remaining charge time calculation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The control apparatus continuously monitors the state of charge (SOC) of each battery bank and uses this feedback information to calculate and update the remaining charge time. This feedback mechanism ensures accurate time estimation while maintaining reliable power supply through multiple battery banks.

Inventive Principle:

Principle #23Feedback

2Duration of action of stationary object

If the control apparatus switches between multiple battery banks for charging, then the continuous power supply capability is improved, but the complexity of charge management increases

Engineering Contradiction:

Improvecontinuous power supply capabilityVSAvoidcharge management complexity

Core Design Contradiction:

Duration of action of stationary objectVSDevice complexity

Solution Approach 1:

The control apparatus is pre-configured with switching logic that automatically manages the charging sequence between battery banks. This preliminary setup allows seamless switching between battery banks to ensure continuous power supply without requiring complex real-time decision-making, thereby reducing operational complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements periodic switching between battery banks for charging, where each battery bank is charged in turns while others discharge to maintain continuous power supply. This periodic action simplifies charge management by following a predetermined pattern rather than requiring complex real-time optimization.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12567755B2Battery bank unit, remaining charge time calculation method, and remaining charge time calculation program

Publication Date: 2026.03.03 FDK CORP

AI summary

A battery bank unit includes: a first battery bank and a second battery bank that are connected in parallel to each other; and a control apparatus that starts charging the second battery bank after the first battery bank is fully charged. The control apparatus calculates remaining time to complete charge of the battery bank unit based on a temperature of the battery bank unit at a start of the charge of the battery bank unit and a state of charge (SOC) of at least one of the first battery bank and/or the second battery bank at the start of the charge of the battery bank unit.