Battery Life Judgment Using Temperature-Corrected Lifespan Voltage

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Solution Overview

Problem

Existing battery life judgment methods lack accuracy and are costly, as they do not effectively account for battery temperature, which is essential for determining the remaining life of batteries in electronic devices.

Innovation Solution

An electronic device with a temperature sensor, acquisition unit, and controller that acquires measurement data, corrects it based on reference temperature, sets a lifespan voltage, and outputs an alarm when the terminal voltage falls below this voltage, allowing for accurate battery life judgment while reducing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If temperature measurement and correction is implemented, then battery life judgment accuracy is improved, but device complexity increases

Engineering Contradiction:

Improvebattery life judgment accuracyVSAvoiddevice complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The temperature sensor serves dual purposes: it monitors device temperature for thermal management and simultaneously provides data for battery life correction. This multi-functionality allows accurate battery life judgment without adding dedicated hardware, resolving the contradiction between measurement precision and device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system uses its own existing temperature sensor and processing capabilities to perform battery life correction, rather than requiring external specialized equipment. The controller leverages existing computational resources to apply correction algorithms, maintaining simplicity while improving accuracy.

Inventive Principle:

Principle #25Self-service

2Measurement precision

If temperature-based correction is applied, then battery life judgment accuracy is improved, but manufacturing cost increases

Engineering Contradiction:

Improvebattery life judgment accuracyVSAvoidmanufacturing cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The temperature sensor is utilized for multiple purposes including battery life correction, eliminating the need for additional specialized sensors or measurement devices. This approach improves battery life judgment accuracy without increasing manufacturing costs, as the same hardware serves multiple functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system employs standard, readily available temperature sensors and correction algorithms that can be implemented through software updates rather than requiring expensive specialized hardware. This keeps manufacturing costs low while achieving improved measurement precision through accessible technology.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Manufacturing precision

If lifespan voltage threshold is set based on temperature, then battery replacement timing accuracy is improved, but calculation complexity increases

Engineering Contradiction:

Improvebattery replacement timing accuracyVSAvoidcalculation complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The system adjusts the lifespan voltage threshold dynamically based on measured temperature parameters. Correction values are applied to the standard voltage threshold to account for temperature effects on battery chemistry. This approach improves battery replacement timing accuracy by adapting the threshold to actual operating conditions while using straightforward calculation methods.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The controller continuously monitors temperature and adjusts the lifespan voltage threshold accordingly in real-time. This feedback mechanism ensures accurate battery replacement timing by constantly adapting the threshold to current thermal conditions, using simple comparative calculations rather than complex algorithms.

Inventive Principle:

Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This configuration enables accurate battery life judgment, ensuring timely replacement and reducing costs by considering temperature, thus maintaining device functionality with minimal remaining battery life.

Implementation Method 1

a temperature sensor (15) that measures a reference temperature

Methodology Applied

Scientific EffectTemperature measurement:

Data Source

PatentUS11041910B2Electronic device, battery life judgment method, and battery life judgment program

Publication Date: 2021.06.22 YOKOGAWA ELECTRIC CORP

AI summary

An electronic device includes a battery for supplying electrical power for operation of the electronic device, an acquisition unit configured to connect to a measuring instrument and acquire measurement data from the measuring instrument, a temperature sensor configured to measure a reference temperature, and a controller configured to correct the measurement data on the basis of the reference temperature. The controller acquires the terminal voltage of the battery and sets a lifespan voltage on the basis of the reference temperature. The lifespan voltage is used as a standard for outputting an alarm encouraging replacement of the battery before the terminal voltage of the battery falls below the voltage necessary for the electronic device to operate. The controller outputs the alarm when the terminal voltage is less than the lifespan voltage.