Rechargeable Battery State Estimation for Online Deterioration Detection

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Solution Overview

Problem

Existing methods for evaluating the state of rechargeable batteries, especially for detecting deterioration modes other than cycle deterioration, require offline operations or rely on statistical processing that may lead to erroneous estimations and cannot determine deterioration states solely from current measurement data without comparing to past states.

Innovation Solution

An online rechargeable battery evaluation system that estimates the state of a rechargeable battery using operation data, including voltage and charge amount, by comparing current data with reference data to calculate indices and determine the deterioration state without stopping the battery's operation, even for batteries that have not operated for a long time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If offline evaluation methods are used to detect deterioration modes, then measurement precision is improved, but productivity deteriorates due to requiring battery operation interruption

Engineering Contradiction:

Improvedeterioration state detection accuracyVSAvoidbattery operation continuity

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent replaces offline mechanical evaluation methods with an online information processing system that uses voltage and charge amount measurements to calculate indices and determine deterioration states continuously during battery operation, eliminating the need to stop the battery while maintaining detection accuracy

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an information processing device as an intermediary that processes voltage and charge amount data to calculate indices representing deterioration states, enabling continuous monitoring without direct interference with battery operation

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If statistical processing methods are used for online evaluation, then productivity is improved by continuous operation, but measurement precision deteriorates due to erroneous estimations

Engineering Contradiction:

Improvecontinuous operation capabilityVSAvoiddeterioration state estimation accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent changes the evaluation parameters from statistical processing of multiple data points to direct calculation of indices based on voltage and charge amount measurements, improving measurement precision while maintaining continuous operation capability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces statistical processing methods with an information processing approach that calculates specific indices from voltage and charge amount data, eliminating estimation errors while enabling continuous online monitoring

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If current measurement data alone is used for state determination, then productivity is improved by real-time evaluation, but measurement precision deteriorates due to inability to determine deterioration state

Engineering Contradiction:

Improvereal-time evaluation speedVSAvoiddeterioration state determination accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent performs preliminary actions by measuring and storing voltage and charge amount data during battery operation, which are then used to calculate indices that accurately determine deterioration states in real-time without needing additional offline measurements

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11921162B2Information processing device, information processing method, non-transitory computer readable medium, and information processing system

Publication Date: 2024.03.05 KK TOSHIBA

AI summary

According to one embodiment, the information processing device includes: a first state estimator configured to estimate a state of a target rechargeable battery based on: first data including a charge amount and voltage value of a rechargeable battery; information including a state of the rechargeable battery; and second data including a charge amount and voltage value of the rechargeable battery.