Battery Cell Management Data Misalignment Detection

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Solution Overview

Problem

Existing battery management systems fail to effectively detect data misalignment between battery cell voltage values and battery cell overvoltage flags, which can lead to inefficient battery performance and potential damage.

Innovation Solution

A battery management system that utilizes a microcontroller with first and second applications and tables to exchange encoded channel indexes, allowing for the detection of data misalignment by comparing records in the tables, and commanding a contactor to an open operational position when misalignment is detected.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If data misalignment detection is implemented using multiple applications and tables with encoded channel indexes, then reliability of battery management is improved, but device complexity increases

Engineering Contradiction:

Improvedetection accuracyVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system divides battery management data into separate tables: one table stores encoded channel indexes alongside voltage values, while another table stores encoded channel indexes alongside overvoltage flags. This segmentation allows independent verification of data alignment between voltage measurements and flag states, improving detection accuracy without requiring complete system redesign.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Encoded channel indexes serve as intermediary identifiers that link voltage data and overvoltage flag data across different tables. The first application generates encoded channel indexes from voltage readings, while the second application uses these indexes to retrieve corresponding overvoltage flags, enabling indirect verification of data alignment through a common reference key.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If encoded channel indexes are exchanged between applications to detect misalignment, then data integrity is improved, but loss of time increases

Engineering Contradiction:

Improvedata integrityVSAvoiddetection time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system pre-encodes channel indexes and stores them in tables alongside voltage values and overvoltage flags before actual misalignment detection is needed. This preliminary encoding eliminates the need for real-time computation during detection, allowing rapid comparison of pre-stored encoded indexes to quickly identify data misalignment without time-consuming calculations.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10908218B2Battery cell management system that detects data misalignment between battery cell voltage values and battery cell overvoltage flags

Publication Date: 2021.02.02 LG ENERGY SOLUTION LTD

AI summary

A battery management system having a microcontroller with first and second applications and first and second tables is provided. The first table has a first record with a first encoded channel index and a first battery cell voltage value associated with a first battery cell. The second table has a first record with a first encoded channel index and a first battery cell overvoltage flag associated with the first battery cell. The first application sends the first encoded channel index from the first table to the second application. The second application transitions a contactor to an open operational position, when the first encoded channel index from the first table is not equal to a first predetermined encoded channel index indicating a data misalignment of the first battery cell voltage value and the first battery cell overvoltage flag.