Hydrogen Sensing for Battery Cell Overtemperature Detection

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Solution Overview

Problem

Existing battery monitoring systems fail to detect overtemperature in individual battery cells, leading to potential thermal runaway events due to reliance on single temperature sensors that cannot identify localized temperature anomalies within battery modules.

Innovation Solution

A battery monitoring system that measures hydrogen concentrations within each battery cell to predict and detect thermal runaway by monitoring molecular hydrogen gas concentration and rate of rise, allowing for early detection and corrective action.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If single temperature sensors are used to monitor battery cells, then device complexity is reduced, but measurement precision and reliability of overtemperature detection deteriorate

Engineering Contradiction:

Improvemonitoring system structureVSAvoidovertemperature detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent changes the monitoring parameter from temperature directly to hydrogen concentration as an early indicator. By measuring hydrogen concentration produced during thermal decomposition of battery materials, the system detects overtemperature conditions before they become critical, improving measurement precision without requiring complex multi-sensor arrangements.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces hydrogen concentration as an intermediary parameter between temperature and thermal runaway detection. Instead of directly measuring temperature with multiple sensors, the system uses hydrogen concentration produced by thermal decomposition as a mediator that provides earlier and more precise warning of overheating conditions.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If hydrogen concentration monitoring is implemented, then reliability of thermal runaway prediction is improved, but device complexity increases

Engineering Contradiction:

Improvethermal runaway prediction accuracyVSAvoidhydrogen sensing system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the monitoring function by separating hydrogen concentration sensing from temperature sensing. The hydrogen sensing system specifically targets early thermal decomposition detection, while existing temperature sensors handle later-stage monitoring. This segmentation improves thermal runaway prediction reliability by assigning specialized detection to each sensor type.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary detection by measuring hydrogen concentration before critical temperature rise occurs. Hydrogen is produced during early thermal decomposition of battery materials, providing advance warning that allows the system to take preventive action before thermal runaway develops, thereby improving prediction reliability.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If continuous hydrogen concentration measurement is performed, then reliability of early detection is improved, but use of energy increases

Engineering Contradiction:

Improveearly detection capabilityVSAvoidenergy consumption of monitoring system

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic sampling of hydrogen concentration rather than truly continuous measurement. The controller measures hydrogen concentration at regular intervals and compares successive readings to detect rate of change. This periodic approach maintains early detection reliability while significantly reducing energy consumption compared to continuous high-frequency sampling.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies partial monitoring by focusing hydrogen sensing resources on detecting the rate of concentration change rather than continuously measuring absolute concentration at maximum precision. This approach provides sufficient early detection capability while consuming less energy than full continuous high-precision measurement would require.

Inventive Principle:

Principle #16Partial or excessive action

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

Enables early prediction and detection of thermal runaway and excessive cell overtemperature, enabling timely corrective measures to prevent damage.

Implementation Method 1

a hydrogen sensing system configured to selectively measure a plurality of hydrogen concentrations in a plurality of battery cells

Methodology Applied

Scientific EffectHydrogen detection:

Data Source

PatentUS12603336B2Battery monitoring system for measuring hydrogen concentration to detect battery cell overtemperature and predict thermal runaway

Publication Date: 2026.04.14 GM GLOBAL TECHNOLOGY OPERATIONS LLC

AI summary

A battery monitoring system includes a hydrogen sensing system configured to selectively measure a plurality of hydrogen concentrations in a plurality of battery cells, respectively. A controller is configured to detect battery cell overtemperature in at least one of the plurality of battery cells in response to a corresponding one of the plurality of measured hydrogen concentrations of the plurality of battery cells.