Battery Pressure Switch Warning for Thermal Runaway Detection

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Solution Overview

Problem

Existing battery thermal runaway detection systems are energy inefficient and require constant power to function, posing a risk when battery control circuitry shuts down during thermal runaway events.

Innovation Solution

A warning system utilizing an electromechanical switch connected to a pressure actuatable device in the battery, which activates independently of battery control circuitry, providing a power-efficient warning through an electric conduit to an indicating device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If battery control circuitry is used to monitor and detect thermal runaway, then detection capability is improved, but energy consumption increases and reliability decreases when circuitry shuts down

Engineering Contradiction:

Improvedetection reliabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The pressure actuatable device automatically detects thermal runaway conditions through pressure changes without requiring external power or control circuitry. The system serves itself by using the physical pressure changes that naturally occur during thermal runaway to directly actuate the electromechanical switch, eliminating the need for powered monitoring systems.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces electronic/battery control circuitry with a mechanical pressure sensing system. The pressure actuatable device mechanically detects pressure changes caused by thermal runaway and directly actuates the electromechanical switch through mechanical means, substituting the electronic monitoring system with a passive mechanical detection mechanism.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If battery control circuitry is used for thermal runaway detection, then detection accuracy is improved, but system fails when circuitry shuts down during thermal runaway

Engineering Contradiction:

Improvedetection reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the detection function from the battery control circuitry and places it in the pressure actuatable device. By separating the detection mechanism from the powered control system, the detection function remains operational even when the battery control circuitry shuts down, eliminating the single point of failure.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The pressure actuatable device operates autonomously without requiring power from the battery control circuitry. It self-activates when pressure changes occur during thermal runaway, providing reliable detection independent of the battery's powered systems.

Inventive Principle:

Principle #25Self-service

3Use of energy by moving object

If pressure actuatable device is used for detection, then energy efficiency is improved, but detection capability is reduced

Engineering Contradiction:

Improveenergy efficiencyVSAvoiddetection capability

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The pressure actuatable device serves as an intermediary between the thermal runaway process and the electromechanical switch. It translates the thermal/pressure changes occurring during thermal runaway into mechanical actuation of the switch, providing reliable detection while maintaining energy efficiency through this intermediate mechanical translation mechanism.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 reliable thermal runaway detection even when battery control circuitry is shut down, reducing energy consumption and enhancing system reliability and accuracy.

Implementation Method 1

an electromechanical switch configured to be operatively connected to a pressure actuatable device of the battery device such that actuation of the pressure actuatable device causes activation of the electromechanical switch

Methodology Applied

Scientific EffectPressure change detection:

Data Source

PatentUS20260014897A1Warning system for providing a warning indicating a thermal runaway

Publication Date: 2026.01.15 VOLVO TRUCK CORP

AI summary

A warning system for providing a warning indicating a thermal runaway of a battery device, the warning system comprising an electromechanical switch configured to be operatively connected to a pressure actuatable device of the battery device such that actuation of the pressure actuatable device causes activation of the electromechanical switch, and an electric conduit connected to the electromechanical switch and configured to be connected to an indicating device for providing an indication of thermal runaway of the battery device.