EV Battery Disconnect Coupling for Fire-Triggered Pack Removal

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Solution Overview

Problem

Electric vehicle batteries pose significant challenges in fire emergencies due to their inaccessible placement and the ineffectiveness of traditional firefighting methods, leading to extensive human and material damage, especially in parked vehicles.

Innovation Solution

An automatic battery disconnect system using temperature detection to sever the battery connection when the temperature exceeds a threshold or smoke is detected, featuring a sensor, connector, casing, and electronic coupling parts to safely remove the battery from the vehicle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the battery is enclosed in the vehicle to provide power, then power supply capability is improved, but accessibility for firefighting deteriorates

Engineering Contradiction:

Improvepower supply capabilityVSAvoidaccessibility for firefighting

Core Design Contradiction:

Use of energy by moving objectVSEase of operation

Solution Approach 1:

The battery system is divided into separable modules: the battery pack itself and the vehicle body. The electronic coupling part enables the battery to be disconnected and removed as an independent unit, allowing firefighters to access and treat the battery separately from the vehicle without needing to open or dismantle the vehicle structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The battery pack is extracted from the vehicle as a removable component. The electronic coupling part with unlockable coupling module enables the battery to be taken out completely from the vehicle, placing it in an external location where traditional firefighting methods can be effectively applied without the constraints of vehicle enclosure.

Inventive Principle:

Principle #2Taking out (Extraction)

2Productivity

If the battery remains connected during fire emergencies, then vehicle operation is maintained, but damage extent increases

Engineering Contradiction:

Improvevehicle operationVSAvoiddamage extent

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary detection of temperature and smoke conditions. When abnormal conditions are detected, the electronic coupling part automatically unlocks the coupling module and disconnects the battery before the fire can spread extensively, preventing greater damage while minimizing impact on vehicle operation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The battery disconnect system operates autonomously through self-service mechanisms: sensors automatically detect temperature and smoke conditions, the control system automatically triggers the unlocking of the coupling module, and the battery is automatically disconnected without requiring manual intervention, enabling rapid response to fire emergencies.

Inventive Principle:

Principle #25Self-service

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

Minimizes human and material damage by automatically disconnecting and safely removing the battery from the vehicle, facilitating easier fire extinguishment and occupant safety.

Implementation Method 1

a sensor part configured to measure a temperature of the battery part

Methodology Applied

Scientific EffectTemperature detection: Thermal Radiation

Implementation Method 2

a sensor part configured to measure a temperature of the battery part and detect smoke

Methodology Applied

Scientific EffectSmoke detection: Absorption (EM radiation)

Data Source

PatentUS20260061816A1Automatic battery disconnect system for electric vehicles using temperature detection and method using the same

Publication Date: 2026.03.05 KIM UN CHAE

AI summary

An electric vehicle battery automatic disconnection system using temperature detection including a battery part configured to provide power to an electric vehicle, a sensor part configured to measure a temperature of the battery part and detect smoke, a connector part configured to charge the battery part, a casing part having an inner space for housing the battery part, and an electronic coupling part configured to couple the casing part to a lower part of the electric vehicle, in which the electronic coupling part is further configured to disconnect the casing part from the lower part of the electric vehicle when the temperature detected by the sensor part exceeds a predetermined threshold or when smoke is detected.