Two-Part Fire Retardant Coating for EV Battery Boxes

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Solution Overview

Problem

Current fireproof coatings for electric vehicle batteries are either labor-intensive for large-scale production or lack the necessary heat and fire-retardant properties, and do not meet the requirements for high-speed and accuracy in applications.

Innovation Solution

A two-part, room temperature curable heat and fire retardant composition comprising an epoxy resin, flame retardant compounds, and specific amines, which can be applied via contactless coating methods like flat stream or spray coating, providing a thin, lightweight layer with enhanced heat and fire insulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If mica sheets are used as fire protection coating, then fire retardant properties are improved, but labor intensity and manufacturing complexity increase

Engineering Contradiction:

Improvefire retardant propertiesVSAvoidlabor intensity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces the manual mechanical application of mica sheets with an automated spray coating system that applies a liquid fire retardant composition, eliminating labor-intensive manual handling while maintaining fire protection effectiveness

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention changes the physical state of the fire retardant material from solid mica sheets to a liquid composition that can be sprayed, enabling automated application while achieving comparable or superior fire retardant properties through chemical formulation

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If conventional fire retardant compositions are used, then ease of application is improved, but heat and fire retardant properties are insufficient

Engineering Contradiction:

Improveease of applicationVSAvoidheat and fire retardant properties

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent formulates a composite fire retardant composition containing intumescent agents, binders, and flame retardant compounds that work synergistically to provide both ease of spray application and superior heat/fire resistance, overcoming the limitations of conventional single-function compositions

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention modifies the chemical composition and physical properties of the fire retardant material to achieve optimal balance between applicability (viscosity, spray characteristics) and performance (fire retardancy, adhesion), enabling both easy application and reliable protection

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If traditional coating methods are used, then application simplicity is improved, but cure speed and process efficiency are insufficient

Engineering Contradiction:

Improveapplication simplicityVSAvoidcure speed

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent employs a two-component system where mixing initiates a controlled chemical reaction that progresses through distinct stages, enabling rapid curing while maintaining application simplicity through standard spray equipment

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The invention changes the curing mechanism from slow ambient drying to rapid chemical crosslinking through component mixing, dramatically increasing cure speed while maintaining ease of application through unchanged spray application methodology

Inventive Principle:

Principle #35Parameter changes

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

The composition enables high-speed, accurate, and automated application, maintaining temperature below 300°C for at least ten minutes during thermal propagation tests, while reducing waste and ensuring excellent heat and fire retardant properties.

Implementation Method 1

a two-part, room temperature curable heat and fire retardant composition comprising a first part comprising an epoxy resin; and a second part comprising a first amine and a second amine

Methodology Applied

Scientific EffectChemical reaction: Chemical Bonding

Implementation Method 2

2) a flame retardant compound; and a second part comprising 1) a first amine comprising N,N′-bis(3-aminopropyl)ethylenediamine and 3,3′-oxybis(ethylene-oxy) bis(propylamine)

Methodology Applied

Scientific EffectFlame retardant mechanism: Thermal Insulation

Data Source

PatentUS20250011603A1Two-part, room temperature curable heat and fire retardant composition

Publication Date: 2025.01.09 HENKEL KGAA

AI summary

The present invention relates to a two-part, room temperature curable heat and fire retardant composition comprising a first part comprising 1) an epoxy resin; and 2) a flame retardant compound; and a second part comprising 1) a first amine comprising N,N′-bis(3-aminopropyl)ethylenediamine and 3,3′-oxybis(ethylene-oxy) bis(propylamine); 2) a second amine comprising m-phenylenebis(methylamine) and formaldehyde, polymer with 1,3-benzenedimethanamine and phenol; and 3) a flame retardant compound. The composition according to the present invention can be used as a heat and fire retardant coating composition or a structural adhesive or a potting compound, especially as a coating composition for car battery boxes.