A fire protection composite made of a liquid applied coating and a mat or fleece for an electric vehicle battery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fire protection products for electric vehicle batteries lack sufficient fire protection, heat shielding, and mechanical stability, especially during thermal runaway events.
Innovation Solution
A fire protection composite comprising a liquid applied coating and a mat or fleece, where the coating is applied on a substrate, followed by the mat or fleece, and optionally another coating layer, with the combination providing improved adhesion, mechanical stability, and heat shielding properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single fire protection coating is applied to the battery substrate, then the application process is simple, but the fire protection and heat shielding performance is insufficient
Solution Approach 1:
The patent applies a composite structure consisting of a liquid applied coating layer and a mat or fleece layer combined together. The liquid coating provides fire retardancy and adhesion to the substrate, while the mat or fleece layer enhances heat shielding and mechanical stability. This composite approach resolves the contradiction by achieving superior fire protection performance through material combination while maintaining a relatively simple two-layer application process.
2Reliability
If a thick fire protection layer is applied to ensure sufficient heat shielding, then fire protection performance is improved, but mechanical stability and electrical insulation deteriorate
Solution Approach 1:
The composite structure of a thin liquid coating combined with a mat or fleece layer provides effective heat shielding without requiring a thick single layer. The mat or fleece material inherently possesses good mechanical stability and electrical insulation properties, which compensates for any potential degradation caused by the fire protection function. This resolves the contradiction by distributing functions across different material layers.
Solution Approach 2:
Different layers of the composite are designed with different local properties: the liquid coating layer provides fire retardancy and adhesion, while the mat or fleece layer provides mechanical stability and heat shielding. Each layer is optimized for its specific function, allowing the overall composite to achieve heat shielding performance without sacrificing mechanical stability.
3Ease of operation
If conventional fire protection products are used, then application is straightforward, but mechanical stability during thermal runaway events deteriorates
Solution Approach 1:
The mat or fleece layer in the composite structure provides enhanced mechanical stability and structural integrity during thermal runaway events, while the liquid coating layer can be applied using conventional straightforward methods. The combination of these two layers creates a system that maintains mechanical strength under extreme conditions while remaining relatively easy to apply.
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 composite effectively enhances fire protection, heat shielding behavior, and mechanical stability, maintaining temperature below 300°C for at least 10 minutes and withstanding thermal runaway tests without damaging the underlying substrate.
Implementation Method 1
the composite effectively enhances fire protection, heat shielding behavior, and mechanical stability, maintaining temperature below 300°C for at least 10 minutes
Implementation Method 2
the coating is applied on a substrate, followed by the mat or fleece, and optionally another coating layer, with the combination providing improved adhesion, mechanical stability
Data Source
Figure 1~2b
Figure 3~4
Figure 5a~5b
AI summary
The present invention relates to a fire protection composite, which is made of a liquid applied coating and a mat or fleece; a process for preparing the fire protection composite; use of the fire protection composite for electric vehicle battery; an electric vehicle battery containing the fire protection composite; and a process for preparing the electric vehicle battery.