Battery Pack Fireproof Cloth With Expanding Inorganic Heat Shield
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Solution Overview
Problem
Battery electric vehicles face safety risks due to spontaneous combustion accidents, primarily affecting the battery pack, which can lead to vehicle damage or scrapping, necessitating effective thermal insulation and fire protection measures.
Innovation Solution
A thermal insulation fireproof cloth made from fireproof fibers, coated with high-temperature-resistant inorganic materials and structure reinforcing coatings, is designed to protect battery housings from flames and high temperatures, ensuring safety and performance by isolating air and resisting high-temperature shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional battery protection measures are used, then manufacturing cost is reduced, but fire safety and thermal insulation performance are insufficient
Solution Approach 1:
The patent uses composite fireproof fiber materials combining multiple fiber types (basalt fiber, aluminum silicate fiber, glass fiber) to achieve superior fire safety and thermal insulation performance. This composite approach resolves the contradiction by providing enhanced protection while maintaining manufacturing feasibility through established composite material processing techniques.
Solution Approach 2:
The fireproof cloth is designed with different fiber compositions and coating applications in specific areas to address local thermal and mechanical requirements. This localized quality enhancement achieves high fire safety where needed while optimizing manufacturing processes for different regions of the battery protection system.
2Reliability
If thick fireproof materials are used to improve protection, then fire safety is enhanced, but weight increases
Solution Approach 1:
The patent employs lightweight composite fireproof fibers including basalt fiber and aluminum silicate fiber that provide high fire protection performance with lower density compared to traditional thick fireproof materials. This composite material approach achieves enhanced fire safety while reducing overall weight.
Solution Approach 2:
The fireproof cloth utilizes porous structural characteristics that provide effective thermal insulation through air trapping in the porous network, achieving high fire protection performance with reduced material thickness and weight compared to solid dense materials.
3Temperature
If high-temperature resistant coatings are applied, then thermal insulation performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent optimizes coating parameters including thickness (5-20 μm), composition ratios, and application temperatures to achieve effective heat resistance with simplified manufacturing processes. By carefully controlling these parameters, the patent reduces coating process complexity while maintaining superior thermal insulation performance.
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 fireproof cloth effectively prevents battery housings from burning through, maintains battery performance in harsh environments, reduces weight, and ensures easy disassembly and replacement, enhancing fire safety and passenger protection.
Implementation Method 1
the fireproof inorganic coating can be expanded at a high temperature, and the expansion ratio can reach up to 300%. After expansion, the air can be isolated, so that the battery can be isolated from the air to protect the battery while achieving an effect of blocking battery radiation and resisting high temperature
Implementation Method 2
achieving an effect of blocking battery radiation and resisting high temperature
Implementation Method 3
the fireproof cloth made from the fireproof fiber can be used at high temperature, which has excellent fireproof and thermal insulation effect and low thermal conductivity
Data Source
AI summary
The present application relates to a thermal insulation fireproof cloth for power battery and its preparation method. A thermal insulation fireproof cloth for power battery includes a fireproof cloth made from fireproof fiber, which can include one or more layers. The fire-facing surface of the fireproof cloth is coated with a high-temperature-resistant fireproof inorganic coating, and an unexposed surface of the fireproof cloth is coated with a structure reinforcing coating. The fireproof cloth is made into a box shape matching with a battery pack and arranged between a battery cell and battery housing. The fireproof cloth is made of high-silica fiber fabric or alumina fiber fabric. The fireproof inorganic coating is an inorganic material coating including SiO2 and Al2O3. The structure reinforcing coating is a coating which contains PTFE, silane, phosphate and alumina.