Aerogel Thermal Barrier Coating for Uniform Battery Casing Insulation
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Solution Overview
Problem
Existing thermal battery designs face issues with non-uniform thermal insulation leading to uneven cooling, potential damage during insertion, and increased weight and volume due to thick fiberglass wraps, which can result in battery failure and short circuits.
Innovation Solution
A thermal barrier coating (TBC) made of aerogel material reinforced with ceramic fibers and particles, applied as a rigid layer on the battery casing, providing uniform insulation and preventing damage during insertion, thus maintaining consistent temperature and preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thick fiberglass wraps are used for thermal insulation, then insulation effectiveness is improved, but weight and volume increase
Solution Approach 1:
The patent changes the material parameter from traditional fiberglass to aerogel, which has fundamentally different thermal insulation properties. Aerogel provides superior insulation performance per unit thickness, allowing reduction of insulation layer thickness while maintaining or improving thermal management effectiveness, thereby reducing overall weight and volume.
Solution Approach 2:
The patent employs composite material structure by combining aerogel with ceramic fibers and particles to create a TBC that integrates thermal insulation, mechanical strength, and damage resistance. This composite approach achieves better insulation effectiveness without proportionally increasing weight, as the ceramic components provide structural support.
2Reliability
If thick fiberglass wraps are used for thermal insulation, then insulation effectiveness is improved, but volume increases
Solution Approach 1:
By changing the insulation material from fiberglass to aerogel, the thermal conductivity parameter is significantly reduced. This allows the insulation layer to achieve the same thermal resistance with much smaller thickness, directly reducing the volume occupied by the battery casing while maintaining insulation effectiveness.
Solution Approach 2:
Aerogel is a highly porous material with extremely low density and exceptional thermal insulation properties. The patent utilizes this porous structure to achieve superior insulation in a minimal volume, as the trapped air pockets in the aerogel matrix provide thermal resistance without adding significant mass or volume.
3Reliability
If fiberglass wraps are used for thermal insulation, then thermal retention is improved, but non-uniform insulation causes uneven cooling and potential damage
Solution Approach 1:
The TBC combines aerogel with ceramic fibers and particles to create a composite material that maintains structural integrity and uniformity. The ceramic components provide a rigid framework that ensures consistent insulation properties throughout the coating, preventing the non-uniformity issues associated with flexible fiberglass wraps.
Solution Approach 2:
The patent changes the physical state of the insulation from flexible (fiberglass) to rigid (aerogel-based TBC). This rigidity enables more precise and uniform application to the battery casing surface, ensuring consistent thermal insulation properties across all surfaces and eliminating uneven cooling problems.
4Reliability
If flexible fiberglass insulation is used, then thermal insulation is provided, but damage during insertion occurs
Solution Approach 1:
The TBC uses composite material construction with aerogel, ceramic fibers, and particles to create a structure that is both insulating and mechanically robust. The ceramic components provide high strength and damage resistance, protecting the insulation from damage during battery insertion and handling while maintaining thermal insulation effectiveness.
Solution Approach 2:
The patent transforms the insulation material from flexible and vulnerable (fiberglass) to rigid and protective (aerogel TBC). This parameter change in material state provides inherent mechanical strength that prevents damage during insertion, while the aerogel matrix maintains the thermal insulation function.
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 TBC ensures consistent thermal insulation, reduces battery size and weight, and prevents short circuits, enhancing battery performance and reliability.
Implementation Method 1
The TBC is a thermal insulator and is reinforced with ceramic fibers and particles. The TBC comprises an aerogel material.
Implementation Method 2
The TBC is a thermal insulator and is reinforced with ceramic fibers and particles.
Data Source
Figure 1A~1B
Figure 2
AI summary
A battery casing includes a battery container and a thermal barrier coating (TBC) disposed onto a surface of the battery container. The TBC is a thermal insulator.