Ceramic-Forming Silicone Laminate for Battery Fire Cushioning
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Solution Overview
Problem
Conventional cushioning materials for batteries lack sufficient fire resistance and compressive resistance, particularly in preventing deformation during abnormal heat generation.
Innovation Solution
A silicone laminate composed of layers of high hardness silicone rubber and lower hardness silicone sponge or gel layers, both convertible to ceramic upon burning, providing fire resistance and compressive strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cushioning materials are used in batteries, then the battery structure can be simple and easy to manufacture, but the fire resistance and compressive resistance are insufficient
Solution Approach 1:
The invention uses a composite material consisting of silicone rubber and ceramic particles. The ceramic particles are dispersed within the silicone rubber matrix to form a composite cushioning material that combines the flexibility of silicone rubber with the fire resistance and compressive strength of ceramic, thereby achieving high reliability without excessive structural complexity
Solution Approach 2:
The invention modifies the physical and chemical parameters of the cushioning material by incorporating ceramic particles with specific properties (high melting point, high compressive strength) into the silicone rubber matrix. This changes the material's fire resistance temperature threshold and compressive modulus, enabling it to maintain structural integrity under abnormal heat conditions while preserving cushioning functionality
2Reliability
If a single-layer cushioning material is used, then the manufacturing process is simple, but the balance between softness for cushioning and hardness for fire resistance is difficult to achieve
Solution Approach 1:
By adjusting the concentration, size distribution, and type of ceramic particles in the silicone rubber matrix, the invention optimizes the balance between softness and fire resistance. The ceramic content and particle characteristics are tuned to provide adequate fire protection while maintaining the material's cushioning softness, eliminating the need for complex multi-layer structures
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 silicone laminate achieves high fire resistance and compressive resistance, preventing deformation and damage to battery cells during abnormal heat events, while maintaining thermal insulation properties.
Implementation Method 1
Both the silicone rubber layer (A) and the silicone layer (B) are made of a material that is converted to ceramic and forms a sintered body when burned
Implementation Method 2
converted to ceramic and forms a sintered body when burned
Implementation Method 3
The silicone laminate with these properties can prevent deformation even if a battery generates heat abnormally
Data Source
AI summary
A silicone laminate 1 includes layers of a silicone rubber layer (A) 2 and a silicone layer (B) 3 with a lower hardness than the silicone rubber layer (A) 2. The silicone layer (B) 3 is at least one layer selected from the group consisting of a silicone sponge layer (B1) and a silicone gel layer (B2). Both the silicone rubber layer (A) 2 and the silicone layer (B) 3 are made of a material that is converted to ceramic and forms a sintered body when burned, so that the material retains its shape. The silicone laminate 1 is fire resistant. It is preferable that the silicone rubber layer (A) 2 and the silicone layer (B) 3 are alternately stacked, and that the number of layers is two or more for each of the layers (A) and (B), and four or more in total. Thus, the silicone laminate has high fire resistance and high compressive resistance as a cushioning material for batteries.