Battery Cell Barrier Laminate for Heat and Flame Shielding
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Solution Overview
Problem
Existing battery components fail to prevent chain explosions due to thermal runaway and ignition, as they do not adequately address the expansion and contraction of batteries while providing sufficient heat and flame shielding.
Innovation Solution
A laminate structure comprising multiple layers of resin and fiber, with specific properties to prevent flame penetration and maintain elasticity, ensuring high heat and flame shielding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rigid heat insulating materials are used, then heat shielding performance is improved, but elasticity to follow battery expansion and contraction is reduced
Solution Approach 1:
The patent applies local quality by assigning different functional properties to different layers: the resin layers provide elasticity and flexibility to accommodate battery expansion and contraction, while the inorganic fiber layers provide rigid heat shielding. This spatial distribution of properties allows the composite structure to simultaneously achieve both adaptability and heat protection.
Solution Approach 2:
The combination of resin and inorganic fibers creates a composite material that exhibits both elastic behavior from the polymer matrix and thermal shielding from the inorganic components, resolving the contradiction between rigidity and flexibility.
2Productivity
If dense packaging of batteries is implemented, then driving range is improved, but risk of chain explosion increases due to insufficient flame shielding
Solution Approach 1:
The patent introduces a laminated protective sheet as an intermediary barrier between adjacent battery cells. This intermediate layer acts as a flame retardant shield that prevents direct flame contact and heat transfer between cells, thereby preventing chain explosion while allowing dense packaging configuration.
Solution Approach 2:
The flame-retardant composite material combines the flame resistance of inorganic fibers with the protective properties of resin to create an effective barrier that blocks flame propagation in the event of thermal runaway.
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 laminate effectively blocks heat and flame transfer between adjacent battery cells, preventing chain explosions during thermal runaway and ignition.
Implementation Method 1
the B layer has a stress at 20% compression of 0.01 MPa or more and 5.00 MPa or less in a compression test
Implementation Method 2
the laminate having no flame penetration in two-minute exposure to burner flame... excels in heat shielding performance
Data Source
AI summary
The present invention provides a laminate that excels in elasticity as well as in both heat shielding performance and flame shielding performance in combustion and, in particular, is capable of blocking heat and flame transfer to adjacent battery cells to prevent chain explosion in the event of ignition or thermal runaway, when it is used as an inter-cell member for in-vehicle batteries. The laminate of the present invention includes an A layer including a resin and a fiber and a B layer, the laminate including a total of three or more layers of the A layer and the B layer, the laminate having no flame penetration in two-minute exposure to burner flame and being rated as V-0 or greater in a UL94 burning test.