Battery Housing Venting Passages for Flame Isolation Between Cell Assemblies
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Solution Overview
Problem
Conventional battery devices are prone to secondary ignition or explosion due to heat or flame transfer between adjacent cell stacks, posing a safety risk in applications like electric vehicles and renewable energy systems.
Innovation Solution
A battery device design featuring a housing with strategically placed venting passages and a gas discharge system that separates and directs explosive by-products away from other cell assemblies, using materials like steel or stainless steel for durability and incorporating a fireproof member to mitigate flame propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cell stacks are arranged closely to increase energy density, then productivity and space utilization are improved, but heat and flame can easily transfer to adjacent cell stacks causing secondary ignition or explosion
Solution Approach 1:
The housing is divided into multiple compartments by partition walls, with each compartment accommodating a cell stack. This segmentation physically isolates heat and flame within each compartment, preventing transfer to adjacent cell stacks while maintaining close arrangement for high energy density.
Solution Approach 2:
Heat-resistant materials (such as ceramic coatings or fireproof compounds) are applied to the housing and partition walls as intermediary protective layers between cell stacks. These materials resist heat transfer and prevent flame propagation, allowing close spacing of cell stacks without compromising safety.
2Reliability
If venting passages are added to prevent flame propagation, then safety is improved, but device complexity increases
Solution Approach 1:
The housing serves multiple functions: it provides structural support, acts as a thermal barrier, creates compartmentalization through partition walls, and incorporates venting passages for pressure relief. By integrating these functions into a single component, the design avoids additional separate parts, thereby limiting the increase in device complexity.
Solution Approach 2:
The partition walls and venting passages are integrated into the housing structure itself rather than being separate components. This merging of functions reduces the number of parts and simplifies manufacturing while maintaining safety through effective flame and heat containment.
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 design effectively prevents rapid flame and heat propagation, minimizing secondary damage and enhancing safety by ensuring that explosive by-products are discharged externally, thereby reducing the risk of further ignition or explosion within the battery device.
Implementation Method 1
a first venting passage may be formed in the housing facing the upper surfaces of the plurality of cell assemblies, and a second venting passage may be formed in a space between first side surfaces of the plurality of cell assemblies and the housing
Data Source
AI summary
A battery device is disclosed, the battery device may include a plurality of cell assemblies including a plurality of battery cells; and a housing accommodating the plurality of cell assemblies therein, wherein upper surfaces of the plurality of cell assemblies may be spaced apart from the housing by a certain distance, a first venting passage may be formed in the housing facing the upper surfaces of the plurality of cell assemblies, and a second venting passage may be formed in a space between first side surfaces of the plurality of cell assemblies and the housing.