Battery Pack Sidewall Venting for High-Temperature Gas Discharge
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Solution Overview
Problem
Conventional battery packs face issues with the collapse of internal structures due to high-temperature gases generated during charging and discharging, which can lead to heat accumulation, deterioration, and potential ignition or explosion, despite having gas flow paths that often melt or collapse under high temperatures.
Innovation Solution
The battery pack incorporates a protective layer made of insulating material or flame retardant on gas flow paths and auxiliary paths within the pack case to prevent structural collapse, allowing efficient discharge of high-temperature gases through multiple channels with discharge holes to the exterior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a gas flow path is provided to discharge high-temperature gas, then gas discharge capability is improved, but the gas flow path melts or collapses due to high temperature
Solution Approach 1:
The patent introduces an insulating material as an intermediary substance between the high-temperature gas and the gas flow path structure. This mediator prevents direct thermal contact, allowing the gas to be discharged while the structural components remain protected from thermal damage and maintain their integrity.
Solution Approach 2:
The patent employs a sacrificial insulating layer that can be replaced if damaged. This disposable protective element absorbs the thermal stress and damage from high-temperature gases, protecting the more valuable and permanent structural components of the battery pack.
2Productivity
If high-temperature gases are not effectively removed, then heat accumulation occurs accelerating deterioration, but providing gas flow paths causes structural collapse
Solution Approach 1:
The patent applies insulating materials specifically at critical locations where the gas flow path is most vulnerable to thermal damage. Rather than uniformly protecting the entire structure, the insulating material is strategically placed at the gas flow path and adjacent structural components, providing localized protection where it is most needed while maintaining overall structural strength.
Solution Approach 2:
The patent creates a composite protective structure by combining the gas flow path with insulating materials. This composite construction allows the system to simultaneously achieve effective gas discharge functionality and thermal protection, as the insulating material and structural component work together as an integrated unit.
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 solution enhances stability by preventing the collapse of the internal structure and ensuring effective discharge of high-temperature gases, thereby reducing the risk of deterioration and explosion.
Implementation Method 1
the passages through which the gas flows are provided with an insulating material or flame retardant to prevent the internal structure from collapsing due to high-temperature gases
Data Source
AI summary
A battery pack for housing a plurality of cell assemblies includes a pack case providing a space for a cell assembly to be seated. The pack case includes: a base plate supporting the lower part of a cell assembly; and a hollow-structured side wall coupled along a border of the base plate to support a side part of the cell assembly. The side wall includes: a gas flow path through which gas can move therein; and a through-hole formed on the gas flow path such that the gas flow path communicates with a space in the pack case, the side wall being coated with a protective layer including at least one among an insulating material and a flame retardant on the inside.