Battery Pack Vent Spout Layout for Directed Byproduct Discharge
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Solution Overview
Problem
Existing battery pack venting systems in electrified vehicles are inefficient in managing vent byproducts, particularly in high-pressure and high-temperature situations, leading to potential damage and release of gases, debris, and particulates without effective containment and directed discharge.
Innovation Solution
A battery pack venting system with primary vents and elevated vent spouts, including collars, that create a pressure differential to facilitate the directed flow and containment of vent byproducts, ensuring efficient discharge through a battery pack vent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional venting systems are used, then the structure is simple, but the venting efficiency is poor and cannot effectively manage high-pressure and high-temperature situations
Solution Approach 1:
The venting system is divided into multiple functional components: primary vents for gas discharge, vent spouts for debris containment, collars for structural support and sealing, and directed flow paths. This segmentation allows each component to specialize in specific venting functions, improving overall reliability while managing complexity through modular design
Solution Approach 2:
The vent spouts extend outward from the primary vent plane, creating a three-dimensional venting structure. This dimensional addition allows the system to contain and direct debris and particulates away from the battery pack while maintaining gas venting capability, thereby improving venting efficiency without excessive complexity
2Speed
If vents are positioned close to the interior, then the venting response is fast, but the discharge of gases and debris cannot be effectively contained and directed
Solution Approach 1:
The vent spouts act as intermediary structures between the primary vents and the external environment. They receive gases and debris from the quickly-responding primary vents and then direct them away from the battery pack, thus maintaining fast response while eliminating harmful debris release
Solution Approach 2:
The harmful debris and particulates are extracted from the main venting flow by the vent spouts, which are positioned to capture and contain these materials separately from the gas discharge path. This extraction allows fast gas venting while preventing debris damage
3Reliability
If vent outlets are at the same level, then the structure is simple, but the directed flow and containment of vent byproducts is ineffective
Solution Approach 1:
The vent spouts are positioned asymmetrically relative to the primary vents, extending outward at different locations and angles. This asymmetric configuration creates effective directed flow patterns that contain and redirect vent byproducts, improving containment reliability while adding only moderate structural complexity
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 system effectively manages vent byproducts by creating a pressure differential to draw and direct gases, debris, and particulates away from the battery cells, preventing damage and ensuring safe discharge outside the battery pack.
Implementation Method 1
create a pressure differential to facilitate the directed flow and containment of vent byproducts
Data Source
AI summary
A battery pack venting system includes a cell stack including battery cells disposed along a cell stack axis, and an enclosure assembly providing an interior that houses the cell stack. The enclosure assembly has a first enclosure wall and a plurality of second enclosure walls. The system further includes one or more primary vents in the first enclosure wall, and one or more vent spouts in the first enclosure wall.