Battery Pack Venting Compartments for Array Thermal Isolation
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Solution Overview
Problem
In traction battery packs, high-temperature vented gases from battery cells can propagate thermal energy to neighboring arrays, causing undesirable heating during venting events.
Innovation Solution
A divider system with non-structural walls, arranged in a grid pattern, creates separate vented gas receiving compartments for each battery array, routing gases into a manifold with a filtration insert to prevent thermal propagation to neighboring arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If battery arrays are arranged in close proximity within the enclosure, then space utilization is improved, but thermal propagation risk increases when venting occurs
Solution Approach 1:
The enclosure is divided into multiple separate vented gas receiving compartments using divider walls, with each compartment associated with a specific battery array. This segmentation prevents thermal propagation between arrays while maintaining compact spacing, as each array's vented gases are contained within its own compartment rather than spreading to neighboring arrays.
2Device complexity
If vented gases are allowed to disperse freely within the enclosure, then device complexity is reduced, but thermal energy propagates to neighboring battery arrays causing undesirable heating
Solution Approach 1:
The enclosure is divided into multiple separate vented gas receiving compartments using divider walls, with each compartment associated with a specific battery array. This segmentation prevents thermal propagation between arrays while maintaining compact spacing, as each array's vented gases are contained within its own compartment rather than spreading to neighboring arrays.
3Device complexity
If a single large vented gas receiving compartment is used for all battery arrays, then device complexity is reduced, but thermal propagation between arrays occurs
Solution Approach 1:
The enclosure is divided into multiple separate vented gas receiving compartments using divider walls, with each compartment associated with a specific battery array. This segmentation prevents thermal propagation between arrays while maintaining compact spacing, as each array's vented gases are contained within its own compartment rather than spreading to neighboring arrays.
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
This solution effectively directs vented gases away from neighboring battery arrays, reducing thermal propagation and maintaining temperature stability within the battery pack.
Implementation Method 1
A traction battery pack of an electrified vehicle can include one or more battery arrays within an enclosure... high-temperature vented gases from battery cells can propagate thermal energy to neighboring arrays, causing undesirable heating during venting events
Implementation Method 2
routing gases into a manifold with a filtration insert to prevent thermal propagation to neighboring arrays
Data Source
AI summary
A traction battery pack venting system includes a plurality of battery arrays within a traction battery pack. The battery arrays each have a plurality of individual battery cells. The system further includes a divider system that provides a plurality of vented gas receiving compartments. Each of the vented gas receiving compartments are separate and distinct from the other vented gas receiving compartments within the plurality of vented gas receiving compartments. Each of the vented gas receiving compartments are associated with one of the battery arrays. Each of the vented gas receiving compartments can be associated with a manifold. The vent gas produced from thermal runaway can be discharged to the vented gas receiving compartments, directed to a manifold, and discharge to the external atmosphere.