Multilayer Micropore Venting in Battery Modules to Prevent Chain Ignition
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Solution Overview
Problem
Conventional battery modules face challenges in controlling the discharge of high-temperature flames during ignition events, leading to potential chain ignition and damage to adjacent modules in battery packs.
Innovation Solution
A battery module design featuring a module frame with a venting structure composed of multiple layers with offset, varying-sized, and differently arranged micropores, which facilitates quick discharge of high-temperature gases while suppressing flames, thereby minimizing damage to adjacent modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a conventional end plate with openings is used to allow gas discharge, then high-temperature gases can be vented, but flames can propagate to adjacent battery modules causing chain ignition
Solution Approach 1:
The venting structure is divided into multiple layers (first layer, second layer, third layer) with micropores at different positions and orientations. This segmentation creates a tortuous path for flame propagation while maintaining gas discharge capability, effectively blocking flames from reaching adjacent modules
Solution Approach 2:
Different layers of the venting structure have different micropore characteristics (size, position, orientation) tailored to specific functions: the first layer blocks large flames, the second layer filters smaller particles, and the third layer provides final filtration. Each layer has locally optimized properties to address specific aspects of flame and gas control
2Reliability
If a multi-layer venting structure with micropores is implemented, then flame suppression is achieved, but the device complexity increases
Solution Approach 1:
The multi-layer venting structure serves multiple functions simultaneously: it vents high-temperature gases, suppresses flames, filters particulate matter, and prevents chain ignition. By integrating these functions into a single structure, the patent avoids the need for separate components for each function, thereby reducing overall system 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 venting structure effectively suppresses flames and prevents chain ignition by rapidly discharging high-temperature gases, reducing the risk of damage to adjacent battery modules and enhancing safety in battery packs.
Implementation Method 1
a first micropore group in which a plurality of micropores are gathered and a second micropore group in which a plurality of micropores are gathered are formed in the perforated plate
Implementation Method 2
the plurality of micropores are formed in each of the plurality of layers
Data Source
AI summary
A battery module includes a battery cell stack in which a plurality of battery cells are stacked and a module frame for housing the battery cell stack. A venting part is formed on at least one surface of the module frame, the venting part includes a plurality of stacked layers, and micropores are formed in each of the plurality of layers.