Battery Module Protrusion Venting for Thermal Event Gas Discharge
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Solution Overview
Problem
Existing battery packs face challenges in securely discharging high-temperature venting gas and heat generated during thermal events, which can lead to safety issues such as explosions or fires if not properly vented.
Innovation Solution
A battery pack design featuring a protrusion part on the battery module that protrudes upward, creating a venting space with a venting part and a heat-resistant sheet, allowing safe discharge of high-temperature gases and heat through a venting mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a battery module is hermetically enclosed in a battery pack, then protection from external environment is improved, but venting space for thermal event discharge is reduced
Solution Approach 1:
The battery pack is divided into multiple compartments including a venting space separated from the battery module by a partition wall. This segmentation allows the hermetic enclosure to protect batteries while providing a dedicated space for thermal event discharge.
Solution Approach 2:
A partition wall acts as an intermediary structure between the battery module and the venting space. It separates the hermetically enclosed battery compartment from the venting area, allowing both functions to coexist without compromising either protection or venting capability.
2Ease of manufacture
If the battery pack structure is simplified, then manufacturing cost is reduced, but venting space securing capability is worsened
Solution Approach 1:
The protrusion part serves multiple functions: it defines the venting space boundary, provides structural support for the partition wall, and guides the venting path. This multi-functionality reduces the need for additional components, simplifying manufacturing while maintaining venting capability.
Solution Approach 2:
The venting space is created by utilizing the vertical dimension through the protrusion part extending upward from the battery module. This dimensional approach creates venting volume without increasing the horizontal footprint, simplifying the overall pack design.
Data Source
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AI summary
A battery pack according to certain embodiments of the present disclosure comprises: at least one battery module including a plurality of battery cells; a pack frame that is opened at its upper part and houses at least one of the battery modules; and a pack cover that covers the opened upper part of the pack frame; wherein a venting part for discharging a venting gas is formed on an upper surface of the battery module, and wherein the battery module includes a protrusion part that protrudes upward from the upper surface of the battery module.