Pouch Cell Battery Pack Venting for Thermal Runaway Containment
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Solution Overview
Problem
Conventional battery packs face issues with energy density, assemblability, coolability, and vulnerability to thermal events, particularly in pouch-type batteries, which are prone to swelling and thermal runaway, leading to potential explosions.
Innovation Solution
A battery pack design that accommodates pouch-type cells directly within a pack case, using a cell cover to surround and support the cells, a bus bar assembly to connect electrodes, and a venting system to manage gas and flame discharge, eliminating the need for additional modules or frames, thereby enhancing stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a battery pack is designed to be easily removable and replaceable by users, then ease of operation is improved, but connection reliability between battery pack and vehicle may deteriorate
Solution Approach 1:
A connection assisting tool serves as an intermediary device between the battery pack and vehicle. This tool includes a connection portion that couples to the battery pack's connection terminal and a vehicle side coupling portion that couples to the vehicle's connection terminal, enabling users to easily connect and disconnect battery packs while maintaining reliable electrical connections through the assisting tool's structured interface
2Adaptability or versatility
If battery packs are frequently removed and reinstalled by users, then adaptability is improved, but connection terminal durability may deteriorate
Solution Approach 1:
The connection assisting tool protects connection terminals by serving as a durable intermediary component that absorbs wear from frequent connections and disconnections. The tool's structured coupling mechanism distributes mechanical stress away from the battery pack's terminal, allowing users to frequently interchange battery packs without degrading the terminals themselves
Solution Approach 2:
The connection assisting tool is pre-assembled with the battery pack before installation in the vehicle. This preliminary assembly ensures proper alignment and reduces mechanical stress on the connection terminal during the actual installation process, thereby preserving terminal durability while enabling frequent battery pack replacements
Data Source
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AI summary
A battery pack of the present disclosure includes a plurality of pouch-type battery cells having a plurality of electrode leads; a pack case accommodating the plurality of pouch-type battery cells in an inner space; a cell cover configured to surround a portion of at least one of the plurality of pouch-type battery cells in an inner space of the pack case; a bus bar assembly configured to connect electrode leads of the wrapped pouch-type battery cell; and an end cover coupled to one side of the bus bar assembly.