VENTILATION OF PRISMATIC BATTERY CELLS

The prismatic battery cell design with temperature/pressure-activated ventilation through hard soldering materials addresses the challenge of limited ventilation, enhancing safety by rapid gas release and energy dissipation during thermal events.

DE102024121101A1Pending Publication Date: 2025-01-30GM GLOBAL TECHNOLOGY OPERATIONS LLC
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Patent Information

Application Number
DE102024121101
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-07-25
Filing Date
2024-07-24
Publication Date
2025-01-30

AI Technical Summary

Technical Problem

Existing prismatic battery cells face challenges in efficiently releasing gases and managing thermal runaway due to limited ventilation areas, which can lead to pressure buildup, cell damage, and potential thermal propagation to neighboring cells.

Method used

The implementation of a prismatic battery cell design featuring a lid and/or floor section connected with hard soldering materials, such as laser-welded or crimped connections, that separate at predetermined temperatures or pressures to create larger ventilation areas, allowing for rapid gas release and energy dissipation during thermal events.

Benefits of technology

This design effectively manages thermal runaway by rapidly releasing gases and energy, reducing the risk of cell damage and thermal propagation, ensuring safer operation of battery packs.

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Abstract

A battery cell comprises a battery cell stack comprising A anode electrodes, C cathode electrodes, and S separators, where A, C, and S are integers greater than one. A housing configured to receive the battery cell stack comprises a can body defining a first opening and a second opening at opposite ends of the can body; a lid section connected to the first opening of the can body by a first brazed filler material located between the lid section and the can body, having a first melting temperature; and a bottom section connected to the second opening of the can body.
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