Battery Pack Venting Channel With Chimney Sealing
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Solution Overview
Problem
Existing battery packs face challenges in safely and cost-effectively venting hot gases and particles generated by electrochemical cells without damaging adjacent cells, requiring a robust and reliable configuration.
Innovation Solution
A battery pack design featuring a chimney member and longitudinally extending venting channel that forms a leak-free fluid pathway from each cell's vent opening to an external discharge, using a chimney member and venting channel member attached via a radial sealing interface, with optional features like heat staking and polymer materials for cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a venting system is implemented to discharge hot gases and particles from battery cells, then cell safety is improved, but device complexity increases due to additional components required for sealed pathways
Solution Approach 1:
The chimney member is integrated with the top cover to form a unified venting structure. The sealing element is incorporated into the chimney member itself, combining multiple functions (venting, sealing, and structural support) into a single component, thereby reducing overall system complexity while maintaining safety
Solution Approach 2:
A sealing element is introduced as an intermediary component between the chimney member and the top cover. This sealing element creates a leak-free fluid connection without requiring complex multi-component assemblies, simplifying the venting system while ensuring reliable containment of hot gases and particles
2Reliability
If multiple components are used to create a sealed venting pathway, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The chimney member and top cover are designed as integrated components with the sealing element built into the chimney member. This merging of functions reduces the number of separate parts that need to be manufactured and assembled, lowering manufacturing costs while maintaining the reliability of the sealed venting pathway
Solution Approach 2:
The chimney member incorporates its own sealing mechanism through the integrated sealing element, eliminating the need for separate sealing components or complex assembly procedures. This self-contained design simplifies manufacturing and reduces costs while ensuring reliable sealing performance
3Reliability
If a robust sealed connection is implemented between chimney member and venting channel member, then leak-free performance is improved, but device complexity increases
Solution Approach 1:
A sealing element is used as an intermediary between the chimney member and the venting channel member to create a robust sealed connection. This single intermediary component achieves leak-free performance without requiring complex multi-layer sealing structures or additional fastening mechanisms, thereby maintaining simplicity
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 design ensures safe and reliable ejection of hot gases and particles, reducing the risk of cell damage and requiring fewer parts, thus achieving a robust, cost-effective, and efficient venting system.
Implementation Method 1
a chimney member (4) for the vent opening (12), wherein the chimney member (4) is configured such that it forms a fluid pathway (41) extending in the height direction (H) from the top surface (11) to the longitudinally extending venting channel (VC)
Implementation Method 2
the chimney member (4) and the venting channel member (3) are attached to each other via a radial sealing interface (42)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The disclosure relates to a battery pack (1) comprising a plurality of electrochemical battery cells (10), wherein: - each battery cell (10) comprises a top surface (11) facing upwardly in a height direction (H), wherein the top surface (11) comprises a vent opening (12), - the battery pack (1) comprises a top cover (2), - the battery pack (1) further comprises a venting channel member (3) which is attached to an inside (21) of the top cover (2) such that it forms a longitudinally extending venting channel (VC), - the battery pack (1) further comprises, for at least one battery cell (10) of the plurality of electrochemical battery cells (10), a chimney member (4) for the vent opening (12), wherein the chimney member (4) is configured such that it forms a fluid pathway (41) from the top surface (11) to the longitudinally extending venting channel (VC).