Battery Module Venting Structure to Block Cell-to-Cell Gas Transfer
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Solution Overview
Problem
Existing battery modules and packs face inefficiencies in venting gas generated during operation, which can lead to issues such as gas transmission between cells and potential safety hazards.
Innovation Solution
A battery module design featuring a blocking member with a protruding region connected to a busbar assembly, which faces the electrode lead and terrace region, and a housing with venting holes, to manage and discharge venting gas effectively, while maintaining electrical insulation and preventing gas transmission between cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If gas venting is allowed during battery operation, then gas pressure is relieved, but gas may transmit between cells causing safety hazards
Solution Approach 1:
The housing is divided into multiple independent cell accommodating regions separated by partition walls. Each region contains battery cells that can vent gas independently through各自的 venting holes, preventing gas transmission between cells while maintaining pressure relief functionality.
Solution Approach 2:
Blocking members are introduced as intermediary components between adjacent battery cells. These blocking members extend from partition walls into the cell accommodating regions to physically block gas transmission paths while allowing each cell to maintain its own venting capability through dedicated venting holes.
2Reliability
If blocking members are added to prevent gas transmission, then safety is improved, but device complexity increases
Solution Approach 1:
The blocking members are integrated with the existing partition wall structure of the housing. The blocking members extend from the partition walls, combining the partitioning function with the gas blocking function into a unified structural system, thereby reducing overall complexity.
Solution Approach 2:
The partition walls serve multiple functions: they provide structural support for the housing, separate adjacent cell accommodating regions, and serve as mounting bases for the blocking members. This multi-functionality reduces the need for additional separate components.
Data Source
AI summary
A battery module according to an embodiment of the present disclosure may include: at least one battery cell in which at least one electrode lead thereof is exposed to the outside of an outer material including an electrode assembly accommodating region and a terrace region; at least one busbar assembly connected to the at least one electrode lead; a housing accommodating the plurality of battery cells and the at least one busbar assembly; and at least one blocking member disposed to face at least one of the at least one electrode lead or the terrace region.