Battery Module Waterproofing Structure for Coolant Leak Isolation
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Solution Overview
Problem
Existing secondary battery modules face issues with coolant leakage, leading to damage of battery cells due to the use of rubber packings that are damaged by vacuum or high pressure, resulting in ineffective waterproofing.
Innovation Solution
A secondary battery module design featuring a frame member that divides cells into regions, a cover with inlet and outlet for coolant flow, and a water proofing structure including protrusion members, tubing members, and waterproofing resin to prevent coolant leakage and enhance waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber packing is used for waterproofing, then sealing function is improved, but reliability deteriorates due to damage from vacuum or high pressure
Solution Approach 1:
The patent removes the rubber packing component entirely and replaces it with an integrated waterproofing structure formed directly on the battery cell surface. This eliminates the interface between rubber packing and frame that is vulnerable to vacuum and high pressure damage, while maintaining effective sealing through the integrated structure.
Solution Approach 2:
The patent applies a waterproofing structure comprising a waterproofing resin coating over a protrusion member, creating a composite structure that combines mechanical support with sealing functionality. This composite approach provides both structural integrity and reliable waterproofing that resists vacuum and high pressure.
2Reliability
If protrusion member and tubing member are added for waterproofing, then waterproofing performance is improved, but device complexity increases
Solution Approach 1:
The patent merges the protrusion member and tubing member into a single integrated waterproofing structure that is formed directly on the battery cell. This integration maintains the functional benefits of both components (protrusion for sealing, tubing for reinforcement) while eliminating the complexity of separate assembly steps and multiple discrete parts.
Solution Approach 2:
The waterproofing structure is formed preliminarily during battery cell manufacturing, before assembly into the module. The protrusion member and tubing member are created as integral features of the cell structure itself, eliminating subsequent assembly complexity while ensuring proper positioning and sealing.
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 effectively prevents coolant leakage and cell damage, maintains waterproofing under vacuum or high pressure, and enhances cooling performance while preventing flame spread and improving structural rigidity.
Implementation Method 1
the tubing member may be thermally contracted after surrounding the secondary battery cell and the protrusion member
Data Source
AI summary
Disclosed is a secondary battery module, and a secondary battery pack and a vehicle including the same. The secondary battery module includes a plurality of secondary battery cells; a frame member coupled to the plurality of secondary battery cells to support the plurality of secondary battery cells and configured to divide the plurality of secondary battery cells into a first region and a second region by the coupling; and a cover configured to accommodate the plurality of secondary battery cells and the frame member, wherein the plurality of secondary battery cells have a water proofing structure, and wherein the water proofing structure prevents a coolant of the first region from flowing to the second region.