Battery Module Cover Slope and Ribs for Gas Exhaust
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Solution Overview
Problem
Existing high-power battery modules with non-aqueous electrolytes face challenges in effectively controlling gas generated from multiple battery cells, leading to potential gas leaks and reduced sealing efficiency due to material differences and heat generation during charging/discharging.
Innovation Solution
A battery module design featuring a cover with a sloping top surface and ribs to create a gas flow path, combined with an insulating member made of heat-resistant material, ensures effective gas exhaust and sealing by forming a hexahedral structure with a gas outlet and rib configuration that compensates for the slope, maintaining a flat overall shape for easy module coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a cover is provided to cover vent portions of battery cells, then gas exhaust function is improved, but sealing efficiency deteriorates due to material differences and heat generation
Solution Approach 1:
An insulating member is introduced as an intermediary component between the cover and the battery cells. This insulating member serves as a mediator that maintains sealing efficiency while allowing the cover to perform its gas exhaust function, resolving the contradiction between gas exhaust efficiency and sealing efficiency caused by direct contact between dissimilar materials under thermal stress.
2Object-generated harmful factors
If the cover has a sloped top surface to facilitate gas flow, then gas exhaust efficiency is improved, but manufacturing complexity increases due to rib configuration requirements
Solution Approach 1:
The cover is designed with a sloped top surface that provides curvature to facilitate gas flow toward the gas outlet. This curved geometry improves gas exhaust efficiency by directing gas flow along the slope, while the associated ribs are configured to complement this slope, creating an integrated structure that manages the manufacturing complexity through unified design.
Solution Approach 2:
The cover structure is segmented into functional zones: a sloped top surface for gas flow direction, ribs for structural support and slope compensation, and a gas outlet region. This segmentation allows each component to be optimized for its specific function while maintaining overall manufacturability through modular design principles.
3Strength
If ribs are added to compensate for the slope, then structural integrity is improved, but device complexity increases
Solution Approach 1:
The ribs on the cover serve multiple functions simultaneously: they provide structural support to maintain cover integrity, compensates for the sloped surface geometry, and help direct gas flow. This multi-functionality reduces the need for additional separate components, thereby managing device complexity while improving structural integrity.
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 solution enables efficient and rapid gas exhaust while maintaining a flat module structure for easy coupling, enhancing sealing properties and preventing gas leaks, thus improving the productivity and control of gas management in high-power battery modules.
Implementation Method 1
an insulating member made of heat-resistant material
Implementation Method 2
a top surface having a gradually decreasing slope from the first end of the cover to a second end of the cover
Data Source
AI summary
A battery module includes a plurality of battery cells aligned in one direction, each battery cell having a vent portion, and a cover covering the vent portions of the battery cells, the cover including a gas outlet at a first end of the cover, and a top surface having a gradually decreasing slope from the first end of the cover to a second end of the cover opposite the first end.