EV Battery Enclosure Sealant Height Control
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Solution Overview
Problem
Existing electric vehicle battery enclosures face challenges in providing a cost-effective and reliable sealing solution that maintains a uniform seal bead height to protect batteries from debris and contain heat and gases.
Innovation Solution
An electric vehicle battery enclosure design featuring a base and cover portion with strategically placed tabs and a sealant, such as urethane or room-temperature-vulcanizing silicone, to ensure a uniform sealant height around the perimeter, using fasteners to secure the cover portion and maintain a consistent seal bead height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fasteners and rubber strip-type seals are used, then the enclosure can be assembled, but the sealing reliability and uniformity of seal bead height are insufficient
Solution Approach 1:
The cover portion includes tabs with openings positioned at predetermined locations around the perimeter. These tabs are prepared in advance during manufacturing, and when assembled with the base portion, they automatically establish the correct seal bead height and uniformity before the sealing process occurs, eliminating the need for post-assembly adjustments.
Solution Approach 2:
The tabs act as intermediary elements between the cover portion and base portion. They provide a mechanical interface that maintains the precise spacing and alignment needed for uniform seal bead height, while also serving as attachment points for fasteners to secure the enclosure assembly.
2Object-affected harmful factors
If a sealed enclosure is created to protect batteries, then battery protection is improved, but the complexity of the enclosure structure increases
Solution Approach 1:
The sealing function and structural attachment function are merged into a single integrated system. The tabs serve dual purposes: they maintain the precise geometry needed for uniform seal bead height and provide attachment points for fasteners. This consolidation reduces the number of separate components needed and simplifies the overall enclosure structure while maintaining effective sealing.
3Reliability
If sealant is applied around the entire perimeter, then sealing coverage is improved, but the cost of materials and application complexity increases
Solution Approach 1:
The tabs are pre-positioned on the cover portion at predetermined locations around the perimeter. This preliminary arrangement creates a template that guides the sealant application process, ensuring that sealant is applied at the correct locations and in the correct amounts. The tabs serve as physical references that simplify the manufacturing process and reduce application complexity.
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 effectively seals the enclosure uniformly, preventing debris entry and heat/gas containment, while being cost-effective and ensuring the longevity of the batteries by maintaining a consistent sealant height.
Implementation Method 1
a sealant to create a bond between the base portion and the cover portion around an entire perimeter of the enclosure
Data Source
AI summary
Electric vehicle battery enclosures and methods of assembling electric vehicle battery enclosures involve a base portion to hold one or more batteries that provide motive power to an all-electric or hybrid electric vehicle. An electric vehicle battery enclosure includes a cover portion to mate with the base portion to enclose the one or more batteries, and a sealant to create a bond between the base portion and the cover portion around an entire perimeter of the enclosure and to seal the enclosure based on a uniform height of the sealant around the perimeter of the enclosure.