Battery Pack Degassing Vent Assembly for Pressure-Triggered Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs with more aggressive cell chemistries face increased thermal event risks, leading to safety concerns and complex, voluminous designs that are costly to manufacture.
Innovation Solution
A degassing vent assembly comprising a protection sheet, support wall, and holding member that seals the battery pack from external substances while allowing pressure relief during thermal events, using a flexible membrane and robust support structure to manage internal pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex and voluminous battery pack designs are used to protect against thermal events and external substances, then safety and protection are improved, but device complexity and size increase
Solution Approach 1:
The patent merges the protection sheet and support wall into a single integrated assembly where the support wall is formed as an integral part of the protection sheet structure. This integration reduces device complexity by eliminating separate components while maintaining the dual functionality of protection against external substances and structural support during thermal events.
Solution Approach 2:
The protection sheet serves multiple functions simultaneously: it acts as a barrier against external substances (water, dust), provides structural support during thermal events, and enables selective degassing through its permeable properties. This multi-functionality reduces the need for additional protective components, thereby reducing overall device complexity.
2Reliability
If complex and voluminous battery pack designs are used to protect against thermal events and external substances, then safety and protection are improved, but manufacturing cost increases
Solution Approach 1:
By combining the protection sheet and support wall into a single integrated component, the manufacturing process is simplified. Instead of assembling multiple separate parts, the integrated design allows for single-step fabrication or pre-assembly, reducing labor costs and manufacturing complexity while maintaining safety functionality.
Solution Approach 2:
The multi-functional protection sheet eliminates the need for multiple separate protective components, reducing the total number of parts that need to be manufactured and assembled. This reduction in component count directly lowers manufacturing costs while maintaining comprehensive protection against thermal events and external substances.
3Strength
If the protection sheet covers the opening of the support wall, then resistance to high pressure and external substances is improved, but device size increases
Solution Approach 1:
The protection sheet is designed as a thin, flexible membrane that can cover the support wall opening effectively. This thin-film approach provides adequate pressure resistance and protection against external substances while minimizing the additional volume introduced by the protective covering.
Solution Approach 2:
The integration of the support wall as an integral part of the protection sheet structure eliminates the need for separate mounting hardware and spacing components, thereby reducing the overall size of the assembly while maintaining pressure resistance capability.
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 assembly reduces complexity and size while enhancing safety by sealing against external substances and selectively releasing gases and particles during thermal events, maintaining durability and reliability.
Implementation Method 1
the protection sheet is configured to withstand a predefined internal pressure in the interior caused by a thermal event occurring in the battery pack. The protection sheet may be configured to break or rupture, in case the internal pressure or force in the interior exceeds the predefined internal pressure threshold
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The disclosure relates to a degassing vent assembly (18) for a battery pack (12) of a vehicle. The degassing vent assembly (18) comprises a protection sheet (24), a support wall (26), and a holding member (30). The protection sheet (24) is configured for covering a vent (16) of the battery pack (12). The support wall (26) comprises at least one opening (28). The protection sheet (24) covers the at least one opening (28). The holding member (30) is configured for holding the protection sheet (24) against the support wall (26). The holding member (30) and the protection sheet (24) are arranged on opposite sides of the protection sheet (24). Additionally, a battery pack (12) for a vehicle is described. Furthermore, a method for mounting a degassing vent assembly (18) on a battery pack (12) for a vehicle is shown. Also, a vehicle is described.