Battery Pack Case Beam Structure for Vibration-Sealed Mounting
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Solution Overview
Problem
The point suspension structure in battery pack cases is prone to cracking due to vibrations, leading to reduced airtightness and potential liquid ingress, as the welded seams at the suspension points are vulnerable to impact.
Innovation Solution
A battery pack case design featuring a beam with a first chamber that penetrates through it, a connection column that passes through the beam's side wall, and blocking portions on the chamber's sides to prevent external liquid entry, while also reducing weight and enhancing stability and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a point suspension structure with welded seams is used to fix the battery pack case to the vehicle, then the battery pack can be securely mounted, but the welded seams at the suspension points are vulnerable to cracking under vibration and impact
Solution Approach 1:
The patent divides the suspension structure into multiple segments: the connection column is separated from the beam (which has the first chamber), and the blocking portions are separated from the beam walls. This segmentation allows each component to perform its specific function independently, reducing stress concentration at welded joints and improving overall reliability under vibration.
Solution Approach 2:
The patent employs a composite structure combining the beam (with first chamber), connection column, and blocking portions to create a multi-functional suspension system. This composite design distributes mechanical stresses across different components and materials, enhancing both strength and resistance to vibration-induced cracking.
2Reliability
If the battery pack case structure is reinforced to improve airtightness and prevent liquid ingress, then sealing performance improves, but the weight of the battery pack case increases
Solution Approach 1:
The patent segments the sealing function into distinct components: the first chamber in the beam, the connection column with specific positioning, and the blocking portions at the chamber ends. This segmentation achieves effective liquid and air barrier protection without requiring excessive material, thereby controlling weight while maintaining reliability.
3Reliability
If a beam with a penetrating first chamber and blocking portions is introduced to prevent liquid entry, then airtightness and liquid ingress prevention improve, but the device complexity increases
Solution Approach 1:
The beam structure serves multiple functions simultaneously: it provides structural support for the battery pack case, contains the first chamber for liquid barrier protection, and integrates the blocking portions to prevent liquid ingress through the chamber. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved sealing performance.
Data Source
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AI summary
A battery pack case and a vehicle having the battery pack case are provided. The battery pack case includes a beam (20) disposed in the battery pack case (10) and a connection column (30) connected to the beam (20). A first chamber (201) extending in a length direction of the beam is disposed inside the beam (20), and the first chamber (201) penetrates through the beam (20). The connection column (30) penetrates through a side wall of the first chamber (201). In an extending direction of the first chamber (201), two sides of the first chamber (201) located at the connection column (30) are provided with blocking portions (40).