Battery Pack Elastic Sealing Structure for Dust Intrusion
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Solution Overview
Problem
Current battery packs have gaps that allow dust and other impurities to enter, affecting their performance and reliability.
Innovation Solution
A battery pack design that includes a shell, a cell assembly, a front cover, and an elastic member, where the elastic member is connected to the shell and the cell assembly, exerting a force that reduces the gap between the shell's walls, thereby minimizing the entry of dust and impurities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery pack structure is simplified without additional components, then the device complexity is reduced, but gaps between components increase allowing dust and impurities to enter
Solution Approach 1:
The elastic member utilizes its own elastic deformation properties to automatically push the bottom wall toward the first connecting wall, closing the gap without requiring external actuators or complex control systems. The structure serves itself by using the inherent properties of the elastic member to maintain sealing.
Solution Approach 2:
The elastic member changes its physical state between deformed and restored positions, utilizing parameter changes in its elastic properties to dynamically adjust the gap between the bottom wall and first connecting wall, thereby preventing dust and impurity entry.
2Object-affected harmful factors
If the elastic member is added to reduce gaps and prevent dust entry, then the protection against impurities is improved, but the device complexity increases
Solution Approach 1:
The elastic member automatically adjusts the gap closure through its elastic properties without requiring external control systems, actuators, or complex mechanisms, thereby minimizing the increase in device complexity while effectively preventing dust and impurity entry.
Solution Approach 2:
The elastic member functions as a flexible component that deforms to push the bottom wall toward the first connecting wall, creating a dynamic seal that prevents dust and impurity entry without requiring rigid complex structures.
3Reliability
If the bottom wall is moved closer to the first connecting wall to reduce gaps, then the sealing performance is improved, but the cell assembly compression increases
Solution Approach 1:
The elastic member provides dynamic adjustment of the bottom wall position, allowing the system to adapt between sealing requirements and cell assembly compression tolerance, optimizing both sealing performance and force distribution.
Solution Approach 2:
The elastic member utilizes parameter changes in its deformation state to control the degree of bottom wall movement, thereby regulating the balance between gap closure for sealing and compression force on the cell assembly.
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 reduces the entry of dust and impurities into the battery pack, enhancing its performance and reliability by minimizing the impact of external contaminants.
Implementation Method 1
the elastic member abuts against the first extension portion, so that a force exerted by the elastic member causes the bottom wall to move closer to the first connecting wall
Data Source
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AI summary
A battery pack (100) includes a shell (10a), a cell assembly (20), a front cover (10b), and an elastic member (30). The cell assembly (20) is disposed in the shell (10a). The front cover (10b) is connected to the shell (10a). The elastic member (30) and the cell assembly (20) are arranged along the first direction (X). along the first direction (X), one side of the elastic member (30) is connected to the shell (10a), and another side of the elastic member (30) is connected to the cell assembly (20). The shell (10a) includes a bottom wall, and the bottom wall (12) supports the cell assembly (20). The bottom wall (12) is provided with a first extension portion (121), the front cover (10b) is provided with a first connecting wall (101b), the first extension portion (121) is connected to the first connecting wall (101b), and the elastic member (30) abuts against the first extension portion (121).