Battery Pack Case Flange Structure Against Inward Deformation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery packs face issues with deformation of the upper case due to high internal pressure, leading to potential interference with internal components and increased risk of short circuits.
Innovation Solution
The battery pack design includes a case with a flange portion that has an opposing portion overhanging outwardly from the upper portion of the case body, along with a sealing member to prevent inward deformation of the upper case under increased pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the upper case is made with a simple structure, then the manufacturing cost is reduced, but the upper case deforms inwardly when internal pressure increases
Solution Approach 1:
The flange portion is designed to overhang outwardly from the upper case body, creating a three-dimensional structural feature that prevents inward deformation. This dimensional addition (the overhanging flange) provides structural support without significantly increasing manufacturing complexity, as it can be formed through standard molding or fabrication processes.
2Reliability
If the flange portion is designed with an overhanging structure, then inward deformation of the upper case is suppressed, but the device complexity increases
Solution Approach 1:
The flange portion serves multiple functions: it provides structural support to prevent inward deformation of the upper case, and it serves as the mounting surface for the sealing member. By combining these functions into a single structural feature, the design avoids the need for additional separate components, thereby reducing overall device complexity while maintaining reliability.
3Ease of manufacture
If the end portion is made perpendicular to the opposing portion, then the sealing member can be easily installed, but the height of the battery pack increases
Solution Approach 1:
The end portion is designed with an inclined angle relative to the opposing portion rather than being perpendicular. This parameter change (from 90 degrees to an oblique angle) allows the sealing member to be installed at an angle, maintaining ease of installation while reducing the vertical height requirement of the overall battery pack structure.
Data Source
AI summary
The battery pack comprises: a plurality of batteries; a case having a case body, and a flange portion; and a sealing member; wherein the case comprises: a lower case having an opening formed at an upper end portion; and an upper case covering the opening; wherein the lower case includes a concave lower case body constituting the case body, and a lower flange constituting the flange portion, wherein the upper case includes an upper case body constituting the case body, and an upper flange constituting the flange portion, wherein the lower flange and the upper flange, respectively, include: an end portion in which the sealing member is disposed; and an opposing portion connecting the end portion and the case body, the opposing portion overhanging outwardly from the upper portion, wherein the end portion is inclined with respect to the opposing portion.