Secondary Battery Module Housing for Swelling Pressure Dispersion
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Solution Overview
Problem
Existing secondary battery modules suffer from inefficient pressure dispersion during swelling, leading to increased deformation and risk of damage at the ends of the batteries due to concentrated pressure on the housing, particularly affecting the outermost batteries.
Innovation Solution
A secondary battery module design with ribs inside the housing edges and elastic pads between the batteries and sidewalls to disperse pressure and support the ends, combined with a resin application for fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a pad made of elastic material is mounted between the inner wall and the outermost shell of the housing to buffer external impact, then the housing can absorb external impacts, but the pressure is concentrated only into a central portion of the inner wall causing compression while both ends are not supported
Solution Approach 1:
The single central pad is divided into multiple pads positioned at different locations (central pad and end pads) along the longitudinal direction. This segmentation allows pressure to be distributed across multiple contact points rather than concentrated at one location, resolving the contradiction between impact buffering and pressure distribution uniformity.
Solution Approach 2:
Different pads are positioned at different locations with different functions: the central pad handles general impact buffering while end pads specifically support the upper and lower ends of secondary batteries. This local differentiation ensures that each region of the housing receives appropriate pressure distribution tailored to its specific structural needs.
2Reliability
If the volume of each secondary battery is expanded due to swelling, then the secondary battery can accommodate gas generation from side reactions, but the secondary battery placed at the outermost side is more greatly deformed
Solution Approach 1:
End pads are specifically positioned at the upper and lower ends of the housing to provide localized support to the outermost secondary batteries. This local reinforcement prevents excessive deformation at the outermost positions while allowing controlled swelling, resolving the contradiction between swelling tolerance and shape maintenance.
Solution Approach 2:
The end pads are pre-positioned to provide cushioning support before swelling occurs. When the outermost secondary batteries swell, the end pads are already in place to buffer the expansion and prevent deformation, rather than reacting after damage occurs.
3Device complexity
If the pressure acting on the housing is not dispersed, then the housing structure can maintain simple design, but the deformation of the housing is relatively larger and both ends are not efficiently supported
Solution Approach 1:
The housing structure is segmented by adding end pads at specific locations rather than redesigning the entire housing. This minimal segmentation approach maintains overall structural simplicity while effectively dispersing pressure through multiple contact points, resolving the contradiction between simplicity and deformation control.
4Stability of the object's composition
If the secondary battery moves in a state of being in close contact with the housing, then the secondary battery can be securely positioned, but friction occurs on the contact surface causing risk of tearing or damage
Solution Approach 1:
End pads act as intermediary elements between the secondary batteries and the housing inner wall. These pads provide a soft contact surface that reduces friction compared to direct contact with the rigid housing, while still maintaining secure positioning. The intermediary pads prevent tearing and damage while ensuring stability.
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 disperses pressure, reduces deformation, and prevents damage to the battery ends, maintaining structural integrity and cooling efficiency.
Implementation Method 1
a pad 3 made of an elastic material to buffer an external impact is mounted between an inner wall and the outermost shell of the housing 2
Data Source
AI summary
A secondary battery includes a plurality of secondary batteries, each secondary battery having two side surfaces that are flat and parallel to each other; and a housing having a bottom part formed in a horizontal direction, two vertical sidewalls extending parallel to each other in a longitudinal direction at opposite ends of the bottom part, and a ceiling part extending from an upper end of each of the sidewalls and disposed parallel to the bottom part. The plurality of secondary batteries are mounted to be stacked in a thickness direction thereof so that side surfaces of outermost secondary batteries of the plurality of secondary batteries face respective sidewalls. A rib is formed inside each of edges connecting the bottom part and the sidewalls of the housing to each other to have a thickness thicker than other portions of the sidewalls.