Battery Module Housing With Deformable Sections for Cell Swelling
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Solution Overview
Problem
Conventional battery modules face challenges in managing the expansion of battery cells due to factors like rapid charging, overcharging, over-discharging, short circuits, and high temperatures, which can lead to increased pressure and accelerated deterioration of the battery cells.
Innovation Solution
The battery module incorporates a housing with deformable portions, such as thickness deformable, cut deformable, and curved deformable portions, which allow the housing to accommodate the expansion of battery cells without applying excessive pressure, thereby reducing stress and deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a housing structure is installed to surround the battery cell and apply surface pressure, then the battery module maintains its durability and structural stability, but when the battery cell expands due to swelling phenomenon, the pressure between the battery cell and housing continues to increase, which accelerates deterioration of the battery cell
Solution Approach 1:
The housing structure transitions from a rigid fixed form to a dynamic adjustable form through the introduction of the deformable portion. When the battery cell expands, the deformable portion allows the housing to adjust its shape and reduce pressure, preventing damage while maintaining structural integrity during normal operation.
Solution Approach 2:
The housing structure's physical parameters (shape, volume, pressure distribution) are made changeable through the deformable portion. This allows the housing to adapt its pressure application to the battery cell's state, maintaining optimal pressure for stability while reducing pressure when expansion occurs.
2Stability of the object's composition
If a rigid housing structure is used to maintain structural stability, then the housing can support and protect the battery cells, but it cannot accommodate the expansion of battery cells without applying excessive pressure
Solution Approach 1:
The housing incorporates a deformable portion that enables dynamic adaptation to battery cell expansion while maintaining overall structural stability. The deformable portion acts as a buffer zone that can change shape without compromising the housing's protective function.
Solution Approach 2:
The housing is divided into rigid portions and a deformable portion, allowing different parts to serve different functions. The rigid portions maintain structural stability while the deformable portion accommodates battery cell expansion.
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 deformable housing design effectively alleviates stress caused by battery cell expansion, enhancing the durability and longevity of the battery module by reducing pressure-related deterioration.
Implementation Method 1
a thickness deformable portion that is formed in the housing and is deformable due to a thickness difference when the case expands
Implementation Method 2
a cut deformable portion that is formed in the housing and is deformable as a part of the housing is cut when the case expands
Implementation Method 3
a curved deformable portion that is formed in the housing and is deformable due to a curved shape when the case expands
Data Source
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AI summary
Disclosed herein is a battery module, and is directed to providing a battery module capable of safely accommodating a case by providing expandability to a housing. To this end, the present disclosure provides a battery module including a case in which one or more electrode assemblies each including a positive electrode and a negative electrode are embedded, a cap cover configured to cover an open region of the case, a terminal assembled to the cap cover through the cap cover and connected to the electrode assembly, a housing configured to accommodate the cases arranged in a row, and a thickness deformable portion that is formed in the housing and is deformable due to a thickness difference when the case expands.