Battery Module Monoframe and Cushion Bag for Swelling
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Solution Overview
Problem
Conventional battery modules face issues with mechanical performance, such as cell pressing, swelling, and impacts, due to their complex structure and inability to uniformly apply pressure, which can lead to damage and inefficiencies in space usage.
Innovation Solution
A battery module design featuring pouch-type cells and a hollow quadrilateral monoframe with a cushion bag that expands with fluid injection, providing uniform pressure and contact between the cells and the monoframe, eliminating the need for a conventional cell cartridge and foam pad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cell cartridge is used to constrain battery cells, then the battery cells are fixed in position and prevented from moving due to vibration or impacts, but the structure becomes complex and the mechanical performance deteriorates due to non-uniform pressure distribution causing cell pressing and swelling
Solution Approach 1:
The invention removes the conventional cell cartridge structure entirely and replaces it with a monoframe structure. This extraction of the problematic cell cartridge eliminates the source of non-uniform pressure distribution while maintaining the essential function of fixing battery cells through the cushion bag mechanism
Solution Approach 2:
The invention introduces a cushion bag as an intermediary element between the monoframe and the battery cells. This cushion bag uniformly distributes the constraining force across the battery cell surfaces, preventing localized pressing and swelling while maintaining fixing stability. The cushion bag acts as a mediator that transforms the rigid monoframe constraints into uniform distributed pressure
2Reliability
If a conventional cell cartridge with foam pad is used, then the battery cell is constrained and volume expansion is mitigated, but the battery cell edges are damaged due to transmitted impacts and vibrations during mounting
Solution Approach 1:
The invention pre-installs a cushion bag between the monoframe and battery cells before final assembly. This cushion bag is specifically designed to absorb and distribute mounting impacts and vibrations, protecting the battery cell edges from damage while maintaining the constraint effectiveness during operation
Solution Approach 2:
The cushion bag is constructed from flexible material that can deform to absorb impact energy while maintaining the constraint function. This flexible shell structure replaces the rigid foam pad, providing both protection against impact damage and effective constraint of the battery cells
3Reliability
If a conventional cell cartridge structure is used, then battery cells are fixed, but space usage is inefficient and the module cannot accommodate cell swelling
Solution Approach 1:
The invention replaces the rigid, fixed cell cartridge structure with a dynamic system consisting of a monoframe and a flexible cushion bag. The cushion bag can dynamically adjust its volume and shape to accommodate battery cell swelling while maintaining the fixing function, thereby improving space efficiency and adaptability
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
This design enhances mechanical performance by preventing damage from impacts and vibrations, accommodating cell swelling, and optimizing space usage, resulting in a simpler, more compact battery module with improved assembly efficiency.
Implementation Method 1
a cushion bag which is provided in close contact between the battery cells and the monoframe
Data Source
AI summary
Provided is a battery module that is simple, compact and sure to improve the mechanical performance against cell pressing, swelling and impacts and a method for fabricating the same. The battery module according to the present disclosure includes two or more pouch-type battery cells, and a hollow quadrilateral monoframe in which the battery cells are received, wherein the monoframe has a first opening and a second opening that are open to two sides in lengthwise direction of the battery cells, wherein a cushion bag is provided in close contact between the battery cells and the monoframe.