Battery Module Housing Structure for Thermal Propagation Isolation
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Solution Overview
Problem
Conventional battery modules lack individual housings for cell module assemblies, leading to the propagation of events such as fire outbreaks from one assembly to adjacent assemblies.
Innovation Solution
Each cell module assembly is housed in an individual housing with module plates covering the front and rear, featuring overlapping distal ends for enhanced sealability, and includes a busbar unit for electrical connection, a space portion for insulation, and a flame retardant material to prevent heat and flame transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell module assemblies are arranged without individual housings to save space, then the device complexity is reduced, but the reliability deteriorates due to event propagation between adjacent assemblies
Solution Approach 1:
The patent divides the battery module into multiple independent cell module assemblies, each enclosed in its own housing. This segmentation isolates potential events (fire, thermal runaway) to individual assemblies, preventing propagation to adjacent assemblies while maintaining overall system functionality.
Solution Approach 2:
The patent implements a nested structure where cell module assemblies are placed inside individual housings, which are then arranged within the overall battery module housing. This nested arrangement provides both isolation at the assembly level and structural organization at the module level.
2Reliability
If individual housings are added to each cell module assembly to prevent event propagation, then the reliability improves, but the device complexity increases due to additional housing components
Solution Approach 1:
The housing structure serves multiple functions simultaneously: it provides mechanical protection for battery cells, acts as an isolation barrier against event propagation, and forms part of the overall module structure. This multi-functionality reduces the need for separate protective components.
Solution Approach 2:
The patent combines the protective housing function with the structural framework of the battery module. The housings are designed to work together with the module housing and fastening system, creating an integrated structure rather than adding separate protective elements.
3Ease of repair
If module housing is removed to allow individual housings for each assembly, then the ease of repair improves for maintenance, but the strength deteriorates due to reduced overall structural integrity
Solution Approach 1:
The patent creates a dynamic modular structure where the module housing can be easily assembled and disassembled for maintenance, yet provides sufficient structural integrity when assembled. The fastening system allows for reversible connection, enabling easy repair while maintaining strength during operation.
Solution Approach 2:
The housing and fastening structures are pre-designed and pre-configured to enable easy assembly and disassembly. Fastening portions are positioned and shaped to facilitate straightforward installation and removal, allowing maintenance personnel to access individual assemblies without complex disassembly procedures.
Data Source
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AI summary
Disclosed is a battery module configured to prevent heat transfer between cell module assemblies in the battery module, the battery module including a plurality of cell module assemblies and module plates, wherein each of the cell module assemblies includes a plurality of battery cells and an individual housing configured to receive the plurality of battery cells, the individual housing includes an upper plate located at the upper part of the plurality of battery cells, a lower plate located at the lower part of the plurality of battery cells, and two side plates located at opposite side surfaces of the plurality of battery cells, the two side plates being configured to connect the upper plate and the lower plate to each other, excluding a front and a rear of the plurality of battery cells, from which electrode leads protrude, and each of the pair of module plates has a size that covers a corresponding one of the entire front and the entire rear of the plurality of cell module assemblies, from which the electrode leads protrude, the pair of module plates being located respectively at the front and the rear of the plurality of cell module assemblies so as to be fastened to the plurality of cell module assemblies.