Cylindrical Battery Crimp Structure for Double Sealing and Stable Fixing
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Solution Overview
Problem
Conventional cylindrical batteries face challenges in complete sealing and structural stability due to inadequate sealing mechanisms and lack of fixing structures when installed in battery modules or packs.
Innovation Solution
A battery design featuring an inwardly recessed crimping portion with a recessed portion and sealing gasket, along with a housing cover and support structures, enhances sealing power and structural stability by providing a double-sealing mechanism and support system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional crimping process is used to seal the top of the housing, then the manufacturing process is simple, but the sealing is incomplete and electrolyte leakage occurs
Solution Approach 1:
The crimping portion is divided into multiple functional segments: an outer crimping portion for initial sealing, an inner crimping portion for reinforcement, and a recessed portion for double-sealing. This segmentation allows each part to perform its specific sealing function, ensuring complete sealing while maintaining manufacturing simplicity.
Solution Approach 2:
The inner crimping portion is nested within the outer crimping portion, creating a nested sealing structure. The inner crimping portion is further nested within the recessed portion, forming a double-sealing mechanism. This nesting approach enhances sealing reliability without significantly increasing overall structural complexity.
2Stability of the object's composition
If no fixing structure is provided for the cylindrical battery, then the device complexity is low, but the structural stability in battery modules or packs is insufficient
Solution Approach 1:
The crimping portion is pre-formed with a recessed portion during the battery manufacturing process, creating a built-in fixing structure before installation. This preliminary action ensures that when the battery is installed in a battery module or pack, the recessed portion can engage with corresponding structures to provide structural stability without requiring additional fixing components.
3Reliability
If the crimping portion is simply bent inward without a recessed portion, then the manufacturing process is simple, but the sealing power is insufficient to prevent electrolyte leakage
Solution Approach 1:
The crimping portion is segmented into an outer crimping portion and an inner crimping portion with a recessed portion in between. This segmentation creates multiple sealing interfaces that enhance sealing power while using standard crimping equipment, maintaining ease of manufacture.
Solution Approach 2:
The recessed portion adds a dimensional feature to the crimping structure, creating a double-sealing mechanism that improves sealing power. This dimensional change is achieved through the crimping process itself, so it does not significantly complicate the manufacturing process.
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 prevents electrolyte leakage and ensures structural stability by improving sealing power and fixing force, while allowing for stable installation in battery modules or packs.
Implementation Method 1
a recessed portion may be formed on a bent end of the crimping portion so as to be at least partially recessed inward
Implementation Method 2
The sealing gasket may have a sealing reinforcement portion configured to be compressed by the recessed portion of the crimping portion
Data Source
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AI summary
The present disclosure relates to a battery including: an electrode assembly; and a housing configured to store the electrode assembly and having a crimping portion configured such that an end around an opening formed on one side thereof is bent inward, wherein a recessed portion may be formed on a bent end of the crimping portion so as to be at least partially recessed inward.