Battery Cell Crimping Structure for Uniform Sealing Compression
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Solution Overview
Problem
The challenge in battery technology is to enhance the safety and processing efficiency of battery cells while ensuring effective sealing to prevent failures during charging and discharging processes, which current methods struggle to address effectively.
Innovation Solution
A device and method involving an upsetting mechanism with protruding structures that press the crimping structure of the battery cell towards its central axis, incorporating a reinforcing member between the crimping structure and cover plate to distribute pressure and improve compressive performance, and utilizing a rotating mechanism for uniform deformation of the crimping structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the crimping structure is pressed to improve sealing effect, then the sealing performance is improved, but the processing time and complexity increase
Solution Approach 1:
The patent applies local quality by placing protruding structures at specific locations on the upsetting mechanism to press only the crimping structure, rather than pressing the entire battery cell uniformly. This localized pressing approach improves sealing at the critical crimping area while minimizing unnecessary processing complexity and time
Solution Approach 2:
The patent incorporates a reinforcing member in advance during the assembly process, before the pressing operation. This preliminary action ensures that the crimping structure has adequate support and distribution of force during pressing, improving sealing effectiveness without requiring overly complex pressing mechanisms
2Strength
If the crimping structure is pressed to improve compressive performance, then the safety is improved, but the processing efficiency decreases
Solution Approach 1:
The protruding structures are positioned to press only the crimping structure locally, concentrating the pressing force where it is most needed for compressive performance. This avoids unnecessary pressing of other areas, maintaining processing efficiency while improving safety
Solution Approach 2:
The reinforcing member is pre-installed to provide structural support before pressing. This preliminary reinforcement enables more effective pressing to improve compressive performance without requiring excessive processing time or complexity
3Manufacturing precision
If the protruding structure presses the crimping structure uniformly, then the deformation uniformity is improved, but the device complexity increases
Solution Approach 1:
The upsetting mechanism is segmented into multiple protruding structures rather than using a single large pressing element. This segmentation allows the mechanism to apply pressure at multiple discrete points on the crimping structure, achieving more uniform deformation while keeping each individual protruding structure simple in design
Solution Approach 2:
The protruding structures serve multiple functions: they concentrate pressing force on the crimping structure, distribute pressure uniformly across the crimping area, and maintain structural simplicity. This multi-functionality achieves uniform deformation without proportionally increasing device complexity
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 approach enhances the compressive performance and sealing efficiency of the battery cell, improving safety and processing efficiency by distributing pressure and ensuring uniform deformation of the crimping structure, thereby reducing the risk of battery cell failure.
Implementation Method 1
the protruding structure is configured to press the crimping structure towards the direction of the central axis of the battery cell... so that the crimping structure is inclined towards a direction close to the central axis of the battery cell
Implementation Method 2
a rotating mechanism configured to control the upsetting mechanism to rotate about the central axis of the battery cell
Implementation Method 3
when the interior of the battery cell expands and pressure on the cover plate is caused to increase, the reinforcing member can resist at least part of the pressure, thereby reducing the pressure directly acting on the crimping structure
Data Source
AI summary
A device for producing a battery cell includes: an upsetting mechanism and a moving mechanism. The moving mechanism is configured to: control the upsetting mechanism to move towards the battery cell along a direction of a central axis of the battery cell. The battery cell includes a housing and a cover plate. The housing and the cover plate are connected in a sealing manner and formed with a crimping structure turned outwards. A surface of the upsetting mechanism facing the crimping structure is provided with at least one protruding structure, and the protruding structure is configured to press the crimping structure towards the direction of the central axis of the battery cell when the moving mechanism controls the upsetting mechanism to move towards the battery cell, so that the crimping structure is inclined towards a direction close to the central axis of the battery cell.