Electrochemical Cell Contact Lug Damping for Vibration Resistance
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Solution Overview
Problem
Conventional electrochemical cells with contact lugs are prone to detachment due to mechanical loads such as impacts and vibrations, and safety measures like rupture crosses can be obstructed during welding, posing hazards and reliability issues.
Innovation Solution
The electrochemical cell features a contact lug with a damping section capable of free oscillation, which buffers impacts and vibrations, and a safety valve with a curved profile that does not obstruct the rupture cross, enhancing mechanical stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contact lugs are rigidly fastened to the end face, then electrical connection is secure, but the contact lugs are prone to detachment under mechanical loads such as impacts and vibrations
Solution Approach 1:
The contact lug is designed with a damping section that enables it to dynamically respond to mechanical loads. This section can flex and oscillate freely, allowing the contact lug to absorb impact energy and vibration forces rather than transmitting them directly to the weld joint, thereby preventing detachment while maintaining electrical connection stability
Solution Approach 2:
The damping section acts as a pre-configured cushioning element between the rigid end face and the contact lug extension. This cushioning structure is built into the design beforehand, enabling the contact lug to withstand mechanical shocks and vibrations without compromising the weld joint or electrical connection
2Reliability
If a rupture cross is provided for safety pressure relief, then excess pressure can be controlled, but the rupture cross can be obstructed during welding of contact lugs
Solution Approach 1:
The contact lug is designed with a three-dimensional structure where the damping section provides vertical clearance between the end face and the contact lug extension. This dimensional arrangement allows the rupture cross to be positioned on the end face without being obstructed by the contact lug, enabling both safety functionality and welding accessibility
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 solution significantly improves the resistance of contact lugs to mechanical loads, reduces the risk of detachment, and ensures the safety valve is not obstructed, thereby enhancing the overall safety and reliability of the cell.
Implementation Method 1
the contact lug, between the first contact-connection section and the second contact-connection section, includes a damping section capable of free oscillation
Implementation Method 2
the contact lug, between the first contact-connection section and the second contact-connection section, includes a damping section capable of free oscillation
Data Source
AI summary
An electrochemical cell includes a cylindrical housing that encloses an interior space having a first end face and a second end face that are interconnected by an annular shell, and a positive and a negative electrode are arranged in the interior of the housing, wherein the negative electrode is electrically connected, either directly or via a separate conductor, to the first end face to constitute a negative pole, and the positive electrode is electrically connected, either directly or via a separate conductor, to the second end face to constitute a positive pole, and a contact lug is fastened to the first or second end face of the housing.