Battery Tab Current Collector Welding With Convex Joining Section
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Solution Overview
Problem
Conventional batteries face challenges in enhancing the conductivity of electrode tabs and current collectors, leading to welding failures and reduced productivity.
Innovation Solution
The battery design incorporates a current collector with a convex joining section that is welded to the electrode tab, improving contact and conductivity, and a manufacturing method that brings the electrode tab and joining section into contact before welding, ensuring a strong and conductive connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional joining methods are used between electrode tab and current collector, then manufacturing process is simple, but conductivity is insufficient and welding failures occur
Solution Approach 1:
The current collector is designed with a convex portion that protrudes toward the electrode tab, creating a curved surface geometry. This convex shape increases the contact area between the current collector and electrode tab, improving welding reliability and electrical conductivity without significantly complicating the manufacturing process
2Reliability
If conventional flat joining structure is used, then manufacturing is easier, but conductivity and contact area are insufficient
Solution Approach 1:
The convex portion on the current collector creates a curved joining surface that naturally increases contact area with the electrode tab. This geometric modification improves electrical conductivity while maintaining compatibility with conventional welding manufacturing processes
Solution Approach 2:
The current collector is modified locally by adding a convex portion at the specific joining location, rather than changing the entire structure. This localized modification improves conductivity at the critical interface without significantly increasing overall manufacturing 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 configuration increases the conductivity of the electrode tab and current collector, reduces welding failures, and enhances the productivity and yield of the battery manufacturing process.
Implementation Method 1
The electrode tab and the joining section are welded
Data Source
AI summary
A battery includes a charge/discharge body having an electrode (a positive electrode and a negative electrode) with an electrode tab (a positive electrode tab and a negative electrode tab) and a current collector (a positive electrode current collection plate and a negative electrode current collection plate) joined to the electrode tab (the positive electrode tab and the negative electrode tab). The current collector (the positive electrode current collection plate and the negative electrode current collection plate) includes a convex joining section (a positive electrode joining section and a negative electrode joining section). The electrode tab (the positive electrode tab and the negative electrode tab) and the joining section (the positive electrode joining section and the negative electrode joining section) are welded.