Cylindrical Battery Electrode Terminal With Nested Collector Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing processes for manufacturing cylindrical batteries face inefficiencies due to the need for a current collecting member to be bent, which reduces energy density and involves complex production processes like electric resistance welding, leading to low production efficiency and space utilization issues.
Innovation Solution
An electrode terminal with a concave-convex assembly design that eliminates the need for clamping, allowing for improved space utilization and accurate welding with a current collecting assembly, enhancing the bonding strength and safety of the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the current collecting member is bent to fit inside the battery, then the battery can be assembled, but the space utilization rate decreases and energy density is reduced
Solution Approach 1:
The current collecting member is nested within the electrode terminal through the concave-convex structure. The convex portion of the current collecting member fits into the concave groove of the electrode terminal, allowing the current collecting member to be stored inside the battery without occupying additional external space, thereby improving space utilization rate while maintaining assembly feasibility.
2Strength
If electric resistance welding or ultrasonic welding is used to connect the electrode terminal and current collecting member, then they can be joined, but the production process becomes complex and production efficiency decreases
Solution Approach 1:
The concave-convex assembly structure extracts the clamping function from the welding process. The concave groove and convex portion create a mechanical interlock that provides preliminary positioning and clamping, reducing the complexity of the welding process and improving production efficiency while maintaining bonding strength through the combined mechanical-welding connection.
3Ease of manufacture
If the current collecting member is bent to fit inside the battery, then assembly can be achieved, but the production process becomes complex
Solution Approach 1:
The concave groove is pre-formed on the electrode terminal and the convex portion is pre-formed on the current collecting member before assembly. This preliminary shaping creates a ready-to-assemble structure where the components naturally fit together without requiring complex bending operations during assembly, thereby simplifying the production process while maintaining assembly feasibility.
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 enables efficient and stable assembly of the electrode terminal with the current collecting assembly and external circuit, improving production efficiency and safety while increasing space utilization and bonding strength within the battery.
Implementation Method 1
the first protrusion and the first groove are welded at the first welding portion
Data Source
AI summary
Disclosed is an electrode terminal, which includes a columnar portion and a first extension portion. An end surface of the columnar portion is concave inwards to form a first groove, the first extension portion extends outwards along a circumferential direction of the end surface of the columnar portion formed with the first groove, and an electric connection portion is formed at an end of the columnar portion away from the first groove. The electrode terminal in the disclosure is fitted with a current collecting assembly, a clamping process of the electrode terminal and the current collecting assembly is effectively omitted, a space utilization rate of a battery is improved, and the electrode terminal is welded to an external circuit more accurately and simply. In addition, further disclosed are a current collecting assembly and a cylindrical battery.