Battery Pole Flange Joint for Copper-Aluminum Bonding Stability
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Solution Overview
Problem
The bonding force between copper and aluminum materials in battery poles is low, leading to easy separation and affecting electrical performance.
Innovation Solution
A pole structure with convex flanges and mating grooves, along with inverted buckle portions and connecting grooves, enhances the bonding surface and stability between copper and aluminum components, using cold-heading stamping for improved connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If copper and aluminum materials are connected by stamping, then the pole has better electrical performance, but the bonding force at the joint surface is low
Solution Approach 1:
The pole is divided into copper pole portion and aluminum pole portion as separate segments that can be independently formed and then connected through cold-heading stamping, allowing each material to maintain its optimal properties while achieving strong inter-material bonding
Solution Approach 2:
The copper pole portion and aluminum pole portion are merged through cold-heading stamping to form an integrated pole structure with strong bonding force, combining the advantages of both materials while ensuring reliable electrical performance
2Device complexity
If copper and aluminum materials are connected by stamping, then the pole structure is simplified, but the materials easily separate
Solution Approach 1:
The copper pole portion and aluminum pole portion are preliminarily formed with predetermined geometries and surface characteristics before being connected through cold-heading stamping, ensuring optimal bonding conditions and preventing separation under operational stresses
Data Source
AI summary
A pole, a pole component, and a battery are provided. The pole includes a first pole portion and a second pole portion. The first pole portion includes a first end and a second end that are in an axial direction of the first pole portion. An outer periphery of the first pole portion is convexly provided with a first flange, and the first flange is spaced apart from the second end in the axial direction. The first end is provided in a mating groove and engages with the second pole portion. An outer periphery of the second pole portion is convexly provided with a second flange. The first pole portion is spaced apart from the second flange. The second flange is provided with a first connecting groove, and the first flange is at least partially located in the first connecting groove and engages with the second flange.