Ultrasonic Tab Welding Alignment for Uniform Battery Bonding
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Solution Overview
Problem
In ultrasonic welding devices for secondary batteries, non-horizontal alignment of the anvil and horn with respect to the overlapping surface of the electrode tab and electrode lead results in uneven energy transmission, leading to welding defects.
Innovation Solution
An ultrasonic welding device with an inspection member to ensure horizontal alignment of the anvil and horn, using measuring and adjusting members to correct angles within a predetermined range, ensuring uniform energy application across the overlapping surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the anvil and horn are not disposed horizontally with respect to the overlapping surface, then the welding process can be performed, but the welding energy is not uniformly transmitted causing welding defects
Solution Approach 1:
The patent applies preliminary action by providing an inspection member that measures the horizontal levels of the anvil and horn before the welding process occurs. This allows the system to detect alignment issues in advance and prevent welding defects by ensuring proper horizontal disposition of the welding components relative to the overlapping surface
Solution Approach 2:
The inspection member provides feedback about the horizontal alignment of the anvil and horn by measuring their levels with respect to the overlapping surface. This feedback mechanism enables the system to monitor and maintain proper alignment, ensuring uniform welding energy transmission across the entire overlapping surface
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 ensures uniform bonding force across the entire overlapping surface, preventing welding defects and improving overall welding quality.
Implementation Method 1
a horn configured to weld the overlapping surface disposed on the anvil
Data Source
AI summary
An ultrasonic welding device includes an anvil provided so that an overlapping surface of an electrode tab and an electrode lead, which are provided in an electrode assembly, are configured to be disposed thereon; a horn configured to weld the overlapping surface disposed on the anvil; and an inspection member configured to inspect a horizontal level of an opposing member with respect to the overlapping surface, based on an overlapping surface horizontal value that is a horizontal value of the overlapping surface with respect to a predetermined reference surface and an opposing horizontal value that is a horizontal value of the opposing member, which is one of a welding part of the horn configured to face the overlapping surface and a disposing part of the anvil, on which the overlapping surface is configured to be disposed, with respect to the predetermined reference surface.