Battery Can Welding Jig With Adjustable Pressure for Laser Joining
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Solution Overview
Problem
The existing method of welding a battery can and electrode using a laser beam from inside the battery can is inefficient due to the need for repeated insertion and detachment of the laser nozzle, leading to long tact times and potential deformation of the battery can when using a welding jig with pressure contact.
Innovation Solution
A welding jig with a plate-like support member, a rod-like support member, and a pressure adjusting mechanism that allows for adjustable pressure between the support members, enabling laser beam welding without deforming the battery can by irradiating the outer surface of the battery can.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a welding jig with pressure contact is used to weld the battery can and electrode, then welding efficiency is improved, but the battery can deforms
Solution Approach 1:
A plate-like support member is introduced as an intermediary between the pressure applying mechanism and the battery can bottom. This support member distributes the applied pressure over a larger area, preventing localized deformation of the battery can while maintaining effective pressure contact for welding. The support member acts as a mediator that enables pressure application without direct contact between the pressure source and the battery can surface.
2Reliability
If a laser beam irradiation nozzle is inserted into the hollow shaft core portion for welding, then welding quality is improved, but the tact time becomes long due to repeated insertion and detachment
Solution Approach 1:
The support member integrates multiple functions: it provides structural support for the electrode assembly, maintains proper positioning during welding, and serves as a pressure distribution interface. By combining these functions into a single component, the system eliminates the need for separate nozzle insertion and positioning operations, thereby reducing tact time while maintaining welding quality.
Solution Approach 2:
The support member is pre-positioned and the electrode assembly is pre-aligned before the welding process begins. This preliminary positioning ensures that when welding commences, all components are already in their correct positions, eliminating the need for repeated insertion and adjustment during the welding process, thus reducing tact time.
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
Enables efficient welding of battery cans and electrodes with a laser beam without deforming the battery can, reducing tact time and improving the welding process by adjusting pressure to prevent deformation.
Implementation Method 1
a plate-like support member having a through hole through which a laser beam can pass
Implementation Method 2
the pressure adjusting mechanism can adjust a pressure applied between the plate-like support member and the rod-like support member
Data Source
AI summary
A welding jig including a first support member; a second support member; and a pressure adjusting mechanism. Wherein the first support member has a through hole through which a laser beam can pass, the second support member being configured to be insertable into and detachable from a hollow shaft core portion of a jelly roll type electrode assembly, and one end of the second support member supporting an electrode and a bottom of a battery can disposed on a side of one end of the jelly roll type electrode assembly. The pressure adjusting mechanism being configured to adjust a pressure applied between the first support member and the second support member, and the through hole being configured to allow the laser beam to weld the battery can and the electrode.