Welded Part Width Variation for Container Joint Strength
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Solution Overview
Problem
Conventional energy storage device manufacturing methods face challenges in achieving high joint strength between the container body and lid body while maintaining manufacturing efficiency, as excessive welding time can lead to reduced efficiency and insufficient welding can result in weak joints.
Innovation Solution
The energy storage device features an elongated welded part with a first and second welded part, where the second welded part has a larger width and length than the first, positioned on the lateral side of a gas release vent, enhancing joint strength and resistance to internal pressure without compromising welding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If welding is performed at high speed, then manufacturing efficiency is improved, but joint strength becomes insufficient due to shortage of melting amount
Solution Approach 1:
The welding process is divided into two distinct stages: a first welding stage that forms a base welded part, and a second welding stage that forms an additional welded part with larger width. This segmentation allows each stage to serve different functions - the first stage ensures basic joint strength while the second stage enhances strength at critical areas without significantly increasing total welding time
Solution Approach 2:
The second welded part is designed with larger width specifically at the lateral side of the gas release vent, where structural strength is most critical. This local quality enhancement ensures that the area most susceptible to internal pressure has superior joint strength, while other areas maintain adequate strength with less welding material
2Strength
If welding is performed for considerable time, then joint strength between members is enhanced, but manufacturing efficiency is lowered
Solution Approach 1:
Instead of uniformly increasing welding width along the entire welded part, the invention applies larger width only at the critical region (lateral side of gas release vent). This localized approach enhances joint strength where most needed while minimizing additional welding time and material consumption
Solution Approach 2:
The first welding stage performs the bulk welding operation to establish the primary joint, and the second welding stage adds reinforcement only where needed. This preliminary action structure allows the majority of welding to be completed efficiently, with minimal additional time for enhancement at critical areas
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 enhances the reliability of the container by increasing joint strength, particularly at the gas release vent area, while maintaining efficient welding operations, ensuring the container's integrity and performance.
Implementation Method 1
a laser beam is irradiated to a butting portion (boundary portion) between the lid body and an opening of the container body so that metal in such a portion is melted whereby the lid body and the container body are joined to each other
Data Source
AI summary
An energy storage device is equipped with a container having a container body and a lid body, which closes an opening of the container body. An elongated welded part which is a welded portion between the container body and the lid body, is formed on the container. The welded part has a first welded part and a second welded part arranged in a row in a lengthwise direction of the welded part, wherein a width of the second welded part in a widthwise direction of the welded part is set larger than a width of the first welded part in the widthwise direction. A gas release vent is disposed on the lid body, wherein the second welded part is disposed on a lateral side of the gas release vent, and a length of the second welded part in the lengthwise direction is set larger than a length of the gas release vent in the lengthwise direction.