Battery Terminal Raised Structure for Beam Welding Heat Shielding
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Solution Overview
Problem
Beam welding techniques, such as laser welding, can cause thermal deterioration and reduce the joining strength and conductivity of metal joining portions in secondary battery terminals due to heat input during the irradiation process.
Innovation Solution
A terminal component design featuring a raised portion on the surface of a metal joining member, which acts as a shield to reduce heat input from beam irradiation, thereby minimizing thermal deterioration. This design includes a recessed portion with a raised portion that does not exceed the height of the recessed portion, allowing for effective welding while reducing heat exposure to the metal joining area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam welding is used to join the bus bar and electrode terminal, then welding efficiency and automation are improved, but thermal deterioration of the metal joining portion occurs due to heat input from beam irradiation
Solution Approach 1:
The patent introduces a beam-shielding structure (protrusion or raised portion) as an intermediary element between the beam irradiation path and the metal joining portion. This mediator blocks or redirects the beam radiation, preventing direct heat input to the joining area while allowing the welding process to proceed efficiently on the bus bar surface.
Solution Approach 2:
The patent segments the bus bar structure by adding a separate beam-shielding protrusion or raised portion that is spatially distinct from the metal joining portion. This segmentation allows the welding area and the protected joining area to be independently managed, enabling efficient beam welding while preserving joining strength.
2Extent of automation
If beam welding is used to join the bus bar and electrode terminal, then automation is improved, but conductivity of the metal joining portion is reduced due to thermal deterioration
Solution Approach 1:
The beam-shielding protrusion acts as a mediator that blocks thermal radiation from reaching the metal joining portion during automated beam welding. This allows the automation benefits to be realized while protecting the conductivity-critical joining area from thermal damage.
Solution Approach 2:
The patent applies local quality protection by adding the beam-shielding structure only in the specific area where thermal protection is needed (near the metal joining portion), while allowing the rest of the bus bar to be efficiently welded. This localized approach preserves conductivity where needed without compromising overall automation efficiency.
3Reliability
If a raised portion is added to shield the metal joining portion from beam irradiation, then thermal deterioration is reduced, but device complexity increases
Solution Approach 1:
The patent merges the beam-shielding function with the existing bus bar structure by forming the protrusion or raised portion as an integral part of the bus bar. This integration achieves thermal protection without adding separate components, thereby minimizing the increase in device complexity while maintaining joining strength.
4Reliability
If a raised portion is added to shield the metal joining portion from beam irradiation, then thermal deterioration is reduced, but manufacturing complexity increases
Solution Approach 1:
The beam-shielding protrusion or raised portion is formed preliminarily during the bus bar manufacturing process (e.g., through molding or forming operations) before the welding step. This preliminary action integrates the protective feature into the base material processing, avoiding the need for separate manufacturing steps and reducing overall manufacturing complexity.
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 raised portion effectively shields the metal joining area from beam irradiation, reducing thermal deterioration and maintaining the joining strength and conductivity of the terminal components in secondary batteries.
Implementation Method 1
the raised portion can function as a wall that shields a portion near the metal joining portion from irradiation of a beam. Thus, heat input to the metal joining portion by beam irradiation is suppressed, so that thermal deterioration of the metal joining portion can be reduced.
Implementation Method 2
beam welding, such as laser welding or the like, is widely used for welding a bus bar and an electrode terminal. In beam welding, after a bus bar is locally melted in a portion irradiated with a beam, a melted portion is solidified, thereby realizing welding with an electrode terminal.
Data Source
AI summary
This disclosure provides a terminal component that can reduce thermal deterioration due to beam irradiation to a metal joining portion. A terminal component disclosed herein includes a first member formed of a metal and a plate-like second member formed of a metal, and a metal joining portion joined by metal joining is formed in a boundary surface where the first member and the second member are stacked. On a surface of the second member in an opposite side to the boundary surface, a raised portion raised from the surface is formed in a peripheral portion close to the metal joining portion.