Laser Attenuation Structure for Battery Assembly Side-Welding Leakage
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Solution Overview
Problem
Conventional laser welding machines fail to adequately prevent unintended leakage of laser light when applied in a lateral direction, posing a safety risk.
Innovation Solution
A manufacturing apparatus for battery assemblies incorporating a laser light attenuation mechanism with a main body featuring an uneven structure that diffusely reflects laser light or a coolant flow path to attenuate and block laser light, ensuring secure containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional laser welding machine is used, then laser welding can be performed, but unintended leakage of laser light occurs when applied in lateral direction
Solution Approach 1:
A laser light attenuation portion is introduced as an intermediary component between the laser light source and the external environment. This attenuation portion includes a main body with an uneven structure on its surface that diffusely reflects laser light, and optionally a coolant flow path inside the main body, to attenuate and block laser light before it can leak outward, thereby resolving the safety issue without affecting the welding function
Solution Approach 2:
The patent converts the harmful concentrated laser light into a beneficial diffuse reflection pattern. By providing an uneven structure on the surface of the attenuation portion, the concentrated laser light is scattered in multiple directions with reduced intensity, transforming the harmful focused beam into a safe diffuse reflection that protects against laser light leakage
2Adaptability or versatility
If laser light is applied in lateral direction for welding, then welding accessibility is improved, but laser light containment becomes more difficult
Solution Approach 1:
The laser light attenuation portion serves as a mediator that enables lateral direction welding while preventing the associated leakage problem. It is positioned to face the laser light source and attenuate the light before it can escape in lateral directions, allowing the system to maintain welding flexibility without compromising safety
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
Effectively prevents unintended leakage of laser light, enhancing safety by diffusely reflecting and blocking laser light to protect against external exposure.
Implementation Method 1
an uneven structure that is provided in a surface of the main body and that diffusely reflects the laser light
Implementation Method 2
a coolant flow path provided inside the main body
Data Source
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AI summary
The present application relates to a manufacturing apparatus for a battery assembly (1) having a joining-target portion at which a plurality of members are joined together by laser welding. The manufacturing apparatus includes: a laser (100) that applies laser light (110) toward the joining-target portion; and a laser light attenuation portion (200) that is provided at least at a position facing the laser (100) and that attenuates the laser light (110), wherein the laser light attenuation portion (200) includes a main body, and i) an uneven structure that is provided in a surface of the main body and that diffusely reflects the laser light, or ii) a coolant flow path provided inside the main body.