Busbar forming a char layer, and manufacturing method thereof

The busbar with a char layer, using silicon and expanded graphite, addresses insulation integrity issues by ensuring consistent positioning and rapid fire suppression through controlled expansion and contraction, forming a fire-resistant char layer.

KR102990612B1Active Publication Date: 2026-07-15SILICONE VALLEY
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Patent Information

Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
SILICONE VALLEY
Filing Date
2024-05-29
Publication Date
2026-07-15

AI Technical Summary

Technical Problem

Existing methods for insulating busbars face challenges in maintaining insulation integrity due to cracking or breaking upon impact, incorrect positioning of insulation covering, and varying contraction lengths, especially when using shrink tubes, which complicates the insulation process and fire suppression.

Method used

A busbar with a char layer formed by a method involving a hollow internal insulating material containing silicon and an external insulating material composed of expanded graphite and silicon, oriented in the longitudinal direction, is manufactured through expansion and contraction stages to ensure high-quality insulation and fire suppression.

Benefits of technology

The char layer effectively insulates busbars of various shapes by minimizing position changes during expansion and contraction, quickly forming a fire-resistant char layer to prevent fire spread and maintain insulation quality.

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Abstract

The present invention relates to a busbar forming a char layer and a method for manufacturing the same. More specifically, it relates to a busbar forming a char layer and a method for manufacturing the same, which can suppress fire spread through the formation of a char layer, can insulate busbars of various shapes quickly and with high quality through the expansion and contraction of an insulating material, and reduces limitations in insulation and thermal insulation performance when the expanded graphite expands due to fire exposure through a double bonded structure separated into an inner insulating material and an outer insulating material containing expanded graphite. In addition, the method is characterized by comprising: a first preparation step for manufacturing a hollow internal insulating material containing silicon; a second preparation step for forming an external insulating material containing expanded graphite and silicon on the outer surface of the internal insulating material manufactured through the first preparation step; an expansion step for impregnating the insulating material manufactured through the second preparation step with a solvent to expand the insulating material so that it expands; a placement step for inserting a bus bar into the insulating material expanded through the expansion step; and a contraction step for contracting the insulating material so that it adheres closely to the bus bar inserted through the placement step.
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