DC Relay Metallized Welded Ceramic Housing
Products Description
The metallized, DC Relay Metallized Welded Ceramic Housing is a structural component involving the precision joining of electronic ceramics and metal; it typically consists of a high-performance alumina ceramic body, a metallization layer, and metal connectors.
Its key features include:
1. High Insulation Performance
Ceramic materials possess excellent electrical insulation capabilities, effectively isolating high-voltage current paths, reducing the risk of leakage, and ensuring the safe operation of high-voltage DC systems.
2. High Hermeticity
Utilizing metallized welding technology creates a stable bond between the ceramic and metal, meeting the hermetic sealing requirements of the HVDC relay's internal environment and effectively preventing the ingress of air, moisture, and contaminants.
3. Excellent Heat Resistance
Heat is generated within the relay during the operation of new energy vehicles and energy storage systems; the ceramic material offers superior thermal stability, maintaining consistent structural performance over the long term.
Detail Showcase: Engineering Reliability at the Micro Scale
Precision Sealing Surfaces
The High Purity Alumina Precision Advanced Ceramic Metallization Parts end faces undergo precision grinding to achieve exceptional flatness; this ensures a uniform brazing gap, preventing micro-leaks caused by incomplete solder filling due to localized excessive gaps.
Thermal Shock Stability
The component withstands rigorous thermal shock testing (e.g., rapid temperature cycling from -40°C to +125°C) without cracking at the ceramic-to-metal interface, demonstrating the effective relief of residual stresses.
Visual Purity
The Ceramic EV Relay Case body is pure white, free from black cores, impurities, or sintering cracks; the surface is easy to clean, meeting the stringent cleanliness requirements of high-voltage insulation environments.
Application Advantages: Covering the Full Spectrum of High-Voltage Electrical Systems in New Energy
| Main Relays for New Energy Vehicles (BEV/PHEV) | In the event of a short circuit or severe collision, the main circuit of the battery pack requires the relay to instantly cut off high-voltage, high-current flow. Thanks to the consistent flexural rigidity of the metallized ceramic housing, the product remains free from micro-cracks or leakage even under prolonged, intense vibration. |
| High-Voltage DC Fast-Charging Stations | As the power output of ultra-fast charging stations pushes new limits, charging circuits are subjected to frequent high-load making and breaking operations. The Ceramics offer excellent thermal conductivity, effectively dissipating heat from the contacts and significantly reducing the overall internal temperature rise of the contactor. |
| High-Voltage Battery Cluster Control in Large-Scale Energy Storage Systems (ESS) | Energy storage systems undergo extremely frequent switching cycles during grid peak shaving, frequency regulation, and grid integration. The metallized ceramic housing ensures that the internal gas leakage rate remains consistently below safety thresholds throughout a maintenance-free service life exceeding 15 years. |
| Rail Transit and Industrial High-Voltage DC Control | Rail transit vehicles and industrial DC control systems place stringent demands on insulation components regarding vibration resistance, weatherability, and longevity. The Alumina Ceramics is suitable for harsh operating conditions characterized by high altitudes, high humidity, and frequent high-current interruption. |
Manufacturing Process Flow
Ceramic substrate preparation
Batching of high-purity raw materials, spray granulation, and precision injection molding or dry pressing.
01
High-temperature sintering
Controlling grain growth to achieve high density and mechanical strength.
02
Surface treatment
Cleaning and activating the 95% Alumina Metallized Ceramic surface to prepare for metallization.
03
Precision metallization
Forming a patterned metal layer using processes such as screen printing, sputtering, or electroless plating.
04
High-temperature firing/co-firing
Establishing a strong chemical bond between the metal layer and the Metallized Ceramic.
05
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If you are developing HVDC relays, EV contactors, or high-voltage switches for energy storage, we can provide reliable engineering solutions for EV Relay Metallized High Alumina Ceramics tailored to your structural designs and application requirements, supporting enhanced product performance and stable mass production through our professional manufacturing capabilities.
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