Small Relay, Big Performance – Precision Built for Reliable Switching

Material: High-conductivity stainless steel such as SUS304/316L or copper alloys such as phosphor bronze, with nickel or tin plating for enhanced corrosion resistance and electrical performance.
Shape: Precision cylindrical design featuring internal threads or stepped interfaces for secure assembly and reliable connection.
Size Range: Diameter: Φ8–25 mm; Height: 10–40 mm. Custom dimensions are available upon request.
Internal Design: Precision-machined internal bore engineered for accurate pin insertion, threaded connections, and stable component integration.
Surface Finish: Precision polishing followed by nickel/tin plating to improve surface conductivity, wear resistance, corrosion resistance, and oxidation protection.
Manufacturing Process: CNC turning + precision grinding + electrochemical polishing, ensuring tight dimensional tolerances, smooth surfaces, and consistent component quality.

Smart Battery Disconnect Relay for Reliable Vehicle Power Control
The smart battery disconnect relay is a high-performance power control component designed to manage battery-to-load connections safely and efficiently. It is widely used in automotive electrical systems, EVs, energy storage systems, solar power applications, and backup power equipment, providing reliable power isolation and stable energy distribution.

High-Current Capacity & Low Contact Resistance
Designed for demanding power applications, the relay supports high-current switching while maintaining excellent electrical conductivity. Precision-engineered contact components help minimize contact resistance, reduce energy loss, and improve overall power transmission efficiency.

Reliable Performance in Harsh Conditions
Built for challenging operating environments, the relay offers strong resistance to heat, vibration, corrosion, and mechanical stress. A secure structural design helps maintain stable electrical connections and dependable switching performance in vehicles, industrial equipment, and mobile power systems.

Precision-Machined Components
Every critical relay component is manufactured using CNC turning, precision machining, grinding, and surface treatment processes. Tight dimensional control ensures accurate component fit, smooth operation, and consistent switching performance, contributing to enhanced reliability and extended service life.

Flexible Design for System Integration
The modular structure enables convenient integration into different vehicle power control and battery management architectures. Custom configurations can be developed to accommodate specific electrical, mechanical, and installation requirements, providing greater flexibility for different applications.

OEM / ODM Customization
Caiyi Precision provides comprehensive OEM and ODM services for customized smart battery disconnect relays and precision relay components. We support customization of materials, dimensions, contact structures, electrical specifications, surface treatments, and branding to meet specific application and system requirements.