EV Relay Armature Pure Iron Plate
Products Description
Unlike traditional industrial relays, EV relays often operate under high voltage, high current, and harsh temperature conditions. Our EV Relay Armature pure iron plate series is specifically optimized for the high-performance requirements of the new energy vehicle sector:
Armature: The key moving component responding to coil commands, requiring extremely high magnetic response speed.
Yoke and Base Plate: The foundation of the closed magnetic circuit, requiring long-term dimensional stability.
Shielding/Housing: For high-voltage DC contactors, it provides physical protection while also serving a crucial electromagnetic shielding function to prevent interference with onboard sensors.
Production Process: A Precision Journey from Strip Coil to Magnetic Circuit Components
| Strip Coil Pre-treatment and Slitting | Electrical pure iron strip coils undergo stress-relief annealing, tension leveling, and slitting to obtain the width and shape suitable for progressive die stamping. Slitting burrs are controlled to <0.03mm to avoid abnormal wear on subsequent stamping dies. |
| Progressive Die Precision Stamping | Punching, blanking, bending, flanging, rib forming, and finishing processes are completed sequentially in a multi-station progressive die. Pressure plates and ejector pins are installed at key stations to prevent warping and springback of thin sheets. Stamping speed is optimized according to material thickness and complexity, typically 80-150 times/minute. |
| Deburring and Chamfering | Burrs on the punched section are removed using tumbling, vibratory grinding, or belt abrasion processes. Sharp edges are chamfered (C0.3-C0.5mm) to meet high-voltage insulation and assembly safety requirements. |
| Cleaning and Surface Protection | Ultrasonic cleaning removes stamping oil and metal debris. Bluing, phosphating, Dacromet coating, or organic coating is applied according to customer requirements. The bluing layer is 0.5-1.5μm thick, providing both insulation and rust prevention. Organic coatings can be customized in color to meet customer brand recognition needs. |
| Annealing and Magnetic Property Restoration | Recrystallization annealing is performed in a protective atmosphere to eliminate stamping stress and restore magnetic properties. Controlling the cooling rate after annealing is crucial; too rapid cooling may reintroduce stress, while too slow cooling will affect production efficiency. We employ controlled cooling technology to balance magnetic properties and production cycle time. |
Application Advantages: Empowering Green Mobility
Improved Response Frequency
Sensitive magnetic induction enhances relay switching speed, effectively protecting the Battery Management System (BMS).
Reduced Energy Consumption
High magnetic induction means less current is required during coil maintenance, reducing overall vehicle standby power consumption.
Lightweight Potential
Relay Terminal Armature Superior magnetic circuit design enables the use of thinner, pure iron plates to achieve the same attraction force, thereby contributing to EV weight reduction.
Interference Protection
High-quality magnetically conductive outer casing effectively suppresses EMC (electromagnetic compatibility) issues.
Why Choose Us?
In the field of high-voltage DC relays for new energy, stamped parts may seem simple. Still, in reality, they place far greater demands on material consistency, mold precision, stress control, and surface treatment than traditional industrial products. We have focused on electrical pure iron stamping for many years, accumulating rich engineering experience:
We understand how to balance stamping efficiency and dimensional accuracy through mold structure design.
We understand how to eliminate stress without damaging the material's surface condition through heat treatment processes.
We also understand how to coordinate with our clients' new product development schedules, ensuring process verification for mass production even at the sample stage.
We do not participate in price wars because we deeply understand that a flattened armature can cause several times the Electrician Pure Iron Armature rework costs on a client's production line; an outer casing with excessive burrs can lead to serious insulation failures at the final stage. What we provide is end-to-end engineering control capabilities from materials to stamping, a solid guarantee for the reliability of your products.
Contact us
If you are evaluating the long-term reliability and batch consistency of relay magnetic circuit components, we can provide structural optimization and material selection support based on your application scenario to help you achieve a better solution between performance and manufacturing cost for the armature for Electromagnetic Relay.
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