Precision Stamped EV Relay Armature
Products Description
The Precision Stamped EV Relay Armature typically serves as the "moving core" in an electromagnetic system, forming a complete electromagnetic actuation unit together with the fixed yoke, coil, and contact system.
Core structural forms include:
EV Relay Moving Armature
Electromagnetic Moving Plate
Precision Magnetic Arm
Spring-loaded Armature Assembly
Laminated Armature Stack
HV Contactor Moving Core
Its core functions include:
Receiving electromagnetic force to drive mechanical movement
Controlling the magnetic circuit closure and opening
Transmitting the attraction force to the contact system
Controlling the relay's operating rhythm and stability
Cooperating with the spring system to achieve a rapid reset
Technical Highlights & Validation Details
Shear Zone Ratio Control
The proportion of the shear zone on the stamped section of the moving spring is strictly controlled to over 70%, with a minimal break zone free of tearing burrs. The high-smoothness edge of the section significantly reduces microscopic geometric gaps, preventing early initiation of fatigue cracks.
Armature Residual Magnetism Elimination Test
Each batch of Stamped Armature Plate for High-Voltage EV Relay components undergoes an air gap magnetic flux decay test before leaving the factory to ensure the annealing process fully meets standards. The magnetic rebound response time is on the order of tens of microseconds, 100% eliminating relay disconnection adhesion caused by electromagnetic residual magnetism.
Dynamic Contact Stress Simulation Calibration
The initial geometry of all Precision Stamped EV Relay Armatures undergoes a 1:1 three-dimensional nonlinear dynamic simulation to ensure that the dynamic shear strain at every point during billions of reciprocating motions of the spring remains below the absolute safe fatigue limit of the material.
Detailed Showcase: Dynamic Engineering Aesthetics Within Micrometers
To demonstrate our differences from ordinary stamped parts to professional customers, the following details deserve scrutiny during engineering reviews:
Extrusion-Enhanced Inner Corner: Under magnification of the bending area of the moving spring, a continuous, smooth extrusion-enhanced band is visible at the inner corner, free of any microcracks. This indicates that the material did not exceed its yield strength during bending, and the grain lines were not disrupted, forming the basis for a million-cycle lifespan.
Micro-Concave Design of the Contact Welding Platform: The pre-reserved contact welding surface on the moving spring is not perfectly flat, but features extremely small concave or annular grooves. This helps the molten metal spread evenly under capillary action during laser welding of the contact points, preventing solder overflow from affecting the dynamic balance of the moving spring.
Endoscopic Treatment of Armature Edges: The non-mating edges of the Pure Iron Armature for EV Relay are endoscopically polished or die-cut, removing sharp stamping burrs. This avoids scratching the insulating film during relay assembly and prevents potential localized magnetic flux leakage at sharp corners.
Main Functions: The Triple Core Mission of the Relay Dynamic System
| Terminal Execution of Magnetic Circuit Closure | The EV Relay Magnetic Armature is the movable terminal of the magnetic circuit system. When the electromagnetic coil is energized, it responds to the magnetic attraction, overcomes the spring restoring force, and moves towards the iron core, completing the magnetic circuit closure. Its motion characteristics-starting voltage, operating time, and engagement speed-directly determine the relay's response performance. |
| Mechanical Carrier of Elastic Energy Storage | The elastic deformation of the New Energy Vehicle Relay Armature stores mechanical potential energy, which is released when the coil is de-energized, driving the contacts to quickly break. The magnitude and release rate of the elastic energy directly affect the contact's breaking speed and arc-extinguishing performance, especially critical in high-voltage DC breaking. |
| Transmission Hub for Force-Displacement Transmission | The Armature Metal Parts of Relays converts electromagnetic attraction into mechanical displacement and transmits the displacement and force to the moving contacts through the transmission interface. The stiffness, clearance, and damping characteristics of the transmission chain are all controlled through the geometric and material design of the armature. |
Contact us
We not only provide precision-stamped Pure Iron Armature for EV Relay components, but also offer structural optimization and mass production engineering support for new energy electromagnetic systems. From magnetic circuit design collaboration to stable batch delivery, we help customers achieve more reliable system-level applications.
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