The Precision Stamped EV Relay Armature is the core movable actuator in the magnetic circuit system of a high-voltage DC relay, performing the crucial function of converting electromagnetic energy to mechanical energy. When the relay coil is energized, this component displaces under the action of electromagnetic force, driving the contacts to close. After the coil is de-energized, the armature quickly resets under the action of spring force, achieving reliable circuit disconnection.

This product is made of pure iron (DT4C/DT4E grade) through precision stamping and is specifically designed for high-voltage platforms of 800V and above in new energy vehicles. Its core magnetic performance indicators, such as permeability, coercivity, and saturation magnetic induction intensity, directly determine the relay's pull-in time, release time, holding force, and electrical life. In scenarios such as battery pack main circuit switching, pre-charging circuit control, and high-voltage isolation of fast charging piles, the armature's response speed and consistency of action are the first line of defense for ensuring the electrical safety of the entire vehicle.

Product Advantages

Material Purity Lays the Foundation for Electromagnetic Performance

DT4E grade electric pure iron is selected, with a carbon content of ≤0.025% and strictly controlled total impurities. The high-purity matrix endows the Pure Iron Armature for EV Relay with low coercivity and high saturation magnetic induction intensity (Bs≥2.15T), ensuring rapid demagnetization and release after the coil is de-energized, preventing relay sticking and failure.

Precision Stamping Ensures Consistent Air Gap

The static air gap between the moving iron core and the yoke is the core-determining factor of the relay's pull-in voltage and release voltage. This product boasts a flatness control of ≤0.03mm and a three-dimensional positional tolerance of ±0.05mm, ensuring that each Soft Magnetic Armature for EV Relay unit requires no secondary calibration after assembly, significantly narrowing the operating voltage fluctuation range.

Heat Treatment Process to Release Processing Stress

After stamping, the New Energy Vehicle Relay Armature undergoes low-temperature stress-relief annealing to eliminate residual stress concentration at the cutting edge and bending area. This stabilizes dimensions while restoring the magnetic domain orientation damaged during stamping, ensuring uniform magnetic properties.

Pure Iron Coil for Precision Stamped EV Relay Armature

Product Details and Features

Working Surface Flatness

After annealing and finishing, the flatness of the Relay Armature and the yoke pole surface is controlled within extremely tight tolerances, ensuring uniform closed air gaps and avoiding localized magnetic saturation and attraction bias.

Blanking Section Quality

The transition between the bright band and the sheared band at the blanking edge is clear, without burrs or flanging. Burrs may form localized carbide accumulations during annealing, affecting magnetic uniformity.

Rounded corners and deburring

The edges of the Movable Armature Plate for EV Relay are rounded to prevent damage to the coil insulation or other components during assembly, while ensuring operational safety.

Surface texture optimization

Specific texture design optimizes the magnetic field distribution of the Armature for the Electromagnetic Relay, enhancing magnetic retention.

Detailed Display of the Precision Stamped EV Relay Armature

Balancing High Voltage and Miniaturization Requirements	800V and above platforms require relays with larger creepage distances, compressing magnetic circuit space. High magnetic induction strength Armature Metal Parts of Relays achieve the same magnetic permeability with a thinner cross-sectional area, freeing up space for miniaturization and high-voltage insulation design.
Anti-Welding Support under Extreme Breaking Conditions	During short-circuit breaking, enormous arc energy and electromechanical repulsion are generated between the contacts. The high-strength Relay Armature Plate Terminal structure provides stable mechanical support at this time, preventing magnetic circuit deformation that could lead to absorption collapse, and quickly extinguishing the arc using the arc-extinguishing magnetic field.
All-Weather Zero-Failure Commitment	Whether it is the long-term high-temperature environment of the power battery or the extremely cold charging scenario, the stress-relief annealed Pure Iron Armature for EV Relay eliminates the deformation risk caused by internal stress release, ensuring a high degree of consistency of air gap and suction characteristics in different temperature ranges.

Precision Stamped EV Relay Armature Application Scenarios

For further confirmation on the compatibility details of the Precision Stamped EV Relay Armature, to obtain a complete performance test report, or to initiate the sample application process, please feel free to contact our engineering team.