How to Choose High-Quality Armature Metal Parts for EV Relays?

The armature is a general-purpose magnetic component for electromagnetic energy conversion, performing drastically different functions in motors and relays. Motor armatures rely on windings to continuously convert electrical energy into mechanical energy, while the armature of a new energy vehicle relies only performs reciprocating magnetic attraction motion, driving contacts to open and close the high-voltage circuit. Armature Metal Parts for EV Relays, as dedicated magnetic metal components for relays, are made of soft magnetic steel, adapted to the short-time, high-frequency engagement logic of vehicle operation, and are significantly different from motor armatures in structure and material selection.

An electromagnetic relay consists of a coil, an iron core, an armature, a return spring, and contacts. When the coil is energized, it generates a magnetic field, causing the armature to close due to magnetic force. When the power is off, the spring pulls the armature back to its original position, breaking the circuit. Vehicle vibrations and alternating high and low temperatures in the engine compartment can disrupt the magnetic stability of the armature. Armature for Electromagnetic EV Relay utilizes precision molding processes to control flatness and thickness tolerances, ensuring uniform and stable magnetic permeability. This reduces common high-voltage circuit faults such as contact jamming and adhesion, making it suitable for the harsh operating environment of vehicles.

The armature consists of two parts: the armature core and the functional substrate. Motor armatures require matching winding slots, while relay armatures have no winding structure, serving only as a magnetic force carrier. The industry generally uses high-purity electric pure iron and low-hysteresis cold-rolled steel as raw materials. EV Relay Armature Pure Iron Plate abandons complex slotting designs, simplifying the molding process while balancing high magnetic permeability and low coercivity. It can quickly demagnetize after a power failure, preventing residual magnetic fields from preventing proper contact separation.

Relays come in various structures, including normally open, normally closed, changeover, and double-pole double-throw. Different models have different contact stroke and attraction force requirements, necessitating specific adjustments to the armature bending and opening dimensions. EV Relay Armature Soft Magnetic Iron can be customized with molds to adjust component shapes, matching various high-voltage relays in the main circuit, pre-charge circuit, and thermal management circuit of the power battery. This enables standardized mass production of multi-specification components, ensuring consistent electromagnetic performance.

The rapid dissipation of the magnetic field when the coil is de-energized generates a reverse high-voltage spike, which can easily damage the vehicle's control chip. The higher the armature hysteresis loss, the greater the voltage surge amplitude. EV Relay Armature Plates use low-hysteresis soft magnetic materials to weaken the circuit impact caused by sudden magnetic field changes, reduce the load on the freewheeling diode, optimize the high-voltage circuit protection capability of the entire vehicle from the magnetic component level, and extend the overall service life of electronic control components.

As new energy vehicles continue to upgrade to 800V high-voltage platforms, the vibration resistance, temperature resistance, and lightweighting requirements of relay components are becoming increasingly stringent. Traditional machining of armatures easily leads to stress concentration and dimensional deviations. New Energy Vehicle Relay Armature is integrally stamped, simultaneously completing stress relief and edge passivation treatments, with no splicing gaps, and stronger resistance to fatigue deformation. They have now become the mainstream magnetic metal parts for high-voltage relays in passenger cars and commercial vehicles.

Commonly available armature metal parts are often difficult to match the customized parameters of high-voltage relays from different automakers. Our standardized R&D and production of Armature Metal Parts for EV Relays uses automotive-grade soft magnetic materials with micron-level tolerance control. These parts are compatible with high-voltage relays for charging, battery, and thermal management scenarios. We support customized drawings, sample testing, and large-scale stable delivery. Both the overall magnetic properties and mechanical strength meet stringent automotive standards. We welcome relay manufacturers and new energy vehicle component companies to inquire about sample testing and discuss bulk purchasing cooperation.