Armature Metal Parts Of EV Relays
Products Description
This series of Armature Metal Parts of EV Relays uses high-purity electric pure iron as the main base material and is processed through high-precision stamping and forming processes. They are widely used in:
Electric vehicle relay magnetic circuit systems (yoke/armature)
Electromagnetic actuators for new energy relays
Key metal structural components for high-voltage DC contactors
Enclosures and magnetic conductive assemblies for high-voltage switches and control modules
The products are designed around four main principles: high permeability, low loss, dimensional stability, and batch consistency, balancing electromagnetic performance and structural reliability.
Material Selection and Comprehensive Magnetomechanical Performance
We exclusively select top-grade electrical pure iron materials (DT4E or equivalent), with micro-controlled silicon and aluminum content and extremely low impurities, ensuring ultra-high initial permeability and extremely low coercivity, while also possessing excellent stamping formability and fatigue strength. Compared to ordinary soft magnetic steel, this pure iron exhibits lower losses and a higher saturation point under repeated magnetization, supporting higher coil currents and stronger holding forces.
After stamping, the material grains are further refined, enhancing ductility and enabling it to withstand millions of impact cycles without brittle fracture. Standard phosphating or environmentally friendly passivation treatments enhance resistance to damp heat corrosion while maintaining a clean magnetic surface free of oxide layer interference for Relay Terminal Armature.
This in-depth optimization of materials not only meets the dual requirements of rapid magnetic response and mechanical toughness for new energy relays but also provides Electrician Pure Iron Armatures with sustained performance stability and safety redundancy in automotive-grade high-temperature start-up, low-temperature holding, and salt spray corrosion environments.
Manufacturing Process and Advantages: Precision Determines Performance
| High-Speed Precision Progressive Stamping Technology | The manufacturing process utilizes internationally leading high-speed precision stamping presses and multi-station progressive dies. Stamping speed, feeding accuracy, and die clearance are all at the top level in the industry. Especially for the Armature in relay bending process, we employ CNC bending mandrels and precision forming stations, effectively offsetting the material springback effect and ensuring precise and consistent armature angles. |
| Key Stress-Relief Annealing Process | This is the "soul process" in manufacturing. The stamped Armature Metal Parts of Relays contains significant internal stress, which not only affects dimensional stability but also severely deteriorates magnetic properties (increased coercivity). We use a full-hydrogen-enclosed bright annealing furnace to perform stress-relief annealing under strictly controlled temperature profiles and a protective atmosphere. This process eliminates work hardening, restores the integrity of the grain structure, and restores the armature's permeability to the raw material level. This is a key manufacturing advantage, ensuring the high sensitivity of the relay. |
| Automated Surface Treatment | Due to the susceptibility of electric pure iron to corrosion, Armature for Electromagnetic Relay components require strict surface protection. We use automated nickel plating or phosphating production lines to ensure a uniform and dense plating layer, free from hydrogen embrittlement. |
Application Advantages and Deep Adaptation to New Energy Scenarios
Main High-Voltage DC Relay
Corely used for battery pack positive and negative terminal disconnection and pre-charge circuits, its rapid engagement ensures reliable closure under high current, supporting 1000V+ platforms and continuous loads of hundreds of amperes.
Auxiliary and Functional Relays
In PTC heating, air conditioning compressors, and DC-DC control, a lightweight design reduces overall power consumption, improving vehicle energy efficiency and range.
Charging System Contactor
The integrated enclosed Relay Armature Soft Magnetic Iron provides additional rigidity and shielding, adapting to the high-frequency operation of charging piles and outdoor temperature variations, ensuring zero delay and safe isolation during fast charging.
Distributed Electronic Control Unit
The small, precision Relay armature plate supports compact integration of multiple control channels, and its vibration resistance meets the complex operating conditions of the vehicle chassis.
contact us
If you require material selection, structural coordination, or prototype verification for your relay or high-voltage DC contactor project, please submit your engineering requirements. We will support your design and mass production with our mature experience in electromagnetic component manufacturing.
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