High-voltage relays in new energy vehicles are the control switches for the entire vehicle's high-voltage circuit, responsible for controlling the on/off circuits of the battery, motor, and charging system. Their operational stability directly determines the safety of the three-electric system (battery, motor, and electronic control system). The armature inside the device, as the core of the magnetic circuit transmission, has its material and forming precision constraining the relay's engagement response, vibration resistance, and wide-temperature operating capability. Precision Stamped EV Relay Armature, with its integrated high-precision stamping process, has become the mainstream magnetic component for automotive high-voltage relays. When the coil is energized, it generates a magnetic field that attracts the armature, causing the contacts to complete the circuit connection. After the power is cut off, the armature resets and cuts off the circuit. The accuracy of the entire operation depends entirely on the quality of the armature's machining.
High-voltage DC conditions generate high-intensity electric arcs, which continuously wear down the contacts and internal magnetic circuit components. Ordinary stamped armatures are prone to dimensional deviations, residual internal stress, and excessive residual magnetism, making them unsuitable for long-term use on 400V to 800V high-voltage platforms. The Relay Armature Plate Terminal uses high-purity electric pure iron as its base material. The raw material is pre-leveled and stress-relieved, reducing magnetic performance degradation and component warping defects from the source. This effectively reduces armature deformation and reset hysteresis caused by arcing impacts, extending the relay's lifespan to millions of cycles.
With the trend towards smaller and lighter vehicles, the internal structure of relays is increasingly compressed, and armature designs are becoming thinner and more irregular, placing stringent demands on manufacturing tolerance control. The Electrician Pure Iron Armature utilizes a multi-station progressive die high-speed stamping process, ensuring dimensional tolerances are stably controlled within 0.01 mm. This results in high-dimensional consistency across batches, making it suitable for automated assembly lines. It balances weight reduction requirements with mechanical fatigue resistance, mitigating component failures caused by vehicle vibrations.
Stamping leaves mechanical stress within the soft magnetic material, disrupting the internal magnetic domain arrangement, significantly weakening permeability, and reducing the relay's magnetic attraction efficiency. The Armature Metal Parts of Relays features a vacuum hydrogen-protected annealing process, precisely controlling temperature to eliminate stamping stress and restore the material's original soft magnetic properties. Subsequent deburring and surface anti-corrosion treatments broaden the component's applicable temperature range to -40℃ to 125℃, adapting to various extreme automotive operating environments across China.
The armature's performance directly affects several core parameters of the high-voltage relay, including pull-in/release speed, overload tolerance, and electrical life. Inferior armatures are prone to causing pull-in delays, contact adhesion, and insulation overheating, significantly increasing the overall high-voltage safety risks in the vehicle. The New Energy Vehicle Relay Armature's complete material, stamping, and heat treatment process system stably maintains magnetic permeability, reducing performance degradation under long-term high-frequency operation, meeting the high reliability design standards of automotive high-voltage devices.
Automotive high-voltage relays are widely used in battery management systems, fast-charging circuits, and high-voltage control scenarios for air conditioning compressors. Different operating conditions have different requirements for armature magnetic properties and structural strength. In addition to verifying voltage and current parameters, the selection process in the industry also requires careful verification of the EV Relay Magnetic Armature's processing technology and weather resistance to avoid vehicle circuit failures caused by defects in magnetic circuit components. With the gradual popularization of 800V high-voltage platforms, the market demand for high-precision soft magnetic stamped parts continues to rise, making armature processing precision and material modification technology core directions for industry iteration.
Combined with the current upgrade trend of high-voltage systems in new energy vehicles, the market demand for high-precision soft magnetic stamped parts continues to expand. Component solutions with full-process machining capabilities are more suitable for the bulk supply needs of automakers. Our mass-produced Precision Stamped EV Relay Armature strictly adheres to the entire process of raw material selection, micron-level stamping, and vacuum annealing. Its magnetic properties, dimensional tolerances, corrosion resistance, and temperature resistance all meet automotive high-voltage standards. Customization of irregular structures is supported, and it is compatible with various specifications of automotive relays. For sample testing data, customized solutions, and bulk purchase quotations, engineering and purchasing personnel are welcome to consult with us.
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