How do high-voltage EV relays operate stably using the Stamped Armature Plate for High-Voltage EV Relay?

Relays are core electronic control switches in the high-voltage systems of new energy vehicles. They rely on electromagnetic structures to isolate and connect high and low voltage circuits. The precision of the electromagnetic actuator directly determines the relay's withstand voltage, current-carrying capacity, and lifespan. The Stamped Armature Plate for High-Voltage EV Relay is a core component of the armature assembly of electromechanical high-voltage relays. It replaces traditional machining with precision stamping, adapting to the high-frequency engagement requirements under high-voltage, high-current conditions in vehicles. Traditional armature machining processes suffer from large forming errors and unstable magnetic permeability. Stamping ensures uniform sheet thickness and flatness, providing hardware support for stable electromagnetic attraction in high-voltage relays.

High-voltage relays are broadly classified into electromechanical and solid-state relays. Solid-state devices have no moving mechanical parts, while electromechanical structures are still widely used in vehicle high-voltage power distribution and battery circuit switching. The armature, as the component that transmits magnetic field forces, directly impacts the relay's failure rate. The New Energy Vehicle Relay Armature, with its integrated stamping advantage, can uniformly conduct the coil's magnetic field attraction, reducing common automotive malfunctions such as engagement jamming and contact burning. After the primary control coil is energized and generates a magnetic field, the armature is forced to open the high-voltage circuit by connecting the contacts. The stamped armature has lower magnetic losses, making it suitable for the 12V low-voltage control driving high-voltage power battery operating logic of new energy vehicles.

High-voltage relays of various specifications, including normally open, normally closed, latched, and double-pole double-throw, all have differentiated design requirements for their internal armature structures. Different switching logics have varying requirements for armature flatness and elastic deformation thresholds. The EV Relay Magnetic Armature allows for adjustments to the sheet metal openings and bending structures through customized stamping dies to match the switching stroke of various relay contacts. Normally open relays normally disconnect high-voltage loads, normally closed relays normally maintain circuit continuity, and double-throw relays can switch between two loads. Customized stamped armatures can adapt to all mainstream relay structures, balancing mass production efficiency with electromagnetic performance consistency.

The instantaneous de-energization of the electromagnetic coil generates a reverse high-voltage spike, which can easily damage automotive control chips. The industry commonly uses a freewheeling diode to absorb the reverse electromotive force. However, the hysteresis characteristics of the armature exacerbate voltage fluctuations during magnetic field collapse. The Soft Magnetic Armature for EV Relay uses low-hysteresis cold-rolled steel for stamping, which weakens the spike amplitude caused by sudden magnetic field changes and reduces the load on the freewheeling diode. Stamping technology allows for precise control of armature material ratios and sheet density, reducing hysteresis losses and optimizing the high-voltage relay's protection capabilities for the entire vehicle's electrical system from the armature structure level, thus extending the lifespan of the vehicle's electronic control components.

High-voltage systems in new energy vehicles place stringent requirements on relays' vibration resistance and high-temperature resistance. Vehicle vibrations and high engine compartment temperatures can exacerbate armature deformation and failure. Stamping can simultaneously perform edge chamfering and stress relief treatment, improving structural stability. The Pure Iron Armature for EV Relay is seamlessly integrated, making it less prone to deformation and demagnetization under the complex temperature and vibration conditions of an automotive environment. Compared to machined armatures, stamped parts have smaller dimensional tolerances and lower mass production costs, making them the mainstream solution for high-voltage main relays and charging relays in new energy commercial vehicles and passenger cars, supporting the safe and stable operation of onboard high-voltage electrical systems.

Commercially available stamped armature relays often fail to meet the customized performance requirements of high-voltage relays for various vehicle models. Our self-developed and mass-produced Stamped Armature Plate for High-Voltage EV Relay utilizes low-hysteresis specialized materials and undergoes precise stamping throughout the entire process to control tolerances. It is compatible with all types of high-voltage relays for charging, battery, and thermal management, is resistant to high and low temperatures and vibrations, and offers stable batch delivery. Customized drawings and sample testing services are available upon request. We welcome relay manufacturers and new energy component companies to inquire about sample testing and bulk purchasing.