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Home Semiconductor AUTOMOTIVE ELECTRONICS

High Power PCB relay paves the way for faster and more compact EV charger wallboxes

Nimish by Nimish
July 15, 2024
in AUTOMOTIVE ELECTRONICS, Product News
Reading Time: 2 mins read
OMRON G9KC Relay

OMRON G9KC Relay

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Hoofddorp, The Netherlands – Omron Electronic Components Europe has launched a new high power PCB relay for use in AC wallboxes for Mode 3 AC EV charging stations. The G9KC relay provides the lowest contact resistance available on the market and produces significantly less load terminal heat rise when in operation compared to equivalent devices. This opens new opportunities for designers and manufacturers of EV chargers to create systems that can charge faster and more efficiently, with a higher reliability and expected lifetime.

As electric vehicles (EVs) grow in popularity, demand for dependable and high-speed EV supply equipment (EVSE) or EV chargers is also rapidly increasing. Improved charging speeds can be achieved by using higher charging currents; however, this requires the use of higher rated electronic components, resulting in the generation of more heat inside the wallbox enclosure.

Higher temperatures within the wallbox can significantly affect charging performance and efficiency and can cause temporary limitations on charging power. Furthermore, increased heat cycles and heat levels can also cause components to wear prematurely and fail. Balancing the increasing amounts of heat dissipated by higher power components, with the desire to reduce overall system footprint, is therefore a major challenge for designers of EV charging infrastructure.

Omron’s G9KC relay utilizes an optimized structure which includes a mechanically coupled, double break contact design for demanding AC wallbox and Pedestal Charger designs for use in home, workplace, commercial and industrial settings. Designed and developed to high Japanese standards its aim is to offer an improvement in energy efficiency while reducing heat dissipation. As a result, G9KC contributes effectively towards the overall reduction in operating temperature in a typical 22 kW (max 32 A/Phase) wallbox. This not only facilitates faster, more efficient charging, but also unlocks new possibilities for wallbox designers to develop more compact and robust designs.

The relay’s 4-pole structure means that a single device can replace larger multi-pole Contactors and combinations of 1 and 2 pole, reducing the footprint required. With a guaranteed initial contact resistance of less than 6 mΩ it has the potential to contribute less as a hotspot while improving charging efficiency and performance. The G9KC’s lower operating temperature reduces the likelihood in the number of charge cycles reaching charging current throttling thresholds, while also contributing to improved reliability and longevity of the relays themselves, as well as surrounding components.

Unlike Contactors, the G9KC can be mounted on a printed circuit board (PCB), which can help to facilitate smaller and lighter designs in a variety of products including EVSE/ Chargers, UPS, Grid Interactive and commercial and industrial inverters and converters. G9KC has been approved by safety standard certification authorities of UL/C-UL, TUV and CQC, and has been designed to meet the requirements of IEC 62955 – Residual direct current detecting device (short circuit capability), and IEC 61851-1 – Electric vehicle conductive charging systems, alongside a wide range of other relay safety applicable standards.

For more information on the G9KC, please visit: https://components.omron.com/eu-en/products/relays/G9KC

Tags: G9KC relayOmron Electronic Components EuropePCB relay
Nimish

Nimish

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