This article introduces relay roles and product information focusing on charging station use.
What is a charging station?
A charging station plays an important role in supplying electricity to electric vehicle (EV) and plug-in hybrid vehicle (PHV). Relays used for the DC side (for switching direct current loads) of charging stands are required to provide high capacity DC cutoff capabilities and high reliability since they are used as safety cutoff relays in the event of defects and failures of a vehicle’s battery and charging system. In addition, relays used for the AC side (for switching alternating current loads) of charging station are required to provide high capacity AC cutoff capabilities and high reliability since they are used as safety cutoff relays for power grids to prevent anomalies in charging stands from impacting commercial power supply circuits. Next, let's examine these applications in more detail.
Relay roles and product information
(1) AC side safety cutoff
Relays are used for safety cutoff purposes for the AC side power grid of a charging station. When an abnormal current is generated, it is important to securely cut the current so that it doesn't impact the charger or DC side power supply. High capacity relays are required as safety measures for protecting such electric power systems.
Recommended high capacity AC relays
▼ Detailed information
- Click here to visit HE-N relay website
- Click here to visit the PV type HE relay website
ｰ Click here to visit the HE-S relay website
- Click here to visit the LF-G relay website
▼ CAD/Catalog download
- Click here to download HE-N relay information
- Click here to download the PV type HE relay data
- Click here to download the HE-S relay data
- Click here to download the LF-G relay data
Proposal for engineers!!
Simply incorporating one Panasonic 2a1b type HE-S relay in your system allows you to easily create safety cutoff and contact welding monitoring circuits as additional safety measures.
(One HE-S relay can check two lines, but two are required for circuits using 3-phase four lines.)
| ※HE-S relay use case |
* 2a1b type x 1 (use image) |
<HE-S relay>
- Click here for detailed information.
- Click here to download the CAD and catalog data
(2) DC side safety cutoff
If defects and failures occur with the batteries and charging systems, then it is necessary to immediately stop the supply of power. High capacity relays can securely cut the power and are effective safety measures.
Recommended high capacity DC relays
（1a 80A-300A 1,000V DC ※）
※1,000 V DC is the Max. switching voltage. The rating is 400 V DC.
- Click the photograph of each product series to visit the website containing the corresponding detailed information.
<EP relays>
- Click here to download the CAD and catalog data
Panasonic offers a variety of automotive relays suitable for automotive electric parts, including EV relays that contribute not only to the safety of charging stands but also to that of electric vehicle (EV) and plug-in hybrid vehicle (PHV). Please consider using Panasonic products when you investigate the use of relays for automotive applications.
<EV relays>
- Click here for detailed information.
<Automotive relays>
- Click here for detailed information.
Was it clear that high capacity relays are useful as safety cutoff relays for the AC and DC sides of charging station?
* From a safety perspective, the use of our relay requires manufactures to confirm specifications and conduct evaluation test. Please understand that safety considerations prevent us from receiving inquiries from or dealing with private customers.
