Charging Stations

Campus charger stations 

  • Works for electric vehicles, hybrid vehicles, and plug in hybrids
     

  • Combined Charging Station are used for charging electric vehicles using the combo 1 and combo 2 connectors at up to 50 – 350 kW. 
     

 

Type of charging stations Connectors  

 

  • Type 1 (SAE J1772) also known as the “J plug”, is a North American standard for electrical connectors for electric vehicles maintained by the SAE International 
     

  • The J1772 connector is designed for a single phase electrical systems with 120V (AC Level 1) or 240V (AC Level 2) in North America  
     

  • The connector is designed to withstand 10,000 cycles (connection and disconnection). The lifespan should approximately last 27 years.
     

  • SAE is developing a combined charging system with a combo coupler like the J1772-2009 connector with additional pins to accommodate fast DC charging at 200-450 volts DC and up to 90 kW. This will also use powerline communication technology to communicate between the vehicle, off board charger, and smart grid.
     

    • DC level 1: 200-450V 80A (36kW)

    • DC level 2: 200-450V 200A (90kW)

    • DC Level 3: 200-600V 400A (240kW)
       

  • CCS Version 1.0
     

    • Power: < 80kW

    • Voltage: < 400V

    • Current: < 200A​
       

  • CCS Version 2.0 (2018)
     

    • Power: < 350kW

    • Voltage: 200-1000V

    • Current: < 400A

  • Too much current
     

    • The CCS V1.0 allowed DC charging only with currents up to 200A, which aren’t sufficiently cover the needs of the future charging infrastructure. With the new version, CCS 2.0 the current was raised by double the number of CCS 1.0 giving it a 400A. This can lead to problems that require large cables to be used, which are heavy and stiff cables, or require cooling, compared to the thinner wires used. Development is in the process to add in thermal sensing, cooling and silver plating of the contacts. 

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  • The SAE Combo is compatible with GM, BMW’s, Volkswagen, Porsche, Mercedes Benz, and Ford

  • Combo 1 DC limit is 15-60 min of charging 

  • The J plug limit is 4-8 hours of charging

 

The J plug seems more realistic on the school side perspective since students will be in classes all day while the car is charging without the worry of over charged when gone. Another perspective to look at is how the school will make money off the spots that are only exclusive to EV students. This can be solved if UH sells a EV permit for that garage where the student is charged for the electricity into the car if they choose to charge it on campus while also a promised parking space. 

 

            Alternative Idea: UH will sell permits to the EV students, permitting that they get charged while charging their car by the hour, once it’s done charging be allowed to relocate their vehicle in the garage. The EV permit will be used on the pump to start, like when you swipe your garage permit to get in the garage. If the student wishes to leave the car in the station after its done being charged it can pay a parking fee by UH standards per hour. The Garage will carry Level 2 charging to ensure a faster charging rate for more students to use it. 

 

The EVolnnovate by EVoCharge charging station was picked out for the garage. 

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  • Has a Universal SAE J1772 connector compatible for every electric car and plug- in 
     

  • Can be hardwired into the electric panel to ensure anti-theft from plug in stations
     

  • Power: 7.7kW
     

  • Current: 32A
     

  • Voltage: 240V
     

  • 18’ cable starting price: $799.00
     

  • 25’ cable starting price: $839.00