Reference design adds WiFi to EV charging stations

31st August 2016
Nat Bowers

The industry's first reference design that adds WiFi connectivity to an EV charging station has been unveiled by Texas Instruments. EV owners will now be able to remotely monitor and control the charging of their vehicles from just about anywhere with WiFi, presenting dozens of potential use cases from home automation to checking the availability of nearby public charge points.

Battery technology advancements and government regulations have resulted in a growing number of new EVs around the world. But EV makers still need more charging stations to make it easier for drivers to charge their vehicles. This reference design uses TI’s SimpleLink WiFi wireless MCU technology that allows design engineers to create stations that intelligently charge at non-peak times or detect and communicate when a charging station is available.

Faster, smarter charging

One barrier to widespread EV charging station adoption is the amount of time it takes to charge a vehicle. The reference design supports Level 1 charging, which is compatible with household outlets, as well as Level 2 EV charging, which helps vehicle owners tap into higher current (15A to 30A and higher) connections available in commercial office buildings. Level 2 chargers typically take up to eight hours to fully charge the vehicle if the owner wants to plug it in while at work.

Later this year TI plans to introduce a Level 3 EV direct-current charger reference design scalable to 600V and 400A that cuts charging time down to only 20-30 minutes - enough time to stop at a WiFi enabled restaurant that has a charging station and charge the vehicle during lunch.

TI accelerates innovation for EVs and EV charging stations with its comprehensive portfolio of embedded processors and analogue technologies, proven system expertise and reference designs focused on faster time-to-market. Advancements in TI’s battery management, current sensing, power management, analogue signal chain and MCU products are leading to lighter electric and hybrid vehicles that can travel longer distances without the need to recharge. And once they do, TI helps make charging more convenient by enabling smarter stations that charge faster than ever before.

EV Charging Station with WiFi reference design

Download the EV Charging Station with WiFi reference design.

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