Posts with «ev» label

Open Source Electric Vehicle Charging

Electric vehicles are becoming more and more common on the road, but when they’re parked in the driveway or garage there are still some kinks to work out when getting them charged up. Sure, there are plenty of charging stations on the market, but they all have different features, capabilities, and even ports, so to really make sure that full control is maintained over charging a car’s batteries it might be necessary to reach into the parts bin and pull out a trusty Arduino.

This project comes to us from [Sebastian] who needed this level of control over charging his Leaf, and who also has the skills to implement it from the large high voltage switching contactors to the software running its network connectivity and web app. This charging station has every available feature, too. It can tell the car to charge at different rates, and can restrict it to charging at different times (if energy is cheaper at night, for example). It is able to monitor the car’s charge state and other information over the communications bus to the vehicle, and even has a front-end web app for monitoring and controlling the device.

The project is based around an Arduino Nano 33 IoT with all of the code available on the project’s GitHub page. While we would advise using extreme caution when dealing with mains voltage and when interfacing with a high-ticket item like an EV, at first blush the build looks like it has crossed all its Ts and might even make a good prototype for a production unit in the future. If you don’t need all of the features that this charging station has, though, you can always hack the car itself to add some more advanced charging features.

EMW kick-starts JuiceBox, a $99 Level 2 DIY charging station

Electric vehicle charging stations aren't cheap: one of the most affordable Level 2 (240V) units sells for $450 and only supplies 16A. Electric Motor Works (EMW) -- which is best known for its electric conversion kits -- wants to change this with JuiceBox, a 15kW Level 2 EV charger that costs just $99 in kit form (plus $10 shipping). The device, which is launching on Kickstarter today, supplies up to 62A and operates on both 120V and 240V. It's built around an Arduino microcontroller and EMW is making both the hardware and software open source.

But wait, there's more! The company is also crowdfunding a Premium Edition of JuiceBox ($199 in kit form) which adds time-of-day charging, a color LCD, ground-fault plus output protection (for outdoor use) and a unique enclosure (hopefully as funky as the one in the picture above). While the DIY kits only require basic assembly and soldering skills, you'll be able to buy fully assembled versions for $100 more. At $329 (shipped), a ready-to-use JuiceBox Premium Edition undercuts other similar charging stations by several hundred dollars. The catch? You'll have to supply your own cables (or buy them separately from EMW), including one with a standard J1772 EV connector. Hit the source link below to check out the campaign, and take a look at the PR after the break.

Filed under: Transportation


Source: EMW (Kickstarter)