ChaDeMO charge project

The Lotus Elise ECE EV conversion is based on the AC-150 Gen 2 from AC Propulsion. Unfortunately the AC-150 Gen 2 is developed before any charging standard was published. Charging is managed by de PEU (Power Electronics Unit) and is limited to 20KW (240V/83A one phase). 83A on one phase is way more than a standard household wall outlet in Europe provides. Home charging on a standard 240V wall outlet is limited to 16A. Public charging using the Mennekes connector is also limited to 16A (one phase). In Holland most modern houses have a 3x25A powerline which can often be upgraded to 3x35A without replacing de powerlines to the power company . 35A is better than 16A but it isn’t real fast charging.

An alternative would be public DC fast charging, But which standard should be used in a DIY install. ChaDeMo is getting popular in Holland. Currently (begin 2016) there are over 100 ChadeMo fast charge stations. So ChaDeMO would be the wiser choise. Currently there are a few suppliers of ChaDeMo interface which work on any EV. EVWest developed the jld-505 and Lithium Balance sells the LiBal Fast Charge interface for €1000,- or more.

For both interfaces the challenge would be how to integrate them into my EV. I think it might be easier to develop a custom interface based on the ChaDeMO standard and the information available on internet.

CHAdeMO interface

CHAdeMO interface





6 thoughts on “ChaDeMO charge project

  1. How about wiring in 3 Lear chargers from a chevy volt / opel ampera? This would give you three phase charging at the public stations, I know that most Chademo stations in Holland charge quite alot of money per KwH.

    The communction protocol for Chademo is avaliable if you know where to look, some guys even made arduino code that will run it.

    Depending on your use of the car maybe creating offboard chargers to use at home would be easier/simpler.

    • I thought of that but I don’t want to loose the already small lugage space. I have one brusa 513 charger which I could add. I looked at the Brusa 664 (3x400V) but it is expensive. The batteries I have are able to charge at 200A, The ChaDeMo schould give me 125A max. I already have all the parts, I just need some time to get the project started.

      At home I charge on a 32A socket. Red CEE 3+N+E.

      • So you currently charge at 240V 32A? only 7 Kw which is quite reasonable if you think of it, you just have to wait long between trips.

        I taught that most public charging ports were three phase.

        You found the EVTV github page with the complete chademo sketch on it?

  2. If you can get the information of the EV canbus easily the programming for chademo is quite simple and straight forward. The wiring up of the electrical side is even easier then writing the code.

    However in the Netherlands charging via Chademo is quite expensive.

    So at home you only charge at 240V 32A?
    Possibly you can build a home brew DC charger to use your full 240V 32A 3 phase instead of a single fase. This however would mean you would need both sides of the Chademo plug, or another connector rated at these powerlevels.

  3. My house has a 3x25A connection so I can charge at 25A but I have set the charge limit at 18A to leave some room for other appliances. The AC-150 is capable of charging at +/- 80A on a single phase 240V line (20KW). I don’t want to upgrade to this high current, not even talking about the yearly fee. For me charging at home or at work doesn’t need to be fast, I just want to be able to quick charge on the highway and not have to spend many hours on at the charging station.

  4. Then Chademo is the best solution so far. Hope you post your findings on here.
    Saw that you are quite capable with pcb design and some software so this should be easy for you.

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