Dual-phase 2x faster home charger

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Piro

Well-known member
Joined
Feb 19, 2017
Messages
47
Location
Kraków, Poland
This is my last project - 4.4-4.8kW 2-phase Type1 portable electric car charger at your home - without special 32A power lines...
It uses 3phase power connection to generate one "superphase" and charge Type1 cars (Leaf). 2 phases are loaded equally. It also has a special mode for battery safe Leaf charging - read below.

If you have Type1 EV Car (like US Tesla, Nissan Leaf, Mitsubishi Outlander PHEV etc) and 3-phase power in your garage, parking, home - this charger will accelerate your charging speed more than twice!
...and still can be used as normal 230V 10A charger.

Project page: http://evtun.com/type1-portable-charger.html
Crowdfunding: https://www.indiegogo.com/projects/accelerated-evse-charger-type1-2x-faster-car-electric#/

Typical speeds at home:
Tesla - 21-22 km/h ,(4,8 kW, 20A)
Outlander PHEV - 3,6 kW (factory onboard charger limits at 14 A),
Nissan Leaf - (4,8 kW, 20A)

https://www.youtube.com/watch?v=16XyFWsp7Uw

***** STORY - why I developed this charger, why it is really something new ******

Me & my Wife own two EV cars (Outlander PHEV and Nissan Leaf) and I’m electric car tuner (http://evtun.com). Main problem I have noticed while charging our EV cars at home is that we have 3-phase connection at home, but limited to 14,5A per phase (this is very common in Europe in small houses).
If you want to charge your EV car quicker, fuses will go off. 10A charger is a real maximum.
I decided to solve this in one step – intelligent 2-phase to „superphase” converter, that loads two phases equally. Also it monitors current and if you switch on something loading one of phases used, it will immediately reduce speed of charging of car to avoid fuses to react.

- My charger uses clever conversion from 230V phases to 240V „superphase” - this helps with another 5% acceleration because EV cars limit current and accept any voltage up to 260V.

- Beside of that, that my charger monitors phases load and reduces speed automatically if needed, you can also set basic speed as 8A (night charging), 16A (standard), 20A (fast).

- Z-wave is added, you can integrate charger with your home network.

- Charger uses profiled charging and voltage for cars with known issues or with extra capabilities:

1. Outlander PHEV – it blocks prebalancing (factory charger slows down to almost 1A, for 25 minutes if battery was empty) so Outlander charges full 3.6 kW every hour, including first hour (without that trick – 2.2 kW only within first hour). Superphase + blocking of prebalancing double the speed of factory 10A charger.
2. Nissan Leaf – charger charges it to 90% SOC, then stops, or 90% SOC, stops for 15 min to cool battery down and then – finishes charging (effectively this is faster and more safe for battery).

- I want to add bluetooth and RFID access (with cards or RFID tokens) and application to control more sophisticated parameters of charging / cooling battery.

- Charger will have detacheable 400V cable, so you may have more cables, for 230V or for 400V for instance if you take charger with you
 
Interesting, and you may already know this, but basically no residential homes in N. America has 3 phase power, although most can easily accommodate a 30a 240v outlet, giving us ~6.6kwh charging. Do your Leafs not charge up to 27.5a @ 240v like the N. American ones, or is it just your homes that don't generally have such high powered outlets/lines?
3-phase power is quite common in commercial/industrial building, either 208v(120v per phase) or 477v(277v per phase) but then again in commercial buildings you can easily find 30+a circuits, so again I can't see how your device would really benefit us in N. America. Seems like a cool idea for your neck of the woods though and I wish you luck :)
 
jjeff said:
Interesting, and you may already know this, but basically no residential homes in N. America has 3 phase power, although most can easily accommodate a 30a 240v outlet, giving us ~6.6kwh charging. Do your Leafs not charge up to 27.5a @ 240v like the N. American ones, or is it just your homes that don't generally have such high powered outlets/lines?
3-phase power is quite common in commercial/industrial building, either 208v(120v per phase) or 477v(277v per phase) but then again in commercial buildings you can easily find 30+a circuits, so again I can't see how your device would really benefit us in N. America. Seems like a cool idea for your neck of the woods though and I wish you luck :)

Yes, I know US power schema for houses and I think this solution is good for EU and other areas, where residential power for houses bases on 3 phase 14,5A or similar (3x16A fusing).

EU onboard chargers are limited to 15A each, 230V, US chargers are limited to 15A (first) and 12.5A (second, if exists), so there are small differences.
Leaf charges max 5.0 kW with my charger (250V * 20A), but I have a prototype of charger with 7.5kW charging (for EU version is 250V * 30A) - that seems to be limit for Leaf...
 
For those unfamiliar with the 3x16A CEE plug, it has 3 hot legs (separate phases). I think it looks like this:

https://www.ellies.co.za/product/multiplug-5m-cord-3x16a-3-way/

I read about another device which rectified the 3-phase power, then inverted it to 240v single-phase, to charge a Tesla (sorry, can't find the link). The maker spent 4,000 EU on it.

There is also a cable which claims to charge an EV at 11kw off a 3x16A CEE 3-phase receptacle. I'm not sure how this cable functions, costing only 400 EU:

https://eauto.si/metron-shop/product/type2cee-3x16a-3-phase/
 
specialgreen said:
For those unfamiliar with the 3x16A CEE plug, it has 3 hot legs (separate phases). I think it looks like this:

https://www.ellies.co.za/product/multiplug-5m-cord-3x16a-3-way/
https://www.chacon.be/en/outlet/137-outdoor-multiple-socket-3x16a-5411478467007.html

I read about another device which rectified the 3-phase power, then inverted it to 240v single-phase, to charge a Tesla (sorry, can't find the link). The maker spent 4,000 EU on it.

There is also a cable which claims to charge an EV at 11kw off a 3x16A CEE 3-phase receptacle. I'm not sure how this cable functions, costing only 400 EU:

https://eauto.si/metron-shop/product/type2cee-3x16a-3-phase/
 
We have finished new version of Accelev - v2.

image1-ea74b779.png
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Accelev v2 EVSE is a processor-controlled, advanced AC wall box with features not available in other chargers. Beside of grid monitoring (power shedding) and BatteryCare™ unique charging modes it gives an opportunity to equally load 2 phases at 3-phase 400V source to give more power to the car with single phase on-board charger, and thus – to charge much faster.

It is updatable and expandable via USB port and can be flexibly completed according to customer wishes (both cables are detachable/replaceable).

Standard features
Grid monitoring (immediate load reduction while grid overload detected – no more fuse switches keeping turning off)
BatteryCare™ - unique full charging / no full charging modes with maximum life protection for your battery
Updateable via micro USB extension port
Portable (some restrictions apply, see “Precautions & Installation”)
Detachable cables (both – input and output side). Use one charger in all situations.
2.8 inch TFT human interface with „geek mode” - you can monitor all parameters while loading
Overload and over-temperature protection and advanced safety solutions implemented

Manual is here: https://evtun.com/chargers.html?file=files/download/Accelev 6kW_8kW_dual_phase_manual_04_2019.pdf

image5-4ba9b312.png
 
Also, our Swedish distributor made this film. For those, who understand that magic language (Swedish) - it may be helpful.

https://youtu.be/kq28Dg4svhg
 
Using google and 2 phase EV charging I've found out about your product.
I live in Romania and I have a 3 phase home installation and a 25A main fuse.

https://imgur.com/MMpwi2P

I see two problems:

1. The price is huge...
2. I want to keep it outside.

WIFi would be nice.

P.S. Your site has no contact option/page.
This does not inspire confidence.
 
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