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Piro
Vendor
Posts: 33
Joined: Sun Feb 19, 2017 5:47 am
Delivery Date: 19 Feb 2017
Location: Kraków, Poland
Contact: Website Facebook YouTube

Dual-phase 2x faster home charger

Fri Jul 28, 2017 1:42 am

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
Last edited by Piro on Sat Jul 29, 2017 1:10 am, edited 2 times in total.
Alcohol won't solve your problems. On the other hand, milk won't solve them either...
Nissan Leaf tuning http://evtun.com

jjeff
Posts: 1364
Joined: Wed Jan 13, 2016 9:10 am
Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: 2x faster home charger for Leaf without 32A power lines.

Fri Jul 28, 2017 5:47 am

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 :)

User avatar
Piro
Vendor
Posts: 33
Joined: Sun Feb 19, 2017 5:47 am
Delivery Date: 19 Feb 2017
Location: Kraków, Poland
Contact: Website Facebook YouTube

Re: 2x faster home charger for Leaf without 32A power lines.

Fri Jul 28, 2017 7:24 am

jjeff wrote: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...
Alcohol won't solve your problems. On the other hand, milk won't solve them either...
Nissan Leaf tuning http://evtun.com

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