Search found 94 matches

by romelec
Jan 05, 2018 12:42 pm
Forum: Large EV General Discussion
Topic: ATV conversion (mostly done)
Replies: 11
Views: 347

Re: ATV conversion (mostly done)

I wanted to add a heater, there is some insulation in the box (4mm cork) but I have found these tapes only in USA but the shipping to Europe is pretty expensive, about $50 :? How much power is needed ? Unfortunately it is impossible (or very expensive) to register converted vehicles in France, so I ...
by romelec
Jan 04, 2018 4:10 am
Forum: Large EV General Discussion
Topic: ATV conversion (mostly done)
Replies: 11
Views: 347

Re: ATV conversion (mostly done)

Thanks !

Yes I expected that for LiFePO4, but it's fine I won't use it a lot and almost never in winter because I will also be cold !

I have no idea for the range but 50km would be nice to have, I expect it to vary a lot depending on the terrain.
by romelec
Jan 03, 2018 11:48 am
Forum: Large EV General Discussion
Topic: ATV conversion (mostly done)
Replies: 11
Views: 347

Re: ATV conversion (mostly done)

The things to finish are mostly around the Sevcon programming: - figure out how to have regen on throttle release - add a brake lever for variable regen, I will use an hydraulic one with a pressure sensor - eventually setup the 3 different profiles with different power / regen levels - find how to l...
by romelec
Jan 03, 2018 11:42 am
Forum: Large EV General Discussion
Topic: ATV conversion (mostly done)
Replies: 11
Views: 347

ATV conversion (mostly done)

Hi, I started to work on my ATV conversion about 4 years ago (with a lot of long pauses), finally last week I could do the first test: lP8QWucr_ps The ATV is a Jianshe 250 bought about 10 years ago for 2000€ Motor: used ME1114 with regular hall sensor instead of the sin/cos, with a pulley and univer...
by romelec
Aug 28, 2017 2:24 am
Forum: E-Scooter and Motorcycle General Discussion
Topic: ixxat USB-to-CAN compact & Sevcon DLD flashing
Replies: 79
Views: 3977

Re: ixxat USB-to-CAN compact & Sevcon DLD flashing

If you don't already have a tool to sniff the CAN communications here is one I used. It is cheap, open source and works really well (tested on a car): http://www.fischl.de/usbtin I don't know much about CANOpen but here are some informations https://stackoverflow.com/questions/1232624/how-to-program...
by romelec
Jul 22, 2017 12:24 pm
Forum: Electric Aircraft
Topic: Sevcon Gen 4 Hardware decompile
Replies: 7
Views: 888

Re: Sevcon Gen 4 Hardware decompile

They are not perfectly waterproof, the Peugeot E-Vivacity scooters (they use size 2) have issues when used/parked under rain: http://www.vehiculeselectriques.fr/post222721.html#p222721 (in french) But they made a bad design choice, some water goes directly on the connectors. http://fs5.directupload....
by romelec
Jul 04, 2017 11:31 am
Forum: Motor Technology
Topic: Adventures in programming a Sevcon Gen4 Size4
Replies: 12
Views: 816

Re: Adventures in programming a Sevcon Gen4 Size4

Hi, I am highly interested because I also have to program almost the same motor (ME1115 with regular hall sensor instead of the stock sin/cos), I will start in about 2 weeks. I already made a few tests on a bench a long time ago, got the motor running with no load but the amperage was much higher (m...
by romelec
May 11, 2017 4:51 am
Forum: E-Bike Technical
Topic: Mobipus Controllers
Replies: 95
Views: 6413

Re: Mobipus Controllers

Thanks for your answers Shenta.

Is the PowerLock pin used to pre charge the capacitors before to close the contactor ?
The AUX output can't provide power to the contactor but what is its voltage level ?

What motor characteristics do we have to enter ?
by romelec
Mar 22, 2017 2:09 am
Forum: E-Bike Technical
Topic: Mobipus Controllers
Replies: 95
Views: 6413

Re: Mobipus Controllers

This is a small ATV, the gas engine was 11kW so I think It will be fine with the same electrical power
by romelec
Mar 21, 2017 8:56 pm
Forum: E-Bike Technical
Topic: Mobipus Controllers
Replies: 95
Views: 6413

Re: Mobipus Controllers

Thanks. 3 times the ratings but 3 times the price :wink: There is a 72300 in their website, I am not sure if it really exists but it may be good enough for my usage and also for you jansevr. For almost the same cost of the 72200 (but with less functionality) there is the APT AE96600 that is capable ...
by romelec
Mar 21, 2017 6:10 pm
Forum: E-Bike Technical
Topic: Mobipus Controllers
Replies: 95
Views: 6413

Re: Mobipus Controllers

What is the continuous and peak power capability of the 72200, and what is the phase current limit ? If 200A is the battery current it means 72V*200A = 14kW, but for how long with a good cooling ? EDIT: from http://www.mobipus.com/mc-p4.html it seems that it is 100A continuous and 200A peak Is it po...
by romelec
Jul 01, 2014 5:01 am
Forum: Items for Sale - New
Topic: Sevcon GEN4 72-80v 350A : 400$
Replies: 58
Views: 8671

Re: Sevcon GEN4 72-80v 350A : 400$

Because the DVT software from Sevcon is implemented to use a specific model that provides software APIs.

It is of course possible to communicate with any CAN interface, but then you will have to program the hundreds of registers by hand... good luck !
by romelec
Jan 18, 2014 5:38 pm
Forum: Items for Sale - New
Topic: Sevcon GEN4 72-80v 350A : 400$
Replies: 58
Views: 8671

Re: Sevcon GEN4 72-80v 350A : 400$

I have also bought him a controller but have a motor with sin/cos sensor, I think it is the same as in the Zero: ME1114.

I am in contact with motenergy and I am pretty sure he will find a solution to put an UVW sensor... well hopefully !
by romelec
Jan 13, 2014 8:08 am
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

What do you mean by half HD resolution ? What is the minimum android version ?

I could test it but only in a bench for now (until april I think), so I don't know if it can be usefull for you.
by romelec
Dec 19, 2013 5:44 am
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

I have a small question about the cell wires connexion. There is 2 connectors and they should be connected/disconnected in a specific order, which I understand. I will put a connector between the battery pack and BMS (that will be in an enclosure), is it safe to have only one, with all the wires (di...
by romelec
Dec 19, 2013 3:53 am
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

dutchlincoln wrote:What surprises me, is that the current of the headlight (35watts) is too little to display a current. (is this due the 10mv noise setting?)
Same issue but with about 80w load...
With colder temperatures the sensor offset has changed, it was 0A this summer and now 2A. The real one is about 1A
by romelec
Dec 16, 2013 6:01 am
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

dutchlincoln wrote:Can anyone tell me if it is also possible to put the current hall in the positive battery lead, instead of the negative?
Yes, I have also put it in the positive wire.
(I don't see the image due to my company's firewall)
by romelec
Dec 12, 2013 5:03 am
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

There is an Allegro sensor on the PCB for the charge measurment and an unknown brand that goes around the battery cable.
This one can be replaced by any model that have a 5v supply and and 2.5v output at 0A. LEM makes very good sensors up to 20000A, for example this one for your need.
by romelec
Dec 11, 2013 4:49 pm
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

Check or reinstall the USB driver, some USB to serial converters/chips are a pain in the a.. to use, especially the PL2303 which have cloned versions. Maybe you have previously installed a driver for another converter but that doesn't work for this one. I had such issues before, now I always use the...
by romelec
Nov 23, 2013 10:42 am
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

I found this in the manual: - auxiliary control: UV and OV control signal (opto coupled open collector) - BMS has two current sensor. One is the internal CS(current sensor) to monitor charging current. The other is the external CS to monitor discharging current.Besides that,external CS can also moni...
by romelec
Nov 22, 2013 5:19 pm
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

It is also my case :wink:
I won't use the accelerator but will supply it with 5v and connect to an enable input of the controller (Sevcon), I think the seat switch will be OK but the 50% PWM on low bat will have to be disabled somehow.
by romelec
Nov 22, 2013 3:38 pm
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

Hi,
Other question: How is managed the high voltage cut due to regenerative braking ?
After a full charge and going down a slope will lead to this situation and I absolutely need to manage this case for my future ATV conversion.
Cutting the accelerator signal will be OK for my case.
by romelec
Nov 04, 2013 11:13 am
Forum: Items Wanted
Topic: IXXAT USB-CAN converter for sevcon
Replies: 7
Views: 1718

Re: IXXAT USB-CAN converter for sevcon

I got an answer from IXXAT France last week, they can sell it for 300€ delivered so about the same than in the US+shipping.
I should have it next week.
by romelec
Oct 22, 2013 11:02 am
Forum: Battery Technology
Topic: foundingpower programmable bms
Replies: 537
Views: 55944

Re: foundingpower programmable bms

It uses the Linear Tech LTC680x parts, the same as used in the Mitsubishi i-Miev !

SmartBMS is OK for small ebikes, this one is for big ones and motorcycles/scooters/ATV,...