Kornman
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Joined: Thu Apr 18, 2013 1:27 pm
Delivery Date: 18 Apr 2013

Coil voltage

Wed Oct 30, 2019 11:31 am

Hi.
Does anyone know the coil voltage of the contactors in a Leaf -12 battery pack? Google is not my friend in this case (Panasonic AEV6505A seems unknown....).

alozzy
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Location: Vancouver, BC
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Re: Coil voltage

Wed Oct 30, 2019 11:44 am

Don't know if it will provide any useful information, but this blog post has an image of the relay, along with a lot of other good information:

https://www.summet.com/blog/2015/04/17/ ... e-modules/

I noticed that there is a QR code sticker on the relay - maybe scanning the QR code would take you to a spec sheet? Worth a shot...
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Kornman
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Joined: Thu Apr 18, 2013 1:27 pm
Delivery Date: 18 Apr 2013

Re: Coil voltage

Wed Oct 30, 2019 12:46 pm

Thanks. But this guy, like me, writes that he cant find any specs on the contactors..... I have read the QR-code but it only states the serial number, already printed on the contactor.
I have tried different voltages, and the contactor "snapps" at 9 volts, so i guess it meant for 12V but i am not sure. Over- and under-voltage may overheat the coil.

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Nubo
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Re: Coil voltage

Wed Oct 30, 2019 3:25 pm

I would imagine 12V. How else could the car boot itself?
I noticed you're still working with polymers.

nlspace
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Re: Coil voltage

Wed Oct 30, 2019 6:38 pm

Wolftronix posted that these are 250 to 300 Amp contactors with 12V coil voltage; need to have a flyback diode in your drive circuit; and recommends to PWM at 6V to hold it closed after pull-in.

Do you have a meter that you could measure the coil resistance? this would help calculate the power needed and the heating that would occur.

The contactors are polarized if you intend to use them in a diy project.
Image
Last edited by nlspace on Thu Oct 31, 2019 5:16 am, edited 1 time in total.

lorenfb
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Leaf Number: 416635
Location: SoCal

Re: Coil voltage

Wed Oct 30, 2019 10:14 pm

nlspace wrote:
Wed Oct 30, 2019 6:38 pm
need to have a flyback diode in your drive circuit;
Always the case when driving an inductive element, i.e. the relay coil, to protect the driver from the inductive overvoltage
at turn-off. A zener diode can also be used to clamp the inductive spike.

nlspace wrote:
Wed Oct 30, 2019 6:38 pm
and recommends to PWM at 6V to hold it closed after pull-in.
Would not recommend PWM @ 6V (~50% DC @ 12V) because of potential for continued contact bounce resulting in early relay failure.
nlspace wrote:
Wed Oct 30, 2019 6:38 pm
Do you have a meter that you could measure the coil resistance? this would help calculate the power needed and the heating that would occur.
The relay is rated for 12V, so the only issue would be the minimum coil holding current from the coil driver device, and avoiding
the coil driver's power dissipation.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

Kornman
Posts: 5
Joined: Thu Apr 18, 2013 1:27 pm
Delivery Date: 18 Apr 2013

Re: Coil voltage

Fri Nov 01, 2019 10:54 pm

Thank you all for very good answers!
Yes, i am using the contactor in a DIY project.
A 4WD, 4WS, fully electric mini loader. No hydraulics at all.
If anyone interested, scroll down to bottom of: https://www.maskinisten.net/viewtopic.p ... &start=120

Thanks again.

Taiponz
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Joined: Sat Jul 13, 2019 5:14 am
Delivery Date: 13 Jul 2019

Re: Coil voltage

Tue Jul 13, 2021 2:27 am

Hi. I was also looking the datasheet and found here and also this. They say 400V 200A with 12V coil.

http://www.electricvehiclewiki.com/wiki/bms/

good luck.

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