What do I do(CAN I PAY SOMEONE)

[steven7601]

I have recently bought this chargery bms. In the digram it calls for two relays that were not provided with the bms. I have looked every were trying to find a relay that can handle the 100vdc that my 24s pack will be putting out and since the relays are used to switch of and on the power I know I can just not use them but if anyone can help me figure out were I can buy a relay or maybe Theres some other way to use the signal voltage coming out of the bms to switch off and on the charge and discharge current. This is the picture of the bms digram with the two relays.Can I pay someone to maybe build me two high voltage relays I am working on finding out what is the switching voltage isbut I want them to be able to handle at least a 110volts and a 100amps please let me know if anyone can do this or knows how I can.

 

[wire.rat]

Hi I think you need large high current relays that can handle up to 200A such as this
http://www.mouser.com/ds/2/418/NG_CS_5-1773450-5_sec7_LEV200_0313_5-1773450-5_Sec-586597.pdf
http://www.ebay.com/itm/TE-CONNECTIVITY-KILOVAC-SOLENOID-RELAY-LEV200A5NAF-5-1618387-7-24VDC-500A-AMPS-/302142155149?hash=item465913698d:g:8wsAAOSwA3dYLy-U
You need to make sure that you get the relay with the correct coil voltage

 

[d8veh]

Why not use a bank of mosfets like a normal BMS. What voltage is the BMS switching output?

 

[steven7601]

From what I read on the site It is something between 15 and 60 volts.

 

[steven7601]

I cant find a high current relay the biggest one I can find says its 72volt solenoid rated at 100amps. Can I run a 100 volts threw this safely

 

[steven7601]

I found these thanks for the help

 

[atarijedi]

High power relays are called contactors, maybe using that term will make your search more fruitful.