wiring lock switch to system

[staft]

Hi all. How does a keyed lock like this
http://www.bmsbattery.com/accessory/452-aluminium-alloy-case-05-lock-key.html
get wired into a system? BMSbattery says it is wired to the battery's bms, which didn't completely make sense to me. I assume this is in place of a cutoff switch, but where does it go for best results? (I can wire a wall outlet, but otherwise my understanding is pretty sketchy.) Keep in mind wires don't look very beefy.
Any better suggestions?

 

[dogman dan]

Best bet is if your controller has two red wires from the battery to the controller. One big thick one, supplies power. The little thin one powers a circuit that turns the controller on or off. If you have the two wires, you put the switch between the battery and the controller on the little wire.

If your controller has an on off switch, you could take the two wires to that switch off, and use the keyswitch instead.

The keyswitch cannot handle the current of the batteries main power wire to the controller, the thick one.

 

[dnmun]

that lock is made to replace a keyed locking pin on an aluminum cased battery shell. that is the only use.

 

[dogman dan]

I thought it looked like it did both. Likely the wires do something like a switch.

 

[dnmun]

the wires are to connect the battery to the plug on the end of the battery case. it is the pin that sticks out and locks the case onto the rack. you can see the mounting screw boss on the side. so this will replace the switch when it burns up over time if you have that kinda aluminum battery case.

 

[auraslip]

Could be something custom on the bms that deactivates it and therefore the battery. Otherwise it's the enable or ignition wire on the controller like dogman said. I use a keyswitch like that on my bike.

I'm actually thinking that it might be an interesting idea to deactivate at the bms since there will be no vampire drain on the pack. Would it still abuse the caps on the controller when you turn it on that way?

 

[dogman dan]

Perhaps he could just use something like this. There are various US sources for scooter parts. Just using this one as an example of the type.

http://www.ebay.com/itm/Ignition-Switch-Keys-Lock-for-Electric-Scooters-Bikes-/261009914760?pt=Other_Vehicle_Parts&hash=item3cc5673b88&vxp=mtr

 

[dnmun]

yep, that would be better as a switch because the one from BMS has that big pin that comes out of the side.

it is worthwhile having a source for that locking key switch since a lot of people use the aluminum cased lifepo4 batteries and the contacts burn up pretty fast. so that BMS battery switch with the locking pin is a cheap replacement.