Low Voltage Lithium-ion Negative Terminal Location?

[illiniknick]

Hello, does anyone know where the negative terminal is for the new lithium-ion low voltage battery?

 

[KenC]

I'd trace the black wire, since that has to be connected to the negative post.

 

[ATPMSD]

Do you plan to connect something to it? Is so, don’t. You should not connect anything directly to the battery.

 

[RayK]

I think it might be simpler than that. I believe that every car in the last several decades has a negative ground chassis.

 

[medphys3]

Looks like it doesn’t have terminals- just the plastic connector. Regardless, I wouldn’t connect anything to that battery. Lead acid, sure, but not the Lithium ones.

 

[illiniknick]

Hmm, ok. My ICE car is dead and I was thinking of just connecting to it briefly and disconnecting the cables before starting the ICE car. I know Tesla doesn’t recommend it. Maybe I’ll just get a mobile jump starter.

 

[RayK]

Generally when jumping a battery, you should connect the negative terminal of the jumper cable to the engine block (chassis ground) and never the battery. The main reason is that any spark that occurs will be well away from the battery (where there can be hydrogen gas).

Edit: Note that this technique is for ICE vehicles. That Tesla does not recommend using an EV as a source for jump starting another car, I wouldn't do it.

 

[ATPMSD]

My ICE car is dead and I was thinking of just connecting to it briefly

The battery in the Tesla is NOT your typical car battery, it is of low capacity, maybe 30AH or so. If you try to use it to jump start another car it most likely will not work and you could damage the battery.

 

[Avid]

A jump pack is in your future.

 

[CaptainKrunch]

Yeah, don't even think about doing what you plan on doing. Go buy yourself a jumper pack and keep it in your ice car. Which you should have had in the first place in my not so humble opinion

 

[CaptainKrunch]

The battery in the Tesla is NOT your typical car battery, it is of low capacity, maybe 30AH or so. If you try to use it to jump start another car it most likely will not work and you could damage the battery.

It's worse than that...try less than 7 amp hours on the newer lithium and about 15.3 volts nominal voltage

 

[rlopin]

Hello, does anyone know where the negative terminal is for the new lithium-ion low voltage battery? View attachment 805829

I have an LED Frunk light kit that requires it to be connected to positive 12v and ground. It assumes my Model Y has the old lead acid battery and terminals. I can't figure out how to connect the terminals with the battery shown in this post. The positive is there but I can't see where I can connect the negative (ground). Any suggestions?

 

[AlanSubie4Life]

I have an LED Frunk light kit that requires it to be connected to positive 12v and ground. It assumes my Model Y has the old lead acid battery and terminals. I can't figure out how to connect the terminals with the battery shown in this post. The positive is there but I can't see where I can connect the negative (ground). Any suggestions?

Just look at the Owner’s Manual Instructions For Transporters.

I don’t know whether it is appropriate for a permanent connection, but for jumping the manual recommends:

Again for a permanent connection you’d probably try something different - hard to know. Maybe a nut on the bolt (I don’t have this car so hard to know what this looks like and what is possible). Take a picture and post it…did an image search and didn’t see anything obviously capturing this bolt.