Add together 2 battery packs with different amps?

[Signguy-Everett]

I have a 48V 15 amp battery pack. Can I add another to my bike with less or more amps to extend my range? I'll have to reread about parallel and series, but put together to get a 48v 25 amp (if I got a 48V 10 a) battery? Or do I need to get both of the same batteries? Or am I just totally screwed up on my thinking?
I'm ok if it's D - all of the above.

Still not thinking correctly after that igit hit me this morning. :?

 

[e-beach]

First things first.

What type of batteries are you referring to?
We need to know some details to give you a reasonably precise answer.

What is the chemistry you are running?

 

[Nobuo]

If both are paralleled it doesn't mind what capacity differences are. Both will be used maintaining the same voltage. It is better if both are the same kind of cells

 

[Signguy-Everett]

I have the 48V 15AH Lithium Ion PVC Battery. I would get another Lithium battery maybe a smaller unit though.

 

[Nobuo]

I have the 48V 15AH Lithium Ion PVC Battery. I would get another Lithium battery maybe a smaller unit though.

it is OK. how do you want to connect together at the controller?

 

[e-beach]

If you use the same types of batteries then you will be ok.

Simply parallel them.

So, both should be the same type of battery, same voltage, a different amp hour is ok.

If they are of different chemistry the the c ratings could be different and cause problems.

As for connecting them to the controller, a Y connector at the controller would work.

Simply plug or unplug the pack or packs you want to use.

 

[d8veh]

It will work OK as long as you take care of the following:

Where you bring them into parallel, they both need to be at the same voltage otherwise the higher voltage one will discharge into the lower voltage one at a rate that can damage it.

You must disconnect them out of parallel to charge them otherwise one will charge the other through the discharge leads, which can bring problems in some circumstances.

If you have a choice, use two batteries with the same chemistry.

 

[Nobuo]

If you use the same types of batteries then you will be ok.

Simply parallel them.

So, both should be the same type of battery, same voltage, a different amp hour is ok.

If they are of different chemistry the the c ratings could be different and cause problems.

As for connecting them to the controller, a Y connector at the controller would work.

Simply plug or unplug the pack or packs you want to use.

It will work OK as long as you take care of the following:

Where you bring them into parallel, they both need to be at the same voltage otherwise the higher voltage one will discharge into the lower voltage one at a rate that can damage it.

You must disconnect them out of parallel to charge them otherwise one will charge the other through the discharge leads, which can bring problems in some circumstances.

If you have a choice, use two batteries with the same chemistry.

I think that's Nailed, all the things to consider are there