paralel and series

[mygrumpy001]

Hi Need a diagram to wire 2 liPo batterys together in series and parallel John

 

[Alan Quay]

Parallel is pos to pos, neg to neg. Series is pos to neg, use the other two for load.

What exactly are you trying to achieve?

 

[Kinninvie]

If you need a wiring diagram for 2 batteries then I worry that you may not be capable of looking after LiPo batteries properly and safely.
All it takes is a wrong connection and you could end up with KFF (Kentucky Fried Fingers) or worse still an explosion and fire !!

 

[mygrumpy001]

Parallel is pos to pos, neg to neg. Series is pos to neg, use the other two for load.

What exactly are you trying to achieve?

Hi Have 2 18.5v and 5500mah and a 4000 want double v and mah John

 

[Alan Quay]

Sorry, you can't have both.

Series will double the voltage, parallel will double the capacity (Ah). Can't have it both ways.

Also, with them being different capacities you need to be very careful about how you connect them. I would advise against it with your present level of knowledge.

 

[Nealh]

Hi Have 2 18.5v and 5500mah and a 4000 want double v and mah John

If you had 4 bricks then you could wire them up as 2 packs in series and then in parallel to obtain required voltage and ah.

 

[Gringo]

If you had 4 bricks then you could wire them up as 2 packs in series and then in parallel to obtain required voltage and ah.

If we had some chips, we could have "fish & chips" if we had some fish

Wishfull thinking there, you've taken 2 battery packs and suggested a 4 battery solution

Anywho,back to the OP
Do you have any kind of BMS or low voltage protection ?
Lipo cells of different capacity in parallel will self balance so it's possible to double the amps. but conect the same two packs in series would be asking for trouble, the lower capacity pack will discharge first making the remaining capacity in the other pack useless. Also the smaller pack will have to work a lot harder and the extra stresses will shorten it's life exponentially

 

[Alan Quay]

As I said in the other thread, I don't think the OP presently has enough basic electrical knowledge to handle combining lipo's safely.

As for them balancing in parallel, it's important to ensure that they start off at the same SOC, or you could get trouble.