Battery Pack

[mygrumpy001]

Hi All Have 4 25c-2700 3s1p have wired them series and parallel but only get 25v should I get 44.4v 5400mah will put photo up of wiring Thanks for any help mygrumpy001

 

[KirstinS]

You've wired 2 x 11.1v packs in series to get 22.v (twice)

But instead of placing the 2 x 22.2v into series to get 44.4v you have paralleled them (so increased aH but not voltage)

 

[mygrumpy001]

You've wired 2 x 11.1v packs in series to get 22.v (twice)

But instead of placing the 2 x 22.2v into series to get 44.4v you have paralleled them (so increased aH but not voltage)

Hi KirstinS any chance you can do me a diagram how it should be wired mygrumpy001

 

[Alan Quay]

KirstinS, let me save you the trouble:

Here are the diagrams I posted last time you asked this question:

 

[D8ve]

KirstinS, let me save you the trouble:

Here are the diagrams I posted last time you asked this question:

If you are struggling with these diagrams then I am worried that the balancing and care needed for Lipo batteries will also be hard for you.
As the risk is burning your house down....
Please reconsider what you are doing.
You need to keep the cells balanced, with a balancing charger.
Monitor the discharge exactly. Be safe and don't deep discharge.
And only charge in a safe place.

 

[fishingpaul]

Ithink the diagram would be easier to follow, if it showed the positive and negative connections on the battery,there are loads of good how to connect batteries in series and parrallel articles on the web, with two batteries you can connect either in series to get double the voltage, or parallel to get double the amps,you will need four batteries to get 44v and 5400 amps.PLEASE READ THROUGH THEM VERY CAREFULLY OR YOU WILL LITERALLY GET YOUR FINGERS BURNT OR WORSE.

 

[D8ve]

Ithink the diagram would be easier to follow, if it showed the positive and negative connections on the battery,there are loads of good how to connect batteries in series and parrallel articles on the web, with two batteries you can connect either in series to get double the voltage, or parallel to get double the amps,you will need four batteries to get 44v and 5400 amps.PLEASE READ THROUGH THEM VERY CAREFULLY OR YOU WILL LITERALLY GET YOUR FINGERS BURNT OR WORSE.

He isnt going to get 5400 amps the likely is 5.4a *25c= 125+ amps more that the motor can take. Usually 20 amps is max and then the battery will be lucky to last 15 mins. And that is near 2kw.
Smoking .. It could all end up smoking !

 

[Alan Quay]

He isnt going to get 5400 amps the likely is 5.4a *25c= 125+ amps more that the motor can take. Usually 20 amps is max and then the battery will be lucky to last 15 mins. And that is near 2kw.
Smoking .. It could all end up smoking !

I think fishingpaul means 5400 mAh.


Sent from my HTC One_M8 using Tapatalk

 

[Alan Quay]

Ithink the diagram would be easier to follow, if it showed the positive and negative connections on the battery,there are loads of good how to connect batteries in series and parrallel articles on the web, with two batteries you can connect either in series to get double the voltage, or parallel to get double the amps,you will need four batteries to get 44v and 5400 amps.PLEASE READ THROUGH THEM VERY CAREFULLY OR YOU WILL LITERALLY GET YOUR FINGERS BURNT OR WORSE.

I didn't really intend it as a wiring diagram, more a schematic to to illustrate the differences (series/parallel) and to highlight the only 3 valid combinations of 4 batteries.

Sent from my HTC One_M8 using Tapatalk

 

[D8ve]

I think fishingpaul means 5400 mAh.


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I know but if he needs +,- is then it is stretching the safety issue

 

[anotherkiwi]

With 4 x 2700 mA 3C wired in series you will get 44.4 V and 2.7 Ah. 2 x 2700 mA in parallel and then 2 x in series you will get 22.2 V and 5.4 Ah...