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[BFSMP]

Could someone please tell me how does one wire 3 batteries together to keep the same voltage but increase the service life/running times . Is it positive to negative etc or positive to positive.


I was absolutely useless at school in science and even this simple task is beyond my recollection.


Thank you.


Jim.

[T33cno]

All negatives together and all positives together.
To improve balance take the negative off one end and positive off other end rather than both off same battery.


Example

[BFSMP]

thanks Andy.............I'd have been running 36 volts through what I was trying to do had I not asked lol.


Jim.

[Netleyned]

The batteries are connected in parallel,
the connecting wires negate any 'balance'
What difference does it make connecting
as you have described.?


Ned

[T33cno]

It ensures both batteries drain equally rather than the one directly connected taking a bigger hit.
You can google if you prefer 

[T33cno]

I have two sets of four on my van

[Netleyned]

We never had that problem on Submarines


Ned

[T33cno]

Your choice entirely either will work

 http://www.batteriesnorthwest.com/batteryschool.cfm?TID=6

[jaymac]

What are the existing connectors on your Batts and  and system  there are ready made  connectors  for  tamiya and Deans   for either Parallel or Series se

ries which   saves you working it out
                ''We never had that problem on Submarines ''
I Like It

[BFSMP]

What are the existing connectors on your Batts and  and system  there are ready made  connectors  for  tamiya and Deans   for either Parallel or Seriesr se

a friend's daughter has a project for her A level where she has to design a hypothetical  table centre display, for a dinner dance and has decided to light a globe from the inside with a 12v bulb from a car/m/cycle and wanted some good length of time from a battery so I suggested linking 3 batteries together in a box under the table with wires running under the table cloth. I would imagine model boat batteries and spade connecters as the ideal.......nothing actually to do with model boats I'm afraid.


Jim.

[T33cno]

Interesting non the less 

[SteamboatPhil]

If she uses LED's you will not need that much power and they will run for approx 16 hrs   

[justboatonic]

Could someone please tell me how does one wire 3 batteries together to keep the same voltage but increase the service life/running times . Is it positive to negative etc or positive to positive.


I was absolutely useless at school in science and even this simple task is beyond my recollection.


Thank you.


Jim.

http://www.zbattery.com/Connecting-Batteries-in-Series-or-Parallel

[RAAArtyGunner]

Your choice entirely either will work

 http://www.batteriesnorthwest.com/batteryschool.cfm?TID=6

That's an interesting site with a different slant.
Thanks for the link 

[derekwarner]

So Ned says...... 'We never had that problem on Submarines'  

 ...checking the batteries on Oberon Class submarines was a job only for highly skilled ETS technicians 

The individual batteries were only 2 Volt Gates cells.........[sounds harmless?..... ] but with a few thousand of them wired in unexplainable ways produced about 2.4 billion amps...that would fry you quicker than about 1/1000 of a nano second in a Kornal Saunders deep fry 

Derek

https://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiQuv2m-vDTAhVLgbwKHeGbABAQtwIIJTAA&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DdhYThGiFGUo&usg=AFQjCNGKMUjjaPmJePvXngFys-z0XFrShw

[dreadnought72]

From a purely electrical point of view, this idea of 'balance' has to be wrong. Both neg terminals are at the same voltage - it shouldn't matter where you lead off the negative rail. But I suppose any terminal corrosion (= resistance) or skinny real-world wires (= resistance) for high amp loads will make a minor difference.


Andy

[aeronut]

It ensures both batteries drain equally rather than the one directly connected taking a bigger hit.
You can google if you prefer 

Don't believe all you read on the internet!

[T33cno]

Aye and nah Sayers especially 

[T33cno]

Most people think DC current flows from +ve to -ve

[T33cno]

https://www.allaboutcircuits.com/textbook/direct-current/chpt-1/conventional-versus-electron-flow/

[RAAArtyGunner]

Most people think DC current flows from +ve to -ve

Yes that has been mentioned on here.

It appears rather than upset the apple cart the status quo is maintained, positive to negative, except in those situations that are critical and not so??????????????????

But can I trust Professor Google?????

[derekwarner]

Ancient Romans first discovered that the left hand is negative and the right hand is positive

This is when they firstly put their tounge on the + terminal of their nicle reed encased hydrangeous battery....and the tip of the index finger of the left hand to the - terminal that they were able to decuce an electrical potential

The same test using the index finger from the right hand produced no such tingling sensation   

This amazing discovery has also been transposed into that famous saying ...."that the left hand always knows more that the other one"

[T33cno]

Love it 

[malcolmfrary]

From a purely electrical point of view, this idea of 'balance' has to be wrong. Both neg terminals are at the same voltage - it shouldn't matter where you lead off the negative rail. But I suppose any terminal corrosion (= resistance) or skinny real-world wires (= resistance) for high amp loads will make a minor difference.


Andy

They are only at the same potential in theory if the connecting wires are heavy enough.  If the connecting runs have any length to them, the batteries should be connected as in the diagram to ensure that all of the batteries are both charged and loaded evenly.  The difference is marginal, but it is there.  Practically, with the distances involved in a model, provided the wire is heavy enough for the loads involved, nobody will notice.

[malcolmfrary]

Ancient Romans first discovered that the left hand is negative and the right hand is positive

This is when they firstly put their tounge on the + terminal of their nicle reed encased hydrangeous battery....and the tip of the index finger of the left hand to the - terminal that they were able to decuce an electrical potential

The same test using the index finger from the right hand produced no such tingling sensation   

This amazing discovery has also been transposed into that famous saying ...."that the left hand always knows more that the other one"

So I googled  nicle reed encased hydrangeous   and found https://uk.pinterest.com/pin/563301865877001726/