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Akkus: Different voltage no issue?

X60/X61 series specific matters only.
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qeldroma
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Joined: Thu Feb 07, 2013 4:10 pm
Location: hamburg, germany

Akkus: Different voltage no issue?

#1 Post by qeldroma » Tue Feb 12, 2013 4:05 am

Hi together,

what i don't understand is, how it works, that an akku can have different voltage?
You can find
* 8cells with 14,8V
* 6cells with 10,8V
* 4cells with 14,4V

For my understanding, the akku should have the systems voltage as everything else would imply to regulate the voltage additionally with a loss of efficiency?

And second, what i also don't understand is, why this is not linear?
Why has a 4cell more voltage than a 6cell?

Thanks
Florian

twistero
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Re: Akkus: Different voltage no issue?

#2 Post by twistero » Tue Feb 12, 2013 10:22 am

Different batteries do not have to have the same voltage, because the raw voltage goes through a regulator anyways.

A 4-cell battery is 4 Li-Ion cells in series. A 8-cell is 2 strings of 4 cells in series. That's 3.6 * 4 = 14.4 volts. A 6-cell is 2 strings of 3 cells in series, which is 3.6 * 3 = 10.8 volts.
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qeldroma
Posts: 5
Joined: Thu Feb 07, 2013 4:10 pm
Location: hamburg, germany

Re: Akkus: Different voltage no issue?

#3 Post by qeldroma » Tue Feb 12, 2013 11:06 am

Thanks, good to know, so i don't need to worry about voltage any more ;)

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