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Anonymous
Question about powerbanks 2017-06-11 03:35:30 Post No. 60855871
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Question about powerbanks 2017-06-11 03:35:30 Post No. 60855871
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Not sure if /g/ or /diy/ can answer but
I've seen the internals of a powerbank and there are only two (maybe 3 on the good ones, third is used for balancing between the cells) wires coming from the bank of cells to the circuit board, this delivers the positive and negative for the current to flow. My question is: how the fuck is it even possible to charge and use the powerbank at the same time?
If the cells only have two wires (positive and negative) and when something is connected to the powerbank they deliver current to the circuit, when you charge the powerbank and also discharge it at the same time wouldn't that create a short circuit? How can current flow both in and out the cell at the same time, with reversed polarity?
I'm sure the question is the dumb and the answer is even dumber, but I'm dumb so enlighten me.
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what makes you think charging occures with reverse polarity?
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>>60856008
My extremely rusty knowledge of electronics.
So when the powerbank is charging (from the input) and delivering power (via the outputs) at the same time the charging happens in series with the discharging?
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your charger has something like 500-1000 mAmps power
it works this way- part of the incoming current is divided between the output and the battery, in such a way that your phone draws something like 600 mA and your battery 400mA out of the 1000mA
the current doesn't go through the battery, just the part that isn't consumed by the output
the same way you can use your phone while charging: part of the incoming current actually powers the whole phone while the rest goes to the battery
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>>60856077
parallel
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