Author Topic: Li-Ion Charging 4 Parallel Cells at Once  (Read 4557 times)

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Offline frank26080115Topic starter

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Li-Ion Charging 4 Parallel Cells at Once
« on: January 03, 2008, 06:46:10 PM »
Can I use a single MCP73831T-3ACI/OT li-ion charger chip to charge 4 parallel li-ion cells at once? Or should I charge them one at a time?
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Offline HDL_CinC_Dragon

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Re: Li-Ion Charging 4 Parallel Cells at Once
« Reply #1 on: January 03, 2008, 07:19:00 PM »
im pretty sure your supposed to charge them on separate circuits
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Offline frank26080115Topic starter

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Re: Li-Ion Charging 4 Parallel Cells at Once
« Reply #2 on: January 03, 2008, 07:20:18 PM »
But I'll be using them together in parallel too, wouldn't the charge in each cell be equal?
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Offline HDL_CinC_Dragon

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Re: Li-Ion Charging 4 Parallel Cells at Once
« Reply #3 on: January 03, 2008, 07:33:55 PM »
If your charge was designed specifically to be able to charge multiple batteries at once then there shouldnt be a problem but if im not mistaken, trying to charge multiple batteries in parallel or series on a circuit designed for only one can increase the risk of damaging the batteries. Im not extremely familiar with Li-ion batteries so im not sure how they would react to an over charge or something of that nature...
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Re: Li-Ion Charging 4 Parallel Cells at Once
« Reply #4 on: January 07, 2008, 12:34:15 PM »
Li-Ion batteries are sensitive to charge current, so putting cells in parallel changes the current. Most Li-Ion chargers actually detect the cells before charging.

The datasheet should specifically say how many cells it can charge and the cell configuration/voltage.

If you aren't sure, send us a datasheet link . . .
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