Lithium Ion Battery Charger

469

07:43:13

The switch plugs in 2 batteries that have been discharged down to 3 Volts. Change the values of the batteries to 3.5 and see the flow stop. The operational amplifier is supposed to be a LM317 Mosfet voltage regulator.

published 8 years ago

WTFCircuit

8 years ago

If the intent is to burn the batteries, it's perfect

hurz

8 years ago

Check this for a single Lithium Ion cell and LM317 - can be adapted to 2 or maybe even more cells in.series (with balancer) http://everycircuit.com/circuit/4982496096681984

justinmh

8 years ago

Normally you charge batteries, esp lithium ions in parallel, not series.

hurz

8 years ago

Shit, how to get more then 3.7-4.2V from one lithium cell? How does Laptops work without series lithiums? We are looking forward for a ground breaking answere!

justinmh

8 years ago

Yes, lithium cells in series that form a battery. I was referring to most consumer batteries that are single cell, i.e. AAA, AA, or the 18650 lithium batteries, all these chargers charges them in parallel.

hurz

8 years ago

Yes and no. What you call "parallel" is not parallel in sense of connecting the cells in parallel. This wouldn't be a good idea. Suppose the cells do have a different rest of energy, which is most probably the case, and you connect them parallel! No, in standard 18650 lithium chargers for multicells, each cell is charged speparat which only looks like they are "parallel" but actually they are separated chargers in one!

hfosteriii

8 years ago

Cheap li ion chargers that hold two cells usually charge in parallel with max 3.7 to 4.2 volts. Series chargers have balance leads to push more (milli)amps to cells with less charge and vice versa. Laptops generally are charged two batteries paralleled, in three or four series/balanced.

tracine2828

3 years ago

Try DC to DC converter also known as a buck boost converter.

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