Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [battery-charging]

Please specify the battery type in your question. Include chemistry (e.g. lead-acid, Li-ion), voltage, capacity (in A·h or W·h), number of cells and how they are connected (series or parallel) .

References:

Lithium chemistries charging:

3102 questions
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How long does it take to recharge a car battery after starting?

Assuming a typical lead-acid, 12 V car battery (typically at 13 V or so fully charged), and that it takes roughly 500 A over 3 seconds to start an engine, how long will it take to recharge the battery at any given charge rate? Here's my attempt from…
Nick
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Why battery chargers take a pair of batteries and not one?

I have a number of AA- and AAA-sized NiMH rechargeable batteries ('accumulators'). All the chargers I encountered allow to charge 2 (4, 6, 8,..) such batteries at a time, but never a single battery. Is there a good engineering reason for this?
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Voltage input for charging NiMH Batteries

I have 12 AAA NiMH batteries(1000mAH and 1.2V per battery) and I want to know what is the optimum voltage for charging them. I am using a simple Constant Current charger(LM317 and 68 Ohm Resistor(R in the circuit diagram). But i'm unsure on what the…
Dean
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Lithium Ion Battery Charging Practices

I'm curious as to what recommendations can be made concerning charging routines for a typical lithium ion battery found in a device like a cell phone. The primary goal I have is to maintain the usable life of the battery for as long as possible. In…
helloworld922
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Easiest way to find matching li-ion cells (3.7V, 18650)

I recently acquired 50 used li-ion cells (18650). I'd like to efficiently determine which cells are good matches (i.e. which cells have similar: capacity, charge times, & discharge times) so that I can put them into battery packs that will perform…
zeffur
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How related are NiCd and NiMH chargers?

I have a device with integrated NiCd charger. Would it be feasible to modify it to work with NiMH batteries? If necessary, I'm ready to rebuild the whole circuit. Also what are main differences between NiMH and NiCd battery charging cycles?
AndrejaKo
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Is it possible to detect battery chemistry?

I'm looking at making a universal battery charger. And I am interested in seeing whether I can get it to detect the chemistry so if a non rechargeable had been put in it won't charge.
Dean
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How does the DW01A prevent overcharging and discharging?

I am not that familiar with electronics, it's just a hobby. I am reviewing the TP4056 and DW01A ICs that are used for battery charging. Actually there is nothing special about these ICs but I was wondering how the red marked area works. I know the…
J. Knabenschuh
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Charge a single AA battery in a double charger?

Most cheap AA battery chargers charge two batteries at a time. Many devices use 1 or 3 AA batteries, meaning it's difficult to make sure you've always got two compatible batteries in the charger. My fairly limited understanding of chargers is that…
naught101
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Lead Acid Battery Charger Design Factors

In any lead acid battery charger how does the per ampere rate of the battery being charged factor into the design. I think. You have to worry about the current voltage, and the current current being drawn by a depleted battery at charge time ? Say I…
kingchris
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How to prevent over-charging a battery?

I'm trying to figure out how to prevent over-charging a single AA battery off of a 1.5V / 200mA solar cell. I guess this comes down to asking how to determine whether or not a battery is fully charged. Also, which type of battery would be better for…
None
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Switched or linear charger IC for lead-acid battery - which one to pick?

What is the difference/practical consequence of using switched vs. linear charger controlling ICs and which one should I choose? I understand that the switched regulators/chargers use a PWM while the linear ones use an adjustable voltage…
eltomek
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Charging batteries connected in series as isolated groups

I put an electric motor into my 30' sailboat to propel it. I'm also using 8x12V Deep Cycle Marine Batteries to create 48V system (4 in series twice, connected in parallel) I have a 24V Wind Generator, 24V Solar Pannel and 24V Hybrid (wind and…
Alexei Afonin
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Coulomb Counting vs Joule Counting?

Is there any benefit to measuring joules in a smart battery in addition to/instead of coulombs? I'm currently integrating: microjoules <= milliamps * volts * milliseconds But the standard seems to be more: microcoulombs <= milliamps *…
tarabyte
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Do I have to keep an AGM battery on float charge 24x7?

I have a 50 Ah AGM battery that I use rarely (lighting during power failures, off grid camping, etc) - I use it a few times/year. To prolong the life of the battery, do I need to keep it on a float charger all the time, or is it sufficient to use…
Johnny
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