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Results for ion battery charger
57
votes
relevance to design of battery charging systems. Summary: The voltage is slightly more than a multiple of the fully charged voltage of a Lithium Ion battery—the type used in almost every modern … . Almost all modern laptops use Lithium Ion (LiIon) batteries. Each battery consists of at least a number of LiIon cells in a series 'string' and may consist of a number of parallel combinations of …
answered May 10 '12 by Russell McMahon
38
votes
battery chemistries familiar to consumers, batteries based on Li-ion chemistry are inherently much more volatile. Due to such, they require very carefully designed battery management circuitry to … question from TI's battery gas gauge support forum. I am wondering if these Chemical Fuses are a mandatory element of Lithium-ion battery packs. I am working with a Chinese Li-ion pack supplier, and …
answered Apr 27 '16 by Bill Dubuque
31
votes
compatibility with all USB devices. It is for practical purposes impossible to make a truly universal charger using any combination of unchanging shorts or resistors on the USB charger or target device data … charging performance, it is not obvious how this can be the case for Lithium Ion / Lithium Polymer batteries and a more than adequate degree of charging control can be and is achieved by many other …
answered Jul 28 '14 by Russell McMahon
27
votes
Assessing full charge is the easy part. Method (a) A fully charged Lithium Ion single cell battery will have an open circuit voltage of about 4.2 Volt*. (4.1 to 4.2 OK. 4.0 not quite there. 4.3 - a … charger (eg one supplied by camera manufacturer or one of known quality) which has a "charging light. Place "charged battery on charger". Depending on how long since it was last charged the charge light …
answered Aug 25 '11 by Russell McMahon
25
votes
3answers
If I leave my cell phone with the charger plugged in all the time, would this weaken the batter, and why? I've heard that you should only charge the cell phone when you receive a 'battery low' message and leave it off the charger at other times? The cell phone has got a Li-Ion battery. …
asked Dec 17 '10 by Click Upvote
23
votes
If I understand you correctly, you want a charger than can switch between battery and input source (i.e. when adapter is plugged/unplugged) to power the load. There are plenty of charge control … ICs and circuits around that can do this. The MCP73831 is a nice cheap little Li-Ion charge IC, and with the addition of a PMOS/Schottky, can switch between adapter and battery. Here is an example …
answered Jul 31 '12 by Oli Glaser
21
votes
many problems. Lithium Ion batteries when being charged do not usually liberate hydrogen or release electrolyte. Both are possible, but only if a damaged or incorrect charger is used. In exchange for … In domestic use LiIon (Lithium Ion) batteries are, all things considered, MORE dangerous than "lead acid" batteries, not less dangerous. But both are "reasonably safe" [tm] when used properly. The …
answered Feb 13 '12 by Russell McMahon
16
votes
6answers
1] Voltage: 3.6V or 3.7V Are all 18650 lithium ion battery cells 3.6 or 3.7 voltsor or are there different voltage Lithium Ion cells in the market as well? 2] Possible Voltage Shortage? Do all 3.6 … , soldering together from the instant the are new, that way giving me lots of mAhs. Can I use the same Li Ion charger that was made for charging just 1 cell, and let it be in the charger for longer time …
asked Jan 22 '11 by Sam
16
votes
2answers
So far I've seen many Li-Ion battery chargers that do the full charge in about 1,5 hours or more. There're also NiMH battery chargers that claim they charge a NiMH battery in 15 minutes and then the … manufacturer follows to say that it reduces the battery lifetime compared to recommended 6-hours charging. What's the limit to how fast a Li-Ion battery can be charged? Will the fastest charge affect its lifetime? …
asked Nov 28 '11 by sharptooth
16
votes
3answers
This is related to another question I've just posted (What's the purpose of a ferrite bead inductor on this circuit?), regarding the battery charger described in the AVR450 Application Note - BatteryCharger for SLA, NiCd, NiMH and Li-Ion Batteries, which one day I hope to build. On page 40, there's a schematic showing the MCU connections (picture below). Marked in red is a 0Ω resistor that is …
asked Oct 15 '14 by Ricardo
15
votes
to see if it needs charging again. So all the charger has to do is make the power available. Below is a flowchart from the datasheet of MCP73831 Li-Ion charge controller IC from Microchip: You … Most modern phones have a charging control circuit which takes care of what you are proposing. When the battery is charged, the charge control IC will terminate charging of the battery, then monitor …
answered Jul 21 '12 by Oli Glaser
15
votes
would be perfect. ... Can someone please tell me how to do this? Also, can I use a LiPo charger for Li-Ion or do I need to make my own charger? LiPo and LiIon have similar charging needs. LiPo … usually allows larger charge rates but is essentially the same chemistry. A charger must "respect" the maximum battery voltage and maximum charge current - these are usually selectable. The per cell …
answered Jun 29 '12 by Russell McMahon
14
votes
particular series of battery and laptop involved. In general most laptops will use lithium ion cells similar to the 18650 type in the battery pack. The pack should be labelled or documented with its … and charge circuits within the limits set by the pack integrated protection IC you may be able to use the battery with a "dumb" load and charger so long as no protection limit is violated. If you …
answered Feb 23 '13 by whatever102904
14
votes
, manufacturers of Li‑ion cells are very strict on the correct setting because Li-ion cannot accept overcharge. The so-called miracle charger that promises to prolong battery life and methods that pump … University - Charging Lithium Ion Batteries Text from there - note comments on "miracle chargers". The Li‑ion charger is a voltage-limiting device that is similar to the lead acid system. The …
answered Nov 28 '11 by Russell McMahon
13
votes
The charge (termination) voltage level of Li-ion batteries is specified by manufacturer. The specification is based on reasonably accepted number of cycles ("battery service life") a battery can … voltage leads to slight increase in battery capacity, but it shortens the battery life. The manufacturer's recommended voltage is a trade-off between these two parameters. Contrary to urban myths …
answered Jul 17 '17 by Ale..chenski

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