Questions tagged [lithium]
Lithium batteries are disposable/non-rechargeable batteries, often found in button/coin-cell form and sometimes in cylindrical cell form. Lithium batteries are used in portable consumer electronic devices, including watches, cameras, calculators, thermometers, etc.
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What is the role of the MOSFETs in this PCB protection circuit other than as a CFET/DFET?
I want to learn the role of the MOSFETs here in this teardown video. As mentioned in the video it is part of the protection PCB for a powerbank.
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Options after breaking USB-C jack off of PCB
Hello!
Snapped the USB-C jack off of my Logitech MX Keys.
I have a background in computer engineering and some experience doing board-level repairs. I do have an SMD hotplate, multiple soldering ...
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Preventing current between batteries
I charge 2 lithium Ion boat batteries from a single solar regulator. I have the positive leads from both batteries in common to the regulator and charging is fine. But if charge current is low I want ...
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Lithium polymer battery size versus energy density
I am building a small device that needs to use a rechargeable lithium polymer battery. The dimensions I am looking for are 351125 { 35 mm (H) x 11 mm (W) x 25 mm (L) }, which is the standard way these ...
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Lithium iron phosphate battery charging for single and multiple 12V 7Ah batteries
I want to charge my lithium battery as shown below, but I first want to explore going down the route of making my own PCB before I decide to buy an off-shelf device. I want to charge the battery at a ...
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Explanation of the schematic for the BQ25703A charger
I am trying to build my solar charger to charge my lithium batteries. The lithium batteries already have a BMS on them. I am using the BQ25703A IC from Texas Instruments.
Datasheets:
BQ25703A
BQ2570X ...
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How does this lithium battery charger 3S work?
I am trying to figure out how this lithium battery charger works.
How exactly do those discharge/bleeding resistors work? Are they only "activated" when no power is present so that each ...
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Li-SOCL2 battery undervoltage protection
Working on a long-service device powered by Li-SOCL2 primary battery. I've gathered safe cutoff voltage for this battery chemistry is 2V, so due to that and other reasons I'm aiming for 2.3V cutoff. ...
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What is the formula for maximum battery pulse vs pulse duration?
I am interested in finding the maximum current a lithium-ion battery can provide for pulses in the order of 50 ms.
If my battery can provide 50 A continuously and 120 A for 10 seconds, how can I find, ...
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How do DC/DC converters work as lithium battery chargers?
There's a lot of DIYs that utilize DC/DC converters to charge Lithium batteries. A quick Youtube search shows dozens of these DIYs. I was wondering how these home-made chargers work. Yes, DC/DC ...
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Is my 4s2p pack connections correct?
I'm planning to build my 4S2P battery pack using 18650 lithium-ion battery cells. I need to make sure my connections and my battery pack is correct and safe before I make the connections. Here's the ...
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How to clean water damaged Lifepo4 batteries
What is the best way to clean water damaged rusted lithium Lifepo4 batteries?
I have six used 16sXp 48v 5kwh server rack batteries that look to have been sitting in water and have rusted. There is ...
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Litium Battery Series-Parallel 2S2P Protection
I am designing a PCB which has 4x Primary Lithium cell Batteries (ER14505M) two in series and two in parallel to give 7.2 V 4400 mAh. The cells have their own holder so it would be possible to only ...
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I would like to use two BMS's on a single pack
I would like to use TWO BMS's on a single lithium pack. putting them in parallel. Q is - do i need to also run separate balance wires to each BMS , OR, just run the 2nd separate B- input to the 2nd ...
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Adjust lithium BMS over discharge voltage
I have a few 2-series lithium battery protection modules coming from different sources, but all of them are the same classic chinese ones based on Hycon's HY2120 chip.
These are all shuting down at ...
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