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Questions tagged [lithium-ion]

Questions regarding Li-ion batteries (Lithium-ion), including proper charging and usage.

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What is better, always keep connected or discharge/charge cycles for the smartphone battery? [closed]

My smartphone is serving as internet hot-spot over WiFi for my home/office laptop. I’m keeping phone always plugged in charge. Most of the day I’m home and using a lot of traffic. What is the best ...
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0answers
56 views

Query on Li-ion battery charging/protection IC

I have drawn a LI-ION battery charging circuitry for LED lamp application. I used the IC’s DWO1A for 1 cell lithium ion battery protection and 8205 for dual N Channel enhancement MOSFET. Since ...
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2answers
210 views

Lithium battery charging-undervoltage

I know that the maximum charging voltage for lithium ion batteries is 4.2v. I also know that charging a lithium ion battery involves a constant current and constant voltage phase. But what will ...
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0answers
57 views

do you multiply the 120 V ac with same DC 2500 mAh ? [duplicate]

I have 2500 mAh on the battery and 3.7 V normal voltage and I get 55 watts for the pack in DC, then after changing my voltage to 120 AC, how can I calculate the wattage? I mean multiply the 120 V ac ...
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1answer
216 views

Creating a Li-on backup for a 12v router

I am building a small battery backup for my router with the 12V 0.5A DC input. Main use is to keep the router powered up during load shedding (aka. power cuts / blackouts ) while my backup generator ...
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0answers
46 views

(How) Can I charge 6 18650s from a single input but use them in series? [duplicate]

Edit: 've read the similar post but i don't fully understand it. See below I'm new to working with Li-Ions, but i want to build a Bluetooth-Speaker thats powered from (protected) 18650 cells. To ...
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1answer
402 views

DW01 2s protection

I want to protect 2 18650 batteries with single DW01. The problem is how to increase the protection voltage on DW01 . I have read that I should use voltage divider on VCC pin. I just want to make sure ...
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2answers
508 views

Connecting lithium and lead-acid in series

I have a 48v 12Ah lithium battery pack, and I want to connect one or two lead-acid batteries of 12v 12Ah to it to make it 60v or 72v 12Ah. I can charge it with a 60v or 72v lithium charger. Will this ...
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2answers
247 views

What is the maximum charging current of the MAX1737?

I am currently trying to choose a charger IC for Lithium-ion cells batteries and thereby came across the datasheet for the MAX1737: https://datasheets.maximintegrated.com/en/ds/MAX1737.pdf The ...
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1answer
198 views

18650 battery cells died in the winter weather, can they be restored?

I have 1.4kwh worth of hoverboard batteries for my E-bike that I stored in the garage over winter. They were fully charged when stored. I did not know this was bad for the batteries, I took it for a ...
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2answers
155 views

Can you overcharge a Li-Ion on CV charging when charging voltage > saturation voltage?

This question is almost answered in "Charging li-ion cell using constant-voltage only" but I wanted to know if this is true for an extra long period of charging. I bought a broken electric bike from ...
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1answer
784 views

Pinout of / how to charge that certain battery (Lithium-ion, 3.7 V, 2 Cells, parallel, 4400 mAh)

I would like to charge the following rechargeable Lithium-ion battery outside the device where it is normally placed in (and charged): https://buy.garmin.com/en-US/US/p/pn/010-12456-06 I don't know ...
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1answer
96 views

Drone Thermal Imaging solution: Power Supply Module - Design Review & Load Sharing Query

I'm designing a DIY Thermal Imaging solution for my DJI Mavic Pro drone. Whilst the full design has been included for background info, this post refers to the power supply module design. The pertinent ...
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1answer
63 views

Lithium Ion voltage during discharge

I'm trying to understand how lithium ion batteries work during discharge, looking at the following batteries https://www.nkon.nl/sk/k/hg2.pdf. My question is how do you determine the current voltage ...
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1answer
575 views

nodeMCU power via battery + battery charger + booster

I need to power a nodeMCU (as far as I know it can work with 3v3 but I use some I2C modules that need 5V so .. let's power everything with 5V) I have a Li-ion battery (3.7V) I have a TP5046 based ...
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1answer
55 views

Can a cell phone battery be used in a power bank at 2A?

Can/will a lithium ion cellphone battery that can be charged at 2 amps safely discharge at 2 amps if used as a power source for a power bank? (Samsung galaxy S4 mini battery in particular) Edit: I ...
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1answer
88 views

Can a Nintendo 3DS battery be used to power a pcb? [closed]

I just bought a power bank pcb for a diy project I'm planning. The PCB requires a lithium ion battery with 3.7 volts as input. The power bank then outputs 5v to 2 other PCBs. Can I use any Li-ion ...
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0answers
83 views

How to connect 2 thermistors for battery protection?

I'm planning to use BQ24100 for charging Li-ion cells connected in parallel. Unfortunately, the cells have to be separated by few centimeters, so I have to use 2 thermistors. So, how to connect 2 ...
2
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1answer
39 views

What causes ions inside of a lithium ion battery to move between the cathode and the anode?

I understand that inside of a lithium ion battery, the ions move from the anode to the cathode internally during discharge in order to attract the electrons to move from the anode, through the wires, ...
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0answers
45 views

How to safely and fast charge 2 Li-ion cells connected in parallel?

I want to charge 2 Li-ion cells. They are connected in parallel and they are from the same manufacturer (Samsung) and seller. I'd like the charging to be safe and reasonably fast - my cells are 3500 ...
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0answers
40 views

How does non-ideal charging affect the life of a Li-Ion/Li-Po battery?

For lithium ion batteries, the standard way of charging them is CC - CV - cutoff. My question is, what are the effects of not following this pattern? For example, what if you charge with just a ...
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0answers
132 views

MPPT charge control Project - LT3652

I am doing a Solar powered power bank as my dissertation project. It's based on LT3652 charge control, a Lithium-Ion battery (4500mAh) and 2 boost converters (3.3-5V and 3.3-12V). I am using a 21W, ...
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0answers
32 views

Can lipo and Lithium-ion batteries be used together?

Lithium ion batteries have high specific energy and lipo have high c rating (high power). Is it possible to put lipo and lithium-ion batteries in parallel if they are at the same voltage and ...
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1answer
63 views

Does any of those internet tips to recondition Li-ion batteries actually work?

If you google "fix liion battery" of similar, you'll get the following tips on various sites: Fully discharge and charge battery - this sounds like completely bad advice since discharging Li-ion ...
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4answers
129 views

How is it possible a dead old Lithium battery becomes charged after opened?

I opened a lithuim battery salvaged from my old laptop battery pack. I checked million times that it is 0V and it was by the time i was opening it. For some reason i would love to know, it is now ...
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1answer
77 views

DATA for Lithum ion battery

I am working on RUL for lithium ion battery and have downloaded few data sets for the same, but facing difficulties in understanding the data. the link is below, http://ti.arc.nasa.gov/c/5/ I am ...
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1answer
299 views

TP4056 and Lipo batteries

I have several 3.7V 1800mah and 700mah Lipo batteries that also have the 8205A MOSFET and DW01a chips mounted to the top. I've seen the two types of TP4056 boards (one with these two chips for lipo ...
2
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1answer
56 views

protect standby lithium ion battery from continuous charge [closed]

The Amazon Echo Dot is a neat device and pretty portable, except that it doesn't have a battery and it takes a minute or so to reboot if you unplug it from one place and plug it in another. I've ...
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0answers
423 views

Integrating Li-ion charging & protection on the same PCB, how to wire/ground properly?

I'm designing my first PCB in which I'd like to include a battery charging IC as well as a protection IC, with a focus on small footprint and low BOM. The trifecta that I came across quite often was ...
2
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0answers
66 views

Should I be conservative about setting the output voltage of the CV phase of Li-Ion charging

Background My application features a Li-Ion battery (NCR18650B) which I'm charging with the standard CC/CV method. Various constraints force me to use a generic buck converter (with current limiter) ...
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1answer
73 views

Power bank DIY Build( Regarding protection circuits)

I have been toying with the idea of making a power bank as I have a few old laptop batteries lying around which are still working well. I plan to use these components: Constant current lithium ...
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1answer
83 views

Can someone help me on how to charge this Battery? [closed]

I have a ES cordless drill and it has a Li-Ion battery (model is ES GB118L20). The original battery charger is missing and there is almost no way for me to get one in my country. The Battery has 5 ...
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1answer
390 views

Using a voltage supervisor IC to protect a Li-Ion battery from undervoltage >2.8V?

Sorry if this has already been asked, I tried searching but might not have the right vocabulary. I'm starting to use lithium-ion batteries to power projects, and I've wound up with some 18650 cells. ...
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1answer
180 views

Li-Ion charger IC leakage current confusion

I'm currently building a Li-Ion battery charging circuit which has a 5V/2A input. It should implement load-sharing in order to keep the output alive during charging. For charging, I found the ...
1
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1answer
284 views

Draw 10A from a 18650 Li-Ion battery safely

I understand that the title may sound ridiculous but for my project I need to connect two 18650 Li-Ion batteries in parallel (In parallel so I can easily and safely charge them using 2 charging ICs). ...
1
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2answers
256 views

Lithium Ion prolonged lifespan

According to the Battery University, charging a Li-ion cell to just 3.92v is the optimal voltage to avoid stress and lithium plating. Problem is, nearly all consumer chargers focus on going to 4.2v ...
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0answers
74 views

Increasing the number of parallel cells for batteries

I am using BQ20Z655-R1 for a lithium ion battery which is in the 4Serial-3Parallel cell configuration. In addition, I don't use LED or LCD in this lithium-ion battery. My cells have 3500mAh capacity. ...
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2answers
735 views

Lithium Ion Battery Pack - Looking to calculate watt-hours from V1 to V2

I've got a 2S4P Lithium Ion 18650 pack (that's 2 sets of 4 cells in parallel where each set is in series). These batteries can be changed to typically around 4.1 or 4.2v and can technically be ...
0
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1answer
56 views

Are there IC /sensor/module/microcontroller to measure voltage upto 60 volts or high current like 75 ampere

Are there any any IC s (like bidirectional current sensing ic s) or sensors that can measure high voltage like 60-70 volt and conver it to equivalent 0-5V . Also the current rating is high 70-85 ...
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0answers
152 views

Why would a 5s BMS lower to output voltage of my battery?

I have 10 lithium ion cells, linked first in parallel sets of two and then 5 in series with an 18-24v 40amp Max BMS unit, each cell is registering @ 4v individually but only reading 16v with the BMS. ...
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0answers
330 views

Li-Ion battery modification to charge with Ni-MH charger

First of all, I have to say I know "Li-Ion batteries can not charge with NiMH charging". So this question about li-Ion battery modification. 1. I found a battery from China that consists of 2 serial ...
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1answer
3k views

Identify the pins of the circuitry that resides within a laptop battery [closed]

My ASUS laptop battery stopped working all of a sudden, when it had no reason to (new). Windows says "Plugged in, charging" , but the battery always stuck at 0%. Before getting a replacement battery,...
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1answer
34 views

lithium ion battery in series discharging question

Trying to connect 4 12V 5Ah lithium ion batteries in series to make 48V 5Ah source. If my circuit is running on lower amps than 5, lets say 1A. Is the batteries going to be fully discharge in 5 ...
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2answers
64 views

Li-ion battery voltage?

My laptop battery is assembled from 4 cells in series. And the voltage of them all is 16.5V, (on battery it writes 14.8V). Can one cell be faulty even then? Is this a sign that battery is faulty, ...
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1answer
67 views

Li-Ion vs Li-Poly For Quads

Instead of using a $25 Li-Poly battery with a $10 charger, I was going to use one of these- https://hackaday.io/project/46436-3-cell-rc-battery-pack-made-with-18650-batteries What I was wondering Is ...
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0answers
72 views

Weird Li-Ion parallel issue - are the protection boards fighting each other?

So I have a very strange issue I need help with. It has to do with connecting 2 of these in parallel: They have a protection board for each of them, the DW01-P and a dual FET. The boards in this ...
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1answer
75 views

May I replace ICR 18650 22F with 26H in Laptop battery?

As in the title, I have a worn laptop battery, made out of 6x SAMSUNG ICR 18650 22F. Now I can't find any 22F near me, nor slightly farther for a sane price. But SAMSUNG ICR 18650 26H are practically ...
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0answers
41 views

UPS VA vs battery current drain

My UPS is dead, or more correctly speaking, its battery is dead. I want to make a lithium battery pack to replace it instead of buying a new lead acid battery for it. Here are few questions: 1, it's ...
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1answer
275 views

Charging Li-Ion 4S with TP4056 (DC isolation)

I want to power a "suitcase boombox" amp using 4 Li-Ion 18650's. To charge these batteries I'm thinking TP4056, because they're small cheap and have nice charging features. From what I have read so ...
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1answer
7k views

How can I use two TP4056 with two li-ion batteries, but single load?

I have two TP4056 modules (with protection circuit), which I am using to charge two batteries respectively, off a single power line. The modules are the ones that have charge output (B+/B-), and ...