Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [lithium-ion]

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

0
votes
0answers
39 views

power supply help [on hold]

so, bit of a weird one, I have no formal qualifications or experience in electronics, or product design, manufacturing etc. so I have had to kind of work this out from zero. I need a 12v battery, ...
1
vote
1answer
141 views

4s battery pack, how to build?

I have 8 cells (samsung icr18650-26f), and I want to build a battery pack 4s 14.8v (4x3.7v) to power an LCD Controller Board that requires a 12v4amp input I have an idea of the design of this battery ...
0
votes
1answer
729 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 ...
0
votes
1answer
39 views

Replacement battery voltage mismatch tolerance?

I want to try replacing a proprietary battery in an electronic of mine as a first electronics DIY project. Thing is, the stock battery is 3.6V, and the phone battery I have on hand that I would like ...
0
votes
0answers
32 views

How will the batteries of new phones manufacturered two years ago, and bought now be? [closed]

We are thinking to buy Samsung Note 8; it seems to have been launched 1.5 years ago. In reddit, a user said: "Samsung still sells the phone? BTW, lithium ion batteries degrade whether they are used or ...
1
vote
0answers
38 views

help building 6S2P balanced Li-Ion battery pack

I'm trying to build a 6S2P balanced Li-Ion battery pack for a quadcopter using LG 18650 HG2 cells with pre-soldered nickel strips (1st image) so that I won't solder directly on the cell's terminals. ...
0
votes
0answers
17 views

2S 18650 Li-ion charging module with protection [on hold]

I am looking for a 2S 18650 Li-ion battery pack module that keeps the cells in check during mainly discharging (I can deal with charging them separately, but it would be nice to have that too). So ...
-1
votes
0answers
13 views

Continous Battery Discharge rate ? Vruzend Kit?

Hello im working on a project and I've calculated all the power requirements and found it to be 12V and 15Ah, so while looking for a battery I've came across Vruzend DIY kit which seems really ...
1
vote
1answer
67 views

Is charging 18650 lithium ion cells with lower current better? [duplicate]

I have a 3p12s 18650 Li-ion battery pack that I use for my e-bike. I charge it with a balance charger. I know that charging with too high current is bad for battery life. But is it "the lower the ...
1
vote
2answers
58 views

How to protect Li-Ion battery from a defibrillator pulse

I'm working on a design where the rechargeable Li-Ion battery is placed closely (attached with a magnetic connector) to a body-worn contact. The concern is that in an event of a defibrillation, the ...
0
votes
2answers
286 views

Using a tp4056 along with a BMS BOARD

Newcomer here and a total noob. Ok so coming to the question i am planning to build a battery bank with 18650 cells. I am opting for a 3s4p configuration as its closer to my operational requirements. ...
1
vote
1answer
343 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
votes
1answer
1k views

Batteries connection to load and charging port for DIY bluetooth speaker

it is my first question here, so I hope to write this in the right way. What I'm trying to accomplish is buidling a battery powered bluetooth speaker. In order to do it I'm using the following parts: ...
0
votes
2answers
91 views

Smartphone internal charging circuit type and efficiency

USB usually provides 5V (or even more, for example 9V with Qualcomm Quickcharge) and the phones contain a single li-ion cell with 3.5-4.3V, so there must be some dc-dc converter in between. I wonder ...
1
vote
0answers
34 views

TP4056 with DW01, can I use a diode to create an “UPS”? Design review

I'm studying lithium cells and their related mainstream modules. One of the most common -yet wrong- use of the TP4056 module is to use it with the USB 5V input and an active load on the output (at ...
1
vote
2answers
36 views

Should series connected battery cells have similar internal resistance and to what degree?

I have some Toshiba SCiB cells that I wish to string in 4s configuration. These are Lithium Titanate (LTO) cells. They have a 20Ah capacity and operate safely between 1.5 V and 2.7 V. The cells were ...
0
votes
0answers
22 views

check remaining charge of 28V 5Ah Li-ion battery via ESP32

I'm currently doing a project where I have to power some LEDs from a battery remotely. It's done with an ESP32 and the whole system is powered by a 28V 5Ah Li-ion battery. I am using a DCDC-Converter ...
1
vote
2answers
54 views

Should I add insulation to lithium ion battery

I have purchased a 36v 10ah lithium ion battery for use with an electric bike. I live in rural Australia where it gets very hot in summer and fairly cold in winter. I considered insulating the ...
0
votes
0answers
14 views

Disconnecting TP4056 DW01A from load when plugged into USB

I have adapted a load sharing circuit that was posted online that uses a MCP73831 to charge a Lithium battery. In my case I wanted to to use the TP4056DW01A and connect its output to to a boost ...
1
vote
2answers
2k views

Li-ion battery life after being 'completely' discharged

If the voltage of a lithium-ion cell drops below a certain level, it's ruined. Lithium-ion batteries age. [Source] As an owner of quite a lot of expensive mobile devices (lots of Apple stuff for ...
0
votes
1answer
497 views

4s4p Li-Ion battery pack charging

I've made a 16 cell battery with Li-ion 18650's salvaged from laptops in a 4s4p configuration at around 16.4V. I'm using it in a Bluetooth speaker I made with a TDA7492 Bluetooth audio board, and am ...
1
vote
1answer
63 views

Can I make endless parallel li-ion connections?

I'm looking into building my own li-ion battery pack. I read about linking the cells in parallel and in series, and how to add a BMS. I would like to build a 12V pack with a very large capacity (mAh)....
2
votes
1answer
60 views

What is the minimum charging current for NCR18650 li ion battery? [duplicate]

I need a rechargeable battery pack for my project, I need to know what is the minimum charging current for NCR18650 li-ion battery? In the datasheet, it says max charge current is 2A. what is the ...
0
votes
2answers
36 views

Li Ion CC-CV Charger needed for standard protection board? [closed]

I am currently designign a 4S2P Li-Ion battery pack. The cells I use are unprotected, so I want to use one of those BMS/Protection/Balance boards like this: https://www.ebay.de/itm/4S-40A-16-8V-40A-...
1
vote
0answers
29 views

Usability of a deeply discharged Li-ion batteries

I have a question about Li-ion batteries. About three years back I bought two Sony VTC 5 batteries for my vape. They are rated as 2500 mAh 30 A. But I quit smoking about a year ago and I left these ...
2
votes
2answers
80 views

Clear cut thing to do when 18650 Li Ion Cell Has Been Overdischarged

I think close to everyone knows over-discharge of Lithium ion cells is bad news, creating fire and chemical burn hazards. These are my cells I accidentally over-discharged two Lithium Ion cells. ...
9
votes
3answers
19k views

If Li-Ion battery is deeply discharged, is it harmful for it to remain in this state unused?

It is well known that Li-Ion batteries should not be deep discharged. But sometimes they do discharge deeply. Is it OK for the device to remain in such state for a long time (and recharge again only ...
0
votes
0answers
21 views

how to make rechargeable 2s2p 7.2v configuration with tp4056?

I am using NCR18650 li-ion batteries I need to make 2S2P configuration get higher capacity and 7.4V the same pack I need to charge with TP4056 modules. also, I am using B0505S voltage isolator as ...
1
vote
3answers
235 views

Is it OK to reduce the charging current for a Li-ion 18650 battery?

I am using NCR18650 batteries with the tp4056 charging module. When I connect the charger at 2.8 V (fully discharged), the tp4056 IC is getting hot at a 1 A charge current. Is it OK to ...
0
votes
1answer
103 views

Bad Practice - Charging Lithium Batteries while powering circuit?

I'm using a 2s BMC to charge a 2s2p lithium battery pack (7.4v, ~6Ah). The output of the charging circuit is the same as the input - they're not separate. As a result, when I want to charge the ...
0
votes
1answer
41 views

De-soldering and Re-soldering Lithium battery to PCB

Ive got a Lutron Homeworks 4 Processor that is c. 15 years old, it has failed where there has been a power outage to the processor and the lithium battery on the PCB has not been able to provide power ...
0
votes
1answer
462 views

Lithium ion battery protection IC not able to drive MOSFET

I have integrated the TP4056 charger design into my PCB. The problem is that when I connect the battery at the battery terminals, I am not able to get the voltage at its output pin. The circuit can be ...
0
votes
1answer
47 views

Can I charge this li-ion battery with this solar panel setup? [closed]

Since a couple years I've been messing around with a raspi and some motors. Building random stuff with dc-motors and such. I now want to power a self driving boat-robot with some solar power. For this ...
1
vote
2answers
483 views

Using TP4056 module to charge battery while load remains connected

I need a circuit that utilizes the tp4056 breakout board to power a NodeMCU ESP like so: tp4056 USB port connected: 18650 battery charging and NodeMCU running of USB tp4056 USB port not connected: ...
2
votes
2answers
53 views

I cannot se how the device is a buck charger when charging and a boost on the output

I cannot se how the device is a buck charger when charging and a boost on the output. Am I stupid or is the datasheet wrong? "5A Single Cell Li-Ion Switching Battery Charger with Direct Charge, Power ...
1
vote
1answer
23 views

Electron transfer and thermal efficiency in series vs single battery?

If you have 10 batteries in series all generating 5W, does every battery in the series have the same temperature as a single battery drawing 5W? I have trouble visualizing how the electrons travel ...
1
vote
1answer
6k views

Charging 7.4V Li-Ion battery

I'm making a battery out of two 3.75V Li-Ion cells to go into a speaker system that powers an amplifier. I was wondering on the PCM, how many volts would be max to charge these cells? The cells I have ...
1
vote
2answers
150 views

How to use CC/CV Charger with a DC/DC converter

I am searching for a solution to charge a battery pack (7S1P)[ICR18650] with a charger with CC/CV mode and I have a BMS for protection (I've done research to maximise the security of the battery pack)....
1
vote
0answers
33 views

Sense resistors in system-side Li-Ion charger/gauge circuit

I'm working on designing a charger and fuel gauge circuit for a premade 3S3P Li-Ion battery pack. The battery pack has basic protection circuits onborad (over/undervoltage and a PTC) and only the pack ...
0
votes
1answer
57 views

Theoretical rechargeable battery capacity question

I have very little energy usage/storage knowledge but my question will hopefully prove to be a simple one. If I have a 120 volt appliance that uses roughly 0.50 kWh a day and 600 watts at peak draw, ...
0
votes
1answer
92 views

Help me to understand VOOC fast charging for lithium ion batteries?

I know common VOOC charger have fast charging rate of 18W(9V/2A). But how it possible even current is only 2A. I mean 2A current have only stored charge 2000mAh(2A*1h). How changing voltage can charge ...
-2
votes
3answers
1k views

Charging 4 protected li-ion batteries in series

I have bougth 4 protectected li-ion batteries from e-bay (these). And I would like to know if I could charge them in series with 24V 0.5A charger (this one). Since they are protected I conclude ...
0
votes
0answers
27 views

Backup battery convert 3.6v nicad to 3.7v li-ion non-rechargeable

Have a slot machine MPU backup battery 3.6v nicad. Would like to replace w/ 3.7v li-ion and NOT have the battery charge. Was thinking I might be able to insert a diode in line with the battery to ...
0
votes
0answers
39 views

60V 5A Buck converter for CC/CV application

I need to charge a 14S LiPo from another 14S LiPo. The easiest way would be to buy a buck-boost converter with a current limitation, but I couldn't find a single one keeping up with my specs. So I ...
4
votes
1answer
50 views

Considering lithium-ion variant when picking a BMS board

I have 4 Panasonic NCR18650B batteries and want to purchase a BMS to charge them in series. The following board looks promising, but I'm not sure if it's fully compatible with my batteries. The main ...
2
votes
1answer
98 views

Actual lifetime of 18650 cells

For a project, we are currently looking at how long we could use battery cells, such as the LG 18650MJ1 at maximum discharge and maximum charge in 25°C ambient temperatures. Basically, in this case, ...
1
vote
3answers
154 views

How to connect LED strip to be powered by charger and batteries

I plan on using it mostly plugged in, batteries are there just for extra mobility and won't be used most of the time. Don't know lot about batteries so in first scheme I added a switch (pos. 1 ...
3
votes
1answer
111 views

Integrated 5V uninterruptible power supply (UPS) with a lithium cell?

I'm trying to figure out the best way to implement a UPS for an embedded system that runs from a 5V supply. Essentially the system has a 48v to 5v, 1.2A output DCDC converter that powers my system. ...
1
vote
0answers
45 views

Li-ion 3s Battery Charger with Load Sharing

I am requesting help to create a battery charger and load sharing circuit with the following specifications: 3s Lithium Ion battery 12 V at 2 Amps to power TPA3128D2 Class-D Amplifier (this is for ...
2
votes
2answers
68 views

Smart charger - how to detect current and voltage of different battery packs and then charge them accordingly [closed]

I am thinking of designing a smart charger for a few of my bikes/scooters, etc detects current and voltage of the pack (30-60V, 1-5A) charges the pack accordingly in the CC-CV mode, fast-charging ...