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.

2
votes
0answers
22 views

Context of Li-Ion MnO2 “Cell Configuration” Specification

My application supports variable pack configurations: 4S4P, 4S6P and 4S8P. Each one obviously uses a different BMS profile, and other minor changes such as charge/discharge MOSFET and fuse selections....
2
votes
0answers
95 views

How can I size the current ripple of a DC-DC converter for lithium batteries

I am designing a bidirectional DC-DC converter to charge and discharge batteries on a DC bus. The power of this converter is 50 kW and the average current in the inductor (the same as that on the ...
2
votes
0answers
68 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) ...
2
votes
0answers
212 views

Transzorb for MCP73831 USB LiIon Charger?

The datasheet of MCP73831 (a small LiIon charger device) recommends a transzorb on the USB power input (VDD) for input over voltage protection. See Section 6.1.1.2. Absolute maximum ratings for VDD ...
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. ...
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
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 ...
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 ...
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 ...
1
vote
0answers
76 views

Multi-cell Li-ion battery charging

I am trying to make a charger circuit for a battery pack consisting of 6 lithium ion batteries (cells) in series. Many battery charger ICs support multi-cell charging but do not provide cell balancing ...
1
vote
0answers
76 views

Capacitive discharge excess being used for battery recharging

I am currently designing a circuit similar to a cattle prod that is intended to be attached to a drone. The cattle prod is powered by a lithium-ion battery, charging up a capacitor and then quickly ...
1
vote
0answers
36 views

Motorcycle LiFePO 4 / Super capacitor 24v hybrid possibilities?

First please let me apologise, I’m quite frankly a complete newbie to electronics and come from a strictly design background. However, I'm really interested in learning and understanding electronics ...
1
vote
0answers
43 views

Intrinsically Safe Li-Pol batteries to 60079 standards

I have recently been looking at SAFT batteries and they have a range of Li-Ion batteries, such as the MP-144350. One advantage quoted is "High level of safety, compatible in potentially explosive ...
1
vote
0answers
258 views

Li-ion charging circuit

I have a project that I want to power with a single cell lithium ion battery, which is to be charged from a USB plug (but not from a laptop or computer, rather from a wall supply like a phone charger)....
1
vote
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 ...
1
vote
0answers
33 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 ...
1
vote
0answers
377 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 ...
1
vote
0answers
113 views

Self-charging robot safety considerations

I have made a 3S5P (18650 Sanyo NCR18650GA 3500mAh with 10A discharge rate) battery pack (about 220 watt hours when fully charged) for a robot. I'm using a BMS with balance (supports up to 60A ...
1
vote
0answers
453 views

SIM800l power-up problems

The datasheet of the SIM800l claims that currents can peak to around 2A during SIM registration and other network intensive activities. I tried powering up the module with the 5v output of a FTDI-USB ...
1
vote
0answers
417 views

ESP + Lithium Battery Potting

I'm designing a monitoring system for plants based on a lithium-ion battery and an ESP8266 (Adafruit Huzzah board). Due to the application, water may come in contact with the battery and/or ...
1
vote
0answers
247 views

Li-ion BMS/PCM Use Cases

I am building a portable bluetooth speaker. I am using 4 18650 Li-Ion batteries and using 4S 14.8v BMS/PCM charge/discharge protection board with balancing. This board works great, but the challenge ...
1
vote
0answers
308 views

Servo Regenerative Braking and Li-Ion Battery

I would like to power two of HSB-9370TH with one or two of these 7.4V Li-Ion Battery in parallel. I notice that the HSB-9370TH has regenerative braking, and my current application will have constant ...
1
vote
0answers
849 views

Using a Ryobi 36v battery to power an electric kart

I'm attempting to use a [BPL3650][1] 36v Ryobi battery as the power source for replica electric willy's jeeps I've constructed for my kids. The batteries charge fine in the standard chargers ...
1
vote
0answers
153 views

Pow Management IC: Li-Ion 2.8 - 4.2V; Sys Volts: 3.3V

I am designing a consumer Li-ion powered system with the following constraints: The system volts has to be 3.3V Li-Ion battery charging range is 2.8 - 4.2V Charging is to be done via a standard USB ...
1
vote
0answers
468 views

Measuring a 2 cell 18650 battery from ATMega328P

I'm using an ATMega 328P (which will be running arduino code) as part of a project (a bicycle lighting system). It runs off of 2 Li-Ion cells, which both are step-up-regulated to 12V for the lighting, ...
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 ...
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 ...
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 ...
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 ...
0
votes
0answers
16 views

Li-ion cell voltage balancing issue while charging

I have a two cell li-ion battery which has specifications of 7.4v, 2200mAH. I used one cell (3.7v, 2200mAH) for a required project. I discharged it and then reconfigured in to series(7.4v, 2200mAH) ...
0
votes
0answers
54 views

Adding Current limit for DIY DC-DC converter (CC/CV battery charging)

I was following the circuitry by great Scott for the DIY buck converter here: https://www.youtube.com/watch?v=m8rK9gU30v4 . Created a converter that gives 0-23V on 24V supply. After this i wanted to ...
0
votes
0answers
27 views

Connecting 2 li-ion battery packs

I have an electric scooter that takes a 60v li-ion battery,can I connect 2 identical batteries together to get longer run time ?
0
votes
0answers
44 views

“lithium for buffered usage in UPS”, or floating-charge lithium accumulator

For lead acid there are typically two paradigms of charging (or use-scenarios). First one is deep cycles, when you exaust 40-60% of capacity (not less than 12.4V), then charge it to 14.4 with ...
0
votes
0answers
42 views

How to charge Lithium Ion with protection circuitry

I am trying to build a charger for the Ctr 003 battery for the Nintendo DS. This battery has 3 outputs, which I call +, 0, and - for simplicity. When I measure voltage from + to -, or from + to 0, I ...
0
votes
0answers
34 views

Understanding MOSFETs Driven by Analog vs. Digital Signal

I plan to run a circuit with two 18650s in parallel to get 7Ah of capacity and a 3.3V rail (for running the ESP32 MCU). I'll use an LDO to get my 3.3V until the battery voltage drops to 3.3V. At that ...
0
votes
0answers
206 views

What is the blue wire for on my battery? (samsung galaxy note 10.1)

I have this battery out of a Samsung Galaxy Note 10.1 and this battery has 5 wires; 2 black, 2 red and 1 blue wire. I assume that the red wires are positive and the black wire negative charge. I've ...
0
votes
0answers
49 views

What is this “Termination Disable” pin?

I'm just looking at the BQ2407x range of Lithium-Ion charging ICs. One part in the range has an extra pin, TD, which disables/enables "charge termination". Here is the functionality description: ...
0
votes
0answers
21 views

Dedicated li-ion step up drivers

I have a design which will include the optional use case of boosting up to 7V from a li-ion battery. I can't seem to find any drivers dedicated to li-ion for this? There seem to be a few buck boost ...
0
votes
0answers
57 views

Li-ion battery and arduinos custom circuitry

So i have to design a board around a dialog SOC (DA14681). The dialog part supports li-ion batteries, it has a charger and fuel gauge and USB detection (to power device in case both usb and dc ...
0
votes
0answers
132 views

BQ24133, unable to charge the battery

I have designed the circuit around BQ24133 and in my humble opinion, chose the right components while following the datasheet. I had the PCB made, soldered the components and started testing. The next ...
0
votes
0answers
52 views

lithium ion battery capacity loss across different storage charge levels over time

We can see this simple chart in many places, however I am curious to know how the numbers work out for different starting charge levels than 40% (3.8V, ish? for li-ion). For example, how much worse ...
0
votes
0answers
35 views

How to lower voltage on condition

I have 16.4V out of a 4S4P Li-ion battery pack when fully charged, even if the voltage drops quickly when using it, my device can't take above 16V. So I need the output to be always below 16V, is ...
0
votes
0answers
71 views

12V Converter for li ion battery pack supporting 16-20 Amps

I built a 4S Li ion battery pack and I need 12V output at 16-20Amps but I have limited space (70mmx55mm). 12 V would be the best but I could also just reduce the max output from 16.8V (4x4.2V) to ...
0
votes
0answers
108 views

Master switch placement for Li-ion charging circuit MCP73871

I am designing my first Li-ion charging circuit, based on the Adafruit Powerboost 1000C, and this is what I have so far: I am probably going to also add a way to read the battery voltage based on ...
0
votes
0answers
325 views

Is this a temp sensor on my battery pack?

I am trying to modify a battery pack for a Ridgid nailgun to use replaceable 18650 Li-ion batteries. The original pack looks like this: I've printed an adapter which holds 5 cells and wires to the ...
0
votes
0answers
61 views

Is the mobile charger capable of charging an SLA?

The referenced article over on http://www.instructables.com/id/4V-Lead-Acid-Battery-Charger/ indicates a Li Ion charger for mobile phones may serve to charge a low AH SLA. I held the impression a Li ...
0
votes
0answers
80 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 ...
0
votes
0answers
120 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 ...
0
votes
0answers
88 views

Increasing the number of parallel cells for batteries

I am using Texas Inst IC 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....