Questions tagged [lipo]

Questions regarding Li-Po batteries (Lithium-ion Polymer, Polymer Lithium Ion or more commonly known as Lithium Polymer), including proper charging and usage.

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41 views

Problems with LiPo Volt buck boost for a LED

I need a little bit of help in understanding buck-boost converter. I have 4 LiPo 18650 batteries in series an BMS to charge and discharge the batteries properly. After that I added the buck-boost ...
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27 views

ESP8266 Button Latch - Always On

I'm trying to build the following: Press the button shortly, the ESP8285 should turn on. GPIO16 can then be used to turn off the circuit. The button press should latch the power on. The problem: When ...
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56 views

Need help on latching circuit turning on without pressing on/off button when battery is inserted

I have this latching circuit to turn on and off an MCU (ATTINY 167) and a led Driver, by using a 8.4V Lipo battery. It works fine: pressing the button turns it on and pressing again turns it off. Also,...
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39 views

What does 2.5-3.0V mean on BMS specs?

I'm looking at buying a cheap eBay BMS to prevent overdischarge of a Li-Ion battery, but I'm confused about the specs. Basically every BMS I can see lists the overdischarge cutoff voltage as "2.5-...
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2answers
66 views

Copper Plane Oz and Max Amp Relationship

I am attempting to design a power distribution board for up to four ESC controllers that can draw a continuous current of 40 A per ESC (so 160 A), from one LiPo battery. Additionally this board will ...
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39 views

How can I use 2 TP4056 to safely discharge 2 18650 cells in series

I am new to electronics. I have made a robotic car type thing with arduino and L298N and I want to power it using two 18650 ...
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1answer
40 views

Arming A Brushless Motor Controller Connected to ESP8266

I am trying to control a brushless motor with WeMOS D1 ESP8266 The motor controller and motor specs are below: https://www.ebay.com/itm/114619313561 A 11.1v LiPo battery powers both the controller and ...
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48 views

Lipo voltage sensor Arduino

I am making a drone with an Arduino Nano. To power my brushless motors and my ESC (Electric Speed Controller), I use a Lipo battery which is connected to a PDB (Power Distribution Board). I did not ...
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35 views

Replacing AA battery source with LiPo

I have a brother label printer that usually runs on 9V DC source or 8x1.5V standard AA batteries. The DC input jack on brother died so I decided to replace it and try to upgrade it to Li-po battery ...
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31 views

LiPo batteries chargind ESP32

In my project, I am using an Esp32 powered with a LiPo battery of 3.7V. I do not have a battery charger, can I charge the battery by plugging the esp in with USB? Does it handle reverse current in ...
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52 views

Monitoring a LiPo battery while powering the Arduino

Well I am tring to make a circuit to charging lipo battery then use lipo. while arduino nano using lipo battery, nano measuring the voltage level of lipo. I am planning to make deep sleep if voltage ...
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65 views

Linear regulator to step down voltage from 3.7V to 1.5V

I have a coreless drone motor that connects to power through MCP73833 that connects to a 3.7V LIPO, but the motor is too loud so I want to reduce the speed a little. I figured, the easiest way to do ...
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1answer
29 views

Battery charger MCP73831 (2-OT) doesn't charge LiPo battery

I work on a wearable, battery powered device. When it is connected to an external power source it's supposed to charge the battery and switch load to that source. I use LiPos 1000-2500 mAh. I've ...
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27 views

Can I apply fixed DC voltage to cluster of LiPO batteries to charge them?

I know the "proper" way to arrange LiPo batteries (18650's) is to isolate them as single cells. But for now I'm retro-fitting a cluster of 6 batteries (2 groups in series, each group having ...
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1answer
48 views

Is the TP4056 for lithium polymer or lithium ion batteries?

Can I use jit for charging Li-Po?
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1answer
27 views

Connect esc controller to LiPo battery

How do I connect the following battery and esc controller? They don't seem to fit as it is. Do I need another connector? 11.1V 2200mAh 3S 30C Smart LiPo Battery IC3 GoolRC 3660 3300KV Brushless Motor ...
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2answers
60 views

Solar panel does not charge after lipo battery is low

I am trying to run arduino with solar panel, I have a project for farming so electrcity is problem. I need to use a independent energy. I bought Solar Power Manager 5V SKU DFR0559 and a 2000 mAh LiPo ...
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1answer
41 views

Is it safe to charge a LiPo battery with a Li-ion battery charger circuit?

My PCB includes li-on charger(3.7V) circuit with BQ25060. BQ25060 is to charge single lion battery according to datasheet. I bought new liPo battery(1S,3.7V,1550mAh).But, There is not information ...
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0answers
39 views

Best way to power my 3.3V circuit from a battery with ultra low current requirements

I have an application featuring the ESP8266 and I am trying to figure out the best but more important right way to power it. The ESP is the only main load in my application, its current draw will ...
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3answers
48 views

Balance charge unknown number of LiPos in series

This exact question has already been asked here, but no answer was given so I'm reposting it. I want to charge an unknown number (between 1 and 8) of 1s LiPos in series with my balance charger (ISDT ...
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1answer
39 views

Can I run TP4056 modules from the same DC power source?

I am trying to set up a balance charger for 3S 11.1V LiPo battery using cheap components. I have a PC power supply and several TP4056 modules. However, there seems to be something wrong with the ...
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1answer
90 views

What cell voltage should I use to charge a 2S 7.4 V LiPo battery? [closed]

My battery charger asks for a cell voltage. To charge to full, should this be set to 7.4 V or is the 7.4 V split between the two cells? If you know of any good resourses to look at on batteries that ...
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23 views

LiPo balanced charging circuit from USB, controllable by a Raspberry Pi

I am building an RC car controlled by a Raspberry Pi, and I'm not sure how to go about setting up the power delivery circuit. I plan to power it with a 5200mAh LiPo battery, 2 cells, 50C rating @ 7.4v....
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1answer
61 views

Capacitor for reducing voltage drops

I use gsm module, which makes current bursts up to 2Amps (maybe slightly more). That causes voltage drops about 0.5V on my power supply (I use lipo battery), and than device hangs up or starts ...
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1answer
98 views

Li-ion vs Li-Po batteries cut-off protection

I am confused with the differences between Li-ion batteries (like 18650) and Li-Po (the flat ones). I know that basically they are both lithium ion, but when I want to buy I see that LiPos have always ...
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49 views

Charge device and power other devices over the same USB port

I'm creating a raspberry pi based mobile device. It has a LiPo-battery and a lipo charger, which will power the raspberry pi. The device should have one usb port, over which the device can be charged ...
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25 views

Does Sony NP-F type (generic) batteries have any over discharge protection circuitry inside?

I use these Sony NP-F550 or NP-F570 Li-PO generic batteries (8.4V) for video light and for powering my DIY projects. I've read you shouldn't discharge a 8.4V Li-ion (it's a double 3.7V cell inside the ...
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1answer
187 views

Solar lipo charger: circuit design and validation

I was looking for some simple and cost effective solar lipo charger for my DIY projects...I've seen the GreatScott video about solar lipo charger and i've realized one of it using the same schematic ...
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19 views

LTC3106 solar harvester over-voltage at output during recharge

I'm using an LTC3106 in the configuration of the attached schematic: It works fine from battery and from Vin inputs, delivering the expected 3,3 V at Vout. Problems arise when, with Vin present, the ...
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1answer
41 views

Powering BLDC motors using a Li-Po battery

I'm building a self balancing cube using 3 reaction wheels much like the Cubli but smaller. I'm a mechanical engineering student with not a lot of electronics experience other than the basics. The ...
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41 views

Combine power from power supply and LiPo battery

I am working on a hybrid electric power system project which currently has a 300W power supply and a 2S-910mAh LiPo battery. I would like for both sources to provide power if the load demand exceeds ...
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1answer
55 views

Am I in danger using this lithium polymer 3S 11.1V battery?

I have an odd problem (to me, at least), and I really need some advice before tossing $40 to the recycler, as well as for my own personal safety and knowledge. I'm building a robot, and in fact have ...
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1answer
46 views

Converting 12 Volt Lipo to 5V with Buck Convertor

I'm trying to power a large bank of LEDs that require 5V at 5 amps. I plan to use a 12v hobby Lipo attached to a buck convertor to step that down. I also need to power a teensy microcontroller with ...
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1answer
80 views

Arduino system ups problem!

this is my first question in the forum because i can't find a solution on my own... i hope you can help me. Also english is not my first language so excuse my writing errors. i design an arduino ...
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2answers
79 views

Battery Protection IC (DW06D) burning LDO (MCP1700)

I badly need your help. I have a PIR sensor setup. It works fine without the DW06D LiPo battery protection IC. Yesterday I added the battery protection IC (instead of just bypassing it) since the ...
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2answers
41 views

How can I use a 5200 mAh Li-Po battery to power multiple things?

I'm building an autonomous car and have a 7.4V 5200mAh 2S Li-Po battery that needs to power the following components: Brushless DC Motor (Through ESC) Raspberry Pi 4 Servo motor Arduino Uno Another ...
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0answers
30 views

How much ripple current is safe when charging Lithium Polymer batteries?

I am looking to design and build a LiPo charger using a switching DC supply. This results in ripple current to the load, and I am wondering what ripple current is acceptable when charging LiPo cells. ...
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40 views

Unable to charge at current 500mA with TP4054

Hi I have a PCB which is operating a 5V Fan running on 500mAh 3.7v battery. The PCB uses a booster and a charging circuit. I am using TP4054 for charging module: https://lcsc.com/product-detail/PMIC-...
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1answer
62 views

What's the difference between using 3.7v and 9v as phantom for electret mic?

I'd like to pass from a mic/filter/amp circuit with the LM386 and powered by a 9v battery in single supply to a 3.7v equivalent using the PAM8403. In hi-fi audio the phantom DC is 48v. Is there any ...
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1answer
39 views

5V DC power to recharge 3.7V LiPo and power a circuit at the same time

I am building a small (~200mm High) rotating LED light assembly using approx 30 RGB LEDs. I would like to make it as portable as possible so would like to power it with something like a rechargeable 3....
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2answers
136 views

Recharging a lipo battery while using it

Right now I am designing a circuit that will charge a lipo battery via usb, using the mcp73831 (at 100mA). The battery voltage(nominal 3.7v) will be regulated to 3.3v to power a microcontroller like ...
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1answer
64 views

Differences between RC lipo batteries and Li-Polymer batteries in phones/power banks?

From what I found from WikiPedia (https://en.wikipedia.org/wiki/Lithium_polymer_battery), RC lipo batteries and the Li-Polymer batteries in phones/power banks (like this: https://www.amazon.com/gp/...
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20 views

Automatic power selection circuit with solar panel

I am working on a design which includes a power regulator , Lipo Battery and battery charger circuit. If V_USB power the battery gets charged and the MCU gets power, if no power is feed to the usb ...
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5answers
183 views

Battery life calculation - depending voltage levels

I wonder calculation of the battery life, depends of its voltage level. Basic calculation of battery life is given below: Battery Life = Battery Capacity in mAh / Load Current in mAh However in this ...
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30 views

Li4S Battery Full Error - iMax B6

I burnt 3 chargers (Imax B6) simultaneously by connecting Lipo 4s battery in reverse . All showing connection break error. I changed the burnt MOSFET (U5) in all chargers, one charger is recovered and ...
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2answers
138 views

Help me identify this IC marked “CI” next to the LiPo battery. (It's not the charger IC)

The IC (descriptor U5) with its peripheral resistors (R55, R84, R59) is right next to the battery connector, on the path prior to connecting to the battery charger IC (which is the ISL9230). The IC is ...
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23 views

Lipo Batteries PCB

I'm designing a custom devboard that supports lipo battery but I can't find any resource whereas what type of connector I need in the pcb, nor the connector per se or the footprint. Can someone help ...
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1answer
286 views

how to make perfect UPS for Arduino?

Well I am trying to make UPS, uninterruptible power supply, for Arduino Leonardo. This is my circuit I am using for lipo chargher this ICs, it use TC4056A and DW01 . I think main problem is DW01 ...
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36 views

Add a LiPo UPS without interfering with USB data

I have a device that accepts two power sources: 2 AAA batteries, and 5v via a micro-USB port. Because I loathe disposable batteries and I imagine plenty of other folks who have this device agree, I'd ...
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1answer
30 views

LiPo switch over PMOS

I try to design a circuit, where a LiPo is switched by a PMOS over a mechanical switch. Further, the USB Voltage can also occur and the LiPo should be decoupled. My first attempt looks like this, and ...

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