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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83 views

I have to build an LED lamp with a lithium battery [closed]

I don't understand much about electronics, I just know that the battery is very dangerous. These are the links of the components that I will use: BATTERY 3.7V 4400mAh LED 11,9V 1050mA STEP UP BOOST ...
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2answers
77 views

Does the effective reluctance of an air gap between two windings increase from circulating air?

If I have an inductor next to another copper coil (I don't exactly know the lingo for a coil receiving power from an inductor), and there is a significant but not large air gap between the two coils, ...
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1answer
60 views

How to separately charge two LiPo batteries wired in serial?

I would like a circuit where 1) two protected LiPo batteries are wired in serial to power the load; and 2) when external power is plugged in the load is disconnected and the batteries are charged ...
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1answer
41 views

What is this MAX17043 LiPo Fuel Gauge connector size?

I believe this is a type of JST connectors. I bought one piece, and I now need to .. modify my existing lipo battery connector (my connector is smaller) buy another lipo battery with the same ...
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0answers
36 views

How to do a solar charging circuit and a discharging circuit to a single battery?

I have a solar charge circuit with 6v solar input and a 5 V, 1 A USB output and connected to a 3.7V LiPo battery. Since I needed battery % display 5 V, 2 A USB output I needed to add a circuit for ...
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18 views

Lipo battery with ESC and BLDC motor

I'm not sure if I can connect four brushless dc motors to my Lipo battery. I don't know how to calculate it. The brushless motor I have is the Turnigy L2210C-1200 brushless motor (150w) and the Lipo ...
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3answers
95 views

Waterproof charging of LiPo

I found this thread: Wireless charging Lipo batteries My problem is slightly different. I have 2s Lipo that I need to charge (way less than 1c, overnight is fine.) The problem is that the casing needs ...
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0answers
146 views

TP4056 with load sharing

Does the TP406 with protection also needs a load sharing circuit? I got the following schematic. But I saw this post on load sharing. Can I add that to this design too? I could not really find a good ...
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51 views

Would this LiPo 3.7v -> 3.3v schematic be feasible?

I'm basing part of my design off of another schematic. It powers an ESP32, which can pull up to around 300mA at WiFi spikes. I am planning on using a LDO regulator to bring 3.7v LiPo voltage (then ...
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1answer
63 views

Li-Po protection circuit DW01A turned off output

I have a strange problem where a LiPo charger circuit built on TP4056, DW01A is not working and <1 V comes as output. I have connected the output from charger circuit to a 3.3 V LDO. I have checked ...
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3answers
53 views

How do you charge a LiPo and manage system load (using solar power)

I am designing a wireless sensor node and want to implement a solar power charging circuit. From my research, I'm aware you shouldn't use a LiPo to power your system load while it's being charged. ...
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3answers
132 views

Can DC DC converter (CCCV) + BMS charge Lithium Polymer batteries

I need some help in clarifying my understanding on charging Lithium Polymer batteries. Context: I am trying to build DIY vacuum cleaner bot. For that I need a LiPo batteries which bot could charge ...
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1answer
95 views

What is the reason that a puffed LIPO battery returns to normal after recharging with CC/CV?

I have a 10S 36 - 42 V LIPO battery with all cells puffed due to prolonged not being used. I recharged the cells one by one 4.2V max under CC/CV conditions and they regained their normal format. The ...
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0answers
27 views

Battery pack for very slow charging of USB device

I have a GPS device that has too small of a battery pack (300mAH) and only lasts a month or so - I want something that can last 6 mo to a year. It can recharge from a USB connection, but only draws ...
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1answer
39 views

Arduino Lipo Battery Voltage Reading

I would like to read the voltage of a Lipo 4s battery with an arduino. The arduino can only support 5V in input, so I made a shematic of my voltage divide. Can you tell me if it is correct ? ...
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46 views

Low power design - Adjust Vout of a adjustable LDO with feedback voltage from Lipo

TL;DR: Using LDO to drop voltage from Lipo to stable 3V LDO Vout can be adjusted with Voltage Divider Lipo from 4.2V to 3.4V, Vout = 3V Lipo below 3.4V, Vout = 2.3V => How to adjust Vout of LDO ...
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1answer
76 views

How does a boost converter behave when used as a battery charger?

I'd like to use a boost converter as the primary power supply for a lipo charger. Disregarding the BMS, which will be a separate component, how does a step-up boost converter behave when used as a ...
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1answer
48 views

What determines the load output voltage of this Adafruit solar charger?

I am looking at this board from Adafruit. It seems like it could work in my project, but I have some concerns about the maximum load output voltage. My understanding of this board is that I can ...
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0answers
50 views

Is a LiPo battery cut-off voltage open-circuit or under any conditions?

I'm working on battery management system firmware for a battery pack consisting of these cells. The battery pack powers a motor that, of course, when pulling current causes the voltage of the LiPo ...
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3answers
66 views

Does li-po battery work when it is connected to a charger?

If I connect a li-po battery to charger without connecting the charger to a USB power supply, would my battery lose power?
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0answers
68 views

Need help on inproving this 7.4V LiPo battery bypass circuit design

I came across this 4 year old post where this circuit below was the answer to use and charge a 3.7V Lipo Battery, as a Li-PO bypass circuit. POST simulate this circuit – Schematic created using ...
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0answers
56 views

Choice of voltage regulator for a battery powered Raspberry Pi Hat

I'm building a robot controller hat for a Raspberry Pi 3B+ as an hobby. I made a first working version using evaluation boards and prototyping boards. Now I want to tighten the design and make a PCB ...
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1answer
68 views

Using a rechargeable LiPo/Li-ion battery as "burst" current source

For a project I'm working on, I need to run a motor for a few seconds (somewhat rarely). The motor requires 24V@1A. The rest of the circuitry runs on 3.3V@300mA. My general thought is to use a 3.7V ...
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28 views

Looking for feedback for LiPo based power supply circuit

I try to design a LiPo powered circuit that should meet the following requirements: Undervoltage protection Overvoltage protection Reverse polarity protection Battery voltage measurement Push button ...
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1answer
56 views

Adding mods around a TP4506 (Led indicator + use load while USB plugged)

This is my first post here, I'm looking to achieve some modification on my GBZ power part. I'm currently using: LiPo Battery 3.7V 4000mAh Micro USB charger TP4056 MT5608 Volt Booster (output 5V) I'd ...
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0answers
55 views

Analog LTC3106 issue

I'm trying to use LTC3106 to provide 3.3V for my SAMD21. The goal is to use the sun when it is available (and recharge the battery with the excess) and use the battery when there is no sun. Here is my ...
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0answers
38 views

Battery for GPRS module and voltage regulation

I work on a wearable GSM device powered with a LiPo battery. I want to use a switching charger with a power path. My GSM module can consume up to 2 amps during data transmission and its working ...
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2answers
46 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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0answers
35 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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2answers
59 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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0answers
46 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
93 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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0answers
99 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
52 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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0answers
109 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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0answers
188 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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0answers
79 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
67 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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0answers
31 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
66 views

Is the TP4056 for lithium polymer or lithium ion batteries?

Can I use jit for charging Li-Po?
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1answer
32 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
95 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
47 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
59 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
64 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
151 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
1k 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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0answers
28 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
66 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
125 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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