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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Slightly swollen lipo battery for drone [closed]

My drone battery is slightly swollen. I have read that if they are really bad, they should be disposed of correctly. Mine is just slightly swollen, can I carry on using it or is it now scrap?
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72 views

3.7 to 3.3V regulation

I want to power up my ESP32 with LiPo battery. LiPo Battery has voltage between 3.7 to 4.2V and ESP32's operating voltage range is 2.2 to 3.6V (but I want it to be 3.3V) and it consumes around 600mA. ...
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ESC Brushless Motor Lipo Battery

I have purchased DC 12V 83.3A 1000W Power Supply and it powers 4 brushless motors A2212 1400KV Brushless Motor. I have checked the Motors and they require 11.1 V and Load Current: 19.0A Power:210W. ...
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Battery supervisor circuit question

I am working on a digital watch just for fun and learning. It is powered with a small "3.7 V" LiPo and the 3.3 volts for the primary circuit will be supplied from "3.3v Voltage ...
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79 views

Limiting current to diode

I have a circuit here that does two things: Charge up a LIPO Battery (3.7V/3800mAH, Connected at B+/B-) via 5V power from another circuitry. When the circuit is not charging, the LIPO battery will be ...
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Charging a LiPo using Battery Protection Circuit

I have an application where I power an ESP32 from a LiPo battery. Between the LiPo and the ESP32, I have a DW01A battery protection circuit (data sheet is here: https://hmsemi.com/downfile/DW01A.PDF). ...
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Is TP4056 protection absolutely necessary?

My battery has over-charge, over-discharge, and over-current detection properties. Do I need to use the famous protection circuit as an extra? What are the advantages or disadvantages of this ...
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BLDC motor and bullet connectors getting hot

I am using the following components: Lemon RC 3S-2200mAh 25C/ 50C (burst) LiPo battery Readytosky 80A ESC DYS D2726-6 BLDC (2200kV BLDC motor) I am testing out the components with 1045 (10 in, 4.5 ...
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What conditions are required for a Lithium Polymer battery to ignite?

If a Lithium Polymer battery cell sustains a small amount of damage that only effects the pouch (eg a small puncture or tear in an area where no contact is made to the electrolyte / anode / cathode ...
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Using TP4056 to charge a battery with an NTC

I'm hoping its not a duplicate question but I currently have a TP4056 and the following lipo battery: Pijuice zero 1000 mAh battery. I'm fairly new to electronics and was wondering in this case what ...
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Using the battery of an old, out-of-order laptop

I have a LiPo c31n1330 battery pack from my old asus laptop. Is it possible to use it in a safe way, outside of the laptop, for something like a raspberry-pi? If it is, how should I do it? I can see a ...
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AP9211 typical charge + power circuit

I just found that AP9211 chip as cheap and alternative replacement to previous Microchip IC that price has skyrocketed and is unavailable until next year (maybe more). With previous chip there was a ...
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Faking a dead LiPo cell with a capacitor

I have several old smart phones and small laptop computers with dead batteries (LiIon, LiPo). These battery cells charge to max 4.2V. When I remove the batteries, these devices won't power on anymore, ...
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Why is my LiPo battery limiting its voltage when I turn on my DC motor circuit?

I have a circuit that is supposed to run four 12 V DC motors with built-in motor drivers off of one LiPo battery. The LiPo battery (single cell 3.7 V) is boosted to 12 V (the converter circuit is ...
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2 votes
1 answer
143 views

Why is switching off GND instead of VCC a bad idea in battery powered application

I'm currently tasked with designing a battery-powered device (i.e. it will be connected to two four-cell LiPo batteries, each with a voltage of 14.4V to 16.8V) and am having quite a hard time finding ...
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What is the difference between MCP73833-BZI and MCP73833-FCI

These are two variants of the same battery management ICs, I think they have different parameters, but I'm not sure how to interpret them. From the datasheet these are the specs difference: I have a ...
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Is this current and resistance OK for this CC-CV IC and battery?

I want to charge/recharge this battery in 'fast charge mode' which corresponds to supplying a 60 mA of current using this IC which (according to the equation on page 15 of the IC's datasheet) requires ...
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1 answer
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What is the proper connection method for this LiPo battery?

I salvaged this LiPo battery from an old bluetooth speaker. I'm wondering how to properly test the connections to ensure I charge it correctly and how to wire it into the Arduino project I'm working ...
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Just making sure I have this right before I start welding

I have an RC project that requires a 3S battery pack. I am making my own, but want to make sure that I have my cell configuration right before I start spot welding. I am 99% sure this is right, but ...
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1 answer
63 views

Limit Charging Current of a 3.7 V, 300 mAh Lipo Battery

My Lipo battery is 3.7 V, 300 mAh and the charging current normally is 1C (300 mA). I am using a charging module TP4056 rated at 5 V and charging current is 1 A. This is obviously more than 1C. My ...
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Modules for powering and charging 3.3v and 5V projects

I've little experience in the nitty gritty of electronics so am looking to inexpensive modules that can help me achieve my goals. Specifically I have ESP32 (3.3v) and Arduino Nano (5v) projects that I ...
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How to charge two series 3.7V li-on batteries with TP4056 Charging Module

I use two 3.7V Li-on batteries in series for Arduino Nano. To charge them, I use a TP4056 Type-C charging module. But it just charges one of the batteries. If I use two TP4056 charging modules and ...
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LiPo Charge Boost circuit doing funny things

I am hobbyist who’s been working for two years on a project. I’m currently having an issue with my power circuit. It consists of three “families” of parts; we have: TP4056 - LiPo charger IC SDB628 - ...
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2 answers
51 views

How is the overcharge protection working for USB-charged mini- LiPo packs

I looked into my tiny bluetooth speaker (LOGILINK SP0054BK), and found that the board only contains a 5856ESE, handling the bluetooth side of things, and a NS4150, handling the audio amplification, ...
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Will swapping a dw01a for a dw01a-g

I am designing a circuit for my charity in honour of my stepson who passed away aged 2. I know so much but sometimes get stuck. I am designing the PCB half myself and then half a lipo charger from ...
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-7 votes
1 answer
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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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2 answers
91 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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1 vote
1 answer
94 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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2 votes
1 answer
69 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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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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1 vote
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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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2 votes
3 answers
104 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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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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119 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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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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1 vote
3 answers
64 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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3 answers
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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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1 answer
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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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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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1 answer
51 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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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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1 vote
1 answer
110 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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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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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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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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146 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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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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1 answer
82 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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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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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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