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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Can we charge a 12S LiPO battery through a DC safety switch?
I'm working on a robot that uses a 12S battery as its main power source. The problem is that wanted to add a short circuit protection and an overcurrent protection, so added a DC automatic safety ...
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What is the purpose of N channel MOSFET in this schematic?
I have a developement board and I have found the schematic of it. However, When I skim through schematic, I came across this charger and boost circut but I couldnt figure out what is the purpose of N ...
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Charging a super cap with a Li-po battery while maintaining charge
I have a 3 V 100 F capacitor and 400 mAh 35 C battery, the battery is to be charging the super capacitor and maintaining charge until a button is pressed to discharge the super cap. I am stuck with ...
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Auto power switching between USB and a range of Lipos (1S-3S)
I'm designing a circuit used in a portable device. I want the option of powering the device over USB or from a range of different Lipo batteries (1S-3S).
I want the circuit to auto negotiate between ...
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Can I use a MAX17262 to measure battery capacity of a 300mA 3.7V Lipo?
First, I a very basic understanding of lithium based batteries and from what I have learned, gauging their capacity can be quite complex. I was looking into MAX17262 as a fuel gauge to measure the ...
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Safely Switching between LIPo batteries
I run two 12 V LiPo starter batteries in my race bike. They only power a starter motor and the ignition in a total loss system. They are rated at around 10 Ah each and are different brands. They are ...
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Reverse voltage protection for four 18650 cells
I would like to protect my robot from reverse voltage which is powered by four 18650 cells. Is option 1 sufficient or do I need at least three diodes? I know that using diodes comes with a voltage ...
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Powering a dc brushless motor with lipo battery
I am trying to control a brushless dc motor. I have a H-bridge style MOSFET circuit and am controlling the gates with an Arduino. However I am trying to power the motor with a 7.4 V lipo battery (...
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Redundant LiPo protection circuit needed for charging application?
I want to charge a Lipo battery with a TP4056 circuit. Custom PCB.
The Lipo I want to use has an integrated protection circuit, but what is protected is not specified exactly.
In a typical TP4056 ...
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Passing generic DC load through USB pin on BQ2403 IC
I'm looking at this (BQ2403) Li-po charging IC and am wondering if there is any reason I couldn't pass a 4.2v DC load through the USB pin instead of straight USB. I feel like this is dumb, but I'm ...
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How can I increase the capacity of a 3.7V lithium polymer battery?
I have a Raspberry Pi Pico W that I want to power using a battery. All the 3.7V lithium polymer batteries I can find are up to around 5000mAh which doesn't power the Pico for too long. Ideally I want ...
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Can I power a circuit from the balance cable of a lipo battery?
Hello I want to power a circuit (that runs at 3.3v) with the balancing cable of a 3s Lipo Battery, my plan is to use only 1 cell through an LDO to power my circuit.
My question is can I power it ...
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How do you create small devices that can remain "dead" for a very long time without damaging the battery?
I'm working on a product that uses a very small 20mAh lipo battery. The device only needs to operate for 8 hours, and that's not a problem. However, I expect that customers may run the device until it ...
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The most minimalistic solar charge controller possible: will it work?
I want to build a solar panels device that can supply power to my doorbell, which is installed over a gate with no access to wires or power. The gate has a "bar" on top where I can install ...
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Can I use this battery for my circuit?
I plan on having a circuit that connects a 3.7v Lipo battery to a 1.4 ohm coil.
However, I just saw this table for the battery I am using and noticed it has a max discharge of 0.4A
Does this mean I ...
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Do camera batteries require a seperate protection circuit (lithium accu 1s)
I have a lot of old camera batteries lithium 3.7 V rechargeable accus (1s), because such handheld cameras keep dying due to lens failures (lots of sand and wind here).
I want to be able to reuse those ...
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ADC is not correctly working
I build this schematic that was recommended to me in this thread:
My entire schematic then would be:
And this is how it looks on the PCB:
If I attach a 4.15V battery, the differential between VIN+ ...
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Lithium Battery Protection DW01
I'm using DW01 to protect LiPo batteries. But since there are more than one source of voltage in the circuit, I need to add a diode to DW01's VCC pin for the situations that battery is removed and ...
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Read battery voltage with ADS1110
I have an ADS1110 that should read a battery's voltage (2.8V - 4.2V).
I have built this schematic:
The problem is, I connected the battery's negative terminal to VIN- and the PCB is already assembled ...
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Lipo battery not holding charge
I have a DAB radio which has a 7.4 V 2000 mAh LiPo battery which recently stopped holding its charge.
I purchased a replacement battery, 7.4 V but 3000 mAh. The old battery had a single 3 wire ...
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Behaviour of my Battery Management System Schematic
I am trying to validate my schematic of a battery management system based on the DW01A for single cell protection, I have 3-series (3-S) Li-Po cell battery pack so I am using three of this integrated ...
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What is the difference between PACK- and BAT-?
I have a doubt about what is the difference between BAT- and PACK- in this battery management system available in a github project:
As I read in the datasheet of the BQ76920, the N-Channel FETs are ...
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Quiescent current in battery circuit
In this circuit I'm using an MCP73832 for battery charging and an AP2210 LDO. The mosfet is a DMP3099L. With the USB disconnected, VBAT set to 4.2V and the MCU (STM32F030F4P6) in standby mode (drawing ...
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Specific Li-po, Li-ion and charging facts (low intensity, slow)
I have the following battery, but not its original charger:
12 V, 4.0 Ah
Cell Balancing Longer Battery Life Increased Battery Lifespan. Higher Battery Resources Due To Evenly Used Cells.
BTW ...
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What is the function of this pin in this BMS schematic?
I am implementing my own 3-cells battery management system charger based on the BQ76920 but I have a doubt about the REGOUT pin, in the datasheet it says that pin is the output of LDO (Low-Dropout ...
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Battery charger bypass with diode
I'm a bit of a noob, I have a battery charger circuit connected to a step up converter to get 5V (see 1st image below). The 5V feeds a circuit that draws between 50mA (standby) to 500mA (on).
The ...
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Can I charge 604050 LiPo battery using USB charger and single resistor?
The battery I got off Aliexpress has a protection chip:
I'm wondering - Will the chip protect the battery against overcharging if I use a standard 5V USB charger and a single resistor in series?
...
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USB-C power delivery for charging a Li-po battery
I want to redesign my custom PCB to use it with USB-C. I want to charge my Li-po battery with USB-C with a current of 1 A.
Can I connect 5.1 kΩ pull-down resistors to the CC lines and should this work ...
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ESP32 and TP4056 lipo charging
I'm currently working on a project involving an ESP32-S3 Microcontroller. I want to implement a few things that are very hard for me to figure out. This is my current TP4056 charging logic + battery ...
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Can I use this MOSFET instead of the standard FS8205?
In my current circuit, I have the FS8205 MOSFET in combination with a DW01A for lithium battery protection, but the MOSFET is out of stock. I found another MOSFET labeled "FS8205A". Can I ...
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Does this mini LiPo battery have a built-in BMS?
I got a 260mAh LiPo battery from Aliexpress fot which I have very little info. I noticed that there is a small PCB bundled together with the battery.
Some images:
The markings on the ICs are as far ...
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Supplementing USB power with batteries
I am designing a custom USB hub for a project that will be primarily connected to a Surface Pro or laptop. One of the peripherals that I am using is a camera that consumes quite a bit of power from ...
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Battery charging circuit barely charges
The circuit in the picture is designed to charge a Li-po battery from USB.
The MCP73832T-2DFI/OT datasheet says that a PROG resistor of 10 kΩ should charge at around 100 mA. When initially powered up ...
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Voltage Regulator: MCP1700-3302E (TO-92) current output too low compared to datasheet circuit
I'm currently using a pack of MCP1700-3302Es that I purchased online that I plan to use for a project. The project intends to use a 3.7V Lithium Polymer battery; I'm currently testing with an input ...
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Is my 2S Lipo charger design with bypass while charging correct? Need some help on isolating the charger from the battery while not charging!
I'm using a circuit to charge a 2S lipo battery, and bypass the battery while it's charging, and still supply energy the circuit.
It works. But for the new charger module I'll use now, when the ...
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How is the output of an MPPT solar charge controller connected to a battery?
I have some confusion about how the output of an MPPT solar charge controller should behave. In my head, I'm thinking of a perturb and observe system where the output should oscillate around the ...
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Custom conversion of 100 year old navigation lamps to LED
My dad has a 100 year old sailing yacht that he's spent the last 37 years restoring and is almost finished. One of the last few things is the navigation lamps; these would normally use kerosene, but ...
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Parallel Li-po battery and load with simple charger
I am building my first battery powered board, powered by a 14.8 V Li-po battery. I want to allow the user to continue using the device while charging the battery, and have been reading about load ...
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Li-po battery reported voltage has deviations. Why?
The chart below is a 4 hour logging of a 3500 mAh Li-po battery voltage (no charging - powering up a Raspberry Pi Zero W). The charging board uses BQ24160 chip to read the BAT voltage.
I use 3200~4200 ...
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Power microcontroller directly from pins on a the LiPo battery charger board
I have a project that runs off a 1200mAh LiPo battery, which can be charged with a Mini-USB charging board to 2-pin JST as shown below.
I want to stow everything in an ABS plastic case and only expose ...
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Why is charging with Lithium batteries with a small load dangerous?
I'm well aware of the best practices for charging lithium chemistry batteries, and how the charges themselves work.
I've never had a water tight explanation on why having a load on a battery during ...
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Candle light flashing LED (max. 5V) burnt by attaching LiPo battery (3.7V)
I've bought a couple of candle light flashing LEDs with integrated circuits from Octosupply (Datasheet: https://www.micros.com.pl/mediaserver/info-olc.5c5800m.pdf) for a project and attached one to a ...
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Vehicle power vs Li-po battery power: ground potential difference
I have a device that needs to plug into automotive power (via the OBD-II connector) and also has a Li-po battery so it can continue to run for several hours after being unplugged.
Additionally, for ...
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Sony NP-FW50 battery hack/upgrade
I've been searching for ways to expand the battery life of my old Sony A7s II DSLR and the best I can think of would be to build a custom battery using bigger LiPo cells. There are two 3.7V small ...
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Capacitors draining battery in typical design MCP73831
Background
I am an electronics hobbyist and working as a software engineer. I would like to make my own wearable rechargable device (Nixie watch). In fact, I already made a Nixie watch and used an ...
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How do/can I charge a Li-po battery without a fancy charger (just using a current)?
I am designing a model airplane that flies using solar cells on its wings. I have a 7.4 V, 2200 mAh battery I want to use for it in case it flies in a cloudy area and needs more power, but everywhere ...
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How to convert 14.8V from Li-Po to 5V without producing heat? [closed]
I have a 14.8V Li-Po battery and I want to stepdown the power to 5V 3A as efficiently as possible without producing much heat. ...
user323657
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Connecting 3 Li-ion pouch cells in series with BMS
I have three 2000 mAh, 3.7 V Li-ion pouch cells.
I want to connect these three cells in series to get 11.1 V and 2000 mah
I made 11.1 V out of three Li-ion cylinder cells before; I used a BMS.
As my ...
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ESP32 with Li-po PCB review request
I'm making a calculator based on the ESP32 and this is my second iteration of the PCB.
It's using a CH340C for USB to serial, and a TP4056, a DS01, and a SDB628 for battery charging/protection/...
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MAX17048 wrong SOC readout
I have a LiPo battery connected to my device and to the MAX17048 chip. Battery has a cut-off voltage 2.75V.
Unfortunately, the IC does not detect the SOC level properly, see the example read log of ...
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