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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Connecting multiple Li-Pos, each with a separate BMS
I have some 3.7v Li-Po batteries, each has a welded BMS, and they're all the same capacity.
I need to connect them to get 11.1V and also be able to charge it.
Would that be possible, or the BMS will ...
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Problem estimating LiPo battery life for powering BLDC motors
I'm trying to estimate the battery life for a system powered by a pair of LiPo batteries, in which the main loads are two BLDC motors. I estimated the battery life by dividing the battery capacity by ...
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ESP32 PCB Review [closed]
I am currently designing a PCB to be manufactured. This version is my attempt at a working prototype. I am new to PCB design but am open to accepting any help I can get!
My part is meant to function ...
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How to correctly power an ESP32-H2 board with a battery
I'd like to power my ESP32-H2-DevKitM-1 board with a 3.7 V, 2000 mAh Li-po battery.
For this I think I must use this pin: Battery-3V3
The above picture is from the Pin Layout section of the ...
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LiPo charger with load sharing
I'm trying to make a LiPo charger + load sharing module that is mostly based on the popular TP4056 charger modules, this is my schematic:
I've made the prototype and the charging and protection part ...
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Can I charge my 3S2P 18650 battery (12.6v) with a normal 12v power adapter if I use a BMS with built-in balancing+protection? [closed]
First off, I would like to stress the fact that I am no electrical engineer or anything of the sort, just a hobbyist that is into this kind of stuff. So please bear with me, as I know a few things ...
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Can I safely operate a DC motor at 40% higher voltage than nominal?
I'm aware that you can power a wound motor (DC or even stepper) if you limit the current inside the coils. You cannot just apply a higher DC voltage to them.
I'm using a DRV8871 to control a VN-C1 ...
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Modifying Li-po and NiMH batteries
I have three 2s 7.4V LiPo batteries, two balance LiPo chargers that can charge 7.4V/11.1V 1s-3s batteries, and soldering tools lying around, so I'm wondering: Can I convert the three 2s 7.4V batteries ...
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How best to charge a 120 V series assembled Li-po?
I purchased ten 12 V, 30 Ah batteries to be run in series up to 120 V. The problem is that they each come with a 12 V, 3 A internal BMS.
I assume I must disconnect their internal BMS as the combined ...
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Do I need a buck IC to get 3.3 V, or a buck/boost, or an LDO?
The voltage supply of my FPGA and sensors circuit is 3.3 V. If I use a Li-po battery with 3.7 V nominal voltage and 3 V discharge cut-off voltage (the LP-803860 3.7 V, 2000 mAh with PCM), do I need a ...
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3S LiPo Battery charging for Raspberry Pi robot project
The Project
I have build a Raspberry Pi based robot with a RPi Camera to help me learn about computer vision and obstacle avoidance. It is powered from a 3S LiPo Battery that sends its power to a DC-...
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Power distribution PCB and Li-po batteries
I am hoping to work on a project over the summer and it requires a decent bit of current. I ended up going with two 7.4 V, 5400 mAh batteries and I was planning on running them in parallel.
With this ...
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Battery life of Li-Po battery if it is under constant charging
This question is to clear my confusion because I cannot find a logical answer. Say a vehicle is installed with a vehicle tracker ...
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Powering a Raspberry Pi Zero with a Li-po battery
I want to design a circuit to power a Raspberry Pi Zero using a single-cell Li-po battery (3.7 V).
I'm working on a portable hobby project that's required to be battery powered and allows recharging ...
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Hall-effect sensor PWM jitter from switching converter
I am designing a circuit to power two magnetic sensors using a Li-po battery (nominal voltage = 3.7 V), DC-DC boost converter, and then either an LDO linear regulator or a buck converter to generate a ...
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Li-po battery: determining compatibility for replacement battery and charger
I want to find substitute batteries for a pair of heated boots (heating element in the boot sole) with larger battery capacity for longer operating time. The boots came with two 8 V, 2600 mAh ...
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Voltage drop in Li-po charging circuit based on MCP73871T
I created a schematic including a Li-po charging IC MCP73871T and a boost converter powered by USB 5 V. The switch can alternate the boost voltage output between 9 and 12 V.
Problem:
12 V state:
The ...
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Can I use a single battery charging ic to charge two batteries in parallel?
I am making a wearable device so for better space distribution I would like to use two smaller batteries instead of a big one. I've been using TinyCircuits's ASR00007 (290mA, lipo) battery which has a ...
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Issues with AP9101C Lipo protection IC and the auto-wakeup feature
I'm developing a pcb for a product powered by a single-cell li-ion battery. Since I couldn't find an appropriate battery with a built in protection ic, I decided to add one to my design. After ...
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High voltage at the Schottky's anode terminal (Hobby Li-Po charger circuit)
I'm pretty new at hardware side of things and trying to teach myself circuit and PCB design just as a hobby, so. bear with me if I'm annoyingly noob for you.
As a relatively simple first task, I ...
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LiPo Battery management circuits
I am new to creating PCB designs for specific projects and I essentially need someone to help me verify if what I have done is correct. The power source is a USB-C connection supplying 5V to the ...
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Charging LiPo Battery with Solar Panel and Water Turbine Generator
I'm looking for a way to be able to connect a Solar Panel (5.5 V / 540 mA) and a Water turbine generator (3.3 V / 120 mA) together to charge a LiPo Battery of 4,000 mAh.
While using the solar panel ...
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Can you power 2 voltage rails simultaneously using a buck-boost converter?
I am designing a custom PCB and want to power 2 rails: a 3.3V and 5V rail, with a single 250mAh LiPo battery (3.7V) and need the 5V rail to have as stable a voltage as possible.
I understand that a ...
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Use 2s LiPo Battery as Battery Cell for Microcontroller
Is there a convenient way to use a large 2s LiPo battery (such as this one) as a power source for a microcontroller and LED strip? Specifically I'm looking for the ability to seamlessly switch between ...
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Power bank or fire hazard?
I do have a bunch of 18650 LiPo cells, salvaged from various sources. Now, I happened to come across a variety of power bank cases on Amazon which mostly look like this:
Even a cursory look tells me ...
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Inquiry Regarding NTC Selection and Placement for ST L6924D LiPo Battery Charger
I am planning to create a lithium-polymer (LiPo) battery charger using the ST L6924D charging IC. Could you kindly recommend an appropriate NTC (Negative Temperature Coefficient) for controlling ...
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MCU not powering off completely
I implemented this on/off circuit that I use with a LiPo battery and a HT7833 voltage regulator. Since my MCU (ESP8266) can only handle 3.3v, I added a voltage divider for the MCU sense pin, just like ...
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2-S or 3-S USB type-c PD LiPo battery charger
I am trying to implement a 2-S or 3-S USB type-c Power Delivery (USB-C PD) battery charger.
I am using this video of reference which uses a 16pin female usb type-c connector (part: TYPE-C-31-M-12) and ...
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Replacing lipo battery with a power supply
For a project i'd like to power a brushless motor that works with esc and lipos but i need to replace the lipos with a power supply so the motor can run longer, i need 50v and need to be able to pull ...
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Is it possible to use BQ25629 as both a lipo battery charger and a stable output regulator?
I am a bit confused looking at the datasheet for the TI BQ25629 with regards to the SYS output voltage. Essentially, I have a 3.7 nominal voltage 290 mAh lipo battery that needs to provide around 100 ...
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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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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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