Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

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.

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

655 questions
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LiPo charger MCP73831 does not light an LED with it's STAT pin when done charging

I'm trying to charge a LiPo with MCP73831 with 2 LEDs for status. I have an amber LED D1 which is on when VUSB is getting power from the USB connector, which means that it's charging. And a green LED D2 that should also light up when the battery is…
Alex Wayne
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Calculate battery percentage on LiPo battery?

I have voltage measuring on my LiPo battery that is defined full at 4.2V and empty at 3.2V. This reading is very accurate but I want to convert this to percentage numbers. I know that the percentage of energy left in the LiPo is not linear to the…
C. K.
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Low voltage protection for a LiPo

I am building a vaping mod box. I am using two LG HG2 18650 LiPo cells in parallel1, 2P, and require low voltage cut out, of around 3.8V2. The current draw will be up to 10-15 A (max). I have looking for a solution for about a week now, and have…
Greenonline
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Convert LiPoly-Voltage to charge state

I'm using an ATmega32u4 (Arduino-board) and internal reference to measure the VCC voltage (handheld device with LiPoly-battery). For a very long time I'm getting 3.27V before it drops when it is near the end. How usually the measured battery voltage…
Thomas S.
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LiPoly batteries and 3.6V digital ICs

Li-Poly battery voltage changes a lot while discharging — from 4.2V to 2.7V. Most modern digital ICs (I'm currently thinking of Cortex-M3 microcontroller and an RF module) require input voltage levels of 2.7V-3.6V. So, I think that connecting them…
Catherine
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Explanation of Lipo Cut off Circuit

Im new to electronics and have been trying to devise a cutoff circuit for a 2s 7.4v Lipo Battery. I have found a few places that have the schematics but am unsure as to that parts are needed for a specific layout. see the link bellow. Adding voltage…
user27686
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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 puffing disappeared. I would like to know more…
Decapod
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Safely storing Lipo batteries

Two parts to my question. I see multiple suggestions to use the fiberglas bags for storage of Lipo batteries. How do these help prevent fires? With the oxidizer a component of the Lipo battery, would storage in an all-metal ammo can be a good…
John Dahlke
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Sense resistor connection

I'm looking throw bq76940 datasheet and I've found such connection of sense resistor: What is the purpose of the additional resistors and capacitors? Why all 3 capacitors are required?
ft232r
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What is the "C rating" of a LiPo battery determined by?

In a LiPo battery, we find the "C rating" to be the maximum discharge rate (current draw) in terms of C (the capacity of the battery divided by one hour). But, what determines this value? Does it have something to do with its inside chemistry? Is it…
Iaka Noe
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TP4056 Lithium Charger cut off voltage

This module that I got from ebay has a cut-off voltage of 2.5V which is way too low. At that point your Lipo is probably dead. Anyone succeeded in increasing this to higher voltage? I would like to have it at 3.3V .
bortek
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Is Li-Po battery safe to bring in flight

I am going to bring my device with me on flight, and I have this battery : https://www.coolcomponents.co.uk/lithium-polymer-battery-1000mah.html installed within the device. I am wondering if this battery is safe for flight? Should I bring it with…
SAM
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Charging Lipo under load

I want to use a 2s Lipo for a autonomous car built with a Beaglebone and Motor Bridge Cape from Seeedstudio. The Motor Cape has an built in voltage regulator which steps down 7,2V to 5V system voltage. This allows supplying motors an Beaglebone…
Timm
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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 connected thru' a marine switch so that I can…
Rick
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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 connector which I have removed from the board and with a…
Alan A
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