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.

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6 answers

Why is there so much fear surrounding LiPo batteries?

I've been trying to design a charging system for a small robot powered by a 2S 20C lithium polymer (LiPo) battery. Were I to trust everything I read online, I would believe that the LiPo will kill me in my sleep and steal my life savings. The common…
Cerin
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LiPo vs. NiMH for kid's toy

I've been researching here and on google regarding potential battery technologies for a toy that I want to make for my kids. I was hoping to get others' perspectives on this, keeping in mind that this is for a child. I'm trying to look at this from…
Dave
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Low current battery monitoring

I want to run a micro-controller from a 1S lipo through a 3V linear regulator. I need to measure the battery voltage however. The problem with using a voltage divider is that it would drain the battery over time which may or may not have protection…
s3c
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14
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4 answers

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 the CC phase is dangerous. My understanding is that…
Ben Bird
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Understanding LiPo charging / protection circuit

I'm in the process of learning to design PCBs and understanding electronics design. For a project, I need to charge a 3.7V LiPo battery. I also want to protect it from over‑charging / over‑discharging. I've been experimenting with boards that use…
ErikL
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12
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5 answers

Parallel charging of lipo batteries, maximum voltage difference?

There are numerous products that enable lipo batteries to be charged in parallel. Most sources are clear on voltage and capacity requirements, which follow pretty directly from basic circuit calculations: batteries must be same number of cells mAh…
Mark Harrison
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3 answers

NiMh or LiPo batteries for unattended charging/usage

I'm in the planning stage of a summer project: A WiFi controlled robot for remotely monitoring a shore home. The robot will consist of a 4-wheel platform (4 motors, 1 A stall current each, 7 V), Raspberry Pi Model A + WiFi dongle, and Raspberry Pi…
Chris Laplante
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Before storage why should a Lithium Polymer battery be charged up to only 40-60%

While storing a Lithium Polymer battery cell or a device with a Lithium Polymer battery why should we make sure to discharge the battery to 40-60% (and only then put it to storage)? What happens if you store a Lithium Polymer battery with 100%…
Ankur Agarwal
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10
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5 answers

DC-DC Boost converter in Parallel

I'm trying to power a 12V 1A device with 1 cell lipo battery. At 12W, the lipo would need to provide 3.24A (assuming no power loss) to step up the voltage to 12V and providing 1A. However the DC-DC Boost coverter (XL6009) is rated at 2A continuous…
Infrasonic
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How does a battery balance and protection circuit work?

I am building a 4S LiPo battery pack that I would like to incorporate in a portable speaker project and I need to make sure the batteries will never require maintenance beside replacing them completely in 5 years or so. The batteries I am using are…
Bogdan
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9
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6 answers

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 I look you need to use an expensive, bulky…
Elliot Chapman
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1 answer

Is this MOSFET upside down?

I'm looking at existing circuits and trying to understand them so I can design my own. Also to improve my electronics knowledge, for some reason MOSFETs have never quite sunk in for me. I came across the circuit for this board (the files from here…
ThatKeffordGuy
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How much can I overcharge a 4.35V LiPo?

I'm building a charger for a set of LiPo cells. My circuit needs to make sure they get fully charged to their maximum level of 4.35V. At the same time, the circuit should protect the cells from overcharge. The charging stops when the 4.35V level is…
K.Mulier
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Why do drones use Li-Po instead of Li-Ion?

According to every source I've found the only advantage of Li-Po is their shape, but they are more expensive, have lower energy density and are more dangerous compared to Li-Ion. Why do drones use Li-Po batteries instead of Li-Ion batteries for…
Vasil Kalchev
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9
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2 answers

"Breaking-in" lithium polymer batteries:Is there any research on that?

Well I just got new batteries for my RC glider and I'm thinking about what to do with its battery. For those who aren't in the RC hobby the story goes something like this: New kid buys a battery and hears that some people recommend breaking in the…
AndrejaKo
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