01-09-2019, 10:00 PM | #21 | |
RCC Addict Join Date: Jun 2017 Location: Canada
Posts: 1,742
| Re: LIPO Capacities Quote:
My last batch of zippy compact 2s are sitting at 6mohm! Yours are really high. Sent from my Pixel 2 XL using Tapatalk | |
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01-10-2019, 03:44 PM | #22 |
Rock Stacker Join Date: Mar 2016 Location: Santa Rosa
Posts: 99
| Re: LIPO Capacities
Good information regarding your questions regarding lipo batteries. Electric RC info, how-tos and such - TJinTech |
01-11-2019, 08:40 PM | #23 |
Rock Crawler Join Date: May 2016 Location: SoWIs
Posts: 618
| Re: LIPO Capacities
Full discharges down to 3.2v are NOT a good idea with lipo's, it puts a lot of stress/wear on the cells. Wear is essentially seen as internal resistance. Lipos "wear" in a few different ways. The first is how many full discharges it sees. One thing to consider is two 50% discharges isn't the same as one 100% discharge. The later puts twice the wear into the cell. Same for full charge voltage, charging to just 4.1v puts much less wear than 4.2v. You'll also cause wear by leaving it above 4v for more than 24hrs. The last thing that wears a lipo is high-rate discharging. In most cases you won't come close to that with a crawler, but even a 3650 brushless basher will see spikes over 100A. I beat the snot out of my boat batteries with constant currents over 120A, but never run them hard below 3.5v. Resting voltage is around 3.7v when I stop. Never fully charged for more than a day, always charged between 10-20 amps. After 2 years they're barely passing 3mOhms. Most people mistakenly treat motors as purely resistive loads. Ohm's law doesn't work when you apply it wrong. |
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