I don’t plan on using mine in the winter and would like to see a storage option that maintains the battery at 50%. This is where Li-ion batteries like to live.
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Yarbo’s recommendation can be found here
I like the idea of a simple switch in the software to “just handle it please”.
After all shouldn’t the battery management system be doing that?
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There is a pretty good discussion of the chemistry and the desired charge SOC, especially when the battery is idle.
Battery charge limit
IF you click on the heart, that will help elevate some of the problems we are having with the SOC setting limitations currently used on the Yarbo battery and maybe solve your question too…
Tim
I definitely agree this is needed, and when I know I’m not using Yarbo for a week or more I will let it discharge below 60 then shut down and pull the battery. But I certainly wish I could tell it to never charge over 90. The poor thing sits at 100 most of its life.
The 100% SOC represents 100% of the Battery Management Systems managed and optimal SOC. It is not true 100%, but a managed one. I agree that it would be nice to periodically tell it to go all the way. I definitely needed this the few times I needed to use my snow blower. A full 100% and not the managed one would have allowed me to get my entire driveway done in one charge. Sometimes I could because the BMS was varying the SOC - but it always said 100%.
I’ve measured the pack and computed the cell voltage (see math in above link) and at 100% the cells are sitting at 4.20VDC, which is 100% period, that is not a “managed” 100%, that is a fully charged cell. We have asked for lower settings, you can still do a BMS balance at 90% or less for that matter. I’m another user with only mower, in the Pacific Northwest, we don’t have much snow to blow! I mow acreage but I’d rather manage the battery for long life than long run time.
Tim
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Thank you for your suggestion. As Ken mentioned, we recommend regularly charging the battery pack when it’s not in use to help maintain its health. I’ll also share your idea with our product team so they can evaluate whether it offers a better approach to battery maintenance and assess its feasibility.
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