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I found an ebike battery in my Snow Joe snowblower!!!

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I found an ebike battery in my Snow Joe snowblower!!!

Old 04-17-20, 01:56 PM
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chas58
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I found an ebike battery in my Snow Joe snowblower!!!

My Covid-19 project.

I got curious about my snowblower battery. A Snow Joe 40v6a battery. Wow, a 40v battery would give me a 10% speed increase over a 36v battery. How cool!!! I was a little skeptical about what was in it, but I opened it up and got good news and bad news.

Good news: it has some nice Samsung 30q batteries. 20 of them: 10s2p

Bad news: since when is 10 series cells rated at 3.7 volts a 40 volt battery? The entire world rates that as a 36v battery. Liars!!! Fake news!!! Still, they are decent Samsung cells with a fairly high power output (C rate).

These cells are comfortable at 13amp continuous draw (at 2p) and can easily peak at 20 amps. Not bad for a teeny tiny battery pack.


Easter surprise!
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Old 04-25-20, 03:04 PM
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Bluesfrog
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Interesting. I would say you could run into about anything when you repurpose batteries. Be Well, Bluesfrog.
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Old 04-26-20, 12:53 AM
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As I understand it, a fully charged 3.7V battery can actually measure as much as 4.1V. 36V is a 'nominal' voltage that is not quite the voltage at full discharge nor the voltage at full charge. Controllers vary in their ability to deal with non-standard nominal voltages. Also the 2P part of the situation .... that's not a lot of run-time. But tool packs are cheap. You may have heard somewhere though: "there is no free lunch"
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Old 04-28-20, 12:24 PM
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I've always wanted a light 2P pack for commuting. I'm running low current, so no real downside for me. My bike weighs 25lbs + battery, so it is really designed to go light and fast.

Its not just a repurposed tool pack. It is a high quality Samsung 30q pack. Same thing that a dedicated bike pack would be made in, but in a smaller form factor & great for commuting. Actually, this is literally the same battery as Luna Cycle's Mighty Mini Cube (30Q @ 2p), but I don't need 52v, so this one is a lot lighter and half the price.
Their pack was 14s2p 30q cells. This one is 10s2p 30q cells.

This pack isn't a heavy duty pack.
But it is great for light weight commuting that takes less than 30 minutes
Its also great to use as a range extender when my main pack gets to empty.

Yes, all 18650 batteries are rated at 3.7volts.
They have a nominal voltage of 3.6v each, and charge to ~4.2v (so a 36v pack is at 42v hot of the charger).
Industry standard is to call these (10s) packs 36 volt packs. 40v is a misnomer - really a lie.

Last edited by chas58; 04-28-20 at 12:59 PM.
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