<html><head></head><body style="zoom: 0%;"><div dir="auto">George maybe you could fix your bike battery with the 82650s.<br><br></div>
<div dir="auto"><!-- tmjah_g_1299s -->Deid<!-- tmjah_g_1299e --><br></div>
<div dir="auto"><!-- tmjah_g_1299s -->va7rei<!-- tmjah_g_1299e --></div>
<div class="gmail_quote" >On Dec. 30, 2021, at 10:57 a.m., George Bowden <<a href="mailto:gtbowdeng@gmail.com" target="_blank">gtbowdeng@gmail.com</a>> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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Thanks for the link
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I've been learning lots about li-ion 82650 batteries last week.
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I bought an e-bike (the same model as the one I ride) that london drugs was selling for parts because of a dead 36v battery, for $400 . The manufacturer went out of business, and I can't find that slim battery pack anywhere online.
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I determined it wasn't the charger by swapping chargers with my current bike.
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So I charged the ten cell packs individually to about 2.5 volts, from zero volts. There was about a half volt difference between cells depending which one I charged last. Then I plugged in the charger, which began charging fine but I noticed that some cells got hot. I let them cool, and put a thermistor in the battery case that shut off the charger at a temp of 40c. A half hour later the battery case was quite warm to the touch, and the thermistor was reading 49c. Damn... too hot. And the cells were even hotter.
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One bank of cells is the culprit, I think.
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I don't know if the battery manager is bad.. I'm about to buy a new Daly or Qucc model. I can't find one that will fit the battery case though. Here is a
<a href="https://youtu.be/NwYkuVcp120">good video on BMS </a> investigation
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By the way, there are several BMS's for around 12 volts, and one for 48 volts in the estate stuff. And a bunch of 82650 cells. Anyone interested in biking through the snow to get them?
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On Thu, Dec 30, 2021 at 8:06 AM Deid Reimer <
<a href="mailto:deid@drsol.com" target="_blank">deid@drsol.com</a>> wrote:
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Where would my hat be without them?
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Thanks Craig.
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Deid
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va7rei
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On Dec. 30, 2021, at 8:00 a.m., Craig Miller <
<a href="mailto:cvmiller@gmail.com" target="_blank">cvmiller@gmail.com</a>> wrote:
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Many of us use LiPo batteries (or LiFePo), I thought this article was kind of interesting on how they are built, and why some are round and others flat.
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<a href="https://www.allaboutcircuits.com/news/three-major-lithium-ion-battery-form-factors-cylindrical-prismatic-pouch/" target="_blank">https://www.allaboutcircuits.com/news/three-major-lithium-ion-battery-form-factors-cylindrical-prismatic-pouch/</a>
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cheers,
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Craig...
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IPv6 is the future!
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<a href="http://ipv6hawaii.org/" target="_blank">http://ipv6hawaii.org/</a>
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George Bowden 250-893-7423
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Victoria BC
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<pre class="blue">-- <br>Projects mailing list<br>Projects@vicpimakers.ca<br><a href="http://vicpimakers.ca/mailman/listinfo/projects_vicpimakers.ca">http://vicpimakers.ca/mailman/listinfo/projects_vicpimakers.ca</a><br></pre></blockquote></div></body></html>