<div dir="ltr">Thanks for the link<div>I've been learning lots about li-ion 82650 batteries last week.<div>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.</div><div>I determined it wasn't the charger by swapping chargers with my current bike.</div><div>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.</div><div>One bank of cells is the culprit, I think. </div><div>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</div><div><br></div><div>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?</div><div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Dec 30, 2021 at 8:06 AM Deid Reimer <<a href="mailto:deid@drsol.com" target="_blank">deid@drsol.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="zoom:0%"><div dir="auto">Where would my hat be without them? <br><br></div>
<div dir="auto">Thanks Craig. <br><br></div>
<div dir="auto">Deid<br></div>
<div dir="auto">va7rei</div>
<div class="gmail_quote">On Dec. 30, 2021, at 8:00 a.m., Craig Miller <<a href="mailto:cvmiller@gmail.com" target="_blank">cvmiller@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">
<div dir="ltr">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.<div><br><div><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></div><div><br></div><div>cheers,</div><div><br></div><div>Craig...<br clear="all"><div><div dir="ltr"><div dir="ltr"><div>-- </div><div>IPv6 is the future!</div><div><a href="http://ipv6hawaii.org/" target="_blank">http://ipv6hawaii.org/</a><br></div></div></div></div></div></div></div>
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