[VicPiMakers Projects] Interesting article on the different types of LiPo batteries

[Deid Reimer]

George maybe you could fix your bike battery with the 82650s.

⁣Deid
va7rei​

On Dec. 30, 2021, 10:57 a.m., at 10:57 a.m., George Bowden <gtbowdeng at gmail.com> wrote:
>Thanks for the link
>I've been learning lots about li-ion 82650 batteries last week.
>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.
>I determined it wasn't the charger by swapping chargers with my current
>bike.
>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.
>One bank of cells is the culprit, I think.
>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 good video on BMS  <https://youtu.be/NwYkuVcp120> investigation
>
>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?
>
>
>On Thu, Dec 30, 2021 at 8:06 AM Deid Reimer <deid at drsol.com> wrote:
>
>> Where would my hat be without them?
>>
>> Thanks Craig.
>>
>> Deid
>> va7rei
>> On Dec. 30, 2021, at 8:00 a.m., Craig Miller <cvmiller at gmail.com>
>wrote:
>>>
>>> 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.
>>>
>>>
>>>
>https://www.allaboutcircuits.com/news/three-major-lithium-ion-battery-form-factors-cylindrical-prismatic-pouch/
>>>
>>> cheers,
>>>
>>> Craig...
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>>>
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>
>
>-- 
>George Bowden  250-893-7423
>Victoria BC
>
>
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