Author Topic: Advice needed for DIY spot welding of 18650 cells  (Read 498 times)

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Offline emece67Topic starter

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Advice needed for DIY spot welding of 18650 cells
« on: January 20, 2022, 11:49:37 pm »
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« Last Edit: August 19, 2022, 05:10:22 pm by emece67 »
 

Offline abdulbadii

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Re: Advice needed for DIY spot welding of 18650 cells
« Reply #1 on: January 21, 2022, 12:17:11 am »
Have a work inspecting, reviewing the pack situation is worth it

meant if there's possibility an extra space in all dimension
we'd try transform it to 'normal way' ie. replace them with the bumped (+) pole ones, give them the on-market-available houses and charging them with their special quality charger
by this all drawbacks of resistance-welded pack get avoided, mainly dissimilarity temperature surrounding batteries
the ones in the inner position always get hotter hence degraded more quickly .
temperatures above 60°C gives Li-ion battery loses capacity linearly, in turn its performance
it's must be within 10°C to +55°C.temperature range, but when charging take place must be ~ +5° - +41°C.

preventing from going down to nominal V is not hard to do manually as the using tool performance should be a telltale
whenever it shows noticeable down performance quickly pull out and put into charger one by one,
could google better than me ones:
https://charger.nitecore.com/product/ums4

IMHO this'd give the Li-ion battery far longer lifetime as they get rolled over position and evened in high temp. impact

might benefit read
https://www.plarad.de/fileadmin/downloads/FAQ_related%20to%20lithium%20ion%20rechargeable%20battery%20care_DA1_en_0216.pdf
« Last Edit: January 22, 2022, 05:38:43 am by abdulbadii »
 
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Offline emece67Topic starter

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Re: Advice needed for DIY spot welding of 18650 cells
« Reply #2 on: January 21, 2022, 11:15:44 pm »
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« Last Edit: August 19, 2022, 05:10:30 pm by emece67 »
 


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