How in the world are you attaching alligator clips to 18650s?
The clips are connected to magnets on the ends? It looks like he has them between the cells and might just have added two more.
How in the world are you attaching alligator clips to 18650s?
Exactly, bought a 100-pack of ∅8×1.5mm neodymium magnets 2½ years ago and soon they became one of my most used tools LoL. Super practical.The clips are connected to magnets on the ends? It looks like he has them between the cells and might just have added two more.
A few questions in this regard:…
The current flow eventually drops down to the leakage current rate of the cell, taking up to three days for this to happen. It then never drops below this rate. It is low but it means the cell is active 24 hours a day when being charge continuously with the electrolyte oxidizing, the SEI layer getting thicker, etc., all that time due to the continuous electrochemical activity.
…
A few questions in this regard:
Leakage current rate of the cell… could you explain a little more?
I mean, I do often leave cells charged up to just ≈3.93-3.95V to maximize their life span cos I do not plan on using them short-term. At times I've left cells stored a little below that voltage, and after weeks of storage I've barely noticed self discharge in them, and when say barely I literally mean gnat's ar$€ league.
Do you believe cell leakage current is a function of cell voltage? I mean, is leakage current noticeably higher at close to maximum cell voltage?
And well, don't worry about no cut-off in my supply. I am the cut-off LoL.
Cheers my dears
By the way, a couple weeks ago I asked HKJ to make a brief test with one of his li-ion cells to make sure cell internal resistance (dV/I) is equivalent between charge and discharge, he came up with this graph:
Pretty symmetrical, about the same resistance.
Cheers
At 3.93-3.95V seems a little high for that. The article linked below indicates below 55% SoC for NCA, below 60% SoC for NMC, and below 70% SoC for LFP is likely to yield improved calendar life if you don't plan on using the cells short-term.A few questions in this regard:
Leakage current rate of the cell… could you explain a little more?
I mean, I do often leave cells charged up to just ≈3.93-3.95V to maximize their life span cos I do not plan on using them short-term. At times I've left cells stored a little below that voltage, and after weeks of storage I've barely noticed self discharge in them, and when say barely I literally mean gnat's ar$€ league.
Do you believe cell leakage current is a function of cell voltage? I mean, is leakage current noticeably higher at close to maximum cell voltage?
And well, don't worry about no cut-off in my supply. I am the cut-off LoL.
Cheers my dears