EUC's with easy replaceable standard 18650 Lithium batteries

[marc]

Do somebody know if there are EUC's with EASY replaceable 18650 Lithium batteries, without welding batteries to each other, without welding resistances between battery cells, without cabling batteries to the electronic motherboard? Only changing the defective standard 18650 batteries as easy as changing a AA battery of the remote controller of a TV should be possible, no? That would be revolutionary in the EUC market. Because now when the batteries are nearly dead (capacity decreases after hundreds of charge discharge cycles) instead of changing only the dead batteries (= maybe the half or 1/3 of the batteries) (=20 dead batteries *10euro=200euro), we have to throw the EUC of 2500 $ to the trash even if the rest of the EUC is working. And even if the rest of the battery pack is working, you have to throw your EUC to the trash because of few dead battery cells. That is a pity. Isn't there an easy way to change the batteries?

Or are the companies thinking of producing a such EUC. You do not throw your car when the oil tank of your car is leaking. You only change your tank and you continue using the car. I think companies push us to spend more money to our EUC's by not supporting the after service for batteries. And since the EUC repair shops do not exist yet...

[johrhoj]

I have a NinebotOne E+. After approx. 300 full charges, I think I am beginning to notice a diminished range but I an not even sure about it. Warmer weather is to come and I should check my tire pressure again.

If my batteries became really old, or damaged, I can simply buy a battery replacement set. Replacing it is very simple (just a few screws and clicks) and everyone can do it. There are even vids on youtube showing how.

Aren't battery replacement sets available for all (reputable) EUC's?

[vladmarks]

49 minutes ago, johrhoj said:

Aren't battery replacement sets available for all (reputable) EUC's?

I think @marc means replacing battery cells on their own. 

1 hour ago, marc said:

Or are the companies thinking of producing a such EUC

I am no expert on battery composition or overall power management topic, but wouldn't it make the system more problematic to manage and maintain if there were individual replaceable battery cells in each? 

Battery blocks are plainly the easiest solution: most of the reputable brands work with battery management system tech, which maintains the cell charge on a relatively same level, not letting a single cell's charge plummet unproportionally. All things considered, sets like that cost anywhere between 100-450 usd, which is fairly acceptable.

[esaj]

Don't know about US, but you can replace the entire pack with a new one once it goes bad, no need to trash the whole wheel. In Europe, at least 1RadWerkstatt builds custom-packs with high quality cells:  http://www.1radwerkstatt.de/   There are probably others, plus I'd think many wheel-resellers could at least supply replacements for the originals.

As for replacing the cells without any spot-welding or such, there are "holders" for 18650-cells like this:

but the problem with those is probably that the tabs that press on the cells cause too much resistance at the connecting points, and they would overheat & melt the holder with the amount of current the wheels use. I built a small flashlight using such, but the wires are far too thin to draw much current (200mA max here):

 

[Slaughthammer]

16 hours ago, esaj said:

but the problem with those is probably that the tabs that press on the cells cause too much resistance at the connecting points, and they would overheat & melt the holder with the amount of current the wheels use.

That is exactly what I think on this matter. Additionally I think any kind of clip cell holder will mechanically too weak to guarantee a safe an continuous electrical supply to the controler under all the rattle and bumps an EUC is exposed to during operation. Just think of cobblestone... Welding or soldering the cells together is in my oppinion the only safe way to assemble a battery pack for an EUC.

Another point would be that it's bad practice to combine older and newer cells in one pack, as they will differ in capacity and internal resistance. So it's anyways better to change the whole pack instead of some single cells.