Tested 18650 cells from Ebike

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EnergyCells BV

EnergyCells BV

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Hello guys,

Our store is back online with tested 18650 cells.
Check out our store:https://www.ebay.nl/str/grooter

Boxes with 100 cells each, brand mostly: Samsung, Sanyo, LG, Panasonic

1000-3000mAh range. Maximum range a box 200mAh, so 1000-1199 1200-1399 and so on.

See picture of our testing station

image_hxbbxr.jpg







With kind regards,

Tim de Groot
 
Wow that's a lot of losses due to the power adapters. Why not run 2 or 3 bigger current 12V supplies to run the opus's? I only have 3 and rum them off a 250W 12V source. I also power additional 12V fans that run all the time to cool the opus from the back
 
I was thinking the same thing, jdeaman. :huh:
Lots of wasted power in wall warts

He could make more profit by going the route jdeadman mentions as his utility power would be lower :idea:
 
jdeadman said:
Wow that's a lot of losses due to the power adapters. Why not run 2 or 3 bigger current 12V supplies to run the opus's? I only have 3 and rum them off a 250W 12V source. I also power additional 12V fans that run all the time to cool the opus from the back
Click to expand...
Hey,

Are there any sort of youtube movies who explain how to do that? We are running them on solar power now.
 
If you are on solar I would just get a Buck converter to take your pack voltage and drop it to a nominal 12 V. What is your battery voltage at?

Also inverting DC to AC you incur losses of power and also from AC to DC you incur losses. so your getting a double Loss of power.

Once I know your DC voltage I'll recommend a Buck converter


The actual task of wiring up one is really simple but I don;t know if there is a video out there. But I can throw one up if needed as I did my opus's recently

For Example this is a 40A 48V to 12V buck converter https://www.alibaba.com/product-det...pm=a2700.7724857.normalList.26.64f374f6kY5gfS

This will output 40A @ 12V and an opus that can draw max 1.4A @12v (4A @ 4.2V = 16.8Watts) so you can power 28 or so Opus's with this unit.

Now that would mean every opus would be drawing max current at the same time which in my case I have never been able to do. Even putting the batteries in dead at as fast as possible my max draw from 3 opus was 2.7A
 
As far as hooking the buck converters up to the Chargers, I would just snip the power cable from the wall warts and then splice into those. You could actually do it fairly easily with the splices by using the lever lock splice connectors. Will post a link later as I'm not home at the moment
 
Ok, now I'm home.

The connectors I'm thinking of are these: https://ebay.to/2y7FCUD

image_lattnv.jpg


They apply force when clamping down on the wires, so no need to solder. And you can attach multiple pigtails to one connector.
 
jdeadman said:
If you are on solar I would just get a Buck converter to take your pack voltage and drop it to a nominal 12 V. What is your battery voltage at?

Also inverting DC to AC you incur losses of power and also from AC to DC you incur losses. so your getting a double Loss of power.

Once I know your DC voltage I'll recommend a Buck converter


The actual task of wiring up one is really simple but I don;t know if there is a video out there. But I can throw one up if needed as I did my opus's recently

For Example this is a 40A 48V to 12V buck converter https://www.alibaba.com/product-det...pm=a2700.7724857.normalList.26.64f374f6kY5gfS

This will output 40A @ 12V and an opus that can draw max 1.4A @12v (4A @ 4.2V = 16.8Watts) so you can power 28 or so Opus's with this unit.

Now that would mean every opus would be drawing max current at the same time which in my case I have never been able to do. Even putting the batteries in dead at as fast as possible my max draw from 3 opus was 2.7A


Thnx for the info, if you can drop something from your setup that would be great! Thanks!
Click to expand...
 
Sure as soon as I get a chance I'll do that. I'm heling my brother move right now then last weekend at camp. next week I should have time near my batteries.
 
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