My conversion to lithium 18650 VX1

13 replies [Last post]
Vicens
Offline
Joined: 07/30/2016
Points: 54

Some details.

Make a conversion mikel to lithium.

Leaf cells are difficult to obtain.

I have a battery of a small scooter that want to recycle.

use a total of 784 cells 18650.

Samsung inr18650-29E cells with less than 50 cycles.

Sanyo ncr18650GA cells new.

9.54 kwh total capacity. at 25 ° C. at 100% charging, to 0% discharging, constant 1C discharge. Not take advantage of the full capacity. for longer life. The capacity will be less.

Make two or more packages. 36 cells in series.

Use bms of vectrixparts.

Cells without fuse assembly.

other details later.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
Vicens
Offline
Joined: 07/30/2016
Points: 54
Re: My conversion to lithium 18650 VX1

Joining the first cells with glue. Make the first parallels of 22 cells.


MEroller
MEroller's picture
Offline
Joined: 09/26/2011
Points: 826
Re: My conversion to lithium 18650 VX1

Interesting idea for joining such cells :-) However, if that is hot-melt glue, it may melt during heavy use also as battery cells do warm up at high discharge or charge currents. But then again, if cells get THAT hot it would be highly worrysome and rather shorten their longevity...

__________________

My rides:
QvR vR one: a Swiss package of pure understatement - innocent and to some eyes (from some angles) exceedingly ugly looks, but with raw and hardly containable electron power up to real 95 to 100km/h! And a literally rock-hard suspension due to a carrying capacity of twice it's unladen weight... Now converted to more controllable and efficient brushless motor and vector-contoller.

E-Sprit Fury (basis is the Erider Thunder 5000) since May 03, 2011. Highly moded - but now in active retirement

Vicens
Offline
Joined: 07/30/2016
Points: 54
Re: My conversion to lithium 18650 VX1

MEroller wrote:

Interesting idea for joining such cells :-) However, if that is hot-melt glue, it may melt during heavy use also as battery cells do warm up at high discharge or charge currents. But then again, if cells get THAT hot it would be highly worrysome and rather shorten their longevity...

The cells can be heated a few degrees. high current charging or discharging.

However. BMS or controller cut the current, if you have a temperature sensor and is properly configured.

Hot melt glue is used in many batteries bicycles. No problem.

Vicens
Offline
Joined: 07/30/2016
Points: 54
Re: My conversion to lithium 18650 VX1

Make the battery only with NCR18650GA cells. In a 38S22P configuration.

That's how it is in a box of batteries lifep4:


It should be 10S22P configuration at each height.

Fit 4 heights. for 40S22P settings. plenty more space above. space that could fit the bms.

Needless half the space of the battery. It would be possible to mount another charger in free space.

Vortex
Offline
Joined: 10/18/2015
Points: 78
Re: My conversion to lithium 18650 VX1

Nice Job..

What is the maximum value to the cells? 4.10V?

Vicens
Offline
Joined: 07/30/2016
Points: 54
Re: My conversion to lithium 18650 VX1

Vortex wrote:

Nice Job..

What is the maximum value to the cells? 4.10V?

The maximum values of the cells sanyo NCR18650GA are:

4.2v charging , 2.5v discharging.

Vicens
Offline
Joined: 07/30/2016
Points: 54
Re: My conversion to lithium 18650 VX1

Vortex wrote:

Nice Job..

What is the maximum value to the cells? 4.10V?

The maximum values of the cells sanyo NCR18650GA are:

4.2v charging , 2.5v discharging.

Vortex
Offline
Joined: 10/18/2015
Points: 78
Re: My conversion to lithium 18650 VX1

Vicens wrote:
Vortex wrote:

Nice Job..

What is the maximum value to the cells? 4.10V?

The maximum values of the cells sanyo NCR18650GA are:

4.2v charging , 2.5v discharging.

Yes, but i asked for the maximum secure value that you put in the bms, 4.14V?

Vicens
Offline
Joined: 07/30/2016
Points: 54
Re: My conversion to lithium 18650 VX1

Vortex wrote:
Vicens wrote:
Vortex wrote:

Nice Job..

What is the maximum value to the cells? 4.10V?

The maximum values of the cells sanyo NCR18650GA are:

4.2v charging , 2.5v discharging.

Yes, but i asked for the maximum secure value that you put in the bms, 4.14V?

Bms ask for the value of charging balanced and discharging. No fit possible. The bms come in charging voltage 4.15V.

If you charge to 3.9V and 3.2V discharge. Get longer life. the capacity is 50%. This is useful if you have to make small trips. Different chemical operating at different voltages.

Vicens
Offline
Joined: 07/30/2016
Points: 54
Re: My conversion to lithium 18650 VX1

Finish attaching the cells in hotmelt, blokes 11p.

Complete the first weld.

I have received different batch cells with different voltage, 3.65V and each other to 3.5V.

I made a test capacity of 4 cells, and all are in a similar capacity. of 3300-3400 mah. 4.21V charge and 2.85V discharge.

R
R's picture
Offline
Joined: 06/18/2009
Points: 1725
Re: My conversion to lithium 18650 VX1

Can't wait to watch these entire bunch of 18650 inside your vectrix!
You'll use vectrix BMS, won't you?

Vicens
Offline
Joined: 07/30/2016
Points: 54
Re: My conversion to lithium 18650 VX1

I continue with the creation of the battery.

I had a problem with nikel strips. So far I have not been able to segir.

I am uniting the cells with hot glue.

Vicens
Offline
Joined: 07/30/2016
Points: 54
Re: My conversion to lithium 18650 VX1

R wrote:

Can't wait to watch these entire bunch of 18650 inside your vectrix!
You'll use vectrix BMS, won't you?

I use a vectrixpart bms.

I think the best option.

The bms communicates with the charger and motor controller. if there is any problem. The battery disconnects the charger or the motor controller.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

style="display:block"
data-ad-client="ca-pub-2401070691062219"
data-ad-slot="2079401426"
data-ad-format="auto">



Who's new

  • LiFePO4 Battery
  • teemumeena
  • carlos1984
  • Francie Cowles
  • evt4000_94566

Customize This