Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[JoelR]

Here's a pic of the pack with its BMS, 60 amp, waterproof, 3-wire (separate charge and discharge ports).  I'm in line to get a kWeld battery spot welder next week when they get more in stock in the US. https://www.keenlab.de/index.php/portfolio-item/kweld/

[MDW195]

impressive start...

[MDW195]

My bad. I though that I answered some of JoelR's questions...maybe I failed to hit submit?
Anyway, the cluster of wires is the wiring loom as it came on the bike when I got it. The controller has no mount, so I have it secured to the velcro used to tied down the battery.
I did add some XT60 connectors, as well as spliced in a jack connector for the satiator, onto the same mount that came with the bike.

I did not have to do anything to the trays on the bike. It all fit fine.
I will try to take some better pictures and post them to clear things up a bit regarding the mess of wires, and maybe I will get motivated for some spring cleaning...but I am still considering many ideas...for instance, I would like to lose the Kuberg throttle, but need to do some homework to see if a Domino or other electric throttle will work...
I am worried that the controller could go bad sometime in the future, and like I said before, just to replace the throttle in order to get the indicators to work will cost about $500 as I will need a new wiring harness, throttle and controller. So far, piecemealing the battery has been the best mod yet. Then I drilled new mounting holes for the lower shock to level out the bike, and that has helped as well.

I hate the chain on the bike, it is so small, and already shows signs of age. But I do not typically replace chains without also changing out sprockets, and the rear sprocket looks integrated into the rear wheel (though I have not pulled it to confirm)...

[JoelR]

Thanks @MDW195 for the reply

I don't know all the benefits but I did have a good conversation with Marllon @ Kuberg Florida https://kubergflorida.com/ about upgrading the controller and all wiring to the latest version.  In my recollection, it wasn't that expensive (less than $300 I thought).  He's a great resource and handles most US tech inquiries.  It's possible the Kuberg throttle isn't specially made, looks like an e-Bike part to me.

I'm really surprised that your pack fits right between the rails.  Mine are too close to fit an 18650 battery sideways so a whole pack would require the rails to be cut/ground to make room.

[acacia1731]

Here's a USA-based distributor for the Mototec 10Ah Lithium Battery (and a few other parts) that may fit the Kuberg.

https://bigtoysusa.com/mototec36vprodirtbikeparts.aspx

[JoelR]

I got the 20.7 Ah capacity, 60A continuous discharge battery done and my daughter is riding it as I type this!  So far, so good.  It works, isn't getting hot, has tons of power and really improves how the bike rides compared to the tired lead acid batteries it replaced.  Pics later.

[acacia1731]

Couple more options < $300 on ebay, which have plenty of current (50A / 100A max) and include a 5A charger:

https://www.ebay.com/itm/36V-20Ah-Li-ion-Lithium-Battery-Pack-For-Electric-Bike-With-5A-Charger-50A-BMS/163711527429?hash=item261df7aa05:g:Mt4AAOSwNQNc5jmV
Would fit vertically, spanning top and bottom compartments after removing a small amount of material from the battery support channels.

https://www.ebay.com/itm/36V-20Ah-LiFePO4-Lithium-Rechargable-Battery-For-500W-Ebike-Scooter-5A-Charger/162323380088?hash=item25cb3a3778:g:xmYAAOSww8ldPqfC
Would fit in top compartment, coming very close to the controller.

[JoelR]

https://www.ebay.com/itm/36V-20Ah-Li-ion-Lithium-Battery-Pack-For-Electric-Bike-With-5A-Charger-50A-BMS/163711527429?hash=item261df7aa05:g:Mt4AAOSwNQNc5jmV
Would fit vertically, spanning top and bottom compartments after removing a small amount of material from the battery support channels.

This is definitely interesting.  It appears to be based on pouch-type cells vs. 18650 cells.  I know very little about these.  The weight is surprisingly heavy at 13.2lbs (my custom 20Ah 18650-based battery is around 6lbs (I''ll measure it exactly one of these days).  Still, 13.2 lbs for 20Ah is less than half the stock SLA weight and ride time is probably triple.

https://www.ebay.com/itm/36V-20Ah-LiFePO4-Lithium-Rechargable-Battery-For-500W-Ebike-Scooter-5A-Charger/162323380088?hash=item25cb3a3778:g:xmYAAOSww8ldPqfC
Would fit in top compartment, coming very close to the controller.

This one I'm less excited about but still intrigued.  At 17.2lbs, it's pretty heavy for a lithium battery but being LiFePO4, my understanding is it will last a long time and has a safer chemistry than LiPo.  I converted 2 of our Razor Ground Force Drifter karts to use 24v LiFePO4 batteries I bought used on eBay and they've been absolutely great.  The run time is plenty long to overheat the motor so I have to remind the kids to give their karts a break. :-)

[acacia1731]

Finally received and installed this 30.6Ah battery:
https://booant.com/products/booant-36v-electric-bike-battery-10s-30ah-1500w-lg-lithium-ion-battery-pack-18650-with-5a-charger-1?fbclid=IwAR0DLdMHkNfI8CoPVlinTAc7-HwcevgyXjz-kjDdpOmE5M9D4Z3MydKpn9Q

I put the battery into this bag, for waterproofing, fire mitigation, and some padding protection.
https://www.amazon.com/gp/product/B083S75JGY/

The width was line-to-line with the frame rails, so I had to remove 1/16 inch from each rail.  I also used a 1 inch block to hold the battery above the lower compartment brackets and some closed-cell foam to protect the lower front corner.  I used the stock velcro straps to secure everything in place.

It came with an XC90 connector for the power output.  For now, I'm using another small adapter to convert the spade connectors on the controller to the XC90 connector on the battery.

It came with an XC60 connector for the charger input, and I was able to use the same body panel opening to hook up the charge cable.

Everything seemed to work well on a first ride around the yard.  It pulled me (170lbs) up a decent slope with full throttle on level 3 with no problems.

[MDW195]

Very nice. Thanks for updating.
That looks like the Kuberg Start...judging by the front wheel looks smallish.
But you got the right battery in there. You should see serious range with that setup, plus you wont have the issues with the BMS shutting down like me.

Way to go.
-MW

[steven]

Hi,

This is a very nice setup with the LG batteries! I've 2 kids one, with a Hero Cross and the other with a Hero Trial. So I'm interested in this setup so they kan drive longer on the circuit. Have you connected the battery to the Kuberg controller or only to the engine? So you don't charge the battery through the controller I think?

I'm looking forward in this topic its very interesting.

[acacia1731]

That looks like the Kuberg Start...judging by the front wheel looks smallish.

2016 Cross with Hero controller and rear shock (installed by previous owner).  The older models came with some really odd custom tires, which are almost square (flat across the knobs).

Have you connected the battery to the Kuberg controller or only to the engine? So you don't charge the battery through the controller I think?

The Li-ion battery has two cables - charging and discharge.  Discharge cable is plugged into the controller.  Charging cable is left hanging under the shrouds, and I plug the Li-ion charger directly into it.

[steven]

Thnx I ordered two 20Ah 1500w Batteries with Samsung 30Q Cell. Hopefully My Sons like it and get an extended Range compare to the 12ah lead acid batteries.

What’s your experience? No safety loop from the electric engine because of the amps?

[acacia1731]

Update on the Booant battery install…  This little bike did 20 miles of trails on a single charge last weekend, keeping up just fine with kids on 70 and 110cc gas bikes.  The throttle battery meter still wasn't down to the last bar when we stopped, so it could have gone farther for sure.  Towards the end my son (80lbs) did say that it was getting weaker on long uphills (100+ meters long), but I’m not sure if that was due to heat build up or battery voltage dropping.  Overall very happy so far.

https://booant.com/collections/36v-battery/products/booant-36v-electric-bike-battery-10s-30ah-1500w-lg-lithium-ion-battery-pack-18650-with-5a-charger?variant=30262153871423

Update - i think the original link is dead, but this is equivalent:  This one I believe: https://booant.com/collections/36v-battery/products/booant-36v-electric-bike-battery-10s-30ah-1500w-lg-lithium-ion-battery-pack-18650-with-5a-charger?variant=30262153871423

Update - they keep killing the links.  Will add my order detail below, in case anyone wants to search for a current equivalent.

[acacia1731]

Order details per above