my new build everything ive bought so far

General Discussion about electric bicycles.
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mr42ndstblvd   10 mW

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Joined: Apr 09 2014 5:04pm

my new build everything ive bought so far

Post by mr42ndstblvd » Feb 09 2016 10:34pm

4 x 8000mah 30c 6s lipo floureone
2x imaxb6 chargers
2x power supplys for imaxb6
1 motor kit 48 volt 1000 watt
2x xt90 parelle cables
2x xt90 series cables
gunna buy a bike at walmart soon

if you have any tips or things ive missed let me know

my plan is to use 2 imaxb6's to charge 2 batteries at a time a little time consuming but simple enough for me for a first lipo build
basically im doing a standard 48 volt 4 brick pack but at 16 ah
Attachments
4x lipo 6s.jpg
4x lipo 6s.jpg (81.01 KiB) Viewed 336 times
imax b6.jpg
imax b6.jpg (121.11 KiB) Viewed 336 times
xt90 par.jpg
xt90 par.jpg (82.85 KiB) Viewed 767 times
s-l1600.jpg
s-l1600.jpg (207.5 KiB) Viewed 270 times
motor kit.jpg
power supply for imax b6.jpg
power supply for imax b6.jpg (66.04 KiB) Viewed 767 times

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motomech   1 GW

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Re: my new build everything ive bought so far

Post by motomech » Feb 10 2016 6:31am

lipo build
basically im doing a standard 48 volt 4 brick pack but at 16 ah
First off, 12S of Lipo does not make a "standard" 48 V pack, which has a top charge of 54.4V
12S of Lipo will have a top charge very close to 50V.
The reason I mention this is this;
The Key to a worry-free Lipo powered Ebike is a hard and fast Low Voltage Cutoff, which in the case of 12S is 42V.
You need to check and make sure the kit controller has this.

Your plan for charging leaves much to be desired.
The thing to avoid is dis-connecting("breaking")and connecting the pack, especially with Xt90 connectors, which I have found to be hard to work with.
Not only would this be laborious, it invites mistakes.
Eventually, on some late nite, when you are tired, you will make a mistake and with 8000 mAh/30C behind it, there will be a Hell of a spark.
The advantage of 12S/2P Lipo packs is there are bulk chargers that will work and you can get by without a BMS(3P requires a BMS, I.M.O.) and you need to take advantage of these two facts.
The best bulk charger for 12S is the Meanwell HLG-320-48A or HLG-320-54A;

http://www.trcelectronics.com/View/Mean ... -54A.shtml

These are not cheap, but they do not require an AC to DC power supply(They are a AC to DC PS!, but with CC and CV), are extreemly durable, are dead silent and fast charging.
You will need to install a $5 mini Volt meter(Or better, something like a Watts Up), with which the top charge Voltage is set and once the pack is plugged in, will monitor the charge process(batt. Voltage).
And unlike a balance charger, which continualy goes thru "cycling" up and down as it reads the cell voltages, this LED PS, starts charging instantly and will maintain whatever charging current you want. That's up to 6.5 A X 50 V = 315 Watts.
Expect a fully dis-charged(which you shouldn't do when it can be helped)12S pack of 16 Ah to fully charge in less than 1 1/2 hr.s, as opposed to all night using a pair of Tinker Toy 50 W chargers.

For the cell monitoring and balancing, use 4 of theses;

http://www.hobbyking.com/hobbyking/stor ... ry%20medic

Spend the money now to work with your Lipo and your life will be much easier. And when one considers, this power supply will out-last the Ebike and no AC PS is needed, I believe this combo is the best value for safe Lipo charging over the long run.
100_0016.JPG
100_0016.JPG (94.07 KiB) Viewed 759 times
Charging simple 12S/1P to show components.
100_0018.JPG
100_0018.JPG (60.85 KiB) Viewed 755 times
Charging 12S/2P pack in bike.
Last edited by motomech on Apr 29 2016 7:01pm, edited 1 time in total.
Motomech

'03 Rocky Mountain Edge 2WD 260 Q100H frt and Ezee V1 rear 2 Elifebike 20A & 25A 9-FET controllers 12S/10Ah Multistar Lipo rear 4Ah Turnigy frt Luna Cyclops Extra lite Alex 24DM rims, Crazy Bobs run ghetto tubeless. 25 mph. Mean Well HLG-320H-54A
https://endless-sphere.com/forums/viewt ... =3&t=83430
'07 GT Idive 4 4.0, Q100C 201 14S LiPoly elifebike 9-FET 20A controller. 23 MPH.
https://endless-sphere.com/forums/viewt ... 4#p1378484

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wesnewell   100 GW

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Re: my new build everything ive bought so far

Post by wesnewell » Feb 10 2016 2:06pm

XT90 connectors have female 4.5mm bullet connectors for both positive and negative side. This makes putting them in series real easy using male to male 4mm banana plugs, for a 12s2p pack, you only need 2 of them, but since you've already bought 2 parallel xt90's you will only need one to put the packs in series. But I understand on how you plan to do it, and that will work fine too. The only other thing I'd suggest is that you parallel the packs at cell level. For this you need 2 of these, one for each 6s paralleled packs, which you can leave in place all the time. It will insure the paralleled packs always stay in balance at the cell level.
http://www.hobbyking.com/hobbyking/stor ... arch=2xjst
When you charge you'll need to remove the xt90 serial adapter each time with how you plan to charge, but that's not something you're likely to forget since otherwise you'll only have one connector to plug 2 charges into. You realize it will take over 4 hours to charge your pack using the two 50A chargers. I would have probably chose a different charging setup, but what you plan on will work fine.
Last edited by wesnewell on Feb 11 2016 3:32am, edited 1 time in total.
Need Advice? https://endless-sphere.com/forums/viewt ... =3&t=66302
Mongoose 26" Ledge 2.1 mtb bike $99, yescomusa.com 48V 1000W rear hub kit $200, Hua Tong 72V 40A controller $35, 10ah 24s lipo $217=~43mph, range=45 miles @ 20mph. 25K miles and still going strong.
Huffy Fortress 3.0 with MXUS 3000 4T motor, 24s lipo, 96V 60A controller. Total cost with extras <$700. Top speed ~50mph
My videos https://www.youtube.com/channel/UC0KW4U ... _G2wQhptMg

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Joppo   100 W

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Joined: May 25 2013 5:43am
Location: Norway

Re: my new build everything ive bought so far

Post by Joppo » Feb 10 2016 2:54pm

wesnewell wrote:XT90 connectors have female 4mm bullet connectors for both positive and negative side. This makes putting them in series real easy using male to male 4mm banana plugs, for a 12s2p pack, you only need 2 of them, but since you've already bought 2 parallel xt90's you will only need one to put the packs in series. But I understand on how you plan to do it, and that will work fine too. The only other thing I'd suggest is that you parallel the packs at cell level. For this you need 2 of these, one for each 6s paralleled packs, which you can leave in place all the time. It will insure the paralleled packs always stay in balance at the cell level.
http://www.hobbyking.com/hobbyking/stor ... arch=2xjst
When you charge you'll need to remove the xt90 serial adapter each time with how you plan to charge, but that's not something you're likely to forget since otherwise you'll only have one connector to plug 2 charges into. You realize it will take over 4 hours to charge your pack using the two 50A chargers. I would have probably chose a different charging setup, but what you plan on will work fine.
XT90 got 5mm not 4mm.

i think they are the best connectors and not so hard to work with if you use them a while
I like bikes and stuff

Mongoose pinn'r DH 48v lipo

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wesnewell   100 GW

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Re: my new build everything ive bought so far

Post by wesnewell » Feb 10 2016 5:11pm

Joppo wrote: XT90 got 5mm not 4mm.
I'm not sure what size they are but 4mm banana plugs work fine in them. They appear somewhere in between 4 and 5mm to me. Maybe 4.5mm. I can't get my calipers inside them at 5mm and I can at 4.5mm. If they are in fact 5mm, these would provide a tighter fit.
http://www.hobbyking.com/hobbyking/stor ... r_bag.html
Need Advice? https://endless-sphere.com/forums/viewt ... =3&t=66302
Mongoose 26" Ledge 2.1 mtb bike $99, yescomusa.com 48V 1000W rear hub kit $200, Hua Tong 72V 40A controller $35, 10ah 24s lipo $217=~43mph, range=45 miles @ 20mph. 25K miles and still going strong.
Huffy Fortress 3.0 with MXUS 3000 4T motor, 24s lipo, 96V 60A controller. Total cost with extras <$700. Top speed ~50mph
My videos https://www.youtube.com/channel/UC0KW4U ... _G2wQhptMg

mr42ndstblvd   10 mW

10 mW
Posts: 34
Joined: Apr 09 2014 5:04pm

Re: my new build everything ive bought so far

Post by mr42ndstblvd » Feb 10 2016 7:45pm

i appreciate the feed back on the build as for the charging setup im most likley not going to be riding it everyday if i was i would look into a bigger charger so i could charge while the pack is hooked up. or aleast to where i could charge 2 batteries in par at a time. also my budget was pretty tight so imaxb6 was the logical choice for this build i might upgrade down the road. also i dont have alot of exspirence with lipo yet so breaking down my pack to charge it will help me learn to charge safely

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Joppo   100 W

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Location: Norway

Re: my new build everything ive bought so far

Post by Joppo » Feb 11 2016 3:01am

wesnewell wrote:
Joppo wrote: XT90 got 5mm not 4mm.
I'm not sure what size they are but 4mm banana plugs work fine in them. They appear somewhere in between 4 and 5mm to me. Maybe 4.5mm. I can't get my calipers inside them at 5mm and I can at 4.5mm. If they are in fact 5mm, these would provide a tighter fit.
http://www.hobbyking.com/hobbyking/stor ... r_bag.html
your right wesnewell, they are about 4.5mm. i was out in the garrage just now and i have also used 4mm banana plug on them. always thought it was 5mm, dont know why :shock:
I like bikes and stuff

Mongoose pinn'r DH 48v lipo

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wesnewell   100 GW

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Re: my new build everything ive bought so far

Post by wesnewell » Feb 11 2016 3:29am

You thought that because that's the way most vendors advertise them. Here's one with the correct specs on them.
http://www.allerc.com/hyperion-xt90-4-5 ... 10259.html
Need Advice? https://endless-sphere.com/forums/viewt ... =3&t=66302
Mongoose 26" Ledge 2.1 mtb bike $99, yescomusa.com 48V 1000W rear hub kit $200, Hua Tong 72V 40A controller $35, 10ah 24s lipo $217=~43mph, range=45 miles @ 20mph. 25K miles and still going strong.
Huffy Fortress 3.0 with MXUS 3000 4T motor, 24s lipo, 96V 60A controller. Total cost with extras <$700. Top speed ~50mph
My videos https://www.youtube.com/channel/UC0KW4U ... _G2wQhptMg

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