Lipo charger, wiring harness, etc...

[cbr shadow]

Ok so I'm purchasing (12) Lipo batteries below:
http://www.hobbyking.com/hobbyking/store/__18631__Turnigy_5000mAh_4S1P_14_8v_20C_hardcase_pack_USA_Warehouse_.html

And this charger & power supply combo: ($240! good deal?)
http://epbuddy.com/index.php?main_page=product_info&cPath=17_20&products_id=170&zenid=f6iq68sjuvmj80hd5aprv8h6p3



Unless there's something very obvious about this setup I would rather not get suggestions on other battery types as this seems to be the best price right now and I have several lipo questions below that I'd like to get answered.

1) Please see attached jpg that I've attached. Does this look correct?
2) How will charging work on this? What do I need to connect/disconnect to charge or balance?
3) Is there anyone on the forum that is known for making custom wiring harnesses for things like this I'd rather buy from someone that make my own.
4) I noticed that on hobby king I'll sometimes get a message saying I can get a discount because I've had the window open for so long.. is there a way to get this come up before I buy these?

I'm looking to purchase right away, so any Lipo experts your help is really appreciated.

 

[Xanda2260]

Hey fella, just posted in your other thread.

There is a problem with the wiring in your diagram, it would only discharge 2 subpacks, and in parallel. So you'd get 4s 20Ah (i think).

Should look like this:

Sorry for the lame diagram, I'm on the ipad and dont have a proper pc nearby!

As for charging and harnesses, get icecube to hook you up with one of his. Awesome work, and comes with 2 harnesses. One connects to your controller, one to your charger. A third section brings all the subpack leads out to one point. Plug in the discharge harness (controller) amd you'll get 24s 10ah. When you want to charge, unplug and connect the charger harness. You then get 4s 60Ah. Charge like that.
This is exactly what I do with mine, it takes under 15s to switch from riding to charging! Awesome!

 

[cbr shadow]

Good info Xanda! I'm attaching an updated sketch (attached)

 

[cal3thousand]

Ok so I'm purchasing (12) Lipo batteries below:
http://www.hobbyking.com/hobbyking/store/__18631__Turnigy_5000mAh_4S1P_14_8v_20C_hardcase_pack_USA_Warehouse_.html

And this charger & power supply combo: ($240! good deal?)
http://epbuddy.com/index.php?main_page=product_info&cPath=17_20&products_id=170&zenid=f6iq68sjuvmj80hd5aprv8h6p3



Unless there's something very obvious about this setup I would rather not get suggestions on other battery types as this seems to be the best price right now and I have several lipo questions below that I'd like to get answered.

1) Please see attached jpg that I've attached. Does this look correct?
2) How will charging work on this? What do I need to connect/disconnect to charge or balance?
3) Is there anyone on the forum that is known for making custom wiring harnesses for things like this I'd rather buy from someone that make my own.
4) I noticed that on hobby king I'll sometimes get a message saying I can get a discount because I've had the window open for so long.. is there a way to get this come up before I buy these?

I'm looking to purchase right away, so any Lipo experts your help is really appreciated.

1) I think there is an error. In each Pannier Group you have the main leads coming off the first battery. Shouldn't the negative come from the 3rd battery to have a true series setup? ie. second and third batteries are cut out of the circuit.
2) Don't quote me on this one, but since you have it all in series at 88.8V, you'd have to charge to that voltage or break your pack apart to charge (again, don't quote me on this one. I bulk charge a 12s2p pack)
3) Icecube57 makes custom harness and methods makes protection kits for LiPo at methtek.com (that's what I'm using for my wife's bike)
4) Hang out on the item page and just wait for it.

*I'm not a LiPo expert, I'm learning like you, but I've done some reading and I'm comfortable with my own setup.

 

[mark5]

Ok so I'm purchasing (12) Lipo batteries below:
http://www.hobbyking.com/hobbyking/store/__18631__Turnigy_5000mAh_4S1P_14_8v_20C_hardcase_pack_USA_Warehouse_.html

And this charger & power supply combo: ($240! good deal?)
http://epbuddy.com/index.php?main_page=product_info&cPath=17_20&products_id=170&zenid=f6iq68sjuvmj80hd5aprv8h6p3



Unless there's something very obvious about this setup I would rather not get suggestions on other battery types as this seems to be the best price right now and I have several lipo questions below that I'd like to get answered.

1) Please see attached jpg that I've attached. Does this look correct?
2) How will charging work on this? What do I need to connect/disconnect to charge or balance?
3) Is there anyone on the forum that is known for making custom wiring harnesses for things like this I'd rather buy from someone that make my own.
4) I noticed that on hobby king I'll sometimes get a message saying I can get a discount because I've had the window open for so long.. is there a way to get this come up before I buy these?

I'm looking to purchase right away, so any Lipo experts your help is really appreciated.

icecube57 sells custom wiring harnesses and he's working on those same 4S lipo packs for his own build right now. It'd be good to see his and talk to him about making you a harness. See here:
Re: Tidal Force : 9C Revisited...
http://endless-sphere.com/forums/viewtopic.php?f=3&t=20398&start=495#p607770

 

[ddk]

Ok so I'm purchasing (12) Lipo batteries below:
http://www.hobbyking.com/hobbyking/store/__18631__Turnigy_5000mAh_4S1P_14_8v_20C_hardcase_pack_USA_Warehouse_.html

dunno about the battery charger but I just bought two of these batteries at $22.37 for my 'car' accessories. :lol:


to get the discount just stay focused on the window for a couple of minutes
(gud time for solitaire)

changed my mind- didn't buy the batteries because I prefer using rechargable AA and AAA bats for my lights and stuff...

 

[wesnewell]

Good battery choice. However your wiring is complicated. Keep it simple. For each side, stack 3 bricks wide. Split the connectors on the 2 end packs and connect the inside red of one to the black of the center pack. Now connect the inside black of the other one to the red of the center pack. That should leave you a 5ah 12s 44.4v pack. Now do another 3 packs the same way. Put one on top of the other and tape together. Parallel top to bottom using these or similar making a 44.v 10ah pack.
http://epbuddy.com/index.php?main_page=product_info&cPath=26_14&products_id=204
There's no need to parallel the main leads at all. In fact, it will just complicate things if you ever have to replace a single pack. Now do the same thing fr the other side, leaving you with 2 10ah 12s 44.4V packs.
So now on each side you have 2 open red leads and 2 open black leads. so for a 24s pack you need to connect the reds of one side to the blacks of the other side leaving 2 open reds on one side and 2 open black on the other side. Mine aren't split packs so I just plug them into each other. You will have to make or buy that crossover connection. Easy to make. Just put a 4mm plug on one end and a 4mm receptacle on the other end of 2 cables of the proper length. Now that you've done that it leaves you 2 red on one side and 2 black on the other side to connect to your controller. You'll probably have to make these cables too, or have someone make them for you.
And you definitely want a pre-charge resistor in those cables somewhere.
This is the same only not split.

 

[Xanda2260]

Good info Xanda! I'm attaching an updated sketch (attached)

Still no good mate, now you won't get any juice!

Looking at pannier 2, the negative of the right hand pair, needs to be connected to the positive of the right hand pair in pannier 1 ( see the red link on the right of my rubbish drawing? Physically, this can be done outside the panniers at the harness (which is what icecubes harnesses do)). THEN, the links between the 3 pairs in pannier 2 need flipping ( so instead of first pair Neg to second pair pos, its first pair pos to second pair neg), and the negative wire to the controller is currently connected to a positive, needs to be on the neg.

 

[dogman dan]

I didn't look at the wiring, sounds like work in progress. Nothing in particular wrong with that charger set up. Should be able to rig up something to charge two groups of paralelled packs in series at a time. To clarify, you can charge the 4s packs in 8s batches.