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Old 01-21-09, 10:50 PM   #1
morph999 
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Need a battery bracket for 48v 20ah lifepo4

Does anyone have the 48v 20ah lifepo4 battery? I've already decided what I'm going to buy but my main concern is how to mount the battery on the bike. I've got a large mountain bike so I was thinking that it would be nice to mount the battery in the middle between the tires or hanging from the top bar. Has anyone done this or know where I can get a bracket to do that? I'm concerned about theft so I thought that would be a better idea.

Here is what I'm buying for anyone interested.

48v20ah lifepo4 battery from pingbattery -- http://pingbattery.com --- $598

and
phoenix racer 4840 (without battery) from here

http://electricrider.com/crystalyte/phoenix.htm -- $749

Thanks
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Old 01-21-09, 11:31 PM   #2
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Someone said that the lifepo4 batteries from pingbattery do not come with a connector. Is this true? If so, how will I connect it to the controller or motor? I don't have a soldering gun.
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Old 01-22-09, 07:35 AM   #3
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you can use marrets or crimp or Terminal all of witch can be picked up at any hardware store.
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Old 01-22-09, 09:13 AM   #4
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you'll have to fashion your own bracket. Just build a box, and bolt it on. make sure it is stable before you ride with it.
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Old 01-22-09, 10:19 AM   #5
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That battery is a bit wide to put inside the triangle. Ask Ping for a flatter arrangement. Go with anderson powerpoles for the connectors.
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Old 01-22-09, 10:41 AM   #6
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Go with anderson powerpoles for the connectors.
If it helps, some hobby shops that sell RC vehicles carry Anderson connectors in small quantities. My local shop uses a different name for them, but they are still easily recognized by their shape.

Powerpole connectors work best when crimped with a special crimping tool, though soldering is also popular. I can't recommend using pliers or cheap crimping tools.
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Old 01-22-09, 10:50 AM   #7
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That battery is a bit wide to put inside the triangle. Ask Ping for a flatter arrangement. Go with anderson powerpoles for the connectors.
cool, I just found out what those are. Can I get those at a local hardware store in the USA?
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Old 01-22-09, 12:08 PM   #8
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cool, I just found out what those are. Can I get those at a local hardware store in the USA?
Not likely. Try RC hobby or ham radio shops.
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Old 01-22-09, 06:51 PM   #9
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Just my 2 cents: If you go with Power Poles, and you buy the cheap $15 knock-off crimp tool, plan on buying lots of extra Power Poles, you are going to need them. Also allow plenty of time to go blow off steam after you hose the last one and have to order more.

They have a well-earned operating and design reputation but they really tested my patience during the assembly stage.
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Old 01-22-09, 08:19 PM   #10
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Just my 2 cents: If you go with Power Poles, and you buy the cheap $15 knock-off crimp tool, plan on buying lots of extra Power Poles, you are going to need them. Also allow plenty of time to go blow off steam after you hose the last one and have to order more.
Don't bother with a $15 crimping tool. Suitable tools have dies shaped precisely for the Anderson contacts. I have the West Mountain Radio version ($55), but Powerwerx.com sells an appropriate looking crimp tool for $40. Alternatively, you could spend $15 on a cheap soldering iron and a small amount of rosin core solder. I strongly recommend soldering over pliers style crimpers.

Powerwrex.com sells PowerPole contacts without housings if you mess up.
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Old 01-22-09, 09:54 PM   #11
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unime is right. I wished I'd checked in here before I got myself in trouble and taken a bunch of arrows I didn't need to.

Watch the soldering if you're new to it. Even with a nice crimp it's easy to over-solder the pin making it mostly impossible to insert it into the plastic part. I found good solder is more important than a good solder iron/gun.

Doesn't hurt to learn how to remove the pin after it's clicked into place. This comes in handy once you've put the black wire in the red plastic, not because of color blindness but because of solder-rage mentioned previously.

I'm happy with the results but putting the darn things together can be maddening.
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Old 01-23-09, 01:49 AM   #12
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I don't know what you guys are talking about. It's easy to crimp the powerpoles with linesman pliers with crimper. I haven't messed up one powerpole yet.

The power poles have a split along the center line. Crimp one side down first. Then crimp the other edge down over that one.

Here is an example. They're about $10-$15 and can be used for large gauge wire cutting too.

http://www.bicwarehouse.com/linesman...per-lm09a.html
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Old 01-23-09, 08:10 AM   #13
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snowranger, those pliers look like they would work.

If, after the crimp, you were to look at the pin from the rear, from the point of view of the wire going into it, it should look somewhat like the letter "W" where the left and right tips touch or overlap. Do the lineman pliers create the bottom "crease" ?
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Old 01-23-09, 11:10 AM   #14
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It looks like an O with overlapping edges at the top. No bottom crease is necessary if you create the overlap. The O is very tight around the wire because this tool supplies a lot of pressure.

I use the 30 amp powerpoles for everything. If the wire gauge is too small, just expose more strand and double back a few times.
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Old 01-23-09, 11:26 AM   #15
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The power poles have a split along the center line. Crimp one side down first. Then crimp the other edge down over that one.
A proper crimp evenly squeezes the contact barrel, mashing it hard against the copper strands and compressing them so no air pockets remain. The result is a strong connection, both electrically and mechanically, with lots of microscopic contact welds.

Folding the ends as you did can not properly apply pressure to all the strands of the wire being connected and generally produced inconsistent results. The usual recommendation for using pliers type crimpers is to fit the contact with the seam side down (into the concave part of the pliers), but the pliers do not have the proper shape and you can't apply enough force with that type of crimper.

Instructions for attaching wire to a Powerpole contact can be found here. Crimping with a proper tool will make the most reliable connection (and is the only technique allowed for aircraft use), though soldering is a good alternative.
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Old 01-23-09, 11:48 AM   #16
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There is nothing magical about the power pole connecters. For e-bike purposes, this is more than adequate. None of my power poles have ever slipped off, and the electrical connections have been very reliable.

Separately, I have crimped battery ring connecters to 4 gauge wires. They also use basic crimping techniques.
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Old 01-23-09, 02:15 PM   #17
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Read some of the ham radio boards and you'll see lots of people have inconsistent results using pliers style crimpers. If you want to use that technique - fine. If you want recommend it - that's up to you. I don't.
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Old 01-23-09, 02:48 PM   #18
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You just need to use some care and a good amount of pressure. Through practice, I found the overlap method very reliable.

We'll just agree to disagree.
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Old 01-23-09, 06:31 PM   #19
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Here's a link to one method that appears to yield a satisfactory result.

http://wh7da.wordpress.com/2007/12/2...le-connectors/

I'm still of the belief that any technique which requires the removal and repositioning of the crimp tool is suspect because the second crimp has the potential to undo some or all of the first crimp's work. Further repositioning turns into a Pillsbury Dough Boy game.

Then again, we are talking eBikes, not 747s.
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Old 01-23-09, 10:51 PM   #20
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I found someone that will put the anderson connector on the battery for me.
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Old 01-26-09, 02:27 AM   #21
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I found someone that will put the anderson connector on the battery for me.
Search anderson connector on Ebay - trust me, you'll need several more as you consolidate all your connector to near same type or when you add other stuff. Whole thing about ebike is, you really need to become e-mechanic at some point and its better to start from beginning.

forgot - ping battery is not enough to power 53xx motor - satisfactorily.
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Old 01-26-09, 03:18 AM   #22
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Ping said his 48v 20ah would be enough for a 5303 crystalyte. I e-mailed him.
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Old 01-26-09, 09:47 AM   #23
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Search anderson connector on Ebay - trust me, you'll need several more as you consolidate all your connector to near same type or when you add other stuff. Whole thing about ebike is, you really need to become e-mechanic at some point and its better to start from beginning.
True. I added more connectors for connection of the watts up meter, for the LED lights, for power on switches, etc. Get more than you need. You'll find a use for them later.
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