What did Ping send me?

[grimbasement]

I just received this in the mail today... and I'm trying to decide if I received the wrong battery pack. I ordered a 48V 20 Ah battery and from what I can tell without have a DMM on me it appears I got something else. My enclosed invoice and web invoice says 48 20 Ah but looking at the pics on Pings website it really seems that this is not a 20 AH battery. I have a Yuba Mundo cargo bike so this will work out for me as I'll be able to put a pack on each side down low on the rear (in the even that Ping tells me I can keep it) after all return shipping will eat up the cost difference in the battery... Or are the 48V 20AH batteries now 2 x 48 V 10 Ah?

Measurements are 4.5 in by 7.5 in times 2.

So what say you what did Ping send me?

 

[Ypedal]

I bet is 2 x 24v packs....

DMM required for confirmation ! 8)

 

[grimbasement]

I think you are right. 2 x 24 V 20 AH packs. So what is this connector called?




Should I find a male and female of that connector and create a harnessor should I cut it off and hard wire it? Or cut it of and go with some Anderson's in a 4x2 configuration? I'll likely need 3 ft of new wire to connect the packs in the configuration I'm thinking about. What's a source for those 8 pin connectors?

I'll have to build a harness to connect the 2 packs so I can mount them on opposite sides of the Yuba down low. I'll also likely keep the spot up on the deck to mount the trusty 36 V 20 Ah v1 Ping that I was able to resurrect. Bonus might be that I can mount the packs in ammo cans if i could find a way to keep the BMS cool

 

[dogman dan]

Looks like a balance plug for 8s or 24v. Carrying a 48v 20 ah is a bit cumbersome, so looks like a 48v 20 is now a split pack. That way you can put half in each pannier.

V2.5 bms stays much cooler btw, so all it would take is a few vents in the ammo cans. Vents about the size hole you run the wires through.

 

[neptronix]

Holy crap, those things are huge.

 

[dogman dan]

Not really, but yes it's a bit bigger than a 1000 wh pile of lipo. Not that much weight difference, but about 30% more volume.

People go on and on about lipo being lightest, but it's not really that light.

 

[d8veh]

I have that same connector on my Ping battery, and nearby is the corresponding male connector. They connect the battery cells to the BMS and there's an instruction to connect them before charging/using the battery. I guess they're left disconnected to stop the BMS slowly draining the battery.

 

[grimbasement]

I realize that the connectors are the balance leads but what are the connectors called?... This pack is way bigger than what I was expecting... Oh well a couple of ammo cans mounted on the rear rack of my mundo and I won't even know it's there while riding... I's only 4 pounds heavier than the 36V 20 AH pack I've been using. I think it'll give me an excuse to clean up the install a little bit....

 

[John in CR]

Not really, but yes it's a bit bigger than a 1000 wh pile of lipo. Not that much weight difference, but about 30% more volume.

People go on and on about lipo being lightest, but it's not really that light.

Yeah, but it's really apples and oranges in this case, because of the power density. The biggie is comparing something like the A123 pack I just built with M1 cells and the RC lipo. That is offset in large part by the fact that if you consistently run the lipo to say 90% DOD, you're virtually guaranteed a major failure, but the lifepo4's will laugh at it, and safely.

I can't wait for the next step, when the currently unobtainable NMC cells become old tech, and we can have lipo power and energy density with better safety and cycle life than lifepo4. The future of our hobby is incredibly bright.

 

[neptronix]

I can't wait for the next step, when the currently unobtainable NMC cells become old tech, and we can have lipo power and energy density with better safety and cycle life than lifepo4. The future of our hobby is incredibly bright.

Dude. Same here.
I'll settle for that awful 200-210whr/kg versus RC lipo which i think is at.... 160whr/kg.. ?
Versus the lifepo4 which is like.. 100-150whr/kg..

You can pick some NMC or NCM stuff up NOW, but it's 1-2C tops.. so much like the ping/headway stuff, just lighter.

 

[auraslip]

Yeah... don't know how I feel about that. On one side the weight will balance nicely in the panniers. On the other hand it means you have to deal with protecting to sides from physical damage.

I think the perspective just makes them look big. I have a 48v20ah pack in my triangle, and it's not a huge bike or anything. Of course it might be a 40ah split pack

That is offset in large part by the fact that if you consistently run the lipo to say 90% DOD, you're virtually guaranteed a major failure, but the lifepo4's will laugh at it, and safely.

Been saying that for a year now. Glad other people understand. OTOH, good luck getting a 20ah battery down to 90% DOD! That's a long ride!

 

[dogman dan]

Yeah, riding say 25 mph, that should see you about 30 miles. Nice! a bit big, but just the thing for a longtail. I'd love to have a pair of 48v 15 ah packs for my longtail. 60-70 mile range at 20 mph. If I piled on all my batteries, ping and lipo, I think I have 100 miles easy.

Re the weight and size. There is no comparing the amps you can pull from lipo compared to lifepo4. Can cells, like A123 or headway expand in volume a lot because of the air between the cells. Weight is often more too. But if you just compare wh to wh, lipo and lifepo4 pouch cells are very close to the same weight.

But the lipo wins every time in the volume per wh contest. Much easier to pack a lot into a small cube.

 

[chvidgov.bc.ca]

That's a split 48 2x10 all right. I'm packing dual Ping 48V 15Ahr packs on my trike in parallel, and I'm good for about 90 miles with moderate assistance on my part, which is a nice range for weekend cruising. Yes they are big and heavy but running split packs or two packs gives a nice balance on a trike, or a long-wheelbase recumbent, with the packs on either side right under the seat. For example a Sun Ez1 or an Ez-sport or TourEasy. I'm not sure why everybody builds their batteries into the triangle, if the goal is long-range comfortable cruising at a nice speed, say 25mph. My C rate is averaging well under 1 C so its nice and easy on the Pings.

 

[outbackhack]

Ever had any luck tracking down those connectors? I'm in the same boat, just received my battery today and need to extend the balancing wires so that I can distribute the 2 parts between my panniers.

Could always cut them off and replace the connectors, but it'd be nice to not have to do that.

 

[amberwolf]

Looks like the JST-SM from what little I can see of it. Same thing that's used for many ebike controller connectors, particularly from Ebikes.ca and Crystalyte, probably others too. Just a version with more pins.

 

[Caliban]

This is the form factor that Ping now ship 48v+ packs, something to do with new International shipping limits for batteries. (I just got the same). If you look on Ping's home page there is a document giving advice on how to hook it up.

 

[mxer]

I'm about to order some of these as connectors.....

http://www.ebike-solutions.de/epages/62204758.sf/de_DE/?ObjectPath=/Shops/62204758/Products/matae/SubProducts/matae

 

[BATFINK]

<null>

I got a 48volt 20amp ping and the same problem pack was split in two and the connectors for BMS were so short. I went to all my electronics stores for those connectors and nobody had them here in UK they are awkward little connectors. Let me know how u get on extending the wires.

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[Jason27]

Those ping batteries look like they weigh a ton.

 

[mrbill]

Looks like the JST-SM from what little I can see of it. Same thing that's used for many ebike controller connectors, particularly from Ebikes.ca and Crystalyte, probably others too. Just a version with more pins.

Lee's Electronics in Vancouver, B.C. also carries them or knock-off JST-SM's and are a better source if you're buying in quantity. They have a web site, but it's better to call and speak with someone to make sure you're getting the right item. (604) 875-1993