Ping 2.0 Reports
- Thread starter pwbset
- Start date
ZapPat
10 kW
I just ordered one today, with a 2 week lead time and one week delivery. I just wish it were here in my lithium-greedy little hands NOW!pwbset said:
I'll post when I have done a few runs done with it, along with some data (sag, resistance, etc).
Pat
ZapPat
10 kW
A 48V4Ah Ping pack might have trouble giving you equivalent peak power that your RC pack is giving you now. Do you know how many amps you use maximum from your RC pack when you either go up hills, or accelerate? The ping pack would give you only about 384 watts continous going by the 2C rating. What are your RC batts rated at (Ah/C rating/chemistry)? How long do they presently last on your bike?mingonn said:
Ping's new cells are supposedly rated at 4C peak, but I don't know for how long. I suppose that your BMS will be set for 8A continous (2C), and it makes me wonder if it would even let you use the 16A peak rating for any time at all... somehow I don't think so. Maybe it will give spikes of up to 16A for milliseconds or something like that, but no more. Only tests will tell!
Looking forward to your results, Derek!
Pat
Hi Pat,
I haven't measure the current draw of the 44.4v RC lipo pack yet but when I was using a 2x18v Nicad drill pack I was pulling 2 amps continuous @ 19 kmh on the flat and WOT from 5 km/h would pull 10 amps.
I now cruise at 22 km/h with the lipo pack but I would still expect it to be around the same 2 amps cruise and 10 amp peak. On my 12 km ride to work I try to keep my speed at 22 km/h by pedaling when I need to and have been putting 4000mah back in when I recharge at each end. Going to try a return trip tomorrow, cell voltage was 3.95v = approx 65% SOC after 12km so it should be good for another 12 km....fingers crossed. Planning to always charge at work, just curious to see if it will do the distance. Bought the cheapest no name Lipo I could find on ebay, US$100 for 3 x 14.8v 3800mah packs so I am not too fussed if they pack it in.
Hoping for 24 km/h with the extra 4v from the 48v ping pack and 1000 + cycles
Ping said the pack has been tested and should be in the post in the next day or two!!
Derek
I haven't measure the current draw of the 44.4v RC lipo pack yet but when I was using a 2x18v Nicad drill pack I was pulling 2 amps continuous @ 19 kmh on the flat and WOT from 5 km/h would pull 10 amps.
I now cruise at 22 km/h with the lipo pack but I would still expect it to be around the same 2 amps cruise and 10 amp peak. On my 12 km ride to work I try to keep my speed at 22 km/h by pedaling when I need to and have been putting 4000mah back in when I recharge at each end. Going to try a return trip tomorrow, cell voltage was 3.95v = approx 65% SOC after 12km so it should be good for another 12 km....fingers crossed. Planning to always charge at work, just curious to see if it will do the distance. Bought the cheapest no name Lipo I could find on ebay, US$100 for 3 x 14.8v 3800mah packs so I am not too fussed if they pack it in.
Hoping for 24 km/h with the extra 4v from the 48v ping pack and 1000 + cycles
Ping said the pack has been tested and should be in the post in the next day or two!!
Derek
My ping v2 with the 4ah cells has just been dropped off, will have in my sweaty palms tonight !! Will charge it up, weigh it and take some photos tonight.
Its only a little 4ah 48v pack for my 12km ride, current draw for my ebike rarely gets above 8A so it should be fine for the 2C rating.
I have been using a 44.4v 3800mah RC lipo pack, the 14.8v packs had 12C on them. 14 cycles and 200 km so far and they are going strong, not bad for $100
Can't wait to see how they perform
Derek
Its only a little 4ah 48v pack for my 12km ride, current draw for my ebike rarely gets above 8A so it should be fine for the 2C rating.
I have been using a 44.4v 3800mah RC lipo pack, the 14.8v packs had 12C on them. 14 cycles and 200 km so far and they are going strong, not bad for $100
Can't wait to see how they perform
Derek
Sorry about the delay, off skiing in New Zealand for two weeks tomorrow so have been busy getting ready.
My 48v 4ah ping pack weighed in at 2110g compared to my 44.4v 3.8ah lipo pack at 1010g.
Pack is covered in blue heat shrink with the bms covered in yellow heat shrink. You can see a bit of silver tape at one end but the wiring end seems to be covered in a piece of hard plastic. Bms is a separate part.
Took it for a spin at the local veledrome today, only did 3 km but it held 31 km for the whole distance. Pack was cool to the touch.
Acceleration seems to be a slightly less than my current 44.4v lipo 3.8ah lipo pack, but the top end seem consistent with with extra 3.6 volts.
Will put it into service when I get home and see how it goes on the road.
Sorry about the lack of pictures, accidentally reformatted my camera and am running out of time.
Bought my pack directly from Ping, no worries at all. Went to Hong Kong first then FedEx to OZ. Great deal
Cheers
Derek
My 48v 4ah ping pack weighed in at 2110g compared to my 44.4v 3.8ah lipo pack at 1010g.
Pack is covered in blue heat shrink with the bms covered in yellow heat shrink. You can see a bit of silver tape at one end but the wiring end seems to be covered in a piece of hard plastic. Bms is a separate part.
Took it for a spin at the local veledrome today, only did 3 km but it held 31 km for the whole distance. Pack was cool to the touch.
Acceleration seems to be a slightly less than my current 44.4v lipo 3.8ah lipo pack, but the top end seem consistent with with extra 3.6 volts.
Will put it into service when I get home and see how it goes on the road.
Sorry about the lack of pictures, accidentally reformatted my camera and am running out of time.
Bought my pack directly from Ping, no worries at all. Went to Hong Kong first then FedEx to OZ. Great deal
Cheers
Derek
ZapPat
10 kW
jha07 said:
I think Ping did a good move in making them different on the outside to reflet the differences on the inside...
Ping just emailed me to say that the battery was leaving there, so I'll have it in about a week (I hope!). I'll post here when I get it and have taken it for a run or two. I'll also post some test results to let everyone know how much sag these new cells will show under different loads (very important purchase info everyone should know before buying a battery IMHO).
As for the name... maybe... PingWraps? PingShrinks? Ping V2's?
Ypedal
100 TW
Ping Pong
ururk
10 mW
- Joined
- Jul 3, 2008
- Messages
- 20
I guess I could check with Ping, but I ordered a pack direct from him (36v, 12Ah), and it came with black duct tape (gaffers tape perhaps), and the BMS was in a yellow shrink-wrap tube.
Either way (v1, v2), I'm sure it will work out all right. I'm not entirely sure the benefits of the newer pack, but I know I won't be pushing the envelope as others here do. I'm just glad he was able to configure it in the size I needed!
Either way (v1, v2), I'm sure it will work out all right. I'm not entirely sure the benefits of the newer pack, but I know I won't be pushing the envelope as others here do. I'm just glad he was able to configure it in the size I needed!
As I understnad it, V2 uses a different cell and BMS. Higher continuous C rating and suppised to be able to hook packs up in series and parallel. A while back Ping mentioned he was trialling a new hard cased cell, is the V2 pack made of these, or still foil pouch cells ?
ZapPat
10 kW
I understand they're still pouches, but 4Ah each one instead of 5Ah, and having better discharge and charge rates (and I hope lower voltage sag due to lower internal DC resistance).Pete said:
I have had a ping v2 36v 16ah for a few days. Its almost a cube shape, with black tape on it, and a yellow shrink wrapped BMS.
I'm using it with a 250w motor on a relatively heavy bike. In order to test the battery, I managed 29 miles on a route with some steep (up to 16%) hills with little or no pedalling. The battery did not even get warm, unlike my controller. The supplied charger takes 8 hours to charge.
I'm using it with a 250w motor on a relatively heavy bike. In order to test the battery, I managed 29 miles on a route with some steep (up to 16%) hills with little or no pedalling. The battery did not even get warm, unlike my controller. The supplied charger takes 8 hours to charge.
dogman dan
1 PW
Excellent, with a 250 watt motor your small pack should do fine. Those with larger, need to look at the real watts of the motors and controllers before they order small ones. From what I see on the specs, most bikes will still be happier with the 20 ah size. Using too small a size will still reduce cycle life compared to a larger one. With the new cells, if you keep the discharge rate below 1c you can expect to still have a pretty functional battery after 3000 cycles. And if the large size means you only use about half the capacity a lot of the time, who knows how many bikes the battery will outlast! A few hundred more up front is going to save you a fortune later compared to burning up the battery early. I can't see how a wopping 20 pounds for a 48v 20 ah is going to be so hard to carry. With the abilty to series or parralell now, a pair of 24v 20 ah would be a killer way to stay legal on the street, and still haul ass once out of town.
chessir said:
$516 including shipping via Hong Kong to the UK. That included the charger. I dont really want to charge faster, as I am charging via a solar panel arrangement and this would impact my float batteries.
I have found ping to be extremely helpful and professional. It sounds like he is pretty busy now as his reputation has got around.
Ping said the pack is made of 4ah cells.
ZapPat
10 kW
All very good advice to anyone planing an ebike, dogman!dogman said:
QwertyAccess
100 µW
- Joined
- Jul 21, 2008
- Messages
- 8
has anyone confirmed if you can series the packs, i sent an email and he said these aren't the new generation yet?
ZapPat
10 kW
QwertyAccess said:
This is what I understood clearly from Ping too... but I wasn't ready to wait until they choose a new one (I heard they were testing three different ones before deciding).
chessir said:
ABCnews-Headline today:
Researchers have made a major advance in inorganic chemistry that could lead to a cheap way to store energy from the sun. In so doing, they have solved one of the key problems in making solar energy a dominant source of electricity.
Rows of solar panels at the Amareleja solar plant in southern Portugal (Feb. 29, 2008).
(Armando Franca/AP Photo)Daniel Nocera, a professor of chemistry at MIT, has developed a catalyst that can generate oxygen from a glass of water by splitting water molecules. The reaction frees hydrogen ions to make hydrogen gas. The catalyst, which is easy and cheap to make, could be used to generate vast amounts of hydrogen using sunlight to power the reactions. The hydrogen can then be burned or run through a fuel cell to generate electricity whenever it's needed, including when the sun isn't shining.
Paul Is this beneficical to you? Are there serious possibilities for Ebikes here -possibly with solar clothing?
QwertyAccess
100 µW
- Joined
- Jul 21, 2008
- Messages
- 8
paul-home said:
A good picture of the BMS may help, it'll also be good reference.
chessir said:
Hydrogen energy sources are a whole new ball game. I suspect that such things will not be affordable for ordinary people for decades, but it certainly looks promising.
Electric bikes dont use huge amounts of electricity. If using one means not using a car, then that is perhaps the most effective use of a solar panel possible. I travel 42 miles a day (21 each way) to work, using just under 1 killowatt hour of power from the batteries. That does not need a very large solar panel at all. With petrol at about 120 pence per litre in the UK, an electric bike and solar panel setup can pay for itself in very little time, ignoring the environmental benefits.
Sorry for invading the Ping thread!
dogman dan
1 PW
Actually 1 killowatt is still a pretty expensive setup. Like a thou in us dollars, and will pay off at a rate of about a dime a day, so it still takes years to break even. Nevertheless, totally green transportation- Priceless.
Too bad the newest Pings have the old BMS. I had wondered why the specs really hadn't changed from the old ones when the cells were supposed to have a higher discharge rate. Maybe when the new bms comes out, maybe the newest packs can be retrofitted so a higher discharge rate could be done without reducing the number of cycles the pack delivers. Something in the range of 35 amps rated, 50 amps continuous would then make the use of a Phoenix motor ok, or maybe with two batteries or more parralelled, etek motorcycles. Since Lifepo4 lasts for years, my plan is to buy some every year for some time, till I have enough to make a bigger ev.
Too bad the newest Pings have the old BMS. I had wondered why the specs really hadn't changed from the old ones when the cells were supposed to have a higher discharge rate. Maybe when the new bms comes out, maybe the newest packs can be retrofitted so a higher discharge rate could be done without reducing the number of cycles the pack delivers. Something in the range of 35 amps rated, 50 amps continuous would then make the use of a Phoenix motor ok, or maybe with two batteries or more parralelled, etek motorcycles. Since Lifepo4 lasts for years, my plan is to buy some every year for some time, till I have enough to make a bigger ev.
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