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by 999zip999
Oct 06 2010 10:48pm
Forum: Battery Technology
Topic: How do I know if my lifepo4 is wearing out?
Replies: 19
Views: 1483

Re: How do I know if my lifepo4 is wearing out?

what are the most ah can get out of a 20ah till cut off. I rolled down the hill. then I tested the cell. what the ping cutoff ? 3.1v.
by 999zip999
Oct 06 2010 9:41pm
Forum: Battery Technology
Topic: How do I know if my lifepo4 is wearing out?
Replies: 19
Views: 1483

Re: How do I know if my lifepo4 is wearing out?

O.K., I replaced the one puff cell on the end pos. charged 60.1 not the 61.3v off charger . Rode to 50.7v 18.26ah till the bms cut out is that 838.47 watt/hrs the amount on that one charge. I tried to find a forum ? One cell cut at 3.1v. Now what does all that mean ? Thanks.. it's a 48v 20ah
by 999zip999
Oct 06 2010 3:03pm
Forum: E-Bike General Discussion
Topic: Old School Marin Build
Replies: 72
Views: 11471

Re: Old School Marin Build

I had many problems with 40 amps. on my bmc it would give a hmmmm. in a graling tune. It finnaly got a c.a. turn it down to 25amps. I would ask how many amps a 9c can take a solwer high torque would take more ? If using on hills and that is it use or a tailor not speed. I think if you over amp. it w...
by 999zip999
Oct 06 2010 1:12pm
Forum: E-Bike General Discussion
Topic: What to order from harbor freight?
Replies: 4
Views: 480

Re: What to order from harbor freight?

4$ ? I the sunday paper we get a coupon for a free meter or a free frashlight ect. or it's on sale for 1.99 yes it has reg. 64.6v for my ping the radio shack read 61.1v then tied the H.F. 61.1v it just needed to settle down. they have rolls of scrink tube and pull tires. 150w. big head soldering iro...
by 999zip999
Oct 05 2010 11:53pm
Forum: Battery Technology
Topic: how to diagnose a battery pack/bms problem
Replies: 5
Views: 588

Re: how to diagnose a battery pack/bms problem

You can buy a digatal meter for 1.99 on sale at harbour frieht with a battery. Put the meter on dc 50v or higher for 36v. Or just a higher setting then what you are testing. Do you have any pics.
by 999zip999
Oct 05 2010 11:30pm
Forum: Battery Technology
Topic: Seeking recommendations for a battery pack
Replies: 18
Views: 1310

Re: Seeking recommendations for a battery pack

Ya, Ping can take 2c and I hammer mine always. 48v20ah ping on a crstallyte 4840 turn down to 25amps that is all that battery was meant to do, about 28mph plus. Do get a Cycle antalyst to see how your battery is doing and on some controllers you can adjust your amps thru the c.a. and it will plug ri...
by 999zip999
Oct 05 2010 8:39pm
Forum: Battery Technology
Topic: How do I know if my lifepo4 is wearing out?
Replies: 19
Views: 1483

Re: How do I know if my lifepo4 is wearing out?

Dnmun, Which are the first 4 cells the pos. end red or the other end ? Yes that is my question.
by 999zip999
Oct 05 2010 3:00pm
Forum: Battery Technology
Topic: How do I know if my lifepo4 is wearing out?
Replies: 19
Views: 1483

Re: How do I know if my lifepo4 is wearing out?

I had one set of cells that were low 48v20ah ping last in line 16 pos. red. took the pack apart and saw one pouch went puff the other 3 cell in parrell look o.k. ? So I replace the end one cell and hope the other 3 are good. I did have the other 3 cells but do beleive in high hopes. It seems better ...
by 999zip999
Oct 05 2010 1:20am
Forum: E-Bike General Discussion
Topic: Battery thoughts?
Replies: 27
Views: 2405

Re: Battery thoughts?

Are you done with your battery thoughts 48t-11t. I do have 2 52t off a taumtum. Maybe next.
by 999zip999
Oct 05 2010 12:51am
Forum: E-Bike General Discussion
Topic: Electric Rider Kits?
Replies: 17
Views: 2085

Re: Electric Rider Kits?

The best is a old como steel frame with a 21sp. they are under a 100dls. with good compentes LX ect. 26in. tires. it can take a rear motor or front. about 10yrs. old and save your 700 for the street
by 999zip999
Oct 05 2010 12:27am
Forum: E-Bike General Discussion
Topic: Electric Rider Kits?
Replies: 17
Views: 2085

Re: Electric Rider Kits?

hey that trek 7100 is a 700c and alumin frame ? The crstallyte are heavy and strong. But like a big battery.Do go to these local bike shops see what is off the shelf. They are usaly under power with a small battery. Talk to ilila at ebikessf.com a complete kits plug and play and lifepo4 battery I th...
by 999zip999
Oct 04 2010 3:17pm
Forum: Battery Technology
Topic: Seeking recommendations for a battery pack
Replies: 18
Views: 1310

Re: Seeking recommendations for a battery pack

you must keep to the right limit for the ping. And it will last . It's a 1.5c ? or so. what's the motor controller.
by 999zip999
Oct 04 2010 3:01pm
Forum: Battery Technology
Topic: Ping 48V15Ah WTF
Replies: 100
Views: 9137

Re: Ping 48V15Ah WTF

Dnmun, Ilila at ebikessf tells me he thinks many of the problems to ping is being bounced to hard. Maybe but it is my amp. abuse. what battery do you have and how many ah are in it ?
by 999zip999
Oct 04 2010 2:40pm
Forum: E-Bike General Discussion
Topic: 38 mile commute
Replies: 19
Views: 1568

Re: 38 mile commute

treefarmer, what is the voatage of your battery when your bms cuts out is one cell higher then the rest, last one in line on the pos. end # 16 cell group ? Maybe this is the funny cell ? And tripping the bms ? with it being fully charged.This is one that I have had the most problems with. Good luck....
by 999zip999
Oct 04 2010 2:07pm
Forum: Battery Technology
Topic: Ping 48V15Ah WTF
Replies: 100
Views: 9137

Re: Ping 48V15Ah WTF

Dnmun, I thought you had been thru the ping thing. Where do you get all your battery know how ? I want to know what battery you have and how mamy ah are in there ?
by 999zip999
Oct 04 2010 12:52pm
Forum: E-Bike General Discussion
Topic: 48v 20ah
Replies: 12
Views: 1149

Re: 48v 20ah

Bebob, I have one those pings split pack 48v20ah and have a 4840 crstallyte controller on a 600w bmc. It been very hard on the battery but it's been fun 37mph is just about right on the street. It seems the 16th cell last pos. cell in line takes the most or all the aburst (?) But this is all that 40...
by 999zip999
Oct 03 2010 2:58pm
Forum: E-Bike General Discussion
Topic: Old School Marin Build
Replies: 72
Views: 11471

Re: Old School Marin Build

I think you well love the headways at lest it is 16 cells not 64 or more. and a high c-rate. What bms ? What a bms ? Would that be a 60amp. ? If one is used ?
by 999zip999
Oct 03 2010 2:16pm
Forum: E-Bike General Discussion
Topic: Manufacturers and dealers to avoid
Replies: 368
Views: 73119

Re: Manufacturers to avoid

I got a new C.A. and plugged it in to my 4840 crst. con. to turn it down to 25amp. to save my 48v20ah ping. Yes yes finnaly. O.k. I do the shunt adj. with the second stand alone C.A. o.k. no help 33amps. full throttle. Yes I did turn it down to 25amp.So I send it back to with the 4840 crstallyte con...
by 999zip999
Oct 03 2010 1:27pm
Forum: Battery Technology
Topic: Signalab bms, need more amps.
Replies: 36
Views: 4139

Re: Signalab bms, need more amps.

My toughts would be to solder across the shunts and not pick two on the side. I'm led to believe that a limter set at 25a will see a spike up to 30a. for a short time ? What motor set up you running ? I have a 60amp. ping bms it has 10 fets to the 5 on the 30 or 40amp. ( ? ) singalab. Hey is ping si...
by 999zip999
Oct 02 2010 10:06pm
Forum: Battery Technology
Topic: Seeking recommendations for a battery pack
Replies: 18
Views: 1310

Re: Seeking recommendations for a battery pack

docnjoj how do you hook them up ? Do you make a pack ?
by 999zip999
Oct 02 2010 8:58pm
Forum: Battery Technology
Topic: HVC for ping 48v 2a charger ?
Replies: 5
Views: 549

Re: HVC for ping 48v 2a charger ?

Dnmun I'm asking if I can turn up and use the sla charger it now is at 53.4v
by 999zip999
Oct 02 2010 8:47pm
Forum: Battery Technology
Topic: Signalab bms, need more amps.
Replies: 36
Views: 4139

Re: Signalab bms, need more amps.

I think ping told me to put solder on the shunts to raise the amp output. Ping also has a 60amp.BMS it's a lot bigger in size. Before you put solder on it let someone else back these up.
by 999zip999
Oct 02 2010 8:40pm
Forum: Battery Technology
Topic: HVC for ping 48v 2a charger ?
Replies: 5
Views: 549

Re: HVC for ping 48v 2a charger ?

Dnmun I looking to barrow a camera before I take apart my ping charger. I took it apart one time to oil the fan but didn't what to brake the fan blade. I found a 48v 2.5a sla charger . It has a small square black thing with a adjustment screw with a touch of red paint on it I thing so they know if y...
by 999zip999
Oct 02 2010 11:29am
Forum: Battery Technology
Topic: Seeking recommendations for a battery pack
Replies: 18
Views: 1310

Re: Seeking recommendations for a battery pack

36v yes but please help c-rate,ah, $.$. ? Hills or flat speed ? What motor ? bike or trike ? Plug and play always. I would buy a higher C- rate than needed.
by 999zip999
Oct 02 2010 10:29am
Forum: Battery Technology
Topic: HVC for ping 48v 2a charger ?
Replies: 5
Views: 549

HVC for ping 48v 2a charger ?

My ping 48v 2a charger hits 61.3v Is this a little higher then it needs to be ? Or If it charged at 58v will it still balance through the bms if all led (2.5) lights go on with the cells being 3.6v ? Can the charger be turned down ? Would this be easier on the life of my battery ? Should I wait till...