RunRyder RC
WATCH
 1 page 994 views POST REPLY
HomeRC & PowerAircraftHelicopter
e-
Electric Battery-Charger-pSupply
› Brand new Pulse packs with high IR
08-30-2013 03:37 AM  5 years agoPost 1
S76 Mech

rrElite Veteran

Hatboro, Pa.

My Posts: All  Forum  Topic

I just bought 2 new Pulse Ultra 6S 3700 packs tonite. Soldered up some EC5's and threw em on the charger. I decided to see what the IR was after the first pack was done charging. I was surprised to see 23mohms on the first pack. The second pack I checked before I even put it on for the 1st charge and it was 35mohms. WTF, I really didn't expect such high IR numbers from brand new packs. Is this normal, do they come down after they discharge the first time? My Gens Ace 3700s have an IR of 6 and 7 mohms.

This is the first time I've used Pulse packs, can someone shed some insight on this for me.

Thanks,
Rick

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-30-2013 04:07 AM  5 years agoPost 2
S76 Mech

rrElite Veteran

Hatboro, Pa.

My Posts: All  Forum  Topic

just checked the IR on pack 2 after its first charge and it came down from 35 to 22.

gonna check em tomorrow after they fly. Hoping they just have to break in. Just never seen such high IR on new packs.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-30-2013 04:33 AM  5 years agoPost 3
Ace Dude

rrProfessor

USA

My Posts: All  Forum  Topic

What are you using to measure the IR?

  

PM  EMAIL  GALLERY  Attn:RR  Quote
08-30-2013 04:49 AM  5 years agoPost 4
S76 Mech

rrElite Veteran

Hatboro, Pa.

My Posts: All  Forum  Topic

I charger 306b

Gaui Greatness X7, X5, NX4, X3

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-30-2013 06:55 PM  5 years agoPost 5
qraptor

rrApprentice

Illinois

My Posts: All  Forum  Topic

IIRC some cells have a protector inside, to reduce the risk of shorting or similar failures in transit. It gets "burned off" after 3-4 charge re-charge cycles. I thought that it reduced the capacity initially, but it is possible that this is the case with these cells.

Just to be on the safe side you may not want to stress the batteries too much over the first 3-4 cycles

PM  EMAIL  Attn:RR  Quote
09-03-2013 02:27 PM  5 years agoPost 6
kamaroman540

rrApprentice

Maple Shade N.J

My Posts: All  Forum  Topic

to high ir??
Hello guys ,still a little new here,whats considered to hi a ir,have packs in the 5-7 range with a little over 100 cycles each.thanks for the help -I used a 3010tomessure them

LOGO600SX LOGO400SE

PM  EMAIL  GALLERY  Attn:RR  Quote
09-03-2013 02:45 PM  5 years agoPost 7
S76 Mech

rrElite Veteran

Hatboro, Pa.

My Posts: All  Forum  Topic

My gens ace packs are all around 5-7 micro-ohms. These pulse packs now have 3 cycles on them and are still around 23m-ohms. Don't get it...

Gaui Greatness X7, X5, NX4, X3

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-03-2013 03:25 PM  5 years agoPost 8
Ace Dude

rrProfessor

USA

My Posts: All  Forum  Topic

It does seem high. Some packs will see their IR go down after ~8-12 cycles. Temperature also plays a huge role in IR measurement.

Can you let all the packs stabilize at room temperature for 8+ hours and then check all the packs again? Will be interesting to see if the IR comes down as the number of cycles on the pack increases.

  

PM  EMAIL  GALLERY  Attn:RR  Quote
09-03-2013 04:39 PM  5 years agoPost 9
JKos

rrProfessor

Redondo Beach, CA

My Posts: All  Forum  Topic

S76 Mech,
How are the Pulse packs performing in flight?

Some brand new Gens Ace packs I have are reading 1 mOhm per cell on my 306B.

- John

RR rules!

PM  EMAIL  GALLERY  Attn:RR  Quote
09-04-2013 12:36 AM  5 years agoPost 10
S76 Mech

rrElite Veteran

Hatboro, Pa.

My Posts: All  Forum  Topic

Jkos, they are performing quite well. I just don't like the high numbers.

My Gens ace are the same way, 1mohm per cell, 6-7mohms per pack.

Pulse packs are 3-4mohm per cell.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-04-2013 01:29 AM  5 years agoPost 11
S76 Mech

rrElite Veteran

Hatboro, Pa.

My Posts: All  Forum  Topic

Just charged both packs from yesterdays flights. Both packs were 23mohms before charge, 13mohms after charge.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-04-2013 01:33 AM  5 years agoPost 12
Ace Dude

rrProfessor

USA

My Posts: All  Forum  Topic

State of charge has little impact on IR numbers, however, temperature does have a significant impact. If you charged them at a high rate or after just completing a flight and they were warm you'll get lower IR readings.

  

PM  EMAIL  GALLERY  Attn:RR  Quote
09-04-2013 02:50 AM  5 years agoPost 13
S76 Mech

rrElite Veteran

Hatboro, Pa.

My Posts: All  Forum  Topic

Agreed. But still confused. I charged them at 2C which is pretty low considering they are rated to a 5C charge. They are by no means warm during or after the charge.

The pack IR remains the same from yesterday after I flew them (23mohms) till this evening when before I recharged them (23mohms). Then, it came down to (13mohms) after charging. Then they stay the same until I fly them.

All this has nothing to do with the fact that the numbers are still 3 times higher then my other packs respectively. Like I said, the packs have 4 flights on them and have not come down permanently in IR numbers.

After a flight they are 23mohms, after a charge 13mohms, consistently.

Is there a PULSE rep that can shed some light on this subject ?

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-04-2013 05:44 PM  5 years agoPost 14
qraptor

rrApprentice

Illinois

My Posts: All  Forum  Topic

Well, after 4 cycles you are right to expect the IR to drop down. This seems too high.

Even if you are getting decent flights at present, my feeling is that they won't have much longevity.

Send an email to the vendor? They may be willing to help.

PM  EMAIL  Attn:RR  Quote
09-04-2013 07:13 PM  5 years agoPost 15
Tyler

rrElite Veteran

Chicagoland area

My Posts: All  Forum  Topic

My Hobby People packs show 1-2mOhms. Some are new. Some are three years old. Occasionally I'll get up to 3mOhms on a pack.

Enjoy things that money can buy IF you don't lose the things money can't buy.

PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2013 06:20 PM  5 years agoPost 16
S76 Mech

rrElite Veteran

Hatboro, Pa.

My Posts: All  Forum  Topic

Good News!
Well after attending the Hamilton RC 'Friend Fly' yesterday, I got 4 flights on the Pulse packs. Flew them pretty hard. At the end of the day, I decided to measure the IR on both packs.

Both packs were down from 23 to 4 total m-ohms. That is an acceptable number for me. I guess qraptor was correct and the packs just needed to be broke-in. So, I would say they took about 10 cycles to get there.

I'm good to go.

Rick

Gaui Greatness X7, X5, NX4, X3

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-09-2013 07:08 PM  5 years agoPost 17
qraptor

rrApprentice

Illinois

My Posts: All  Forum  Topic

Good to hear that

PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 994 views POST REPLY
HomeRC & PowerAircraftHelicopter
e-
Electric Battery-Charger-pSupply
› Brand new Pulse packs with high IR
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Tuesday, December 18 - 10:01 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online