Mini-Z, Kyosho Mini-Z Racer, MR-03, MR-02, MA-010, Forums, News, Pictures, Parts, and Shop - Mini-ZRacer.com
Forums, Mini-Z, MiniZ, Kyosho Mini-Z, Kyosho MiniZ, Kyosho Mini-Z Racer
Mini-Z Hop-Ups, Mini-Z Parts, MiniZ Hop-Ups, MiniZ Parts, Kyosho Mini-Z Hop-Ups, Kyosho Mini-Z Parts, Kyosho MiniZ Hop-Ups, Kyosho MiniZ Parts, Kyosho Mini-Z Racer Hop-Ups, Racer Kyosho Mini-Z Parts
Old 2013.08.20, 10:13 AM   #46
Felix2010
Registered User
 
Join Date: Dec 2006
Location: Southern NH
Posts: 985
Please forgive my ignorance if this is already said quazster, but does your prototype discharger unit measure Internal Resistance, either actual or real-time? This is something I fooled with using my MuchMore CellMaster Platinum SP ED. and found the IR data told a lot about how a cell could handle high amp draw while maintaining maximum voltage (Good for Mod guys)
Thanks for all the info and pics! Very interesting! Great job
__________________
*** TOP SECRET MOTORS ***
[FONT="Book Antiqua"]
Felix2010 is offline   Reply With Quote
Old 2013.08.21, 03:47 AM   #47
quazster
Registered User
 
Join Date: Jun 2012
Posts: 48
Forgot to add it to features, yes it has a function to measure internal resistance. For now it is a separate test, I haven't had time to code a function that does IR measurement during discharging for example every 5 seconds or every 30 seconds or whatever I want. It is easily done, only needs some coding work, and it is also in my todo-list.

Best way to match batteries quickly so far (without Excel work) has been a function that discharges 300mAh at 3A and calculates how many mWh battery gives out.

IR reading is very much dependant on the battery temperature and state of charge. This is why I have to finish the constant discharge function with repeated IR measurements.

Last edited by quazster; 2013.08.21 at 04:49 AM.
quazster is offline   Reply With Quote
Old 2013.08.23, 02:20 AM   #48
Felix2010
Registered User
 
Join Date: Dec 2006
Location: Southern NH
Posts: 985
"DISCHARGE*** 300mAh at 3A and calculates how many mWh battery gives out.


This is great info, thank you for sharing!

ALso, you mention these as "prototypes".. Are you planning to sell any of these Discharge Stations??? It is very cool and a interesting new way to easily match packs without doing these math
__________________
*** TOP SECRET MOTORS ***
[FONT="Book Antiqua"]
Felix2010 is offline   Reply With Quote
Old 2013.08.23, 02:24 PM   #49
quazster
Registered User
 
Join Date: Jun 2012
Posts: 48
No plans to sell now but we will most likely do a second, bit more sophisticated version just for fun. And maybe do a small batch of devices for sale, who knows.

This has so far been a nice research project to the world of AAA Nimh batteries :-)
quazster is offline   Reply With Quote
Old 2013.08.24, 11:11 PM   #50
Felix2010
Registered User
 
Join Date: Dec 2006
Location: Southern NH
Posts: 985
Excellent job on this device and thank you for the info. I for one am looking forward to possible additional updates, thanks again!
__________________
*** TOP SECRET MOTORS ***
[FONT="Book Antiqua"]
Felix2010 is offline   Reply With Quote
Old 2013.11.06, 08:21 AM   #51
quazster
Registered User
 
Join Date: Jun 2012
Posts: 48
Coded a new function some weeks back. Was sick at home and off work for few days so had time to make this work.

Functions:
- discharge at constant 3A current
- two GUI configurable mAh limits that control the result points
- three IR measurements during the discharge, first at start before the discharge begins, second at first mAh limit and third at second mAh limit
- results are displayed on the screen real time during discharge
- function gives out 7 different results from the battery, 3x IR readings, the average voltages between 0 - first mAh limit, first mAh limit - second mAh limit, second mAh limit - discharge to 0.9v, and total mAh discharged

This works really good and the batteries are easily tested and it is fast to write the results to Excel to sort the batteries with the reading of choice.

Here is a photo of some of my matched batteries and the results screen, first mAh limit is 50, second 300mAh:
https://drive.google.com/file/d/0Byz...it?usp=sharing
quazster is offline   Reply With Quote
Old 2014.12.30, 10:18 AM   #52
Jshwaa
Registered User
 
Jshwaa's Avatar
 
Join Date: Dec 2014
Posts: 218
Like the concept here. How far did the design go? Did it provide any marked improvement on cell life, charge cycles, or charge/discharge performance?

Sounds like you are just trying to duplicate the discharge profile of cells running in an RC on a track. I'd like to know how you were able to capture that information so as to duplicate it, while running on a track.
Jshwaa is offline   Reply With Quote
Old 2015.03.24, 07:16 AM   #53
quazster
Registered User
 
Join Date: Jun 2012
Posts: 48
Quote:
Originally Posted by Jshwaa View Post
Like the concept here. How far did the design go? Did it provide any marked improvement on cell life, charge cycles, or charge/discharge performance?

Sounds like you are just trying to duplicate the discharge profile of cells running in an RC on a track. I'd like to know how you were able to capture that information so as to duplicate it, while running on a track.
No improvement on cell life, charge cycles or charge/discharge performance at cell level.

But huge improvement on the visibility on single cell performance, capability to choose the best of the best cells for the big A-mains, ability to detect in real time when one cell starts to go bad, also we have learned the right way to charge, discharge and store cells.

Overall we just get the most out of our batteries and get the edge over our competitors here

No new developments on the device, the two prototypes we made 3 years ago are working too well still, and because they just have been too good we haven't had the motivation to design any new hardware
quazster is offline   Reply With Quote
Old 2015.03.24, 08:17 AM   #54
Jshwaa
Registered User
 
Jshwaa's Avatar
 
Join Date: Dec 2014
Posts: 218
Quote:
Originally Posted by quazster View Post
No improvement on cell life, charge cycles or charge/discharge performance at cell level.

But huge improvement on the visibility on single cell performance, capability to choose the best of the best cells for the big A-mains, ability to detect in real time when one cell starts to go bad, also we have learned the right way to charge, discharge and store cells.

Overall we just get the most out of our batteries and get the edge over our competitors here

No new developments on the device, the two prototypes we made 3 years ago are working too well still, and because they just have been too good we haven't had the motivation to design any new hardware
That's interesting. Something I've wondered about.... If you were to keep a group of 4 cells 'together' through all charge/discharge cycles, do you think that each cell would degrade at different rates?

Do you believe any variations you experience between cells would be due to manufacturing variations, or is it due to mixing your cells between one charge/discharge cycle and the next?

It may be interesting to see if, in a 4 cell series configuration, whether or not the most positive cell or the most negative cell experiences any different loading conditions, where it may be prudent to rotate the individual placement of each cell in the 4 cell series configuration between each cycle, so that the cells would wear in evenly so to speak.

At any rate, your charge/discharge datalogger sounds like it has some interesting potential, however I'm glad you're getting the most out of it in your club. It really does all start with the cells...
__________________
Electrical Engineer
Mini-Z/RC Enthusiast
Jshwaa is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Building a new MR-02 and need advice G'ZOX Mini-Z Racer MR-02 17 2005.08.10 11:33 PM
Help with Track building carlsenjesper Race Tracks, Track Layouts, Track Accessories 8 2005.01.17 09:49 AM
RCP Track Building Program RCPMini-z Tracks and GTGs 5 2004.10.24 10:42 PM
Custom Track Building DogbreathRacing Mini-Z Overland MV-01 33 2004.02.08 12:52 PM


All times are GMT -5. The time now is 09:13 AM.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright ©2011 Mini-ZRacer.com
Mini Inferno Sale - Up to $85 Instant Savings!
Micro-T Hop-Ups
RC18R, M18, Micro RS4, Mini-LST, TamTech-Gear, Minizilla, RC18T, RC18B, RC18MT
shop.tinyrc.com Products

more»
Tiny RC Community News
[03/22/17] MZR was on vacation, didn't... : All kidding aside, the host experienced a bit of a server meltdown last week and efforts to restore the site to a new server took longer than anticipated. The current server is temporary until - more»
[11/25/15] Did You Hear? Our Black... : Hey Racers,
We're getting started a bit early with our Black Friday sale this year.  Generally we're not supporters of retailers opening early on Thanksgiving, but in our case, we're - more»
[06/30/15] shop.tinyrc.com: Have You... : Hey All! Just a quick reminder to everyone that we post all of our shop.tinyrc.com Newletters here on the MZR Forum. If for some reason you miss them in your email inbox, you can always see the - more»
Mini-Z, Mini-Z Racer, MR-02, MA-010
M18, M18T, RC18T, Mini-LST, Mini-T, Micro RS4, XRay, 1/18, 18th scale
XMODS, XMOD, Micro Flight, ZipZaps, ZipZaps SE, Bit Char-G, MicroSizers, TTTT, Plantraco Desktop Rover, SuperSlicks, Digi Q
Mini Inferno, Mini Inferno ST, half EIGHT, 1/16, 16th scale
Epoch, Indoor Racer, 1/43, 43rd scale
E-Savage, eSavage, eZilla, e-Zilla, HPI
Robots, Bots, Bipeds, Wheeled, Manoi, Roomba, NXT, Lego, Hacking
Crawling, Crawlers, Micro, RC, Losi Mini-Rock Crawler, Duratrax Cliff Climber
Kyosho Minium, Caliber 120, Minium Forums
Mini-Z Hop-Ups, Mini-Z Parts, Mini Inferno Hop-Ups, Mini Inferno Parts, M18 Hop-Ups, M18 Parts