Author Topic: Battery Simulator / Energy Usage Data Logger/Monitor  (Read 2582 times)

0 Members and 1 Guest are viewing this topic.

Offline MotoDanTopic starter

  • Contributor
  • Posts: 45
Battery Simulator / Energy Usage Data Logger/Monitor
« on: June 09, 2022, 09:44:41 pm »
Hello all,

I am looking for a piece of test equipment that is used to determine the amount of power consumption for battery-powered iOT and embedded devices. The device basically replaces the battery of the UUT and essentially makes very fast current measurements and builds a power consumption profile which can be used to determine a devices expected battery life.

I think most of us just do the best we can at estimating our product's projected battery life based on what we have for power usage calculations. A device like I am looking for should provide a very accurate battery life prediction based on actual energy profiles (sleep, active, xmit, rcv, etc.) over a certain sample period.

There seems to be a few different products on the market. Here's a link for several related products:

https://pallavaggarwal.in/dc-current-analyzer-for-embedded-iot-product-development/

I have the Current Ranger as well as Dave's uCurrent, but neither are really very useful for integrating the power usage over time. The Joulescope looks to be the closest to what I am looking for.

Does anyone have any experience with this type of logger/monitor?

TIA
« Last Edit: June 09, 2022, 11:55:46 pm by MotoDan »
 

Online Smokey

  • Super Contributor
  • ***
  • Posts: 3044
  • Country: us
  • Not An Expert
 

Offline Xandinator

  • Contributor
  • Posts: 34
  • Country: 00
Re: Battery Simulator / Energy Usage Data Logger/Monitor
« Reply #2 on: July 30, 2022, 11:39:36 pm »
Not to forget:
R&S NGM200 = https://www.rohde-schwarz.com/us/products/test-and-measurement/dc-power-supplies/rs-ngm200-power-supply-series_63493-652229.html
https://goughlui.com/2019/08/20/launch-day-review-rohde-schwarz-ngm202-power-supply-overview/ has made some nice, extensive reviews.
With fastlog you can almost gaze at some µCs processing different instructions...
 
The following users thanked this post: pdenisowski

Offline pdenisowski

  • Frequent Contributor
  • **
  • Posts: 929
  • Country: us
  • Product Management Engineer, Rohde & Schwarz
    • Test and Measurement Fundamentals Playlist on the R&S YouTube channel
Re: Battery Simulator / Energy Usage Data Logger/Monitor
« Reply #3 on: August 01, 2022, 01:45:14 pm »
Not to forget: R&S NGM200

With fastlog you can almost gaze at some µCs processing different instructions...

Yes, the FastLog feature on the NGM can log up to 500,000 samples per second.  The NGM also has a very good battery simulator mode, with user-definable battery models, and it can act as both a source and sink.

I made a video that provides a brief introduction to these (and many other) NGM features:



FastLog and battery simulation are from 13:23 to 18:00.
Test and Measurement Fundamentals video series on the Rohde & Schwarz YouTube channel:  https://www.youtube.com/playlist?list=PLKxVoO5jUTlvsVtDcqrVn0ybqBVlLj2z8
 
The following users thanked this post: AndersJ

Offline Steve77

  • Newbie
  • Posts: 2
  • Country: us
    • QRS Technologies
Re: Battery Simulator / Energy Usage Data Logger/Monitor
« Reply #4 on: July 22, 2023, 09:21:49 pm »
Paul,

Sorry to comment on such an old thread, however, that was one fantastic presentation.  One of the best I have ever seen on a piece of test equipment.  I think you just altered my budget for my battery operated project. 
 
The following users thanked this post: pdenisowski

Offline pdenisowski

  • Frequent Contributor
  • **
  • Posts: 929
  • Country: us
  • Product Management Engineer, Rohde & Schwarz
    • Test and Measurement Fundamentals Playlist on the R&S YouTube channel
Re: Battery Simulator / Energy Usage Data Logger/Monitor
« Reply #5 on: July 23, 2023, 04:46:21 pm »
Paul,

Sorry to comment on such an old thread, however, that was one fantastic presentation.  One of the best I have ever seen on a piece of test equipment.  I think you just altered my budget for my battery operated project.

Don't ever be sorry to leave comments like those :) - thanks!
Test and Measurement Fundamentals video series on the Rohde & Schwarz YouTube channel:  https://www.youtube.com/playlist?list=PLKxVoO5jUTlvsVtDcqrVn0ybqBVlLj2z8
 

Offline mdredmond

  • Newbie
  • Posts: 4
  • Country: us
Re: Battery Simulator / Energy Usage Data Logger/Monitor
« Reply #6 on: August 14, 2023, 01:04:15 am »
Quote
Don't ever be sorry to leave comments like those

@pdenisowski What would be the best way to obtain good data to use for the battery simulator?  The NGM looks like something we need and it's in budget.  I am working on some sleepy devices that have occasional fairly high current needs (>300mA) and the current plan is to use two Energizer lithium primary cells.  Is the data in this datasheet sufficient to model the batteries?   

https://data.energizer.com/pdfs/l91.pdf
« Last Edit: August 14, 2023, 01:27:43 am by mdredmond »
 

Offline pdenisowski

  • Frequent Contributor
  • **
  • Posts: 929
  • Country: us
  • Product Management Engineer, Rohde & Schwarz
    • Test and Measurement Fundamentals Playlist on the R&S YouTube channel
Re: Battery Simulator / Energy Usage Data Logger/Monitor
« Reply #7 on: August 14, 2023, 08:14:34 am »
Quote
Don't ever be sorry to leave comments like those

@pdenisowski What would be the best way to obtain good data to use for the battery simulator?  The NGM looks like something we need and it's in budget.  I am working on some sleepy devices that have occasional fairly high current needs (>300mA) and the current plan is to use two Energizer lithium primary cells.  Is the data in this datasheet sufficient to model the batteries?   

https://data.energizer.com/pdfs/l91.pdf

The datasheet should be sufficient.  You could measure the relevant quantities yourself as you discharge the batteries, but I would imagine the manufacturer has done this carefully / rigorously and that the datasheet numbers represent a large number of measurements (i.e. they tested lots of batteries).
Test and Measurement Fundamentals video series on the Rohde & Schwarz YouTube channel:  https://www.youtube.com/playlist?list=PLKxVoO5jUTlvsVtDcqrVn0ybqBVlLj2z8
 
The following users thanked this post: mdredmond

Offline mdredmond

  • Newbie
  • Posts: 4
  • Country: us
Re: Battery Simulator / Energy Usage Data Logger/Monitor
« Reply #8 on: August 14, 2023, 12:44:39 pm »
Paul, one more thing...  Is the NGM as appropriate for this problem as a Source Measure Unit would be?  Something like the NGU?  Either is a lot of money and I want to get it right the first time.

Thanks!
 

Offline pdenisowski

  • Frequent Contributor
  • **
  • Posts: 929
  • Country: us
  • Product Management Engineer, Rohde & Schwarz
    • Test and Measurement Fundamentals Playlist on the R&S YouTube channel
Re: Battery Simulator / Energy Usage Data Logger/Monitor
« Reply #9 on: August 15, 2023, 02:00:57 pm »
Paul, one more thing...  Is the NGM as appropriate for this problem as a Source Measure Unit would be?  Something like the NGU?  Either is a lot of money and I want to get it right the first time.

They both should be fine for battery simulation - it really depends on what your specific needs are and what else you might use it for.

Incidentally, I also did a video about the NGU

Test and Measurement Fundamentals video series on the Rohde & Schwarz YouTube channel:  https://www.youtube.com/playlist?list=PLKxVoO5jUTlvsVtDcqrVn0ybqBVlLj2z8
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf