LifePo BMS and audio quality - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st March 2014, 08:01 PM   #1
nkostop is offline nkostop  Greece
diyAudio Member
 
Join Date: Oct 2012
Default LifePo BMS and audio quality

Hello, i am thinking of building a battery power supply for my amplifier.
I was checking on LiFePo batteries which need a BMS to operate.
I was concerned if a BMS like this:
12V 14.6V 30A LiFePo4 Battery BMS LFP PCM SMT System 4S eBike battery Pack / DIY | eBay

Which has a lot of switching mosfets will introduce noise to the amplifier?
What is the best way to connect an amp with a lifepo battery?
  Reply With Quote
Old 1st March 2014, 09:04 PM   #2
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
ebay links don't work on here. You need to post the item number.

It may have switching MOSFETs but they are not switching at a frequency.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 1st March 2014, 09:14 PM   #3
nkostop is offline nkostop  Greece
diyAudio Member
 
Join Date: Oct 2012
Oh sorry, i am new to the forum.
The number is:
eBay item number:321046261305

Hope this helps. And please if you can explain to me why it will not affect the audio quality i would be gratefull. Secondly does this change the impedance?
  Reply With Quote
Old 3rd March 2014, 08:23 AM   #4
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
They are being used as switches. The impedance of the MOSFETs shouldn't be a problem, the current limiter in the batteries would be more of a concern.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 3rd March 2014, 08:26 AM   #5
peufeu is offline peufeu  France
diyAudio Member
 
Join Date: Mar 2001
Location: Lyon, France
BMS Mosfets are normally ON. If the controller detects an error condition like overcurrent, overcharge, overdischarge, etc, they will be switched OFF. If your amplifier never draws more than the specified current for your BMS (here 30A) then the MOSFETs will always be ON and you won't have any problems.
  Reply With Quote
Old 3rd March 2014, 02:51 PM   #6
nkostop is offline nkostop  Greece
diyAudio Member
 
Join Date: Oct 2012
Ok! i got it! In normal conditions there is no problem.
Is these items from ebay any good? Are there any other option you could suggest?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Batteries lifepo in Europe? juanito Power Supplies 11 18th March 2013 11:24 AM
BMS Pro Audio, 18", 8", horns, ultimate 3-way setup, mint mikey7182 Swap Meet 10 11th December 2012 07:21 PM
Mable Audio vs. Suppo audio sound quality imnewbie Tubes / Valves 9 5th August 2010 08:46 AM
Audio Quality from CD's poulkirk Digital Source 16 16th September 2003 11:37 AM


New To Site? Need Help?

All times are GMT. The time now is 09:36 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2