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The purpose of this thread is to evaluate and discuss the internal resistance of various batteries and (possibly?) test methods.
I’ll start this off by using the DC Load method to test some XS AGM, some K2 73Ah cells, and some K2/JYP 80Ah cells. The DC load method was used because that’s all the equipment that I had available or was able to purchase quickly and on the cheap. Here’s a link for more information on Load Test Methods.
Calculation used was Rint = ((Vrest/Vload) -1) x Rload)
Rint = internal resistance
Vrest = Voltage at rest
Vload = Voltage once load is applied
Rload = resistance of the load resistor
Now onto some pictures of the setup. If there is something amiss please chime in so we can figure it out.
1ohm load resistors (although they test out at 0.9ohm)
I connected them in series on one end, and I can change the resistance by simply connecting my jumper wire differently. I have the opportunity to connect at 0.45ohm, 0.9ohm, and 1.8ohm. Here's proof of half(ish) ohm, although I didnt use this low of a resistance for data collection:
So this connection would be 1.8ohm
This connection would be 0.9ohm
Here's the 73Ah K2 cells (not JY collaboration batteries)
The day before testing, I topped off all the batteries, including the JYP's in the back and the AGMs to the right.
24 hours later, I actually took measurements.
Data for the lithiums:
Data for the D3400R AGM
Looking forward to some comments, suggestions, etc. Thanks for looking!
Its time to refresh this build log! Been a busy summer with Slam, Heatwave, Photobucket took a sh*t, sold my other car, etc etc.
Here's some pics from the last build log, since the PB pics arent visible anymore:
Cant fit more tire in this car. Bass squat.
But that flush tho
The plans have changed a little bit, no wall but two 12's now
The reason for making this new thread.
Old thread https://www.stevemeadedesigns.com/board/topic/205731-my-first-audio-build/
Still a lot more to deaden!
Btw i've used Silent Coat and STP ak04 premium
So the new plan(setup) will be as following:
HU: ?? don't know yet
Subs: 2 Phoenix Gold Elite.12D4
Subs Amp: Rockford Fosgate Power T2500.1
Mids and Highs: Phoenix Gold Elite.65CS Components
Mids and Highs Amp: Rockford Fosgate Power T400.2
Ground Zero GZBP 12.3500X battery under the hood
XS Power XE 12-110 battery in the back
180 Amp Alternator
OFC 0 awg power/ground/big 3
OFC 4 awg power/ground
OFC 8 awg subwoofer wire
OFC 10 awg speaker wire
Rockford Fosgate Fuses
Rockford Fosgate Fuseholders 6x
Rockford Fosgate RCA’s 10feet 2x
Rockford Fosgate PEQ remote controller
Some dual inputs
I'm now waiting on the 0awg and 10awg OFC wire to come thru the mail, then its all complete..
Box is finished just need to wrap it.
Thanks to JOE X for the box design!!
It's for 2 zv4 12's but i'm hoping it will work fine with the Elite.12's
You'll be hearing from me soon, as soon as ive done some more work
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