YOUR AUTOMOTIVE BATTERY: More than you wanted to know.

General tech discussion board for Insane Audio's JK1001, FJ1001 and other Android based head units (coming soon)!
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Mike
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Joined: Thu Jan 29, 2015 3:59 pm
Location: El Paso, Texas, USA.
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YOUR AUTOMOTIVE BATTERY: More than you wanted to know.

Post by Mike » Sun Jul 24, 2016 8:06 am

There is a thread in another part of the forum covering battery draining issues. That is, the vehicle battery going dead after the installation of the JK1001 and the vehicle being parked for a few days. TO BE CLEAR, this issue appears to happen ONLY to a small number of installations with certain "extras" in the JEEP line. It has been a perplexing problem because it is an intermittent thing. It only happens periodically, and very unpredictably. You cannot fix what you cannot find. The Insane Audio Support dudes, myself, and others have put hundreds of hours into monitoring and testing this issue, using some pretty technical methods and equipment. The support dude's tenacity in chasing this difficult problem has been amazing! They deserve a lot of credit here.

http://www.insanejeepaudio.com/forum/vi ... f=24&t=632

My qualifications in this issue: I have been a licensed radio operator since the age of 8, I have 15+ years of experience in Army Ordnance Corps Electronics, I am internationally certified as an electronics technician, I have a Journeyman's license in Industrial electronics and 15+ years in power plant electronics and controls, and recently I became nationally certified to control the U. S. power grid with 5+ years running the western grid. AND - I own a 2015 JEEP wrangler Unlimited Rubicon HARD-ROCK with the upgraded ALPINE sound system.... one of the lucky few.

What does all that mean? It means I really don't know shit. BUT I know how to find what I want to know, and how to use good test equipment. And I decided sharing this research might help others, or at least provide some interesting reading.

If you get nothing else out of this, perhaps this initial chart will allow you to get an idea of the health of your electrical system. These numbers are approximate, and will (and should) be adjusted for temperature. There will be other factors to cause anomalies to your readings too. HEAT is a natural enemy of your battery. If a battery is hot, charging, float-charging and operating voltages should be reduced for best battery life. I live in the desert, this is good to know.

MOST (but not all) vehicle batteries are of the Lead-Acid design. This is one of the oldest and most reliable designs, and still has many advantages over the more modern chemistries for vehicle operations. This chart covers the basic nominal parameters for a vehicle battery.

Parameter: - - - - - - - - - - Desired Value.
Nominal Voltage: - - - - - - 12.00 vdc. (considered the minimum working voltage).
Fully Charged Voltage: - - -14.70 vdc. (my charging system initially runs about 14.4 v after the initial start).
Float Charge Voltage: - - - 13.80 vdc. (my charging system typically runs about 13.7 v after the initial recharge phase).
Resting Voltage: - - - - - - - 12.60 vdc. (my battery holds about 12.4 to 12.6 v overnight, which is good).
Dead Voltage: - - - - - - - - -10.50 vdc. (you do not want to ever leave your battery at this level).

I was interested in the resting voltage of a healthy lead-acid battery. As you may notice in the battery draining thread, my battery is currently resting at 12.60 vdc now, after determining what the most recent change to the JK1001 installation was. I will continue to monitor my battery voltage, especially if the JEEP gets parked for an extended period. At some point I will discover an additional problem, or decide the final issue was the last item the Support dudes discovered. Time will tell.

SOME BATTERY TIPS. According to some automotive clubs, the automobile battery is the single largest point of failure in the modern vehicle. Over 50% of the calls they receive are for battery problems. That is more than three times as frequently as the next biggest problem, the flat tire.

Being a licensed ham radio operator as well as an electronics professional, I do use a lot of battery power. and when I have battery questions, there is one site I turn to. BATTERY UNIVERSITY. It is easy to get lost in this site. In fact, I often find myself going there for a specific answer, and two hours later I realize I got side-tracked on some other interesting thread about batteries. I in particular like the Li-Fe-Po4 battery chemistry for portable radios.... ANYWAY:
http://batteryuniversity.com/

The real truth is that while you can do a lot to prolong the useful life of your vehicle battery, there is no EASY way to accurately predict the point where your battery will fail. Treating it with care will give it a good long life. Mistreating it will shorten its useful life, perhaps greatly. But each time you start your vehicle, you draw a little more of its useful life out of it. One day it will no longer contain enough capacity to start your vehicle, and you will need to replace it.

Out of the hundreds of articles and thousands or words here about batteries, these threads should be of the most interest for vehicle owners. If you don't want to read further, these three tips will probably take care of 90% of any electrical issues your vehicle will ever have.

#1. KEEP YOUR BATTERY CONNECTIONS CLEAN.
#2. KEEP YOUR BATTERY CONNECTIONS TIGHT.
#3. KEEP YOU BATTERY TOPPED OFF WITH DISTILLED WATER. (Even maintenance-free batteries may have filler caps).

Well, ENOUGH of me. If you quit reading here, you probably know more now about your vehicle battery than 99% of drivers already. If you are curious to learn even more, read on. And may I wish you many happy and safe years in your JEEP.

Mike -- El Paso, Texas. HAM OP: KD5KC.
----------------------------------------------------

Getting to know the battery.
http://batteryuniversity.com/learn/arti ... he_battery

Battery Definitions.
http://batteryuniversity.com/learn/arti ... efinitions

Summary of lead-based batteries.
http://batteryuniversity.com/learn/arti ... _batteries

Lead based batteries.
http://batteryuniversity.com/learn/arti ... _batteries

Charging lead-acid batteries.
http://batteryuniversity.com/learn/arti ... id_battery

Why batteries fail.
http://batteryuniversity.com/learn/arch ... es_to_fail

Prolonging lead-acid battery life.
http://batteryuniversity.com/learn/arti ... _batteries

New lead-acid systems.
http://batteryuniversity.com/learn/arti ... id_systems

---------------------------------------------------------------------------------------------
Mike -- El Paso, Texas.

2015 JKU-R Hard Rock -- The Copperhead.
.

badgerdon
Posts: 1
Joined: Wed May 18, 2016 12:12 pm

Re: YOUR AUTOMOTIVE BATTERY: More than you wanted to know.

Post by badgerdon » Fri Jul 29, 2016 12:14 pm

This is GREAT! I love the indepth study of what powers our rigs. Having taught fundamentals of AC, DC and the like, your research does a nice job of showing how that practical application of batteries that we take for granted works.

Nice work!

User avatar
Mike
Posts: 72
Joined: Thu Jan 29, 2015 3:59 pm
Location: El Paso, Texas, USA.
Contact:

Re: YOUR AUTOMOTIVE BATTERY: More than you wanted to know.

Post by Mike » Sat Jul 30, 2016 6:08 am

badgerdon wrote:This is GREAT! I love the indepth study of what powers our rigs. Having taught fundamentals of AC, DC and the like, your research does a nice job of showing how that practical application of batteries that we take for granted works.

Nice work!
Thank you sir. I earned my first radio license @ 8 years old. This JEEP was a birthday present last year, when I turned 60. Been at it for a lot of years,

Take care, and be safe on the trails.

Mie -- El Paso.
Mike -- El Paso, Texas.

2015 JKU-R Hard Rock -- The Copperhead.
.

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