Kdaj dodati drugo baterijo za avtoavdio?

Užitek ob poslušanju glasbe se lahko hitro pokvari, ko prižgete motor in ugotovite, da je akumulator prazen.

Na žalost je običajna prazna baterija pogosta težava zmogljivega avtomobilskega zvoka. Ena od rešitev za odpravo te težave je dodajanje dodatne baterije v vaš avto. Toda kdaj bi morali dodati dodatno baterijo za avtoradio? Ugotovimo.

Če imate avtomobilski avdio sistem z zmogljivim več ojačevalnikom ali poslušate avtomobilski avdio z ugasnjenim motorjem, morate v avtomobil praviloma dodati drugo baterijo. Potrebovali boste tudi dodatno baterijo za avtozvok, če se udeležujete tekmovanj z avtoradiom, da zagotovite dobro delovanje sistema.

V spodnjem članku vam bom pokazal več o baterijah za avtozvok in o tem, kako bi morali namestiti svojo.

Kdaj potrebujem dodatno baterijo za avtoavdio sistem?

Ali potrebujete drugo baterijo za avtoavdio ali ne, je odvisno od vašega avdio sistema in moči, ki jo potrebujejo vaši ojačevalniki.

Preprost način, da ugotovite, ali potrebujete drugi akumulator za vaš avto, je, da preverite žaromete. Če se med predvajanjem glasbe žarometi zatemnijo, to pomeni, da vaši ojačevalniki porabijo več energije, kot jo lahko proizvedeta alternator in baterija.

Ne pozabite, da je bila vaša serijska baterija zasnovana za zagon vašega motorja in za delo s standardno električno opremo v vašem avtomobilu, zato dodajanje močnih ojačevalnikov v vozilo poveča skupno obremenitev vašega električnega sistema.

Koliko energije zdrži moja serijska avtomobilska baterija?

Obstaja preprost način, da ugotovite, kako dolgo lahko poslušate glasbo v avtu, preden se baterija izprazni.

Spodnji izračun prikazuje, kako dolgo lahko poslušate glasbo, odvisno od amperaže baterije in moči ojačevalnika.

Če imate baterijo 90 AH in 1800 W RMS ojačevalnik, je izračun videti takole:

10 x 90 / 1800 =0,5 h

Z drugimi besedami, baterija 90 Ah bo lahko napajala vaš 1800 W ojačevalnik pol ure, preden se izprazni.

Glede na zgoraj navedeno, če želite glasbo poslušati dlje časa z ugasnjenim motorjem ali imate močnejši ojačevalec, morate v svoj avtoavdio sistem vgraditi dodatno baterijo.

Prav tako lahko hitro ugotovite, koliko amperaže potrebujete za vaš avtomobilski avdio sistem z uporabo spodnje formule desno od Ohmovega zakona:

Tok (I) =moč (P) / napetost (E)

Vzemimo zgornji ojačevalnik 1800 W, ki deluje pri standardnih 14,4 V.

1800 / 14,4 =125 amperov

Toda ojačevalnik ne deluje s 100-odstotno učinkovitostjo, zato morate 1800 W deliti s povprečno 70 %.

Dejansko mora vaš ojačevalnik za dobavo 1800 W iz baterije prejeti 2571 W.

Zamenjajmo zdaj 1800 W z dejanskim 2571 v izračunu:

2571 / 14,4 =178,54 amperov

To je dejanska jakost toka, ki jo potrebuje baterija za vaš 1800 W ojačevalnik, vendar to še ni konec.

Večina standardnih avtomobilskih električnih sistemov za delovanje porabi približno 60 amperov, kar je treba prišteti skupni porabi.

178,54 + 60 =238,54 amperov

Če želite v svoj avto namestiti 1800 W ojačevalnik. Vaš električni sistem mora zagotavljati konstantno skupno 239 amperov.

Ali potrebujem dodatno baterijo za svoje naročnine?

Moči nikoli ne morete imeti preveč, kar velja tudi za avtoavdio sistem. Nizkotonci so najmočnejši elementi katerega koli avtomobilskega zvočnega sistema in tudi če nimate močnega ojačevalnika za zvočnike, sem prepričan, da ga imate za napajanje nizkotonca.

Potrebujete dodatno baterijo za vaš sub, še posebej, če ima moč več tisoč vatov. Poleg tega, če ste namestili sistem za profesionalna tekmovanja, morate zagotoviti, da se sistemu dovaja ustrezna količina energije.

Ali lahko za avtoavdio uporabim navaden avtomobilski akumulator?

Baterija za vaš avtomobilski avdio sistem deluje na enak način kot katera koli običajna avtomobilska baterija, vendar namesto da bi napajala vso elektroniko vozila, napaja samo radio in ojačevalnike.

Velika večina običajnih avtomobilskih akumulatorjev so svinčevo-kislinski akumulatorji. Čeprav so ti akumulatorji najbolj priljubljeni v avtomobilih, zahtevajo redno vzdrževanje.

Redno boste morali preverjati nivo vode v vsaki celici in če je prenizek, morate dodati destilirano vodo. V nasprotnem primeru se lahko ta baterija trajno poškoduje.

Druga pomanjkljivost svinčeno-kislinskih akumulatorjev je, da radi nabreknejo, tako da, če imate odlično končno obdelavo avdio območja vašega avtomobila, zadnja stvar, ki jo potrebujete, je voda ali vlaga.

Za avtoradio lahko uporabite običajno baterijo, kar je običajna praksa. Vendar pa bo namestitev AGM ali litij-ionskih baterij z večjo zmogljivostjo sistemu prinesla več koristi kot navadna svinčeno-kislinska baterija.

Edina pomanjkljivost pri nameščanju dodatne baterije za avtoavdio je, da lahko druga baterija povzroči težave serijskemu alternatorju.

Medtem ko dodatna baterija podpira zvok vašega avtomobila, dejansko deluje kot dodatna obremenitev vsakič, ko motor teče, in porabi več toka, kot ga lahko proizvede standardni alternator.

Zato je zelo priporočljivo (ne samo jaz), da nadgradite svoj standardni alternator vsakič, ko se odločite dodati drugo baterijo avtoavdio sistemu. V nasprotnem primeru lahko najdete prazno, ne eno, ampak obe bateriji.

Ali so baterije AGM dobre za avtoavdio?

AGM baterije so najboljša izbira kot druga baterija za avto avdio sistem. Zaradi nizkega notranjega upora AGM, hitrega ponovnega polnjenja, zapečatenih in brez vzdrževanja najbolje delujejo za avtoavdio.

AGM akumulatorji so odlična rešitev za vrhunske in napredne avtozvočne sisteme. Zahtevajo znatno moč in imajo daljšo življenjsko dobo kot večina avtomobilskih akumulatorjev s kislinskimi celicami.

A ne samo za avtozvok, ampak lahko namesto katerega koli tovarniškega akumulatorja vgradite tudi AGM akumulator. Akumulator AGM bo dal vozilu več moči za zagon v hladnem in večjo odpornost na vročino in tresljaje.

Edina slabost AGM akumulatorjev je njihova izpraznjenost, ki ne sme biti večja od 50 %, medtem ko lahko svinčeve akumulatorje izpraznite do 80 %. Z drugimi besedami, to pomeni, da lahko svinčeno-kislinska baterija z vsakim polnjenjem deluje dlje kot AGM.

Zato je priročno imeti akumulator AGM napolnjen doma čez noč in se prepričati, da je popolnoma napolnjen vsakič, ko zapustite hišo.

Kakšne velikosti druge baterije za avtoavdio naj kupim?

Velikost druge baterije za avtoavdio je odvisna od tega, koliko moči potrebujejo vaši ojačevalniki.

Splošno pravilo je, da potrebujete 100 Ah baterijo za vsakih 1000 vatov RMS vašega avtomobilskega zvoka.

Spodnja tabela prikazuje nekaj primerov priljubljenih baterij z močjo RMS, ki lahko podpirajo poleg standardne elektronike v avtomobilu.

CCA	Ah Max	Moč ojačevalnika (RMS)
410	45	164
550	100	364
730	115	419
760	120	437
850	140	510
900	160	582
950	190	692

When looking at the battery label, you will not always see both the CCA or Ah values. To calculate the rough estimation of the Ah of your battery, you can take CCA and divide it by 7.25.

Where to Place an Extra Battery for Car Audio?

Most factory car batteries are installed under a hood, but there is not enough room for the second one in the engine compartment.

Additional car audio batteries should be placed close to the amplifier, and the most common places are either inside the cabin or in the trunk.

Batteries installed inside the car should be leak-proof and vibrations resistant, and this is another reason why you should not use standard lead-acid batteries for car sound systems.

If you install a battery close to the powerful subwoofers that make many strong kicks, the vibration resistance is crucial. If you mount the battery in the other than factory position or even on its size, its leaking proof is mandatory.

Which Additional Accessories Do I Need for Car Audio Battery?

When installing an additional battery for your car’s sound system, you need to ensure it works at its optimal performance. To do that, you need to use some high-quality accessories:

Terminal clamps

Terminals made of either copper or gold will prevent connections from any corrosion and avoid voltage dropping.

If you are adding a second battery, do not use old terminals from the acid lead battery, but install clamps with multi-connection points instead.

Power and ground wires

Power and ground wires used for a second battery should have the same gauge as the other power wires used in the car audio.

Remember never to use ground wire that is smaller (thinner) than the power wire. For example, if you use a gauge 4 of the power wire, use the same gauge 4 for the ground wire.

I have been using for a while KnuKonceptz OFC wires , and they work really well.

Battery Isolators

Battery isolators are used to disconnect both batteries from each other when the engine is off. This will keep your start-up battery able to start an engine even if your second battery is drained.

Fuses

It does not matter which secondary battery for car audio you use. Fuse on the power wires is mandatory.

There are many models and amperage versions, but remember to use one fuse on the power wire between batteries and another between the secondary battery and amplifier.

Distribution Blocks

Distribution blocks are needed to connect several power and ground wires to the same battery terminal and are mainly required on the secondary battery.

You will have at the positive terminal input power wire from the main battery and output power wires to the amplifiers, so at least two solid and thick wires in the same place.

Wire connectors

Power wire connectors are as important as high-quality terminals, although they are not required for every battery or amplifier type.

If you do not use a proper size for either battery or amplifier, you risk sound quality because they can become the weakest points with the most resistance.

How to Install a Second Battery for Car Audio?

How to wire an extra car audio battery depends on the type of battery used and if it is the same battery type as your primary or a different one.

The simplest way to connect a second battery is when it is the same type as the primary one and is placed, for example, in the trunk.

However, if you add a second battery that is different than a start-up battery, you have to charge them separately to the same voltage level before connecting to the same circuit.

The new battery still has to be connected to the alternator, but you cannot wire both batteries together if they have different charge levels and, therefore, will supply different voltages. This will kill a weaker battery.

To wire the second battery, you should use the thickest gauge wires you can. If you have to use gauge zero for both power and ground, do it.

Also, try to place the extra battery close to the amplifier and make wiring connections as short as possible.

If your second battery is a different model, size, capacity, or technology than your primary one, the installation is more complicated, and you will need additional equipment to make it work.

Connecting a second battery in the car, you start by running the power wire from the alternator to the place where you will install the battery. If this is a trunk, then you have to run a power wire through the entire car.

On the power wire, close to the second battery, you have to place the fuse, and it is a good practice to add a second fuse of the same size close to the alternator.

Next is the direct wiring from the fuse in the tunk to the positive battery terminal. Make sure that for all connections, you use wire of the same size (gauge).

Another wire from the positive battery terminal you connect with the power terminal in the amplifier. On this wire, you also have to add the fuse, so you will end up having two fuses in the trunk, one between the amplifier and the battery and the second between the battery and the alternator.

Now the ground wire from the amplifier and another one from the second battery. Here, you have two options:run a short wire to the chassis bare metal or directly to the battery.

Using a chassis to ground the wires allows you to use shorter wires, but the disadvantage is that in some cases, especially in older cars, the chassis can have high electrical resistance and limit the quality of the current flow.

Because of that, I prefer to have a direct wire connection for both power and ground wire directly with the battery and not through the car’s chassis.

To summarize, wiring from the second car battery is as follow:

• Two wires with fuses from the positive terminal. One goes to the amplifier, and the second connects with the alternator.

• One wire from the negative terminal. It goes either to the chassis or to the main battery’s negative terminal.

How to Charge the Second Battery in Car?

There are a few ways to charge your second battery, and all of them are straightforward.

The easiest is using the alternator from the engine to charge your second battery when traveling on the road and using a voltage sensing relay (VSR) or an isolator switch in the SCA dual battery kit.

Another way to charge a second battery for car audio when the engine is off is to use a solar battery regulator.

The best is a DC to DC Charger with solar input. This is the more efficient way to regulate the input to your battery from both sources without damaging the battery over time.

All the above devices allow both batteries to charge while the vehicle is running and isolate the batteries after switching the engine off.

This way, you will keep your starting battery at full charge, while the second battery will power your amplifiers.

Can I Run Two Batteries on One Alternator?

You can run two batteries on the same alternator because alternators protect against excessive current drain and are not affected by multiple batteries.

When you connect the batteries, the voltage in the system equalizes, meaning that the lower voltage battery sucks power from the other.

If your batteries are the same type, the alternator sees your main and an extra battery for car audio as a single large battery and charges them the same.

The batteries self-regulate the amount of current they take as they charge. Therefore, you can use the same alternator for several batteries, but one additional battery is installed in most car audio systems.

Zaključek

Installing a second battery is straightforward, and it does not take much time.

When you need to add a second battery to your car audio system, it is worth looking at the AGM batteries.

They are the best choice because of their low internal resistance, fast recharge. AGM batteries are also fully sealed and maintenance-free. In addition, they can be installed in any position, unlike standard wet cell batteries that can be placed only vertically.