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Can deliver a specific programmable ‘charging profile’ to the batteries. No, charging the battery from home should not damage the alternator. rev 2021.4.23.39140. If the alternator put out a voltage above this range it would risk damaging the car battery. This may be in line with the advice you were given. The video in this blog highlights these lithium challenges and shows you what can happen when things go wrong – namely alternator overheating, smoke and an expensive alternator replacement, not to mention the risk of a battery thermal event. It's intended to maintain the charge on a good battery. Were kamikaze pilots an effective strategy for Japan? A battery charger, or recharger, is a device used to put energy into a secondary cell or rechargeable battery by forcing an electric current through it.. Would you mind expanding this answer a bit? In addition, automatic over-voltage circuit protection is recommended for your charging system. Do not know if it will damage an alternator , but I have read it can cause havoc with the vehicle electronics . By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. Even so, things can go wrong, and one of the most common problems can leave you stranded, that being a bad alternator. In some cases, however, the alternator can actually drain the battery, causing significant problems. Replace or swap regulator only? What is a word/expression for useless advice? In realistic terms, the alternator itself is constantly charging the battery (except on certain newer vehicles where the alternator shuts off to save fuel), so there is no harm in it. Asking for help, clarification, or responding to other answers. Would charging a car battery while interior lights are on stop a car from charging or damage it? Environments that are usually hot will drain the battery power quicker, so it may be 2 years for you in these cases. Fortunately, most of them become evident when you are driving a car, so you don’t need to use high-priced scanning equipment. You can conveniently measure the voltage by connecting a voltmeter to the battery when the engine is off. If the battery is dead, then it will not be able to provide the alternator with any power. There are several things that signify the poor work of an alternator. That said, you should check your owners manual to see what it says. If your battery is dead, and you charge it with your alternator, you can damage your alternator. Manga where the protagonist saves his two friends, but in doing so, winds up trapped in a cave fighting monsters for ten years, Multiple Wire.write() not working for Arduino Nano I2C. What does the 'battery' light on the dashboard actually mean? Don’t rely on an alternator to do the work of a ­charger. By: James Phaneuf | Last updated: April 21, 2021. Making statements based on opinion; back them up with references or personal experience. The alternator can't really be relied on to recharge a fully deadbattery. Do all periodic or "natural" sounds contain major chords? Including references would also be good. Figure 9 shows a typical alternator charging system. Using an external charger? This results in a massive charge improvement at the batteries. What do you mean by charge the battery? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Some battery … Expertpickhub.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to products on amazon.com. A failing alternator can overcharge, which will damage the battery. Even though there is no risk of overcharging with the use of a high quality charger, the battery should not remain connected to the charger for more than 24 hours. Believe it or not, but a bad alternator can actually intermittent charge the battery. Is there a way to make a 2009 MacBook (A1342) boot from USB? If your ECU is designed to only handle voltage in between 12V to 14V then in this case it will be damaged. Just be careful to not reverse polarity . Or using the alternator to charge the battery? Vehicle charging systems are not designed to recharge fully discharged batteries and doing so may damage the stator windings or the diodes … Can you use a regular battery charger on an AGM battery? The regulator’s task is to cap the output voltage of the alternator to a safe level both to prevent damage to car electronics and to avoid overcharging the battery during long high-RPM drives. You can assume that there is a battery problem when the reading is lower. It’s true. An extension cable can, however, be fitted to sense the voltage at the battery thus increase the voltage at the batteries. Besides, there are some fragile bearings that require gentle handling. How fast can you charge a deep cycle battery? Test the alternator. Many are wondering how long a battery will last with a bad alternator to eliminate additional expenses. Thanks for contributing an answer to Motor Vehicle Maintenance & Repair Stack Exchange! You’ll need a multimeter or a voltmeter to test it. Yes, very easily. Intermittent Charging. 2.Reverse polarity: Often the maintenence personel at the garage may accedently connect the battery in reverse polarity to your ECU Charging a dead battery with an excessively high voltage can increase the off-gassing of hydrogen, which can, in turn, result in a hazardous situation where the battery … Alternators used to be primitive devices, but now have sophisticated voltage regulators and control circuits that prevent many of the classic scenarios that older mechanics may have told you about (I remember advice my grandfather gave me about 20 years ago, which has become obsolete). Alternatively you can proactively switch to any one of several good 3 stage mains powered chargers and ditch the alternators and their fairly crummy battery care. Bad alternator, or just a regular dying battery? I was told to charge the battery every so often to keep the battery life at a high, does this damage the alternator by constantly charging the battery from a home charging system? Little/no charging but alternator and battery test good. AGMs and gel cells can be tested the same way as conventional batteries. There is however no need to constantly charge it. Have any public figures faced any consequences for breaking pandemic rules, especially their own? If I was an alternator manufacturer, I would put a current limitation to the alternator that would keep it operating within its specs. While car batteries can have an enormous capacity compared to your iPhone, they need to be charged too, which is what the alternator does. The positioning of the regulator varies: in some cars, the regulator may be integrated into the alternator and be inside its casing; in others, … Not every driver is willing to replace an alternator even if he/she notices inaccurate work. These deposits build when a car is repeatedly driven on shorter trips or is left unused. An indignation system in a car largely depends on a battery and an alternator. If the vehicle is being used frequently there's no need to keep charging it at all really as the alternator will keep the battery charged up just fine. If you gotta do it, keep the engine rpm high, this causes the alternator’s cooling fan to force maximum cooling air through the alternator and at high rpm, the excitation current (field current) is low. Step 5: Turn on the battery charger and begin the charge. An AGM battery is bad if it will not hold a charge, take a charge or if it dies prematurely when under load. The charging protocol (how much voltage or current for how long, and what to do when charging is complete, for instance) depends on the size and type of the battery being charged. If this happens on a regular basis and the warning light is on, check an alternator. The temperature shouldn’t affect the alternator, though. battery charger image by Albert Lozano from Fotolia.com. Car battery chargers run off AC power and provide 12V DC at relatively low voltages, which is the best way to charge a completely dead battery. If you’re using a permanent trickle charger or battery maintainer, you can leave it attached full-time as long as you need to. laptops) but not to the lead-acid batteries in cars. Alternator isn't charging battery properly. ... What Can Damage an Alternator. Also, alternators are not chargers. Trickle chargers prevent car batteries from losing enough charge to stop them working. If the battery is frozen, install another fully charged battery until the original battery can be thawed out, fully recharged and tested or tow the vehicle to a heated garage. An indignation system in a car largely depends on a battery and an alternator. Why Korean transcriptions of Japanese words uses the letters ㄱ,ㄷ,ㅈ for initial /k/, /t/, /tɕ/ while using ㅋ,ㅌ,ㅊ for other languages? Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Can boost sub-optimal voltage to a level needed to charge batteries to 100%; Some models of DC-DC Chargers can be run in parallel, … What disease could my time traveler find a definitive 'cure' for, without recognizing the specific disease. You have to remember, alternators are intended to maintain a charge on a good battery. Voltage readings should be between 12 and 13 volts. The most common reason an alternator fails to charge a battery is that one of them is going bad. When an alternator tries to charge a dead battery it must work at 100% capacity, but an alternator is designed to work at 100% for only short periods of time due to the heat it produces. Can a bad alternator kill a new battery? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Frankly speaking, this period can vary depending on many factors, but I highly recommend getting a new alternator unless you want to spoil a battery as well. You can damage an alternator by charging a dead battery with it. If you want your alternator to work flawlessly for a long time, you need to keep it clean. To learn more, see our tips on writing great answers. Does charging the battery on a regular basis damage the alternator over time? Battery conditioners restore the capacity of lead acid batteries by targeting lead-sulphur deposits which reduce the battery’s ability to hold charge. The two key issues … The former is responsible for starting a vehicle and distributing power across elements of an electrical system while you are driving. By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Find out how to test an alternator. The best answers are voted up and rise to the top, Motor Vehicle Maintenance & Repair Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. If you think it could be your battery that is at fault, the typical lifespan of a battery is between 2 and 5 years. Hope that helps? It's intended to maintain the charge on a good battery. Term for neologisms created to distinguish between new and old technologies, Is it affordable and reasonable to create a tub using tile. Actually, automotive lead acid batteries benefit from complete discharge with moderate current and immediate recharge once per year. If you can easily start your car, but every time you do it, the warning light is flickering, the chances are high that you need to replace an alternator. Glad you could join us. Challenges when charging lithium with an alternator. You can usually get away with charging a completely dead battery with your alternator. An automotive alternator is a device that converts power from the engine into electricity, which is used to charge the car's battery. Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. How does charging the dead battery damage the alternator, and why? But when the battery voltage is low, the resulting magnetic field within the rotor will also be lower, and as such the alternator output will be lower. If you tend to drive at night and you’ve noticed that the headlights became dimmer, there may be problems with an alternator. A battery should be able to provide you with at least 5 years of reliable service before it starts to fail. The alternator isn't designed to recharge a dead battery. Connect and share knowledge within a single location that is structured and easy to search. But this source also needs to be refilled. You could minimise battery wear by using a trickle charger when this happens, obviously, but compared to many of the other forms of battery damage, doing this a few times a year when you need your car boosted is marginal. When this does happen, the alternator begins to run hot, and this is what kills the alternator. No, charging the battery from home should not damage the alternator. How do we know what the atmospheric pressure on Mars is? If something happens to your alternator and fails to perform its initial role, a battery doesn’t get the needed charge while driving. How many hours will a deep cycle battery last, Do deep cycle batteries need special chargers, How long does it take to charge AGM battery, Do you need a special charger for AGM batteries, What voltage should I charge my AGM battery. When an alternator overcharges the battery, it will result in an excessively high voltage, and this will end up in a premature cell. … Can you provide evidence to back up your statements? However a very common problem is deep cycling starting batteries which can occasionally be happening without your knowledge. The alternator isn't designed to recharge a dead battery. Run that battery down far enough (under about 10v) and either the alternator won't recharge it, or it will damage the cells and give them a surface charge that will draw off so fast that it makes the charge useless. An alternator is rather a simple element that consists of several moving parts. If you click a link on this page and make a purchase, we may receive a small commission at no extra cost to you. With lithium batteries, we have a great source of power. Would a duct tape spacesuit be practical? Any strange lights flickering on the dashboard may also be caused by a damaged alternator. Lead-acid batteries are happiest when they have a constant current trickling through them - a regularly-used vehicle may never need its battery replacing, my Ford Fiesta had its original battery from 1999 when it was written off in 2012. Causes of 2012 Honda Civic alternator not charging battery unless headlights are on. There is however no need to constantly charge it. Related: Symptoms of a Bad Alternator. Welcome to mechanics SE! We're glad to see you here. It is always best to charge a dead battery with a battery charger prior to putting an alternator into operation. The latter provides a battery with a continuous charge required for replacing the energy used. A maintenance cycle on a smart battery charger can bring it back almost as good as it was. improving the performance slightly in the event of long cable runs. When this does happen, the alternator begins to run hot, and this is what kills the alternator. 5 / 5 1 rating. Revving your engine won’t charge your car battery any faster than letting the car idle. Most cars automatically shut down systems that consume much power (airbags, ABS, and the like) to deliver the biggest portion right to the engine. Can regulate amperage making system planning easier and decreases wear and tear on the alternator. Q) The indicator light is on. … Besides, if the battery is dead (as in won't accept charge), no amount of charging is going to save it, and the current should be so small that it eliminates the theoretical possibility that the alternator will overheat. There should be no problem charging a battery with the cables attached. I have done it many times. Could installing a 12V radio on a JDM Simpa damage the battery and alternator, causing the alternator to put out no charge? A full discharge and recharge is beneficial to certain types of battery (e.g. When an alternator goes bad, there is a chance it can overcharge the battery. Make rainbow-coloured bullets to show points. For the health of your battery and car, replace the alternator as soon as possible once it has failed. Does Starship reuse actually serve a purpose for Mars, or only LEO/Earth-to-Earth? Step 6: When the charge is finished, turn off or unplug the charger and remove the clamps in reverse order (black first, then red). Deep-discharging kills lead-acid batteries, and you may find if your battery runs flat, it won't hold as much charge, and begins to slowly degrade past this point. Any lead acid battery can go bad for the same reasons but the rate at which they succumb to these reasons will vary based on the type (flooded, Gel, AGM) that you have. An alternator typically can last longer than a battery, with an average lifespan of 7 years. Your car’s alternator is designed to provide a specific voltage to the car battery (13.6 to 14.6 volts). Why are cockpit alarms still so distracting and unable to be silenced? We will have a premature cell failure because of a bad alternator. Just storing a battery in different states of charge can greatly affect it's life. Battery chargers Can a bad alternator destroy a new battery. A full charge is usually achieved by charging … In a nutshell, it is a small electromagnetic system, which is prone to damages caused by dust and dirt. If this weren’t true, the people who make battery chargers would be out of … Lithium batteries also have the potential to damage the alternator since most alternators are made for lead-acid batteries. Your alternator translates mechanical energy into the potential energy that’s stored in your battery by a spinning pully. An alternator is rather a simple element that consists of several moving parts. If the vehicle is being used frequently there's no need to keep charging it at all really as the alternator will keep the battery charged up just fine. @SopuruOfoegbu A substantial percentage of vehicles on the road still use shunt-based alternators, which run at 100% output all of the time. I presume that's what the alternator manufacturers do. Our primary source for charging the batteries will be solar panels. An undercharging alternator will leave the battery flat, which speeds up its failure. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new … Proper and regular use of battery chargers can therefore increase the reliability and the service life of the battery. Fixing your battery or alternator can … If a battery is discharged to the point that it cannot start the vehicle, use a charger as soon as ­possible to make sure the battery gets fully charged. By: James Phaneuf | Last updated: April 21, 2021. Can a bad alternator destroy a new battery. A battery that simply will not accept charge won't necessarily cause premature failure of the alternator unless it is permanently at a low voltage, in which case see the 'shorted' section above. Should I Replace or Rebuild My Alternator? Welcome to the site. However, this is not a good idea because it could damage the electrical system of your vehicle and cause greater problems. In academic paper, is that a really bad thing to not report the relatively not good result? That's not to say they can't burn out if they're overloaded, and charging a dead battery can draw quite a lot of amps, but the scenario is very unlikely and would probably require the alternator to be failing anyway. Just what does the word "canon" mean when referring to anime? In this charging state the battery voltage can go upto 17. It only takes a minute to sign up. FAQs. Some may recommend running the engine with the negative battery cable disconnected to test the alternator. using alternator to charge dead battery can damage the alternator, using home system can not damage the alternator. With the alternator to battery charger we do the reverse.