For successful charging of the maintenance-free battery the primitive chargers made in the Celestial Empire or in the garage with your own hands from an old transformer will not work. Ideally, you will need a unit that supports these functions:
- automatic maintenance of the charging voltage at the level set by the user;
- The current voltage and current data should be shown by instruments or on a digital display;
- work in a cyclic charge / exposure / discharge mode, which contributes to the desulphation of the lead plates.
If you plan to work with the battery in the garage you don’t have to remove it from the car. Before you charge an unattended car battery with a battery charger, you will have to disconnect the terminals of the onboard network. This will reset the controller errors and user settings. No big trouble here, just some inconvenience. Then proceed as recommended:
- Connect the charger cables to the power supply, making sure that they are connected in the correct polarity. Usually “-” and “-” signs are stamped on the alligator clips directly on the serial units.
- Check the voltage delivered by the battery. If it is below 11 V, you are dealing with a useless and completely discharged battery, and it is practically impossible to repair it.
- To begin with you set the voltage 12,6 Volt, switch on the device for charging and watch the process within 30-60 min. Jumpy ammeter readings, as well as the rapid boiling of the electrolyte indicate a high probability of internal short circuit in the battery. You will have to stop charging and think about buying a new source.
- If this does not indicate any problem then increase the voltage to 14,4 Volt. As you charge, the current will gradually decrease. Refer to the lower limit of the ammeter reading of 0.5-1 A, at which point the charge must be stopped, otherwise the electrolyte will boil. That’s the end of recovery procedure.
To reach the lower limit of 0.5-1A current consumption, it usually takes 5-6 hours, at worst up to 1 day. There is no need to rush with charging and raise the voltage, 14.4 V is the optimal value, and the maximum is 15.6 V.
In order not to damage the maintenance-free car battery, do not exceed the threshold of 15.6 volts during recovery, and do not use devices without voltage control.
It is desirable to perform such preventive recharging once a month, but not less frequently than once every six months. If you have a fully automated device with desulphation function (and such have been produced since Soviet times), it is not necessary to be present during charging, it is enough to visit every 2-3 hours.
The battery is deeply discharged when its capacity is completely used up. The longer it stays in this state, the greater the damage to the active plate material becomes. Sulfation will then begin to occur and recharging becomes impossible. This damage is irreversible.
If the battery is left in a discharged state for a long time, a chemical reaction known as sulfation will begin, which reduces performance. Lead sulfate is generated on the positive and negative plates and distributed evenly among them during the discharge process.
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- The long interval between recharges.
- Sulfation interferes with the chemical reaction between the acid (electrolyte) and the active material consisting of lead on the plates, and this interferes with the normal operation of the battery.
- Even after recharging, the voltage will be low ( 12, 4 V), but usually the cells show equal values.
Sulfation is not a manufacturing defect.
If the driver knows how to charge the car battery, he will not waste time and money in an emergency situation, and the car battery will have a long life. If the motorist is careless, he or she risks destroying the battery and electronic equipment in the car. It is important to always take precautions and use the equipment according to the factory instructions.
Maintenance of Mutlu batteries
Different types of batteries are produced under this brand name, from traditional to completely maintenance free. The traditional and hybrid types, those for which the cover can be removed and water refilled, require more frequent recharging and periodic replenishment of lost electrolyte. Maintenance-free batteries need to be recharged as needed.
All batteries require careful handling by the owner:
- Avoid deep discharges and storing in a discharged state;
- Avoid jolts and shocks to the enclosure;
- clean the enclosure, in particular the ventilation openings and contacts, of any dirt;
- remove oxidation from the terminals.
Before long-term storage, it is better to fully charge the equipment and remove it from the car and place it in a place where the temperature is not too high.
How to charge a Bosch vehicle battery
As with all products from the German company Bosch, batteries are reliable, technologically advanced and of high quality. Bosch batteries must be charged with extreme care to avoid overheating the electrolyte.You will needGuidanceIf the battery is discharged, remove it and try to charge it in a warm place. Determine in advance the capacity of the Bosch battery, which is indicated on the housing.
If it is of normal construction with acid electrolyte, set the charger to a current of no more than one tenth of the battery capacity when charging. For example, if you want to charge a 65 amp-hour battery, set the charger to a charging current of no more than 6.5 amps.
Make sure, however, that it does not overheat. Remove the battery covers. If the electrolyte boils in it, the battery can permanently fail. 10 hours must elapse before the battery is fully charged. A special feature of modern car batteries from Bosch is that many of them are helium batteries. The electrolyte in the jars of such a battery is in a condensed state. Such batteries are more environmentally friendly, easy to service, have higher capacity. A special valve system allows excess gas to be vented. But when charging avoid overheating the gel, otherwise the battery is sure to fail.With a sealed helium battery, the charging current is set at 2.5% of the battery capacity and will take longer to charge. For a 65 amp-hour battery the charging current is 1.625 ampere and the charging time is 40 hours. Be sure to monitor the temperature of the battery banks at all times. If you allow the gel to turn into liquid, the battery will fail. So unless you need to charge as fast as possible, use as low a charging current as possible.
If the charger is equipped with a fast-charge function, it can only be used on batteries with liquid electrolyte. But even these must not be charged continuously in this way, as it reduces the lifetime of the battery. This is absolutely not permitted for helium batteries.
Batteries are available in four series: Bosch S3 economy batteries, Bosch S6 AGM Hightec car batteries, Bosch S5 Silver Plus and Bosch S4 Silver car batteries. With a range like this, you can choose a Bosch battery for just about any vehicle.Useful TipThe three new Bosch battery series S3, S4 Silver and S5 Silver Plus together form a comprehensive program of tailored solutions for every vehicle. these batteries fully meet the high demands of the world assembly line for the main electric parameters: the cold start current and the battery capacity.Print outHow to charge a Bosch car battery
Design of S5 AGM technology
12 V starter battery consists of 6 separate cells housed and connected in series. The cell is the smallest electrochemical unit. It has no individual container, and the contacts are connected to adjacent parts of the structure by soldering. Each cell contains a cell, which consists of a set of negative and positive plates, separated by a separator. a microporous insulating filler, installed between the dissimilarly charged plates. The electrolyte is an aqueous solution of diluted sulfuric acid. It permeates the pores of the plate and separators and fills the voids in the cells. Terminals, connectors and plates are made of lead. Thermal sealing design is used for battery integrity and provides excellent performance. Improper use leads to battery failure.
The main causes of rapid failure:
- The light is on when the car is parked.
- Auxiliary battery-powered heating.
- Defective alternator.
- Voltage regulator malfunction.
- Control unit error.
- Additional electrical equipment installed.
- Installing a battery that does not match the car’s data sheet.
- Frequent machine stops.
- Overloaded connected power: radio, TV, DVD, cooling units.
- Short circuit / dead cell.
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