How to charge a Bosch s4 silver battery

Overview of Bosch S4 silver battery models

On modern cars, more and more often the manufacturer begins to install maintenance-free batteries. There are many recommendations on how to charge an unattended battery, but they are all too complicated and the average motorist does not always manage to penetrate into the essence of the process of charging the battery. In this publication will be considered a simple and at the same time effective way of charging car maintenance-free battery by the example of Bosch silver S4.

Before you begin the process of charging, it is worth determining at once what is the age of the battery. Maintenance free car batteries that are more than five years old, it is a waste of time to charge or resuscitate them. Even if you manage to do something with it, its work will not last long. It is better to take old batteries to the recycling department.

And now about the technical aspects of charging. The charger with which you will be charging should be fully automatic, i.e.е. the charging process should be controlled by a program that you choose. The program itself will be able to control the required charging current, and will provide a constant supply of the desired voltage. It is also worth paying special attention when connecting the charger to the battery terminals. Always attach the red terminal to the. black to minus. If the terminals are not color coded, look directly at the sockets of the charger and make the correct connection.

Remember that charging the battery must be done in a well-ventilated room, because during this process release harmful substances for the body.

And one more nuance, if you charge from time to time only the battery of your car, then the purchase of the necessary charger is an unjustified waste of money, because charging a maintenance-free battery in a specialized center will cost you much cheaper than buying a device.

What to look for when buying a battery?

An ever-increasing amount of electronic equipment in cars and new technologies such as start-stop systems and brake energy recovery systems require highly efficient batteries.

Frequent engine starts quickly deplete any conventional battery.

By comparison, Bosch specific battery models, such as the S5A (AGM) and S4E (EFB), produce far more energy and endure more charging cycles.

Every Bosch battery contains all the expertise of the leader in automotive technology development and kit supply.

Charging procedure

Primitive battery chargers made in the Celestial Empire or from an old transformer in the garage by yourself are not suitable for successfully charging a maintenance-free battery. Ideally, you need a unit that supports these functions:

  • automatically maintains the charging voltage at the level set by the user;
  • The current voltage and current data should be shown by the instruments or on the digital display;
  • work in a cyclic charge / exposure / discharge mode, which contributes to the desulphation of lead plates.

If you plan to work with the battery in the garage, it is not necessary to remove it from the vehicle. Before you can charge a vehicle’s maintenance free battery with a battery charger, you must disconnect the vehicle’s onboard power terminals. This will reset the controller errors and user settings. No big problem here, just some inconveniences. Proceed according to the recommendations:

  • Connect the leads from the charger to the power source, observing polarity. Usually the ” ” and “-” signs are stamped directly on the crocodiles on serial machines.
  • Estimate the voltage delivered by the battery. If it turns out to be lower than 11 V, then you are dealing with a useless and completely discharged battery, it is practically impossible to restore it.
  • To begin with a 12.6V charge, turn it on and observe the process for 30-60 minutes. Jumpy readings of the ammeter and rapid boiling of the electrolyte indicate a high probability of internal short circuit in the battery. You should stop charging and think about buying a new power supply.
  • If you do not observe the above negative symptoms, increase voltage to 14.4 volts. In the process of charging the current will gradually decrease. Be guided by the lower limit of 0.5-1 A ammeter reading, once this is reached the charge must be stopped or the electrolyte will boil. At this point the recovery procedure is finished.
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It usually takes 5 to 6 hours to reach the lower limit of 0.5-1 A, in the worst case up to a day. Do not rush with charging and increase the voltage, 14,4V is the optimal value, and the maximum is 15,6V.

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To avoid disabling a maintenance-free car battery, do not exceed the 15.6V threshold when restoring and do not use devices without voltage monitoring.

It is desirable to carry out such preventive recharging once a month, but no less than once every six months. If you have a fully automated unit with desulphation function (and such have been produced since soviet times), you do not need to be present at the charging, it is enough to visit every 2-3 hours.

Charging procedure

For successful charging of the maintenance-free battery will not suit the primitive chargers made in the Celestial Empire or in the garage with your own hands from an old transformer. Ideally, you need a device that supports these functions:

  • Automatic keeping of charging voltage at the level set by the user;
  • Data on the current voltage and current should be shown either by a device or on a digital display;
  • work in 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, it is not necessary to remove it from the car. Before you can charge the vehicle’s maintenance free battery with the charger, you will need to disconnect the onboard power terminals. This will reset the controller errors and user settings. There is no big problem here, only some inconvenience. Then follow the recommendations:

  • Connect the charger cables to the power supply, making sure that the polarity is correct. Generally the ” ” and “-” signs are stamped on the crocodiles directly on the serial machines.
  • Evaluate the voltage delivered by the battery. If it turns out to be lower than 11 V, then you are dealing with a useless and completely discharged battery and it is practically impossible to restore it.
  • To begin with set the voltage 12,6 V, switch on the device for charging and observe the process within 30-60 min. Jumping readings of ammeter, as well as the rapid boiling of electrolyte indicate a high probability of internal short circuit in the battery. Charging will have to stop and think about buying a new source.
  • If you see none of these negative effects, increase the voltage to 14.4 volts. The current will gradually decrease during charging. 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 the rebuilding process.

Choosing the right battery

Before choosing a Bosch s4 silver battery, customers should verify that the model of the car meets the specifications of the battery. The Bosch S4 battery is suitable for more cars, including mid-range cars with fewer additional features. This differs from the S5 series, which is designed specifically for high-end cars, so it provides power for additional loads such as satellite navigation and other power-consuming options. Recommended: How to put the right battery in the car Every new generation of vehicles has an increasing number of electrical comfort and safety features. The Bosch S4 battery reliably provides a large number of energy receptors. It supports the on-board power grid? thanks to its high power reserve. The manufacturer guarantees 15% more starting power than other comparable models and thus ensures fast and smooth engine starting in any season. It is the best solution for customers who pay attention to the budget price, but at the same time would like to have a branded product.

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The marking is on the battery cover and consists of a set of numbers and letters. How you can read the year of manufacture on it? The first character. a letter. indicates the country of manufacture.

Added: details in a separate article here.

The year of manufacture is encoded in the following numbers. The fourth digit is the last digit of the production year. The fifth and sixth are the encoded month of manufacture. 17. January, 18. February, 19. March, 20. April, 53. May, 54. June, 55. July, 56. August, 57. September, 58. October, 59. November, 60. December.

Have you had or have a Bosch battery? Then tell us in the Комментарии и мнения владельцев about your experiences with it, it will really help other motorists and make the material more complete and accurate.

The charging and discharging process

If a device is connected to the terminals of a lead-acid device, the difference in power between the poles causes electrons to flow. They leave the negative pole and flow through the devices to the positive pole. This flow of electrons converts lead dioxide in the positive plate and spongy lead in the negative plate into lead sulfate. This chemical process consumes sulfuric acid and produces water, and the specific gravity of the electrolyte is reduced. The battery charging technology consists in the fact that the lead sulfate formed during the discharge is converted back into lead dioxide and sulfuric acid, and this restores the necessary chemical energy, which will be converted into electrical energy during the next use. the optimum charging voltage is important for charging the battery. If the voltage is too high, electrolysis of the water will occur with a reduction in the electrolyte level. If the voltage is too low, the batteries will not be able to be properly charged, which will shorten their life.

Make sure the battery is charged before installing it. The recommended charging current is 10% of the rated capacity, in amperes. The manufacturer strongly recommends that the battery be fully charged before any installation in order to ensure normal operating life. A new battery can take a charge of approximately 80% after activation The best and easiest way to test a battery is to use a voltmeter or multimeter to measure the voltage. It is possible to estimate the state of charge from the manufacturer’s data sheet knowing the exact voltage.

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Technologies used

Battery (lat. Accumulare. “to accumulate”). a device for storing energy for later use.

The electric battery is a reusable chemical source of electric current based on the principle of reversibility of chemical processes: during charging electric energy is converted into chemical energy, during discharging it is converted back. The active substances used up when discharging the battery are regenerated on the next charge. Electric accumulators are used as an autonomous source of energy.

Important parameters of a battery. capacity, efficiency, voltage, operating requirements, service life.

The field of application of batteries is wide: industry, electric power, medicine, life support and security systems, communication and telecommunications, aviation, transport, electronics, etc.д.

Depending on the electrode material and electrolyte composition, batteries are divided into several types. The best known of them are acid-lead batteries (they are used in cars as starter batteries); nickel-cadmium batteries; nickel-metal hydride batteries; lithium-ion batteries; lithium-polymer batteries.

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A group of electric batteries of the same type, connected electrically and structurally, forms a battery (AKB). Using a battery in place of one battery allows you to get the necessary current and voltage.

Batteries are divided into two main groups according to their purpose: traction and starter batteries.

There are several types of batteries according to the presence of additives in the electrolysis material:

antimony-antimony (lead plates contain more than 5% antimony); low-antimony (less than 5% antimony); calcium (adding calcium instead of antimony); hybrid (making plates by different technologies: positive. low-antimony, negative. calcium); GEL (gel) and AGM ( electrolyte in gel state); alkaline: nickel-cadmium and nickel-iron (using alkali as electrolyte), the leading area of application. traction batteries;

Lithium-ion batteries (the carriers of the electric current are lithium ions).

What parameters must be considered when purchasing rechargeable batteries?

electrical (nominal) capacity (battery capacity should not be less than the recommended capacity). The value of starting current. The size of the selected battery matches the size of the battery pad in the vehicle. Observe battery polarity.

The voltage across the battery terminals must match the voltage of the vehicle electrical system.

Information for Maintenance-Free Batteries

Maintenance free batteries must only be recharged using automatic chargers. The peculiarity of such batteries is that the degree of battery charge at the end of the charge is directly dependent on the value of the charging voltage, which provides the charger. For example, at 14, 4 volts, a 12 volt battery in 24 hours can be charged at about 75%. 85%, if the voltage of 15 volts in the same time by 85%. 90%, and at 16 volts. 95%. 97%.

It turns out that you can charge a maintenance-free battery at 16.3-16.4 volts for a maximum of 20.24 hours.

In our case we have charged maintenance free Bosch silver S4 battery with usual charger, with the voltage of 14,4-14,5 V it was charged for 24 hours to 90%, Also it should be noted that in the beginning of charging current reached 40-50A. In order to charge it fully, it was necessary to leave the battery for a few hours more.

Does the maintenance-free battery need charging??

There is an opinion among first-time car enthusiasts that if the battery is maintenance-free, it does not need to be recharged. Requires no less than the rest of the battery. In fact, calcium maintenance free batteries are different in that they have no (or have very low) water consumption. Calcium alloying of the plates shifts the point of hydrolysis of water to a higher voltage. In standard low-maintenance batteries, hydrolysis of water (decomposition into oxygen and hydrogen) begins at a terminal voltage of 14.4 volts.

Maintenance-free batteries. this is a “stick” in two ends. On the one hand, there are no problems with operation. As they say. put it in, use it and throw it away.

On the other hand, if used incorrectly and mistakes in the charging (lack of it), the power supply resource can be reduced.

It will be impossible to do anything. There are known cases, when after 1-2 years of service once new batteries were sent to the trash.

So the task of a good motorist is to know how to take care of a maintenance-free battery, and to charge it in time.

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