How to charge a Bosch s3 007 battery

How to find out the year of manufacture and decipher the code

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

Added: details in a separate article, read here.

The date of manufacture is encoded in the numbers that follow it. The fourth digit is the last digit of the production year. The fifth and sixth are the 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 help other car enthusiasts and make the material more complete and accurate.

Charging procedure

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 the old transformer are not suitable. Ideally, you need a machine 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 either by the instruments or on the digital display;
  • cyclic charge / hold / discharge operation to desulphate the lead plates.

If you plan to work with the battery in the garage, you do not need to remove it from the car. Before you can charge a maintenance free car battery with the charger you have to disconnect the terminals of the onboard network. This will reset the controller errors and user settings. There is no big trouble here, only some inconvenience. Then follow the recommendations:

  • Connect the leads from the charger to the power source, observing polarity. Usually on serial units the icons and. are stamped directly on the crocodiles.
  • Check the voltage delivered by the battery. If it appears to be below 11 V, then you are dealing with a useless and completely discharged battery, it is practically impossible to restore it.
  • To begin with set the voltage of 12,6 volt, switch on the device for charging and observe the process for 30-60 min. A rapidly accelerating ammeter reading, as well as rapid boiling of the electrolyte, indicates a high probability of internal short circuit in the battery. Charging will have to stop and think about buying a new source.
  • 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 it is reached, the charge must be stopped or the electrolyte will boil. This completes the recharging procedure.

To reach the lower limit of 0.5 to 1 A current take usually 5 to 6 hours, in the worst case up to 1 day. Do not rush with charging and raise the voltage, 14.4V is the optimal value, and the maximum is 15.6V.

To prevent damage to your maintenance-free automotive battery, do not exceed the 15.6V threshold during reconditioning and do not use devices without voltage monitoring.

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

Advantages and disadvantages

Some 20-30 years ago a battery charger for trucks and buses was associated by specialists with something big and usually stationary.

Real powerful charger was considered to be a heavy box with transformer inside, different switches, voltmeter and ammeter outside.

And all small and portable items belonged to the category of amateur equipment that can cope at best with car batteries.

Today the situation is different. A modern professional battery charger is a rather nice automatic box with a minimum of controls and an understandable interface. What such devices can do?

Improving the range of service equipment Bosch presented on Russian market professional devices Bosch BAT645 and BAT690. “Autopark” took the opportunity to get a closer look at the innovations.

The Bosch C7 is one of the few entry-level models to charge 12- and 24-volt batteries.

Easy cable replacement is a major plus for BAT645.

Today’s trucks are much more reliant on electronics than their predecessors. advanced power systems require new service approaches. Service equipment now requires a different, broader range of functions.

As one of the market leaders in this segment, Bosch today provides clear answers to the needs of technicians.

Fully automatic line of battery chargers includes two versatile Bosch BAT645 and BAT690 professional appliances with 45 and 90 A charging currents, respectively. Both are designed for operation with on-board 12V or 24V networks.

In addition to conventional lead-acid and gel batteries, these chargers are suitable for batteries with new technologies, AGM (with electrolyte distribution in porous glass fiber separators), and advanced lithium-ion batteries (LiFePO4, or briefly, LFP) with energy management system (BMS).

With the help of such devices the battery can be charged both in the mounted on the car and in the dismounted state. Novelty provides for operation both in portable and stationary position. For example, the battery charger can be mounted on a wall with the optional wall bracket.

Putting the BAT645 into operation. Outwardly the charger is a green metal box, which is protected from the sides by rubberized frames. Module is equipped with a radiator and fan.

On the front side of the device there is a TFT display, mode selection buttons and three status LEDs. On the smaller side there are connectors for mains and power cables, the simple replacement of them is an additional advantage of the model.

The charger also has a USB port on the side, protected by a plug and used for downloading updates.

The ability to load characteristics and charging algorithms for new types of batteries that may appear in the future maximizes the useful life of the equipment, Bosch engineers explain. By the way, end customers will get the latest firmware versions from the dealers where the equipment was purchased.

The fuse in the power cable is not convenient.

The BAT645 comes with a three-meter long 6 mm2 charging cable with powerful alligator clips. The 5 m long cable is available as an option.

Low weight of approx. 4 kg and size (height 120 mm, width 220 mm) ensure high mobility. For example, it is even possible to place the charger under the car in the process of repair.

In this position it will not interfere with the work of the mechanics.

If you compare the new product with its predecessor. the well-known Bosch BAT430, the “six hundred forty-fifth” will handicap it not only in technical characteristics (“old man” produces maximum 30A), but also in the variability of settings. Here, for example, the required voltage can be set manually. As you will see in the following, this is very important.

In charging mode the BAT645 recognizes automatically which battery is connected: a 12 V or a 24 V one (two 12 V batteries in series).

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In the first case the threshold for the correct identification is 3V (7V for LFP), in the second case. 17V.

You can also charge a deep discharged battery, but in this case the device takes it by default as a 12 volt battery and the two batteries will have to be connected separately.

The Fronius automatic has already had 8 years of service and has received good reviews from mechanics.

Charging mode will depend on the type and capacity of the battery (these parameters must be chosen manually from those offered in the device menu). The interface of the program is multilingual (22 languages), Russian is programmed by default.

Fully automatic charging of any type of battery, thanks to the versatility of the unit. In addition, for each type of battery, the user can select special charging characteristics for different technologies.

BAT645 has various graphic characteristics and charging cycles.

Generally the whole process consists of three phases: the main phase (charging current is about 20% of the installed capacity of the battery), the intermediate phase (current decreases to 2% of the capacity) and the final phase (active mode is activated only if the voltage of one battery drops below 13.5V).

This is interesting: What the “Kursk battery” is good for?

For deeply discharged batteries the BAT645 first uses a gentle charge. The mode is activated automatically, the message “soft charging” appears on the display, the LED blinking rhythm is changed. Additional modes of operation are available: BAT645 can operate as backup (standby) or buffer power supply.

charge, bosch, battery

In a maintenance mode the BAT645 supplies power to consumers in the car instead of the battery.

Usually this is done not to disable current settings of power sensitive devices (for example, onboard multimedia complexes) during battery replacement. The output voltage of the charger is stable and constant, but the current is limited to 15A.

Since part of the automatics is disabled in this mode, it is important that when installing the battery, the polarity of the connection must be correct, experts remind.

Thanks to the versatility of the device charging of any type of battery is in a fully automatic mode.

In the buffer mode the BAT645 maintains charging of the battery when the engine is stopped and heavy current consumers need to be switched on.

Stabilized external power supply for the onboard network is most often used for works related to software updates of control units.

When buffering, the BAT645 also automatically detects the battery voltage. The maximum possible value of current is 30A.

In the “Parameters” menu for both the buffer and support modes you can select and edit the value of the stabilized voltage. However, when entering the parameters, the battery manufacturer’s information should be taken into account to avoid exceeding the allowable thresholds. In general, the Bosch BAT645 is simple: switch it on and use it.

What, in fact, we were convinced during the test. Only the lack of a special regeneration mode was questionable. A Bosch representative explained that the analogy in this case is the “gentle loading” function.

Intended use of the BAT645: Dealerships/independent repair shops, large garages, service stations, gas stations and training centers.

The USB port is used to install updates.

For amateur use Bosch offers more affordable units C7 (guide price 6000 ), designed to charge 12 and 24 volt batteries. In fact, this is one of the few entry-level models that work on two voltage steps.

Of course, this device will not be able to recharge a badly discharged battery, but the maximum current of 7A will be quite enough to quickly charge most “civilian” batteries up to 100Ah.

The compact charger weighs only 1.7 kg and can work with all types of lead-acid batteries. from classic starter batteries with liquid electrolyte to modern batteries based on AGM technology.

The Bosch C7 allows the manual selection of one of the six operating modes: charging in standard mode, charging in winter (at temperatures below 5°C), recovery of a sulfated battery (pulse charging), and operation in the stabilized power supply mode (for 12-volt consumers) with an output current not exceeding 5 A.

The charger can be placed under the vehicle and will not get in the way.

This is exactly the case when, for example, the car is parked for a long time, the engine cannot be started while parked, but the comfort systems must work. There is no display on the case, but the information about the status of the charging process gives four indicators: no mission, low charge, average charge and full charge.

charge, bosch, battery

There are five more indicators to inform you about the selected mode. Finally, there is a separate indicator that signals polarity reversal. If something has gone wrong, the device automatically diagnoses it and simply does not turn on. Fuse in the power cord is a bad reason to be picky.

Such “foolproof” is not modern and comfortable.

We tested the device by simulating the charging of the battery on the car. Judging by the work in the garage we can say that the Bosch C7 honestly produces the manufacturer’s declared charging programs.

Bosch C3 Battery Chargers manual

If you want to apply for a loan, then be sure to read the following information!Before making a payment to the Loan. Always call the manager. specify the availability and price, and put the selected item in reserve. The credit amount includes only the cost of goods. Delivery, replacement battery and other, if necessary, paid separately upon receipt of goods. Only Privat cardholder is allowed to take credit. If it is not available, you can get the card at any time at the nearest bank branch. Main conditions:

The maximum credit period is 10 months.

For example, if you take credit for goods worth UAH 1000, the monthly payment will be UAH 129., The first payment will be deducted immediately at registration of loan, the rest repayment will be made automatically each month, provided that there is sufficient amount of funds on the card. Monthly overpayment will be only 29 UAH.

At early repayment, for example: a month after the purchase, you will pay only 129 929 = 1058 UAH. Two months after purchase, you will pay only 129 129 829 = 1087 UAH.Please note, that in order to get credit on the card you need to have sufficient credit limit and amount for the first monthly payment. Find out the available limit or increase it (provide proof of ownership if necessary, etc.).) you can call 3700 or go to any bank branch.

The design of S5 AGM technology

The 12 V starter battery consists of 6 separate cells located in a casing and connected in series. The cell is the smallest electrochemical unit. It has no individual container, and the contacts are connected to the adjacent parts of the structure by soldering. Each cell contains a cell that consists of a set of negative and positive plates separated by a separator, a microporous insulating filler placed between the oppositely charged plates. The electrolyte is an aqueous solution diluted with 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 of the structure is used for the integrity of the battery and ensures excellent performance. Improper operation leads to battery failure.

The main causes of rapid battery failure:

  • Lights on when the car is parked.
  • Auxiliary heating powered by battery.
  • The current generator defect.
  • Faulty voltage regulator.
  • Control unit error.
  • Additional electrical equipment installed.
  • Installing a battery that does not comply with the car’s data sheet.
  • Frequent stops of the car.
  • Overloaded connected load: radio, TV, DVD, cooling units.
  • Short circuit / dead cell.
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Recommended: Car battery capacity and choice of battery for the car

Game. find one difference


Maintenance-free batteries are typically those that do not have access to the electrolyte. In other words. they are without plugs. It follows that it is not possible to charge a maintenance-free battery:

  • Measuring the electrolyte level.
  • If necessary, replenish the lost electrolyte.
  • Measure the density of the electrolyte.
  • Adjust it as needed.
  • See the boiling process.

But the listed manipulations are habitual and very useful for charging ordinary, serviceable batteries. For example, you yawn with current or voltage and boil the battery. and you don’t even see when or how it happened. The electrolyte level has dropped. you can’t top up. There’s nothing to talk about density at all.

Contrary to common misconceptions, briefly described below, maintenance-free batteries are made for convenience and safety. After all, any ineptitude with the electrolyte is always fraught. Both for the health of the user and for the life of the battery. Acid can burn your skin, poison you, damage your eyesight. And if you fill up the battery with electrolyte or even water without understanding what’s going on you may deprive the battery of health.

Maintenance-free batteries are an attempt by manufacturers to free drivers from the inconvenient and dangerous fiddling with the electrolyte while charging. But don’t think it’s easy. don’t plug the battery and you’re done. Keep a maintenance free battery. No. It’s much more complicated than that. At least, since the manufacturer does not provide access to the electrolyte, he takes care of the fact that it is harder to boil a maintenance free battery by inept charging.

This can be achieved by applying a special alloy coating on the lead plates. The most common protection against boiling is calcium. Thanks to its presence on the surface of the plates, the electrolysis process when charging the battery begins at a much higher voltage than without such a coating. For example, if in the past conventional batteries easily boiled over as early as 14.5 V, the modern calcium batteries do not boil until you put them at 15-16 V.

Other solutions are being implemented. For example, an elaborate system of pressure relief and balancing between all the compartments. Some manufacturers achieve good results by introducing their proprietary electrolyte mixing systems to prevent stratification. And so on.

From the above it should be clear that the AGM and GEL batteries must be considered as maintenance-free. For information on how to charge them properly, see the links hidden in the names of the technologies. Getting ahead of the curve, we should note that both AGM and GEL batteries have their own nuances concerning charging. And they are different from batteries with liquid electrolyte. That is, the algorithm, provided below, is not suitable for gel and AGM batteries.

How to open the maintenance free battery by yourself

In the 90’s the development of battery manufacturing has stepped forward. If in the old batteries it was necessary to monitor the electrolyte level, then, according to the manufacturers, there is no need to do this on modern models. Manufacturers call these batteries maintenance free, in their opinion they do not require electrolyte control. But this is far from true; these batteries do require maintenance.

“Maintenance-free” battery is a battery model that does not require topping up with water. But this type of batteries has a serious disadvantage. if it is fully discharged several times, it loses its capacity. After that it can be thrown in the trash.

Know Your Battery Charging Time

Batteries without access to the battery banks are relatively new. They have a hydrometer or “sight glass” to check the charge level.

In most cases, lack of maintenance on these batteries is fraught with battery failure.

The main disadvantages of such batteries include:

  • difficulty in checking the electrolyte level
  • impossibility to control the density of the electrolyte;
  • the need for flawless operation of the machine’s power grid.

On some types of batteries for controlling the level of electrolyte there are markings of maximum and minimum of working liquid.


Valera Great battery for all occasions. It’s a pleasure to use. I rarely need to charge it and it needs very little maintenance. Holds well in cold weather. Last winter was very cold, but it did all right.

Aleksandr I own a used car, so I use a budget Bosch battery especially for it. It’s serviceable, but maintenance is minimal. Sometimes you need to add water, and the main thing is to charge it in time.

Egor It’s a good battery, a bit pricey but well worth it. Minimal hassle. maximum result. I’ve been using it for five years and I’m happy with it.

In modern cars more and more often the manufacturer begins to install maintenance-free batteries. There are many recommendations on how to charge the 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. This publication will consider a simple and at the same time effective way to charge a car maintenance-free battery by the example of Bosch silver S4.

Before you begin charging, it’s a good idea to determine the age of the battery. Unattended car batteries that are more than five years old to charge or reanimate is a waste of time. Even if you manage to do something with it, it won’t last long. It is best to take old batteries to the recycling department immediately.

And now for the technical aspects of charging. The charger with which you will be charging should be fully automatic, i.e.е. The charging process must be controlled by the program you choose. This program will be able to control the necessary charging current by itself, as well as provide a constant supply of the right charging 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 harmful substances are released to the body.

And one more nuance, if you charge from time to time only the battery of your car, then buying 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.

BMS 3S 40A rev 2 board.3 for converting the Bosch GSR 9.6 electric screwdriver power supply to lithium

I have a Bosch GSR 9,6 electric screwdriver. The battery was already the 3rd one, Ni-MH. Of course the Chinese, you can not find the original to this. As practice has shown, they do not live long, even in storage mode die very quickly, and the payoff from them is weak.And they are expensive these days. Wanted to sell, but no one is taking. So it was gathering dust in the garage for several years. And the machine is good, made in Switzerland for some reason, has never failed. So it was decided to convert its battery to lithium and use it further.

There is a lot of information on how to remake, many have gone this way. So I used the experience of experienced people. For which they are grateful to you, your hard work is not wasted. I tried to collect the most necessary materials from my point of view. Here they are.

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The task of remodeling can be divided into two steps: 1. Redesign of the battery itself 2. Redesigning the charger. It is necessary because the way of charging lithium and nickel are completely different, and convenient box completely adapted by a landing place for accum. don’t want to lose it.

For this we need the batteries themselves Of course, it would be ideal to order batteries from the famous site But I only needed 3 pieces, and I do not have a welder. Paying for the delivery of only 3 batteries 10 euros, too no reason. So order on Ali, I hope in a trusted store link. These are the ones with the petals already welded, you could have soldered the experience is good, but it’s better this way)

These are similar batteries to the LG HG2 3000 mAh 20A, under the brand name LiitoKala HG2

Blue chart original, red chart Litokala, discharge current of 3 and 10A. Work in this model of electric screwdriver should be fine, it is not very powerful.

According to the datasheet, this type of battery has a capacity of 3000 mAh, which is guaranteed at a discharge current of 0.6 A. Standard charge. 1.5 A, the declared voltage of full discharge 2.5 V, full charge 4.2 V. The maximum stated current continuous discharge. up to 20 A, fast charge 4 A.

Reviews on these batteries enough. As for the ones I bought, the weight is the same, so is the capacity. Dimensions, top cover is also the same as the original. I missed the moment of measuring and photographing, so take your word for it. Here is a picture of the measurement of internal resistance

All three have the same almost. So it may be a fake but it behaves exactly like the original. These batteries are enough for my electric screwdriver. The parameters of Litocal unfortunately vary from batch to batch, so what will come in each case is impossible to guess. I was lucky in this case.

The next element is the short circuit, overdischarge and overdischarge protection board, as well as the balancing of the cells. It is mandatory for lithium. Otherwise the cells will be killed quickly or even worse will catch fire at maximum load. That’s where I started. So

In the case of the old batteries can be shoved the assembly 3S, t.E 3 batteries in series, the place allows to assemble 3S2P, 3 in series, 2 in parallel, but for my needs it will be superfluous. Then again, this kind of assembly is better to weld to size, and I don’t have a welder.

Main functions: overcharge protection, overdischarge protection, short circuit protection, overcurrent protection, balancing. Supply voltage: 12.6V / 13.6V Discharge current: 40A Cell balancing current: 100mA Maximum charging voltage per battery: 4.095. 4.195 ± 0.05 V minimum discharge voltage per battery: 2.55 ± 08V Delay time: 0.1s Temperature range:.30-80 Short circuit detection delay time: 100 ms Size: 42 x 60 mm x 3.4 mm Weight: 8.7 g This is the new version of the BMS 3S 40A rev 2 board.3, there is also an older version BMS 3S 40A 12.6v rev 2.2 all the same but with two current shunts as resistors it is more critical to the quality of batteries, here shunts are apparently made with the help of mosfets.

And machine translation from ALI Application: Rated voltage 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery). Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current). Continuous charging current (upper limit): 20A; suitable for drills with a starting current below 80A, 135W power below. Note 1: three 15C-20C batteries or six 10C-15C batteries are required to successfully start the drill (normal 18650 batteries cannot start the drill!).

Also observe the following rules for connection

Batteries must be connected to the controller in series, 0V first, then 4.2V, 8.4V, 12.6V, otherwise the BMS will not work! Avoid short circuits when installing batteries! Use the same type of batteries! Balance the batteries before installing them! (balancing can be done by short-circuiting all the minus contacts of the batteries between each other, and the plus contacts between each other) After assembly, connect the appropriate charger to the BMS, to activate it! Use a quality mounting wire for the appropriate current!

There is another subtle point, under heavy loads, at startup for example, the voltage drop protection may trip. This is if the batteries have not been used much. I need to solder an additional 4.7MF ceramic capacitor

Also on this board there are pins CD and FD called “charge detect” and “full detect.). The surrounding resistors seem too much resistance to support the LED, so a buffer transistor is probably required. I didn’t use them because I made the indication on the charger.

The assembling of this circuit is very simple and I packed the battery pack in a heat shrink. The main power wires are 14AWG in silicone insulation. Didn’t connect the thermistor, just didn’t figure out where.

I put silicon car sealant on the inside to fix it tightly. If the battery fails, you can always disassemble

The lid is closed and the battery is assembled. I did not make the indicator, firstly I do not have it and secondly the degree of discharge can be judged by the rotation force of the screwdriver. Full discharge protection will always work.

Redesigning the charger if you plan to use it is a must. The way to charge the lithium is different than the way to charge the stock nickel batteries. You could take the easy way out and buy a 3S, 12 battery charger from the Chinese.6 В. Attach jack and charge through 3.5 Jack

charge, bosch, battery

But I wanted to keep the authenticity and to charge in a normal block, like it should be.

Аккумулятор Bosch s3 007

So I took the original charger and stripped it of everything. I left only the transformer, diode bridge and capacitor and assembled it according to the diagram from the previous reviews. Thanks to kirich for the explanatory work )

As a converter I used a board for charging lithium assemblies with adjustable charging current and max charging voltage.

There are a lot of them on ali. The first one is simpler, only current and voltage are regulated, the charge indication is fixed, the LED goes out when the current falls below 1/10 of the set charging current (standard lithium charging algorithm). Here you can find the detailed description and schematic of the board

the second one is similar to the first one but in more “advanced” variant, the battery voltage and the charging current are displayed. Here is a detailed description of the work and the circuit board

All assembled according to the schematic, fasten everything in the charger body that nothing would hang out, all the same mobile device) LEDs are placed on the charger body for charging control. Right, of course to do as he wrote in his articles kirich, but I thought it was superfluous, and the body did not fit anything else)

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