Characteristics of the Kedr-Auto 4A charger
- Rated supply voltage, V 220
- Network frequency, Hz 50
- Charging current, A (max.) 4 A
Fundamental electrical diagram ASU
Printed circuit board and ASU connection
If you can’t buy it, you can easily assemble it yourself. Which is what I did. I used imported transistors VS556b (pnp) and bc337-40 (npn) instead of KT315 and KT361. The photo shows the factory charger board and my homemade one.
Factory boardautomatic charger
Homemadeboard assembly
I assembled this device, checked it - it works great, I like it. This charger has:
- automatic mode- desulfate mode
- protection against incorrect connection and short circuit.
It will be useful to make a small improvement to the memory. Complete disconnection from the 220V network at the end of the charge, so to speak, for every fireman. Disconnecting the Kedr-M charger from the network when the LED lights up " end of charging" can be performed on a triac or relay. The command to turn on/off can be taken from the collector of transistor VT1, adding another transistor turned on in key mode, and using it to switch the power to the relay winding or the current through the LED of the optocoupler that controls the triac. The circuit was assembled and tested: vovcanchin.
Discuss the article AUTOMATIC CHARGER DIAGRAM
Review of chargers for car batteries of the Kedr series
Any car owner should have in his arsenal a charger for a 12 V car battery. You simply cannot do without it when operating your car. If you are a novice car enthusiast and have not yet bought a battery charger, then you will definitely come to this. This is especially important in winter, when you need to charge the battery more often than usual. Otherwise, you may end up in a car with a “dead” battery and will have to “light it up”. You can, of course, charge the battery at a service station. But these are unnecessary expenses and wasted time. It is easier to charge the battery in the garage or at home. You just need to choose the right charger. In this article we will talk about chargers for Kedr car batteries. Let's consider different models and read what people say in reviews.
"Kedr-M"
This charger (charger) is designed for charging car batteries. The device is also designed to restore the performance of batteries, which they have lost as a result of oxidation and sulfation of the electrodes. In addition, the charger can be used for charge-discharge training to increase service life.
Main features of the device:
- Disabling the charging process automatic mode;
- There is a cyclic mode of operation (charge-discharge) to restore lost capacity as a result of sulfation of the plates;
- Protection against incorrect connection of clamps to current terminals and against short circuits;
- There is a recharging mode designed to bring the battery to full capacity.
The network cable, as well as cords with clamps, are located in a special compartment on the back of the device.
Note! Charger "Kedr-M" voltage, which is dangerous to life. Always turn off the device before making repairs or changing the fuse. It is strictly forbidden to use homemade fuses and cover the holes in the housing provided for ventilation. In addition, it is prohibited to charge the battery closer than one meter to heating appliances, stoves, etc.
The table below shows the main parameters of the Kedr-M device.
| Characteristics | Meaning |
|---|---|
| Characteristics | Meaning |
| Power supply voltage, V | 220 |
| Chargeable battery rating, V | 12 |
| Charge current, A | up to 4 |
| Power consumption, watt | up to 85 |
| Duration of pulse charging current in cyclic mode, sec | from 15 to 75 |
| Duration of pulse discharge current in cyclic mode, sec | from 5 to 25 |
| Permissible temperature environment, WITH | from 10 to 40 |
| Permissible air humidity, % | 98 (at 25 C) |
| Permissible atmospheric, | 84 kPa |
In order to prepare Kedr-M for work, open the rear compartment and remove the cords with terminals. Set the first toggle switch to charge mode, and the second select continuous or cyclic mode. Continuous is recommended when you need to charge the battery. The cyclic mode is used when desulfating or forming electrodes. In this case, you need to connect a 12 volt light bulb with a power of 6 watts to the terminals. Next, observing the polarity, connect the terminals to the current terminals.
It is worth noting here that the Kedr-M charger has protection against short circuits and incorrect connection. The device will only work if a battery with a voltage of 10 volts or more is connected to the terminals. That is, it will not charge a deeply discharged battery, going into protection.
While the charger is operating, you can switch modes without disconnecting the device from the 220 volt network. If the battery is discharged, the charging current will initially be 4 amperes, and then will constantly decrease. Once the battery is fully charged, the charger will turn off and the LED will blink, indicating the end of the process. After this, you can set the Kedr-M to recharging mode.
In cyclic mode, the battery is charged for approximately 45 seconds and then discharged via a connected light bulb. In this mode there is no automatic shutdown and the process must be controlled independently.
Below you can see two versions of the circuit diagram of the Kedr-M car battery charger.
In the table below you can see the designation of the elements on the circuit diagram.
Chargers "Kedr-Auto 4A" and "Kedr-Auto 12V"
This charger model is designed for charging and restoring 12-volt lead-acid batteries and conducting charge-charge training cycles.
The power cords and connections to the battery come out of the back of the device. Unlike the Kedr-M model, there is no compartment for laying wires. The procedure for using the Kedr-Auto 4A charger will be shown below in the “How to use?” section. The table below shows the main characteristics of these models.
Below is circuit diagram"Kedr-Auto 4A" and "Kedr-Auto 12B".
In the table you can see a list of elements indicated on the circuit diagram.
The photo below shows printed circuit board for the production of "Kedr-Auto 4A" and "Kedr-Auto 12B".
This is an improved version of the Kedr-Auto 4A charger, which was released in 2008. The manufacturer reports that the charger is designed for charging 12-volt lead-acid batteries.
What are the differences between the improved model?
- Improved protection against incorrect connection of terminals, short circuit and overload;
- During assembly, modern transformers and other components are used;
- Added pre-launch mode (“afterburner”). In this mode, the battery is charged with a current of 10 amperes. After this, the charger automatically switches to charging mode with a current of 4 amperes;
- After completing the main charging stage, Kedr-Auto-10 automatically switches the device to recharging with a current of 0.5 amperes. This ensures the battery is fully charged and avoids overcharging.;
- Possibility to carry out desulfation in a cycle;
- In automatic charge mode, the rated current is 4 A;
- Service life from 5 years if the operating instructions are followed;
- The weight of the charger is only 600 grams;
- Warranty ─ 1 year.
The main characteristics of Kedr-Auto-10 can be seen below:
- Dimensions are 185 by 130 by 90 millimeters;
- Pre-start mode with charging current up to 10 amperes;
- Rated charging current 4 amperes;
- Power consumption is up to 250 watts;
- The nominal value of the batteries being charged is 12 volts;
- The charger operates from a 220 volt network.
Charging time depends on the degree of discharge of the battery and its capacity. The Kedr-Auto-10 charger has a microprocessor that controls charging. Including pre-launch mode. All this is done when the device is switched to automatic mode. First, an increased charge current is supplied, which is then reduced to the nominal value. This speeds up the charging process.
Everyone who has a car knows perfectly well where the colored parallelepiped is located, covered with colored stickers, and why it is needed, but few people think that the battery does not last forever, and it needs to be at least looked after. Only then will she be able to last the 5-7 years allotted to her. And if necessary, it needs to be charged. Moreover, it should be charged correctly, and now there are all conditions for this.
Charger Kedr Auto 4a
Among hundreds of thousands of charger models, many motorists prefer domestic chargers. Whether it’s the genetic force of habit, or commendable patriotism, the Kedr Auto 4a charger enjoys a certain popularity. Many people have difficulty repairing this device due to the fact that the circuit is lost, and it is not always possible to find the original one. We rummaged through our archives and dug up a diagram of the device, which we offer for study.
It has a simple architecture, and it’s quite easy to understand if you can distinguish a resistor from a canister. And if you can’t, we will try to explain what it is, why it is needed and how to use it.
When to use a charger
Chemistry is a delicate thing, and a battery consists entirely of chemical processes. We will not dive into the intricacies of chemistry, but will find out what concerns the average motorist, his battery, and the Kedr Auto 4a charger.
The battery should be fine. In winter and summer. But it has an acceptable degree of discharge, which is checked quite simply - using a hydrometer, if the battery design allows it, or by measuring the minimum voltage at the terminals. In the first case, we measure the density, in the second, the voltage directly. The permissible value of battery discharge in winter is 25% of the nominal value, and in summer - 50%. If the jar can maintain a voltage of 1.6 V for five seconds, then it is fully charged. If the voltage is 1.4 V, then the battery is 50% dead. all arithmetic.
It is necessary to recharge the battery, and if you chose Kedr Auto 4a, then it will completely cope with its task if it is in good condition. And the consequences of improper charging can be sad for the battery, so no matter how smart the device is, it needs to be monitored.
Description
Any rechargeable battery is charged from a source greater than the battery voltage, and this must be a source direct current. Therefore, the memory must convert alternating current to constant, and at the output give us the voltage necessary for charging. The device does this perfectly. Here are its technical data:
- capable of operating from a household network 220 V ± 11 V;
- the nominal voltage of the battery it charges is 12 V;
- minimum charge current - 4.0 A;
- consumes no more than 85 W.
Designed for both charging and restoring batteries that have lost their charge for a number of reasons. A lot of factors can cause a voltage drop on the battery, but the most important is considered to be sulfation of the plates and their oxidation. Cedar is also intended for training charge-discharge cycles, restoring the battery’s ability to hold a charge.
Charging in progress a certain amount of time, which depends on the capacity of the battery, the degree of wear of the plates, as well as the degree of discharge of the battery. Equipped with a simple microprocessor that controls all possible charging and operating modes of the device.
Functions
When the charger is connected with correct polarity, the device starts charging the battery automatically, which is indicated by the LED. In this mode, standard battery charging is carried out with a current of no more than 4 A with voltage control at the terminals. When the maximum charging voltage is reached, the device itself disconnects from the battery. This is indicated by a flashing LED.
To remove sulfation, you must use the “cycle” mode. In this mode, it is advisable to connect a parallel load to the battery, which consumes about 1 A of current. A 6 W car light bulb is suitable for this. If you don’t do this, the process will also be successful, but it will take a little longer. To completely eliminate sulfation, you must leave the battery connected to the device for 3-5 days.
The device also has a pre-start battery charging mode. In this case, charging occurs faster due to the fact that a high current rating is used - up to 10 A. The process lasts about five minutes. After this, the device automatically switches to “automatic” mode, and already limits the current to 4 A.
This is how Kedr Auto 4a works. Thanks to a simple circuit, any malfunction can be identified and eliminated, and the device lasts quite a long time. Keep an eye on the ammeter, and good luck on your journey!
Charger Kedr-Auto 4A: abstract. Charger for car batteries
Every car owner should have a car battery charger in their arsenal. Operation of the vehicle without of this device can become significantly more complicated. You will find a car charger more useful when you have to charge the battery much more often. When the battery is completely discharged, you will have to “light” the car, which is not necessarily comfortable, and in some cases may require additional expenses due to the charge of 100. It is much easier to charge the battery at home. One of the most popular brands of car chargers is “Kedr” - devices of this brand are purchased by many vehicle owners.
Model range of chargers: Kedr-M
The Kedr-Auto charger is intended for recharging car batteries. Such equipment is mainly used to restore the functionality of batteries that have lost it due to sulfation reactions and oxidation of the electrodes. In addition, you can also increase the service life using the Kedr-Auto Mini charger as a means of training the charge-discharge cycle.
Device functions
- Automatically stops charging the battery.
- A repeating charge-discharge operating mode, the action of which is aimed at restoring the battery capacity as a result of the sulfation reaction of the plates.
- Protection system against small short circuits and incorrectly connected clamps.
- The provided recharging mode allows you to reach the full capacity of the battery.
Preparing for work
On the back of the charger there is a special compartment in which cords with clips and a network cable are hidden.
The voltage of the Kedr-Auto 4A charger can harm human health or become a prerequisite for a fatal outcome. The device must be turned off before restoration and repair work and changing the fuse. Installing homemade fuses and blocking the housing ventilation holes is strictly prohibited. In addition, do not charge the battery near heating devices.
Before work, cords with terminals are removed from the rear compartment of the device. The 1st lever of the device is switched to charge mode, the 2nd to repeating or continuous mode.
How to use Kedr-Auto 4A?
Continuous mode is used in this case if real charging of the battery is required.
The repeating mode is used when molding or desulfating electrodes. In this mode, a 6-watt, 12-volt light bulb is connected to the terminals.
Then the terminals are connected to the current terminals, observing polarity.
The Kedr charger has a protection mode against incorrect connection and small short circuits. The annotation for the Kedr-Auto 4A charger states that it can only function in this case if a battery with a minimum voltage of 10 volts is connected to the terminals. If you try to restore the charge of a completely discharged battery, the device will switch on protective mode.
Switching operating modes can be carried out without disconnecting the charger from the network. According to reviews on Kedr-Auto, the current strength at the beginning of the charging process is 4 A with the following gradual decrease. The charger automatically turns off after full charging
battery
What does a special LED notify about? After which you can put the charger into recharging mode.
Charging the battery in a repeating mode lasts 45 seconds, after which a special light turns on. This mode does not have an automatic shutdown, so it is better to keep the entire process under control.
"Kedr-Auto 4A" and "Kedr-Auto 12B"
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Both models are used for battery recovery, charging and training charge-discharge cycles.
The back wall of the devices houses the power and battery connections. There is no special compartment for placing wires in these models. The instructions for the Kedr-Auto 4A and Kedr-Auto 12V chargers carefully describe the operating rules and procedure for use.
Cedar car 10A charger
cedar Auto 10A has 3 battery charging modes.
Review: Kedr auto 10A. Automatic charger device
ATTENTION! You CANNOT start your car engine using this device!
The Kedr-Auto 12V charger has the following technical characteristics:
- Rating of batteries charged using the device. 12 V.
- Supply voltage. 220 V.
- Maximum power consumption. 85 A.
- Current strength. up to 4 A.
Charger "Kedr-Auto 10"
This model is an improved version of the previous charger - “Kedr-Auto 4A”, which was created in 2008. The device is used to charge a 12-volt battery.
Distinctive features of Kedr-Auto 10
- Improved protection against short circuits, overloads and incorrect terminal connections.
- Using only high-quality and modern components.
- Pre-start mode, in which the battery is charged with a current of 10 amperes. After this there is an automatic transition
charger
into battery charging mode with a current of 4 amperes.
- The main charging stage is replaced by a recharging mode with a current of 0.5 amperes. This mode allows you to avoid overcharging and restore the battery to full charge.
- Battery desulfation can be carried out in a cycle.
- The rated current in automatic charging mode is 4 A.
- Light weight
charger
Only 600 grams.
- Manufacturer's warranty. 1 year.
- If you follow the instructions for the Kedr-Auto 4A and Kedr-Auto 10 chargers, the service life is 5 years.
Main characteristics of Kedr-Auto 10
- Relatively small dimensions. 185 x 130 x 90 millimeters.
- Pre-start mode, the current in which is 10 amperes.
- Rated current. 4 amps.
- Power consumption of the device. 250 Watt.
- The charger allows you to charge rechargeable batteries with a maximum rating of 12 volts.
- The charger operates from a standard 220 V network.
The battery charging time varies depending on its capacity and degree of discharge. The microprocessor built into the charger controls charging and pre-start mode. All modes are turned on and the device is activated after the device is switched to automatic mode. First, an increased charging current is supplied, after which its strength is reduced to the nominal value, which significantly speeds up the battery charging process.
Operation process " Cedar
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The instructions for the Kedr-Auto 4A charger describe in detail the process of using the device and charging the battery. It is impossible to disable the memory, since the protection system protects it from damage even if the terminals were initially connected incorrectly.
Auto mode
Restoring a full battery charge is carried out as follows:
- The charger terminals are connected with correct polarity.
- The “Automatic” charging mode is turned on.
- The plug is connected to the 220 V network.
- The charging process will be interrupted by the device automatically after reaching the maximum charge level, which will be notified by the blinking indicator.
Cyclic mode
In the cycle, the battery is charged to full capacity as follows:
- A 12-volt car light bulb is connected to the battery terminals. It is advisable to select a light bulb whose power is 6 watts.
- The terminals are connected with correct polarity.
- The corresponding button starts the “Cycle” mode. In this mode, the charge indicator lights up constantly.
- The charger is connected to the power supply. This mode does not imply automatic shutdown; accordingly, the discharge and charge cycle can be repeated endlessly. For this reason, the user must independently monitor the charging
battery
Before the actual process of charging the battery, the plugs are removed from the cans. After completion of charging or restoration, the terminals are disconnected only after the charger is disconnected from the 220 V network.
ZU Kedr: user reviews
Most reviews left for Kedr chargers are positive. The most popular model of the device is “Kedr-Auto 4A”. Somewhat less often you can find reviews of the Kedr-Auto 10 model.
Among the advantages of the charger, car enthusiasts include simplicity and ease of operation, the low price of “Kedr-Auto” (about 1500-2500 rubles) and a long service life. Users often note that the charger
device
can last ten years or more without complaints. For many users, one of the main benefits is the cycling mode, as it allows you to desulfate and bring old batteries back to life. Car enthusiasts often note that with the help this mode It was possible to restore the functionality of the batteries, which had been completely discharged for a long time. Of course, it is impossible to completely restore the battery capacity, but a positive effect can be achieved.
However, you may encounter negative reviews. Some owners of Kedr-Auto chargers note that the battery does not charge in automatic mode. If the battery capacity exceeds 60 Ah, then charging it takes a very long time due to the 4 ampere limit. The same
rechargeable batteries
, whose capacity exceeds 70 Ah, are not fully charged. Users also noted that Kedr-Auto chargers do not charge batteries whose charge has dropped below 10 volts.
Despite all the negative reviews and existing shortcomings, Kedr-Auto chargers are one of the best and most popular on the automotive market. Devices allow you to quickly charge
rechargeable batteries
They are distinguished by a long service life and wide functionality and are significantly ahead of their competitors from other brands.
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Every car enthusiast should have a car in his arsenal. Operation of a vehicle without of this device can become significantly more complicated. A car charger may be most useful in the winter, when the battery has to be charged much more often. When the battery is completely discharged, you will have to “light up” the car, which is not always convenient, and in some cases may require additional expenses due to a visit to a service station. It is much easier to charge the battery at home. One of the most popular brands of car chargers is “Kedr” - devices of this brand are purchased by many vehicle owners.
Model range of chargers: "Kedr-M"
The Kedr-Auto charger is intended for recharging car batteries. Such equipment is mainly used to restore the functionality of batteries that have lost it due to sulfation reactions and oxidation of the electrodes. In addition, you can also increase the service life using the Kedr-Auto Mini charger by training the charge-discharge cycle.
Device functions
- Automatically stops charging the battery.
- Cyclic charge-discharge operating mode, the action of which is aimed at restoring the battery capacity as a result of the sulfation reaction of the plates.
- Protection system against short circuits and incorrectly connected terminals.
- The provided recharging mode allows you to reach the full capacity of the battery.
Preparing for work
On the back of the charger there is a special compartment in which cords with clips and a network cable are hidden.
The voltage of the Kedr-Auto 4A charger can harm human health or cause death. The device must be turned off before starting restoration and repair work and changing the fuse. Installing homemade fuses and blocking the ventilation holes of the case is strictly prohibited. In addition, do not charge the battery near heating devices.
Before starting work, remove the cords with terminals from the rear compartment of the device. The first lever of the device is switched to charge mode, the second – to cyclic or continuous mode.
How to use Kedr-Auto 4A?
Continuous mode is used when the battery needs to be fully charged.
The cyclic mode is used when molding or desulfating electrodes. In this mode, a 6-watt, 12-volt light bulb is connected to the terminals.
Then the terminals are connected to the current terminals, observing polarity.
The Kedr charger has a protection mode against incorrect connection and short circuits. The instructions for the Kedr-Auto 4A charger indicate that its operation is only possible if a battery with a minimum voltage of 10 volts is connected to the terminals. If you try to restore the charge of a completely discharged battery, the device will switch on protective mode.
Switching operating modes can be carried out without disconnecting the charger from the network. According to reviews on Kedr-Auto, the current strength at the beginning of the charging process is 4 A, followed by a gradual decrease. The charger automatically turns off after the battery is fully charged, which is indicated by a special LED. After this, you can put the charger into recharging mode.
Charging the battery in cyclic mode lasts 45 seconds, after which a special light turns on. This mode does not have automatic shutdown, so it is advisable to control the entire process.
"Kedr-Auto 4A" and "Kedr-Auto 12B"
Both models are used for battery recovery, charging and charge-discharge training cycles.
On the back wall of the devices there are power wires and connections to the battery. There is no special compartment for placing wires in these models. The instructions for the Kedr-Auto 4A and Kedr-Auto 12V chargers describe in detail the operating rules and procedure for use.
The Kedr-Auto 12V charger has the following technical characteristics:
- The nominal value of the batteries charged using the device is 12 V.
- Supply voltage - 220 V.
- Maximum power consumption - 85 A.
- Current strength - up to 4 A.
Charger "Kedr-Auto 10"
This model is an improved version of the previous charger - “Kedr-Auto 4A”, which was created in 2008. The device is used to charge a 12-volt battery.
Distinctive features of Kedr-Auto 10
- Improved protection against short circuits, overloads and incorrect terminal connections.
- Using only high-quality and modern components.
- Pre-start mode, in which the battery is charged with a current of 10 amperes. After this, the charger automatically switches to the battery charging mode with a current of 4 amperes.
- The main charging stage is replaced by a recharging mode with a current of 0.5 amperes. This mode allows you to avoid overcharging and restore the battery to full charge.
- can be produced in a cycle.
- The rated current in automatic charging mode is 4 A.
- Light weight of the charger - only 600 grams.
- Manufacturer's warranty - 1 year.
- If you follow the instructions for the Kedr-Auto 4A and Kedr-Auto 10 chargers, the service life is 5 years.
Main characteristics of Kedr-Auto 10
- Relatively small dimensions - 185 x 130 x 90 millimeters.
- Pre-start mode, the current in which is 10 amperes.
- Rated current is 4 amperes.
- The power consumption of the device is 250 Watt.
- The charger allows for a maximum rating of 12 volts.
- The charger operates from a standard 220 V network.
The battery charging time varies depending on its capacity and degree of discharge. The microprocessor built into the charger controls charging and pre-start mode. All modes are turned on and the device is activated after the device is switched to automatic mode. First, an increased charging current is supplied, after which its strength is reduced to the nominal value, which significantly speeds up the battery charging process.
Operation process of "Kedr-Auto 4A"
The instructions for the Kedr-Auto 4A charger describe in detail the process of using the device and charging the battery. It is impossible to disable the memory, since the protection system protects it from damage even if the terminals were initially connected incorrectly.
Auto mode
Restoring a full battery charge is carried out as follows:
- The charger terminals are connected with correct polarity.
- The “Automatic” charging mode is turned on.
- The plug is connected to the 220 V network.
- The charging process will be interrupted by the device automatically after reaching the maximum charge level, which will be notified by the blinking indicator.
Cyclic mode
In the cycle, the battery is charged to full capacity as follows:
- A 12-volt car light bulb is connected to the battery terminals. It is advisable to select a light bulb whose power is 6 watts.
- The terminals are connected with correct polarity.
- The corresponding button starts the “Cycle” mode. In this mode, the charge indicator lights up constantly.
- The charger is connected to the power supply. This mode does not imply automatic shutdown; accordingly, the discharge and charge cycle can be repeated endlessly. For this reason, the user must independently monitor the battery charge.
Before the actual process of charging the battery, the plugs are removed from the cans. After completion of charging or restoration, the terminals are disconnected only after the charger is disconnected from the 220 V network.
ZU "Kedr": user reviews
Most reviews left for Kedr chargers are positive. The most popular model of the device is “Kedr-Auto 4A”. Somewhat less often you can find reviews of the Kedr-Auto 10 model.
Among the advantages of the charger, car enthusiasts include simplicity and ease of operation, the low price of “Kedr-Auto” (about 1500-2500 rubles) and a long service life. Users often note that the charger can last ten years or more without any complaints. For many users, one of the main benefits is the cycling mode, as it allows you to desulfate and bring old batteries back to life. Car enthusiasts often note that with the help of this mode it was possible to restore the functionality of batteries that had been completely discharged for a long time. Of course, it is impossible to completely restore the battery capacity, but a positive effect can be achieved.
However, you may encounter negative reviews. Some owners of Kedr-Auto chargers note that the battery does not charge in automatic mode. If the battery capacity exceeds 60 Ah, then charging it takes a very long time due to the 4 ampere limit. The same batteries, the capacity of which exceeds 70 Ah, are not fully charged. Users also noted that Kedr-Auto chargers do not charge batteries whose charge has dropped below 10 volts.
Despite all the negative reviews and existing shortcomings, Kedr-Auto chargers are one of the best and most popular on the automotive market. The devices allow you to quickly charge batteries, have a long service life and wide functionality, and are significantly ahead of their competitors from other brands.
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