In detail: charger cedar auto 4a DIY repair from a real master for the site my.housecope.com.
Charger Cedar AUTO 4A. Instructions for use
Instructions for use of the prestarting charger Cedar AUTO 4A
The charger Kedr AUTO 4A is intended for charging and restoring the performance of acidic lead 12-volt batteries, partially lost as a result of sulfation and oxidation of electrodes, as well as training them by carrying out charge-discharge cycles in order to increase the resource, service life and preservation.
The device Kedr AUTO 4A provides automatic shutdown at the end of the charge in the "AUTOMATIC" mode. The device has a dial indicator (ammeter) and a light indicator, which: when the "AUTOMATIC" mode is switched on - does not light up; at the end of the charge in the "AUTOMATIC" mode - blinks; when the "CYCLE" mode is turned on, it glows evenly.
The KEDR-AUTO device provides an accelerated mode of charging a completely discharged (up to 10 V) battery with a compromise value of the initial current equal to 3 - 4 A. At the same time, after 1 - 2 hours (depending on the degree of battery discharge and voltage in the network), the value of the charging current decreases to a value of about 2 A and continues to decrease by the end of the charge to 1 A or less. This mode eliminates significant heating of the battery during charging and reduces the charging time of a fully discharged battery to 3 - 6 hours.
Before using the device, you must study the rules for the care and use of batteries.
ATTENTION! Before working with the "Kedr-auto" charger, you must carefully study these operating instructions.
Video (click to play). |
Be careful! The charger contains life-threatening voltages.
Before replacing the fuse and making repairs, disconnect the charger from the mains.
Do not use a homemade fuse, this may damage the device.
Do not charge batteries near stoves, radiators (at a distance of less than 1 meter).
The ventilation openings in the device case are not allowed.
It is prohibited:
- disassemble the device case and operate the charger with the top cover removed;
- operate the charger if the power cord is damaged;
- operate in conditions of high humidity, as well as in aggressive environments;
- operate the device near open flames or other sources of thermal radiation;
- operate the charger with closed ventilation openings. The battery charging process should be carried out in a well-ventilated area.
Before using the device, you must study the rules for the care and use of batteries.
Open the cover at the back of the charger and remove the cords. Set the toggle switch for turning on the automation to the "CHARGE" position.
The "CONTINUOUS-CYCLIC" charge mode toggle switch allows you to select the battery charging modes.
If it is necessary to charge the battery, switch the charge mode toggle switch to the "CONTINUOUS" position.
If it is necessary to form or desulfate the plates, when the capacity of the storage battery decreases, switch the toggle switch for selecting the charge mode to "CYCLIC". Connect the load to the terminals of the storage battery (bulb 12V 6 W).
Connect, observing the polarity, the cord using the clamps to the battery.
The electronic protection of the Kedr-M device against short circuit and incorrect polarity connection is designed in such a way that the charging current appears at the output only if a voltage source (battery) with a voltage of at least 10V is connected to the output terminals.
The lamp connected to the terminals of the charger will not light up, since it is not a voltage source.
Switching between the operating modes of the device "CONTINUOUS-CYCLIC" and "CHARGE-FURTHER CHARGE" can be done while charging the battery without disconnecting it from the network.
Connect the plug of the 220 V power cord, and the process of charging the battery begins, as evidenced by the ammeter readings.
The charging current of a fully discharged battery at the beginning of charging can amount to 4 A or more, further in the charging process the current will decrease.
When the battery charge is reached, the charger automatically turns off, as evidenced by the glow of the "END OF CHARGE" LED
Switch the toggle switch for turning on the automatics in the "DOUBLE CHARGE" mode and continue charging the battery. The battery is considered fully charged if during the charging process the electrolyte density does not change for two hours.
In cyclic charging mode, after every 45 seconds of charging, the battery is discharged for 15 seconds through the load (light bulb) connected to the battery.
In the “CYCLIC” or “DOUBLE CHARGE” position, the automatic equipment is turned off.
Despite the fact that the charger is simple and reliable in operation, in practice there are cases when consumers, due to improper use, cannot obtain the required charging current and mistakenly consider this to be a malfunction of the charger. These errors are summarized in the table.
The charger is intended for charging and restoring the performance of acidic lead 12-volt batteries, partially lost as a result of sulfation and oxidation of electrodes, as well as training them by conducting charge-discharge cycles in order to increase the resource, service life and preservation.
Before using the device, you must study the rules for the care and use of batteries.
- Rated voltage of the supply network, V - 220 ± 11;
- Rated voltage of the rechargeable battery, V -12;
- Charge current nominal, A, not less - 4.0;
- Power consumption, W, no more - 85.
The front panel contains:
- current indicator for monitoring the charge current;
- button for switching on the "AUTOMATIC" mode;
- LED indicating the end of the charge cycle;
- button for switching on the "CYCLE" mode.
The mains supply cord with a plug and the cords for connecting the device to the battery with clips are removed from the rear of the device.
Rice. 1. External view of the charger "Kedr-Auto 4A".
Rice. 2. External view of the charger "Kedr-Auto 12V".
Rice. 3. Schematic diagram of the Kedr-Auto 4A and Kedr-Auto 12V chargers (fuses F2 and F3 are not installed in the Kedr-Auto 12V device).
Tab. 1. List of elements to the schematic diagram of the device "Kedr-4A", "Kedr-12V".
All a Happy New Year! Dear experts, help me figure it out!
The charger for the Cedar 4 car, stopped charging, the voltage is not supplied to the terminals. I myself am not an expert in radio engineering, I checked, looked over and rang out what I could.
The diodes are working, the wires are intact, I think that the problem is in the transformer or the control board of the device.
As an option, I want to try to connect the terminals directly to the transformer (if it is alive) without a control board and a diode bridge, i.e. get at the output of the transformer voltage 14 V required to charge the car battery.
Is that possible?
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Any car owner should have in his arsenal a charger for a 12 V car battery. When operating a car, you simply cannot do without it. 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 the battery needs to be charged more often than usual. Otherwise, you may find yourself in a car with a "dead" battery and you will have to "light up". You can, of course, charge the battery at the service station. But these are unnecessary expenses and wasted time. It's easier to charge the battery in your garage or at home. You just need to choose the right charger. In this article we will talk about chargers for the Cedar car battery. Let's look at different models and read what people say in their reviews.
This charger (charger) is intended for charging car batteries. And also the device is designed to restore the performance of batteries, which they have lost as a result of oxidation and sulfation of electrodes. In addition, the charger can be used for charge-discharge training in order to increase the service life.
Charger "Kedr-M"
- Disabling the charging process in automatic mode;
- There is a cyclic mode of operation (charge-discharge) to restore the lost capacity as a result of sulfation of the plates;
- Protection against incorrect connection of clamps to current leads and short circuit;
- There is a recharge mode designed for a full capacity battery.
The mains cable and cords with clips are located in a special compartment on the back of the device.
Note! ZU "Kedr-M" voltage, which is life-threatening. Always switch off the machine before making repairs or changing the fuse. It is strictly forbidden to use self-made fuses and cover the openings in the case provided for ventilation. In addition, it is forbidden to charge the battery closer than one meter to heaters, stoves, etc.
The table below shows the main parameters of the Kedr-M device.
It is worth noting here that the Kedr-M charger has protection against short-circuit and incorrect connection. The device will work only 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 defense.
During the operation of the charger, you can switch modes without disconnecting the device from the 220 volt network. If the battery is discharged, then at first the charging current will be 4 amperes, and then it will constantly decrease. After the battery is fully charged, the charger will turn off and the LED will blink, indicating the end of the process. After that you can set "Kedr-M" to recharge mode.
In cyclic mode, the battery is charged for approximately 45 seconds, and then discharged using a connected lamp.In this mode, there is no automatic shutdown and the process must be controlled independently.
Below you can see two variants of the schematic diagram of the charger for Kedr-M car batteries.
Schematic diagram of the Kedr-M charger. Option 1
Schematic diagram of the Kedr-M charger. Option 2
List of circuit diagram elements
The following is a schematic diagram of the circuit board for manufacturing the device.
This charger is designed for charging, recovering lead-acid batteries with a nominal value of 12 volts and conducting training charge-charge cycles.
Power cords and battery connections exit from the back of the device. Unlike the Kedr-M model, there is no compartment for wiring. 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.
Schematic diagram of the Kedr-Auto 4A and Kedr-Auto 12V chargers
In the table you can see a list of elements indicated on the schematic diagram.
List of elements on the schematic diagram of the "Kedr-Auto 4A" and "Kedr-Auto 12V"
The photo below shows a printed circuit board for the manufacture of "Kedr-Auto 4A" and "Kedr-Auto 12V".
Printed circuit board of devices "Kedr-Auto 4A" and "Kedr-Auto 12V"
This is an improved version of the Kedr-Auto 4A charger, which was released in 2008. The manufacturer reports that the charger is designed to charge 12-volt lead-acid batteries.
Charger and pre-starting device "Kedr-Auto-10"
- Improved protection against incorrect connection of terminals, short circuit and overload;
- During the assembly, modern transformers and other components are used;
- Added prestart mode ("afterburner"). In this mode, the battery is charged with a current of 10 amperes. After that, the charger automatically switches to the charging mode with a current of 4 amperes;
- After the end of the main stage of charging, "Kedr-Auto-10" automatically switches the device to recharge with a current of 0.5 ampere. This ensures the most complete charge of the battery and excludes overcharging.;
- The ability to carry out desulfation in a cycle;
- In automatic charge mode, the rated current is 4 A;
- Service life from 5 years, subject to the instructions for use;
- The mass 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 amps;
- Power consumption is up to 250 watts;
- The rating of the rechargeable battery is 12 volts;
- The charger operates on a 220 volt network.
The charging time depends on the degree of rarefaction of the battery and its capacity. ZU "Kedr-Auto-10" has a microprocessor that controls charging. Including prestarting 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. This speeds up the charging process.
There is nothing complicated in using the charger. Even if you connect the terminals incorrectly, the device will go into protection, and you will not spoil anything.
So, to charge a discharged battery, you need:
- Connect the terminals of the "Kedr" charger observing the polarity;
- Set the charging mode "Automatic";
- After that, plug the plug into the 220 V network;
- When charging is complete, the charger will automatically interrupt the process and the end of charge indicator will flash.
We set the "Automatic" mode
To restore the battery in a cycle, you need to do the following:
- Connect a 12 volt car light bulb to the battery terminals. Power experts recommend taking 6 watts;
- Cover the terminals with the correct polarity;
- Turn on the "Cycle" mode using the appropriate button. The charge indicator in this mode will be on constantly;
- Turn on the charger to the network. Automatic shutdown does not work here. The charge and discharge cycle can be chased indefinitely.Therefore, you need to interrupt the process yourself.
Do not forget to unscrew the caps from the cans before charging. After charging or restoring, first unplug the device from the 220 V socket, and then disconnect the terminals.
We connect the light bulb and terminals
In general, reviews of Cedar chargers were divided as follows: 80% positive and 20% negative. It is worth noting that almost all reviews on the Internet refer to the Kedr-Auto 4A model. There are much fewer reviews about the Kedr-Auto-10 device.
In the asset of the charger, users bring simplicity, affordable price and long service life. There were a lot of those for whom the device worked flawlessly for 10 years. And also the owners of "Kedr-Auto 4A" consider the presence of a cyclic charge-discharge mode, which allows desulfation and revitalization of old batteries, to be a significant plus. He helped many to bring back to life batteries that had been discharged for a long time. Of course, we are not talking about the full restoration of the capacity, there is a positive effect.
There are also negative reviews. In particular, some owners write that the device does not automatically charge the battery. In addition, the 4 ampere limit makes it very time consuming to charge batteries with a capacity of over 60 Ah. If we are talking about a capacity of 70 or more Ah, then the owners of the charger wrote that they do not fully charge at all. And it is also worth noting that if your battery was discharged below 10 volts, then "Cedar" refuses to charge it.
The first memory device Kedr-M, bought in 1982, lives to this day, I use it myself and use my two sons + a neighbor - Excellent memory. I decided to give the same to my sons, but unfortunately I could not find it, at that time it was no longer produced. bought Cedar Auto 4 (3 pcs), failed after 2-3 times, The next Cedar 10 A, the son ordered in the online store, failed after the 1st turn on. I don't want to offend anyone, so I won't name all the cedars. except for Cedar M shit, but I do not advise taking it. This is not only my opinion. I repeat Cedar-M, an excellent and reliable charger, it's a pity they don't release it.
Charger Kedr-auto 4A It is intended for charging and restoring the performance of acidic lead 12-volt batteries, partially lost as a result of sulfation and oxidation of electrodes, as well as their training by conducting charge-discharge cycles in order to increase the resource, service life and preservation.
Before using the device, you must study the rules for the care and use of batteries.
- Rated voltage of the supply network, V - 220 ± 11;
- Rated voltage of the rechargeable battery, V -12;
- Charge current nominal, A, not less - 4.0;
- Power consumption, W, no more - 85.
The front panel contains:
- current indicator for monitoring the charge current;
- button for switching on the "AUTOMATIC" mode;
- LED indicating the end of the charge cycle;
- button for switching on the "CYCLE" mode.
The mains supply cord with a plug and the cords for connecting the device to the battery with clips are removed from the rear of the device.
Note: this circuit is similar for the KEDR auto 12V charger, the only difference is that the latter lacks fuses F2, F3.
List of elements to the schematic diagram of the device "Kedr-4A", "Kedr-12V".
I found a KEDR-AUTO 4a charger in the barn, I see: it has a complete transformer and a board in place, there are two diodes (d243b) but thyristors should, there are no buttons, ”+” and ”-” are interrupted. I connect: the LED is not lit, current 4 A, during the night of charging the battery did not boil over.
I decided to restore the charge.
I connected everything according to the scheme, I put the thyristors ku202b, I connect the battery, the ammeter showed 10A, the LED is on, I press the auto button, the ammeter shows 4A, the diode goes out, I let go, nothing has changed, incl. The cycle ammeter showed 10A, the LED is on. I turn on the 220V ammeter, it jumps wildly 0-5A for 30 seconds, then the ammeter seems to be 10A for 30 seconds, so in a circle, the LED is on, On. auto, sv.diod blinks ammeter to it jumps 5-10A, incl.The cycle ammeter jumps madly 0-3A constantly, the sv.diode does not light up.
Disconnect the battery, measure the voltage at the charging output-0.2V
Can you tell me if you can fix the charging? Someone replaced thyristors with diodes, what does it give?
The automation board was out of order, it was converted into a simple rectifier.
sashasim2009: Can you tell me if you can fix the charging? Download the diagram from the Internet, then the usual repair.
With this it is clear. To build from scratch is easy for me, but repair is a dark forest. Who would tell me where to start? I want it myself.
By typing, I found VD5, VD6 is a small gray with a black ring (it should be cd521v), one rings in both directions, the other is silent. While there is no way to leave the house What can be replaced (cd509a, cd522b will work?)
, firmware and work description.zip 109.64 КБ Downloaded: 176 times
Corrected the circuit, added a board to LAY-6.
10А PIC12F629.rar 93.18 KB Downloaded: 177 times
Sorry, I made a mistake. The diode of the PC817 optocoupler, on the contrary, indicated. -). I just didn't bother with the scheme, and I redrawn from the original, and then I ruled in AutoCAD.
In general, I am posting a revised revised diagram indicating the numbering of all conclusions. In order not to produce inaccuracies.
Although it is possible and the way Valeriy L fixed it.
And one more thing - it is better to use 78M05 in the TO-220 case.
.zip 88.92 KB Downloaded: 109 times
I wonder why, again, in your corrected circuit, the diodes VD2 and VD3 are drawn in reverse. Compare the scheme KEDR-Auto-5 on ATtiny13.
-Auto-10A_Nipp.rar 16.68 KB Downloaded: 131 times
I took this circuit as a sample (in the attachment). In addition, on the charger board that I repaired, these diodes are exactly the same and not otherwise. I just checked it myself. But the optocoupler diode in the original circuit (which is in the attachment) was not shown correctly. I also personally checked this myself from the diagram.
And why argue? After all, in principle, it is not so important at what polarity the optocoupler will work - positive, as in my circuit, or negative, as in your version? So and so is correct if the optocoupler diode is set accordingly.
Here, rather, not a repair, but a swap. The charger refused to charge the battery. After lying under the table for a week, it fell under my soldering iron. I'm not a master. I do not rummage in electronics. But ... You don't need a lot of intelligence to understand with the help of a voltmeter that there is still voltage from the transformer. With different methods of connection, the alternating voltage was 12.4 and 25 approximately. Connected to 12 volts. Alternating current. Disassembled power supplies from a PC are lying around. There, on the board, I saw a diode bridge. Are looking for. We solder it from the board and solder it to the terminals of the transformer.
At a current of 8A, the diode bridge heated up strongly. I smeared it with thermal paste and screwed it to a metal plate on which two thyristors were located.
Later I changed the design. Thyristors thrown out (I don’t use them).
Instead of this plate, I installed a radiator from the same power supply unit from which the diode bridge was taken.
I didn't throw out the board. An ammeter works from it. Measured the temperature of the radiator without a fan at 8A. Heated up to 80c.
Put on the fan. At 9-10A, the temperature is kept from 50c to 55c.
Between the diode bridge and the alleged battery, I put a 10A fuse (10A is the maximum declared current that the device can initially issue. I did not exceed it). By the way, now the charger can be used as a power supply.
Charger Cedar AUTO 10. Instructions for use
Instructions for use of the prestarting charger Cedar AUTO 10
• Possesses a high degree of protection against incorrect connection, overload and short circuit of the terminals;
• The model is equipped with the most modern transformers manufactured by the leading enterprise of the Russian Federation;
• There is a pre-start mode - afterburner mode (the battery is charged at a current strength of up to 10A), after which it automatically switches to nominal charging with a current strength of 5A;
• After the end of the process of charging the battery with a current of 4 A, the system will automatically switch the device to recharge mode at a current of 0.5 A.This ensures that the battery is fully charged and does not overcharge;
• There is a possibility of battery desulfation in a cyclic charge mode;
• The warranty period is exactly one year from the date of sale;
• In automatic charge mode, the nominal current is 4 A;
• With correct operation and observance of storage rules, the service life is at least five years;
• The weight of the device does not exceed 0.6 kilograms.
• Charging the battery and restoring its performance lost due to the formation of lead sulfates and oxidation of electrodes.
• Can be used to "train" the battery in order to improve its technical characteristics and extend its service life.
Important information for the car enthusiast who wants his battery to last a long time.
A common mistake of motorists is that they start taking care of the battery when the car can no longer be started. It is known that in the urban driving cycle, a starter is often used, and during a period of short trips, the generator does not have time to fully charge the battery.
Let's take a look at the chemistry of the process
When the battery is discharged, a white deposit is deposited on the plates from the electrolyte. This is a normal process (sulfation). And if you start charging the battery in a timely manner, then it is restored. But if we allowed a deep discharge, the plaque crystallizes, and charging will not ensure the cleaning of the battery plates, the battery capacity will drastically decrease.
That is why it is necessary to recharge the battery almost daily. This means cleaning the plates and keeping the battery in perfect, working condition, extending its trouble-free life for a long time. The Kedr-auto charger allows the car enthusiast to easily cope with this task.
2. The device provides automatic transition to the low-current recharging mode upon completion of charging in the "AUTOMATIC" mode.
3. The charger makes it possible to restore the battery (desulfation), for which the "CYCLE" mode is provided.
4. The model of the device "Kedr-auto-10" provides a mode of charging the battery with an increased current of up to 10 A (pre-start mode). The prestarting mode is provided thanks to the microprocessor, which is equipped with the Kedr AUTO 10 charger. To activate it, you just need to press the “Automatic” button intended for this. The automatic charger system then supplies an increased current. This mode is indispensable in cases when you need to charge the battery as quickly as possible.
5. The device has indicator lights corresponding to the operating modes.
6. The device has reliable protection against overload, incorrect connection and short circuit of the battery cord clamps.
ATTENTION! If the battery is completely discharged, then it is necessary to remove the battery terminals. After 30 min. connect the charger.
ATTENTION! The device works only in conjunction with a rechargeable battery. The lamp connected to the battery cord clamps will not light.
Calculate the minimum insurance price
Desulfation of car batteries, as well as charging and recovery training of car batteries, can be done with a simple charger and recovery device, which regenerates sulphated batteries with an "asymmetric" current. In addition to manual battery desulfation using a simple charger as described in Battery Desulfation. Another method of training a car battery with an "asymmetric" current is known, when the battery is charged in one half-cycle, and the next is discharged with currents of 10: 1. This training method has proven itself well not only for desulfation of the battery, but also for the prevention of serviceable ones.
The picture is clickable.You can take any transformer with a power of at least 200W and an output voltage of 22-25V.
For example, you can use a TV transformer TS-200.
Immediately after the transformer, a relay of RPU-0 type with a winding voltage of 24V or any other is turned on. If you use a relay for a lower voltage, then you will need to select and turn on an additional resistor in series with the relay winding.
The relay with its contacts connects the charger and recovery device to the battery and protects the battery from discharge in the event of a power failure.
The battery is charged during one half-cycle through the VD1 diodes. VD2. During the second half cycle, when the diodes are closed, the battery is discharged through the resistor R4. The discharge current is 0.5A. The charging current is set by the variable resistor R2 and is monitored by an ammeter.
Considering that during the half-period of the charge, part of the charge current (10%) flows through the discharge resistor, then the ammeter readings must be set to 1.8A - the ammeter shows the average current value, and the charge is made for half the period. The relay is, in principle, any with a winding voltage of 24V. It is important that the relay contacts withstand a current of at least 10A.
When using a relay with a 12V winding, we turn it on through a limiting resistance. It is fashionable to replace the KT827 transistor with the KT825, but it is necessary to replace the polarity of the elements, as shown in the second version of the circuit.
The picture is clickable. Unlike the full automatic circuit described in the Desulfation of the battery circuit.
this scheme is simple and efficient enough. It can be assembled from any available radioelements. In this case, it is required to comply with the required voltages and currents.
Cedar auto 10a repair scheme
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Posted by Guest Vlad, December 13, 2013
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