Which charger for a maintenance-free battery?

Question

Hello I have a maintenance-free center future 72Ah. I have an old rectifier that starts from 13.4V and after less than an hour it gives a voltage of about 16.8V on the connected battery. Of course, the amperage drops at this time. Of course, I stopped charging right away. In this battery, you...

kkknc · Answer

Both.

marekwodniak · Answer

I have already had such Center Future for the second time. The first one lasted 6 years and I didn't manage to open it. But I didn't do anything by force.

wojtekbp · Answer

I suggest you buy an automatic. I have had two lidl chargers for several years. I charge the batteries in 2 cars, a garden tractor and a motorcycle. The device is brilliant. If you have more money, buy yourself a ctek or a bosch c3. I appreciate the fact that I don't have to supervise the charging process and the maintenance function that I use on my motorcycle and lawn tractor.

REMUR. · Answer

This week a friend bought such an invention MBC1207 12V 7 stage impulse charger, after two hours with the charger connected, 22 V voltage on the terminals. He stopped charging because the electrolyte began to boil. The parameters in the manual are more suitable for a 24V charger. Unfortunately, I don't know what current was consumed during the charging.

tzok · Answer

Apparently he had found an inoperative copy. The manual says that The 12V charger will turn on this protection if the voltage exceeds 17.5V.

REMUR. · Answer

I think that the folding was made wrong and the system from the 24V charger was put inside. Because it would make sense.

gimak · Answer

In the first one, it was possible to remove the lid, because I also had one and it lasted that long. The second one I bought is not open anymore. And it is enough to add a simple voltage control system to it and interrupt charging when the voltage increases to 14.8V - this is a proposal that has a flair in this direction.

vodiczka · Answer

It is not the rectifier (especially old one) that starts with .... It is the battery that determines the voltage depending on the degree of its discharge and the intensity of the charging current. The more charged the battery, the higher the voltage. Maintenance-free batteries are charged up to a maximum of 15V with an electrolyte temperature not exceeding 25 ° C. The charging process should be monitored and stopped in good time, or:

robokop · Answer

Nonsense buddy. At 22V, a current of at least 50A would flow - I do not think the charger will be able to give back that much.

Waldemar z Kaszub · Answer

You have not written anything about the temperature at which you charged the battery. If outside (without removing from the car) at the current temperatures, it is unlikely to be fully charged and the voltage will increase rapidly during charging.

bejrutmc · Answer

I purchased a vending machine. The battery had 12.4V before charging, after overnight charging it reached 12.8V. We will see how it will keep this tension because the centers are already 5.5 years old according to the production date. However, I will use both. I will put the battery in an emergency with high current in 10-20 minutes to take off as I have already done, and normally I will load the machine.
I am thinking about remaking the old rectifier. Initially, I even thought about including the light bulb in the system to limit the current, and use a meter to control the process and ultimately the conversion. Does anyone have a proven scheme? If only there was a limitation to these 14.4V.

kkknc · Answer

Use ready-made KDSP07 unless you like warmth then KDSNxx

fan_r · Answer

This charger from Lidl is really pretty good. Processor controlled. Here in the forum a lot of admiration has already fallen on him. This is the first rectifier worth having.
With more than 1 car, I still recommend a rectifier with a start. It still depends on which car we are talking about, but there are those that can give 600A. For example, here the specification: http://techsul.pl/index.php?cPath=59

kkknc · Answer

Well, just perfect. @fan_r don't advertise miracles. Because it's a good way to release a modern car. Especially when you don't know what boot is. I do not mention such a small detail as a 110A fuse in a system that supposedly gives 600A.

bejrutmc · Answer

I purchased a Sena charger from a ladybug. Charges the battery without disconnecting the clamps. For now, the battery is on its feet. So I recommend this charger, it has a display and an affordable price.

[Solved] Which charger for a maintenance-free battery?

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