Charging the battery - can it be recharged without disconnecting it?

Question

I have a question for electricians or electronics who are well versed in car electronics.

Is it possible to recharge the battery without disconnecting it from the installation, using normal chargers? The car is a 1998 Ford Escort.
greetings

bandzior2 · Answer

Disconnect the battery from the installation and it is best to remove it so that the splashing electrolyte does not damage the bodywork.

jacur · Answer

And what are you cooking electrolyte in the battery? While driving, you will also disconnect the battery so that the electrolyte does not spill out while driving on the torn asphalt ?? If possible, connect the charger to the battery and charge it without removing it from the car. Not exceeding 1/10 C.

kierbedz4 · Answer

Charge the battery installed in the car. Do not forget to loosen the battery caps if they are installed in it. Charging with 1/10 of the battery capacity in no more than 10 hours. During charging, open the hood of the car to ventilate to prevent corrosion in the engine compartment. disconnect the charger from the mains and then the cables from the battery, never the other way around. This way you will avoid sparking of disconnected cables from the battery that could cause the gasified battery to explode and burst.

telwisalfa · Answer

Hello.
With this charging of the battery not disconnected from the installation, I would not be so sure, I know cases of damage to the charging current regulator with such a rectifier connection.
Pozdowionka.

mklos1 · Answer

Hello!

I advise you not to experiment with charging the battery that is connected to the installation. You can leave it in the engine compartment, but the clamps must be removed. And of course you have to unscrew the caps on the cells.

cofe · Answer

I know the rules of charging, of course. Until now, I disconnected the clamps and connected the installation to a small 12V power supply, so as not to delete the entries in the radio and computer. The battery is maintenance-free.
I just meant opinions on whether to charge connected or not. I read somewhere that there are chargers for charging through the cigarette lighter socket, so charging would have to be done through the connected battery.
Greetings.

mklos1 · Answer

Of course, you can charge the battery connected to the installation, provided that you are sure about the method of charging. I read about using impulse current to charge deeply discharged batteries, but this is unlikely to be found in standard chargers. Still, this uncertainty remains. In the event of any failure, whether in the charger or in the battery, the losses will be greater than in the case of charging outside the car.

mczapski · Answer

I only have a dilemma what the term normal rectifiers means. But I imagine they are devices designed to recharge lead batteries. As a result of their work, the voltage at the battery terminals is set to 14.2 - 14.8 V. If so, there is nothing to discuss. Yes of course. He recommends to theorists on various problems removing the battery from the car while driving. Then it also charges and there may be an unforeseen failure, including voltage increase over 15 V.
Buddy mklos1. 230 V can still be found in a vacuum cleaner, soldering iron, etc. So don't we turn them on in the car? Advice on what if.

mklos1 · Answer

The rectifier is connected to the 230V network. If only that is why I would take ...
It can always be said that there is a fuse, a transformer etc. But if there is a guarantee that nothing will happen, I do not sign it.

cofe · Answer

mczapski - this is how I mean an ordinary rectifier from a store like many in supermarkets. I've heard a lot of opinions, but everyone says "I think", no one will say specifically.
I think that if there are any contraindications, it is specific and not rather not because, for example, the computer may be damaged. Something can always get damaged. Even when connecting a charged battery to the installation.
A lot of damage to electronics occurs just during connecting or disconnecting the power supply.

telwisalfa · Answer

Hello!
This Forum is to share your knowledge and experience in the field we know. The author of the post asked a specific question and if we want to help, we should answer it as best we can. Searching for a definition for a device with which the batteries are charged will be of no use to the questioner. We know exactly what the rectifiers used to charge the batteries are ... better and worse. We also know that the battery can withstand more than the car electronics, so the questioner should pay attention to it. However, the greatest risk will be borne by the author of the post by listening to one of us who prompts us.
Greetings.

nitroxsz · Answer

I have been charging the car battery for a long time without disconnecting it from the installation, and I have never had any problems because of it.

And anyway, if someone has a car with a gasoline engine from the VAG group with the famous throttle adjuster, after disconnecting the battery, he will probably have to adapt this adjuster.

This is my opinion which probably many will not agree with, but that's their business.

Charging the battery - can it be recharged without disconnecting it?

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