Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

My new vehicle battery giving off the battery fluid from its vents ?

Status
Not open for further replies.
P

phatcreators

Full Member level 5
Joined
Sep 2, 2011
Messages
315
Helped
24
Reputation
48
Reaction score
24
Trophy points
1,298
Activity points
3,458
My new vehicle battery giving off the battery fluid from its vents ?

I think my alternator is over charging the battery ..... How to test that the alternator is not over charging the new battery ?

thank you guys in advance
 

You need only a DC voltmeter to measure the battery. With a good alternator and the engine running at 2000 RPM or more, depending on the load and ambient temperature, the voltage will increase between 13.5V up to a maximum of 14.5 volts.
 
  • Like
Reactions: mihum

    M

    mihum

    Points: 2
    Helpful Answer Positive Rating
Use DC voltmeter in range up to 20V. In good car voltage at battery point should not be higher 13,8V (good regler). Alternator often have 14,4V at alternator point, not on battery terminals, on battery terminals should be max 13,8V (small voltage fall happen because resistance in cables, and other things).

Water from car Lead Acid batteries start to evaporate at 14,2V. In summer on high temp high over voltage and high temp kills battery!

Voltage of alternator depends from type of alternator (type and model of car). If old car old alternator type (clasic) Alternator give 14,4V at alternator terminals and max 13,8V on battery terminals. If you turn on light and fan that voltage goes down. Smart alternator adjust voltage (new generation of car / regler) under load like that, you always have 13,8V at battery terminals.


You have problem with regler, change it !!!!
 
Last edited:
There are more variations of the lead-acid battery in current automotive use. Modern regulator designs usually charge to higher voltages (up to 14.1-14.2V) based on their ability to be charged very quickly, allegedly due to the greater surface area of their plates and the ensuing lower internal resistance… ;-)
 
Acid spillage suggests there's bubbling going on inside. This is caused by too rapid charging.

Wait until you've cured the problem, before replenishing the lost electrolyte.

Since topping up with water will dilute it, consider topping up with acid rather than water. It's up to you whether to purchase a quantity of battery acid and store it (chance of leaking), or to have a mechanic add acid for a price.
 

phatcreators,
When you bought the battery and the seller filled the Acid Fluid, did you check the Level of water ? Was it lower to the Maximum line ? I am afraid the Fluid level is full and not up to the mark (the usual habit of the Battery Sellers). You can check the Charging voltage of Generator/Alternator and the Charging current with a Clamp On meter (now a days DC Clamp On meters available) or you can use an inline ampere meter.
 
13.8 V on battery terminals when connected to the battery posts or when disconnected with the battery posts ?

After how much time the voltage at the battery terminals should be 13.8 V ?

And Raza what to do with the problem that you suspected " Fluid level is full and not up to the mark (the usual habit of the Battery Sellers) " ? How to avoid it now & resolve this issue ?

thanks a lot
 

danishdeshmuk said:
13.8 V on battery terminals when connected to the battery posts or when disconnected with the battery posts ?

After how much time the voltage at the battery terminals should be 13.8 V ?
Click to expand...


After charging, when battery is disconnected, voltage of battery will slowly decreasing to 12,73V.

If battery is new and good voltage after charging, 24h after should be 12,73V @25C
 

I think there’s no problem with the battery, we are only dealing with an alternator - > voltage regulator problems. So he need to start the car and run it at a normal idle and same time to measure voltage on battery connected in circuit.
More details here:
**broken link removed**
 
phatcreators said:
My new vehicle battery giving off the battery fluid from its vents ?
Click to expand...

On the chance acid was added until it rose higher than the bottom of the filler neck, covering any air passageway:

51_1328227600.gif
 
And Raza what to do with the problem that you suspected " Fluid level is full and not up to the mark (the usual habit of the Battery Sellers) " ? How to avoid it now & resolve this issue ?
Click to expand...

The over filling of water in battery will cause the Gas Escaping Vents covered fluid hence increasing the gas pressure inside the battery, finally will result the Water be pushed out of the vents and the Acid mixed water will spread out all over the battery. The simple remedy is to take out the extra water filled. I purchased a new Lead-Acid batter (140AH) and removed the extra fluid which was more than a Litre.
 
so by removing out the extra water the acid will also be removed (with water) ....... and then the acid level would drop down ?
 

phatcreators said:
so by removing out the extra water the acid will also be removed (with water) ....... and then the acid level would drop down ?
Click to expand...

Yes, you can do this. Save it to add later when the level goes down. There really only needs to be enough for the lead plates to be covered.

The acid escaping should not happen more than once. At least not because of trapped air. There's usually a slot cut into the bottom of the filler neck, to permit air passage. (Check yours because you can never be sure.)

Anyway you must not fill it so much that you cover that slot.

My being aware of precautions did not stop one of my batteries from overflowing acid once. Made a mess and warped the linoleum.

I never did figure out the cause. It was sitting in a warm sunlit room.

Perhaps I overfilled it a bit when it was cool. I can't believe the higher temperature caused the acid to expand.

Or maybe the lead plates expanded, forcing acid out the top. But that's farfetched.
 

so by removing out the extra water the acid will also be removed (with water) ....... and then the acid level would drop down ?
Click to expand...
The two levels (min-max) are marked in a way that if the maximum level is monitored the squeezing of water should not allow the lower level to decrease. The maximum intake water by plates and out coming water from the plated remains within the Margin. Once you remove the extra filled Acid Mixture (generally called water) the plates have had already the water sucked in as much as desired, do not make any problem in further working.
 
Well, battery is one of the most important parts of our cars.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top