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Maintaining UPS/Car batteries

Three years back I got interested in analyzing the procedure which is used by battery maintenanceshops. They purchase Sulphuric in drums and then mix it with tap water in 66 % by volume. They saythat chemical reaction causes the water to boil which remove the oxygen molecules from the mixture

hence results in giving up gravity of 1250 which they pour it in car batteries.

Batteries run fine for minimum 2 years where as I think if it is all about removing impurities from carbatteries then they are making a mistake by adding tap water which would off course boil the water butwould not guarantee the removal of impurities present inside the water. I have six batteries of 200Amps each in my office which can support 15 computers running on them during heavy load shedding.In order to over the Myth I have also purchase the drum of Sulphuric Acid and have mixed it withdistilled water which I have produced it in my own lab. I took all my batteries outside and have flushed itwith tab water to remove all the deposits present inside the batteries. Flush was performed multipletimes then batteries were refilled with Acid of 1280 gravity prepared within my office compound. From

last three years I have been maintaining the gravity of my UPS batteries up to 1280 by mixing the acidand distilled water as required. Even at the end of third year my batteries are able to provide 90 %backup time as compared to which it gave at time of purchase even after excessive load shedding of 1hours with5 -6 times a day from last three years. Flush is a periodic exercise which is performed at leastonce a year also I have adjusted the output of my UPS to charge per battery at rate not more than 8Amps.

Similar procedure was adopted on all my three car batteries which have been running fine without aproblem from last three years with mileage more than 80000 km each.

I would like to hear about your thoughts on this but I would not recommend you to try this procedureas tremendous amount of heat is generated during the mixing process which can easily damage anyindividual who is doing this for the first time and also you have to leave the mixture in Plastic bucket forcompleted one day to allow the mixture to cool down.

2 nd :

Normally you would have noticed that once you have purchase new batteries then after three monthsbackup time reduces drastically and normally batteries are taken to batteries shop where they chargeyou minimum 500 Rs for fixing the batteries and charging it on Tanger. If you have hydrometer then youwould notice that this happens either due to decrease in volume of liquid inside you battery or specificgravity of mixture inside the battery is below 1200.

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Normally people make a blunder of putting tab water inside the battery which directly affects yourbatteries back up time or try to purchase the battery fluid from local battery shop at Rs 10 or Rs 15 perbottle which is nothing more than distilled water and I have my doubts that the water is not properlydistilled.

I would recommend you to keep the mixture of Sulphuric Acid with you all the time with gravity of 1280which should be poured inside the batteries if you notice the drop in specific gravity of Acid inside thebattery and secondly you can produce the distilled water inside you home if you have a pressure cooker.Place a small pipe on top of pressure cooker where you can divert the stream from pressure cooker to aplastic bucket and hopefully if pipe is bit longer then you will get distilled water at other end.

As far as battery flush is concerned, this can be done once a year by draining entire acid from batteryand then inserting the tap water inside the battery and draining it for multiple time because this wouldremove the deposits in between the plate and from bottom which will eventually kill your batteries.Then you can fill the batteries with fresh mixture of Acid. Never pour pure Sulphuric acid inside thebattery and if you have prepared the mixture of Sulphuric acid with a procedure which I have told youthen allow the mixture to cool down otherwise you will not like the results. Normally peoplerecommend that flush be performed with distilled w ater but I believe that it wont be readily available insuch a large quantity so reserve it for later use.

Secondly I would like to highlight that people at time drain the acid from the battery and afterperforming the flush. Pure a mixture of (Espom Salt + distilled water heated at 66 C temperature) insidebatteries and then shake the batteries so that mixture can make its way to every cell. They allow themixture to cool down and then put the batteries on slow charging of 4 Amps for about 24 hours in orderto remove the Sulphate deposits from the batteries. This procedure is used to recondition your oldbatteries which can still provide you with an output of 10 Volts minimum and then batteries are goodenough for one more year. You will have to discharge and recharge it for multiple times. After a day ortwo then perform another flush and then pour the new mixture of acid onside the battery.

Entire purpose to highlight the entire procedure was to outline the mistake which our Laymentechnicians make at battery shop. They prepare the Mixture of Sulphuric Acid by mixing it with Tabwater which eventually produces a lot of heat where they claim that this in turns creates a mixture ofSulphuric Acid and distilled water with specific gravity of 1250. (Wrong Procedure) as the impuritiesdirectly attack the cell of your new car batteries and reduces the life to .

3 rd :

Dear Brownrose78

First of all whenever you buy a UPS then ask the technician to adjust the charging rate to MAX 12 AMP& MIN 8 AMPS. Secondly buy a hydrometer along with the batteries and ask him to provide you with aPlastic bottle (size of 2 Liter Plastic Pepsi bottle full with Acid with gravity of 1280). Perform a Periodiccheck on your batteries (2 months for Brand New & 2 Weeks for OLD batteries) with hydrometer. If yourgravity is between 1250 to 1300 then pour the distilled water inside your batteries and if gravity is less

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then fill it with the Acid purchased. I have noticed that for some reason the gravity of UPS batteriesnever remains same and for this reason it does not provide you with same backup time.

Always remember that if you have lost the liquid level inside your battery and forgot to refill this thenprobably your batteries have experienced a heart attack and it would be difficult to recover it back to its

optimal performance. In your case you batteries have experience a heart attack along with excessiveover charging for long period of time as your UPS has been trying to charge your batteries at @ 25 AMPSwhile trying hard to bring the Voltage back to 14 Volts.

Charging a battery at @ 25 AMPS means that you are wasting power which should comfortably be ableto run your 2 home Air conditioners. Your case is a typical example of what many people are doing thesedays. You can try the procedure which I have highlighted above but looks like you will have to buy newbatteries.

4rth:

I bought 20 Liters drum of Sulphuric Acid for 400 Rs which should be enough to produce enough mixturefor 5 washroom Baltis of Acid. 1 balti would be consumed for one 200 AMPS battery.

1) Always pour Acid on distilled Water not distilled water on Acid

2) Wear Rough Clothes, Glasses and gloves if possible.

3) Keep the Acid and Mixture out from the reach of Children

4) Lot of heat would be generated during this process & be very careful.

5) Always Use plastic balti not Metallic

6) Mixture will take 24 hours to cool down

7) Never pour the mixture inside the battery once it is Hot

8) 64 % distilled water should be Mixed with 36 % Acid

9) You may end up getting a gravity of 1400

10) Keep hydrometer with you and only check once fluid has cooled down

11) You can perform later adjustments by pouring more distilled water on the mixture once it hascooled down and at that time no heat will be generated.

12) Use 2 Liters Pepsi plastic bottles to store the mixture

13) Label it Very Dangerous Sulphuric Acid with Gravity balabala

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14) Keep it in safe place where no one other then you can touch it

15) Balti used for producing the mixture should never again be used for taking bath.

16) Entire exercise will have no meaning if you are not using distilled water.

Do it at your own risk and dont allow anyone to miss use the Acid for hurting anyone otherwise you cango to jail.

5 th Reply :

In fact 6 UPS batteries of 200 AMPS which makes a set of three with two batteries each used to give mea backup time of 4 hours under full load once they were brand new. Back up reduces the entire year andonce it reaches 2 hours then I normally perform this exercise and again gives me a backup time of 3.5hours. Provided you have maintained your gravity entire year and never allowed it to go dry.

I also have other equipment connected with this UPS such as three tubes and 2 fans. Its a local UPSwhich is available in every house these days.

1) These UPS have a PCB card which has many variables.

2) These variables can be adjusted using a screw driver

3) During load shedding the Output of the UPS is much more than normal electricity

4) adjust the variables such that your Output Voltage should never exceed 265 Volts once batteries are

fully charged5) adjust such that once output voltage reaches 223 Volts then your UPS should trigger the alarm andshould shutdown within 10 seconds.

6) adjust the charging rate such that you each battery should not get more then 10 A while charging.

7) If you have number of batteries connected in parallel then 10 AMPS at maximum should passthrough each.

8) Slow charging is very good for batteries but if it is slower than this then you wont be ready beforethe next load shedding.

9) UPS should stop charging your batteries once the output voltage of both the batteries reaches 28Volts or 28.8 Volts.

10) During Load shedding once output of batteries (where two batteries are connected in Series)reaches 21.9 Volts then Alarm should be triggered and UPS should shut down.

11) This voltage should correspond to 223 Volts at output under load.

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12) Always keep your UPS line separate from main line

13) Always test under full load so that you are aware about the maximum load that your UPS can take.

14) Your UPS should shutdown immediately if load exceeds the maximum load.

15) Now your computers should be safe under these configurations.

16) You will need a good quality Voltmeter and AMP meter.

17) Since chemical properties of batteries changes the entire year so you will have to check youre tuning after every three months.

All these parameters are controlled by the variables present on the PCB card. Best is that you go to aLocal UPS shop and ask them to adjust these variables according to the specification and see how theydo it. Take a paper tape and mark each variable so that once you d o it then you dont forget it.

ALWAYS TREAT ELECTRICITY WITH RESPECT OTHER WISE YOU MAY NOT LIKE THE RESULTS

6 th Reply:

If your cooling coils of your AC is clean and it does not grabs dirt on its way then probably you should getclean Water. I have used a Pressure Cooker with small plastic pipe inserted on it which was thenconnected to Air Conditioner cooling coil (pipe) and that part was dipped inside the another bucketcontaining cold water so that it can act as condenser. Last end of cooling coil was again connected withplastic pipes using clips then distilled water was collected in another bucket.

Process of distillation involves converting water into steam and then condensing the steam into water

and collecting it in another bucket