How to make a charger for lead acid battery proper way 12V 7AH
ฝัง
- เผยแพร่เมื่อ 7 ก.ย. 2024
- In this video I'm showing a proper way to charge your Lead Acid Battery/ UPS battery at home.
For 12V 7AH Battery
Charging current: 0.7A~0.8A (Below 1A)
Charging Voltage: 13.5V~13.8V DC
1) 5A DC-DC Step Down Buck Converter Module Power Supply: ebay.to/2xnW5V9
2) 19V Laptop charger: ebay.to/2MMKeEV
Subscribe channel: bit.ly/2JHtlyc
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charging voltage is 14.4V--14.9V, and charging current is 2A. Too high voltage will cause battery swell or damange. Too big current will be quick charging, However, shorten battery life. I had worked in Leafun Power for 20 years in battery chargers industries.
Hello Zhang, appreciate if you can help me with an advice before buying a battery and charger. I dont know much about batteries and chargers. Do you think this charger here (www.jumia.com.ng/1224v-auto-lead-acid-battery-car-motorcycle-scooter-pulse-battery-charger-200ah-generic-mpg803649.html) is suitable for this battery here (www.jumia.com.ng/blue-gate-ups-and-rechargeble-fan-replacement-battery-21929640.html)? Thanks.
@@spiritme6047 , I checked two products for battery and battery charger. I found this charger power is 220W, that is to say, Current should be about 18A at 12 Volts output. But your battery is only 12 Volts 7AH, So current is too large, it is not suitable.( Although it is very very quick for charging full, battery life will be shorten.)
Advice about charger choice: Smart 12Volts 1.5A (MAX), and charging time is about 6 hours.
www.leafuntec.com/products/sla-battery-charger/12v-sla-battery-charger/
@@zhangeric5353 Thanks
Hello Zhang, some more thought if u won't mind: how do I know the battery is fully charged using the charger you advised? Does it have any safeguard against overcharging? Thanks again.
@@zhangeric5353 what percentage?
Don't you just love these mime school demos !! whats next week ? Blindfolded ???
i've made a bunch of these over the years. i've got them on old printer power supplies, laptop, and tv power supplies. i usually tape, or screw the converter, buck or boost, to the top of the PS. i usually charge with the PS plugged into a power monitor, like a "kill a watt" or similar device, so i can monitor current the whole time. i even charge 9v batteries that haven't gotten below around 8v, by making sure the battery doesn't get more than about .2 watt of power. i charge 18650 cells, and i'll let them pull in between 1 and 2 amps.
that converter you used here, i think, needs a heat sink on the chip for 5 amps.
th-cam.com/video/RG1KNKouQwU/w-d-xo.html
how long such battery will power regular fridge (max 90w) connected to 12dcv-> 500w/220acv inverter with 97% efficiency
@@qnaman this is late I am sure you have figured it out but in the future watts = amps * voltage so your fridge is pulling 90/220 amps since the voltage is 220, if your efficiency is 97% you need about 103.1% more power (1/.97) so about .422 amps. From here devide the amp hour rating which is 7 in the video, by the current draw so in this case 7/.422 or about 16.5 hours
Safe discharge level for an automotive lead acid battery is only few percent due to risk of sulfation, and should never dip under 50%. For a deep cycle AGM battery safe discharge is about 50%. Effectively all lead batteries have only half of the theoretical capacity, otherwise you drastically shorten their lifespan.
Sar how you check the current directly without in my multimeter while i want to check directly like you then make short circuit plz reply how you check 😢
Are you checking the amps directly from the output of the circuit without any load??😳
Set the multimeter to current reading setting, you can adjust the current
Yeah. it's normal to do like that with this module.
I mean.. the wires are the load xD
ya that is not right isn't it?. when you connect it to the battery there will be different amount of current flowing because the different resistance value of the battery
You got everything wrong the current limit is 2.1A and charging voltage is 14.4v to 15v! It's written on the battery!!
13.5v to 13.8v is used to maintain a fully charged battery!
If the charging current is 2.1A you could charge it quickly. But the battery will not last long.
The typical charging voltage is between 2.15 volts per cell (12.9 volts for a 12V 6 cell battery) and 2.35 volts per cell (14.1 volts for a 12V 6 cell battery). These voltages are appropriate to apply to a fully charged battery without overcharging or damage. If the battery is not fully charged you can use much higher voltages without damage because the charging reaction takes precedence over any over-charge chemical reactions until the battery is fully charged. This is why a battery charger can operate at 14.4 to 15 volts during the bulk-charge phase of the charge cycle.
@@LahisTechLT If you leave your charger connected to the battery for many hours you should limit to 14.1V.
But If you want a regular charger and just use your battery when charged, charge at least at 14.4V.
You are not correct about the 2.1A. It's stated by the manufacture, and I'm sure you can charge at 2A with no problem because I use and charge two 12V 7Ah Lead batteries.
I charge them every weekend at 14.4V and 2.1A and after almost 5 years they work just fine and charge just fine.
@@hugopnabais I think it depends if cycle use or standby floating use. Manufacturer give you 2 voltage range choices. For the current i think may be better go little lower than maximum initial current to preserve battery life. Modern chargers will integrate algorithms to monitor V/I on battery for optimum charge and adapt also V/I
So how long does it take for a full charge ?
@hugopnabais how long does it take to fully charge one of these batteries ?
Video shooting setup is better than most other videos on youtube. Quite cleanly done.
Good job! 😊
Ya, and the no talking works here. I hate watching some videos on a certain subject, then they go off on tangents and end up talking about their cat something.
Use a diode on + module out to protect the module from damage.. (reverse current) -when module power in is disconnected before the battery is disconnected
.. . X X
Yeah
@Maria Cabezas ok, schottky diode... i thought any big enough diode would do... i will remember that, thanks :)
Is 40amp diode any good ?
I put an on-off-on switch on the battery to protect it. I.e. battery to either charger or load with centre off. Just switch to off before switching off psu.
Good video, from what I can see on the buck converter it does not have any protections so adding a diode to stop reverse voltage going back into the buck converter from the battery might be a good idea.
Thank you for the suggestion.
and ty as well
i use a shottkey diode on mine too, when i'm charging a small battery like a 9v. if the PS gets unplugged, the reverse current pulled from the battery will kill it in seconds. i don't bother with the diode when it's a big battery.
wilsard Why don't you use it on a larger battery too?
can you please explain what kind of diode and where exactly to put it? thank you
Your video is super helpful! Do you think it's OK to connect load to the battery while charging it.
yes,just keep the battery allmost full at all times. Try to never fall below 50,or even 60%
set 14.33v and 2-3amp for better charge
Low amp charge14.2v / 0.7 amp charge is slower and battery lasts long too
I use 14.1V constantly
The module might need cooling with heat sink. Ensure the chip doesn't overheat, because it is almost 50 watts.
it is ok to put heat sink for cooling when the output is above 3A 35W.) where to put heat sink?
There is no place for a heat sink try to hook up a small cooling fan.
You can get a small heatsink that fits the lm/xl chip , seach "small hestsink 10x10x10" , the ones with glue.. peel and stick on type works well
I made diy heat sink from a flat piece of aluminum. You can shape it the way you want and even wrap around the board.
How can I charge this battery with Solar panel and also how can I protect it from overcharging through solar panel?
Says "proper way".
Doesn't do "proper way".
Don't leave this alone in a home you like.
How to connect the multi meter to measure and adjust the output current
There are 3 sockets in that multimeter for prob cable
Not a correct way
How much time does it take for full Charge
pls can you help me i have bat with 12v 22ah what type of dc to dc converter i need to buy and i have 12v 7ah
How about CSP MT600+
Someone please explain to me why i can't use a common 12v1a adaptor instead. These batteries need about 14v to charge so a weak 12v adaptor can't damage them if left overnight. or I'm wrong?
Ur right men
12 v battery need little higher voltage than 12v to charge
The chemical reaction only works around 2.4V per cell!
In my converter there is no ampere option and my battery says it can quick charge at 2.5 amp
Can i do it?
Bhai without load how you managed to adjust ampere......
is this the right way to measure amps, i thought i have to cut the circle via the multimeter not direct connect black to black and red to red, is that right please anyone know answer my question thanks
Ya, that works in this situation. He is setting the current limit of the module. As you can see it was 2.9Amps, and he turned it down to 0.8 amps to charge his battery.
0.8 amps is the max, as the battery charges that will decrease.
Can i use 15v 5amperes charger in that battery?
No, it will destroy the battery. AmpH should be capacity /10. Means for 7amp capacity battery ,charging ampare should be 7/10=0.7ampares
if power source is 4.7a out can the XL4015 give 7amp?
Max 5A. Typical 4.5A
That is an 5 Amper charger .How do you limit the current?
Will charge faster, but will damage it
How to know that battery is fully charged.can we prepare a display for the same at home.plz let me know
GOOD WORK, SUPER HELPFUL THANKS!!!
Hi Sir Do this module has a cutoff when the battery is fully charged? Thanks
It doesn't but you can let it at 13.4 volts for floating charge
Do the math to figure out how many hours of charging, output in amps and the stated battery Ah capacity.
Can I charge fm-
1.3 (12v1.3ah/20r)
Of course
can I use the battery while charging ?
14v +2amp make it to charge
beware don't follow this video unless u want to celebrate Diwali in ur house
Nice
Sir
I have purchased a 12v 20w solar panel and 12v 7Ah battery for my college project and I have to make a charging circuit for the batter my solar panel is giving direct output of 17 to 21v can u provide a circuit diagram for it
Please sir can u help me I tried a circuit with barebone 1.5 amp solar controller using lm317t two three resistors including a 2k variable resistor and 3a 60v Schottky diode with a capacitor 0.1
lm317 is not charge controller,try with mosfet and proctection diode
Can I use this setup to charge 2x 7ah battery in parallel?
Cant changer cordless battery
I have a 6v 5ah acid... what is a good amp and volt to charge at? I'm a newbie
Should be stated on the battery. I think 0.1 capacity in amps won't hurt.
Lm2596 buck converter is used for sim 800l only it can even error on buck
Hi please help, how many batteries can I charge with 1 charger. 12v 7ah acid
at least 1.
@@sinopulence is it possible to charge two batteries with one charger
Its module no.?
Then searching to easy
I purchased 5a dc-dc step down buck converter module power supply charger xl4015. I am unable to adjust the voltage or amp. am I doing something wrong. Any Help???
Insufficient information to provide meaningful help ;) What was the problem?
Hi Lahis...i am trying to charge a 12v 7ah battery using the XL4015...i set the XL4015 at 13.5v and at 1.4amps..however when i connect the 12v 7ah battery to the XL4015 output both the red and blue lights up at the same time...i tried it on another 12v 7ah battery but the same thing happens...both the red and blue lights on the XL4015 lights up at the same time...what am i doing wrong?...i am using a 19v 3.42amps laptop power supply as my power source...please help me.
Adjust down your Ampere it's very high
Good work. Do you have a link where to buy the module ?
Amazing!
hi can u give me a link for aliexpress step down converter? thanks
MAD 8.54 21%OFF | DC-DC Buck Converter 5A Adjustable Step Down Module LM2596 3A Power Supply Output 1.25V-30V
a.aliexpress.com/_mPnozZJ
How to charge and use the battery at the same time is it possible?
Use, cycle voltage mention on the battery in this video, maybe 14.5 to 15v
I cut my power adapter to an old Dell PC I had and discovered 1 white wire, encased by a braided wire. I'm assuming the white wire is positive and the braided is ground???
yeah, also you can check it using Multimeter.
White wire inside is the id wire.. the outside sheild wire is negative and the outside of that white wire is positive on dell adapter
How about 24v is it can be use converter module power supply?
What if i keep current of 1.5 Amp. It is below 2.1 Amp. Is it safe? Will it charge battery faster?
Its taking my battery so long to charge
.10 volts per 2 hours
yes
Can put solar panel to the Input model?
No, you would need an inverter between that solar panel and the module
How much maximum input current this module can handle safely
There is no limit to current you can supply to this converter. Unlike diodes, boost converters and buck converters (as well as just about any electronic device) are only negatively effected by over-volting. They will only draw as much current as they need. So if your power supply is 12V 50A, but your converter only needs 12v 4A, it will only draw 4A, and the remaining 46A will just be left unused as potential energy. Just make sure your input power supply can supply enough current to the converter, or it will overload.
Most cheap buck converters like the one in this video can only OUTPUT 4 or 5 amps. To figure out how much current you need for your INPUT (power supply), use Ohm’s Law. For example: If your output requirement is 5V 4A, multiply Volts times Amps and your total power will be 20 Watts. Now lets pretend your input voltage is 12v. Divide your total power (20W) by your supply voltage (12V) to get the required current to power your circuit, which in this hypothetical case is 1.66 Amps. I would give a little more current for headroom and power factor, so I’d say in this case your power supply should be 12v 2A.
The best analogy for current I’ve heard is this: think of your device as a dog, and your power supply as the dog’s water bowl. You can give the dog access to hundreds of gallons of water, but since the dog only needs a little bit, they will only take a little bit.
Hope this helps
@@Kini_the_Fox great explanation
@@Kini_the_Fox I wish my physics teacher was as clear as you.Thanks buddy.
12v Ac adapter use kar sakte hai input
12volt ac adopter out put sy dc current hi deta hy
Or ye step down module hy
Jitny bhi volt dc my dogy ye usko or small volt my change kry ga
Can i use 5volt phone charger by increasing its volt to 14volt
no, u cant use bcoz it will give u 6 volts atmost.the regulator will go bad
why this shows green led on when you connect to the low voltage battery?
Because that Lead-acid battery is dead, and even if you "force charge" it to get it back to the nominal voltages, it will be most likely unusable.
Lead acid batteries in general don't like being deeply discharged, and they lose capacity everytime it happens. the one he's plugging into the charger need to be replaced with a new one
How I may know that it has fully charged.how much time it take to charge fully.
Check with a multimeter the battery voltage
How I may know that it has fully charged.how much timedoes it take to charge fully the battery
The LED will indicate once it is fully charged. Time depends on the remaining battery capacity.
@@LahisTechLT Can you not have it stop charging automatically? What about a small over&under charge protection for your batteries? I am looking for something like that.
SUPER HELPFUL THANKS!
Hi, please lemi know which site did you buy the charging module? N.. if I could use it to charge a 2.5 am, 4v lead acid batt? Am an amateur, would be grateful for your help. Thanks.
hello. i have 2 battery lead in serie, 12v 4,'5Ah on totality is 24v
, i need i cherger for this
The battery to be dead?
ea sarkit kahnpay militahai .
Can i use a 15v 1amp charger?
Is it over charge protected??
No...u can use led display and don't do fully charging...
bro can i use 19 volt monitor adapter
No. Monitor adapter has less amps. It may get overloaded and get burnt.
Sir i buy the dc to dc converter so i will gave input using transformer with an bridge rectifier with filter capacitor. If any problem replay me zoon going to assemble
No problem, the problem is that transformer drops the voltage when a load is connected, for example if you have a transformer that can output 15V, when connected to load it drops to 13V or below, so its better to use a smps like laptop chargers.
Very nice project. I have Laptop charger 20V 90W, can I use it? please sir, give me your advice.
yes, but this one is much better th-cam.com/video/RG1KNKouQwU/w-d-xo.html
Hame koi aisa battery with charger batye jisme 3.7 volt se 12 volt tak DC use kare Amazon par hai to link de
BOOM!!! ha ha ha, no thanks bud. PS Why did they have to make charging these batteries so fuggin hard?
this battery is damaged by the way
Fucks sake, yet another one of these videos that lack any commentary or subs.
It doesn't even "Make" a charger, its a ready made PCB....
2.5A ok or not?
Cant you speak?
man you did not make the charger you just bought it
Ohh yes
MA-LÍ-SI-MO....una vergüenza desde todo punto de vista. Los libros no muerden.-
Please make charger using 18-0-18
transformer
Let's make in future. Hope you check this th-cam.com/video/RG1KNKouQwU/w-d-xo.html charger.
Laptop battery charge
yes
Bol nahi saktay
5000000✅🔌🔋🤦♂️🤦♂️
Unless u explain the video is useless
can't you talk and explain better ??????????????????????????????????????????????
i hate music vids ... *clicks off
Your caption is totally wrong ,, go learn more english bro....... you shud put this ...... fo yo caption what to buy or how to buy ..........
I think you should learn English your English is completely out of universe😂😂
😂Fake video😂
Can I have your email ...