Auto turn off for battery charger
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- čas přidán 10. 09. 2024
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2nd part • DIY Automatic charger ...
3rd part • Auto turn-off for car ...
Not a bad design for a simple circuit. The tempco of the transistor and diodes may actually be good, as it will turn off sooner at higher temperature, which may match the recommended voltage for charging. A zener is better but there is still the Vbe of the transistor. A much better design can be done with a small PIC, costing well under $1, which has internal comparators and voltage references.
How does the circuit measures the battery voltage while its plugged to charger? The pcb will not see the battery voltage because its lower than charging voltage? When i plug in charger and measure the voltage at the battery terminals multimeter just shows charging voltage of 14.4V
Good explain ...please next project for equalizer battery ....👍👍
In actual practise, rhis circuit does not work well. Cut off voltage drift with temperature and age.
Hi Kasyan, nice one. Is the schematic at 3:14 a reverse engineered board from China you show on 3:05?
Also, what is a .lay file type in your zip download? Thanks +1
In the first scheme, the battery is disconnected when the relay turns off. Hence the circuit will never see a voltage drop!
what is the two resistor in use of 555 auto turn off kit
If I used 24v relay to 24v battery can it run normaly??
Cant run which component are change to run it normaly??
thanks a lot, hope to see more videos on design a flyback transformer also for smps EE type
Charge must reach 14.4v.
13.7 is standby voltage.
will you please make a li on baytery auto cut off circuit and full charge indecator. with easy components.... please
in case of loop, what is solution? need no need reset push button?
hi, friend thank for automatic battery charger circuit, I just build one and work well, but relay contact is too hot I use relay 250vac/10a for cut main Power if my battery bank reach 14.4vdc...I install on my capacitive charger desulfator, how much ampere value for the relay?thank you.
Use car Relay, starter relay and a transistor NPN to GND. A car relay should have a diode in it already for inductive off spike, just make sure you have right relay_ diode polarity.
for me it doesn't work. Any help? please!
How can I modify this circuit to operate on 24v?
What's the volt of 4732 zener diode. Plz reply
Excellent presentation and useful information
Sir how to charge 4 volt battery with this device ??? Please tell me.....
Do you work circuit for turn off 28V DC max?
Nice circuit, nice video, thanks.
where to add red and green led for notifications. plz upload pcb circuit in image format because .lay format not opening properly plz upload 555 circuit in image format
Kaushal Patel the lay format seems to be and error or something I would like the correct image or word file too please. thanks
Is it work on 24 volt?
what software your using creating diagram? 00:50
Thanks s lot for this nice , simple and effective cct, plz can you tell the changes must be done to use it to charge 24 VDC battery , with thanks
Using voltage to determine charge level for lead acid is not a proper indicator of its charge. Charging at constant voltage of roughly 2.4 volts per cell and limiting the current going into the battery at 10% to 30% of its rated capacity, then charging it at that rate until the current being taken by the battery falls down to about 3% of its rated capacity is the proper way to determine if the lead acid battery has a full charge. You can use your circuit but you need to add a current sense resistor and monitor the voltage across it to sense when the current has dropped to the proper voltage that represents the full charge current point of your specific battery's capacity.
Would you happen to have any links to such a design that could be purchased to add to my old transformer battery chargers?
Superb explanation in video. Could you adapt the diagram to recharge 1.5V alkaline batteries?
In french below.
superbe explication en vidéo. Pourriez-vous adapter le schéma pour recharger des piles de 1.5V alkaline?
Until how many of these A circuits work
If 6 volt battery what is parts value ?
how can this be modified to cut off at 65 volt
can charge mobile. with relay 5 volt
NAY NAY NAY NAY ....... NEITHER GOOD NOR BAD BUT ALSO CREATIVE ACCORDING TO DIFFERENT SENSE
Don't lead acid batteries fail to come up to a full 12.5 Volts when they reach middle age? So using this with an older battery this might never shutoff and it will cook the battery.
Noah Spurrier no sir, while charging every battery reaches 14.2-15 volts, in fact older batteries get charged quickly because they can't absorb a lot of current due to their decreasing capacity, so their voltage rises quickly.
I have noticed that you use the word scheme often in your videos. I assume you mean circuit as i have never heard the word scheme used in electronics. The graphical representation of a circuit is a schematic.
*Scheme*
skēm
noun
1. a large-scale systematic plan or arrangement for attaining some particular object or putting a particular idea into effect.
-This is the odd definition that someone has probably taught in an English class somewhere. At least in American English, no one uses the word in this way. "Scheme" is used as a verb by most English speakers and it has a negative meaning.
verb
1. make plans, especially in a devious way or with intent to do something illegal or wrong.
The word may be technically correct but I have never heard it used to describe electrical circuits.
noun
1. a plan, design, or program of action to be followed; project.
2. an underhand plot; intrigue.
3. a visionary or impractical project.
yeah without the video and only the audio, I would think of something else, but up till this point I know he's pointing at the circuit because of the video
why the nit picking? english is not his first language and he is doing a great job with the electronics. this video is not about his english. u know what he is referring to so cut the BS
John Conrad
I had no intention of "nit picking." My personal philosophy is to always try to improve myself and my skills. I hate when people avoid telling me I'm doing or saying something wrong. Like anybody, I don't want someone telling me every little mistake I make, but when that mistake is distracting from my objectives I expect people to kindly let me know what I'm doing wrong, and especially why it's wrong.
can i use c1815 transistor ?
Kasyan TV you are a perfect
The only problem with most of these circuits: They will switch on again, when the battery voltage falls down a half Volt after switch off the charging current.
in fact that is not a problem. when the battery voltage falls it gets another small charge which will keep repeating and will behave like a float charge
Fusimester you can wire the relay to latch itself until power is cycled or put a momentary switch to make it unlatch
John Conrad No, it will behave like an annoying switching on and off non stop " click-click-click" unuseful circuit. Fed up of trying this kind of circuits and all of them have the same problem of not tolerating the half volt drop when it disconnects power charge to the battery.
Can I use this a charger for li-on batteries?
Young Tesla No it is for 12 volt batteries such as lead acid batteries!!??
is it posible to replace some diodes with more known ones like 1n2007 for the all cirkut
yes
John Conrad thank you
1N4007, you mean
Low Bateray Diconected?
What is the voltahe restart?
can I use this for 100ah battery
Auto turn off for 18 volt battery charger similar like this with relay_???
18 volt relay,sorry.
What is the input voltage
very interesting channel. subscribed
can I use 24 volts relay please
Hi do you have an email for contact need your help please, I look forward to your reply.
excelente vídeo amigo
hey man!
thank you popr the video. a question. if I make two circuits of these, can I make it cut when it is charged and another to start charging when the battery is discharged? Greetings from Colombia.. help me please
auto turn off and on?
he put up links to buy this at albaba....the item for sale is just that....everything is in Russian, but the 3rd link has a description in English....I bought 6 of these for my E-Vehicle....I may be using the cut-off for balance discharging to cut-off the load.....I have overcharged 1 block twice already cus I charge all 6 together with 84V.....one of them is quicker cus the SOC is higher or the capacity is lower
Nice...
I like it 😘👌
wh do use 2dio
de
Provide circuit diagram plz..
How to make a 9v automatic hcarger
Very cool
Good idea
will it work on lithium?
Not if you want to fully charge it safely.
PirateKitty is it because this is not precisely accurate enough due to the relay?
DO NOT TRY THIS WITH LITHIUM.
this is ok for car batteries. Lead acid batteries have a wide voltage range for charging. LiPo does not and it is a highly unstable battery to do short cuts with. This is not a precision circuit and the cut out voltage will change with temperature. it is ok for 12V car batteries.
Don't take this circuit, use a special chip tp4056 for Li-ion
the relay contact resistance is very low and is not significant. LiPo requires very precise charging and this circuit is not precise. depending upon room temperature changes it may overcharge the battery which can cause it to explode and catch fire. that is why IC's specifically made for charging LiPO are used. The circuit is good enough for Lead-Acid batteries which have a very wide tolerance.
uniquely like
Just beginning from the simpler one.
nice video
Auto Cut off 24V battery Charger please uplode video
YES, CIRCUIT OR SCHEMATIC!
Available in india
We need such circuit lithium ion batteries😃
Super 👍
Nice Circuit
Excelente
i want to make auto power cut off circuit for 7.2v chargeable battery
It's not good work.
hello that nice
Sir your language
Voice Englich Convert To language to urdu....plz plz plz
contact me if u want to understand this or want to mae i will do for u free
О, Ака Касян на буржуйском
мда уж
Nice video, but the design is a BAD long term charging solution for a LA battery because the cut-off circuitry NEVER allows the batt to achieve a full saturation charge -- which would of course shorten the useful life of any LA battery.
*The design lacks 2 charge circuits:*
1. A full saturation charge circuit. CV must be held constant while CC
drops to 3 to 5% of batt capacity--then cut-off should occur or a float
charge circuit should be enabled (if desired).
2. A float charge circuit. After a full saturation has been achieved,
charging V should be decreased to ~13.2 to 13.5V to maintain a full
charge on the batt.
*The design lacks 2 temperature control circuits:*
1. A safety cut-off circuit (for when a battery over heats)
2. An auto-adjusting temp-voltage control circuit -- to auto-ajust the charge V as the temp changes.
Did he call this a battery charger? Auto-Turn off for battery charger. Looks like you lost sight of the prime objective. yeah one can add all that (which is not shown in the "schema" and then it becomes something else.
+John Conrad
re: "Did he call this a battery charger?"
No... and neither did I call his circuit a battery charger. It is obviously part of a battery charging solution--and not a very good addition--as I quite clearly pointed out in my original comments.
re: "Looks like you lost sight of the prime objective. "
It looks like you have trouble reading or comprehending what has been clearly conveyed in words. Try not to embarrass yourself next time you feel the urge to frivolously respond to someone else's thoughtful comments.
peace.
after rebuking me like a jackass u end by saying "peace"? stupid ass. you criticized his design and went off at a tangent and then u complain when i correct your frivolous idiotic comment
AKA, нужно больше видео
Traslate spanish
hi lowe jour wideos
LOL cool
alyo / 🤣
😁
Subtítulo español
Could you make a similar with an op-amp?
yes u can use an op-amp instead of the transistor and it would work a lot better. in this case he has the Vbe of the transistor plus the two diodes so the temperature coefficient which is 6mV/Deg C which will not be good. With an op-amp u dont have that problem but u must use a stable Voltage reference, but then it becomes a completely different circuit. he is trying to make something simple and basic