Topic: Battery Charger in My Car

[Andrew99]

Hi, all

Most importantly, thanks especially to read my post.I need to make an auto battery charge after I saw an article presenting something about it. All things considered, I might want to ask some assistance.

As the exposition appears, This auto battery charger circuit can be utilized to charge 12V and 6V batteries. On the off chance that it is utilized a transformer that can convey 4A to 5A at a voltage in the vicinity of 12.6V and 16V then we can dispose of the switch for 6V or 12V batteries. The schematic is given beneath.

It likewise gave some support tip about the auto battery.

The auto battery charging current is consequently constrained to 4.2A. On the off chance that there is a 600mV voltage on R1 (4A through it), at that point, the T1 transistor begins to direct. Inordinate charging current is stayed away from in light of the fact that the present estimation of T3's base is constrained. The distinction between connected load current (at T4's authority) and genuine voltage of the battery are adjusted through T4's gatherer producer intersection. According to the datasheet of 2N3055AG https://www.icrfq.com/part/1926205-2N3055AG.html

The power contribution of 2N3055AG is the result of load current and voltage distinction as of now said. While charging 6V auto battery this power achieves a greatest of 40W. The rectifier diodes must have the capacity to convey 4A at 40V. T4 2N3055 must be mounted on a decent heatsink keeping in mind the end goal to scatter the warmth.

Nonetheless, I can't comprehend what byx21-40 is?

1) Is it like a diode rectifier ??

2).and what is 21-40 implies like between 21-40 or simply it's datasheet code (since I scarcely discovered it on google)

3).and if it's being sold similarly as it is and consider the possibility that I didn't discover it in the market.

Sorry for every one of the inquiries yet I'm a mechanical specialist and gadgets is a leisure activity for me so I'm not proficient.

Much obliged to you once more,

[TwoTired]

The link shows me a blank page.
Was it a schematic?

[Andrew99]

The link shows me a blank page.
Was it a schematic?

Hi,
There is not a schematic, I can open it.

[TwoTired]

I don't see how anyone can help without a schematic, or circuit description.

Well, I can't, anyway.

Good luck!

[TwoTired]

Oh, I can find datasheets for the 2n3055.  I've used this part before.

I can only guess that there is an app note that is embedded with the Linked data sheet that includes a battery charger schematic.

Need that to determine associated parts function.

Cheers,

[Andrew99]

So, can anyone please help me regarding my inquiry?
Thanks.

[1080]

Can You take a photo of the item or schematic of what you are trying to follow?

[RAFster122s]

Are you trying to build an automatic battery charger for your bike or an automotive battery charger?  For small 12 an 14 AH batteries used in our bikes the slow charge rate is C10, that is 1/10th of capacity.  So the charger would only need to deliver 1.2 -1.4A and giving it nearly 4.5-5A can boil the water out of the battery.  It will result in a very hot battery when charging.

If this charger design is on the web give us an address to look at.  Otherwise you are asking us to give you answers when the details needed for answering the questions are not provided.

David