SMPS for charger Car battery

[frogz81]

hi i have question, can we remove Output capacitor (decoupling) in SMPS circuits, so we can get pulses while charging?

[sam_sam_sam]

Re: SMPS for charger Car battery

You might be able to that but I would leave in C13

[budm]

Re: SMPS for charger Car battery

It will mess up the feedback signal feeding IC1 PIN 15. the steady DC output is also fed to the short circuit protection in Q6 section, and also feeds other circuits as well.

Why would you want to pulse charge in 50K ~ 100KHz?

[eccerr0r]

Re: SMPS for charger Car battery

agreed, feedback will be ruined and could go overvoltage and overcharge battery.

He wants to "improve" his battery charger into a desulfator...

[frogz81]

Re: SMPS for charger Car battery

yes, i want try make desulfator effect while charging battery

[frogz81]

Re: SMPS for charger Car battery

It will mess up the feedback signal feeding IC1 PIN 15. the steady DC output is also fed to the short circuit protection in Q6 section, and also feeds other circuits as well.

Why would you want to pulse charge in 50K ~ 100KHz?

Can we add Inductor and Decoupling Cap at Feed back path?(filter only at feedback path)

[budm]

Re: SMPS for charger Car battery

Can we add Inductor and Decoupling Cap at Feed back path?(filter only at feedback path)

Look at the circuit, you can see the DC output V+ and V- are fed to other circuits as well, not juts the feedback circuit only.
I also do not know if pulse charging at 50 ~ 100KHz will have any effect on de-sulfating or not. Do you know? Need to do more research.
You can try building some thing like this:
https://www.electronics-lab.com/proj...cid-batteries/

https://www.homemade-circuits.com/ba...uit-explained/

You can build this add on circuit which may be the best way to go without messing with the charger


Learning:
https://researchrepository.wvu.edu/c...26&context=etd

Notes:I did not look at the schematic to see if they are correct or not but at least it gives you the idea on how to pulse charge the batteries.

[frogz81]

Re: SMPS for charger Car battery

Look at the circuit, you can see the DC output V+ and V- are fed to other circuits as well, not juts the feedback circuit only.
I also do not know if pulse charging at 50 ~ 100KHz will have any effect on de-sulfating or not. Do you know? Need to do more research.
You can try building some thing like this:
https://www.electronics-lab.com/proj...cid-batteries/

https://www.homemade-circuits.com/ba...uit-explained/

You can build this add on circuit which may be the best way to go without messing with the charger


Learning:
https://researchrepository.wvu.edu/c...26&context=etd

Notes:I did not look at the schematic to see if they are correct or not but at least it gives you the idea on how to pulse charge the batteries.

thank you BUDM for your response. I will stick with original SMPS

[budm]

Re: SMPS for charger Car battery

Please do the follow-up on this project, thanks.