Recent content by RayE

Ok, I see they are very different ?

They are different?

What port on the JK BMS are you using?

Hi All, I have written some software that monitors the parameters from a jk bms using an ESP32, all is good and working well. The only problem is I'm using the GPS port that is TTL and suseptable to noise, I could fit a TTL to rs485 converter then another at the esp32 end but I noticed the...

You can also start the BMS with a multimeter. Set meter to "diode test", positive (meter) to battery negative, Negative (meter) to load negative.

That looks the business. Here is one I'm looking to buy for a lab power supply/charger. 0 to 60V, 18A, wifi, graphing function. https://shp.ee/u926svn

Non off the SMPS we are discussing have CC but do have a crude form of SC protection. Back feed protection is already built in (see the schematic posted a few threads back) basically it's a half wave rectifier fed from the isolated side of the main transformer.

That's interesting, the PWM SCC is based on switching max volts and current from the source on and off as quickly as possible that then achieves a so called ideal (average) evel to charge the battery? The major problem here is there are huge current spikes when the PWM duty is active, this...

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The SMPS potentially will make a different noise under load and the noise level depends on the quality of the build. I have on a couple of occasions taken the real noisy ones apart then use an insulated tool to "press" on any inductor/transformer in there. If the noise reduces then get your...

Yes we know that. The SMPS is feeding it's output into a PWM SCC, because the. SCC is pulsing (PWM) into the battery then the question was how does this affect the output of the SMPS? There will be some effect like increased ripple? On the SMPS. If he were to use a MPPT SCC then there would...

Yes it will if you start modifying the feed back circuitry and potentially upsetting other parts of the SMPS........definitely NOT recommended........fizz, poff, bang with smoke springs to mind ?

I would certainly not want the SOC algorithm to reset at zero ( user definable). It would seem safer to know how many AH have been used in the charge process to bring the battery to the top knee, this feels safer. Anyway, once I have my JK BMS logger finished then I can determine where these...

Theoretically the lithium load is a MASSIVE capacitor that will more than sink any spikes from the SMPS/SCC PWM coupled with the fact that the SMPS has short circuit protection. I'm guessing even the SMPS will be ok.........but don't take my word on that ?