It does not, they exist, but are made of the same plastic of the case.
It's a cheap Chinese charger, most likely there is no Kind of voltage regulator inside...
Instead of presuming you can do some actual testing:
Was already considering that as the easiest way to solve this. Will make a new charge to to have more consistent results.and once sure, buy a new charger.
This would be my recommendation..
A typical Li ion battery BMS will start over voltage protection at 4.25vdc plus or minus .025vdc which with a 7S battery would be 29.75 total vdc. So it may well be a defective charger with the BMS saving the battery pack. Although the charger was verified as having an output of 29.7 volts. Close.
Already purchased it, waiting to deliver.TommyCat wrote: ↑Jun 24 2019 10:01pm
That's why double checking with a known good quality multi-meter is a good idea. Perhaps the display's reading is off.
something like this:This would be my recommendation..
However with the above charger I am limited to 29.0 V. Can not choose to charge till 29.2 V (for example)But actually, if you care about making your battery last longer, it is better to slightly undercharge it, so you might want to stick with something between 29 and 29.4V if this works fine already. It won't make much difference in terms of range, but it will make your cells live a longer life.
Why do you say that? because of the overcharge issues?not adequate for properly charging a Lithium Ion battery pack.
what should I look for in the charger´s specs in order not to be cheated?Look for a specific "charger" for a 24 volt nominal Li Ion battery, at 2 amps or less charging rate.
Ok let me show you my view of that chart:As you can see from this chart, charging and discharging more toward the middle of the battery's nominal voltage zone will help prolong it's life.
No safeties at all. And no cc/cv operation Please take a closer look at this thread to see what a proper charge is all about.
Bonus if you get the same connector. And naturally that it uses your supply line voltage. (example:120volt) Staying at 2 amps current rating is ok. If in doubt post a link! A reputable dealer is recommended.
how about this:TommyCat wrote: ↑Jul 06 2019 6:55pm
Look for a specific "charger" for a 24 volt nominal Li Ion battery, at 2 amps or less charging rate.
did not have the opportunity yet...Most importantly have you verified that your motor runs at 29.4vdc???
Interesting. Using your charger as a power source and shutting off at your determined set-point. Would not be my choice.(I don't think it allows cc/cv) But if your determined to charge below 29.4 (or have too), perhaps. Beats diodes...omadawn wrote: ↑Jul 09 2019 11:55amhow about this:
https://www.ebay.com/itm/12V-24V-36V-6- ... 2142484009
This one does, seems perfect to me:Would not be my choice.(I don't think it allows cc/cv)
Good job getting to the actual cause of the problem! To a solution...
Ok will try to open it. Any advice on the zone where I might start to hit with the screwdriver ?But with a yellow light and 4 pins? Perhaps it does have an extra charging monitoring system circuit..? Be interesting to see.
No I can´t, that would implicate surveillance on all charges, and it is to avoid that we are working on a more practical solution.But don't want you to break it as you can always just pull the plug when the yellow light comes on.
Besides the negative and the positive poles, what are the other 2 pins for?But with a yellow light and 4 pins
...and how to adjust.TommyCat wrote: ↑Jul 08 2019 12:02pmPlease take a closer look at this thread to see what a proper charge is all about.
https://electricbike.com/forum/forum/kn ... d-advanced
I do not see any trim pots from your picture. Your looking for adjustors like this...
Neither do I after carefully check...I do not see any trim pots from your picture. Your looking for adjustors like this
Yes it is, only 2, why do you say it's a good thing?What is good to see is that appears that the output of the charger is truly just two wires, with no special extra circuitry. You will have to see how they attach to your 4 pin connector. Just uses 2 pins? or are 2 doubled up... etc.