ISDT Q6 Plus 300 watt charger, 25 volt 350 watt PSU, all housed in a high impact case for simplicity and postability.
Of course there are many options still, with more powerful setups available in the charging and power supply line. But from what I have read and been told so far, you are far from needing anything more than a 14 amps charge rate.
The iCharger X6 at £100 for the charger is not only very capable, small, light and thus easy to carry around, but good value to.
Burgerman wrote:ISDT Q6 Plus 300 watt charger, 25 volt 350 watt PSU, all housed in a high impact case for simplicity and postability.
Of course there are many options still, with more powerful setups available in the charging and power supply line. But from what I have read and been told so far, you are far from needing anything more than a 14 amps charge rate.
The iCharger X6 at £100 for the charger is not only very capable, small, light and thus easy to carry around, but good value to.
Those are all tiny unsophysticated 6S chargers. They wont do what we need. By a long way.
The only charger that can PROPERLY be configured to charge large 24V LiFeP04 packs, and lead packs is the PL8v2 and only then because I got them to change many parameters in the charge algo and allowable settings over a full year and because I have deeper access to the user settings than officially allowed!
Those other chargers wont do what we need at all for many reasons. And we really need proper PC connectivity and graphing to problem solve and control at times as well. Also, most of us regularly charge at 28.80V and 40A. Inc myself. So we need at least 1152 watts output plus 15% for losses is about 1325 watts input. So a 1500W 24V power supply that is truly stable under a high frequency pulswidth load is what is needed by most. Slow charging with smaller supplies when travelling may be a different matter.
By way of example, many here are charging 8S X 130Ah to 240Ah lithium packs rated at up to 5C charge! So a 14A charge would take forever. Not to mention we need complex charge termination configuration where we can control termination currentt, balance details and start point, CV time limits and cell balance spread etc etc. Those chargers you show, and even the expensive ichargers are frankly hopless in comparison.
Heres my usual charge setup that is run at max power with 2x 1200 watt power supplies at once and at 40A to charge a 13S (6S and 7S) split pack
http://www.wheelchairdriver.com/BM3-con ... on/PL8.jpg Normal 13S setup with 2x 1200 watt isolated supplies.
Typical battery: This is 120Ah 8S and 5C charge compatible. So 40A just tickles it! Still takes 3 hours and a half... http://www.wheelchairdriver.com/images- ... hair-7.jpg
Oh yeah, the ISDT chargers are very basic in their features with just charge, discharge and storage modes. For what they are they work well, no comparison to the PL8, but then they shouldn't be at a fraction the price. The iChargers are different and show in their price difference, as they rival the PL's.
I'm curious with the large 24V LiFeP04 packs though, as you can't charge and balance them as a complete pack on the PL8 V2, as it can only monitor 8 cells at a time.
So I am guessing you're either using a seperate BMS and just feeding power into the pack to charge, which then negates the use of the PL8 V2 really I suppose, or breaking the multi cell packs down into banks of 8 cells to be charged in parallel? The latter being the logical conclusion to me.
There aren't many 8 cell capable chargers, the 4010 DUO can do up to 10s and the cheaper 3010b also, so that limits your choices and if you are using the PL8 then this helps with you being able to advise others from vast years of experience.
Lesser chargers would need the banks splitting into 4x 6s packs to parallel charge at one time, which would then open the door to other chargers as they all have the ability to charge lithium polymer and ion cell chemistrys. But this adds more cost in the pack wiring.
PC connectivity is handy, but after initial setup of the charging memory allocation to suit your pack type/wiring configuration, what extra is needed after this point?
Surely the one good indication of pack quality is the IR (internal resistance) of the individual cells to determine the state of the pack as a whole and to help identify single cells on the way out. Which you can gleen from the stock PL8 V2 LCD anyway, so can do away with the laptop until changes are needed.
The user interface of the PL's isn't great sadly, hence their Bump Controller which adds another dimension and might also be handy going by what you have said above with the wireless monitoring and charger setup available through that. This is accessible from an Android or IOS device also which is neat, so a PL8 with Bump could be a good option for some.
.That last photo is a monster pack, so yeah I have no doubt 40 amps would only tickle it. But then again, ideally you wouldn't want to charge at 5C at all times as that will degrade the pack quicker over time and I am guessing this setup isn't cheap
In any case I'm not trying to argue with you at all, but merely learning what is used and at the same time give another perspective as we're still just charging batteries, just in differing applications.
Burgerman wrote:Its essential to me. It allows you to see problems or bad cells, or high self discharge on one group etc developing. And its simply easier than pressing buttons! I fine tune the settings such as termination current, or CV timeout as the pack ages by looking at the curves and data. Remember that I have a higher level of access to the charge presets than normal users too.
Evening.
I did forget you use Li-Ion over polymer, so the nominal volate of each cell is lower.
As with foghornleghorn above, your comments on the charger parameters did lead me to belive you had some back door access within the Revolectrix software opened up, which would then not be available to the average buyer. But your last post says this isn't the case and it is just the parameters you input using the PC interface for simplicity that tunes the PL8's charging preset to suit the packs you are using.
Thus once set do not need touching.
The PC interface provides you with a graphical view of the cells behaviour during the charge cycle, which again unless you were building packs to sell I don't see the end user messing around with that very much. i'd imagine they would just want a plug and play setup that is safe and reliable, with the simple tell tale feedback to give an indication on the packs state of health.
The LCD interface has never been one of my favourites, it works but is clunky.
I'm surprised not to see you offering PL8's with the presets already flashed to them for ease, would make a nice out of the box working package.
Here is a photo of one of my 2400 watt, 12/24 volt units. Bit smaller than the lab PSU's.
Burgerman wrote:Dont trust me, those details are MK's own, from their own tech sheets. Not mine.
Yet they write this sort of thing on the battery. Because they CAN be charged at 29.6!!
Its safe, its just that it ruins them!
Better for sales. download/file.php?id=9482&mode=view
Burgerman wrote:Again MK shows this clearly here: http://www.mkbattery.com/pdf/mktechm.pdf
jefferso wrote:Is there anything on the FUIM3 which indicates which side is up to plug it in to the PL8? I guess I got lucky because it worked when plugged in, or does it matter if it's upside down? Seems like it would physically fit either way.
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