Burgerman wrote:
And the charge part of a BMS is dismal because its in the wrong place. In order to stop a high cell going over the max allowed voltage it applied a tiny brake current. Which is a fraction of the chargers power. And it cannot decrease charger power. So 1 second later the voltage is at above max allowed and then it disconnects the charger. Once the voltage has been pulled down too low to say 3.5V then it re applies full power. Rinse and repeat. Also no way to control termination current or to know it its actually balanced or if theres some cell connection or fault. Meaning it can get more unbalanced over time and you get to stop at 50% discharge or whatever to save the battery a long way from home unexpectedly.
So yes you can. But no you shouldnt! Its the wrong thing, doing stuff we dont need or want, and a thing thats terrible at charging. Because its in the wrong place.
With a 200Ah wheelchair pack you need 30 to 40A minimum or you would be there all week.
Ah but you are only taking120Ah out of them in a week! Because its winter? Anyway 25A isnt bad. Its already 3x faster than a 8A mobility charger! And almost the 30 to 40A I said above.
Burgerman wrote:You bypassed the BMS so it doesent screw you up?
Use it only for dumb charging at a lower voltage supply?
I hope it works ok. Get yourself a smoke alarm!
Burgerman wrote: And the balancing/charging stuff is way inferior to the PL8. Other than right now they are in short supply!
expresso wrote:when they start shipping - everyone needs to buy - 2 or 3 - to be safe for later on - it it happens again or if they even stop making it
Burgerman wrote:In what way? Appears to be exactly the same as all the rest.
Its still got no purpose on a powerchair that I can see that you would actually want, other than as a cell log. And those are cheap anyway.
Can you think of any reason to want one? Maybe temporarily for charging till PL8s are available or we evaluate a different cell balancing charger or three.
Now if you connected the cells directly to the power module so that non of its unwanted protection stuff interferred with use, and just used it as a cell log, great! But if the pack is big enough, you dont really need that anyway as you are out of day before you are out of battery. And the balancing/charging stuff is way inferior to the PL8. Other than right now they are in short supply!
shirley_hkg wrote:
It has the new split type version , so you can mount the display /control panel with flexibility.
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