?Yes and there are plenty of people doing it so wrong. Above is one good example of it. Just because something works for one person one time doesnt make it good practice nor safe.
Above is a VERY good example of someone that doesnt know what a BMS is for and what the balancing function is for. Its 2 different things and please read back to the 3 points i listed where balancing is the last function. BMS is so much more and its a protective unit. It protects for WHEN shit hits the fan...
Lithium batteries without BMS is not the proper way of doing it. And it does not get justified because others do it! Running without balancing is something else and yes that can be done but since most BMS systems include balancer its not really worth it.
Daromer, I appear to have set off a firestorm, unintended I assure you.
For myself am trying to learn, am currently using a 5s pac to run my tractor no controller, no BMS, while I wait for the BMS to arrive so that I can build a 5s 2p or 3p pack. My 5s pack may be damaged by having no BMS, but I have the modules and can afford to lose 5 if they become damaged, I do find it interesting that there are people who claim a BMS is not needed, for myself I decided that I will use BMS's for my packs.
My questions are on the level of, if the BMS sees volts higher than it is set for, it shuts down the charging, how does it do that? It would seem that it must either put the voltage input line (panel charger etc) into an open circuit, or a dead short, if a short it will have to have a pretty fancy arrangement of diodes to stop any damage to either the battery or the charging system.
So in the absence of a charge controller what happens when the battery is not fully charged, if the charger tries to deliver a voltage that is too high for the battery at an amperage that is too high for the battery What does the BMS do?.
In my old LA wind turbine days, with no controller or BMS the battery simply accepted the current and boiled off the water.
My mention of the cost ratio's between batteries, PV panels and controllers is nothing more than a simple observation/opinion, not one I would present for argument./ More of an 'it seems to me' statement. Though charted on a graph might agree with my observation.
Please regard my questions as those of perhaps a 5 year old wanting to know
"daddy whats a square, and can I have that big elephant over there".
Tony.