How do BMS pre-charge circuits work I am having a friendly…
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How do BMS pre-charge circuits work
I am having a friendly disagreement with a fellow van lifer. They have some fancy batteries with a built in BMS, an on/off switch and a pre-charge circuit for their inverter. The system is wired up as battery positive terminal, fuse, shutoff switch, positive bus bar, fuse, inverter, negative bus bar, shunt, negative battery terminal. The bus bars also have solar charging.
I was trying to help them after sunset in a tree covered site. Our disagreement is that they believe that they can disconnect the batteries from the inverter with the shutoff switch and not the battery on/off switch and the precharge circuit will protect them when they switch the shutoff switch back on. They claim they have done this a bunch of times.
I claim that the solar has protected them in the past and that at night they need to turn the battery off and then on, with the shutoff switch in the on position. That said, I am not really confident about how BMS based pre-charge circuits really work. They humored me so I don't really know if I was right or wrong.
How do the pre-charge circuits work?
#lifestyle
I am having a friendly disagreement with a fellow van lifer. They have some fancy batteries with a built in BMS, an on/off switch and a pre-charge circuit for their inverter. The system is wired up as battery positive terminal, fuse, shutoff switch, positive bus bar, fuse, inverter, negative bus bar, shunt, negative battery terminal. The bus bars also have solar charging.
I was trying to help them after sunset in a tree covered site. Our disagreement is that they believe that they can disconnect the batteries from the inverter with the shutoff switch and not the battery on/off switch and the precharge circuit will protect them when they switch the shutoff switch back on. They claim they have done this a bunch of times.
I claim that the solar has protected them in the past and that at night they need to turn the battery off and then on, with the shutoff switch in the on position. That said, I am not really confident about how BMS based pre-charge circuits really work. They humored me so I don't really know if I was right or wrong.
How do the pre-charge circuits work?
#lifestyle
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