SiO2 Batteries and High Amp Draws

BFL13 wrote:

StirCrazy wrote:

pianotuna wrote:
Every extra connection causes some additional resistance and a possible failure point.

that is true, but when talking one battery or 4 that isnt much of a difference, the only extra contection is the jumpers bettwen the batteris themselves. heavy wires and good bolts... not much of a risk.

Would having fewer BMSs that need to work together be an advantage, or even from having fewer BMSs as possible failure points-- that was mentioned with some lower priced LFPs---saw that somewhere. Might have got it wrong.

there is a lot of misconseption out there that BMS control the power of a battery, they don't they are normaly in apassive state just monitoring the power coming in and out of the battery then if it hits a limit they do something. or when the battery is full they ballance the cells if that is a feature of your BMS. if your operating in there range then no as they would just be pasive at that point not controling anything but monitering. it is not the normal way for a BMS to fail. when you are operating around the limits of their capability, that is when they would fail so if you plan on having a 110amp draw, I would much rather have two 100 watt batteries with 100amp bms than one 200 watt battery with a 150 watt BMS, or better yet four 100amp batteries all sporting 100amp BMS.

of course there are always exceptions and maybe a cheep BMS would have a higher degree of componant failure and so on, but a lot of cheep ones are just unbranded copys of the good ones using the same exact parts. I think the biggest failure rate I saw was when they started intagrating bluetooth monitoring into the BMS.

Steve