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Sleeper85 / esphome-jk-bms-can

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RCV, RFV, RCV Time and RFV Time question #68

Closed txubelaxu closed 1 week ago

txubelaxu commented 4 weeks ago

Hi everybody,

I am little confused about how RCV, RFV, RCV Time and RFV Time parameter CELL values are managed by esphome-jk-bms-can:

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Does yambms respect (RCV cell number) & (RFV cell_number)? After reaching the voltage of (RCV cell number), does it get to maintain that voltage for "RCV Time"? After reaching RCV Time, does it ask to the inverter for changing to (RFV cell_number)? After reaching the voltage of (RFV * cell_number), does it get to maintain that voltage for "RFV Time"?

I have seen that, for example, yambms RFV is changeable from the frontend.

Many thanks to everyone for your great work!!!

Sleeper85 commented 4 weeks ago

YamBMS was created to work with several different brands of BMS that do not have RCV, RFV, RCV Time and RFV Time parameters like in JK-PB BMS.

So YamBMS uses its own charging logic which is much more advanced than what JK-PB BMS does.

Regarding the charging values ​​which are non-existent in JK-B BMS, YamBMS uses its own values ​​modifiable in HA but also uses certain values ​​coming from the BMS configuration see this Excel table.

I still have a lot of work to do to document all the functions.

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shvmm commented 3 weeks ago

Hi everybody,

I am little confused about how RCV, RFV, RCV Time and RFV Time parameter CELL values are managed by esphome-jk-bms-can:

Highly likely these feature requests were made to the JK-BMS team by people unaware that cutoff charging logic exists and can be easily implemented. People don't use a 16S inverter BMS to charge Lead Acid batteries. Vice-versa, fitting Lead Acid Charging behaviour to work for Lithium Cells is waste of time in the age of BMS communication.

I would much rather want JK_BMS team give us firmware update to turn balancing ON/OFF using UART on all their BMS.