Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
- Messages
- 22,902
Appears charge current control is requested by REC BMS, performed by inverter/charger
Page 15:
"MAXC? or MAXC x.xxx Maximum charge current Returns float current [A] 10.0 to 1000.0 A"
"MAXD? or MAXD x.xxx Maximum discharge current Returns float current [A] 10.0 to 1000.0 A"
Page 18:
"Table 13: CAN message structure description for ID=0x037, dlc=8."
"3 Max charge current high byte Unsigned integer 0-65535, LSB = 0.1 A"
Page 22:
"Battery Pack’s Charging Algorithm: The communication between the REC BMS and the system is established through the CAN bus. All the parameters that control the charging/discharging behavior are calculated by the BMS and transmitted to the system in every measurement cycle. The charging current is controlled by the Maximum charging current parameter. It is calculated as Charge coefficient CHAC x Battery capacity CAPA. The parameter has an upper limit which is defined as Maximum charging current per device MAXC x Charger coefficient CHCU. When the highest cell reaches the Balance start voltage setting, the charging current starts to ramp down to 1.1 A until the last cell rises to the End of charge voltage. At that point the Maximum charging voltage allowed is set to Number of cells x (End of charge voltage per cell – 0.5 x End of charge hysteresis per cell). End of charge SOC hysteresis and End of charge cell voltage hysteresis is set to prevent unwanted switching. SOC is calibrated to 100 % and power LED light is on. Charge optocoupler is turned off."
Page 15:
"MAXC? or MAXC x.xxx Maximum charge current Returns float current [A] 10.0 to 1000.0 A"
"MAXD? or MAXD x.xxx Maximum discharge current Returns float current [A] 10.0 to 1000.0 A"
Page 18:
"Table 13: CAN message structure description for ID=0x037, dlc=8."
"3 Max charge current high byte Unsigned integer 0-65535, LSB = 0.1 A"
Page 22:
"Battery Pack’s Charging Algorithm: The communication between the REC BMS and the system is established through the CAN bus. All the parameters that control the charging/discharging behavior are calculated by the BMS and transmitted to the system in every measurement cycle. The charging current is controlled by the Maximum charging current parameter. It is calculated as Charge coefficient CHAC x Battery capacity CAPA. The parameter has an upper limit which is defined as Maximum charging current per device MAXC x Charger coefficient CHCU. When the highest cell reaches the Balance start voltage setting, the charging current starts to ramp down to 1.1 A until the last cell rises to the End of charge voltage. At that point the Maximum charging voltage allowed is set to Number of cells x (End of charge voltage per cell – 0.5 x End of charge hysteresis per cell). End of charge SOC hysteresis and End of charge cell voltage hysteresis is set to prevent unwanted switching. SOC is calibrated to 100 % and power LED light is on. Charge optocoupler is turned off."