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Add freezing temperature overwriting

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Daniel 2023-11-26 22:18:59 +02:00
parent aba846d136
commit 3d79b094f2
2 changed files with 19 additions and 0 deletions
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18
Software/src/inverter/BYD-MODBUS.cpp
View file

@ -2,6 +2,7 @@
void update_modbus_registers_byd() {
//Updata for ModbusRTU Server for BYD
verify_temperature_modbus();
handle_update_data_modbusp201_byd();
handle_update_data_modbusp301_byd();
}
@ -106,3 +107,20 @@ void handle_update_data_modbusp301_byd() {
static uint16_t i = 300;
memcpy(&mbPV[i], battery_data, sizeof(battery_data));
}
void verify_temperature_modbus() {
// This section checks if the battery temperature is negative, and incase it falls between -9.0 and -20.0C degrees
// The Fronius Gen24 (and other Fronius inverters also affected), will stop charge/discharge if the battery gets colder than -10°C.
// This is due to the original battery pack (BYD HVM), is a lithium iron phosphate battery, that cannot be charged in cold weather.
// When using EV packs with NCM/LMO/NCA chemsitry, this is not a problem, since these chemistries are OK for outdoor cold use.
if (temperature_min > 32768) { // Signed value on negative side
if (temperature_min < 65445 && temperature_min > 65335) { // Between -9.0 and -20.0C degrees
temperature_min = 65445; //Cap value to -9.0C
}
}
if (temperature_max > 32768) { // Signed value on negative side
if (temperature_max < 65445 && temperature_max > 65335) { // Between -9.0 and -20.0C degrees
temperature_max = 65445; //Cap value to -9.0C
}
}
}

1
Software/src/inverter/BYD-MODBUS.h
View file

@ -31,6 +31,7 @@ extern uint16_t max_voltage;
extern uint16_t min_voltage;
void handle_static_data_modbus_byd();
void verify_temperature_modbus();
void handle_update_data_modbusp201_byd();
void handle_update_data_modbusp301_byd();
void update_modbus_registers_byd();