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Add safeguards to avoid div0

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Daniel 2024-06-08 19:28:24 +03:00
parent 2c434624c6
commit eda565f29b
4 changed files with 67 additions and 46 deletions
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15
Software/src/inverter/BYD-CAN.cpp
View file

@ -116,22 +116,27 @@ static bool initialDataSent = 0;
void update_values_can_inverter() { //This function maps all the values fetched from battery CAN to the correct CAN messages
//Calculate values
if (datalayer.battery.status.voltage_dV > 10) { // Only update value when we have voltage available to avoid div0
charge_current =
((datalayer.battery.status.max_charge_power_W * 10) /
datalayer.battery.status.voltage_dV); //Charge power in W , max volt in V+1decimal (P=UI, solve for I)
//The above calculation results in (30 000*10)/3700=81A
charge_current = (charge_current * 10); //Value needs a decimal before getting sent to inverter (81.0A)
if (charge_current > datalayer.battery.info.max_charge_amp_dA) {
charge_current =
datalayer.battery.info
.max_charge_amp_dA; //Cap the value to the max allowed Amp. Some inverters cannot handle large values.
}
discharge_current =
((datalayer.battery.status.max_discharge_power_W * 10) /
datalayer.battery.status.voltage_dV); //Charge power in W , max volt in V+1decimal (P=UI, solve for I)
//The above calculation results in (30 000*10)/3700=81A
discharge_current = (discharge_current * 10); //Value needs a decimal before getting sent to inverter (81.0A)
}
if (charge_current > datalayer.battery.info.max_charge_amp_dA) {
charge_current =
datalayer.battery.info
.max_charge_amp_dA; //Cap the value to the max allowed Amp. Some inverters cannot handle large values.
}
if (discharge_current > datalayer.battery.info.max_discharge_amp_dA) {
discharge_current =
datalayer.battery.info

16
Software/src/inverter/SMA-CAN.cpp
View file

@ -105,22 +105,24 @@ static uint16_t ampere_hours_remaining = 0;
void update_values_can_inverter() { //This function maps all the values fetched from battery CAN to the correct CAN messages
//Calculate values
if (datalayer.battery.status.voltage_dV > 10) { // Only update value when we have voltage available to avoid div0
discharge_current =
((datalayer.battery.status.max_discharge_power_W * 10) /
datalayer.battery.status.voltage_dV); //Charge power in W , max volt in V+1decimal (P=UI, solve for I)
discharge_current = (discharge_current * 10); //Value needs a decimal before getting sent to inverter (81.0A)
charge_current =
((datalayer.battery.status.max_charge_power_W * 10) /
datalayer.battery.status.voltage_dV); //Charge power in W , max volt in V+1decimal (P=UI, solve for I)
//The above calculation results in (30 000*10)/3700=81A
charge_current = (charge_current * 10); //Value needs a decimal before getting sent to inverter (81.0A)
}
if (charge_current > datalayer.battery.info.max_charge_amp_dA) {
charge_current =
datalayer.battery.info
.max_charge_amp_dA; //Cap the value to the max allowed Amp. Some inverters cannot handle large values.
}
discharge_current =
((datalayer.battery.status.max_discharge_power_W * 10) /
datalayer.battery.status.voltage_dV); //Charge power in W , max volt in V+1decimal (P=UI, solve for I)
//The above calculation results in (30 000*10)/3700=81A
discharge_current = (discharge_current * 10); //Value needs a decimal before getting sent to inverter (81.0A)
if (discharge_current > datalayer.battery.info.max_discharge_amp_dA) {
discharge_current =
datalayer.battery.info
@ -130,8 +132,10 @@ void update_values_can_inverter() { //This function maps all the values fetched
temperature_average =
((datalayer.battery.status.temperature_max_dC + datalayer.battery.status.temperature_min_dC) / 2);
if (datalayer.battery.status.voltage_dV > 10) { // Only update value when we have voltage available to avoid div0
ampere_hours_remaining = ((datalayer.battery.status.remaining_capacity_Wh / datalayer.battery.status.voltage_dV) *
100); //(WH[10000] * V+1[3600])*100 = 270 (27.0Ah)
}
//Map values to CAN messages
//Maxvoltage (eg 400.0V = 4000 , 16bits long)

14
Software/src/inverter/SMA-TRIPOWER-CAN.cpp
View file

@ -163,22 +163,24 @@ InvInitState invInitState = SYSTEM_FREQUENCY;
void update_values_can_inverter() { //This function maps all the values fetched from battery CAN to the inverter CAN
//Calculate values
if (datalayer.battery.status.voltage_dV > 10) { // Only update value when we have voltage available to avoid div0
charge_current =
((datalayer.battery.status.max_charge_power_W * 10) /
datalayer.battery.status.voltage_dV); //Charge power in W , max volt in V+1decimal (P=UI, solve for I)
//The above calculation results in (30 000*10)/3700=81A
charge_current = (charge_current * 10); //Value needs a decimal before getting sent to inverter (81.0A)
discharge_current =
((datalayer.battery.status.max_discharge_power_W * 10) /
datalayer.battery.status.voltage_dV); //Charge power in W , max volt in V+1decimal (P=UI, solve for I)
discharge_current = (discharge_current * 10); //Value needs a decimal before getting sent to inverter (81.0A)
}
if (charge_current > datalayer.battery.info.max_charge_amp_dA) {
charge_current =
datalayer.battery.info
.max_charge_amp_dA; //Cap the value to the max allowed Amp. Some inverters cannot handle large values.
}
discharge_current =
((datalayer.battery.status.max_discharge_power_W * 10) /
datalayer.battery.status.voltage_dV); //Charge power in W , max volt in V+1decimal (P=UI, solve for I)
//The above calculation results in (30 000*10)/3700=81A
discharge_current = (discharge_current * 10); //Value needs a decimal before getting sent to inverter (81.0A)
if (discharge_current > datalayer.battery.info.max_discharge_amp_dA) {
discharge_current =
datalayer.battery.info

34
Software/src/inverter/SOLAX-CAN.cpp
View file

@ -136,28 +136,38 @@ void update_values_can_inverter() { //This function maps all the values fetched
((datalayer.battery.status.temperature_max_dC + datalayer.battery.status.temperature_min_dC) / 2);
//datalayer.battery.status.max_charge_power_W (30000W max)
if (datalayer.battery.status.reported_soc > 9999) //99.99%
{ //Additional safety incase SOC% is 100, then do not charge battery further
if (datalayer.battery.status.reported_soc > 9999) { // 99.99%
// Additional safety incase SOC% is 100, then do not charge battery further
max_charge_rate_amp = 0;
} else { //We can pass on the battery charge rate (in W) to the inverter (that takes A)
} else { // We can pass on the battery charge rate (in W) to the inverter (that takes A)
if (datalayer.battery.status.max_charge_power_W >= 30000) {
max_charge_rate_amp = 75; //Incase battery can take over 30kW, cap value to 75A
} else { //Calculate the W value into A
max_charge_rate_amp = 75; // Incase battery can take over 30kW, cap value to 75A
} else { // Calculate the W value into A
if (datalayer.battery.status.voltage_dV > 10) {
max_charge_rate_amp =
(datalayer.battery.status.max_charge_power_W / (datalayer.battery.status.voltage_dV * 0.1)); // P/U = I
datalayer.battery.status.max_charge_power_W / (datalayer.battery.status.voltage_dV * 0.1); // P/U=I
} else { // We avoid dividing by 0 and crashing the board
// If we have no voltage, something has gone wrong, do not allow charging
max_charge_rate_amp = 0;
}
}
}
//datalayer.battery.status.max_discharge_power_W (30000W max)
if (datalayer.battery.status.reported_soc < 100) //1.00%
{ //Additional safety incase SOC% is below 1, then do not charge battery further
if (datalayer.battery.status.reported_soc < 100) { // 1.00%
// Additional safety in case SOC% is below 1, then do not discharge battery further
max_discharge_rate_amp = 0;
} else { //We can pass on the battery discharge rate to the inverter
} else { // We can pass on the battery discharge rate to the inverter
if (datalayer.battery.status.max_discharge_power_W >= 30000) {
max_discharge_rate_amp = 75; //Incase battery can be charged with over 30kW, cap value to 75A
} else { //Calculate the W value into A
max_discharge_rate_amp = 75; // Incase battery can be charged with over 30kW, cap value to 75A
} else { // Calculate the W value into A
if (datalayer.battery.status.voltage_dV > 10) {
max_discharge_rate_amp =
(datalayer.battery.status.max_discharge_power_W / (datalayer.battery.status.voltage_dV * 0.1)); // P/U = I
datalayer.battery.status.max_discharge_power_W / (datalayer.battery.status.voltage_dV * 0.1); // P/U=I
} else { // We avoid dividing by 0 and crashing the board
// If we have no voltage, something has gone wrong, do not allow discharging
max_discharge_rate_amp = 0;
}
}
}