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Merge pull request #132 from dalathegreat/feature/teslaSOH

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Tesla: Add SOH% value and kWh safety check
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Daniel Öster 2024-01-16 23:27:46 +02:00 • committed by GitHub
commit d663b318f8
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1 changed files with 15 additions and 3 deletions
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18
Software/src/battery/TESLA-MODEL-3-BATTERY.cpp
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@ -40,7 +40,8 @@ static uint16_t expected_energy_remaining = 0;
static uint8_t full_charge_complete = 0; static uint8_t full_charge_complete = 0;
static uint16_t ideal_energy_remaining = 0; static uint16_t ideal_energy_remaining = 0;
static uint16_t nominal_energy_remaining = 0; static uint16_t nominal_energy_remaining = 0;
static uint16_t nominal_full_pack_energy = 0; static uint16_t nominal_full_pack_energy = 600;
static uint16_t bat_beginning_of_life = 600;
static uint16_t battery_charge_time_remaining = 0; // Minutes static uint16_t battery_charge_time_remaining = 0; // Minutes
static uint16_t regenerative_limit = 0; static uint16_t regenerative_limit = 0;
static uint16_t discharge_limit = 0; static uint16_t discharge_limit = 0;
@ -161,7 +162,11 @@ static const char* hvilStatusState[] = {"NOT OK",
void update_values_tesla_model_3_battery() { //This function maps all the values fetched via CAN to the correct parameters used for modbus void update_values_tesla_model_3_battery() { //This function maps all the values fetched via CAN to the correct parameters used for modbus
//After values are mapped, we perform some safety checks, and do some serial printouts //After values are mapped, we perform some safety checks, and do some serial printouts
StateOfHealth = 9900; //Hardcoded to 99%SOH //Calculate the SOH% to send to inverter
if (bat_beginning_of_life != 0) { //div/0 safeguard
StateOfHealth =
static_cast<uint16_t>((static_cast<double>(nominal_full_pack_energy) / bat_beginning_of_life) * 10000.0);
}
//Calculate the SOC% value to send to inverter //Calculate the SOC% value to send to inverter
soc_calculated = soc_vi; soc_calculated = soc_vi;
@ -181,7 +186,7 @@ void update_values_tesla_model_3_battery() { //This function maps all the value
capacity_Wh = BATTERY_WH_MAX; //Use the configured value to avoid overflows capacity_Wh = BATTERY_WH_MAX; //Use the configured value to avoid overflows
//Calculate the remaining Wh amount from SOC% and max Wh value. //Calculate the remaining Wh amount from SOC% and max Wh value.
remaining_capacity_Wh = remaining_capacity_Wh = static_cast<int>((static_cast<double>(SOC) / 10000) * BATTERY_WH_MAX); remaining_capacity_Wh = static_cast<uint16_t>((static_cast<double>(SOC) / 10000) * BATTERY_WH_MAX);
// Define the allowed discharge power // Define the allowed discharge power
max_target_discharge_power = (max_discharge_current * volts); max_target_discharge_power = (max_discharge_current * volts);
@ -252,6 +257,12 @@ void update_values_tesla_model_3_battery() { //This function maps all the value
} }
} }
//Check if BMS is in need of recalibration
if (nominal_full_pack_energy < 20) {
Serial.println("ERROR: kWh remaining reported by battery not plausible. Battery needs cycling or is broken!");
LEDcolor = YELLOW;
}
if (LFP_Chemistry) { //LFP limits used for voltage safeties if (LFP_Chemistry) { //LFP limits used for voltage safeties
if (cell_max_v >= MAX_CELL_VOLTAGE_LFP) { if (cell_max_v >= MAX_CELL_VOLTAGE_LFP) {
bms_status = FAULT; bms_status = FAULT;
@ -455,6 +466,7 @@ void receive_can_tesla_model_3_battery(CAN_frame_t rx_frame) {
break; break;
case 0x292: case 0x292:
stillAliveCAN = 12; //We are getting CAN messages from the BMS, set the CAN detect counter stillAliveCAN = 12; //We are getting CAN messages from the BMS, set the CAN detect counter
bat_beginning_of_life = (((rx_frame.data.u8[6] & 0x03) << 8) | rx_frame.data.u8[5]);
soc_min = (((rx_frame.data.u8[1] & 0x03) << 8) | rx_frame.data.u8[0]); soc_min = (((rx_frame.data.u8[1] & 0x03) << 8) | rx_frame.data.u8[0]);
soc_vi = (((rx_frame.data.u8[2] & 0x0F) << 6) | ((rx_frame.data.u8[1] & 0xFC) >> 2)); soc_vi = (((rx_frame.data.u8[2] & 0x0F) << 6) | ((rx_frame.data.u8[1] & 0xFC) >> 2));
soc_max = (((rx_frame.data.u8[3] & 0x3F) << 4) | ((rx_frame.data.u8[2] & 0xF0) >> 4)); soc_max = (((rx_frame.data.u8[3] & 0x3F) << 4) | ((rx_frame.data.u8[2] & 0xF0) >> 4));