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Only set precharge bit when almost done precharging.

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To prevent battery errors due to precharge taking too long, we now only set the precharge bit when voltages internal and external voltages are already close.
This commit is contained in:
mvgalen 2025-04-15 21:07:57 +02:00
parent 4b8bf6afec
commit 3bd5287d02
3 changed files with 12 additions and 9 deletions
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12
Software/src/battery/MEB-BATTERY.cpp
View file

@ -1725,8 +1725,8 @@ void transmit_can_battery() {
logging.printf("MEB: Requesting HV\n");
}
if ((MEB_503.data.u8[1] & 0x80) !=
(datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING ? 0x80 : 0x00)) {
if (datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING) {
(datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING_FINAL ? 0x80 : 0x00)) {
if (datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING_FINAL) {
logging.printf("MEB: Precharge bit set to active\n");
} else {
logging.printf("MEB: Precharge bit set to inactive\n");
@ -1734,7 +1734,7 @@ void transmit_can_battery() {
}
#endif
MEB_503.data.u8[1] =
0x30 | (datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING ? 0x80 : 0x00);
0x30 | (datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING_FINAL ? 0x80 : 0x00);
MEB_503.data.u8[3] = BMS_TARGET_AC_CHARGING;
MEB_503.data.u8[5] = 0x82; // Bordnetz Active
MEB_503.data.u8[6] = 0xE0; // Request emergency shutdown HV system == 0, false
@ -1751,8 +1751,8 @@ void transmit_can_battery() {
logging.printf("MEB: Requesting HV_OFF\n");
}
if ((MEB_503.data.u8[1] & 0x80) !=
(datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING ? 0x80 : 0x00)) {
if (datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING) {
(datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING_FINAL ? 0x80 : 0x00)) {
if (datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING_FINAL) {
logging.printf("MEB: Precharge bit set to active\n");
} else {
logging.printf("MEB: Precharge bit set to inactive\n");
@ -1760,7 +1760,7 @@ void transmit_can_battery() {
}
#endif
MEB_503.data.u8[1] =
0x10 | (datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING ? 0x80 : 0x00);
0x10 | (datalayer.system.status.precharge_status == AUTO_PRECHARGE_PRECHARGING_FINAL ? 0x80 : 0x00);
MEB_503.data.u8[3] = BMS_TARGET_HV_OFF;
MEB_503.data.u8[5] = 0x80; // Bordnetz Inactive
MEB_503.data.u8[6] =

8
Software/src/communication/precharge_control/precharge_control.cpp
View file

@ -77,15 +77,17 @@ void handle_precharge_control() {
break;
case AUTO_PRECHARGE_PRECHARGING:
case AUTO_PRECHARGE_PRECHARGING_FINAL:
// Check if external voltage measurement changed, for instance with the MEB batteries, the external voltage is only updated every 100ms.
if (prev_external_voltage != external_voltage && external_voltage != 0) {
prev_external_voltage = external_voltage;
if (labs(target_voltage - external_voltage) > 150) {
/*if (labs(target_voltage - external_voltage) > 150) {
delta_freq = 2000;
} else if (labs(target_voltage - external_voltage) > 80) {
} else*/ if (labs(target_voltage - external_voltage) > 80) {
delta_freq = labs(target_voltage - external_voltage) * 6;
} else {
datalayer.system.status.precharge_status = AUTO_PRECHARGE_PRECHARGING_FINAL;
delta_freq = labs(target_voltage - external_voltage) * 3;
}
if (target_voltage > external_voltage) {
@ -98,7 +100,7 @@ void handle_precharge_control() {
if (freq < Precharge_min_PWM_Freq)
freq = Precharge_min_PWM_Freq;
#ifdef DEBUG_LOG
logging.printf("Precharge: Target: %d V Extern: %d V Frequency: %u\n", target_voltage / 10,
logging.printf("Precharge: Target: %d V Extern: %d V New frequency: %u Hz\n", target_voltage / 10,
external_voltage / 10, freq);
#endif
ledcWriteTone(PRECHARGE_PIN, freq);

1
Software/src/devboard/utils/types.h
View file

@ -12,6 +12,7 @@ enum PrechargeState {
AUTO_PRECHARGE_IDLE,
AUTO_PRECHARGE_START,
AUTO_PRECHARGE_PRECHARGING,
AUTO_PRECHARGE_PRECHARGING_FINAL,
AUTO_PRECHARGE_OFF,
AUTO_PRECHARGE_COMPLETED
};