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change from packvoltage to cell estimated SOC

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Daniel Öster 2025-07-18 00:17:45 +03:00
parent 68889a4f35
commit 59d4dd4a8a
1 changed files with 30 additions and 16 deletions
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46
Software/src/battery/BOLT-AMPERA-BATTERY.cpp
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@ -35,26 +35,42 @@ TODOs left for this implementation
0x460 Energy Storage System Temp HV (Who sends this? Battery?)
*/
// Define the data points for %SOC depending on pack voltage
const uint8_t numEntries = 28;
const uint16_t SOC[28] = {10000, 9985, 9970, 9730, 9490, 8980, 8470, 8110, 7750, 7270, 6790, 6145, 5500, 5200,
4900, 4405, 3910, 3455, 3000, 2640, 2280, 1940, 1600, 1040, 480, 240, 120, 0};
// Define the data points for %SOC depending on cell voltage
// NCM Discharge Curve Lookup Table (100 points, 4.2V-3.0V)
// SOC[100] = State of Charge (0.01% units, e.g., 10000 = 100.00%)
// voltage_lookup[100] = Pack voltage (mV)
const uint8_t numEntries = 100;
const uint16_t SOC[100] = {
10000, 9985, 9970, 9955, 9940, 9925, 9910, 9895, 9880, 9865, // 4.20V - 4.15V (High plateau)
9850, 9820, 9790, 9760, 9730, 9700, 9660, 9620, 9580, 9540, // 4.14V - 4.00V
9500, 9450, 9400, 9350, 9300, 9250, 9200, 9150, 9100, 9050, // 3.99V - 3.90V
9000, 8900, 8800, 8700, 8600, 8500, 8400, 8300, 8200, 8100, // 3.89V - 3.80V
8000, 7850, 7700, 7550, 7400, 7250, 7100, 6950, 6800, 6650, // 3.79V - 3.70V
6500, 6300, 6100, 5900, 5700, 5500, 5300, 5100, 4900, 4700, // 3.69V - 3.60V
4500, 4300, 4100, 3900, 3700, 3500, 3300, 3100, 2900, 2700, // 3.59V - 3.50V
2500, 2250, 2000, 1750, 1500, 1250, 1000, 800, 600, 400, // 3.49V - 3.40V (Steep drop)
300, 200, 150, 100, 80, 60, 40, 30, 20, 10, // 3.39V - 3.30V
5, 2, 1, 0, 0, 0, 0, 0, 0, 0 // <3.30V (Cutoff)
};
const uint16_t voltage_lookup[28] = { //403 V fully charged, 335V empty
4032, 4005, 3978, 3951, 3924, 3897, 3870, 3843, 3816, 3789, 3762, 3735, 3708, 3681,
3654, 3627, 3600, 3573, 3546, 3519, 3492, 3465, 3438, 3411, 3384, 3357, 3350, 3350};
static uint16_t estimateSOC(uint16_t packVoltage) { // Linear interpolation function
if (packVoltage >= voltage_lookup[0]) {
const uint16_t voltage_lookup[100] = {
4200, 4195, 4190, 4185, 4180, 4175, 4170, 4165, 4160, 4155, // High plateau
4150, 4140, 4130, 4120, 4110, 4100, 4090, 4080, 4070, 4060, 4050, 4040, 4030, 4020, 4010, 4000, 3990, 3980,
3970, 3960, 3950, 3940, 3930, 3920, 3910, 3900, 3890, 3880, 3870, 3860, 3850, 3840, 3830, 3820, 3810, 3800,
3790, 3780, 3770, 3760, 3750, 3740, 3730, 3720, 3710, 3700, 3690, 3680, 3670, 3660, 3650, 3640, 3630, 3620,
3610, 3600, 3590, 3580, 3570, 3560, 3550, 3540, 3530, 3520, 3510, 3500, 3490, 3480, 3470, 3460, 3450, 3440,
3430, 3420, 3410, 3400, 3390, 3380, 3370, 3360, 3350, 3340, 3330, 3320, 3310, 3300, 3290, 3280, 3270, 3260};
static uint16_t estimateSOC(uint16_t cellVoltage) { // Linear interpolation function
if (cellVoltage >= voltage_lookup[0]) {
return SOC[0];
}
if (packVoltage <= voltage_lookup[numEntries - 1]) {
if (cellVoltage <= voltage_lookup[numEntries - 1]) {
return SOC[numEntries - 1];
}
for (int i = 1; i < numEntries; ++i) {
if (packVoltage >= voltage_lookup[i]) {
double t = (packVoltage - voltage_lookup[i]) / (voltage_lookup[i - 1] - voltage_lookup[i]);
if (cellVoltage >= voltage_lookup[i]) {
double t = (cellVoltage - voltage_lookup[i]) / (voltage_lookup[i - 1] - voltage_lookup[i]);
return SOC[i] + t * (SOC[i - 1] - SOC[i]);
}
}
@ -63,9 +79,7 @@ static uint16_t estimateSOC(uint16_t packVoltage) { // Linear interpolation fun
void BoltAmperaBattery::update_values() { //This function maps all the values fetched via CAN to the battery datalayer
//datalayer.battery.status.real_soc = battery_SOC_display; //TODO: this 7E4 poll does not work
datalayer.battery.status.real_soc = estimateSOC(battery_voltage_periodic_dV); //TODO, this is bad and barely works
datalayer.battery.status.real_soc = estimateSOC(battery_cell_voltage_max_mV); //TODO, this is bad and barely works
datalayer.battery.status.voltage_dV = battery_voltage_periodic_dV;