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add P45B cell characteristics #168

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merged 3 commits into from
Feb 9, 2025
Merged

add P45B cell characteristics #168

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4c3a137
add P45B cell characteristics
Sabramz Feb 2, 2025
881f0d9
Merge branch 'develop' into p45b-parameters
Sabramz Feb 2, 2025
7a697cc
Merge branch 'develop' into p45b-parameters
Sabramz Feb 9, 2025
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35 changes: 20 additions & 15 deletions Core/Inc/bmsConfig.h
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Original file line number Diff line number Diff line change
Expand Up @@ -16,27 +16,32 @@
#define NUM_THERMS_PER_CHIP 14

// Firmware limits
#define MAX_TEMP 65 //degrees C
#define MIN_TEMP -25 // deg C
#define MAX_VOLT_MEAS 65535
#define MIN_VOLT_MEAS 0
#define MAX_TEMP 60 /* Celsius */
#define MIN_TEMP -40 /* Celsius */
#define MAX_CELL_TEMP_BAL 45 /* Celsius */
#define MAX_DELTA_V 0.015
#define BAL_MIN_V 4.00

// Boosting Parameters
#define BOOST_TIME 5 // seconds
#define BOOST_RECHARGE_TIME 30 // seconds
#define CONTDCL_MULTIPLIER 3

//cell limits
#define MIN_VOLT 2.5
#define MAX_VOLT 4.2
#define MAX_CHARGE_VOLT 4.21
#define MAX_DELTA_V 0.015
#define BAL_MIN_V 4.00
#define MAX_CELL_TEMP 55
#define MIN_CELL_TEMP 15
#define MAX_CELL_CURR 500 // Amps per BMS cell
#define MAX_CELL_TEMP_BAL 45
#define MAX_CHG_CELL_CURR 20
/* Molicel P45B Cell Specifications */
#define TYP_CAPICITY_AH 4.5 /* Amp-hours */
#define TYP_CAPACITY_WH 16.2 /* Watt-hours */
#define MIN_CAPICITY_AH 4.3 /* Amp-hours */
#define MIN_CAPACITY_WH 15.5 /* Watt-hours */
#define MIN_VOLT 2.5
#define NOM_VOLT 3.6
#define MAX_VOLT 4.2
#define MAX_CHARGE_VOLT 4.205
#define MAX_CHG_CURR 13.5 /* Amps */
#define MAX_DISCHG_CURR 45 /* Amps */
#define MIN_CHG_TEMP 0 /* Celsius */
#define MIN_DISCHG_TEMP -40 /* Celsius */
#define MAX_CELL_TEMP 60 /* Celsius */
#define TYP_IMPDNCE 0.015 /* Ohms, DC, 50% SoC */

// Algorithm settings
#define CHARGE_SETL_TIMEOUT 60000 // 1 minute, may need adjustment
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14 changes: 7 additions & 7 deletions Core/Src/analyzer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -432,13 +432,13 @@ void calc_dcl(acc_data_t *bmsdata)
}

/* ceiling for current limit */
if (current_limit > MAX_CELL_CURR) {
bmsdata->discharge_limit = MAX_CELL_CURR;
if (current_limit > MAX_DISCHG_CURR) {
bmsdata->discharge_limit = MAX_DISCHG_CURR;
return;
}

/* protection against being init to a high value */
if (bmsdata->discharge_limit > MAX_CELL_CURR) {
if (bmsdata->discharge_limit > MAX_DISCHG_CURR) {
bmsdata->discharge_limit = 0;
prev_dcl = 0;
}
Expand Down Expand Up @@ -517,8 +517,8 @@ void calcCCL(acc_data_t *bmsdata)
}

/* ceiling for current limit */
if (currentLimit > MAX_CHG_CELL_CURR) {
bmsdata->charge_limit = MAX_CHG_CELL_CURR;
if (currentLimit > MAX_CHG_CURR) {
bmsdata->charge_limit = MAX_CHG_CURR;
} else {
bmsdata->charge_limit = currentLimit;
}
Expand All @@ -541,8 +541,8 @@ void calc_cont_ccl(acc_data_t *bmsdata)
bmsdata->cont_CCL = TEMP_TO_CCL[max_res_index];
}

if (bmsdata->cont_CCL > MAX_CHG_CELL_CURR) {
bmsdata->cont_CCL = MAX_CHG_CELL_CURR;
if (bmsdata->cont_CCL > MAX_CHG_CURR) {
bmsdata->cont_CCL = MAX_CHG_CURR;
}
}

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