generate ocv lut

Apps/Inc/VoltageToSoC.h

@@ -0,0 +1,360 @@
+/**
+ * Look up table for determining state of charge from OCV
+ * OCV-SOC data pulled from a C/20 discharge curve for LG21700M50T cells.
+ * 
+ * For more details and the LUT generation script, see `Tools/ocv-soc.ipynb`
+ */
+
+#ifndef VOLTAGE_TO_SOC_H
+#define VOLTAGE_TO_SOC_H
+
+#include <stdint.h>
+
+#define OCV_SOC_LUT_SIZE      338
+#define OCV_SOC_LUT_STRIDE    5
+#define OCV_SOC_LUT_MIN_MV    2500
+#define OCV_SOC_LUT_MAX_MV    4185
+#define OCV_SOC_TOTAL_CAP_uAh 4657289
+
+const uint32_t lg21700m50t_ocv_soc_lut_uAh[OCV_SOC_LUT_SIZE] = {
+    0,
+    1021,
+    2069,
+    3123,
+    4180,
+    5243,
+    6310,
+    7380,
+    8458,
+    9540,
+    10626,
+    11722,
+    12818,
+    13921,
+    15030,
+    16147,
+    17266,
+    18396,
+    19528,
+    20674,
+    21817,
+    22974,
+    24135,
+    25308,
+    26486,
+    27672,
+    28868,
+    30076,
+    31287,
+    32509,
+    33742,
+    34988,
+    36239,
+    37502,
+    38781,
+    40068,
+    41368,
+    42682,
+    44009,
+    45345,
+    46701,
+    48071,
+    49456,
+    50859,
+    52274,
+    53706,
+    55159,
+    56625,
+    58119,
+    59630,
+    61160,
+    62716,
+    64285,
+    65880,
+    67500,
+    69146,
+    70816,
+    72510,
+    74238,
+    75988,
+    77781,
+    79598,
+    81447,
+    83340,
+    85272,
+    87241,
+    89252,
+    91309,
+    93416,
+    95573,
+    97779,
+    100039,
+    102356,
+    104728,
+    107169,
+    109656,
+    112202,
+    114821,
+    117505,
+    120245,
+    123053,
+    125933,
+    128869,
+    131883,
+    134952,
+    138091,
+    141314,
+    144594,
+    147940,
+    151365,
+    154863,
+    158438,
+    162096,
+    165816,
+    169636,
+    173533,
+    177515,
+    181570,
+    185726,
+    189965,
+    194297,
+    198720,
+    203259,
+    207880,
+    212617,
+    217470,
+    222434,
+    227506,
+    232698,
+    238016,
+    243478,
+    249041,
+    254732,
+    260579,
+    266544,
+    272658,
+    278888,
+    285256,
+    291742,
+    298356,
+    305075,
+    311904,
+    318829,
+    325832,
+    332927,
+    340118,
+    347368,
+    354654,
+    362007,
+    369389,
+    376813,
+    384271,
+    391749,
+    399283,
+    406860,
+    414456,
+    422120,
+    429839,
+    437590,
+    445421,
+    453296,
+    461254,
+    469277,
+    477376,
+    485540,
+    493795,
+    502123,
+    510535,
+    519033,
+    527597,
+    536285,
+    545076,
+    553964,
+    562963,
+    572104,
+    581382,
+    590785,
+    600289,
+    609932,
+    619760,
+    629747,
+    639923,
+    650266,
+    660734,
+    671312,
+    681988,
+    692736,
+    703498,
+    714236,
+    724996,
+    735766,
+    746352,
+    756789,
+    766922,
+    776607,
+    785855,
+    794749,
+    803442,
+    811903,
+    820249,
+    828616,
+    837090,
+    846052,
+    855742,
+    866579,
+    878969,
+    893317,
+    909813,
+    928796,
+    950443,
+    974613,
+    1001268,
+    1030086,
+    1060526,
+    1091828,
+    1122758,
+    1151831,
+    1178137,
+    1201806,
+    1223552,
+    1243891,
+    1263628,
+    1283183,
+    1302786,
+    1322256,
+    1341928,
+    1361735,
+    1382067,
+    1403195,
+    1425259,
+    1448418,
+    1472618,
+    1497736,
+    1523451,
+    1549615,
+    1576120,
+    1602967,
+    1630415,
+    1658566,
+    1687671,
+    1717768,
+    1748889,
+    1780904,
+    1813525,
+    1846753,
+    1880164,
+    1913502,
+    1946611,
+    1979239,
+    2011272,
+    2042517,
+    2072953,
+    2102507,
+    2131197,
+    2159206,
+    2186370,
+    2212900,
+    2238749,
+    2264123,
+    2289018,
+    2313525,
+    2337716,
+    2361632,
+    2385337,
+    2408884,
+    2432405,
+    2455842,
+    2479321,
+    2502714,
+    2526225,
+    2549770,
+    2573406,
+    2597188,
+    2620976,
+    2644903,
+    2668929,
+    2693108,
+    2717333,
+    2741568,
+    2765828,
+    2790135,
+    2814306,
+    2838370,
+    2862259,
+    2885861,
+    2909094,
+    2932036,
+    2954546,
+    2976577,
+    2998283,
+    3019648,
+    3040709,
+    3061681,
+    3082659,
+    3103915,
+    3125576,
+    3147730,
+    3170475,
+    3193824,
+    3217598,
+    3241800,
+    3266276,
+    3290931,
+    3315543,
+    3340124,
+    3364361,
+    3388295,
+    3411892,
+    3435108,
+    3457994,
+    3480351,
+    3502409,
+    3524042,
+    3545439,
+    3566506,
+    3587381,
+    3608120,
+    3628709,
+    3649343,
+    3669967,
+    3690745,
+    3711612,
+    3732762,
+    3754228,
+    3776235,
+    3798718,
+    3821910,
+    3845906,
+    3871157,
+    3898000,
+    3927386,
+    3960999,
+    4001731,
+    4054622,
+    4123134,
+    4198733,
+    4268511,
+    4326954,
+    4374739,
+    4413802,
+    4446352,
+    4473976,
+    4497739,
+    4518576,
+    4537002,
+    4553568,
+    4568498,
+    4582138,
+    4594618,
+    4606113,
+    4616663,
+    4626417,
+    4635316,
+    4643302,
+    4650090,
+    4655080,
+    4657183,
+    4657289
+};
+
+#endif // VOLTAGE_TO_SOC_H

Apps/Src/Charge.c

@@ -5,6 +5,7 @@
  */
 #include "Charge.h"
 #include "BSP_Timer.h"
+#include "VoltageToSoC.h"
 
 #define CHARGE_RESOLUTION_SCALE 1000000     // What we need to multiply 100% by before storing. Ensure it is >= 10,000 to avoid depleted charge calculation issues
 #define MAX_CHARGE_MILLI_AMP_HRS 41300    // In miliamp-hours (mAh), calculated from 12950(mah)*14 bats in parallel
@@ -61,7 +62,7 @@ void Charge_Calibrate(int8_t faultType){
  * @return fixed point percentage. Resolution = 0.000001% (45,550,000 = 45.55%)
  */
 uint32_t Charge_GetPercent(void){
-	return charge;
+	return lg21700m50t_ocv_soc_lut_uAh[0];
 }
 
 /** Charge_SetAccum