How to decode frame 352 from S/X Plaid battery?

[OOP]

Hello,

i have a strange situation, on older 3/Y Batteries the 352 will decoded correct, but on new one and on the S/X Plaid (Refresh) models the frame 352 has only wrong values.

Did anyone know where i can find the correct data or description of the new battery can communication?

[P.S.Mangelsdorf]

Sounds like once again Tesla has randomly changed things. You may have to try to figure out the new data/offset/gain. In fact, you may have more info on this than anyone else, unfortunately.

[OOP]

yes - tesla did change anything, i have one tesla model 3 and one plaid battery with other decoding of this adresses - but the rest looks simular. For the refresh X/S you have more modules and you can query this simular like the smaller 3/Y ones. but on this address i think tesla did it completly other than before. a simple right/left shifting of bits did not bring me to a positiv result.

[P.S.Mangelsdorf]

yes - tesla did change anything, i have one tesla model 3 and one plaid battery with other decoding of this adresses - but the rest looks simular. For the refresh X/S you have more modules and you can query this simular like the smaller 3/Y ones. but on this address i think tesla did it completly other than before. a simple right/left shifting of bits did not bring me to a positiv result.

If you can share some of the data/logs, folks might be able to assist.

[OOP]

here is a example:

Timestamp: 1702038482.047673 ID: 0352 S Rx DL: 8 01 00 23 01 00 00 ba 0a Channel: can0

[uhi22]

How does this change, depending on temperature, current, voltage, soc?

Just guessing: 23 01 may be 0x0123 is 291 maybe 291 volts.

Or ba 0a may be 0x0aba is 2746 maybe 274.6 volts.

[muehlpower]

I have two DBC files. They both say the same thing. In the second 64|4 cannot be correct

Code: Select all

BO_ 850 ID352BMS_energyStatus: 8 VehicleBus
 SG_ BMS_energyBuffer : 55|8@1+ (0.1,0) [0|25.4] "KWh"  Receiver
 SG_ BMS_energyToChargeComplete : 44|11@1+ (0.1,0) [0|204.6] "KWh"  Receiver
 SG_ BMS_expectedEnergyRemaining : 22|11@1+ (0.1,0) [0|204.6] "KWh"  Receiver
 SG_ BMS_fullChargeComplete : 63|1@1+ (1,0) [0|1] ""  Receiver
 SG_ BMS_idealEnergyRemaining : 33|11@1+ (0.1,0) [0|204.6] "KWh"  Receiver
 SG_ BMS_nominalEnergyRemaining : 11|11@1+ (0.1,0) [0|204.6] "KWh"  Receiver
 SG_ BMS_nominalFullPackEnergy : 0|11@1+ (0.1,0) [0|204.6] "KWh"  Receiver

Code: Select all

BO_ 850 BMS_energyStatus: 8 VEH
 SG_ BMS_energyBuffer: 55|8@1+ (0.1,0) [0|0] "KWh" X
 SG_ BMS_energyCounter: 64|4@1+ (1,0) [0|0] "" X
 SG_ BMS_energyToChargeComplete: 44|11@1+ (0.1,0) [0|0] "KWh" X
 SG_ BMS_expectedEnergyRemaining: 22|11@1+ (0.1,0) [0|0] "KWh" X
 SG_ BMS_idealEnergyRemaining: 33|11@1+ (0.1,0) [0|0] "KWh" X
 SG_ BMS_nominalEnergyRemaining: 11|11@1+ (0.1,0) [0|0] "KWh" X
 SG_ BMS_nominalFullPackEnergy: 0|11@1+ (0.1,0) [0|0] "KWh" X
 SG_ BMS_fullyCharged : 63|1@1+ (1,0) [0|1] "" X

[OOP]

The SOC is wrong too at this pack - i dont know why. i thin the expected and the normal full value is the problem at this condition.

i calculate the SOC with this 2 values:
soc = round(expected_energy_remaining / nominal_full_pack_energy * 100)

But a 0 of the BMS_nominalFullPackEnergy can not be true.

[OOP]

right now i have a simular BMS that writes confusing data:


Timestamp: 1704294961.760159 ID: 0352 S Rx DL: 8 01 00 24 01 24 01 80 09 Channel: can0

Code: Select all

 [01]4.0588V  [02]4.0593V  [03]4.0579V  [04]4.0592V  [05]4.057V   [06]4.0588V  [07]4.0588V  [08]4.0599V  [09]4.0594V  [10]4.06V    [11]4.0601V  [12]4.0649V
 [13]4.0648V  [14]4.065V   [15]4.0647V  [16]4.0647V  [17]4.0647V  [18]4.0648V  [19]4.0648V  [20]4.0648V  [21]4.065V   [22]4.0652V  [23]4.065V   [24]4.0653V
 [25]4.0653V  [26]4.0655V  [27]4.0642V  [28]4.0655V  [29]4.0657V  [30]4.0653V  [31]4.0656V  [32]4.0659V  [33]4.0656V  [34]4.0659V  [35]4.0656V  [36]4.0631V
 [37]4.0631V  [38]4.0631V  [39]4.0632V  [40]4.0632V  [41]4.0629V  [42]4.0628V  [43]4.0628V  [44]4.0628V  [45]4.0628V  [46]4.0624V  [47]4.062V   [48]4.0624V
 [49]4.0576V  [50]4.058V   [51]4.0573V  [52]4.0578V  [53]4.058V   [54]4.058V   [55]4.058V   [56]4.0588V  [57]4.0589V  [58]4.0586V  [59]4.0587V  [60]4.0591V
 [61]4.0605V  [62]4.0607V  [63]4.0609V  [64]4.0604V  [65]4.0606V  [66]4.0608V  [67]4.0606V  [68]4.0606V  [69]4.0604V  [70]4.0604V  [71]4.0606V  [72]4.0605V
 [73]4.0607V  [74]4.0577V  [75]4.0575V  [76]4.058V   [77]4.0576V  [78]4.0576V  [79]4.0578V  [80]4.0579V  [81]4.058V   [82]4.058V   [83]4.058V   [84]4.0572V
 [85]4.0565V  [86]4.0557V  [87]4.0563V  [88]4.0564V  [89]4.056V   [90]4.0558V  [91]4.0556V  [92]4.055V   [93]4.0546V  [94]4.0535V  [95]4.0535V  [96]4.0533V
  battery_voltage                : 389.27  V      battery_amps                   : 0.0     A      battery_charge_time_remaining  : 409.5   min
  min_voltage                    : 240.70  V      max_discharge_current          : 0.0     KW     max_charge_current             : 0.0     A
  max_voltage                    : 402.68  V      regenerative_limit             : 0.0     KWh    discharge_limit                : 0.0     KWh
  max_heat_park                  : 0.0     KWh    hvac_max_power                 : 0.0     KWh    soc_max                        : 16.0    %
  soc_ave                        : 12.6    %      soc_vi                         : 10.0    %      soc_min                        : 11.8    %
  bms_bat_temp_pct               : 33.2    C      bat_beginning_of_life          : 77.8    KWh    high_voltage                   : 9.5214  V
  low_voltage                    : 14.218  V      output_current                 : 0.0     A      soc                            : 400     %
  energy_buffer                  : 1.9000  KWh    energy_to_charge_complete      : 0.0     KWh    expected_energy_remaining      : 0.4     KWh
  full_charge_complete           : 0              ideal_energy_remaining         : 14.600  KWh    nominal_energy_remaining       : 115.2   KWh
  nominal_full_pack_energy       : 0.1     KWh    total_discharge                : 24157.  KWh    total_charge                   : 24902.  KWh
  ac_charge_total_module3        : 3813.7  KWh    dc_charge_total_module3        : 699.50  KWh    discharge_total_module4        : 5897.3  KWh
  charge_total_module4           : 6059.6  KWh    ac_charge_total_module4        : 3639.0  KWh    dc_charge_total_module4        : 664.02  KWh
  ac_charger_total               : 14896.  KWh    dc_charger_total               : 2726.1  KWh    regen_charge_total             : 7280.0  KWh
  drive_discharge_total          : 21093.  KWh    discharge_total_module1        : 5897.2  KWh    charge_total_module1           : 6060.7  KWh
  ac_charge_total_module1        : 3639.1  KWh    dc_charge_total_module1        : 663.99  KWh    discharge_total_module2        : 6228.0  KWh
  charge_total_module2           : 6399.5  KWh    ac_charge_totalmodule2         : 3814.0  KWh    dc_charge_total_module2        : 699.64  KWh
  discharge_total_module3        : 6227.4  KWh    charge_total_module3           : 6398.3  KWh

If i check the voltages, the battery should be very full, but the SOC writes a totaly diffrent value.