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ipace: Remove inline comments
Signed-off-by: Christopher Obbard <chris.obbard@collabora.com>
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Christopher Obbard
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1 changed files with 1 additions and 232 deletions
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@ -30,204 +30,6 @@ static int16_t HVBattCellTempColdest = 0;
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static int16_t HVBattCellTempHottest = 0;
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static int16_t HVBattInletCoolantTemp = 0;
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/*
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You mentioned earlier that the modules use LG 3.7V 60AH HW001 cells? Is this still the current understanding?
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Reason I ask is that I'm trying to piece together the technical spec for these module cells (in absence of any known datasheet)
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Do these specs listed below here match up with what you have found?
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Nominal Voltage: 3.7V although I have also see 3.65 and 3.6 listed (Jaguar now state in the owners manual that it is a 388V (nominal) pack therefore with 108S pack that gives nominal 3.6V per cell)
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Max charge current: 60A
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Nominal capacity: 60000mah
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Net weight: 850g
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Internal resistance: 1m(ohm)
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Discharge current (continuous) 120(2C)
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Plus discharge current: 300(5C)
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Cutoff charge voltage: 4.2V
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Cut-off discharge voltage: 2.75V
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That would all be true. But i would not go to the edges of SOC. I use cell from 3.0V to 4.08V and that is it. Everything else i can confirm.
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* The configuration of the BMS is one master and six slave modules, and communication between them is CAN-based.
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* Each slave module has two sections (seen in the pictures above). Each is based on TI 76PL455ATQ (cell monitoring) and NXP processor for communication. So there are 12 CAN nodes, each monitoring 9S cells (3 blocks x 3S)
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https://www.jaguarforums.com/forum/general-tech-help-7/canbus-hacking-ipace-242124/
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https://www.i-paceforum.com/threads/parts-numbers-descriptions-and-names.6839/
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https://docs.google.com/spreadsheets/d/1wNMtpPqMAejNeOZGsPCcgau8HODROzceFcUSfk2lVz8/edit?gid=445693275#gid=445693275
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Now, with the latest sample data I collected this morning (ext. temp is -14c) I am 95% sure that the battery temperature can be read on the CANbus on ECU ID 7E4[7EC] (BECM), and the PID for the battery temperature are 0x492B, 0x492C, 0x492D, 0x492E, 0x492F, 0x4930. These are the 6 values for the 6 plates in the battery. The EV battery coolant outlet temperature sensor is on 7E4[7EC]:0x491B, and the EV battery coolant inlet temperature sensor is on 7E4[7EC]:0x491C. The formula for those temperature is (value-40), and the result is in deg celcius. The external ambient temperature can be read on the HVAC module 733[73B]:0x9924, and the formula is (value*0.5 -40). If you have a way to read the High Speed CANbus (pin 6/14 on the diagnostic connector), ie. TorquePro, you can read it yourself.
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On the BECM module, PID 0x4910, 0x4911, 0x4914 seems to be the real battery % (divide the value by 100). At 100% of battery , this value is around 9600 (9600/100 = 96%), and with a linear regression, I can extrapolate that the value would be around 3% with the dash says 0% of battery. SO I can see a real 3% when the dash says 0%, and a real 96% at 100%.
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PID 0x4913 on BECM seems to be the max regen:
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- 2 bytes
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- when battery is fully charged => 0
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- when battery SOC =93%, 950
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- when battery SOC =82, 4600
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- when battery SOC =60, 10600
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- when battery SOC =8, 15000
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So if you take that value and divide by 100, this gives 150kw at 8% of SOC, 106kw at 60%, etc...
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PID 0x498f on BCCM seems to be the Voltage of the charger plugged in the car
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Unplug: 0
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plug on 240v:
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- 76 7a
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- 77 32,
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- 79 18,
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- 76 8d,
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Plug on 120v:
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- 38 2a
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If you take that (value / 128), you have something close to 240 or close to 110.
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In the BECM module, PID 0x4901, 0x4909, 0x490e ,0x490f are all within the same value range (36000-44000). If we divide them by 100, that could be a battery voltage.
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Since the battery pack is organized with 9 cells in serie, and 4 groups of 9 cells in parallel, I am expecting to have 4 values for these 4 groups in the range of 36000-44000. That's what we have.
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Now I am looking for the Amp (something around 58Ah per cell, or 232Ah per row
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PID 0x490A on BECM is interesting. it is a one 1 Byte. On my sample data, the min is 58 and max is 146. If I apply the formula (value/2 - 40), just like the external temperature sensor , this PID gives a value close to the external temperature when the car stand still in the driveway, without charging, this value goes up a bit when the car is charging on the 240v charger, but significantly higher (+33c) when I did a fast charge yesterday, even if the external temp was -5c. Could be an internal temp sensor on an electronic module.
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This is the status so far for the BECM
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PID Description Formula Unit
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4886
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4887
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48c2
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4900
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4901 Voltage for battery row#1 (9 modules) (256A+B)/100 Volt
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4902
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4903 Max voltage of the pouch cells (256A+B)/1000 Volt
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4904 Min voltage of the pouch cells (256A+B)/1000 Volt
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4905 Maybe a temperature of a componant ?? (A*0.5)-40
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4906 Maybe a temperature of a componant ?? (A*0.5)-41
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4907 Maybe a temperature of a componant ?? (A*0.5)-42
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4908 Maybe a temperature of a componant ?? (A*0.5)-43
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4909 Voltage for battery row#2 (9 modules) (256A+B)/100 Volt
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490a Maybe a temperature of a componant ?? (A*0.5)-43
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490b
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490c Battery current in and out ((256A+B)-0x8000)/24 or 25 Amp
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490d
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490e Voltage for battery row#3 (9 modules) (256A+B)/100 Volt
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490f Voltage for battery row#4 (9 modules) (256A+B)/100 Volt
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4910 Average Battery SOC (256A+B)/100 %
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4911 Min Battery SOC (256A+B)/100 %
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4912 ??? Battery current ??? (256A+B)/160 Amp
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4913 Max Regen (256A+B)/100 Kw
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4914 Max Battery SOC (256A+B)/100 %
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4915
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4916
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4917
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4918
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4919
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491a
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491b EV battery coolant outlet temperature A-40 DegC
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491c EV battery coolant inlet temperature A-40 DegC
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491d
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491e set of bit / flag
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491f
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4920 maybe some voltage 256A+B Volt
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4921 maybe some voltage 256A+B Volt
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4923 set of bit / flag
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492b Battery CSC #1 temperature A-40 DegC
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492c Battery CSC #2 temperature A-40 DegC
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492d Battery CSC #3 temperature A-40 DegC
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492e Battery CSC #4 temperature A-40 DegC
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492f Battery CSC #5 temperature A-40 DegC
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4930 Battery CSC #6 temperature A-40 DegC
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4931
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4933
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4934
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4935
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4936
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4937
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4938
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4939
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4941
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4944 set of bit / flag
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4945 set of bit / flag
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494e set of bit / flag
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4970
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4971
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497a maybe some voltage 256A+B Volt
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497b maybe some voltage 256A+B Volt
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497c maybe some voltage 256A+B Volt
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497e
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497f
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4980
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4981 maybe some voltage 256A+B Volt
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498c
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d015
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d018
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d019
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d020
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d021
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d05b
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d100
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d10e set of bit / flag
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d14d
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d703
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dd00 Elaspe time since factory built (16777216*A+65536*B+256*C+D)/10 Second
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dd01 Odometer 65536*A+256*B+C KM
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dd02
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dd04
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dd05
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dd06
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dd08
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dd09
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*/
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/* TODO: Actually use a proper keepalive message */
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CAN_frame_t ipace_keep_alive = {.FIR = {.B =
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{
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@ -251,7 +53,7 @@ void print_units(char* header, int value, char* units) {
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Serial.print(units);
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}
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void update_values_battery() { /* This function puts fake values onto the parameters sent towards the inverter */
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void update_values_battery() {
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datalayer.battery.status.real_soc = HVBattAvgSOC * 100; //Add two decimals
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@ -408,12 +210,6 @@ void receive_can_battery(CAN_frame_t rx_frame) {
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Serial.print(" ");
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}
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Serial.println("");
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/*
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Startup messages from battery ...
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*/
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}
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int state = 0;
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@ -475,33 +271,6 @@ void send_can_battery() {
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default:
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break;
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}
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// TODO -1 is an error !!
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Serial.print("sending 7e4 err:");
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Serial.println(err);
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Serial.print("sending 7e4_2 err:");
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Serial.println(err);
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/*
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on car this is ... 10x messages of 0x522 01 12 0 3f 0 0 0 0
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9x total
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77605 522 8 22 12 0 0 0 0 0 0
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77914 522 8 22 1 0 0 0 0 0 0
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78014 522 8 22 12 0 0 0 0 0 0
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78324 522 8 22 1 0 0 0 0 0 0
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78424 522 8 22 12 0 0 0 0 0 0
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78734 522 8 22 1 0 0 0 0 0 0
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78834 522 8 22 12 0 0 0 0 0 0
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79144 522 8 22 1 0 0 0 0 0 0
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79247 522 8 22 12 0 0 0 0 0 0
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79554 522 8 22 1 0 0 0 0 0 0
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*/
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}
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}
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