Feature: LEAF charger + Cell monitoring

Software/Software.ino

@@ -70,6 +70,7 @@ uint8_t bms_status = ACTIVE;            // ACTIVE - [0..5]<>[STANDBY,INACTIVE,DA
 uint16_t stat_batt_power = 0;           // Power going in/out of battery
 uint16_t cell_max_voltage = 3700;       // Stores the highest cell voltage value in the system
 uint16_t cell_min_voltage = 3700;       // Stores the minimum cell voltage value in the system
+uint16_t cellvoltages[120];             // Stores all cell voltages
 bool LFP_Chemistry = false;
 
 // Common charger parameters
@@ -413,8 +414,12 @@ void receive_can() {  // This section checks if we have a complete CAN message i
 #ifdef SMA_CAN
       receive_can_sma(rx_frame);
 #endif
+      // Charger
 #ifdef CHEVYVOLT_CHARGER
       receive_can_chevyvolt_charger(rx_frame);
+#endif
+#ifdef NISSANLEAF_CHARGER
+      receive_can_nissanleaf_charger(rx_frame);
 #endif
     } else {
       //printf("New extended frame");
@@ -477,6 +482,9 @@ void send_can() {
 #ifdef CHEVYVOLT_CHARGER
   send_can_chevyvolt_charger();
 #endif
+#ifdef NISSANLEAF_CHARGER
+  send_can_nissanleaf_charger();
+#endif
 }
 
 #ifdef DUAL_CAN

Software/USER_SETTINGS.cpp

@@ -15,7 +15,7 @@ volatile uint16_t MAXCHARGEAMP =
 volatile uint16_t MAXDISCHARGEAMP =
     300;  //30.0A , BYD CAN specific setting, Max discharge speed in Amp (Some inverters needs to be artificially limited)
 
-/* Charger settings */
+/* Charger settings (Optional, when generator charging) */
 volatile float CHARGER_SET_HV = 384;      // Reasonably appropriate 4.0v per cell charging of a 96s pack
 volatile float CHARGER_MAX_HV = 420;      // Max permissible output (VDC) of charger
 volatile float CHARGER_MIN_HV = 200;      // Min permissible output (VDC) of charger

Software/USER_SETTINGS.h

@@ -41,6 +41,7 @@
 
 /* Select charger used (Optional) */
 //#define CHEVYVOLT_CHARGER //Enable this line to control a Chevrolet Volt charger connected to battery - for example, when generator charging or using an inverter without a charging function.
+//#define NISSANLEAF_CHARGER //Enable this line to control a Nissan LEAF PDM connected to battery - for example, when generator charging
 
 /* Battery limits: These are set in the USER_SETTINGS.cpp file, or later on via the Webserver */
 extern volatile uint16_t BATTERY_WH_MAX;
@@ -50,7 +51,7 @@ extern volatile uint16_t MAXCHARGEAMP;
 extern volatile uint16_t MAXDISCHARGEAMP;
 extern volatile uint8_t AccessPointEnabled;
 
-/* Charger limits: Set in the USER_SETTINGS.cpp or later in the webserver */
+/* Charger limits (Optional): Set in the USER_SETTINGS.cpp or later in the webserver */
 extern volatile float charger_setpoint_HV_VDC;
 extern volatile float charger_setpoint_HV_IDC;
 extern volatile float charger_setpoint_HV_IDC_END;

Software/src/battery/NISSAN-LEAF-BATTERY.cpp

@@ -237,6 +237,11 @@ void update_values_leaf_battery() { /* This function maps all the values fetched
     max_target_charge_power = 0;  //No need to charge further, set max power to 0
   }
 
+  //Map all cell voltages to the global array
+  for (int i = 0; i < 96; ++i) {
+    cellvoltages[i] = cell_voltages[i];
+  }
+
   bms_status = ACTIVE;  //Startout in active mode
 
   /*Extra safety functions below*/
@@ -856,7 +861,10 @@ void send_can_leaf_battery() {
         break;
     }
 
+//Only send this message when NISSANLEAF_CHARGER is not defined (otherwise it will collide!)
+#ifndef NISSANLEAF_CHARGER
     ESP32Can.CANWriteFrame(&LEAF_1F2);  //Contains (CHG_STA_RQ == 1 == Normal Charge)
+#endif
 
     mprun10r = (mprun10r + 1) % 20;  // 0x1F2 patter repeats after 20 messages. 0-1..19-0
 

Software/src/battery/NISSAN-LEAF-BATTERY.h

@@ -21,11 +21,12 @@ extern uint16_t max_target_charge_power;     //W,    0-60000
 extern uint8_t bms_status;                   //Enum, 0-5
 extern uint8_t bms_char_dis_status;          //Enum, 0-2
 extern uint16_t stat_batt_power;             //W,    Goes thru convert2unsignedint16 function (5W = 5, -5W = 65530)
-extern uint16_t temperature_min;   //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
-extern uint16_t temperature_max;   //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
-extern uint16_t cell_max_voltage;  //mV,   0-4350
-extern uint16_t cell_min_voltage;  //mV,   0-4350
-extern uint8_t LEDcolor;           //Enum, 0-10
+extern uint16_t temperature_min;    //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
+extern uint16_t temperature_max;    //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
+extern uint16_t cell_max_voltage;   //mV,   0-4350
+extern uint16_t cell_min_voltage;   //mV,   0-4350
+extern uint8_t LEDcolor;            //Enum, 0-10
+extern uint16_t cellvoltages[120];  //mV    0-4350 per cell
 extern bool batteryAllowsContactorClosing;  //Bool, 1=true, 0=false
 
 void update_values_leaf_battery();

Software/src/battery/TESLA-MODEL-3-BATTERY.cpp

@@ -451,6 +451,22 @@ void receive_can_tesla_model_3_battery(CAN_frame_t rx_frame) {
         min_temp = (rx_frame.data.u8[3] * 5) - 400;  //Multiply by 5 and remove offset to get C+1 (0x61*5=485-400=8.5*C)
       }
       break;
+    case 0x401:  // Cell stats
+      mux = (rx_frame.data.u8[0]);
+
+      static uint16_t volts;
+
+      if (rx_frame.data.u8[1] == 0x2A)  // status byte must be 0x2A to read cellvoltages
+      {
+        // Example, frame3=0x89,frame2=0x1D = 35101 / 10 = 3510mV
+        volts = ((rx_frame.data.u8[3] << 8) | rx_frame.data.u8[2]) / 10;
+        cellvoltages[mux * 3] = volts;
+        volts = ((rx_frame.data.u8[5] << 8) | rx_frame.data.u8[4]) / 10;
+        cellvoltages[1 + mux * 3] = volts;
+        volts = ((rx_frame.data.u8[7] << 8) | rx_frame.data.u8[6]) / 10;
+        cellvoltages[2 + mux * 3] = volts;
+      }
+      break;
     case 0x2d2:
       //Min / max limits
       min_voltage = ((rx_frame.data.u8[1] << 8) | rx_frame.data.u8[0]) * 0.01 * 2;  //Example 24148mv * 0.01 = 241.48 V

Software/src/battery/TESLA-MODEL-3-BATTERY.h

@@ -24,11 +24,12 @@ extern uint16_t max_target_charge_power;     //W,    0-60000
 extern uint8_t bms_status;                   //Enum, 0-5
 extern uint8_t bms_char_dis_status;          //Enum, 0-2
 extern uint16_t stat_batt_power;             //W,    Goes thru convert2unsignedint16 function (5W = 5, -5W = 65530)
-extern uint16_t temperature_min;   //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
-extern uint16_t temperature_max;   //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
-extern uint16_t cell_max_voltage;  //mV,   0-4350
-extern uint16_t cell_min_voltage;  //mV,   0-4350
-extern uint8_t LEDcolor;           //Enum, 0-10
+extern uint16_t temperature_min;    //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
+extern uint16_t temperature_max;    //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
+extern uint16_t cell_max_voltage;   //mV,   0-4350
+extern uint16_t cell_min_voltage;   //mV,   0-4350
+extern uint16_t cellvoltages[120];  //mV    0-4350 per cell
+extern uint8_t LEDcolor;            //Enum, 0-10
 extern bool batteryAllowsContactorClosing;   //Bool, 1=true, 0=false
 extern bool inverterAllowsContactorClosing;  //Bool, 1=true, 0=false
 extern bool LFP_Chemistry;

Software/src/battery/TEST-FAKE-BATTERY.cpp

@@ -25,17 +25,17 @@ void update_values_test_battery() { /* This function puts fake values onto the p
 
   StateOfHealth = 9900;  // 99.00%
 
-  battery_voltage = 3700;  // 370.0V
+  //battery_voltage = 3700;  // 370.0V , value set in startup in .ino file, editable via webUI
 
   battery_current = 0;  // 0 A
 
   capacity_Wh = 30000;  // 30kWh
 
   remaining_capacity_Wh = 15000;  // 15kWh
 
-  cell_max_voltage = 3750;
+  cell_max_voltage = 3596;
 
-  cell_min_voltage = 3730;
+  cell_min_voltage = 3500;
 
   stat_batt_power = 0;  // 0W
 
@@ -47,6 +47,10 @@ void update_values_test_battery() { /* This function puts fake values onto the p
 
   max_target_charge_power = 5000;  // 5kW
 
+  for (int i = 0; i < 97; ++i) {
+    cellvoltages[i] = 3500 + i;
+  }
+
 /*Finally print out values to serial if configured to do so*/
 #ifdef DEBUG_VIA_USB
   Serial.println("FAKE Values going to inverter");

Software/src/battery/TEST-FAKE-BATTERY.h

@@ -21,10 +21,11 @@ extern uint16_t max_target_charge_power;     //W,    0-60000
 extern uint8_t bms_status;                   //Enum, 0-5
 extern uint8_t bms_char_dis_status;          //Enum, 0-2
 extern uint16_t stat_batt_power;             //W,    Goes thru convert2unsignedint16 function (5W = 5, -5W = 65530)
-extern uint16_t temperature_min;   //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
-extern uint16_t temperature_max;   //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
-extern uint16_t cell_max_voltage;  //mV,   0-4350
-extern uint16_t cell_min_voltage;  //mV,   0-4350
+extern uint16_t temperature_min;    //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
+extern uint16_t temperature_max;    //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
+extern uint16_t cell_max_voltage;   //mV,   0-4350
+extern uint16_t cell_min_voltage;   //mV,   0-4350
+extern uint16_t cellvoltages[120];  //mV 0-5000 per cell
 extern bool batteryAllowsContactorClosing;   //Bool, 1=true, 0=false
 extern bool inverterAllowsContactorClosing;  //Bool, 1=true, 0=false
 extern uint8_t LEDcolor;                     //Enum, 0-10

Software/src/charger/CHARGERS.h

@@ -2,7 +2,11 @@
 #define CHARGERS_H
 
 #ifdef CHEVYVOLT_CHARGER
-#include "chevyvolt.h"
+#include "CHEVY-VOLT-CHARGER.h"
+#endif
+
+#ifdef NISSANLEAF_CHARGER
+#include "NISSAN-LEAF-CHARGER.h"
 #endif
 
 #endif

Software/src/charger/chevyvolt.cpp → Software/src/charger/CHEVY-VOLT-CHARGER.cpp

@@ -1,4 +1,4 @@
-#include "chevyvolt.h"
+#include "CHEVY-VOLT-CHARGER.h"
 #include "../lib/miwagner-ESP32-Arduino-CAN/CAN_config.h"
 #include "../lib/miwagner-ESP32-Arduino-CAN/ESP32CAN.h"
 

Software/src/charger/chevyvolt.h → Software/src/charger/CHEVY-VOLT-CHARGER.h

@@ -1,5 +1,5 @@
-#ifndef CHEVYVOLT_H
-#define CHEVYVOLT_H
+#ifndef CHEVYVOLT_CHARGER_H
+#define CHEVYVOLT_CHARGER_H
 #include <Arduino.h>
 #include "../../USER_SETTINGS.h"
 #include "../lib/miwagner-ESP32-Arduino-CAN/ESP32CAN.h"