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https://github.com/dexterbg/KlausBMS.git
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- Added temperature compensation for max charge current & power levels
This commit is contained in:
Michael Balzer
parent
7a136c9d2b
commit
b9f6fefbec
3 changed files with 67 additions and 14 deletions
55
KlausBMS.ino
55
KlausBMS.ino
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@ -26,7 +26,7 @@
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*
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*/
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#define KLAUS_BMS_VERSION "V0.8.4 (2017-10-20)"
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#define KLAUS_BMS_VERSION "V0.9.0 (2017-11-08)"
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#include <EEPROM.h>
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#include <util/crc16.h>
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@ -133,12 +133,19 @@ public:
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// Configuration variables
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//
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// Maximum charge current to use [A]:
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// Maximum charge current to use [A]
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// …at 20 °C & higher:
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byte max_charge_current;
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// …at zero °C:
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byte max_charge_current_0c;
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// Maximum driving & recuperation power limits to use [W]:
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// Maximum driving & recuperation power limits to use [W]
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// …at 20 °C & higher:
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unsigned int max_drive_power;
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unsigned int max_recup_power;
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// …at zero °C:
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unsigned int max_drive_power_0c;
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unsigned int max_recup_power_0c;
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// Drive power cutback [%]:
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// (100% at FULL → 100% at <SOC1>% → <LVL2>% at <SOC2>% → 0% at EMPTY)
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@ -245,9 +252,14 @@ public:
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max_charge_current = MAX_CHARGE_CURRENT;
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max_charge_current_0c = MAX_CHARGE_CURRENT_0C;
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max_drive_power = MAX_DRIVE_POWER;
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max_recup_power = MAX_RECUP_POWER;
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max_drive_power_0c = MAX_DRIVE_POWER_0C;
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max_recup_power_0c = MAX_RECUP_POWER_0C;
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drv_cutback_soc1 = DRV_CUTBACK_SOC1;
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drv_cutback_soc2 = DRV_CUTBACK_SOC2;
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drv_cutback_lvl2 = DRV_CUTBACK_LVL2;
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@ -1048,6 +1060,17 @@ public:
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recpwr /= 2;
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chgcur = min(chgcur, 5);
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}
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else if (min(temp_f, temp_r) < 20) {
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// reduce power levels linear by temperature:
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float dt = 20 - min(temp_f, temp_r);
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float dy;
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dy = (max_drive_power - max_drive_power_0c) / 20;
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drvpwr -= dt * dy;
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dy = (max_recup_power - max_recup_power_0c) / 20;
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recpwr -= dt * dy;
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dy = (max_charge_current - max_charge_current_0c) / 20;
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chgcur -= dt * dy;
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}
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#endif // CALIBRATION_MODE
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@ -1150,6 +1173,12 @@ public:
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max_charge_current = constrain(atoi(arg), 5, 35);
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}
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}
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else if (strcasecmp(cmd, "mcc0") == 0) {
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// mcc0 <cur>
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if (arg = strtok(NULL, " ")) {
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max_charge_current_0c = constrain(atoi(arg), 5, 35);
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}
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}
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else if (strcasecmp(cmd, "sc") == 0) {
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// sc [<prc>]
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@ -1162,7 +1191,7 @@ public:
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}
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else if (strcasecmp(cmd, "mpw") == 0) {
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// mpw <drv> <rec>
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// mpw <drv> <rec> <drv0c> <rec0c>
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if (arg = strtok(NULL, " ")) {
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max_drive_power = constrain(atoi(arg), 500, 30000);
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}
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@ -1170,6 +1199,15 @@ public:
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max_recup_power = constrain(atoi(arg), 500, 30000);
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}
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}
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else if (strcasecmp(cmd, "mpw0") == 0) {
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// mpw0 <drv> <rec>
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if (arg = strtok(NULL, " ")) {
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max_drive_power_0c = constrain(atoi(arg), 500, 30000);
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}
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if (arg = strtok(NULL, " ")) {
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max_recup_power_0c = constrain(atoi(arg), 500, 30000);
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}
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}
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else if (strcasecmp(cmd, "dcb") == 0) {
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// dcb <soc1> <soc2> <lvl2>
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@ -1249,9 +1287,11 @@ public:
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s->println(F("HELP:\r\n"
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" soh <prc> -- set SOH%\r\n"
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" soc <prc> -- set SOC%\r\n"
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" mcc <cur> -- set max charge current\r\n"
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" mcc <cur> -- set max charge current @ 20°C\r\n"
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" mcc0 <cur> -- set max charge current @ 0°C\r\n"
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" sc [<prc>] -- stop charge / set stop SOC\r\n"
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" mpw <drv> <rec> -- set max power\r\n"
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" mpw <drv> <rec> -- set max power @ 20°C\r\n"
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" mpw0 <drv> <rec> -- set max power @ 0°C\r\n"
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" dcb <soc1> <soc2> <lvl2> -- set drive cutback\r\n"
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" vrd <min> <max> -- set voltage range discharging\r\n"
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" vrc <min> <max> -- set voltage range charging\r\n"
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@ -1279,9 +1319,12 @@ public:
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s->println();
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s->print(F("- MCC = ")); s->println(max_charge_current);
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s->print(F("- MCC0 = ")); s->println(max_charge_current_0c);
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s->print(F("- SC = ")); s->println(chg_stop_soc);
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s->print(F("- MPW = ")); s->print(max_drive_power);
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s->print(' '); s->println(max_recup_power);
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s->print(F("- MPW0 = ")); s->print(max_drive_power_0c);
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s->print(' '); s->println(max_recup_power_0c);
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s->print(F("- DCB = ")); s->print(drv_cutback_soc1);
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s->print(' '); s->print(drv_cutback_soc2);
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s->print(' '); s->println(drv_cutback_lvl2);
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@ -49,8 +49,12 @@
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// OPERATION
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// --------------------------------------------------------------------------
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// Maximum charge current to use [A] (5…35):
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#define MAX_CHARGE_CURRENT 35
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// Maximum charge current to use [A] (5…35)
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// …at 20 °C and higher:
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#define MAX_CHARGE_CURRENT 35
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// …at 0 °C:
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#define MAX_CHARGE_CURRENT_0C 20
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// Charge current → power drawn from socket:
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// 35 A = 2,2 kW
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// 30 A = 2,1 kW
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@ -60,9 +64,13 @@
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// 10 A = 0,7 kW
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// 5 A = 0,4 kW
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// Maximum driving & recuperation power limits to use [W] (500…30000):
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#define MAX_DRIVE_POWER 25000
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#define MAX_RECUP_POWER 12500
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// Maximum driving & recuperation power limits to use [W] (500…30000)
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// …at 20 °C and higher:
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#define MAX_DRIVE_POWER 25000
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#define MAX_RECUP_POWER 12500
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// …at 0 °C:
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#define MAX_DRIVE_POWER_0C 16000
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#define MAX_RECUP_POWER_0C 6000
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// Drive power cutback [%]:
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@ -97,9 +97,11 @@ After sending any command, the KlausBMS will respond with the current configurat
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| --- | --- |
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| `soh <prc>` | set SOH% |
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| `soc <prc>` | set SOC% |
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| `mcc <cur>` | set max charge current |
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| `mcc <cur>` | set max charge current at 20 °C |
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| `mcc0 <cur>` | set max charge current at 0 °C |
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| `sc [<prc>]` | stop charge / set charge stop SOC |
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| `mpw <drv> <rec>` | set max power |
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| `mpw <drv> <rec>` | set max power at 20 °C |
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| `mpw0 <drv> <rec>` | set max power at 0 °C |
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| `dcb <soc1> <soc2> <lvl2>` | set drive cutback |
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| `vrd <min> <max>` | set voltage range discharging |
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| `vrc <min> <max>` | set voltage range charging |
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