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Changes for page 3.3 Control

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1 -Battery management systems.BMS Main 3.3\. Configuration.WebHome
1 +drafts.bms-main-3.3\. Settings.WebHome
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1 -(% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
2 -= Settings =
1 +=== 3.3.1 Common settings ===
3 3  
4 -(% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
5 -== Control ==
6 -
7 -=== Common settings ===
8 -
9 9  To change the common BMS settings, select the "Control → Common settings" section:
10 10  
11 -[[image:1735054851946-552.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
5 +[[image:1733322611547-671.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
12 12  
13 13  In this section:
14 14  
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16 16  * Cell resistance – nominal (maximum) internal resistance of the cells, Ohm;
17 17  * Relax time (after charging) – a relaxation time after charging, second;
18 18  * Relax time (atfer discharging) – a relaxation time after discharging, second;
19 -* Reset parameters – a command to reset cells state of charge, capacity, and resistance;
20 -* Method of calculating the battery voltage:
21 -** Summation of cell voltages – the overall voltage is calculated as on sum of all cells in the battery;
22 -** Using voltage before contactors – the overall voltage is estimated as voltage before contactors measured by BMS.
13 +* Number of cycles – a number of charge-discharge cycles;
14 +* Reset parameters – a command to reset cells state of charge, capacity, and resistance.
23 23  
24 24  The values “Capacity”, “Resistance”, “Cycles” are used to calculate the SOC of cells and the battery.
25 25  
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33 33  
34 34  The “Reset parameters” command is used for starting-up and adjustment of the battery.
35 35  
36 -=== SOC estimation ===
28 +=== 3.3.2 SOC estimation ===
37 37  
38 38  The BMS Main 3 device calculates the state of charge of the battery (SOC) using two algorithms:
39 39  
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44 44  
45 45  To change the estimation algorithm for calculating the battery SOC, select the "Control → SOC estimation → Algorithm" section:
46 46  
39 +[[image:1733322611549-423.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="148" width="800"]]
47 47  
48 -[[image:1735056107942-306.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="141" width="800"]]
49 -
50 50  The following estimation algorithms supported:
51 51  
52 52  * Voltage – by open circuit voltage;
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70 70  
71 71  * Minimal SOC – the battery SOC is assumed to be the minimum SOC among the cells;
72 72  * Average SOC – the battery SOC is taken equal to the arithmetic average of the cell SOC;
73 -* Min-Max SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells. Final SOC will be a) 100% if any cell have 100% SOC, b) 0% if any cell have 0% SOC;
74 -* Max-Min SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells. Final SOC will be a) 100% if all cells have 100% SOC, b) 0% if all cells have 0% SOC;
64 +* Min-Max SOC – the battery SOC is taken based on the minimum and maximum SOC of the cells (recommended method).
75 75  
76 76  Other parameters:
77 77  
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85 85  * Coulomb counting correction (temperature) – the dependence of battery capacity on temperature;
86 86  * Coulomb counting correction (cycles) – the dependence of battery capacity on the number of charge-discharge cycles.
87 87  
88 -=== SOC correction ===
78 +=== 3.3.3 SOC correction ===
89 89  
90 -The BMS Main 3 device can recalculate the battery SOC after long-term storage or after long-term working in the case when the battery was not charged fully or discharged totally. Recalculation is done based on the tabular dependency Uocv = Uocv (SOC, t) (see [[SOC estimation>>doc:||anchor="HSOCestimation"]]).
80 +The BMS Main 3 device can recalculate the battery SOC after long-term storage or after long-term working in the case when the battery was not charged fully or discharged totally. Recalculation is done based on the tabular dependency Uocv = Uocv (SOC, t) (see section** **2.3.2).
91 91  
92 92  To configure parameters for periodically correcting the battery state of charge, select the "Control → SOC correction" section:
93 93  
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102 102  * Ignore the linear zone – a flag to ignore linear SOC zone while correction (recommended to be unset);
103 103  * Last correction timestamp – time when last correction was made.
104 104  
105 -=== Resistance estimation ===
95 +=== 3.3.4 Resistance estimation ===
106 106  
107 107  Calculation of the resistance of cells is carried out in two ways. The first method is used when the battery passes from a relaxation state to a charge or discharge state, wherein the cell resistance value
108 108  
109 -{{formula fontSize="NORMAL" imageType="PNG"}}
110 -R = \frac{U-U_{ocv}}{I_{stable}}
111 -{{/formula}}
99 +R = (U-U,,ocv,,) / I,,stable,,,
112 112  
113 -where U — the cell voltage measured in the charge or discharge state, V; U,,ocv,, — cell voltage measured in the state of relaxation (before switching to the state of charge or discharge); I,,stable,, — stabilized current through the cell in the state of charge or discharge.
101 +where U is the cell voltage measured in the charge or discharge state, V; U,,ocv,, is the cell voltage measured in the state of relaxation (before switching to the state of charge or discharge); I,,stable,, – stabilized current through the cell in the state of charge or discharge.
114 114  
115 115  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
116 116  
117 117  R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,) provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
118 118  
119 -
120 120  (Q,,max,, is the maximum cell capacity),
121 121  
122 122  where U,,2,, is the voltage on the cell at the moment when the stabilized current I,,stable2,, is flowing through it; U,,1,, – the voltage on the cell at the moment when the stabilized current I,,stable1,, flowing through it.
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135 135  * Minimum SOC – minimum cell SOC value for resistance calculation;
136 136  * Maximum SOC – maximum cell SOC value for resistance calculation.
137 137  
138 -The calculated resistance is accepted by the system as valid (and therefore updated) if its value is in the range from Resistance/2 to “Maximum resistance factor” × Resistance, where "Resistance" is the nominal resistance of the cell (see [[Common settings>>doc:||anchor="HCommonsettings"]]). If the calculated resistance value is greater than the value (Maximum resistance factor × Resistance), the updated resistance value will be equal to the value (Maximum resistance factor × Resistance).
125 +The calculated resistance is accepted by the system as valid (and therefore updated) if its value is in the range from Resistance/2 to “Maximum resistance factor” × Resistance, where "Resistance" is the nominal resistance of the cell (see section 2.3.1). If the calculated resistance value is greater than the value (Maximum resistance factor × Resistance), the updated resistance value will be equal to the value (Maximum resistance factor × Resistance).
139 139  
140 -=== Low SOC (signal) ===
127 +=== 3.3.5 Low SOC (signal) ===
141 141  
142 142  To change the parameters of the generation a signal about low battery level, select the "Control → Low SOC (signal)" section:
143 143  
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162 162  
163 163  The "Low SOC signal" is indicative and can be output to a discrete output or a power switch.
164 164  
165 -=== High charging current (signal) ===
152 +=== 3.3.6 High charging current (signal) ===
166 166  
167 167  To change the parameters of the generation high-current signal, select the "Control → High charging current (signal)" section:
168 168  
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187 187  
188 188  The "High charging current" signal is indicative and can be output to a discrete output or a power switch.
189 189  
190 -=== Charge map ===
177 +=== 3.3.7 Charge map ===
191 191  
192 192  The BMS Main 3 device calculates the maximum allowable charge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
193 193  
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215 215  
216 216  Charging current limit = Maximum charging current × Kcs × Kcc × Kcv × Kct
217 217  
218 -=== Discharge map ===
205 +=== 3.3.8 Discharge map ===
219 219  
220 220  The BMS Main 3 device calculates the maximum allowable discharge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
221 221  
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243 243  
244 244  Discharging current limit = Maximum discharging current × Kds × Kdc × Kdv × Kdt
245 245  
246 -=== Charge map (PEAK & CONTINUOUS) ===
233 +=== 3.3.9 Charge map (PEAK & CONTINUOUS) ===
247 247  
248 248  The BMS Main 3 has an alternative algorithm for the maximum allowed charging current based on peak and continuous battery operating modes.
249 249  
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271 271  I,,continuous,, = Maximum CONTINUOUS charge current × K,,cc,,
272 272  
273 273  
274 -=== Discharge map (PEAK & CONTINUOUS) ===
261 +=== 3.3.10 Discharge map (PEAK & CONTINUOUS) ===
275 275  
276 276  The BMS Main 3 has an alternative algorithm for the maximum allowed discharging current based on peak and continuous battery operating modes.
277 277  
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298 298  
299 299  I,,continuous,, = Maximum CONTINUOUS discharge current × K,,dc,,
300 300  
301 -=== Charge ===
288 +=== 3.3.11 Charge ===
302 302  
303 303  There are two contactors that serve charging the battery: a charging contactor and an allow charging contactor. With the help of the allow charging contactor, the BMS commands the charger to start or stop charging.
304 304  
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373 373  
374 374  Note – The allow charging contactor closes under two independent conditions: 1) the voltage on the cells reaches the “Voltage to reset the “Ready to charge"” level and 2) the "Delay before recharging" time has passed since the opening of the allow charging contactor.
375 375  
376 -=== Discharge ===
363 +=== 3.3.12 Discharge ===
377 377  
378 378  The device controls the discharging contactor to connect battery to the load.
379 379  
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447 447  * Voltage to clear the “Ready to discharge” – a threshold voltage level on the cell, V; if the voltage of any cell is below this level, the “Ready to discharge” signal is cleared;
448 448  * Voltage to reset the “Ready to discharge” – a tolerant voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set;
449 449  
450 -=== Charge/Discharge ===
437 +=== 3.3.13 Charge/Discharge ===
451 451  
452 452  The BMS Main 3 device can control the charging/discharging contactor, which combines algorithms of charging and discharging contactor. It behaves as a charging contactor when “Charge request” or “Charger connected” is set, otherwise – as a discharging contactor.
453 453  
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459 459  
460 460  * Enable – a flag to enable the charge/discharge controller.
461 461  
462 -=== Discharge (AUX) ===
449 +=== 3.3.14 Discharge (AUX) ===
463 463  
464 464  The BMS Main 3 device can control the power supply of external equipment using the auxiliary (AUX) discharging contactor. An example of external equipment can be an inverter that converts DC to AC to power a service laptop and other devices.
465 465  
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486 486  * Maximum voltage – maximum battery voltage, V;
487 487  * Switch off the discharging (AUX) contactor on errors – the auxiliary (AUX) discharging contactor opens if the following errors occur: Undervoltage, Overcurrent, High temperature (DCH), Short circuit, Critical error.
488 488  
489 -=== Main contactor ===
476 +=== 3.3.15 Main contactor ===
490 490  
491 491  The BMS Main 3 device controls the main contactor. The main contactor is usually placed in the common (minus) battery line for opening the charge and discharge circuits in case of sealing of the charging or discharging contactors.
492 492  
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541 541  * Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, s;
542 542  * Keep the contactor open until the device is restarted – a flag for keeping the main contactor open until the system is reset.
543 543  
544 -=== Cell balancing ===
531 +=== 3.3.16 Cell balancing ===
545 545  
546 546  Balancing makes the voltage of all cells equal to the minimum cell voltage.
547 547  
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577 577  ** Balance on charge or relaxed - balancing is performed while and after the charging and in the relaxed state (in “Charge ON”, “Charge OFF”, “Relaxed (after charging)” and “Relaxed (after discharging)” states);
578 578  ** Balance always – balancing is always performed regardless the battery state;
579 579  
580 -[[image:1733322883462-975.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="74" width="600"]]
567 +[[image:1733322883462-975.png]]
581 581  
582 582  * Minimum cell voltage to start balancing, V;
583 583  * Voltage deviation to start balancing;
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584 584  * Voltage deviation to stop balancing;
585 585  * Command to discharge all cells – a flag to force the balancing of all cells.
586 586  
587 -=== Series balancing ===
574 +=== 3.3.17 Series balancing ===
588 588  
589 589  The BMS Main 3 device supports work with two independent (galvanically unrelated) cell series. To monitor the status of two series, two current sensors are used. A series of cells must be equivalent: they must have the same number of cells and the same capacity.
590 590  
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611 611  * Period – a period to reset of charge counters for each series (to avoid accumulation of error), second;
612 612  * Do not sum series voltages – a flag to disable the summing of series voltages.3
613 613  
614 -=== Power down ===
601 +=== 3.3.18 Power down ===
615 615  
616 616  The BMS Main 3 device can shut down itself if the battery voltage is low or the battery is idle for a long time.
617 617  
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634 634  * Power down if KEYRUN and CHARGE_ON are cleared – a flag to power down the device if KEYRUN and CHARGE_ON signals are cleared;
635 635  * Delay before setting the internal power down signal – a delay before turning off the device power when removing KEYRUN and CHARGE_ON or receiving the “Power down request” command, ms.
636 636  
637 -=== Heater ===
624 +=== 3.3.19 Heater ===
638 638  
639 639  To change the parameters of the heater control algorithm, select the "Control → Heater" section:
640 640  
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661 661  
662 662  If there is the "Heater" signal, the heater contactor closes and/or a signal is output to the corresponding digital output.
663 663  
664 -=== Cooler ===
651 +=== 3.3.20 Cooler ===
665 665  
666 666  To change the parameters of the cooler control algorithm, select the "Control → Cooler" section:
667 667  
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688 688  
689 689  If there is the "Cooler" signal, the cooler contactor closes and/or a signal is output to the corresponding digital output.
690 690  
691 -=== High voltage ===
692 692  
679 +1.
680 +11.
681 +111. High voltage
682 +
693 693  The BMS Main 3 device has an ability to measure high voltages before and after contactors.
694 694  
695 695  To change the parameters of high voltage fault, select the "Control → High voltage" section:
696 696  
697 -[[image:1733322914683-203.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="87" width="800"]]
687 +[[image:1733322914683-203.png]]
698 698  
699 699  In this section:
700 700  
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706 706  
707 707  **If there is the “High voltage fault”, the “Critical error” is generated and all contactors open.**
708 708  
709 -=== Cell analysis ===
710 710  
700 +1.
701 +11.
702 +111. Cell analysis
703 +
711 711  The battery discharge characteristic – the dependence Uocv = Uocv(DOD) – is used to determine the tabular dependence Uocv = Uocv(SOC, t°C), which is necessary for calculating the battery charge level.
712 712  
713 713  The BMS Main 3 device can automatically determine the battery discharge characteristic.
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719 719  
720 720  To configure parameters for determining the discharge characteristic of the battery, select the "Control → Cell analysis" section:
721 721  
722 -[[image:1733322914685-558.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
715 +[[image:1733322914685-558.png]]
723 723  
724 724  In this section:
725 725  
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