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Changes for page 3.3 Control

Last modified by Admin on 2026/04/30 15:56
From version 45.1
edited by Admin
on 2025/04/09 12:08
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To version 76.3
edited by Admin
on 2026/03/31 12:29
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -12,26 +12,36 @@
12 12  
13 13  In this section:
14 14  
15 -* Cell capacity – nominal capacity of cells, Ah;
16 -* Cell resistance – nominal (maximum) internal resistance of the cells, Ohm;
17 -* Relax time (after charging) – a relaxation time after charging, second;
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.
15 +* **Cell capacity** – nominal capacity of cells, Ah;
16 +* **Cell resistance** – nominal (maximum) internal resistance of the cells, Ohm;
17 +* **Connection of cells:**
18 +** **Serial **– all cells are connected in series in a single string.
19 +** **Parallel-Serial **– cells are grouped in parallel and serial items;
20 +* **Parallel-Serial: Number of Logic devices in a chain**;
21 +* **Parallel-Serial: Number of parallel chains in a block**;
22 +* **Parallel-Serial: Number of serial blocks in a string**;
23 +* **Relax time (after charging)** – a relaxation time after charging, second;
24 +* **Relax time (atfer discharging)** – a relaxation time after discharging, second;
25 +* **Reset SOC** – a command to reset cells state of charge;
26 +* **Reset resistance** – a command to reset cells resistance;
27 +* **Reset capacity** – a command to reset cells capacity;
28 +* **Method of calculating the battery voltage***:
29 +** **Summation of cell voltages** – the overall voltage is calculated as on sum of all cells in the battery;
30 +** **Using voltage before contactors** – the overall voltage is estimated as voltage before contactors measured by BMS.
23 23  
24 -The values “Capacity” and “Resistance” are used to calculate the SOC of cells and the battery.
32 +The **"Parallel-Serial"** connection works as follows: a bunch of serial connected Logics are grouped into chains. A bunch of parallel connected chains are grouped to blocks. A bunch of serial connected blocks are grouped into string. By configuring the corresponding settings it is possible to create a complex string configuration. Current through each chain will be estimated as a fraction of overall current accordingly to the number of chains in a block.
25 25  
26 -The values of “Relax time” are used to determine the state of the battery. If the battery is in a state of relaxation, the system recalculates the voltage on the cells to the state of charge of the battery.
34 +The values **“Capacity”** and **“Resistance”** are used to calculate the SOC of cells and the battery.
27 27  
28 -The “Reset parameters” will reset:
36 +The values of **“Relax time”** are used to determine the state of the battery. If the battery is in a state of relaxation, the system recalculates the voltage on the cells to the state of charge of the battery.
29 29  
38 +The** “Reset parameters”** will reset:
39 +
30 30  * state of charge (new cell SOC values will be calculated based on cell voltage and “Uocv (open-circuit voltage) table”: in the “Control → SOC estimation” section);
31 31  * cell resistance to “Cell resistance” value;
32 32  * battery capacity to “Cell capacity” value.
33 33  
34 -The “Reset parameters” command is used for starting-up and adjustment of the battery.
44 +The **“Reset parameters”** command is used for starting-up and adjustment of the battery.
35 35  
36 36  === SOC estimation ===
37 37  
... ... @@ -102,6 +102,27 @@
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  
115 +=== SOH estimation ===
116 +
117 +The BMS Main 3 device calculates the state of health of the battery (SOH) using two algorithms:
118 +
119 +* By effective capacity;
120 +* By total charge-.
121 +
122 +In "By effective capacity" mode SOH is calculated as a ratio of effective capacity to nominal capacity. Effective capacity is estimated to DOD value when battery SOC reaches 0%, so SOH is recalculated each full battery discharge.
123 +
124 +In "By total charge-" mode SOH is calculated as a linear function of "Total charge-" counter. While "Total charge-" constantly increases during battery operation, SOH will be linearly decrease at the same time. This mode requires a confirmed data about cell health depending of amount of discharge rate to configure the linear function.
125 +
126 +To configure parameters for battery state of health calculation, select the "Control → SOH correction" section:
127 +
128 +[[image:1765447975228-766.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]In this section:
129 +
130 +* Algorithm:
131 +** By effective capacity;
132 +** By total charge-;
133 +* Total charge: Charge- –  total amount of charge- for expected SOH;
134 +* Total charge: SOH –  expected SOH value at the total amount of charge-.
135 +
105 105  === 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
... ... @@ -356,13 +356,20 @@
356 356  
357 357  To change the parameters of charging process status, select the "Control → Charging status" section:
358 358  
359 -[[image:1735064935499-941.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]In this section:
390 +[[image:1771432488941-251.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="154" width="800"]]
360 360  
392 +In this section:
393 +
361 361  * Current to set the "Charging current present" – a current level to generate the "Charging current present" signal, A;
362 362  * Current to clear the "Charging current present" – a current level to clear the "Charging current present" signal, A;
363 -* Voltage to clear the “Ready to charge” – a threshold voltage level on the cell, V; if the voltage of any cell is above this level, the “Ready to charge” (hence, the “Allow charging”) signal is cleared;
364 -* Voltage to reset the “Ready to charge” – a tolerant voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” (hence, the “Allow charging”) signal is set;
396 +* Voltage to clear the “Ready to charge” – a threshold U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if the voltage of any cell is above this level, the “Ready to charge” (hence, the “Allow charging”) signal is cleared;
397 +* Voltage to reset the “Ready to charge” – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” (hence, the “Allow charging”) signal is set;
398 +* Use actual voltage to generate the "Ready to charge" signal – a flag to disable voltage correction for "Ready to charge" signal;
399 +* Treat negative currents as zero currents for generating the "Ready to charge" signal – a flag to disable voltage correction for "Ready to charge" signal at discharging current;
365 365  * Delay before recharging – a time after which the previously opened the allow charging contactor closes again, minute; to disable the operation by timeout set "Delay before recharging" to 0;
401 +* Check the 'Charge current limit' value to generate the 'Ready to charge' – a flag to enable check of "Charging current limit" to generate the "Ready to charge" signal;
402 +* Charge current limit to clear the 'Ready to charge' – a threshold charging current limit value, A; if the limit is //above //this level, the “Ready to charge” signal is cleared;
403 +* Charge current limit to set the 'Ready to charge' – a tolerant charging current limit value, A; if the limit is //below //this level, the “Ready to charge” signal is set;
366 366  * Errors 1, 2 to clear the "Ready to charge" – bitfields to choose the errors which will clear the "Ready to charge" signal.
367 367  
368 368  (% class="box infomessage" %)
... ... @@ -376,12 +376,20 @@
376 376  
377 377  To change the parameters of discharging process status, select the "Control → Discharging status" section:
378 378  
379 -[[image:1735064980481-209.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]In this section:
417 +[[image:1771431570393-551.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="155" width="800"]]
380 380  
419 +In this section:
420 +
381 381  * Current to set the "Discharging current present" – a current level to generate the "Discharging current present" signal, А;
382 382  * Current to clear the "Discharging current present" – a current level to clear the "Discharging current present" signal, А;
383 -* 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;
384 -* 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;
423 +* Voltage to clear the “Ready to discharge” – a threshold U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if the voltage of any cell is below this level, the “Ready to discharge” signal is cleared;
424 +* Voltage to reset the “Ready to discharge” – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set;
425 +* Use actual voltage to generate the "Ready to discharge" signal – a flag to disable voltage correction for "Ready to discharge" signal;
426 +* Treat positive currents as zero currents for generating the "Ready to discharge" signal – a flag to disable voltage correction for "Ready to discharge" signal at charging current;
427 +* Check the 'Discharge current limit' value to generate the 'Ready to discharge' – a flag to enable check of "Discharging current limit" to generate the "Ready to discharge" signal;
428 +* Discharge current limit to clear the 'Ready to discharge' – a threshold discharging current limit value, A; if the limit is //above //this level, the “Ready to discharge” signal is cleared;
429 +* Discharge current limit to set the 'Ready to discharge' – a tolerant discharging current limit value, A; if the limit is //below //this level, the “Ready to discharge” signal is set;
430 +* Clear the 'Ready to discharge' signal if the 'Low SOC' signal is set;
385 385  * Errors 1, 2 to clear the "Ready to discharge" – bitfields to choose the errors which will clear the "Ready to discharge" signal.
386 386  
387 387  === Precharge ===
... ... @@ -394,12 +394,14 @@
394 394  
395 395  To change the parameters of precharge contactor, select the "Control → Precharge" section:
396 396  
397 -[[image:1735065073836-743.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="160" width="800"]]
443 +[[image:1750328428183-819.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="178" width="800"]]
398 398  
399 399  * Precharge current threshold to finish precharging – a minimum current value at which precharging process assumed to be finished, A;
400 400  * Check voltages before and after contactors to finish precharging – a flag to check the voltages before and after contactors to ensure that precharge process has finished and it is allowed to close the discharging contactor;
401 401  * Minimum voltage difference to finish precharging – minimal voltage difference before and after contactors at which precharge process is meant to be finished, V;
448 +* Keep the precharging relay closed until precharge is finished – a flag to ignore the Precharge time and wait precharging to finish before open precharge relay;
402 402  * Number of precharging attempts – maximum number of precharging attempts before setting the "Precharge error";
450 +* Delay before current measurement – a delay before first current measurement after closing precharge, millisecond;
403 403  * Precharge time – a duration of closing the precharge contactor before closing the discharging contactor, millisecond;
404 404  * Relaxation between attempts – a duration between precharge attempts, millisecond;
405 405  * Check the power dissipated in the preacharge resistor - a flag to enable the calculation of power dissipated in precharge resistor;
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