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Changes for page 3.3 Control

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Summary

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... ... @@ -12,35 +12,37 @@
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 cell, Ohm;
17 -* Relax time (after charging) – a relaxation time after charging, second;
18 -* Relax time (atfer discharging) – the relaxation time after discharging, second;
19 -* Reset parameters– a command to reset cells state of charge, capacity, and resistance.
15 +* **Cell capacity** – nominal capacity of cells, Ah;
16 +* **Cell resistance** – nominal (maximum) internal resistance of the cell, Ohm;
17 +* **Relax time (after charging)** – a relaxation time after charging, second;
18 +* **Relax time (after discharging)** – the relaxation time after discharging, second;
19 +* **Reset parameters **– a command to reset cells state of charge, capacity, and resistance.
20 20  
21 -The values “Capacity” and “Resistance” are used to calculate the SOC of cells and the battery.
21 +The values “**Capacity**” and “**Resistance**” are used to calculate the SOC of cells and the battery.
22 22  
23 -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.
23 +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.
24 24  
25 -The “Reset parameters” will reset:
25 +The “**Reset parameters**”  is used for starting-up and adjustment of the battery and will reset:
26 26  
27 27  * 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);
28 28  * cell resistance to “Cell resistance” value;
29 29  * battery capacity to “Cell capacity” value.
30 30  
31 -The “Reset parameters” command is used for starting-up and adjustment of the battery.
32 -
33 33  === SOC estimation ===
34 34  
35 -The BMS Mini device calculates the state of charge of the battery (SOC) using two algorithms:
33 +The BMS Mini device calculates the state of charge (SOC) of each cell by using following algorithms:
36 36  
37 -* by open circuit voltage;
38 -* by voltage and current.
35 +The **“Voltage”** SOC calculation algorithm calculates cells SOC based on the tabular dependence Uocv = Uocv(SOC, t °C).
39 39  
40 -It is recommended to use the algorithm of calculation of SOC by voltage and current.
37 +The **“Current and voltage (simplified)”** SOC calculation algorithm works as follows:
41 41  
42 -To change the estimation algorithm for calculating the battery SOC, select the "Control → SOC estimation → Algorithm" section:
39 +* if I = 0, the battery is in the state of relaxation and the cell voltage Uocv is outside the [U,,ocv[point 1],,; U,,ocv[point 2],,], the SOC calculation is based on the tabular dependency Uocv = Uocv(SOC, t °C);
40 +* in any other cases, the SOC value is proportional to the charge (coulomb) passed through the battery (current time integral).
43 43  
42 +The **“Current and voltage (enhanced)” **SOC calculation algorithm differs from the simplified algorithm by online correction of the effective capacity. When using this algorithm, it is necessary to fine tune the tabular dependence Uocv = Uocv (SOC, t °C).
43 +
44 +To change the algorithm for calculating the SOC, select the "Control → SOC estimation" section:
45 +
44 44  [[image:1733746733477-590.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="166" width="800"]]
45 45  
46 46  The following estimation algorithms supported:
... ... @@ -62,25 +62,27 @@
62 62  
63 63  [[image:1733746733478-414.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="167" width="800"]]
64 64  
65 -The following battery Final SOC calculation methods are supported:
67 +In this section:
66 66  
67 -* Minimal SOC – SOC of the modular battery is assumed to be the minimum SOC among the battery modules;
68 -* Average SOC – SOC of the modular battery is taken equal to the arithmetic average of the SOC of the battery modules;
69 -* 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 has 100% SOC, b) 0% if any cell has 0% SOC;
70 -* 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.
69 +* **Algorithm:**
70 +** **Voltage **– by open circuit voltage;
71 +** **Current and voltage (simplified)** – recommended for LFP cells;
72 +** **Current and voltage (enhanced)** – recommended for NMC cells:
73 +* **Final SOC** – method of calculating overall SOC of battery:
74 +** **Minimal SOC** – the battery SOC is assumed to be the minimum SOC among the cells;
75 +** **Average SOC** – the battery SOC is taken equal to the arithmetic average of the cell SOC;
76 +** **Min-Max SOC** – the battery SOC is calculated based on the minimum and maximum SOC of the cells (recommended). Final SOC will be a) 100% if __any cell__ has 100% SOC, b) 0% if __any cell__ has 0% SOC;
77 +** **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.
78 +* **Scale the final SOC** – a flag to scale the battery SOC by the following values;
79 +* **SOC corresponding to 0%** – the battery SOC that sets to be 0%;
80 +* **SOC corresponding to 100%** – the battery SOC that sets to be 100%.
81 +* **Uocv (open-circuit voltage) table** – the dependence of the cell open circuit voltage Uocv on SOC and the cell temperature (selected for specific batteries);
82 +* **Linear zone** - linear zone of the Uocv = Uocv(SOC, t°C) dependency, inside which the cell voltage changes insignificantly:
83 +** **Linear zone: point 1** – starting point of the Uocv linear zone;
84 +** **Linear zone: point 2** – ending point of the Uocv linear zone;
85 +* **Coulomb counting correction (temperature)** – the dependence of battery capacity on temperature;
86 +* **Coulomb counting correction (cycles)** – the dependence of battery capacity on the number of charge-discharge cycles.
71 71  
72 -Other parameters:
73 -
74 -* Scale the final SOC – a flag to scale the battery SOC by the following values;
75 -* SOC corresponding to 0% – the battery SOC that sets to be 0%;
76 -* SOC corresponding to 100% – the battery SOC that sets to be 100%.
77 -* Uocv (open-circuit voltage) table – the dependence of the cell open circuit voltage Uocv on SOC and the cell temperature (selected for specific batteries);
78 -* Linear zone - linear zone of the Uocv = Uocv(SOC, t°C) dependency, inside which the cell voltage changes insignificantly:
79 -** Linear zone: point 1 – starting point of the Uocv linear zone;
80 -** Linear zone: point 2 – ending point of the Uocv linear zone;
81 -* Coulomb counting correction (temperature) – the dependence of battery capacity on temperature;
82 -* Coulomb counting correction (cycles) – the dependence of battery capacity on the number of charge-discharge cycles.
83 -
84 84  === SOC correction ===
85 85  
86 86  The BMS Mini 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"]]).
... ... @@ -297,7 +297,7 @@
297 297  
298 298  To change the parameters of charging process status, select the "Control → Charging status" section:
299 299  
300 -[[image:1754931617275-503.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="135" width="800"]]
304 +[[image:1762774819522-147.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="140" width="800"]]
301 301  In this section:
302 302  
303 303  * Current to set the "Charging current present" – a current level to generate the "Charging current present" signal, A;
... ... @@ -307,6 +307,9 @@
307 307  * 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;
308 308  * 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;
309 309  * 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;
314 +* 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;
315 +* 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;
316 +* 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;
310 310  * Errors 1, 2 to clear the "Ready to charge" – bitfields to choose the errors which will clear the "Ready to charge" signal.
311 311  
312 312  (% class="box infomessage" %)
... ... @@ -320,13 +320,18 @@
320 320  
321 321  To change the parameters of discharging process status, select the "Control → Discharging status" section:
322 322  
323 -[[image:1754931699901-802.png]]
324 -In this section:
330 +[[image:1762774840204-111.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="146" width="800"]]In this section:
325 325  
326 326  * Current to set the "Discharging current present" – a current level to generate the "Discharging current present" signal, А;
327 327  * Current to clear the "Discharging current present" – a current level to clear the "Discharging current present" signal, А;
334 +* Use actual voltage to generate the "Ready to discharge" signal – a flag to disable voltage correction for "Ready to discharge" signal;
335 +* Use actual voltage to generate the "Ready to discharge" signal if the current is positive – a flag to disable voltage correction for "Ready to discharge" signal only at charging current;
328 328  * 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;
329 329  * 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;
338 +* 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;
339 +* 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;
340 +* 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;
341 +* Clear the 'Ready to discharge' signal if the 'Low SOC' signal is set;
330 330  * Errors 1, 2 to clear the "Ready to discharge" – bitfields to choose the errors which will clear the "Ready to discharge" signal.
331 331  
332 332  === Precharge ===
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335 335  
336 336  BMS Main 3 device detects errors while pre-charging the load capacity by monitoring the current and voltage difference before and after contactors. Also BMS can measure the power dissipated on precharge resistor and generate an error if it greater than configured limit.
337 337  
338 -[[image:1740399150173-761.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="155" width="800"]]
339 -
340 340  To change the parameters of precharge contactor, select the "Control → Precharge" section:
341 341  
352 +[[image:1754931813173-804.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="172" width="800"]]
353 +
354 +In this section:
355 +
342 342  * Precharge current threshold to finish precharging – a minimum current value at which precharging process assumed to be finished, A;
357 +* 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;
343 343  * Number of precharging attempts – maximum number of precharging attempts before setting the "Precharge error";
359 +* Delay before current measurement – a delay before first current measurement after closing precharge, millisecond;
344 344  * Precharge time – a duration of closing the precharge contactor before closing the discharging contactor, millisecond;
345 345  * Relaxation between attempts – a duration between precharge attempts, millisecond;
346 346  * Check the power dissipated in the preacharge resistor - a flag to enable the calculation of power dissipated in precharge resistor;
... ... @@ -611,13 +611,13 @@
611 611  
612 612  To change the parameters of the heater control algorithm, select the "Control → Heater" section:
613 613  
614 -
615 -[[image:1740404973346-344.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
630 +[[image:1777293968000-235.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="141" width="800"]]
616 616  In this section:
617 617  
618 618  * Enable – a flag to enable heater control;
619 619  * Minimum cell temperature, °C;
620 620  * Tolerant cell temperature, °C;
636 +* Start the heater only if "Charger connected" signal is set;
621 621  * Delay before starting the heater, millisecond;
622 622  * Delay before stopping the heater, millisecond;
623 623  * Errors 1, 2 to turn off the heater – bitfields to choose the errors which will turn off the heater.
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