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Changes for page 3.3 Control

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229 229  
230 230  To configure parameters for determining the discharge current limit, select the "Control → Discharge map" section:
231 231  
232 -[[image:1740397304972-174.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="182" width="800"]]
232 +[[image:1733746766511-477.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="149" width="800"]]
233 233  
234 234  In this section:
235 235  
236 236  * Enable – a flag to start calculation of the discharge current limit;
237 -* Maximum discharge current – a maximum allowable value of the discharge current (under normal conditions), A;
238 -* Rate of change – a rate of change the current limit to a new value (0 is for immediate change), A/s;
239 -* Option 1: Limit discharging current by the battery SOC and temperature – a flag to enable correction of maximum allowable discharging current **Kds **depending on SOC and temperature;
237 +* Maximum discharge current – a maximum allowable value of the discharge current (under normal conditions):
238 +* Option 1: Limit discharging current by the battery SOC and temperature – a flag to enable correction of maximum allowable discharging current Kds depending on SOC and temperature;
240 240  * Option 1: SOC x Temperature x Factor – the dependence of the correction factor on SOC and battery temperature;
241 -* Option 2: Limit discharge current by the contactor temperature – a flag to enable correction of maximum allowable discharging current **Kdc** depending on contactor temperature;
242 -* Option 2: Contactor temperature x Factor – the dependence of the correction factor on SOC and contactor temperature;
243 -* Option 3: Limit discharge current by the cell voltage - a flag to enable correction of maximum allowable discharging current **Kdv** depending on minimum cell voltage;
244 -* Option 3: Cell voltage x Factor – the dependence of the correction factor on minimum cell voltage;
245 -* Option 4: Limit discharge current by the cell temperature - a flag to enable correction of maximum allowable discharging current **Kdt** depending on maximum cell temperature;
246 -* Option 4: Cell voltage x Factor – the dependence of the correction factor on minimum cell temperature.
247 247  
248 -Value of the discharge current limit at given SOC, temperature, contactors temperature, minimum cell voltage and maximum cell temperature is calculated as follows:
241 +[[image:1733746766512-300.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="195" width="800"]]
249 249  
250 -**Discharge current limit = Maximum discharge current × Kds × Kdc × Kdv × Kdt**
243 +* Option 2: Limit discharge current by the contactor temperature – a flag to enable correction of maximum allowable discharging current Kdc depending on contactor temperature;
244 +* Option 2: Contactor temperature x Factor – the dependence of the correction factor on SOC and contactor temperature;
251 251  
252 -=== Main contactor ===
246 +[[image:1733746766513-161.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="183" width="800"]]
253 253  
254 -The BMS Mini 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 a case of sealing of the charging or discharging contactors.
248 +* Option 3: Limit discharge current by the cell voltage - a flag to enable correction of maximum allowable discharging current Kdv depending on minimum cell voltage;
249 +* Option 3: Cell voltage x Factor – the dependence of the correction factor on minimum cell voltage.
255 255  
256 -The Main contactor algorithm supports the following modes:
251 +[[image:1733746766514-686.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="215" width="800"]]
257 257  
258 -* Always on;
259 -* Automatic.
253 +Value of the discharge current limit at given SOC, temperature, contactors temperature and minimum cell voltage is calculated as follows:
260 260  
261 -In “Always on” mode main contactor closes if all the following is true:
255 +Discharging current limit = Maximum discharging current × Kds × Kdc × Kdv
262 262  
263 -* Other contactors are open;
264 -* There are no errors from the "Errors 1, 2 ..." bitfileds.
265 -
266 -In “Always on” mode main contactor opens if all the following is true:
267 -
268 -* Other contactors are open;
269 -* There is an error from the the "Errors 1, 2 ..." bitfileds.
270 -
271 -In “Automatic” mode, the main contactor closes by internal algorithms at the same time with other contactors.
272 -
273 -In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
274 -
275 -(% class="box infomessage" %)
276 -(((
277 -**Note: **when errors occur in the system, the **Main **contactor opens either immediately or with the delay T,,off,, (depends on the settings described below).
278 -)))
279 -
280 -To change the parameters of the main contactor, select the "Control → Main contactor" section:
281 -
282 -[[image:1740397558976-651.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="144" width="800"]]
283 -
284 -In this section:
285 -
286 -* Enable – a flag to enable the main contactor control;
287 -* Algorithm – main contactor control algorithm:
288 -** Always on – contactor is always closed;
289 -** Automatic – contactor closes by internal charge and discharge algorithms;
290 -** On demand – contactor is closed by an external request;
291 -* Time to keep the contactor closed before closing the others – a time for other contactors to be open after the main contactor is closed;
292 -* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, s;
293 -* Keep the contactor open until the device is restarted – a flag for keeping the main contactor open until the system is reset;
294 -* Errors 1, 2 to open the main contactor – bitfields to choose the errors which will open the main contactor.
295 -
296 -=== Charging status ===
297 -
298 -To change the parameters of charging process status, select the "Control → Charging status" section:
299 -
300 -[[image:1740399071280-626.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
301 -In this section:
302 -
303 -* Current to set the "Charging current present" – a current level to generate the "Charging current present" signal, A;
304 -* Current to clear the "Charging current present" – a current level to clear the "Charging current present" signal, A;
305 -* 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;
306 -* 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;
307 -* 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;
308 -* Errors 1, 2 to clear the "Ready to charge" – bitfields to choose the errors which will clear the "Ready to charge" signal.
309 -
310 -(% class="box infomessage" %)
311 -(((
312 -**Note:** The "Allow charging" signal activates under two independent conditions:
313 -1) the voltage on the cells reaches the “Voltage to reset the “Ready to charge"” level and
314 -2) the "Delay before recharging" time has passed since the opening of the allow charging contactor.
315 -)))
316 -
317 -=== Discharging status ===
318 -
319 -To change the parameters of discharging process status, select the "Control → Discharging status" section:
320 -
321 -[[image:1740399096018-240.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
322 -In this section:
323 -
324 -* Current to set the "Discharging current present" – a current level to generate the "Discharging current present" signal, А;
325 -* Current to clear the "Discharging current present" – a current level to clear the "Discharging current present" signal, А;
326 -* 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;
327 -* 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;
328 -* Errors 1, 2 to clear the "Ready to discharge" – bitfields to choose the errors which will clear the "Ready to discharge" signal.
329 -
330 -=== Precharge ===
331 -
332 -The BMS Main 3 device can control the precharge contactor. The precharge contactor is used to charge the intermediate capacity with low current and usually placed with the limiting resistor in parallel to charging or discharging contactor.
333 -
334 -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.
335 -
336 -[[image:1740399150173-761.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="155" width="800"]]
337 -
338 -To change the parameters of precharge contactor, select the "Control → Precharge" section:
339 -
340 -* Precharge current threshold to finish precharging – a minimum current value at which precharging process assumed to be finished, A;
341 -* Minimum voltage difference to finish precharging – minimal voltage difference before and after contactors at which precharge process is meant to be finished, V;
342 -* Number of precharging attempts – maximum number of precharging attempts before setting the "Precharge error";
343 -* Precharge time – a duration of closing the precharge contactor before closing the discharging contactor, millisecond;
344 -* Relaxation between attempts – a duration between precharge attempts, millisecond;
345 -* Check the power dissipated in the preacharge resistor - a flag to enable the calculation of power dissipated in precharge resistor;
346 -* Precharge resistor resistance, Ohm;
347 -* Maximum allowable power dissipated in the resistor, W;
348 -* Delay before setting the "Precharge error" when checking power, millisecond;
349 -* Delay before clearing the "Precharge error", second;
350 -* Lock the "Precharge error" – a flag to block the error until the device is restarted.
351 -
352 -“Precharge error” generation conditions if any of the following is true:
353 -
354 -* the precharge current does not decrease during the "Precharge time" after "Number of precharging attempts";
355 -* voltages before and after contactors are not equal during the "Precharge time" after "Number of precharging attempts";
356 -* power dissipated on the precharge resistor is above the maximum value during the “Delay before setting the 'Precharge error' when checking power” time.
357 -
358 -(% class="box warningmessage" %)
359 -(((
360 -Behavior of contactors at “Precharge error” is configured in corresponding contactor settings!
361 -)))
362 -
363 363  === Charge ===
364 364  
365 365  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.
... ... @@ -544,8 +544,38 @@
544 544  * Maximum voltage – maximum battery voltage, V;
545 545  * 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.
546 546  
547 -=== ===
441 +=== Main contactor ===
548 548  
443 +The BMS Mini 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 a case of sealing of the charging or discharging contactors.
444 +
445 +The main contactor closes if there are no errors from the list below:
446 +
447 +* Overcurrent;
448 +* Undervoltage;
449 +* Overvoltage;
450 +* High temperature (CH);
451 +* High temperature (DCH);
452 +* Unallowable charging;
453 +* Critical error.
454 +
455 +The main contactor opens if the charging and discharging contactors are opened and any of the following conditions is met:
456 +
457 +* charging or discharging current is detected during a set time;
458 +* voltage of any cell is lower than the minimum cell voltage configured in the section "Protections → Undervoltage" during a set time;
459 +* voltage of any cell is greater than the maximum cell voltage configured in the section "Protections → Overvoltage" during a set time;
460 +* temperature of any cell is greater than the maximum cell temperature configured in the section "Protections → High temperature" during a set time;
461 +* Critical error stays on during a set time.
462 +
463 +To change the parameters of the main contactor, select the "Control → Main contactor" section:
464 +
465 +[[image:1733746797002-498.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="93" width="800"]]
466 +
467 +In this section:
468 +
469 +* Enable – a flag to enable the main contactor control;
470 +* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, second;
471 +* Keep the contactor open until the device is restarted – a flag for keeping the main contactor opened until the system be reset.
472 +
549 549  === Cell balancing ===
550 550  
551 551  Balancing makes the voltage of all cells be equal to the minimum cell voltage.
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