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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 -
296 296  === Charge ===
297 297  
298 298  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.
... ... @@ -477,8 +477,38 @@
477 477  * Maximum voltage – maximum battery voltage, V;
478 478  * 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.
479 479  
480 -=== ===
441 +=== Main contactor ===
481 481  
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 +
482 482  === Cell balancing ===
483 483  
484 484  Balancing makes the voltage of all cells be equal to the minimum cell voltage.
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