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Changes for page 3.3 Control

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... ... @@ -229,31 +229,70 @@
229 229  
230 230  To configure parameters for determining the discharge current limit, select the "Control → Discharge map" section:
231 231  
232 -[[image:1733746766511-477.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="149" width="800"]]
232 +[[image:1740397304972-174.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="182" 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):
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;
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;
239 239  * 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.
240 240  
241 -[[image:1733746766512-300.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="195" width="800"]]
248 +Value of the discharge current limit at given SOC, temperature, contactors temperature, minimum cell voltage and maximum cell temperature is calculated as follows:
242 242  
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;
250 +**Discharge current limit = Maximum discharge current × Kds × Kdc × Kdv × Kdt**
245 245  
246 -[[image:1733746766513-161.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="183" width="800"]]
252 +=== Main contactor ===
247 247  
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.
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.
250 250  
251 -[[image:1733746766514-686.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="215" width="800"]]
256 +The Main contactor algorithm supports the following modes:
252 252  
253 -Value of the discharge current limit at given SOC, temperature, contactors temperature and minimum cell voltage is calculated as follows:
258 +* Always on;
259 +* Automatic.
254 254  
255 -Discharging current limit = Maximum discharging current × Kds × Kdc × Kdv
261 +In “Always on” mode main contactor closes if all the following is true:
256 256  
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 +
257 257  === Charge ===
258 258  
259 259  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.
... ... @@ -438,38 +438,8 @@
438 438  * Maximum voltage – maximum battery voltage, V;
439 439  * 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.
440 440  
441 -=== Main contactor ===
480 +=== ===
442 442  
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 -
473 473  === Cell balancing ===
474 474  
475 475  Balancing makes the voltage of all cells be equal to the minimum cell voltage.
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