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Changes for page 3.3 Control

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231 231  
232 232  The battery discharge management is configured in the "Control - Discharge" section:
233 233  
234 +[[image:1740750247231-926.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="218" width="800"]]
234 234  
235 235  In this section:
236 236  
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239 239  ** Always on – discharging is always allowed;
240 240  ** Balanced – discharging is allowed provided that all battery modules are balanced;
241 241  ** Partially balanced – discharging is allowed for most balanced battery modules;
242 -* Current corresponding to discharging – a current level to set the "Discharging current present" signal, A;
243 -* Current corresponding to no discharging – a current level to clear the "Discharging current present" signal, A;
244 -* Maximum current to rejoin modules – a maximum allowable current at which rejoining of battery modules is allowed, A;
245 -* Checking voltages time – a time of checking voltages of battery modules, ms;
246 -* Pre-balancing modules time – a time of precharging battery modules, ms;
247 -* Balancing modules time – a time of balancing battery modules, ms;
248 -* Control the precharging relay – a flag to control the main precharging contactor;
249 -* Precharging time – a time of precharging, ms;
250 -* Cancel discharging without a delay;
251 -* Canceling discharging time – a delay before opening the main discharging contactor, ms;
252 -* Limit module current – a flag that allows to limit the discharging current of a modular battery so that the current of each battery module does not exceed its maximum allowable discharge current;
253 -* Slew rate – a rate of change of the discharge current limit when the “Limit module current” flag is set, А/s;
254 -* Disconnect modules not ready to discharge – a flag for disconnecting modules that have the “Ready to discharge” signal cleared.
243 +* Minimum number of modules allowed to join – a minimum number of battery modules that can be connected in parallel;
244 +* Allowable battery current to rejoin modules – a battery current at which joining of battery modules is permitted, A;
245 +* Allowable voltage difference to rejoin modules – a difference between the voltage of the disconnected module and the battery voltage at which its joining is permitted, V;
246 +* Checking voltages time – a time of checking voltages of battery modules before starting joining modules, millisecond;
247 +* Balancing modules time – a time of balancing battery modules after joining modules and before closing main discharging contactor, millisecond;
248 +* Control the precharging contactor – a flag to control the main precharging contactor;
249 +* Canceling discharging time – a delay before opening the main discharging contactor, millisecond;
250 +* Disconnect modules that are not ready to discharge – a flag for disconnecting modules that have the “Ready to discharge” signal cleared.
251 +* Disconnect all modules if one is not ready to discharge – a flag for disconnecting all modules if one of the modules have the “Ready to discharge” signal cleared;
252 +* Join modules on the “Discharge request” signal – a flag to enable automatic modules joining if “Discharge request” signal appears;
253 +* Maximum discharge current limit – a maximum allowed discharging current of all the battery, A;
254 +* Errors to disconnect all battery modules – errors that cause all battery modules to be disconnected from the common bus;
255 +* Errors to open the discharging contactor – errors that cause the main discharging contactor "Discharging" to open,
256 +* Switch of the discharging contactor on errors without a delay – a flag that allows the main discharging contactor “Discharging” to be opened without delay if errors are detected.
255 255  
256 256  === Charge/Discharge ===
257 257  
258 258  The BMS Main X can control the charging/discharging contactor that is used to both charge and discharge the battery.
259 259  
260 -The charge/discharge contactor (“Charging/Discharging” signal) receives a “Charging” signal (generated by the charge controller) if a “Charge request” signal is received from the upper-level system. In all other cases, the "Discharging" signal is output to the contactor (generated by the discharge controller).
262 +Charge/Discharge contactor has two algorithms of operation:
261 261  
262 -The charge/discharge contactor control is configured in the “Control – Charge/Discharge” section:
264 +* Dependent - Charge/Discharge contactor depends on Charge and Discharge algorithms and their signals and behaves as Charging contactor if "Charging" signal is set, otherwise – as Discharging contactor;
265 +* Independent - Charge/Discharge contactor is based on its own controller.
263 263  
267 +(% class="box warningmessage" %)
268 +(((
269 +**Warning!**
270 +Charge/Discharge algorithms on BMS Main X and on battery modules controllers must **be the same**!
271 +)))
272 +
273 +The charging/discharging controller supports the following modes:
274 +
275 +1. Charging/Discharging is always allowed (Always on) – the device ignores voltage and current unbalance of the battery modules and commands to close the discharging contactors of the battery modules and the main discharging contactor.
276 +1. Charging/Discharging is allowed if all battery modules are balanced (Balanced).
277 +1. Charging/Discharging is allowed for most balanced battery modules (Partially balanced). Unbalanced modules are disconnected from the common bus and do not participate in the discharging.
278 +
279 +The device controls two processes: **joining battery modules** and **closing the main charging/discharging contactor**.
280 +
281 +The operation of the **joining battery modules** depends on the signal received:
282 +
283 +* If "Join to charge" is received, joining procedure is done as described in [[Charge>>https://docs.movicomelectric.com/bin/view/Battery%20management%20systems/BMS%20Main%203X/3.%20Configuration/3.3%20Control/#HCharge||anchor="HCharge"]] section;
284 +* If "Join to discharge" is received, joining procedure is done as described in [[Discharge>>doc:||anchor="HDischarge"]] section;
285 +* If both signals received, "Join to charge" has a priority.
286 +
287 +The operation of **closing main charging/discharging contactor **depends on the signal received:
288 +
289 +* If "Charge request" is received, procedure is done as described in [[Charge>>url:https://docs.movicomelectric.com/bin/view/Battery%20management%20systems/BMS%20Main%203X/3.%20Configuration/3.3%20Control/#HCharge]] section;
290 +* If "Discharge request" is received, procedure is done as described in [[Discharge>>url:https://docs.movicomelectric.com/bin/view/Battery%20management%20systems/BMS%20Main%203X/3.%20Configuration/3.3%20Control/#HDischarge]] section;
291 +* If both signals received, "Charge request" has a priority.
292 +
293 +In addition, the charge/discharge controller calculates and transmits to the upper-level system the maximum allowable current value with which the modular battery can be charged ("Charge current limit") and discharged ("Discharge current limit"), as well as the maximum regeneration current value with which the modular battery can be charged during operation under load ("Regeneration current limit"). The calculation of the charge, discharge and regeneration currents of the entire battery is performed based on the number of battery modules operating for charge or discharge and the maximum charge and discharge current values ​​transmitted by them:
294 +
295 +* "Charge current limit" and "Regeneration current limit" are calculated only if there is "Charge request";
296 +* "Discharge current limit" is calculated only if there is "Discharge request".
297 +
298 +The charge/discharge contactor control is configured in the “Control → Charge/Discharge” section:
299 +
300 +
264 264  [[image:1734356572312-596.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="58" width="600"]]
265 265  
266 266  In this section:
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