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Changes for page 3.3 Control

Last modified by Admin on 2025/05/30 16:50
From version 12.10
edited by Admin
on 2025/02/11 16:24
Change comment: There is no comment for this version
To version 12.12
edited by Admin
on 2025/02/11 16:28
Change comment: There is no comment for this version

Summary

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... ... @@ -266,8 +266,44 @@
266 266  
267 267  The BMS Main 3X can control the charging/discharging contactor that is used to both charge and discharge the battery.
268 268  
269 -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).
269 +Charge/Discharge contactor has two algorithms of operation:
270 270  
271 +* 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;
272 +* Independent - Charge/Discharge contactor is based on its own controller.
273 +
274 +In "Dependent" mode the Charge/discharge contactor 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).
275 +
276 +The device supports the following discharging modes:
277 +
278 +1. 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.
279 +1. Discharging is allowed if all battery modules are balanced (Balanced).
280 +1. 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.
281 +
282 +The device controls two processes: **joining battery modules** and **closing the main discharging contactor** “Discharging”.
283 +
284 +
285 +The operation of the **joining battery modules** is described by the following steps:
286 +
287 +1. Battery modules are disabled. When the “Join to discharge” request is received and the voltage and current unbalance errors (Voltage unbalance (DCH), Current unbalance (DCH), Discharging current unbalance) are cleared, go to step 2.
288 +1. Checking the voltage unbalance of battery modules (the duration of the check is set in the settings). If there is no imbalance or errors are ignored (“Always on” and “Partially balanced”), go to step 3, otherwise open all discharging contactors, and go to step 1.
289 +1. Closing the precharging contactors of the battery modules (optional). Go to step 4.
290 +1. Closing the discharging contactors of the battery modules. The battery modules are self-balancing. Go to step 5.
291 +1. Checking intermodular balancing currents (the duration of the check is set in the settings). If there is no current unbalance (“Current unbalance (DCH)”) or errors are ignored (“Always on”), go to step 6, otherwise open all discharging contactors, and go to step 1.
292 +1. The battery modules are joined. If the “Join to discharge” request is cleared or "Discharging current unbalance" error occurs, go to step 1.
293 +
294 +The operation of **closing main discharging contactor** is described in the following steps:
295 +
296 +1. The main discharging contactor “Discharging” is open. When the “Discharge request” is received, the voltage and current unbalance errors (“Voltage unbalance (DCH)”, “Current unbalance (DCH)”, “Discharging current unbalance”) are cleared, and the battery modules are joined, go to step 2.
297 +1. Closing the main precharging contactor (optional). Go to step 3.
298 +1. Closing the main discharging contactor "Discharging". Go to step 4.
299 +1. The main discharging contactor “Discharging” is closed. If the "Discharge request" is cleared, the battery modules are disconnected, or errors occur, go to step 1.
300 +
301 +The command to turn on the main charging contactor "Discharging" can be issued either to the upper-level system via the CAN1 (ext) bus, or to the intelligent switch of the device, which serves for direct control of the main discharging contactor "Discharging".
302 +
303 +
304 +In addition to controlling the discharge contactors, the discharge controller calculates and transmits to the upper-level system the maximum allowable current value with which the modular battery can be 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 discharge current and regeneration current of the entire battery is performed based on the number of battery modules operating for discharge and the maximum discharge and charge current values ​​transmitted by them.
305 +
306 +
271 271  The charge/discharge contactor control is configured in the “Control → Charge/Discharge” section:
272 272  
273 273  [[image:1734089702994-738.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="92" width="600"]]