Changes for page 3.3 Control

Last modified by Admin on 2025/05/30 16:50

From 12.11 to 12.12 From 14.1 to 15.1

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  Charge/Discharge contactor has two algorithms of operation:
--* 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;
++* 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;
  * Independent - Charge/Discharge contactor is based on its own controller.
--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).
++The charging/discharging controller supports the following modes:
--The device supports the following discharging modes:
++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.
++1. Charging/Discharging is allowed if all battery modules are balanced (Balanced).
++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.
--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.
--1. Discharging is allowed if all battery modules are balanced (Balanced).
--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.
++The device controls two processes: **joining battery modules** and **closing the main charging/discharging contactor**.
--The device controls two processes: **joining battery modules** and **closing the main discharging contactor** “Discharging”.
++The operation of the **joining battery modules** depends on the signal received:
++* If "Join to charge" is received, joining procedure is done as described in [[Charge>>doc:||anchor="HCharge"]] section;
++* If "Join to discharge" is received, joining procedure is done as described in [[Discharge>>doc:||anchor="HDischarge"]] section;
++* If both signals received, "Join to charge" has a priority.
--The operation of the **joining battery modules** is described by the following steps:
++The operation of **closing main charging/discharging contactor **depends on the signal received:
--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.
--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.
--1. Closing the precharging contactors of the battery modules (optional). Go to step 4.
--1. Closing the discharging contactors of the battery modules. The battery modules are self-balancing. Go to step 5.
--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.
--1. The battery modules are joined. If the “Join to discharge” request is cleared or "Discharging current unbalance" error occurs, go to step 1.
++* If "Charge request" is received, procedure is done as described in [[Charge>>doc:||anchor="HCharge"]] section;
++* If "Discharge request" is received, procedure is done as described in [[Discharge>>doc:||anchor="HDischarge"]] section;
++* If both signals received, "Charge request" has a priority.
--The operation of **closing main discharging contactor** is described in the following steps:
--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.
--1. Closing the main precharging contactor (optional). Go to step 3.
--1. Closing the main discharging contactor "Discharging". Go to step 4.
--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.
++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:
--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".
++* "Charge current limit" and "Regeneration current limit" are calculated only if there is "Charge request";
++* "Discharge current limit" is calculated only if there is "Discharge request".
--
--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.
--
--
  The charge/discharge contactor control is configured in the “Control → Charge/Discharge” section:
--[[image:1734089702994-738.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="92" width="600"]]
++[[image:1739292809635-913.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="238" width="800"]]
  In this section:
--* Enable – a flag to enable the charge/discharge controller.
++* Enable – a flag to enable battery charge/discharge controller;
++* Algorithm:
++** Always on – discharging is always allowed;
++** Balanced – discharging is allowed provided that all battery modules are balanced;
++** Partially balanced – discharging is allowed for most balanced battery modules;
++* Minimum number of modules allowed to join – a minimum number of battery modules that can be connected in parallel;
++* Allowable battery current to rejoin modules – a battery current at which joining of battery modules is permitted, A;
++* 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;
++* Checking voltages time – a time of checking voltages of battery modules before starting joining modules, millisecond;
++* Balancing modules time – a time of balancing battery modules after joining modules and before closing main discharging contactor, millisecond;
++* Control the precharging contactor – a flag to control the main precharging contactor;
++* Canceling discharging time – a delay before opening the main discharging contactor, millisecond;
++* Disconnect modules that are not ready to charge – a flag for disconnecting modules that have the “Ready to charge” signal cleared;
++* Disconnect modules that are not ready to discharge – a flag for disconnecting modules that have the “Ready to discharge” signal cleared;
++* Join modules on the “Charge request” signal – a flag to enable automatic modules joining if “Charge request” signal appears;
++* Join modules on the “Discharge request” signal – a flag to enable automatic modules joining if “Discharge request” signal appears;
++* Maximum CONTINUOUS charge current limit – a maximum allowed continuous charging current of all the battery, A;
++* Maximum charge current limit – a maximum allowed charging current of all the battery, A;
++* Maximum CONTINUOUS discharge current limit – a maximum allowed continuous discharging current of all the battery, A;
++* Maximum discharge current limit – a maximum allowed discharging current of all the battery, A;
++* Errors 1 (2) to disconnect all battery modules – errors that cause all battery modules to be disconnected from the common bus;
++* Errors 1 (2) to open the charging/discharging contactor – errors that cause the main charging/discharging contactor "Discharging" to open,
++* Switch of the charging/discharging contactor on errors without a delay – a flag that allows the main charging/discharging contactor to be opened without delay if errors are detected.
  === Module balancing ===

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