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Changes for page 3.5 Battery control

Last modified by Admin on 2025/03/10 12:50
From version 18.1
edited by Admin
on 2025/02/19 09:55
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To version 14.1
edited by Admin
on 2025/01/30 12:42
Change comment: There is no comment for this version

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4 4  (% data-numbered-headings-start="5" style="--numbered-headings-start: 4;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
5 5  == Battery control ==
6 6  
7 -=== Charge control ===
7 +=== Charging control ===
8 8  
9 9  There are two relays that serve charging the battery: a charging relay and an allow charging relay. With the help of the allow charging relay, the BMS commands the charger to start or stop charging.
10 10  
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62 62  * Use specific delays before stopping charging (on errors) – a flag to enable manual settings of time delays T,,off,, for specific errors;
63 63  * Switch off the charging relay on errors without delay – a flag to protectively open the charging relay without delay. In the opposite case, when an error is detected, the charging relay opens always with the delay “Delay before stopping charging”;
64 64  * Control the precharging relay – a flag that allows control of the precharging relay;
65 -* Voltage to clear the “Ready to charge” (hence, the “Allow charging”) signal – a threshold U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if the voltage of any cell is above this level, the “Ready to charge” signal is cleared;
66 -* Voltage to reset the “Ready to charge” (hence, the “Allow charging”) signal – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” signal is set;
65 +* Voltage to clear the “Ready to charge” (hence, the “Allow charging”) signal – a threshold voltage level on the cell, V; if the voltage of any cell is above this level, the “Ready to charge” signal is cleared;
66 +* Voltage to reset the “Ready to charge” (hence, the “Allow charging”) signal – a tolerant voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” signal is set;
67 67  * Delay before recharging – a time after which the previously opened the allow charging relay closes again, minute; to disable the operation by timeout set "Delay before recharging" to 0.
68 68  
69 69  (% class="box infomessage" %)
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73 73  2) the "Delay before recharging" time has passed since the opening of the allow charging relay.
74 74  )))
75 75  
76 -=== Discharge control ===
76 +=== Discharging control ===
77 77  
78 78  The board has a discharging relay to connect battery to the load.
79 79  
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133 133  * Switch off the discharging relay on errors without delay – a flag to protectively open the discharging relay without delay. In the opposite case, when an error is detected, the discharging relay opens always with the delay “Delay before stopping discharging”.
134 134  * Precharge time – a duration of closing the precharge relay before closing the discharging relay, millisecond;
135 135  * Precharge current threshold to start discharging – a minimum current value to finish precharging and start discharge, A;
136 -* Voltage to clear the “Ready to discharge” signal – a threshold U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if the voltage of any cell is below this level, the “Ready to discharge” signal is cleared;
137 -* Voltage to reset the “Ready to discharge” signal – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set.
136 +* Voltage to clear the “Ready to discharge” signal – a threshold voltage level on the cell, V; if the voltage of any cell is below this level, the “Ready to discharge” signal is cleared;
137 +* Voltage to reset the “Ready to discharge” signal – a tolerant voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set.
138 138  
139 139  === Discharging (AUX) control ===
140 140  
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182 182  
183 183  The BMS Main 2.x has a relay to control 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 contactor.
184 184  
185 -The Main contactor algorithm supports the following modes:
185 +The main contactor closes if there are no errors from the list below:
186 186  
187 -* Always on;
188 -* Automatic;
189 -* On demand.
187 +* Overcurrent;
188 +* Undervoltage;
189 +* Overvoltage;
190 +* High temperature (charging);
191 +* High temperature (discharging);
192 +* Unallowable charging;
193 +* Critical error.
190 190  
191 -In “Always on” mode main contactor closes if all the following is true:
195 +The main contactor opens if the charging and discharging relays are opened and any of the following conditions is met:
192 192  
193 -* Other contactors are open;
194 -* There are no errors from the list below:
195 -** Overcurrent;
196 -** Undervoltage;
197 -** Overvoltage;
198 -** High temperature (charging);
199 -** High temperature (discharging);
200 -** Unallowable charging;
201 -** Critical error.
197 +* charging or discharging current is detected during a set time;
198 +* voltage of any cell is lower than the minimum cell voltage configured in the section "Protections → Undervoltage protection" during a set time;
199 +* voltage of any cell is greater than the maximum cell voltage configured in the section "Protections → Overvoltage protection" during a set time;
200 +* temperature of any cell is greater than the maximum cell temperature configured in the section "Protections → High temperature protection" during a set time;
201 +* Critical error stays on during a set time.
202 202  
203 -In “Always on” mode main contactor opens if all the following is true:
204 -
205 -* Other contactors are open;
206 -* There is an error from the the list above.
207 -
208 -In “Automatic” mode, the main contactor closes by internal algorithms at the same time with other contactors.
209 -
210 -In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
211 -
212 212  To change the parameters of the main contactor, select the menu "Cells → Main contactor":
213 213  
214 -[[image:1739958553206-813.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="179" width="410"]]
205 +[[image:1732209137414-912.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="132" width="352"]]
215 215  
216 216  In this section:
217 217  
218 218  * Enable – a flag to enable the main contactor control;
219 -* Algorithm – main contactor control algorithm:
220 -** Always on – contactor is always closed;
221 -** Automatic – contactor closes by internal charge and discharge algorithms;
222 -** On demand – contactor is closed by an external request;
223 223  * Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, second;
224 224  * Keep the contactor open until the device is reset – a flag for keeping the main contactor opened until the system be reset.
225 225  
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