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Changes for page 3.5 Battery control

Last modified by Admin on 2025/03/10 12:50
From version 11.2
edited by Admin
on 2024/12/11 11:21
Change comment: Update document after refactoring.
To version 18.1
edited by Admin
on 2025/02/19 09:55
Change comment: There is no comment for this version

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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 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;
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;
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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132 132  * Use specific delays before stopping discharging (on errors) – a flag to enable manual settings of time delays T,,off,, for specific errors;
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 -* 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;
136 -* 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.
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.
137 137  
138 138  === Discharging (AUX) control ===
139 139  
... ... @@ -154,12 +154,15 @@
154 154  In this section:
155 155  
156 156  * Enable – a flag to activate the auxiliary discharge control;
157 -* Switch off the discharging (AUX) relay at low SOC:
158 +* Switch off the discharging (AUX) relay at when the battery SOC is low:
158 158  ** Minimum SOC – a minimum SOC value, when reached, the auxiliary (AUX) discharging relay opens, %;
159 159  ** Tolerant SOC – a permissive SOC value, upon reaching which the auxiliary (AUX) discharging relay re-closes, %;
161 +* Switch off the discharging (AUX) relay when the cell voltage is low:
162 +** Minimum cell voltage – a minimum cell voltage, when reached, the auxiliary (AUX) discharging relay opens, %;
163 +** Tolerant cell voltage – a permissive cell voltage, upon reaching which the auxiliary (AUX) discharging relay re-closes, %;
160 160  * Switch off the discharging (AUX) relay if the battery voltage is out of the range:
161 -** Minimum voltage – minimum battery voltage, V;
162 -** Maximum voltage – maximum battery voltage, V;
165 +** Minimum battery voltage – minimum battery voltage, V;
166 +** Maximum battery voltage – maximum battery voltage, V;
163 163  * Switch off the discharging (AUX) relay on errors – the auxiliary (AUX) discharging relay opens if the following errors occur: Undervoltage, Overcurrent, High temperature (discharging), Short circuit, Critical error.
164 164  
165 165  === Charging/Discharging control ===
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178 178  
179 179  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.
180 180  
181 -The main contactor closes if there are no errors from the list below:
185 +The Main contactor algorithm supports the following modes:
182 182  
183 -* Overcurrent;
184 -* Undervoltage;
185 -* Overvoltage;
186 -* High temperature (charging);
187 -* High temperature (discharging);
188 -* Unallowable charging;
189 -* Critical error.
187 +* Always on;
188 +* Automatic;
189 +* On demand.
190 190  
191 -The main contactor opens if the charging and discharging relays are opened and any of the following conditions is met:
191 +In “Always on” mode main contactor closes if all the following is true:
192 192  
193 -* charging or discharging current is detected during a set time;
194 -* voltage of any cell is lower than the minimum cell voltage configured in the section "Protections → Undervoltage protection" during a set time;
195 -* voltage of any cell is greater than the maximum cell voltage configured in the section "Protections → Overvoltage protection" during a set time;
196 -* temperature of any cell is greater than the maximum cell temperature configured in the section "Protections → High temperature protection" during a set time;
197 -* Critical error stays on during a set time.
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.
198 198  
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 +
199 199  To change the parameters of the main contactor, select the menu "Cells → Main contactor":
200 200  
201 -[[image:1732209137414-912.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="132" width="352"]]
214 +[[image:1739958553206-813.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="179" width="410"]]
202 202  
203 203  In this section:
204 204  
205 205  * 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;
206 206  * Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, second;
207 207  * Keep the contactor open until the device is reset – a flag for keeping the main contactor opened until the system be reset.
208 208  
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