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Changes for page 3.5 Battery control

Last modified by Admin on 2025/03/10 12:50
From version 5.2
edited by Admin
on 2024/11/21 17:11
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To version 7.2
edited by Admin
on 2024/11/21 17:54
Change comment: There is no comment for this version

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169 169  In this section:
170 170  
171 171  * Enable – a flag to enable Charging/Discharging contactor controller.
172 +
173 +== 3.5.5 Main contactor ==
174 +
175 +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.
176 +
177 +The main contactor closes if there are no errors from the list below:
178 +
179 +* Overcurrent;
180 +* Undervoltage;
181 +* Overvoltage;
182 +* High temperature (charging);
183 +* High temperature (discharging);
184 +* Unallowable charging;
185 +* Critical error.
186 +
187 +The main contactor opens if the charging and discharging relays are opened and any of the following conditions is met:
188 +
189 +* charging or discharging current is detected during a set time;
190 +* voltage of any cell is lower than the minimum cell voltage configured in the section "Protections → Undervoltage protection" during a set time;
191 +* voltage of any cell is greater than the maximum cell voltage configured in the section "Protections → Overvoltage protection" during a set time;
192 +* temperature of any cell is greater than the maximum cell temperature configured in the section "Protections → High temperature protection" during a set time;
193 +* Critical error stays on during a set time.
194 +
195 +To change the parameters of the main contactor, select the menu "Cells → Main contactor":
196 +
197 +[[Main contactor settings>>image:1732209137414-912.png||data-xwiki-image-style-alignment="center" height="132" width="352"]]
198 +
199 +
200 +In this section:
201 +
202 +* Enable – a flag to enable the main contactor control;
203 +* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, second;
204 +* Keep the contactor open until the device is reset – a flag for keeping the main contactor opened until the system be reset.
205 +
206 +== 3.5.6 Power down control ==
207 +
208 +The BMS Main 2.x can command the BMS Power Control board to shut down the battery system if the battery voltage is low or the battery is idle for a long time. The BMS Main 2.x interacts with the BMS Power Control using the “Power down request” and the “Acknowledgement of power down” discrete signals.
209 +
210 +Shutting down the battery system is performed according to the following conditions:
211 +
212 +* the battery voltage is below the minimum level;
213 +* the “Charger connected” signal is cleared for 60 seconds.
214 +
215 +The BMS Main 2.x also shuts down the battery if it stays in the “Charging OFF”, “Discharging OFF”, “Relaxed (after charging)” or “Relaxed (after discharging)” for the set time.
216 +
217 +To change the parameters of the power down control, select the menu "Cells → Power down control":
218 +
219 +[[Power down >>image:1732211675123-235.png||data-xwiki-image-style-alignment="center" height="198" width="402"]]
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