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Changes for page 3.5 Battery control

Last modified by Admin on 2025/03/10 12:50
From version 6.2
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on 2024/11/21 17:12
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To version 4.1
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130 130  * 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;
131 131  * 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.
132 132  
133 -== 3.5.3 Discharging (AUX) control ==
134 -
135 -The BMS Main 2.x board can control the power supply of external equipment using the auxiliary (AUX) discharging relay. An example of external equipment can be an inverter that converts DC to AC to power a service laptop and other devices.
136 -
137 -The power supply circuit of the external equipment using the auxiliary (AUX) discharging relay is independent of the battery load circuit. The closing and opening of the auxiliary (AUX) discharging relay is performed according to its program.
138 -
139 -If the power supply function of the external equipment is enabled, the auxiliary (AUX) discharging relay closes. The opening of this relay occurs on three independent conditions:
140 -
141 -* the battery has low SOC;
142 -* the battery voltage is out of range;
143 -* the battery system errors are detected.
144 -
145 -To change the parameters of the powering of external equipment, select the menu "Cells → Discharging (AUX) control":
146 -
147 -[[Discharging (AUX) control settings>>image:1732208939544-710.png||data-xwiki-image-style-alignment="center" height="397" width="445"]]
148 -
149 -In this section:
150 -
151 -* Enable – a flag to activate the auxiliary discharge control;
152 -* Switch off the discharging (AUX) relay at low SOC:
153 -** Minimum SOC – a minimum SOC value, when reached, the auxiliary (AUX) discharging relay opens, %;
154 -** Tolerant SOC – a permissive SOC value, upon reaching which the auxiliary (AUX) discharging relay re-closes, %;
155 -* Switch off the discharging (AUX) relay if the battery voltage is out of the range:
156 -** Minimum voltage – minimum battery voltage, V;
157 -** Maximum voltage – maximum battery voltage, V;
158 -* 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.
159 -
160 -== 3.5.4 Charging/Discharging control ==
161 -
162 - BMS Main 2.x allows to control charging/discharging contactor that combines algorithms of charging and discharging contactor. It behaves as charging contactor when «Charge request» or «Charger connected» are set, otherwise – as discharging contactor.
163 -
164 -To change the parameters of the charging/discharging algorithm, select the menu "Cells → Charging/Discharging control":
165 -
166 -[[Charging/Discharging control settings>>image:1732209044117-558.png||data-xwiki-image-style-alignment="center" height="102" width="259"]]
167 -
168 -
169 -In this section:
170 -
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 -[[Caption>>image:1732209137414-912.png||data-xwiki-image-style-alignment="center" height="132" width="352"]]
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