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Changes for page 3.3 Control

Last modified by Admin on 2025/05/30 16:50
From version 6.3
edited by Admin
on 2025/01/28 16:05
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To version 10.2
edited by Admin
on 2025/01/28 16:19
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40 40  
41 41  * Minimal SOC – SOC of the modular battery is assumed to be the minimum SOC among the battery modules;
42 42  * Average SOC – SOC of the modular battery is taken equal to the arithmetic average of the SOC of the battery modules;
43 -* Min-Max SOC – SOC of the modular battery is calculated based on the minimal and maximum SOC of the battery modules.
43 +* Min-Max SOC – SOC of the modular battery is calculated based on the minimal and maximum SOC of the battery modules (optimized for maximum health);
44 +* Max-Min SOC – SOC of the modular battery is calculated based on the minimal and maximum SOC of the battery modules (optimized for maximum capacity, recommended);
44 44  
45 45  Calculation of the battery state of health (SOH) is configured in the "Control → Calculation → Final SOH" section. The following battery SOH calculation methods are supported:
46 46  
47 47  * Minimal SOH – SOH of the modular battery is assumed to be the minimum SOH among the battery modules;
49 +* Average SOH – SOH of the modular battery is taken equal to the arithmetic average of the SOH of the battery modules.
48 48  
49 -Average SOH – SOH of the modular battery is taken equal to the arithmetic average of the SOH of the battery modules.
50 -
51 51  === Main contactor ===
52 52  
53 53  The BMS Main 3X device controls the main contactor. The main contactor is usually placed in the common (minus) battery line for opening the charge and discharge circuits in case of sealing of the charging or discharging contactors.
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55 55  The Main contactor algorithm supports the following modes:
56 56  
57 57  * Always on;
58 -* Automatic, when the main contactor closes by the internal charging and discharging algorithms at the same time with Precharging, Charging and Discharging contactors.
58 +* Automatic, when the main contactor closes by the internal charging and discharging algorithms at the same time with Precharging, Charging, Discharging and Charging/Discharging contactors.
59 59  
60 60  In “Always on” mode, the main contactor closes if all the following is true:
61 61  
62 62  * “Charging” contactor is open;
63 63  * “Discharging” contactor is open;
64 -
65 65  * there are no errors.
66 66  
67 67  In “Always on” mode, the main contactor opens if “Charging” and “Discharging” contactors are open and any of the following is true:
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111 111  
112 112  To change the precharge parameters, select the section “Control → Precharge”:
113 113  
114 -[[image:1734089664376-736.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="56" width="600"]]
113 +[[image:1738080762857-975.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="108" width="600"]]In this section:
115 115  
116 -In this section:
117 117  
118 118  * Precharge current threshold to close the discharging contactor – a current value to ensure that precharge process has finished and it is allowed to close the discharging contactor, A;
119 119  * Check voltages before and after contactors to finish precharging – a flag to check the voltages before and after contactors to ensure that precharge process has finished and it is allowed to close the discharging contactor;
120 -* Minimum voltage difference to finish precharging – a minimum voltage difference before and after contactors to ensure precharge process finished, V.
118 +* Minimum voltage difference before and after contactors to finish precharging – a minimum voltage difference before and after contactors to ensure precharge process finished, V;
119 +* Number of precharging attempts – maximum number of precharging attempts before setting the "Precharge error";
120 +* Precharge time – a duration of closing the precharge contactor before closing the discharging contactor, millisecond;
121 +* Relaxation between attempts – a duration between precharge attempts, millisecond;
122 +* Check the power dissipated in the preacharge resistor - a flag to enable the calculation of power dissipated in precharge resistor;
123 +* Precharge resistor resistance, Ohm;
124 +* Maximum allowable power dissipated in the resistor, W;
125 +* Delay before setting the "Precharge error" when checking power, millisecond;
126 +* Delay before clearing the "Precharge error", second;
127 +* Lock the "Precharge error" – a flag to block the error until the device is restarted.
121 121  
129 +“Precharge error” generation conditions:
130 +
131 +* the precharge current does not decrease after "Number of precharging attempts";
132 +* voltages before and after contactors are not equal after "Number of precharging attempts";
133 +* power dissipated on the precharge resistor is above the maximum value during the “Delay before setting the 'Precharge error' when checking power” time.
134 +
135 +(% class="box warningmessage" %)
136 +(((
137 +Behavior of contactors at “Precharge error” is configured in corresponding contactor settings!
138 +)))
139 +
122 122  === Charge ===
123 123  
124 124  The BMS Main 3X device manages the parallel connection of the battery modules and the connection of the battery to the charging circuit.
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156 156  
157 157  The battery charge management is configured in the "Control → Charge" section:
158 158  
159 -[[image:1734089684907-463.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="180" width="600"]]
177 +[[image:1738081025199-282.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="162" width="600"]]
160 160  
161 161  In this section:
162 162  
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169 169  * Allowable battery current to rejoin modules – a battery current at which joining of battery modules is permitted, A;
170 170  * 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;
171 171  * Checking voltages time – a time of checking voltages of battery modules, millisecond;
172 -* Pre-balancing modules time – a time of pre-charging battery modules, millisecond;
173 173  * Balancing modules time – a time of balancing battery modules, millisecond;
174 174  * Control the precharging contactor – a flag to control the main precharging contactor;
175 -* Precharging time – a time of precharging, millisecond;
176 176  * Canceling charging time – a delay before opening the main charging contactor, ms;
177 -* Limit module current – a flag that allows to limit the charging current of a modular battery so that the current of each battery module does not exceed its maximum allowable charge current;
178 -* Slew rate – a rate of change of the charge current limit when the “Limit module current” flag is set, A/s;
179 179  * Disconnect modules that are not ready to charge – a flag for disconnecting modules that have the “Ready to charge” signal cleared.
180 180  * Disconnect all modules if one is not ready to charge – a flag for disconnecting all modules if any of the modules have the “Ready to charge” signal cleared;
181 181  * Join modules on the “Charge request” signal – a flag to enable automatic modules joining if “Charge request” signal appears;
196 +* Maximum CONTINUOUS charge current limit – a maximum continuous allowed charging current of all battery, A;
182 182  * Maximum charge current limit – a maximum allowed charging current of all battery, A;
183 183  * Errors 1 (2) to disconnect all battery modules – errors that cause all battery modules to be disconnected from the common bus;
184 184  * Errors 1 (2) to open the charging contactor – errors that cause the main charging contactor "Charging" to open;
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221 221  
222 222  The battery discharge management is configured in the "Control → Discharge" section:
223 223  
224 -[[image:1734089702987-534.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="179" width="600"]]
239 +[[image:1738081173083-894.png]]
225 225  
226 226  In this section:
227 227  
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234 234  * Allowable battery current to rejoin modules – a battery current at which joining of battery modules is permitted, A;
235 235  * 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;
236 236  * Checking voltages time – a time of checking voltages of battery modules, millisecond;
237 -* Pre-balancing modules time – a time of precharging battery modules, millisecond;
238 238  * Balancing modules time – a time of balancing battery modules, millisecond;
239 239  * Control the precharging contactor – a flag to control the main precharging contactor;
240 -* Precharging time – a time of precharging, millisecond;
241 241  * Canceling discharging time – a delay before opening the main discharging contactor, millisecond;
242 -* Limit module current – a flag that allows to limit the discharging current of a modular battery so that the current of each battery module does not exceed its maximum allowable discharge current;
243 -* Slew rate – a rate of change of the discharge current limit when the “Limit module current” flag is set, A/s;
244 244  * Disconnect modules that are not ready to discharge – a flag for disconnecting modules that have the “Ready to discharge” signal cleared.
245 245  * Disconnect all modules if one is not ready to discharge – a flag for disconnecting all modules if one of the modules have the “Ready to discharge” signal cleared;
246 246  * Join modules on the “Discharge request” signal – a flag to enable automatic modules joining if “Discharge request” signal appears;
258 +* Maximum CONTINUOUS discharge current limit – a maximum allowed continuous discharging current of all the battery, A;
247 247  * Maximum discharge current limit – a maximum allowed discharging current of all the battery, A;
248 248  * Errors 1 (2) to disconnect all battery modules – errors that cause all battery modules to be disconnected from the common bus;
249 249  * Errors 1 (2) to open the discharging contactor – errors that cause the main discharging contactor "Discharging" to open,
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