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Changes for page 3.3 Control

Last modified by Admin on 2025/04/09 12:15
From version 19.2
edited by Admin
on 2025/02/24 11:46
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To version 6.1
edited by Admin
on 2025/02/24 10:55
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Summary

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... ... @@ -8,7 +8,7 @@
8 8  
9 9  To change the common BMS settings, select the "Control → Common settings" section:
10 10  
11 -[[image:1740394523706-519.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="127" width="800"]]
11 +[[image:1733746733473-873.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
12 12  
13 13  In this section:
14 14  
... ... @@ -16,18 +16,13 @@
16 16  * Cell resistance – nominal (maximum) internal resistance of the cell, Ohm;
17 17  * Relax time (after charging) – a relaxation time after charging, second;
18 18  * Relax time (atfer discharging) – the relaxation time after discharging, second;
19 +* Number of cycles – a number of charge-discharge cycles;
19 19  * Reset parameters– a command to reset cells state of charge, capacity, and resistance.
20 20  
21 -The values “Capacity” and “Resistance” are used to calculate the SOC of cells and the battery.
22 +The values “Capacity”, “Resistance”, “Cycles” are used to calculate the SOC of cells and the battery.
22 22  
23 23  The values of “Relax time” are used to determine the state of the battery. If the battery is in a state of relaxation, the system recalculates the voltage on the cells to the state of charge of the battery.
24 24  
25 -The “Reset parameters” will reset:
26 -
27 -* state of charge (new cell SOC values will be calculated based on cell voltage and “Uocv (open-circuit voltage) table”: in the “Control → SOC estimation” section);
28 -* cell resistance to “Cell resistance” value;
29 -* battery capacity to “Cell capacity” value.
30 -
31 31  The “Reset parameters” command is used for starting-up and adjustment of the battery.
32 32  
33 33  === SOC estimation ===
... ... @@ -49,14 +49,14 @@
49 49  * Current and voltage (simplified);
50 50  * Current and voltage (enhanced);
51 51  
52 -The **“Voltage”** SOC calculation algorithm calculates cells SOC based on the tabular dependence Uocv = Uocv(SOC, t °C).
47 +The SOC calculation algorithm for voltage calculates cells SOC based on the tabular dependence Uocv = Uocv(SOC, t °C).
53 53  
54 -The **“Current and voltage (simplified)”** SOC calculation algorithm works as follows:
49 +The SOC calculation algorithm “Current and voltage (simplified)” works as follows:
55 55  
56 56  * if I = 0, the battery is in a state of relaxation and the cell voltage Uocv is outside the [U,,ocv[point 1],,; U,,ocv[point 2],,], the SOC calculation based on the tabular dependence Uocv = Uocv(SOC, t °C);
57 57  * in any other cases, the SOC value is proportional to the charge (coulomb) passed through the battery (current time integral).
58 58  
59 -The **“Current and voltage (enhanced)” **SOC calculation algorithm differs from the simplified algorithm by online correction of effective capacitance. When using this algorithm, it is necessary to fine tune the tabular dependence Uocv = Uocv (SOC, t °C).
54 +The SOC calculation algorithm “Current and voltage (enhanced)” differs from the simplified algorithm by online correction of effective capacitance. When using this algorithm, it is necessary to fine tune the tabular dependence Uocv = Uocv (SOC, t °C).
60 60  
61 61  To change the algorithm for calculating the Final SOC, select the "Control → SOC estimation → Final SOC" section:
62 62  
... ... @@ -65,22 +65,32 @@
65 65  The following battery Final SOC calculation methods are supported:
66 66  
67 67  * Minimal SOC – SOC of the modular battery is assumed to be the minimum SOC among the battery modules;
68 -* Average SOC – SOC of the modular battery is taken equal to the arithmetic average of the SOC of the battery modules;
69 -* Min-Max SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells. Final SOC will be a) 100% if any cell has 100% SOC, b) 0% if any cell has 0% SOC;
70 -* Max-Min SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells. Final SOC will be a) 100% if all cells have 100% SOC, b) 0% if all cells have 0% SOC.
63 +* Average SOC – SOC of the modular battery is taken equal to the arithmetic average of the SOC of the battery modules.
71 71  
72 -Other parameters:
65 +To change other settings of SOC estimation, select the "Control → SOC estimation” section:
73 73  
67 +[[image:1733746733479-261.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="165" width="800"]]
68 +
69 +In this section:
70 +
74 74  * Scale the final SOC – a flag to scale the battery SOC by the following values;
75 -* SOC corresponding to 0% – the battery SOC that sets to be 0%;
76 -* SOC corresponding to 100% – the battery SOC that sets to be 100%.
72 +* SOC corresponding to 0% – battery SOC that sets to be 0%;
73 +* SOC corresponding to 100% – battery SOC that sets to be 100%.
77 77  * Uocv (open-circuit voltage) table – the dependence of the cell open circuit voltage Uocv on SOC and the cell temperature (selected for specific batteries);
78 -* Linear zone - linear zone of the Uocv = Uocv(SOC, t°C) dependency, inside which the cell voltage changes insignificantly:
79 -** Linear zone: point 1 – starting point of the Uocv linear zone;
80 -** Linear zone: point 2 – ending point of the Uocv linear zone;
75 +
76 +[[image:1733746733480-919.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="484" width="800"]]
77 +
78 +* Linear zone: point 1 – starting point of the linear zone of Uocv dependence;
79 +* Linear zone: point 2 – ending point of the linear zone of Uocv dependence;
81 81  * Coulomb counting correction (temperature) – the dependence of battery capacity on temperature;
81 +
82 +[[image:1733746733481-286.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="160" width="800"]]
83 +
82 82  * Coulomb counting correction (cycles) – the dependence of battery capacity on the number of charge-discharge cycles.
83 83  
86 +[[image:1733746733482-538.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="161" width="800"]]
87 +
88 +
84 84  === SOC correction ===
85 85  
86 86  The BMS Mini device can recalculate the battery SOC after long-term storage or after long-term working in the case when the battery was not charged fully or discharged totally. Recalculation is done based on the tabular dependency Uocv = Uocv (SOC, t) (see [[SOC estimation>>doc:||anchor="HSOCestimation"]]).
... ... @@ -102,26 +102,18 @@
102 102  
103 103  Calculation of the resistance of cells is carried out in two ways. The first method is used when the battery passes from a relaxation state to a charge or discharge state, wherein the cell resistance value
104 104  
105 -{{formula fontSize="SMALL" imageType="PNG"}}
106 -R = \frac{U-U_{ocv}}{I_{stable}}
107 -{{/formula}}
110 +R = (U-U,,ocv,,) / I,,stable,,,
108 108  
109 109  where U is the cell voltage measured in the charge or discharge state, V; U,,ocv,, is the cell voltage measured in the state of relaxation (before switching to the state of charge or discharge); I,,stable,, – stabilized current through the cell in the state of charge or discharge.
110 110  
111 111  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
112 112  
113 -{{formula fontSize="SMALL"}}
114 -R = \frac{U_2-U_1}{I_{stable2}-I_{stable1}}
115 -{{/formula}}
116 +R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,) provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
116 116  
117 -provided that
118 +(Q,,max,, is the maximum cell capacity),
118 118  
119 -{{formula fontSize="SMALL"}}
120 -| I_{stable2}-I_{stable1} | > 0.2 × Qmax
121 -{{/formula}}
120 +where U,,2,, is the voltage on the cell at the moment when the stabilized current I,,stable2,, is flowing through it; U,,1,, – the voltage on the cell at the moment when the stabilized current I,,stable1,, flowing through it.
122 122  
123 -where Q,,max,, — the maximum cell capacity,U,,2,, — voltage on the cell at the moment when the stabilized current I,,stable2,, is flowing through it; U,,1,, — the voltage on the cell at the moment when the stabilized current I,,stable1,, flowing through it.
124 -
125 125  The stabilized current I,,stable,, = I, if during the stabilization time the instantaneous current I is in the range from 0.95 × I to 1.05 × I.
126 126  
127 127  To change parameters of the algorithm for calculating the cell resistance, select the "Control → Resistance estimation" section:
... ... @@ -138,62 +138,6 @@
138 138  
139 139  The calculated resistance is accepted by the system as valid (and therefore updated) if its value is in the range from Resistance/2 to “Maximum resistance factor” × Resistance, where "Resistance" is the nominal resistance of the cell (see [[Common settings>>doc:||anchor="HCommonsettings"]]). If the calculated resistance value is greater than the value (Maximum resistance factor × Resistance), the updated resistance value will be equal to the value (Maximum resistance factor × Resistance).
140 140  
141 -=== Low SOC (signal) ===
142 -
143 -To change the parameters of the generation a signal about low battery level, select the "Control → Low SOC (signal)" section:
144 -
145 -[[image:1740396460923-423.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="141" width="800"]]
146 -
147 -In this section:
148 -
149 -* Enable – a flag to enable signal generation;
150 -* Minimum SOC, %;
151 -* Tolerant SOC, %;
152 -* Delay before setting the signal, second;
153 -* Delay before clearing the signal, second;
154 -* Lock – lock the signal until the device is reset.
155 -
156 -Signal generation conditions:
157 -
158 -* the battery SOC is less than the “Minimum SOC” value during the “Delay before setting the signal” time.
159 -
160 -Conditions for clearing the signal:
161 -
162 -* the battery SOC is greater than the “Tolerant SOC” during the “Delay before clearing the signal” time.
163 -
164 -(% class="box infomessage" %)
165 -(((
166 -The "Low SOC signal" is indicative and can be output to a discrete output or a power switch.
167 -)))
168 -
169 -=== High charging current (signal) ===
170 -
171 -To change the parameters of the generation high-current signal, select the "Control → High charging current (signal)" section:
172 -
173 -[[image:1740396996935-403.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="144" width="800"]]
174 -
175 -In this section:
176 -
177 -* Enable – a flag to enable signal generation;
178 -* Maximum charging current, А;
179 -* Tolerant charging current, А;
180 -* Delay before setting the signal, second;
181 -* Delay before clearing the signal, second;
182 -* Lock – lock the signal until the device is reset.
183 -
184 -Signal generation conditions:
185 -
186 -* the measured current is greater than the “Maximum charging current” value during the “Delay before setting the signal” time.
187 -
188 -Conditions for clearing the signal:
189 -
190 -* the measured current is less than the “Tolerant charging current” value during the “Delay before clearing the signal” time.
191 -
192 -(% class="box infomessage" %)
193 -(((
194 -The "High charging current" signal is indicative and can be output to a discrete output or a power switch.
195 -)))
196 -
197 197  === Charge map ===
198 198  
199 199  The BMS Mini device calculates maximum allowable charge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
... ... @@ -202,25 +202,31 @@
202 202  
203 203  To configure parameters for determining the charge current limit, select the "Control → Charge map" section:
204 204  
205 -[[image:1740397188247-315.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="179" width="800"]]
146 +[[image:1733746766504-864.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
147 +
206 206  In this section:
207 207  
208 208  * Enable – a flag to start calculation of the charge current limit;
209 -* Maximum charge current – a maximum allowable value of the charge current (under normal conditions), A;
210 -* Rate of change – a rate of change the current limit to a new value (0 is for immediate change), A/s;
211 -* Option 1: Limit charge current by the battery SOC and temperature – a flag to enable correction of maximum allowable charging current** Kcs** depending on SOC and battery temperature;
151 +* Maximum charge current – a maximum allowable value of the charge current (under normal conditions):
152 +* Option 1: Limit charge current by the battery SOC and temperature – a flag to enable correction of maximum allowable charging current Kcs depending on SOC and battery temperature;
212 212  * Option 1: SOC x Temperature x Factor – the dependence of the correction factor on SOC and battery temperature;
213 -* Option 2: Limit charge current by the contactor temperature – a flag to enable correction of maximum allowable charging current **Kcc** depending on contactor temperature;
154 +
155 +[[image:1733746766506-660.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="196" width="800"]]
156 +
157 +* Option 2: Limit charge current by the contactor temperature – a flag to enable correction of maximum allowable charging current Kcc depending on contactor temperature;
214 214  * Option 2: Contactor temperature x Factor – the dependence of the correction factor on SOC and contactor temperature;
215 -* Option 3: Limit charge current by the maximum cell voltage - a flag to enable correction of maximum allowable charging current **Kcv** depending on maximum cell voltage;
216 -* Option 3: Cell voltage x Factor – the dependence of the correction factor on maximum cell voltage;
217 -* Option 4: Limit charge current by the cell temperature - a flag to enable correction of maximum allowable charging current **Kct** depending on maximum cell temperature;
218 -* Option 4: Cell temperature x Factor – the dependence of the correction factor on maximum cell temperature.
219 219  
220 -Value of the charge current limit at given SOC, temperature, contactors temperature, maximum cell voltage and maximum cell temperature is calculated as follows:
160 +[[image:1733746766508-178.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="184" width="800"]]
221 221  
222 -**Charge current limit = Maximum charge current × Kcs × Kcc × Kcv × Kct**
162 +* Option 3: Limit charge current by the maximum cell voltage - a flag to enable correction of maximum allowable charging current Kcv depending on maximum cell voltage;
163 +* Option 3: Cell voltage x Factor – the dependence of the correction factor on maximum cell voltage.
223 223  
165 +[[image:1733746766509-971.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="217" width="800"]]
166 +
167 +Value of the charge current limit at given SOC, temperature, contactors temperature and maximum cell voltage is calculated as follows:
168 +
169 +Charging current limit = Maximum charging current × Kcs × Kcc × Kcv
170 +
224 224  === Discharge map ===
225 225  
226 226  The BMS Mini device calculates maximum allowable discharge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
... ... @@ -229,72 +229,31 @@
229 229  
230 230  To configure parameters for determining the discharge current limit, select the "Control → Discharge map" section:
231 231  
232 -[[image:1740397304972-174.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="182" width="800"]]
179 +[[image:1733746766511-477.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="149" width="800"]]
233 233  
234 234  In this section:
235 235  
236 236  * Enable – a flag to start calculation of the discharge current limit;
237 -* Maximum discharge current – a maximum allowable value of the discharge current (under normal conditions), A;
238 -* Rate of change – a rate of change the current limit to a new value (0 is for immediate change), A/s;
239 -* Option 1: Limit discharging current by the battery SOC and temperature – a flag to enable correction of maximum allowable discharging current **Kds **depending on SOC and temperature;
184 +* Maximum discharge current – a maximum allowable value of the discharge current (under normal conditions):
185 +* Option 1: Limit discharging current by the battery SOC and temperature – a flag to enable correction of maximum allowable discharging current Kds depending on SOC and temperature;
240 240  * Option 1: SOC x Temperature x Factor – the dependence of the correction factor on SOC and battery temperature;
241 -* Option 2: Limit discharge current by the contactor temperature – a flag to enable correction of maximum allowable discharging current **Kdc** depending on contactor temperature;
242 -* Option 2: Contactor temperature x Factor – the dependence of the correction factor on SOC and contactor temperature;
243 -* Option 3: Limit discharge current by the cell voltage - a flag to enable correction of maximum allowable discharging current **Kdv** depending on minimum cell voltage;
244 -* Option 3: Cell voltage x Factor – the dependence of the correction factor on minimum cell voltage;
245 -* Option 4: Limit discharge current by the cell temperature - a flag to enable correction of maximum allowable discharging current **Kdt** depending on maximum cell temperature;
246 -* Option 4: Cell voltage x Factor – the dependence of the correction factor on minimum cell temperature.
247 247  
248 -Value of the discharge current limit at given SOC, temperature, contactors temperature, minimum cell voltage and maximum cell temperature is calculated as follows:
188 +[[image:1733746766512-300.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="195" width="800"]]
249 249  
250 -**Discharge current limit = Maximum discharge current × Kds × Kdc × Kdv × Kdt**
190 +* Option 2: Limit discharge current by the contactor temperature – a flag to enable correction of maximum allowable discharging current Kdc depending on contactor temperature;
191 +* Option 2: Contactor temperature x Factor – the dependence of the correction factor on SOC and contactor temperature;
251 251  
252 -=== Main contactor ===
193 +[[image:1733746766513-161.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="183" width="800"]]
253 253  
254 -The BMS Mini 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 a case of sealing of the charging or discharging contactors.
195 +* Option 3: Limit discharge current by the cell voltage - a flag to enable correction of maximum allowable discharging current Kdv depending on minimum cell voltage;
196 +* Option 3: Cell voltage x Factor – the dependence of the correction factor on minimum cell voltage.
255 255  
256 -The Main contactor algorithm supports the following modes:
198 +[[image:1733746766514-686.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="215" width="800"]]
257 257  
258 -* Always on;
259 -* Automatic.
200 +Value of the discharge current limit at given SOC, temperature, contactors temperature and minimum cell voltage is calculated as follows:
260 260  
261 -In “Always on” mode main contactor closes if all the following is true:
202 +Discharging current limit = Maximum discharging current × Kds × Kdc × Kdv
262 262  
263 -* Other contactors are open;
264 -* There are no errors from the "Errors 1, 2 ..." bitfileds.
265 -
266 -In “Always on” mode main contactor opens if all the following is true:
267 -
268 -* Other contactors are open;
269 -* There is an error from the the "Errors 1, 2 ..." bitfileds.
270 -
271 -In “Automatic” mode, the main contactor closes by internal algorithms at the same time with other contactors.
272 -
273 -In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
274 -
275 -(% class="box infomessage" %)
276 -(((
277 -**Note: **when errors occur in the system, the **Main **contactor opens either immediately or with the delay T,,off,, (depends on the settings described below).
278 -)))
279 -
280 -To change the parameters of the main contactor, select the "Control → Main contactor" section:
281 -
282 -[[image:1740397558976-651.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="144" width="800"]]
283 -
284 -In this section:
285 -
286 -* Enable – a flag to enable the main contactor control;
287 -* Algorithm – main contactor control algorithm:
288 -** Always on – contactor is always closed;
289 -** Automatic – contactor closes by internal charge and discharge algorithms;
290 -** On demand – contactor is closed by an external request;
291 -* Time to keep the contactor closed before closing the others – a time for other contactors to be open after the main contactor is closed;
292 -* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, s;
293 -* Keep the contactor open until the device is restarted – a flag for keeping the main contactor open until the system is reset;
294 -* Errors 1, 2 to open the main contactor – bitfields to choose the errors which will open the main contactor.
295 -
296 -*
297 -
298 298  === Charge ===
299 299  
300 300  There are two contactors that serve charging the battery: a charging contactor and an allow charging contactor. With the help of the allow charging contactor, the BMS commands the charger to start or stop charging.
... ... @@ -479,8 +479,38 @@
479 479  * Maximum voltage – maximum battery voltage, V;
480 480  * Switch off the discharging (AUX) contactor on errors – the auxiliary (AUX) discharging contactor opens if the following errors occur: Undervoltage, Overcurrent, High temperature (DCH), Short circuit, Critical error.
481 481  
482 -=== ===
388 +=== Main contactor ===
483 483  
390 +The BMS Mini 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 a case of sealing of the charging or discharging contactors.
391 +
392 +The main contactor closes if there are no errors from the list below:
393 +
394 +* Overcurrent;
395 +* Undervoltage;
396 +* Overvoltage;
397 +* High temperature (CH);
398 +* High temperature (DCH);
399 +* Unallowable charging;
400 +* Critical error.
401 +
402 +The main contactor opens if the charging and discharging contactors are opened and any of the following conditions is met:
403 +
404 +* charging or discharging current is detected during a set time;
405 +* voltage of any cell is lower than the minimum cell voltage configured in the section "Protections → Undervoltage" during a set time;
406 +* voltage of any cell is greater than the maximum cell voltage configured in the section "Protections → Overvoltage" during a set time;
407 +* temperature of any cell is greater than the maximum cell temperature configured in the section "Protections → High temperature" during a set time;
408 +* Critical error stays on during a set time.
409 +
410 +To change the parameters of the main contactor, select the "Control → Main contactor" section:
411 +
412 +[[image:1733746797002-498.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="93" width="800"]]
413 +
414 +In this section:
415 +
416 +* Enable – a flag to enable the main contactor control;
417 +* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, second;
418 +* Keep the contactor open until the device is restarted – a flag for keeping the main contactor opened until the system be reset.
419 +
484 484  === Cell balancing ===
485 485  
486 486  Balancing makes the voltage of all cells be equal to the minimum cell voltage.
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