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Changes for page 3.4 Battery parameters

Last modified by Admin on 2025/04/09 12:04
From version 10.1
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1 -drafts.bms-main-2-1.configuration.WebHome
1 +xwiki:drafts.BMS Main 2\.1.configuration.WebHome
Content
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2 2  
3 3  To change the default cell settings, select the menu "Cells → Cell defaults":
4 4  
5 -[[Cell default section>>image:1732205873121-893.png||data-xwiki-image-style-alignment="center" height="313" width="416"]]
5 +[[image:1732205873121-893.png||data-xwiki-image-style-alignment="center" height="313" width="416"]]
6 6  
7 7   In this section:
8 8  
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31 31  
32 32  To change the parameters of the algorithm for calculating the battery SOC, select the menu "Cells → SOC estimation":
33 33  
34 -[[SOC estimation section>>image:1732206031847-819.png||data-xwiki-image-style-alignment="center" height="849" width="356"]]
34 +[[image:1732206031847-819.png||data-xwiki-image-style-alignment="center" height="849" width="356"]]
35 35  
36 36  In this section:
37 37  
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81 81  
82 82  To change parameters of the algorithm for calculating the cell resistance, select the menu "Cells → Cell resistance estimation":
83 83  
84 -[[Cell resistance estimation settings>>image:1732207338609-903.png||data-xwiki-image-style-alignment="center" height="187" width="337"]]
84 +[[image:1732207338609-903.png||data-xwiki-image-style-alignment="center" height="187" width="337"]]
85 85  
86 86  In this section:
87 87  
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119 119  
120 120  To change the cell balancing parameters, select the menu "Cell → Cell balancing":
121 121  
122 -[[Cell balancing settings>>image:1732207485773-804.png||data-xwiki-image-style-alignment="center" height="264" width="387"]]
122 +[[image:1732207485773-804.png||data-xwiki-image-style-alignment="center" height="264" width="387"]]
123 123  
124 124  In this section:
125 125  
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151 151  
152 152  To change the series balancing parameters, select the menu "Cell → Series balancing":
153 153  
154 -[[Series balancing settings>>image:1732207584941-447.png||data-xwiki-image-style-alignment="center" height="258" width="438"]]
154 +[[image:1732207584941-447.png||data-xwiki-image-style-alignment="center" height="258" width="438"]]
155 155  
156 156  In this section:
157 157  
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176 176  
177 177  To configure parameters for determining the discharge characteristic of the battery, select the menu "Cells → Cell analysis":
178 178  
179 -[[Cell analysis section>>image:1732207696322-587.png||data-xwiki-image-style-alignment="center" height="213" width="258"]]
179 +[[image:1732207696322-587.png||data-xwiki-image-style-alignment="center" height="213" width="258"]]
180 180  
181 181  In this section:
182 182  
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229 229  
230 230  The BMS Main 2.x board calculates maximum allowable charge current values in respect to SOC and battery temperature, contactor temperature and maximum cell voltage.
231 231  
232 -Calculated currents values are sending to chargers or intellectual loads over the CAN bus.
232 +Calculated currents values are sending to chargers over the CAN bus.
233 233  
234 234  To configure parameters for determining the charge current limit, select the menu "Cells → Charge current map":
235 235  
236 -[[Charge current map settings>>image:1732208033738-498.png||data-xwiki-image-style-alignment="center" height="655" width="453"]]
236 +[[image:1732208033738-498.png||data-xwiki-image-style-alignment="center" height="655" width="453"]]
237 237  
238 238  In this section:
239 239  
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241 241  * Maximum charging current – a maximum allowable value of the charge current (under normal conditions):
242 242  * Limit charging current by the battery SOC and temperature – a flag to enable correction of maximum allowable charging current Kcs depending on SOC and temperature;
243 243  * Limit charging current by the contactor temperature – a flag to enable correction of maximum allowable charging current Kcc depending on the contactor temperature;
244 -* Limit charging current by the maximum cell voltage - a flag to enable correction of maximum allowable charging current Kcv depending on maximum cell voltage;
245 -* Limit charging current by the maximum cell temperature - a flag to enable correction of maximum allowable charging current Kc depending on maximum cell voltage.
244 +* Limit charging current by the maximum cell voltage – a flag to enable correction of maximum allowable charging current Kcv depending on maximum cell voltage;
245 +* Limit charging current by the maximum cell temperature – a flag to enable correction of maximum allowable charging current Kct depending on cell temperature.
246 246  
247 247  Value of the charge current limit at given SOC, temperature, contactors temperature and maximum cell voltage is calculated as follows:
248 248  
249 -Charging current limit = Maximum charging current × Kcs × Kcc × Kcv
249 +Charging current limit = Maximum charging current × Kcs × Kcc × Kcv × Kct.
250 250  
251 251  == 3.4.8 Discharge current map ==
252 252  
253 253  The BMS Main 2.x board calculates maximum allowable discharge current values in respect to SOC and battery temperature, contactor temperature and maximum cell voltage.
254 254  
255 -Calculated currents values are sending to chargers or intellectual loads over the CAN bus.
255 +Calculated currents values are sending or intellectual loads over the CAN bus.
256 256  
257 257  To configure parameters for determining the charge current limit, select the menu "Cells → Charge current map":
258 258  
259 +[[image:1732208218667-968.png||data-xwiki-image-style-alignment="center" height="631" width="434"]]
260 +
261 +In this section:
262 +
263 +* Enable – a flag to start calculation of the discharge current limit;
264 +* Maximum discharging current – a maximum allowable value of the discharge current (under normal conditions):
265 +* Current factor – the dependence of the correction factor on SOC and the battery temperature – Kdischarge=Kdischarge (SOC, t°C).
266 +* 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;
267 +* Limit discharging current by the contactor temperature – a flag to enable correction of maximum allowable discharging current Kdc depending on the contactor temperature;
268 +* Limit discharging current by the maximum cell voltage - a flag to enable correction of maximum allowable discharging current Kdv depending on maximum cell voltage;
269 +* Limit discharging current by the maximum cell temperature - a flag to enable correction of maximum allowable discharging current Kdt depending on cell temperature .
270 +
271 +Value of the discharge current limit at given SOC, temperature, contactors temperature and maximum cell voltage is calculated as follows:
272 +
273 +Discharging current limit = Maximum discharging current × Kds × Kdc × Kdv × Kdt.
274 +
259 259  == 3.4.9 SOC correction ==
260 260  
261 261  The BMS Main 2.x board 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 section Calculating the state of charge (SOC)).
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262 262  
263 263  To configure parameters for periodically correcting the battery state of charge, select the menu "Cells → SOC correction":
264 264  
265 -[[SOC correction settings>>image:1732206262509-786.png||data-xwiki-image-style-alignment="center" height="291" width="298"]]
281 +[[image:1732206262509-786.png||data-xwiki-image-style-alignment="center" height="291" width="298"]]
266 266  
267 267   In this section:
268 268  
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269 269  * Enable – a flag to enable SOC correction;
270 270  * Shutdown period – a time the battery is off, day. If the BMS detects on its startup that it was off during the “Shutdown period” time, the BMS recalculates the battery state of charge base on the tabular dependency Uocv = Uocv (SOC, t);
271 271  * Correction period – a period of correcting the battery SOC, day. If the BMS detects that the last correction was more than the “Correction period” ago, the BMS recalculates the battery state of charge base on the tabular dependency Uocv = Uocv (SOC, t) and tunes it gradually during the “SOC change time”;
272 -* SOC change time – a duration of the linear changing the battery SOC to the value calculated by the correction algorithm, minute.
288 +* SOC change time – a duration of the linear changing the battery SOC to the value calculated by the correction algorithm, minute;
289 +* Ignore the linear zone – a flag to ignore linear zone while calculating SOC correction.
273 273  
274 274