Changes for page 3.6 Battery protection

Summary

• Page properties (1 modified, 0 added, 0 removed)

Details

Page properties

Content

...	...	@@ -279,24 +279,226 @@
279	279
280	280	* the voltage in the signal line or zero level line of the current sensor is in range from (Minimum voltage + Hysteresis voltage) to (Maximum voltage - Hysteresis voltage) during the “Delay before clearing the error” time.
281	281
	282	+(% class="box warningmessage" %)
	283	+(((
282	282	**If there is the “Current sensor error”, the “Critical error” is generated and all relays open.**
	285	+)))
283	283
284	284	== 3.6.10 Short circuit protection ==
285	285
	289	+The BMS implements a protection of power circuits (contactors, power cables) against overheating caused by the flow of high current for a long time.
	290	+
	291	+To change the protection parameters from short circuit, select the menu "Protections → Short circuit protection":
	292	+
	293	+
	294	+In this section:
	295	+
	296	+* Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
	297	+** Enable – a flag to enable the protection;
	298	+** Maximum current, A;
	299	+** Delay before setting the error, second;
	300	+* Delay before clearing the error, second;
	301	+* Switch off the charging relay on error – a flag to open the charging relay when the "Short circuit" error occurs;
	302	+* Switch off the discharging relay on error – a flag to open the discharging relay when the "Short circuit" error occurs;
	303	+* Lock the error until the device is reset.
	304	+
	305	+If there is a short circuit, the "Short circuit" error is generated.
	306	+
	307	+Error generation conditions:
	308	+
	309	+* at any of the three protection levels, the current modulo is greater than the “Maximum current” value during the “Delay before setting the error” time.
	310	+
	311	+Conditions for removing the error:
	312	+
	313	+* the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
	314	+
	315	+(% class="box infomessage" %)
	316	+(((
	317	+If there is the "Short circuit" error, the charging relay opens (the “Switch off the charging relay on error” flag is set) and the discharging relay opens (the “Switch off the discharging relay on error flag” is set).
	318	+)))
	319	+
286	286	== 3.6.11 Contactor high temperature protection ==
287	287
	322	+The BMS protects power contactors from overheating. To measure the temperature of the contactor, a thermistor is used, connected to the P13 connector of the board. Configuring of the analog input for temperature measurement is described in section Input signals.
	323	+
	324	+To change the overheating protection parameters of power contactors, select the menu "Protections → Contactor high temperature protection":
	325	+
	326	+
	327	+In this section:
	328	+
	329	+* Enable – a flag to enable the protection;
	330	+* Maximum temperature, °C;
	331	+* Tolerant temperature, °C;
	332	+* Delay before setting the error, second;
	333	+* Delay before clearing the error, second;
	334	+* Switch off the charging relay on error – a flag to open the charging relay when the "Contactor high temperature" error occurs;
	335	+* Switch off the discharging relay on error – a flag to open the discharging relay when the "Contactor high temperature" error occurs;
	336	+* Lock the error until the device is reset.
	337	+
	338	+If there is a contactor overheat, the "Contactor high temperature" error is generated.
	339	+
	340	+Error generation conditions:
	341	+
	342	+* the contactor temperature is greater than the “Maximum temperature” value during the “Delay before setting the error” time.
	343	+
	344	+Conditions for removing the error:
	345	+
	346	+* the contactor temperature is lower than the “Tolerant temperature” value during the “Delay before clearing the error” time.
	347	+
	348	+(% class="box infomessage" %)
	349	+(((
	350	+If there is the "Contactor high temperature" error, the charging relay opens (the “Switch off the charging relay on error” flag is set) and the discharging relay opens (the “Switch off the discharging relay on error flag” is set).
	351	+)))
	352	+
288	288	== 3.6.12 Unallowable charging protection ==
289	289
	355	+The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging relay to prevent unallowable battery operation.
	356	+
	357	+To change the parameters of the unallowable charging protection, select the menu "Protections → Unallowable charging protection":
	358	+
	359	+
	360	+In this section:
	361	+
	362	+* Enable – a flag to enable the protection;
	363	+* Delay before setting the error, second;
	364	+* Delay before clearing the error, second;
	365	+* Lock the error until the device is reset.
	366	+
	367	+If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
	368	+
	369	+Error generation conditions:
	370	+
	371	+* the charging relay is open and the battery current is not zero during the “Delay before setting the error” time.
	372	+
	373	+Conditions for removing the error:
	374	+
	375	+* the battery current is zero during the “Delay before clearing the error” time.
	376	+
	377	+(% class="box infomessage" %)
	378	+(((
	379	+If there is the "Unallowable charging" error, the discharging relay opens.
	380	+)))
	381	+
290	290	== 3.6.13 Stuck contactor protection ==
291	291
	384	+The BMS Main 2.x protects contactors against sticking.
	385	+
	386	+To change the protection parameters against sticking, select the menu "Protections → Stuck contactor protection":
	387	+
	388	+
	389	+In this section:
	390	+
	391	+* Enable – a flag to enable the protection;
	392	+* Delay before setting the error, second;
	393	+* Delay before clearing the error, second;
	394	+* Lock the error until the device is reset;
	395	+
	396	+If there is a stuck contactor, the “Stuck contactor” error is generated.
	397	+
	398	+Error generation conditions:
	399	+
	400	+* charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
	401	+
292	292	== 3.6.14 Contactor feedback check ==
293	293
	404	+The BMS Main 2.x can receive feedback signals from contactors and detect discrepancy between the control value and the feedback signal. To enable specific contactor protection, one of the discrete input must be set as corresponding contactor feedback signal (see section Input and output signals).
	405	+
	406	+To change the contactor feedback check parameters, select the menu "Protections → Contactor feedback check":
	407	+
	408	+
	409	+In this section:
	410	+
	411	+* Enable – a flag to enable the protection;
	412	+* Delay before setting the error, second;
	413	+* Delay before clearing the error, second;
	414	+* Lock the error until the device is reset;
	415	+
	416	+If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
	417	+
	418	+* discrete output of charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
	419	+
294	294	== 3.6.15 Charging contactor cycles protection ==
295	295
	422	+The BMS protects the charging contactor against frequent switching.
	423	+
	424	+To change the protection parameters against high frequency switching of the charging contactor, select the menu "Protections → Charging contactor cycles protection":
	425	+
	426	+
	427	+In this section:
	428	+
	429	+* Enable – a flag to enable the protection;
	430	+* Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
	431	+* Period – a time in which the BMS counts switchings of the charging contactor, second;
	432	+* Delay before setting the error, second;
	433	+* Delay before clearing the error, second;
	434	+* Lock the error until the device is reset;
	435	+* Cycles – a number of the charging contactor switchings made during battery operation.
	436	+
	437	+If there is the high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
	438	+
	439	+Error generation conditions:
	440	+
	441	+* the number of switchings of the charging contactor for the “Period” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
	442	+
	443	+Conditions for removing the error:
	444	+
	445	+* the “Delay before clearing the error” time has passed since the error was generated.
	446	+
	447	+(% class="box infomessage" %)
	448	+(((
	449	+If there is the "CH contactor cycles error" error, the charging relay opens.
	450	+)))
	451	+
296	296	== 3.6.16 Discharging contactor cycles protection ==
297	297
	454	+The BMS protects the discharging contactor against frequent switching.
	455	+
	456	+To change the protection parameters against high frequency switching of the discharging contactor, select the menu "Protections → Discharging contactor cycles protection":
	457	+
	458	+
	459	+In this section:
	460	+
	461	+* Enable – a flag to enable the protection;
	462	+* Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
	463	+* Period – a time in which the BMS counts switchings of the charging contactor, second;
	464	+* Delay before setting the error, second;
	465	+* Delay before clearing the error, second;
	466	+* Lock the error until the device is reset;
	467	+* Cycles – a number of the charging contactor switchings made during battery operation.
	468	+
	469	+If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
	470	+
	471	+Error generation conditions:
	472	+
	473	+* the number of switchings of the discharging contactor for the “Period” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
	474	+
	475	+Conditions for removing the error:
	476	+
	477	+* the “Delay before clearing the error” time has passed since the error was generated.
	478	+
	479	+(% class="box infomessage" %)
	480	+(((
	481	+If there is the "DCH contactor cycles error" error, the discharging relay opens.
	482	+)))
	483	+
298	298	== 3.6.17 Temperature sensor error ==
299	299
	486	+The board is implemented to check the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
	487	+
	488	+To change the protection parameters of the temperature sensors circuits, select the menu "Protections → Temperature sensor error":
	489	+
	490	+
	491	+In this section:
	492	+
	493	+* Enable – a flag to enable the protection;
	494	+* Delay before setting the error, second;
	495	+* Delay before clearing the error, second;
	496	+* Lock the error until the device is reset.
	497	+
	498	+If there are no temperature sensors connected to a BMS Logic board or any temperature sensor is shorted, the "No temp. sensors" error and "Temp. sensor is shorted" error are generated respectively. These errors generated and removed with the “Delay before setting the error” and “Delay before clearing the error” delays.
	499	+
	500	+**If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the “Critical error” is generated and all relays open.**
	501	+
300	300	== 3.6.18 Logic high temperature protection ==
301	301
302	302	== 3.6.19 Logic offline protection ==