Accelerated error testing for wireless battery management systems
View Patent ↗Methods, apparatuses, and systems for accelerated error testing for wireless battery management systems are disclosed. Embodiments in accordance with the present disclosure are directed to wireless sensor systems, and specifically to wireless battery management systems (BMS) in vehicles. A test system for a BMS provides a plurality of interference test profiles each comprising interference signals for testing the BMS. For each interference test profile, the interference signals are broadcast by the test system during operation of the BMS. The test system samples packets received by the wireless network controller from at least one battery measurement device during the broadcast of the interference signals and determines a packet error rate (PER) of the BMS for the interference test profile.
1 . A method of accelerated error testing for wireless battery management systems, the method comprising:
providing at least one interference profile representing one or more interference signals for testing a battery management system (BMS), wherein the BMS includes a wireless network controller (WNC) and at least one battery module monitoring system (MMS) configured for wireless communication with the WNC;
broadcasting, during a test of the BMS, the one or more interference signals generated from the at least one interference profile;
recording packet reception data for the WNC during the test, wherein the packet reception data is based on packets wirelessly received by the WNC from the battery MMS; and
determining, based on the packet reception data, a packet error rate (PER) of the WNC for the at least one interference profile during the test.
2 . The method of claim 1 wherein recording packet reception data for the WNC during the test includes:
recording packet reception data during a first sampling period;
adjusting a signal power of the one or more interference signals; and
recording packet reception data during a second sampling period; and
wherein determining a PER of the WNC for the at least one interference profile during the test includes determining a first PER of the WNC for the first sampling period and determining a second PER of the WNC for the second sampling period.
3 . The method of claim 1 , wherein recording packet reception data for the WNC during the test includes:
recording packet reception data during a first sampling period;
adjusting a signal power of transmission from the battery MMS to the WNC; and
recording packet reception data during a second sampling period; and
wherein determining a PER of the WNC for the at least one interference profile during the test includes determining a PER of the WNC for the first sampling period and determining a PER of the WNC for the second sampling period.
4 . The method of claim 1 , wherein recording packet reception data for the WNC during the test includes rotating the battery MMS during the test.
5 . The method of claim 1 further comprising generating the at least one interference profile representing one or more interference signals for testing the BMS.
6 . The method of claim 1 , where an orientation of the battery MMS within a battery pack is inverted such that an antenna of the battery MMS is oriented away from the WNC.
7 . The method of claim 1 , wherein the at least one interference profile emulates a standard wireless communication protocol, and wherein the battery MMS and WNC utilize a non-standard wireless communication protocol.
8 . An apparatus for accelerated error testing for wireless battery management systems, the apparatus comprising a computer processor, a computer memory operatively coupled to the computer processor, wherein within the computer memory are disposed computer program instructions that, when executed by the computer processor, cause the apparatus to:
provide at least one interference profile representing one or more interference signals for testing a battery management system (BMS), wherein the BMS includes a wireless network controller (WNC) and at least one battery module monitoring system (MMS) configured for wireless communication with the WNC;
broadcast, during a test of the BMS, the one or more interference signals generated from the at least one interference profile;
record packet reception data for the WNC during the test, wherein the packet reception data is based on packets wirelessly received by the WNC from the battery MMS; and
determine, based on the packet reception data, a packet error rate (PER) of the WNC for the at least one interference profile during the test.
9 . The apparatus of claim 8 wherein recording packet reception data for the WNC during the test includes:
recording packet reception data during a first sampling period;
adjusting a signal power of the one or more interference signals; and
recording packet reception data during a second sampling period; and
wherein determining a PER of the WNC for the at least one interference profile during the test includes determining a first PER of the WNC for the first sampling period and determining a second PER of the WNC for the second sampling period.
10 . The apparatus of claim 8 , wherein recording packet reception data for the WNC during the test includes:
recording packet reception data during a first sampling period;
adjusting a signal power of transmission from the battery MMS to the WNC; and
recording packet reception data during a second sampling period;
wherein determining a PER of the WNC for the at least one interference profile during the test includes determining a PER of the WNC for the first sampling period and determining a PER of the WNC for the second sampling period.
11 . The apparatus of claim 8 , wherein recording packet reception data for the WNC during the test is carried out while the battery MMS is rotated.
12 . The apparatus of claim 8 further comprising computer program instructions that cause the apparatus to generate the at least one interference profile representing one or more interference signals for testing the BMS.
13 . The apparatus of claim 8 , where an orientation of the battery MMS within a battery pack is inverted such that an antenna of the battery MMS is oriented away from the WNC.
14 . The apparatus of claim 8 , wherein the at least one interference profile emulates a standard wireless communication protocol, and wherein the battery MMS and WNC utilize a non-standard wireless communication protocol.
15 . A system for accelerated error testing for wireless battery management systems comprising:
a battery management system (BMS) comprising:
at least one battery module monitoring system (MMS) configured to transmit battery sensor data over a wireless communication link;
and a wireless network controller (WNC) configured to receive the battery sensor data from the at least one battery MMS; and
a test unit for testing the BMS, the test system configured to:
provide at least one interference profile representing one or more interference signals for testing a battery management system (BMS);
broadcast, during a test of the BMS, the one or more interference signals generated from the at least one interference profile;
record packet reception data for the WNC during the test, wherein the packet reception data is based on packets wirelessly received by the WNC from the battery MMS; and
determine, based on the packet reception data, a packet error rate (PER) of the WNC for the at least one interference profile during the test.
16 . The system of claim 15 wherein recording packet reception data for the WNC during the test includes:
recording packet reception data during a first sampling period;
adjusting a signal power of the one or more interference signals; and
recording packet reception data during a second sampling period; and
wherein determining a PER of the WNC for the at least one interference profile during the test includes determining a first PER of the WNC for the first sampling period and determining a second PER of the WNC for the second sampling period.
17 . The system of claim 15 , wherein recording packet reception data for the WNC during the test includes:
recording packet reception data during a first sampling period;
adjusting a signal power of transmission from the battery MMS to the WNC; and
recording packet reception data during a second sampling period; and
wherein determining a PER of the WNC for the at least one interference profile during the test includes determining a PER of the WNC for the first sampling period and determining a PER of the WNC for the second sampling period.
18 . The system of claim 15 , wherein the system further comprises a rotatable test platform for rotating the battery MMS while the test is carried out.
19 . The system of claim 15 , wherein the test unit is further configured to generate the at least one interference profile representing one or more interference signals for testing the BMS.
20 . The system of claim 15 , where an orientation of the battery MMS within a battery pack is inverted such that an antenna of the battery MMS is oriented away from the WNC.