Wireless BMS Interference Profile Testing for Packet Error Reliability
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Solution Overview
Problem
Vehicle sensor systems face challenges in determining the reliability of wireless communication, leading to unnecessary safe operating states due to potential hardware failures or interfering signals, which can be costly and inconvenient, and require time-consuming testing to minimize data error rates.
Innovation Solution
A method and apparatus for accelerated error testing of wireless battery management systems that generate and broadcast interference profiles to simulate interfering signals, record packet reception data, and determine packet error rates, enabling the BMS to maintain functionality even in the presence of interfering signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional error testing methods are used to determine wireless communication reliability, then statistically meaningful test data can be obtained, but the testing process is time-consuming and requires substantial effort
Solution Approach 1:
The patent applies preliminary action by pre-generating comprehensive interference profiles that cover various signal conditions, noise levels, and interference scenarios before actual testing begins. These pre-prepared interference profiles are stored in a database and can be rapidly applied during testing, eliminating the need to create and calibrate interference conditions in real-time during the testing process
Solution Approach 2:
The patent utilizes parameter changes by systematically varying multiple parameters including signal strength, noise levels, interference patterns, and communication protocols across different test scenarios. By changing these parameters in controlled ways and using pre-generated interference profiles, the system can efficiently evaluate wireless communication reliability under diverse conditions without requiring extensive testing time for each individual parameter configuration
2Reliability
If the BMS places the vehicle into a safe operating state upon communication loss, then vehicle safety is ensured, but unnecessary safe operating states occur due to temporary interfering signals
Solution Approach 1:
The patent applies preliminary anti-action by using accelerated error testing with various interference profiles to identify and characterize temporary interfering signals before they cause operational issues. The testing process distinguishes between transient interference and permanent faults, enabling the BMS to develop discrimination capabilities that prevent premature safe operating state activation while maintaining vehicle safety
Solution Approach 2:
The patent implements feedback mechanisms where test results from accelerated error testing are used to refine the BMS's decision-making algorithms. The system continuously learns from test data about the characteristics of temporary interfering signals versus actual faults, improving its ability to differentiate between these conditions and make accurate decisions about whether to activate safe operating states, thereby reducing unnecessary vehicle shutdowns
3Reliability
If extensive testing is performed to minimize data error rates, then communication reliability is improved, but the testing effort and complexity increase substantially
Solution Approach 1:
The patent applies copying by creating virtual representations of various interference scenarios and communication conditions through pre-generated interference profiles. Instead of requiring physical replication of complex interference sources and test environments, the system uses software-based copies of interference patterns that can be rapidly deployed and modified, significantly reducing the complexity of the physical testing infrastructure while maintaining comprehensive test coverage
Solution Approach 2:
The patent implements universality by designing a multi-functional testing system that can evaluate multiple communication protocols, signal types, and interference conditions using a single integrated platform. The interference profile database and automated testing framework provide universal capabilities that eliminate the need for separate specialized test equipment for each scenario, reducing overall system complexity while enabling extensive testing
Data Source
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AI summary
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.