Wireless BMS End-of-Line Testing With Unique Unit Addressing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In off-the-production-line testing of wireless communication Battery Management Systems (BMS) for new energy vehicles, existing test benches struggle to accurately identify and connect to specific electronic control units due to high failure rates and bit errors, resulting in reduced test passing rates and efficiency.
Innovation Solution
An off-the-production-line test method involving the use of fixed physical connections and unique analog signals to establish distinct address information for each electronic information acquisition unit, enabling accurate wireless communication and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wireless communication is used to connect multiple electronic control units, then harness complexity is reduced, but the ability to accurately identify and distinguish specific units during testing deteriorates
Solution Approach 1:
The system segments the identification process by assigning unique address information to each electronic control unit. The test bench divides the testing process into addressing phase and data testing phase, allowing precise identification of individual units even when multiple units are connected via wireless communication.
Solution Approach 2:
Address information acts as an intermediary between the test bench and electronic control units. This intermediary mechanism enables the test bench to accurately identify and communicate with specific units during testing, resolving the ambiguity inherent in wireless multi-unit connections.
2Productivity
If multiple electronic control units are tested simultaneously through wireless communication, then testing efficiency is improved, but the ability to determine data source and unit position deteriorates
Solution Approach 1:
The system performs preliminary addressing before actual data testing. Each electronic control unit is pre-assigned and acknowledges its unique address information, establishing clear identification before simultaneous testing begins. This preliminary action ensures that even when multiple units are tested concurrently, their data sources remain distinguishable.
Solution Approach 2:
The system implements feedback mechanisms where electronic control units respond to addressing information and confirm their identities. This feedback loop ensures that the test bench can verify and track which unit is transmitting which data, maintaining data source identification during efficient simultaneous testing.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The present disclosure provides an off-the-production-line test method, apparatus, and system for a wireless communication battery management system (BMS). The method includes: sending first analog signals in a one-to-one correspondence with a plurality of electronic information acquisition units of a BMS to the plurality of electronic information acquisition units through physical connection lines such that the plurality of electronic information acquisition units generate respective first address information; sending addressing information to the plurality of electronic information acquisition units, and establishing wireless communication with the plurality of electronic information acquisition units after the plurality of electronic information acquisition units respond to the addressing information; and receiving to-be-tested battery information uploaded by the plurality of electronic information acquisition units, and determining the electronic information acquisition unit corresponding to each piece of to-be-tested battery information based on the respective first address information of the plurality of electronic information acquisition units. Through the apparatus in the embodiments of the present disclosure, the electronic information acquisition unit establishes wireless communication with the test apparatus through unique first address information, to prevent crosstalk problems that a position of the electronic information acquisition unit cannot be determined and a source of the to-be-tested battery information cannot be distinguished.