Wireless BMS Test Bench Addressing for Accurate Unit Identification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In off-the-production-line testing of wireless communication Battery Management Systems (BMS) for new energy vehicles, the inability to accurately identify and distinguish individual electronic control units leads to high test failure rates and reduced efficiency due to the lack of unique connections in wireless communication setups.
Innovation Solution
A method involving the use of fixed physical connections and distinct analog signals to establish unique address information for each electronic information acquisition unit, enabling accurate wireless communication and data transmission by converting working voltages into different analog signals through resistor combinations, and employing address detection modules to prevent crosstalk.
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 individual units is lost
Solution Approach 1:
The system performs preliminary addressing by sending first analog signals to electronic information acquisition units before wireless communication testing begins. This preliminary action establishes unique address information for each unit, enabling accurate identification during subsequent wireless communication tests without requiring complex physical harness connections.
Solution Approach 2:
The patent introduces an intermediary addressing mechanism that mediates between the wireless communication system and multiple electronic control units. By using analog signals to carry address information and a test bench with addressing capabilities, the system creates an intermediate layer that enables precise identification of individual units despite their wireless connectivity, resolving the contradiction between wireless simplicity and identification precision.
2Productivity
If multiple electronic control units are tested simultaneously through wireless communication, then production efficiency is improved, but test accuracy decreases due to connection confusion
Solution Approach 1:
Before simultaneous wireless testing of multiple electronic control units, the system performs preliminary addressing by sending analog signals to each unit to establish unique address information. This preliminary action enables the test bench to accurately identify and distinguish between multiple units during simultaneous testing, maintaining test accuracy while improving production efficiency through parallel testing capability.
Solution Approach 2:
The patent applies local quality by providing each electronic information acquisition unit with unique address information through individual analog signal assignment. This local differentiation enables the test bench to selectively address and test specific units among multiple simultaneously connected devices, ensuring test accuracy is maintained even when testing multiple units in parallel, thus resolving the contradiction between productivity and reliability.
3Measurement precision
If analog signals with different voltages are assigned to different units, then unit identification is improved, but signal crosstalk may occur
Solution Approach 1:
The test bench serves as an intermediary that receives analog signals from the electronic information acquisition units and processes them to extract address information. This intermediary role allows the system to use voltage-level analog signals for identification while the test bench's addressing logic prevents crosstalk by correctly interpreting and routing signals to the appropriate units, thus maintaining identification precision without suffering from crosstalk issues.
Solution Approach 2:
The patent uses parameter changes by assigning different voltage levels to analog signals to encode address information for different electronic control units. This method enables precise unit identification through voltage differentiation. The system manages potential crosstalk by using controlled voltage levels and appropriate signal processing in the test bench, transforming the potential harmful effect of multiple signals into a useful identification mechanism.
Data Source
AI summary
An off-the-production-line test method, apparatus, and system for a wireless communication battery management system (BMS) are provided. 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.