Study on the Integration Strategy of Online EOL Testing of Pure Electric Vehicle Power Battery
Abstract
:1. Introduction
- (1)
- By conducting a detailed investigation of the EOL test, the typical test content of EOL is divided into two categories. The content and qualification standards of the EOL test are sorted out, and the integration strategy of the EOL test is separately studied.
- (2)
- A detailed interpretation of various message mechanisms of the Unified Diagnostic Services (UDS) protocol in BMS testing, including single-frame message, multi-frame message, NRC and DTC, and the possibility of automatic analysis and integration are studied.
- (3)
- The concept of including the electrical performance detection in the integration research is proposed. The working principle and control method of the power relay in the power battery are studied. The specific content and method of electrical performance detection are fully displayed, including some program control methods for the electrical performance detection equipment.
- (4)
- The applicability of LabVIEW and Python in this article is compared and the possibility of using Python language and its rich library resources as an integrated strategy development tool is analyzed.
2. EOL Testing Content and Criteria
3. BMS Detection
3.1. BMS Data Reading Based on UDS Protocol
3.2. BMS Fault Code Reading and Processing
4. Electrical Performance Testing
4.1. General Electrical Performance Testing
4.1.1. Relay Function Detection of Power Battery
4.1.2. Power Battery Voltage Measurement
4.2. Electrical Safety Performance Testing
4.2.1. Electrical Safety Testing Content
4.2.2. Remote Control of Safety Testing Equipment
5. Detection Software Design
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Test Type | Test Items | Testing Equipment | Qualification Criteria |
---|---|---|---|
BMS testing | Communication status detection | Diagnostic test equipment | Received message |
SOC | 100% | ||
SOH | 100% | ||
Battery temperature | Air temperature ±5 °C | ||
DTC Reading | DTC data is normal | ||
Electrical performance testing | Battery relay detection | Diagnostic test equipment | Relay control is normal |
Battery relay electrical function testing | Diagnostic test equipment | All electrical status of the battery is normal | |
Battery voltage detection | Digital Multimeter | 60–1500 V | |
Withstand voltage test | Insulation withstand voltage tester | Leakage current shall not be higher than 1 mA | |
Potential equalization test | Equipotential Tester | Impedance not greater than 0.1 Ω | |
Insulation performance test | Insulation withstand voltage tester | Greater than or equal to 100 Ω/V |
High-Voltage Measurement Method | Limitations |
---|---|
Partial pressure method | Requires current limitation in the mA class |
High-Voltage Static Voltmeter | Small measurement range and high cost for high voltage |
Ball gap method | Low accuracy, susceptible to interference, large size |
Serial Number | Direct Measurement Voltage/V | Indirect Measurement Voltage/V | Voltage Read by BMS |
---|---|---|---|
1 | 408.1 | 410.0 | 408.0 |
2 | 408.3 | 408.0 | 408.0 |
3 | 407.8 | 410.0 | 408.0 |
4 | 408.0 | 408.0 | 408.0 |
5 | 408.0 | 408.0 | 408.0 |
6 | 408.2 | 408.0 | 408.0 |
Average | 408.1 | 408.7 | 408.0 |
Serial Number | Withstand Voltage Test/mA | Potential Equalization Test/mΩ | Insulation Performance Test/(Ω/V) |
---|---|---|---|
1 | 0.18 | 2.2 | 14,311 |
2 | 0.22 | 2.4 | 14,350 |
3 | 0.211 | 2.3 | 14,089 |
4 | 0.21 | 2.6 | 13,931 |
5 | 0.19 | 2 | 14,450 |
6 | 0.22 | 2.2 | 14,266 |
Average | 0.205 | 2.28 | 14,232.83 |
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Wang, H.; Qin, H. Study on the Integration Strategy of Online EOL Testing of Pure Electric Vehicle Power Battery. Sensors 2023, 23, 5944. https://doi.org/10.3390/s23135944
Wang H, Qin H. Study on the Integration Strategy of Online EOL Testing of Pure Electric Vehicle Power Battery. Sensors. 2023; 23(13):5944. https://doi.org/10.3390/s23135944
Chicago/Turabian StyleWang, Huazhang, and Hang Qin. 2023. "Study on the Integration Strategy of Online EOL Testing of Pure Electric Vehicle Power Battery" Sensors 23, no. 13: 5944. https://doi.org/10.3390/s23135944
APA StyleWang, H., & Qin, H. (2023). Study on the Integration Strategy of Online EOL Testing of Pure Electric Vehicle Power Battery. Sensors, 23(13), 5944. https://doi.org/10.3390/s23135944