How To Test EV Battery

Testing electric vehicle (EV) batteries is a complex process that involves multiple aspects to ensure battery performance, safety and compliance. The following are some of the key steps and methods used to test EV Li-ion batteries:

1. Performance testing:

– Includes Cycle Life Tests, Calendar Life Tests, Reference Performance Tests, and Module Controls Verification Tests.

2. Peak Power Tests:

– Peak Power Test (Peak Power Test) is used to determine the maximum power output capability of the battery under different conditions.

3. Safety Test:

– Tests the battery’s response under extreme conditions such as overcharging, over-discharging, short-circuiting, thermal runaway, etc. to ensure the safety performance of the battery.

4. Environmental Test:

– Expose the battery to environmental conditions such as extreme temperature, humidity, vibration and corrosion to simulate the environmental effects of actual use.

5. Communication Test:

– Verify the communication between the Battery Monitoring Controller (BMC) and the Cell Management Controller (CMC) in the BMS (Battery Management System), including CAN, LIN, SPI and other protocols.

6. Compliance Testing:

– Ensure that the battery complies with international and regional standards such as ISO 16750, ISO 12405, LV 124, etc., which address electrical safety, performance, reliability and abuse testing.

7. UN/DOT 38.3 test:

– This is a global standard that applies to batteries at all points during transportation, including simulated altitude, thermal testing, vibration testing, shock testing, external short-circuit testing, and overcharge testing.

8. UL/ETL certification test:

– Test batteries for compliance with North American standards such as UL 2580, SAE J2929, and UN standards such as UNECE R100 and R136.

9. Battery Simulation and HIL Testing:

– Use emulators to simulate battery cells, and hardware-in-the-loop (HiL) testing to verify BMS performance and communication.

10. Battery Balancing Test:

– Performs battery balance tests to simulate a predefined state of charge (SoC) for each cell.

11. Real-time monitoring and regulation:

– Real-time monitoring of battery cell parameters, such as terminal and open-circuit voltages, charge and discharge currents, state-of-charge (SOC), internal resistance, etc., and fast adjustment of output impedance.

12. Multi-physical quantity test:

– Tests the voltage, current and power capacity of the battery and ensures that the data can be reproduced with high accuracy and reliability.

These tests enable a comprehensive assessment of the performance, safety and reliability of EV batteries, ensuring their reliability and effectiveness under a variety of expected conditions.

Shenzhen Kinglisheng New Energy Eechnology .,Ltd