The Battery Pack 'EOL' Test Method
Semco Infratech Pvt Ltd
Lithium Battery Testing & Manufacturing Equipments Supplier ? Turnkey Automated/Semi-Automated Assembly Line
Turn off the BMU insulation monitoring function and use the Hipot tester to measure the insulation resistance between the main positive, main and negative and charging positive of the battery pack and the box, and the resistance value should meet the requirements.
2. AC and DC withstand voltage test
Turn off the BMU insulation monitoring function, and use the Hipot tester to perform the following tests on the battery pack main positive, main and negative and charging positive chassis:
3. CAN termination resistance test
The multifunction multimeter is enabled via EOL software to measure the resistance value of the CAN port.
4. Insulation testing function test
By changing the insulation resistance values of battery HV+ and HV- to ground (connected to 1000kΩ, 500kΩ, 100kΩ), read the insulation resistance and alarm status reported by the BMS.
5. Vehicle communication function test
When the Keyon is closed, connect the vehicle CAN, and check whether the total voltage, current, maximum and minimum voltage of the battery pack is normal through the EOL host computer software.
6. Internal communication function test
When the Keyon is closed, connect the internal CAN and check whether the cell temperature and cell voltage of the battery pack are normal through the EOL host computer software.
7. Charging communication function test (fast charging)
8. Total voltage accuracy test
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The detected value of the output voltage of the battery system is compared with the total voltage acquisition value of BMS and the accumulated value of the monomer voltage.
9. Open circuit voltage test
The charging relay is closed via EOL software, and the port voltage is measured with a multifunction multimeter.
10. Charge and discharge circuit test
The specified (main/main/negative, charging) relay is closed and disconnected by BMS, and the multi-function multimeter is used to detect the port voltage value when the relay is closed and disconnected, and the normal voltage value indicates the normal operation of the charging and discharging circuit.
11. Pre-charge relay on-off test
The pre-charge relay and the charging relay are closed sequentially by BMS, and the multi-function multimeter is used to detect the port voltage values U1, U2, and U1/U2 of the battery pack in the two states to meet the requirements.
12. Heating circuit resistance test
Use a multi-function meter to detect the resistance of the heating plug connector.
13. High voltage interlock
The on-off of the high-voltage interlocking signal line is controlled by EOL, and the corresponding status of the BMS is read through CAN communication.
About Semco?-?Established in 2006,?Semco Infratech?has secured itself as the number 1 lithium-ion battery assembling and testing solutions provider in the country. Settled in New Delhi, Semco gives turnkey solutions for lithium-ion battery assembling and precision testing with an emphasis on Research and development to foster imaginative, future-proof products for end users.
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1 年This article has captivated my attention.
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