What Battery Test Needed Before Factory
Description
Lithium battery packs need to undergo comprehensive test before leaving the factory to ensure safety, performance, and reliability,the following are normal testing items:
1. Basic performance test
1.1 Capacity and energy testing
Verify the rated capacity and energy output of the battery pack under standard conditions to ensure compliance with design specifications.
1.2 Charge and discharge efficiency test
Calculate the energy loss during the charging and discharging process and evaluate the overall efficiency of the battery pack.
1.3 Internal resistance test
Check the internal resistance of the battery pack, identify poor connections or abnormalities in individual batteries.
1.4 Discharge platform testing
Observe the voltage stability during the discharge process and determine the overall performance of the battery pack.
2.Safety testing
2.1 Overcharge/Overdischarge Protection Test
Verify whether the BMS (Battery Management System) can promptly cut off the circuit when the voltage exceeds the threshold.
2.2 Short circuit test
Simulate external short circuit, test the thermal stability of battery pack and the effectiveness of protection mechanism.
3.BMS functional testing
3.1 SOC/SOH estimation verification
Verify the accuracy of remaining charge (SOC) and state of health (SOH) estimates.
3.2 Balance function test
Check whether the voltage balance of individual batteries is effective and ensure consistency.
3.3 Communication and fault alarm testing
Test the communication stability between BMS and external devices like inverter, and verify the fault alarm function.
4.Conformance testing
Screen the voltage, internal resistance, capacity and other parameters of the grouped batteries to ensure that the individual performance differences are within the allowable range.
5.Conclusion
Through the above test, it can be ensured that the lithium battery pack meets the following requirements at the factory
Safety: No risk of thermal runaway or short circuit;
Performance standards: Capacity, efficiency and other parameters meet the design requirements;
Reliability: Suitable for actual usage environment, stable lifespan;
Consistency: Matching the performance of grouped batteries to extend their overall lifespan.