Precautions For Battery Installation

When lithium iron phosphate batteries are first manufactured, their positive and negative plates are activated by charging and discharging. However, if these batteries are not installed immediately, their self-discharge capacity may decrease over time. Furthermore, since these batteries are typically charged to only 60% when leaving the factory, they should be fully recharged upon initial installation to balance the voltage of each battery terminal.

To ensure the quality of lithium iron phosphate battery packs, certain tests must be performed before and after installation. The open circuit voltage must be measured before installation to make sure that the battery cells are balanced and that the voltage difference between them is not greater than 50 mV. In addition, a capacity test can be conducted using a dummy load at 0.1C10 and 0.2C5. This test requires measurements of the total voltage, discharge current, and battery cell voltage of each battery in the pack, as well as a record of these values every hour during the discharge process.

As the discharge process continues, the voltage of each battery cell should be closely monitored to prevent any potential problems. If any battery in the pack displays a voltage of 2.5 V, the discharge should be stopped immediately. After the discharge test is complete, the actual discharged capacity of each battery should be compared to the rated capacity to determine if they are consistent. If they are within 15% of each other, the battery pack can be charged. However, if there is a significant difference in capacity, the manufacturer should be contacted for further investigation and handling.

Overall, lithium iron phosphate battery packs require careful testing and monitoring to ensure their proper functioning and longevity. Proper installation, voltage balancing, and discharge testing are essential steps in this process.