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Installation precautions for lithium iron phosphate batteries

Before installing the lithium iron phosphate battery pack, the open circuit voltage must be measured, and the open circuit voltage difference cannot exceed 50mV. The battery test must be done well and recorded.

Although lithium iron phosphate battery packs are activated by charging and discharging both positive and negative plates when they leave the factory. If the installation date of the iron phosphate lithium-ion battery pack is far from the factory date, the capacity of the iron phosphate lithium-ion battery pack will inevitably be lost after long-term self discharge. In addition, the iron phosphate lithium-ion battery pack usually has a charge of about 60% when leaving the factory. Therefore, the lithium-ion battery pack should be recharged at the beginning of installation. Moreover, due to the difference in the size of self discharge of individual batteries, it may cause an imbalance in the terminal voltage of each battery.

Before installing the new lithium iron phosphate battery pack, the open circuit voltage must be measured and battery test records must be kept. A false load can be used to conduct capacity tests on battery packs at rates of 0.1C10 (A) and 0.2C5 (A) per hour. This test can also be conducted without connecting to the battery management system, as long as the battery packs are connected in series. However, during the discharge process, the voltage of each battery cell must be strictly checked. During the test, the total voltage, discharge current, and voltage of each battery cell should be measured and recorded every hour, In the later stage of discharge, the battery should be tested every 10 minutes for batteries with low individual voltage. If the terminal voltage of one battery reaches 2.5V, it should stop discharging immediately. Calculate whether the actual discharged capacity of the battery is basically consistent with the rated capacity of the battery. If it is basically consistent, it indicates that the battery discharge test is qualified, and then charge the battery.

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