Lithium Battery Pack Test: One Week of Lessons Learned
After a week of using a lithium battery pack for power, the author shares their experience. The charging efficiency of the lithium battery pack is very high, and the discharge voltage drops slowly and predictably. In the test, a 1200W vacuum cleaner load did not cause overheating. However, after five consecutive nights of power supply, the voltage of one battery pack dropped sharply. The reason was inconsistencies in capacity due to differences in the number of cells in each pack; packs with fewer cells showed greater capacity increase at lower C-rates. The author solved the problem by adding cells and rebalancing, concluding that slight imbalances are acceptable as long as the packs don't reach their extreme charge or discharge limits.
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