Use a multimeter to make a preliminary judgment on the quality of lithium batteries

　　There is a special lithium battery measuring instrument for judging the quality of lithium batteries, but the average user rarely has this kind of instrument, and there is only a multimeter.

　　The following points are a preliminary method for judging the quality of lithium batteries with a multimeter.

　　Observe whether the appearance is deformed, bulging, leaking, cracked, scorched, scorched, and if there is oxide seepage at the screw connection, etc.

　　When charging online, use a multimeter to measure the voltage of each battery. If the voltage details are too high, there is a problem, so focus on measurement.

　　When discharging online, use a multimeter to measure the voltage of each battery. If the voltage is obviously too low, there is a problem, so focus on measurement.

　　If the voltage change is not obvious, after 8 hours of charging, the system works in battery mode with a certain amount of load. If the discharge time is significantly shorter than the normal discharge time, the battery is preliminarily judged to be aging.

　　Using a multimeter to judge the quality of lithium batteries can only get a qualitative analysis, and the need for quantitative analysis also requires the cooperation of professional instruments.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.