In the process of recycling, sorting and secondary utilization of used lithium batteries, a core question often arises: How much power is left in the battery? Measuring the remaining power is not only about getting accurate data, but also a key step to evaluate the battery value and ensure operational safety. Today, we will share practical and reliable methods to test the power of used lithium batteries.
Many people simply judge the power by voltage, which is not accurate for used batteries. After long-term use and storage, used lithium batteries may suffer from virtual high voltage, increased internal resistance and serious capacity attenuation, so voltage alone can easily lead to wrong judgment. A reliable test requires a combination of methods.
The most common and convenient method is to measure the open-circuit voltage with a multimeter, suitable for quick on-site screening. The voltage of a rested battery can roughly distinguish full power, medium power and low power states, facilitating batch sorting. However, this method only provides a preliminary reference and cannot represent the actual available capacity.
For accurate judgment of remaining power, the charge-discharge capacity test is the most reliable solution. Through professional equipment, conduct standard charge and discharge on the battery, record the actual released capacity, and calculate the real health status of the battery. This is also an important basis for the recycling industry to evaluate battery value. For large-scale recycling, battery internal resistance and voltage analyzers can be used to measure voltage, internal resistance and health status at once, with higher efficiency and more stable data.
No matter which method is used, safety always comes first. Batteries with bulging, liquid leakage, deformation or overheating must be prohibited from testing and charging-discharging. Avoid short circuits during measurement, and ensure the operating environment is fireproof, explosion-proof and ventilated. Only on the premise of safety can accurate power testing better realize the classification and recycling of used lithium batteries, turning waste into treasure.
Testing the power of used lithium batteries with proper methods and standardized operations can improve recycling efficiency and maximize safety and value, which is a scientific and practical treatment.
