Analysis of the Importance of Periodic Testing of Battery Internal Resistance

The battery is also like a human to have a regular physical examination, so that the basic condition of the battery, we can do it in our hearts. Battery voltage, current, and temperature are important operating parameters of the battery, but it does not reflect the internal state of the battery.

Battery internal resistance is the most recognized and most convenient performance parameter for batteries. It can reflect the performance indicators such as battery deterioration and capacity status, and these indicators are not reflected by operating parameters such as voltage, current and temperature.

The four main failure modes of the battery: water loss, negative plate vulcanization, positive plate corrosion and thermal runaway have a direct impact on the battery capacity and internal resistance, which is the main reason for the increase in internal resistance of the battery.

As the battery capacity state decreases, the internal resistance of the battery will increase. The larger the capacity of the battery, the smaller the internal resistance is reflected, and as the battery deteriorates, the internal resistance of the battery also increases significantly. Therefore, the internal resistance of the battery has a close relationship with its capacity: the increase in internal resistance of the battery is an important indicator of battery performance degradation.

By performing an internal resistance test on the battery cells in the battery pack, it is possible to accurately grasp the performance state of each of the battery cells in the battery pack. At the same time, it is of great significance to ensure the stability of the battery power supply and extend the service life of the battery pack.

The battery is used in series at most sites. The performance status of the battery directly affects the overall performance of the battery pack. At the same time, the backward battery in the battery pack will accelerate the degradation rate of other batteries connected in series. Therefore, the monitoring of the single battery is a necessary condition for ensuring the capacity status and service life of the battery pack.

The quality of the single battery directly affects the performance of the overall battery pack, which is the so-called one-shot movement. Qunling Energy is a company dedicated to battery maintenance testing!

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