Battery internal resistance measurement method you understand?
In recent years, with the sustained and rapid development of the economy, electric power, communications, computers and other basic industries are developing very rapidly, these industries are in a period of high growth, the growing demand for batteries. Do you understand the measurement method of battery internal resistance, please listen to the pool traveling thousands of miles of the next editorial!
In the electric power, communications and other industry applications, the accurate measurement of battery internal resistance is carried out through specialized equipment. The following is a general application of the industry's battery internal resistance measurement method. Internal resistance is an important technical indicator to measure the performance of the battery.
Under normal circumstances, the battery with small internal resistance has a strong high-current discharge capacity, while the battery with large internal resistance has a weak discharge capacity. When the battery is in different power state, its internal resistance value is different; when the battery is in different service life state, its internal resistance value is also different.
01 DC internal resistance test method
DC internal resistance method is a measurement method to get the internal resistance of the battery by discharging the battery according to a certain current and measuring the voltage drop at both ends of the battery.
One of the most common portable pointer internal resistance measurement table, is the simplest of a power resistor discharge, see the battery voltage drop to characterize the internal resistance of the battery.
Another way to characterize the actual internal resistance of the battery is to test the dynamic DC internal resistance of the battery during the stable discharge process, which is the method adopted by our battery management system.
02 AC Internal Resistance Test Method
AC internal resistance method is to measure the voltage feedback of the battery to a certain frequency of AC signal inputted to it, so as to measure the internal resistance of the battery, if this method can be tested at multiple frequency points and in addition to the real part of the internal resistance value, combined with the analysis of the phase difference of the return wave, it will be able to provide a more comprehensive feedback on the internal state of the battery.
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RD- 7000 Battery Impedance Tester is a portable digital measurement device for testing lead acid stationary batteries health and aging condition precisely within seconds. With the help of this device, either single cells / blocks or large/multi group battery banks can be measured within a short time and the precisely measured data are processed and analyzed. with the help of this device, either single cells / blocks or large/multi group battery banks can be measured within a short time and the precisely measured data are processed and reported by given analyzer software automatically.
