Lithium battery capacity testing method have?

Source: 2020 - 03 - 26 times hits: first lithium battery capacity testing method of pool capacity and the battery discharge function juniper measuring methods together, the determination methods of continuous discharge current, constant resistance discharge method, constant pressure discharge method, constant voltage and constant current discharge method, continuous discharge and discharge between 歜 method, etc. Method of constant current circuit, the method has the advantage of stable current discharge process, the capacitor calculation convenient. The discharge capacity of the constant-current method is closely related to the discharge current. Under the same discharge standards, different charging standards for battery charging efficiency is different, so the battery discharge capacity will also be different. Constant resistance test capacity discharge during the process of discharge current is not constant. Discharge begins with a large current, and then decrease. And discharge current the an is larger, the smaller the discharge current, the resulting voltage drop is smaller, the slower running voltage drop, relatively flat discharge curve, the greater the discharge capacity. Testing: different models, different degree of old and new battery can't use, lest caused by battery capacity does not match the overcharge and over discharge. In addition, in a battery pack, its overall function is generally determined by the function of the worst battery. To a battery capacity test may be destructive, so only through strict control of the production, the product to stay together. For secondary battery, in addition to the strict production process control, but also a separation test, to ensure the capacity of the battery. Separation of the so-called, is the size of the capacity of the battery must demand 逬 line size differences. Sorting test can be divided into two kinds of, ability distinguishing characteristics and distinguishing. Sorting feature ordering is also called the curve, it is on the basis of the sorting capacity expansion. Sorting is the battery capacity by capacity range, and under the premise of available features are at full capacity, according to the different voltage characteristic to distinguish between 1000 ~ halo scope the battery. Secondary battery sorting is accomplished by controlling the accounting machine commonly, most active sorting machines are equipped with the corresponding software, can easily do this. In general, the manual sorting equipment can only meet the needs of capacity sorting, but not to have the characteristics of the sorting, even in the case of capacity for sorting, also requires a lot of manpower to complete, and more expensive to operate. Most of the secondary battery manufacturers now use active sorting equipment for sorting operation. Sorting conditions set by computer and sent to the equipment.