Lithium battery life is better or good in the number of cycles?

　　How long can the lithium battery be used to use the performance, the industry stipulates that it is defined by the number of cycles. However, in fact, the user's use method is ever -changing, because the tests of different conditions are not comparable. If there is a comparison, the definition of the cycle life must be regulated. The national standard stipulates the cycle life test conditions and requirements of the lithium battery: The charging system of the constant current and constant voltage method of 1C is charged for 150 minutes under the temperature conditions of 25 degrees. When the test end is over 36 minutes, the test ends, and the number of cycles must be greater than 300 times. In fact, the number of cycles of lithium batteries, in addition to the different user usage methods, is also related to the production technology level and material formula of lithium battery manufacturers.

　　Lithium battery pack: This definition stipulates that the test of the cycle life is conducted in a deep and deep way. It stipulates that the capacity must be more than 300 after the cycle life is implemented in accordance with this mode. The number of cycles is very different. For example, the above conditions are unchanged. Only the constant voltage voltage of 4.2V to 4.1V has a constant voltage voltage test on the same model. Methods, the last test of the cycle life can be increased by nearly 60%. Then if the dead voltage is increased to 3.9V for testing, the number of cycles should be several times.

　　It is meaningless to put aside the number of cycles in the rules, because the number of cycles is a means to detect the life of the battery, not the purpose! Misunderstanding: Many people like to use the mobile phone lithium -ion battery to automatically shut down and then charge. This is completely unnecessary. In fact, it is impossible for users to use the battery according to the national standard test mode. No mobile phone will shut down in 2.75V, and its discharge mode is not a large current constant flow electricity, but the pulse discharge of GSM The way.

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