Preferred groups to be tested and the battery pack of the respective unit cells of the performance differences still exist between these differences in the battery during long-term operation due to slight differences in the environment (temperature difference) to produce a new type of difference in degrees. After a long run, seriously affect the performance of the battery pack, or even cause an accident and requires early diagnosis of single cell performance degradation and early failure. Alternatively, a single cell performance loss and failure reduces the battery pack SOC (state of charge) values ?? because of poor performance of one monomer determines the battery state of charge of the battery pack. A battery pack is typically composed of several cell or battery modules connected in series; performance backward single battery may cause early termination of the entire battery discharge. Therefore need to be equipped battery fault diagnosis expert system. Diagnostic system can be realized through the battery failures and pitfalls of early warning, which can effectively increase the electric vehicle battery pack continued driving mileage and time between failures, so that maintenance work to a minimum. Electric vehicles from all or part of the energy storage battery. Restricting the development of electric vehicle technology and electric vehicle industry a major problem is the energy storage battery and its application problems. Battery in a prominent problem is the difference between each cell, there is inconsistency, so early detection of inconsistencies and battery failure can be very critical technical problems. Need to develop a battery pack early fault diagnosis system. Through expert diagnostic system, we can achieve early diagnosis of unhealthy cells, but also the remaining capacity estimation model can be more accurate. Dell Studio XPS 1340 battery Dell Studio XPS 1640 battery Dell tc030 battery Dell tk330 battery Dell u011c battery
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