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In the use of rechargeable chemical or physical batteries, the charger is an important device for its successful application, so the charger is a key problem because the charger is directly affected by the two important technical indicators of the battery: 1) the capacity of the rechargeable battery; 2) the battery cycle. The use of the number of times, that is, life. However, until 60s, the charger technology has not been greatly developed. The main methods used are the constant current charging pile or the constant pressure charging pile charging method, and its charging effect is the reality that has to be recognized. Until 60s Dr. Mascc was able to charge the curve based on the minimum outgassing rate.
The starting charge current of a constant current charging pile is always lower than the acceptable capacity of the battery, resulting in low charging efficiency and long charging time, and the final charging current is always higher than the acceptable level of the battery in the later period of charge, so the gas discharge rate inside the battery increases continuously, to the end of the charge, all the charging current. All the supply of gas precipitates, the internal voltage of the battery increases rapidly, and the temperature of the battery rises rapidly, which leads to the loss of active substances on each charge electrode, which greatly reduces the life of the battery.
The voltage limiting charge is in the early stage of charging. The difference between the battery voltage and the charge voltage is too large to make the charging current too large, but it does not decline exponentially with time (often deviating from the formulation curve).
Later, according to the Mascc curve, the so-called two stage, three stage or more stages of charging were also proposed. The so-called two stage charge refers to the constant current or constant voltage charging of the battery, when the battery voltage reaches a certain degree, then the battery is charged with a trickle. The so-called three stage is usually the first constant current charging of the battery, and then the battery voltage reaches the voltage threshold to the second stage, that is, the so-called voltage limiting charging stage, when charged, when charging, when charging, when charging, when charging, when charging, when charging, when charging, when charging, when charging stage, when charging, when charging, when charging stage, when charging, when charging, when charging stage, when charging, when charging, when charging stage, when charging, when charging, when charging stage, when charging, when charging, when charging stage, when charging, when charging stage, when charging, when charging stage, when charging, when charging stage when charging When the electric current reaches a certain level, it changes to the third stage, that is, trickle charging.
Although there are a variety of charging methods and some effect, the most important fact is that the battery does not work in the ideal state, that each battery has its own unique personality, and that each rechargeable battery is different from the other or even the same battery. The discharge curve, even during the charging process, changes dynamically, which means that the good charge control mode should be changed and that it should be the best in accordance with the charge and discharge curve of the battery. In fact, each battery has an optimal charging current and charging mode at any time of charge, and the problem is how we can approach this best value. On the basis of the above reasons, on the basis of a large number of experimental research results mentioned above, we have proposed an adaptive control intelligent fast battery charger control method.