How long does it take to charge a low-temperature lithium battery for the first time

    The specific charging time for low-temperature lithium batteries may be determined based on the actual battery capacity. Low temperature lithium batteries can be fully charged after a single charge, and do not necessarily have to be charged for 12 hours. The original low-temperature lithium batteries were different from those used in old phones, and could be fully charged in about 2-4 hours. Low temperature lithium batteries are calculated based on the number of charges. The charging time should be controlled within 5-6 hours to fully charge the battery.

    At the beginning, the charging speed of individual low-temperature lithium batteries was not fixed and needed to be determined based on variables such as the battery's own capacity, the current of the charger, and the conversion power of charging; If your battery capacity is large and the current of your charger is small, the input current that cannot be reached will slow down the charging speed.

    The capacity of a battery is expressed in mAh (milliampere hour), which refers to the discharge rate of how many milliampere hours it discharges, and may mean discharging for one hour. A 1500mAh battery may take one hour to discharge at a discharge rate of 1500mAh, and it takes three hours to discharge at a rate of 500mA (500mA).

    Individual low-temperature lithium batteries are charged with a current set between 0.2C and 1C. The higher the current, the faster the charging, and the greater the heat generated by the battery. Moreover, excessive current charging may result in insufficient capacity, as the electrochemical reactions inside the battery require time.

    In the application of low-temperature lithium batteries, it should be noted that after a period of time, the battery enters a sleep state, and the capacity is lower than the abnormal value, and the application time is also shortened accordingly. But low-temperature lithium batteries are easy to activate, only through 3-5 cycles of abnormal charging and discharging can the battery be activated and its abnormal capacity be restored.

    How to calculate the charging time of lithium batteries? The actual charging time of lithium batteries is the ratio of the nominal capacity of the battery to the current: low-temperature lithium battery charging time (h)=battery capacity (mAh) ÷ charging current (mA). Low temperature lithium battery charging time=battery capacity ÷ charging current × 1.6, and so on. Based on the proportion of charging current to battery capacity, the coefficient for calculating the charging time of low-temperature lithium batteries is 1.5 (5%<charging current ≤ 10%) 1.3 (10%<charging current ≤ 15%) 1.2 (15%<charging current ≤ 20%) 1.1 (20%<charging current). The charging time of low-temperature lithium batteries is related to the capacity of low-temperature lithium batteries and the charging current: the calculation formula is as follows: charging time t=battery capacity c/charging current i.

    So, assuming the battery capacity is 2000MAH and the charging current is 800MAH, the actual charging time with a charger is 2.5 hours (2000/800); But in practice, the charging time is longer than the actual time because there is energy consumption during charging. The increase in charging voltage may advance the charging power.

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