What is the charging time and discharging time of the lithium battery

The basic requirement of a lithium battery charger is a specific charging current and charging voltage, and then ensuring the safe charging of the battery. Other auxiliary charging functions are added to improve the battery life and simplify the operation of the charger, including trickle charging for over-discharged batteries, battery voltage testing, input current limit, turning off the charger after charging is complete, and battery partial discharge Then take the initiative to start charging and so on. Phase 1: Trickle charge Trickle charge is used to pre-charge the fully discharged battery cell (recovery charge). When the battery voltage is lower than about 3V, trickle charging is used. The trickle charging current is one-tenth of the constant current charging current, which is 0.1c (taking a stable charging current of 1A for example, and the trickle charging current is 100mA), stage 2 : Constant current charging When the battery voltage rises above the trickle charge threshold, increase the charging current for constant current charging. The current for constant current charging is between 0.2C and 1.0C. The battery voltage gradually increases with the constant current charging process. Generally, the voltage set for a single battery is 3.0-4.2V. Stage 3: Constant voltage charging When the battery voltage rises to 4.2V, the constant current charging is completed and the constant voltage charging starts. stage. According to the fullness of the battery cell, the continuous charging current following the charging process gradually decreases from the maximum value. When it decreases to 0.01C, the charging is considered to stop. (C is a method of declaring the nominal capacity of the battery against the current. For example, if the battery has a capacity of 1000mAh, 1C is the charging current of 1000mA.) Phase 4: Charge stop There are two typical charging stop methods: use the minimum charging current to determine Or use a timer (perhaps a combination of the two). The minimum current method supervises the charging current in the constant voltage charging stage, and stops charging when the charging current decreases to a scale of 0.02C to 0.07C. The second method starts from the beginning of the constant voltage charging stage, and stops the charging process after continuing to charge for two hours. Generally, the size of the battery capacity is indicated on the battery, in milliamperes, the larger the value, the greater the capacity. For example: 1200mAh means that the capacity of the battery is 1200 mAh. At the same time, the charger is generally also marked with the charging current, also in milliamperes. In this way, the length of the battery charging time can be simply calculated according to the following method: the battery capacity is divided by the charging current, and then multiplied by a factor of 1.2 (or 1.1), and the time unit is hours. For example: the battery capacity is 1200 mA, the charging current of the charger is 600 mA, the charging time is (1200 mA/600 mA) u0026 TImes; 1.2u003d2.4 hours, then the charging time of this battery using this charger is It is 2.4 hours. The above accounting method does not apply to new batteries. Generally speaking, when a new battery is charged for the first three times, especially nickel-cadmium batteries and nickel-metal hydride batteries, the standard charge is about 15 hours (0.1C), so that the battery can be used at the maximum time. In the future, you can refer to the above method to calculate the battery charging time. What is the charging current marked on the charger? I can give you a simple formula: charge and discharge time (minutes) u003d capacity * 1.1 / current (mA) * 60. The relationship between battery charging time and charging current is the battery capacity divided by the charging current to get the charging time, considering the loss in the charging process , So multiply the calculated charging time by the constant of 1.1 or 1.2. According to the logo, you can calculate an approximate moment. If it is a normal charger, and the current is very small, the charging time must be very long. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the important differences between lead-carbon batteries and lithium batteries