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Look at the power of lithium battery component performance!

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Look at the power of lithium battery component performance!

Date of release:2019-02-26 Author: Click:

(1) open circuit voltage of power lithium battery


(2) internal resistance of power lithium battery


(3) operating voltage of lithium battery


(4) charging voltage charging voltage refers to the voltage at both ends of the secondary power lithium battery when the external power supply is added to the battery during charging. The basic methods of charging are constant-current charging and constant-voltage charging. Constant current charging is generally adopted, which is characterized by constant charging current during the charging process. With the charging process, the active material is recovered, the electrode reaction area is continuously reduced, and the polarization of the motor is gradually increased.


(5) capacity of power lithium battery the capacity of power lithium battery refers to the amount of electricity obtained from the power lithium battery, which is commonly represented by C, and the unit is commonly represented by Ah or mAh. Capacity is an important indicator of the electrical performance of dynamic lithium batteries. The capacity of power lithium battery is usually divided into theoretical capacity, practical capacity and rated capacity. The capacity of a power lithium battery is determined by the capacity of the electrodes.




(6) storage performance and life of lithium power battery one of the main characteristics of chemical power supply is that it can release electric energy when in use and can store electric energy when not in use. The so-called storage performance for secondary power lithium battery is the ability to maintain charging. For secondary power lithium battery, the service life is an important parameter to measure the performance of power lithium battery. Secondary power lithium battery after a charge and discharge, known as a cycle (or has this cycle). Under a certain charging and discharging system, the number of charging and discharging times that a power lithium battery can withstand before its capacity reaches a certain specified value is called the service cycle of the secondary power lithium battery. Lithium ion power lithium battery has excellent storage performance and long cycle life.


(7) the protection circuit is composed of two field effect tubes and special protection integrated block S--8232. The overcharge control tube FET2 and over discharge control tube FET1 are connected in series in the circuit. The protection IC monitors and controls the voltage of the power lithium battery. In order to prevent misoperation, delay capacitance is usually added to the external circuit. When the power lithium battery is in the state of discharge and the voltage of the power lithium battery drops to 2.55v, the overdischarge control tube FET1 is cut off and the power supply to the load is stopped. The over-current protection is designed to stop discharging to the load by controlling the FET1 to stop when there is a large current flowing through the load. The purpose is to protect the power lithium battery and field effect tube. Overcurrent detection is to monitor the voltage drop of the fet by using the on resistance as the detection resistance, and stop discharging when the voltage drop exceeds the set value. Delay circuit is usually added in the circuit to distinguish the inrush current and short circuit current. The circuit has perfect functions, reliable performance, but strong professional, and dedicated chip is not easy to buy, amateurs are not easy to copy. Because overcharge or overdischarge of lithium ion power lithium battery may cause explosion and cause personal injury, safety is the main concern when using this kind of power lithium battery. Therefore, commercial lithium-ion battery packs typically include protective circuits such as the DS2720 (figure 7). The DS2720 provides a rechargeable lithium-ion power powered lithium battery


All required protection functions, such as: protecting the power lithium battery when charging, preventing the current passing through, and extending the life of the power lithium battery by limiting the discharge voltage of the power lithium battery.

Power lithium battery

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