The lithium battery pack is discharged separately to investigate whether the lithium battery pack can meet the needs of the maximum average load. This discharge method is called verification discharge. The specific method is: choose to interrupt the work of the high-frequency switching power supply under the maximum load, and make the lithium battery pack discharge separately, so that all the power required by the actual load is borne by the lithium battery pack, and the lithium battery pack is calculated at the end of the discharge. Output capacity. In actual operation, the DC system still adopts the method of voltage monitoring. The capacity of individual lithium batteries has dropped severely, but they have not been discovered in time during normal operation. This is because the voltage of lithium batteries with insufficient capacity is often relatively high, so that inexperienced personnel think that there is no problem with the capacity of these lithium batteries. In the floating charge state, the floating charge current of each lithium battery is the same, because the internal resistance of the lithium battery with insufficient capacity is relatively large, and the partial pressure of the lithium battery with large internal resistance is larger than that of other lithium batteries , The result of the measurement is that the voltage of the lithium battery with insufficient capacity is higher than the voltage of other lithium batteries. Therefore, it is not advisable and untrue to judge the capacity of a lithium battery only based on its voltage. As a valve-regulated lithium battery, it is necessary to check charge and discharge, and it needs to be strictly implemented.
The correct use of lithium batteries-strengthen the management of floating charge operation modeThe floating charging operation mode is that in the DC power supply system, the lithium battery pack is connected in parallel with the charging device equipment, as the only backup power supply for the substation DC power supply system. In the process of floating charge operation, the actual capacity of each lithium battery is different due to the difference in internal resistance and self-discharge of each lithium battery, which is manifested in the inconsistency of the terminal voltage.
The lithium battery under the floating charging mode has fewer charge and discharge cycles, the capacity of self-discharge and deep discharge can be supplemented in time, the utilization rate of active materials is high, and the service life is long. Lithium batteries have a self-discharge phenomenon, so the charging voltage of lithium batteries must be kept at a constant value during floating charge. Under the action of this voltage, the charged power should be sufficient to compensate for the power loss of the lithium battery due to self-discharge. At the same time, it should be ensured that the discharged battery is fully charged in a relatively short time, so that the lithium battery can be fully charged for a long time.
Depending on the operating environment temperature of the lithium battery pack, the requirements for the float voltage of the lithium battery will also be different. The relevant operating technical parameters of the monitor should be set to eliminate the undercharge and overcharge caused by the temperature difference. Therefore, according to changes in ambient temperature, the float voltage value must be adjusted accordingly.
The correct use of lithium batteries-balanced chargingDuring the operation of the lithium battery pack, the self-discharge of each lithium battery is not completely consistent, which will cause the internal resistance and terminal voltage of individual lithium batteries to be different from those of most lithium batteries, resulting in inconsistent capacity of each lithium battery, that is, Unbalanced phenomenon. In order to solve such problems and increase the output voltage of the charging device, a larger charging current is generated in the lithium battery circuit. At this time, while meeting the capacity of individual lithium batteries, other lithium batteries are in an overcharged state. Equalization charging should not be used frequently, otherwise it will have adverse effects on other lithium batteries (water loss, thermal runaway, etc.). If necessary, individual lithium batteries can be individually activated to restore their capacity.
Mobile phones and earphones have become necessities in our lives. How many people feel restless when they don`t have a mobile phone around. The mobile phone gives us a great sense of security to a certain extent, and its additional earphones also have such a function. . Wear headphones when you don`t want to talk; when you don`t want to listen to others, you wear headphones; when you don`t want to be harassed in an unfamiliar environment, you can play your favorite songs, be happy or sad, and enjoy your little universe most comfortable. There are now a variety of earphones on the market for people to choose from. From the original wired earphones to the current wireless Bluetooth earphones, they are more and more in line with people's requirements, and the sound quality and noise reduction are also constantly improving.
If you want to get a sports headset (sports scene) or a true wireless tws true wireless Bluetooth headset, what you expect from him is that it has the ability to withstand the test of different environments, wear it steadily, and have a long battery life, or it may be out of the street. Appearance, excellent sound quality, stable connection, friends who have certain requirements for sound quality and low requirements for noise reduction. You can take a look our earbuds.
Headphone 5.0 Handsfree,Cute Earphones,Mini Headphones,Ultra-Light Earbuds
Shenzhen Focras Technology Co.,Ltd , https://www.focrass.com