What are the important methods for battery testing?

Three important methods of battery detection. Battery monitoring and management are designed for measuring the operating conditions of the battery and detecting the condition of the battery itself. There are three important methods for battery monitoring: ① the whole group monitoring, ② single battery voltage monitoring, ③ battery internal Resistance monitoring and monitoring. ① Whole group monitoring: The whole group battery monitoring function is generally designed in the rectifier power supply. It measures the voltage, current and temperature of the battery pack, performs charging and discharging management, especially adjusts the floating charge voltage of the battery pack according to the environmental temperature change. Good, when the battery pack voltage is low to a certain lower limit when the battery is discharging. Group battery monitoring is difficult to find the slow change of single battery, including the aging of the single battery itself and the accumulation effect caused by the consistency of the single battery. For a group of 48V battery packs, if only one battery is deteriorating , The signal of its voltage change will be sunk by the other 23 batteries. The battery terminal voltage and the battery pack bus voltage have nothing to do with the battery capacity. The whole set of monitoring cannot monitor the actual capacity of the batteries and battery packs, and cannot screen the aging batteries. ②Single battery voltage monitoring: The battery monitoring standard published by the Ministry of Posts and Telecommunications in 1997 aims to standardize battery monitoring products and technologies. The standard clearly requires that every single battery be monitored. At present, most of the products used in the telecommunications sector are designed and processed according to this standard. After the standards are formulated, the telecommunications operation and maintenance department expects that the monitoring equipment can play an important role, but the actual situation is in the floating state, the monitoring equipment can only find a few batteries with poor performance and abnormal floating voltage. Regarding the small-amplitude difference monitoring of the floating charge voltage, the system has no way to distinguish and deal with it, that is, the monitoring of the aging battery whose battery capacity has deteriorated due to the deterioration of the battery performance is powerless. At this time, if the battery float voltage change is not obvious, monitor The system will not issue an alarm. But when the discharge voltage of a certain battery is found to be abnormal, there will be a warning. But it is generally too late. Conclusion: Practice has proved that the early warning and prospectiveness of single battery voltage monitoring is poor, and it is impossible to accurately measure the internal resistance and capacity of the battery and find out the aging battery in time. ③Battery internal resistance monitoring and monitoring: Battery monitoring equipment manufacturers represented by the American company Albér have introduced a series of products for internal resistance detection of batteries by the DC discharge method in recent years. This is a qualitative change in battery monitoring technology, that is, passive monitoring of batteries. Voltage to actively and accurately test the internal state of the battery and monitor the dynamic changes of the battery pack. 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 article: What methods can extend the service life of power lithium-ion batteries?