The lead-acid battery is used as the core of the reserve power supply, and its reliability has received attention. Users in the industry have realized that in order to ensure that lead-acid batteries can achieve their maximum reliable service life, they must be careful and regularly tested. In recent years, with the increasing maturity of lead-acid battery management technology, online monitoring management of lead-acid batteries is possible, and common lead-acid battery online monitoring system is more than lead-acid battery voltage, internal resistance as the main monitoring parameters, supplemented by an environment Temperature or grouping temperature. However, for the battery itself, the temperature is also key parameters in battery monitoring, and the international standard IEEE1188 is specified, the temperature is solidThe usual battery room temperature or group temperature is limited to a few points. In practical applications, we have found that there is a battery pack of a user, and there is a low temperature alarm of 6 batteries, but the ring temperature is 18 in the ring monitoring system. Degree, everything is normal, through the actual detection of the alarm, found that the 6 battery is mounted close to the two ventilation ports close to the battery chamber, due to the damage of the insulation layer of the exhaust port of the battery chamber, resulting in the failure of the pipeline The imbalance in room temperature makes some batteries at a low temperature. Therefore, the temperature test of the monomer battery can make a warning signal as soon as possible, find problems, more reasonably designed and distribute the layout of the battery, effectively utilizing the capacity of the battery.
Based on the temperature of the lead-acid battery, the temperature of the monomer battery is monitored in addition to the basis for improving the ambient temperature, and more importantly, it can provide accurate information for charging design of "tape temperature compensation".
The useful life of the lead-acid battery is currently presented at ambient temperature at 25 ¡ã C. In practical applications, the charging voltage and life of the lead-acid battery will change with temperature changes. When the ambient temperature is 1 ¡ã C, the charging voltage of the monomer lead-acid battery drops about 4mV, then the floating charge voltage at a 12V battery, 25 ¡ã C is 13.5 V; when the ambient temperature is reduced to 0 ¡ã C, the floating charge should be 14.1V; When the ambient temperature rises to 40 ¡ã C, the floating charge should be 13.14V.
When the ambient temperature rises, the threshold of the floating voltage allowed by the battery will gradually decline. If the floating voltage threshold is still a fixed value voltage, (12V battery is 13.5V), the battery can be placed in“Overvoltage charging”Working status, obviously allows the battery to accelerate aging. When the temperature is increased, the charging voltage should be reduced, otherwise the medium plate of the battery is exacerbated by sulfuric acid, thereby shortening its life. When the ambient temperature is less than 25 ¡ã C, the charging voltage should be improved to prevent insufficient charging.
Using the measured temperature signal of the monomer battery to automatically adjust the floating voltage of the charger in real time, set the battery pack to the optimum floating voltage-temperature operating state, realize the temperature compensation function, and ensure that the battery has reached the design life.
The Sentinel module of the LEM uses a highly integrated SOC chip, set a single battery temperature, voltage and internal resistance, and simultaneous online monitoring voltage and internal resistance can accurately measure the temperature of the monomer battery, and is the lead-acid battery online monitoring. The system is perfect.
One of the necessary detected parameters in regular maintenance of the battery.
Since different ambient temperatures greatly affect the activity of the refrigeration fluid in the lead-acid battery, in order to ensure the adequate chemical reaction, the battery is generally designed according to the standard ambient temperature 25 ¡ã C, its ideal operating range is 21-27 ¡ã C. A large number of operating data proves that long-term adverse temperatures shorten the life of the battery. In addition, the capacity of the lead-acid battery is also related to the temperature, about 1 ¡ã C, which will drop by 1 ¡ã C, and the manufacturer requires the manufacturer to discharge ranging from 50% of the rated capacity in the summer battery, after the winter releases 25%. It should be charged in time.
Temperature as key parameters in early detection of lead-acid battery problems, only relying only on battery temperature or set temperature in battery online monitoring system, it is not enough to truly act against battery prevention and protection, to truly implement online monitoring of batteries The system early found that early prevention, early maintenance purposes, the measurement of the temperature of the cellular battery is essential. The Sentinel battery monitoring module provided by the LEM fully considered the factors affecting the lead-acid battery, so that the monitoring of the temperature of the monomer battery is simple Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery
