On-line monitoring - monomer battery temperature-Power Kingdom
by：Power Kingdom 2020-08-26
Lead-acid battery as the core of back-up power, much attention has been paid to its reliability. Users of industry has realised that in order to ensure that the service life of the lead-acid battery can achieve its maximum reliable, must be careful maintenance, test on a regular basis. In recent years, with the maturing of lead-acid battery management technology, lead-acid battery online monitoring management possible, common lead-acid battery on-line monitoring system for lead-acid battery voltage, internal resistance as the main monitoring parameters, supplemented by environmental temperature or temperature group. But for the battery itself, the temperature is a key parameter of storage battery monitoring, international standard IEEE1188, temperature is solid battery at room temperature or temperature group usually confined to a certain time, in practice, we have found that in a user's battery, at the same time there are 6 only the temperature of the battery in low temperature alarm, but the ring monitoring system in the room temperature is 18 degrees, everything is normal, after the battery actual detection alarm, found this 6 battery installed respectively in outlet near the battery compartment of the two, because of the ventilation system of battery compartment insulation damage and failure in the line, lead to room temperature on uneven, make part of the battery is in low temperature working condition. So the temperature of the monomer battery test can early warning signal, found the problem in time, a more reasonable design and the layout of the allocation of storage battery, effective use of the capacity of the battery. Based on lead acid battery is affected by temperature, the monitoring of monomer battery temperature except as the basis of improving the environment temperature, more important is for & quot; With temperature compensation & quot; Charge designed to provide accurate information. The service life of the lead-acid battery factory promise technical indicators based on given under the environment temperature is 25 ℃. In practical application, lead-acid battery charging voltage and life will change along with the change of temperature. When every 1 ℃ environment temperature, monomer lead-acid battery charging voltage drop nearly 4 mv, so for the 12 v battery, 25 ℃ when the float charging voltage to 13. 5 v; When the temperature of the environment is reduced to 0 ℃, float charging voltage should be 14. 1 v; When the temperature rose to 40 ℃, float charging voltage shall be the 13. 14V。 When the environment temperature, battery charged allowed by the floating of threshold pressure will gradually decline. If float charging voltage valve value is still a fixed value, ( The 12 v battery for 13. 5V) , is bound to put battery in & other; Over voltage charging & throughout; Work status, apparently can make battery accelerated aging. At higher temperatures, the charging voltage shall be reduced, otherwise the battery plate by sulfuric acid corrosion, making it shorten the life. When the environment temperature is lower than 25 ℃, charging voltage should be improved, in order to prevent the under charge. Using the measured temperature of the monomer battery signal real-time automatic adjust the charger to float charging voltage, thus put battery in best float charging pressure - Temperature working condition, the realization of temperature compensation function to ensure that the battery to meet the design life. On the Sentinel module design of LEM and highly integrated Soc chip, monomer battery temperature, voltage and resistance at a suit, on-line monitoring of voltage and resistance at the same time can accurately measure the monomer battery temperature, is the perfect embodiment of lead-acid battery online monitoring system. Finalize the storage battery is one of the necessary testing parameters in regular maintenance. Due to the different environmental temperature will greatly affect the freezing point of the electrolyte in the lead-acid battery and the activity of the active material, in order to ensure the chemical reaction, adequately battery in general is designed according to the standard environment temperature 25 ℃, the range of 21 - is ideal job 27℃。 A lot of running data show that adverse temperature will shorten the life of the battery for a long time. Lead-acid battery capacity is also related to temperature, temperature is about every 1 ℃, below capacity will fall by 1%, so the manufacturer requirements users of lead-acid batteries battery out 50% of the rated capacity in the summer, winter released after a 25% should charge in a timely manner. Temperature as the key parameters for early detection of lead-acid battery problem, battery online monitoring systems rely on batteries at room temperature or group of temperature measurement is far from enough, don't really have to battery prevention and protection, to truly realize the battery on-line monitoring system for the purpose of early detection, early prevention, and maintenance, the monomer battery temperature measurement is necessary. Sentinel provided by LEM battery monitoring module design in full consideration of the factors that influence the lead-acid battery makes monomer battery temperature monitoring is simple.