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Lead-acid battery VRLA voltage monitoring
Battery voltage monitoring can detect incorrect float charging voltage of the battery group or whether the lead-acid battery VRLA group has been overcharged, overdischarged, and other events.
Single lead-acid battery VRLA voltage monitoring
Single battery voltage monitoring can detect incorrect float charging voltage of the single battery, whether the single battery has been overcharged, overdischarged, and other events. In addition, monitoring the voltage of a single battery can also detect battery failure events such as open circuit and short circuit.
Lead-acid battery VRLA internal resistance monitoring
Single battery internal resistance monitoring is the most revolutionary advancement in battery monitoring. The use of AC impedance method, conductance method, or DC method to measure the internal resistance of the battery has been recognized as a fast and convenient method for diagnosing the condition of the battery. More and more research suggests that there is a certain relationship between the internal resistance and discharge capacity of aging batteries.
It should be noted that due to the change in electrolyte resistance, the battery internal resistance increases rapidly as the temperature drops. Therefore, when considering the impact of time on internal resistance, temperature is an important influencing factor.
Valve-regulated lead-acid batteries are designed to have low acidity, and the ampere-hour capacity of the electrolyte is smaller compared to the active substance of lead. Therefore, the discharge process is often limited by the electrolyte.
For any new battery, the battery internal resistance is usually not linearly related to the discharge capacity. Changes in electrolyte concentration, formation degree (especially on the surface of the electrode plate), the contact area between the separator and electrode plate interface, and slight changes in pressure all have small effects on internal resistance but may have a significant impact on discharge processes. Therefore, the internal resistance and capacity of new batteries are not very stable parameters.
Lead-acid battery VRLA environment temperature monitoring
In the process of use, temperature and voltage have the greatest impact on the service life of lead-acid batteries. The increase in temperature and fluctuation in voltage will accelerate the corrosion of electrode plates and consumption of electrolyte, thereby reducing the effective working time and service life of the battery. By placing a temperature sensor on the surface of the battery, overheating of the battery can be detected, and abnormal battery operation can be detected in a timely manner.
Lead-acid battery VRLA charging current and discharge current monitoring
Excessive charging and discharging currents can cause serious damage to the battery. Monitoring these parameters can detect these problems.
Lead-acid battery VRLA event management
Event management refers to summarizing and organizing the monitoring data of the battery, discovering incorrect use events and possible failure events of the battery, transferring these alarm events to the departments concerned through the network, and storing and preserving these events for future query.
Although VRLA batteries are claimed to be maintenance-free batteries, incorrect battery use conditions can significantly damage the battery and shorten its service life. By monitoring and controlling the current, float charging voltage, and operating temperature of the battery group, the battery can work in the correct use state. Monitoring the internal resistance of individual batteries can accurately and timely detect failing batteries and thus improve the reliability of systems using VRLA batteries.
