What are the factors affecting battery reliability

by:Power Kingdom     2021-07-07

Many factors that affect the reliability of batteries, even if UPS uses the same battery technology, the number of battery cycles between manufacturers is very different, which is very important for customers, because the cost of switching batteries is high (about 30% of the market price). Common faults in battery charging will reduce the reliability of the system software, which is a disturbing problem.

1. The reliability of the battery is affected by the temperature of the battery

The brittleness of the battery is very harmful to the whole process of charging the battery. The detailed test data shows that every time the temperature rises by 5 degrees Celsius, the battery life is reduced by 10%, so the design of UPS should keep the rechargeable battery as cool as possible. Full online and reserved/online hybrid rise is much hotter than backup or online interaction (so the first one is to install a radiator fan), which is also the key reason for backup or online interaction to rise interactively.

2. The design of the battery charger endangers the reliability of the battery

The rise of battery chargers is a very important part, and the battery charging standard has a great influence on the number of battery cycles. If the rechargeable battery is always charged by a constant current source or a floating household appliance battery, the service life of the UPS battery can be increased. In fact, the charging life of a battery is much longer than that of a pure battery. Because battery charging can slow down the entire process of battery fragility, UPS should keep the battery charged, whether it is running or shutting down.

3. The battery voltage damages the reliability of the battery

The battery is an independent original battery reaction. The voltage of each original battery is about 2 volts. The original battery connection produces a higher Working voltage rechargeable battery, 12 volt rechargeable battery is composed of 6 volt original battery reaction, and 24 volt rechargeable battery is composed of 12 volt original battery reaction. When the UPS battery is charged, each serialized original battery is charged. Small differences in the performance of primary batteries will cause some primary batteries to charge higher voltage than other batteries, and these batteries will become brittle earlier. If the characteristics of the elderly are reduced by a series of original batteries, the characteristics of all batteries will also be reduced. The experimental results show that the number of battery cycles is related to the total number of battery reactions. The higher the battery voltage, the faster the brittleness.

The standby switching power supply can be displayed at the end of the voltage, or the IT machine can be shut down in an orderly manner within a certain period of time. Large-scale data centers rely on UPS and phase batteries to provide power protection to ensure that important system software operations are displayed at the end of the voltage cycle.

(1) Reliability

Switching power supplies generally use lithium battery pack power systems, and all batteries will become common points of failure. A damaged battery will crash a large data center, especially if the large data center equipment does not create redundant UPS power data.

A study by the pollomon research office of the Poll Bureau found that common failures in batteries are unplanned failures in large data centers that go beyond human-induced errors, excessive increase in capacity, hacking, and extreme Weather safety accident. The study found that 55% of unplanned power outages and one-third of UPS system abnormalities are related to common battery failures.

(2) Working life

The battery must be replaced every 4 to 5 years, or three to four within the 15-year life of the UPS system Times. The cost, time and human capital involved in switching batteries add to their total cost. The service life of a battery lies in the charging frequency of the battery. However, factors such as battery overcharging, frequent charging and discharging cycle systems, high or uneven indoor temperature, too tight battery terminals, and loose battery connections can affect battery life.

(3) Specifications and net weight

The battery cabinet occupies a large amount of indoor space in the construction of large-scale data center infrastructure. In addition, the net weight of the battery will be very large. In some large data center equipment, wooden floors need to be constructed to bear the net weight of the battery system software.

(4) Repair and maintenance

Large data center equipment technicians and professional technicians must constantly evaluate the actual situation of lead-acid batteries based on regular monitoring of the working voltage to ensure damage The battery is not easy to endanger the normal operation of the battery. Large data centers must be maintained frequently to eliminate corrosion, avoid disconnection, and identify and replace defective batteries.

(5) Refrigeration regulations

The battery must be controlled at room temperature at 77°F (25°C) to ensure all normal operation and service life of 4 to 5 years. The cost of the refrigerated battery room or server cabinet increases with the increase in the total cost. In addition, the ohmic conversion of the battery is sensitive. Every 10 degrees Celsius increase in room temperature will reduce battery life by half.

(6)Environmental pollution

Lead and sulfuric acid are the key components of batteries, which are harmful to the natural environment. The recycling of storage batteries is regarded as one of the most polluting manufacturing industries in the world.

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