4 factors affect the reliability of UPS power supply battery (part 1)

Factors affecting the reliability of UPS batteries used in many of the same Even if the UPS battery technology, different manufacturers of battery life this is a big difference to the user is important because the high cost of replacement batteries (about 30% of the UPS). Standard battery will reduce system reliability is something very annoying. 40Y6799 IBM ThinkPad T42 battery

The reliability of the temperature of the battery cell

Battery temperature has a great influence on the natural process of aging. Detailed experimental data show that the temperature rise for each 5 degrees Celsius, down 10% over the life of the battery, UPS should be designed to maintain the temperature of the battery as possible. The whole line and reserve hybrid online / UPS back-up type or line interactive UPS heat when carrying out large (so that the first to install the fan), which is kind of backup or line interactive UPS battery replacement a relatively long period is an important reason. IBM ThinkPad T60 battery IBM ThinkPad R51 battery

Affect the reliability of the battery charger design

Battery charger very important part of UPS, the state of charge of battery has a great influence on the life of the battery. If the battery has been a constant pressure or “float” type state of electric charge, the inverter can maximize battery life. In fact, the status of the battery life of the state of life than simply kept longer. Because the battery can delay the natural aging process of the battery, either run or stop UPS should keep the battery charging status. toshiba satellite m50 battery toshiba satellite m55 battery

Affect the reliability of the battery cell voltage

The battery is only one “stacks”, each of the voltage of the battery for about 2 V, the cell of origin of the series until the formation of a high-voltage battery, cell battery 12 V formed by the six, 24 volt batteries of 12 one original compositions and whether the battery. UPS battery charge, each connected in series has been charged with the original battery. Slightly different from the performance of the original battery charge will allow some of the original battery voltage higher than that of other primary cells, this part of the battery would be premature aging. While the original series, to a certain decline in battery performance for the elderly, the performance of the entire cell may also decrease. Testing proved that the battery life and number of the series of primary batteries, battery voltage is higher, more aging. toshiba satellite m40 battery toshiba satellite m45 battery

5 Q 5 A explains how to maintain UPS battery (part 1)

1, the battery how to maintain normal life expectancy?

A: 1, normal, the battery every 3-6 months, the charge and discharge time, discharge time after charging standard unit of not less than 10 hours. Dell Inspiron 1318 battery Dell Inspiron 1320 battery

2 UPS long rest should be 3 to 6 months duration of load.

3, the battery life, ambient temperature between 0 ℃ to 40 ℃ requirements, avoid direct sunlight and clean.

4, the temperature generally less than normal use Panasonic sealed maintenance-free battery lead-acid float lifetime of 3-5 years.

2, UPS is able to use the battery with water?

A: Yes, but recommends the use of maintenance-free battery. As can occur in the use of water user password, batteries and battery acid gas Tangchu bad, and so on, causing cell necrosis or disrupt the normal functioning of the burden of UPS. In addition, the mountain is a special charger for the UPS lead-acid batteries designed features, it is not applicable to other types of batteries. Dell Inspiron 1320n battery Dell Inspiron 1410 battery

3, UPS will have the release form specific time?

A: Because the discharge time of battery discharge current, ambient temperature, the type of load, speed, battery capacity and numerous other factors related to the actual discharge time can not be directly deduced . Is to provide battery discharge maximum current equation: I = (Pcosφ) / (ηEi)

Where P is the rated output of UPS

Is the power factor of load, PC, server usually take 0.6 to 0.7;

UPS is the performance, usually 0.8 (Mountain Special 10KVA 0.85);

Ei is the end of the discharge voltage of the battery, usually refers to the voltage of the battery.

Specific data on the type, find the current maximum capacity of the battery, you can all temperatures of the battery discharge time and discharge current diagram to identify the corresponding discharge time. Please note that there is obtained the discharge of the battery the total current value. When the external battery when the multiple needs of a single set of battery discharge current value. fujitsu lifebook t4010 battery fujitsu lifebook t4010d battery

What as basis for UPS power supply evaluation (part 1)

UPS power test main objective is to identify the actual UPS can meet the requirements of technical indicators. UPS tests generally comprise two types of static tests and dynamic tests. steady state test is empty, 50% of rated load and 100% of nominal load conditions, the test input, the output of each phase voltage, a voltage drop, power factor, efficiency, output voltage signal, distortion and output voltage frequency. Dynamic load testing is generally changing (usually chosen by the load of 000-100% and 100% -0), the output voltage test to test UPS waveform characteristics of UPS and dynamic path feedback energy. B154PW01 B154PW02 B154SW01

1, test the balance

The test is called the steady state is the device in the system “normal” test, generally measured waveform, frequency and voltage.

Waveform

Is this condition usually empty and full, the waveform observed is normal, with the extent of distortion measure the distortion of the output waveform voltage. Under normal conditions, and then the load resistance, measured with a distortion measure total output voltage harmonic content Xiangdui, products must meet the requirements defined generally below 5%. B156XW01 B156XW01 V.0 B156XW02

Frequency

Generally available observation oscilloscope frequency output voltage and the use of “disruptive power analyzer ‘measurements. UPS output voltage of the current frequency in general can meet the requirements. However, the frequency of the UPS system, the local oscillator is not precise enough, they can be unstable in the mains frequency, UPS monitoring the frequency of changes in output voltage. UPS output frequency accuracy generally in line with market power can achieve plus or minus 0.2%.

Output Voltage

UPS output voltage can be tested to judge by the following methods:

A voltage when the rated input voltage is 90%, while the output load or supply voltage from 100% to 110% rated voltage, output load is 0, the output voltage must be maintained at around 3% of nominal range. sony vgp-bps13 sony vgp-bps13a/b

B, rated voltage when the input voltage is 90% or 110%, the output voltage of a charge phase, the two other phases of the load to 100%, the output voltage must be kept above or minus three percent rated the extent of its phase must be stored at 4 degrees centigrade.

C, where the UPS DC input voltage plus or minus 15%, 0-100% output load changes, the output voltage must remain at the nominal voltage range of plus or minus 3 percent. The surface of the target with the previous indicators of repetition, but in fact it is more demanding than the previous target. This is because the control system changes the input signal in a wide range, revealing characteristics not linear to the output voltage does not exceed the allowable range, even higher requirements on the circuit. sony vgp-bps9a/b sony vgp-bsp13/s