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Detailed explanation of UPS battery connection method and discharge process. After buying a UPS power supply, many users do not know how to connect the battery or lithium battery. If the connection is wrong, the machine will not operate normally. In addition, the host does a battery self-test before the UPS battery is discharged. The following is the UPS battery connection method and some precautions that the editor brings to you. I hope it can bring you some help.
UPS battery connection method:
⒈The red pole of the UPS battery is the positive pole, and the black pole is the negative pole. The batteries are connected in series in the battery box, that is, the positive pole of one battery is connected to the negative pole of another battery.
⒉Follow this connection method. In the end, there will be two lead wires left, one positive and one negative, which are connected to the battery discharge port. Pay attention to match them one by one. Generally, the left is positive and the right is negative. When connecting, pay attention to the battery short circuit.
3. Water entering the UPS battery within a short period of time will not affect battery performance. Water is a weak electrolyte and has very weak conductivity. However, it must be wiped dry immediately, otherwise it will oxidize the battery electrode and cause the battery electrode to fall off, causing battery damage.
⒋When replacing the UPS battery cable, it is preferable to purchase raw materials from the original company's service station or dealer to avoid overheating or fire due to insufficient capacity.
⒌Do not use fire to handle UPS batteries or battery packs, otherwise they will explode and injure people. Do not damage or open the battery. The electrolyte spilled from the battery is highly toxic and harmful to the human body. Avoid short-circuiting the positive and negative poles of the battery, otherwise it will cause fire or motor.
UPS external battery connection method:
1. UPS external battery host power selection basis: power = load/power factor (generally calculated as 0.8)
2. The algorithm for configuring UPS batteries for long-term operation is as follows:
Calculate the maximum discharge current value of the battery: Imax=Pcosф/(η*Ecritical*N)
Note: P→nominal output power of UPS power supply
cosф→The output power factor of the UPS power battery (generally 0.8 for industrial frequency machines)
η→The efficiency of UPS inverter, generally 0.88~0.94 (0.9 can be taken in actual calculation)
E critical → critical discharge voltage of the battery pack (12V battery is about 10.5V, 2V battery is about 1.67V)
N→Number of batteries per group
According to the backup time of the selected battery pack, find out the required discharge rate value C of the battery pack, and then based on:
Nominal capacity of battery pack=Imax/C
Find the nominal capacity of the battery.
Due to the use of E critical - the lowest critical discharge voltage value of the UPS battery, it will lead to a situation where the required ampere-hour capacity of the UPS battery pack is too large. According to current usage experience, the actual battery pack’s ampere-hour capacity can be calculated according to the following formula:
Actual battery capacity (AH) = nominal capacity of the battery pack * 0.8
Precautions for connecting UPS battery:
Before handling, remove metal objects such as rings and watches.
When replacing the UPS battery cable, it is recommended to purchase raw materials from the original company's service station or dealer to avoid overheating or fire due to insufficient capacity.
Do not use fire to handle batteries or battery packs, otherwise they may explode and injure people.
Do not damage or open the battery. The electrolyte spilled from the battery is highly toxic and harmful to the human body.
Avoid short-circuiting the positive and negative terminals of the battery, otherwise it may cause fire or motor damage.
Check for voltage before touching the battery. The battery circuit and the input voltage circuit are not isolated, and there is a danger of high voltage between the battery terminals and the ground.
UPS battery discharge process:
1. Set or calculate the UPS battery discharge time: according to the time displayed on the LCD panel, or based on
Calculate the standby time based on the number of batteries, and set the power-off time to 30% or 25% of the calculated time.
2. Directly turn off the "rectifier input switch" of the UPS and observe the UPS LCD panel display.
The remaining time and battery voltage, or the number of indicator lights on the UPS front panel shall not be less than half of the original number of lights.
3. When the UPS battery is discharged to the battery low voltage alarm value (the measuring terminal voltage is lower than 10.5V) or the time reaches the previous budget time, close the "rectifier input switch" of the UP.
Things to note when discharging UPS power batteries:
You must first understand how long the UPS power battery can be backed up before discharging, so that you can be prepared when discharging to prevent the load from being shut down even if the backup time is not known after discharge. causing damage to the equipment.
If the UPS battery can be seen, first visually inspect the battery for obvious deformation and leakage.
If the UPS battery itself has an automatic discharge function to set the time, it is recommended that the UPS discharge itself first, so that you can initially determine whether the battery has the ability to discharge.
During artificial discharge, please always observe the drop in battery voltage of the UPS so that the mains power input can be restored at any time.
Discharging the UPS does not have to completely discharge the battery capacity. Here it is only necessary to put it into the rated capacity. The discharge only needs to activate the battery and extend the service time of the UPS battery.
The above is a detailed explanation of the UPS battery connection method, discharge process, and precautions. Have you learned it? The UPS power battery can extend its service life by regularly discharging it.
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