What are the correct charging methods for Shanterups power supply?Shante UPS power supply, as a backup energy storage power supply for large companies such as shopping malls, supermarkets, banks, base stations, has a vital and detached position. Besides the function of protecting equipment from power failure, it also shoulders the role of stabilizing voltage. So with UPS power supply, we can make our work and daily life orderly. However, it is often neglected to maintain, people think that UPS power supply is maintenance-free, and pay no attention to it, thus reducing the service life of UPS.
UPS power supply, as a reserve energy storage power supply for large companies such as shopping malls, supermarkets, banks, base stations and so on, has the most important and detached position, besides the function of protecting equipment from power failure, it also shoulders the role of stabilizing voltage. So with UPS power supply, we can make our work and daily life orderly. However, it is often neglected to maintain, people think that UPS power supply is maintenance-free, and pay no attention to it, thus reducing the service life of UPS.
UPS power supply in normal conditions at room temperature and normal use, generally sealed maintenance-free lead-acid battery floating charge life of 3-5 years. However, many human factors will greatly shorten the life of UPS power supply. It can be seen that unreasonable maintenance of UPS power supply will affect the normal service life of adw, so there are several points for attention below.
1. Battery environment requires temperature between 0 and 40 degrees to avoid direct sunlight and keep clean.
2. Normally, the battery is charged and discharged every 3-6 months, and the charging time of the standard machine should be no less than 10 hours after discharging.
3. UPS power supply is not used for a long time. It needs to be recharged every 3-6 months.
1. Constant current charging
Constant current charging is a method of sectional constant current charging. Generally, it is realized by adjusting the charging device itself. It can choose and adjust the charging current arbitrarily and has strong adaptability. It is especially suitable for long-term charging with small current, and is also conducive to the charging of batteries with slower capacity recovery. The disadvantage is that the initial charging current is too small, the later charging current is too large, the charging time is too long and the gas is too much. Generally, it is used in initial charging and desulfurization charging at low current. Because the variant of constant current charging is piecewise constant current charging, the charging current should be adjusted in time to avoid excessive current in the later stage of charging. The size of charging current, charging time, timing of converting current and selection of charging termination voltage should also be paid attention to. The operation should be strictly in accordance with the charging range.
2. Constant Voltage Charging
Constant voltage charging means that each single cell battery is charged at a constant voltage (usually multiplied by 2.5V). The characteristics are as follows: the initial charging current is quite large, the relative density of the battery electromotive force and electrolyte rises rapidly. With the continuation of charging, the charging current decreases gradually. At the end of charging, only a very small current passes through: short charging time, low energy consumption, generally charging the battery for 4 to 5 hours can obtain 90% to 95% of its capacity; if the charging voltage is selected properly, the whole charging can be completed in 5 hours. This charging method is widely used for supplementary charging. Because the initial charging current is too large, when the battery is charged with too much discharge depth, the initial charging current will rise sharply, which will easily lead to overcurrent of the charged battery or damage of charging equipment. Because the charging current can not be adjusted during charging, it is not suitable for the initial charging and desulfurization charging of batteries. It is very difficult to compensate for the change of battery voltage during charging, so it is very difficult to complete the battery with slow capacity recovery.
3. Fast Charging
Fast charging is a method of charging with high current. Fast charging does not produce a lot of bubbles and does not heat, which can shorten the charging time. At present, there are mainly two kinds of fast charging: pulse charging and high current fast deceleration impulse charging.
4. Balanced Charging
Equilibrium charging is a process of charging for 1 to 3 hours with a small current (1/20C20A). Mainly used to eliminate a group of floating charging operation (i.e. parallel connection of DC power supply and storage battery) under the same operating conditions, the difference of the whole group of batteries caused by some reason is formed, in order to achieve the balance of the whole group of batteries. Generally, this method can not be used frequently, but when one of the following situations occurs, the battery must be charged equally:
A battery is not charged in time after long time of current discharge or long time of DC charge.
When the individual cell voltage and electrolyte density of B battery are low, the whole battery will be different.
C does not charge or discharge according to the prescribed period.
5. Constant Voltage and Current Limited Charging
Constant voltage current limiting charging is mainly used to remedy the shortcoming of excessive charging current when charging at constant voltage (method with constant voltage charging). The charging current is automatically regulated by a series resistance (current limiting resistance) between the charging power supply and the charged battery. When the charging current is too large, the voltage drop on the current limiting resistance is also large, thus reducing the charging voltage; when the charging voltage is too small, the voltage drop on the current limiting resistance is also small, and the voltage loss of the charging equipment output is also small, so the charging current is automatically adjusted so that it does not exceed a certain limit. This method is widely used in the initial charging of maintenance-free batteries and the supplementary charging of ordinary batteries.
6. Intelligent Charging
Intelligent charging is an advanced charging method at present. The principle is to dynamically track the acceptable charging current of the battery during the whole charging process. Du/dt technology is applied, that is, the charging power supply automatically determines the charging parameters according to the state of the battery, so that the charging current can be maintained near the acceptable curve of the battery from beginning to end, and the battery can be charged almost without gas precipitation, thus protecting the battery. This method is applicable to