24V. Most UPS power supplies are batteries composed of 12V lead-acid batteries connected in series and parallel with different powers and models have different voltages. The lowest is 24 V, then 36 V, 96 V, 192 V or even 384 V or more. The specific UPS power model is and power supply. The 192V lithium battery can be adapted to 6K~30K uninterrupted power supply. The UPS system uses a high-voltage DC lithium iron phosphate battery system to directly supply power.
Why do 18650 lithium batteries have different capacities?
The power of the equipment is 20 W and must be powered continuously for 20 hours; How big is a UPS? According to the requirements, as long as the minimum inverter is sufficient, generally 500VA, the time problem is determined by the size of the battery.
Currently, battery specificationsLead acid batteries mainly include C2, C5, C10 and C20 batteries. If continuous power supply is required for 20 hours, you should use C20 battery (special UPS battery) or lithium battery.
There are only 4 hours charging per day, and 4 hours charging and discharging for 20 hours, then the battery requirement is 20W*20h=400wh=12v*35ah=24v *17ah
< p>Charging: Current is: 12V * 35Ah is approximately 35/4 = 9A using a 9A charger.24V * 17Ah is equivalent to about 17/4 = 4A using 24v4A charger.
The battery is too big and can easily damage it
So it is recommended to use batteries with lithium, which can be charged with high current
Is a UPS uninterruptible power supply necessary?
18650 is one of the most commonly used lithium batteries. 18650 represents a cylindrical battery with a diameter of 18 mm and a length of 65mm. It is widely used in electric vehicles, flashlights and uninterruptible power supplies. and other occasions.
18650 Battery SpecificationsThe rated voltage of 18650 battery will be different depending on the battery type. Taking common lithium-ion batteries as an example, its nominal voltage is 3.7V, saturation voltage is 4.2V and conventional. The capacity is 2600 mAh, but batteries from different manufacturers, or batteries from different models from the same manufacturer, will have different rated capacities. Common capacities include 2000 mAh, 2200 mAh, 2600 mAh, etc. Batteries of different capacities will have different manufacturing costs. Currently, the conventional capacity of 2000 mAh is considered low capacity. There are also less expensive batteries with capacities of 1500 mAh or even lower. 18650 cans. Highest capacityreached is approximately 3400 mAh.
Why do 18650 batteries have different capacities?In fact, it's not just 18650 batteries. Other types of batteries, even if they are the same size, will have different capacities. This is related to the manufacturing process of the battery, the materials used, etc. There are differences in manufacturing costs for batteries of different capacities, which will cause differences in sales prices. When selecting batteries, you should base your selection on actual capacity needs and costs. Make your choice based on factors like this.
Although different capacities can be obtained by connecting batteries in parallel, when the space is relatively fixed, you should consider choosing batteries of different capacities. Some need to use larger capacities, and some only provide electrical power. butfor parameters such as capacity, they are not demanding. In fact, besides the differences in rated voltage and capacity of 18650 lithium batteries, another important parameter is the discharge rate. This parameter determines the instantaneous and long-term output current of the battery, so 18650 batteries are generally divided into capacity type and power type. Capacity-type batteries focus on capacity and are generally used in situations where long-term low-current discharge is required; Power type batteries require instantaneous or continuous discharge current and are generally used in situations where the operating current is relatively large, such as power tools, etc.
The main reason that batteries of the same size will have different capacities is due to manufacturing cost. Given this problem, it is necessary to fmake a reasonable choice according to the actual situation. As for the 5500mAh, 9800mAh, 12500mAh and other capacity batteries mentioned in the question, this is not realistic for a single 18650. These batteries are all batteries with virtual capacity standards. To achieve this capacity, you must use multiple batteries in parallel. reached.
I think it is necessary, because when the mains input is normal, the inverter stabilizes the mains voltage and supplies it to the load. At this point, the inverter is an AC voltage stabilizer. , and it also charges the battery inside the machine; When the mains power is interrupted (accidental power failure), the inverter will immediately continue to supply 220V AC power to the load through the inverter switching and conversion method, so that the load can maintain operation and normal protection. The software and hardware ofcharging are not damaged. UPS equipment typically provides overvoltage or undervoltage protection. Therefore, computer rooms in various fields need a powerful UPS to maintain stability. Compared with inverters in the same industry, Huawei's lithium battery inverter has particularly significant advantages and is also a very good choice.