Lithium battery has many advantages, but it can not be used in UPS power supply battery for a long time. Why? The main reason is the high cost design threshold of lithium battery, which makes it difficult for ordinary manufacturers to replace lithium battery.
Due to the different characteristics of lithium battery and lead-acid battery, the charging curve and circuit are different, and the charging equipment varies with the UPS power supply of different brands and specifications. Therefore, it is almost impossible to directly replace the lead-acid battery with lithium battery when the old UPS battery client replaces the battery every year. What's more difficult is that the lead-acid battery specifications are 12V, and the capacitance ranges from 7Ah to 70ah. To 500ah or higher, the lead-acid batteries are stacked in series and parallel according to the demand.
However, UPS lithium battery pack has a protection board BMS to control overshoot and overdischarge. Therefore, if the current lithium batteries are stored in a unit (assuming 48V, 30ah) with a voltage and capacitance in the form of lead-acid batteries, and then stacked in parallel according to the power demand of each computer room, there will be a problem between BMS of each lithium battery pack. Because the existing voltage and power of each battery pack are different, it will produce a protection condition when charging or discharging and cannot be used.
UPS power supply battery does not need lithium battery, UPS is mainly a price problem, and its application scope is not wide. At this stage, most of the lithium battery ups are still used in some special projects with relatively high requirements, but the mainstream is lead-acid battery UPS, after all, the price can not be compared. Lithium batteries are two to three times more expensive than traditional lead-acid batteries.
Does UPS still use batteries instead of lithium batteries?
The price of traditional lead-acid battery UPS is low, and its service life is as long as five years. However, the price of lithium-acid battery UPS is high, which can meet the situation that lead-acid can not meet, such as volume, use environment, etc. in general, there are no special requirements for data center, special vehicle, modified vehicle, etc., so as to save costs. The main problem is the cost. Although it is better than lead-acid battery in volume, weight and safety, if users do not have the rigid requirements in these aspects, they will basically give priority to lead-acid battery. After all, lithium battery UPS is still in the promotion stage.
Most manufacturers still don't support lithium-ion batteries. Moreover, the market share of lithium-ion battery UPS accounts for a very small proportion of the whole UPS market, and many manufacturers are not willing to spend too much manpower and material resources to promote this one. This leads to the reason why the ups battery power supply in the market uses lead-acid batteries rather than lithium batteries.
