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Li-ion systems are relatively new to the UPS system space, but they can provide a number of key advantages for data center applications. These batteries generally have a higher specific energy/energy density than lead-acid batteries, a longer lifespan, a shorter recharge time, and are capable of completing a larger number of charge/discharge cycles (as many as two or three times more cycles than a lead-acid, depending on the chemical composition of the battery).
However, li-ion systems are more sensitive to charging and discharging methods. Most of these batteries include a battery management system (BMS) to protect against short circuits and overcharging. Charge and Recharge Efficiency: N1C Lithium Ion batteries can be charged/ discharged over 1000 times versus 200-400 charges/ discharges for standard VRLA batteries. N1C Lithium UPS units include built in chargers capable of 1-hour recharge times, compared to 4-10 hour recharge times of VRLA battery UPS systems. With the absence of a standardised commissioning test for lithium batteries, we expect that commissioning would be somewhat similar to that of VRLA and should include the following:
There is no single ‘best’ UPS battery technology; each approach has its own strengths and weaknesses, and it is up to each data centre operator to choose the one that best meets their requirements. The information below outlines the 3 main types of UPS batteries and their features. Lead-Acid UPS Battery Why are lead acid batteries used in UPS? Housed in a tough enclosure, lithium-ion battery technology provides reliable, lightweight and compact energy storage for UPS systems. UPS power supply applications normally use the VRLA AGM type because of its lower internal resistance, high specific power and efficiency, low self-discharge and lower purchasing cost. AGM uninterruptible power supplies batteries also charge faster and can deliver a high current of short duration. Flooded LA UPS batteries Do you need to add water to flooded lead acid batteries? Full time multi-pole noise filtering : 0.3% IEEE surge let-through : zero clamping response time : meets UL 1449
The Samsung SDI lithium-ion battery system is specifically approved for use with KOHLER Uninterruptible Power’s KOHLER PW 6000 (60-120 kVA), KOHLER PW 9250DPA, 9500DPA and MF series UPS systems. Samsung SDI is one of the most experienced producers of lithium-ion batteries in the world and has a long record of safely supplying systems for use in critical power systems. The Agents tab links the software agents of multiple devices to allow for a graceful shutdown over IP. In the event of a Power outage, Agents can automatically shut down non-critical equipment to extend battery runtime. Additionally, you can set agents to shut down all equipment as the battery is nearing the end of its runtime.
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Upon logging in to the network card management interface, the landing screen displays EMP readings, outlet status, energy flow charts, power readings, and active alarms. The left panel provides access to the other management features.
The device has an automatic voltage regulator (AVR) to protect the battery from power fluctuations. It also has a built-in surge protector to safeguard your connected devices from abnormal jolts of electricity. The main tabs run down the left side and include Home (above), Meters, Controls, Protection, Environment, Settings, and Maintenance. On the Meters Tab, one can see a bit deeper into the battery and energy flow. We see the voltage and frequency, the output, battery status, and battery health.Test discharge for time, at one or preferably two different UPS load levels, followed by a review of the BMS data, looking for temperature or voltage anomalies during the discharge. Flipping it around, on the right side are two sets of 5-15R load segment outlets in two groups, four total. Moving to the left are four 5-15R managed outlets. Next to them is the EBM connector and a ground bonding screw. Continuing on our leftward journey, we see the output relay port with the external battery module detection port under it. Further over is the network-M2 card and an RS-232 serial port near the bottom with a USB next to it. This is followed by a remote power off and remote on/off port. On the left side are the fan and the power cord. This graph is based on actual measured runtime data. All measurements were taken with new, fully charged batteries and a balanced resistive load (PF = 1.0). Actual runtimes may vary from the values of this graph. Actual runtimes are dependent on several v
Life Span: The average life span of a VRLA battery is 4-6 years in ideal conditions. N1C Li-Ion battery life span is 10-15 year in nearly all conditions. Long life While Eaton brings a lot of cool features to the new 9PX-L series units, one of the most important aspects is how the unit handles a power failure scenario. The 9PX series offers two modes of operation, the first is double-conversion and the second is a high-efficiency mode. High Power Density: Lithium Ion batteries have over 5 times the Energy density and take up about 1/3 the space of a VRLA based solution that delivers the same power. This means more power in the same or smaller footprint. Cabinet Height: The LG cabinet is 95" (241 cm) tall as shipped. Since the batteries are not installed, the cabinet may be moved laying horizontally. Plan for moving this 225 lb (102 kg) cabinet through doors, onto small lifts, and note ceiling heights where the cabinet(s) will be placed. Remember that conduit will land on top of the conduit box on top of this 100.5" (255 cm) tall cabinet. Commercial/industrial ceiling heights are often 120" (305 cm), but not always. See customer drawing #110000683 for all dimensions and weights. They provide a longer lifespan and higher reliability than sealed LA batteries. LA battery rooms must be kept at a reasonably constant temperature (20 -25°C) to avoid reducing service life or even causing damage. Lithium-Ion UPS Batteries
FAQ
Power failures are a fact of life, but if you are managing a data center or a corporate network, they can be catastrophic. Uninterruptable power supplies (UPS) help keep data centers humming even when there is a tripped breaker or larger outage. The Third tab down in the management interface is the controls tab. There is a little to see here, but you can control the power states of the entire UPS and each outlet group. VPM allows the remote monitoring of the power of up to thousands of PDU and UPS device. This is done through an intuitive GUI. VPM is vendor agnostic. The software alerts for when devices need to be replaced proactively versus reactively. And VPM can deliver real-time analytics so admins know what is going on with power in their facility. Below we’ve provided an analysis of some of the pros and cons of using li-ion batteries in UPS systems. Remote trip of the battery cabinet breaker: note that the UPS does NOT generate the shunt trip command for battery breakers (a UPS "load off" or UPS EPO command will shut off the UPS but will not trip the battery breakers in the LG cabinets). The user is responsible for providing +24VDC wiring to each LG cabinet to facilitate a remote shunt trip of the battery cabinet breaker. See the installation manual and the customer drawing #110000683 for details of this connection.
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