How the hottest data center operators choose the r

2022-09-22
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How do data center operators choose the right battery

for data center operators, there is no "best" battery technology. Each battery has its own advantages and disadvantages, and operators should choose the most suitable battery products according to their own requirements

lead acid batteries

nowadays, lead acid batteries are still very popular because they have a proven record in reliability. For large-scale applications, they are the most economical choice, with excellent performance and efficiency, low internal impedance, high tolerance to improper handling, and high procurement costs

the electrolyte used in lead-acid batteries includes water and sulfuric acid, as well as electrode plates composed of sponge lead (negative) and lead oxide (anode). The main type of lead-acid battery is valve regulated lead-acid battery (VRLA), also known as "sealed" or "maintenance free" battery

valve regulated lead-acid battery (VRLA) is sealed, but there is a valve that can discharge the gas accumulated inside into the atmosphere. Usually, there is no need for direct maintenance and no need to add water, because the hydrogen released during charging will recombine with oxygen internally to form water. There are mainly two kinds of valve regulated lead-acid batteries (VRLA) on the market. The difference lies in the electrolyte mixture: the electrolyte of glass microfiber separator (AGM) battery is maintained in the highly porous microfiber glass separator; While the electrolyte of the gel battery, the thermostatic timer on the right side of the gel starts timing, which is composed of a mixture of sulfuric acid and silicon dioxide

ups usually uses AGM type sealed valve regulated lead-acid battery (VRLA), because it has low internal resistance, high specific power and efficiency, low self discharge rate and low purchase cost. Glass microfiber separator (AGM) batteries charge faster and can provide high current for a short time

the plates of rich liquid lead-acid batteries are immersed in acid electrolytes. Since there is no seal, the hydrogen generated during operation will be directly discharged into the environment, and its ventilation system must be more powerful than the sealed valve regulated lead-acid battery (VRLA). In most cases, the battery pack is housed in a dedicated room. The rich liquid lead-acid battery must be operated upright, and the water level needs to be filled manually

compared with sealed valve regulated lead-acid batteries (VRLA), they have longer service life and higher reliability. The battery room of lead-acid battery must be kept at a reasonable and constant temperature (° C) to avoid shortening the service life and even causing damage

lithium ion battery

in lithium ion batteries, the "cathode" is usually a metal oxide, while the anode is usually porous carbon graphite. Both are immersed in liquid electrolytes made of lithium salts and organic solvents

there are many kinds of lithium-ion batteries, which can be simplified to six types: lithium cobalt oxide (LCO), lithium manganese oxide (LMO), lithium manganese cobalt oxide (NMC), lithium iron phosphate (LFP), nickel cobalt alumina (NCA), lithium titanium oxide (LTO). The choice between these batteries depends on several factors, and it is impossible to make accurate comparisons, because many aspects such as machinery, cell size and active material mixing play an important role in performance

in the data center environment, lithium-ion batteries are becoming more and more attractive as an alternative to lead-acid batteries. Among them, power supply availability is definitely the most priority factor. Lithium-ion batteries provide higher reliability than lead-acid battery solutions. Not only is each individual battery safer and more stable, but each battery module has an electronic controller that can continuously check whether the battery has any signs of performance changes

the temperature, current, voltage and charging state of each battery are monitored at the cabinet level, which can clearly understand the current battery state and predict the future operation time and performance. Lithium ion batteries can charge faster than lead-acid batteries, provide more discharge/recharge cycles than lead-acid batteries, and provide higher power density and efficiency, especially at high discharge rates. This eliminates battery overuse and reduces the space required for battery installation. Although the initial purchase price of lead-acid batteries is low, the service life of lithium-ion batteries is at least twice that of lead-acid batteries with the same specifications, thus reducing the overall investment cost. It also reduces the labor costs associated with battery disassembly and replacement. Lithium ion batteries generate less waste heat, which reduces cooling costs and reduces the carbon footprint

nickel cadmium battery

nickel cadmium battery electrodes include nickel hydroxide (positive plate) and electronic tensile testing machine. So far, the most common tests for plastics are tensile strength and modulus, flexural strength and modulus cadmium hydroxide (negative plate). Nickel cadmium batteries have a long service life (up to 20 years) and can cope with extreme temperatures (- ranging from 20 ° C to 40 ° C in GB, ASTM, DIN, JIS, BS,...). They also have high cycle life and good resistance to deep discharge. Other benefits are related to low internal resistance, which provides high power density and fast charging capability. Inspection and adjustment of tensile testing machine: nickel cadmium battery can provide long storage time and high protection, which can prevent improper handling

however, the cost of nickel cadmium batteries is much higher than that of traditional sealed valve regulated lead-acid batteries (VRLA). In addition, because nickel and cadmium are toxic, the battery treatment/recycling process is expensive. Nickel cadmium batteries also need to be maintained by adding water, especially in high cycle applications or under the high charging rate of some charging methods

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