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Advantages of lithium battery in UPS

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Time of publication: September 10, 2020 11:29

Charging and discharging speed, energy efficiency and battery life all attract lithium-ion batteries to be used in U PS power supply Factor. In the existing UPS, lithium battery has many advantages far beyond conventional lead-acid battery. Longer life, smaller size, lighter weight, faster charging speed, and falling price make lithium battery an attractive energy storage technology. White background - (2). Jpg

Common problems of using lithium battery in UPS power supply.

In many aspects, lithium battery has more advantages than traditional lead-acid battery. Although it has many advantages, it is quite novel to use lithium battery (UPS or backup battery) in VRLA battery, and the latter is still the mainstream energy storage technology and is widely used at present. As the cost of lithium batteries continues to fall, its advantages are being understood by more and more people, and lithium battery manufacturers are constantly making their ups more compatible, which is likely to change.

What's the difference between a lead-acid battery and a lithium-acid battery?

Lead and lithium batteries have long battery life, different nominal voltage, internal material, energy and price. The service life of lead-acid battery is generally two years, and lead-acid solution should be supplemented regularly. Compared with lead-acid batteries, lithium battery The life span is generally 4 years. Unlike lead-acid batteries, lithium batteries are more environmentally friendly and less polluting.

The energy of lead battery is 30 W / kg and that of lithium battery is 150 W / kg. The difference between the internal materials of lead-acid batteries and lithium-ion batteries lies in their positive and negative electrodes. When lead battery and lithium battery start to work, both positive and negative electrodes will have chemical reaction. Lithium battery is an organic electrolyte, while lead-acid battery is concentrated sulfuric acid, and their conductivity is different.

The main difference between lead-acid battery and lithium battery is that the chemical composition of materials used in electrode and electrolyte is different. At present, most lithium batteries use metal oxide as anode, while carbon based material is anode. The electrolyte is a lithium salt dissolved in an organic solvent. Lead acid batteries include lead dioxide as cathode, lead anode and electrolyte in the form of sulfuric acid.

How to compare the cost of lithium battery system and lead-acid battery system when using UPS power supply?

In terms of operation cost, lithium battery has obvious advantages. The main reason is that its service life is twice (or longer) than that of VRLA battery. Valve regulated lead-acid battery systems can be replaced 2-3 times in the past 15 years, while lithium batteries can be replaced without any replacement (perhaps only once), saving a lot of money and reducing the number of repairs.

The cycle life of lithium battery (40 ° C / 104 ° f) is sometimes higher than that of lead-acid battery (20-25 ° C / 68-77 ° f). As a result, in these cases, they can withstand higher ambient temperatures and maintain the specified cycle life. This can reduce refrigeration energy consumption, thus saving more operating costs. Research shows that the total cost of ownership of lithium battery based UPS power system is generally 10-40% lower than that of VRLA battery system in the past 10 years.

Is there any potential safety hazard for lithium battery?

Lithium battery has been greatly developed, its security is also higher and higher, and its performance is stronger than the general battery. Because of the change of chemical composition and the improvement of battery package, it is more stable. The production process is mature, and.

The material is more durable. All battery management solutions have been fully tested and field verified to prevent overcharging or overheating of lithium batteries. Hundreds of millions of portable electronic devices, smart phones and electric vehicles use a large number of lithium batteries, which directly proves the safety of lithium batteries.

Provide accurate battery status, health status and available running time information for users and UPS power supply. Although BMS can make lithium battery system safer, it will also lead to the increase of battery cost. As they increase the cost of the solution and consume the power of the battery, their efficiency advantage over lead-acid batteries is eliminated or significantly reduced.

Can existing UPS use lithium batteries?

Assuming that the voltage of the battery system is within the scope of the ups, the existing UPS can be compatible by upgrading the ups firmware, so as to ensure the correct charging procedure, correctly calculate the running time, and accurately report the charging state. Be sure to contact the ups manufacturer to determine which lithium batteries are safe and compatible.

How long is the cycle life of lithium batteries?

The cycle life of conventional sealed lead-acid battery is 200-400 cycles. In UPS applications, a typical lithium battery can achieve more than 1000 cycles. The amount depends on a number of factors, including the specific chemical composition used in the design. Now, some lithium batteries can be recycled more than 5000 times.

Does the lithium battery used in UPS need cooling?

With the increase of temperature, the cycle life of lead-acid battery and lithium battery is also shortened. However, compared with lead-acid batteries, lithium batteries have a shorter life at high temperatures. Most of the batteries are designed to withstand a high temperature of (104 ° f) for example. In most UPS applications that use lithium batteries, auxiliary cooling is not required to maintain cycle life, but keeping the battery at a low temperature (e.g., 25 ° C / 77 ° f) can help ensure that the battery takes full advantage of its operating time.

How about the charging time of lithium batteries compared with lead-acid batteries?

Battery charger is usually in ups and controlled by UPS. In this way, the time required to reach 80% SOC is the same. The charging efficiency of lithium batteries is slightly higher, so it can reach this charging level a little faster. But in terms of 80% to 100% state of charge, lithium batteries do quite well. Within 30 minutes to 1 hour, the lithium battery can reach 100% state of charge, as long as the ups can provide charging energy at the same speed. In any case, it charges 5-10 hours at 100% charge than the lead-acid battery system.

Lithium battery has the advantages of small volume, light weight and fast charging speed. In the application of UPS, lithium battery can be said to be a more environmentally friendly solution. You want to Replace UPS battery with lithium battery When, or to consult professional and technical personnel, consider charging voltage, current, load, power and other factors. Security is absolutely * * bit, do not cause UPS power failure or loss due to unnecessary installation errors, but lose the big and small.


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