Power distribution system, and take it as the core of the whole Power supply system is to satisfy the data center is the core part of the quality of Power supply, the battery is one of the important composition of the system as a whole, is the "final barrier" of the Power supply system.
In the failure of UPS system, the reason for the battery is more than 30%.The current data center battery technology is given priority to with valve-controlled lead-acid batteries, and according to the statistics, China's production of lead-acid battery already accounts for one-third of global output, part of the reason is the rapid growth of the UPS power supply market.With the increase of Internet +, cloud computing and big data, it has accelerated the growth of the data center industry and led to the rapid growth of the related equipment of the data center.In this paper, from the Angle of the large data center planning and application of battery, the experience and lesson in the data center industry at home and abroad for reference, discuss battery design and several problems in the practical application and pain points.
Pain points a
Currently, the size of the large data center battery in the planning and design, according to incomplete statistics, accounts for about 3%~10% of the total construction area. Due to the large size of the large data center, the number of *** is quite large.For more and more large-scale data center projects, the machine room area can be said to be a lot of land, and the customer wants to increase the number of cabinets in a considerable way, and the infrastructure is as small as possible.The diagram below shows the battery layout of a large data center case, occupying an entire floor area.Here we do not focus on the layout of the battery between, only from the area between cells and the number of * * * and the ratio of the total building area, you can feel the UPS battery system for data center plane important influence of planning and design process.
The improvement of data center battery planning and design level depends on the innovation of battery technology.
Most of today's data centers use valve-controlled lead-acid batteries, with the development of battery technology, such as lithium iron phosphate battery technology, because of the long life, high temperature resistant, the advantages of small volume, no pollution, compared with the traditional lead-acid battery technology, more can reflect "energy saving", "power", "land" and so on energy conservation and emissions reduction requirements.With the improvement of the cost performance of the new battery, its size and floor area will be smaller and smaller, which will have a revolutionary impact on the planning and design of the future data center, especially for the IDC industry.
(2
Application of battery monitoring system.
In recent years the domestic industry reference data center, to learn a lot of foreign advanced ideas and technology, but the battery application of monitoring system is not perfect, a lot of battery system has been built rooms, no monitoring devices or monitoring data is not perfect, there is a big security hidden danger.From the recent incidents of battery fire and explosion in the computer room, it can be seen that the early warning of the battery monitoring system is of great importance for prevention.
If the battery failure cause UPS system outage, key business interruption, will produce a lot of political and economic losses, from the industry's research shows that: the financial industry data center each hour outage losses of $1495134, the communications industry data center each hour outage losses of $2066245.
Therefore, in the design and application of data center, the setting of battery monitoring system should be paid enough attention.
Pain points three
The valve-controlled lead-acid battery according to explosion proof design problems between them, the design standard is not unified, for the standardization of the differences of interpretation, across from the planning and design to fire the scale of the examination and approval and acceptance.
Pain points four
Lead acid battery life is generally 5~6 years, good in 7~8 years.How to better match the life cycle of data center and reduce the total application cost is a difficult problem for the data center industry.
Two possible approaches: 1. Rely on technological advancements.Battery technology revolution will profoundly influence the development of the future in the data center industry, large capacity, long life battery technology research and development, the need to study the data center industry characteristics, life cycle and docking with the data center, which conforms to the data center industry needs.
2. Scientific operation and maintenance, monitoring.Through the operation and maintenance management of battery system science, monitoring and maintenance, timely detection of the hidden trouble, thus extending the service life of the battery, reducing the total cost of ownership.
Pain points five
The battery's tolerance to the environment is improved, which is beneficial for the data center to reduce energy consumption.At present, the lead-acid battery to the requirement of the environment temperature is higher, its quite good working temperature is 20 ~ 25 ℃.Relevant data show that when the environment temperature at 25 ℃, temperature rise every 6 ~ 10 ℃, the service life of valve control battery by half, cell cycle shorten service life.When the ambient temperature decreases, the capacity of the battery can be reduced rapidly.The study of high - temperature valve - control battery has brought light to further reduce energy consumption.At present in the field, the communication base station machine room has already applied the case of high temperature valve control battery.The future with the reduction of high-temperature type battery manufacturing costs to consider the reduce the demand for air conditioning energy saving benefit, believe that the high temperature type battery technology will is a technology that is applied in the data center future direction.
Pain points six
In the process of deepening UPS and battery manufacturers, battery dc cable and connector accessories such as the choice of whether to meet the requirement of discharge, and installation quality whether meet the requirements, the if processing is not good, could become the point of failure of the accident.
Because each manufacturer of UPS technology is different, generally in the project after the bid will be secondary to deepen the process of its battery cables and accessories, often complete by UPS manufacturers, the advantage is less engineering interface, is conducive to the division of responsibility.The disadvantage is that the matching ability and the attachment quality depend entirely on its technical ability and reputation, and the leading manufacturers are relatively reliable.Due to cable and accessories problems caused by fire accidents, need to arouse enough attention.
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