From：CTECHI GROUP Limited Release time：2018-09-26
Overview：Lithium ion batteries are powering the future of electric vehicles and personal electronics. We can see abundant kinds of such products as commercial lithium ion ba ttery for ebikes, 3.6v rechargeable lithium ion battery for medical device and high energy density battery for smartwatch. One extra and relatively new application for lithium ion batteries is their use in continuous power systems for big data centers. — Lifepo4 Lithium Iron Phosphate Battery Packs
Lithium ion batteries are powering the future of electric vehicles and personal electronics. We can see abundant kinds of such products as commercial lithium ion ba ttery for ebikes, 3.6v rechargeable lithium ion battery for medical device and high energy density battery for smartwatch. One extra and relatively new application for lithium ion batteries is their use in continuous power systems for big data centers.
"The data center market, if I just look at the lead-acid (battery) section, is near $3 to $3.5 billion yearly, globally. In North America, it is near $1.3 billion," Lynn told Design News. "Lithium only has near 2 to 3 percent of that, but it's starting to turn. The way the market works, you have the engineering design firms putting out a spec, and all those specs now have lithium in them," he noted.
Lithium ion have an amount of advantages over lead acid in data center applications. First of all, the life expectancy of a lead-acid battery data center system is near 3 to 6 years. According to Lynn, a system constructed from lithium ion batteries will last much longer—as much as 15 to 20 years. This alone causes lithium more cost effective.
Another advantage provided by lithium ion batteries is the precise information on the battery cell and pack health. This information can be obtained by the battery management system (BMS), which is used to supervise state of charge and cell temperature in a pack. A BMS is a necessary part of a lithium ion system to ensure that the battery cells remained balanced and within their voltage limits. The data provided by the BMS can also be used to precisely assess how well the battery system is operating.
Lithium ion battery packs also boast lighter weight and smaller size compared to an equivalent lead-acid battery system. As a result, lithium can offer the same size with a smaller footprint or more power from a pack of the same physical size.
The lower weight is a huge element, as a lithium pack has much lower floor loading than weighty lead-acid batteries. This permits lithium systems to be installed many floors above the ground without needing extra floor bracing. "I believe it's going to change the co-location data center, where you will start seeing high rises," Lynn told us. "Instead of one or two story data centers, you will start seeing them go up because real estate is so expensive—especially in places like Ashburn, Virginia, the biggest hub in North America for data centers. The one we just worked on was three stories. I'm guessing the next one will be five stories. I think this is a transition in the market to look at distinct ways of doing it," he said.
The preferred lithium batteries used for data centers is lifepo4 lithium iron phosphate battery packs. These cobalt-free batteries have good power capacity, but do not store quite as much energy as the cobalt-containing cathodes of the chemistries used in electric vehicles. lifepo4 lithium iron phosphate battery packs are considered safer for flammability than their higher capacity cousins.
Ironically, as lithium-powered EVs are becoming more popular and making lithium ion batteries more mainstream, they are beginning to use up much of the available lithium supplies. "Now that the EV market is starting to take off, battery makers are shifting all of their resources there,' said Lynn. "The lead time for the UPS market is (now) over 30 weeks, and this market expects 4 to 6 week deliveries. So they are starting to run into a big supply issue. Most of those guys (battery manufacturers) are running into the same thing. Nobody has enough capacity to compete with the EV (demand)."
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