Attaches great importance to the global climate change and carbon reduction trend in renewable energy, electric cars, as well as the promotion of smart grid has become an international trend. Also led various large-scale energy storage and power battery market. Battery materials in Japan, buttressed to Cell’s technological advantages in the development of large-scale energy storage quite positive. A 2009 deployment position, the nearly 90% of the energy storage in Japan are set in, as shown in Figure 1. The Battery Japan in the show, many manufacturers have exhibited a variety of large-scale energy storage battery. Moreover, in addition to large-scale energy storage, the text will be referred to other new trends in technology and product applications.
METI to apply to various types of large energy storage battery, points out the focus of future technological development. In addition, and add “technical difficulty”, “charge and discharge rate”, “price” to further clarify the characteristics of various types of energy storage batteries. Japan’s industrial economy for the province of large energy storage battery options related mainly nickel-hydrogen batteries, sodium sulfur batteries, lithium ion batteries, super capacitors. Present the case of the actual deployment to the highest percentage of sodium sulfur batteries, estimated in 2010, about 64% of the world, nearly 160MW of capacity deployment.
In addition, other cells have different characteristics, such as: have a price advantage of the nickel-metal hydride batteries, the super high-speed charge and discharge edge capacitance. The lithium-ion battery, there may be extensive use of the car battery under the low-cost through economies of scale pull into the large energy storage applications. In addition, in this exhibition, we also found that some vendors have applications in large-scale lithium-ion battery energy storage. Overall, each type of batteries have their own advantages and disadvantages, its characteristics must find a suitable energy storage applications.
(A) Shin-Kobe Electric (Shin-Kobe Electric Machinery Co.)
Shin-Kobe Electric, Hitachi manufacturing department is responsible for the production of industrial lithium battery division. The display in the large energy storage battery is more special, LL-W type of large lead acid storage battery. This module Besides general storage function, but also can be used to ease the wind power system activated, the resulting system instability. Overall standard size 437 × 799 × 500 mm, voltage of 8V, the current up to 1500Ah, electric capacity of 12kWh, priced at 400,000 yen. A single branch about 2MW wind power generation group based around electric devices need 1.3MWh reservoir, so the overall projected LL-W module, about 432. And the Kuroshio current (Kuroshio) wind power companies have actually set up in Aomori Prefecture goshogawara city to match the total 16MW of wind power.
In addition, the Shin-Kobe Electric is also responsible for the storage of display the battery power module-LL (available for solar or wind power) modules and LL-S (for solar) module. Different from the LL-W-type module is configured to wind or solar 99kW 100kW of power generation equipment, the will with 584kWh energy storage battery, converted into the module takes about 292 LL1000, the overall battery energy storage equipment, build, budget of almost 6,000 million yen.
(B) ELIIY POWER
ELLIY POWER is in Japan, quite a large lithium-ion batteries are promising energy storage company. First by the Keio University in 2003 in a ELiica electric vehicle project initiated and nearly 30 companies one after another joined in this project. Later in 2009, from Sharp, Japanese housing industry and other enterprises to raise funds for the establishment of 10.16 billion yen, and publicly traded. And in the same year announced the establishment of lithium-iron battery technology will be used for home and factory and other large storage needs. Which will be Sumitomo Osaka Cement (Sumitomo Osaka Cement Co., Ltd.) Lithium iron phosphate cathode material provided powder. The Sumitomo Osaka Cement, lithium iron phosphate in the bullish outlook, will significantly expand production capacity, expected in 2011, the lithium iron phosphate from the original 1.5 million tonnes, a substantial increase to 1,000 to 2,000 million tonnes.
Figure 4 for this developing field ELIIY POWER shown large energy storage related systems. The main battery module, containing four lithium batteries Cell. Module specification for the 192 × 175 × 128 mm, weighing about 2kg, the energy density of 91 Wh / kg. Figure 4 on the left of the EPSS 8kWh system requires 8 modules.
ELIIY POWER 2010, will produce 200,000 lithium-iron battery Cell, mainly for large-scale energy storage. In addition, the lithium-iron battery energy storage module in practical settings, the majority of working with local governments, set in schools, local administrative institutions, other private adoption rate is very low.
(C) MAXWELL
MAXWELL, in this exhibition, the exhibition 3C and hand tools, many of the lithium-associated module.
Most eye-catching, comes as a super capacitor used in large-scale energy storage module. This BMOD0063P125 module, due to the characteristics of high-speed charge and discharge. Application of the following two conditions. First, the general large-scale wind power and lifting equipment, this module can be launched to provide the required high current moment. Or when a large number of power generation currents, this module can be follow-up storage device buffer.
In general, single-group 2MW wind power generation equipment, just need a super-capacitor module. This module, for example, contains 18 super-capacitor Cell, the overall module size, as shown in Figure 6, size 619 × 425 × 265 mm, voltage up to 750V, maximum current of 750A. But the unit price is quite high, about 405,000 U.S. dollars.
(D) others
Other large energy storage battery module makers have related products on display. Large energy storage battery option will be to compound combinations. In general, large-scale renewable energy storage device and carry quite close. Operation of renewable energy power generation, for energy storage devices, also have different functional requirements. To wind power, this can be divided into “instant activation” and “Hang Time Energy Storage” in demand, as shown in Figure 7. The “instant activation” of the demand, the attention is the instant charge and discharge energy storage devices and high security. The “permanent storage when” the focus is the stability of stored energy and lower security requirements.
In the exhibition of large energy storage battery related to the process of inquiry, the whole unit can be found in the gap is quite big. Therefore, we can expect large-scale energy storage to build the future of the process. Will be a combination of hybrid batteries.
Currently speaking, the instantaneous charge and discharge efficiency, super-capacitors, or preferred, but the unit price close to NT 10 million. May make a single renewable energy devices, will only carry a super capacitor module. In addition, very recent topic of ternary cathode material of lithium battery vehicle, in its performance under high efficiency may also be used in “instant activation” requirements.
Finally, in “Hang Time storage” aspect, in the setting of limits, the energy requirements and battery performance is not as harsh automotive lithium batteries. At present, we find that firms tend to use less expensive battery types, such as lead-acid batteries, nickel-hydrogen cell. The lithium-iron batteries, lithium batteries are hoping in the car driven by economies of scale, the unit price can be lowered, to apply to large-scale energy storage.