wholesale discount battery: 二月 2012

2012年2月27日星期一

Large-capacity battery energy storage in wind power (1)

1 Introduction
    The power system is a dynamic equilibrium system, power transmission and distribution of electricity must always maintain a balance. Wind energy is an intermittent energy, and wind speed forecasts there is a certain error, wind farms can not provide a steady power, power stability and continuity is poor. In traditional power system, any small perturbation caused by dynamic imbalance in power will result in oscillation unit, large-capacity energy storage systems and wind turbine combination, can effectively suppress or mitigate the volatility of wind power to reduce the wind power the grid. As long as the energy storage capacity is large enough and fast enough response speed, you can achieve complete balance of power in any case, this is an active stability caused by the idea of the power system [1]. The stability control device and energy storage technologies do not have to work together and the generator excitation system, therefore, can be easily used in the system for the suppression of the oscillation is the most effective parts. Control the amount of such a stability control device can act directly on the source of the cause system oscillation accurate compensation of the imbalance in power, can be less or even without considering the system running status change on the control device to control the effect of The device parameters tuning is very easy for the robustness of the system running status change is also very good.
    2 battery energy storage technology development in the world
    In recent years, developed countries such as Japan, the United States and the European battery energy storage technology into a larger, leading technology. Japan to lead the world in research and application of the sodium sulfur battery, Japan insulators (NGK INSULATORS) 300 MW NAS battery systems and central monitoring system order from the Abu Dhabi Electricity and Water Authority. Panasonic and Matsushita Electric Works, and the Danish power companies the SEAS-NVE 'jointly launched in 2009 aimed at smart grid demonstration experiments. Toshiba announced in 2010, received orders for Okinawa Electric Power in the autumn of 2010 in the Miyakojima Islands microgrid empirical test "equipment, will build a new generation of apple laptop battery balance of power changes taking renewable energy load power system . Sanyo Electric is also Western Canada Green Energy Park "into the 1.5 MW; h lithium-ion battery, the other manufacturers are also actively involved in battery energy storage projects. Aspects of Europe and the United States, 2001, Canada, VRB Power Systems Inc. in South Africa built a 250 kW vanadium flow battery energy storage demonstration system to achieve the commercial operation of the vanadium redox flow battery energy storage. VRB Power Systems Inc. of Australia Hydro Tasmania on KingIsland company to build wind power supporting all vanadium flow storage hp laptop batteries was completed in November 2003, the system storage capacity of 800 kW ·; h, the output power of 250 kW. In February 2004, VRB Power Systems, Inc. has built a castle Valley, Utah Pacific Corp output power of 250 kW, the energy storage capacity of 2 MW; h vanadium redox flow battery energy storage system. The end of 2006 the company began the international so far for the Irish construction of the maximum rated output power of 2 MW (pulse output power of 3 MW), energy storage capacity of 12 MW; h vanadium redox flow acer laptop battery energy storage system. U.S. Japan's Sumitomo Electric Industries and VRB Power Systems Inc. technology, namely the establishment of demonstration runs of 2 MW and 6 MW of all vanadium flow storage batteries.
    Innogy, the UK in August 2000 to build the first commercial-scale energy storage peaking demonstration power plant with a 680 MW gas turbine power generation field supporting the energy storage system storage capacity of 120 MW; h, to meet 10 000 families a day of electricity demand.
    German the EVONIK industrial shares announced joint Daimler Motor Company R & D institutions to jointly develop a large capacity for wind and solar power, low-cost lithium-ion laptop battery stored power plant, the initial plan to build a power in Saarland, western Germany for 1 MW of energy storage devices. In large-scale battery energy storage technologies, we started late, with the developed countries there is a large gap: First, the equipment capacity is still small; short life of the equipment, inefficient use of; is the weak level of intelligent devices. China from the foreign advanced level gap in the energy storage applications is also a great abroad have been dozens of sets of energy storage power station put into operation, there are no large-capacity battery energy storage demonstration projects put into operation.
    At present, the application of the scale of China's replacement battery energy storage is very small, but with the gradual implementation of the adjustment of the national energy policy and energy conservation and environmental protection policy, the scale of its application is also expected to gradually expand. The Shanghai Municipal Electric Power Company has been building, including the the Caoxi station, avant-garde station, the silver station three energy storage demonstration power plant, electricity dispatch center directly through the power grid energy storage management system implemented on the storage station distribution around the unified control and remote monitoring. BYD in Shenzhen Longgang, a 1 MW (4 MW; h), energy storage power station.
    The national grid belongs to a new source Holdings Ltd of Zhangjiakou City Zhangbei development and construction of the nation's first scenery storage demonstration projects, the total size of the project for wind power of 500 MW, photoelectric 100 MW, 70 MW of energy storage. The Zhangbei optical storage project is the world's largest demonstration project of scenery storage Trinity, but have not yet entered into operation, has completed a project design, a construction work is in progress.
    The rapid development of wind power energy storage technologies
    Wind energy as a clean, renewable energy, more and more world attention. China's wind energy reserves are large, wide distribution, the only land-based wind energy reserves, about 253 million kW. In recent years, grid-connected wind power in China's rapid development. As of the end of 2007, total installed capacity of about 600 million kW. In December 2008, China's total installed capacity of wind power has more than 1000 million kW, ranking fifth in the world, as of mid-March 2011, China's total wind power installed capacity of 4450 million kW, wind power the construction of the largest global the first place. This also means that China has entered the renewable energy superpower ranks. Very broad prospects for the development of Chinese wind energy generation industry, is expected for a long time in the future will maintain rapid development, and profitability will increase steadily as the technology mature.
    To build the world's highest in China's wind power, wind power has always restricts the healthy development of China's wind power. Data show that China's wind power capacity is cumulative and net 3107 million kW, still refrain wind power grid This is due to the characteristics of wind power random and intermittent, resulting in frequent fluctuations of the output of the wind turbine, which wind power the output reliability is poor, the proportion of wind power is too large, make the grid frequency modulation, peaking increasing pressure, as well as the grid long-distance transmission of technical requirements and operating costs increase sharply. Therefore, large-scale wind farms and network access operation of the power system has also brought some new problems:
    1) the randomness of the wind power and uncontrollability to power system planning and stable operation has brought new challenges;
    2) the wave characteristics of the wind power and the volatility characteristics of the grid load is difficult to more prominent peak load regulation and a higher demand for peaking capacity and speed of response;
    3) Due to the change of wind speed, the wind turbine is easy to cause the grid voltage and power fluctuation, as well as by reactive power and voltage control and power quality problems.
    Wind power has the conflict between the intermittent and volatility of the power system needs real-time balance, the grid-connected wind power fluctuations need to balance through the regulation of conventional power and energy storage system, as long plagued the main problems of wind power. Impoundment storage power station due to geographical limitations, does not have universal availability, therefore, the introduction of large-capacity camera battery energy storage device can be universally applied to compensate for fluctuations in wind power to the grid to bring all kinds of wind farm The effect is an appropriate choice of technology [8]. Through the coordination of energy storage systems and wind power systems, not only effectively reduce the impact and influence of the wind power system, improve the consistency of the wind power output forecast, protect the credibility of the power of electricity supply, but also to reduce the reserve capacity of the power system and improve the economy of power system operation, while improving the power system the ability to accept wind power.
    4 requirements for wind power at home and abroad
    More and more large and medium-sized wind farms have been built and put into operation, Wind Power gradually increasing proportion of wind farm power fluctuations will affect the local grid power quality, voltage fluctuation and flicker. Will have a significant impact on the local grid, in severe cases can lead to serious accidents [9,10]. The wind farm grid technical requirements of the wind farm active power change requirements, such as:
    1) Eltra and Eltra & Elkraft requirements and wind farms l min, the output power change is less than 5% of the maximum power equal to the wind farm. The wind farm control system to ensure that within 2 s down to less than 20% of the rated power Eltra & Elkraf, requires per minute rate of power change of the wind farm within 10% to 100% adjustable;
    2) E.ON and ESBNG requires wind farm output power at any time less than its registered capacity. E.ON per minute power requirements reduce at least 10% of the rated capacity, ESBNG requirements related to the 15 min power variation of the wind farm the size per minute power change is less than 100 MW wind farm is less than 5%, less than 200 MW wind farm power changes of less than 4% of the rated capacity per minute, less than 2% of the rated capacity greater than 200 MW wind farm power change per minute;
    3) Scottish grid technology requirements can exceed the rated power wind farm output power within a reasonable period of time;
    4) China State Grid Corporation of the provisions of the Wind Farm 1 min and 10 min, the rate of power change, the rate of change of the installed capacity of wind farms, such as less than 30 MW wind farm 10 min, the maximum variation is 20 MW, 1 min, the biggest change is 6 MW;
    5) the requirements of Scottish wind farm starts and stops to meet the requirements of the voltage quality of Scottish also asked to stop to meet the changing requirements of the maximum power from wind farms, and not more than 25% of the rated capacity can jump, and points within 30 min The stage gradually exit.
    Five large-capacity camcorder battery energy storage technologies for wind power steady
    Apparently active power of the most important means of regulation is energy storage, high-power, high-capacity storage system to stabilize the wind power fluctuations and intermittent. Energy storage capacity of the system reaches a certain size, the energy storage system and wind turbine combination, can effectively inhibit or mitigate the volatility of wind power, to reduce the impact of wind power on the grid [11,12]. Large-capacity battery energy storage technologies in wind power to achieve the following functions:
    1) smooth unit output: the combination of the battery charger energy storage system with wind turbine wind farm output, smooth perturbations of the fast wind speed, reducing the impact of wind farm output fluctuations on the grid, reducing the impact of wind power fluctuations on the grid.
    2) improve the consistency of the wind power output forecasts: Energy Storage as a tie to adjust the output prediction based on the wind farm output curve to optimize the output, improve the credibility of the wind power output.
    3) improve the ability of scheduling: energy storage system, you can control the active and reactive power of the wind power output for power peaking, wind power units to run as a scheduling unit cell, with the power system frequency control, fast the ability of the power response and other ancillary services.
    4) the peak transfer: high-power high-capacity energy storage system to the instability of wind power can be collected at the appropriate time to smooth the release, transfer peak, reducing the impact on the grid;
    5) ensure that the wind power generation system is a continuous and reliable power supply: when the environmental factors or external conditions change rapidly, the wind power generation system can not stabilize the output power of the stored energy in the energy storage system can produce a certain amount of energy and power supporting role, to ensure load sustained, stable power supply.
    6) system reliability and redundancy is greatly improved: multiple smaller capacity grid-connected inverters in parallel control run, making the system according to the characteristics of a variety of new energy power generation, and start a different number of grid-connected inverter control, the power generation efficiency of the system so that you can achieve optimal to further improve system reliability and redundancy will be greatly enhanced.
    7) so that the wind power generation has a greater impact on the schedulability: a simple new energy power generation system by environmental factors, therefore, unable to formulate a specific generation planning. If the configuration energy storage devices, can provide the necessary electricity at a particular time, without regard to the power generation unit power generation, new energy power generation system and grid connection, and fed to the grid, and can provide clipping emergency power support services. Just follow the pre-established power generation planning for power generation. The greater the capacity of energy storage devices, the scheduling of the system is free, you can get more economic benefits, but the greater the investment required, the key is to find the best economic balance point.
    6 Conclusion
    This paper reviews the development status of energy storage technology at home and abroad, the problems faced by wind power in the rapid development of the proposed high-capacity compaq laptop battery energy storage technology in the wind power system. Domestic and foreign research results show that the large capacity battery energy storage technology provides a wide range of storage features to solve the wind power, to improve power system stability, improve the quality of power supply of new ideas and effective technical support. Therefore, countries in the world, especially developed countries, are actively carrying out research in this area. We should take full advantage of the good opportunity of China's rich wind resources and power sector reform. Actively carry out research in this area, to provide new technology to support the efficient operation of the safety of China's electric power system. Large-capacity toshiba laptop battery energy storage technologies play an increasingly important role in the clean energy generation. The market potential is huge, has an increasingly important economic and social values.

2012年2月23日星期四

ACER Aspire 4736Z Laptop Battery Care Instructions

Your new battery comes in a discharged condition and must be charged before use (refer to your computer manual for charging instructions). Upon initial use (or after a prolonged storage period) the battery may require three to four charge/discharge cycles before achieving maximum capacity.
When charging this ACER Aspire 4736Z battery for the first time your computer may indicate that charging is complete after just 10 or 15 minutes. This is a normal phenomenon with rechargeable batteries. Simply remove the battery from the computer and repeat the charging procedure.
It is important to condition (fully discharge and then fully charge) this ACER Aspire 4736Z battery every two to three weeks. Failure to do so may significantly shorten the battery's life (this does not apply to Li-Ion batteries, which do not require conditioning). To discharge, simply run your device under the battery's power until it shuts down or until you get a low battery warning. Then recharge the battery as instructed in your user's manual.
If this ACER Aspire 4736Z battery will not be in use for a month or longer, it is recommended that it be removed from the device and stored in a cool, dry, clean place.
It is normal for a battery to become warm during charging and discharging.
The milliamp-hour (mAH) rating of the eBatts.com battery will often be higher than the one on your original battery. A higher mAH rating is indicative of a longer lasting (higher capacity) battery and will not cause any incompatibilities. An eBatts.com battery will, in most cases, outperform the original by 30% to 50%.
Actual battery run-time depends upon the power demands made by the equipment. In the case of notebook computers, the use of the monitor, the hard drive and other peripherals results in an additional drain upon the battery, effectively reducing the battery's run-time. The total run-time of the battery is also heavily dependent upon the design of the equipment. To ensure maximum performance of the battery, optimize your computer's power management features. Refer to your computer manual for further instructions.

This Laptop Battery is also compatible with the following Models:
ACER
Aspire 4520 , Aspire 4520-5141 , Aspire 4520G , Aspire 4530 , Aspire 4530-5267 , Aspire 4530-5350 , Aspire 4535G , Aspire 4710 , Aspire 4710G , Aspire 4710Z , Aspire 4715Z , Aspire 4715Z-3A0512C , Aspire 4720 , Aspire 4720G , Aspire 4720Z , Aspire 4720ZG , Aspire 4730 , Aspire 4730-4516 , Aspire 4730-4947 , Aspire 4730Z , Aspire 4730ZG , Aspire 4736 , Aspire 4736G , Aspire 4736Z , Aspire 4736ZG , Aspire 4740G , Aspire 4935G-644G32Mn , Aspire 5236 , Aspire 5335 ,

HP COMPAQ Business Notebook 6715b Laptop & Notebook Battery

6600mAh,9-Cell, 10.80V Replacement HP Compaq 6715b Battery,HP Compaq HSTNN-105C

This hp compaq business notebook 6715b battery is a rechargeable replacement battery for original hp compaq laptop computer.HP 6715b batteries are rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications.

Capacity : 6600mAh,9-Cell
Voltage : 10.80V
Cell Type : Li-ion
Color : Black
Construction : Made of highest quality cells!

HP 6715b Battery Details:

Brand new replacement hp 6715b battery in box, never used, premium quality.
100% compatible with OEM battery.
No memory effect. Chargeable even if it has not been used up yet.
Lithium Ion technology gives 6715b battery a long life, and light weight.
Smart device surge protection for over voltage, temperature and short circuit protection.
Strong built for heavy duty and long usage performance.
Correction:Capacity correction when fully charged, Automatic circulation ,Cells and voltage deviation
Function (anti-over current and anti-over voltage function) performance of cells test

Guidelines for prolonging hp 6715b battery life:

New hp compaq 6715b batteries are shipped in a discharged condition and must be charged before use. We generally recommend an overnight charge (approximately twelve hours). Refer to the user's manual for charging instructions. Rechargeable 6715b battery should be cycled - fully charged and then fully discharged - two to four times initially to allow them to reach their full capacity
Like many rechargeable batteries, The hp compaq Business Notebook 6715b batteries should be charged early and often. However, if they are not used for a long time, they should be brought to a charge level of around 40%–60%

HP COMPAQ Business Notebook 6715b battery tips
We should care HP COMPAQ Business Notebook 6715b battery To Get The Maximum Life Out Of It. It's a valid question calling for special attention since laptop batteries are usually expensive to replace.
First of all, how long should your battery last? 2-4 years is generally acceptable depending on how frequently you use and charge the battery. If you travel a lot and use and charge your battery frequently then you might only get a couple of years at the most out of your laptop battery.
HP COMPAQ Business Notebook 6715b battery are usually made with batteries. They also have a self-discharge rate of about 1% per day so you need to be sure to charge them at least once a month.

So how can you care for your battery to get the maximum life out of it?
Your new HP COMPAQ Business Notebook 6715b laptop battery comes in a discharged condition and must be charged before use (refer to your computer manual for charging instructions).
When charging HP COMPAQ Business Notebook 6715b battery for the first time your computer may indicate that charging is complete after just 10 or 15 minutes. This is a normal phenomenon with rechargeable batteries. Simply remove the battery from the computer and repeat the charging procedure.
Charge up completely, even if the battery isn't fully discharged, don’t run out of your HP COMPAQ Business Notebook 6715b Laptop Battery. laptop batteries work best when they are recharged while they still have 10 to 20% capacity remaining. So if you are using your notebook battery on your journey, try not to get in the habit of using the notebook battery until it has almost no charge.
Recharge the battery in your notebook using the AC adapter, whether the notebook is on or off.
When carrying the battery. Do not short circuit the terminals or store your battery pack with metal objects such as necklaces or hairpins.
Double your work time available without having to plug in to AC power.
Do not disassemble the Battery, the contents may be corrosive and harmful for your health.
If your HP COMPAQ Business Notebook 6715b Laptop Battery will not be in use it should be removed from your laptop and stored in an Anti-Static bag and in a dry, cool place.

The hp 6715b battery should be kept cool. Ideally they are stored in a refrigerator. Aging will take its toll much faster at high temperatures. The high temperatures found in cars cause lithium-ion batteries to degrade rapidly
When using a notebook computer running from fixed line power over extended periods, the battery for hp 6715b can be removed and stored in a cool place so that it is not affected by the heat produced by the computer.

This Laptop Battery is also compatible with the following Models:
HP COMPAQ
Business Notebook 6910p, Business Notebook 6510b, Business Notebook 6515b, Business Notebook 6710b, Business Notebook 6710s, Business Notebook 6715b, Business Notebook 6715s, Business Notebook nc6100, Business Notebook NC6105 Series, Business Notebook NC6110, Business Notebook NC6115, Business Notebook NC6120, Business Notebook nc6140, Business Notebook NC6200, Business Notebook NC6220, Business Notebook NC6230, Business Notebook nc6300, Business Notebook nc6320, Business Notebook NC6400, Business Notebook NX5100, Business Notebook NX6100 Series, Business Notebook NX6105, Business Notebook NX6110, Business Notebook NX6110/CT, Business Notebook NX6115, Business Notebook NX6120, Business Notebook NX6125, Business Notebook nx6130, Business Notebook NX6140, Business Notebook nx6300, Business Notebook NX6310, Business Notebook NX6310/CT, Business NoteBook NX6315, Business Notebook NX6320, Business Notebook NX6320/CT, Business Notebook NX6325, Business Notebook nx6330

2012年2月16日星期四

4400mAh Li-ion ACER Aspire 5740 Laptop Battery

Acer Aspire 5740 Laptop Battery (Li-Ion 11.1V 4400mah 6 cell)
This is a brand-new Li-Ion 11.1V 4400mah 6 cell replacement Laptop Battery for Acer Aspire 5740. This replacement Aspire 5740 Laptop Battery is 100% compatible and will meet or exceeds original specification. This Aspire 5740 replacement Laptop Battery made by Obat.co.nz has been tested for safety and designed for high performance.

We guarantee to offer one year warranty service from the date of purchase. Our replacement Laptop Battery for Acer Aspire 5740 is made with high quality cells, that allows every battery to have the highest capacity possible. Thus giving you maximum power and perfomance for your laptop.
Specifications
Compatible Brand Acer
Chemistry Li-Ion
Voltage 11.1 V
Capacity 4400 mAh
Cell 6 cells
Color Black
Dimension 208.20 x 44.94 x 19.90 mm
Weight 320 g
Warranty 1 year
Condition Brand New

aspire 5740 battery tips

Aspire 5740 battery life (and its recharge times) will vary based on many factors including screen brightness,applications,features,power management and other customer preferenes.It's a good idea to set screen saver blank to 1 to 2 minutes of your notebook and turn down the LCD brightness of your portable computer.
Avoid using a CD or DVD in your aspire 5740 pc.Optical drives consume large amounts of power to spin up CDs and DVDs.Copy the data you need on an optical disc to your laptop’s hard drive or a thumb drive before traveling.
Avoid very hot or cold temperatures.Extreme temperatures could effect Acer aspire 5740 battery's performance and can even cause permanent damage. Try to charge and use the battery at room temperatures.
A new rechargeable battery usually comes in a discharged condition.Therefore,you need to fully charge the aspire 5740 laptop battery before you use it.In addition,new battery requires two to three charge/discharge cycles before it can condition to full capacity.
For more instructions and tips,click Laptop Battery Tips.

Acer Aspire 5740 Laptop Battery Using Tips

1. Do not forget to take away your Acer Aspire 5740 Laptop Battery Pack from the device if you will not use it for a long time.

2. Do not modify or disassemble rechargeable Acer Aspire 5740 Laptop Battery.

3. Avoid short circuit of the terminals by keeping your Acer Aspire 5740 Laptop Battery pack away from metal objects such as necklaces or hairpins.

4. Quality - 100% compatible with original Acer Aspire 5740.

5. Do not expose this replacement Acer Aspire 5740 Laptop Battery to water or other moist/wet substances.

6. Do not incinerate or expose this Laptop Battery for Acer Aspire 5740 to excessive heat, which may result in an exposure.

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This Laptop Battery can replace the following ACER Machine Models:

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