|
21/11/2009 5:10 am Management of HEV in the high-voltage lithium-ion battery |
|
From lithium secure access to the largest energy and life require advanced electronic technology. For example, one requirement is that a bunch of batteries from the 100 series, each measuring voltage of 3.7 V battery. Responding to the common mode voltage of 370V and 100V common-mode rejection of switching transients (common mode switching transient)? For the EV (electric vehicle), HEV (hybrid electric vehicle) and UPS (UPS) application system design of Laptop battery management, we need to solve many problems.
How to make cell cars to become "green", why the big uproar in the lithium batteries? First, according to California Motor Vehicle Program (California Cars Initiative), using electricity to drive a car to cost the equivalent of 75 cents per gallon of gasoline. Therefore, a pure electric vehicles are lower daily operating costs. Secondly, if they want to drive above the speed of over 100 miles, there is still a gasoline engine, while the battery to increase the mileage of gasoline. In view of motor vehicles capable of storing energy to limit the driving distance. The use of large lithium battery battery can be charged to 8 hours to travel 100 miles. Energy equivalent of gasoline per kilogram of lithium-ion batteries 80 times and a few minutes to fill a fuel tank. So long as there is enough coffee, you can always drive. However, the internal combustion engine, only 30% efficiency at maximum speeds, the average yield is about 12%. With the IBM ThinkPad R40 battery during acceleration torque (couple), and the recovery of braking when the Joule (Joule), means that petrol engines can reduce stroke, and greater efficiency, it is actually the number of miles per gallon may be doubled.
Car batteries in Canada The third reason is to reduce emissions. A gallon of gasoline produces 9 kg of carbon dioxide. Clean energy (like wind) is converted into electrical energy that emits no carbon dioxide. Therefore, the battery is to increase the price of mileage and reduce the unit weight of carbon dioxide the key to mileage. Battery to store more energy per kilogram, more efficient battery. Car models today in 2009 uses a nickel metal hydride (Ni-metal hydride) batteries. Passage density lithium-ion battery energy can be increased by 150%. 2012's style, most hybrid cars and trucks will use the technology of lithium batteries.
Automotive how to use the lithium battery
When considering the use of lithium batteries for cars, we should analyze series hybrid, parallel hybrid, pure electric and other types of diagrams automotive power transmission block. Fortunately, however, that the lithium batteries similar vehicle. Building block is a group of 100 to 200, from 2.5 to 3.9 V, 4 to 40Ahr Dell Latitude D620 battery series. The DC power source to drive a car 30 to 70kW. The battery voltage is high, so a certain level of power (power), low current average. Under the current needs of smaller cables, light weight and low cost. Battery Pack should be available under the peak of 200A current, and can be quickly recharged. In other words, the battery needs a good energy density at the same time, also requires a power density well. Large systems (such as buses and trailers) to use up to four parallel 640v battery.
Li-ion battery pack design problem is how the performance, economy and security balance. The two main variables in the design of the battery and circuitry of cell Battery Management. For example, suppose you want to develop an electric vehicle that can travel 100 miles per charge, using the battery can be used at least 10 years before buying or leasing a new hp 417066-001 battery. To meet the 10-year-3650 sub-target charge cycle, you can only use part of the battery capacity (eg 40%). To minimize the cost of vehicle you want to use the lightest battery while the battery is the most expensive battery. To achieve maximum performance, the battery must withstand the peak load and discharge current of 200A. More importantly, the rapid oxidation of chance events (eg fire) must be less than from gasoline powered cars.
Traditional lithium-cobalt (laptop and similar products) has a high energy density, but when the failure of an insulated material, it may be damaged by heat (thermal runaway) phenomenon. The manufacturers of lithium batteries used lithium - iron - phosphate (lithium iron phosphate), manganese lithium (lithium-manganese), and lithium titanate (Li-titanate) and other materials, even if the piercing of the packaging is also able to maintain thermal stability. They form as a prism, as a small silver baking cakes, and low ESR (Equivalent Series Resistance) value can withstand strong currents. They store less energy than lithium laptop battery cobalt, but still better than the nickel-metal hydride device, and, if carefully manage their charge-discharge-bit accurate, it may be 10 to 15 years.
State Load
Battery Monitoring System is now starting to play a role, because they can monitor the toshiba PA3191U-2BRS battery state of charge (state of charge) to determine the cost and performance of the battery. If you know the battery state of charge, you can get more of each of the battery power, use less battery cells, and try to lengthen the lifespan of these batteries at most. In laptops, this work is to monitor the battery voltage, and the statistics of the battery Coulomb 4-8. Voltage, load current, temperature, and some math values are used to indicate fresh, a good indicator. Unfortunately, you can not calculate a number of Coulomb car because the battery is the engine of a motor rather than a motherboard. Peak current of 200A, which are among the peak is low (low level) of idling.
In addition, you may want to cascade 96-200 cells, they are divided into 10 or 12 groups. The aging of these cells at different speeds, several batches, and will change with temperature. These factors mean that they have a different capacity, while the same number of Coulomb charging batteries is almost bit different. For these reasons, the vehicle monitoring system for the battery to concentrate on the battery voltage. You have to accurately measure the voltage of each battery, then the value of current and temperature measurements to determine the ESR readings and volume changes. You want to keep the estimated position of each cell, quasi-charge. If some of the battery-charge of a lesser charge, we must adjust the battery charging various imprecise, such that use of discharge (or equilibrium passive) him; another way is to re-allocation (equilibrium or force) load. When the battery minimum state, the battery power exhausted.
Engineers need to understand how to accurately measure tension. The initial goal is to understand the range from -20 to 80 ¡æ temperature, 1% in the state of charge. |
|
22/10/2009 9:57 am 2012 will bring new energy demand for lithium battery separator turned 10 times |
|
According to the Investment Adviser Lee Sheng-mao analyst with the automotive industry, noted that with the gradual development of new energy vehicles, the future demand for feed materials of lithium will be activated. Right now, even if electric bicycles in China, motorcycles and other light electric vehicles, keep the volume has more than 50 million, ranking first in the world, which are derived are also a large number of Laptop battery manufacturers. However, some key technologies, there is always a foreigner to master, lithium batteries with the electrolyte membrane, is an example.
Lithium-ion batteries with an operating voltage due to the high energy density (lightweight), no memory effect, the long life cycle, and free of pollution, etc., all kinds of electronic products to become the source of main supply, global demand for lithium-ion batteries that average annual increase of 30%, and a huge market, lithium present in China, producing ion batteries have represented more than one third of the world total and more than 100 manufacturers of lithium lithium-ion battery materials, the demand for lithium-ion IBM ThinkPad R51 battery of positive and negative electrodes, electrolyte and polymer insulation material composition of the membrane, divide the Department of Li-ion materials technology , barriers to higher value-added material, the gross margin is generally 70% or more, which represents 20-30% of the cost of lithium batteries. Isolate film lithium-ion battery commonly used in polypropylene (PP), polyethylene (PE) single layer microporous membrane, and the PP and PE by the multi-layer composite microporous membranes as a separation membrane, polypropylene, for example, his raw material costs about eight thousand dollars per tonne, but its transformation into a membrane, its value can be up to 300 yuan / ton, a substantial appreciation of several hundreds of times.
From the point of view outside a regular white plastic, no significant difference, but in the structure of lithium batteries, the diaphragm is a key component of the inner layer. Performance membrane, a direct impact on the Dell GK479 battery capacity, the cycle efficiency, and safety features such as. Fosugufen Chief Engineer, Jin Hui, Wu Yao Kan stressed that as a high technological content, divide the localization of products of the last lithium, and has mastered the basic technology of film. Currently, the national annual demand is about 130 million square meters, while firm Jinhui 1,200 million square meters.
According to the Investment Advisor "issued by the new energy vehicles in China during the 2008-2010 Industry Analysis and Investment Consulting Report, noted that by 2012, if the formation of a million hybrid vehicles the size of the battery separator need nearly 400 million square meters, while the current domestic divide the total production capacity is only 130 million square meters. Batterie future may be double the growth -type, needs to be 10 times more cell phone battery.
In the thin film of polymer film solar cells with a wide range of applications in the same space, development and production of film separation of the lithium hp PB992A battery, the solar photovoltaic system for the new material is a film in Branch of the Industrial Modernization. However, domestic firms can produce only a handful of membrane, which has been subject to foreign imports, high prices, it is lithium a major cause of high production costs, of course, affect the application of lithium , one important reason.
Currently, domestic firms capable of producing membrane-star single technology source, Jinhui High-Tech 2 technology market is relatively well established, a serious shortage of supply, more dependent on imports, the market dominated by the Japanese Asahi Chemical Industry, Tonen Chemical, and the United States Celgard dominate. Membrane-type "high-tech features high capital, and the project cycle is very long, enthusiastic risk of higher capital to invest in domestic companies is not high.
Expected global demand for polyethylene, polypropylene and aromatics demand and other major petrochemical products will be higher than the global GDP 2-3% growth, while the highest rate of growth asia. To this end, the world oil and petrochemical companies, ExxonMobil Chemical is to invest actively in order to meet this growing demand. With the construction of a permanent joint venture in Fujian, China and the construction of a petrochemical plant in Singapore to become a world-class petrochemical plant to increase production capacity has more than doubled. Meanwhile, Saudi Arabia and Qatar is also promoting projects to large scale investment, and Korea, the construction of a factory new lithium sony VGP-BPS2A battery separator.
Although the development of the distribution of power lithium battery industry on the promotion of great importance, but in terms of the investment declaration, the diaphragm with a typical "high-tech features top capital ", and the project from start to produce the duty cycle is very long, more investment risk, to some extent, hindered domestic firms in this important area of investment. |
|
20/10/2009 7:00 am EV industry wars: Future battery demand will reach 570 billion |
|
Such as the United Kingdom, Japan, the United States, Germany, Norway, France and other advanced countries, have come after the development of electric vehicle industry, the two sides are also to join the industry as early as this, the future market will become a trend! However, because the original electric car industry and auto industry has many differences, including electric motors, control modules, Laptop batteries, etc., but also attracted many branched out into technology industry, and its most influential battery technology, but also by these the advanced countries as the number one key to development.
Current electric cars anxious to break the bottleneck lies in the performance of the Dell Inspiron E1705 battery's own life, so it is no doubt of the need to invest in electric vehicle development costs, the core of the largest, because the future of those who can make a breakthrough in life, will also be in the market place ! With the success of Greenland and the large number of electric vehicles to detect the rare earth elements required for the material, the previous output of rare earth elements of concern to great powers - China will monopolize the market's concerns can be appropriately resolved, the cost of production of electric vehicles, the future also will be re - has fallen.
However, there is a real Li-ion hp PB994A battery production technology with very few plants, while the Taiwan Cement Investment by the domestic energy yuan technology, it is smooth as BMW (BMW) electric vehicle battery supplier, is also to maintain a close with the Yulon Group cooperative relations, currently the world's 10th largest crowd in the battery status of the core plant, the future will be successfully promoted to the top 5 major.
Integrated current global lithium battery factory, the production output is about 5.7 billion to count, if the increasing popularity of electric cars as the future replacement of all engine power for electric vehicles if the vehicles that needed capacity will also be up to 570 billion stars, so apart from Taiwan's government actively promoting the electric vehicle industries, North America, subsidies for up to 24 billion U.S. dollars in an attempt to become the largest suppliers of lithium VGP-BPS2B batteries, and even across the continent, by virtue of the world's first stomach volume of car sales, will also be In the four years invested 50 billion yuan to promote the popularization of electric vehicles; appears in this electric car wars, in addition to environmental protection issues at stake, but also an important future context of national economies. |
|
16/10/2009 11:15 am The instructions for use laptop battery |
|
1. How to charge your new battery?
Usually none of the new Laptop battery is fully charged, in using the new laptop before the battery needed for its rechargeable (please refer to the equipment, pricing Manual). Start using a new battery or batteries to stop using for a while, it takes three to four times the battery charge and discharge cycles before achieving maximum effect.
Sometimes when charging the laptop battery for the first time, when the 10-15 minutes after the load, fire equipment to indicate the battery is fully charged, this situation of "rechargeable battery" is Normally, you simply remove the battery from the device and recharge the battery can be.
The most important point is that every month, charging the Dell Inspiron B120 battery completely discharged. The simplest is to discharge the battery to open the device until the battery is so far, and then depending on the device user manual can recharge the battery.
If you do not use the battery more than a month, the construction means that you remove the battery from the device, stored in a cool dry place. Discharge load, battery temperature will rise, it is a normal phenomenon. Battery fully charged if the posting period of time, the battery will discharge naturally, so when the storage battery for a while before using always fresh.
2, the new battery can not charge, is that the battery problem?
Generally not, the equipment for the first time to charge the hp F4812A battery because the voltage and current May cause instability when the battery in half (sometimes more, sometimes less), equipment to refrain continue to charge the battery, if this happens Please do not worry, you can simply remove the battery from the device and re-re-charge. The first rechargeable battery may need repeated the process several times. Please be assured that this is normal.
3, the battery charging time required to complete active the new battery
We advise the first battery of your laptop at least 12 hours, the hours of digital battery should no less than 14 hours.
4, turn off the laptop charging, disconnect the power load his way.
5, the battery must be fully load and unload as much as possible to avoid full charge the battery without the use of electric charge or discharge end, so as not to affect A1045 battery life.
6, to avoid the impact of man, demolition, fall, heat or short circuit.
7, free use of special equipment.
8, should avoid high or low environmental temperature, the use of cell phones. |
|
07/10/2009 5:56 am Six clever moves ensure safety of laptop battery |
|
Recently, the increasing incidence of quality laptop battery, there are many manufacturers to recall, consumers using mobile phones is also hard work, skating on thin ice. Now that the battery is really, as some items was filled with exactly the same as "bomb" How do we not leave a laptop so dangerous? To do this, do not forget to visit one of IT experts dedicated to expert advice on the matter. Experts estimate that for a long period of time, books have yet to build on the work of mobile batteries, battery-free to ensure the quality of books circumstances, the proper use of batteries is also very important and necessary. Question 1: For the first time to charge the battery if you want more than 12 hours? Experts have explained, consumers buy books machinery inspection, sales personnel may be informed for the first time need to pay more than 12 hours to fully activate the Dell Inspiron 8600 battery. But in fact there are only a few years, nickel-metal hydride battery before it takes so long, the battery is fully activated, the battery current books are lithium-ion battery, the internal management are equipped with a chip until the battery voltage to rated voltage at both ends of the chip on the circuit will cut the load and continue to charge only a waste of time and energy. Question 2: Use an external power supply, it is necessary to remove the battery? Expert explanation: many of my friends as an external power source, hoping to drain the battery as this will prolong battery life. In fact, it is not necessary to do so if the battery is fully charged, even if it does not remove the battery you will not be affected leading to charge over the battery and the health of the battery, because it is an escort battery management chip it. If you remove the battery and some books, hardware systems fail at full speed running, racing at high speed application level software significantly. Besides, if you encounter a sudden power outage, consumers have already removed the battery, then there is no way to save the information being processed in. Question 3: In the long term will not remove the battery, either to prolong battery life? Expert explained: Because of the characteristics of its lithium it is determined, in fact, around the production line of lithium batteries, the aging process has already begun. This may explain why once the books can not charge the sony VGP-BPS5 battery, the same three years will be completely scrapped. A point lens, batteries and ink cartridges are consumables, like, you can not expect the battery to the same material as books of general interest can be used for many years. Question 4: The books do not use the battery if the long term, how should it be stored? Expert explanation: If the battery does not use long, it is recommended that consumers of battery power will be held for about three or So Into, then use the battery waterproof oiled paper wrap and store them in the sun can be direct, and the cool, dry and ventilated. However, these methods are merely slowing the pace of aging batteries and do not completely prevent aging. Question 5: How long a battery charge and discharge books better? Expert said: Friends do not use the battery, the proposed monthly cycle (that is to say, loading and unloading process) it is better he goes or lithium-ion activity and loss accelerated aging, but also activate the part of the activity is very ion. Question 6: Is change battery for batteries OK? Expert explained the replacement batteries are also possible. As the price of the original battery is very expensive, some consumers choose to replace the BTP-43D1 battery end of life, after which the batteries, the new battery used to reach the goal. Replacement batteries for the thing, it is recommended that the selection of high-capacity, best brand of batteries. |