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1, lithium-ion battery separator Overview

With lithium batteries with high energy density, long cycle life, light weight, small size and other characteristics, but also a reliable, safe and can quickly charge and discharge, etc., to become the new power technology in the recent years, the hot spot of research in the field of high power and high-energy folk reserved. In the structure of the lithium battery, the inner membrane is a key component of the. Diaphragm plastic film is able to isolate the Laptop battery positive and negative, to prevent short circuits; also be overheating of the battery, through closed-cell function to block cell in the current conduction.

Depending on the physical and chemical characteristics, the lithium battery separator materials ion can be divided into: film weaving, non-woven membrane (non woven), microporous membrane, and composite membrane, paper separator material various film categories. Polyolefin materials have excellent mechanical properties, chemical stability and relatively inexpensive, and therefore, polyethylene, polypropylene, microporous polyolefin membranes for lithium-ion batteries will be used as a research and early development of lithium – ion IBM ThinkPad T41 battery separator. Today, the marketing of lithium-ion battery separator is still microporous polyolefin membrane. In recent years, solid electrolytes and gel began to be used as a specific component, while playing the role of electrolyte and battery separator is a new technology.

Cost Li-Ion Battery Battery separator reflect the cost of a / 3. Membrane determines the performance of the interface structure of the battery resistance and so a direct impact on the battery capacity, the cycle efficiency, and safety features such as the membrane of high performance in the improvement of the overall performance of the battery has an important role. At present 60% to 70% of the market for membranes, especially in wet bi-oriented process, because the wet, bi-lateral vertical stretch more balanced. It is mainly used for the method of high-end diaphragm wet, dry, has been applied in the low range.

2, diaphragm production process

The current market-based lithium-ion Dell Inspiron 1420 battery separators are mainly made of polyethylene, polypropylene based polyolefin membrane, including the PE single layer, single layer PP, three-layer PP / PE / PP composite film. Polyolefin membrane current process of production under dry and wet divided into two categories, while dry process design can also be decomposed into one-way and two-way stretching process.

Dry-way stretching process is the production method of hard-elastic fibers were prepared by a low degree of crystallinity of highly oriented polypropylene or polyethylene film, high temperature annealing to achieve a high degree of crystallinity of film orientation. This film is stretched at low temperature, before the formation of mania and other defects of micro-enterprises, and then opened under high temperature so that the defects form a pore. This approach was first seen in USPatent3426754 Patent U.S. Celanse 1970 for the production of mono-layer membranes of porous polypropylene. The process after decades of development in the United States, Japan is already very mature, and now the U. S. Celgard Inc., Japan’s use of these boats UBE unique production PP, PE, and three PP / PE / PP composite film. This method of producing the BATBL50L6 porous membrane has an elongated structure, because it covered a stretch event, the horizontal force of diaphragm relatively poor, but it is not conducted due to the transverse tensile, transverse almost no shrinking heat.

Due to the protection of foreign patents and constraints of intellectual property, the domestic one-way membrane traction determined by industrialization progressed very slowly. China has already started in 2004 in this patent relates to technology and foreign patents difference is that in the polypropylene has a crystallization promoting effect of adding nucleating agents, and agent additive for oil has accelerated the rate crystallization during annealing. The technology is now used in Hangzhou, a production line, using a method how to stretch the production of PP single-layer diaphragm, has made this type of membrane on the market.

Wet-phase method of separation is also known as the separation of thermally induced phase, the high boiling small molecules as pore-forming added to polyolefins to merge into a uniform, then the cooling phase separation occurs The stretch after the ecprice extraction of organic solvents with small molecules can be interconnected prepared material of the microporous membrane, the material widely applicable. Adoption of the law, a company representative Asahi Kasei of Japan, Tonen and the United States Entek, currently used primarily for single-layer membranes of the PE. Wet bi-directed path to produce the membrane after a double meaning because of tensile strength of high vertical and horizontal. China Foshan Plastics Group was established in 2004, using a wet process production of two channels by membrane stretch production line PE by the end of 2005 has started selling products on the market.

3, the major international manufacturers diaphragm

Portable power tools, mobile phones, laptops, video camera lithium rechargeable ion batteries, power tools, small batteries used mainly polyolefin membrane, technology and markets are already very mature, the largest supplier of Asahi (Asahi Chemical Industry), U. S. Celgard and Tonen (Tonen Chemical), Asahi Kasei 5 in the main supply to the membrane over Sanyo, while the Celgard and MBI is a leading provider of BYD; With Sony, SDI, LGC and other clients, Tonen Chemical to become the world This membrane third largest supplier. The United States and produced three UBE Celgard polypropylene / / polyethylene polypropylene (PP / PE / PP) composite film. This type of material characteristics of the membrane is its higher resistance, lower cost, but also in the temperature of the internal hp 367759-001 battery is high, PE melt at 130 ℃ or so, when, while the high melting point of PP (150 ℃ or so) to form the obturator membrane, so that the battery internal circuitry, greatly improve the safety performance of the battery, but the complicated manufacturing process, and these are particularly difficult to achieve Ultra-thin 16um. Asahi Kasei, Tonen, the United States Companies ENTEK such that only the polyethylene (PE) membrane. This type of membrane material because it is single-PE, and therefore the cost of production but the production of ultra-thin membrane under specific conditions 16um, so popular with major battery manufacturers such as Sanyo, Sony, Panasonic, Maxell, etc. favor.

4, the internal status of development of membrane industry

With the development of lithium-ion battery industry, the market on the separator internal lithium battery lithium battery has gradually entered the ring, Xinxiang, Henan, China and the Sino-Kuwaiti Douglas.Ryan Technology, Foshan Jin Hui Hi-tech Taiwan and raised the money represented by the manufacturers internal lithium ion toshiba PA3421U-1BRS battery separator to grow rapidly in the years, the diaphragm, compared with imports of their products, the import price gap is just 1 / 3 ~ period from 1 / 2 mineral products is also relatively short, but the thickness of the inner membrane, the strength, the absorption hole can not be get the overall balance, and batch production volume is less stable, manufacturers of lithium battery internal chose the great majority of the imported membrane. Therefore, research and development costs, production process is simple, the adequate opening size, high porosity, mechanical strength to meet the requirements of the porous polymer separator to improve battery performance and reduce costs Battery has an important practical significance. How to further improve the membrane quality indicators is the battery industry in China is now pressing problems.

5. Lithium-ion battery development trends of separation

Battery separator is mainly the development of lithium-ion batteries with the changing needs and continue to grow, in terms of volume, lithium-ion batteries are moving in the small and large two distinct meanings. In some, such as mobile phones, digital cameras and other electronic products to meet the beautiful and simple formula to bring the application on the factory batteries apple A1060 battery was very low. In pursuit of high energy density, the small size of the electrode can accommodate more equipment, battery manufacturers are seeking to divide the thickness of the thinner, the better. Small cap is a challenge because of the need to make a thin membrane, but to be able to maintain the capacity of the original battery, the cycle efficiency, and safety features and more power, more design easy.

In contrast, electric bicycles, electric vehicles and power tools used by battery power, to achieve high capacity, high power, usually a battery needs to use dozens or even hundreds of batteries to the concatenation. Because lithium batteries have the danger of explosion, the safety diaphragm is important. Due to become increasingly large, technically demanding more efficient and reduce emissions of greenhouse gas emissions, higher power.

What is hydrogen fuel battery? 

Junior high school chemistry class, we experimented with electrolysis of water, electricity and water solution and broken into hydrogen and oxygen. The fuel power generation hydrogen fuel battery is the basic principle of the reverse reaction of electrolysis of water, produces fuel Laptop battery is electricity and water. The specific reaction process as follows: hydrogen on the anode catalyst decomposed into protons and electrons, protons a positive charge across the membrane to reach the cathode, overcast with charged electrons in the external circuit to run, resulting in power. In the oxygen ions on the cathode catalyst and electrons, protons reaction mix in water. Battery by a large number of series such as fuel batteries, you can generate enough electricity to drive the car.

Hydrogen fuel batteries and normal batteries differentiated mainly due to: dry batteries, storage battery is a kind of energy storage is to store energy when needed and then released, while strictly speaking, is a kind of device for hydrogen fuel IBM ThinkPad R32 battery energy production, such as power plants, as is the chemical energy directly into electrical energy generating electrochemical energy.

Daimler’s fuel battery hybrid electric vehicle

Daimler in Germany in June 2009 from 7 to 11, held in Vienna, Austria, World Congress and Mobility & City Transport “, the first public bus hybrid fuel battery” FUELBATTERY Citaro hybrid. In the bus “Citaro” released a few months ago on a combination equipped with a diesel hybrid buses “Citaro G BlueTec Hybrid” hybrid system based on the class B “the same battery system fuel Dell Latitude D500 battery vehicle fuel. First, the production of 30, providing the company the leading European bus service, started in autumn 2009 as line coach in various cities has launched a large-scale test empirically.

4 bus Citaro G BlueTec Hybrid uses a series hybrid forms of power generation of 4.8 trips six cylinder diesel engines and anchored in the roof of the lithium-ion rechargeable battery, the front and the rear axle is equipped with a four wheel motors. FUELBATTERY Citaro hybrid motor and lithium-ion rechargeable battery devices shared by the electric subsidies, only the engine parts for the systems of fuel batteries. And the Citaro G BlueTec Hybrid, as the system of regenerative braking for charging rechargeable batteries, therefore, different types of terrain and traffic conditions, using hydrogen as fuel can be reduced by 10 ~ 25% . Currently, the company has not announced details FUELBATTERY Citaro hybrid performance index. Citaro G BlueTec Hybrid power output of 320kW motor, lithium-ion rechargeable battery weighs 350 kg, power output of 180 kW.

Motor fuel battery hydrogen GM

General Motors 2007 High-tech Energy Power Technology Show, General Motors, the last vehicle fuel battery – the Chevrolet Equinox and the Chinese public completed the distance “first zero” contact, which is vehicle fuel batteries in Asia for the first time show. After several years of joint efforts, GM’s Chevrolet Equinox is the fourth generation fuel hp OmniBook XE3 battery vehicles. With the market debut of the car Chevrolet Volt uses a common date, the most effective fifth-generation fuel technologies propulsion battery and lithium batteries. Which is the world’s largest manufacturer of car Although R & D and production models of the Toyota suffered sales pressure, but in most cutting-edge R & D provided a large number of automotive technologies?

Chevrolet Equinox fuel battery group, consisting of 440 serial composition of the VGP-BPS2B battery output to 93 kilowatts, 73 kilowatts in the car (100 hp) synchronous motor driven by a common 0, – 1 00 kilometers / hour to speed up to 12 seconds, while the first wheel models can reach a maximum speed of 160 kmh. The life span of 2 years or 8 million kilometers, through the insulation and ongoing programs and other aspects of a series of improvements that can be below zero weather to start and running normally, this is it compared to the previous model of important advances. Equinox Fuel storage device hydrogen consists of three 700 bar (1 bar = 0.987 atm), composed of top-storage tank of hydrogen pressurized tank of carbon fiber composite materials, the greater capacity hydrogen storage of 4.2 kilograms, which can support up to 320 km mileage.  

The real meaning of vehicle hydrogen fuel battery

Why GM cars fuel toshiba PA3383U-1BRS battery with hydrogen as a future direction, other than environmentally friendly, fuel battery vehicles to hydrogen fuel is the meaning of the automotive research and development will lead to major changes, this May be the biggest opportunity in the history of automobile production. Since the adoption of electric propulsion, advanced safety technology and cable car, its mechanical design can be greatly simplified, according to a popular saying: “Spare fuel hydrogen vehicles and components can be reduced to this d ‘tenth. ” It is a terrible thing, but surprisingly, he makes changes that the Internet on the computer industry as a great shock.

Chevrolet Sequel For example, in the absence of engine and gearbox complex, it can put all the power components arranged inside the thin chassis. In other words, slim chassis with four wheels, you can walk, if not for the care of traditional patterns of conduct, for installation of driving and the like, Sequel is quite possible with a console as the handle can be manipulated. With this car, the designers can add any of the above form, without fear of space mechanical components of the compartment is occupied, the use of space will be the traditional car can not be compared. Battery vehicle hydrogen fuel because of some parties, and no internal combustion engine of the class of complex parts, so in theory it is difficult to be bad, now the cars can not be done. Battery vehicles to hydrogen fuel center of gravity is very low, before and after the 50/50 is the best proportion, which is now hard in pursuit of a super sports design car design and speed of motor response nature faster than the internal combustion engine, great torque, but also quiet and reliable, so that the future of fuel apple A1079 battery vehicles to hydrogen fuel, handling and driving pleasure are not worse than vehicle internal combustion engine. Possible in the near future, fuel battery vehicles to hydrogen fuel as the year the popularity of the emergence of integrated circuits, to cause a technological revolution in human society.

Japan Automobile Research Institute recently announced that Japan take the lead in the popularity of hybrid cars, lithium battery, making Japan leads the world in hybrid vehicle technology icing on the cake.

Li-ion battery that the current mainstream size nickel metal hydride Laptop battery and weight were compressed by about half, to improve the fuel efficiency of hybrid high importance, has become the preferred hybrid for the next generation. At present, around the production of lithium batteries, car manufacturers in the world and the engine, power companies have developed in the competition becomes increasingly fierce.

Japan, Hitachi Ltd. said it would invest 20 billion to 30 billion yen in 2015, the current production of lithium batteries for hybrid production capacity by approximately 70 times.

Allegedly, Hitachi will increase investment and expand its Tokai, Ibaraki Prefecture is located in the cause of the production capacity as soon as possible to achieve high production capacity lithium IBM FRU 92P1141 battery, the product will be mainly supplied to General S. U. Motors Corporation.

Earlier, Germany announced that from 2009 to launch a 360 million euro program to the vehicle battery development, almost all German cars and carry-owned energy giant to join. The German government said the implementation plan states that Germany will enter the era of electric vehicles.

At the same time, Daimler Motor Company and the energy company RWE has also announced that work together to build 500 recharging stations for electric cars. Alliance of the German automobile industry is expected by 2012, Germany will open a prelude to commercial production of Dell Inspiron 9400 battery electric vehicles.

The main advantage of electric vehicles is both energy saving, but also produces a wide range of effects on the environment. Studies have shown that the use of electric vehicles to cross a road mile, the need for gasoline cheaper than the cost of 80-90%, the carbon dioxide emitted by vehicles is 70%.

Japan’s Economy, Trade and Industry revealed that Japan will seek in 2010 lithium batteries for next-generation vehicles electric.

May 15 of this year, Toyota, Nissan Motor Co. and Matsushita Electric Corporation and other affiliated companies have signed an agreement to jointly develop a new generation of lithium batteries unified specification cars, and plans for mass production in 2 years. Toshiba decided to spend ¥ 50000000000 development of toshiba PA3399U-1BAS battery electric vehicles using lithium-ion batteries, which will be held within two years of power high performance semi-commercial production is planned for 2011 to a high-performance lithium-ion battery is suitable for different characteristics of the three categories, namely, in addition to the common type today, there will be separate from supporting the development of hybrid and electric vehicles, high power output of standard and high energy density lithium-type battery ion.

Popularity of electric vehicles is a key issue is the need for additional facilities of sufficient power. To this end, Tokyo Electric Power Co. has announced it will participate in the infrastructure to take the next year, lead, first built in the hp Pavilion dv4 battery metropolitan area of more than 200 charging stations, three years after the increase go over 1000. Major Japanese auto companies have responded positively involved in the study and engineering, with impatience “de-oil era” came to Japan as soon as possible. At present, the Tokyo Electric Power Company has successfully developed a charger large-scale fast every 10 minutes on a full charge, can travel the distance is 60 km, is the cooldown reduced significantly, and further accelerate the process of popularizing the use of electric vehicles in Japan, pace.

We learn that the establishment of a fee for each facility cost 400 million yen. Tokyo Electric Power Company provides parking supermarkets in Japan, convenience stores and post offices and other public places to achieve progressively charging facilities to apple A1185 battery facilitate people to shop, things to add power when you can leave the car.

According to Japan Automobile Research Institute predicted the popularity of hybrids according to the current projection, by 2020, hybrids within Japan should reach about 360 million. If the promotion of high-lithium performance are very popular hybrid is likely to contribute to reach 7.2 million.

Media critics said that although Japan may be a new generation of lithium batteries of the automobile to obtain ISO certification opportunities, and play a dominant role, and businesses will benefit enormously.

International industry that the market for electric vehicles over the next ten years to develop this type of scale, depend on whether the cost of lithium batteries can quickly get out, but one indisputable fact is that the sony VGP-BPS2 battery market potential be large enough to meet the needs of large-scale production.