Hitachi developed the world’s smallest sensor network terminal
Hitachi developed the world’s smallest sensor network terminal
Hitachi and YRP Ubiquitous Networking Institute November 24, 2004 announced the development of the world’s smallest terminal of the sensor network. For the installation of the battery terminal active wireless terminals can be equipped with temperature, light, infrared, accelerometers and other sensors. The idea applies to the building and the family of wireless sensors and security management.
Hitachi YRP Ubiquitous Network and Institute for the development of the “world’s smallest” active sensor network end-use lithium-ion rechargeable batteries.
The development is to use a frequency of 300MHz the weak wireless signal to communicate with the base station of the wireless terminal. Communication distance of 10 meters. Equipped with 8-bit microcontrollers, the use of the company’s own wireless standards and communication protocols. The use of power for the lithium-ion rechargeable battery or Honda battery. Models including the smallest terminal size lithium-ion rechargeable battery included for the 2.3cm × 2.0cm × 1.5cm, volume 6.9cm3. As the “original 10cm3 also about the smallest” (Hitachi), so that the terminal “is the world’s smallest” (Hitachi).
In addition to size, the communication of “intermittent emission” (Hitachi), battery life is also able to significantly extend. “In the (back-up port of the wireless sensor network) ZigBee in, issued by the base station to the called terminal identification (Beacon) control signal terminal for receiving the signal and the cost of electricity. The development of the terminal through the terminal to the base station communication signal only, so do not need to wait for the signal “(Hitachi).
Standby time for the specific use of voltage +3.7 V, the market capacity of 150mAh Li-ion rechargeable battery, the “wireless communication will be set to launch the first five minutes, then no need to replace batteries or recharge to use 1 and a half years” (Hitachi Ltd.). On the other hand, ZigBee, despite frequent claims to “2 3 alkaline batteries can be used 1 year to 2 years.” However, on the 3rd of each of the capacity of alkaline batteries 1000mAh ~ 2000mAh, therefore, then, after conversion, the development of the terminal of its battery life can be extended more than 10 times.
Each base station to access the distribution terminal ID and ZigBee are the same as 16-bit (65,536), but “if the base station taking into account the processing power and wireless bandwidth, then the base station for each access terminal 1000 is more about feasible “(Hitachi). In addition, ZigBee is different from the development of the wireless terminal does not communicate with each other between the terminal functions. But it also can be “micro-controller by modifying the software to be supported.”
TV mobile phones in the near future will be very popular
ABI Research in the United States November 30 local time, released the results of a survey, “to receive television programs would be universal access to mobile phones sooner or later.”
ABI Research director of the Semiconductor Research sector analyst Alan Varghese said that the beginning of mobile phone operators of television programs do not receive a positive performance. “In addition to the average revenue per user (ARPU) of the contribution of small, there may affect the duration of the battery, claiming the proceeds of a good voice and data communications users.” (Alan Varghese)
But recently some of the mobile phone operators to start mobile phone network in a short period of time and the broadcasting of television programs of interest, such as interactive television, they have noted the potential of television broadcasting. In addition, mobile phone suppliers and chip makers are also developing products used to receive television.
NEC, Toshiba, Nokia of Finland and South Korea’s Samsung has launched a TV tuner built-in phone. Texas Instruments in the United States announced in October are being developed all the features to deal with television signals in a single chip LSI.
“Watching television, when compared with the small screen TV of course, an ordinary mobile phone is the preferred equipment. But in the near future, mobile phones will be widely used in railway stations, airports or restaurants, such as short-term leisure time watching television.”
Research Institute production of new electrolyte lithium batteries will be more secure
Institute of Advanced Industrial Science and Technology in Japan developed a lithium-ion rechargeable battery for the flame-retardant electrolyte. Not volatile as a result, even if the temperature of +300 ℃ will not be close to the fire and decomposition, but also not in the ordinary lithium-ion rechargeable battery voltage of the chemical reaction. Will be applied to lithium metal anode for lithium-ion rechargeable batteries can greatly enhance the safety of use.
The development of electrolyte for maintaining the liquid state under normal temperature and the organic salt “ionic liquids.” Specific components for the four cyclic amine - amine salt PP13-TFSI (N-methyl-N-proplylpiperidiniumbis (trifluoromethanesulfonyl) imide). Not only has the non-volatile and fire retardant, and will not precipitate a lithium metal anode for lithium-ion rechargeable battery, when often the dendritic crystallization (dendrite). The original organic solvents as a result of repeatedly charging generated power and dendritic crystal would result in the compartment between the electrode punctured causing a short circuit. The development of ionic liquids will not be such a dendritic crystal precipitation, but relatively smooth deposition.
The development of the use of electrolytes to lithium metal as negative electrode, lithium cobalt (LiCoO2) for the positive electrode of the button battery charge and discharge more than 97% efficiency, the effect was very good. In addition, a nickel electrode plate for easy battery trial units (according to charge type unit) charge-discharge efficiency was also achieved in the test more than 97%, with the original organic electrolyte maintained essentially at the same level. Institute of Advanced Industrial Science and Technology that, in addition to lithium metal used in electrodes for lithium-ion rechargeable battery, this electrolyte can also be used to improve the existing lithium-ion rechargeable battery security. As a result of new low electrolyte conductivity, so the issue is how the future through mixture with other electrolytes, such as to be improved.
The results as a New Energy and Industrial Technology Development Organization (NEDO Technology Development Organization) project commissioned by the “fuel cell vehicles, such as lithium-ion battery technology development - elements of high-performance lithium battery technology development (2002 ~ 2006)” and to conduct research.
Henan to use its advantages in resources to create rare-earth nickel hydrogen battery industrial base
Held a few days ago from Zhengzhou meeting was informed that the National Office of Rare Earth, Rare Earth, Henan Province is using its resources to focus on building advantages of Ni-MH battery industrial base.
It is understood that the use of rare earth resources in recent years, Henan Province, in the manufacture of permanent magnet materials, energy efficient fluorescent materials to make significant progress. Several enterprises in Henan Province, according to the characteristics of rare earth resources, effective use of reasonable and moderate doping, which can effectively improve the battery performance of anode materials are being promoted Ni-MH battery industry in Henan province’s rapid development. Henan Development and Reform Commission said the officers concerned, to give full play to the Henan Xinxiang battery industrial base better than species-wide, supporting the full advantages of nickel-hydrogen batteries to accelerate the construction of industrial projects, and strive to Henan Province to develop into the base Ni-MH battery industry.
Was also informed that the rare earth fertilizer agricultural enterprises of Henan Province and crops upgrading played an important role in income. From 2002 to the present, Henan Province, has more than 10 small rare earth fertilizer to achieve the production of agricultural products and fertilizer transformation. It was also introduced, rare earth resources, the role of economic development more and more obvious, the current countries as the main raw materials of rare earth permanent magnet motor development projects a very significant energy savings, and some energy-saving rate of 30 percent, that will promote electric industry restructuring, also saves energy.
National Semiconductor introduced delayed-type step-down controller
National Semiconductor Corporation (National Semiconductor Corporation) (NYSE: NSM) introduced a system to support efficient field-effect transistor P hysteresis (P-FET) buck controller. The model for the LM3475 controller chip using a very small SOT23-5 package, which is characterized by fine with system design can be simple hysteresis control circuit. System design engineers will be using this chip for the system without external compensation, to ensure that a wide range of components can be a stable operating system can be made extremely fast transient response. Hysteresis control circuit even in a very small load can also support high-efficiency operation. P of the advantages of field-effect transistor structure is required to reduce the number of components, porosity will be increased to 100%, as well as the operation had only a very low pressure drop.
The controller chip for a variety of typical applications, including TFT monitors, car personal computer systems, vehicle security navigation systems, notebook computer back-up power supply to battery-powered portable electronic products and power distribution system.
Battery technology | admin | 01 July 2009 |
