LED street light standards are expected to become national standards for the first time in Xiamen

At present, the world's LED (light-emitting diode) road lighting technology is developing rapidly, and the global standards and test methods of products need to be researched and unified. The structural design and optical design of LED lamps have not yet embarked on a scientific track, and a series of problems that accompany them have become A bottleneck that hinders the development of LED road lighting. Yesterday, the "2009 Cross-Strait Optoelectronic Forum and Industrial Matchmaking Conference" supporting activities "LED Lighting Sub-forum--LED Road Lighting Technology and Standards" was held in Xiamen.

The topic of this conference is to discuss the development of LED road lighting technology and standards. The atmosphere was very warm, and the elites from the management, application, research and industry sectors of the two sides of the strait and Europe and the United States all expressed their views on the technology and standards of LED road lighting.

International Lighting Commission Franz? President Hans Berger first spoke, bringing the development trend of European road lighting standards to the participants, and sparked the thinking of China's LED road lighting standards. Li Liling, deputy head of the Institute of Environmental Engineering of Taiwan Institute of Technology, introduced Taiwan's experience in the development of LED streetlight standards and the technical standards referenced. In December 2008, Taiwan announced the clear definition of LED street lights, which was the first LED in the world. The street lighting standard area is experienced in LED street light standards.

Li Tienan, Yan Tongsheng, Ye Guanrong and Zhao Ying, the authoritative experts of the mainland LED, also expressed their views on the professional and technical aspects of LED street lamp standard construction. Mr. Ye Rongnan, a professor-level senior engineer from Xiamen Optoelectronics Industry Association, put forward the "LED Road Lighting Field Measurement Specification" at the meeting. After discussion by the participants, it was basically recognized and is expected to become a national standard.

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1.The rated voltage is high (the operating voltage of the unit is 3.7v or 3.2v), which is about equal to the series voltage of three nickel-cadmium or nickel-hydrogen charging batteries, so as to form the battery power supply group

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14.8V Li-ion Battery With SMBUS

Items                                  specification

Charge voltage  :                   16.8V

Nominal voltage :                   14.8V  (4S4P)

Initial impedance :                   200mΩ

Nominal capacity:                    10.4Ah

Minimum capacity :                  10.0Ah

Communication methods :        SMBUS data communication

Charge current : Standard Charging::0.5C₅A (5.20A

                                Rapid charge 1.0C₅A C(10.4A) Max

Standard Charging method:  5.20A(0.5C₅A) CC(constant current)charge to 16.8V,then CV(constant voltage 16.8V)charge till charge current decline to ≤104mA(≈0.01C₅A)

Charging time: Standard Charging:4.5hours(Ref.)

             Rapid charge:   2.5 hours(Ref.)

Max.discharge current: 10.4A(1.0C₅A)

Discharge cut-off voltage: 11.0V

Shelf life:  2 years

Cycle life (0.2C₅A/0.2C₅A) : 500 times,≧80%DOD; 500 times,≧80%DOD

Li-ion Battery With SMBUS

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