The 18th Research Institute of China Electronics Technology Group is a comprehensive research institute that has long been engaged in the development, research and production of physical and chemical power technology. The institute has more than 800 scientific and technological personnel from 47 majors. , has a group of well-known power supply technology experts at home and abroad. Since its establishment in 1958, the 18th Institute has successively carried out research on solar cells, lithium batteries, zinc-silver batteries, nickel hydrogen batteries, fuel cells, lead-acid batteries, thermoelectric generators and thermoelectric refrigeration components, and has developed and produced More than 30 series and more than 500 specifications and varieties of power products have been widely used in aerospace, communications, transportation and small electronic appliances and other fields.
In 2002, the 18th Institute began to carry out patent strategic research on "lithium-ion battery technology". Through retrieval and analysis of domestic and foreign lithium-ion batteries and related technical fields from different angles, and on the basis of studying the development status of related technical fields at home and abroad, we will find out the major patent applicants and core technology countries in lithium-ion battery technology, and conduct a comprehensive technical analysis. Excavating the scope of lithium-ion battery-related technologies that can be applied for patents in 18 institutes has pointed out the direction for the research of this technology.
From the launch of "Shenyi" in 1999 to the launch of "Shenqi", Eighteen institutes have served seven generations of spacecraft. From Shenzhou-1 to Shenzhou-6, 18 institutes have produced and provided solar arrays and 72 solar panels for six spacecrafts, with a 100% pass rate in one delivery. The solar cell array on the "companion star" is also produced by the 18th Institute, which provides electrical energy for the "companion star" load and battery pack, maximizing the conversion of solar energy into electrical energy.
The Eighteen Institutes give "wings" to the "Shenqi". The solar array installed on the "Shenzhou VII" will provide electric energy for the spacecraft load during the illumination period, and at the same time charge the battery pack. It is the most efficient battery among the spacecraft currently used in orbit in my country. After the spacecraft takes off, the battery arrays on the north and south wings will expand to both sides, like two huge "wings", responsible for power supply support for the entire spacecraft. At the same time, these two "wings" will also withstand space radiation, thermal cycles, ultraviolet radiation from outer space, noise, impact, etc.
After entering the predetermined orbit, "Shenzhou VII" will launch a "Shenzhou VII" satellite for the first time. companion". The "companion star" is equipped with a stereo camera similar to that of "Chang'e 1". After ejection, it will take the first three-dimensional three-dimensional exterior photos of China's spacecraft flying in orbit, showing the unique scenery of "Shenzhou VII" operating at high speed in space.
In addition, the "Shenzhou VII" solar cell sail wings are "wearing" strict "protective armor" - a radiation-resistant glass cover on the surface of the solar cell, which is only equivalent to the diameter of a human hair. , which can effectively block high-energy particles and ultraviolet rays in space, and protect the solar cell sails on both sides of the spacecraft hull. It has been used in the "Shenzhou 5" and "Shenzhou 6" before.