Analyzing the development of the aviation lithium ion battery

Source: 2020 - 04 - 14 parts hits: air time, the development of lithium ion battery performance and heat transfer ability of environment has more stringent requirements. In addition, according to the requirement of the aircraft to the total load, the weight of the battery has been issues of concern in the design of aircraft power supply system. A method of weight significantly reduced the energy storage system is to use lithium-ion battery technology. The U. S. military has small unmanned drones used in Iraq and Afghanistan, and by the American aerospace company environment ( 美国航空环境公司。 ) The development of 'longan ( 龙的眼睛) Is best known for its automatic, recyclable and hand-launched function, and its power lithium ion battery. In 2011, the company developed a new generation of hummingbirds reconnaissance aircraft, only 16 cm long, can fly at 11 miles per hour, can bear the wind of 5 miles per hour, the weight is less than its source is the weight of the section of AA batteries and lithium ion batteries. In 2009, Europe's airbus unveiled for the first time provided by Saft lithium ion battery system, as the start of the airbus A350 and standby power supply. Boeing one of the most advanced A787 main battery and auxiliary power unit ( APU) Using lithium ion batteries. Since the 1980 s, with the support of the government, Japanese companies have investment in lithium ion battery research. Is well-known companies such as mitsubishi, soup shallow lithium-ion suppliers. Foreign enterprise attaches great importance to the development and protection of market, research in the field of aviation lithium ion battery in its infancy. Aircraft using the lithium ion battery can than about 100 ~ 150 Wh/kg, just to meet the minimum requirements of aircraft electric power system. In order to make the battery power system with the same level of internal combustion engine power system, need can improve battery than 20 times. Solid electrolyte and nanometer electrode technology is expected to make the lithium ion battery than can respectively increased by more than 2 times and 5 times, but the technology is still in the stage of basic research. Large capacity, high power lithium ion battery has a very broad application prospects in the field of aviation, but safety problem has become the bottleneck of restricting its development, need to be addressed. On January 7, 2013, Japan airlines ( jal) After a Boeing 787 aircraft fuselage got help is not only the battery and the external shell was badly damaged, but the generated hot gas leaked electrolyte and the damaged aircraft structure is half a metre ( Figure 4) 。 Only nine days later, another all Nippon airways Boeing 787 took off and made an emergency landing due to battery problems like the reached cruising altitude. 129 passengers and eight crew members escaped. , a study has found the front of the aircraft cockpit below main batteries overheating of electronic cubicle burn out, cause serious damage to the fuselage. On April 25, 2013, the federal aviation administration ( FAA) Formally approved the Boeing company. Boeing's 787 aircraft modification plan of the battery. Two days later, restored the flight of the Boeing 787. On Boeing 787 lithium battery, he xm, high-power battery safety are analyzed, and the system of storage battery is antioxidant) ( Anode materials and fuel ( Anode materials and electrolyte) Together, sealed in a closed container to store and release energy, accident showed that the existing external short circuit, charging and discharging safety protection measures and technical unable to cope with the battery internal short circuit. Under the current technical level, thermal runaway when it happens, the most feasible approach is to make the whole battery module rapidly cooling, prevent the battery from the module transfer between the thermal runaway.