Application in the field of batteries airgel
Battery industry is currently the most widely used is the lithium-ion battery, the appliance market from mobile phones, computers, ipad, to power in the field of new energy vehicles, cruise ships, and then thermal batteries, lithium-ion batteries used in figure weapons-free ubiquitous. However, the lithium ion battery due to its structural characteristics and the nature of the material led to its inevitable safety concerns. For example, the lithium ion battery separator interposed between the positive and negative strength and thermal stability is not ideal, easily lead to internal short circuit of the battery; higher temperatures may occur inside the battery results in a strong exothermic reaction and the temperature of the lithium ion battery internal pressure rise ; lithium ion battery electrolyte and a negative electrode materials are combustible materials.is understood the lowest thermal conductivity of solid materials, airgel insulation mats, insulation panels, thermal insulation properties of paper products up to 5 times as much as ordinary products together with excellent fire retardant, soft impact, noise reduction and other functions, in addition to achieve good promotion in industrial energy efficiency, insulation and other civilian areas, but with the development of the industry airgel, is also growing widely. 01, single cell airgel insulation protection Thermal runaway single cell is the source of the entire thermal runaway of the battery pack, because a single cell when thermal runaway is triggered, will produce heat surge, heat production is far less than the amount of heat, resulting in heat transfer to the surrounding batteries, then quickly lead to thermal runaway peripheral cell mass, form a security risk. Thus heat is an effective means of protection throughout the thermal runaway of the battery pack to eliminate safety hazards among batteries. Heat shield between the batteries is to increase the heat-insulating layer between the batteries, thermal runaway to block uncontrolled propagation from single cell to the surrounding batteries, to reduce damage to the battery pack and the damage accompanying. Electrically insulating material between the monomers of the core, can effectively delay or as a single cell block thermal runaway A thermal protective material to the mass of the entire battery system, must meet the following conditions:. A flame retardant ( achieve V0 rating) b aging resistance, chemical stability;. c does not generate toxic gases;. d good elasticity, low thermal conductivity, waterproof anti-vibration;.. e lowest thin lightweight insulating material often used in current , advantages and disadvantages of foam, fine glass wool, cotton, high silica, vacuum insulation panel, aerogels, and other insulating materials: the results showed that the monomer a thermal runaway, without the next heatProtection Blank Group B monomer quickly heated, thermal runaway, and the highest temperature provided between monomers using single B airgel insulation panel 110 is only deg.] C, the heat 6Ah successfully blocked monomers in 20mm pitch runaway propagation, and not out of control cell voltage substantially constant for the single cell of the battery pack explosion safety hazard thermal runaway play a very good protection. In addition, due to its excellent heat insulating airgel flame retardant properties, it can be further reduced to reduce the distance between the safety monomers. To save even more space and improve overall battery power, airgel company has developed a series of high-performance ultra-thin airgel insulation panels, insulation paper products to cater to the safety, high energy density requirements. 02, battery / overall protection box There occurs a lithium ion battery pack thermal runaway accident, battery power system related to thermal runaway of the lithium ion battery cells between the guard addition, the battery module also set between the passenger compartment and the battery case and heat shield, in order to improve the thermal resistance of the thermal runaway of the battery cell to the other heat transfer system, so as to achieve the purpose of hindering the spread of thermal runaway. In addition airgel mats having excellent thermal insulation, fire retardant properties, but also has a soft, performance can be arbitrarily cut, machined. The battery module may be used in various shapes, insulating shield between the passenger compartment and the battery case. Since the thermal battery having a large discharge current density, long storage life, is not susceptible to ambient temperature during operation characteristics, it is widely used in the field of weapons. From the JAS-39 light fighter life-saving emergency EAP-12188 uses battery power, GPS-9 battery on a remote global positioning artillery, AN on sonar buoys / SSQ-62 C batteries, to all kinds of missiles, you can see the shells the shadow of thermal batteries. The thermal battery operating temperature is generally between 450 \”C ~ 600\” C, the whole process depends on the initial discharge heat \”input\”, and the battery life is dependent on the discharge rate of the battery and the battery cooling freezing temperature. With the development of industry in China airgel, airgel applications in the form of battery in the field will be more diverse range of applications spread from the earliest military thermal battery to battery more civilian areas, such as new energy retardant protective insulation battery, lithium-ion batteries for electronic equipment, batteries and other aspects.