Transport packaging requirements for power lithium batteries

Power lithium-ion batteries are very different from batteries in portable mobile devices. The battery pack is generally composed of dozens or even thousands of batteries connected in series or in parallel. In addition to the large capacity (much greater than 100Wh), the volume and weight of the powerbatterypack are also much larger, which has different requirements from the pack of mobile devices. According to the United Nations model regulations for the transportation of dangerous goods, lithium batteries should be packed in dangerous goods packaging that meets the packaging performance of the United Nations Packing Group II (PGII). This covers all modes of transportation, including air, water, roads and railways. The weight limit for air transportation is 35 kg. The materials and types of power lithium-ion battery assembly are: power lithium-ion batteries mostly use fiberboard boxes, plywood boxes, recycled wooden boxes, log boxes, a small part of steel boxes, aluminum boxes and plastic boxes. The packaging should be a bulk container that meets the general requirements of IMDG 4.1.1 and 4.1.3 for the performance of Type II packaging. General power lithium-ion batteries or battery packs, such as electric bicycles, motorcycles, etc., use medium-sized packaging containers: steel 1A2, 3A2, 4A, aluminum 1B2, 3B2, 4B, plywood 1D, 4D, hard fiberboard 1G, 4G, plastic 1H2 , 3H2, 4H2, other metals 1N2, 4N, wood 4C1, 4C2, recycled wood 4F; Regarding large power lithium-ion battery packs (weight greater than 400 kg or greater than 450L), such as the size of the car chassis, use bulk packaging: steel 50A, aluminum 50B, other metal 50N, hard plastic 50H, natural wood 50C, plywood 50D, reclaimed wood 50F, hard fiberboard 50G. Regarding the thermal runaway of lithium batteries, the important domestic solution is to protect it from the outside and improve it from the inside. External protection is important to upgrade and improvement of the system, and internal improvement is important to the improvement of the battery itself. (1) Promote cooling methods. The thermal management system is responsible for controlling the temperature to ensure that the battery is always at a reasonable working temperature. The thermal management system is usually controlled by the vehicle controller. When the battery temperature is abnormal, the air conditioning system can be cooled or heated in time to ensure the safety and service life of the battery. The battery's heat dissipation methods are divided into four types according to the heat conduction method and the medium: air cooling (air cooling), liquid cooling (water cooling), phase change material (solid), and composite cooling (water cooling + solid). (2) Improvement of internal materials and structure The internal improvement is to transform the internal material structure of the battery to make the battery have better heat resistance and heat dissipation performance. As far as the current research focus is concerned, the development of solid electrolytes; the positive and negative electrodes are reconstructed. The use of safer diaphragm materials is one of the important ways to improve the thermal performance of the battery from the inside. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Analysis of the hazards of waste batteries and methods for recycling waste batteries