Mechanical Packaging and Material Selection 137 Table 2:
National Electrical Manufacturers Association enclosure rating system Design Guidelines and Best Practices There is no standard size lithium-ion battery pack The term battery module refers to the assembly of lithium-ion cells into a single mechanical and electrical unit The module is the basic building block for all system designs Battery enclosures may be made of a combination of stamped steel or aluminum, cast aluminum, fiber glass, composite, or plastics Plastics are commonly used in battery designs in the ICBs, modules, thermal systems, and in the module and pack mechanical structure The two types of sealing standards that must be assessed are IP and NEMA Enclosure Rating Protection against 1 2 4 4X 5 6 6P 12 12K 13 Access to hazardous X X X X X X X X X X components Ingress of solid foreign X X X X X X X X X X objects (falling dirt) Ingress of water X X X X X X X X X (dripping and light splashing) Ingress of solid foreign X X X X X X X objects (dust, lint, fibers) Ingress of water (hose X X X X down and splashing) Oil and coolant seepage X X X Oil and coolant spray X and splashing Corrosive agents X X Ingress of water X X (occasional temporary submersion) Ingress of water X (occasional prolonged submersion)