Metal Box 74V 30Ah (250X160x220 mm) for 21700 140 Cell

Metal Box 74V 30Ah (250X160x220 mm) for 21700 140 Cell

The Metal Box 74V 30Ah (250X160x220 mm) for 21700 140 Cell is a metal battery enclosure listed for a 74V 30Ah lithium-ion battery-pack application using 21700-format cylindrical cells. It provides a housing for a battery assembly identified for 140 cells, giving pack manufacturers a defined size for enclosure planning and mechanical integration. The stated dimensions are 250 × 160 × 220 mm. The product is an enclosure component, not a complete battery pack; cells, BMS, busbars, insulation, wiring and protection devices are separate components unless supplied separately.

A battery enclosure forms the mechanical boundary around a cell assembly and keeps the pack organised during handling and installation. For a 21700-cell design, the enclosure must be considered with the selected cell dimensions, holders, interconnection method and battery-management components. The 140-cell designation identifies the intended cell quantity, while 74V and 30Ah identify the stated pack application. These details guide selection but do not replace checks of electrical configuration and usable internal space.

The 21700 format is used in cylindrical lithium-ion battery assemblies for electric mobility and energy storage. The final layout depends on the cell model, terminal orientation, insulation requirements and selected series-parallel configuration. A 140-cell count alone does not establish the electrical arrangement. The 74V 30Ah designation must be matched to the selected cells and battery-system design; it does not independently establish cell chemistry, series count or discharge capability.

The dimensions of 250 × 160 × 220 mm are relevant when checking installation space in a vehicle or equipment chassis. Establish whether these measurements are external dimensions and compare them with usable internal space before finalising the cell layout. Allowance is also required for insulation, cell supports, busbars, BMS placement, cable routing and service access. Manufacturing tolerances and internal construction should be included in the mechanical design. A dimension match alone does not establish that a complete 140-cell assembly will fit.

Metal construction provides a physical enclosure, but the product name does not specify metal grade, sheet thickness, coating, corrosion resistance, lid arrangement, sealing method or mounting details. No water or dust protection rating, impact rating, thermal rating or vehicle-specific approval is stated. Assess the completed system against vibration, moisture, temperature, mounting loads and inspection access. Electrical insulation between live battery components and the conductive enclosure is essential to prevent unintended contact or short circuits.

Applications

• 21700 cylindrical-cell battery-pack assembly using the stated 140-cell product designation.

• 74V-class lithium-ion battery projects requiring a dedicated metal enclosure.

• Electric two-wheeler battery development where enclosure dimensions match the vehicle packaging.

• Electric three-wheeler battery projects subject to chassis, mounting and electrical compatibility.

• Custom battery-pack manufacturing and prototype builds using 21700-format cells.

• Battery integration projects requiring a defined housing for a separately engineered cell assembly.

Installation Guide

Before assembly, compare the selected 21700 cell model and layout with the enclosure's usable internal dimensions. Confirm cell quantity, terminal orientation, holder arrangement and clearances for insulation and interconnections. Check the enclosure against available vehicle or equipment space, and plan positions for the BMS, protection devices, wiring and external connections. Do not assume that 140 cells confirms a particular series-parallel arrangement or that external dimensions represent usable internal space.

During assembly, use suitable cell supports and electrical insulation to prevent movement and unintended contact with the metal housing. Arrange busbars, wiring and protection components according to the battery design, protecting conductors from sharp edges and mechanical stress. Provide secure retention without applying pressure that could damage cells. Battery construction and electrical connections should be completed by personnel qualified to work with the selected cell chemistry and pack voltage.

Before commissioning, inspect the enclosure, cell retention, insulation, cable routing and electrical connections. Confirm polarity, pack voltage and protection-system operation using procedures appropriate to the completed design. Check secure mounting and consider vibration, moisture, heat and service access. Record the final cell arrangement and component details so later maintenance or design changes can be assessed against the original configuration.

Why Choose ARB Accessories?

ARB Accessories supplies components for lithium battery and electric mobility manufacturing, including battery cells, BMS products, chargers, enclosures and battery-pack assembly accessories. This metal box is listed for a 74V 30Ah application using 21700-format cells, with a 140-cell designation and dimensions of 250 × 160 × 220 mm. These details help assemblers assess enclosure size and intended application. Match the enclosure with the actual cell model, internal layout, insulation, protection components and installation environment before production.