Etp Grade Copper Washer 18/6

ETP GRADE COPPER WASHER 18/6

The ETP GRADE COPPER WASHER 18/6 is an ETP-grade copper contact washer developed for prismatic lithium battery terminal and busbar assemblies. Its high-conductivity copper construction supports a low-resistance contact interface, stable terminal clamping and efficient current transfer in EV, ESS, inverter and industrial battery modules.

ETP, or Electrolytic Tough Pitch copper, is widely used in electrical busbars and contacts because it combines high electrical conductivity with practical mechanical strength. In this 18/6 washer format, the component sits within the terminal stack to support the connection between the battery terminal, busbar and fastening hardware. The result is a compact conductive interface for prismatic LiFePO4 and lithium-ion battery packs where reliable cell-to-cell power transfer is important.

The washer contributes to the quality of a bolted battery connection by increasing the conductive contact area and helping distribute clamping force around the terminal interface. High-conductivity ETP copper supports efficient current flow and minimizes unnecessary resistance in the terminal stack. Its compact 18/6 market size makes it suitable for battery-pack production where repeatable terminal hardware is used across many cells.

In EV and energy-storage battery systems, short and rigid electrical paths are preferred because they reduce unnecessary conductor length and help maintain an organized module layout. The copper washer complements this approach by supporting the busbar-to-terminal connection point. Relevant buyer terminology includes ETP copper washer, prismatic cell copper washer, lithium battery terminal washer, battery busbar washer and EV battery contact washer.

The ETP Grade Copper Washer 18/6 is intended for prismatic-cell terminal stacks that use this washer size and a bolted busbar connection. It is suitable for battery manufacturing, module assembly, repair and service applications across LiFePO4 and lithium-ion systems. It works naturally with copper or aluminium busbar assemblies where the pack design uses a conductive copper washer at the terminal interface.

Applications

• Prismatic lithium-cell terminal stacks used with copper or aluminium battery busbars.

• EV battery modules requiring a conductive washer at the terminal connection point.

• Energy-storage and inverter battery packs built with bolted prismatic cells.

• Battery manufacturing lines assembling repeatable cell-to-busbar terminal stacks.

• Battery repair and rework where the terminal washer is replaced during busbar servicing.

Installation Guide

Position the component squarely on clean battery terminals or enclosure hardware and keep polarity clearly identified throughout assembly. Use the battery-cell or enclosure manufacturer's specified fastener stack and tightening torque so the connection remains mechanically stable without stressing the terminal. Keep conductive tools insulated around energized cells and prevent loose hardware from falling across adjacent terminals.

After assembly, inspect the connection for full seating, alignment and secure fastening. For busbars and terminals, a clean contact surface and firm mechanical joint support efficient current transfer. For enclosure fasteners, ensure the mounted hardware sits flush and does not interfere with insulation, wiring or nearby cells. A final visual inspection and controlled pack test help maintain consistent production quality.

For volume production, standardize the busbar or fastener part number in the battery BOM so the same geometry and hardware are used across every pack. This improves repeatability during assembly, service and future replacement work.

Why Choose ARB Accessories?

ARB Accessories supplies battery-pack interconnects, busbars, terminals, fasteners and related lithium battery hardware for Indian pack assemblers, OEMs, EV builders, solar and ESS manufacturers, service teams and custom battery projects. The ETP GRADE COPPER WASHER 18/6 gives buyers a ready-to-source component for battery-module production while allowing related BMS, cells, wires, terminals, connectors, insulation and enclosure hardware to be purchased from the same specialist supplier. This makes it practical for both prototype quantities and repeat battery-pack manufacturing requirements.