3003 Stamped Brazed Water Cooling Plate 400x300x8mm For 18650 Battery Module

This water cooling plate is a stamped and vacuum brazed 3003 aluminum cold plate sized for a 18650 battery module. Both plate halves are stamped from 4 mm sheet so the serpentine coolant channel is formed in the material itself, then the pair is brazed into a single sealed body. The compact 400 x 300 mm footprint suits module-level packs where the cooling plate is bonded under the cell holders.

• Stamped serpentine channel: channel geometry pressed into the plate, no welded tube inserts, no blockage risk at bends
• Vacuum brazed one-piece body: single brazing cycle produces a fully sealed plate with no secondary weld seam
• Light structural plate: 2.1 kg finished weight keeps module mass low while the brazed body stays stiff enough to support cell holders
• Optional surface treatment: anodizing for dielectric stand-off, chromate coating for corrosion resistance, powder coating for exposed faces
• Fully customizable: size, channel width, port thread and mounting hole pattern made to your drawing

The plate is formed in two stamped aluminum halves whose channel geometry is embossed directly into the sheet, then joined in a single vacuum brazing cycle. Compared with machined or extruded-tube cold plates, the stamped-and-brazed route gives a lighter part, a fully sealed one-piece body with no secondary welding seams, and a channel layout that can be redesigned without new heavy tooling. Vacuum brazing removes the flux residue and oxidation that shorten the life of a liquid circuit, and every plate is pressure tested and helium leak tested before packing.

Because the cooling plate sits inside a battery pack, an inverter housing or a charger enclosure, the surface has to do more than look clean. We offer Anodizing (clear / black / hard), powder coating, chromate conversion coating, nickel plating, electrophoresis (E-coat) and sand blasting. Anodizing and chromate conversion are the usual choices for dielectric stand-off against live busbars; powder coating is preferred where the plate is exposed to road spray; nickel plating is used where a glycol-water loop with an aggressive inhibitor package is specified.

This water cooling plate is fully customizable. Typical engineering changes include overall length and width, plate thickness, channel pattern and width, inlet and outlet position and thread, connector type (threaded boss, hose barb, quick coupling), mounting hole pattern, fin or pedestal geometry on the contact face, and the final surface finish. Send a 2D drawing or 3D model and our engineering team will confirm brazing feasibility, tooling cost and sample lead time.

Used for 18650 battery module cooling in low speed EVs, golf cart packs and small energy storage units, where a thin cold plate has to be bonded directly under cylindrical cell holders and keep cell-to-cell temperature difference within a few degrees.

Incoming aluminum sheet is verified for alloy and temper, stamped halves are checked against the drawing, and each brazed plate goes through dimensional inspection, internal pressure hold, helium leak detection and a flow and pressure-drop check. Finished parts are packed in export-grade plywood cases with shock-proof foam.

Trumony Aluminum Limited supplies aluminum materials and thermal management components for the new energy industry, covering aluminum sheet, plate, tube, cold plates and battery housings. In-house stamping, vacuum brazing, machining and surface finishing allow us to support customers from design and simulation through tooling, prototyping and serial delivery.

Quotations, drawings and samples for this stamped brazed water cooling plate are available on request. Contact us with your cooling load, flow rate and envelope so we can propose the right channel design and surface treatment.