CNC Machined Aluminum 5052 Liquid Cooling Plate with 0.1mm Flatness for BESS Thermal Management

The cooling plate is the critical component that ensures battery safety in BESS cabinets. With tightly packed cells generating significant heat during charge and discharge cycles, liquid cooling provides the solution—but only when the plate maintains uniform contact with cell surfaces.

Our CNC milling process achieves flatness under 0.1mm across 600x400mm plates, eliminating hot spots that can lead to battery failure. Aluminum 5052 offers superior corrosion resistance for long-term glycol-water cooling applications, while our precision channel designs optimize thermal performance and flow distribution.

• Flatness Control: <0.1mm across full plate surface—CMM verified on every production lot
• Internal Channel Precision: Channel depth tolerance ±0.05mm for consistent coolant flow
• Material: 5052-H32 aluminum for superior corrosion resistance in glycol-water cooling loops
• Brazing-Ready: Machined surfaces prepared for vacuum brazing or friction stir welding
• Pressure Testing: Every plate leak-tested to 1.5x operating pressure before shipping
• Thermal Interface Optimization: Surface roughness Ra 0.8-1.6 for optimal thermal interface material application

• Commercial BESS Cooling: Liquid cooling plates for 50-500kWh cabinet battery systems with high C-rate cycling
• EV Battery Thermal Management: Cooling plates for electric vehicle battery packs—prismatic and pouch cell formats
• Data Center UPS: Thermal management plates for backup battery systems in server rooms
• Solar+Storage Hybrid: Cooling components for outdoor-rated battery enclosures in desert and tropical climates
• Industrial UPS Systems: High-discharge-rate cooling plates for factory and hospital backup power
• Telecom Battery Cabinets: Compact cooling plates for 48V telecom battery backup racks

• Leak Testing on Every Unit: Comprehensive testing prevents costly failures in battery cabinet installations
• Channel Machining Experience: Expertise in serpentine, parallel, pin-fin, and hybrid channel designs
• Brazing Partner Network: Coordination with qualified vacuum brazing vendors with full quality documentation
• Flatness Priority: Fixturing and machining processes designed around flatness as primary quality metric
• Thermal Cycling Validation: Test data from previous projects available to support qualification processes

1. Design Review: Analysis of channel pattern for machining access, wall thickness, and brazing clearance
2. Material Preparation: 5052-H32 plate stock verified for flatness, with pre-stress-relieving as needed
3. CNC Milling: 3-axis and 4-axis CNC with custom vacuum fixtures and fresh tooling
4. CMM Inspection: Comprehensive measurement of flatness, channel depth, and wall thickness
5. Surface Treatment: Nickel plating for corrosion protection or chromate conversion for brazing
6. Leak Testing & Packaging: Helium leak test or pressure decay test with custom protective packaging