Liquid Cooling Plate Design Specifications for EV Batteries

This document provides design specifications for liquid cooling plates used in electric vehicle battery systems, with water-ethylene glycol as the cooling medium. It covers scope, functions, normative references, terms, design input parameters, selection criteria, and detailed design guidelines. Key functions include high heat dissipation, reliability against leakage under vibration, precise temperature control to minimize module temperature difference, and lightweight construction. The document classifies liquid cooling plates by welding process: friction stir welding (high performance, reliable, but costly and heavy), brazing (flexible, thin structures), and solderless brazing (minimized thickness and weight). Design inputs include battery module dimensions, type (square, round, soft pack), temperature difference requirement (≤5°C), and weight reduction goals. Material selection focuses on aluminum alloys (e.g., AL6061). The specification guides flow channel and structural design, layout, installation, technical requirements, and test methods, referencing standards for aluminum profiles, friction stir welding, brazed joints, and thermal conductivity measurement. Appendices provide selection tables for quick-plug connectors, flat tubes, and bump structure dimensions.