For a long time, the role of battery box in PACK design has been simply defined as "structural parts"-its task is to protect cell, withstand vibration and impact, and provide Installation Interfaces. However, in today's intense competition in energy density, the design logic of battery boxes is undergoing fundamental changes.

A review article published by University of Science and Technology Beijing in Journal of Engineering Science pointed out that, the innovation of power battery box has changed from simple "lightweight" to system innovation characterized by "material-structure-function integration". Research reveals that in the past ten years, battery box materials have developed from single metal materials to high-strength steel, aluminum alloy, carbon fiber reinforced composite materials (FRP), sheet molding plastics (SMC), diversified pattern of metal layered composite materials and emerging magnesium alloy and multi-material mixed system coexist.

What is the practical significance of this transformation? Taking aluminum foam sandwich (AFS) integrated liquid cold plate as an example, this structure integrates the cooling function directly into the bottom plate, and realizes bottom protection and heat pipe at the same time without increasing the additional structural height.Three functions of management and lightweight. The research results show that the scheme shows effective temperature regulation and good structural response in multi-axis impact, mechanical vibration and thermal management tests, which is safe, lightweight, efficient battery pack design provides a feasible technical route.

Bionic structure optimization and intelligent material integration are also breaking through the performance boundary of traditional material systems. For example, a new compact battery heat exchange system coupled with bionic Fishbone liquid cooling and composite phase change materials enhances Paraffin heat transfer and prevents paraffin leakage through aluminum foam framework, and removes the heat absorbed by paraffin by using bionic Fishbone liquid cooling channel, the balance between structural compactness and heat dissipation efficiency is realized..

Dongguan Juneng New Energy Technology Co., Ltd. He has more than 10 years of engineering experience in battery pack structure design, covering industrial equipment, AGV cargo van, medical devices and other fields. The company's flexible manufacturing system can adapt to the switching of multiple types of household energy storage batteries from 2.7kg T-bar scooter battery to 132kg. For equipment manufacturers, when choosing PACK Partners, a question worthy of attention is: what level has your battery box solution reached in terms of structure, heat dissipation and weight? Suppliers who can give specific data are usually more worthy of in-depth investigation than those who only talk about "lightweight design.