Reliability assessment of aluminum-magnesium alloy bolts in battery pack structures for new energy vehicles
铝镁合金螺栓在新能源汽车电池包结构中的可靠性评估

摘要

新能源汽车电池包作为核心部件，其结构稳定性和安全性对整车性能至关重要。铝镁合金螺栓凭借低密度、高比强度和良好耐腐蚀性，在电池系统连接中逐步替代传统钢制螺栓，实现减重与增强可靠性的双重目标。通过优化连接方式、改进制造工艺与装配控制，该类螺栓在复杂工况下的服役表现不断提升。结合仿真分析与实验验证，其在实际应用中的力学性能和长期稳定性得到有效保障。相关技术进展推动了新能源汽车安全性能的整体提升，为后续轻量化发展提供了可行路径。

Abstract

As a core component of new energy vehicles, the battery pack plays a critical role in determining the structural stability and safety of the entire vehicle. Aluminum-magnesium alloy bolts, with their low density, high specific strength, and excellent corrosion resistance, have gradually replaced traditional steel bolts in battery system connections, achieving both weight reduction and enhanced reliability. By optimizing connection methods, improving manufacturing processes, and refining assembly control, the service performance of these bolts under complex operating conditions continues to improve. Combined with simulation analysis and experimental verification, their mechanical properties and long-term stability in practical applications have been effectively ensured. These technological advancements have contributed to an overall improvement in the safety performance of new energy vehicles, providing a feasible path for future lightweight development.