中文摘要：

为了解决现有的某型号模组箱体不能适应电池膨胀的问题，需要设计一种恒压紧力模组箱体，使电池在膨胀过程中始终受到一理想的恒定压紧力。通过对压紧机构工作特性的分析及常见变刚度弹簧和机构的研究，在模组箱体内部设计了一种结构紧凑的恒压紧力机构，并对其进行理论分析，得到其压紧力和位移的关系表达式。基于ABAQUS接触分析，计算了电池组的总膨胀量及恒压紧力机构的性能曲线。结果表明，恒压紧力模组箱体能为电池提供理想的压紧力。

英文摘要：

In order to solve the problem of a existing type module box that can＇t adapt to the expansion of the batteries, designing a kind of constant clamping force module box is needed, which to keep the battery by an ideal constant clamping force in the process of expansion. By analysing the performance characteristics of the compaction mechanism, as well as studying the common variable-stiffness springs and mechanisms, designed a constant clamping force mechanism inside the module box, by analyzing it＇s theories, and obtained the clamping force and displacement relationship expression. Calculated the total amount of expanaion of the batteries and the performance curve of the constant clamping force mechanism based on ABAQUS contact analysis. Results show that, the constant clamping force module can provide the battery with the ideal clamping force.