Abstract: The use of cell to pack (CTP) technology can effectively improve the battery energy density and extend the service life, thereby further improving the overall performance of the power battery. It is mainly uses structural adhesive or thermal conductive structural adhesive to complete the bonding and fixing between the battery group and the box to achieve long-term reliability of the battery pack. In this paper, a square lithium-iron battery is taken as the model, and the power spectrum density (PSD) of the battery vibration test in standard Safety Requirements for Power Batteries Used for Electric Vehicles (GB 38031－2020) is taken as the calculation boundary, and the modal superposition method is used to calculate whether the strength and stiffness of the battery shell structure meet the requirements. The degumming area of the CTP battery pack is disassembled by red ink method and compared with the simulation results. The results show that the agreement rate of the degumming area between the simulation and the test is more than 90%, which indicates the reliability and validity of the results.

Key words: vibration condition; CTP battery pack; degumming area; benchmarking analysis

摘要： 采用无模组（CTP）技术可以有效提升电池能量密度和延长使用寿命，从而进一步提 升动力电池整体性能，其主要是利用结构胶或导热结构胶来完成电芯组与箱体之间的粘接固 定，以实现电池包的长期可靠性。文章以某方形铁锂电池为模型，以《电动汽车用动力蓄电 池安全要求》（GB 38031－2020）标准中对电池进行振动测试的载荷功率谱密度（PSD）为计 算边界，采用模态叠加法计算电池壳体结构的强度及刚度是否满足要求，采用红墨水法对 CTP 电池包进行拆解，统计脱胶面积，并与仿真结果进行对标。结果显示，仿真与试验的脱胶面 积一致率均在 90%以上，表明了结果的可靠性与有效性。

关键词: 振动工况；CTP 电池包；脱胶面积；对标分析