原位膨胀测试解决方案

膨胀力测试概述About Pressure Analysis

电芯实际使用时是束缚在模组内，充放电过程中厚度的变化引起膨胀力会直接影响电芯、模组及电池包的电性能、安全及可靠性等表现。During charge and discharge, the cell’s thickness change lead to the pressure variation, directly influence the performance of electrochemical properties, safety and reliability of cell, module and battery. 为了研究清楚上述变化与关联，对于电芯在实际工作时结构与状态的模拟与仿真（即电芯原位膨胀厚度、原位膨胀压力特征参数）非常重要，其具体方式如下图。In order to study the change and correlation clearly, the modeling and simulation for the actual work structure and status of batteries (in-situ thickness, in-situ pressure characteristic parameter) are very important. as is shown in the following diagram.

膨胀力测试概述About Pressure Analysis

材料不可逆损耗与劣化引起的极片/电芯逐渐变厚、析锂等(如下图)。对于膨胀及析锂评价的传统方法非原位、破坏性、成本高、效率低而且偏差大，已不能满足当前研究开发需求. Irreversible loss and degradation lead to electrode /Cell gradually thickness increase, ALP, etc. Ex-situ and destructive traditional methods can't meet current requirement due to its high cost, low efficiency, large deviation.

实现扣电、单层叠片、软包与方壳电芯等原位膨胀力与厚度测量；Realize in-situ pressure and thickness test for Coin, single stack, pouch and prismatic cell;

为电芯材料开发、结构设计、工艺优化及相关机理研究提供支撑；Provide help for materials development, structural design, process optimization and related mechanism research;

为模组、电池包设计提供可靠的结构参数。 Provide reliable mechanical parameters for module, pack design.

解决方案与产品 Solution and Product

应用领域与方向Application Fields

锂电池、超级电容器等二次电池相关领域的生产制造企业、大学及科研院所科研过程；

Manufacturing enterprises, universities and scientific research institutes of lithium battery, supercapacitor and other secondary battery related fields;

一体化恒间距膨胀力：New AIO Solution

普通垫片恒间隙膨胀力

薄膜传感器原理

薄膜感测片由上下两层柔性可弯折的薄膜材料组成，上层为压感功能薄膜，下层为电极薄膜感测片受压时，上下两层薄膜发生接触，其接触面积、接触形变会随着压力大小变化而变化，从而使电极端产生随压力变化而产生的电阻抗信号量的变化。

感测片上每一个压力点的原始压力特性呈现为与受压压力线性变化的一条压力曲线。感测片的出厂测试、标定过程中，会记录每一个点的原始压力曲线，形成每一感测片专有的MAP标定文件。

消 费 类 电 池 化 成 压 合 与 压 敏 纸 对 比，可以看出电芯循环过程中出现受力不均匀情况。同时，化成设备的夹具之间夹板力出现不均匀； It can be seen that the pressure is not uniform in the process. At the same time, the splint pressure between the jigs of the formation equipment is uneven.

审核编辑黄宇