膨脹力測試概述About Pressure Analysis

電芯實際使用時是束縛在模組內，充放電過程中厚度的變化引起膨脹力會直接影響電芯、模組及電池包的電性能、安全及可靠性等表現。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. 為了研究清楚上述變化與關聯，對于電芯在實際工作時結構與狀態的模擬與仿真（即電芯原位膨脹厚度、原位膨脹壓力特征參數）非常重要，其具體方式如下圖。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.

膨脹力測試概述About Pressure Analysis

材料不可逆損耗與劣化引起的極片/電芯逐漸變厚、析鋰等(如下圖)。對于膨脹及析鋰評價的傳統方法非原位、破壞性、成本高、效率低而且偏差大，已不能滿足當前研究開發需求. 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.

實現扣電、單層疊片、軟包與方殼電芯等原位膨脹力與厚度測量；Realize in-situ pressure and thickness test for Coin, single stack, pouch and prismatic cell;

為電芯材料開發、結構設計、工藝優化及相關機理研究提供支撐；Provide help for materials development, structural design, process optimization and related mechanism research;

為模組、電池包設計提供可靠的結構參數。 Provide reliable mechanical parameters for module, pack design.

解決方案與產品 Solution and Product

應用領域與方向Application Fields

鋰電池、超級電容器等二次電池相關領域的生產制造企業、大學及科研院所科研過程；

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

一體化恒間距膨脹力：New AIO Solution

普通墊片恒間隙膨脹力

薄膜傳感器原理

薄膜感測片由上下兩層柔性可彎折的薄膜材料組成，上層為壓感功能薄膜，下層為電極薄膜感測片受壓時，上下兩層薄膜發生接觸，其接觸面積、接觸形變會隨著壓力大小變化而變化，從而使電極端產生隨壓力變化而產生的電阻抗信號量的變化。

感測片上每一個壓力點的原始壓力特性呈現為與受壓壓力線性變化的一條壓力曲線。感測片的出廠測試、標定過程中，會記錄每一個點的原始壓力曲線，形成每一感測片專有的MAP標定文件。

消 費 類 電 池 化 成 壓 合 與 壓 敏 紙 對 比，可以看出電芯循環過程中出現受力不均勻情況。同時，化成設備的夾具之間夾板力出現不均勻； 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.

審核編輯黃宇