As an important accessory of new energy vehicles, lithium batteries must be strictly controlled at every step of research and production, and their cross-section needs to be analyzed after forming. Today we will talk about the inlaying and polishing process, as follows:


1、 Inlay


Required equipment: Air-Out vacuum permeameter

The Air-Out vacuum system consists of a true cavity and a vacuum pump. The Air-Out vacuum system is designed specifically for samples embedded with pores and cracks, and also has sample storage function. Vacuum pumping can remove air from the sample and embedded resin, allowing the embedded resin to penetrate into the pores of the sample, supporting the structure of brittle and fragile samples, improving edge retention effect, and facilitating smooth subsequent grinding and polishing.


Unique feature: The coating, plating layer, and pores that have undergone edge protection can fully reproduce their microstructure


The method of using cold embedding requires the use of QMAXIS EpoCure epoxy resin for embedding. The curing time is 6 hours, which has good flowability and low shrinkage. If you need better embedding effect, you can choose QMAXIS EpoFlow. The curing time is 9 hours, which has better flowability, lower shrinkage, and lower exothermic temperature.

At the same time, reusable plastic injection cups, Release agent release agents, Graded mixing cups mixed with wax paper cups, Wooden spatulas mixing rods, and other inlay auxiliary consumables such as SamplCup will also be used for inlay.


2、 Polishing


Required equipment: METPOL-A semi-automatic metallographic polishing machine

METPOL– A is a fully automatic metallographic grinding and polishing machine with manual mode for more flexible applications. The grinding disc size is 10 inches and 12 inches, and the grinding disc speed is 600 rpm/min (manual) and 700 rpm/min (automatic). It can preset/store 5 groups * 12 steps/groups of programs, and is compatible with the automatic liquid feeding system to achieve full automatic control and effectively solve human factors. Suitable for metallographic grinding and polishing of various materials, convenient for multiple people to use and research on various materials, it is an ideal automatic grinding and polishing equipment for metallographic laboratories.


The uniqueness of METPOL-A semi-automatic metallographic polishing machine:


1. 5.5-inch large-sized color touch screen, clearer and easier to operate


2. Six samples can be ground and polished at once, and samples of different diameters can be ground and polished simultaneously through a variable diameter ring


3. The power head can be set with pneumatic limit, which increases the utilization rate of sandpaper and polishing cloth in automatic mode and reduces sample production costs


4. The automatic liquid feeding system has a polishing liquid reflux function to prevent blockage of the liquid feeding pipe


5. In order to prevent particle detachment during the polishing process, we can use silicon carbide metallographic sandpaper for grinding.

1. CarbiPaper Silicon Carbide Sandpaper P280


2. CarbiPaper silicon carbide sand paper P600


3. CarbiPaper Silicone Carbide Sandpaper P1200


4. CarbiPaper Silicon Carbide Sandpaper P2500


5. CarbiPaper silicon carbide sandpaper P4000


Kemai editor would like to remind you that during the grinding process, the speed of the metallographic polishing machine should be slowed down as much as possible to prevent particles from falling off, thereby affecting the overall polishing effect.


The above are some suggestions for the embedding and polishing of lithium batteries when analyzing their cross-section after forming. If you would like to learn about the sample preparation methods and steps of other materials, please feel free to contact Kemai's metallographic engineer.