Pole piece and manufacturing method thereof, diaphragm and manufacturing method thereof, electrode assembly and secondary battery

• Main Authors: TONG YILONG, WEN SHUAIWEI
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a pole piece and a preparation method thereof, a diaphragm and a preparation method thereof, an electrode assembly and a secondary battery, a developing part is arranged on a pole piece body, and at least part of the developing part is controlled to be located on the side face of the pole piece or the edge of the surface of the pole piece, so that the developing part exists on at least one end side of the periphery of the pole piece body. Therefore, in the nondestructive testing technology, the developing part is developed by utilizing the irradiation of the set rays, one end of the pole piece body is displayed, and whether the phenomena such as poor Overhang occur between the positive pole piece and the negative pole piece or not is judged according to the position of the displayed end, so that the defective secondary battery is quickly detected, the quality control quality and efficiency are improved, and the production cost is reduced. Therefore, the quality of the secondary batter