Battery cell and battery pack

• Main Authors: LI JINCHENG, SUN CHAO, GONG WEIHONG, ZHOU JIE
• Format: Patent
• Language: Chinese; English
• Published: 07.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to the technical field of batteries, and discloses a battery cell and a battery pack, the battery cell comprises: a housing having an opening; the cover plate is arranged corresponding to the opening and is connected with the shell so as to define a containing space; the electrode group is arranged in the accommodating space, the electrode group comprises electrode lugs, ultrasonic welding marks are arranged on the electrode lugs to connect the electrode lugs which are arranged in a layered mode, the electrode lugs and the cover plate are welded through laser to form laser welding marks on the electrode lugs, and the laser welding marks are located in the ultrasonic welding marks; the distances from the edge of the laser welding mark to the edge of the corresponding ultrasonic welding mark are a, b, c and d respectively, and a is larger than or equal to 0.5 mm, b is larger than or equal to 0.5 mm, c is larger than or equal to 0.5 mm, and d is larger than or equal to 0.5 mm. The t