Combined battery

Abstract

The present invention relates to a combined battery, which includes: a cell assembly; and a first casing, which is coated on the outer surface of the cell assembly, and the first casing includes: a first substrate; a first side wall, extending from a first edge of the first substrate along a first direction, wherein the first direction is a direction perpendicular to the first substrate; and a second sidewall extending from a second edge of the first substrate along the first direction Extending, the first edge and the second edge are located on different sides of the first substrate and adjacent to each other, the first side wall is adjacent to and connected to the second side wall and has a first connection portion, and the first connection The portion has a first through hole penetrating from the outer side of the first connecting portion to the inner side of the first connecting portion, so that the first side wall part is connected with the second side wall part. In the present invention, the connecting portion is provided between the side walls of the casing to partially connect the side walls, which prevents the side walls of the casing from warping and deforming when the battery is impacted by an external force, thereby improving the safety of the battery package.

Description

technical field [0001] The invention relates to a combined battery, especially a combined battery with improved structural design aimed at the overall thickness of the battery structure and the safety of packaging. Background technique [0002] Under the premise of the same capacity, polymer lithium-ion batteries are widely used in mobile phones due to their small size, light weight, long cycle life (more than 1000 times), and no memory effect (can be used and charged without affecting performance). , Handheld computers, laptop computers, camcorders, DVD players, electric bicycles and automobiles and other products. At present, with the rapid development of ultra-thin mobile phones, PDAs, and laptops, it is bound to require polymer lithium-ion battery cells to maintain high capacity while developing towards a thinner and lighter appearance. It is known that the battery cells of polymer lithium-ion batteries belong to the flexible packaging structure, and the battery cells n...

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned way of realizing battery packaging through the cooperation of metal plates and plastic frames has the following problems: 1) the plastic frame itself has a certain thickness, which increases the overall thickness of the battery structure, which deviates from the development needs of light and thin; 2) the metal plate side There are discontinuous fitting pieces on the side. When the battery is subjected to external impact, the fitting pieces are easily deformed and lifted, which affects the safety of the packaging.

Images