Thin-wall plastic ultrasonic welded and encapsulated lithium-ion battery pack

Abstract

The invention discloses a thin-wall plastic ultrasonic welded and encapsulated lithium-ion battery pack, which comprises a hollow upper shell (1) and a hollow lower shell (4), wherein the upper shell (1) is located at the top part of the lower shell (4); the upper shell (1) is fastened to the lower shell (4); and a plurality of square single batteries (2) are placed on the lower shell (4) and are connected with a protection circuit board (3). The thin-wall plastic ultrasonic welded and encapsulated lithium-ion battery pack disclosed by the invention is compact in structure and good in encapsulation effect; thin-wall plastic ultrasonic welding and encapsulating are facilitated; the problem of poor part welding due to the fact that a weld line deviates from a weld surface can be solved; a large scale of industry can be formed; wide application is facilitated; and the thin-wall plastic ultrasonic welded and encapsulated lithium-ion battery pack has great production practice significance.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-ion battery pack encapsulated by ultrasonic welding of thin-walled plastics. Background technique [0002] With the worldwide energy crisis and climate warming, a new energy model is urgently needed in the field of transportation, and lithium-ion batteries have attracted widespread attention in the field of transportation due to their green environmental protection and high energy output. At present, Relevant industries around the world have launched extensive research on the application of lithium-ion batteries in this field. [0003] Lithium-ion battery packs have been widely used in portable power applications such as mobile phones, notebooks, and navigators. With the increase in functions and light weight of terminal products, lithium-ion battery packs are required to be small in size, light in weight and long in standby time. Therefore, the package structure of ...

AI Technical Summary

Problems solved by technology

When the product wall thickness is large, the product is not easy to deform, and there is enough space to design the welding line and positioning structure, ultrasonic welding is easy to realize, the welding strength is high, and the dimensional stability is good; while the product wall thickness is small and the product When it is relatively large, the product itself is prone to deformation, the welding line is prone to shift from the welding surface, and the parts are not welded well. In addition, when thin-walled parts are ultrasonically welded, it is easy to cause flashing problems

Images