Packaging device for polymer lithium ion batteries and application thereof

Abstract

The invention provides a packaging device for polymer lithium ion batteries and an application thereof. The packaging device includes a workbench, a packaging head and a driving unit. The workbench isprovided with a sample space for placing a sample to be packaged. The packaging head is arranged close to the workbench and can generate an alternating magnetic field, and the position of the packaging head is configured to enable the alternating magnetic field to act on the sample to be packaged in the sample space. The driving unit is connected with the workbench or the packaging head, and is configured to enable the workbench and the packaging head to move relative to each other. Thus, the service life of the packaging head can be prolonged, and the cost can be reduced. Moreover, the packaging accuracy of the packaging device can be improved, and the operation safety factor can be improved. The alternating magnetic field generated by the packaging head directly acts on the aluminum layer of an aluminum-plastic film, and there is no need for heat transfer through the nylon layer of the aluminum-plastic film, so that non-uniform heat transfer caused by uneven thickness of the nylon layer is avoided. Furthermore, the packaging effect of polymer lithium-ion batteries can be improved, the utilization rate of heat can be increased, and the processing time can be shortened.

Description

technical field [0001] The invention relates to the technical field of battery packaging, in particular to a packaging device for polymer lithium ion batteries and applications thereof. Background technique [0002] Lithium-ion batteries are divided into liquid lithium-ion batteries and polymer lithium-ion batteries. Among them, polymer lithium-ion batteries are easy to assemble and light and thin, which has become the mainstream of lithium-ion battery development. [0003] During use, the polymer lithium-ion battery needs to be heat-sealed with a layer of aluminum-plastic film on the outside, so that it can be used as a protective carrier for the battery cell and undertake multiple protection tasks such as explosion-proof and leak-proof. Such as figure 1 As shown, the common structure of aluminum-plastic film includes Nylon layer 1 (nylon layer), Al layer 2 (aluminum layer) and CPP layer 3 (casting layer) that are stacked. It will directly affect the service life of the b...

AI Technical Summary

Problems solved by technology

[0005] 1) Since the thickness of the nylon layer 1 is uneven, the heat transfer is also uneven, resulting in loosening of the local heat seal of the aluminum-plastic film 8, thereby affecting battery performance;

[0006] 2) Since the metal heat sealing head 4 continues to generate heat, it affects the overall performance of the metal heat sealing head 4, thereby reducing the processing accuracy of the heat sealing equipment, and at the same time the life of the metal heat sealing head 4 itself is also reduced, and the metal heat seal needs to be replaced regularly The first 4, thereby increasing production costs;

[0007] 3) Since the heat is conducted through the packaging jig 6, the packaging jig 6 is heated and deformed, reducing the life of the packaging jig 6, and the packaging jig 6 needs to be replaced regularly, thereby further increasing the production cost

[0008] Therefore, the research on packaging devices for polymer lithium-ion batteries needs to be further studied.

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