Packaging method for lithium ion capacitor

Abstract

The invention, which belongs to the new energy storage element field, discloses a packaging method for a lithium ion capacitor. The method comprises: a metallic housing, a cover plate, an aluminum leading-out terminal, and a matched sealing element are designed; and a tab with an electric core prepared is welded with the aluminum leading-out terminal, the electric core is assembled into the metallic housing after insulating and welding processing and an upper cover plate and the sealing element are installed, and drying processing and liquid injection are carried out and then preparation of a single lithium ion capacitor is completed. On the basis of the improved packaging material and structure, a novel high-airtightness and high-reliability lithium ion capacitor with simple series and parallel connection is obtained, so that the strength and vibration-resistant performance of the single capacitor and the assembled system can be improved, a heating problem of the working process can be solved, and the product reliability and the service life can be enhanced. Therefore, installation, structural strength, and application process current-carrying problems can be solved.

Description

technical field [0001] The invention belongs to the field of new energy storage components, and in particular relates to a packaging method of a lithium ion capacitor. [0002] technical background [0003] Lithium-ion capacitors, also known as electrochemical hybrid capacitors and asymmetric electrochemical capacitors, are a new type of energy storage element between supercapacitors and batteries. It has higher specific capacity and good power performance than supercapacitors in transportation. It has important applications in the fields of energy, aerospace, green new energy and military. [0004] At present, most manufacturers of lithium-ion capacitors adopt the aluminum-plastic film soft package packaging technology. The main route of this technology is: firstly, put the aluminum-plastic film into the equipment with "concave" and "convex" molds on the upper and lower sides, and start the heating process at the same time. The aluminum-plastic film is processed and formed,...

AI Technical Summary

Problems solved by technology

In addition, we will introduce the situation of the installation and application of the soft packaging monomer: first of all, installation, because the whole monomer and the lead-out end of the soft packaging do not have a good stress point, resulting in series or parallel operation during energy and voltage expansion. It brings certain difficulties, even after the series-parallel connection is completed, there are potential safety hazards in its strength and anti-vibration effect. In order to improve the strength and anti-vibration effect, a set of metal chassis is independently designed according to the structure. It is a very complicated process to repair or replace the support monomer after it is abnormal; in addition, in terms of application, the current-carrying cross-sectional area of ​​the lead-out tab of the flexible packaging system monomer is 0.3-0.8mm 2 , due to the limited current-carrying cross-sectional area, charging and discharging will be affected to a certain extent during the working process, and frequent charging and discharging or high-power charging and discharging will cause the tabs to heat up, and continuous heating and heating will also lead to a rapid decline in product life or even fail

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