Manufacturing method and manufacturing apparatus for electrical device with film covering

Abstract

The invention provides a manufacturing method and a manufacturing apparatus for an electrical device with film covering. The manufacturing method for the electrical device with film covering according to the invention can be employed to realize the effect that electrolyte is hard to be uneven in permeation in a battery set so that the electrolyte can be filled within a short time period. The manufacturing method for the electrical device with film covering comprises a pressure reducing procedure for reducing the pressure inside an electrolyte filling cavity equipped with a bag-shaped laminated film package body to lower than the atmospheric pressure, wherein the bag-shaped laminated film package body is provided with an opening part and accommodates the battery set, and the battery set is provided with an anode and a cathode which are laminated up and separated by an insulating film; an electrolyte filling procedure for filling the electrolyte of a specified amount from the opening part into the package body, after the pressuring reducing procedure; and a pressuring increasing and reducing procedure for increasing the pressure inside the electrolyte filling cavity to higher than the pressure in the electrolyte filling procedure and then reducing the pressure, after the electrolyte filling procedure and before sealing the opening part.

Description

technical field [0001] The present invention relates to a manufacturing method and manufacturing apparatus of a film-encapsulated electrical device such as batteries and capacitors, in which electrical device elements are housed in a laminated film. Background technique [0002] Electric devices typified by electrolytic capacitors and batteries are manufactured by pouring an electrolytic solution into a case made of metal or the like in which an electrode group is incorporated to obtain an electric device element, and then sealing the case. In addition, in the description of this specification, a component having a positive electrode and a negative electrode laminated with a separator interposed therebetween and in a state (stage) before a series of electrolyte solution injection steps is completed is referred to as an "electrode group". Components in the state (stage) after a series of liquid injection processes of the electrolyte are called "electrical device components" t...

AI Technical Summary

Problems solved by technology

Until the static electrolyte naturally penetrates into the gap between the electrodes, it needs to be left for a whole day and night, and the production efficiency is extremely poor

[0011] In addition, there is a problem that the electrolytic solution does not permeate into the electrode group at the same speed, and the phenomenon that the electrolytic solution cannot be fully infiltrated (uneven penetration) tends to occur in the part where the electrolytic solution is permeated, especially in the center of the electrode group. )

[0012] In addition, the uneven penetration of the electrolyte solution in the electrode group locally produces a region in which the ion conductivity between the positive and negative electrodes is low in the plane, and as a result, the electrical characteristics of the battery are degraded.

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