JP2009135374A - Manufacturing method and manufacturing apparatus for electric double-layer capacitor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method and a manufacturing apparatus for an electric double-layer capacitor, which carries out electrolyte filling/immersion efficiently in a short period of time without using a pressure-resistant chamber, such as a pressure-resistant bath. <P>SOLUTION: The manufacturing apparatus includes: a sealing jig 20 which is attached to seal an opening of a container 10 in a state where an injection nozzle 21 and an air supply/discharge nozzle 22 are inserted through the opening of a container 10 into the inside thereof to let part of the nozzles 21 and 22 project out of the opening of the container 10; a facility (pipeline 61 in Fig.3) for supplying an electrolyte in a reserve tank 60 to the injection nozzle 21; and a facility (pipeline 69 in Fig.3) for selectively connecting a vacuum pump 66 and a supply source of a highly dry constant pressure inert gas to the air supply/discharge nozzle 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for manufacturing an electric double layer capacitor and an apparatus for manufacturing the same.

  2. Description of the Related Art In recent years, attention has been focused on application technologies for electric double layer capacitors that can be rapidly charged and have a long charge / discharge cycle life as various power storage devices.

  The electric double layer capacitor includes a step of forming a laminate (capacitor body) from a positive electrode body and a negative electrode body and a separator, a step of accommodating the laminate in a container, and an electrolyte solution in the laminate by filling the container with an electrolyte solution. And the like, and the process of sealing the opening of the container (Patent Document 1).

  In the conventional case, in the electrolytic solution filling and impregnating step, a sealable tank 1 as shown in FIG. 8 is used. Inside the tank 1 that can be sealed, the container 2 (which accommodates the laminated body) is supported in an upright state in which the opening portion faces upward. 3 is a storage tank for the electrolyte, and the liquid surface is pressurized by a highly dry inert gas (argon gas). One end of the pipe is opened at the lower part of the tank 3, and a nozzle (not shown) is connected to the other end of the pipe. The nozzle is equipped with a valve mechanism for opening and closing the outlet (injection port) of the electrolytic solution. When the valve mechanism is opened, the electrolytic solution is filled into the container 2 from the injection port.

  In order to facilitate the impregnation of the laminate, a vacuum pump 4 and a highly dry source of inert gas at normal pressure (not shown) are provided. One end of the pipe is connected to the tank 1, the other end of the pipe is branched, a vacuum pump 4 is connected to one of the pipes, and the other is connected to a supply source of normal pressure inert gas (normal pressure supply source). The A passage switching valve (not shown) is provided at a branch portion of the pipe. The passage switching valve includes an A position for connecting the tank 1 side to the vacuum pump 4 side, a B position for connecting the tank 1 side to the supply source side, a connection between the tank 1 side and the vacuum pump 4 side, and a tank 1 side. It is possible to switch to the three positions, ie, the C position that cuts off the connection with the normal pressure supply source side.

  When the passage switching valve is switched to the A position, the inside of the sealed tank 1 is depressurized by driving the vacuum pump 4. When the inside of the tank 1 reaches a predetermined degree of vacuum, the vacuum pump 4 is stopped. Thereafter, when the passage switching valve is switched to the B position, an inert gas at normal pressure is supplied into the sealed tank 1 and the inside of the tank 1 is relatively pressurized. By repeating such treatment, the electrolytic solution spreads over every corner of the laminate, and the impregnation of the electrolytic solution can be treated efficiently. Reference numeral 5 denotes a glove box, and the inside thereof is managed in an atmosphere of a highly dry inert gas (argon gas). The tank 1 is installed inside the glove box.

In Patent Document 2 and Patent Document 3, the opening of the case housing the electrode group is closed in an airtight chamber, the airtight chamber is depressurized to depressurize the case, and then the electrolyte is pressed into the case. A method is disclosed.
JP 2003-297689 JP 09-286418 A JP-A-10-055808

  In such conventional examples (Patent Literature 1 to Patent Literature 3), a pressure-resistant chamber (a hermetic chamber for sealing a container or an airtight chamber for closing an opening of a case) is used. It takes a long time to depressurize a closed tank or hermetic chamber.

  In the filling methods of Patent Document 2 and Patent Document 3, the pressure of the hermetic chamber is reduced with respect to one case by one device, and then the electrolyte is pressed into the case after the pressure in the case is reduced. If this is the case, the number of devices that handle the filling of the electrolyte must be increased.

  In the case of Patent Document 1, since the sealable tank is installed inside a probe box (managed in a highly dry inert gas atmosphere), a large capital investment is required for mass production of electric double layer capacitors. The

  The present invention has been made paying attention to such problems, and a method of manufacturing an electric double layer capacitor capable of efficiently processing filling and impregnation of an electrolytic solution in a short time without using a pressure chamber such as a tank, and It aims at providing the manufacturing apparatus.

  The first invention comprises a step of composing a laminate from a positive electrode body and a negative electrode body and a separator, a step of accommodating the laminate in a container formed from a laminate film, and an electrolytic solution from the opening of the container to the inside thereof. In a method for manufacturing an electric double layer capacitor comprising the steps of filling and impregnating the laminate, and sealing the opening of the container, the laminate is filled with an electrolyte from the opening of the container In the impregnation step, a liquid injection nozzle and an air supply / exhaust nozzle are inserted into the inside of the opening of the container and sealed so as to seal the opening of the container so that a part of them protrudes from the opening of the container to the outside. A step of attaching a jig, a step of depressurizing the inside of the container through the air supply / exhaust nozzle, a step of relatively pressurizing the inside of the container from the depressurized state through the air supply / exhaust nozzle, and an electric current to the inside of the container through the injection nozzle. To characterized by comprising the step of filling the liquid, the.

  According to a second aspect of the present invention, in the method for manufacturing the electric double layer capacitor according to the first aspect, the step of filling the inside of the container with the electrolytic solution through the liquid injection nozzle includes the step of supplying the electrolytic solution from the electrolytic solution storage tank to the liquid injection nozzle. It is characterized by pumping.

  According to a third aspect of the present invention, in the method for manufacturing an electric double layer capacitor according to the second aspect of the invention, the step of filling the inside of the container with the electrolytic solution through the liquid injection nozzle is performed from the electrolytic solution storage tank to the liquid injection nozzle. The process of pressure-feeding and the process of decompressing the inside of the container through the air supply / exhaust nozzle are alternately repeated.

  According to a fourth aspect of the present invention, in the method for manufacturing the electric double layer capacitor according to the second or third aspect, the step of filling the laminate with an electrolyte from the opening of the container and impregnating the laminate is an electrolytic process. And a step of evacuating the inside of the liquid storage tank by evacuation, and a step of relatively pressurizing the inside of the electrolytic solution storage tank from a reduced pressure state.

  5th invention is a manufacturing method of the electrical double layer capacitor which concerns on any one of 1st invention-4th invention, The said injection nozzle processes the process of filling the inside of the said container with electrolyte solution A connector part that is separably connected to piping on the equipment side, and a normally closed valve mechanism that opens only when the connection port is connected to the pipe, and the air supply / exhaust nozzle is disposed inside the container. A connector part that is detachably connected to the equipment side pipe that processes the step of depressurizing and the step of relatively pressurizing the inside of the container from the depressurized state, and the normally closed that opens the connection port only when the pipe is connected The valve mechanism is provided.

  The sixth invention includes a step of composing a laminate from a positive electrode body and a negative electrode body and a separator, a step of accommodating the laminate in a container formed from a laminate film, and an electrolytic solution from the opening of the container to the inside thereof. In an electric double layer capacitor manufacturing apparatus provided with each of the processing means of filling and impregnating the laminate, and sealing the opening of the container, the electrolytic solution is filled into the inside from the opening of the container. The processing means of the step of impregnating the laminate is to insert the liquid injection nozzle and the air supply / exhaust nozzle into the inside of the container from the opening of the container so that a part of them protrudes from the container opening to the outside. A sealing jig mounted to seal the part, equipment for supplying the electrolytic solution of the storage tank to the liquid injection nozzle, a vacuum pump and a highly dry normal pressure inertness to the air supply / exhaust nozzle Gas source and Wherein the and a facility for selectively connecting.

  According to a seventh aspect of the present invention, in the electric double layer capacitor manufacturing apparatus according to the sixth aspect of the present invention, a vacuum pump and a highly dry inert gas supply source are selectively used for the electrolyte storage tank. And a facility for connecting to the device.

  According to an eighth aspect of the present invention, in the method for manufacturing the electric double layer capacitor according to the sixth aspect or the seventh aspect, the injection nozzle is separable from a facility-side pipe for supplying the electrolytic solution of the storage tank. A connector part to be connected, and a normally closed valve mechanism that opens only when the connection port is connected to the pipe, and the air supply / exhaust nozzle includes the vacuum pump and the supply source of the inert gas. It comprises a connector part that is separably connected to piping on the equipment side for selective connection, and a normally closed valve mechanism that opens its connection port only when connected to the pipe.

  In the first invention, the opening of the container is sealed (sealed) by a sealing jig so that a liquid injection nozzle and a supply / exhaust nozzle are inserted and a part of the opening protrudes from the opening of the container. ) In this state, the step of decompressing the inside of the container through the supply / exhaust nozzle, the step of relatively pressurizing the inside of the container from the decompression state through the supply / exhaust nozzle, and the step of filling the inside of the container with the electrolyte through the injection nozzle Processing is performed according to a predetermined procedure. That is, the container is sealed with a sealing jig, and the filling of the electrolyte and the impregnation into the laminated body are promoted through the injection nozzle and the supply / exhaust nozzle, and the reduced pressure is limited to the inside of the container. The treatment time for filling and impregnation can be shortened.

  About the process of decompressing the inside of the container, the process of relatively pressurizing the interior of the container from the decompressed state, and the process of filling the interior of the container with the electrolyte, a plurality of containers sealed with a sealing jig, When each injection nozzle is merged and each supply / exhaust nozzle is merged, processing can be performed simultaneously, and the container is held in a sealed state by a sealing jig, so the electrolyte is filled outside the glow box. It is also possible to perform an impregnation process. As a result, it is possible to efficiently mass-produce electric double layer capacitors while minimizing capital investment.

  In the second invention, since the electrolytic solution is pumped to the injection nozzle, filling of the container and impregnation of the laminate can be promoted.

  In the third invention, the electrolytic solution is supplied in several times, and the process of pumping a single amount of the electrolytic solution into the interior of the container and the process of decompressing the interior of the container are repeated alternately. Therefore, filling of the electrolytic solution and impregnation into the laminate can be promoted.

  In the fourth aspect of the invention, moisture and electrolyte contained in the gas phase in the storage tank are obtained by repeating the process of depressurizing the interior of the storage tank by evacuation and the process of relatively pressurizing the interior of the storage tank. Bubbles contained in (liquid phase) can be removed.

  In the fifth invention, since the liquid injection nozzle and the air supply / exhaust nozzle are provided with a normally closed valve mechanism, the container can be taken out of the glow box after the sealing jig is attached. That is, since the process of depressurizing the inside of the container, the process of relatively pressurizing the interior of the container from the depressurized state, and the process of filling the electrolyte inside the container can be performed outside the glove box, the processing means of these processes Is no longer required to be installed inside the glove box.

  In the sixth invention, the opening of the container is sealed (sealed) by a sealing jig so that a liquid injection nozzle and an air supply / exhaust nozzle are inserted and a part of the opening protrudes from the opening of the container. ) In this state, the equipment for supplying the electrolyte in the storage tank to the liquid injection nozzle and the vacuum pump and the highly dry inert gas supply source at high pressure are selectively connected to the air supply / exhaust nozzle. The facilities for promoting the filling of the electrolytic solution and the impregnation into the laminate are facilitated. Since the decompression is limited to the inside of the container, the treatment time for the electrolyte filling impregnation can be shortened. In addition, when each injection nozzle is joined to each of the containers sealed by the sealing jig and each supply / exhaust nozzle is joined, supply of electrolyte, decompression by a vacuum pump, and inert gas under normal pressure In addition to being able to process the supply simultaneously, since the container is held in a sealed state by the sealing jig, it is also possible to perform the impregnation treatment with the electrolyte solution outside the glow box.

  In 7th invention, it is contained in the gaseous phase in a storage tank by repetition of the process which decompresses the inside of a storage tank with a vacuum pump, and the process which supplies an inert gas of a normal pressure to the inside of a storage tank Bubbles contained in moisture or liquid phase (electrolytic solution) can be removed.

  In the eighth invention, since the liquid injection nozzle and the air supply / exhaust nozzle are provided with a normally closed valve mechanism, the container can be taken out of the glow box after the sealing jig is attached. In other words, outside the glove box, the equipment for supplying the electrolyte in the storage tank to the injection nozzle and the supply source of the vacuum pump and the highly dry inert gas at high pressure to the supply / exhaust nozzle are selected. With the equipment for connection, the filling of the electrolytic solution and the impregnation into the laminate can be promoted. As a result, these facilities do not need to be placed inside the glove box.

An example of the electric double layer capacitor will be described with reference to FIG. In FIG. 1, 10 is a container for storing a capacitor body together with an electrolyte, and a pair of terminal plates 11a and 11b (cell electrodes) drawn out of the container 10, and each terminal plate 11a and 11b is lightweight and has a resistance. It is formed in a short shape from small aluminum. Reference numeral 12 denotes a gas vent valve for removing gas (CO ₂ or the like) generated inside the container 10 to the outside of the container 10, and is assembled between the pair of terminal plates 11 a and 11 b at the upper part of the container 10. .

  The capacitor main body is configured in a predetermined laminate from a positive electrode body, a negative electrode body, and a separator. The positive electrode body and the negative electrode body are composed of a collector electrode and polarizable electrodes (activated carbon electrodes) on both sides thereof. These collector electrodes are made of a rectangular metal foil (for example, an aluminum foil), and a strip-shaped lead portion is integrally formed on one side of the rectangular plane. The same polarity of each lead part is bundled, and terminal board 11a, 11b corresponding to polarity is joined to this binding part. The separator interposed between the positive electrode body and the negative electrode body is formed from a porous film made of paper or resin.

  The container 10 is composed of two container members (a bottom side portion and a lid side portion) formed by cold pressing from a flexible laminated film (for example, an aluminum laminated film) including a metal intermediate layer in a plurality of resin layers. Thus, when these are combined, the accommodating portion of the capacitor body (laminated body) is formed between the bottom side portion and the lid side portion by the concave portions facing each other.

  The laminated body is placed inside the bottom side portion, and the lid side portion is put thereon. At the peripheral edge of the container 10, three sides except for one side from which the pair of terminal plates 11a and 11b (parts thereof) are drawn are heat-sealed (heat sealed). The container 10 can be opened on one side from which the pair of terminal plates 11a and 11b protrudes, and the liquid injection nozzle 21 (see FIGS. 3 to 5) and the supply / exhaust nozzle 22 (see FIGS. 3 to 5) from the opening. ) Is inserted and a part of these protrudes to the outside of the container, and a sealing jig 20 (see FIGS. 3 to 5) is attached to temporarily seal the opening of the container, and the electrolyte is filled. When the impregnation process and the electrolytic purification process are finished, the sealing jig 20 is removed, the injection nozzle and the supply / exhaust nozzle are extracted, and the openable side of the container 10 has a pair of terminal plates 11a and 11b and a gas release valve. 12 is heat-sealed in a sealed state.

  In order to ensure insulation between the pair of terminal plates 11a and 11b (aluminum plate) and the metal layer of the laminated film forming the container 10, a heat-welding resin 53 (see FIG. 3) is attached to the terminal plates 11a and 11b in advance. ) Is attached. As the heat-welding resin 53, a resin mainly composed of PP (polypropylene) is used. On one side where the container 10 can be opened, the heat-welding resin 53 is melted by a heat-welding (heat-sealing) process, and a pair of terminal plates 11a and 11b are welded to the inner surface of the container 10 (the resin layer of the laminated film). It is. The molten heat-welding resin 53 wraps around the terminal plates 11a and 11b, and prevents the terminal plates 11a and 11b from coming into contact with the metal layer of the laminated film (causing leakage current).

  The degassing valve 12 is provided with a heat welding portion 54 (see FIG. 3) on its body. On one side of the container 10 that can be opened, the container 10 is assembled to the upper part of the container 1 (between the terminal plates 11a and 11b) via the heat welding part 12 of the body by heat sealing. It is welded to the resin layer of the laminated film forming the container 10 by melting the heat welding part.

  3 to 5 show the mounting state of the sealing jig 20, and the jig 20 has a base 25 having a substantially U-shaped cross section, a pair of pressing plates 26, and a distance between these pressing plates 26. And a clamp mechanism 27 that expands and contracts. The pair of pressing plates 26 are arranged inside a substantially U-shaped cross section of the base portion 25, and are opposed to each other via a plurality of guide pins 28 at both ends of the substantially U-shaped cross section of the base portion 25 (the cross-section of the base portion 25 is substantially omitted). It is supported so as to be movable in the direction perpendicular to both ends of the U-shape.

  The clamp mechanism 27 is provided with a rod 30 capable of advancing and retracting both end portions of a substantially U-shaped cross section of the base portion 25 in a direction orthogonal thereto. A pressing plate 26 is coupled to the tip of the rod 30, and the rear end of the rod 30 is connected to a lever 32 via a toggle mechanism 31. When the lever 32 turns, the distance between the pair of pressing plates 26 is increased accordingly. It scales. Reference numeral 33 denotes a pressure contact tool for the opening of the container 10, which is formed of an elastic body such as silicon sponge, and is attached to the opposing surface of each pressing plate 26.

  The liquid injection nozzle 21 and the air supply / exhaust nozzle 22 are fixed in a penetrating state at an intermediate portion of the base 25 having a substantially U-shaped cross section. In addition, a slit-like through hole 34 is formed in the middle portion of the base portion 25 so as to pass through the terminal plates 11a and 11b protruding from one openable side of the container 10, and the tips of the terminal plates 11a and 11b are locked at the center portions thereof. A terminal holding portion 35 (positioning the height of the terminal plates 11a and 11b) is attached by a bolt 36. One end of the set guide 38 of the gas vent valve 12 is attached to the tip of the bolt 36, and the body (end portion on the outlet side) of the gas vent valve 12 is fitted to the other end of the set guide 38. The set guide 38 has a flat middle portion between the mounting portion with the bolt 36 and the fitting portion with the gas vent valve 12, and the opening portion of the container 10 is sealed by the pressure contact tool 33 of the sealing jig 20. It has become easier. For the liquid injection nozzle 21 and the air supply / exhaust nozzle 22 as well, the opening of the container 10 is easily sealed by the pressure contact tool 33 of the sealing jig 20, and the portion that penetrates the sealing region is set to the minimum diameter portion.

  The liquid injection nozzle 21 and the air supply / exhaust nozzle 22 are normally closed, which are opened only when the pipes 61 and 69 are connected to the connector parts 42 and 43 that are separably connected to the equipment-side pipes 61 and 69 described later. A valve mechanism (not shown). The facility-side connector portions 44 and 45 are also provided with a normally closed valve mechanism (not shown) that opens only when the connection ports are connected to the nozzle-side connector portions 42 and 43.

  3 and 4, reference numeral 46 denotes a setting jig for the container 10, which is composed of a pair of plate members 47 and 48, and means for fastening them at a constant interval. A frame-shaped pedestal portion 49 is provided on one 47 of the pair of plate members, and the other plate member 48 is engaged with the bulged portion on the front side of the concave portion (container of the laminated body) of the container 10. The container 10 is supported in an upright state in which one side that can be opened is directed upward.

  Means for tightening the pair of plate members 47 and 48 at a constant interval includes a fastener 50 (such as a bolt) and a rod 51 having a flange. The rod 51 having a flange portion is erected on one 47 of a pair of plate members, and a hole that is engaged with the flange portion of the rod 51 is disposed on the other plate member 48. Since the thickness of the container 10 is regulated by the setting jig 46, the product can be homogenized.

  When mounting the sealing jig 20 on one openable side of the container 10, the lever is tilted to the open side to expand the space between the pair of pressure contactors 33, and the container 10 can be opened from above as shown in FIG. 6. By covering one side, the openable side of the container 10 enters the inside of the U-shaped cross section of the base 25. Along with this, the terminal plates 11a and 11b protruding from one openable side of the container 10 penetrate the slit-like through hole 34, and the degassing valve 12 and its set guide 38 project inside the U-shaped cross section of the base 25. Subsequently, the liquid injection nozzle 21 and the air supply / exhaust nozzle 22 are inserted into the container 10 through the opening. It should be noted that a side of the container 10 that can be opened is preferably provided with a receiving portion that opens easily so as to accept the insertion of the gas vent valve 12, the set guide 38, the liquid injection nozzle 21, and the air supply / exhaust nozzle 22.

  After the degassing valve 12, the set guide 38, the liquid injection nozzle 21, and the air supply / exhaust nozzle 22 are inserted, when the lever 32 is tilted to the closed side, the pair of pressing plates 26 move in a direction to reduce the interval between them, and the pressure contact 33 Sandwiches one openable side of the container 10 (see FIG. 7). The pressure contact tool 33 is formed of an elastic body such as silicon sponge, and sandwiches the openable side of the container 10 between the terminal plates 11a and 11b and the set guide 38 of the gas vent valve 12, the liquid injection nozzle 21, and the air supply / exhaust nozzle 22. Can be adhered (sealed).

  In FIG. 3, reference numerals 55a and 55b denote connection terminals of a device for performing electrolytic purification, which are connected to a pair of terminal plates 11a and 11b protruding from the sealing jig 20, respectively.

  FIG. 2 illustrates the configuration of an apparatus for performing an electrolytic solution filling impregnation process and an electrolytic purification process. The container 10 that houses the laminated body (capacitor body) is sealed on one side that can be opened by a sealing jig 20. Is done.

  Reference numeral 60 denotes an electrolyte storage tank. One end of the pipe 61 is opened at the bottom of the tank 60, and the other end of the pipe 61 is connected to the connector part 43 of the liquid injection nozzle 21 via the connector part 45. On-off valves 62 and 63 are arranged in the middle of the pipe 61, and a pressurizing pump 64 and an integrated flow meter 65 are interposed therebetween.

  A vacuum pump 66 is driven by a motor 67. Reference numeral 68 denotes a decompressor for the vacuum pump 66. In addition, a highly dry source of atmospheric pressure argon gas (not shown) is provided. One end of the pipe 69 is connected to the connector portion 42 of the air supply / exhaust nozzle 22 via the connector portion 44. The other end of the pipe 69 is branched into two systems, a vacuum pump 66 is connected to one of them, and a normal pressure argon gas supply source (normal pressure supply source) is connected to the other.

  The storage tank 60 is provided with an air supply / exhaust pipe 70. One end of the pipe 70 is opened at the upper part in the tank 60, and the other end of the pipe 70 is connected to the normal pressure supply source side of the pipe 69.

  On-off valves 71 to 75 are arranged in the respective pipes 69 and 70. When the on-off valves 74 and 75 are opened, argon gas is introduced into the upper part (gas phase) of the tank 60 from the normal pressure supply source. When the on-off valves 62 and 63 are opened and the pressure pump 64 is driven, the electrolytic solution is supplied from the tank 60 to the inside of the container 10 through the liquid injection nozzle 21. When the on-off valves 62, 63, 73 are closed and the on-off valves 71, 72 are opened and the vacuum pump 66 is driven, the inside of the container 10 is depressurized through the supply / exhaust nozzle 22. When the on-off valves 71 and 62.63 are closed and the on-off valves 72 to 74 are opened, argon gas is supplied from the atmospheric pressure supply source into the container 10 through the air supply / exhaust nozzle 22. When the on-off valves 72, 74 are closed and the on-off valves 71, 73, 75 are opened and the vacuum pump 66 is driven, the inside of the tank 60 is decompressed.

  From the storage tank 60, the vacuum pump 66, the normal pressure supply source, the piping 61, 69, 70, the on-off valves 62, 63, 71 to 75, and the pressurization pump 64, , Equipment for selectively connecting the vacuum pump 66 and the normal pressure supply source to the supply / exhaust nozzle 22, and the vacuum pump 66 and normal pressure to the electrolyte storage tank 60 And an equipment for selectively connecting the supply source.

  In the electrolytic solution filling impregnation treatment, the following steps (1) to (4) are sequentially performed.

  (1) The sealing jig 20 is attached to the openable side of the container 10. The openable side of the container 10 is sealed by the sealing jig 20 so that the terminal plates 11 a and 11 b and the set guide 38 of the gas vent valve 12, the liquid injection nozzle 21, and the air supply / exhaust nozzle 22 are sandwiched. Further, the connector part 45 of the pipe 61 is connected to the connector part 43 of the liquid injection nozzle 21 and the connector part 44 of the pipe 69 is connected to the connector part 42 of the air supply / exhaust nozzle 22.

  (2) The inside of the container 10 is depressurized to a predetermined degree of vacuum. When the on-off valves 62, 63, 73 are closed and the on-off valves 71, 72 are set in an open state and the vacuum pump 66 is driven, the inside of the container 10 is depressurized by evacuation and reaches a predetermined degree of vacuum. The on-off valve 71 is closed and the vacuum pump 66 is stopped. Thereby, moisture and impurities in the container 10 are eliminated.

  (3) The inside of the container 10 is relatively pressurized from the reduced pressure state. When the on-off valves 62, 63, 71 are closed and the on-off valves 72, 73, 74 are opened, argon gas is supplied from the normal pressure supply source to the inside of the container, and the inside of the container 10 is raised to normal pressure. .

  (4) The container 10 is filled with an electrolytic solution and impregnated into the laminate. When the on-off valve 72 is closed and the on-off valves 74, 75, 62, 63 are set in an open state and the pressurizing pump 64 is driven, the electrolyte in the storage tank 10 is press-fitted into the container 10. The electrolytic solution is pumped in several times. When the pumping of one amount is finished, the pressurizing pump 64 is stopped and the on-off valves 62 and 63 are closed. At the same time, the on-off valve 73 is closed and the on-off valves 71 and 72 are set in an open state, and the vacuum pump 66 is driven to depressurize the inside of the container 10 to a predetermined degree of vacuum. When the inside of the container 10 reaches a predetermined degree of vacuum, the on-off valves 71 and 72 are closed and the vacuum pump 66 is stopped. These processes (electrolyte feeding and decompression inside the container) are repeated several times alternately.

  Moreover, before the process of (4), the water | moisture content contained in the gaseous phase in the storage tank 60 and the bubble contained in electrolyte solution (liquid phase) are excluded. When the on-off valves 62, 63, 74 are closed and the on-off valves 71, 73, 75 are set in an open state and the vacuum pump 66 is driven, the inside of the tank 60 is decompressed by evacuation. Thereafter, when the vacuum pump 66 is stopped and the on-off valves 71 and 75 are closed and the on-off valves 74 and 75 are set in an open state, argon gas is supplied from the normal pressure supply source to the inside of the tank 60. To normal pressure. These processes (depressurization inside the tank and supply of normal pressure) may be performed simultaneously with the process (2) and the process (3).

Electrolytic refining is a process in which residual moisture and functional groups in the laminate (capacitor body) are electrolyzed and removed by changing to CO ₂ or the like, and a constant current is passed between the pair of terminal boards 11a and 11b. Charge to set voltage and then discharge. This charging / discharging cycle is repeated several times, and gas (CO ₂ or the like) generated at that time is exhausted from the inside of the container 10 by evacuation. Therefore, the on-off valves 62, 63, 73 are closed and the on-off valves 71, 72 are set in an open state, and the vacuum pump 66 is driven. When this process is finished, the vacuum pump 66 is stopped and the on-off valves 71 and 72 are closed.

In the manufacturing process of the electric double layer capacitor, each constituent material of the electric double layer capacitor (the positive electrode body, the negative electrode body and the separator material, the terminal plates 11a and 11b, the bottom side portion and the lid side portion of the container 10) is dried. . Thereafter, in a highly dry inert gas (argon gas) atmosphere of the glove box, the molding of the positive electrode body and the negative electrode body, the molding of the separator, the composition to the laminate, the joining of the terminal plates 11a and 11b, the laminate In addition to housing in the container 10, steps from electrolytic solution filling impregnation and electrolytic purification to sealing (heat-sealing) one openable side of the container 10 are sequentially performed. In the apparatus for processing the electrolytic solution filling impregnation and electrolytic purification, the discharge side of the vacuum pump 66 is connected to the outside of the glove box and connected to an inert gas (argon gas) regenerator including a purifier such as CO _2. Is done.

  With such a configuration, the opening of the container 10 is sealed by the sealing jig 20, and the volume to be depressurized is limited to the inside of the container 10 in the electrolytic solution filling process. Can be done in a short time. Further, it is not necessary to use a pressure-resistant chamber (tank or airtight chamber) as in the prior art, and the inside (space) of the glove box can be effectively utilized by that amount.

  The injection nozzle 21 has a connector part 43 that is separably connected to the equipment-side pipe 61 for supplying the electrolytic solution in the storage tank 60, and a normally closed valve mechanism that opens only when the connection port is connected to the pipe ( And the supply / exhaust nozzle 22 is connected to a facility-side pipe 69 for selectively connecting the vacuum pump 66 and the atmospheric pressure supply source, and a connector part 42 is detachably connected. And a normally closed valve mechanism (not shown) that opens only at the time of connection to the pipe, and after the mounting of the sealing jig 20 (sealing of one side where the container 10 can be opened), the container 10 Can be taken out of the glow box. That is, equipment for supplying the electrolytic solution of the storage tank 60 to the liquid injection nozzle 21, equipment for selectively connecting the vacuum pump 66 and the normal pressure supply source to the air supply / exhaust nozzle 22, The facility for selectively connecting the vacuum pump 66 and the normal pressure supply source to the electrolytic solution storage tank 60 is not required to be disposed inside the glove box.

  Further, for a large number of containers 10 sealed by the sealing jig 20, a pipe for joining the liquid injection nozzles 21 of each container 10 is provided, and this is connected to the pipe 61 of FIG. By providing a pipe to be merged and connecting it to the pipe 69 of FIG. 2, it is possible to simultaneously perform the electrolyte filling impregnation treatment and the electrolytic purification treatment.

  As a result, it is possible to efficiently mass-produce electric double layer capacitors while minimizing capital investment.

1 is an external view of an electric double layer capacitor illustrating an embodiment of the present invention. It is a schematic diagram explaining an electrolyte solution filling impregnation process and the apparatus similarly. It is a front view explaining the mounting state of a sealing jig. It is a side view which omits a part similarly. It is XX sectional drawing of FIG. 3 similarly. It is explanatory drawing which similarly concerns on mounting | wearing of a sealing jig. It is explanatory drawing similarly. It is explanatory drawing of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Container 11a, 11b Terminal board 12 Degassing valve 20 Sealing jig 21 Injection nozzle 22 Supply / exhaust nozzle 33 Pressure contact 38 Degassing valve set guide 42, 43 Connector part 60 Electrolyte storage tank 64 Pressure pump 66 Vacuum pump 62, 63, 71-75 Open / close valve

Claims (8)

A step of composing a laminate from a positive electrode body and a negative electrode body and a separator, a step of accommodating the laminate in a container formed from a laminate film, and filling the inside with an electrolyte from the opening of the container to form a laminate In the method of manufacturing an electric double layer capacitor comprising the step of impregnating and the step of sealing the opening of the container, the step of impregnating the laminate by filling the electrolyte from the opening of the container A step of attaching a sealing jig to seal the opening of the container so that a liquid injection nozzle and a supply / exhaust nozzle are inserted into the inside of the opening from the opening of the container and a part of these is projected to the outside from the opening of the container And a step of decompressing the inside of the container through the air supply / exhaust nozzle, a step of relatively pressurizing the inside of the container from the decompressed state through the air supply / exhaust nozzle, and filling the inside of the container with the electrolyte through the liquid injection nozzle Method of manufacturing an electric double layer capacitor which comprising: the degree, the. 2. The method of manufacturing an electric double layer capacitor according to claim 1, wherein the step of filling the inside of the container with the electrolytic solution through the liquid injection nozzle feeds the electrolytic solution from the electrolytic solution storage tank to the liquid injection nozzle. The process of filling the inside of the container with the electrolytic solution through the liquid injection nozzle is alternately performed by a process of pumping the electrolytic solution from the electrolytic solution storage tank to the liquid injection nozzle and a process of decompressing the interior of the container through the supply / exhaust nozzle. 3. The method of manufacturing an electric double layer capacitor according to claim 2, wherein the method is repeated. The step of filling the inside of the container with the electrolytic solution from the opening of the container and impregnating the laminate includes the step of depressurizing the inside of the electrolytic solution storage tank by evacuation, and the inside of the electrolytic solution storage tank from the reduced pressure state. The method of manufacturing an electric double layer capacitor according to claim 2, further comprising a relatively pressurizing step. The injection nozzle includes a connector part that is separably connected to piping on the equipment side that processes the step of filling the electrolytic solution into the container, and a normally closed valve that opens only when the connection port is connected to the pipe And the supply / exhaust nozzle is detachably connected to a facility-side pipe that processes a step of depressurizing the interior of the container and a step of relatively pressurizing the interior of the container from a depressurized state. The electrical double layer capacitor according to any one of claims 1 to 4, further comprising: a connector portion that is closed and a normally closed valve mechanism that opens a connection port only when connecting to the pipe. Production method. A step of composing a laminate from a positive electrode body and a negative electrode body and a separator, a step of accommodating the laminate in a container formed from a laminate film, and filling the inside with an electrolyte from the opening of the container to form a laminate In an electric double layer capacitor manufacturing apparatus including the impregnation step and the step of sealing the opening of the container, an electrolytic solution is filled into the laminate from the opening of the container to impregnate the laminate. The processing means of the process is installed to seal the container opening so that a liquid injection nozzle and an air supply / exhaust nozzle are inserted into the inside of the container from the container opening and a part of them protrudes from the container opening to the outside. A sealing jig, a facility for supplying the electrolyte solution of the storage tank to the liquid injection nozzle, a vacuum pump and a highly dry inert gas supply source for the air supply / exhaust nozzle Selective connection Apparatus for manufacturing an electric double layer capacitor comprising: the order of the facilities, the. And a facility for selectively connecting a vacuum pump and a highly dry inert gas supply source to the electrolyte storage tank. Double layer capacitor manufacturing equipment. The injection nozzle is a connector part that is separably connected to a pipe on the equipment side for supplying the electrolytic solution of the storage tank, and a normally closed valve mechanism that opens its connection port only when connected to the pipe, And the supply / exhaust nozzle includes a connector part detachably connected to a facility-side pipe for selectively connecting the vacuum pump and the inert gas supply source, and a connection port thereof. An apparatus for manufacturing an electric double layer capacitor according to claim 6 or 7, further comprising a normally closed valve mechanism that opens only when connected to the pipe.

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