JP2012074535A - Capacitor and capacitor module using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve the heavy current and high capacity of a capacitor used for a hybrid vehicle, etc.SOLUTION: A capacitor has a structure in which a welded electrode processing part 1a is provided in at least a part of an anode electrode 2 or a cathode electrode 3 exposed on each end surface of an element 1 from which a pair of lead plates 5 and 6 are led out in the same direction, and electrodes which are closely adjacent to each other in a laminated state from the center of the element 1 to the outer periphery are electrically connected to each other, thereby preventing the concentration of current only at the part at which the lead plates 5 and 6 of the electrodes 2 and 3 are connected, enabling the current to be dispersed in the whole electrodes and achieving the heavy current and high capacity by substantially reducing the resistance of the electrodes.

Description

  The present invention relates to a capacitor used for regeneration of various electronic devices and hybrid vehicles, or for storing electric power, and a capacitor module using the same.

  FIG. 9 is a cross-sectional view showing the configuration of this type of conventional capacitor. In FIG. 9, reference numeral 25 denotes an element, and this element 25 has an anode foil 25a and a cathode foil 25b with a separator 25c interposed therebetween. It is comprised by winding by. A plurality of lead lead plates 26 are connected to the anode foil 25a and the cathode foil 25b at a predetermined interval, respectively, and the plurality of lead lead plates 26 are gathered at a predetermined position for each of the same poles. Are drawn out in pairs from one end face of the.

  27 is a cylindrical outer case with a bottom containing the element 25 together with an electrolyte solution (not shown), 28 is a fixing member made of polypropylene resin provided in the outer case 27, and 29 is used to seal the opening of the outer case 27. A phenolic resin sealing plate 30 is a terminal attached to the sealing plate 29, and is electrically connected to the terminal 30 by caulking the pair of lead lead plates 26. (Patent Document 1).

  FIG. 10 is a cross-sectional view showing another configuration of a conventional capacitor. In FIG. 10, reference numeral 31 denotes a capacitor element, and 32a and 32b are a pair of lead lead plates led out from the capacitor element 31. Reference numeral 33 denotes a sealing member in which a rubber 33a and a resin plate 33b are laminated and integrated. A pair of aluminum metal rivets 34a and 34b pass through the sealing member 33, and one end of the pair of metal rivets 34a and 34b. A pair of external connection terminals 35a and 35b are connected to the part, and the pair of lead lead plates 32a and 32b are caulked to the other end part via aluminum metal washers 36a, 36b, 37a and 37b. Are electrically connected.

  The capacitor element 31 and the sealing member 33 thus integrated are impregnated with an electrolytic solution (not shown) in the capacitor element 31, and then a fixing material 38 is put inside and a lateral drawing process is performed in the vicinity of the opening. The sealing member 33 is fixed by being curled in the open end of the metal case 39 (Patent Document 2).

  Further, the lead lead plate 26 shown in FIG. 9 (same as the lead lead plates 32a and 32b shown in FIG. 10) is connected to the aluminum foil which is a current collector constituting the anode foil 25a and the cathode foil 25b. In order to improve the resistance component and reduce the resistance component, the connection portion is formed by partially removing an electrode layer (not shown) formed on the current collector and exposing the aluminum foil (patent document). 3).

  As prior art document information related to the invention of this application, for example, Patent Document 1, Patent Document 2, and Patent Document 3 are known.

JP-A-2-265231 JP 2000-357638 A Japanese Patent Laid-Open No. 8-83738

  However, in the above conventional capacitor, the electrode layer is partially removed to expose the aluminum foil as a current collector, and then a plurality of lead lead plates 26 are connected to the anode foil 25a and the cathode foil 25b, respectively. Although the resistance component is reduced by improving the resistance (Patent Document 3), the electrode leads from the wound element 25 (31) are connected to the anode foil 25a and the cathode foil 25b, respectively. Since it is a thing (patent document 1, patent document 2) of the structure made to perform via the lead board 26 (32a, 32b), there existed a subject that a resistance component was large fundamentally.

  For this reason, it is difficult not only to increase the current and capacity of a single capacitor, but also to increase the current and capacity by making a capacitor module by connecting a plurality of capacitors. Since a large number of capacitors are required for the application, the resistance component becomes too large. As a result, with such a capacitor, it is difficult to connect a plurality of capacitors to produce a capacitor module. I had it.

  The present invention solves such a conventional problem and makes it possible to increase the current and the capacity by reducing the resistance, thereby producing a capacitor module by connecting a plurality of these capacitors, It is an object of the present invention to provide a capacitor and a capacitor module using the same that can cope with an increase in capacity and capacity.

  In order to solve the above-described problems, the present invention provides a method in which a polarizable electrode layer is formed on a current collector made of metal foil, and an anode electrode and a cathode electrode connected with a lead plate are wound with a separator interposed therebetween. An element configured such that only the anode electrode is exposed on one end face, only the cathode electrode is exposed on the other end face, and a pair of lead plates connected to the electrodes are drawn out in the same direction. And a metal case containing the element together with the electrolyte, and a terminal to which the pair of lead plates are connected, fitted into the opening of the metal case, and sealed by processing the vicinity of the opening of the metal case. A sealing plate for stopping, and welding or crushing at least a part of at least one of the anode electrode or the cathode electrode exposed on each end face of the element from the center of the element It is of electrically connected with the structure of the closely spaced electrodes each other in the stacked state toward the circumference.

  As described above, the capacitor according to the present invention is welded or crushed on at least a part of at least one of the anode electrode or the cathode electrode exposed on each end face of the element in which the pair of lead plates are drawn in the same direction. By applying the electrodes, the electrodes that are in close contact with each other in the laminated state from the center of the element to the outer periphery are electrically connected, so that the current does not concentrate only on the portion where the lead plate of the electrode is connected. Since it can be dispersed throughout, the resistance of each electrode can be greatly reduced to increase the current and capacity.

  Further, by producing a capacitor module by connecting a plurality of capacitors, it is possible to easily obtain a large current and large capacity.

(A) The top view which showed the structure of the capacitor by Example 1 of this invention, (b) The front sectional drawing, (c) The bottom view (A) The perspective view from the upper part side which showed the element used for the capacitor, (b) The perspective view from the lower part side, (c) The expansion | deployment perspective view from the upper part side (A) A plan view showing an anode electrode used in the element of the capacitor, (b) a plan view showing a cathode electrode used in the element, and (c) a state before winding of the element. Plan view (A) Current distribution diagram showing the result of simulating the current distribution dispersed and flowing in the electrodes constituting the capacitor element in comparison with the conventional product, (b) Plan view of the electrode of the embodiment used for the simulation. (C) Plan view of the conventional electrode Explanatory drawing which showed the result of having simulated the change of the resistance value by the size of the electrode processing part provided in the element of the capacitor (A) The perspective view from the upper side which showed the other element used for the capacitor, (b) The top view which showed the anode electrode used for the element, (c) The cathode electrode used for the element Plan view showing The top view which showed the other example of the connection state of the electrode and lead board which comprise the element of the capacitor (A) The top view which showed the structure of the capacitor module by Example 2 of this invention, (b) The front view Sectional view showing the structure of a conventional capacitor Sectional drawing which showed the other structure of the conventional capacitor

  Hereinafter, the invention described in the first to ninth aspects of the present invention will be described with reference to Example 1.

  1A to 1C are a plan view, a front sectional view, and a bottom view showing the structure of a capacitor according to a first embodiment of the present invention, and FIGS. 2A to 2C are elements used in the capacitor. 3 is a perspective view from the upper side, a perspective view from the lower side, a developed perspective view from the upper side, and FIGS. 3A to 3C are plan views showing anode electrodes used in the element of the capacitor. FIG. 3 is a plan view showing a cathode electrode used in the element, and a plan view showing a state before the element is wound.

  1 to 3, reference numeral 1 denotes an element. As shown in detail in FIG. 2, the element 1 has a strip-like anode electrode 2 to which an anode lead plate 5 is connected and a strip-like shape to which a cathode lead plate 6 is connected. The anode lead plate 5 and the cathode lead plate 6 are drawn out in the same direction as a pair. Is. Reference numeral 1a denotes an electrode processing portion in which a part of each end face of the element 1 is laser-welded to electrically connect closely contacting electrodes. Details of the electrode processing portion 1a will be described later.

  Further, as shown in detail in FIG. 3, the band-like anode electrode 2 is formed on the surface of a current collector 2a made of a metal foil such as aluminum, except for a current collector exposed portion 2b at one end, and a polarizable electrode layer 2c. In addition, the strip-like cathode electrode 3 is exposed to the current collector at one end on the surface of a current collector 3a made of a metal foil such as aluminum as in the case of the anode electrode 2. The polarizable electrode layer 3c is formed except for the portion 3b.

  Then, as shown in FIG. 3C, the current collector exposed portion 2b provided at one end of each electrode in which the belt-like anode electrode 2 and the belt-like cathode electrode 3 thus configured are arranged in opposite directions. 3b are arranged at both ends, are superposed with their positions shifted, and are wound with a separator 4 interposed therebetween, whereby the current collector exposed portion 2b of the anode electrode 2 and the current collector of the cathode electrode 3 are wound. The body exposed portions 3b are exposed at the opposing end surfaces. That is, only the anode electrode 2 is exposed at one end face of the element 1, and only the cathode electrode 3 is exposed at the other end face.

  An anode lead plate 5 is connected to the anode electrode 2, and the anode lead plate 5 is formed by cutting a metal foil such as aluminum into a strip shape. Is connected to the current collector 2a constituting the anode electrode 2 by ultrasonic welding (Note that this connection is performed by removing the polarizable electrode layer 2c and exposing the current collector 2a. This is preferable in order to reduce the resistance and stabilize the connection strength).

  Similarly to the anode electrode 2, a cathode lead plate 6 is connected to the cathode electrode 3, and the cathode lead plate 6 is formed by cutting a metal foil such as aluminum into a strip shape. The cathode lead plate 6 is connected to the current collector 3a constituting the cathode electrode 3 by ultrasonic welding (in this connection part, the polarizable electrode layer 3c is partially removed to expose the current collector 3a). This is preferable because the connection resistance can be reduced and the connection strength can be stabilized.

  Further, when the cathode lead plate 6 connected to the cathode electrode 3 is overlapped with the anode electrode 2 through the separator 4 as shown in FIG. 3C, the collector exposed portion of the anode electrode 2 is exposed. In order to prevent a short circuit due to contact with 2b, an insulation treatment is applied to the portion of the cathode lead plate 6 connected to the cathode electrode 3 that is in contact with the current collector exposed portion 2b of the cathode lead plate 6. Specifically, it is preferable to apply an insulating resin (not shown) or to apply an insulating tape (not shown).

  The anode electrode 2 (current collector exposed portion 2b) and the cathode electrode 3 (current collector exposed portion 3b) exposed at each end face of the element 1 thus configured are welded (or crushed (sedge). ) May be processed) to provide an electrode processing portion 1a in which electrodes closely connected in a laminated state are electrically connected from the center of the element 1 toward the outer periphery (see FIGS. 2A and 2B). ) It is what you are configuring.

  By providing such an electrode processing portion 1a on both end faces of the element 1, current is supplied only to a portion where the anode lead plate 5 of the anode electrode 2 is connected and a portion where the cathode lead plate 6 of the cathode electrode 3 is connected. Since the current is not concentrated and the current can be dispersed throughout the anode electrode 2 and the cathode electrode 3, the resistance of each electrode (the anode electrode 2 and the cathode electrode 3) is greatly reduced to increase the current. The capacity can be increased, and this effect will be described in more detail with reference to FIGS.

  4 (a) to 4 (c) are current distribution diagrams showing the result of simulating the current distribution dispersed and flowing in the electrodes constituting the capacitor element according to the present embodiment, and a current distribution diagram used for this. FIG. 4B is a plan view of the electrode of the embodiment and a plan view of the electrode of the conventional product, and the invention product shown in FIG. 4B shows the developed anode electrode 2 as an example, and the anode lead plate 5 is connected to the anode electrode 2. In addition, a plurality of welding marks 2d constituting the electrode processing portion 1a are formed on the surface side of the current collector exposed portion 2b. On the other hand, the conventional product shown in FIG. 4C has a configuration in which only the anode lead plate 26 is connected to the anode foil.

  In FIG. 4A, the horizontal axis represents the length of the electrode foil, the vertical axis represents the magnitude of the current flowing through the electrode foil, and the magnitude of the current flowing at a plurality of positions in the length direction of the electrode foil. Is what we asked for. As is apparent from this current distribution diagram, in the conventional product, the largest current flows concentratedly on the anode electrode at the portion where the anode lead plate 26 is connected, and the current flowing toward this point approaches zero. On the other hand, in the invention, the anode lead plate 5 is connected because the electrode processing portion 1a (welding mark 2d) in which a part of the end face of the element 1 is welded and the electrodes are electrically connected is provided. In other words, the largest current does not concentrate and flow in the anode electrode 2 in this portion, but a small current distributed over the entire anode electrode 2 flows.

  FIG. 5 is an explanatory view showing the result of simulating the change in resistance value due to the size of the electrode processing portion 1a (the number of welding marks 2d), in which the width W of the polarizable electrode layer 2c is 117 mm. As is clear from this result, the resistance value of the conventional product without the electrode processing portion 1a is 3.02 mΩ, whereas the resistance value of the present invention with the electrode processing portion 1a is 0.54 to 1.04 mΩ. It can be seen that the resistance value decreases as the size of the electrode processing portion 1a increases, but low resistance is realized by providing the electrode processing portion 1a having a predetermined size or more. Is something that can be done.

  Therefore, according to the capacitor of the present invention, it is possible to realize a reduction in resistance by providing the electrode processing portions 1a on both end faces of the element 1, thereby increasing current and capacity with a simple configuration. There is an exceptional effect that can be achieved.

  7 is an aluminum product containing the element 1 together with an electrolytic solution not shown (in this embodiment, an ethyltrimethylammonium tetrafluoroborate salt dissolved in γ-butyrolactone or propylene carbonate was used as the electrolytic solution). A bottomed cylindrical metal case, 7a, is a horizontal drawing portion provided in an annular shape on the outer peripheral surface in the vicinity of the opening of the metal case.

  1 illustrates an example in which the element 1 is directly inserted into the metal case 7. In this case, the current collector exposed portion of the cathode electrode 3 exposed on one end face of the element 1 is described. 3b may contact the inner bottom surface of the metal case 7 and current may flow through the metal case 7. In order to prevent such a phenomenon, the inner bottom surface of the metal case 7, the element 1 and It is preferable to dispose an insulating member such as insulating paper between them.

  8 is a sealing plate made of phenol resin or the like, 9 is a pair of terminals implanted in the sealing plate 8, and a female screw is provided on one end side of the terminal 9 (portion located on the surface side of the sealing plate 8). The anode lead plate 5 and the cathode lead plate 6 led out from the element 1 are respectively crimped to the other end side (the portion located in the metal case 7 on the back side of the sealing plate 8). Are connected to each other.

  Reference numeral 10 denotes a sealing rubber. The sealing rubber 10 is formed in a ring shape and disposed on the peripheral edge of the upper surface of the sealing plate 8, and is compressed by curling the opening end of the metal case 7 (curling processing portion 7b). Thus, the sealing plate 8 is urged so that the opening of the metal case 7 is sealed.

  11 is a rubber plug that is press-fitted into a through hole provided in the sealing plate 8. The rubber plug 11 allows a part of the gas generated inside the capacitor to escape to the outside, and the gas cannot be completely released to the outside. When it becomes, it is constituted so that it can be released by the gas pressure inside the capacitor. Accordingly, in this embodiment, isobutylene isoprene rubber (IIR) is used as the material of the rubber plug 11, and this IIR does not permeate the electrolytic solution, but can release the gas generated inside the capacitor to the outside. However, the present invention is not limited to this, and ethylene propylene terpolymer (EPT) having the same characteristics, isobutylene isoprene rubber (IIR) and ethylene propylene terpolymer (EPT) A mixed product may be used.

  The capacitor according to this embodiment configured as described above is welded to the anode electrode 2 and the cathode electrode 3 exposed on each end face of the element 1 in which the pair of lead plates 5 and 6 are drawn in the same direction, The anode lead plate 5 of the anode electrode 2 is connected by the configuration in which the anode electrode 2 that is in close contact with the laminated state from the center of the element 1 or the electrode processing portion 1a that electrically connects the cathode electrodes 3 is provided. Current is not concentrated only on the portion where the cathode lead plate 6 of the cathode electrode 3 is connected, and the current can be distributed to the entire anode electrode 2 and cathode electrode 3. This brings about a special effect that the resistance of each electrode (the anode electrode 2 and the cathode electrode 3) can be greatly reduced to increase the current and capacity.

  Further, the capacitor according to the present embodiment is of a type in which the electrodes are drawn out from the element 1 by using the anode lead plate 5 and the cathode lead plate 6, so that the electrodes are drawn out using lead wires. Although it is easy to reduce the resistance compared to the above, it is possible to further reduce the resistance by using an element having a structure as shown in FIG.

  6 (a) to 6 (c) are perspective views from the upper side showing the element having reduced resistance, a plan view showing an anode electrode used in the element, and a cathode electrode used in the element. In FIG. 6, 12 is an element, 12a is an electrode processing portion provided on each end face of this element 12, 13 is an anode electrode, 14 is a cathode electrode, 15 is an anode lead plate, and 16 is a cathode. The lead plate is shown.

  As shown in FIGS. 6B and 6C, a plurality of anode lead plates 15 and a cathode lead plate 16 are connected to the anode electrode 13 and the cathode electrode 14 at predetermined intervals, respectively. The element 12 as shown in FIG. 6 (a) is formed by winding with a separator interposed between the plurality of anode lead plates 15 and the cathode lead plates 16 being pulled out from predetermined positions. It is comprised as follows.

  The element 12 configured as described above can further reduce the resistance by dispersing current by using a configuration in which each electrode is drawn out using a plurality of lead plates.

  7 is a plan view showing another example of the connection state of the anode electrode 2 and the anode lead plate 5 constituting the element 1 of the capacitor. In FIG. The structure connected only to the collector exposed portion 2b is shown. By doing so, the polarizable electrode of the portion to which the anode lead plate 5 is connected as compared with that described with reference to FIG. Since the operation of removing a part of the layer 2c is not necessary, an effect that productivity can be improved is obtained.

  Further, isobutylene isoprene rubber (IIR) is used as the material of the rubber plug 11, and in addition to the structure in which a part of the gas generated inside the capacitor is released to the outside by the rubber plug 11 made of IIR, ethyl trimethyl is used as the electrolyte. Due to the configuration using ammonium tetrafluoroborate salt dissolved in γ-butyrolactone or propylene carbonate, this electrolytic solution has the feature that the amount of gas generated can be reduced and the deterioration can be suppressed. Therefore, the above-described effects can be further enhanced to obtain a synergistic effect. Therefore, it can be said that the combination of the electrolytic solution and the rubber plug 11 is optimal for the capacitor according to the present invention.

  However, the rubber plug 11 is not an indispensable part, and by providing a pressure valve (also called a safety valve or an explosion-proof valve) on the bottom surface of the metal case 7, gas generated inside the capacitor may be released to the outside. Is possible.

  In this embodiment, the anode electrode 2 exposed on each end face of the element 1 and the cathode electrode 3 are welded, so that the anode electrode is in close contact with the laminated state from the center of the element 1 toward the outer periphery. 2, the example in which the electrode processing part 1a in which the cathode electrodes 3 are electrically connected is provided has been described. However, the present invention is not limited to this, and the electrode processing part 1a may be the anode electrode 2 or the cathode electrode. The effect of reducing the resistance can be obtained by providing only one of the three, and the means for providing the electrode processing portion 1a can be applied by crushing (sedge) processing in addition to welding.

  In the present embodiment, an electric double layer capacitor has been described as an example of the capacitor according to the present invention. However, the present invention is not limited to this, and activated carbon on a current collector made of aluminum foil. An element is formed using a positive electrode in which a polarizable electrode layer mainly composed of carbon is formed, and a negative electrode in which a polarizable electrode layer mainly composed of a carbon material is formed on a current collector made of copper foil, and includes lithium ions. A capacitor called an electrochemical capacitor having a configuration using an organic electrolytic solution may be used, and further an aluminum electrolytic capacitor may be used. Even in this case, the same effect can be obtained.

  Further, in this embodiment, as an example of the capacitor according to the present invention, a capacitor having a configuration as shown in FIG. 1, that is, a screw terminal type using a sealing plate 8 in which a terminal 9 having a female screw is implanted, However, the present invention is not limited to this, and the rubber 33a and the resin plate 33b are laminated and integrated as in the capacitor described in the background art using FIG. A self-supporting substrate using a sealing member 33 in which a pair of metal rivets 34a and 34b are passed through the sealed sealing member 33 and a pair of external connection terminals 35a and 35b are connected to one end of the pair of metal rivets 34a and 34b. A capacitor called a type may be used, and even in this case, the same effect can be obtained.

  The second embodiment of the present invention, in particular, the invention described in claim 10 will be described below.

  In this embodiment, a capacitor module is formed by integrating a plurality of capacitors described in Embodiment 1 with reference to FIGS. 1 to 7 in parallel, and the configuration of the capacitor used in this capacitor module is as follows. Since they are the same as those of the first embodiment, the same portions are denoted by the same reference numerals and detailed description thereof is omitted, and only different portions will be described in detail with reference to the drawings.

  FIGS. 8A and 8B are a plan view and a front view showing the configuration of the capacitor module according to the second embodiment of the present invention. In FIG. 8, reference numeral 17 denotes a capacitor. Although an example in which six 17 are connected in parallel is shown, the present invention is not limited to this, and any number may be used as long as two or more are connected in parallel.

  Reference numeral 18 denotes a printed wiring board. A wiring pattern (not shown) is provided on the printed wiring board 18. The pair of terminals 9 provided on the capacitor 17 are brought into contact with the printed wiring board 18, and the pair of terminals are connected. 6 are connected in parallel by screwing bolts 19 into the female screws respectively provided in 9, and in this state, the case 20 (not shown in FIG. 8B) is omitted. Thus, the capacitor module 21 according to the present embodiment is configured.

  The capacitor module according to the present embodiment configured as described above exhibits the effects obtained by the capacitor 17 according to the first embodiment to the maximum, and the capacitor module is configured by using such a capacitor 17 to obtain a large current. It is possible to easily achieve a large capacity and a large capacity.

  In the present embodiment, the example in which the capacitor module 21 is configured by connecting six capacitors 17 in parallel has been described. However, the present invention is not limited to this, and two or more capacitors are used. It is needless to say that the capacitor module can be configured by connecting 17 in series (corresponding by changing a wiring pattern (not shown) provided on the printed wiring board 18), or by combining parallel connection and series connection.

  In addition, a plurality of capacitor modules 21 configured in this manner can be integrated by connecting them in series (or connected in parallel), so that a capacitor module can be manufactured. There is a special effect that the capacity can be easily increased.

  The capacitor according to the present invention and the capacitor module using the capacitor have an effect that a large current and a large capacity can be achieved, and are particularly useful in the field of automobiles including hybrid vehicles.

DESCRIPTION OF SYMBOLS 1, 12 Element 1a, 12a Electrode processing part 2, 13 Anode electrode 2a, 3a Current collector 2b, 3b Current collector exposed part 2c, 3c Polarized electrode layer 3, 14 Cathode electrode 4 Separator 5, 15 Anode lead plate 6 , 16 Cathode lead plate 7 Metal case 7a Horizontal drawing portion 7b Curling portion 8 Sealing plate 9 Terminal 10 Sealing rubber 11 Rubber plug 17 Capacitor 18 Printed wiring board 19 Bolt 20 Case 21 Capacitor module

Claims (11)

A polarizable electrode layer is formed on a current collector made of a metal foil, and an anode electrode and a cathode electrode connected with a lead plate are wound with a separator interposed therebetween, whereby an anode is formed on one end face. An element configured such that only the electrode is exposed, only the cathode electrode is exposed on the other end face, and each lead plate connected to the anode electrode and the cathode electrode is drawn out in a pair in the same direction; A bottomed cylindrical metal case containing this element together with the electrolyte and a terminal to which the pair of lead plates are connected are fitted into the opening of the metal case to process the vicinity of the opening of the metal case. By performing welding processing or crushing (sedge) processing on at least a part of at least one of the anode electrode or the cathode electrode exposed on each end face of the element Capacitor electrically connecting the closely spaced electrodes each other in the stacked state toward the outer periphery from the center of the element. The structure of the element is such that an anode electrode having a polarizable electrode layer formed on a current collector made of aluminum foil except for one end, and a cathode electrode similarly configured are arranged in opposite directions to each other. Current collector exposed portions are arranged at both ends, overlapped with their positions shifted, and wound with a separator interposed therebetween, so that the current collector exposed portions of the anode electrode and the cathode electrode face each other. The capacitor according to claim 1, wherein the capacitor is configured to be exposed at an end face. The capacitor according to claim 2, wherein a part of the lead plate connected to one electrode constituting the element is in contact with a current collector exposed portion of the other electrode. The element according to claim 1, wherein a plurality of lead plates are connected to the anode electrode and the cathode electrode at predetermined intervals, respectively, and the plurality of lead plates are collectively pulled out from a predetermined position for each same pole. Capacitor. The capacitor according to claim 1, wherein a through hole is provided in the sealing plate, and a rubber plug is fitted into the through hole. The capacitor according to claim 1, wherein a rubber sheet is bonded to the surface side of the sealing plate. 7. The rubber plug or rubber sheet according to claim 5 or 6, wherein the rubber plug or the rubber sheet comprises any one of isobutylene isoprene rubber (IIR), ethylene propylene terpolymer (EPT), and a mixture of isobutylene isoprene rubber (IIR) and ethylene propylene terpolymer (EPT). The capacitor described. The capacitor according to claim 1, wherein an electrolytic solution obtained by dissolving ethyltrimethylammonium tetrafluoroborate salt in γ-butyrolactone or propylene carbonate is used. The capacitor according to claim 1, wherein an insulating member is disposed between the inner bottom surface of the metal case and the element. A capacitor module integrated by connecting a plurality of capacitors according to any one of claims 1 to 9 in parallel or in series. A capacitor module integrated by connecting a plurality of capacitor modules according to claim 10 in series or in parallel.

Images