CN112514015B - Capacitor and method for manufacturing capacitor - Google Patents
Capacitor and method for manufacturing capacitor Download PDFInfo
- Publication number
- CN112514015B CN112514015B CN201980049921.8A CN201980049921A CN112514015B CN 112514015 B CN112514015 B CN 112514015B CN 201980049921 A CN201980049921 A CN 201980049921A CN 112514015 B CN112514015 B CN 112514015B
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- terminal
- terminal portion
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- connection terminal
- portions
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- 239000003990 capacitor Substances 0.000 title claims abstract description 113
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 238000000034 method Methods 0.000 title claims description 17
- 229920005989 resin Polymers 0.000 claims description 23
- 239000011347 resin Substances 0.000 claims description 23
- 239000010408 film Substances 0.000 claims description 20
- 238000005452 bending Methods 0.000 claims description 18
- 239000011104 metalized film Substances 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000005219 brazing Methods 0.000 claims description 5
- 238000007740 vapor deposition Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 15
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 7
- 238000000151 deposition Methods 0.000 description 5
- 239000010409 thin film Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000007730 finishing process Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003685 thermal hair damage Effects 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- -1 acryl Chemical group 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 210000002105 tongue Anatomy 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/006—Apparatus or processes for applying terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The capacitor includes a capacitor element and a terminal member connected to an electrode of the capacitor element. The terminal member includes a connection terminal portion provided at an end portion of the terminal member and connectable to an external terminal. The connection terminal portion includes a first terminal portion extending from an end of the terminal member and a second terminal portion overlapping the first terminal portion.
Description
Technical Field
The present disclosure relates to capacitors and methods of manufacturing capacitors.
Background
Conventionally, the following capacitors are known: the capacitor element to which one end of the bus bar is connected is housed in a case, and an external connection terminal provided at the other end of the bus bar is led out from an opening of the case (see, for example, patent document 1). The external connection terminal is provided to extend from an end of the bus bar, and is connected to an external terminal provided to an external device.
[ Prior Art literature ]
[ patent literature ]
Patent document 1: japanese patent laid-open No. 2009-252935
Disclosure of Invention
A capacitor according to a first aspect of the present disclosure includes a capacitor element and a terminal member connected to an electrode of the capacitor element. The terminal member includes a connection terminal portion provided at an end portion of the terminal member and connectable to an external terminal. The connection terminal portion includes a first terminal portion extending from the end portion of the terminal member and a second terminal portion overlapping the first terminal portion.
A method for manufacturing a capacitor according to a second aspect of the present disclosure includes: a step of manufacturing a terminal member; and a step of connecting the terminal member to an electrode of the capacitor element. The terminal member includes a connection terminal portion provided at an end portion of the terminal member and connectable to an external terminal. The connection terminal portion includes a first terminal portion extending from the end portion and a second terminal portion overlapping the first terminal portion. The process of manufacturing the terminal member includes the steps of: a step of folding the first terminal portion and the second terminal portion in an expanded state by bending a boundary between the first terminal portion and the second terminal portion; and pressing the first terminal portion and the second terminal portion that are stacked in a thickness direction of the first terminal portion and the second terminal portion.
According to the present disclosure, a capacitor in which thermal damage to a capacitor element is difficult to occur can be provided.
The effects and meaning of the present disclosure will be more apparent from the following description of the embodiments. The embodiments described below are merely examples of implementation of the present disclosure, and the present disclosure is not limited to the contents described in the following embodiments.
Drawings
Fig. 1 is a perspective view of a thin film capacitor according to an embodiment.
Fig. 2 is a perspective view of the capacitor element unit and the case before the capacitor element unit is accommodated in the case according to the embodiment.
Fig. 3A is a perspective view of a first bus bar according to an embodiment.
Fig. 3B is a perspective view of the second bus bar according to the embodiment.
Fig. 4A is a perspective view of a main portion of the first bus bar showing the periphery of the first rear connection terminal portion according to the embodiment.
Fig. 4B is a perspective view of a main portion of the second bus bar showing the periphery of the second rear connection terminal portion according to the embodiment.
Fig. 5A is a cross-sectional view of a main portion of the film capacitor showing the periphery of the first rear connection terminal portion of the first bus bar according to the embodiment.
Fig. 5B is a cross-sectional view of a main portion of the film capacitor showing the periphery of the second rear connection terminal portion of the second bus bar according to the embodiment.
Fig. 6 is a diagram showing a flow of the bus bar manufacturing process according to the embodiment.
Fig. 7 is a diagram for explaining a connecting terminal portion bending process according to the embodiment.
Fig. 8A is a diagram for explaining a connection terminal portion pressing process according to the embodiment.
Fig. 8B is a diagram for explaining a connection terminal portion finishing process according to the embodiment.
Fig. 9A is a diagram for explaining the first rear connection terminal portion and the second rear connection terminal portion according to the modification.
Fig. 9B is a diagram for explaining the first rear connection terminal portion and the second rear connection terminal portion according to the modification.
Fig. 10A is a diagram for explaining the first rear connection terminal portion and the second rear connection terminal portion according to the modification.
Fig. 10B is a diagram for explaining the first rear connection terminal portion and the second rear connection terminal portion according to the modification.
Fig. 10C is a diagram for explaining the first rear connection terminal portion and the second rear connection terminal portion according to the modification.
Fig. 11A is a diagram for explaining the first rear connection terminal portion and the second rear connection terminal portion according to the modification.
Fig. 11B is a diagram for explaining the first rear connection terminal portion and the second rear connection terminal portion according to the modification.
Detailed Description
Before explaining the embodiment, first, a problem in the related art will be briefly described. The external connection terminal is liable to be smaller in width in a direction orthogonal to the flow of current than the main body portion on the capacitor element side in the bus bar, and is liable to be smaller in cross-sectional area in the width direction even if the thickness is the same as that of the main body portion, and therefore the resistance is liable to be larger. Therefore, when the current flowing from the external device to the capacitor increases, the external connection terminal is likely to generate heat and become high in temperature. When the external connection terminal is at a high temperature, if heat is transmitted to the capacitor element via the bus bar, there is a concern that the capacitor element may be thermally damaged.
In recent years, with the popularization of electric vehicles, the use of capacitors for electric vehicles has been started. For example, a capacitor can be mounted on an inverter unit for driving a motor or the like. The inverter unit is supplied with power from the power supply device, and at this time, an external terminal connected to the power supply device is connected to a terminal for external connection of the capacitor. In such a case, in particular, a large current easily flows from the power supply device to the capacitor, and heat is easily generated at the external connection terminal due to the flow of the large current. This causes thermal damage to the capacitor element.
In view of such problems, the present disclosure provides a capacitor in which thermal damage to a capacitor element is less likely to occur.
Hereinafter, a thin film capacitor 1 as an embodiment of a capacitor of the present disclosure will be described with reference to the drawings. For convenience, the front-back, left-right, and up-down directions are appropriately indicated for each drawing. The direction shown in the drawing is merely a relative direction of the film capacitor 1, and is not an absolute direction.
In the present embodiment, the thin film capacitor 1 corresponds to a "capacitor" described in the claims. The first end surface electrode 410 and the second end surface electrode 420 correspond to "electrodes" described in the claims. Further, the first bus bar 500 and the second bus bar 600 correspond to a "terminal member" described in the claims. The first rear connection terminal 530 and the second rear connection terminal 630 correspond to the "connection terminal" described in the claims.
However, the above description is only for the purpose of associating the structure of the claims with the structure of the embodiments, and the disclosure described in the claims is not limited to the structure of the embodiments by the association.
Fig. 1 is a perspective view of a film capacitor 1.
Referring to fig. 1, film capacitor 1 includes capacitor element unit 100, case 200, and filling resin 300. The capacitor element unit 100 is housed in the case 200, and the filling resin 300 is filled in the case 200. The filler resin 300 is a thermosetting resin, for example, an epoxy resin. Most of the capacitor element unit 100 buried in the filling resin 300 is protected from moisture and impact by the case 200 and the filling resin 300.
Fig. 2 is a perspective view of capacitor element unit 100 and case 200 before capacitor element unit 100 is accommodated in case 200. Fig. 3A is a perspective view of the first bus bar 500, and fig. 3B is a perspective view of the second bus bar 600.
Referring to fig. 2, 3A and 3B, the capacitor element unit 100 includes 6 capacitor elements 400, a first bus bar 500, a second bus bar 600, a first insulating sheet 700 and a second insulating sheet 800.
The capacitor element 400 is formed by stacking 2 metallized films obtained by depositing aluminum on a dielectric film, winding or laminating the stacked metallized films, and pressing the stacked metallized films into a flat shape. In capacitor element 400, first end surface electrode 410 is formed by spraying a metal such as zinc on one end surface, and second end surface electrode 420 is formed by spraying the same metal such as zinc on the other end surface. The 6 capacitor elements 400 are arranged in 2 front-rear columns and 3 columns in a state where both end surfaces face in the up-down direction, and in this state, the first bus bar 500 and the second bus bar 600 are connected to the first end surface electrode 410 and the second end surface electrode 420 of these capacitor elements 400, respectively.
The capacitor element 400 of the present embodiment is formed by depositing a metallized film of aluminum on the dielectric film, but may be formed by depositing a metallized film of other metal such as zinc or magnesium. Alternatively, the capacitor element 400 may be formed by vapor deposition of a metallized film of a plurality of these metals, or may be formed by vapor deposition of a metallized film of an alloy of these metals.
The first bus bar 500 is formed by appropriately cutting and bending a conductive material such as a copper plate, and has a structure in which a first main body portion 510 and 3 first front connection terminal portions 520 and first rear connection terminal portions 530 are integrated.
The first body portion 510 includes a terminal face portion 510a and a front face portion 510b. The terminal surface portion 510a has a substantially rectangular shape with a right end vicinity portion of the rear end portion slightly projecting rearward, and covers the first terminal surface electrodes 410 of the 6 capacitor elements 400 from above. A first electrode terminal 512 is formed on the front edge of the terminal surface 510a at 6 openings 511 arranged in the left-right direction. In addition, 4 first electrode terminals 512 are formed at the rear end portion and 3 first electrode terminals 512 are formed at the right end portion of the terminal face portion 510 a. The 2 first electrode terminals 512 are in contact with the first end surface electrode 410 of each capacitor element 400, and these first electrode terminals 512 are joined to the first end surface electrode 410 by a joining method such as soldering. Thereby, the first bus bar 500 is electrically connected to the first terminal electrodes 410 of the 6 capacitor elements 400. The front surface portion 510b has an elongated substantially rectangular shape, and stands up from the front edge portion of the terminal face portion 510 a. The upper end portion of the front surface portion 510b is curved to protrude forward.
In the first body 510, 2 circular flow holes 513 are formed in the terminal surface 510 a. Below 2 flow holes 513, no capacitor element 400 is present. In the first body 510, an elliptical flow hole 514 is formed across the terminal surface 510a and the front surface 510 b. The 3 first front connection terminal portions 520 are provided at the upper end portion of the front surface portion 510b so as to be arranged at equal intervals in the left-right direction. The first front connection terminal portion 520 has a hook shape that extends forward while being bent after extending upward. In the first front connection terminal portion 520, a circular through hole 522 is formed at a side of the front end portion of the bent portion 521.
The first rear connection terminal portion 530 is provided at a rear end portion of the terminal face portion 510a that is a rear end portion of the first bus bar 500. The first rear connection terminal portion 530 has a hook shape extending rearward by being bent after extending upward. In the first rear connection terminal portion 530, a circular through hole 532 is formed at a side of the front end portion of the bent portion 531. The detailed structure of the first rear connection terminal portion 530 will be described later.
The second bus bar 600 is formed by appropriately cutting and bending a conductive material such as a copper plate, and has a structure in which the second main body portion 610, the 3 second front connection terminal portions 620, and the second rear connection terminal portions 630 are integrated.
The second body portion 610 includes a terminal face portion 610a, a front face portion 610b, and a rear face portion 610c. The terminal surface portion 610a has a substantially rectangular shape, and covers the second end surface electrodes 420 of the 6 capacitor elements 400 from below. In the terminal surface portion 610a, a total of 12 openings 611 of 2 front and rear sides and 6 left and right sides are formed, and a second electrode terminal 612 is formed at the front edge of each opening 611. The 2 second electrode terminals 612 are in contact with the second end surface electrodes 420 of the respective capacitor elements 400, and these second electrode terminals 612 are joined to the second end surface electrodes 420 by a joining method such as soldering. Thereby, the second bus bar 600 is electrically connected to the second end surface electrodes 420 of the 6 capacitor elements 400. The left side portion of the front surface portion 610b has a rectangular shape with a high height, and the right side portion has a rectangular shape with a low height, and stands up from the front edge portion of the terminal face portion 610 a. The upper end portion of the left side portion of the front surface portion 610b is bent to protrude forward. The rear surface portion 610c has a rectangular shape, and stands up from the rear edge portion of the terminal face portion 610 a.
In the second body 610, 2 circular flow holes 613 are formed in the terminal surface 610 a. There are no capacitor elements 400 above 2 flow holes 613. In the second body 610, 2 oval flow holes 614 are formed across the terminal surface 610a and the front surface 610 b.
In fig. 3B, the front 6 openings 611, the second electrode terminal 612, and the left flow hole 613 are hidden in the front surface 610B.
The 3 second front connection terminal portions 620 are provided at the upper end portion of the left side portion of the front surface portion 610b in such a manner as to be arranged at equal intervals in the left-right direction. The second front connection terminal portion 620 has a hook shape that extends forward while being bent after extending upward. In the second front connection terminal portion 620, a circular through hole 622 is formed at a side of the front end portion of the curved portion 621.
The second rear connection terminal portion 630 is provided at an upper end portion of the rear surface portion 610c that is a rear-side end portion of the second bus bar 600. The second rear connection terminal portion 630 has a hook shape extending rearward by being bent after extending upward. In the second rear connection terminal portion 630, a circular through hole 632 is formed at a side of the front end portion of the bent portion 631. The detailed structure of the second rear connection terminal portion 630 will be described later.
On the front side of the capacitor element unit 100, 3 first front connection terminal portions 520 and 3 second front connection terminal portions 620 are alternately arranged in the left-right direction. Further, on the rear side of the capacitor element unit 100, the first rear connection terminal portion 530 and the second rear connection terminal portion 630 are arranged in the left-right direction.
The first insulating sheet 700 is disposed between the front surface portion 510b of the first bus bar 500 and the front surface portion 610b of the second bus bar 600. Further, a second insulating sheet 800 is disposed between the second rear connection terminal portion 630 of the second bus bar 600 and the capacitor element 400. The first insulating sheet 700 and the second insulating sheet 800 are formed of a resin material having electrical insulation such as insulating paper, acryl, or silicon. The insulation distance between the first bus bar 500 and the second bus bar 600 is ensured by the first insulation sheet 700, and the insulation distance between the second rear connection terminal portion 630 of the second bus bar 600 and the first terminal electrode 410 of the capacitor element 400 is ensured by the second insulation sheet 800.
The case 200 is made of resin, for example, polyphenylene sulfide (PPS) which is a thermoplastic resin. The case 200 is formed in a substantially rectangular parallelepiped box shape, and has a bottom wall 201, a front side wall 202, a rear side wall 203, a left side wall 204, and a right side wall 205, which are raised from the bottom wall 201, and an upper surface thereof is opened.
Mounting tabs 210 are provided on the upper portions of the left and right side walls 204, 205. The mounting tabs 210 have the same width as the left side wall 204 and the right side wall 205. The front side wall 202 and the rear side wall 203 extend to the front ends of the left and right mounting tabs 210. The insertion hole 211 is formed in the mounting tongue 210. A metal collar 212 is fitted into the insertion hole 211 to improve the strength of the hole. A mounting sleeve 220 extending downward is formed on the back side of the center portion of the left and right mounting tongues 210. A nut (not shown) is embedded in the mounting sleeve 220. It should be noted that only the right mounting sleeve 220 is depicted in fig. 2.
A mounting tab 230 is formed at an upper portion near the right end of the front side wall 202. Insertion holes 231 are formed in the respective mounting tabs 230. A metal collar 232 is fitted into the insertion hole 231 to improve the strength of the hole. In addition, at the lower portion of the front side wall 202, 4 mounting sleeves 240 are formed in such a manner as to be aligned in the left-right direction. A nut 241 is embedded in the mounting sleeve 240.
These mounting tabs 210, 230 and mounting sleeves 220, 240 are used when fixing the film capacitor 1 to the installation portion of an external device such as a converter unit.
The capacitor element unit 100 is housed in the case 200, and the melted filling resin 300 is injected into the case 200. At this time, the filling resin 300 passes through the flow holes 513 and 514 of the first bus bar 500 and the flow holes 613 and 614 of the second bus bar 600, whereby the filling resin 300 easily spreads among the 6 capacitor elements 400. The filling resin 300 is filled in the case 200 to the vicinity of the opening 200a, and if the injection of the filling resin 300 is completed, the case 200 is heated. Thereby, the filling resin 300 in the case 200 is cured.
Thus, as in fig. 1, the thin film capacitor 1 is completed. The 3 first front connection terminal portions 520, the 3 second front connection terminal portions 620, the first rear connection terminal portions 530, and the second rear connection terminal portions 630 are exposed from the filling resin 300 filled in the case 200.
Next, a detailed structure of the first rear connection terminal portion 530 of the first bus bar 500 and the second rear connection terminal portion 630 of the second bus bar 600 will be described.
Fig. 4A is a perspective view showing a main portion of the first bus bar 500 at the periphery of the first rear connection terminal portion 530, and fig. 4B is a perspective view showing a main portion of the second bus bar 600 at the periphery of the second rear connection terminal portion 630. Fig. 5A is a cross-sectional view showing a main part of the film capacitor 1 around the first rear connection terminal portion 530 of the first bus bar 500, and fig. 5B is a cross-sectional view showing a main part of the film capacitor 1 around the second rear connection terminal portion 630 of the second bus bar 600.
The first rear connection terminal portion 530 includes a hook-shaped first terminal portion 530a extending from the rear end portion of the first body portion 510, and a hook-shaped second terminal portion 530b folded back from the front end of the first terminal portion 530a to overlap the first terminal portion 530 a. Similarly, the second rear connection terminal portion 630 includes a hook-shaped first terminal portion 630a extending from an upper end portion of the rear surface portion 610c of the second main body portion 610, and a hook-shaped second terminal portion 630b folded back from a front end of the first terminal portion 630a to overlap the first terminal portion 630 a.
The first terminal portions 530a, 630a and the second terminal portions 530b, 630b are formed of the same material (copper plate), and the thicknesses of the portions overlapping each other, that is, the thicknesses of the second terminal portions 530b, 630b are the same as the thicknesses of the portions overlapping the second terminal portions 530b, 630b in the first terminal portions 530a, 630 a. When the first bus bar 500 and the second bus bar 600 are manufactured in the bus bar manufacturing process described later, the portions of the second terminal portions 530b and 630b and the first terminal portions 530a and 630a where the second terminal portions 530b and 630b overlap are flattened by pressing. Therefore, the thickness of the portion of the first terminal portions 530a, 630a where the second terminal portions 530b, 630b overlap is smaller than the thickness of the portion of the first terminal portions 530a, 630a where the second terminal portions 530b, 630b do not overlap.
Thus, the first rear connection terminal portion 530 is configured by the first terminal portion 530a and the second terminal portion 530b overlapped with the first terminal portion 530a, and thus has a thickness (approximately 2 times) larger than that of the first body portion 510. Similarly, the second rear connection terminal portion 630 is configured by the first terminal portion 630a and the second terminal portion 630b overlapped with the first terminal portion 630a, and thus has a thickness (approximately 2 times) larger than that of the second main body portion 610.
The bent portion 531 of the first rear connection terminal portion 530 is included in a portion where the first terminal portion 530a and the second terminal portion 530b overlap each other. The first terminal portion 530a and the second terminal portion 530b are joined by a rivet 533 at a portion opposite to the folded-back portion (the front end portion of the first rear connection terminal portion 530) of the second terminal portion 530b than the bent portion 531. Holes 534a, 534b through which the rivets 533 pass are formed in the first terminal portion 530a and the second terminal portion 530 b. Similarly, the bent portion 631 of the second rear connection terminal portion 630 is included in a portion where the first terminal portion 630a and the second terminal portion 630b overlap each other. Further, the first terminal portion 630a and the second terminal portion 630b are joined by a rivet 633 at a portion on the opposite side of the folded-back portion (the front end portion of the second rear connection terminal portion 630) of the second terminal portion 630b than the bent portion 631. Holes 634a, 634b through which the rivet 633 passes are formed in the first terminal portion 630a and the second terminal portion 630 b.
The through hole 532 of the first rear connection terminal portion 530 is composed of a first hole 532a formed in the first terminal portion 530a and a second hole 532b formed in the second terminal portion 530b and mated with the first hole 532 a. The diameter of the first hole 532a is set to be the same as the diameter of the second hole 532 b. Similarly, the through hole 632 of the second rear connection terminal portion 630 is composed of a first hole 632a formed in the first terminal portion 630a, and a second hole 632b formed in the second terminal portion 630b and matching the first hole 632 a. The diameter of the first hole 632a is set to be the same as the diameter of the second hole 632 b.
The left and right corners 535, 635 of the front end portions of the first rear connection terminal portion 530 and the second rear connection terminal portion 630 are rounded by R-working. Instead of R-machining, chamfering (C-face cutting) may be performed on the left and right corners.
As shown in fig. 5A, in the first rear connection terminal portion 530, an end portion on the opposite side to the front end side of the first rear connection terminal portion 530 in a portion where the first terminal portion 530a and the second terminal portion 530b overlap each other is buried in the filling resin 300. Similarly, as shown in fig. 5B, in the second rear connection terminal portion 630, an end portion on the opposite side to the front end side of the second rear connection terminal portion 630 in a portion where the first terminal portion 630a and the second terminal portion 630B overlap each other is buried in the filling resin 300.
Next, a method of manufacturing the first bus bar 500 and the second bus bar 600 will be described.
Fig. 6 is a diagram showing a flow of the bus bar manufacturing process. Fig. 7 is a diagram for explaining a step of bending the connection terminal portion. Fig. 8A is a diagram for explaining the connection terminal portion pressing process, and fig. 8B is a diagram for explaining the connection terminal portion finishing process.
As shown in fig. 6, the bus bar manufacturing process for manufacturing the first bus bar 500 and the second bus bar 600 includes a die-cutting process, a connecting terminal portion bending process, a connecting terminal portion pressing process, a connecting terminal portion finishing process, and an overall bending process.
Hereinafter, each process of the bus bar manufacturing process will be described with reference to the first bus bar 500 as an example, and the same applies to the second bus bar 600.
First, a die-cutting step (S1) is performed. In the die-cutting step, a cutting die having the shape of the first bus bar 500 is used to cut out () the plate material (copper plate) to obtain the first bus bar 500 in the expanded state.
Then, a connecting terminal portion bending step (S2) is performed. As shown in fig. 7, in the connecting terminal portion bending step, in the first bus bar 500 in the expanded state, the second terminal portion 530b is bent at the boundary with the first terminal portion 530a so as to be overlapped with the first terminal portion 530 a.
Next, a connection terminal portion pressing step (S3) is performed. As shown in fig. 8A, in the connection terminal portion pressing step, the first terminal portion 530a and the second terminal portion 530b that are stacked are pressed and flattened in the thickness direction thereof. Thus, the surfaces of the first terminal portion 530a and the second terminal portion 530b facing each other are firmly adhered to each other.
Next, a connection terminal portion finishing process (S4) is performed. As shown in fig. 8B, in the connection terminal portion finishing step, first, the first hole 532a is formed in the first terminal portion 530a, and the second hole 532B is formed in the second terminal portion 530B, so that the through hole 532 is formed in the first rear connection terminal portion 530. Holes 534a and 534b through which the rivets 533 pass are formed in the first terminal portion 530a and the second terminal portion 530 b. Next, the portion that is flattened by pressing and overflows further to the left and right from the base end portion of the first terminal portion 530a is shaved off, and R processing is performed on the left and right corners 535 of the front end portion of the first rear connection terminal portion 530.
Finally, the whole bending step (S5) is performed. In the overall bending step, the first rear connection terminal portion 530 is bent into a final shape, and the first main body portion 510 and the first front connection terminal portion 520 are bent into final shapes. Further, the first terminal portion 530a and the second terminal portion 530b of the first rear connection terminal portion 530 are joined by a rivet 533.
Thus, the first bus bar 500 shown in fig. 3A is manufactured.
The film capacitor 1 is mounted in an electric vehicle, for example, in an inverter unit for driving a motor. The inverter unit is supplied with power from a power supply device (battery). In this case, an external terminal (not shown) connected to the power supply device is connected to the first rear connection terminal portion 530 of the first bus bar 500 and the second rear connection terminal portion 630 of the second bus bar 600 by screw tightening using the through holes 532 and 632. Further, external terminals (not shown) connected to the inverter circuit are connected to the first front connection terminal portion 520 of the first bus bar 500 and the second front connection terminal portion 620 of the second bus bar 600 by screw tightening using the through holes 522 and 622.
When the motor is driven, that is, when the film capacitor 1 is energized, a large current from the power supply device can flow to the first rear connection terminal portion 530 and the second rear connection terminal portion 630 connected to the power supply device.
In the present embodiment, the first rear connection terminal portion 530 has a smaller width in the direction orthogonal to the flow of current (left-right direction) than the first main body portion 510 of the first bus bar 500, but has a thicker thickness than the first main body portion 510 because of the structure in which the first terminal portion 530a and the second terminal portion 530b overlap each other. As a result, the first rear connection terminal portion 530 has a large cross-sectional area in a direction (left-right direction) orthogonal to the flow of current, and thus has a small resistance. Thus, heat generation in the first rear connection terminal portion 530 when a large current flows is reduced. Similarly, the second rear connection terminal portion 630 is also narrower in width in the direction orthogonal to the flow of current (left-right direction) than the second main body portion 610 of the second bus bar 600, and on the other hand, is thicker than the second main body portion 610 because of the structure in which the first terminal portion 630a and the second terminal portion 630b overlap each other. Thus, heat generation in the second rear connection terminal portion 630 when a large current flows is reduced.
< effects of embodiments >
As described above, according to the present embodiment, the following effects can be achieved.
First and second rear connection terminal portions 530 and 630 that can be connected to external terminals are provided at the ends of the first and second bus bars 500 and 600, and these connection terminal portions 530 and 630 include first terminal portions 530a and 630a extending from the ends of the first and second bus bars 500 and 600 and second terminal portions 530b and 630b that overlap the first terminal portions 530a and 630 a.
According to this structure, the thicknesses of the first rear connection terminal portion 530 and the second rear connection terminal portion 630 become large, so that the cross-sectional area in the direction orthogonal to the flow of current (the left-right direction) becomes large, and the resistance becomes small. Accordingly, heat generation of the first rear connection terminal portion 530 and the second rear connection terminal portion 630 when a current flows can be reduced, and thus thermal damage of the capacitor element 400 due to propagation of such heat to the capacitor element 400 can be prevented.
The first rear connection terminal portion 530 and the second rear connection terminal portion 630 have through holes 532 and 632, and the through holes 532 and 632 are constituted by first holes 532a and 632a formed in the first terminal portions 530a and 630a and second holes 532b and 632b formed in the second terminal portions 530b and 630b, respectively, and the diameters of the first holes 532a and 632a and the second holes 532b and 632b are the same.
When the diameters of the first holes 532a and 632a are different from the diameters of the second holes 532b and 632b, the diameter of one hole is set to a size necessary for connection of the external terminal, and the diameter of the other hole is set to be larger than the diameter of the one hole. In this case, in the portions of the through holes 532 and 632, the cross-sectional areas of the first rear connection terminal portion 530 and the second rear connection terminal portion 630 become smaller by an amount larger than one hole, and the electric resistance becomes larger. In contrast, in the present embodiment, the diameters of the first holes 532a and 632a and the second holes 532b and 632b are the same, so that the diameters of the first holes 532a and 632a and the second holes 532b and 632b can be uniform to the size necessary for connection of the external terminals. Therefore, the cross-sectional areas of the first rear connection terminal portion 530 and the second rear connection terminal portion 630 do not decrease and the electric resistance does not increase in the portions of the through holes 532 and 632.
The second terminal portions 530b and 630b are folded back from the distal ends of the first terminal portions 530a and 630a and are stacked on the first terminal portions 530a and 630 a.
According to this structure, the second terminal portions 530b and 630b do not have to be separately manufactured from the first bus bar 500 and the second bus bar 600 including the first terminal portions 530a and 630a, and thus the first bus bar 500 and the second bus bar 600 can be easily manufactured.
Further, the first and second rear connection terminal portions 530 and 630 have bent portions 531 and 631, and portions where the first and second terminal portions 530a and 630a and 530b and 630b overlap each other include the bent portions 531 and 631.
According to this structure, the thickness of the bent portions 531 and 631 increases, so that the rigidity of the bent portions 531 and 631 increases, and therefore the first rear connection terminal portion 530 and the second rear connection terminal portion 630 are less likely to be deformed on the side closer to the distal ends than the bent portions 531 and 631.
Further, in the first rear connection terminal portion 530 and the second rear connection terminal portion 630, the first terminal portions 530a and 630a and the second terminal portions 530b and 630b are joined by rivets 533 and 633 at portions on the opposite side of the bent portions 531 and 631 from the folded portions of the second terminal portions 530b and 630 b.
According to this structure, the first terminal portions 530a and 630a and the second terminal portions 530b and 630b are easily separated from the folded-back portions of the second terminal portions 530b and 630b, and the portions that are more easily separated from each other by forming the bent portions 531 and 631 are joined by the rivets 533 and 633, so that the adhesion between the first terminal portions 530a and 630a and the second terminal portions 530b and 630b in the portions can be improved. This can prevent the first and second rear connection terminal portions 530 and 630 from having a larger resistance due to the gaps (poor adhesion) between the first and second terminal portions 530a and 630a and 530 b.
Further, in the first rear connection terminal portion 530 and the second rear connection terminal portion 630, the end portion on the opposite side to the tip end side of the first rear connection terminal portion 530 and the second rear connection terminal portion 630 in the portion where the first terminal portions 530a, 630a and the second terminal portions 530b, 630b overlap each other is buried in the filling resin 300 filled in the case 200.
According to this structure, the root portions of the first rear connection terminal portion 530 and the second rear connection terminal portion 630, which are heavy due to the thickness increase, can be firmly supported by the filling resin 300, and therefore the first rear connection terminal portion 530 and the second rear connection terminal portion 630 are less likely to deform, and the positions of the first rear connection terminal portion 530 and the second rear connection terminal portion 630 can be maintained with high accuracy.
Further, the first bus bar 500 and the second bus bar 600 are manufactured by a bus bar manufacturing process including: a step of folding the first terminal portions 530a, 630a and the second terminal portions 530b, 630b in the expanded state by bending the boundaries between them; and pressing the first and second terminal portions 530a, 630a, 530b, 630b stacked in the thickness direction thereof.
According to this structure, since the first terminal portions 530a and 630a and the second terminal portions 530b and 630b are stacked by bending, the second terminal portions 530b and 630b are not required to be separately manufactured from the first bus bar 500 and the second bus bar 600 including the first terminal portions 530a and 630a, and the first bus bar 500 and the second bus bar 600 can be easily manufactured.
Further, the stacked first terminal portions 530a and 630a and second terminal portions 530b and 630b are flattened by pressing, so that the adhesion between the first terminal portions 530a and 630a and the second terminal portions 530b and 630b is improved. This can prevent the first and second rear connection terminal portions 530 and 630 from having a larger resistance due to the gaps (poor adhesion) between the first and second terminal portions 530a and 630a and 530 b. Further, the filling resin 300 can be prevented from entering between the first terminal portions 530a and 630a and the second terminal portions 530b and 630b, and the resistances of the first rear connection terminal portion 530 and the second rear connection terminal portion 630 can be prevented from becoming large.
< modification example >
The embodiments of the present disclosure have been described above, but the present disclosure is not limited to the above embodiments, and various modifications are possible in addition to the above embodiments to the application examples of the present disclosure.
For example, in the above-described embodiment, in the first bus bar 500, the first terminal portion 530a and the second terminal portion 530b of the first rear connection terminal portion 530 are joined by the rivet 533. Similarly, in the second bus bar 600, the first terminal portion 630a and the second terminal portion 630b of the second rear connection terminal portion 630 are joined by the rivet 633. However, the first terminal portions 530a, 630a and the second terminal portions 530b, 630b may be joined by other joining methods. For example, the first terminal portions 530a, 630a and the second terminal portions 530b, 630b may also be joined by crimping. In this case, as shown in fig. 9A, the following pressure-bonding structure can be adopted: projections 537, 637 are formed on the second terminal portions 530b, 630b, and the projections 537, 637 pass through holes 538, 638 formed in the first terminal portions 530a, 630a and are crushed (crimped). The protrusions 537, 637 may be formed in the first terminal portions 530a, 630a, or the holes 538, 638 may be formed in the second terminal portions 530b, 630 b. Further, for example, the first terminal portions 530a, 630a and the second terminal portions 530b, 630b may also be joined by brazing. In this case, as shown in fig. 9B, the solder sheet S is sandwiched between the first terminal portions 530a, 630a and the second terminal portions 530B, 630B. Then, the solder sheet S is heated and melted and then solidified again, so that the first terminal portions 530a and 630a and the second terminal portions 530b and 630b are bonded. Further, for example, the first terminal portions 530a and 630a and the second terminal portions 530b and 630b may be joined by welding such as spot welding. In the case where the first terminal portions 530a and 630a and the second terminal portions 530b and 630b are joined by brazing or welding, the brazing or welding may be integrally performed on the portions where the first terminal portions 530a and 630a and the second terminal portions 530b and 630b overlap each other.
In the above embodiment, the second terminal portions 530b and 630b are formed of the same material as the first terminal portions 530a and 630a, and are folded back at the distal ends of the first terminal portions 530a and 630a to be stacked on the first terminal portions 530a and 630a. However, as shown in fig. 10A and 10B, the second terminal portions 530B and 630B may be formed separately from the first terminal portions 530A and 630A, and the second terminal portions 530B and 630B may be stacked on the first terminal portions 530A and 630A and bonded. In this case, as shown in fig. 10A, the thicknesses of the first terminal portions 530A and 630A and the thicknesses of the second terminal portions 530b and 630b may be the same in the overlapping portions. Alternatively, the thicknesses of the first terminal portions 530a and 630a and the thicknesses of the second terminal portions 530b and 630b may be different in the overlapping portions. In the case where the thicknesses are different, as shown in fig. 10B, the thicknesses of the second terminal portions 530B and 630B may be set to be thicker than the thicknesses of the first terminal portions 530a and 630a. If so, the thicknesses of the first and second body portions 510, 610, which are integral with the first terminal portions 530a, 630a, do not become thick, and thus it is difficult to cause an increase in weight, an increase in cost, and the like of the first and second bus bars 500, 600. In addition, in the case where the first terminal portions 530A and 630A and the second terminal portions 530B and 630B are separated as described above, soldering by the solder sheet S may be performed integrally at the portions where the first terminal portions 530A and 630A and the second terminal portions 530B and 630B overlap each other as shown in fig. 10A and 10B. In addition, instead of brazing, welding may be performed. Further, in order to join the first terminal portions 530a and 630a and the second terminal portions 530b and 630b, the distal end portion side and the proximal end portion side may be rivet-stopped and pressure-bonded with the bent portions 531 and 631 therebetween.
Further, in the above embodiment, the through holes 532 and 632 for connection to the external terminals are formed in the first rear connection terminal portion 530 and the second rear connection terminal portion 630. However, as shown in fig. 10C, notch portions 539, 639 for connection with external terminals may be formed in the first rear connection terminal portion 530 and the second rear connection terminal portion 630. The shape of the cutout 539, 639 corresponds to the external terminal to be connected, and is, for example, U-shaped. The cutout portions 539, 639 are constituted by first cutout portions 539a, 639a formed in the first terminal portions 530a, 630a and second cutout portions 539b, 639b formed in the second terminal portions 530b, 630 b. At this time, the sizes of the first cutout portions 539a, 639a and the second cutout portions 539b, 639b (the width of the cutout portions, the depth of the cutout portions, etc.) are set to be the same. If the diameters of the first holes 532a and 632a and the second holes 532b and 632b are the same as those described above, the cross-sectional areas of the first rear connection terminal portion 530 and the second rear connection terminal portion 630 in the portions of the cutout portions 539 and 639 can be made not smaller and the electric resistance can be made not larger. The notch portions 539, 639 can be formed in the connection terminal portion finishing step of the bus bar manufacturing step, similarly to the through holes 532, 632.
Further, in the above embodiment, the width of the first terminal portions 530a and 630a in the left and right directions is the same as the width of the second terminal portions 530b and 630b in the left and right directions, and both end portions are identical. However, the first terminal portions 530a, 630a and the second terminal portions 530b, 630b may be made not to coincide with each other at both ends thereof in such a manner that one of the first terminal portions 530a, 630a and the second terminal portions 530b, 630b is larger than the other. In the case where the first terminal portions 530a and 630a and the second terminal portions 530b and 630b are separate, the distal ends of the first terminal portions 530a and 630a and the second terminal portions 530b and 630b may not coincide with each other.
Further, in the above embodiment, R processing is performed on the left and right corners 535, 635 after the first terminal portions 530a, 630a and the second terminal portions 530b, 630b are superimposed on the front end portions of the first rear connection terminal portion 530 and the second rear connection terminal portion 630. However, as shown in fig. 11A, a structure may be adopted in which a notch 535a (635 a) is formed at a boundary portion between the first terminal 530a (630 a) and the second terminal 530b (630 b), and the notch 535a (635 a) may form R at a left and right corner 535 (635) when the first terminal 530a (630 a) and the second terminal 530b (630 b) are stacked. Note that the notch 535a (635 a) may be formed in a C-cut shape when the first terminal 530a (630 a) and the second terminal 530b (630 b) are stacked.
Further, at the end portions of the first rear connection terminal portion 530 and the second rear connection terminal portion 630, after the first terminal portions 530a, 630a and the second terminal portions 530b, 630b are stacked, the first holes 532a, 632a and the second holes 532b, 632b and the holes 534a, 634a, 534b, 634b through which the rivets 533, 633 pass are opened. However, as shown in fig. 11B, the first hole 532a (632 a) and the second hole 532B (632B) may be formed in the first terminal portion 530a (630 a) and the second terminal portion 530B (630B) before the first terminal portion 530a (630 a) and the second terminal portion 530B (630B) are stacked, and the holes 534a (634 a) and 534B (634B) through which the rivet 533 (633) passes may be formed. In consideration of the positional displacement when the second terminal portion 530b (630 b) is folded back, one of the first hole 532a (632 a) and the second hole 532b (632 b) may be larger than the other. Similarly, one of the holes 534a (634 a) of the first terminal portion 530a (630 a) and the holes 534b (634 b) of the second terminal portion 530b (630 b) may be made larger than the other.
As with the first holes 532a, 632a and the second holes 532b, 632b, the first cutout portions 539a, 639a and the second cutout portions 539b, 639b of fig. 10C may be opened before the first terminal portions 530a, 630a and the second terminal portions 530b, 630b are stacked. In this case, one of the first cutout portions 539a, 639a and the second cutout portions 539b, 639b may be larger than the other.
In the above embodiment, the first rear connection terminal 530 and the second rear connection terminal 630 are configured such that the second terminal 530b and 630b are folded back from the distal ends of the first terminal 530a and 630a and overlapped with the first terminal 530a and 630 a. However, the first rear connection terminal 530 and the second rear connection terminal 630 may be configured such that the second terminal 530b, 630b is folded back from the left end or the right end of the first terminal 530a, 630a and overlapped with the first terminal 530a, 630 a.
Further, in the above embodiment, the thickness (cross-sectional area) of the first front connection terminal portion 520 of the first bus bar 500 and the second front connection terminal portion 620 of the second bus bar 600 may be increased by overlapping the first terminal portion and the second terminal portion.
Furthermore, in the above embodiment, the capacitor element unit 100 includes 6 capacitor elements 400. However, the number of capacitor elements 400 may be appropriately changed to 1.
Further, in the above embodiment, the capacitor element 400 is formed by overlapping 2 pieces of metallized films obtained by depositing aluminum on the dielectric film and winding or laminating the overlapped metallized films, but in addition to this, the capacitor element 400 may be formed by overlapping a metallized film obtained by depositing aluminum on both surfaces of the dielectric film and an insulating film and winding or laminating the overlapped metallized films and insulating films.
Further, in the above-described embodiment, the thin film capacitor 1 is exemplified as an example of the capacitor of the present disclosure. However, the present disclosure can also be applied to capacitors other than the film capacitor 1.
In addition, the embodiments of the present disclosure can be modified in various ways within the scope of the technical idea shown in the claims.
In the description of the above embodiment, terms such as "upper" and "lower" indicate relative directions depending only on the relative positional relationship of the constituent members, and do not indicate absolute directions such as the vertical direction and the horizontal direction.
Industrial applicability
The present disclosure is useful in capacitors used for various electronic devices, electric devices, industrial devices, electric devices of vehicles, and the like.
Reference numerals illustrate:
1. film capacitor (capacitor)
200. Shell body
300. Filling resin
400. Capacitor element
410. First terminal electrode (electrode)
420. Second end face electrode (electrode)
500. First bus bar (terminal component)
520. First front connection terminal part
521. Bending part
522. Through hole
530. First rear connection terminal (connection terminal)
530a first terminal portion
530b second terminal portion
531. Bending part
532. Through hole
532a first hole
532b second hole
533. Rivet
535a cutout portion
539. Cut-out part
539a first notch
539b second cut-out portion
600. Second bus bar (terminal component)
620. Second front connection terminal part
621. Bending part
622. Through hole
630. Second rear connection terminal (connection terminal)
630a first terminal part
630b second terminal portion
631. Bending part
632. Through hole
632a first hole
632b second hole
633. Rivet
639. Cut-out part
639a first notch
639b second cutout portions.
Claims (15)
1. A capacitor is provided with:
a capacitor element; and
a terminal member connected to the electrode of the capacitor element,
the terminal member includes a connection terminal portion provided at an end portion of the terminal member and connectable to an external terminal,
the connection terminal portion includes a first terminal portion extending from the end portion of the terminal member and a second terminal portion overlapping the first terminal portion,
the capacitor element is formed by a metallized film obtained by vapor deposition of a metal containing aluminum on a dielectric film,
the second terminal portion is connected to one end of the first terminal portion, and is folded back from the one end of the first terminal portion to overlap the first terminal portion.
2. The capacitor as claimed in claim 1, wherein,
the connection terminal portion has a through hole or a cutout portion for connection with the external terminal.
3. The capacitor as claimed in claim 1, wherein,
the connection terminal portion has a through hole for connection with the external terminal,
the through hole is formed by a first hole formed in the first terminal portion and a second hole formed in the second terminal portion,
the diameter of the first hole is the same as the diameter of the second hole.
4. The capacitor as claimed in claim 1, wherein,
the connection terminal portion has a cutout portion for connection with the external terminal,
the notch portion is composed of a first notch portion formed in the first terminal portion and a second notch portion formed in the second terminal portion,
the first cutout portion is the same size as the second cutout portion.
5. The capacitor as claimed in any one of claims 1 to 4, wherein,
the thickness of the portion of the first terminal portion overlapping the second terminal portion is the same as the thickness of the portion of the second terminal portion overlapping the first terminal portion.
6. The capacitor as claimed in claim 1, wherein,
The second terminal portion and the first terminal portion overlap each other to have a thickness greater than that of the first terminal portion and the second terminal portion.
7. The capacitor as claimed in any one of claims 1 to 4, wherein,
the first terminal portion and the second terminal portion are joined.
8. The capacitor as claimed in claim 7, wherein,
the first terminal portion and the second terminal portion are joined by a rivet.
9. The capacitor as claimed in claim 7, wherein,
the first terminal portion and the second terminal portion are joined by crimping.
10. The capacitor as claimed in claim 7, wherein,
the first terminal portion and the second terminal portion are joined by brazing or welding.
11. The capacitor as claimed in any one of claims 1 to 4, wherein,
the connection terminal portion has a bent portion,
the portion where the first terminal portion and the second terminal portion overlap each other includes the bent portion.
12. The capacitor as claimed in claim 1, wherein,
the connection terminal portion has a bent portion,
the portion where the first terminal portion and the second terminal portion overlap each other includes the bent portion,
In the connection terminal portion, the first terminal portion and the second terminal portion are joined at a portion opposite to the one end of the first terminal portion with respect to the bent portion.
13. The capacitor as claimed in any one of claims 1 to 4, wherein,
the capacitor further includes:
a case accommodating the capacitor element to which the terminal member is connected; and
a filling resin filled in the housing,
in the connection terminal portion, an end portion on a side opposite to a tip end of the connection terminal portion in a portion where the first terminal portion and the second terminal portion overlap each other is buried in the filling resin.
14. A capacitor is provided with:
a capacitor element; and
a terminal member connected to the electrode of the capacitor element,
the terminal member includes a connection terminal portion provided at an end portion of the terminal member and connectable to an external terminal,
the connection terminal portion includes a first terminal portion extending from the end portion of the terminal member and a second terminal portion overlapping the first terminal portion,
the capacitor element is formed by a metallized film obtained by vapor deposition of a metal containing aluminum on a dielectric film,
The first terminal portion and the second terminal portion are each formed of a conductive material,
the connection terminal portion has a bent portion,
the portion where the first terminal portion and the second terminal portion overlap each other includes the bent portion.
15. A method for manufacturing a capacitor includes a step of manufacturing a terminal member and a step of connecting the terminal member to an electrode of a capacitor element,
the terminal member includes a connection terminal portion provided at an end portion of the terminal member and connectable to an external terminal,
the connecting terminal part comprises a first terminal part extending from the end part and a second terminal part overlapped with the first terminal part,
the second terminal portion is connected to one end of the first terminal portion and folded back from the one end of the first terminal portion to overlap the first terminal portion,
the process of manufacturing the terminal member includes the steps of:
folding the first terminal portion and the second terminal portion in the unfolded state by bending a boundary between the first terminal portion and the second terminal portion; and
and pressing the first terminal portion and the second terminal portion which are overlapped in the thickness direction of the first terminal portion and the second terminal portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311025518.6A CN116936259A (en) | 2018-08-08 | 2019-07-23 | Capacitor with a capacitor body |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-149807 | 2018-08-08 | ||
| JP2018149807 | 2018-08-08 | ||
| PCT/JP2019/028733 WO2020031676A1 (en) | 2018-08-08 | 2019-07-23 | Capacitor and method for producing capacitor |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311025518.6A Division CN116936259A (en) | 2018-08-08 | 2019-07-23 | Capacitor with a capacitor body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112514015A CN112514015A (en) | 2021-03-16 |
| CN112514015B true CN112514015B (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921169164.1U Active CN210489447U (en) | 2018-08-08 | 2019-07-23 | Capacitor with a capacitor element |
| CN201980049921.8A Active CN112514015B (en) | 2018-08-08 | 2019-07-23 | Capacitor and method for manufacturing capacitor |
| CN202311025518.6A Pending CN116936259A (en) | 2018-08-08 | 2019-07-23 | Capacitor with a capacitor body |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921169164.1U Active CN210489447U (en) | 2018-08-08 | 2019-07-23 | Capacitor with a capacitor element |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311025518.6A Pending CN116936259A (en) | 2018-08-08 | 2019-07-23 | Capacitor with a capacitor body |
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| Country | Link |
|---|---|
| JP (1) | JP7426559B2 (en) |
| CN (3) | CN210489447U (en) |
| WO (1) | WO2020031676A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009252935A (en) * | 2008-04-04 | 2009-10-29 | Panasonic Corp | Case molded capacitor |
| CN103635981A (en) * | 2011-06-29 | 2014-03-12 | 双信电机株式会社 | Capacitor |
| WO2015012187A1 (en) * | 2013-07-22 | 2015-01-29 | 株式会社Ｇｓユアサ | Electricity storage device and method for manufacturing electricity storage device |
| WO2018016349A1 (en) * | 2016-07-21 | 2018-01-25 | パナソニックＩｐマネジメント株式会社 | Capacitor |
| JP2018068096A (en) * | 2016-10-14 | 2018-04-26 | 株式会社デンソー | Current sensor device |
-
2019
- 2019-07-23 CN CN201921169164.1U patent/CN210489447U/en active Active
- 2019-07-23 JP JP2020536431A patent/JP7426559B2/en active Active
- 2019-07-23 CN CN201980049921.8A patent/CN112514015B/en active Active
- 2019-07-23 CN CN202311025518.6A patent/CN116936259A/en active Pending
- 2019-07-23 WO PCT/JP2019/028733 patent/WO2020031676A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009252935A (en) * | 2008-04-04 | 2009-10-29 | Panasonic Corp | Case molded capacitor |
| CN103635981A (en) * | 2011-06-29 | 2014-03-12 | 双信电机株式会社 | Capacitor |
| WO2015012187A1 (en) * | 2013-07-22 | 2015-01-29 | 株式会社Ｇｓユアサ | Electricity storage device and method for manufacturing electricity storage device |
| WO2018016349A1 (en) * | 2016-07-21 | 2018-01-25 | パナソニックＩｐマネジメント株式会社 | Capacitor |
| JP2018068096A (en) * | 2016-10-14 | 2018-04-26 | 株式会社デンソー | Current sensor device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2020031676A1 (en) | 2021-08-12 |
| CN112514015A (en) | 2021-03-16 |
| WO2020031676A1 (en) | 2020-02-13 |
| CN210489447U (en) | 2020-05-08 |
| CN116936259A (en) | 2023-10-24 |
| JP7426559B2 (en) | 2024-02-02 |
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