Capacitor module

Abstract

To provide a capacitor module which secures insulation between a case and a capacitor element to inhibit short circuits.SOLUTION: A capacitor module includes: a capacitor assembly having a capacitor element having a pair of end surface electrodes and a side surface connecting the pair of end surface electrodes, and external terminals electrically connected to the end surface electrodes; a conductive case in which an opening is provided at a position facing a bottom surface and which houses the capacitor assembly; a sheet-like insulation member which covers at least parts of portions facing an inner surface or the bottom surface of the case in the end surface electrodes and the external terminals; and a sealing resin filling the case.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a capacitor module.

Background Art

[0002] A capacitor module in which a film capacitor is housed in a case and sealed with resin is known. For example, Patent Document 1 discloses a metallized film capacitor including a case, a plurality of capacitor elements housed in the case, external lead terminals, and a resin composition filled in the case to bury the capacitor elements.

[0003] In addition, for the purpose of improving the heat dissipation of the capacitor module, it has been considered to adopt a metal such as aluminum as the material of the case.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the metallized film capacitor described in Patent Document 1, when the case is formed of metal, there is still room for improvement in ensuring insulation between the case and the capacitor element.

[0006] The present disclosure provides a capacitor module capable of ensuring insulation between a case and a capacitor element and suppressing a short circuit.

Means for Solving the Problems

[0007] The capacitor module of the present disclosure A capacitor module having a capacitor element with a pair of end face electrodes and a side face connecting the pair of end face electrodes, and an external terminal electrically connected to the end face electrodes. A conductive case having an opening at a position facing the bottom surface and accommodating the capacitor assembly. A sheet-like insulating member covering at least a part of the end face electrode and a part of the external terminal facing the inner surface or the bottom surface of the case. A sealing resin filled in the case. It is provided with.

Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a capacitor module capable of ensuring insulation between the case and the capacitor element and suppressing a short circuit.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

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Figure 7

Figure 8

Modes for Carrying Out the Invention

[0010] (Background Leading to the Present Disclosure) In a capacitor module in which a capacitor element is housed in a case and sealed with resin, when an electric current is passed through the capacitor, the capacitor generates heat, which may exceed the heat-resistant temperature of the capacitor module. Therefore, efficient cooling of the capacitor module has been studied. As a method of cooling the capacitor module, forming the case from a material having a high thermal conductivity such as aluminum has been studied.

[0011] When the capacitor element is housed in the case and sealed with resin, the resin may not flow sufficiently between the capacitor element and the case, or the capacitor element may be disposed inclined with respect to the case. In this case, there is a risk that the electrode of the capacitor element comes into contact with the case, and when the case is formed of a conductive material such as aluminum, there is a problem that the capacitor element and the case are short-circuited.

[0012] The present inventor(s) studied a capacitor module capable of ensuring insulation between the case and the capacitor element, and arrived at the following invention.

[0013] (Embodiment 1) [Overall Configuration] FIG. 1 is a schematic plan view showing a capacitor module 1 according to Embodiment 1. FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1. FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1. In FIG. 1, the encapsulating resin 50 is omitted. In the figure, the X, Y, and Z directions indicate the lateral direction, longitudinal direction, and height direction of the capacitor module 1, respectively.

[0014] As shown in FIGS. 1 to 3, the capacitor module 1 includes a capacitor assembly 10, a case 30, an insulating member 40, and an encapsulating resin 50. In the capacitor module 1, the capacitor assembly 10, at least a part of which is covered with the insulating member 40, is housed in the case 30 and sealed with the encapsulating resin 50.

[0015] [Capacitor Assembly] The capacitor assembly 10 is formed by combining a capacitor element 20 and external terminals 23a and 23b that are electrically connected to a pair of end face electrodes 21a and 21b of the capacitor element 20. In the present embodiment, as shown in FIG. 3, the capacitor assembly 10 includes two capacitor elements 20.

[0016] The capacitor element 20 has a pair of end face electrodes 21a and 21b and a side surface 22 that connects the pair of end face electrodes 21a and 21b. In the present embodiment, as shown in FIG. 3, the capacitor element 20 is formed in a columnar shape having an oval cross section. The shape of the capacitor element 20 is not limited to this, and can be any shape such as a cylinder or a prism.

[0017] The capacitor element 20 is, for example, a film capacitor composed of a laminate of dielectric films. The capacitor element 20 is formed by stacking dielectric films with a metal vapor deposition film formed on the surface and then winding them. In the present embodiment, the capacitor element 20 is formed in a columnar shape having an oval cross section by pressing the wound body of the dielectric film into a flat shape. End face electrodes 21a and 21b are provided on both end faces of the capacitor element 20. The end face electrodes 21a and 21b can be formed, for example, by spraying a conductive material such as Zn onto the end faces of the wound body of the dielectric film.

[0018] External terminals 23a and 23b are electrically connected to the end face electrodes 21a and 21b of the capacitor element 20. More specifically, the external terminal 23a is electrically connected to the end face electrode 21a, and the external terminal 23b is electrically connected to the end face electrode 21b. The external terminal 23a is a bus bar that connects the end face electrodes 21a of the two capacitor elements 20 in parallel to each other, and the external terminal 23b is a bus bar that connects the end face electrodes 21b of the two capacitor elements 20 in parallel to each other. The end face electrodes 21a and 21b and the external terminals 23a and 23b are connected, for example, by solder. A part of the external terminals 23a and 23b is disposed outside the case 30 and is used when connecting the capacitor module 1 to an external device or the like.

[0019] The external terminals 23a and 23b are formed, for example, by pressing a plate-shaped metal. In the present embodiment, as shown in FIG. 2, the external terminals 23a and 23b are formed by bending a plate-shaped metal. However, the external terminals 23a and 23b may be members having conductivity such as lead wires. In the present embodiment, one external terminal 23a is connected to one end face electrode 21a of each of the two capacitor elements 20, and one external terminal 23b is connected to the other end face electrode 21b of each of the two capacitor elements 20.

[0020] In the present embodiment, the external terminal 23a connected to one end face electrode 21a has a first portion 26a provided along the end face electrode 21a and a bent portion 27a bent at the tip of the first portion 26a. Similarly, the external terminal 23b connected to the other end face electrode 21b has a first portion 26b provided along the end face electrode 21b and a bent portion 27b bent at the tip of the first portion 26b. Further, in the present embodiment, the external terminals 23a and 23b have external connection portions 28a and 28b extending from the bent portions 27a and 27b toward the outside of the case 30.

[0021] As shown in FIGS. 2 and 3, in the present embodiment, the capacitor assembly 10 is disposed in the case 30 with the end face electrodes 21a and 21b facing the inner surface 33 of the case 30.

[0022] <Case> The case 30 is a case for housing the capacitor assembly 10. The case 30 has a bottom surface 31 and an opening 32 at a position facing the bottom surface 31. Here, the bottom surface 31 means the inner bottom surface 31 of the case 30. In the present embodiment, as shown in FIG. 1, the bottom surface 31 of the case 30 is formed in a rectangular shape, and the case 30 is formed in a box shape having an opening 32. The shape of the case 30 is not limited to this, and any shape that can house the capacitor assembly 10 and be sealed with the sealing resin 50 may be used.

[0023] The case 30 is formed of a conductive material. Examples of the conductive material include metals such as aluminum, iron, and stainless steel. Alternatively, as the material of the case 30, a resin in which a conductive filler such as a metal filler is dispersed can also be used. That is, it is sufficient that the case 30 has conductivity. By forming the case 30 of a material with high thermal conductivity such as a metal or a resin containing a metal filler, the cooling performance of the capacitor module 1 can be improved.

[0024] <Insulating member> The insulating member 40 is a member for ensuring insulation between the end face electrodes 21a and 21b and the external terminals 23a and 23b of the capacitor assembly 10 and the case 30 by covering a part of the capacitor assembly 10. The insulating member 40 is, for example, a thin sheet-like insulating member having flexibility, such as insulating paper, an insulating film, or an insulating sheet. Alternatively, the insulating member 40 may be a thin plate-like resin or the like. In the present embodiment, an example in which the insulating member 40 is formed of insulating paper will be described. As shown in FIGS. 1 to 3, in the present embodiment, the insulating member 40 covers at least a part of the end face electrodes 21a and 21b and the external terminals 23a and 23b. In other words, the insulating member 40 covers a portion of the end face electrodes 21a and 21b and the external terminals 23a and 23b that may come into contact with the case 30. When the capacitor assembly 10 is disposed inclined inside the case 30, the end face electrodes 21a and 21b and the external terminals 23a and 23b may come into contact with the bottom surface 31 or the inner surface 33 of the case 30. Therefore, for example, by covering the end face electrodes 21a and 21b with the insulating member 40 and further covering the portions of the external terminals 23a and 23b facing the inner surface 33 or the bottom surface 31 of the case 30, it is possible to suppress the capacitor assembly 10 from coming into contact with the case and causing a short circuit.

[0025] As shown in FIGS. 2 and 3, in this embodiment, the insulating member 40 includes a first insulating member 40a that covers one end face electrode 21a of the capacitor element 20, and a second insulating member 40b that covers the other end face electrode 21b of the capacitor element 20. That is, each end face electrode 21a, 21b is covered by two insulating members 40a, 40b, respectively. Further, in this embodiment, as shown in FIGS. 1 and 3, the insulating member 40 includes a third insulating member 41 that is disposed along the side surface 22 of the capacitor element 20 between the first insulating member 40a and the second insulating member 40b. In this embodiment, a pair of third insulating members 41 are provided at intervals in the X direction. One of the third insulating members 41 faces the side surface 22 of one of the two capacitor elements 20, and the other third insulating member 41 faces the side surface 22 of the other capacitor element 20.

[0026] Also, in this embodiment, among the end face electrodes 21a, 21b, regions 25a, 25b that are exposed from the side surface 22 of the capacitor element 20 and face the bottom surface 31 of the case 30 are also covered by the insulating member 40. The first insulating member 40a is disposed along the end face electrode 21a and bent toward the side surface 22 of the capacitor element 20 at the lower end of the end face electrode 21a, so that the first insulating member 40a can cover the region 25a. That is, the first insulating member 40a has a bent portion 41a. Similarly, the second insulating member 40b is disposed along the end face electrode 21b and bent toward the side surface 22 of the capacitor element 20 at the lower end of the end face electrode 21b, so that the second insulating member 40b can cover the region 25b. That is, the second insulating member 40b has a bent portion 41b.

[0027] Therefore, in this embodiment, at least a part of the end face electrodes 21a, 21b and the external terminals 23a, 23b of the capacitor assembly 10 are covered by the insulating member 40. The insulating member 40 is, for example, a sheet-shaped insulating member formed with a thickness of 0.05 mm or more and 1.0 mm or less. The insulating member 40 is attached to the capacitor assembly 10 by, for example, a double-sided adhesive tape or the like.

[0028] Also, in the present embodiment, the two external terminals 23a and 23b have an overlapping portion 24 where the external connection portions 28a and 28b are arranged to overlap each other. In order to insulate the external terminal 23a and the external terminal 23b in the overlapping portion 24, an insulating member 60 different from the insulating member 40 is arranged. Since the two external terminals 23a and 23b have the overlapping portion 24, currents flowing in opposite directions in the external connection portion 28a and the external connection portion 28b cancel out the magnetic fields generated by the currents flowing through each of them, and the inductance of the capacitor module 1 can be reduced.

[0029] <Encapsulating resin> The encapsulating resin 50 is filled in the case 30 to encapsulate the capacitor assembly 10 housed in the case 30. The encapsulating resin 50 is composed of, for example, a highly thermosetting resin such as an epoxy resin or a urethane resin.

[0030] Normally, by filling the case 30 with the encapsulating resin 50, the capacitor assembly 10 and the case 30 can be insulated. However, when the distance between the capacitor assembly 10 and the case 30 is short, or when the capacitor assembly 10 tilts when the case 30 is filled with the encapsulating resin 50, the capacitor assembly 10 and the inner surface 33 of the case 30 may come into contact. In particular, when the capacitor assembly 10 tilts, the corner portion c1 of the capacitor assembly 10 shown in FIG. 2 is particularly likely to contact the case 30.

[0031] In the present embodiment, as shown in FIGS. 1 to 3, portions of the end face electrodes 21a and 21b and the external terminals 23a and 23b that may come into contact with the inner surface 33 and the bottom surface 31 of the case 30 are covered with the insulating member 40. Therefore, it is possible to provide a capacitor module 1 that can ensure insulation between the capacitor assembly 10 and the case 30 and suppress a short circuit.

[0032] [Effect] According to the above-described embodiment, the following effects can be achieved.

[0033] The capacitor module 1 includes a capacitor assembly 10, a case 30, a sheet-like insulating member 40, and a sealing resin 50. The capacitor assembly 10 includes a capacitor element 20 having a pair of end face electrodes 21a, 21b and a side face 22 connecting the pair of end face electrodes 21a, 21b, and external terminals 23a, 23b electrically connected to the end face electrodes 21a, 21b. The case 30 is provided with an opening 32 at a position facing the bottom surface 31, and is a case for housing the capacitor assembly 10. The case 30 is made of a conductive material. The insulating member 40 covers at least a part of the portions of the end face electrodes 21a, 21b and the external terminals 23a, 23b that face the inner side surface 33 or the bottom surface 31 of the case, and insulates the case 30 and the capacitor assembly 10. The sealing resin 50 is filled in the case 30 to seal the capacitor assembly 10. Here, the portions facing the inner side surface 33 or the bottom surface 31 of the case include the portions of the end face electrodes 21a, 21b and the external terminals 23a, 23b that face the inner side surface 33 or the bottom surface 31 of the case via the sealing resin 50.

[0034] With such a configuration, it is possible to provide a capacitor module 1 that can ensure insulation between the case 30 and the capacitor assembly 10 and suppress a short circuit.

[0035] Further, by covering at least a part of the end face electrodes 21a, 21b and the external terminals 23a, 23b with the insulating member 40, even if the distance between the capacitor assembly 10 and the inner side surface 33 and the bottom surface 31 of the case 30 is reduced, insulation between the capacitor assembly 10 and the case 30 can be ensured. Therefore, the capacitor module 1 can be miniaturized while ensuring insulation.

[0036] The capacitor assembly 10 is disposed in the case 30 with one end face electrode 21a and the other end face electrode 21b facing the inner side surface 33 of the case 30.

[0037] With such a configuration, insulation between the capacitor assembly 10 and the case 30 can be ensured, short circuits can be suppressed, and a highly reliable capacitor module 1 can be provided.

[0038] The insulating member 40 includes a first insulating member 40a that covers one end face electrode 21a and a second insulating member 40b that covers the other end face electrode 21b.

[0039] With such a configuration, the arrangement of the shape becomes easy, and the design freedom of the capacitor module 1 can be improved.

[0040] The insulating member 40 includes a third insulating member 41 that is arranged along the side surface 22 of the capacitor element 20 between the first insulating member 40a and the second insulating member 40b.

[0041] With such a configuration, the effect of suppressing contact between the end face electrodes 21a, 21b and the case 30 can be improved.

[0042] The external terminals 23a, 23b have bent portions 27a, 27b that are bent at the tips of the first portions 26a, 26b provided along the end face electrodes 21a, 21b, and the insulating member 40 covers the bent portions 27a, 27b of the external terminals 23a, 23b.

[0043] With such a configuration, contact between the external terminals 23a, 23b and the case 30 can be more effectively suppressed.

[0044] The material of the case 30 includes metal.

[0045] With such a configuration, the cooling performance of the capacitor module 1 can be improved.

[0046] The material of the case 30 includes aluminum.

[0047] With such a configuration, the cooling performance of the capacitor module 1 can be further improved.

[0048] [Modification Example] In the above-described embodiment, an example in which the capacitor assembly 10 includes two capacitor elements 20 has been described, but the present invention is not limited thereto. The capacitor assembly 10 may include only one capacitor element 20 or may include three or more capacitor elements 20.

[0049] Also, in the above-described embodiment, an example in which the insulating member 40 is formed of insulating paper has been described, but the present invention is not limited thereto. The insulating member 40 may be, for example, a cover or the like that can be processed from a thin resin plate to cover at least a part of the capacitor assembly 10.

[0050] FIG. 4 is a schematic top view showing a capacitor module 1A according to Modification Example 1 of Embodiment 1. In the capacitor module 1A, the third insulating member 141 includes a first bent portion 142a bent so as to overlap the end portion of the first insulating member 40a from the outside and a second bent portion 142b bent so as to overlap the outside from the end portion of the second insulating member 40b.

[0051] By providing the first bent portion 142a and the second bent portion 142b on the third insulating member 141, it is possible to more effectively suppress the corner portion c2 of the capacitor assembly 10 from contacting the inner surface 33 of the case 30 when the capacitor module 1A is viewed from the height direction.

[0052] FIG. 5 is a schematic cross-sectional view showing a capacitor module 1B according to Modification 2 of Embodiment 1. In the capacitor module 1B, a part of the bent portions 27a and 27b of the external terminals 23a and 23b is covered with an insulating member 240. Specifically, the first insulating member 240a extends from the bottom surface 31 of the case 30 toward the opening 32 along the end face electrode 21a and the first portion 26a of the external terminal 23a, and bends along the external terminal 23a to cover a part of the bent portion 27a of the external terminal 23a. Similarly, the second insulating member 240b extends from the bottom surface 31 of the case 30 toward the opening 32 along the end face electrode 21b and the first portion 26b of the external terminal 23b, and bends along the external terminal 23b to cover a part of the bent portion 27b of the external terminal 23b.

[0053] With such a configuration, contact between the external terminals 23a and 23b and the case 30 can be further suppressed.

[0054] FIG. 6 is a schematic cross-sectional view showing a capacitor module 1C according to Modification 3 of Embodiment 1. In the capacitor module 1C, one end face electrode 21a and the other end face electrode 21b are covered with a single insulating member 340. Specifically, the insulating member 340 is integrally formed with a portion 340a that covers one end face electrode 21a, a portion 340b that covers the other end face electrode 21b, and a portion 340c that is disposed facing the bottom surface 31 of the case 30.

[0055] With such a configuration, contact between the capacitor assembly 10 and the case 30 can be suppressed by a single insulating member 340.

[0056] (Embodiment 2) The capacitor module 2 according to Embodiment 2 of the present disclosure will be described. In Embodiment 2, mainly the differences from Embodiment 1 will be described. In Embodiment 2, the same or equivalent configurations as those in Embodiment 1 will be described with the same reference numerals. Also, in Embodiment 2, descriptions overlapping those in Embodiment 1 will be omitted.

[0057] FIG. 7 is a schematic plan view showing the capacitor module 2 according to Embodiment 2. FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7. Note that the encapsulating resin 50 is omitted in FIG. 7. In Embodiment 2, it is different from Embodiment 1 in that one end face electrode 21a of the capacitor element 20 is arranged facing the bottom face 31 of the case 30.

[0058] As shown in FIGS. 7 and 8, in the capacitor module 2, one end face electrode 21a of the capacitor element 20 is arranged facing the bottom face 31 of the case 30. Therefore, the other end face electrode 21b is arranged facing the opening 32 of the case 30. For this reason, the external terminal 423a connected to one end face electrode 21a has a second portion 426a extending along the end face electrode 21a and a third portion 427a extending along the side face 22 of the capacitor element 20 from the end of the second portion 426a. Further, the external terminal 423b connected to the other end face electrode 21b has a second portion 426b extending along the end face electrode 21b and a third portion 427b extending outward from the end of the second portion 426b of the case 30.

[0059] The insulating member 440 includes a fourth insulating member 441 that covers one end face electrode 21a and the second portion 426a of the external terminal 423a connected to one end face electrode 21a. The fourth insulating member 441 covers the portion of the capacitor assembly 10 facing the bottom face 31 of the case 30, the portion where the third portion 427a of the external terminal 423a is arranged, and the portion on the side opposite to the third portion 427a. Among the capacitor assembly 10, the portion where the third portion 427a of the external terminal 423a is arranged and the portion on the side opposite to the third portion 427a are portions facing the inner side face 33 of the case 30. Further, the insulating member 440 includes a fifth insulating member 442 that covers the portion of the capacitor assembly 10 facing the inner side face 33 that is not covered by the fourth insulating member 441.

[0060] The fourth insulating member 441 and the fifth insulating member 442 can cover the portions of the capacitor assembly 10 facing the bottom face 31 and the inner side face 33 of the case 30, and can suppress the contact between the capacitor assembly 10 and the case 30.

[0061] (Summary of Embodiment) (1) The capacitor module of the present disclosure includes a capacitor assembly having a capacitor element with a pair of end face electrodes and a side surface connecting the pair of end face electrodes, and external terminals electrically connected to the end face electrodes, a conductive case having an opening provided at a position facing the bottom surface and accommodating the capacitor assembly, a sheet-like insulating member covering at least a part of the portions of the end face electrodes and the external terminals facing the inner surface or the bottom surface of the case, and a sealing resin filled in the case.

[0062] (2) In the capacitor module of (1), the capacitor assembly may be disposed in the case with one end face electrode and the other end face electrode facing the inner surface of the case.

[0063] (3) In the capacitor module of (2), the insulating member may include a first insulating member covering one end face electrode and a second insulating member covering the other end face electrode.

[0064] (4) In the capacitor module of (3), the insulating member may include a third insulating member disposed along the side surface of the capacitor element between the first insulating member and the second insulating member.

[0065] (5) In the capacitor module of (4), the third insulating member may have a first bent portion bent so as to overlap the end of the first insulating member from the outside and a second bent portion bent so as to overlap the end of the second insulating member from the outside.

[0066] (6) In any one of the capacitor modules of (1) to (5), the external terminal has a bent portion bent at the tip of a first portion provided along the end face electrode, and the insulating member may cover the bent portion of the external terminal.

[0067] (7) In the capacitor module of (1), the capacitor assembly 10 is disposed in the case with one end face electrode facing the bottom surface of the case, and the insulating member may cover the one end face electrode.

[0068] (8) In the capacitor module of (7), the capacitor assembly is disposed with the other end face electrode facing the opening of the case, and the insulating member may cover at least a portion of the other end face electrode facing the inner side surface of the case.

[0069] (9) In any one of the capacitor modules of (1) to (8), the material of the case may contain metal.

[0070] (10) In any one of the capacitor modules of (1) to (9), the material of the case may contain aluminum.

Industrial Applicability

[0071] The present disclosure is useful for capacitor modules used in various electronic devices, electrical devices, industrial devices, vehicle devices, etc.

Explanation of Reference Numerals

[0072] 1, 1A to 1C, 2 Capacitor modules 10 Capacitor assembly 20 Capacitor elements 21a End face electrode 21b End face electrode 22 Side surface 23a, 23b, 423a, 423b External terminals 26a, 26b First part 27a, 27b Bending portion 30 Case 31 Bottom surface 32 Opening 33 Inner side surface 40, 240, 340, 440 Insulating member 40a, 240a First insulating member 40b, 240b Second insulating member 41, 141 The third insulating member 50 Sealing resin 142a The first bent portion 142b The second bent portion

Claims

1. A capacitor module comprising: a capacitor element having a pair of end face electrodes and a side face connecting the pair of end face electrodes; and external terminals electrically connected to the end face electrodes. A conductive case having an opening at a position facing the bottom surface and accommodating the capacitor assembly. A sheet-like insulating member covering at least a part of the portions of the end face electrodes and the external terminals facing the inner surface or the bottom surface of the case. A sealing resin filled in the case. Comprising: A capacitor module.

2. In the capacitor assembly, one of the end face electrodes and the other end face electrode are arranged in the case with the inner surface of the case facing them. The capacitor module according to claim 1.

3. The insulating member includes a first insulating member covering one of the end face electrodes and a second insulating member covering the other end face electrode. The capacitor module according to claim 2.

4. The insulating member includes a third insulating member arranged along the side face of the capacitor element between the first insulating member and the second insulating member. The capacitor module according to claim 3.

5. The third insulating member has a first bent portion bent so as to overlap the end of the first insulating member from the outside and a second bent portion bent so as to overlap the end of the second insulating member from the outside. The capacitor module according to claim 4.

6. The external terminal has a bent portion bent at the tip of a first portion provided along the end face electrode. The insulating member covers the bent portion of the external terminal. The capacitor module according to claim 1.

7. In the capacitor assembly, one of the end face electrodes is arranged in the case with the bottom surface of the case facing it. The insulating member covers one of the end face electrodes. The capacitor module according to claim 1.

8. In the capacitor assembly, the other end face electrode is arranged facing the opening of the case. The insulating member covers at least the portion of the other end face electrode facing the inner surface of the case. The capacitor module according to claim 7.

9. The material of the case includes metal. The capacitor module according to claim 1.

10. The material of the case includes aluminum. The capacitor module according to claim 1.

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