JP2023123134A - Capacitor module unit - Google Patents

Abstract

To provide a capacitor module unit capable of improving cooling performance of a capacitor module while protecting an extraction electrode.SOLUTION: A capacitor module 11 has a first side surface 111 and a second side surface at both ends in the width direction W. A cover 20 does not cover the first side surface 111 and the second side surface. A part of the first side surface 111 is covered by a first positive electrode protection member 51, a first negative electrode protection member 52, a second positive electrode protection member 53, a second negative electrode protection member 54, a first bus bar 30, and a second bus bar 40.SELECTED DRAWING: Figure 2

Description

The present invention relates to a capacitor module unit.

The capacitor module unit has a capacitor module and a cover fixing the capacitor module. In the capacitor module, a plurality of capacitor cells are arranged in the plate thickness direction of the capacitor cells. A capacitor cell stores the power generated by the fuel cell.

For example, the unit structure of an electric double layer capacitor described in Patent Document 1 accommodates a capacitor module in a housing. In addition, in the unit structure of the electric double layer capacitor, the capacitor module is fixed to the housing in order to suppress vibration and impact on the capacitor module.

The housing integrally has a top plate, a bottom plate, a pair of side plates, and a rear plate. The housing is box-shaped with a front opening that opens forward. Ventilation holes are formed in the back plate. A plurality of capacitor modules accommodated in the housing have a positive terminal and a negative terminal on the front side. The plurality of capacitor modules are accommodated in the housing in a state in which the positive terminals and the negative terminals can be seen from the front opening. The plurality of capacitor modules are pressed against the back plate by a pair of upper and lower fixing brackets.

JP 2016-189364 A

In a capacitor module accommodated in a housing, it is necessary to protect the extraction electrodes such as the positive terminal and the negative terminal with a protective member without exposing them. However, the protective member may make it difficult for the heat generated in the capacitor cell to escape to the outside of the housing. Therefore, it is required to improve the cooling performance while protecting the extraction electrode.

A capacitor module unit for solving the above-mentioned problems comprises: a capacitor module in which a plurality of capacitor cells for storing electric power generated by a fuel cell are arranged in the plate thickness direction of the capacitor cells; a cover for fixing the capacitor modules; wherein one of the directions orthogonal to the plate thickness direction of the capacitor cell is the width direction of the capacitor module, and the capacitor module has a first side surface and a second side surface in the width direction. The cover does not cover the first side surface and the second side surface, and a part of the first side surface is electrically connected to the extraction electrode of the capacitor module and the extraction electrode. and a protective member that protects the extraction electrode.

According to this, the cover does not cover the first side surface and the second side surface of the capacitor module, and part of the first side surface is covered with the busbar and the protective member. Therefore, compared to the case where the cover covers the entire first side surface and the entire second side surface, and the case where the busbar and the protective member cover the entire first side surface, the Heat is easily released to the outside. Moreover, the heat generated in the capacitor cells is easily released to the outside from the second side surface as well. Therefore, it is possible to improve the cooling performance of the capacitor module while protecting the extraction electrode.

In the capacitor module unit, the first side surface and the second side surface may be two side surfaces having the largest areas among the plurality of side surfaces of the capacitor module.

According to this, compared to the case where the first side surface and the second side surface are not the two side surfaces having the largest area among the plurality of side surfaces of the capacitor module, the areas exposed to the outside on the first side surface and the second side surface becomes larger. Therefore, the heat generated in the capacitor cells is easily released to the outside.

In the capacitor module unit, the protection member includes a positive electrode protection member that protects the positive electrode of the extraction electrode and a negative electrode protection member that protects the negative electrode of the extraction electrode, and the positive electrode protection member and the negative electrode protection member may be separate.

According to this, the portion of the protective member that does not protect the positive electrode and the portion that does not protect the negative electrode can be made smaller than when the positive electrode protective member and the negative electrode protective member are integrated. Therefore, the area of the first side surface of the capacitor module that is exposed to the outside increases. Therefore, it is possible to further improve the cooling performance of the capacitor module.

In the capacitor module unit, the protective member has a main body portion that covers the extraction electrode and a fastened portion that is fastened to the cover by a fastening member, and the surface of the main body portion is covered with an insulating coating. and the surface of the fastened portion may not be covered with the insulating coating.

According to this, for example, when the fastening member is fastened to the part to be fastened, it is possible to prevent the torque from becoming difficult to generate due to the insulating film, as in the case where the part to be fastened is covered with an insulating film. . As a result, the fastened portion can be stably fastened to the cover.

In the capacitor module unit described above, the bus bar may include a bending portion.
According to this, since the busbar includes a bent portion, the cross-sectional area of the busbar can be increased compared to the case where the busbar extends only linearly. Therefore, the strength of the busbar can be improved.

In the capacitor module unit, the capacitor module has a module part extending in the plate thickness direction so as to straddle the plurality of capacitor cells in the plate thickness direction. At least a part of the bus bar may be arranged at a position overlapping the module part and the bus bar in a plate thickness direction.

According to this, the area of the first side surface of the capacitor module exposed to the outside is further increased compared to the case where the bus bar does not overlap the module component when viewed in the plate thickness direction of the bus bar. Therefore, it is possible to further improve the cooling performance of the capacitor module.

According to the present invention, it is possible to improve the cooling performance of the capacitor module while protecting the extraction electrodes.

4 is a perspective view showing a capacitor module unit; FIG. FIG. 4 is a front view showing a capacitor module unit; FIG. 4 is a rear view showing the capacitor module unit; 4 is a cross-sectional view along line 4-4 in FIG. 2; FIG.

An embodiment embodying a capacitor module unit will be described below with reference to FIGS. 1 to 4. FIG.
<Capacitor module unit>
As shown in FIG. 1 , the capacitor module unit 10 has a capacitor module 11 , a cover 20 fixing the capacitor module 11 , first bus bars 30 and second bus bars 40 as bus bars, and a protective member 50 .

Assuming that the capacitor module unit 10 is placed on a horizontal plane, the direction of gravity is indicated by the Z-axis, and the directions along the horizontal plane are indicated by the X-axis and the Y-axis. The X-axis, Y-axis, and Z-axis are orthogonal to each other. In the following description, the direction parallel to the Z-axis is also called the vertical direction Z, and the direction parallel to the X-axis is also called the horizontal direction X. A direction parallel to the Y-axis is also referred to as a depth direction Y. Therefore, the horizontal direction X is a direction orthogonal to both the depth direction Y and the vertical direction Z. FIG.

<Capacitor module>
As shown in FIGS. 2, 3, and 4, the capacitor module 11 includes a first capacitor module 11a and a second capacitor module 11b.

Each of the first capacitor module 11a and the second capacitor module 11b is configured by connecting a plurality of capacitor cells 12 in series. The first capacitor module 11a and the second capacitor module 11b are connected in series. Each of the plurality of capacitor cells 12 stores electric power generated by a fuel cell (not shown). 2 and 3, the first capacitor module 11a and the second capacitor module 11b are schematically shown by dashed lines.

Each of the plurality of capacitor cells 12 has a rectangular plate shape. The plate thickness direction of the capacitor cell 12 is defined as a plate thickness direction A. As shown in FIG. The plurality of capacitor cells 12 are arranged with the end faces in the plate thickness direction A facing each other. The plate thickness direction A of the capacitor cell 12 coincides with the horizontal direction X. As shown in FIG. The first capacitor module 11a and the second capacitor module 11b are arranged in the horizontal direction X. As shown in FIG. The capacitor module 11 has a rectangular parallelepiped shape. The longitudinal direction of the capacitor module 11 coincides with the horizontal direction X. As shown in FIG. One of the directions perpendicular to the plate thickness direction A is defined as the width direction W of the capacitor module 11 . The width direction W coincides with the depth direction Y.

The capacitor module 11 has, at both ends in the width direction W, a first side surface 111 and a second side surface 112 as two side surfaces having the largest area among the plurality of side surfaces. The first side surface 111 is composed of the side surface 111a of the first capacitor module 11a and the side surface 111b of the second capacitor module 11b. The second side surface 112 is composed of the side surface 112a of the first capacitor module 11a and the side surface 112b of the second capacitor module 11b.

<Cover>
As shown in FIGS. 1, 2, and 3, the cover 20 includes a bottom plate 21, a top plate 22, a first side plate 23, and a second side plate 24. As shown in FIG. The bottom plate 21, the top plate 22, the first side plate 23, and the second side plate 24 are rectangular plates. The bottom plate 21 and the top plate 22 face each other in the vertical direction Z. A long edge of the bottom plate 21 and a long edge of the top plate 22 extend in the horizontal direction X. As shown in FIG. A short edge of the bottom plate 21 and a short edge of the top plate 22 extend in the depth direction Y. As shown in FIG.

The first side plate 23 and the second side plate 24 face each other in the horizontal direction X. As shown in FIG. The long edge of the first side plate 23 and the long edge of the second side plate 24 extend in the vertical direction Z. As shown in FIG. The thickness direction of the first side plate 23 and the thickness direction of the second side plate 24 coincide with the horizontal direction X. As shown in FIG. Therefore, the thickness direction of the first side plate 23 and the thickness direction of the second side plate 24 match the thickness direction A. As shown in FIG. The cover 20 does not cover the first side 111 and the second side 112 .

The first side plate 23 vertically rises from the first end in the horizontal direction X of the bottom plate 21 . The second side plate 24 vertically rises from the second end in the horizontal direction X of the bottom plate 21 . The first side plate 23 and the second side plate 24 are integrated with the bottom plate 21 . The first side plate 23 and the second side plate 24 are separate from the top plate 22 .

A plurality of mounting members M are attached to the bottom plate 21 . Mounting member M is interposed between capacitor module unit 10 and an object to which capacitor module unit 10 is attached, thereby suppressing impact and vibration from the outside.

The first capacitor module 11 a and the second capacitor module 11 b are arranged in a space defined by the bottom plate 21 , top plate 22 , first side plate 23 and second side plate 24 . The top plate 22 has fixing pieces 25 at both ends in the horizontal direction X. As shown in FIG. The top plate 22 is fixed to the first side plate 23 and the second side plate 24 by screwing a fixing bolt 26 passing through the fixing piece 25 to the first side plate 23 and the second side plate 24 .

Top plate 22 and capacitor module 11 are connected by bolts 27 . Since top plate 22 is fixed to first side plate 23 and second side plate 24 , capacitor module 11 is fixed to cover 20 with bolts 27 .

As shown in FIG. 2, the top plate 22 has a first boss 22a, a second boss 22b, a third boss 22c, and a fourth boss 22d. Each of the first to fourth bosses 22 a to 22 d is a part for attaching the protective member 50 to the top plate 22 . Each of the first to fourth bosses 22a-22d has an internal thread 28. As shown in FIG. The internal thread 28 opens on the upper surfaces of the first to fourth bosses 22a to 22d. A fastening bolt 29 for fastening the protection member 50 to the first to fourth bosses 22a to 22d is screwed into each female screw 28. As shown in FIG.

The first to fourth bosses 22 a to 22 d are arranged along one of the pair of long edges of the top plate 22 . The first boss 22a is located closest to the first side plate 23 among the first to fourth bosses 22a to 22d. The second boss 22b is arranged near the center in the horizontal direction X. As shown in FIG. The first boss 22a is arranged near the first end in the longitudinal direction of the first capacitor module 11a, and the second boss 22b is arranged near the second end in the longitudinal direction of the first capacitor module 11a.

The fourth boss 22d is arranged near the center in the horizontal direction X and closer to the second side plate 24 than the second boss 22b. The third boss 22c is positioned closest to the second side plate 24 among the first to fourth bosses 22a to 22d. The fourth boss 22d is arranged near the first end in the longitudinal direction of the second capacitor module 11b, and the third boss 22c is arranged near the second end in the longitudinal direction of the second capacitor module 11b. Hereinafter, the dimension of the boss in the longitudinal direction of the top plate 22 is simply referred to as dimension.

The dimensions of the first boss 22a are the same as the dimensions of the second boss 22b. Also, the dimension of the fourth boss 22d is longer than the dimension of the first boss 22a and the dimension of the second boss 22b. The dimension of the third boss 22c is longer than the dimension of the fourth boss 22d.

<Extraction electrode>
Capacitor module 11 has extraction electrodes 13 . Specifically, the first capacitor module 11a has a first positive electrode 14a and a first negative electrode 14b. The second capacitor module 11b has a second positive electrode 15a and a second negative electrode 15b. The first positive electrode 14a is arranged near the second end in the longitudinal direction of the first capacitor module 11a, and the first negative electrode 14b is arranged near the first end in the longitudinal direction of the first capacitor module 11a. The second positive electrode 15a is arranged near the second end in the longitudinal direction of the second capacitor module 11b, and the second negative electrode 15b is arranged near the first end in the longitudinal direction of the second capacitor module 11b.

The first positive electrode 14a is arranged below the second boss 22b in the vertical direction Z. As shown in FIG. The first negative electrode 14b is arranged below the first boss 22a in the vertical direction Z. As shown in FIG. The second negative electrode 15b is arranged below the fourth boss 22d in the vertical direction Z. As shown in FIG. The second positive electrode 15a is arranged below the third boss 22c in the vertical direction Z. As shown in FIG.

A positive electrode connecting member P is connected to the second positive electrode 15a. A negative electrode connecting member Q is connected to the second negative electrode 15b. The positive electrode connection member P and the negative electrode connection member Q are connected to a load (not shown).

The first capacitor module 11a has a resin-made first module component 16a. The second capacitor module 11b has a resin second module component 16b. The first module component 16a and the second module component 16b each extend in the plate thickness direction A so as to straddle the plurality of capacitor cells 12 . The first module component 16a is provided to ensure insulation of the first capacitor module 11a. The second module component 16b is provided to ensure insulation of the second capacitor module 11b.

The first module component 16a covers substantially the entire horizontal direction X of the side surface 111a of the first capacitor module 11a. Further, the first module component 16a covers only the central portion in the vertical direction Z of the side surface 111a of the first capacitor module 11a. The second module component 16b covers substantially the entire horizontal direction X of the side surface 111b of the second capacitor module 11b. In addition, the second module component 16b covers only the central portion in the vertical direction Z of the side surface 111b of the second capacitor module 11b. Accordingly, the first modular part 16 a and the second modular part 16 b partially cover the first side surface 111 .

<Busbar>
Each of the first busbar 30 and the second busbar 40 is made of copper.
As shown in FIGS. 1 and 2 , the first bus bar 30 has a first negative electrode connection portion 31 , a second negative electrode connection portion 32 , and a first connection portion 33 . The first negative electrode connecting portion 31 is connected to the first negative electrode 14b of the first capacitor module 11a. The second negative electrode connecting portion 32 is connected to the second negative electrode 15b of the second capacitor module 11b. The first connection portion 33 connects the first negative electrode connection portion 31 and the second negative electrode connection portion 32 . Therefore, the first bus bar 30 electrically connects the first capacitor module 11a and the second capacitor module 11b. The first connection portion 33 is covered with an insulating layer (not shown). Each of the first negative electrode connection portion 31 and the second negative electrode connection portion 32 is not covered with an insulating layer.

The first connecting portion 33 has a first horizontal portion 33a and a first bent portion 33b. The first horizontal portion 33 a is a portion of the first connection portion 33 that extends horizontally from the first negative electrode connection portion 31 toward the second negative electrode connection portion 32 . The first bent portion 33 b is a portion of the first connection portion 33 that connects the first horizontal portion 33 a and the second negative electrode connection portion 32 .

The first bent portion 33 b is located farther from the first side surface 111 in the depth direction Y than the first negative electrode connection portion 31 , the first horizontal portion 33 a , and the second negative electrode connection portion 32 . In addition, the first bent portion 33 b is positioned further downward in the vertical direction Z than the first negative electrode connection portion 31 , the first horizontal portion 33 a and the second negative electrode connection portion 32 . The first bent portion 33b is bent away from the first negative electrode connection portion 31, the first horizontal portion 33a, and the second negative electrode connection portion 32 in the depth direction Y and the vertical direction Z. As shown in FIG. Therefore, first bus bar 30 includes a bending portion.

The second bus bar 40 has a first positive electrode connection portion 41 , a second positive electrode connection portion 42 , and a second connection portion 43 . The first positive electrode connecting portion 41 is connected to the first positive electrode 14a of the first capacitor module 11a. The second positive electrode connecting portion 42 is connected to the second positive electrode 15a of the second capacitor module 11b. The second connection portion 43 connects the first positive electrode connection portion 41 and the second positive electrode connection portion 42 . Therefore, the second bus bar 40 electrically connects the first capacitor module 11a and the second capacitor module 11b. The second connection portion 43 is covered with an insulating layer (not shown). Each of the first positive electrode connection portion 41 and the second positive electrode connection portion 42 is not covered with an insulating layer.

The second connecting portion 43 has a second horizontal portion 43a and a second bent portion 43b. The second horizontal portion 43 a is a portion of the second connection portion 43 that extends horizontally from the first positive electrode connection portion 41 toward the second positive electrode connection portion 42 . The second bent portion 43 b is a portion of the second connection portion 43 that connects the second horizontal portion 43 a and the second positive electrode connection portion 42 .

The second bent portion 43 b is located farther from the first side surface 111 in the depth direction Y than the first positive electrode connection portion 41 , the second horizontal portion 43 a and the second positive electrode connection portion 42 . In addition, the second bent portion 43b is positioned further downward in the vertical direction Z than the first positive electrode connection portion 41, the second horizontal portion 43a, and the second positive electrode connection portion . The second bent portion 43b is bent away from the first positive electrode connection portion 41, the second horizontal portion 43a, and the second positive electrode connection portion 42 in the depth direction Y and the vertical direction Z. As shown in FIG. Therefore, second bus bar 40 includes a bending portion.

When viewing the first busbar 30 in the plate thickness direction of the first busbar 30, the first connection portion 33 of the first busbar 30 and the second connection portion 43 of the second busbar 40 intersect.
The first connection portion 33 and the second connection portion 43 are arranged at positions where a portion of the first connection portion 33 and a portion of the second connection portion 43 overlap in the depth direction Y. As shown in FIG. Therefore, the first busbar 30 and the second busbar 40 three-dimensionally intersect.

When viewing the first bus bar 30 in the plate thickness direction of the first bus bar 30, the first bus bar 30 is arranged at a position where a portion of the first bus bar 30 overlaps a portion of the first module component 16a and the second module component 16b. When viewing the second bus bar 40 in the plate thickness direction of the second bus bar 40, the second bus bar 40 is arranged at a position where a portion of the second bus bar 40 overlaps a portion of the second module component 16b.

The first bus bar 30 covers part of the side surface 111a of the first capacitor module 11a and part of the side surface 111b of the second capacitor module 11b.
The second bus bar 40 covers part of the side surface 111b of the second capacitor module 11b and part of the side surface 111a of the first capacitor module 11a.

As described above, a portion of the first busbar 30 overlaps a portion of the first module component 16a, a portion of the second module component 16b, and a portion of the second busbar 40. As shown in FIG. A portion of the second bus bar 40 overlaps a portion of the second module component 16 b and a portion of the first bus bar 30 . Therefore, the components arranged on the first side surface 111 of the capacitor module 11 are arranged to overlap in the depth direction Y as much as possible.

<Protective material>
Capacitor module 11 has protective member 50 . The protective member 50 includes a first positive electrode protective member 51 , a first negative electrode protective member 52 , a second positive electrode protective member 53 , and a second negative electrode protective member 54 .

The first positive electrode protection member 51 covers and protects a part of the first positive electrode 14 a and the first positive electrode connecting portion 41 . The first negative electrode protection member 52 covers and protects the first negative electrode 14 b and a part of the first negative electrode connection portion 31 . The second positive electrode protection member 53 covers and protects the second positive electrode 15a, the second positive electrode connecting portion 42, and part of the positive electrode connecting member P. As shown in FIG. The second negative electrode protection member 54 covers and protects part of the second negative electrode 15b, the second negative electrode connection portion 32, and the negative electrode connection member Q. As shown in FIG. The first positive electrode protection member 51 and the first negative electrode protection member 52 are separate bodies. The second positive electrode protection member 53 and the second negative electrode protection member 54 are separate members.

The first positive electrode protection member 51, the first negative electrode protection member 52, the second positive electrode protection member 53, and the second negative electrode protection member 54 have different sizes, but have a common configuration. Therefore, the configurations of the first positive electrode protection member 51 , the first negative electrode protection member 52 , the second positive electrode protection member 53 , and the second negative electrode protection member 54 will be described as the configuration of the protection member 50 . In the first positive electrode protection member 51 , the first negative electrode protection member 52 , the second positive electrode protection member 53 , and the second negative electrode protection member 54 , the same member number is assigned to the common configuration and will be described.

As shown in FIGS. 1 and 4 , the protection member 50 has a body portion 60 and a fastened portion 70 . Moreover, the protective member 50 has an insulating coating 80 . The protective member 50 is made of metal except for the insulating coating 80 .

<Body part>
The body portion 60 has a rectangular box shape. The body portion 60 has an upper plate 61 , a protective plate 62 , a first cover plate 63 and a second cover plate 64 .

The protection plate 62 has a square plate shape. The protection plate 62 has an upper edge 62a, a first side edge 62b extending from a first end of the upper edge 62a, a second side edge 62c extending from a second end of the upper edge 62a, and a lower edge 62d.

The upper plate 61 extends from the upper edge 62a of the protective plate 62. As shown in FIG. The upper plate 61 has a square plate shape. The first cover plate 63 extends from the first side edge 62b of the protection plate 62. As shown in FIG. The second cover plate 64 extends from the second side edge 62c of the protection plate 62. As shown in FIG. The first cover plate 63 and the second cover plate 64 face each other. The direction in which the first cover plate 63 and the second cover plate 64 face each other coincides with the horizontal direction X. As shown in FIG.

Each of the upper plate 61, the first cover plate 63, and the second cover plate 64 extends from the protection plate 62 in the same direction. The upper plate 61 , the protective plate 62 , the first cover plate 63 , and the second cover plate 64 define an internal space S of the body portion 60 . The direction in which the upper plate 61, the first cover plate 63, and the second cover plate 64 extend from the protection plate 62 is defined as an extension direction. This extending direction coincides with the depth direction Y. The dimension in the extension direction of the upper plate 61 is larger than the dimension in the extension direction of the first cover plate 63 and the second cover plate 64 .

<Fastening part>
The fastened portion 70 is provided at the leading end portion of the upper plate 61 in the extending direction. A through hole 71 is provided in the fastened portion 70 . The through hole 71 penetrates the upper plate 61 in the plate thickness direction. A fastening bolt 29 as a fastening member to be screwed into the internal threads 28 of the first to fourth bosses 22a to 22d is inserted through the through hole 71. As shown in FIG. As a result, the fastened portion 70 is fastened to the cover 20 by the fastening bolt 29 .

The fastened portion 70 is a portion sandwiched between the head portion 29a of the fastening bolt 29 and the first to fourth bosses 22a to 22d. The fastened portion 70 is also a portion with which the head portion 29a of the fastening bolt 29 contacts. The dimension of the fastened portion 70 in the extending direction is slightly larger than the dimension of the head portion 29 a of the fastening bolt 29 .

<Insulating coating>
The insulating coating 80 is provided only on the surface of the body portion 60 among the surfaces of the protective member 50 . Therefore, the surface of the body portion 60 is covered with the insulating coating 80 . In addition, the surface of the fastened portion 70 is not covered with the insulating coating 80 . The insulating coating 80 is made of polyethylene, for example.

The dimension of the protection member 50 in the opposing direction will be described. The dimension of the protection member 50 in the opposing direction is simply referred to as the width dimension of the protection member 50 .
As shown in FIG. 2, the width dimension of the first positive electrode protection member 51 is substantially the same as the dimension of the first boss 22a. The width dimension of the first negative electrode protection member 52 is substantially the same as the dimension of the second boss 22b. The width dimension of the second positive electrode protection member 53 is substantially the same as the dimension of the third boss 22c. The width dimension of the second negative electrode protection member 54 is substantially the same as the dimension of the fourth boss 22d.

The first positive electrode protection member 51 partially covers the first positive electrode 14 a and the first positive electrode connecting portion 41 . For this reason, the width dimension of the first positive electrode protection member 51 is set to be large enough to partially cover the first positive electrode 14 a and the first positive electrode connecting portion 41 . In addition, the first negative electrode protection member 52 protects the first negative electrode 14 b and a part of the first negative electrode connecting portion 31 . For this reason, the width dimension of the first negative electrode protection member 52 is set to be large enough to partially cover the first negative electrode 14 b and the first negative electrode connecting portion 31 .

The second positive electrode protection member 53 partially covers the second positive electrode 15a, the second positive electrode connecting portion 42, and the positive electrode connecting member P. As shown in FIG. Therefore, the width dimension of the second positive electrode protection member 53 is set to be large enough to partially cover the second positive electrode 15a, the second positive electrode connecting portion 42, and the positive electrode connecting member P.

The second negative electrode protection member 54 partially covers the second negative electrode 15b, the second negative electrode connection portion 32, and the negative electrode connection member Q. As shown in FIG. For this reason, the second negative electrode protection member 54 is set to have a size sufficient to cover the second negative electrode 15b, the second negative electrode connection portion 32, and part of the negative electrode connection member Q. As shown in FIG.

The second positive electrode protection member 53 partially covers the connection member P for positive electrode. The positive electrode connection member P protrudes in the horizontal direction X and the vertical direction Z from the second positive electrode 15a. Further, the second negative electrode protection member 54 partially covers the connection member Q for negative electrode. The negative electrode connecting member Q protrudes in the horizontal direction X from the second negative electrode 15b. Therefore, the width dimension of the second positive electrode protection member 53 and the width dimension of the second negative electrode protection member 54 are the width dimension of the first positive electrode protection member 51 that does not cover the positive electrode connection member P and the negative electrode connection member Q, and It is larger than the width dimension of the first negative electrode protection member 52 .

In addition, the dimension in the horizontal direction X of the connecting member P for positive electrode is larger than the dimension in the horizontal direction X of the connecting member Q for negative electrode. Therefore, the width dimension of the second positive electrode protection member 53 covering the positive electrode connection member P is larger than the width dimension of the second negative electrode protection member 54 .

<Action of Embodiment>
Next, the operation of this embodiment will be described.
When the capacitor module 11 is driven, heat is generated in each capacitor cell 12 . Heat generated in the capacitor cell 12 is released to the outside through most of the first side surface 111 and the entire surface of the second side surface 112 .

<Effects of Embodiment>
In the above embodiment, the following effects can be obtained.
(1) The cover 20 does not cover the first side surface 111 and the second side surface 112 of the capacitor module 11, and a part of the first side surface 111 covers the first busbar 30, the second busbar 40, and the first positive electrode protection. It is covered with the member 51 , the first negative electrode protection member 52 , the second positive electrode protection member 53 , and the second negative electrode protection member 54 . Therefore, when the cover 20 covers the entire surface of the first side surface 111 and the entire surface of the second side surface 112 , the first bus bar 30 , the second bus bar 40 and the protective member 50 cover the entire surface of the first side surface 111 . Heat generated in the capacitor cell 12 is more likely to be released to the outside than in the case where the capacitor cell 12 is provided. Also, the heat generated in the capacitor cell 12 is easily released to the outside from the entire surface of the second side surface 112 . Therefore, while protecting the first positive electrode 14a, the first negative electrode 14b, the second positive electrode 15a, and the second negative electrode 15b by the protective member 50, the cooling performance of the capacitor module 11 can be improved.

(2) The first side surface 111 and the second side surface 112 are two side surfaces having the largest areas among the plurality of side surfaces of the capacitor module 11 . According to this, the area of the capacitor module 11 that is exposed to the outside is increased compared to the case where the side surfaces other than the two side surfaces having the largest area among the plurality of side surfaces of the capacitor module 11 are not covered with the cover 20 . . Therefore, the heat generated in the capacitor cell 12 is easily released to the outside. Therefore, the cooling performance of capacitor module 11 can be further improved.

(3) The first positive electrode protection member 51 and the first negative electrode protection member 52 are separate members, and the second positive electrode protection member 53 and the second negative electrode protection member 54 are separate members. According to this, compared to the case where the first positive electrode protection member 51 and the first negative electrode protection member 52 are integrated, and the second positive electrode protection member 53 and the second negative electrode protection member 54 are integrated, the protection member Of 50, the portion that does not protect the first positive electrode 14a, the portion that does not protect the first negative electrode 14b, the portion that does not protect the second positive electrode 15a, and the portion that does not protect the second negative electrode 15b can be reduced. Therefore, the area of first side surface 111 of capacitor module 11 exposed to the outside increases. Therefore, the cooling performance of capacitor module 11 can be further improved.

(4) The surface of the body portion 60 is covered with the insulating coating 80 , and the surface of the fastened portion 70 is not covered with the insulating coating 80 . According to this, for example, when the fastening bolt 29 is fastened to the to-be-fastened part 70, as in the case where the to-be-fastened part 70 is covered with the insulating film 80, the insulating film 80 makes it difficult to generate torque. can be suppressed. As a result, the fastened portion 70 can be stably fastened to the cover 20 .

(5) The first busbar 30 includes a first bent portion 33b, and the second busbar 40 includes a second bent portion 43b. Therefore, the cross-sectional area of the first bus bar 30 and the cross-sectional area of the second bus bar 40 can be increased compared to the case where the first bus bar 30 and the second bus bar 40 extend only linearly. Therefore, the strength of the first busbar 30 and the strength of the second busbar 40 can be improved.

(6) The first bus bar 30 and the second bus bar 40 are arranged at positions partially overlapping in the depth direction Y with the first module component 16a and the second module component 16b. According to this, when the first bus bar 30 and the second bus bar 40 are viewed in the depth direction Y, the first bus bar 30 does not overlap the first module component 16a, and the second bus bar 40 overlaps the second module component. 16b, the exposed area of the first side surface 111 of the capacitor module 11 is further increased. Therefore, the cooling performance of capacitor module 11 can be further improved.

(7) The cover 20 does not cover the entire surface of the first side surface 111 and the entire surface of the second side surface 112 . According to this, the configuration of the cover 20 can be simplified compared to the case where the cover 20 covers part of the first side surface 111 or part of the second side surface 112 . Therefore, the cost can be reduced compared to the case where the cooling performance is improved by providing a fan for cooling, for example.

(8) The first busbar 30 and the second busbar 40 three-dimensionally intersect. According to this, a portion of the first busbar 30 and a portion of the second busbar 40 can be arranged at positions overlapping in the depth direction Y. As shown in FIG. Therefore, the area of the first side surface 111 exposed to the outside can be increased. Therefore, the cooling performance of capacitor module 11 can be further improved.

<Change example>
It should be noted that the above embodiment can be implemented with the following modifications. The above embodiments and the following modifications can be combined with each other within a technically consistent range.

(circle) the capacitor module 11 does not need to be provided with the 1st module component 16a and the 2nd module component 16b.
O The capacitor module 11 may include other module parts arranged in the vertical direction Z in addition to the first module part 16a and the second module part 16b.

○ Looking at the first bus bar 30 and the second bus bar 40 in the depth direction Y, the first bus bar 30 does not have to overlap with the first module component 16a, and the second bus bar 40 does not have to overlap with the second module component 16b. They do not have to overlap.

(circle) the 1st bus-bar 30 may be extended only linearly without including the 1st bending part 33b. The second bus bar 40 may extend only linearly without including the second bent portion 43b.
○ Looking at the first busbars 30 and the second busbars 40 in the depth direction Y, the first busbars 30 may all overlap the first module parts 16a, or the second busbars 40 may all overlap the second module parts 16b. may overlap with

(circle) the 1st bus-bar 30 and the 2nd bus-bar 40 do not need to intersect three-dimensionally.
(circle) the surface of the to-be-fastened part 70 may be coat|covered with the insulating film 80. FIG.
(circle) the protection member 50 does not need to have the insulation film 80. FIG.

(circle) the arrangement|positioning order in the horizontal direction X of the 1st positive electrode 14a and the 1st negative electrode 14b in the 1st capacitor module 11a is arbitrary. The arrangement order in the horizontal direction X of the second positive electrode 15a and the second negative electrode 15b in the second capacitor module 11b is arbitrary. In this case, the arrangement order of the first positive electrode protection member 51 and the first negative electrode protection member 52 in the horizontal direction X is arbitrary, and the arrangement of the second positive electrode protection member 53 and the second negative electrode protection member 54 in the horizontal direction X is arbitrary. The order is arbitrary.

O Although the first positive electrode protection member 51, the first negative electrode protection member 52, the second positive electrode protection member 53, and the second negative electrode protection member 54 are respectively fastened to the top plate 22, the present invention is not limited to this.
(circle) the 1st positive electrode protection member 51 and the 1st negative electrode protection member 52 may be integrated. Also, the second positive electrode protection member 53 and the second negative electrode protection member 54 may be integrated.

O The first side plate 23 and the second side plate 24 may be separate from the bottom plate 21 .
(circle) the cover 20 may be comprised only by the baseplate 21, for example. Alternatively, the cover 20 may be composed of a bottom plate 21, a first side plate 23, and a second side plate 24, for example.

O The first side surface 111 and the second side surface 112 may not be the side surfaces having the largest area as long as they are side surfaces located at both ends in the width direction W of the capacitor module 11 .
(circle) the shape of the 1st bus-bar 30 and the 2nd bus-bar 40 is not specifically limited.

(circle) the number of the capacitor cells 12 which comprise the 1st capacitor module 11a is not specifically limited. Also, the number of capacitor cells 12 forming the second capacitor module 11b is not particularly limited.

(circle) the capacitor module 11 is not restricted to the structure which has the 1st capacitor module 11a and the 2nd capacitor module 11b. For example, the capacitor module 11 may be composed of three or more capacitor modules.

(circle) the capacitor module 11 may be comprised only by the 1st capacitor module 11a.

DESCRIPTION OF SYMBOLS 10... Capacitor module unit 11... Capacitor module 12... Capacitor cell 13... Lead electrode 20... Cover 29... Fastening bolt as a fastening member 30... First bus bar as a bus bar 40... Second bus bar Bus bar 50 Protective member 51 First positive electrode protective member 52 First negative electrode protective member 53 Second positive electrode protective member 54 Second negative electrode protective member 60 Body portion 70 Fastened portion 80... Insulating coating, 111... First side surface, 112... Second side surface, A... Plate thickness direction, W... Width direction.

Claims (6)

a capacitor module in which a plurality of capacitor cells storing electric power generated by the fuel cell are arranged in the plate thickness direction of the capacitor cells;
a cover for fixing the capacitor module, the capacitor module unit comprising:
Assuming that one of the directions perpendicular to the plate thickness direction of the capacitor cell is the width direction of the capacitor module,
The capacitor module has a first side surface and a second side surface at both ends in the width direction,
The cover does not cover the first side surface and the second side surface,
A portion of the first side includes:
a lead electrode of the capacitor module;
a bus bar electrically connected to the extraction electrode;
and a protective member that protects the extraction electrode. 2. The capacitor module unit of claim 1, wherein the first side and the second side are two sides having the largest areas among the plurality of sides of the capacitor module. The protective member is
a positive electrode protection member that protects the positive electrode of the extraction electrode;
a negative electrode protection member that protects the negative electrode of the extraction electrode,
3. The capacitor module unit according to claim 1, wherein the positive electrode protection member and the negative electrode protection member are separate members. The protective member is
a main body covering the extraction electrode;
a fastened portion fastened to the cover by a fastening member;
The surface of the main body is covered with an insulating coating,
The capacitor module unit according to any one of claims 1 to 3, wherein the surface of the portion to be fastened is not covered with the insulating film. The capacitor module unit according to any one of claims 1 to 4, wherein the bus bar includes a bending portion. The capacitor module has a module component extending in the plate thickness direction so as to straddle the plurality of capacitor cells in the plate thickness direction,
6. The bus bar according to any one of claims 1 to 5, wherein when viewed in the thickness direction of the bus bar, the bus bar at least partially overlaps the module part and the bus bar in the thickness direction. The capacitor module unit according to item 1.

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