JP7115421B2 - power storage device - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a power storage device, and more particularly to a power storage device mounted on a vehicle.

As a conventional battery pack, Japanese Patent Application Laid-Open No. 2016-153279 (Patent Document 1) discloses a structure including an air intake duct for sucking air for cooling a battery module and a cover member covering the air inlet of the air intake duct. It is

The cover member has an engaging claw for engaging with a flange provided around the intake port. The cover member is fixed to the air intake duct by engaging the engaging claw with the through hole provided in the flange portion. Also, the flange portion of the intake duct is fixed to the cross member with bolts.

JP 2016-153279 A

From the viewpoint of space, the air intake duct may be fixed to the case housing the power storage module. In such a case, if the intake duct is fixed to the case using the locking claws or bolts described in Patent Document 1, the intake duct rattles due to vibrations of the vehicle, etc., and an abnormal noise is generated. Sometimes.

The present disclosure has been made in view of the above problems, and an object of the present disclosure is to suppress abnormal noise generated by a case that accommodates a power storage module inside and an air intake duct fixed to the case. An object of the present invention is to provide a power storage device capable of

A power storage device according to the present disclosure includes a case that houses a power storage module, and an intake duct for taking outside air into the inside of the case. The case includes a flange portion for fixing the intake duct. The air intake duct includes a pair of hook portions engaged with the flange portion, and a support member arranged to face the flange portion and supporting the pair of hook portions. The flange portion is provided with through holes through which the pair of hook portions pass. The support member includes a protruding portion that protrudes toward the flange portion located around the through hole. Each of the pair of hook portions is flexibly deformable and includes an insertion portion inserted into the through-hole and a retaining portion provided on a distal end side of the insertion portion. The portion of the flange portion positioned around the through-hole is positioned between the projecting portion and the retaining portion. The outer peripheral surface of the fitting portion has a taper that slopes toward the wall surface of the flange portion as it goes from the support member toward the through hole in the axial direction of the through hole.

In the power storage device, the flange portion positioned around the through hole is positioned between the protruding portion and the retaining portion, so that the moving range of the hook portion in the axial direction of the through hole is considerably reduced. can be reduced.

Further, the fitting portions provided in the pair of hook portions so as to be flexibly deformable have a taper that inclines toward the wall surface of the flange portion from the support member toward the through hole in the axial direction of the through hole. Therefore, a force can be applied in the insertion direction of the hook portion by the elastic restoring force of the insertion portion. As a result, it is possible to increase the frictional force between the pair of hooks and the wall surface of the flange portion that defines the through hole, so that even when the vehicle vibrates, the pair of hooks can be prevented from rattling. can. As a result, it is possible to suppress the generation of noise. Further, even when the pair of hook portions move in the axial direction of the through hole, the insertion portion of the pair of hook portions deforms so as to absorb vibration, thereby suppressing the generation of abnormal noise. can.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide an electricity storage device capable of suppressing abnormal noise generated by a case that accommodates an electricity storage module therein and an intake duct for drawing air into the case.

1 is a schematic perspective view of a power storage device according to an embodiment; FIG. 1 is a top view of a power storage device according to an embodiment; FIG. 3 is an enlarged view of an area surrounded by line III shown in FIG. 2; FIG. 4 is a cross-sectional view taken along line IV-IV shown in FIG. 3; FIG.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments shown below, the same or common parts are denoted by the same reference numerals in the drawings, and the description thereof will not be repeated.

FIG. 1 is a schematic perspective view of a power storage device according to an embodiment. FIG. 2 is a top view of the power storage device according to the embodiment. In addition, in FIG. 1, for the sake of convenience, the case that accommodates the power storage module is indicated by a dashed line. A power storage device 100 according to an embodiment will be described with reference to FIGS. 1 and 2. FIG.

Power storage device 100 according to the embodiment is mounted in a vehicle such as a hybrid vehicle that can run using the power of at least one of a motor and an engine, or an electric vehicle that runs with driving force obtained from electrical energy. .

As shown in FIG. 1 , the power storage device 100 includes a case 10 , multiple power storage modules 20 , and an intake duct 30 .

Case 10 accommodates a plurality of power storage modules 20 . Further, the case 10 accommodates a body portion 31 that constitutes part of the intake duct 30 .

Case 10 includes an upper case 11 and a lower case 12 . The upper case 11 has a substantially box-like shape that opens downward. The lower case 12 has a generally box-like shape that opens upward.

The upper case 11 has a flange around the opening. Similarly, the lower case 12 also has a flange portion 121 (see FIG. 2) around the opening. In a state in which the flange portion of the upper case 11 and the flange portion 121 of the lower case 12 are put together, the flange portions are fastened together by a fastening member or the like. Thereby, the upper case 11 is fixed to the lower case 12 .

The lower case 12 is provided so as to be larger than the upper case 11 in the DR1 direction in the drawing. One end of the lower case 12 protrudes outward from one end of the upper case 11 in the DR1 direction in the drawing.

The plurality of power storage modules 20 are arranged side by side. In FIG. 1, two power storage modules 20 are shown as an example. The number of power storage modules 20 is not limited to two, and may be singular or three or more.

The power storage module 20 includes a plurality of power storage cells 21 arranged side by side in a predetermined arrangement direction, and a plurality of spacers 22 arranged side by side in the arrangement direction. The plurality of storage cells 21 and the plurality of spacers 22 are arranged alternately.

As the electric storage cell 21, for example, a single battery can be adopted. A cell is, for example, a secondary battery such as a nickel-metal hydride battery or a lithium-ion battery. A cell has, for example, a rectangular shape. The secondary battery may use a liquid electrolyte or may use a solid electrolyte. Note that the storage cell 21 may be a unit capacitor configured to be chargeable and dischargeable.

Each of the plurality of spacers 22 is arranged in the gap between the two energy storage cells 21 adjacent to each other. Spacer 22 forms a path along which air sucked from intake duct 30 flows.

The intake duct 30 is for taking outside air into the case 10 . Air intake duct 30 includes a body portion 31 and a cover member 32 .

The body portion 31 has an intake port 31a for sucking outside air at one end in the DR1 direction in the figure. One end side of the main body portion 31 is arranged in the lower case 12 at a portion that protrudes outward from one end of the upper case 11 . One end of the body portion 31 protrudes slightly above the opening surface of the lower case 12 . The intake port 31a is arranged to face upward.

One end side of the body portion 31 has an attachment portion 50 (see FIG. 2) that protrudes outward from the outer peripheral surface of the body portion 31 . The body portion 31 is fixed to the flange portion 121 of the lower case 12 by the mounting portion 50 .

The other end side of the body portion 31 is branched into two. Two other ends of the branched body portion 31 are connected to the power storage modules 20 respectively.

The cover member 32 is provided so as to cover the intake port 31a. Specifically, the cover member 32 covers the intake port 31a from above. The cover member 32 is fixed to the body portion 31 .

FIG. 3 is an enlarged view of a region surrounded by line III shown in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV shown in FIG. The mounting structure of the intake duct 30 will be described with reference to FIGS. 3 and 4. FIG.

As shown in FIGS. 3 and 4, the intake duct 30 includes a support member 33 and a pair of hook portions 34. As shown in FIG. The support member 33 and the pair of hook portions 34 constitute the attachment portion 50 described above.

The support member 33 supports the pair of hook portions 34 . The support member 33 is provided so as to protrude outward from the outer peripheral surface of the body portion 31 . The support member 33 is provided so as to be substantially parallel to the flange portion 121 . The support member 33 is arranged so as to face the flange portion 121 . The support member 33 is arranged above the flange portion 121 .

The support member 33 includes a protruding portion 37 protruding toward the flange portion 121 of the portion located in the through hole 121a. The projecting portions 37 are provided at both ends of the support member 33 in the direction in which the pair of hook portions 34 are arranged. The projecting portion 37 is provided outside the pair of hook portions 34 .

A pair of hook portions 34 are engaged with the flange portion 121 . A pair of hook portions 34 are provided so as to extend downward from the back surface of the support member 33 . The pair of hook portions 34 pass through through holes 121 a provided in the flange portion 121 .

The pair of hook portions 34 includes an insertion portion 35 and a retaining portion 36 . The fitting portion 35 is provided so as to be flexibly deformable, and is fitted into a through hole 121 a provided in the flange portion 121 . The outer peripheral surface of the fitting portion 35 has a taper 35a that is inclined toward the wall surface of the flange portion 121 that defines the through hole 121a as it goes from the support member 33 toward the through hole 121a in the axial direction of the through hole 121a.

The retaining portion 36 is provided on the tip (lower end) side of the insertion portion 35 . The retaining portion 36 is formed to be larger than the lower end of the fitting portion 35 . The retainer portion 36 has an abutment surface 36 a facing the flange portion 121 . The abutment surfaces 36 a abut against the flange portion 121 to prevent the pair of hook portions 34 from slipping out of the through holes 121 a of the flange portion 121 . The abutment surface 36 a is positioned directly below the flange portion 121 .

A portion of the flange portion 121 positioned around the through hole 121 a is positioned between the projection portion 37 and the retainer portion 36 . The tip of the protruding portion 37 and the abutment surface 36 a of the retaining portion 36 are arranged close to the flange portion 121 . As a result, the moving range of the hook portion 34 in the axial direction can be considerably reduced.

Further, in the power storage device 100, the inserting portion 35 provided in the pair of hook portions 34 so as to be flexibly deformable has the tapered taper 35a as described above. Therefore, force can be applied in the insertion direction of the hook portion 34 by the elastic restoring force of the fitting portion 35 . As a result, the frictional force between the pair of hook portions 34 and the wall surface of the flange portion 121 defining the through hole 121a can be increased, and even when the vehicle vibrates, the pair of hook portions 34 are prevented from rattling. can be suppressed. As a result, noise generated by the case 10 and the intake duct 30 can be suppressed.

Further, even when the pair of hooks 34 move in the axial direction of the through-hole 121a, the inserting portions 35 of the pair of hooks 34 are deformed so as to absorb the vibrations, thereby allowing the case 10 and the air intake to move. It is possible to suppress the generation of noise caused by the duct 30 .

As described above, in power storage device 100 according to the embodiment, abnormal noise generated by case 10 housing power storage module 20 therein and intake duct 30 fixed to case 10 can be suppressed. can.

As described above, the embodiments disclosed this time are illustrative in all respects and are not restrictive. The scope of the present invention is indicated by the scope of claims, and includes all modifications within the meaning and scope of equivalence to the scope of claims.

10 case, 11 upper case, 12 lower case, 20 power storage module, 21 power storage cell, 22 spacer, 30 intake duct, 31 main body, 31a intake port, 32 cover member, 33 support member, 34 hook portion, 35 insertion portion, 35a Taper 36 Retaining portion 36a Collision surface 37 Protruding portion 50 Mounting portion 100 Power storage device 121 Flange 121a Through hole.

Claims (1)

a case that accommodates the power storage module;
an intake duct for taking outside air into the interior of the case,
the case includes a flange portion for fixing the intake duct,
The air intake duct includes a pair of hook portions that engage with the flange portion, and a support member arranged to face the flange portion and supporting the pair of hook portions,
The flange portion is provided with through holes through which the pair of hook portions pass,
The support member includes a protruding portion protruding toward the flange portion located around the through hole,
each of the pair of hook portions includes an insertion portion inserted into the through-hole and a retaining portion provided on a distal end side of the insertion portion, which is provided to be flexibly deformable;
the flange portion located around the through-hole is located between the projecting portion and the retaining portion;
The power storage device, wherein an outer peripheral surface of the insertion portion has a taper that is inclined toward a wall surface of the flange portion that defines the through hole as it goes from the support member toward the through hole in the axial direction of the through hole. .

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