JP5950101B2 - Electric vehicle seal structure - Google Patents

Description

  The present invention relates to a seal structure for an electric vehicle, and more particularly to a seal structure for a service plug operation hole.

The electric vehicle is equipped with a battery unit that stores electric power and supplies electric power to the electric motor. And the battery unit is arrange | positioned in one floor lower part in order to ensure the volume of the compartment or cargo compartment of an electric vehicle.
The battery case of such a battery unit has a service plug opening (service plug) for operating a service plug operation lever provided in the battery unit from the vehicle interior side when performing maintenance or the like of the battery unit. Operation hole) is provided (Patent Document 1).

JP 2009-83601 A

  In the battery unit of Patent Document 1, a cap member that covers the service plug operation hole is attached to the floor panel after the battery unit is mounted in order to protect the operator from electric shock or the like when the vehicle is assembled. In addition, a bellows-like boot member (seal member) is provided between the battery unit and the floor panel to prevent water and dust from entering the battery unit from outside the vehicle. The floor panel side sealing member is attached by fitting the floor panel into an attachment groove formed in the upper part of the sealing member.

  When such a battery unit of Patent Document 1 is applied to a vehicle in which a vehicle component such as a parking brake cable is disposed above the service plug operation hole of the battery unit after being mounted on a vehicle, the cap member is a vehicle component. It is necessary to move the cap member laterally between the vehicle component and the floor panel so that the cap member does not come into contact with the floor panel.

However, if the cap member is moved laterally between the vehicle component and the floor panel and attached to the floor panel, the cap member and the seal member may come into contact with each other, and the seal member may come off the floor panel.
Therefore, when the sealing member is detached from the floor panel in this manner, water or dust may enter the battery unit, which is not preferable.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a seal structure for an electric vehicle that can prevent water and the like from entering the battery unit. .

  To achieve the above object, the seal structure for an electric vehicle according to claim 1 has an opening in which a seal member that communicates with the inside and outside of the housing and is elastically deformed to maintain a sealed state when mounted on a vehicle is provided. A battery unit, a floor panel that communicates with the vehicle interior at a position facing the opening, and is formed with a seal member mounting hole to which the upper portion of the seal member is fitted and mounted, and covers the seal member mounting hole A cap member fixed to the floor panel, wherein the battery unit is disposed at a lower portion of the floor panel, wherein the cap member and the seal member are disposed when the cap member is attached. A drop-off prevention means for preventing contact is provided.

Further, in the seal structure of the electric vehicle according to claim 2, in the claim 1, the drop-off prevention means is a drop-off prevention member formed so as to cover an upper end portion of the seal member, and the drop-off prevention member includes: After the seal member is mounted in the seal member mounting hole, the seal member is disposed so as to cover an upper end portion of the seal member.
According to a third aspect of the present invention, there is provided a sealing structure for an electric vehicle according to the first or second aspect, wherein the drop-off prevention member is provided on the side of the sealing member that is in the insertion direction of the cap member when the cap member is attached. The dropout prevention member is formed to cover an upper end portion, and a fixing portion for fixing the dropout prevention member to the floor panel is formed.

According to a seal structure for an electric vehicle according to a fourth aspect of the present invention, in the first aspect, the drop prevention means is configured such that the height of the portion of the floor panel where the seal member insertion hole is formed is the height of the other portion. In contrast, it is characterized by being set low.

  According to the first aspect of the present invention, the cap member and the seal member are prevented from coming off when the cap member is attached. For example, a vehicle component member such as a parking brake cable is provided above the seal member attachment hole. When the cap member is attached by moving the cap member laterally between the floor panel and the vehicle component member so as to avoid the vehicle component member in the electric vehicle provided with the contact between the cap member and the seal member. It is possible to prevent the seal member from being removed from the seal member mounting hole by being pushed by the cap member.

Therefore, intrusion of water or the like into the battery unit can be prevented.
According to the second aspect of the present invention, the drop-off preventing member is disposed so as to cover the upper end portion of the seal member after the seal member is mounted in the seal member mounting hole. And the upper end of the seal member can be prevented, and the seal member can be prevented from coming off from the seal member mounting hole, so that intrusion of water or the like into the battery unit can be prevented.

  According to the invention of claim 3, the drop-off prevention member is formed so as to cover the upper end portion of the seal member on the side in which the cap member is inserted when the cap member is attached. A fixing portion for fixing the prevention member to the floor panel is formed. By fixing the fixing portion to the floor panel, the drop-off prevention member can be prevented from falling off when the cap member is attached. Moreover, the drop-off prevention member is formed so as to cover the upper part of the seal member on the side in which the cap member is inserted, and the cost increase due to the drop-off prevention member can be suppressed by limiting the shape of the drop-off prevention member. .

According to the invention of claim 4 , the height of the portion of the floor panel where the seal member insertion hole is formed is set lower than the height of other portions, and the seal member is attached when the cap member is attached. Therefore, it is possible to prevent the seal member from being detached from the seal member mounting hole. Moreover, since it is not necessary to use a drop-off prevention member, an increase in cost can be suppressed.

It is the schematic of the service plug operation hole periphery part of the electric vehicle which concerns on 1st Example of this invention. It is a top view of the service plug operation hole to which the seal structure of the electric vehicle according to the first embodiment of the present invention is applied. It is sectional drawing in the AA line of FIG. It is a top view of the service plug operation hole to which the seal structure of the electric vehicle according to the second embodiment of the present invention is applied. It is sectional drawing in the BB line of FIG. It is a top view of the service plug operation hole of another structure different from the present invention. It is sectional drawing in the CC line of FIG. It is a top view of the service plug operation hole to which the seal structure of the electric vehicle according to the third embodiment of the present invention is applied. It is sectional drawing in the DD line | wire of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First embodiment]
First, the structure around the service plug operation hole of the electric vehicle according to the first embodiment of the present invention will be described.
FIG. 1 is a schematic view of the periphery of a service plug operation hole of an electric vehicle. FIG. 2 is a top view of the service plug operation hole to which the seal structure of the electric vehicle according to the first embodiment of the present invention is applied. 3 is a cross-sectional view taken along line AA in FIG. The thick arrows in FIG. 3 indicate the attachment direction of the maintenance lid when the battery unit is mounted on the vehicle.

The vehicle (electric vehicle) 1 of the present invention includes a traveling motor (electric motor) that is supplied with high-voltage power from the battery unit 20 via a high-voltage circuit and whose operation is controlled by an inverter as a traveling device of the vehicle 1. And an electric vehicle in which a charging cable extending from an external power source is connected to the charging lid and the battery unit 20 can be charged by a charger.
The battery unit 20 is composed of a secondary battery such as a lithium ion battery. The battery unit 20 includes a cell monitoring unit that monitors the battery cell, and monitors a plurality of battery modules including a plurality of battery cells, a temperature of the battery module, a remaining battery level, and the like based on an output of the cell monitoring unit. A battery monitoring unit, a service plug 22 that is formed of an insulating structure and that shuts off a high voltage circuit in the battery unit 20 during an emergency or maintenance of the vehicle 1 as shown in FIG. 3, and a conductive component that conducts high voltage In addition, a conductive part that is likely to conduct a high voltage due to a short circuit or the like is enclosed in a resin battery unit cover 21 and a battery unit case, and is integrally configured.

  As shown in FIG. 3, the battery unit cover 21 is provided with an opening 21 a for enabling the service plug 22 to be operated. In such a battery unit 20, the opening 21a of the battery unit cover 21 and the service plug operation hole (seal member mounting hole) 11a formed in the floor panel 11 forming the lower part of the vehicle body of the vehicle 1 are opposed to each other. Thus, it is disposed below the floor panel 12. That is, the battery pack 20 is disposed outside the vehicle compartment. The opening 21a of the battery unit cover 21 and the service plug operation hole 11a of the floor panel 11 are connected so that the opening 21a and the service plug operation hole 11a communicate with each other with a seal member 23 that prevents intrusion of water or the like. ing. After the battery unit 20 is mounted on the vehicle, a maintenance lid 30 formed in an oval shape is attached so as to cover the service plug operation hole 11a.

An insertion groove 23a for fixing the seal member 23 to the service plug operation hole 11a of the floor panel is formed at a location on the floor panel 11 side of the seal member 23 . The seat member 23 is fixed to the floor panel 11 by inserting the service plug operation hole 11a of the floor panel 11 into the insertion groove 23a. Further, a grommet portion 23b is formed at the upper end portion of the seal member 23 so as to protrude toward the vehicle interior side when the battery unit 20 is mounted on the vehicle.

As shown in FIGS. 2 and 3, a cover 40 formed so as to cover the grommet portion 23b is disposed on the grommet portion 23b.
The cover 40 is an insulating material and has an oval shape in which the inside along the shape of the grommet portion 23b is opened in a top view, and the lower side is open in a cross-sectional view. The cover 40 is formed in a substantially C shape that is inclined in the outer peripheral direction so that the maintenance lid 30 does not come off from the grommet portion 23b when the maintenance lid 30 contacts the cover 40 when the maintenance lid 30 is attached.

As shown in FIGS. 1 to 3, a parking cable 13, which is a parking brake cable operated by the driver to maintain the vehicle stop state, is provided above the service plug operation hole 11 a of the floor panel 11. It is arranged.
Hereinafter, the operation and effect of the service plug operation hole to which the sealing structure of the electric vehicle according to the first embodiment of the present invention configured as described above is applied will be described.

As shown in FIGS. 2 and 3, the cover 40 is made of an insulating material and has an oval shape along the shape of the grommet portion 23 b whose inside is opened in a top view, and is substantially C-shaped in which a lower portion is opened in a sectional view. Is formed. The cover 40 is disposed on the grommet portion 23b of the seal member 23 so as to cover the grommet portion 23b.
Thus, by providing the cover 40 that can cover the grommet portion 23b on the upper portion of the grommet portion 23b, for example, the parking cable 13 is provided on the upper portion of the service plug operation hole 11a of the floor panel 11, It is impossible to attach the maintenance lid 30 from above the service plug operation hole 11a, and it is necessary to move the maintenance lid 30 laterally between the parking cable 13 and the floor panel 12 as shown in FIG. When there is, the contact between the maintenance lid 30 and the grommet portion 23b can be prevented.

Therefore, it is possible to prevent the service plug operation hole 11a of the floor panel 11 from being removed from the insertion groove 23a of the seal member 23 by pushing the grommet portion 23b with the maintenance lid 30 when the maintenance lid 30 is attached.
Therefore, entry of water or the like into the battery unit 20 can be prevented.
Further, since the cover 40 is formed so as to cover the entire grommet portion 23b and the inner peripheral side wall is longer than the outer peripheral side wall, the cover 40 is fixed using a fastening member or the like. Therefore, the cover 40 can be easily attached without the need to provide a fixing portion for the purpose.
[Second Embodiment]
Hereinafter, the structure around the service plug operation hole of the electric vehicle according to the second embodiment of the present invention will be described.

FIG. 4 is a top view of a service plug operation hole to which an electric vehicle seal structure according to a second embodiment of the present invention is applied. FIG. 5 is a cross-sectional view taken along line BB in FIG. The thick arrows in FIG. 5 indicate the attachment direction of the maintenance lid when the battery unit is mounted on the vehicle.
As shown in FIGS. 4 and 5, in the second embodiment, the shape and fixing method of the cover 140 are changed with respect to the first embodiment, and the cover 140 different from the first embodiment will be described below. .

  As shown in FIG. 5, when the cover 140 is attached by moving the maintenance lid 30 laterally from between the vehicle body constituting member such as the parking cable 13 and the floor panel 12, the maintenance lid 30 and the grommet portion 23 b are attached to each other. The service plug operation hole 11a of the floor panel 11 is formed so as to cover the upper part of the contact panel and from the insertion groove 23a of the seal member 23. That is, the grommet 23b is formed so as to cover the upper part of the range of the grommet portion 23b on the insertion side (left side in FIG. 5) when the maintenance lid 30 is attached. Moreover, the cover 140 is formed on the cross-sectional shape which the grommet part 23b side opened. A fixing portion 141 is formed at the end of the cover 140 on the insertion side of the maintenance lid 30. In such a fixing portion 141, a pair of insertion holes 142 for fixing the cover 140 to the floor panel 11 with the fastening member 50 is formed.

Hereinafter, the operation and effect of the service plug operation hole to which the seal structure of the electric vehicle according to the second embodiment of the present invention configured as described above is applied will be described.
As shown in FIGS. 4 and 5, the cover 140 is formed so as to cover an upper portion of a range of the grommet portion 23 b on the insertion side (left side in FIG. 5) of the grommet portion 23 b when the maintenance lid 30 is attached. A fixing portion 141 having a pair of insertion holes 142 is formed at the end of the cover 140 on the insertion side of the maintenance lid 30. And it fixes to the floor panel 11 with a pair of fastening member 50 via the fixing | fixed part 141 of the said cover 140. As shown in FIG.

  As described above, when the maintenance lid 30 is attached, the maintenance lid 30 and the grommet portion 23b come into contact with each other, and the cover 140 is placed on the upper portion of the grommet portion 23b in a range where the grommet portion 23b may come off from the service plug operation hole 11a of the floor panel 11. As in the first embodiment, for example, the parking cable 13 is disposed above the service plug operation hole 11a of the floor panel 11, and the maintenance lid 30 is moved from above the service plug operation hole 11a. When it is necessary to move the maintenance lid 30 in the lateral direction between the parking cable 13 and the floor panel 12 as shown in FIG. 5, the maintenance lid 30 and the grommet portion 23b are not attached. Contact can be prevented.

Therefore, it is possible to prevent the service plug operation hole 11a of the floor panel 11 from being removed from the insertion groove 23a of the seal member 23 by pushing the grommet portion 23b with the maintenance lid 30 when the maintenance lid 30 is attached.
Therefore, entry of water or the like into the battery unit 20 can be prevented.
Further, since the cover 140 is fixed by the pair of fastening members 50, the cover 140 can be prevented from rotating around the fastening member 50 when the maintenance lid 30 is attached, so that the sealing member 23 can be reliably inserted. It is possible to prevent the service plug operation hole 11a of the floor panel 11 from coming off from the groove 23a .

FIG. 6 is a top view of a service plug operation hole to which another seal structure different from the present invention is applied. 7 is a cross-sectional view taken along the line CC of FIG. 7 indicates the attachment direction of the maintenance lid when the battery unit is mounted on the vehicle .

As shown in FIGS. 6 and 7, an insertion hole 11 b is formed in a service plug operation hole 11 a formed in the floor panel 11 on the insertion side (left side in FIG. 7) of the maintenance lid 30.
In addition, the maintenance lid 30 is inserted into the grommet portion 123b of the seal member 123 when the maintenance lid 30 is attached by moving the maintenance lid 30 laterally from between the vehicle body component such as the parking cable 13 and the floor panel 11 (FIG. 7). In the left side), a fixing portion 123c extending in the insertion direction of the maintenance lid 30 from the upper portion of the insertion groove 123a is formed. The end portion 123d of the fixing portion 123c is formed with a removal preventing structure 123d that engages with the inner peripheral portion of the insertion hole 11b when inserted into the insertion hole 11b of the floor panel 11 and prevents the removal. Specifically, the drop prevention structure 123d includes a tapered portion 123e having a downward apex that allows the end portion 123d of the fixed portion 123c to be easily inserted into the insertion hole 11b, and an end portion of the fixed portion 123c. A portion that comes into contact with the floor panel 11 after inserting 123d into the insertion hole 11b is configured with an engaging portion 123f formed horizontally.

As shown in FIGS. 6 and 7, when the maintenance lid 30 is attached, an end portion 123d having a removal prevention structure 123d is formed on the fixing portion 123c of the grommet portion 123b on the insertion side (left side in FIG. 7) of the maintenance lid 30. doing. Then, the end portion 123 d is inserted into the insertion hole 11 b of the floor panel 11, and the grommet portion 123 b is fixed to the floor panel 11.

  Thus, since the insertion side of the maintenance lid 30 of the grommet part 123b is fixed to the floor panel 11 when the maintenance lid 30 is attached, even if the maintenance lid 30 comes into contact with the grommet part 123b, the maintenance lid 30 It is possible to prevent the service plug operation hole 11a of the floor panel 11 from being removed from the insertion groove 23a of the seal member 23 by pushing the grommet portion 23b.

Therefore, entry of water or the like into the battery unit 20 can be prevented.
[ Third embodiment ]
Hereinafter, the structure around the service plug operation hole of the electric vehicle according to the third embodiment of the present invention will be described.
FIG. 8 is a top view of a service plug operation hole to which an electric vehicle seal structure according to a third embodiment of the present invention is applied. FIG. 9 is a cross-sectional view taken along line DD in FIG. The thick arrows in FIG. 9 indicate the attachment direction of the maintenance lid when the battery unit is mounted on the vehicle.

As shown in FIG. 9, in the third embodiment , the cover 40 is abolished and the shape of the floor panel 111 is changed with respect to the first embodiment, and the floor panel 111 different from the first embodiment is described below. explain.
As shown in FIG. 9, the surface 111 c of the floor panel 111 where the service plug operation hole 111 a is formed moves the maintenance lid 30 laterally from between the vehicle body component such as the parking cable 13 and the floor panel 11. The height is set to be lower than the surface 111d which becomes the insertion side (left side in FIG. 9) of the maintenance lid 30 when attaching. Specifically, as shown in FIG. 9, the surface 111c of the floor panel 111 where the service plug operation hole 111a is formed is a surface 111d in which only the upper part of the grommet portion 23b is the insertion side (the left side in FIG. 9) of the maintenance lid 30. It is formed so as to protrude more.

Hereinafter, the operation and effect of the service plug operation hole to which the seal structure of the electric vehicle according to the third embodiment of the present invention configured as described above is applied will be described.
As shown in FIG. 9, the height of the surface 111 c of the floor panel 111 on which the service plug operation hole 111 a is formed, that is, the height of the surface 111 c to which the grommet portion 23 b is attached, 30 is set to be lower than the height of the surface 111d on the insertion side (left side in FIG. 9).

  In this way, by setting the height of the surface 111c to which the grommet portion 23b is attached so that only the upper portion of the grommet portion 23b protrudes from the surface 111d on the insertion side (left side in FIG. 9) of the maintenance lid 30. When the maintenance lid 30 is attached, the contact between the maintenance lid 30 and the lower part of the grommet portion 23b is avoided, so that the grommet portion 23b is pushed by the maintenance lid 30 and the floor panel 11 is inserted from the insertion groove 23a of the seal member 23. It is possible to prevent the service plug operation hole 11a from coming off.

Therefore, entry of water or the like into the battery unit 20 can be prevented.
Moreover, since it is not necessary to use a new component for preventing the grommet portion 23b from falling off, an increase in cost can be suppressed.

1 Vehicle (Electric vehicle)
11, 111 Floor panel 11a, 111a Service plug operation hole (seal member mounting hole)
20 Battery unit 21 Battery unit cover 23, 123 Seal member
30 Maintenance lid (cap member)
40,140 Cover (Falling prevention member)

Claims (4)

A battery unit having an opening that communicates with the inside and outside of the housing, and is provided with a seal member that is elastically deformed and maintains a sealed state when mounted on the vehicle, and communicates with the vehicle interior at a position facing the opening. A floor panel in which a seal member mounting hole is formed by fitting an upper part of the member and a cap member fixed to the floor panel so as to cover the seal member mounting hole; In the seal structure of the electric vehicle in which the battery unit is disposed,
A seal structure for an electric vehicle, comprising: a drop prevention means for preventing contact between the cap member and the seal member when the cap member is attached. The drop-off prevention means is a drop-off prevention member formed so as to cover the upper end portion of the seal member,
2. The electric vehicle according to claim 1, wherein the drop-off prevention member is disposed so as to cover an upper end portion of the seal member after the seal member is mounted in the seal member mounting hole. Seal structure.   The drop-off prevention member is formed so as to cover an upper end portion of the seal member on a side in which the cap member is inserted when the cap member is attached. Further, the drop-off prevention member is attached to the floor. The sealing structure for an electric vehicle according to claim 1, wherein a fixing portion for fixing to the panel is formed.   The height of a part where the seal member insertion hole of the floor panel is formed is set lower than the height of the other part of the drop-off prevention unit. Electric vehicle seal structure.

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