JP5408438B2 - Battery case for vehicle - Google Patents

Description

  The present invention relates to a vehicle battery case, and more particularly to a battery case for storing a battery that drives an electric vehicle.

In recent years, hybrid vehicles and electric vehicles that have a large-capacity battery and that use a drive motor driven by the power of the battery as one of the power sources have been widely developed.
A battery case mounted on such an electric vehicle includes, as an example, a tray member made of a resin that houses a battery and a cover member made of a resin that covers the tray member. As the battery, for example, a lithium ion battery is used.

  As a method for housing a battery that requires a high degree of waterproofness such as a lithium ion battery, for example, Patent Document 1 includes a structure in which a waterproof seal member is provided at a joint portion of a peripheral portion between a cover member and a tray member. This prevents water from entering from the joint.

JP 2009-87645 A

In such a sealing member, by fastening the peripheral portions of the cover member and the tray member with the fastening member, a compressive force pressing in the axial direction of the fastening member acts, and the cover member, the tray member, and the sealing member come into contact with each other. The contact surface is pressurized, whereby the contact surface pressure is secured and the sealing performance is maintained.
In this regard, in the conventional technique disclosed in Patent Document 1, the seal member is supplied to the peripheral edge of the joint between the cover member and the tray member. Due to variations in shape such as thickness, the influence of cold temperature and deformation of the cover member and tray member due to thermal creep, the contact surface cannot be pressurized almost evenly, resulting in reduced sealing performance and water resistance. There is a problem that reliability is lowered.

Further, if the interval between the fastening members is reduced in order to prevent deformation of the peripheral portions of the cover member and the tray member and to make the contact surface pressure variation due to the shape variation substantially uniform, the number of parts increases and the man-hour increases. Therefore, productivity is lowered, which is not preferable.
The present invention has been made to solve the above-described problems, and an object of the present invention is to secure a contact surface pressure regardless of deformation or variation in the shape of the seal portions of the cover member and the tray member, and to maintain the battery. An object of the present invention is to provide a vehicle battery case capable of stabilizing the sealing performance required for the case.

  In order to achieve the above object, a vehicle battery case according to claim 1 is a vehicle battery case for storing a battery for driving a vehicle, and a holding portion for holding the battery, and extends radially outward from the holding portion. A tray member constituted by a tray side peripheral portion, a cover portion covering the battery, and a cover member constituted by a cover side peripheral portion extending radially outward from the cover portion and overlapping the tray side peripheral portion, A holding member that holds the tray-side peripheral edge and the cover-side peripheral edge so as to overlap with each other, and is continuously provided in one of the tray-side peripheral edge and the cover-side peripheral edge along the circumferential direction. The groove portion and the tray-side peripheral portion or the cover-side peripheral portion are continuously provided along the circumferential direction and engageable with the groove portion. And an elastic member disposed between the convex portion and the groove portion, and at least one of the convex portion and the elastic member has a groove portion-side surface of the elastic member. In cross-sectional view perpendicular to the continuous direction of the convex portion, the cross section is formed to be wide from the distal end side to the proximal end of the convex portion so as to contact the inner wall of the groove portion.

According to a second aspect of the present invention, in the vehicle battery case according to the first aspect, in the cross-sectional view perpendicular to the continuous direction of the convex portion, the cross-sectional shape of the elastic member is substantially V-shaped or substantially inverted V that can be fitted into the convex portion. It has a character shape.
The vehicle battery case according to claim 3 is characterized in that, in claim 1 or 2, the elastic member is an elastic rubber member.

According to a fourth aspect of the present invention, in the vehicle battery case according to any one of the first to third aspects, the groove portion has an opening area larger than an area of the inner bottom wall in a cross-sectional view horizontal in the continuous direction of the convex portion. It is a shape.
According to a fifth aspect of the present invention, in the vehicle battery case according to any one of the first to fourth aspects, the groove portion includes the air hole provided through the bottom wall and the air after the elastic member is engaged with the groove portion. And a sealing plug for closing the hole.

According to a sixth aspect of the present invention, there is provided a vehicle battery case according to any one of the first to fifth aspects, wherein at least one of the elastic member and the inner wall of the groove is provided with one or more protrusions that are in contact with the other. It is characterized by being.
According to a seventh aspect of the present invention, there is provided a battery case for a vehicle according to any one of the first to sixth aspects, wherein the battery case is disposed in contact with the peripheral edge of the tray side, and one end is provided to extend radially outward from the peripheral edge of the tray. A first holding member, and a second holding member disposed in contact with the cover-side peripheral edge and having one end extending a predetermined length radially outward from the cover-side peripheral edge, The first and second holding members are fastened by a fastening member at a predetermined position radially outward from the tray side peripheral edge and the cover side peripheral edge.

  A vehicle battery case according to an eighth aspect of the invention is characterized in that, in any one of the first to seventh aspects, the vehicle battery case further includes a regulating portion that regulates the expansion of the groove portion when the convex portion and the groove portion are engaged. .

  According to the vehicle battery case of claim 1, the cover side peripheral portion and the tray side peripheral portion are held in an overlapping state by the holding member, and are continuous in the circumferential direction with either the cover side peripheral portion or the tray side peripheral portion. A groove is provided, and a convex part that is continuous along the circumferential direction of the other peripheral part is provided, and a continuous elastic member is disposed between the groove part and the convex part. At least one of the members has a cross section that widens from the front end side of the convex portion to the base end in a cross-sectional view perpendicular to the continuous direction of the convex portion so that the groove side surface of the elastic member contacts the inner wall of the groove portion It is formed.

  Accordingly, the holding member holds the tray-side peripheral edge and the cover-side peripheral edge so as to overlap each other, so that a compressive force that presses in the axial direction of the holding member acts, and the cover-side peripheral edge toward the tray-side peripheral edge. When pressed, at least one of the convex portion and the elastic member is wide in a cross-sectional view perpendicular to the continuous direction of the convex portion, and the elastic member is pushed into the groove portion while being in contact with the inner wall of the groove portion. By increasing the area that receives the compressive force that presses in the direction perpendicular to the contact surface with the elastic member from the inner wall of the groove portion, a high contact surface pressure is obtained.

  As a result, even when the holding force of the holding member varies, when the compressive force that presses the cover-side peripheral edge toward the tray-side peripheral edge acts, the elastic member is pushed into the groove to contact the elastic member from the inner wall of the groove. Since the compressive force that presses in the direction perpendicular to the surface acts, variation in the compressive force that acts in the direction perpendicular to the contact surface is reduced, and the sealing performance can be stabilized and the reliability can be improved.

Moreover, even if the shape of the cover member or tray member constituting the battery case varies, the elastic member is pushed into the groove portion by the compressive force that presses in the axial direction of the holding member, thereby maintaining the sealing performance of the elastic member. In addition, the waterproofness of the battery case can be improved.
Furthermore, even if the cover member or the tray member is deformed due to the influence of the cold temperature or the like and the shape varies, the sealing performance of the elastic member can be maintained.

According to the vehicle battery case of the second aspect, in the cross-sectional view perpendicular to the continuous direction of the convex portion, the cross-sectional shape of the elastic member is a substantially V shape or a substantially inverted V shape that can be fitted into the convex portion. It is possible to improve the outfitting property of the elastic member to the convex portion, and to improve the productivity.
According to the vehicle battery case of the third aspect, since the elastic member is an elastic rubber member, the contact surface with the groove is satisfactorily sealed, so that the sealing performance is improved and the waterproof property can be improved.

According to the vehicle battery case of the fourth aspect, since the groove has a shape in which the opening area is larger than the area of the inner bottom wall in a cross section viewed in a horizontal cross section in the continuous direction of the protrusion, the elastic member As the contact area is expanded, the compressive force from the inner wall of the groove portion to the contact surface becomes higher, so that the sealing performance can be further improved and the waterproof property can be improved.
According to the vehicle battery case of the fifth aspect, since the groove portion includes the air hole penetrating the bottom wall, when the elastic member is fitted to the groove portion, the groove is applied to the bottom wall of the groove portion. Since the pressure can be released from the air holes, variations in the wearability of the elastic member can be improved.

Further, by closing the air hole with a sealing plug after engaging the elastic member fitted in the convex portion with the groove portion, the bottom wall of the groove portion becomes a continuous bottom wall, so that the elastic member engaged with the groove portion The sealing property of the closed space between the groove side surface and the inner wall is ensured, and the sealing performance of the elastic member can be ensured.
According to the vehicle battery case of claim 6, since at least one of the elastic member and the inner wall of the groove portion is provided with one or more protrusions that contact the other, the contact surface with the elastic member The number and the contact area are enlarged, and the compressive force from the inner wall of the groove portion to the contact surface becomes higher, so that the waterproofness can be improved by further improving the sealing performance.

  According to the vehicle battery case of claim 7, the first holding member that is disposed in contact with the tray-side peripheral edge and that has one end extending a predetermined length radially outward of the tray-side peripheral edge, and the cover The second holding member which is disposed in contact with the side peripheral edge and has one end extending a predetermined length radially outward of the cover peripheral edge is radially outward from the tray peripheral edge and the cover peripheral edge. It is fastened by a fastening member at a predetermined position.

As a result, since a fastening force is applied in the axial direction of the fastening member, the cover-side peripheral portion is pressed in the tray-side peripheral portion direction, and the seal member fitted into the convex portion is pushed into the inner wall of the groove portion, and the elastic member and the inner wall Since the compressive force acts in the direction perpendicular to the contact surface, a high contact surface pressure can be obtained, and the waterproofness can be improved by improving the sealing performance.
In addition, since variation in the pressing force acting in the direction perpendicular to the contact surface is reduced, torque management of the fastening torque of the fastening member is facilitated, and productivity can be improved.

  According to the vehicle battery case of the eighth aspect, when the convex portion and the groove portion are engaged with each other, since the restriction portion that restricts the expansion of the groove portion is provided, the contact surface pressure is reduced by expanding the groove portion, Decreasing the sealing performance can be suppressed. In addition, by restricting the spread, the seal member fitted into the convex portion is strongly pushed into the inner wall of the groove portion, so that the wedge effect is more exerted, and the seal performance is improved by obtaining a higher contact surface pressure. , Can improve waterproofness.

1 is a perspective view of an electric vehicle on which a battery case according to the present invention is placed. It is a schematic block diagram of the battery case shown in FIG. It is a disassembled perspective view of the battery case which concerns on 1st Embodiment of this invention. FIG. 3 is an enlarged view of a longitudinal section taken along line AA in FIG. 2. It is a disassembled perspective view of the battery case which concerns on 2nd Embodiment of this invention. It is an enlarged view of the longitudinal section which follows the AA line of FIG. 2 in 2nd Embodiment. It is an enlarged view of the longitudinal section which follows the AA line of FIG. 2 in 3rd Embodiment of this invention. FIG. 8 is an exploded view of FIG. 7. It is an enlarged view of the longitudinal section which follows the AA line of FIG. 2 in 4th Embodiment of this invention. FIG. 10 is an exploded view of FIG. 9. It is an enlarged view of the longitudinal section which follows the AA line of FIG. 2 in 5th Embodiment of this invention. FIG. 12 is an exploded view of FIG. 11. It is an enlarged view of the longitudinal section which follows the AA line of FIG. 2 in 6th Embodiment of this invention. FIG. 14 is an exploded view of FIG. 13. It is an enlarged view of the longitudinal section which follows the AA line of FIG. 2 in 7th Embodiment of this invention. FIG. 16 is an exploded view of FIG. 15.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an electric vehicle equipped with a battery case according to the present invention.
As shown in FIG. 1, the electric vehicle 1 includes a battery case 10 placed under the floor of the vehicle body 2 and an external charging path (not shown), and is charged by receiving electric power from the charging path. The charger 12 to be performed is disposed at the rear portion of the vehicle body 2, and the battery case 10 is configured to be connected to the charger 12 to store electricity.

  As shown in FIG. 2, the battery case 10 includes a resin tray (tray member) 20, a cover (cover member) 22, a first sheet metal plate (first holding member) 24 that covers the outer periphery of the resin tray 20, A second sheet metal plate (second holding member) 26 covering the peripheral edge of the cover 22, a bolt 28 and a nut 29 (holding member) for fastening the first and second sheet metal plates 24, 26 are configured.

The resin tray 20 and the cover 22 are made of an electrically insulating resin, and the resin is reinforced by a reinforcing member such as glass fiber.
FIG. 3 shows an exploded perspective view of the battery case 10 according to the first embodiment of the present invention.
As shown in FIG. 3, a plurality of battery modules 30 are provided on the resin tray 20. The battery module 30 is obtained by connecting a plurality of battery cells formed of lithium ion batteries in series. Note that the secondary battery is not limited to a lithium ion battery.

A first sheet metal plate 24 is disposed on the outer periphery of the resin tray 20, and one end of the first sheet metal plate 24 extends a predetermined length from the tray side peripheral edge portion 32 on the radially outer side of the resin tray 20. Each of the through holes 34 is formed at one end thereof.
The resin tray side peripheral edge 32 overlaps the cover side peripheral edge 36. A second sheet metal plate 26 is disposed on the cover side peripheral edge 36, and one end of the second sheet metal plate 26 is formed on the radially outer side of the cover 22 by extending a predetermined length from the cover side peripheral edge 36. At one end, a through hole 38 is formed at a predetermined position overlapping the through hole 34 formed in the first sheet metal plate 24.

The resin tray side peripheral portion 32 is provided with a protruding portion (convex portion) 42 that is continuous along the circumferential direction with the overlapping portion 40 that overlaps the cover side peripheral portion 36.
Specifically, as shown in the enlarged view of the vertical cross section along the line AA in FIG. It is a divergent shape whose width increases from the distal end 44 toward the proximal end when viewed.

  A continuous sealing member (elastic member) 46 is fitted into the protruding portion 42. The cross section of the seal member 46 as viewed in a state of being fitted into the protruding portion 42 has a substantially inverted V shape, and the cross sectional shape of the seal member 46 is a divergent shape whose width increases in the proximal direction of the protruding portion 42. The seal member 46 is a seal member made of, for example, an elastic rubber member, but is not limited to this as long as necessary waterproofness can be obtained.

A lip (protrusion) 48 is provided on the back surface of the surface where the seal member 46 contacts the top surface 44 of the protrusion 42.
The groove part 50 is provided in the cover side peripheral part 36 thicker than the tray side peripheral part 32, is provided continuously so as to cover the protruding part 42, and is seen in a horizontal sectional view in the continuous direction of the protruding part 42. It is formed in a divergent shape in which the opening area is larger than the area of the inner bottom wall (inner wall) 52 in the cross section.

Thus, by engaging the protruding portion 42 with the groove portion 50, the groove side surface of the seal member 46 is pressed and brought into contact with the inner wall (inner wall) 54 of the groove portion 50, and the lip 48 is pressed against the inner bottom wall 52. Being touched.
The resin tray side peripheral edge portion 32 where the protruding portion 42 is erected has a groove portion 50 so that the groove portion does not expand due to the pressure P of the protruding portion 42 and the seal member 46 when the protruding portion 42 engages with the groove portion 50. A restricting portion 100 that restricts the shape is provided.

As a result, the first and second sheet metal plates 24, 26, the projecting portion 42, and the seal member 46 improve the wedge effect with respect to the pressure P, so that the sealing performance is further improved. In addition, although the control part 100 may be provided in the cyclic | annular form continuous along the circumferential direction, it is good also as a protrusion shape which opened the predetermined space | interval as needed.
Ribs 58 are provided from the rear end toward the outer wall 56 along the circumferential direction of the back surface of the overlapping portion 40 of the tray side peripheral edge portion 32, and the rigidity of the resin tray 20 is ensured by the ribs 58. The first sheet metal plate 24 is disposed so as to contact the lower end of the rib 58, and the other end is provided to extend to the bottom wall 60 of the resin tray 20.

On the back surface of the overlapping portion 40 of the cover side peripheral portion 36, a convex portion 62 is provided protruding from the back end, and the convex portions 62 are respectively arranged along the circumferential direction. The other end of the second sheet metal plate 26 provided with the bent portion 64 covering the convex portion 62 is bent and is in contact with the cover side peripheral edge portion 36, and the convex portion 62 is a pull-out preventing member of the second sheet metal plate 26. Become.
The first sheet metal plate 24 and the second sheet metal plate 26 are fastened by fitting bolts 28 and nuts 29 into through holes 34 and 38 drilled at the respective ends. Accordingly, the resin tray side peripheral edge portion 32 and the cover side peripheral edge portion 36 are held between the first sheet metal plate 24 and the second sheet metal plate 26.

  As described above, according to the present embodiment, the protruding portion 42 is erected on the tray side peripheral edge portion 32, and the sectional shape of the protruding portion 42 in the sectional view perpendicular to the continuous direction of the protruding portion 42 is the protruding portion 42. The projecting portion 42 has an approximately V-shaped cross-section, and the projecting portion 42 has a substantially inverted V-shaped cross-section, and the projecting portion 42 has a diverging-shaped sealing member 46 whose width increases in the proximal direction. Is inserted. The cover-side peripheral edge portion 36 that is thicker than the tray-side peripheral edge portion 32 is provided with a groove portion 50 that is continuous along the circumferential direction, and the groove portion 50 is engaged with the projecting portion 42 and the seal member 46 fitted into the projecting portion 42. Is done. The first sheet metal plate 24 is disposed on the outer periphery of the resin tray 20, and the second sheet metal plate 26 is disposed on the back surface of the cover side peripheral edge 36, and the radial direction extends from the peripheral edges 32, 36. A tray side peripheral portion is formed by fitting and fastening bolts 28 and nuts 29 to through holes 34 and 38 formed at one end of first and second sheet metal plates 24 and 26 extending to a predetermined length on the outside. 32 and the cover side peripheral edge 36 are sandwiched between the first sheet metal plate 24 and the second sheet metal plate 26.

Accordingly, the first and second sheet metal plates 24 and 26 fastened by the bolt 28 and the nut 29 press the cover side peripheral edge portion 36 in the direction of the tray side peripheral edge portion 32, and the seal member 46 fitted in the protruding portion 42 has the groove portion. 50.
As a result, the contact area between the inner wall 54 of the groove 50 and the seal member 46 is increased by the divergent shape of the seal member 46, so the area on which the compressive force that presses the contact surface in the direction perpendicular to the contact surface also increases is high The contact surface pressure can be obtained, and the waterproofness can be improved by improving the sealing performance.

  Further, even when the fastening force in the axial direction of each bolt 28 due to fastening of each bolt 28 and nut 29 varies, a pressing force that presses the cover side peripheral edge portion 36 toward the tray side peripheral edge portion 32 acts, and the seal member When 46 is pushed into the groove 50, a compressive force that presses the contact surface in the direction perpendicular to the contact surface from the inner wall 54 of the groove 50 acts on the contact surface. As a result, the sealing performance can be stabilized and the reliability can be improved.

Furthermore, since the variation of the compressive force acting in the direction perpendicular to the contact surface is reduced when the seal member 46 is pushed into the groove portion 50, torque management of the tightening torque of the bolt 28 is facilitated and productivity can be improved. it can.
Further, since the seal member 46 has a substantially inverted V shape, the fitting property to the protruding portion 42 is improved, and the productivity can be improved.

Moreover, since the sealing member 46 is comprised from an elastic rubber member, sealing performance can be improved by sealing the contact surface with the groove part 50 well, and waterproofing can be improved.
A lip 48 is provided on the back surface of the surface of the seal member 46 that contacts the tip 44 of the protruding portion 42, and the lip 48 contacts the inner bottom wall 52 of the groove portion 50, so that the number of contact surfaces of the seal member 46 is increased. Since the contact area is increased and the contact area is enlarged, the compressive force acting in the direction perpendicular to the contact surface is further increased, and the waterproof performance can be improved by improving the sealing performance.

  Further, the outer periphery of the resin tray 20 and the cover-side peripheral edge 36 are sandwiched and fastened by the first and second sheet metal plates 24, 26, so that the tray-side peripheral edge 32 and the cover-side peripheral edge 36 become the tray-side peripheral edge. Since the seal member 46 is pressed in the direction of the portion 32, the seal member 46 is fastened to the inner wall 54 of the groove portion 50, the contact surface of the seal member 46 is pressed by the compressive force from the inner wall 54, and the compressive force in the direction perpendicular to the contact surface is Since it increases, waterproof performance can be improved by improving sealing performance.

Next, a second embodiment according to the present invention will be described.
Compared to the first embodiment, the vehicle battery case of the present embodiment has a protruding portion 42 erected on the cover-side peripheral edge 36 and a groove 50 on the tray-side peripheral edge 32 that is thicker than the cover-side peripheral edge 36. The points provided are different, and other configurations are common. Therefore, the description of the common part is omitted, and the difference is described.

FIG. 5 shows an exploded perspective view of a vehicle battery case according to a second embodiment of the present invention.
As shown in FIG. 5, a groove 50 is provided in the tray side peripheral edge 32.
Specifically, as shown in FIG. 6 which is an enlarged view of a vertical section along the line AA in FIG. 2, the tray side peripheral edge portion 32 is thicker than the cover side peripheral edge portion 36, and in the continuous direction of the protruding portion 42. A groove portion 50 having a shape in which the opening area is larger than the area of the inner bottom wall 52 in the cross-sectional shape viewed in a horizontal cross-sectional view is provided. Then, a substantially V-shaped sealing member 46 is fitted into the protruding portion 42 erected on the cover side peripheral edge portion 36, and the sealing member 46 is fitted into the groove portion 50 together with the protruding portion 42.

Further, the cover-side peripheral portion 36 where the protruding portion 42 is erected has a groove portion so that the groove portion 50 does not expand due to the pressure P of the protruding portion 42 and the seal member 46 when the protruding portion 42 engages with the groove portion 50. A restricting portion 100 is provided to restrict the shape of 50.
A first sheet metal plate is disposed on the outer periphery of the resin tray 20, and a second sheet metal plate is disposed on the cover side peripheral edge 36, and a predetermined length is formed radially outward from the tray side peripheral edge 32 and the cover side peripheral edge 36. The bolt 28 and the nut 29 are fastened at a predetermined extended position.

  As described above, according to the present embodiment, the groove portion 50 provided in the tray side peripheral edge portion 32 is engaged with the seal member 46 fitted in the protruding portion 42 erected on the cover side peripheral edge portion 36. The first sheet metal plate 24 provided in contact with the outer periphery of the resin tray 20 and the second sheet metal plate 26 provided in contact with the cover side peripheral edge 36 are arranged, and one end of the tray side peripheral edge 32 is provided. The bolt 28 and the nut 29 are fastened at a predetermined position extending a predetermined length outward in the radial direction of the cover side peripheral edge 36.

With such a configuration, a pressing force acts in the axial direction of the bolt 28 and the nut 29, so that the cover-side peripheral edge 36 is pressed in the direction of the tray-side peripheral edge 32 and is erected on the cover-side peripheral edge 36. The sealing member 46 fitted into the protruding portion 42 is pushed into the groove 50, and the same effect as in the first embodiment can be obtained.
Moreover, since the sealing member 46 is substantially V-shaped, the outfitting property to the protrusion part 42 is improved, and productivity can be improved.

Next, a third embodiment according to the present invention will be described.
The vehicle battery case of the present embodiment is different from the first embodiment in that the groove portion 50 has a bottomed cylindrical shape, and other configurations are common. Therefore, the description of the common part is omitted, and the difference is described.
FIG. 7 is an enlarged view of a longitudinal section taken along line AA of FIG. 2 according to the third embodiment of the present invention.

As shown in FIG. 7, the groove portion 50 provided in the cover side peripheral edge portion 36 has a bottomed cylindrical shape, and the seal member 46 is engaged with the groove portion 50.
As shown in the exploded view of FIG. 7, the seal member 46 fitted into the projecting portion 42 has a divergent shape from the distal end 44 to the base end of the projecting portion 42, and the seal member fitted into the projecting portion 42. The width at both ends of 46 is configured to be larger than the width of the groove 50.

With such a configuration, a pressing force acts in the axial direction of the bolt 28 and the nut 29, so that the cover side peripheral edge 36 is pressed in the direction of the tray side peripheral edge 32 and is erected on the tray side peripheral edge 32. Since the seal member 46 fitted into the protruding portion 42 is pushed into the groove portion 50, the same effect as in the first embodiment can be obtained.
Next, a fourth embodiment according to the present invention will be described.

The vehicle battery case of the present embodiment has a groove portion 50 that is cylindrical from the inner bottom wall 52 to the approximate center with respect to the first embodiment, and the width increases from the approximate center toward the overlapping portion 40. The other difference is that it has a divergent shape, and other configurations are common. Therefore, the description of the common part is omitted, and the difference is described.
FIG. 9 is an enlarged view of a longitudinal section taken along line AA of FIG. 2 according to the fourth embodiment of the present invention.

As shown in FIG. 9, the groove portion 50 provided in the cover side peripheral edge portion 36 has a cylindrical shape from the inner bottom wall 52 to the approximate center, and has a divergent shape whose width increases from the approximate center toward the overlapping portion 40. is there.
As shown in the exploded view of FIG. 9 in FIG. 10, the width in the vicinity of the center in the cross section of the groove portion 50 is configured to be smaller than the width in the cross section of the seal member 46 fitted in the protruding portion 42.

  With such a configuration, a pressing force acts in the axial direction of the bolt 28 and the nut 29, so that the cover side peripheral edge 36 is pressed in the direction of the tray side peripheral edge 32 and is erected on the tray side peripheral edge 32. Since the seal member 46 fitted into the protruding portion 42 is pushed into the groove portion 50 and the contact area between the seal member 46 and the inner wall 54 is increased by the shape of the groove portion 50 spreading outward, the same effect as in the first embodiment can be obtained. Can be obtained.

Next, a fifth embodiment according to the invention will be described.
The vehicle battery case of this embodiment is different from the fourth embodiment in that side projections are provided on both side surfaces of the seal member 46 facing the inner wall 54 in the shape of the end portion of the groove portion 50. Other configurations are common. Therefore, the description of the common part is omitted, and the difference is described.

FIG. 11 is an enlarged view of a longitudinal section taken along line AA of FIG. 2 according to the fifth embodiment of the present invention.
As shown in FIG. 11, side protrusions (protrusions) 66 are provided on both side surfaces of the seal member 46 facing the inner wall 54 in the shape of the end of the groove portion 50.
As shown in the exploded view of FIG. 11, the width of the side protrusions 66, 66 of the seal member 46 is formed to be larger than the width in the groove portion 50 in the divergent shape of the groove portion 50 with which the seal member abuts. The

  With such a configuration, a pressing force acts in the axial direction of the bolt 28 and the nut 29, so that the cover side peripheral edge 36 is pressed in the direction of the tray side peripheral edge 32 and is erected on the tray side peripheral edge 32. The seal member 46 fitted into the protruding portion 42 is pushed into the groove 50, and the side projections 66 provided on both side surfaces of the seal member 46 come into contact with the inner wall 54 of the groove 50 and are pressed from the inner wall 54. Therefore, the same effect as the fourth embodiment can be obtained.

Next, a sixth embodiment of the present invention will be described.
In the vehicle battery case of the present embodiment, the shape of the seal member 46 is substantially reverse V-shaped in a cross-sectional view perpendicular to the continuous direction of the projecting portion 42, as compared to the fourth embodiment. The difference is that they have substantially the same width, and other configurations are common. Therefore, the description of the common part is omitted, and the difference is described.

FIG. 13 is an enlarged view of a longitudinal section taken along line AA of FIG. 2 according to the sixth embodiment of the present invention.
As shown in FIG. 13, a seal member 46 is fitted into the protrusion 42, and the seal member 46 viewed in the state of being fitted into the protrusion 42 has a substantially inverted V shape.
As shown in the exploded view of FIG. 13 in FIG. 14, the width in the vicinity of the center in the groove portion 50 is configured to be smaller than the width of the seal member 46 fitted in the protruding portion 42.

  With such a configuration, a pressing force acts in the axial direction of the bolt 28 and the nut 29, so that the cover side peripheral edge 36 is pressed in the direction of the tray side peripheral edge 32 and is erected on the tray side peripheral edge 32. Since the seal member 46 fitted into the protruding portion 42 is pushed into the groove 50 and the contact area with the inner wall 54 is expanded, the same effect as in the fourth embodiment can be obtained.

Next, a seventh embodiment of the present invention will be described.
The vehicle battery case of the present embodiment is different from the third embodiment in that a through hole is provided in the bottom wall of the groove 50 and the through hole is closed with a sealing plug, and other configurations are common. doing. Therefore, the description of the common part is omitted, and the difference is described.
FIG. 15 is an enlarged view of a longitudinal section taken along line AA of FIG. 2 according to the seventh embodiment of the present invention.

As shown in FIG. 15, a through hole (air hole) 70 formed in the bottom wall 68 of the groove 50 is closed by a sealing plug 72, and the bottom wall 68 becomes a continuous bottom wall.
As shown in the exploded view of FIG. 15 in FIG. 16, the through hole 70 becomes an air hole of the groove 50.
With this configuration, when the seal member 46 fitted in the protruding portion 42 is engaged with the groove portion 50, the seal member 46 and the groove portion 50 come into contact with each other to form a contact surface, so that the groove portion side of the seal member 46 is formed. Since a closed space is prevented from being formed between the surface and the bottom wall 68, the pressure of the space formed by the groove-side surface of the seal member 46 and the bottom wall 68 is increased by pushing the seal member 46. In addition, since the pressure from the through hole 70 is prevented and the wearability of the seal member 46 is prevented from being deteriorated, the wearability is improved and the productivity can be improved.

Further, by closing the through-hole 70 with the sealing plug 72, the bottom wall 68 becomes a continuous bottom wall, and the sealing performance of the groove 50 is ensured, so that the waterproof performance can be improved by improving the sealing performance. .
Moreover, the same effect as the said 3rd Embodiment can be acquired.
Although the description of the embodiment is finished as described above, the present invention is not limited to the above-described embodiment.

  For example, in each of the above embodiments, the width of the cross section of the protrusion 42 as viewed in a cross section perpendicular to the continuous direction of the protrusion 42 is a divergent shape that expands from the distal end 44 toward the proximal end. The shape of the elastic member 46 fitted into the projecting portion 42 is formed so that the cross section of the elastic member 46 is wide from the distal end 44 of the projecting portion 42 to the proximal end. May be.

  Further, in each of the above embodiments, the first and second sheet metal plates 24 and 26 are disposed in contact with the outer periphery of the resin tray 20 and the cover-side peripheral edge 36, respectively, and the diameters are increased from the tray-side peripheral edge 32 and the cover-side peripheral edge 36. The cover 28 is tightened by a bolt 28 and a nut 29 at a predetermined position on the outer side in the direction, and the cover-side peripheral edge 36 is pressed in the direction of the tray-side peripheral edge 32, but the cover-side peripheral edge 36 is pressed in the direction of the tray-side peripheral edge 32. If possible, it is not limited to this.

Further, in each of the above embodiments, the rib 58 for securing rigidity is provided on the back surface of the tray-side peripheral edge portion 32, and the convex portion 62 is provided on the back surface of the cover-side peripheral edge portion 36 as a pull-out preventing member for the second sheet metal plate 26. The ribs 58 and the protrusions 62 need not be provided, although they are arranged and provided.
Further, in each of the above embodiments, the lip 48 is provided on the seal member 46, but a protrusion that contacts the seal member 46 may be provided in the groove 50.

  Moreover, although each said embodiment demonstrated the electric vehicle to the example, it is applicable also to a hybrid vehicle.

1 Electric Vehicle 10 Battery Case 20 Resin Tray (Tray Member)
22 Cover (cover member)
32 Tray side peripheral part 36 Cover side peripheral part 42 Projection part (convex part)
46 Sealing member (elastic member)
48 Lip (protrusion)
50 Groove 66 Side projection (projection)
70 Through hole (air hole)
72 Seal plug 100 Regulatory Department

Claims (8)

In a vehicle battery case for storing a battery for driving the vehicle,
A tray member composed of a holding portion for holding the battery, and a tray side peripheral portion extending radially outward from the holding portion;
A cover member configured by a cover portion that covers the battery and a cover-side peripheral portion that extends radially outward from the cover portion and overlaps the tray-side peripheral portion;
A holding member that holds the tray side peripheral edge and the cover side peripheral edge in an overlapping state;
A groove portion provided continuously along the circumferential direction on either the tray-side peripheral edge portion or the cover-side peripheral edge portion;
A convex portion that is continuously provided along the circumferential direction and engageable with the groove portion is formed on the other of the tray side peripheral portion and the cover side peripheral portion,
An elastic member disposed between the convex portion and the groove portion;
At least one of the convex portion and the elastic member has a cross-section in the sectional view perpendicular to the continuous direction of the convex portion so that the groove side surface of the elastic member contacts the inner wall of the groove portion. A battery case for vehicles, wherein the vehicle battery case is formed wider from the distal end side toward the proximal end.   The cross-sectional shape of the elastic member in a cross-sectional view perpendicular to the continuous direction of the convex portion is a substantially V shape or a substantially inverted V shape that can be fitted into the convex portion. Vehicle battery case.   The vehicle battery case according to claim 1, wherein the elastic member is an elastic rubber member.   4. The groove according to claim 1, wherein the groove has a shape in which an opening area is larger than an area of an inner bottom wall in a horizontal cross-sectional view in a continuous direction of the convex portion. Battery case for vehicles. The groove is
An air hole provided through the bottom wall;
A sealing plug that closes the air hole after engaging the elastic member with the groove;
The vehicle battery case according to any one of claims 1 to 4, further comprising:   The at least any one of the said elastic member and the inner wall of the said groove part is provided with the 1 or more protrusion part which contacts any other, The one in any one of Claim 1 thru | or 5 characterized by the above-mentioned. Battery case for vehicles. A first holding member that is disposed in contact with the peripheral edge of the tray and is provided with one end extending a predetermined length radially outward from the peripheral edge of the tray;
A second holding member that is disposed in contact with the cover-side peripheral edge and has one end extending a predetermined length radially outward from the cover-side peripheral edge;
The first and second holding members are fastened by a fastening member at a predetermined position radially outward from the tray side peripheral edge and the cover side peripheral edge. The vehicle battery case as described.   The vehicle battery case according to any one of claims 1 to 7, further comprising a restricting portion that restricts an expansion of the groove portion when the convex portion and the groove portion are engaged with each other.

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