JP3754053B2 - In-vehicle structure of high-voltage equipment box - Google Patents

Description

  The present invention relates to a vehicle-mounted structure of a high-voltage equipment box used for, for example, a hybrid vehicle.

Conventionally, for example, as a vehicle-mounted structure of a high-voltage equipment box in a hybrid vehicle or the like, frame members that extend rearward are attached to the lower portions on both sides of the housing of the high-voltage equipment box, and the front part of each frame member is connected to a cross member of the vehicle body In addition, there is known one in which a rear portion is connected to a side frame of a vehicle body (for example, see Patent Document 1). The front part of each frame member is also connected by a cross beam attached to the rear lower part of the housing. High-voltage electrical components such as a battery and an inverter housed in the housing are supported by the vehicle body via the housing, the frame member, and the cross beam.
JP 2003-146088 A

However, in the configuration as described above, since the high-voltage electrical component is supported via the casing, the frame member, the cross beam, etc. are likely to be a high-rigidity and large-sized member to supplement the rigidity of the casing. As a result, the vehicle weight and cost may increase, and the space inside the vehicle may be reduced. Against this background, there is a demand for a configuration that can support a high-voltage mounting box without using dedicated parts such as the frame member and cross beam.
Therefore, the present invention provides an on-vehicle structure of a high-piezoelectric equipment box that can suppress the number of parts, the vehicle weight, and the cost, and can secure a sufficient space in the vehicle.

As a means for solving the above-mentioned problems, the invention described in claim 1 is characterized in that a high-voltage electrical component such as a battery (for example, the battery module 22 of the embodiment) and an inverter (for example, the inverter unit 23 of the embodiment) is provided with a casing (for example, the In a vehicle-mounted structure of a high-voltage mounting box (for example, the high-voltage mounting box 20 of the embodiment) housed in the case 21), a cross member (for example, the rear cross member 22 of the embodiment) and a parcel (for example, the rear parcel of the embodiment) 23) and the casing is attached to the vehicle body together with the high-voltage electrical component , and the cross member is a shelf that receives the weight of the high-voltage electrical component (for example, in the embodiment) A shelf 45) is provided.

According to this configuration, high-voltage electrical components such as a battery and an inverter, which are relatively heavy objects, are directly supported by the skeleton member of the vehicle body, so that a dedicated component for supporting or reinforcing the housing becomes unnecessary.
In addition, since the space for arranging the dedicated parts is not required, a sufficient space in the vehicle can be secured.
In addition, since the casing is attached to the vehicle body together with the high voltage electrical equipment parts, the on-vehicle work of the high voltage electrical equipment box can be facilitated.
And when attaching high-voltage components that are relatively heavy to the vehicle body, it is possible to work with these weights received by the shelf, so the high-voltage components are the lower limit of the mounting tolerance. There is no such thing as being biased to the position.

  The invention described in claim 2 is characterized in that the high-voltage equipment box is disposed obliquely behind a rear seat (for example, the rear seat 6 of the embodiment).

  According to this configuration, the high piezoelectric equipment box is arranged behind the rear seat, that is, in the trunk. At this time, the high piezoelectric equipment box is disposed obliquely along the seat back of the rear seat, thereby suppressing the influence on the trunk capacity.

The invention described in claim 3 is characterized in that the cross member is provided with a side wall portion (for example, the side wall portion 51 of the embodiment) for positioning the high-voltage electrical component in the longitudinal direction of the cross member. .

According to this configuration, when mounting the high piezoelectric component to the vehicle body, the positioning in the vehicle width direction is performed by the side wall portion, so that the in-vehicle workability of the high piezoelectric component, and by extension, the high piezoelectric component box is further improved.

According to the first aspect of the present invention, a dedicated component for supporting or reinforcing the casing is not required, and therefore, the number of components, vehicle weight, and cost increase can be suppressed. In addition, since the space for arranging the dedicated parts is not required, a sufficient space in the vehicle can be secured. In addition, it is possible to reduce the cost by reducing the number of on-board work steps for the high piezoelectric equipment box. In addition, it is possible to improve the in-vehicle workability of the high-piezoelectric equipment part, and thus the high-piezoelectric equipment box, and to absorb the mounting error of the high-piezoelectric equipment box satisfactorily.
According to the invention described in claim 2, it is possible to secure a sufficient trunk capacity without narrowing the passenger compartment.
According to the third aspect of the present invention, it is possible to further improve the on-vehicle workability of the high- piezoelectric equipment component, and thus the high- piezoelectric equipment box.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the directions such as front, rear, left and right in the following description are the same as those in the vehicle unless otherwise specified. In the figure, the arrow FR indicates the front side of the vehicle, and the arrow LH indicates the left side of the vehicle.

  A vehicle 1 shown in FIG. 1 is a hybrid vehicle that assists in driving an engine, which is an internal combustion engine, with a motor generator, and can recover power from the motor generator when the vehicle is decelerated. A power unit 3 in which the engine and a motor generator are provided in series is mounted in the engine room 2 at the front of the vehicle body. The motor generator is, for example, a three-phase AC motor, and the driving force of the motor generator and the engine is transmitted to the front wheels 4 that are driving wheels.

  Further, when the driving force is transmitted from the front wheels 4 to the motor generator during deceleration of the vehicle 1, the motor generator functions as a generator to generate a so-called regenerative braking force, and the kinetic energy of the vehicle 1 is converted into electric energy. As recovered. The recovered electrical energy is charged to the energy storage via the power converter.

  A compartment 7 having a front seat 5 and a rear seat 6 is provided behind the engine room 2. In addition, a trunk 8 is provided behind the compartment 7 through a compartment 7 and a seat back 6 a of the rear seat 6. The vehicle compartment 7 and the trunk 8 are both interior spaces. In the rear seat 6 a of the rear seat 6, that is, in the trunk 8, a high piezoelectric equipment box 20 connected to the power unit via the power cable 11 laid below the floor 9 is disposed.

  As shown in FIG. 2, a high voltage equipment box 20 includes a box-shaped case (housing) 21, a battery module (battery) 22 as the energy storage, and an inverter unit (inverter) as the power converter. 23 (see FIG. 3) or the like is accommodated. The inverter unit 23 obtains a direct current from the battery module 22 and converts the direct current into a three-phase alternating current, supplies the current to the motor generator to drive it, and converts the regenerative current from the motor generator into the direct current. The battery module 22 can be charged by converting to.

  The seat back 6a of the rear seat 6 is disposed along a plane H that is inclined so as to be positioned rearward as it is positioned upward, and a lower portion thereof is disposed on a rear cross member (cross member) 12 as a skeleton member of the vehicle body. The upper parts are respectively fixed to rear parcels (parcels) 13 as skeleton members of the vehicle body. Reference numeral 14 denotes a rear floor forming the floor surface of the trunk 8, reference numeral 15 denotes a side frame as a skeleton member of the vehicle body, and reference numeral 16 denotes a spare tire.

  The high piezoelectric equipment box 20 is disposed obliquely in a side view along the rear surface of the seat back 6a of the rear seat 6, and is long in the vehicle width direction (see FIG. 3) and flat in a direction substantially perpendicular to the plane H. It has a rectangular parallelepiped appearance. The external appearance of the high piezoelectric equipment box 20 is formed by the case 21. The high voltage equipment box 20 is not in contact with the rear floor 14, and a gap S is provided between them.

  Referring also to FIG. 3, the case 21 is made of, for example, a steel plate and closes the case main body 24 whose surface on the seat back 6a side is an opening 24a, and the left half and the right half of the opening 24a. It has a left cover 25 and a right cover 26 (shown only by reference numerals in FIG. 2). The battery module 22 is accommodated on the left side of the case 21 and the inverter unit 23 is accommodated on the right side.

  A flange portion 27 for fixing the case 21 to the vehicle body using bolts, clips, and the like is provided at the peripheral portion of the opening 24a of the case 21. That is, the case body 24 and the covers 25 and 26 are fastened together at the flange portion 27. Here, the flange portion 27 is fixed to the front wall portion 12a of the rear cross member 12, and to the front wall portion 13a of the rear parcel 13, respectively. These front wall portions 12a and 13a and the flange portion are provided along the plane H.

  An upper left outer fastening portion 31 and an upper left inner fastening portion 32 are provided in a portion of the flange portion 27 located at the upper left portion of the case. In addition, a lower left outer fastening portion 33 and a lower left inner fastening portion 34 are provided at a portion of the flange portion 27 located at the lower left portion of the case. The upper left outer fastening portion 31 and the lower left inner fastening portion 32 are provided at substantially the same position in the vehicle width direction, respectively.

  On the other hand, a right upper outer fastening portion 35 and an upper right inner fastening portion 36 are provided at a portion of the flange portion 27 located on the upper right side of the case. Further, a lower right outer fastening portion 37 and a lower right inner fastening portion 38 are provided at a portion of the flange portion 27 located at the lower right portion of the case. The upper right outer fastening portion 35 and the upper right inner fastening portion 36 are provided at substantially the same position in the vehicle width direction, respectively.

  The battery module 22 includes, for example, a plurality of small batteries 22a extending in the vehicle width direction, and a pair of battery side stays arranged inside the case of the left cover 25 in a state where the small batteries 22a are bundled together. 41. The battery side stays 41 extend substantially vertically along the inner surface of the left cover 25. The battery side stays 41 are arranged side by side in the vehicle width direction and are integrated with the left cover 25. Combined. Thereby, each battery side stay 41, the left cover 25, and the battery module 22 are handled as an integral unit.

  The upper end portion and the lower end portion of the battery side stay 41 located on the outer side in the vehicle width direction are provided so as to overlap the upper left outer fastening portion 31 and the lower left outer fastening portion 33, respectively, and the battery side stay 41 located on the inner side in the vehicle width direction. The upper end portion and the lower end portion are provided so as to overlap the upper left inner fastening portion 32 and the lower left inner fastening portion 34, respectively. The fastening portions 31 to 34 and the upper and lower end portions of the battery side stays 41 are fastened to the vehicle body by bolts B, so that the battery module 22 and the case 21 and the battery module 22 are connected to the vehicle body (rear) via the battery side stays 41. It is directly fixed to the parcel 13 and the rear cross member 12).

  The inverter unit 23 is configured by integrally forming an inverter main body, a DC / DC converter, an ECU, and the like via a base frame (not shown). The inverter side stays 42 corresponding to the respective fastening portions 35 to 38 on the right side of the case are provided on the outer peripheral portion of the inverter unit 23. Each inverter side stay 42 is configured integrally with the base frame, and is provided so as to overlap the corresponding fastening portions 35 to 38 respectively. These inverter side stays 42 are fastened to the vehicle body by the fastening portions 35 to 38 and bolts B, so that together with the case 21, the inverter unit 23 is connected to the vehicle body (rear parcel 13 and rear cross member via the inverter side stays 42. 12) directly fixed.

  A predetermined gap is formed between the battery module 22 and the inverter unit 23 and the case 21, and cooling air can be circulated in the case 21 using this gap. That is, the case 21 is for covering the battery module 22 and the inverter unit 23, and the battery module 22 and the inverter unit 23 are supported by the vehicle body without the case 21.

  Support brackets 44 that are in contact with the lower end portions of the stays 41 and 42 are provided at portions below the fastening portions 33, 34, 37, and 38 on the lower side of the case. Each support bracket 44 is formed by bending the upper half of a substantially square steel plate, and the upper half of the support bracket 44 is a shelf 45 that projects substantially forward from the front wall 12a of the rear cross member 12. The lower half is a joint 46 along the front wall 12 a of the rear cross member 12. This joint 46 is joined to the front wall 12a of the rear cross member 12 by welding or the like.

  As shown in FIGS. 4 to 6, lower wall portions 41a and 42a formed by bending substantially forward are provided at the lower ends of the stays 41 and 42, respectively (see FIG. 2). Each lower wall part 41a, 42a forms the lower surface which contact | abuts the upper surface of the shelf part 45 of the corresponding support bracket 44, respectively, The state which made these each shelf part 45 and lower wall part 41a, 42a contact | abut The corresponding support brackets 44 receive the weights of the battery module 22 and the inverter unit 23.

  The battery module 22 and the inverter unit 23 can be coupled to the case 21 using coupling means other than the bolt B. Thus, each support bracket 44 receives the weight of the case 21 together with the weight of the battery module 22 and the inverter unit 23. Reference numeral N denotes a nut for connecting the inverter side stay 42 and the case main body 24, and reference numeral L denotes a locating hole for connecting each support bracket 44 to the rear cross member 12.

Each support bracket 44 is the same component, and is arranged so that the upper surface of the shelf 45 has substantially the same height (see FIG. 3).
Here, as shown in FIGS. 5 and 7, the inverter side stay 42 corresponding to the lower right inner fastening portion 38 is provided with a protruding portion 47 that protrudes downward from the right side portion to avoid the support bracket 44. The projecting portion 47 has a side wall portion 47a smoothly connected to the lower wall portion 42a via the curved portion R, and a left side surface of the side wall portion 47a of the support bracket 44 positioned below the inverter side stay 42. It is possible to contact the right end. A notch 45a is formed in the shelf 45 of the support bracket 44 so as to avoid interference with the curved portion R.

  As shown in FIGS. 3 and 8, a guide bracket having a contact surface with the outer side surface of the left side wall portion 21b at a portion adjacent to the left side wall portion 21b of the case 21 in the upper wall portion 12b of the rear cross member 12. 48 is provided. The guide bracket 48 includes a joint portion 49 along the upper wall portion 12b of the rear cross member 12, and a side wall portion 51 that stands at the right end portion of the joint portion 49 and forms the contact surface. A locking portion 52 to the upper wall portion 12b is provided at the left end portion of the bonding portion 49, and the bonding portion 49 is coupled to the upper wall portion 12b by welding or the like while being positioned by the locking portion 52. . Reinforcing flanges 53 for maintaining the shape of the guide bracket 48 are provided at the edges of the joint portion 49 and the side wall portion 51.

  The left side surface of the projecting portion 47 and the right side end of the support bracket 44 are brought into contact with each other, and the contact surface of the guide bracket 48 and the outer surface of the case 21 are brought into contact with each other. It is positioned in the direction.

  As shown in FIGS. 2, 7, and 8, the shelf 45 of the support bracket 44 is formed to have a substantially U-shaped cross section and extend in the vehicle width direction. The lower end edge of the shelf 45 is connected to the rear cross member 12 by connecting to the upper end edge of the joint 46. On the other hand, the upper end edge of the shelf 45 is a free end that is not coupled to other members. Thus, the shelf 45 can support the high-voltage equipment box 20 using its own elasticity, and absorbs an attachment error in the direction along the plane H when the high-voltage equipment box 20 is attached to the vehicle body. It is easy.

  Next, the procedure for attaching the high-voltage mounting box 20 to the vehicle body will be described. First, the battery module 22 and the inverter unit 23 are accommodated in the case 21, and these are integrally coupled using the nut or the like. In this state, the bolt holes of the left cover 25 and the battery side stay 41 overlap the bolt holes of the fastening portions 31 to 34 on the left side of the case, and the bolt holes of the inverter side stay 42 and the fastening portions 35 to 38 on the right side of the case. The bolt holes overlap.

  The high-voltage equipment box 20 in the above state is introduced into the vehicle from, for example, the left rear entrance of the vehicle body and attached to a predetermined position behind the seat back 6a of the rear seat 6. At this time, the positioning in the direction along the plane H (substantially up and down) is such that the battery module 22 and the inverter unit 23 abut the lower ends of the stays 41 and 42 against the shelf 45 of each support bracket 44 due to their own weight. It is made by letting. In this state, each support bracket 44 receives the weight of the battery module 22 and the inverter unit 23.

In addition, the positioning (substantially front-rear direction) of the high-voltage mounting box 20 in the direction orthogonal to the plane H is performed by attaching the fastening portions 31 to 38 to the front wall portion 12a of the rear cross member 12 and the front wall portion 13a of the rear parcel 13. This is done by bringing the flange portion 27 of the containing case 21 into contact.
The positioning of the high piezoelectric equipment box 20 in the vehicle width direction is performed by bringing the projecting portion 47 of the inverter side stay 42 and the support bracket 44 into contact with each other and bringing the guide bracket 48 and case 21 into contact with each other as described above. Made.

  When the positioning of the high piezoelectric equipment box 20 is completed, the right cover 26 is attached to the case body 24, and then the bolts B are inserted into the bolt holes of the fastening portions 31 to 38 and the stays 41 and 42, and these are connected to the rear cross member. 12 and the rear parcel 13 are fastened to nuts set in advance, and the attachment of the high-voltage mounting box 20 to the vehicle body is completed. In this state, the weight of the high piezoelectric equipment box 20 is received by the fastening force of the bolt B.

  At this time, since the bolts B can be tightened in a state where the weights of the high-voltage mounting boxes 20 are received by the support brackets 44, for example, the bolts B are tightened and fixed while receiving the weights of the high-voltage mounting boxes 20. In such a case, the stays 41 and 42 and the fastening holes 31 to 38 are not fixed at a position that is the lower limit of the mounting error absorption range of the high piezoelectric equipment box 20 by the bolt holes.

  As described above, the in-vehicle structure of the high voltage equipment box 20 in the above embodiment is for mounting the high voltage equipment box 20 in which high voltage equipment parts such as the battery module 22 and the inverter unit 23 are accommodated in the case 21. The high-voltage electrical component is directly attached to the rear cross member 12 and the rear parcel 13 of the vehicle body, and the case 21 is attached to the vehicle body together with the high-voltage electrical component.

According to this configuration, the high-voltage components such as the battery module 22 and the inverter, which are relatively heavy objects, are directly supported by the rear cross member 12 and the rear parcel 13 that are the skeleton members of the vehicle body. Dedicated parts for reinforcement are not required. For this reason, there is an effect that the number of parts, vehicle weight, and cost increase can be suppressed.
Further, since the space for arranging the dedicated parts is not required, there is an effect that a sufficient space in the vehicle can be secured.
In addition, since the case 21 is attached to the vehicle body together with the high-piezoelectric equipment parts, the in-vehicle work of the high-piezoelectric equipment box 20 can be facilitated. There is.

  In the in-vehicle structure of the high voltage equipment box 20, the high voltage equipment box 20 is disposed obliquely behind the rear seat 6, so that the high voltage equipment box 20 is disposed in the trunk 8 behind the rear seat 6. It becomes. At this time, the high-voltage equipment box 20 is disposed obliquely along the seat back 6a of the rear seat 6, thereby suppressing the influence on the trunk capacity. For this reason, there is an effect that a sufficient trunk capacity can be secured without narrowing the passenger compartment 7.

  Furthermore, in the in-vehicle structure of the high-voltage equipment box 20 described above, the rear cross member 12 is provided with a shelf 45 that receives the weight of the high-voltage equipment parts, so that a relatively heavy high-voltage equipment part can be attached to the vehicle body. These weights can be reasonably received by the shelf 45 via the respective stays 41 and 42, and work can be performed in that state. As a result, it is possible to prevent the high-voltage electrical component from being biasedly attached to a position that is the lower limit of the mounting tolerance without using additional equipment or jigs. For this reason, it is possible to improve the in-vehicle workability of the high-piezoelectric equipment part and, consequently, the high-piezoelectric equipment box 20 and to effectively absorb the mounting error of the high-piezoelectric equipment box 20.

  The present invention is not limited to the above-described embodiment. For example, the shelf 45 is not provided on the support bracket 44 which is separate from the rear cross member 12, but is formed integrally with the rear cross member 12. It may be. Moreover, the energy storage with which the high piezoelectric equipment box 20 is provided may include a capacitor. Moreover, the applicable vehicle is not limited to a hybrid vehicle, and may be an electric vehicle that runs only by a motor generator. And the structure in the said Example is an example, and it cannot be overemphasized that a various change is possible in the range which does not deviate from the summary of invention.

1 is a schematic side view of a vehicle in an embodiment of the present invention. FIG. 2 is an enlarged view around a rear seat in FIG. 1. It is the arrow line view which looked at the high piezoelectric equipment box from the arrow A direction in FIG. FIG. 4 is an enlarged view of the vicinity of an inverter side stay on the outer side in the vehicle width direction in FIG. 3. FIG. 4 is an enlarged view of the vicinity of an inverter side stay inside the vehicle width direction in FIG. 3. FIG. 4 is an enlarged view around a battery side stay in FIG. 3. It is a perspective view of the inverter side stay periphery inside a vehicle width direction. It is a perspective view around a guide bracket.

Explanation of symbols

6 Rear seat 12 Rear cross member (cross member)
13 Rear parcel (Parcel)
20 High voltage box 21 Case (housing)
22 Battery module (battery)
23 Inverter unit (inverter)
45 shelves

Claims (3)

In the in-vehicle structure of a high voltage equipment box in which high voltage equipment such as a battery and an inverter are housed in a housing,
The high-voltage electrical component is directly attached to a cross member and a parcel of a vehicle body, and the housing is attached to the vehicle body together with the high-voltage electrical component ,
An in-vehicle structure for a high-voltage equipment box, wherein the cross member is provided with a shelf portion on which a contact surface for receiving the weight of the high-voltage equipment part is formed . The on-vehicle structure of the high-voltage equipment box according to claim 1, wherein the high-voltage equipment box is disposed obliquely behind the rear seat. The in-vehicle structure of the high-voltage equipment box according to claim 1 or 2, wherein the cross member is provided with a side wall portion for positioning the high-voltage equipment part in a longitudinal direction of the cross member.

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