Vehicle battery unit arrangement structure

Abstract

The present invention provides a battery unit arrangement structure for a vehicle, in which a battery unit (6) is arranged in front of a passenger seat and space for the passenger seat occupant's feet is ensured. The structure comprises: an instrument panel longitudinal wall portion (4) that divides a vehicle cabin (1) and an engine compartment (11), a floor (2) that forms the floor of the vehicle cabin (1), and a curved corner portion (5) that connects the lower end of the instrument panel longitudinal wall portion (4) to the front end of the floor. The battery unit (6) is mounted on the corner portion (5) in front of the passenger seat with its upper surface tilted downward toward the rear of the vehicle in a manner that its rear end is lower than its front end, and the battery unit (6) is covered from above by a cover component (8) that tilts downward toward the rear of the vehicle in a manner that its rear end is lower than its front end.

Description

Technical Field

[0001] The present invention relates to a battery unit arrangement structure for a vehicle. Background Art

[0002] Patent Document 1 describes a storage space provided below the instrument panel in front of the passenger seat of a vehicle, where an onboard battery and other onboard equipment are placed. The onboard battery is held by a battery holder and placed in the storage space. The battery holder has a recessed portion at the lower end for holding the onboard battery and a rear wall panel located at the rear end of the recess. This vertical wall separates the storage space from the passenger's foot space.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2011-88503

[0006] Technical problem to be solved by the invention

[0007] However, to ensure sufficient space for the passenger's feet, the onboard battery is preferably placed as far forward as possible below the instrument panel. However, if the onboard battery is placed on the floor as in Patent Document 1, the position where the onboard battery can be placed is limited, thus narrowing the space for the passenger's feet, which may cause the passenger to feel a sense of oppression. Summary of the Invention

[0008] Therefore, the present invention provides a structure in which a battery unit is arranged in front of a passenger seat and space for the passenger's feet is ensured.

[0009] Technical means for solving technical problems

[0010] To achieve the above object, the present invention provides a curved corner portion connecting the instrument panel vertical wall portion and the floor, and arranges a battery unit in the corner portion with the upper surface thereof inclined downward toward the rear of the vehicle.

[0011] Specifically, the battery unit arrangement structure for a vehicle disclosed herein comprises: an instrument panel vertical wall portion that divides a vehicle cabin and an engine compartment;

[0012] a floor panel forming a floor of the vehicle compartment; and

[0013] a curved corner portion connecting the lower end of the instrument panel vertical wall portion and the front end of the floor panel,

[0014] The battery unit is installed in the corner portion in front of the passenger seat with its upper surface tilted downward toward the rear of the vehicle so that its rear end is lower than its front end.

[0015] The battery unit is covered from above by a cover member that is tilted downward toward the rear of the vehicle so that the rear end is lower than the front end.

[0016] Thus, the battery cell is arranged so that its upper surface slopes downward toward the rear of the vehicle, taking advantage of the curved shape of the corner portion. This allows the battery cell to be arranged closer to the longitudinal wall of the instrument panel than if its upper surface were arranged horizontally. This increases the space for the passenger's feet. Furthermore, the upper portion of the cover member, which slopes downward toward the rear of the vehicle, can be used as a footrest for the passenger. This improves livability and reduces the feeling of oppression felt by passengers in the passenger seat.

[0017] In one embodiment, a space is provided between the battery unit and the instrument panel vertical wall portion.

[0018] This prevents the instrument panel vertical wall from contacting the battery unit when the instrument panel vertical wall moves rearward in response to a frontal collision of the vehicle. This mitigates the impact on the battery unit caused by the frontal collision of the vehicle.

[0019] Furthermore, since the battery unit is arranged with its upper surface inclined downward toward the vehicle rear by utilizing the curved shape of the corner portion, a gap can be created between the upper portion of the battery unit and the instrument panel vertical wall even if the battery unit is arranged toward the front.

[0020] In one embodiment, the battery unit includes: a mounting bracket fixed to the corner portion; a battery placed on the mounting bracket; and a battery pressure plate resting on the battery from above and fastened to a fastening portion of the mounting bracket extending outward from the battery.

[0021] The mounting bracket is provided with a cover member fixing portion for fixing an edge portion of the cover member.

[0022] This allows the cover member to be fixed to the vehicle body without the fixing edge of the cover member expanding outward from the mounting bracket, which contributes to compactness of the cover member.

[0023] In one embodiment, the cover member fixing portion is arranged adjacent to a fixing portion of the mounting bracket to the corner portion.

[0024] If the support rigidity of the cover member is low, a passenger who places his feet on the upper portion of the cover member may feel a sense of discomfort. According to this embodiment, the support rigidity of the cover member can be increased, thereby reducing the passenger's sense of discomfort.

[0025] In one embodiment, an onboard device is provided, which is adjacent to the battery unit in the vehicle width direction and is supplied with power from the battery unit.

[0026] The battery unit and the vehicle-mounted device are covered from above by the cover member.

[0027] This allows the battery unit and onboard equipment to be efficiently arranged together using the larger space in the vehicle width direction at the corner. Furthermore, the wiring harness for supplying power to the onboard equipment can be shortened, making the electrical connections compact.

[0028] In one embodiment, a main battery is disposed in the engine room, and the battery unit is a sub-battery having a smaller capacity than that of the main battery.

[0029] Effects of the Invention

[0030] According to the present invention, since the battery unit is arranged at the corner with its upper surface inclined toward the rear of the vehicle, the battery unit can be arranged in front of the passenger seat while ensuring space for the passenger seat occupant's feet. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a rear view showing the area in front of the passenger seat.

[0032] Figure 2 yes Figure 1 Cross-sectional view at line II-II.

[0033] Figure 3 yes Figure 2 A schematic diagram of the main parts.

[0034] Figure 4 It is a plan view in which the corner portion of the floor mat and the cover member is omitted.

[0035] Figure 5 Observed from the rear Figure 4 Stereoscopic image.

[0036] Figure 6 Observed from the upper right Figure 4 Stereoscopic image.

[0037] Figure 7 It is equivalent to omitting the auxiliary battery, BPS and PCM. Figure 4 Picture.

[0038] Figure 8 It is equivalent to the wiring of the wiring harness. Figure 4 Picture.

[0039] Figure 9 It is equivalent to the wiring of the wiring harness. Figure 5 Picture.

[0040] Figure 10 It is equivalent to the wiring of the wiring harness. Figure 6 Picture.

[0041] Figure 11 It is a plan view with the corner portion of the floor mat omitted.

[0042] Figure 12 Observed from the rear Figure 11 Stereoscopic image.

[0043] Figure 13 Observed from the upper right Figure 11 Stereoscopic image.

[0044] Explanation of symbols

[0045] 1 Carriage

[0046] 11 Engine Room

[0047] 12 Storage Space

[0048] 2 Floor

[0049] 24 floor mats

[0050] 3 Dashboard

[0051] 4 Instrument panel longitudinal wall

[0052] 5 Corner

[0053] 6 battery cells

[0054] 8 Cover parts DETAILED DESCRIPTION

[0055] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the application or use of the present invention.

[0056] <Lower structure in front of the passenger seat>

[0057] Figure 1 The figure shows the front of the passenger seat of the vehicle. Figure 1 A floor 2 is provided to form a floor extending substantially horizontally. At the center of the floor 2 in the vehicle width direction ( Figure 1 left side), upward ( Figure 1 The tunnel portion 21 is provided with a recessed portion extending in the front-rear direction. A transmission shaft 22 extending in the front-rear direction is provided in the tunnel portion 21. Figure 1A rocker 23 extending in the front-rear direction is provided (right side in the center). The rocker 23 is formed by welding a rocker inner panel with a hat-shaped cross section that opens outward in the vehicle width direction and a rocker outer panel with a hat-shaped cross section that opens inward in the vehicle width direction to each of their upper and lower flanges with a rocker reinforcement interposed therebetween.

[0058] like Figure 1 As shown, an instrument panel 3 extending in the vehicle width direction is provided in front of the passenger seat. A glove box 31 for the passenger seat is mounted on the instrument panel 3. The space below the glove box 31 is provided for the passenger seat occupant's feet. A floor mat 24 is provided in the passenger seat occupant's foot space.

[0059] Figure 2 and Figure 3 The structure in front of the passenger's foot space is shown. Figure 2 and Figure 3 As shown, the vehicle interior 1 is separated from the engine compartment 11 by the instrument panel vertical wall 4. An instrument panel insulator 41 is provided between the instrument panel vertical wall 4 and the instrument panel 3 to prevent noise generated in the engine compartment 11 and other components from being transmitted to the instrument panel 3. The instrument panel insulator 41 is formed of, for example, felt or nonwoven fabric.

[0060] A dashboard reinforcement 42 having a hat-shaped cross section and an opening on the dashboard vertical wall 4 side is provided on the vehicle front side (right side in the figure) of the dashboard vertical wall 4. The dashboard reinforcement 42 is provided so as to extend in the vehicle width direction.

[0061] like Figure 2 and Figure 3 As shown, the lower end of the instrument panel vertical wall 4 is connected to the front end of the floor 2 by a corner plate, which forms a curved corner portion 5 extending in the vehicle width direction. A floor reinforcement 51 is provided on the upper surface of the corner portion 5, which is curved along the corner portion and extends in the front-rear direction. Figures 4 to 6 As shown, the floor reinforcement 51 is formed into a hat-shaped cross section with an opening at the bottom and is arranged to be inclined toward the vehicle width direction inner side from the rear toward the front. In addition, the front end of the floor reinforcement 51 is connected to the instrument panel vertical wall portion 4.

[0062] <Vehicle battery unit layout structure>

[0063] A large-capacity main battery (not shown) is disposed in the engine room 11 of the vehicle of this embodiment. Figures 2 to 6 As shown in FIG, the sub-battery 60 with relatively small capacity is arranged at the corner portion 5. Figures 4 to 6 As shown, at the corner portion 5, a powertrain control module 70 (hereinafter referred to as PCM 70) and a battery power supply 71 (hereinafter referred to as BPS 71) are arranged adjacent to the inner side of the battery unit 6 in the vehicle width direction. Figure 2 and Figure 3 As shown, the sub-battery 60 , the PCM 70 , and the BPS 71 are covered from above by a cover member 8 .

[0064] In this manner, the sub-battery 60, PCM 70, and BPS 71 are efficiently arranged together using the wide space in the vehicle width direction at the corner portion 5. Therefore, the electrical connections to the sub-battery 60, PCM 70, and BPS 71 can be made compact.

[0065] Battery Cell Structure

[0066] like Figure 2 and Figure 3 As shown, the battery unit 6 is a unit of a sub-battery 60 . The battery unit 6 includes the sub-battery 60 , a battery mounting bracket 61 on which the sub-battery 60 is mounted, and a battery pressing plate 62 for holding the sub-battery 60 on the battery mounting bracket 61 .

[0067] The sub-battery 60 is a rectangular box-shaped member whose dimensions in the vertical direction and the front-rear direction are longer than its dimension in the vehicle width direction. Figure 4 As shown in FIG. 1 and FIG. 2 , a harness connection portion 601 is provided on the upper surface of the sub-battery 60 .

[0068] like Figure 2 、 Figure 3 and Figure 7 As shown, the battery mounting bracket 61 has a loading surface 611 for loading the auxiliary battery 60. The loading surface 611 is arranged along the floor reinforcement 51. In addition, a rear portion 612 is provided at the rear of the loading surface 611, extending rearward along the floor reinforcement 51. Floor reinforcement fixing portions 613 that are recessed downward are provided on the loading surface 611 and the rear portion 612. The floor reinforcement fixing portions 613 are fastened to the floor reinforcement 51 by mounting bolts. In addition, a cover member fixing portion 614 for fixing the cover member 8 is provided adjacent to the floor reinforcement fixing portion 613 provided at the rear portion 612. The cover member fixing portion 614 is convex and upward.

[0069] like Figures 4 to 7 As shown, the vehicle widthwise outer sides of the mounting surface 611 and rear portion 612 are bent downward, and a bracket outer portion 615 is provided at its lower end, extending outward in the vehicle widthwise direction along the corner portion 5. Downwardly recessed fixing portions 616 are provided on the front and rear sides of the bracket outer portion 615. These fixing portions 616 are fastened to the corner portion 5 by mounting bolts. Adjacent to the rear side of the fixing portions 616 provided on the front side of the bracket outer portion 615 is a cover member fixing portion 614 for fixing the cover member 8. The cover member fixing portion 614 is convex and upwardly convex.

[0070] like Figure 2 and Figure 3As shown, a front rising portion 617 is provided at the front end of the placement surface 611. A front fastening portion 6171 is provided at the upper end of the front rising portion 617, extending toward the front of the vehicle.

[0071] like Figures 4 to 7 As shown, an inner rising portion 618 is provided at the end portions in the vehicle width direction inner side of the placement surface 611 and the rear portion 612. An upper fastening portion 6181 is provided at the upper end of the inner rising portion 618 so as to extend inward in the vehicle width direction.

[0072] like Figures 2 to 6 As shown, the battery pressure plate 62 rests from above on the sub-battery 60 placed on the mounting surface 611 of the battery mounting bracket 61. The battery pressure plate 62 has an abutment portion 621 that contacts the upper surface of the sub-battery 60, and a bent portion 622 that bends downward from the rear end of the abutment portion 621. The lower end of the bent portion 622 bends toward the rear of the vehicle.

[0073] The front end of the abutment portion 621 of the battery pressure plate 62 extends above the front raised portion 617 of the battery mounting bracket 61 and is fastened to the front fastening portion 6171 of the front raised portion 617 by mounting bolts. Furthermore, the lower end of the bent portion 622 of the battery pressure plate 62 is fastened to the rear portion 612 of the battery mounting bracket 61 by mounting bolts. In this manner, by fastening the front and rear ends of the battery pressure plate 62 to the battery mounting bracket 61, the sub-battery 60 is supported by the battery mounting bracket 61.

[0074] The sub-battery 60, supported as described above, is mounted to the corner portion 5 via a battery mounting bracket 61. Taking advantage of the curved shape of the corner portion 5, the sub-battery 60 is mounted at an angled position, with the rear end of the upper surface of the sub-battery 60 positioned below the front end. This allows the sub-battery 60 to be positioned close to the instrument panel vertical wall 4. This placement of the sub-battery 60 increases the space available for the passenger's feet.

[0075] Moreover, if Figure 2 and Figure 3 As shown, because the upper surface of the sub-battery 60 slopes downward toward the rear of the vehicle, even when the sub-battery 60 is positioned close to the instrument panel vertical wall 4, a gap can be maintained between the upper portion of the sub-battery 60 and the instrument panel vertical wall 4. Therefore, if the instrument panel vertical wall 4 moves rearward (leftward in the figure) due to the impact of a vehicle collision (frontal collision), the instrument panel vertical wall 4 and the sub-battery 60 can be prevented from contacting each other. This mitigates the impact on the sub-battery 60 during a frontal collision.

[0076] PCM and BPS Structures

[0077] like Figures 4 to 6As shown, a PCM 70 and a BPS 71 as vehicle-mounted equipment are arranged on the vehicle widthwise inner side of the sub-battery 60 in the corner portion 5. The PCM 70 and BPS 71 are mounted on the corner portion 5 via a vehicle-mounted equipment bracket 72 in a vertically stacked state.

[0078] The PCM 70 and BPS 71 are rectangular box-shaped components whose length and width are longer than their thickness. The PCM 70 is longer in the front-to-back direction than in the vehicle width direction. The BPS 71 is substantially square when viewed from above and below.

[0079] Although not shown, the PCM 70 is comprised of a microprocessor equipped with a CPU, memory, a counter-timer group, an interface, and a bus connecting these components. The PCM 70 is a device for controlling the vehicle's operation, such as controlling the engine and motor drive. A PCM-side connector 701 for connecting a wiring harness is located on the outside of the PCM 70 in the vehicle width direction. Furthermore, PCM fixing portions 702 for securing the PCM 70 are located on the front and rear sides of the PCM 70.

[0080] Although not shown, the BPS 71 includes a step-up DC / DC converter, multiple relay circuits, and other components. If the main battery in the engine compartment 11 fails, the BPS 71 switches the relay circuits to enable power supply from the slave battery 60. The BPS 71 also monitors the status of the slave battery 60. Therefore, when charging of the slave battery 60 is necessary, the BPS 71 switches the relay circuits to charge the slave battery 60. A BPS-side connector 711 for connecting a wiring harness is provided on the rear side of the BPS 71. Furthermore, BPS fixing portions 712 for securing the BPS 71 are provided on both sides of the BPS 71 in the vehicle width direction.

[0081] like Figure 7 As shown, the vehicle-mounted equipment bracket 72 is composed of a first bracket 721, a second bracket 722 and a third bracket 723. The first bracket 721 is provided with a rear ( Figure 7 Middle is the lower side) toward the front ( Figure 7 The first bracket 721 is arranged in a manner that it is inclined toward the outside in the vehicle width direction. Figure 7 The left side is in the middle) and the outer side in the vehicle width direction ( Figure 7 The first bracket fixing portion 7211 is fastened to the corner portion 5 by mounting bolts on the inner side in the vehicle width direction. The first bracket fixing portion 7211 is fastened to the floor reinforcement 51 by mounting bolts on the outer side in the vehicle width direction.

[0082] The second bracket 722 is a generally C-shaped member with an opening on the vehicle widthwise outer side when viewed from above and below. The second bracket 722 has second bracket fixing portions 7221 at three locations: the front end, the inner side in the vehicle widthwise direction, and the outer side in the vehicle widthwise direction. The second bracket fixing portion 7221 at the front end is fastened to the first bracket 721 by mounting bolts. The second bracket fixing portions 7221 on the inner and outer sides in the vehicle widthwise direction are fastened to the corner portion 5 by mounting bolts.

[0083] The third bracket has a horizontally extending BPS mounting surface 7232. The inner side of this BPS mounting surface 7232 in the vehicle width direction is bent downward inward, and a third bracket fixing portion 7231 extending inward in the vehicle width direction is provided at its lower end. Furthermore, the outer side of the BPS mounting surface 7232 is bent downward in the vehicle front direction, and a third bracket fixing portion 7231 extending forward is provided at its lower end. The inner third bracket fixing portion 7231 is secured to the second bracket 722 by mounting bolts. Furthermore, the outer third bracket 723 overlaps with the first bracket fixing portion 7211 of the first bracket 721 and, together with the first bracket fixing portion 7211, is secured to the floor reinforcement 51 by mounting bolts.

[0084] like Figures 4 to 6 As shown, the PCM 70 is positioned between the second bracket 722 and the third bracket 723. The PCM 70 is secured to the second bracket 722 via the PCM fixing portion 702, which is fastened with mounting bolts. Furthermore, the BPS 71 is placed on the BPS mounting surface 7232 of the third bracket 723. The BPS 71 is secured to the third bracket 723 via the BPS fixing portion 712, which is fastened with mounting bolts. In this manner, the PCM 70 and BPS 71 are mounted on the corner portion 5 in a vertically overlapping state.

[0085] <Connecting the wiring harness>

[0086] use Figures 8 to 10 , the wiring of the wiring harness connecting the sub-battery 60 , the PCM 70 , and the BPS 71 will be described.

[0087] A main wiring harness 90 is located in front of the sub-battery 60, extending in the vehicle width direction. Multiple wiring harnesses are inserted into this main wiring harness 90. A power line connected to the main battery is also provided within the main wiring harness 90. An intermediate branching section 901 is located approximately in the middle of the main wiring harness 90, allowing the wiring harness to branch and distribute. Although not shown, the main wiring harness 90 is connected to the main battery on its outer side in the vehicle width direction.

[0088] The battery harness 91 connected to the harness connection portion 601 of the sub-battery 60 merges with the intermediate branch portion 901 of the main harness 90 via the mounting surface 611 of the battery mounting bracket 61. The battery harness 91 is fixed to the mounting surface 611 by a harness fixing member.

[0089] A BPS-side harness 92 is connected to the BPS-side connection portion 711 of the BPS 71. The BPS-side harness 92 joins the main harness 90 from its end portion on the vehicle widthwise inward of the inner rising portion 618 of the battery mounting bracket 61. The BPS-side harness 92 is secured to the inner rising portion 618 via a harness securing member. The battery-side harness 91 and the BPS-side harness 92 are electrically connected via the main harness 90. This allows power to be supplied from the sub-battery 60 to the BPS 71.

[0090] The PCM-side wiring harness 93, connected to the PCM-side connection portion 701 of the PCM 70, is arranged to extend inward in the vehicle width direction via the rear of the PCM 70. This PCM-side wiring harness 93 includes a PCM-side branch wiring harness 931 that branches midway. This PCM-side branch wiring harness 931 merges with the intermediate branch portion 901 of the main wiring harness 90 via the loading surface 611 of the battery mounting bracket 61. This PCM-side branch wiring harness 931, along with the battery-side wiring harness 91 described above, is secured to the loading surface 611 via wiring harness securing components. This PCM-side branch wiring harness 931 is electrically connected to the BPS-side wiring harness 92 via the main wiring harness 90. Therefore, by switching the relay circuit of the BPS 71, power can be supplied from the sub-battery 60 to the PCM 70 via the BPS 71.

[0091] <Cover parts>

[0092] like Figure 2 、 Figure 3 as well as Figures 11 to 13 As shown, the sub-battery 60, PCM 70 and BPS 71 are covered from above by the cover member 8. Figure 2 and Figure 3 As shown, the cover member 8 is tilted downward toward the rear of the vehicle so that the rear end (left side in the figure) of its upper surface is lower than the front end (right side in the figure). The upper surface of the cover member 8 has an upper surface front portion 81 on the front side and an upper surface rear portion 82 on the rear side that is located lower than the upper surface front portion 81.

[0093] like Figures 11 to 13 As shown, an inner cover fastening portion 83 extending inward in the vehicle width direction is provided at the inner end of the upper front portion 81 of the cover member 8. This inner cover fastening portion 83 is fastened to the cover member fixing base 211 fixed to the tunnel portion 21 by mounting bolts. The approximate center of the upper front portion 81 of the cover member 8 is fastened to the upper fastening portion 6181 provided on the inner rising portion 618 of the battery mounting bracket 61 by mounting bolts. A cover outer fastening portion 84 extending downward is provided on the outer side of the upper front portion 81 of the cover member 8 in the vehicle width direction. The lower end of this cover outer fastening portion 84 is fastened to the cover member fixing portion 614 provided on the bracket outer portion 615 by mounting bolts.

[0094] At the rear end of the upper rear portion 82 of the cover member 8, downwardly bent rear cover member fastening portions 85 are provided at three locations spaced apart in the vehicle width direction. Of these rear cover member fastening portions 85, those located on the inner and central sides in the vehicle width direction are fastened to the corner portion 5 by mounting bolts. Furthermore, the rear cover member fastening portions 85 located on the outer sides in the vehicle width direction are fastened to the cover member fixing portion 614 provided on the rear portion 612 of the battery mounting bracket 61 by mounting bolts.

[0095] To fix the cover member 8, the cover member fixing portion 614 provided on the battery mounting bracket 61 is adjacent to the fixing portion 616 or the floor reinforcement fixing portion 613 for fixing the battery mounting bracket 61 to the corner portion or the floor reinforcement 51. Therefore, the support rigidity of the cover member 8 is improved.

[0096] like Figure 2 and Figure 3 As shown, a floor mat 24 is provided on the upper surface of the cover member 8, following the inclination of the cover member 8. Therefore, the passenger in the front passenger seat can use the floor mat 24 as a footrest. This ensures sufficient space for the passenger's feet, alleviating the feeling of oppression felt by the passenger in the front passenger seat.

[0097] If the support rigidity of the cover member 8 is low, the passenger seat occupant may feel uncomfortable when placing their feet on the floor mat 24 above the cover member 8. As described above, by increasing the support rigidity of the cover member 8, the passenger seat occupant's uncomfortable feeling can be reduced.

Claims

1. A battery unit arrangement structure for a vehicle, characterized in that: have: an instrument panel longitudinal wall portion, the instrument panel longitudinal wall portion dividing the vehicle cabin and the engine compartment; a floor panel forming a floor of the vehicle compartment; and a curved corner portion connecting the lower end of the instrument panel vertical wall portion and the front end of the floor panel, The battery unit is installed in the corner portion in front of the passenger seat with its upper surface tilted downward toward the rear of the vehicle so that its rear end is lower than its front end. The battery unit is covered from above by a cover member, which is tilted downward toward the rear of the vehicle so that the rear end is lower than the front end. The battery unit comprises: a mounting bracket fixed to the corner portion; a battery placed on the mounting bracket; and a battery pressure plate resting on the battery from above and fastened to a fastening portion of the mounting bracket extending outward from the battery. The mounting bracket is provided with a cover member fixing portion for fixing the edge of the cover member. The cover member fixing portion is arranged adjacent to a fixing portion of the mounting bracket to the corner portion.

2. The vehicle battery unit arrangement structure according to claim 1, wherein: A space is provided between the battery unit and the instrument panel vertical wall portion.

3. The vehicle battery unit arrangement structure according to claim 1, wherein: An onboard device is provided, the onboard device being adjacent to the battery unit in the vehicle width direction and being supplied with power from the battery unit, The battery unit and the vehicle-mounted device are covered from above by the cover member.

4. The vehicle battery unit arrangement structure according to any one of claims 1 to 3, wherein: A main battery is arranged in the engine room. The battery unit is a sub-battery unit having a smaller capacity than the main battery.

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