JP5329895B2 - Straddle-type electric vehicle - Google Patents

Description

  The present invention exhibits a front fork that pivotally supports the front wheel at the lower end and a head pipe that supports the steering handle so that the steering wheel can be steered, a main frame that extends rearwardly downward from the head pipe, and power for rotationally driving the rear wheel. The present invention relates to a straddle-type electric vehicle including an electric motor.

A motorcycle is known from Patent Document 1 in which a battery for supplying electric power to an electric motor is disposed below a main frame extending downward from the head pipe.
JP 2003-182669 A

  However, in the one disclosed in Patent Document 1, the power for rotationally driving the rear wheel between the lower portion of the front bracket suspended from the main frame and the lower portion of the pivot frame extending downward from the rear end of the main frame. A motor unit having an electric motor that exhibits the above is attached, and the battery is disposed in a narrow space between the motor unit and the main frame, so that it is difficult to dispose a large battery.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a straddle-type electric vehicle capable of arranging a large battery.

To achieve the above object, a first aspect of the present invention includes a head pipe supporting a front fork and steering handle pivotally supported a front wheel at the lower end steerably, the main extending towards the rear from the head pipe A frame , a seat rail connected to the rear part of the main frame so as to support an occupant seat on which the occupant sits, a down frame continuously connected to the head pipe or the front end part of the main frame, and a main frame A pivot frame connected to the rear end of the frame and extending downward, a swing arm whose front end is pivotably connected to the pivot frame, and a rear wheel pivotally supported on the rear end of the swing arm straddle-type electric vehicle provided with an electric motor for rotationally driving said swing the electric motor whose rotational axis as the rear wheel coaxially The main frame is disposed at the rear end of the frame and extends obliquely downward from the head pipe, the down frame extending linearly in the vertical direction when viewed from the side of the vehicle, and the pivot frame. A main battery box having an upper surface along the main frame, a front surface along the down frame, a rear surface along the pivot frame, and a lower surface along the traveling road surface is disposed in the space, and the electric motor is disposed in the main battery box A plurality of main battery cells constituting a main battery for supplying electric power to the main battery box are arranged in alignment with the shape of the main battery box, and the road surface in the vehicle side view is between the lower frame and the lower end of the pivot frame. A lower frame extending in the front-rear direction in parallel with the main battery connects the lower ends. The connection state supporting the box and the connection release state in which the connection is released and the main battery box can be taken out downward are provided, and the main battery box is provided on the left and right sides of the front portion of the box. The lateral width is formed to be wider than the lateral width of the rear part of the box, and a pair of left and right steps for footrest are provided on the front side of the rear end of the rear part of the box. and it is disposed on the upper side than the lower end, characterized in Rukoto.

According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, electric power can be supplied to the electric motor instead of the main battery between the passenger seat and the seat rail. sub battery, an upper portion of the sub-battery than an upper end of a front portion of the main battery box you being arranged such that and high positions in the rear.

Note that the first space S1 of the embodiment corresponds to the space of the present invention.

According to the present invention, in the saddle-ride type electric vehicle, the space surrounded by the main frame, the down frame, and the pivot frame is made larger by arranging the electric motor on the rear wheel side than the space, and the large By arranging the battery in the space, a large battery can be arranged . In addition, since the electric motor is coaxially attached to the rear wheel and attached to the rear end portion of the swing arm, the electric motor can be arranged in a compact manner while securing a battery arrangement space.

Furthermore the plurality of battery cell that make up the main battery, since it is aligned in the main battery box in accordance with the shape of the main battery box, can store a lot of battery cell by the main battery box. Moreover, when the lower frame is disconnected, the main battery box can be taken out downward, and the maintenance work of the main battery is facilitated.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.

  1 to 5 show a first embodiment of the present invention. FIG. 1 is a left side view of a motorcycle, FIG. 2 is a view taken in the direction of the arrow 2 in FIG. 1, and FIG. 4 is a left side view of the motorcycle, FIG. 4 is a view taken in the direction of the arrow 4 in FIG. 3, and FIG.

  1 to 4, a body frame FA of a motorcycle, which is a saddle-type electric vehicle, includes a front fork 11 that pivotally supports a front wheel WF at a lower end and a bar-like operation connected to an upper portion of the front fork 11. A head pipe 13 that supports the steering handle 12 so as to be steerable, a pipe-shaped main frame 14 that extends rearwardly downward from the head pipe 13, and a pivot frame that is connected to the rear end of the main frame 14 and extends downward. 16 and a pair of left and right rear frames 17 connected to the rear end portion of the main frame 14 and extending rearward, and the rear portion of the main frame 14 and an intermediate portion between the rear frames 17. And a pair of inclined left and right seat rails 18.

  The rear frames 17 are integrally formed with an inclined portion 17a extending rearward from the rear end of the main frame 14 and a horizontal portion 17b extending horizontally rearward from the rear end of the inclined portion 17a. And the rear portions of both horizontal portions 17b are connected to each other. The rear ends of the seat rails 18 are connected to the rear upper portions of the inclined portions 17a of the rear frames 17.

  A front fender 20 that covers the front wheel WF from above is attached to the front fork 11, and a rear fender 21 that covers the rear wheel WR from above is attached to the rear frame 17. A main stand 22 is rotatably attached to the lower part of the pivot frame 16. Moreover, a front end portion of a swing arm 23 that pivotally supports the rear wheel WR is connected to the pivot frame 16 so as to be able to swing up and down, and the front portion of the horizontal portion 17b in the rear frame 17 Rear cushion units 24 are provided between the rear portions of the swing arm 23. Further, a loading platform 25 is provided on the horizontal portions 17b of the rear frames 17.

  An occupant seat 28 is disposed in front of the loading platform 25, and the occupant seat 28 is supported by the seat rails 18 through a seat support frame 19, and as shown in FIG. The seat 28 is supported by the seat support frame 19 so that it can be rotated forward. Thus, the seat support frame 19 includes a horizontal seat support portion 19a that supports the occupant seat 28, a front leg portion 19b that extends downward from the front portion of the seat support portion 19a, and a lower portion from the rear portion of the seat support portion 19a. A lower leg of the front leg 19b is fixed to the front part of the seat rail 18, and the lower end of the rear leg 19c is at the rear part of the inclined part 17a of the rear frame 17. It is fixed.

  By the way, the rear wheel WR is rotationally driven by the power exerted by the electric motor 29, and the main battery 30 for supplying electric power to the electric motor 29 is used for the main frame 14 and a part of the vehicle body frame FA. A first frame surrounded by a pivot frame 16 and a down frame 15 which is configured to be connected to the front end of the head pipe 13 or the main frame 14 (in this embodiment, the front end of the main frame 14) and extends downward. In the space S1 (see FIGS. 1 and 3). On the other hand, the electric motor 29 is arranged at a position different from the first space S1, and in this embodiment, the electric motor 29 is located behind the first space S1 and At the rear end portion, the rotation axis is arranged coaxially with the rear wheel WR.

  The main battery 30 is configured by coupling a plurality of main battery cells 31 to each other, and each main battery cell 31 is an upper surface substantially along the main frame 14 in the vehicle body frame FA. In the main battery box 32 disposed in the first space S1 surrounded by the main frame 14, the down frame 15 and the pivot frame 16, and arranged in alignment with the shape of the main battery box 32.

  Thus, the upper surface of the main battery box 32 is formed along the lower surface of the main frame 14 that extends rearwardly downward. In this embodiment, the upper surface of the main battery box 32 is formed so as to be lowered stepwise. The

Thus, the upper surface of the main battery box 32 extends along the lower surface of the main frame 14 that extends in a downwardly inclined manner , and the front surface of the box is a down frame 15 that extends linearly in the vertical direction when viewed from the side of the vehicle. And the rear surface of the box is formed along the pivot frame 16, and the lower surface of the box is formed along the road surface. In particular, the upper surface of the box is rearward in this embodiment. It is formed to become lower step by step as it goes.

  In addition, it is possible to connect the down frame 15 and the pivot frame 16 between the lower frame 15 and the lower part of the pivot frame 16 to support the main battery box 32, and to release the main battery box 32 by releasing the connection. In this embodiment, the rear part of the lower frame 33 can swing through the support shaft 34 at the lower part of the pivot frame 16. The front part of the lower frame 33 is detachably connected to the lower part of the down frame 15 by a detachable connection pin 35 or the like. That is, the lower frame 33 can be switched between a connected state in which the front part is connected to the down frame 15 and a disconnected state in which the front part is removed from the down frame 15. In the released state, the lower frame 33 is switched as shown in FIG. The main battery box 32 can be taken out downward by rotating the frame 33 so that the front portion thereof is at the lower position.

  In addition, elastic members 36 are interposed between the upper surface of the main battery box 32 supported by the coupled lower frame 33 and the vehicle body frame FA.

  A pair of left and right step frames 37, 37 extending forward from the pivot frame 16 are connected to the lower portion of the pivot frame 16, and a passenger seat 28 is provided at the front end of the step frames 37. Steps 38 and 38 are provided for the seated occupant to put their feet on.

  Thus, the main battery box 32 for storing the main battery 30 does not overlap the step frames 37 and 38 in a plan view as shown in FIGS. 2 and 4, and in this embodiment, Corresponding to the step frames 37... And the steps 38... Arranged on both sides of the rear part of the main battery box 32, the width of the main battery box 32, that is, the rear part of the main battery 30 is the width of the front part of the main battery box 32. Is set smaller. Moreover, in order to increase the capacity of the main battery 30, the main battery box 32 is formed to extend rearward so that the rear end portion thereof overlaps the step frame 37 in a side view.

  Further, electric power is supplied to the electric motor 29 in place of the main battery 30 in a second space S2 surrounded by the main frame 14 and the seat rails 18 and positioned below the passenger seat 28. As shown in FIG. 5, the sub battery 40 to be obtained is arranged so that the passenger seat 28 can be detached from the second space S <b> 2 while being rotated forward, and the sub battery 40 is surrounded by the seat support frame 19. It is. Thus, unlike the first space S1, the electric motor 29 is disposed at a position behind the first space S1, and is disposed at the rear end of the swing arm 23. The second space S2 is arranged at a different position.

  The sub-battery 40 is configured by connecting a plurality of sub-battery cells 41 to each other, and the sub-battery cells 41 are formed in accordance with the second space S2 to be second. The sub-battery box 42 arranged in the space S2 is aligned and arranged in accordance with the shape of the sub-battery box 42.

  The seat rail 18 in the vehicle body frame FA includes a first cooling fan that sucks the air heated by the main battery 30 to the rear side of the first space S1 and discharges it to the rear of the occupant seat 28. 43 is supported, and the main battery box 32 arranged in the first space S1 is formed so that the traveling wind from the front of the motorcycle can be introduced from the front and discharged from the rear upper part. .

  The rear leg portion 19c of the seat support frame 19 in the vehicle body frame FA sucks air warmed by the sub-battery box 42 disposed in the second space S2 from the second space S2, and the passenger seat A second cooling fan 44 that is discharged to the rear of 28 is supported.

  By the way, the left and right legs of the occupant sitting on the occupant seat 28 are covered from the front by leg shields 45, respectively. These leg shields 45 cover the main frame 14 from above and the main battery. A synthetic resin center cover 46 is integrally provided to cover the front portion of the box 32 from both sides. On the other hand, the seat rails 18, the seat support frame 19, the sub-battery box 42, and the second cooling fan 44 are arranged on both sides with a pair of left and right side covers 47 that are disposed below the passenger seat 28. Side covers 47 made of synthetic resin are connected to the center cover 46 and constitute a vehicle body cover 48 together with the center cover 46.

  Moreover, a drive circuit means 49 that receives the power supplied from the main battery 30 and the sub-battery 40 and drives the electric motor 29 is housed in one of the side covers 47, and the other of the side covers 47. A charging circuit means 50 for charging the main battery 30 is accommodated therein. A charging cord 51 is accommodated between the passenger seat 28 and the sub battery box 42.

  Next, the operation of the first embodiment will be described. A main battery 30 for supplying electric power to an electric motor 29 that exerts power for rotationally driving the rear wheels WR is connected to the front end portion of the main frame 14 and is disposed below. The electric motor 29 is disposed in the first space S1 that is disposed in the first space S1 that is surrounded by the extending down frame 15, the pivot frame 16 that is connected to the rear end portion of the main frame 14 and extends downward, and the main frame 14. Since the first space S1 is a large space and the main battery 30 is disposed in the large first space S1, the large main battery 30 can be disposed.

  The pivot frame 16 is connected to the rear end of a swing arm 23 that pivotally supports the rear wheel WR. The electric motor 29 has a rotation axis coaxial with the rear wheel WR. Since it is disposed at the rear end portion of the swing arm 23, the electric motor 29 can be disposed in a compact manner while ensuring the space for disposing the main battery 30.

  Further, a connection state in which the down frame 15 and the pivot frame 16 are connected between the lower frame 15 and the lower part of the pivot frame 16 to support the main battery box 32, and the connection is released and the main battery box 32 can be taken out downward. Since the lower frame 33 that can be switched between the connection release state and the lower release state is provided, the main battery box 32 can be taken out downward in the connection release state of the lower frame 33, and maintenance work of the main battery 30 can be performed. It becomes easy.

  Further, while the main battery 30 is disposed in the first space S1, a sub battery 40 that can supply power to the electric motor 29 instead of the main battery 30 is connected to the rear end portion of the main frame 14. The rear frame 17 that is provided and extends rearward, the seat rail 18 that connects the rear part of the main frame 14 and the middle part of the rear frame 17 and supports the passenger seat 28, and the main frame 14. Since the electric motor 29 is arranged at a position different from the second space S2 and is arranged in the enclosed second space S2, the first and second spaces S1 and S1 that can be largely formed by the electric motor 29 not being arranged. By arranging the main battery 30 and the sub-battery 40 in S2, the larger main battery 30 and the sub-battery 4 It can be arranged, when the main battery 30 has become empty can supply electric power to the electric motor 29 from the sub-battery 40 instead of the main battery 30.

  Further, the main battery 30 is configured by connecting a plurality of main battery cells 31 to each other, and the main battery cells 31 have an upper surface substantially along the lower surface of the main frame 14. In the main battery box 32 disposed in the first space S1 surrounded by the main frame 14, the down frame 15 and the pivot frame 16, the sub battery 40 is aligned and arranged in accordance with the shape of the main battery box 32. Is formed by coupling a plurality of sub-battery cells 41 to each other, and the sub-battery cells 41 are formed in accordance with the second space S2 and arranged in the second space S2. Since the battery box 42 is aligned and arranged in accordance with the shape of the sub battery box 42, the main battery box The box 32 can accommodate a number of cells 31 ... for the main battery can be housed many cells 41 ... a sub battery by the sub-battery box 42.

  Further, a side cover 47 that covers the seat rails 18 from the side is disposed below the occupant seat 28 provided on the seat rails 18 and receives electric power supplied from the main battery 30 or the sub-battery 40. Since the drive circuit means 49 for driving the electric motor 29 is accommodated in the side cover 49, the appearance can be improved by preventing the drive rotation means 49 from being seen outward.

  In addition, a pair of left and right side covers 47 are disposed on the left and right sides of the seat rail 18, the drive circuit means 49 is accommodated in one of the side covers 47, and the other of the side covers 47. Since the charging circuit means 50 for charging the main battery 30 is accommodated, the drive circuit can be obtained while obtaining a good appearance by effectively using the space in the both side covers 47 while making the right and left weight balance good. Means 49 and charging circuit means 50 may be arranged.

  Further, the seat rail 18 in the vehicle body frame FA has a first cooling fan 43 that sucks the air heated by the main battery 30 to the rear side of the first space S1 and discharges it to the rear of the passenger seat 28. The main battery box 32 that is supported and arranged in the first space S1 is formed so as to allow the traveling wind from the front of the motorcycle to be introduced from the front and discharged from the upper rear side. Heat generated in the main battery 30 can be discharged to the rear of the passenger seat 28.

  In addition, the main battery box 32 is formed such that traveling wind from the front of the motorcycle can be introduced from the front part and discharged from the rear upper part, and the main battery 30 is accommodated in the main battery box 32. Therefore, the air in the main battery box 32 can be effectively discharged by the operation of the first cooling fan 43, and the main battery 30 in the main battery box 32 can be effectively cooled.

  A sub-battery 40 that can supply electric power to the electric motor 29 instead of the main battery 30 is disposed in the second space S2 surrounded by the rear frame 17..., The seat rail 18. Since the second cooling fan 44 that sucks the warmed air from the second space S2 and discharges it to the rear of the occupant seat 28 is supported by the rear leg portion 19c of the seat support frame 19 in the vehicle body frame FA. The heat generated in the sub-battery 40 can be discharged to the rear of the passenger seat 28.

  Further, the main battery 30 and the main battery box 32 are arranged in the first space S1 so as not to overlap with both the step frames 37... And the steps 38 provided at the front ends of the step frames 37. Therefore, it is possible to improve the footrest of the occupant while avoiding an increase in the width between the step frames 37. Further, the width of the main battery 30 must be narrowed at the portion where the occupant straddles the occupant seat 28 due to the arrangement of both the step frames 37... And both the steps 38. By increasing the width of the main battery 30 at the portion disposed in front of both steps 38..., The capacity of the main battery box 32 is increased as much as possible while improving the occupant's footrest. The main battery 30 can be enlarged by accommodating the main battery cells 31.

  FIG. 6 shows a second embodiment of the present invention. The parts corresponding to the first embodiment are indicated by the same reference numerals, and the detailed description is omitted.

  A body frame FB of the motorcycle includes a head pipe 13 that supports a front fork 11 and a steering handle 12 that pivotally support a front wheel WF at a lower end portion, and a pipe-like shape that extends rearwardly downward from the head pipe 13. A main frame 14 and a rear frame 52 connected to the lower portion of the main frame 13 so as to be divided into right and left are provided. The rear frame 52 has a pivot frame 53 extending downward from the rear end of the main frame 14. The rear fender functions as a single body and has a seat rail that supports the occupant seat 28 and a rear wheel WR from above.

  A pair of left and right step frames 37 extending forward from the pivot frame 53 are connected to the lower portion of the pivot frame 53, and are seated on the occupant seat 28 at the front ends of the step frames 37. Steps 38 are provided for the passenger to put their feet on.

  The rear wheel WR is pivotally supported on the rear portion of the swing arm 23 that is swingably supported on the lower portion of the pivot frame 53, and an electric motor 29 that exerts power for rotationally driving the rear wheel WR has a rotation axis thereof. Is arranged coaxially with the rear wheel WR.

  A main battery 30 for supplying electric power to the electric motor 29 is configured by a plurality of main battery cells 31 being coupled to each other and accommodated in a main battery box 32. A first space S1 surrounded by the pivot frame 53 and the down frame 15 which is provided continuously to the front end of the head pipe 13 or the main frame 14 (in this embodiment, the front end of the main frame 14) and extends downward. The main battery box 32 is arranged so as not to overlap the step frames 37 and 38 in a plan view, and the upper surface of the main battery box 32 is the lower surface of the main frame 14 extending rearwardly downward. Along the top and lower in steps toward the rear. That.

  Moreover, between the down frame 15 and the lower part of the pivot frame 53, the down frame 15 and the pivot frame 53 are connected to support the main battery box 32, and the connection is released and the main battery box 32 is taken out downward. A lower frame 33 that enables switching between the disengaged state that has been enabled is provided. The lower frame 33 is connected to the down frame 15 at the front part thereof, and the front frame is removed from the down frame 15. The connection state can be switched, and in the connection release state, the lower frame 33 can be rotated so that the front portion thereof is at the lower position, and the main battery box 32 can be taken out downward.

  In addition, in the second space S2 that is surrounded by the main frame 14 and the rear frame 52 that functions as the seat rail and is located below the passenger seat 28, the electric motor 29 is used instead of the main battery 30. A sub-battery 40 that can supply power is disposed. The sub-battery 40 is configured by connecting a plurality of sub-battery cells 41 to each other, and the sub-battery cells 41 are formed in accordance with the second space S2 to be second. The sub-battery box 42 arranged in the space S2 is aligned and arranged in accordance with the shape of the sub-battery box 42.

  The rear frame 52 in the vehicle body frame FB is supported by a first cooling fan 43 that sucks the air heated by the main battery 30 to the rear side of the first space S1 and discharges it to the rear of the passenger seat 28. The main battery box 32 disposed in the first space S1 is formed such that traveling wind from the front of the motorcycle can be introduced from the front part and discharged from the rear upper part.

  In addition, the rear frame 52 in the vehicle body frame FB sucks air heated by the sub-battery 40 disposed in the second space S2 and discharges it to the rear of the passenger seat 28. Is supported.

  By the way, the left and right legs of the occupant sitting on the occupant seat 28 are covered from the front by leg shields 45, respectively. These leg shields 45 cover the main frame 14 from above and the main battery. A synthetic resin center cover 46 is integrally provided to cover the front portion of the box 32 from both sides. On the other hand, the sub-battery box 42 and the second cooling fan 44 are covered from both sides by a pair of left and right side covers 54 disposed on the lower side of the passenger seat 28, and are made of synthetic resin. The side covers 54 are connected to the center cover 46 and the rear frame 52.

  In addition, drive circuit means 49 for driving the electric motor 29 by receiving electric power supplied from the main battery 30 and the sub-battery 40, and charging circuit means 50 for charging the main battery 30 include the rear frame. 52.

  According to the second embodiment, the same effect as that of the first embodiment can be obtained.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

1 is a left side view of a motorcycle according to a first embodiment. FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1. Fig. 3 is a left side view of the motorcycle with a vehicle body cover removed. FIG. 4 is a view taken in the direction of arrow 4 in FIG. 3. It is a figure for demonstrating attachment / detachment operation of a battery. FIG. 6 is a left side view of a motorcycle according to a second embodiment.

DESCRIPTION OF SYMBOLS 11 ... Front fork 12 ... Steering handle 13 ... Head pipe 14 ... Main frame 15 ... Down frame 16, 53 ... Pivot frame 23 ... Swing arm 29 ... Electricity Motor 30 ... Battery main battery 31 ... Battery cell main battery cell 32 ... Battery body main battery box 33 ... Lower frame S1 ... Space first Space WF ... Front wheel WR ... Rear wheel

Claims (2)

Mainframe extending between the front wheel head pipe (13) for supporting a front fork (11) and steering handle for pivotally supporting the (WF) at the lower end (12) steerably, who rear from the head pipe (13) (14) , a seat rail (18, 52) connected to the rear of the main frame (14) so as to support an occupant seat (28) on which the occupant sits, and a head pipe (13) or main A down frame (15) continuously provided at the front end of the frame (14) and extending downward; a pivot frame (16, 53) provided continuously at the rear end of the main frame (14) and extending downward; rotation and swing arm (23) the front end portion is connected vertically swingably to 16,53), a wheel (WR) after being axially supported to the rear end of the swing arm (23) Straddle-type electric vehicle provided with an electric motor (29) for moving,
The electric motor (29) is disposed at the rear end of the swing arm (23) with its rotational axis coaxial with the rear wheel (WR),
The main frame (14) extending obliquely rearward and downward from the head pipe (13), the down frame (15) extending linearly in the vertical direction when viewed from the side of the vehicle, and the pivot frames (16, 53) A main surface having an upper surface along the main frame (14), a front surface along the down frame (15), a rear surface along the pivot frame (16, 53), and a lower surface along the road surface. A battery box (32) is arranged,
In the main battery box (32), a plurality of main battery cells (31) constituting a main battery (30) for supplying electric power to the electric motor (29) are formed in the shape of the main battery box (32). Aligned to
Between the lower ends of the down frame (15) and the pivot frames (16, 53), a lower frame (33) extending in the front-rear direction in parallel with the traveling road surface in a side view of the vehicle connects the lower ends and connects the main battery. The connection state supporting the box (32) and the connection release state in which the connection is released and the main battery box (32) can be taken out downward are provided.
The main battery box (32) is formed such that the lateral width of the front portion of the box is wider than the lateral width of the rear portion of the box. saddle-ride type electric vehicle steps (38), than the rear end of the box rear is disposed on the upper side than and lower at the front side, characterized in Rukoto of. Between the passenger seat (28) and the seat rails (18, 52), a sub battery (40) capable of supplying electric power to the electric motor (29) instead of the main battery (30), 2. The straddle-type electric motor according to claim 1 , wherein the upper part of the sub-battery is positioned at a rear and higher position than an upper end of a front part of the main battery box. vehicle.

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