JP2012101565A - Saddle riding type electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saddle riding type electric vehicle which can simultaneously attain the extension of a traveling distance by securing battery capacity and the suppression of enlargement and weight increase of a vehicle body.SOLUTION: An electric motorcycle 1, which is driven by an electric motor 15, includes a battery unit 21, which accumulates electric power to be supplied to the electric motor 15, and extra batteries 42, which are mounted detachably below a seat S on which an occupant sits and can supply electric power to the electric motor 15 being connected to a connector 43 to which electric power can be input from outside. In this motorcycle, electric power is made suppliable to the electric motor 15 from at least either of the battery unit 21 or the extra batteries 42.

Description

  The present invention relates to a straddle-type electric vehicle.

  Recently, various technologies related to the saddle riding type electric vehicle have been proposed. For example, in Patent Document 1, an electric motor unit is mounted below a pair of left and right main frames extending rearward and downward from a head pipe, and a battery for driving the electric motor in a space between the main frame and the electric motor unit is provided. An electric motorcycle arranged and supported by a main frame is disclosed.

JP 2003-182669 A

  By the way, the cruising distance of a saddle-ride type electric vehicle depends on the capacity of the battery, and the cruising distance can be extended as the capacity of the battery is increased. However, securing the capacity of the battery leads to an increase in the size and weight of the vehicle body. There's a problem.

  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 that can achieve both extension of a cruising distance by securing battery capacity, increase in the size of a vehicle body, and suppression of an increase in weight. .

  As a means for solving the above-mentioned problems, the invention according to claim 1 is a straddle-type electric vehicle driven by an electric motor (15), and stores the electric power to be supplied to the electric motor (15). The battery (21) and an electric power input part (43) that can input electric power from the outside and is electrically connected to the electric motor, and below the seat (S) on which the occupant sits The second battery (42) connected to the power input unit (43) and capable of supplying power to the electric motor (15) can be detachably attached, and the first battery (21) A straddle-type electric vehicle characterized in that electric power can be supplied from at least one of the second battery (42) to the electric motor (15).

  According to a second aspect of the present invention, in the straddle-type electric vehicle according to the first aspect, an article storage portion (38) is provided below the seat (S), and outside the article storage portion (38). The second battery (42) is located at a position sandwiched between the seat (S) and the rear wheel (11) inside the vehicle body cover (34) that covers the article storage portion (38) from the side. Is provided with a battery accommodating portion (41).

  According to a third aspect of the present invention, in the straddle-type electric vehicle according to the second aspect, the article storage portion (38) is positioned below the front half of the seat (S) and opens upward. And a rear extension part (40) which is connected to the storage part main body (39) and extends rearward and is located below the rear half of the seat (S), The battery accommodating part (41) is provided in the extending part (40).

  According to a fourth aspect of the present invention, in the straddle-type electric vehicle according to the first aspect, an article storage portion (62) is provided below the seat (S), and the second battery (64) is It can be attached so as to be accommodated in the article accommodating portion (62).

  According to a fifth aspect of the present invention, in the straddle-type electric vehicle according to the fourth aspect, the second battery (64) is formed in a shape such that an outer wall thereof runs along an inner wall of the article storage unit (62). A rear inner wall (65) of the article storage section (62) extends rearward and upward, and the power input section (66) is provided on the rear inner wall (65). .

  According to a sixth aspect of the present invention, in the saddle riding type electric vehicle according to the fifth aspect, a drain hole (69) is formed in a bottom wall (68) of the article storage portion (62). Features.

  According to the first aspect of the present invention, the first battery is a battery that constantly supplies power to the electric motor, and in addition, the second battery that can supply power to the electric motor. It is possible to extend the cruising distance by making it possible to attach. In addition, by adopting a configuration in which the second battery can be attached under the seat that can ensure a relatively large arrangement space, it is possible to suppress the enlargement of the vehicle body as well as the cruising distance, and the second battery can be attached and detached. Therefore, an increase in weight can be avoided according to the passenger's selection.

  According to invention of Claim 2, 3, since a 2nd battery can be attached by removing a vehicle body cover, the attachment or detachment of a 2nd battery can be performed easily. In addition, the cruising distance can be extended while securing the capacity of the article storage unit.

  According to the fourth aspect of the present invention, it is easy to secure the capacity of the second battery, and it is possible to secure the watertightness of the battery.

  According to invention of Claim 5, while being able to aim at the reliable connection of a 2nd battery and an electric power input part, the water adhesion to this connection site | part can be prevented.

  According to invention of Claim 6, the water which flowed through the inner wall of the back side of an article | item storage part can be drained, and the water adhesion with respect to a battery can be prevented.

1 is a left side view of an electric motorcycle according to a first embodiment of the present invention. It is a left side view of the important section of the electric motorcycle concerning a 1st embodiment. It is sectional drawing which follows the AA line of FIG. 1 is a block diagram showing a system configuration of an electric motorcycle. FIG. 6 is a left side view of an electric motorcycle according to a second embodiment of the present invention. It is a figure explaining attachment of the extra battery (2nd battery) in the electric motorcycle concerning a 2nd embodiment. It is a left view of the principal part of the electric motorcycle which concerns on the 2nd Embodiment of this invention.

  Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In the drawings used below, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow LH indicates the left side of the vehicle.

<First Embodiment>
FIG. 1 shows a scooter type electric motorcycle 1 which is an example of a saddle riding type electric vehicle according to a first embodiment of the present invention. The electric motorcycle 1 includes a steel body frame 2 in which a plurality of frame members are integrally formed by welding or the like. The body frame 2 includes a head pipe 3, a main frame 4 extending rearward and downward from the head pipe 3, and a main frame 4. A pair of left and right rear frames 5 and 5 are provided which are welded to the rear end of the frame 4 and extend rearward and upward, and then extend substantially in the horizontal direction. A pair of plate-like left and right pivot plates 6, 6 are welded to the lower part of the rear frames 5, 5 so as to project rearward, and between the main frame 4 and the rear frames 5, 5 in front of the pivot plates 6, 6. A pair of left and right support frames 7, 7 are welded and installed. Each of the frames 4, 5, and 7 is made of an aluminum alloy pipe material.

  A pair of left and right front forks 8, 8 are rotatably supported on the head pipe 3, and a front wheel 9 is rotatably supported at the lower part of the front forks 8, 8. A steering handle 10 is fixed to the upper portion of the front forks 8, 8, and various operating devices (not shown) such as an accelerator grip and a brake lever are disposed on the steering handle 10. A seat S on which an occupant sits is disposed behind the steering handle 10, and the seat S extends from the center in the longitudinal direction of the vehicle body to the vicinity of the rear portion of the rear wheel 11. The rear wheel 11 is rotatably supported at the rear part of the swing unit 12, and the swing unit 12 is supported by the pivot plates 6 and 6 via the pivot shaft 13, so that the pivot shaft 13 is set as the axis center. It is supported so that it can swing in the vertical direction. A rear cushion 14 serving as a shock absorber is interposed between the rear portion of the swing unit 12 and the left rear frame 5.

  The swing unit 12 is configured by housing an electric motor 15 and a gear mechanism 16 in a unit case 17, and the unit case 17 further includes an ECU (Electrical Control Unit) 18 and a PDU (Power Drive Unit) 19 at the upper part thereof. The control unit 20 is accommodated. The ECU 18 comprehensively executes various controls of the vehicle, and the PDU 19 drives and controls the electric motor 15 in accordance with commands from the ECU 18. The gear mechanism 16 includes a starting clutch, a planetary gear, and the like, and the drive of the electric motor 15 is transmitted to the rear wheel 11 stepwise by the gear mechanism 16. The rear wheel 11 is fixed to a drive shaft (not shown) provided in the electric motor 15 and is driven to rotate.

  The electric motor 15 is supplied with electric power from the battery unit 21 via the PDU 19, and the battery unit 21 includes a plurality of lithium ion batteries in a case made of a resin material. The lithium ion batteries are connected in series to form a high voltage. The battery is configured. The battery unit 21 is integrally supported on the main frame 4 and fastened to and supported by a front bracket 22 and a rear bracket 23 that are arranged in the front-rear direction. The battery unit 21 is electrically connected to the contactor 24 via the first harness 25. The contactor 24 is fixed by a fastening portion (not shown) provided at the lower portion of the left rear frame 5. The contactor 24 is connected to the battery unit 21 via the first harness 25 and is electrically connected to the PDU 19 via the second harness 26 to supply power to the PDU 19.

  The contactor 24 is also connected to a later-described DC-DC converter 27 (FIG. 4). The DC-DC converter 27 is omitted in FIG. The PDU 19 and the electric motor 15 are electrically connected by a third harness 28.

  The vehicle body cover 30 constituting the vehicle exterior of the electric motorcycle 1 is composed of a plurality of resin cover bodies. Specifically, the vehicle body cover 30 includes a handle cover 31 that protrudes outward from the left and right ends of the steering handle 10 to cover the center side of the steering handle 10, and extends downward from the handle cover 31 to the front of the battery unit 21. The leg shield 32 that covers the legs of the occupant seated on the seat S from the front, and extends from the rear surface of the leg shield 32 along the main frame 4, and then extends rearward and up to the lower side of the seat S. A pair of left and right side covers 33 covering the center side portion and a pair of left and right covers provided on the side cover 33 below the seat S so that the front portions of the side covers 33 are overlapped from the side and extending in the front-rear direction and covering the rear frames 5 and 5 Rear side covers 34, 34 are included.

  The seat S is provided above the side cover 33 and the rear side covers 34, 34 so as to straddle them. The side cover 33 is provided with a seat hinge 35 that rotatably supports the seat S, and the front end of the seat S is supported by the seat hinge 35 and is opened from the rear. A rear fender 36 extends from between the rear portions of the rear side covers 34, 34, and a combination lamp 37 is supported on the rear fender 36. The rear fender 36 is supported by rear portions of the rear frames 5 and 5. The rear side covers 34, 34 can be removed from the vehicle body by pulling them out to the outside in the vehicle width direction. FIG. 2 shows the rear part of the vehicle body with the side cover 33 and the left rear side cover 34 removed, and a storage box 38 made of a resin material is disposed inside the side cover 33 and the rear side covers 34, 34. . The storage box 38 is supported by the side cover 33 and the rear side covers 34 and 34.

  The storage box 38 is located below the front half of the sheet S and opens upward, and the second storage part 40 is positioned below the rear half of the sheet S and opens upward. And have. The first storage unit 39 is formed to have a relatively deep bottom so that the helmet can be stored, and the second storage unit 40 is formed to have a shallower bottom than the first storage unit 39 and is connected to the first storage unit 39 in the rear. It extends substantially horizontally. The second storage part 40 is positioned behind the rear wheel 11.

  Referring to FIGS. 2 and 3, a pair of left and right battery housing portions 41 and 41 that house an extra battery that additionally supplies power to the electric motor 15 are provided in the lower portion of the second housing portion 40. As shown in FIG. 3, the battery housing portions 41, 41 extend downward from the lower portion of the second housing portion 40, and then bend outward in the vehicle width direction to cooperate with the lower portion (bottom portion) of the second housing portion 40. Thus, a storage chamber is formed that opens to the outside (left and right) in the vehicle width direction.

  In FIG. 3, CL indicates a center line in the vehicle width direction, and the battery accommodating portions 41 and 41 are spaced apart from the center line CL outward in the vehicle width direction and extend downward. The bottom portions of the battery housing portions 41 and 41 are located above the rear wheel 11, and the battery housing portions 41 and 41 are located between the seat S and the rear wheel 11. Further, a concave space is formed between the left and right battery housing portions 41, 41, and the drilling direction of the space is along the center line CL extending vertically from the rear wheel 11. As shown in FIG. 2, the battery housing chambers 41 and 41 are partitioned into three rooms arranged in the front-rear direction by partition walls 41A and 41B.

  The battery accommodating portions 41 and 41 can accommodate extra batteries 42... Each including a plurality of lithium ion batteries from the outside in the vehicle width direction. A connector 43 capable of inputting the power of the extra battery 42... Is provided in the lower part of the second storage part 40 in front of the battery storage parts 41, 41. As shown in FIG. To the contactor 24. The electric power of the extra batteries 42 can be supplied to the electric motor 15 via the fourth harness 44, the contactor 24, the PDU 19, the second harness 26, and the third harness 28.

  After the extra batteries 42 are accommodated in the battery accommodating portions 41, 41, as shown in FIG. 3, the rear batteries 34, 34 cover the extra batteries 42 ... from the outside in the vehicle width direction. Yes. Here, ribs 45, 45 for closing the opening of the battery accommodating portions 41, 41 are integrally formed on the inner surfaces of the rear side covers 34, 34 in the vehicle width direction, and the extra batteries 42,. In this state, it contacts the extra batteries 42 from the outside in the vehicle width direction and restricts these movements. Incidentally, even if the extra batteries 42 are not accommodated in the battery accommodating portions 41, 41, the openings of the battery accommodating portions 41, 41 are closed by the ribs 45, 45, so this space is a chamber for accommodating other articles. Can also be used. In this embodiment, the ribs 45, 45 are provided on the rear side covers 34, 34 in order to prevent the extra batteries 42 ... from falling off, but instead, they are locked around the openings of the battery accommodating portions 41, 41. A mechanism or the like may be provided.

  Next, FIG. 4 shows a system configuration of the electric motorcycle 1. As shown in FIG. 4, in the electric motorcycle 1, the electric power from the battery unit 21 is supplied to the PDU 19 that is a motor driver via a contactor 24 that is linked to a main switch (not shown), and is converted from direct current to three-phase alternating current by the PDU 19. After that, the electric motor 15 which is a three-phase AC motor is supplied. Further, the output voltage from the battery unit 21 is stepped down via the DC-DC converter 27, for example, a 12V sub-battery 46, general electrical components such as instruments ("etc" in the figure), ECU 18, etc. Supplied to control system parts.

  The battery unit 21 is charged by a charger (CHG) 47 connected to, for example, an AC 100V power source. The BMU (Battery Management Unit) 48 monitors the charge / discharge status and temperature of the battery unit 21, and the information is shared with the ECU 18. The ECU 18 receives output request information from the accelerator sensor (ACL) 49, and the ECU 18 drives and controls the electric motor 15 via the PDU 19 based on the output request information. The charger 47 is provided at an appropriate position on the vehicle body, but it may be not mounted. Further, depending on the type of the battery unit 18, the sub battery 46 may be omitted. Further, the BMU 48 is disposed in the vicinity of the battery unit 21.

  Here, in the electric motorcycle 1 according to the present embodiment, the electric power from the extra battery 42... Is supplied to the PDU 19 which is a motor driver via the contactor 24 and is converted from direct current to three-phase alternating current by the PDU 19. Later, it can be supplied to the electric motor 15 which is a three-phase AC motor. In addition, the output voltage from the extra battery 42... Is stepped down via the DC-DC converter 27, so that the sub-battery 46, general electric parts such as instruments (“etc” in the figure), the ECU 18, etc. It can also be supplied to the control system parts. That is, the PDU 19 can supply power to the electric motor 15 from at least one of the battery unit 21 and the extra battery 42. In the electric motorcycle 1, the steering handle 10 is provided with an accelerator grip (not shown), and the accelerator opening of the accelerator grip is detected by the accelerator sensor 49 and output to the ECU 18. The ECU 18 controls the PDU 19 in accordance with the accelerator opening, and the rear wheel 11 is driven by the PDU 19 so that the electric motorcycle 1 travels.

  As described above, the electric motorcycle 1 according to the first embodiment of the present invention is capable of inputting electric power from the battery unit 21 that stores electric power to be supplied to the electric motor 15, and electric power from the outside. An extra battery 42, which has a connector 43 electrically connected to the motor 15 and can be connected to the connector 43 to supply electric power to the electric motor 15 below the seat S on which an occupant sits. The electric motor 15 can be supplied with power from at least one of the battery unit 21 and the extra battery 42.

  For this reason, in addition to the battery unit 21 which supplies electric power to the electric motor 15 constantly, the extra batteries 42 can be attached, so that the cruising distance can be extended. Further, since the extra battery 42... Can be mounted under the seat S that can secure a relatively large arrangement space, it is possible to suppress the enlargement of the vehicle body along with the extension of the cruising distance, and the extra battery 42. Since it is detachable, an increase in weight can be avoided according to the occupant's selection.

  Further, in the electric motorcycle 1 according to the present embodiment, a storage box 38 is provided below the seat S, and is detachable rear side covers 34 and 34 that are outside the storage box 38 and cover the storage box 38 from the side. Are provided between the seat S and the rear wheel 11, and battery accommodating portions 41, 41 to which extra batteries 42 can be attached are provided. Thereby, since the extra batteries 42 can be attached by removing the rear side covers 34, 34, the extra batteries 42 can be easily attached and detached. Further, the cruising distance can be extended while securing the capacity of the storage box 38.

  Further, in the electric motorcycle 1 according to the present embodiment, the storage box 38 is positioned below the front half of the seat S and opened upward, and below the rear half of the seat S. A second storage portion 40 that opens upward, and the first storage portion 39 is formed with a shallow bottom portion, and is open to the lower side of the second storage portion 40 outward in the vehicle width direction. Battery accommodating portions 41, 41 to which the extra batteries 42 can be attached are provided. Accordingly, since the extra batteries 42 can be attached from the outside in the vehicle width direction, the extra batteries 42 can be easily attached and detached. Moreover, the battery accommodating parts 41 and 41 can be used as a storage chamber for other articles according to the occupant's selection, and it is easy to use.

  In the present embodiment, the second storage portion 40 opens upward to form a storage space. However, a portion corresponding to the second storage portion 40 may be a plate-like member integrated with the first storage portion 39. Moreover, although the battery accommodating parts 41 and 41 shall be formed integrally with the storage box 38, you may arrange | position the storage box 38 under the sheet | seat S as another thing.

<Second Embodiment>
Next, an electric motorcycle 60 according to a second embodiment of the present invention will be described with reference to FIGS. Parts common to the electric motorcycle 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 5, in the electric motorcycle 60, a storage box 61 is provided below the seat S as in the first embodiment, and the storage box 61 is positioned below the front half of the seat S and upward. The first storage unit 62 is opened, and the second storage unit 63 is positioned below the rear half of the sheet S and opens upward. The first storage part 62 is formed with a relatively deep bottom so that the helmet can be stored, and the second storage part 63 is formed with a shallower bottom than the first storage part 62 and is connected to the first storage part 62 in the rear. It extends substantially horizontally. The second storage part 63 is positioned behind the rear wheel 11.

  In the present embodiment, as shown in FIG. 6, the first storage unit 62 of the storage box 61 serves as a pair of left and right battery storage units that store an extra battery 64 that additionally supplies power to the electric motor 15. The extra battery 64 is attached so as to be housed in the first housing portion 62. The extra battery 64 is formed in the same shape as the inner volume of the first storage portion 62, that is, in a shape in which the outer wall thereof runs along the inner wall of the first storage portion 62. Hereinafter, the rear wall 65) extends rearward and upward as shown in FIG. 7, and the rear wall 65 is provided with a connector 66 capable of inputting the power of the extra battery 64.

  The connector 66 is provided so as to be flush with the rear wall 65, that is, so as not to protrude from the inclined surface of the rear wall. The fifth harness 67 is pulled out outside the first storage portion 62 and connected to the contactor 24 as shown in FIG. Has been. A contact point with the connector 66 is provided on the rear wall of the extra battery 64. Further, a drain hole 69 is formed through the bottom wall 68 of the first storage portion 62.

  The system configuration of the electric motorcycle 60 is the same as that shown in FIG. 4. In this embodiment, the electric motor 15 can be supplied with power from at least one of the battery unit 21 and the extra battery 64. ing. Further, as shown in FIG. 7, ring-shaped sheet catchers (fasteners) 70, 70 are provided on the left side of the sheet S, and one end of the sheet catcher 70, 70 is fixed to the right side of the sheet S. Then, the other ends of the belts 71 and 71 passed below the rear frames 5 and 5 are locked and fastened. In the present embodiment, by providing such sheet catchers 70, 70, it is possible to fix the extra battery 64 accommodated by the bottom plate of the sheet S. The seat catchers 70 and 70 are provided at substantially the center and the rear part of the seat S, and fasten the seat S in the horizontal region of the rear frames 5 and 5. In FIG. 7, a part of the storage box 61 is shown in cross section.

  Also in the electric motorcycle 60 according to the second embodiment, since the extra battery 64 can be attached in addition to the battery unit 21 that constantly supplies power to the electric motor 15, the cruising distance is extended. In addition, since the extra battery 64 can be attached under the seat S that can ensure a relatively large arrangement space, it is possible to suppress the enlargement of the vehicle body as well as the extension of the cruising distance. Further, since the extra battery 64 is detachable, an increase in weight can be avoided according to the occupant's selection.

  In addition, since the storage box 61 is provided below the seat S and the extra battery 64 can be mounted so as to be stored in the first storage portion 62 of the storage box 61, it is easy to secure the capacity of the extra battery 64, Moreover, the watertightness with respect to the battery can be ensured.

  Further, the extra battery 64 is formed to have an outer wall extending along the inner wall of the first storage part 62, the rear wall 65 of the first storage part 62 extends rearward and upward, and a connector 66 is provided on the rear wall 65. Therefore, the extra battery 64 and the connector 66 can be securely connected to each other, and water can be prevented from adhering to the connection portion. Further, a drain hole 69 is formed in the bottom wall 68 of the first storage portion 62. Therefore, water that has flowed through the rear wall 65 of the first storage portion 62 can be removed to prevent water from adhering to the extra battery 64.

  Although the first and second embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above embodiment, the battery unit is configured to include a plurality of lithium ion batteries, but instead of this, a nickel hydrogen battery or a lead battery may be used.

1,60 Electric motorcycle (saddle-type electric vehicle)
15 Electric motor 21 Battery unit (first battery)
38, 61 Storage box (article storage section)
39 First storage part (main part of storage part)
40 Second storage part (rear extension part)
41 Battery housing part 42, 64 Extra battery (second battery)
43,66 connector (power input part)
62 1st accommodating part (battery accommodating part)
65 Rear wall (inner wall)
68 Bottom wall 69 Drain hole

Claims (6)

A straddle-type electric vehicle driven by an electric motor (15),
A first battery (21) for storing electric power to be supplied to the electric motor (15);
A power input unit (43) capable of inputting electric power from the outside and electrically connected to the electric motor;
Below the seat (S) on which the occupant sits, a second battery (42) that can be connected to the power input portion (43) and can supply power to the electric motor (15) can be detachably attached. both,
A straddle-type electric vehicle characterized in that electric power can be supplied from at least one of the first battery (21) and the second battery (42) to the electric motor (15). An article storage section (38) is provided below the sheet (S),
A position outside the article storage section (38) and sandwiched between the seat (S) and the rear wheel (11) inside the vehicle body cover (34) covering the article storage section (38) from the side. The straddle-type electric vehicle according to claim 1, further comprising a battery housing portion (41) to which the second battery (42) can be attached. The article storage portion (38) is positioned below the front half of the sheet (S) and opens upward, and is connected to the storage portion main body (39) and extends rearward. A rear extension (40) located below the rear half of the seat (S),
The straddle-type electric vehicle according to claim 2, wherein the battery accommodating portion (41) is provided in the rearward extending portion (40). An article storage section (62) is provided below the sheet (S),
The straddle-type electric vehicle according to claim 1, wherein the second battery (64) can be mounted so as to be housed in the article housing portion (62). The second battery (64) is formed in a shape that has an outer wall along the inner wall of the article storage unit (62),
The rear inner wall (65) of the article storage section (62) extends rearward and upward, and the power input section (66) is provided on the rear inner wall (65). 4. A straddle-type electric vehicle according to 4.   The straddle-type electric vehicle according to claim 5, wherein a drain hole (69) is formed in a bottom wall (68) of the article storage portion (62).

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