JP2006096105A - Battery holding device for electric vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively utilize space by improving layout of a battery for a motor of a motorized two-wheeled vehicle and improve cooling effect of the battery. <P>SOLUTION: A battery assembly body (battery) 26 is disposed by dividing an upper part 27 and a lower part 28. The upper part 27 is disposed on the side part of a head pipe 3 and the lower part 28 is disposed on the side part of a down frame 4. Especially, the lower part 28 is disposed on the outer side than a front fork 7 to approach the vehicle body front part. An inlet port 43 of traveling wind is formed on a cowl in front of the battery assembly body 26. An exhaust port 44 exhausting the traveling wind is provided on an inner cover 42. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric vehicle battery holding device, and more particularly to an electric vehicle battery holding device suitable for securing a large battery capacity.

  There are known an electric vehicle driven by the power of an electric motor and a hybrid vehicle driven by a power obtained by hybridizing an electric motor and an engine. In such an electric vehicle, a large-capacity battery must be mounted, and securing the installation space has been a problem. In particular, in a motorcycle with little extra storage space, it can be considered that the installation position of the battery is difficult.

For example, Japanese Patent No. 3069808 discloses an electric motorcycle in which a battery is disposed along a down frame extending obliquely downward and rearward from a head pipe that supports a steering shaft. In this electric motorcycle, a storage box such as a helmet is provided between the leg shield and the occupant seat, and the battery is stored in a space surrounded by the leg shield and the cover of the storage box.
Japanese Patent No. 3069808

  In the battery arrangement described in Patent Document 1, if the battery capacity is further increased, the space between the leg shield and the cover of the storage box is narrowed, and it becomes difficult to provide a margin for the passenger's legs. . Therefore, a battery holding device that can accommodate a large-capacity battery while securing a sufficient space around the suspension so as not to impair the ride comfort of the occupant is desired.

  An object of the present invention is to provide a battery holding device that can accommodate a large-capacity battery suitable for an electric vehicle.

  In order to achieve the above object, the present invention is formed between a front cover of a vehicle body arranged at the front portion of the vehicle body and a rear cover arranged on the rear side of the vehicle body facing the front cover so as to be able to accommodate a battery. A battery case having a battery housing portion, the battery housing portion is located on the outer side in the vehicle width direction than the front fork, and is provided on each of the left and right sides of the vehicle body, and the front cover includes A first feature is that an air intake port is provided at a position facing the battery housing portion, and an air discharge port is provided in the rear cover.

  In addition, the present invention has a second feature in that the battery case is composed of an upper housing portion disposed along the head pipe and a lower housing portion disposed along the down frame.

  In addition, the present invention has a third feature in that the upper housing part of the battery case is disposed closer to the inside of the vehicle body than the lower housing part.

  Furthermore, the present invention has a fourth feature in that a storage space is formed between the battery housing portion and the down frame.

  According to the first feature, while ensuring the space around the passenger's legs and increasing the capacity of the battery, the traveling wind is taken in from the air intake port while the vehicle is traveling, and the battery housing portion is cooled by the traveling wind. Is done.

  Since the battery accommodating part arrange | positioned outside a front fork receives driving | running | working wind better, the cooling effect of a battery is high. Further, since the front fork and the battery housing portion do not interfere with each other in the front-rear direction of the vehicle body, the battery housing portion can be disposed closer to the front than the front fork. Therefore, the space around the passenger's legs can be made sufficiently large.

  According to the second feature, the upper housing portion and the lower housing portion of the battery case are arranged along the head pipe and the down frame, respectively, so that the overhang from the vehicle body frame can be reduced in a side view of the vehicle. it can. Therefore, for example, a large-capacity battery can be mounted on a vehicle such as a two-wheeled vehicle in which the space is extremely limited.

  According to the third feature, by arranging the upper housing part of the battery case arranged in the vicinity of the head pipe closer to the inside of the vehicle body, the projecting part in the vehicle width direction around the handle can be reduced. In particular, in a small scooter type vehicle, space can be used efficiently.

  According to the 4th characteristic, since the battery accommodating part has been arrange | positioned outside the front fork, it can be utilized as a container by widening between a battery accommodating part and a down frame.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a scooter including a battery holding device according to an embodiment of the present invention. This scooter is a hybrid scooter driven by hybrid power of an internal combustion engine and an electric motor.

  The vehicle body frame of the scooter 1 shown in FIG. 1 extends from the head pipe 3 to a steering handle (hereinafter simply referred to as “handle”) 2 so as to be rotatable, and from the head pipe 3 obliquely downward to the rear of the vehicle body. The cross frame 4 is connected to a down frame 4, an intermediate frame 5 that branches from the lower end of the down frame 4 to the left and right of the vehicle body and extends substantially horizontally rearward, and a cross member 5 a that is passed to the left and right portions of the intermediate frame 5. A pair of left and right rear frames 6 extending from the member 5a obliquely upward to the rear of the vehicle body are provided.

  A front fork 7 whose upper end is connected by a bottom bridge 37 is coupled to the lower end of the shaft 2 a of the handle 2 that is pivotally supported by the head pipe 3. A front wheel 8 is pivotally supported at the lower end of the front fork 7.

  The power unit 12 including the engine 9, the electric motor 10, and the belt type continuously variable transmission 11 is supported by the link mechanism 13 so as to be swingable up and down with respect to the rear frame 6. A rear wheel 15 is connected to the power unit 12 via a speed reducer 14. Between the rear part of the power unit 12 and the rear part of the rear frame 6, a rear cushion 16 having upper and lower ends coupled to the rear part of the power unit 12 and the rear part of the rear frame 6 is provided.

  A drive pulley 18 is coupled to the crankshaft 17 of the engine 9, and a V-belt 20 is hung between the drive pulley 18 and a driven pulley 19 on the rear wheel side. A driven shaft 21 that supports the driven pulley 19 is connected to the rear wheel 15 via a gear device in the speed reducer 14.

  The crankshaft 17 is provided with a start clutch adjacent to the drive pulley 18, and an ACG starter motor is provided on the side opposite to the start clutch (right side of the vehicle body). The starting clutch and the ACG starter motor are not shown.

  The driven pulley 19 and the driven shaft 21 are coupled via a one-way clutch (not shown) so that only the rotation of the driven pulley 19 in one direction (the rotational direction for moving the vehicle forward) can be transmitted to the driven shaft 21. The electric motor 10 is disposed close to the driven shaft 21, and the inner rotor of the electric motor 10 is formed integrally with the driven shaft 21.

  In the power unit 12, the power of the engine 9 is transmitted from the crankshaft 17 to the rear wheel 15 via the starting clutch, the continuously variable transmission 11, the one-way clutch, the driven shaft 21, and the reduction gear 14. On the other hand, when the engine 9 is at rest, the electric motor 10 can be energized to drive the rear wheel 15 alone, or the electric motor 10 can be energized during operation of the engine 9 to assist the output of the engine 9. it can.

  An occupant seat 22 is provided on the upper portion of the rear frame 6. A helmet or the like can be stored below the occupant seat 22. The rear frame 6 is provided with an inverter device 23 serving as a driver circuit for the electric motor 10, an engine 9 and an ECU 24 that controls the ACG starter electric motor.

  The intermediate frame 5 is provided with a battery 25 for supplying a voltage of 12 volts as a control power source for the engine 9 and lighting. Battery assemblies 26 serving as driving power sources for the electric motor 10 are arranged on the left and right sides of the down frame 4 that is joined to the head pipe 3 and located at the center in the width direction of the vehicle body. The battery assembly 26 includes an upper battery group 27 disposed substantially along the head pipe 3 in a side view and a lower battery group 28 disposed along the down frame 4. That is, the battery assembly 26 is accommodated along the front cowl (front cover) 50 including the leg shield 29 as a whole.

  The arrangement of the battery assembly 26 will be described in further detail. 2 is a perspective view from the left rear showing the main part of the front part of the vehicle body of the scooter 1, FIG. 3 is a side view, FIG. 4 is a front view from the front of the vehicle body, FIG. 5 is a rear view, and FIG. It is sectional drawing in an AA position.

  2 to 6, a bowl-shaped battery case 30 is disposed so as to straddle the down frame 4 joined to the head pipe 3. The battery case 30 includes a flange portion 31 that straddles the down frame 4 and a battery housing portion 32 that extends from the base of the flange portion 31 to the left and right in the vehicle width direction. The battery housing portion 32 is formed as a fitting recess suitable for housing the upper battery group 27 and the lower battery group 28 in which a plurality of cylindrical batteries 45 are aligned. The battery 45 is, for example, a nickel metal hydride battery (Ni-MH battery).

  The battery case 30 bends the boundary between the upper housing portion 32a and the lower housing portion 32b so that the upper battery group 27 and the lower battery group 28 can be disposed along the head pipe 3 and the down frame 4, respectively. In other words, the upper housing portion 32a is disposed substantially vertically, and the lower housing portion 32b is disposed extending obliquely downward and rearward from the lower end of the upper housing portion 32a.

  A conductor unit 34 that houses a relay unit and a fuse (described later) for connecting the battery assembly 26 and the electric motor 10 is attached to the top 33 of the flange portion 31.

  As shown in FIGS. 4 and 6, the bottom of the battery housing portion 32 of the battery case 30 is semicircular so as to fit the outer shape of the cylindrical battery 45 and the band-shaped holder 47 that holds both ends of the cylindrical battery 45. The waveform is formed to have a continuous portion.

  Battery covers 35 and 36 are placed on the battery case 30 so that the upper battery group 27 and the lower battery group 28 do not escape from the battery housing portion 32. The shape of the battery covers 35 and 36 is also formed to have a semicircular waveform continuous portion so as to match the outer shape of the battery 45 and the band-shaped holder 47, similarly to the bottom of the battery housing portion 32. The battery covers 35 and 36 may be separate from each other or may be integrally formed.

  The battery covers 35 and 36 are screwed to the battery case 30, for example. An example of screwing is shown in FIG. Mounting bosses 81 and 82 are provided on the battery case 30 and the battery cover 36, respectively. The battery cover 36 is fixed to the battery case 30 by passing the tightening screw 83 through the hole provided in the mounting boss 82 and screwing it into the screw hole of the mounting boss 81.

  As can be understood from FIGS. 4 and 5, the lower housing portion 32b of the battery housing portion 32 of the battery case 30 is wider in the vehicle width direction than the upper housing portion 32a and supports the shaft 2a of the handle 2. Located farther away from 3. The distance between the lower housing portions 32 b on the left and right sides of the vehicle body is set larger than the width of the front fork 7.

  With such an arrangement, even if the battery case 30 is moved closer to the front of the vehicle body, the bent portion of the battery case 30 does not interfere with the bottom bridge 37. Therefore, the battery case 30 can be disposed along the leg shield 29 toward the front of the vehicle body.

  On both sides of the down frame 4, two concave portions 38, 38 of the battery case 30 are provided symmetrically (see FIG. 4). The recesses 38 correspond to the position of the top of the front fork 7, that is, the bottom bridge 37, so that the bottom bridge 37 does not come into contact with the battery case 30 when the battery case 30 is disposed near the front of the vehicle body. The interval between each other is set.

  By disposing the battery case 30 that houses the battery assembly 26 close to the front of the vehicle body, the distance between the inner cover (rear cover) 42 of the front cowl 50 that covers the battery case 30 from the rear side of the vehicle body and the occupant seat 22 is increased. In addition, since the space 39 around the passenger's legs can be widened, riding comfort is improved (see FIG. 3).

  FIG. 7 is a cross-sectional view taken along the line BB in FIG. In FIG. 7, the conductor unit 34 is attached to the top 33 of the flange portion 31 of the battery case 30 with set screws 40 and 40. A center cover 41 is put on the conductor unit 34. A leg shield 29 is disposed in front of the battery case 30. The leg shield 29 forms a part of a front cowl (front cover) 50 that covers the front of the vehicle body. The leg shield 29 includes air intake ports 43 and 43 positioned immediately before the battery housing portion 32.

  On the other hand, the inner cover (rear cover) 42 that covers the battery assembly 26 and the battery case 30 from the rear of the vehicle body is provided with air discharge ports 44 and 44 at both ends in the vehicle width direction. And the fin 46 is provided in the front part of the battery accommodating part 32 of the battery case 30, and the outer surface area of the battery accommodating part 32 is enlarged. As a result, the traveling wind W received while the scooter 1 travels flows from the air intake port 43, passes while hitting the fins 46, and is discharged to the outside from the air discharge port 44. As described above, the shape of the battery case 30 is determined along the battery assembly 26. That is, the battery case 30 and the battery assembly 26 are in close contact with each other. Therefore, the heat generated by the battery 45 is released through the battery case 30 by the traveling wind W passing through the leg shield 29 and the inner cover 39, and the cooling effect of the battery 45 is obtained.

  FIG. 8 is a rear view of the front portion of the vehicle body with the battery covers 35 and 36 and the center cover 41 removed. The upper battery group 27 and the lower battery group 28 are composed of a plurality of batteries 45 bound by a band-shaped holder 47.

  The upper battery group 27 and the lower battery group 28 provided on the left and right of the vehicle body, the fuse 49 and the relay unit 51 are connected in series. A plus-side cord 52 drawn from the relay unit 51 and a minus-side cord 53 drawn from the left lower battery group 28 are assembled in a connecting coupler 54.

  Thus, according to the present embodiment, since the battery is arranged in a wide area extending from the periphery of the shaft 2a of the handle 2 to the periphery of the down frame 4, it is possible to supply sufficient electric power to the drive motor of the electric motorcycle. it can. In addition, since the battery is arranged to follow the bent shape of the head pipe 3 and the down frame 4 and close to the left and right ends of the leg shield 29 to avoid interference with the front fork 7, the battery is sufficiently placed in front of the vehicle body. Can be placed close to As a result, there was a margin in the space around the passenger's legs.

  FIG. 9 is a diagram showing an example in which a space that can be used as a container is formed, and the same reference numerals as those in FIG. 7 denote the same or equivalent parts. In FIG. 7, the inner cover 42 is formed in a shape that substantially follows the saddle shape of the battery case 30. However, in this modified example, the shape of the inner cover 42 is modified to form a space S between the inner cover 42 and the battery case 30 so that the space S can be used as a container. Since the battery housing portion 32 can be disposed near the front of the vehicle body, the degree of freedom in layout is also increased.

  In the above embodiment, the present invention is applied to a two-wheel scooter. However, the present invention is not limited to this, and can be applied to a three-wheeled vehicle or a four-wheeled vehicle as long as the vehicle has a head pipe and a frame member (a member corresponding to a down frame) that extends obliquely downward from the head pipe. is there. Further, the present invention is not limited to a hybrid vehicle and can be similarly applied to an electric vehicle in which wheels are driven only by an electric motor.

It is a side view of the scooter provided with the battery holding device concerning one embodiment of the present invention. It is a perspective view from the left rear which shows the principal part of the vehicle body front part of a scooter. It is a side view of the vehicle body front part of a scooter. It is a front view from the vehicle body front of a scooter. It is a rear view of a scooter. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. FIG. 6 is a rear view of the front portion of the vehicle body with the battery cover and the center cover removed. It is sectional drawing of the vehicle body front part which concerns on a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Scooter, 2 ... Head pipe, 4 ... Down frame, 5 ... Intermediate frame, 7 ... Front fork, 8 ... Front wheel, 9 ... Engine, 10 ... Electric motor, 26 ... Battery assembly, 27 ... Upper battery group, 28 ... Lower battery group, 29 ... Leg shield, 30 ... Battery case, 31 ... 鞍 part, 32 ... Battery housing, 35, 36 ... Battery cover, 37 ... Bottom bridge, 39 ... Space around the foot, 42 ... Inner cover (rear) Cover), 45 ... battery, 46 ... fin, 50 ... front cowl (front cover)

Claims (4)

A front fork comprising a pair of rod members disposed on the left and right of the front wheel of the vehicle to support the front wheel at the lower end and connected to each other at the upper end;
A head pipe that supports the front fork in a steerable manner;
An electric vehicle battery holding device for holding a battery for supplying electric power to a drive motor of an electric vehicle having a vehicle body frame including a down frame extending obliquely downward from the vehicle body rearward from the head pipe;
A battery case having a battery housing portion formed between the front cover of the vehicle body disposed at the front portion of the vehicle body and a rear cover disposed on the rear side of the vehicle body facing the front cover so as to be capable of housing the battery; And
The battery accommodating portion is located on the outer side in the vehicle width direction from the front fork, and is provided on each of the left and right sides of the vehicle body,
The battery retention device for an electric vehicle, wherein the front cover is provided with an air intake port at a position facing the battery housing recess, and the rear cover is provided with an air discharge port.   The battery holding device for an electric vehicle according to claim 1, wherein the battery case includes an upper housing portion disposed along the head pipe and a lower housing portion disposed along the down frame. .   3. The battery holding device for an electric vehicle according to claim 1, wherein the upper housing portion of the battery case is disposed closer to the inside of the vehicle body than the lower housing portion.   The battery holding device for an electric vehicle according to claim 1, wherein a storage space is formed between the battery housing portion and the down frame.

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