TW201401620A - Battery unit - Google Patents

Abstract

To provide a battery unit improving workability when a connection cable is connected to an electrode terminal of a battery module, and reducing a load on assembly workers. A plurality of battery modules 40A to 40D are housed in a battery box 14 with electrode terminals Tp, Tn facing toward the same direction. A guide plate 42 is overlapped with the faces of the plurality of battery modules 40A to 40D on which the electrode terminals Tp, Tn exist. The guide plate 42 has openings 48 at which the electrode terminals Tp, Tn are exposed. On a reverse side of a side of the guide plate 42 facing the battery modules 40A to 40D, guide claws 49a, 49b, 49c, 49e for holding the connection cables 41a to 41f and band-shaped wiring indication marks 50a to 50f are provided.

Description

Battery unit

The present invention relates to a battery unit in which a plurality of battery modules are housed in a battery case.

In recent years, various electric straddle type vehicles such as an electric speed keda using an electric motor as a driving source have been developed (for example, refer to Patent Document 1).

In an electric straddle type vehicle driven by an electric motor, it is necessary to mount a high-voltage, large-capacity battery in order to secure the drive output. Most of the batteries used in this case are formed by accommodating a plurality of battery modules in a battery case to form a battery unit. Inside the battery case, the battery modules are electrically connected to each other (indicating that currents can be electrically connected to each other).

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2010-269658

As described above, in the battery unit, inside the battery case, the respective electrode terminals of the battery module may be internally wired by the connection cable.

In this case, once the number of battery modules housed in the battery case increases, the number of connection cables increases, and the wiring itself becomes a complicated wiring. Therefore, when assembling a battery unit, a skilled operator is required.

Especially in the case of an electric straddle type vehicle, in the case where it is desired to closely concentrate the battery cells in a limited installation space, the plurality of battery modules in the battery case are mostly in an irregular direction. The configuration makes it easier to make wiring between battery modules more complicated. For this reason, the burden on the operator becomes greater.

In view of the above, the present invention provides a battery unit capable of improving the workability of "connecting a connecting cable to an electrode terminal of a battery module" and reducing the burden on the assembler.

In order to solve the above problems, the battery unit of the present invention adopts the following structure.

The invention of claim 1 is characterized by comprising: a plurality of battery modules (40A to 40D) having electrode terminals (Tp, Tn); and internally accommodating the plurality of battery modules (40A to 40D) as electrodes a battery case (14) whose terminals (Tp, Tn) face the same side; and a plurality of connection cables which are connected to the electrode terminals (Tp, Tn) of the battery modules (40A to 40D) inside the battery case (14) (41a~41f); and Ann a guide plate (42) spanning an end surface of the plurality of battery modules (40A to 40D) having the electrode terminals (Tp, Tn); and the guide plate (42) is provided for: Connecting the connection cables (41a to 41f) to the terminal connection portions (48) of the electrode terminals (Tp, Tn) from the side opposite to the side of the plurality of battery modules (40A to 40D); And wiring guiding means (49a, 49b, 49c, 49e, 50a to 50f) for guiding the wirings of the aforementioned connecting cables (41a to 41f) on the opposite side surfaces.

The invention of claim 2 is the battery unit of claim 1, wherein the wiring guiding means includes: guiding claws (49a, 49b, 49c, 49e) for holding the connecting cables (41a to 41f) in a specific direction.

The invention of claim 3 is the battery unit of claim 1 or 2, wherein the wiring guiding means includes wiring indicating portions (50a to 50f) for allowing the operator to visually recognize the wiring direction of the connecting cables (41a to 41f) .

The invention of claim 4 is the battery unit of claim 3, wherein the wiring indication portion is a guide groove into which the connection cables (41a to 41f) are fitted.

The invention of claim 5 is the battery unit according to any one of claims 1 to 4, wherein the terminal connection portion is formed by exposing the electrode terminal (Tp, Tn) to the guide plate (42) The opening on the side of the side (48).

The invention of claim 6 is any one of claims 1 to 5. The battery unit of the item, wherein the guide plate (42) is formed of an insulating soft resin.

The invention of claim 7 is the battery unit of any one of claims 1 to 6, wherein the battery limiting member is provided to "limit the plurality of battery modules (40A to 40D) in the battery case (14)" (43) The battery regulating member (43) restricts the plurality of battery modules (40A to 40D) to the battery case (14) through the guide plate (42).

According to the present invention, since the guide plate "crossing and mounted on the side of the plurality of battery modules having the electrode terminals" is provided, and the guide plate is provided with: for connecting the connection cable to the battery a terminal connecting portion of the electrode terminal of the module and a wiring guiding means for guiding the wiring of the connecting cable, so that the wiring guiding means can be used to guide the connecting cable and perform the connection work of the connecting cable to the electrode terminal, and surely Connect the connecting cable to the corresponding electrode terminal.

Further, in the case where the guide sheets are formed of an insulating soft resin, even if there are some errors in the height of the upper surface of the plurality of battery modules housed in the battery case, the battery holder is pressed against the plurality of batteries. The end face of the battery module is fixed to the battery case to suppress the shaking of the battery module.

14‧‧‧ battery case

40, 40B, 40C, 40D‧‧‧ battery modules

41a~41f‧‧‧Connecting cable

42‧‧‧Guideboard

43‧‧‧Installation plate (battery limiting member)

48‧‧‧ openings (terminal connection)

49a, 49b, 49c, 49e‧‧‧ Guide claws (wiring guidance means)

50a~50f‧‧‧Wiring indicator (wiring indication part, wiring guidance means)

BU‧‧‧ battery unit

Tp, Tn‧‧‧ electrode terminals

Fig. 1 is a side view of an electric motor vehicle according to an embodiment of the present invention.

Fig. 2 is a side view showing a state in which a member such as a casing and parts are removed, in an electric motor vehicle according to an embodiment of the present invention.

Fig. 3 is a perspective view showing the state of a motor vehicle according to an embodiment of the present invention, in which a member such as a casing and parts are removed.

Fig. 4 is a plan view showing a frame portion of an electric motor vehicle according to an embodiment of the present invention.

Fig. 5 is a side view of a frame portion of an electric motor vehicle according to an embodiment of the present invention.

Fig. 6 is a perspective view of the electric motor vehicle according to an embodiment of the present invention seen from the lower side of the front end in a state in which a member such as a casing and a part are removed.

Fig. 7 is a cross-sectional view taken along line A-A of Fig. 2 of the electric motor vehicle according to one embodiment of the present invention.

Fig. 8 is an exploded perspective view showing a battery unit of one embodiment of the present invention.

Fig. 9 is a perspective view showing that the battery unit of the embodiment of the present invention has been removed from the cover.

Fig. 10 is a plan view showing that the battery unit of the embodiment of the present invention has been removed from the cover.

Figure 11 is a plan view showing a guide plate of a battery unit of one embodiment of the present invention.

Fig. 12 is a perspective view showing a guide plate of a battery unit of one embodiment of the present invention.

Figure 13 is a cross-sectional view taken along line B-B of Figure 2 of the electric motor vehicle according to one embodiment of the present invention.

Fig. 14 is a cross-sectional view taken along line B-B of Fig. 2 of the electric motor vehicle according to one embodiment of the present invention.

Fig. 15 is a perspective view showing a battery case according to a modification of the embodiment of the present invention.

Fig. 16 is a cross-sectional view showing a battery case according to a modification of the embodiment of the present invention, corresponding to a cross section taken along line C-C of Fig. 15.

Hereinafter, embodiments of the present invention will be described based on the drawings. In the following description, the front, rear, left, and right directions are the same as the direction of the vehicle except where otherwise indicated. Further, an arrow FR in the figure indicates the front side of the vehicle, an arrow UP indicates the upper side of the vehicle, and an arrow LH indicates the left side of the vehicle.

Fig. 1 is a side view showing the entire vehicle in which the battery unit BU of the present embodiment is used.

The vehicle of this embodiment is a scooter type electric motor vehicle 1 of one form of an electric straddle type vehicle. The electric motor vehicle 1 is provided with a footrest 4 for the rider's foot to be placed between the steering handle 2 and the rider's seat cushion 3, and the rear wheel Wr is driven by the electric motor 5. In addition, the motor vehicle 1, the suspension system of the front wheel Wf and the suspension of the rear wheel Wr The systems are respectively supported at the front and rear of the vehicle body frame F, and the seat cushion 3 is supported at an upper portion at a slightly center in the front and rear directions of the vehicle body frame F.

The second to sixth figures are diagrams showing a state in which the outer casing of the electric motor vehicle 1 and the like are appropriately removed.

As shown in the above figures, the body frame F of the main frame portion of the vehicle body includes: a main frame pipe 7 to which the head pipe 6 is coupled at the front end portion (please refer to FIGS. 1 and 4); and in the front-rear direction of the vehicle a substantially central position, perpendicular to the rear end portion of the main frame pipe 7 and forming a combined lower transverse pipe 8; and a pair of left and right rear frame pipes whose front end portions are coupled to the left and right ends of the lower transverse pipe 8 in the vehicle width direction 9.

The main frame tube 7 is composed of a lower frame portion 7a that is inclined rearward and downward from the head pipe 6, and a bottom frame portion 7b that extends slightly rearward from the rear end portion of the lower frame portion 7a. The bottom frame portion 7b is disposed below the center region of the foot board 4 in the vehicle width direction, and is coupled to the lower cross pipe 8 at a position on the rear side of the foot board 4 and substantially immediately below the front end portion of the seat cushion 3.

Further, as shown in Fig. 1, the riser 10 is rotatably held by the head pipe 6 coupled to the main frame pipe 7. The front wheel Wf is rotatably supported by the front fork 11 at the lower end portion of the riser 10, and the above-described handle 2 is coupled to the upper end portion of the riser 10.

The right and left rear frame pipes 9 extend from the connection portion with the lower cross pipe 8 toward the vicinity of the rear end portion of the seat cushion 3 to the upper oblique rear portion, and the rear side region thereof is inclined slightly downward to extend to the vicinity of the rear end portion of the vehicle. Then, the rear end portions of the left and right rear frame tubes 9 are coupled to each other at the rear portion of the vehicle.

Here, if the left and right rear frame tubes 9 are to be "from the lower cross tube 8 The portion extending obliquely upward toward the rear portion is referred to as an inclined frame portion 9a, and the "region extending from the upper end portion of the inclined frame portion 9a to the rear side of the vehicle" is referred to as a cushion rail portion 9b, and the left and right rear frame tubes 9 are mutually In the vicinity of the connection portion between the inclined frame portion 9a and the seat cushion rail portion 9b, the upper cross tube 12 is connected to each other. Next, a seat support bracket 20 that can serve as a mount for the seat lock mechanism not shown in the drawing is protruded from the upper portion of the upper cross pipe 12.

On the front side of the frame tube 9 on the left and right sides, a sub-frame 13 for supporting the pedals of the foot board 4 is supported from below. The rear frame 13 for supporting the pedal has a rear end side and a front edge portion of the right and left rear frame tubes 9 coupled to the upper surface of the lower cross pipe 8, and a front end side thereof is coupled to the bottom frame portion 7b of the main frame pipe 7. Specifically, the sub-frame 13 is configured such that a pair of side frame portions 13a that extend slightly horizontally from the front edge portion of the left and right rear frame tubes 9 to the front side of the vehicle body and from the front side of the frame portions 13a The rim extends to the inner side in the vehicle width direction and is coupled to the lateral frame portion 13b of the bottom frame portion 7b of the main frame tube 7.

Further, on the rear side of the lower cross pipe 8, a sub-frame 15 for supporting the battery unit BU is provided. In the first and second figures, only the battery case 14 of the outline portion of the battery unit BU is displayed. The specific configuration for the battery unit BU will be described in detail later.

The sub-frame 15 for supporting the battery includes a rear frame portion 15a formed of a substantially U-shaped pipe material, and a pair of side frame portions 15b formed of a straight tubular pipe material. The rear frame portion 15a has a central extension region (hereinafter referred to as a "central extension region") arranged to face the vehicle width direction. The curved regions on both sides extend to the upper side, and the respective end portions are respectively coupled to the inclined frame portions 9a of the left and right rear frame tubes 9.

The side frame portion 15b is coupled to the inner extending region of the lower cross pipe 8 and the rear frame portion 15a on the inner side in the vehicle width direction of the left and right rear frame pipes 9 (inclined frame portions 9a). The both side frame portions 15b are arranged in parallel so as to be along the front-rear direction of the vehicle, and on the upper surface side thereof, as shown in Figs. 2, 3, and 6, a metal support plate 16 is placed. The front edge portion of the support plate 16 is also erected on the upper surface side of the lower cross pipe 8, so that the battery unit BU is placed on the upper portion of the support plate 16 supported by the sub-frame 15 and the lower cross pipe 8. . At a suitable position on the support plate 16 on which the battery unit BU is placed, as shown in Fig. 3, a cushion member 17 formed of an insulating rubber material is attached.

Further, a pivot plate 18 is attached to each of the right and left side frame portions 15b of the sub-frame 15, and a pivotal shaft 21 for pivotally supporting the front end portion of the rocker arm 19 is provided on the pivot plate 18 . The rear wheel Wr is rotatably supported at the rear end portion of the rocker arm 19, and an electric motor 5 (including a reduction gear) for driving the rear wheel Wr and a brake mechanism not shown in the drawing are held. Further, the rear end portion of the rocker arm 19 is supported by the cushion rail portion 9b of the rear frame tube 9 through the shock absorber unit 22. In this embodiment, the electric motor 5 is disposed on the left side portion of the rear wheel Wr among the rocker arms 19.

Further, as shown in Fig. 1, a suitcase 23 for storing an article such as a helmet or a small thing is disposed below the seat cushion 3 on which the rider rides. The trunk 23 is formed in a box shape in which an "upper opening is formed" by a hard resin material, and an opening portion at the upper portion is formed by the seat cushion 3. Can be opened and closed. Further, reference numeral 24 in the first and second figures is an opening and closing pin for rotatably supporting the front end portion of the seat cushion 3 at the front end portion of the trunk 23.

The trunk 23 has a bottom wall adjacent to the lower surface of the front portion, and is supported by the trunk mounting bracket 25 of the metal plate-like component to be supported by the inclined frame portion 9a of the left and right rear frame tubes 9, and the upper opening edge of the rear end side is The upper cross tube 12 is supported by the seat cushion support bracket 20. On the other hand, the figure B1 in the figure is a bolt for fixing the rear end portion of the trunk 23 to the upper surface of the cushion supporting bracket 20.

As shown in FIGS. 2 and 3, the trunk mounting bracket 25 includes a support beam portion 25a that extends in the vehicle width direction and receives the load of the trunk 23, and downward from both end portions of the support beam portion 25a. The bent connecting portion 25b; and a fixing flange 25c that is bent outward from the lower end portion of each connecting portion 25b in the vehicle width direction. The bottom wall of the trunk 23 is placed on the upper surface of the support beam portion 25a, and the bottom wall of the trunk 23 is fixed by a bolt B2. The support beam portion 25a and the connecting portion 25b of the trunk mounting bracket 25 are disposed on the outer surface of the upper surface and the side surfaces of the battery case 14.

Further, in the inclined frame portion 9a of each of the left and right rear frame tubes 9, a portion having a substantially U-shaped cross section is protruded upward at a portion (position) corresponding to a substantially central portion in the front-rear direction of the battery supporting sub-frame 15. Bracket 26. The support bracket 26 has the opening side of the U-shaped cross section welded and fixed to the corresponding inclined frame portion 9a, and a flat load receiving surface 26a is disposed at an end portion that protrudes upward from the fusion fixing portion. The load receiving surface 26a of the support bracket 26 is disposed at a position facing the left and right fixing flanges 25c of the trunk mounting bracket 25.

Further, as shown in FIGS. 1 and 2, the battery case 14 of the battery unit BU includes a case body 27 in which an opening is formed in the upper portion, and a case cover 28 which is closably attached to the upper portion of the case body 27. The cartridge body 27 and the lid 28 are formed of a hard resin material.

Further, locking flanges 27a and 28a are respectively protruded from the side portions of the cartridge body 27 and the lid 28 in the vehicle width direction. The left and right locking flanges 27a and 28a are overlapped in the up-and-down direction in a state in which the lid 28 is closed, and are sandwiched between the "bearing receiving surface 26a of the support bracket 26" and the "luggage compartment" in this state. Between the corresponding fixing flanges 25c" of the brackets 25. In this manner, the locking flanges 27a and 28a sandwiched between the load receiving surface 26a and the fixing flange 25c are fixed to the support bracket 26 and the fixing flange 25c by the bolts 29 as the locking members.

Fig. 7 is a view showing a cross section of a fixing portion of the locking flanges 27a and 28a.

As shown in the figure, bolt insertion holes 30, 31 are formed in the corresponding portions of the load receiving surface 26a of the support bracket 26 and the fixing flange 25c of the trunk mounting bracket 25, and the locking flanges 27a, 28a are formed. Through holes 32, 33 having a larger diameter than the bolt insertion holes 30, 31 are formed. In the through holes 32 and 33 of the locking flanges 27a and 28a, a metal collar 34 having a shaft length substantially equal to the total thickness of the locking flanges 27a and 28a is inserted. Further, a welding nut 35 for locking the bolt 29 is provided on the back side of the load receiving surface 26a of the support bracket 26.

The trunk mounting bracket 25 has a locking flange 27a interposed between the left and right fixing flanges 25c and the load receiving surface 26a of the support bracket 26, In the state of 28a, the left and right fixing flanges 25c are locked and fixed to the corresponding support brackets 26 by bolts 29. At this time, the shaft portion of the bolt 29 penetrates the inside of the metal collar 34, and the locking load of the bolt 29 is received by the collar 34.

As described above, if the fixing flange 25c is locked and fixed to the support bracket 26 in a state in which the locking flanges 27a, 28a have been clamped, the trunk mounting bracket 25 for supporting the trunk 23 will pass through. The support bracket 26 is coupled to the left and right rear frame tubes 9 (body frame F), and the battery case 14 is fixed to the rear frame tube 9 (body frame F). As a result, a specific gap is provided between the upper surface of the fixed battery case 14 and the support beam portion 25a of the trunk mounting bracket 25.

Moreover, the connection cables 41a and 41d for power supply mentioned later are pulled out from the battery case 14. The connection cables 41a and 41d are connected to the control unit 36 and the DC-DC converter 37 shown in FIG.

The control unit 36 includes a PDU (Power Drive Unit) for supplying current to the electric motor 5 for connecting a three-phase cable not shown in the drawing of the PDU and the electric motor 5, through the rocker arm 19 Wiring is formed in the casing. Further, the control unit 36 is supported by the inclined frame portion 9a of the right rear frame tube 9 at a position on the right side in the vehicle width direction on the rear side of the trunk 23.

The DC-DC converter 37 is a low-voltage power system that is connected to the vehicle through a connection cable that is not shown in the drawing. Further, the DC-DC converter 37 is supported by the inclined frame portion 9a of the right rear frame tube 9 at the right side portion of the trunk 23. Specifically, the DC-DC converter 37 is solidified The bracket 38 that protrudes forward from the inclined frame portion 9a on the right side is set to be provided on the right side portion of the trunk 23.

8 to 12 are diagrams showing the detailed structure of the battery unit BU.

As shown in FIG. 8, the battery unit BU includes: four battery modules 40A, 40B, 40C, and 40D; and the battery case 14 in which the battery modules 40A, 40B, 40C, and 40D are housed; and a battery The inside of the case 14 is connected to the six connection cables 41a to 41f of the electrode terminals Tp and Tn of the battery modules 40A, 40B, 40C, and 40D; and inside the battery case 14, overlaps the plurality of battery modules 40A and 40B. 40C, 40D guide plate 42 having the end faces of the electrode terminals Tp, Tn; and a mounting plate 43 for fixing the plurality of battery modules 40A, 40B, 40C, 40D to the battery case 14 through the guide plate 42 (Battery limiting member).

Each of the battery modules 40A, 40B, 40C, and 40D has a rectangular body shape in which one side is longer than the other two sides, and the long side is housed in the battery case 14 in the vertical direction. In the following description, the "upper" and "lower" described for the battery modules 40A, 40B, 40C, and 40D are in a state of being stored in the battery case 14 unless otherwise specified (instructed). Up and down, in addition, "upper", "down" or "front", "back", or "left" and "right" as described for the battery unit BU means that the battery unit BU is assembled to the vehicle body. Up and down, front and back, left and right of the state.

The electrode terminals Tp and Tn of the battery modules 40A, 40B, 40C, and 40D are disposed on the upper surface side. In addition, each battery module 40A, The 40B, 40C, and 40D have a rectangular shape in a plan view in which the lengths of the adjacent sides are different. The positive and negative electrode terminals Tp and Tn on the battery modules 40A, 40B, 40C, and 40D are disposed on the upper surfaces of the battery modules 40A, 40B, 40C, and 40D, and the both ends on the long sides. nearby.

The arrangement of the battery modules 40A, 40B, 40C, and 40D in the battery case 14 is such that the three battery modules 40B, 40C, and 40D are arranged in the left-right direction, and the long side in the plan view angle is oriented in the front-rear direction. The remaining battery modules 40A are disposed on the front side of the three battery modules 40B, 40C, and 40D, and the long sides in the plan view angle are oriented in the left-right direction.

The battery case 14 includes a case body 27 having an opening formed on the upper side as described above, and a case cover 28 attached to the upper portion of the case body 27, the case body 27 and the case cover 28 for the battery modules 40A, 40B, 40C, The 40D is disposed inside and has a concave shape. However, since the battery modules 40A, 40B, 40C, and 40D are mainly housed on the cartridge body 27 side, the depth of the concave portion on the cartridge body 27 side is deeper than the depth of the concave portion on the cartridge cover 28 side.

Further, at the upper edge portion of the cartridge body 27 and the lower edge portion of the cover 28, peripheral flanges 27b and 28b which are formed to be in contact with each other are formed. A sealing member (not shown) is fitted between the peripheral flanges 27b and 28b.

Further, the cover 28 has a through hole 44 for pulling the connection cables 41a and 41d for power supply to the outside on the left side wall, and a grommet 45 is attached to the through hole 44. Similarly, a through hole 46 for "pulling the connecting cables 41c, 41f for connecting the fuses to the outside" is formed on the upper wall of the cover 28, and is formed in the through hole 46. A grommet 47 is provided.

The guide plate 42 is formed into a plate shape having a substantially constant thickness by an insulating soft resin material, and the shape in a plan view is formed to correspond to the battery module 40A arranged in the cartridge body 27 of the battery case 14. The shape of the upper shape of 40B, 40C, and 40D.

As shown in FIGS. 9 to 12, the guide plate 42 has an opening 48 formed in a portion corresponding to the "electrode terminals Tp, Tn" of the battery modules 40A, 40B, 40C, and 40D in the cartridge body 27. Each of the openings 48 is a portion where the electrode terminals Tp and Tn of the battery modules 40A, 40B, 40C, and 40D are exposed on the upper side of the guide plate 42, and is configured to "connect the connecting cables 41a to 41f. The upper side of the guide plate 42 is connected to the terminal connection portion of the corresponding electrode terminal Tp, Tn".

On the upper surface of the guide plate 42, a plurality of guide claws 49a, 49b, 49c, and 49e that "hold the connection cables 41a, 41b, 41c, and 41e in a specific direction" are protruded, and are attached to the operator. The strip wiring indication marks 50a to 50f (wiring indicating portions) that connect the wiring directions of the cables 41a to 41f are visually recognized. Each of the guide claws 49a, 49b, 49c, and 49e is formed by "a pair of protrusions that protrude from the upper surface of the guide plate 42 by a certain width", and is formed to hold between the pair of protrusions. Corresponding connection cables 41a, 41b, 41c, 41e. In this embodiment, the guide claws 49a, 49b, 49c, and 49e and the wiring indication marks 50a to 50f constitute a wiring guide for "wiring for connecting the connection cables 41a to 41f on the upper surface of the guide plate 42". Means.

In addition, in the upper surface of the guiding plate 42, near the opening 48 The position is attached: polarity indication marks 51p and 51n for allowing the operator to visually recognize that "the electrode terminals Tp and Tn disposed in the opening 48 are positive or negative".

The mounting plate 43 is formed of a hard resin material and has a substantially T-shaped strip shape. Specifically, the mounting plate 43 includes a lateral (width-direction) belt portion 43a that is stretched in the left-right direction on the upper surface of the guide plate 42, and a front belt portion that extends forward from the center in the longitudinal direction of the lateral belt portion 43a. 43b, the both edges of the extending direction of the lateral belt portion 43a and the front edge portion of the front belt portion 43b are provided with a locking flange 52 by bending the bent portion (not shown) downward. Each of the locking flanges 52 is locked and fixed to the upper edge portion of the cartridge body 27 by a bolt 53.

As shown in FIG. 9, the battery modules 40A, 40B, 40C, and 40D partially protrude from the upper side of the cartridge body 27 in a state of being housed in the opening of the cartridge body 27. The guide sheets 42 are downloaded and placed on the upper surface of the "battery modules 40A, 40B, 40C, 40D housed in the cartridge body 27" in the above state. The lateral belt portion 43a and the front belt portion 43b of the mounting plate 43 are mounted on the upper surface of the guide plate 42 in the above state, and the respective locking flanges 52 are locked and fixed to the upper surface of the cartridge body 27. At this time, the attachment plate 43 is fixed to the cartridge body 27 in a state where the guide plate 42 is pressed against the upper surface of the battery modules 40A, 40B, 40C, and 40D. As a result, the battery modules 40A, 40B, 40C, 40D are confined within the cartridge body 27 together with the guide sheets 42.

Here, the internal wiring of the battery unit BU formed by each of the connection cables 41a to 41f will be described with reference to FIG.

The power supply connection cables 41a and 41d that are pulled to the outside of the battery case 14 by the grommet 45 are respectively connected to the electrode terminal Tn of the negative electrode of the battery module 40A on the front side and the positive electrode of the battery module 40D on the left side of the rear side. Electrode terminal Tp.

The electrode terminal Tp of the positive electrode of the battery module 40A on the front side is connected to the electrode terminal Tn of the negative electrode of the battery module 40B on the right side via the connection cable 41b. Thereby, the front side battery module 40A and the rear right side battery module 40B are connected in series. Further, the electrode terminal Tp of the positive electrode of the battery module 40B on the right side of the rear portion is connected to the connection cable 41c for fuse connection.

Further, the electrode terminal Tn of the negative electrode of the battery module 40D on the left side of the rear portion is connected to the electrode terminal Tp of the positive electrode of the battery module 40C at the center of the rear portion via the connection cable 41e. Thereby, the battery module 40D on the left side of the rear portion is connected in series with the battery module 40C in the center of the rear portion. Further, the electrode terminal Tn of the negative electrode of the battery module 40C at the center of the rear portion is connected to the connection cable 41f for fuse connection.

The end portions of the connection cables 41a to 41f and the electrode terminals Tp and Tn are connected by small screws from the upper side of the guide plate 42.

The connecting cables 41c and 41f for connecting the fuses are pulled out to the outside of the battery case 14 by the grommet 47, and the ends of the connecting cables 41c and 41f that are pulled out are pulled from the bottom wall of the trunk 23. It enters the inside of the trunk 23 and is connected to the "fuse box 54 of the bottom wall installed in the trunk 23". In other words, the interconnected battery modules 40A, 40B; and the battery modules 40D, 40C are formed by the fuse box 54. In series. The fuse box 54 will be described in detail later.

The battery unit BU of the above configuration is assembled as follows.

First, the electrode terminals Tp and Tn are directed upward, and the battery modules 40A, 40B, 40C, and 40D are housed in the cartridge body 27 of the battery case 14 in the above-described arrangement.

According to this state, the guide plate 42 is placed on the upper surface side of the battery modules 40A, 40B, 40C, 40D, and in this state, the mounting plate 43 is covered on the upper portion of the guide plate 42, and the mounting plate 43 is used. The guide plate 42 is pressed against the upper surface of the battery modules 40A, 40B, 40C, 40D, and the locking flange 52 of the mounting plate 43 is locked and fixed to the cartridge body 27.

In this state, the electrode terminals Tp and Tn of the battery modules 40A, 40B, 40C, and 40D are exposed to the upper side through the opening 48 of the guide plate 42, and the plate 43 is not mounted on the upper surface of the guide plate 42. The covered portion exposes the wiring indication marks 50a to 50f corresponding to the respective connection cables 41a to 41f, and the guiding claws 49a, 49b, 49c, 49e are protruded in the middle of the belt extending region of the wiring indication marks 50a, 50b, 50c, 50e. .

Then, according to this state, wirings corresponding to the connection cables 41a to 41f are performed on the electrode terminals Tp and Tn on the upper side of the guide plate 42.

At this time, the operator pulls the cables 41a to 41f on the guide plate 42 so as to follow the belt indication marks 50a to 50f, and connects the cables 41a, 41b, 41c, and 41e halfway. Partially held in the guiding claws 49a, 49b, 49c, 49e, and each connecting cable The ends of 41a to 41f are connected to the corresponding electrode terminals Tp and Tn.

After that, the end portions of the connection cables 41a and 41d for power supply and the connection cables 41c and 41f for the fuse are pulled out to the outside through the grommet 45, 47 on the side of the cover 28, and the cover is placed in this state. The cover 28 covers the upper portion of the case body 27, and the cover 28 is locked and fixed to the case body 27.

Here, the fuse box 54 connected to the connection cables 41c and 41f will be described with reference to FIGS. 2, 13, and 14. Figs. 13 and 14 are cross-sectional views showing portions of the trunk 23 and the fuse box 54 corresponding to the B-B section in Fig. 2.

The fuse box 54 includes a fuse case 55 connected to the connection cables 41c and 41f, and a fuse 56 detachably attached to the terminal portion in the fuse case 55.

An arm portion 55a for attachment is extended to the fuse case 55, and the arm portion 55a is formed to be locked and fixed to the bottom wall of the trunk 23 by a bolt 57. Next, the front end portion of the bolt 57 for fixing the fuse housing 55 penetrates the bottom wall of the trunk 23, and is locked and fixed to the upper wall of the cover 28 of the battery case 14. The reference numeral 58 in Figs. 13 and 14 is a nut fixed to the inner wall of the trunk 23, and the reference numeral 59 is for the arm portion 55a of the fuse housing 55 to be stably supported by the nut 58. The end face is fitted to a metal bracket between the arm portion 55a and the nut 58. Further, reference numeral 60 is a cover that is installed in the trunk 23 to cover the outside of the fuse box 54.

The portion of the arm portion 55a that is locked by the bolt 57 is set such that when the fuse 56 is attached to the fuse housing 55, the bolt 57 The upper (front) direction of the loading and unloading operation is covered by the fuse 56.

For this reason, when the fuse housing 55 is detached from the trunk 23 and the connecting cables 41c, 41f are removed from the bottom of the trunk 23, the fuse 56 must be taken out of the fuse housing 55. In other words, after the cover 60 is removed, if the fuse 56 is taken out of the fuse case 55 as shown in Fig. 14, the bolt 57 that "locks the fixed fuse case 55" can be carried out from the inside of the trunk 23. In the state where the fuse 56 is not removed, the fuse 56 will cause an obstacle and the bolt 57 cannot be removed.

Further, the bolt 57 that fixes the fuse housing 55 to the trunk 23 is also locked to the upper surface of the cover 28 of the battery case 14. For this reason, the trunk 23 cannot be separated from the battery case 14 in a state where the fuse box 54 (fuse housing 55) is not removed from the bottom wall of the inner side thereof. Therefore, if the fuse box 54 is not detached from the trunk 23, the operation of detaching the battery unit BU from the vehicle body or opening the lid 28 to the inside of the battery case 14 cannot be performed.

In the electric motor vehicle 1, the removal of the battery unit BU is performed in the following manner. First, the seat cushion 3 is lifted to open the upper portion of the trunk 23, and the operator extends the hand from the opening in the upper portion of the trunk 23, and the fuse 56 is removed from the fuse box 54 in the trunk 23 as described above, and is unloaded. After the bolt 57, the fuse case 55 is taken out from the trunk 23.

Next, in the above state, the casing of the related vehicle body is removed, and then the bolts B2 and B1 before and after the trunk 23 are removed, and the trunk 23 is detached from the vehicle body together with the seat cushion 3.

After that, the bolts 29 of the left and right fixing flanges 25c of the trunk mounting bracket 25 are removed, and the lock of the support bracket 26 (the rear frame tube 9) by the trunk mounting bracket 25 is released. The battery unit BU can be taken out from the vehicle body in this state.

In the electric motor vehicle 1, since the above-described fuse box 54 mounting structure is employed, the battery unit BU cannot be taken out without the fuse 56 being taken out. According to this, the take-out operation of the battery unit BU can be performed safely throughout.

In the battery unit BU used in the electric motor vehicle 1, a guide plate 42 is attached to the upper surfaces of the plurality of battery modules 40A, 40B, 40C, and 40D housed in the casing main body 27, and the guide plate 42 is mounted on the guide plate 42. 42: an opening 48 for exposing the electrode terminals Tp and Tn of each of the battery modules 40A, 40B, 40C, and 40D to the upper side; and wiring indication marks 50a to 50f for guiding the wiring operation of the connection cables 41a to 41f Since the guide claws 49a, 49b, 49c, and 49e are provided, the connection cables 41a to 41f can be easily and surely connected to the corresponding electrode terminals Tp and Tn without depending on the skill of the operator.

In other words, in the battery unit BU, since the wiring indication marks 50a to 50f are indicated on the upper surface of the guide plate 42, the operator can perform wiring along the wiring indication marks 50a to 50f, so that the operator can easily And the job is executed reliably. Further, since the guide claws 49a, 49b, 49c, 49e are provided at appropriate positions on the guide plate 42, the intermediate portions of the connection cables 41a, 41b, 41c, 41e can be held by the guide claws 49a, 49b. , 49c, 49e, and easily connect the connecting cables 41a, 41b, The wiring of 41c, 41e can be made to face the connecting cables 41a, 41b, 41c, 41e in the correct direction by the guiding claws 49a, 49b, 49c, 49e. Therefore, with the above configuration, the connection workability of the pole connecting cables 41a, 41b, 41c, and 41e to the terminals Tp and Tn can be improved.

If the lengths of the connection cables 41a to 41f are set to be different, and a plurality of guide claws are protruded from the wiring tracks of the connection cables 41a to 41f on the guide plate 42, when the wiring of the connection cables 41a to 41f is incorrect. The operator can be made aware of the wiring error by the length of the connection cables 41a to 41f being too long or too short.

Further, in the battery unit BU of the embodiment, since the guide sheets 42 crimped to the upper surfaces of the battery modules 40A, 40B, 40C, and 40D are formed of an insulating soft resin, even a plurality of batteries are provided. The heights of the upper surfaces of the modules 40A, 40B, 40C, and 40D are inconsistent, and the inconsistency in the height can be absorbed by the deformation of the guide plate 42, and the battery module 40A in the battery case 14 can be surely suppressed. , 40B, 40C, 40D shaking.

In addition, the conduction terminal that "conducts the electrode terminals Tp and Tn of the battery modules 40A, 40B, 40C, and 40D on the lower side" can be provided as the terminal connection portion on the guide plate 42, but this embodiment is implemented. In the embodiment, the opening 48 is provided in a portion corresponding to the electrode terminals Tp and Tn on the guide plate 42, and the electrode terminals Tp and Tn are exposed to the upper side through the opening 48. Therefore, the guide plate 42 is simplified. The construction achieves the benefits of reduced product cost.

However, the present invention is not limited to the above embodiment. A wide variety of design changes can be made without departing from the spirit of the invention.

For example, in the above-described embodiment, the wiring indication marks 50a to 50f and the guiding claws 49a, 49b, 49c, and 49e constitute a wiring guiding means for guiding the wiring of the connecting cables 41a to 41f, but The wiring guiding means may be any of "wiring indicating signs 50a to 50f" or "guide claws 49a, 49b, 49c, 49e". Further, a guide groove "a route along the connection cables 41a to 41f" may be formed on the upper surface of the guide plate 42, and the connection cables 41a to 41f may be fitted to the guide grooves.

Further, in the above-described embodiment, the fuse case 54 is attached to the inner wall of the trunk 23, and the fuse case 55 is locked to the battery case 14 together with the trunk 23 (the cover). 28) The bolt 57 has its head covered by the fuse 56. It is necessary to remove the fuse 56 before removing the battery unit BU, but "forcing the operator to remove the fuse 56 before removing the battery unit BU" For the means, the structures shown in Figs. 15 and 16 can also be employed.

In the following, the structure of the modification shown in Figs. 15 and 16 will be described, and the same portions as those of the basic embodiment shown in Figs. 1 to 14 will be denoted by the same reference numerals and will not be omitted.

Fig. 15 is a perspective view showing a battery unit BU of the modification, and Fig. 16 is a cross-sectional view corresponding to a C-C cross section in Fig. 15.

In this modification, the fuse box 154 is integrally attached to the upper surface of the upper wall of the cover 28 of the battery case 14. Fuse box 154, will be connected The fuse case 55 connecting the cables 41c and 41f and the fuse 56 detachably attached to the terminal portion in the fuse case 55 are housed in the cover 160 for covering both of them. The cover 160 is formed by the bottom wall 160a and the cover portion 160b, and the bottom wall 160a and the cover portion 160b are assembled and disassembled by small screws. The fuse case 55 is placed on the bottom wall 160a, and the fuse 56 can be attached to and detached from the fuse case 55 with the cover portion 160b removed.

Further, the bottom wall 160a of the cover 160 is locked and fixed to the upper surface of the cover 28 by a bolt 63 which "fixes the cover 28 of the battery case 14 and the case body 27 to each other". As shown in Fig. 16, the head of the bolt 63 is covered by the "fuse 56 attached to the fuse case 55". For this reason, if the fuse 56 is not removed from the fuse housing 55, the bolt 63 cannot be removed.

In the case of the configuration of this modification, although the trunk can be removed from above the battery unit BU before the fuse 56 is removed, the battery case 14 cannot be removed unless the fuse 56 is removed from the fuse housing 55. The lid 28 performs an operation on the inside of the battery unit BU. Accordingly, in the case of this configuration, the operator is forced to remove the fuse 56 before disassembling the battery unit BU.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, although the battery unit BU is applied to a Scooter type electric motor vehicle (two-wheeled vehicle) in the above embodiment, the applicable vehicle may be an electric tricycle or a four-wheeled vehicle.

BU‧‧‧ battery unit

Tp, Tn‧‧‧ electrode terminals

14‧‧‧ battery case

27‧‧‧ box body

27a‧‧‧Lock flange

27b‧‧‧ peripheral flange

28‧‧‧ lid

28a‧‧‧Lock flange

28b‧‧‧ peripheral flange

29‧‧‧Bolts

32, 33‧‧‧through holes

40A~40D‧‧‧ battery module

41a~41f‧‧‧Connecting cable

42‧‧‧Guideboard

43‧‧‧Installation plate (battery limiting member)

43a‧‧‧Transverse belt

43b‧‧‧Front belt

44‧‧‧through holes

45‧‧‧sand

46‧‧‧through holes

47‧‧‧Sorcer

48‧‧‧ openings (terminal connection)

49a~49c, 49e‧‧‧ Guide claws (wiring guidance means)

50a~50f‧‧‧Wiring indicator (wiring indication part, wiring guidance means)

52‧‧‧Lock flange

53‧‧‧Bolts

54‧‧‧Fuse box

Claims (7)

A battery unit comprising: a plurality of battery modules (40A to 40D) having electrode terminals (Tp, Tn); and internally accommodating the plurality of battery modules (40A to 40D) as electrode terminals (Tp, Tn) a battery case (14) facing the same side; and a plurality of connection cables (41a to 41f) connected to the electrode terminals (Tp, Tn) of the battery modules (40A to 40D) inside the battery case (14) And a guide plate (42) mounted across an end surface of the plurality of battery modules (40A to 40D) having the electrode terminals (Tp, Tn); wherein the guide plate (42) is provided with: The connection cable (41a to 41f) is connected to the terminal connection portion of the electrode terminal (Tp, Tn) from the surface opposite to the side facing the plurality of battery modules (40A to 40D). And wiring guiding means (49a, 49b, 49c, 49e, 50a to 50f) for guiding the wiring of the aforementioned connecting cables (41a to 41f) on the opposite side surface. The battery unit according to claim 1, wherein the wiring guiding means includes: guiding claws (49a, 49b, 49c, 49e) for holding the connecting cables (41a to 41f) in a specific direction. The battery unit according to claim 1 or 2, wherein the wiring guiding means is provided for allowing an operator to visually recognize the connection The wiring instruction portions (50a to 50f) in the wiring direction of the cables (41a to 41f) are connected. The battery unit according to claim 3, wherein the wiring instruction unit is a guide groove into which the connection cables (41a to 41f) are fitted. The battery unit according to the first or second aspect of the invention, wherein the terminal connection portion is an opening that exposes the electrode terminal (Tp, Tn) on a side opposite to the side of the guide plate (42) (48). The battery unit according to claim 1 or 2, wherein the guide plate (42) is made of an insulating soft resin. The battery unit according to claim 1 or 2, further comprising: a battery limiting member (43) for restricting the plurality of battery modules (40A to 40D) to the battery case (14), wherein the battery limitation The member (43) restricts the plurality of battery modules (40A to 40D) to the battery case (14) through the guide plate (42).