TWI422501B - The electric vehicle is equipped with a battery - Google Patents

Description

Electric vehicle battery mounting structure

The present invention relates to a battery mounting structure for an electric motor vehicle.

Conventionally, in an electric motor vehicle such as a hybrid electric vehicle, a structure in which a battery is disposed below a foot portion has been proposed.

By disposing the battery as a weight under the footrest portion, it is possible to reduce the center of gravity of the vehicle (refer to Patent Document 1).

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2005-139942

However, the above-described battery device is used in a locomotive, and is, for example, susceptible to vibration as compared with the case of use in an automobile. In particular, since the wheel base is short, the vibration of the forward and backward movement in the forward direction of the vehicle becomes remarkable. Moreover, since such a battery is generally constituted by a battery in which a minimum unit called a battery element (hereinafter referred to as an element) is connected in plural, the force acting on the vehicle from the outside is used. The influence becomes easy to affect the connection portions of the components to each other. Therefore, it is desirable to provide a battery mounting structure that can minimize the influence on the connection state between components.

Therefore, the present invention has an object of providing a battery mounting structure for an electric motor vehicle which can minimize the influence on the connection state between components constituting the battery.

In order to achieve the above object, the invention described in the first aspect of the invention is a battery mounting structure for an electric motor vehicle, comprising: a unit for connecting components (for example, the components 54 in the embodiment) to each other. A module (for example, a single module 37T in the embodiment) is provided with a plurality of connected batteries (for example, the battery module 37 in the embodiment), and a driving force for generating the vehicle based on the power supplied from the battery. The electric motor (for example, the electric motor 50 in the embodiment) and the control unit for controlling the driving of the electric motor (for example, the control device 34 in the embodiment), the electric vehicle battery mounting structure is characterized in that The terminal portion (for example, the anode connection terminal 67 and the cathode connection terminal 68 in the embodiment) in which the plurality of modules are combined is disposed in one of the wide directions of the vehicle.

According to the invention of the second aspect of the invention, the plurality of elements are arranged in a plurality of positions in the vertical direction, and the voltages of the respective elements are monitored (for example, voltage and temperature monitoring in the embodiment) The substrate 64) is disposed at the lower side.

The invention described in claim 3 is characterized in that the unit is provided on the same side as the terminal portion and on the lower side thereof.

The invention described in claim 4 is characterized in that a connector for communicating between the modules (for example, the communication connector 75 in the embodiment) is provided in the unit and the terminal portion. between.

The invention described in claim 5 is characterized in that an internal pressure release valve (for example, an internal pressure release valve 59 in the embodiment) is provided at the aforementioned element, and is provided to be interposed between the internal pressure release valves The collected electrolyte is used for collecting the electrolyte discharge pipe (for example, the electrolyte discharge pipe 62 in the embodiment), and the electrolyte discharge pipe is disposed on one side of the wide direction of the vehicle. .

The invention described in claim 6 is characterized in that the modules are electrically connected to each other by a network cable.

The invention according to claim 7 is characterized in that the modules are physically coupled to one another by inserting the other convex portion (for example, the convex portions 80, 82, 84 in the embodiment) into one of the modules. The recessed portion (for example, in the recessed portions 81, 83, and 85 in the embodiment) is fixed.

According to the invention described in the application item 1, even when a large external force is applied to the vehicle and there is a front-rear movement in the forward direction of the vehicle, since the system is provided with "will be set in advance with the vehicle." Since the terminal portions of the modules in the direction of the vehicle in the wide direction are connected to each other, the amplitude of the vibration in the front-rear vibration is less likely to be affected, and the influence of the external force can be minimized.

According to the invention described in the application items 2 and 3, it is possible to achieve a low center of gravity and to save an arrangement space.

According to the invention described in the application item 4, the space can be effectively utilized.

According to the invention described in the application item 5, the maintenance is easy.

According to the invention described in the application item 6, since the connection formed by the network cable is used, even if the relative distance between the modules is changed due to vibration, it is possible to Soft correspondence.

According to the invention described in the application 7, the combination of the modules and the electrically connected state can be made more reliable.

Next, an embodiment of the present invention will be described based on the drawings. In the following description, the FR system represents the front side of the vehicle, and the L system represents the left side of the vehicle.

Fig. 1 is a side view showing an electric motor vehicle according to an embodiment of the present invention. In addition, FIG. 2 is a perspective view showing a state in which the components other than the electric motor vehicle 1 are removed.

As shown in FIG. 1 and FIG. 2, the electric motor vehicle 1 is a scooter type locomotive having a stepping portion F, and is built in a swing arm (SWING ARM) 12. The rotational driving force of the electric motor 50 for traveling drive is used to drive the rear wheel WR. Further, the high-voltage battery 31 that supplies electric power to the electric motor 50 is charged by connecting an external power source to a charging port (not shown) provided at the vehicle body.

At the side end portion of the main frame 2, a head pipe 3 to which the steering rod 7a is rotatably pivoted is coupled. A steering lever 7 is attached to the upper portion of the steering lever 7a, and a pair of left and right front forks 4 are attached to the lower portion. At the lower end of the front fork 4, the front wheel WF is rotatably pivoted.

At the upper center portion of the main frame 2, the upper end portion of the pair of right and left side frames 5, 5 is joined, and the side frame 5 is extended obliquely downward from the place and curved, and then horizontally The upper portion is extended so as to be held by the horizontal portion of the left and right side frames 5, and a high voltage battery 31 that supplies electric power to 72 V at the electric motor 50 is disposed. The side frame 5 has a horizontal portion that stands up obliquely rearward and is bent over the vehicle body, and is coupled to a rear frame 6 that supports the storage box 17 or the like.

Between the side frames 5, 5, a lower lateral frame 24 is attached to the front side, and at the central portion of the lower lateral frame 24, the lower end portion of the main frame 2 is coupled. Behind the lower lateral frame 24, a lower lateral rear frame 25 is attached between the side frames 5, 5. The high voltage battery 31 is held from front to back by the lower lateral frame 24 and the lower lateral rear frame 25. That is, the periphery of the high-voltage battery 31 is surrounded by the left and right side frames 5, 5 and the lower lateral frame 24 and the lower lateral rear frame 25, and is strongly attached to the vehicle side.

Here, in each of the side frames 5, the side brackets 23 having the U-shaped cross section are attached to the side portions of the high voltage battery 31, and are mounted so as to straddle the side brackets 23: The high voltage battery 31 is fixed to the fixing plate 22 on the side frame 5 in the wide direction of the vehicle.

At the rear of the side frame 5, a pivot plate 20 is mounted, at which the swing arm pivot 11 is formed. At the swing arm pivot 11, the front end of the swing arm 12 is rotatably supported, and the swing arm 12 is a cantilever type in which the rear wheel WR is supported only by the arm on the left side in the wide direction of the vehicle. At the rear portion of the swing arm 12, a rear wheel WR is rotatably supported via an axle 19, and the rear end of the swing arm 12 is suspended by the rear suspension unit 13 at the rear frame 6.

At a lower portion of the swing arm 12, a direct current that is supplied from the high voltage battery 31 is converted into an alternating current and supplied to the power drive unit 35 at the electric motor 50, and is housed in the cover member 21. From the power drive unit 35, electric power is supplied to the motor 50 via the wiring L, and power is transmitted from the motor 50 to the axle 19 via the first reduction gear G1 and the second reduction gear G2. , rear wheel WR. In addition, H represents a smoothing capacitor.

At the front side of the vehicle body of the steering lever 7, the fairing 9 is provided as an exterior part, and at the upper part of the front fairing 9, a meter unit 8 including a speedometer or the like is attached.

At the front side of the vehicle body of the front fairing 9, a headlight 10 is provided. Further, at the upper portion of the high-voltage battery 31, a step portion F in which the occupant places the foot is formed, and a seat fairing 15 is provided outside the rear frame 6. At the upper portion of the seat fairing 15, a seat 14 that is opened and closed by a hinge on the front side of the vehicle body is attached. Further, a tail light device 16 is attached to the rear end portion of the seat fairing 15. At the pivot plate 20, a center stand 18 is provided which is provided with two legs which are separated in the vehicle width direction.

At the right side of the head pipe 3 in the width direction of the vehicle, at the battery case 30a, a 12V low-voltage battery 30 that supplies electric power to an auxiliary device such as the headlight 10 or the control device 34 is placed. And is fixed to the battery case 30a via the push plate 30b. The low voltage battery 30 is charged via the power of the high voltage battery 31. In front of the compartment 17 on the inner side of the seat fairing 15, a DC-DC converter 32 for converting the 72V voltage of the high voltage battery 31 to 12V, and a fuse or a repeater are disposed. The contactor box 33 is housed. Further, a control device (ECU) 34 that controls the electric motor 50 via the power driving unit 35 or the like is disposed outside the frame 6 on the right side in the vehicle width direction.

3 is a side view of a frame around a high voltage battery, FIG. 4 is a perspective view of FIG. 3, FIG. 5 is a top view of FIG. 3, and FIG. 6 is a cross-sectional view taken along line AA of FIG. 7 is a cross-sectional view taken along line BB of FIG. 5.

As shown in FIGS. 3 to 5, the high voltage battery 31 is composed of a battery case 36 provided below the step portion F and a battery module 37 disposed inside the battery case 36. The upper horizontal frame 26 is attached to the upper portion of the lower lateral frame 25 so as to straddle between the side frames 5, 5.

Here, in the lower lateral frame 24 and the lower lateral rear frame 25, the respective end portions are connected to each other, and are provided for the high voltage battery 31 when the vehicle is overturned and crossed the stage difference. Protective plate 27 for protection. A pair of lower protective members 28 (refer to FIG. 6) are mounted across the lower lateral frame 24 and the lower lateral rear frame 25 in the front-rear direction to protect the bottom wall 36t of the battery case 36.

At the side bracket 23, a flange portion 36f provided at a side portion of the battery case 36 is formed in a manner avoiding the fixing frame 22, and the flange portion 36f is welded and fixed to the side frame. The upper surface of the side bracket 23 at the five places is fixed via the screw 29. Here, as shown in Fig. 6, generally, a rubber-made mounting member 38 is attached to the locking portion of the screw 29 of the flange portion 36f.

As shown in Figs. 6 and 7, the battery case 36 is generally constituted by a case body 39 having a bottom box type and a cover 41 covering the upper opening portion 40 of the case body 39. The case body 39 and the lower surface of the bottom wall 36t are provided with ribs 36l for improving rigidity, and grooves 42 are formed at both side edges of the upper surface of the bottom wall 36t. The flange portion 36f described above is formed at both side edges of the upper opening portion 40 of the cartridge body 39. At the periphery of the upper opening portion 40 of the cartridge body 39, a fitting groove 43 is formed, and at the periphery of the opening of the cover 41, a fitting portion 44 that is fitted into the fitting groove 43 is formed. The fitting groove 43 of the cartridge body 39 is fitted to the fitting portion 44 of the lid 41 to prevent water from entering from the joint between the cartridge body 39 and the lid 41, and to ensure watertightness.

Then, as shown in Fig. 7, generally, a pair of right and left suction ports 47 are formed in front of the cartridge body 39 of the battery case 36, specifically, in the lower portion of the front side vertical wall 36k. The upper portion of the rear portion of the cover 41 constituting the upper portion of the battery case 36, that is, at the rear portion of the upper wall 41z, is provided with an opening portion 41h, and the opening portion 41h is provided with a discharge port 48. It is a multi-blade fan (SIROCCO FAN) 49 that attracts fans.

As shown in FIG. 3 to FIG. 5, in each of the suction ports 47 of the battery case 36, a suction pipe 51 which is bent upward and extends upward is connected, and the suction pipe 51 is such that the upper end opening portion 51k is It is higher than the foot F and is open at the lower side of the connecting portion of the side frame 5 with respect to the main frame 2.

Further, at the discharge port 48 of the multi-blade fan 49, a discharge pipe 52 which is bent upward and extends upward is connected, and the discharge pipe 52 is also such that the upper end opening portion 52k is higher than the tread portion F. At the same height as the suction pipe 51. Here, the opening 51k of the suction pipe 51 is opened in the front cowl 9, and the opening 52k of the discharge pipe 52 is opened in the seat cowl 15 to open. Moreover, the opening 51k of the suction pipe 51 is formed in a circular cross section, and the opening 52k of the discharge pipe 52 is formed in a quadrangular shape.

8 and 9 show the arrangement of the element 54, the element unit 54u, and the single module 37T provided inside the battery case 36.

As shown in FIGS. 6 to 8, the battery module 37 is generally constructed by arranging three modules 37T in the vehicle front and rear direction. The physical configuration of the single module 37T is such that the element 54 is arranged in two upper and lower layers to form the element unit 54u, and the element unit 54u is separated by a gap and arranged in 15 groups in the vehicle width direction, and then borrowed. The front and rear walls 37f and 37r of the single module 37T, which will be described later, are supported by the front and rear holdings.

Here, the single module 37T includes the upper and lower walls 37u and 371 and the side wall 37s in addition to the front and rear walls 37f and 37r, and the upper and lower walls 37u and 371 are formed with slits in the front-rear direction of the vehicle. S. At the upper and lower walls 37u, 371, reinforcing ribs 63 extending in the front-rear direction of the vehicle are provided, and the slits S are formed between the reinforcing ribs 63.

Further, a cover 56 is provided before the front wall 37f. Between the electrodes D of the element 54 which arranges the electrode D toward the front side, an internal pressure relief valve 59 is provided, which is at the position of the internal pressure relief valve 59 at the front wall 37f, covering the upper and lower layers. The electrolyte guiding path 61 is horizontally disposed, and is electrically connected to the electrolyte discharge pipe 62 extending in the up and down direction. This electrolyte discharge pipe 62 is concentrated on one side in the wide direction of the vehicle. In the present embodiment, it is concentrated on the left side, and it is easy to perform maintenance.

At a corner portion of the lower wall 371, a projection 53 that abuts against the bottom wall 36t of the battery case 36 is provided. The protrusion 53 is formed at a position in contact with the corner portion 36d of the bottom wall 36t of the battery case 36 with the front and rear walls 37f, 37r and the side wall 36s (only the right side wall), specifically, It is formed at four corners of the bottom wall 36t. A gap 60 is formed between the bottom wall 36t of the cartridge body 39 and the lower wall 371 of the battery module 37 by the projection 53.

The single module 37T is disposed between the adjacent single modules 37T, and has a front wall 37f and a rear wall 37r. Therefore, a gap 58 is ensured between the single modules 37T, but The gap 58 is provided with ribs 57 extending in the vehicle width direction at the central portion in the lower direction of the front wall 37f and the rear wall 37r and the inner wall of the casing body 39.

Therefore, by this rib 57, the air system does not leak from the gap 58 to the upper side, and is equally distributed from the lower portion 60 of the cartridge body 39 of the battery case 36 to the lower wall 37l of each single module 37T. At the lower side. Then, this air flows uniformly from the slit S of the lower wall 37l of the single module 37T and along the element unit 54u. Here, the rib 57 is provided at the upper side of the suction port 47, and the sucked air is moved first toward the lower portion of the battery case 36.

Then, on one side of the wide direction of the vehicle of the single module 37T thus constructed, specifically, on the left side in the wide direction of the vehicle, the anode connection terminal 67 and the cathode connection terminal 68 are disposed. The anode cable 65, the cathode cable 66, the voltage and temperature monitoring substrate 64, the communication connector 75, and the cable guiding members 69 and 69.

Specifically, a voltage and temperature monitoring substrate 64 which is resin-molded is disposed at the upper half and the lower half of the outer side wall 37s of the single module 37T. Further, in the upper half of the side wall 37s on the left side of the single module 37T, at the upper portion of the rear portion of the voltage and temperature monitoring substrate 64, a waterproof type communication connector 75 is attached, and is disposed. There are an anode cable 65 and a cathode cable 66. Here, the anode cable 65 and the core wire 79 of the cathode cable 66 are formed by a wire.

An anode connection terminal 67 and a cathode connection terminal 68 are provided at an upper portion on the same side as the side on which the voltage and temperature monitoring substrate 64 is disposed, that is, at an upper portion of the left side wall 37s. At the anode connection terminal 67 and the cathode connection terminal 68, an anode cable 65 and a cathode cable 66 are connected. The anode cable 65 and the cathode cable 66 are held in the C-shaped cable guiding members 69 and 69 provided in the side wall 37s. Therefore, the communication connector 75 is provided between the voltage and temperature monitoring substrate 64, the anode connection terminal 67, and the cathode connection terminal 68, and the space is utilized efficiently.

Here, the element 54 is electrically connected in parallel in three directions in the vehicle width direction, and the three parallel connectors are connected in series of ten sets. In FIG. 8, the reason why the elements 54 are connected in a meandering state is because the connecting line in the wide direction of the vehicle represents a state in which three elements 54 are connected in parallel, and the connecting line in the up and down direction. , is a state in which a group of three members are connected in series.

In this way, 10 sets of connectors are formed in the upper and lower sides, and the connection line between the anode side and the cathode side is connected to the anode connection terminal 67 and the cathode connection terminal 68, and the voltage and temperature monitoring substrate 64 described above is used. For the monitoring of the 10 components, the monitoring by the single module 37T is performed.

Fig. 9 shows a state in which three sets of the single module 37T are arranged in the vehicle front and rear direction. The cathode cable 66 connected to the cathode connection terminal 68 of the single module 37T on the front side is inserted into the cable guiding member 69 held by one of the single modules 37T, and is connected to the single mode of the front side. The anode cable 65 at the anode connection terminal 67 of the group 37T is connected to the cathode connection terminal 68 of the single module 37T adjacent to the central portion, and the single module 37T on the rear side is also made. Electrical connection.

Further, each of the voltage and temperature monitoring substrates 64 is connected by a wire Harness 72 in a bent state. Here, on the right side of the upper wall 37u of the single module 37T on the rear side, an equalization unit 70 for charging and discharging management in units of a single module 37T is provided on the right side, and the wires 71 of the equalizing unit 70 are provided. The system is connected to each of the voltage and temperature monitoring substrates 64. At the equalization unit 70, a charge and discharge current measuring unit 73 that integrates a shunt substrate and a fuse for setting a current measurement reference is provided. Further, it is preferable to use a wire at the core of the wires 71 and 72.

According to the above embodiment, the anode connection terminal 67, the cathode connection terminal 68, and the electrolyte discharge pipe 62, which are electrically coupled to the single module 37T disposed in the front-rear direction of the vehicle, are collectively disposed in the vehicle. One of the wide directions (in the present embodiment, it is concentrated on the left side), and therefore, even when a large external force acts in the front and rear directions of the electric motor vehicle, the external force can be The influence of the anode connection terminal 67 and the cathode connection terminal 68 which are connected between the single module 37T in the vehicle width direction which is different from the vehicle traveling direction is minimized.

Further, since the element 54 is configured as the element unit 54u disposed at the upper and lower layers, the arrangement space in a plan view can be reduced as compared with the case where the element 54 is disposed as one layer, and for each element 54 The voltage and temperature monitoring substrate 64 that is monitored by the voltage or the like is provided on the lower side of the lower side of the side wall 37s on the left side of the single module 37T, so that the center of gravity can be lowered, and Can save configuration space.

In addition, since the core wires 65 and the core wires of the cathode cable 66 which connect the single modules 37T to each other are formed by the mesh wires, even if the relative distance between the modules is caused by vibration, Change can also make a soft correspondence for this. Therefore, it is also possible to make a soft correspondence with respect to vibration, and it is suitable for an electric motor vehicle.

Further, when the electric motor vehicle 1 is traveling, if the multi-blade fan 49 is driven, air is forcibly sucked from the opening portion 51k of the suction pipe 51 of the battery case 36 as shown by an arrow in Fig. 7 . The inhaled air is guided into the gap 60 between the bottom wall 36t of the battery case 36 and the battery module 37, and more correctly, is sucked into the bottom wall 36t of the battery case 36 and the single module 37T. In the gap 60 between the lower walls 37l.

Here, the ribs 57 are provided in the gaps 58 between the individual single modules 37T disposed in the front-rear direction and the vertical walls 36k of the battery case 36 (may also be like a sponge) In general, the air member does not flow upward from the gap 58 and the introduced air is uniformly diffused from the slit S of the lower wall 371 of the single module 37T to each of the single modules 37T. The lower portion, from the lower portion of each of the individual modules 37T, flows to the upper side at the periphery of each of the elements 54 supported by the element holding portion 55, and cools the element 54. Then, from the opening 41h of the upper wall 41z of the cover 41 of the battery case 36, the multi-blade fan 49 passes through the discharge pipe 52 and is discharged from the opening 52k. Therefore, the battery module 37 can be cooled and reliably performed.

Further, the present invention is not limited to the above embodiment, and for example, a configuration similar to that shown in Fig. 10 may be employed. In other words, it is also possible to provide a convex portion 80 at the central portion of the rear wall 37r of the single module 37T on the front side, and at the front wall 37f at the single module 37T at the central portion in the front-rear direction of the vehicle. Further, a recess 81 is provided which is rationally and electrically connected to the convex portion 80, and a convex portion 82 is provided at the wall 37r of the single module 37T at the central portion in the front-rear direction of the vehicle, and the single module 37T on the rear side is provided. At the front wall 37f, a concave portion 83 that is cropped and electrically connected to the convex portion 82 of the single module 37T at the center portion is provided, and further, a convex portion 84 is provided at the rear end portion of the voltage and temperature monitoring substrate 64 on the front side. In the center portion of the vehicle in the front-rear direction, the front end portion of the voltage and temperature monitoring substrate 64 is provided with a concave portion 85 that is crop-electrically and electrically connected to the convex portion 84, and voltage and temperature monitoring in the center portion of the vehicle front-rear direction. At the rear end portion of the substrate 64, a convex portion 86 is provided, and at the front end portion of the voltage and temperature monitoring substrate 64 at the rear side, a concave portion 87 which is cropped and electrically connected to the convex portion 86 is provided.

With such a configuration, it is possible to insert and fix the adjacent single modules 37T to each other in a crop-like manner and electrically, and to insert and fix the voltage and temperature monitoring substrates 64 to each other in crop rationality and electrical properties. Therefore, it is possible to make the single modules 37T combined with each other more reliably, and it is also possible to perform the bonding work simply. Moreover, the setting of the convex portions 80, 82, and 84 and the concave portions 81, 83, and 85 is as long as it can be cropped and electrically connected by fitting each other, and which side is used as a convex portion or a concave portion , can be freely set.

In addition, although the case where the voltage, the temperature monitoring board 64 and the like are provided on the left side of the single module 37T has been described, it may be provided on the right side.

34. . . Control device (control unit)

37. . . Battery module (module)

37T. . . Single module (module)

50. . . electric motor

54. . . element

59. . . Internal pressure relief valve

62. . . Electrolyte discharge pipe

64. . . Voltage and temperature monitoring substrate (unit)

67‧‧‧Anode connection terminal (terminal part)

68‧‧‧Cathode connection terminal (terminal part)

75‧‧‧Communication connector

81, 83, 85‧‧ ‧ recess

80, 82, 84‧‧ ‧ convex

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

Fig. 2 is a perspective view of the electric motor vehicle in a state in which the exterior member is removed in the embodiment of the present invention.

[Fig. 3] A side view of a frame around a high voltage battery.

FIG. 4 is a perspective view of FIG. 3. FIG.

Fig. 5 is a plan view of Fig. 3.

Fig. 6 is a cross-sectional view taken along line A-A of Fig. 5.

Fig. 7 is a cross-sectional view taken along line B-B of Fig. 5.

[Fig. 8] An exploded perspective view of a single module.

[Fig. 9] A perspective view of a battery module.

Fig. 10 is a schematic perspective view of another embodiment.

37‧‧‧Battery Module (Module)

37f‧‧‧ front wall

37r‧‧‧Back wall

37s‧‧‧ side wall

37T‧‧‧ single module (module)

56‧‧‧ Cover

58‧‧‧ gap

59‧‧‧Internal pressure relief valve

60‧‧‧ gap

63‧‧‧ reinforcing ribs

64‧‧‧Voltage and temperature monitoring substrate (unit)

65‧‧‧Anode cable

66‧‧‧Cathode cable

67‧‧‧Anode connection terminal (terminal part)

68‧‧‧Cathode connection terminal (terminal part)

69‧‧‧ Cable guiding member

70‧‧‧equalization unit

71‧‧‧Wire

72‧‧‧ wire

73‧‧‧Charge and discharge current measuring unit

75‧‧‧Communication connector

79‧‧‧core

Claims (6)

A battery mounting structure for an electric motor vehicle includes a battery (37) in which a single module (37T) configured by connecting elements (54) to each other is connected in plurality, and based on electric power supplied from the battery An electric motor (50) for generating a driving force of the vehicle, and a control unit (34) for controlling driving of the electric motor, wherein the electric vehicle battery mounting structure is characterized in that the plurality of modules are combined as a terminal portion (67, 68) is disposed on one side of the vehicle width direction; a connector (75) for communicating between the modules is provided for monitoring each of the aforementioned components. The voltage and temperature unit (64) is interposed between the aforementioned terminal portions (67, 68). The battery mounting structure for an electric motor vehicle according to the first aspect of the invention, wherein the plurality of elements (54) are arranged in a plurality of stages in the vertical direction, and the unit (64) is provided in a single unit. At the lower side of the module. The battery mounting structure for an electric motor vehicle according to the second aspect of the invention, wherein the unit (64) is provided on the same side of the terminal portion (67, 68) and on a lower side thereof. The battery mounting structure for an electric motor vehicle according to any one of the items 1 to 3, wherein the element (54) is provided with an internal pressure release valve (59) and is in a single mode. At the group (37T), an electrolyte discharge pipe (62) for collecting the electrolyte collected by the internal pressure release valve is disposed, and the electrolyte discharge pipe (62) is concentrated. It is placed on one side of the wide direction of the vehicle. The battery mounting structure for an electric motor vehicle according to any one of claims 1 to 3, wherein the modules are electrically connected to each other by a wire. The battery mounting structure for an electric motor vehicle according to any one of the first to third aspects of the present invention, wherein the modules are physically coupled to each other to form a convex portion (80, 82, 84) A structure in which a recess (81, 83, 85) is inserted into one of the recesses (81, 83, 85).