Electric vehicle

Abstract

To provide an electric vehicle that can achieve securement of a capacity of a battery and reduction in an arrangement length of a harness, while maintaining a proportion like a sports car.SOLUTION: An electric vehicle 100 is provided with a driving device 20 that is provided with a motor and a speed reducer that transmits rotation by the motor to a drive shaft. Further, the electric vehicle 100 is provided with an electricity supply device 18. A battery 14 of the electric vehicle 100 comprises an intermediate part 15 and a front part 16, arranged in front of the intermediate part 15, on which a plurality of battery cells are bedded. In the electric vehicle 100, the driving device 20 has a uniaxial structure in which the speed reducer and the drive shaft are arranged on an extension line of a rotary shaft of the motor, which is arranged between left and right front wheels 10. In the electric vehicle 100, the front part 16 is arranged behind the driving device 20. In the electric vehicle 100, the electricity supply device 18 is arranged above the front part 16.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to electric vehicles. [Background technology]

[0002] Patent Document 1 discloses an electric vehicle in which a battery is disposed between the driver's seat and the passenger seat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-520139 Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for sports car-type electric vehicles. In order to realize sports car-like proportions in electric vehicles, it is desirable to lower the vehicle height in the area in front of the driver's seat and passenger seat.

[0005] To extend the driving range of an electric vehicle, the battery capacity must be increased. Furthermore, the various devices in an electric vehicle are connected by harnesses. Given the limited interior space, there is room for ingenuity in the layout to ensure both battery capacity and the reduction of harness wiring length. [Means for solving the problem]

[0006] An electric vehicle that solves the above problems drives drive wheels using electricity stored in a battery. The electric vehicle includes a drive unit including a motor and a reducer that transmits rotation by the motor to a drive shaft. The electric vehicle also includes a power supply unit that converts external power and supplies it to the battery, and distributes the power from the battery to connected devices. In the electric vehicle, the battery includes a middle section that houses multiple battery cells and is arranged between the driver's seat and the passenger seat, spanning the front and rear of the cabin. In the electric vehicle, the battery includes a front section that is arranged forward of the middle section and in which the multiple battery cells are arranged. In the electric vehicle, the drive unit has a uniaxial structure in which the reducer and the drive shaft are arranged on an extension of the rotation shaft of the motor, and is arranged between the left and right front wheels. In the electric vehicle, the front section is arranged rearward of the drive unit. In the electric vehicle, the power supply unit is arranged above the front section. [Effects of the Invention]

[0007] The electric vehicle described above maintains the proportions of a sports car while ensuring battery capacity and reducing the length of the harness wiring. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing the arrangement of a battery and its peripheral devices when viewed from above an electric vehicle according to an embodiment. [Figure 2] FIG. 2 is a schematic diagram showing the arrangement of the battery and its peripheral devices when the electric vehicle according to the embodiment is viewed from the side. [Figure 3] FIG. 3 is a schematic diagram showing a drive unit provided in the electric vehicle according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of an electric vehicle will be described below with reference to FIGS. Note that directions are indicated by arrows in Fig. 1 and Fig. 2. In Fig. 1 and Fig. 2, Fr indicates the forward direction of the electric vehicle 100. In Fig. 1 and Fig. 2, Rr indicates the rearward direction of the electric vehicle 100. In Fig. 1, Rh indicates the right side as seen by a passenger facing forward in the electric vehicle 100. In Fig. 1, Lh indicates the left side as seen by a passenger facing forward in the electric vehicle 100.

[0010] <Arrangement of the battery 14 and electronic control device 23 included in the electric vehicle 100> Fig. 1 shows the arrangement of the battery 14 and its peripheral devices when the electric vehicle 100 is viewed from above. Fig. 2 shows the arrangement of the battery 14 and its peripheral devices when the electric vehicle 100 is viewed from the direction of Rh in Fig. 1.

[0011] 1, the electric vehicle 100 includes a battery 14. The battery 14 contains a plurality of battery cells. The battery 14 stores electricity in the battery cells.

[0012] The battery 14 includes a middle section 15 and a front section 16 . 1 and 2, the intermediate section 15 is disposed across the front and rear of the cabin between the driver's seat 12 and the passenger seat 13. The intermediate section 15 houses a plurality of battery cells.

[0013] 1, the front section 16 is disposed in front of the intermediate section 15. A plurality of battery cells are arranged in the front section 16. 2, an electronic control unit 23 is disposed above the front part 16. The electronic control unit 23 controls the electricity stored in the battery 14. For example, the electronic control unit 23 controls the current according to a current sensor provided in the battery 14. For example, the electronic control unit 23 controls the cooling, warming, and charging / discharging of the battery 14 according to a temperature sensor provided in the battery 14.

[0014] <Arrangement of the power supply device 18 and the charging port 17 provided in the electric vehicle 100> 1 and 2, a power supply device 18 is disposed above the front section 16. The power supply device 18, like the electronic control device 23, is disposed in the space above the front section 16.

[0015] 2, the power supply device 18 is disposed above the electronic control device 23. Therefore, the electronic control device 23 is disposed above the front part 16 and below the power supply device 18.

[0016] A plurality of devices are connected to the power supply device 18 via harnesses. For example, lights provided in the electric vehicle 100, a monitor for a car navigation system, and the like are connected to the power supply device 18. The power supply device 18 distributes and supplies power from the battery 14 to each of the connected devices. At this time, the power supply device 18 may convert the power in the battery 14 before supplying the power to each device.

[0017] The power supply device 18 also has the function of charging the battery 14 with external power. As shown in FIG. 1, the power supply device 18 is connected to the charging port 17 via a charging harness 22 .

[0018] In Fig. 2, the two-dot chain line shown on front wheel 10 indicates the position of the center of front wheel 10 in the longitudinal direction of the vehicle. As shown in Fig. 2, charging port 17 is located rearward of the two-dot chain line in Fig. 2. In other words, charging port 17 is located behind the right front wheel of front wheels 10. Also, as shown in Fig. 2, charging port 17 is located at a position that overlaps with power supply device 18 in the height direction.

[0019] Charging port 17 is a connection port for supplying external power to power supply device 18. Charging harness 22 supplies the power received from charging port 17 to power supply device 18. External alternating current electricity is supplied to charging port 17. For example, a charging outlet for electric vehicle 100 installed in the home is connected to charging port 17. The alternating current electricity supplied to charging port 17 from the charging outlet is then supplied to power supply device 18 via charging harness 22.

[0020] Power supply device 18 converts AC electricity supplied through charging harness 22 into DC electricity, and supplies the DC electricity to battery 14. In this way, power supply device 18 converts external power and supplies it to battery 14.

[0021] <Layout and configuration of the drive unit 20 provided in the electric vehicle 100> 1 and 2, a drive unit 20 is disposed in front of the battery 14. A front portion 16 of the battery 14 is disposed behind the drive unit 20. As shown in FIG. 1, the drive unit 20 is disposed between the left and right front wheels 10.

[0022] As shown in Fig. 1, electric vehicle 100 has one drive unit 20 disposed on each of the Rh side and Lh side in Fig. 1. In Fig. 1, the drive unit 20 disposed on the Rh side is connected to the right front wheel of front wheels 10 via a drive shaft 21. In Fig. 1, the drive unit 20 disposed on the Lh side is connected to the left front wheel of front wheels 10 via a drive shaft 21.

[0023] FIG. 3 shows the configuration of the drive unit 20 provided in the electric vehicle 100. As shown in FIG. 3, the driving device 20 includes a motor 24 and a reducer 25. In the driving device 20, the motor 24 and the reducer 25 are enclosed in a housing 30.

[0024] 3, the reducer 25 includes a sun gear 26, a planetary carrier 27 that rotatably supports a plurality of pinion gears 29, and a ring gear 28. In other words, the reducer 25 includes a planetary gear mechanism.

[0025] 3, in the drive unit 20, the motor 24 is connected to a sun gear 26 of a reducer 25. In the reducer 25, a pinion gear 29 supported by a planetary carrier 27 is disposed between the sun gear 26 and a ring gear 28. The pinion gear 29 meshes with both the sun gear 26 and the ring gear 28. In the reducer 25, the ring gear 28 is fixed to a housing 30.

[0026] As shown in Fig. 3, the planetary carrier 27 is connected to the drive shaft 21. Therefore, in the drive device 20, the rotation generated by the motor 24 is transmitted in the order of the sun gear 26, the planetary carrier 27, and the drive shaft 21. At this time, due to the difference in the number of teeth of the sun gear 26, the pinion gear 29, and the ring gear 28, the rotation generated by the motor 24 is decelerated before being transmitted to the drive shaft 21. In this way, the reducer 25 decelerates the rotation of the motor 24 before transmitting it to the drive shaft 21.

[0027] The dashed line in Fig. 3 indicates the rotation axis of the rotation generated by the motor 24. As shown in Fig. 3, in the driving device 20, the reducer 25 and the drive shaft 21 are disposed on an extension of the rotation axis of the motor 24. In other words, the driving device 20 has a uniaxial structure.

[0028] As described above, the drive unit 20 is disposed on both the Rh side and the Lh side in Fig. 1. In Fig. 1, the drive unit 20 disposed on the Rh side rotates the right front wheel through the drive shaft 21. In Fig. 1, the drive unit 20 disposed on the Lh side rotates the left front wheel through the drive shaft 21. Thus, in the electric vehicle 100, the front wheels 10 are drive wheels.

[0029] <Arrangement of the power control unit 19 provided in the electric vehicle 100> 1 and 2, a power control unit 19 is disposed above the drive device 20 and in front of the power supply device 18. The power control unit 19 controls the power supplied from the battery 14 to the drive device 20.

[0030] Battery 14 stores electricity converted into direct current by power supply device 18. DC power is supplied from battery 14 to power control unit 19. Power control unit 19 converts the DC power supplied from battery 14 into alternating current. Power control unit 19 then supplies the converted power to drive device 20.

[0031] The drive unit 20 supplied with power rotates the front wheels 10 via the drive shaft 21. In this way, the electric vehicle 100 drives the front wheels 10, which are the drive wheels, using electricity stored in the battery 14.

[0032] <Operation of this embodiment> The electric vehicle 100 increases the capacity of the battery 14 by arranging the battery 14 not only in the intermediate section 15 between the driver's seat 12 and the passenger seat 13, but also in the front section 16 in front of the driver's seat 12 and the passenger seat 13.

[0033] The drive unit 20 in the electric vehicle 100 has a single-shaft structure, not a double-shaft structure. In the single-shaft structure drive unit 20, the motor 24 and the reducer 25 are aligned in the direction of extension of the rotation axis. Therefore, although the single-shaft structure drive unit 20 has a larger dimension in the vehicle width direction than the double-shaft structure drive unit 20, the dimensions in the vehicle front-rear direction and the vehicle up-down direction are compact. As a result, the space above the front part 16 of the electric vehicle 100 is larger than when the drive unit 20 has a double-shaft structure. In the electric vehicle 100, the power supply unit 18 is arranged in the space secured by the compact drive unit 20. As a result, the electric vehicle 100 achieves the proportions of a sports car while securing the capacity of the battery 14.

[0034] The power supply device 18 is connected to devices at the front of the vehicle, such as the monitor of a car navigation system. Therefore, by arranging the power supply device 18 in front of the driver's seat 12 and the passenger seat 13, the electric vehicle 100 can reduce the wiring length of the harness compared to when the power supply device 18 is arranged behind the driver's seat 12 and the passenger seat 13.

[0035] <Effects of this embodiment> (1) The electric vehicle 100 described above maintains the proportions of a sports car while ensuring the capacity of the battery 14 and reducing the wiring length of the harness.

[0036] (2) Electric vehicle 100 includes charging port 17, which is a connection port for supplying electric power from an external source to power supply device 18. Charging port 17 is located behind front wheel 10 and at a position overlapping with power supply device 18 in the height direction.

[0037] Power supply device 18 supplies battery 14 with electric power received from an external source via charging port 17. In electric vehicle 100, the distance between charging port 17 and power supply device 18 is reduced by devising an installation position for charging port 17. This allows electric vehicle 100 to shorten charging harness 22, which is a harness connecting charging port 17 and power supply device 18.

[0038] (3) The electric vehicle 100 includes a power control unit 19 that controls the power supplied from the battery 14 to the drive device 20. The power control unit 19 is disposed above the drive device 20 and in front of the power supply device 18.

[0039] Power control unit 19 is disposed above drive unit 20 and in front of power supply device 18. Therefore, power supply device 18 in electric vehicle 100 is located behind front wheels 10. Because charging port 17 is disposed behind front wheels 10, the distance between power supply device 18 and charging port 17 is short. This allows electric vehicle 100 to shorten charging harness 22, which is a harness connecting charging port 17 and power supply device 18.

[0040] (4) The electric vehicle 100 includes an electronic control device 23 that controls the electricity stored in the battery 14. The electronic control device 23 is disposed above the front part 16. In the electric vehicle 100 described above, the electronic control device 23 is arranged in addition to the power supply device 18 in the space secured by the compact drive device 20. This allows the electric vehicle 100 to maintain the proportions of a sports car while arranging the electronic control device 23 in front of the driver's seat 12 and passenger seat 13.

[0041] (5) The electric vehicle 100 includes a charging port 17, which is a connection port for supplying electric power from an external source to the power supply device 18. The charging port 17 is located behind the front wheels 10 and at a position overlapping the power supply device 18 in the height direction. The electronic control device 23 is located above the front part 16 and below the power supply device 18.

[0042] In a sports car-type electric vehicle 100 with a low vehicle height, it is easier for the user of the electric vehicle 100 to supply power if the charging port 17 is located as high as possible. The charging port 17 is located at a position that overlaps with the power supply device 18 in the height direction. In the electric vehicle 100, the electronic control device 23 is located below the power supply device 18, and therefore the power supply device 18 is located at a higher position. This allows the electric vehicle 100 to have a layout that makes it easier for the user to supply power.

[0043] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0044] As shown in Fig. 1, the electric vehicle 100 has the driver's seat 12 located on the Lh side of Fig. 1 and the passenger seat 13 located on the Rh side of Fig. 1. The positions of the driver's seat 12 and the passenger seat 13 may be reversed. In the electric vehicle 100 described above, the front wheels 10 are drive wheels. The electric vehicle 100 may be a four-wheel drive vehicle in which the rear wheels 11 are also driven in addition to the front wheels 10.

[0045] In the electric vehicle 100 described above, the charging port 17 is disposed behind the front wheels 10 and at a position that overlaps with the power supply device 18 in the height direction. The position of the charging port 17 provided on the electric vehicle 100 is not limited to that described in the above embodiment. That is, the charging port 17 may be disposed in front of the front wheels. Furthermore, the charging port 17 may be disposed at a position that does not overlap with the power supply device 18 in the height direction.

[0046] In the electric vehicle 100 described above, AC electricity is supplied from an external source to the charging port 17. However, in addition to AC electricity, DC electricity supplied from a charging station for rapid charging or the like may also be supplied to the charging port 17.

[0047] In the electric vehicle 100 described above, the charging port 17 is disposed on the Rh side in Fig. 1. In the electric vehicle 100, the charging port 17 may be disposed on the Lh side in Fig. 1.

[0048] In the electric vehicle 100 described above, the power control unit 19 is disposed above the drive unit 20 and in front of the power supply unit 18. The position of the power control unit 19 provided in the electric vehicle 100 is not limited to that described in the above embodiment. For example, the power control unit 19 may be disposed below the drive unit 20. Alternatively, for example, the power control unit 19 may be disposed behind the power supply unit 18.

[0049] In the electric vehicle 100 described above, the electronic control device 23 is disposed above the front part 16 and below the power supply device 18. The position of the electronic control device 23 provided in the electric vehicle 100 is not limited to that described in the above embodiment. For example, the electronic control device 23 may be disposed below the front part 16. Furthermore, for example, the electronic control device 23 may be disposed above the power supply device 18.

[0050] The electric vehicle 100 described above includes two drive units 20: a drive unit 20 connected to the right front wheel and a drive unit 20 connected to the left front wheel. The form of the drive units 20 included in the electric vehicle 100 is not limited to the above embodiment.

[0051] For example, the electric vehicle 100 may have a drive unit 20 connected to both the right front wheel and the left front wheel, rather than having two drive units 20. Hereinafter, an electric vehicle 100 employing such a configuration will be referred to as an electric vehicle 100 of a first modified example.

[0052] For example, in the electric vehicle 100, one drive shaft 21 may be disposed so as to pass through the rotation axes of the motors 24 provided in the two drive units 20 on the left and right. Hereinafter, the electric vehicle 100 employing this configuration will be referred to as the electric vehicle 100 of the second modified example.

[0053] The configuration of the drive unit 20 provided in the electric vehicle 100 is not limited to the form shown in Fig. 3. For example, the drive unit 20 provided in the electric vehicles 100 of the first and second modified examples may include a differential gear in addition to the motor 24 and the reducer 25.

[0054] As shown in FIG. 2 , in the electric vehicle 100 described above, the upper end of the front section 16 is located lower than the upper end of the intermediate section 15. The configuration of the front section 16 provided in the electric vehicle 100 is not limited to the above embodiment. For example, the upper end of the front section 16 may be located at the same height as the upper end of the intermediate section 15. Furthermore, for example, the upper end of the front section 16 may be located higher than the upper end of the intermediate section 15. [Explanation of symbols]

[0055] 10...Front wheel 11...Rear wheel 12...Driver's seat 13…Passenger seat 14...Battery 15...Middle section 16...Front section 17…Charging port 18…Power supply device 19...Power control unit 20...Driver 21...Drive shaft 22...Charging harness 23...Electronic control device 24...Motor 25...Reducer 26...Sun Gear 27...Planetary carrier 28…Ring gear 29...Pinion gear 30…Housing 100...electric vehicle

Claims

1. It is an electric vehicle whose drive wheels are driven by electricity stored in a battery. a drive device including a motor and a reducer that transmits rotation by the motor to a drive shaft; a power supply device that converts external power and supplies the converted power to the battery, and distributes and supplies the power from the battery to each connected device; The battery an intermediate section that houses a plurality of battery cells and is disposed across the front and rear of the cabin between the driver's seat and the passenger seat; a front portion disposed in front of the intermediate portion and including a plurality of the battery cells therein; the drive device has a uniaxial structure in which the reducer and the drive shaft are disposed on an extension of the rotation shaft of the motor, and is disposed between the left and right front wheels; the front portion is disposed behind the drive unit, The power supply device is disposed above the front portion. Electric car.

2. a charging port that is a connection port for supplying the power from the outside to the power supply device; The charging port is disposed behind the front wheel and at a position overlapping with the power supply device in the height direction. The electric vehicle of claim 1 .

3. a power control unit that controls the power supplied from the battery to the drive device; The power control unit is disposed above the drive unit and in front of the power supply unit. The electric vehicle according to claim 2 .

4. an electronic control device that controls the electricity stored in the battery; The electronic control unit is disposed above the front portion. The electric vehicle according to any one of claims 1 to 3.

5. a charging port that is a connection port for supplying the power from the outside to the power supply device; the charging port is disposed behind the front wheel and at a position overlapping with the power supply device in a height direction; The electronic control device is disposed above the front portion and below the power supply device. The electric vehicle according to claim 4.

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