Electric vehicle

Abstract

To provide an electric vehicle that can achieve reduction in 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. The electric vehicle 100 is provided with an electric power converting device 19 that converts electric power stored in a battery 14 and supplies the converted electric power to the driving device 20. The electric vehicle 100 is provided with a first electric component that is an electronic instrument that is operated by electric power stored in the battery 14. The battery 14 is arranged across a front side and a rear side of a cabin, between a driver's seat 12 and a front passenger seat. 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. The electric power converting device 19 is arranged above the driving device 20. The first electric component is arranged above the electric power converting device 19.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 achieve sports car-like proportions in electric vehicles, it is desirable to lower the vehicle height in front of the driver's seat and passenger seat, and to lower the seating position inside the vehicle.

[0005] In electric vehicles, devices that use electricity stored in the battery are connected by harnesses. In order to reduce the length of the harnesses within the limited interior space, there is room for ingenuity in the layout. [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 device including a motor and a reducer that transmits rotation by the motor to a drive shaft. The electric vehicle includes a power conversion device that converts the power stored in the battery and supplies the converted power to the drive device. The electric vehicle includes a first electrical component that is an electronic device that operates using the electricity stored in the battery. In this electric vehicle, the battery contains multiple battery cells and is disposed between the driver's seat and the passenger seat, spanning the front and rear of the cabin. In this electric vehicle, 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. In this electric vehicle, the power conversion device is disposed above the drive device. In this electric vehicle, the first electrical component is disposed above the power conversion device. [Effects of the Invention]

[0007] The electric vehicle described above achieves a reduction in the length of the harness wiring while maintaining the proportions of a sports car. [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 Battery 14 and Drive Device 20> 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 Lh in Fig. 1.

[0011] As shown in Fig. 1, the electric vehicle 100 includes a battery 14. As shown in Figs. 1 and 2, the battery 14 is disposed across the front and rear of the cabin between a driver's seat 12 and a passenger seat 13. The battery 14 contains a plurality of battery cells. The battery 14 stores electricity in the battery cells.

[0012] As shown in Fig. 1, a drive unit 20 is disposed between the left and right front wheels 10. As shown in Fig. 1, in the electric vehicle 100, one drive unit 20 is 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 the 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 the front wheels 10 via a drive shaft 21.

[0013] FIG. 3 shows the configuration of the drive unit 20 provided in the electric vehicle 100. 3, the driving device 20 includes a motor 22 and a reducer 23. In the driving device 20, the motor 22 and the reducer 23 are enclosed in a housing 28.

[0014] 3, the reducer 23 includes a sun gear 24, a planetary carrier 25 that rotatably supports a plurality of pinion gears 27, and a ring gear 26. In other words, the reducer 23 includes a planetary gear mechanism.

[0015] 3, in the drive unit 20, the motor 22 is connected to the sun gear 24 of the reducer 23. In the reducer 23, a pinion gear 27 supported by a planetary carrier 25 is disposed between the sun gear 24 and the ring gear 26. The pinion gear 27 meshes with both the sun gear 24 and the ring gear 26. In the reducer 23, the ring gear 26 is fixed to a housing 28.

[0016] As shown in Fig. 3, the planetary carrier 25 is connected to the drive shaft 21. Therefore, in the drive device 20, the rotation generated by the motor 22 is transmitted in the order of the sun gear 24, the planetary carrier 25, and the drive shaft 21. At this time, due to the difference in the number of teeth of the sun gear 24, the pinion gear 27, and the ring gear 26, the rotation generated by the motor 22 is decelerated before being transmitted to the drive shaft 21. In this way, the reducer 23 decelerates the rotation of the motor 22 before transmitting it to the drive shaft 21.

[0017] The dashed line in Fig. 3 indicates the rotation axis of the rotation generated by the motor 22. As shown in Fig. 3, in the driving device 20, the reducer 23 and the drive shaft 21 are disposed on an extension of the rotation axis of the motor 22. In other words, the driving device 20 has a uniaxial structure.

[0018] 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.

[0019] <Arrangement of the power conversion device 19 and the first electrical component> As shown in FIG. 2, above the drive device 20, a power conversion device 19 is disposed. Battery 14 stores DC electricity in its battery cells. The DC electricity stored in battery 14 is supplied to power conversion device 19. Power conversion device 19 converts the DC power supplied from battery 14 into AC power. Power conversion device 19 then supplies the AC power to drive device 20.

[0020] In this way, the electricity stored in the battery 14 is converted by the power conversion device 19 and then supplied to the drive device 20. The drive device 20, which receives electricity via the power conversion device 19, 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 the electricity stored in the battery 14.

[0021] In the electric vehicle 100, a first electric component is disposed above the power conversion device 19. The first electric component is an electronic device that operates using electricity stored in the battery .

[0022] 2, the DC-DC converter 15 is disposed above the power conversion device 19. In the electric vehicle 100 of this embodiment, the first electric component is the DC-DC converter 15. The DC-DC converter 15 has a function of charging the battery 14 with electricity from an external source.

[0023] As shown in Fig. 1, the DC-DC converter 15 is connected to the charging port 17 via a charging harness 16. The two-dot chain line shown on the charging port 17 in Fig. 2 indicates the center of the charging port 17 in the height direction. As shown in Fig. 2, the center of the charging port 17 in the height direction is located between the upper and lower ends of the DC-DC converter 15. In other words, the charging port 17 is located at the same height as the DC-DC converter 15.

[0024] The charging port 17 is a connection port for supplying electricity from an external source to the DC-DC converter 15. The charging harness 16 is a harness for supplying electricity supplied from the charging port 17 to the DC-DC converter 15. Direct current electricity is supplied to the charging port 17 from an external source. For example, a plug of a charging stand for quick charging is connected to the charging port 17. The direct current electricity supplied from the plug to the charging port 17 is then supplied to the DC-DC converter 15 through the charging harness 16.

[0025] The DC-DC converter 15 boosts the voltage of the electricity supplied through the charging harness 16. Then, the DC-DC converter 15 supplies the boosted electricity to the battery 14. In this way, the DC-DC converter 15 boosts the voltage of external electricity and supplies it to the battery 14.

[0026] <Layout of the second electrical component> In the electric vehicle 100, a second electric component is disposed behind the first electric component. The second electric component is an electronic device that operates using electricity stored in the battery 14 and is separate from the first electric component.

[0027] 2, a power supply device 18 is disposed behind the DC-DC converter 15, which is the first component. In the electric vehicle 100 of this embodiment, the power supply device 18 is the second electric component.

[0028] 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. In this case, the power supply device 18 may convert the power in the battery 14 before supplying the power to each device.

[0029] Note that, like the DC-DC converter 15, the power supply device 18 may have a function of charging the battery 14 with external power. In this case, the power supply device 18 converts the externally supplied AC power into DC power. Then, the power supply device 18 supplies the DC power to the battery 14. For example, the power supply device 18 converts power supplied from a charging outlet for the electric vehicle 100 installed in a home, and then supplies the converted power to the battery 14.

[0030] In the electric vehicle 100, the power supply device 18, the first electrical component, and the second electrical component use electricity stored in the battery 14. Therefore, the power supply device 18, the first electrical component, and the second electrical component are connected to the battery 14 via harnesses. In the electric vehicle 100, the power supply device 18, the first electrical component, and the second electrical component are all located at the front of the vehicle.

[0031] <Operation of this embodiment> In the electric vehicle 100 described above, the battery 14 is disposed between the driver's seat 12 and the passenger's seat 13. This allows the seating position to be lower than when the battery 14 is mounted under the floor of the driver's seat 12 and the passenger's seat 13.

[0032] In the electric vehicle 100, devices that use the electricity stored in the battery 14 are connected by harnesses. By concentrating the devices that use the electricity stored in the battery 14 as close as possible to each other, the wiring length of the harness can be reduced. In the electric vehicle 100 described above, the power conversion device 19 and the first electric component are concentrated above the drive device 20.

[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 22 and the reducer 23 are arranged in the direction of axis extension. 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 more compact. Therefore, the space above the drive unit 20 in the electric vehicle 100 is larger than when the drive unit 20 has a double-shaft structure. In the electric vehicle 100, the power conversion device 19 and the first electric component are arranged in the space secured by the compact drive unit 20.

[0034] <Effects of this embodiment> (1) The electric vehicle 100 described above achieves a reduction in the wiring length of the harness while maintaining the proportions of a sports car.

[0035] (2) The first electrical component is a DC-DC converter 15 that boosts the voltage of external electricity and supplies it to the battery 14. (3) The electric vehicle 100 includes a charging port 17, which is a connection port for supplying electricity from an external source to the DC-DC converter 15. In the electric vehicle 100, the charging port 17 is located at the same height as the DC-DC converter 15.

[0036] The DC-DC converter 15 supplies the battery 14 with power received from an external source via a charging port 17. In the electric vehicle 100, the charging port 17 is mounted at a position that reduces the distance between the charging port 17 and the DC-DC converter 15. This allows the charging harness 16, which connects the charging port 17 and the DC-DC converter 15, to be shortened.

[0037] (4) The electric vehicle 100 is powered by electricity stored in the battery 14 and includes a second electric component that is an electronic device separate from the first electric component. In the electric vehicle 100, the second electric component is disposed behind the first electric component.

[0038] As described above, the single-shaft drive unit 20 has more compact dimensions in the vehicle longitudinal direction and vehicle vertical direction than the double-shaft drive unit 20. Therefore, the space behind the drive unit 20 in the electric vehicle 100 is larger than when the drive unit 20 has a double-shaft structure. In the electric vehicle 100 described above, the power conversion device 19, the first electric component, and the second electric component are concentrated together by arranging the second electric component in the space secured by the compact drive unit 20. This allows the electric vehicle 100 described above to further reduce the wiring length of the harness while maintaining the proportions of a sports car.

[0039] (5) In the electric vehicle 100, the second electric component is the power supply device 18 that distributes and supplies the electric power from the battery 14 to each of the connected devices. <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.

[0040] 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.

[0041] In the electric vehicle 100 described above, the charging port 17 is located at the same height as the DC-DC converter 15. However, the charging port 17 provided in the electric vehicle 100 does not have to be located at the same height as the DC-DC converter 15.

[0042] In the electric vehicle 100 described above, DC electricity is supplied from an external source to the charging port 17. However, in addition to DC electricity, AC electricity may also be supplied to the charging port 17 from a charging outlet for the electric vehicle 100 installed in a home.

[0043] In the electric vehicle 100 described above, the charging port 17 is disposed on the Lh side in Fig. 1. In the electric vehicle 100, the charging port 17 may be disposed on the Rh side in Fig. 1.

[0044] The electric vehicle 100 described above includes a second electric component in addition to the first electric component. The electric vehicle 100 does not necessarily have to include the second electric component. In the electric vehicle 100 described above, the second electric component is disposed behind the first electric component. The position of the second electric component in the electric vehicle 100 is not limited to that described in the above embodiment. For example, the second electric component may be disposed in front of the first electric component.

[0045] In the electric vehicle 100 described above, the second electric component is a different type of electronic device from the first electric component. On the other hand, in the electric vehicle 100, the second electric component may be the same type of electronic device as the first electric component.

[0046] In the electric vehicle 100 described above, the first electric component is the DC-DC converter 15. In the electric vehicle 100, the first electric component does not have to be the DC-DC converter 15.

[0047] In the above embodiment, the second electric component is the power supply device 18. In the electric vehicle 100, the second electric component does not have to be the power supply device 18. In the electric vehicle 100 described above, the first electrical component is the DC-DC converter 15, and the second electrical component is the power supply device 18. On the other hand, in the electric vehicle 100, the first electrical component may be the power supply device 18, and the second electrical component may be the DC-DC converter 15. In other words, in the electric vehicle 100, the positions of the DC-DC converter 15 and the power supply device 18 may be reversed.

[0048] The electric vehicle 100 described above includes two drive units 20: one connected to the right front wheel and the other connected to the left front wheel. The configuration of the drive units 20 included in the electric vehicle 100 is not limited to the above embodiment.

[0049] 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.

[0050] 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 22 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.

[0051] 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 22 and the reducer 23. [Explanation of symbols]

[0052] 10...Front wheel 11...Rear wheel 12...Driver's seat 13…Passenger seat 14...Battery 15...DC-DC converter 16...Charging harness 17…Charging port 18…Power supply device 19...Power conversion device 20...Driver 21...Drive shaft 22...Motor 23...Reducer 24...Sun Gear 25...Planetary carrier 26…Ring gear 27...Pinion gear 28…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 conversion device that converts the power stored in the battery and supplies the converted power to the drive device; a first electrical component that is an electronic device that operates using the electricity stored in the battery; The battery contains a plurality of battery cells and is disposed between the driver's seat and the passenger seat across the front and rear of the cabin, 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 power conversion device is disposed above the drive device, The first electric component is disposed above the power converter. Electric car.

2. The first electrical component is a DC-DC converter that boosts the electricity from the outside and supplies it to the battery. The electric vehicle of claim 1 .

3. a charging port which is a connection port for supplying the electricity from the outside to the DC-DC converter; The charging port is disposed at the same height as the DC-DC converter. The electric vehicle according to claim 2 .

4. a second electric component that is an electronic device separate from the first electric component and that operates using the electricity stored in the battery; The second electrical component is disposed behind the first electrical component. The electric vehicle according to any one of claims 1 to 3.

5. The second electric component is a power supply device that distributes and supplies the power from the battery to each connected device. The electric vehicle according to claim 4.

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