Saddle-type electric vehicle

Abstract

To provide a saddle-riding type electric vehicle that is prevented from unintentionally moving when the vehicle restarts from stopping at an inclined road surface.SOLUTION: A saddle-riding type electric vehicle includes: an electric motor for making a vehicle travel; a control device for controlling power supply to the electric motor; brake operators (brake levers 2cL, 2cR) operated by an occupant to actuate the brake device. When the brake levers 2cL, 2cR are operated to equal to or more than a prescribed threshold (second lever position P2) or when all of the plurality of brake levers 2cL, 2cR are operated, the control device causes the electric motor to be three-phase short-circuited.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a saddle-ride type electric vehicle. [Background technology]

[0002] Conventionally, in a scooter-type saddle-ride electric vehicle whose prime mover is an electric motor, a configuration has been known as an erroneous start prevention device that prevents the vehicle from starting even if the accelerator is operated unless the brake is applied (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-328970 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, one of the electric motor control methods has been to prevent the electric motor from running (cutting off the power supply to the electric motor) when the brake is applied, even if the accelerator is released. In this configuration, after a saddle-type electric vehicle has been stopped by braking, the electric motor cannot be driven until the brake is released in order to restart. Therefore, when restarting after stopping on a road with an uphill gradient, if the accelerator pedal operation is delayed after releasing the brake, the saddle-type electric vehicle may roll back (slide down) due to the gradient of the road, and a means to prevent this from happening is required.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to prevent unintended movement of a saddle-type electric vehicle when restarting the vehicle from a stop on a sloped road surface. [Means for solving the problem]

[0006] As a means for solving the above problems, a first aspect of the present invention is a saddle-ride type electric vehicle (1) including an electric motor (20) for propelling the vehicle, a control device (25) for controlling the supply of power to the electric motor (20), and a brake operator (2c) operated by a passenger to activate a brake device, wherein the control device (25) short-circuits the electric motor (20) in three phases when the brake operator is operated to a specified threshold value or more. With this configuration, when the brake operator is operated to a specified threshold or more, three-phase short-circuit control of the electric motor is performed, and in addition to the activation of the brake device by the brake operation, motor braking by the electric motor is generated, making it possible to easily and reliably stop the vehicle. As a result, even when restarting from a stop on a sloped road, movement of the vehicle due to the slope of the road surface can be prevented, allowing for a smooth and quick start. A three-phase short circuit is when all three phases U, V, and W of a three-phase AC motor are short-circuited (i.e., the Lo side of the switches that control the U, V, and W phases of the inverter are all turned on), creating a three-phase short circuit state, making it difficult for current to flow through the electric motor and making it difficult for the electric motor to rotate.

[0007] In a second aspect of the present invention, in a saddle-ride type electric vehicle (1) including an electric motor (20) for propelling the vehicle, a control device (25) for controlling the supply of power to the electric motor (20), and a plurality of brake operators (2cL, 2cR) operated by a passenger to activate a brake device, the control device (25) short-circuits the electric motor (20) in three phases when the plurality of brake operators (2cL, 2cR) are operated together. With this configuration, when multiple brake operators are operated simultaneously, the three-phase short-circuit control of the electric motor is performed, and in addition to the brake device activation caused by the brake operation, motor braking is generated by the electric motor, making it possible to easily and reliably stop the vehicle. This prevents the vehicle from moving due to the gradient of the road surface when restarting from a stop on a sloped road, allowing for a smooth and quick start.

[0008] In a third aspect of the present invention, in the first or second aspect, an accelerator operator (2aR) is provided which is operated by a passenger to drive the electric motor (20), and the control device (25) short-circuits the electric motor (20) three-phase and then releases the three-phase short-circuit when the accelerator operator (2aR) is opened. According to this configuration, by releasing the three-phase short circuit control of the electric motor in response to accelerator operation, the stopped state caused by the three-phase short circuit can be easily released by operation during normal driving, allowing for smooth and quick starting. [Effects of the Invention]

[0009] According to the present invention, in a saddle-type electric vehicle, when restarting the vehicle from a stop on a sloped road surface, unintended movement of the vehicle can be prevented. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a left side view of a saddle-ride type electric vehicle according to an embodiment of the present invention. [Figure 2] FIG. 4 is a side view showing the saddle type electric vehicle stopped on an uphill road surface. [Figure 3] 3 is an explanatory diagram showing an outline of operation of left and right brake operation elements of the saddle-ride type electric vehicle. FIG. [Figure 4] 3 is an explanatory diagram showing a plurality of operating positions of the brake operator. FIG. [Figure 5] FIG. 2 is a configuration diagram showing a configuration of a main part of the saddle-ride type electric vehicle. [Figure 6] 5 is a flowchart showing a first example of a process until the saddle type electric vehicle performs three-phase short circuit control. [Figure 7] 10 is a flowchart showing a second example of a process until the saddle type electric vehicle performs three-phase short circuit control. [Figure 8] 6 is a flowchart showing an example of a process performed by the saddle type electric vehicle until three-phase short circuit control is released. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, directions such as front, rear, left, and right are the same as directions in the vehicle described below unless otherwise specified. In addition, in the drawings used in the following description, an arrow FR indicating the front of the vehicle, an arrow LH indicating the left side of the vehicle, an arrow UP indicating the top of the vehicle, and a line CL indicating the center of the left and right sides of the vehicle body are shown in appropriate positions.

[0012] <Entire vehicle> 1 and 2 show a scooter-type electric two-wheeled vehicle (motorcycle) 1, as an example of a saddle-ride type electric vehicle, which has a floor section (low floor section) 9 on which a rider (driver) R places his / her feet. The electric two-wheeled vehicle 1 has a front wheel 3 which is a steering wheel and a rear wheel 4 which is a drive wheel. The front wheel 3 can be steered by a bar handle (steering handle) 2.

[0013] Referring also to FIG. 3, the bar handle 2 is provided on both the left and right sides with a pair of left and right grip portions 2a that the rider R grips with the left and right hands, respectively. The periphery of the bar handle 2 is covered with a handle cover 2b, excluding the left and right grip portions 2a. In front of the left and right grips 2a, a pair of left and right brake levers 2cL, 2cR are arranged that the rider R operates by gripping with the hands gripping the left and right grip portions 2a. In the embodiment, the left and right brake levers 2cL, 2cR may be collectively referred to as brake levers 2c.

[0014] The left and right brake levers 2c are operated so that they swing rearward (toward the grip 2a) from the base end (inner side in the vehicle width direction) by being gripped with the hands holding the left and right grip portions 2a. This gripping operation activates the brake devices 3a, 4a provided individually for the front and rear wheels 3, 4, which brake the rotation of the front and rear wheels 3, 4 and thereby the forward and backward movement of the electric motorcycle 1. An accelerator grip (accelerator operator) 2aR is attached to the right grip portion 2a so that the rider R can open and close the accelerator.

[0015] The rear wheel 4 is driven by, for example, an electric motor (electric motor) 20 serving as an in-wheel motor. The electric motor 20 generates driving force for propelling the electric motorcycle 1. The electric motorcycle 1 includes a floor section 9 on which a rider seated on a seat 8 places his / her feet, a front body FB connected to the front of the floor section 9, and a rear body RB connected to the rear of the floor section 9. A straddling space K1 is formed above the floor section 9 to make it easier for a rider R to straddle the vehicle body. For example, a battery 21 that stores power to be supplied to the electric motor 20 is housed inside the rear body RB below the seat 8. For example, a control unit (PCU) 22 that controls the power of the battery 21 and supplies it to the electric motor 20 is housed inside the floor portion 9.

[0016] 5, battery cables 23 extend from the positive and negative terminals of battery 21. Each battery cable 23 is connected to PCU 22. A three-phase cable 24 extends from PCU 22 and is connected to electric motor 20, which is a three-phase AC motor. The PCU 22 is equipped with an inverter that converts the direct current supplied by the battery 21 into three-phase alternating current and supplies it to the electric motor 20. The electric motor 20 performs power running operation under the control of the PCU 22, causing the electric motorcycle 1 to travel. The electric motor 20 performs regenerative braking when the electric motorcycle 1 decelerates, and recovers the kinetic energy of the vehicle body as electrical energy and stores it in the battery 21.

[0017] For example, the inside of the front body FB houses an ECU 25, which serves as a vehicle control device that controls all the functions of the electrical components of the electric motorcycle 1, and an inclination sensor (for example, an acceleration sensor 26 such as an IMU (Inertial Measurement Unit)) that detects the tilt angle of the vehicle body in the front, rear, left and right directions. The acceleration sensor 26 is connected to the ECU 25 so as to be able to communicate information, and is also connected to a vehicle speed sensor 27 that detects the vehicle speed of the electric motorcycle 1, a brake sensor 28 that detects brake operation on the electric motorcycle 1, and an accelerator sensor 29 that detects accelerator operation on the electric motorcycle 1 so as to be able to communicate information.

[0018] For example, the right brake lever 2cR is used to brake the front wheel (for operating the front brake), and the left brake lever 2cL is used to brake the rear wheel (for operating the rear brake). The functions of the left and right brake levers 2c are not limited to those described above, and for example, the front and rear brakes may be linked at a specified ratio by operating only one of the left and right brake levers 2c. The front and rear brake devices 3a, 4a can be operated individually and independently depending on the operation and control.

[0019] The electric two-wheeled vehicle 1 may be configured with a brake pedal (brake operator) that is operated by the rider R with his / her foot placed on a step. In this case, for example, one of the left and right brake levers 2c (e.g., the right brake lever 2cR) and one of the left and right brake pedals (e.g., the right brake pedal) are combined. The electric two-wheeled vehicle 1 is not limited to a scooter-type vehicle having a floor portion 9, but may also be a vehicle with a body that has a knee-grip portion that is held between the rider R's knees.

[0020] When the brakes are applied, the electric motorcycle 1 is controlled so that power is not supplied to the electric motor 20 (i.e., the vehicle does not move) even if the accelerator is operated. In other words, the electric motorcycle 1 is controlled so that power is not supplied to the electric motor 20 when the brakes are applied even while the accelerator is being operated. Referring to Figure 2, when the electric motorcycle 1 is stopped by braking on a road surface G with a gradient (inclination angle θ), such as an uphill slope, and then the brake is released (disengaged) to restart, the accelerator is operated after the brake is released. For this reason, depending on the gradient of the road surface G, there is a risk that the electric motorcycle 1 may unintentionally move backward (or forward if the road is downhill). In order to restrict this forward and backward movement, in this embodiment, when the electric motorcycle 1 is stopped and specified conditions are met, a three-phase short circuit state is established for the electric motor 20, and control is performed to prevent the electric motorcycle 1 from rolling downhill, etc.

[0021] The conditions for performing the three-phase short circuit control described above are that the electric motorcycle 1 is stopped by braking on a road surface G with a gradient of a predetermined angle or more, and that the predetermined braking operation is performed. The inclination angle θ of the road surface G is detected, for example, by an acceleration sensor 26 provided in the electric motorcycle 1. That is, the inclination angle of the vehicle body is detected by the acceleration sensor 26, and this inclination angle is recognized as the inclination angle θ of the road surface G. The acceleration sensor 26 is, for example, an IMU, but is not limited to this and may be any of various sensors that detect the inclination angle of the vehicle body. The fact that the vehicle is stopped is detected from detection information of a vehicle speed sensor 27, such as wheel speed sensors provided on the front and rear wheels 3, 4.

[0022] The predetermined brake operation for implementing three-phase short-circuit control means that each of the left and right brake levers 2c is braked, and at least one of the brake levers 2c is braked by a predetermined operation amount (and therefore, an operating force) or more. The brake operation of the left and right brake levers 2c is detected, for example, by the on / off state of a pair of left and right brake switches 2dl, 2dR provided on each of the left and right brake levers 2c. In the embodiment, the left and right brake switches 2dl, 2dR may be collectively referred to as the brake switch 2d. Each brake switch 2d functions, for example, as a brake lamp light switch, and switches on and off with a relatively light brake operating force (and therefore, a light braking force).

[0023] With reference to FIG. 4, the lever position at which the brake switch 2d of the left or right brake lever 2c (the left brake lever 2cL is shown in FIG. 4) is turned on (the brake device is activated) is indicated by symbol P1 in the drawing. Symbol P0 in the drawing indicates the initial position of the left or right brake lever 2c before operation. The brake switch 2d functions as a brake operation sensor that detects that a brake operation has been performed on the brake lever 2c. The left and right brake operation sensors are included in the brake sensor 28.

[0024] Whether the brake operation is performed with a predetermined operation amount (and therefore, operation force) or more can be detected, for example, from the swing angle of the brake lever 2c, the operation amount of an operation force transmission member such as an operation cable, or the load applied to these members. That is, the brake operation amount (and therefore, brake operation force) is detected from the operation amount and load, and if this detected value is equal to or greater than a threshold, it is determined that the brake operation is performed with a predetermined amount or more. For example, in the case of a hydraulic brake, it may be determined that the brake operation is performed with a predetermined amount or more from the hydraulic pressure generated by a master cylinder or the like.

[0025] When the detection value of each sensor related to the brake operation amount (or operation force) reaches a threshold value, the brake lever 2c reaches a second lever position P2, which is gripped even more deeply (strongly) than lever position P1 in the figure. Each sensor related to the brake operation amount (or operation force) functions as a brake operation amount sensor that detects that the brake lever 2c has been braked to a predetermined degree or greater. Each sensor related to the brake operation amount (or operation force) is also included in the brake sensor 28.

[0026] After a predetermined brake operation is performed and three-phase short circuit control is performed, even if the brake operation is released, the three-phase short circuit control is maintained until the accelerator is operated or until a predetermined time has passed. As a result, when the vehicle is stopped on a road surface G with a gradient (inclination angle θ), the stopped state is maintained even if the brake operation is released, and unintended forward or backward movement of the electric motorcycle 1 is prevented. The motor brake caused by the three-phase short circuit can be released, for example, by the occupant R releasing the brake lever 2c and opening the accelerator pedal. This allows the vehicle to be easily and reliably restarted from a stop on a slope. In the embodiment, the implementation of the three-phase short-circuit control is determined when the brake operation amount (or operation force) is equal to or greater than a threshold value, but this configuration is not limited to this. For example, the implementation of the three-phase short-circuit control may be determined when the left and right brake levers 2c are operated simultaneously (two brake operations). In this case, the condition may be that both of the two brake operations are performed with an operation force equal to or greater than a threshold value, or that only one of the two brake operations is performed with an operation force equal to or greater than a threshold value.

[0027] The process up to the execution of the three-phase short circuit control in the ECU 25 and the process up to the release of the three-phase short circuit control in the ECU 25 will be described below with reference to the flowcharts in Figs. 6 to 8. The following description will be given of a case where left and right brake levers 2c are provided as two brake operators. The above process is repeatedly executed at a predetermined cycle while the power supply is ON (the main switch of the electric motorcycle 1 is ON). The ECU 25 sends a command to the control unit of the PCU 22 to execute the three-phase short circuit control.

[0028] A first example of the processing up to the execution of three-phase short circuit control will be described with reference to FIG. First, in step S11, it is determined whether the electric motorcycle 1 is in a stopped state. This determination is made, for example, by determining whether the vehicle speed is 0 km (or whether a predetermined time has elapsed at a vehicle speed of 0 km). If the answer is YES in step S11 (the electric motorcycle 1 is in a stopped state), the process proceeds to step S12. If the answer is NO in step S11 (the electric motorcycle 1 is not in a stopped state), the process is temporarily terminated. In step S12, it is determined whether the inclination of the vehicle body in the fore-and-aft direction (gradient of the road surface G) while the vehicle is stopped is equal to or greater than a specified angle θ1. This determination is made, for example, based on the detection value of the acceleration sensor 26 mounted on the electric motorcycle 1. For example, it is determined whether the absolute value of the angle (inclination rising from the front or rear) detected by the acceleration sensor 26 is equal to or greater than the specified angle θ1. The inclination angle of the vehicle body detected by the acceleration sensor 26 corresponds to the inclination angle θ (uphill or downhill gradient) of the road surface G on which the electric motorcycle 1 is stopped. If the result of step S12 is YES (the inclination angle θ1 (absolute value) is equal to or greater than the specified angle θ1), the process proceeds to step S13. If the result of step S12 is NO (the inclination angle θ1 (absolute value) is less than the specified angle θ1), the process is temporarily terminated.

[0029] In step S13, it is determined whether the operation amount (and therefore the operation force) of each brake lever 2c is equal to or greater than a specified value (threshold value, second lever position P2). This determination is made based on the detection value of the brake operation amount sensor. When the motor is stopped by braking, if the gradient of the road surface G is large, there is a risk that the electric motorcycle 1 may start moving due to this gradient. In particular, if the electric motorcycle 1 is stopped on an uphill gradient, the electric motorcycle 1 may unintentionally roll backward.

[0030] In this embodiment, in addition to the normal braking operation detected when the brake switch 2d is turned on, when the brake lever 2c is also gripped, three-phase short-circuit control of the electric motor 20 is performed, thereby more reliably preventing the electric motorcycle 1 from moving forward or backward when stopped. If the answer to step S13 is YES (the operation amount of each brake lever 2c is equal to or greater than the specified value), the process proceeds to step S14 and three-phase short-circuit control is performed. If the answer to step S13 is NO (the operation amount of each brake lever 2c is less than the specified value), the process is temporarily terminated.

[0031] "YES" in step S13 may be, for example, when the operation amount of both of the two brake levers 2cL, 2cR is equal to or greater than a specified value, or when the operation amount of only one of the two brake levers 2cL, 2cR is equal to or greater than a specified value. In other words, it is sufficient if the operation amount of at least one of the two brake levers 2cL, 2cR is equal to or greater than a specified value.

[0032] A second example of the processing up to the execution of three-phase short circuit control will be described with reference to FIG. The second example differs from the first example in that it includes step S23 instead of step S13. Other components that are the same as those in the first example are given the same reference numerals and descriptions thereof will be omitted.

[0033] In step S23, it is determined whether or not both brake levers 2c have been operated. This determination is made based on at least one of the on / off state of the brake switch 2d and the detected value of the brake operation amount sensor. In an electric motorcycle 1 equipped with two brake operators, the continued operation of both brake operators even after the vehicle has stopped is recognized as an attempt to reliably suppress the movement of the electric motorcycle 1 while it is stopped. For this reason, in the second example, when the operation of the two brake levers 2c continues even after the vehicle has stopped, three-phase short-circuit control of the electric motor 20 is implemented, thereby more reliably suppressing the forward and backward movement of the electric motorcycle 1 while it is stopped. If the answer to step S23 is YES (the operation of the two brake levers 2c continues), the process proceeds to step S14 and three-phase short-circuit control is performed. If the answer to step S23 is NO (the operation of at least one of the two brake levers 2c is released), the process is temporarily terminated. The "YES" in step S23 may be determined as long as the brake switches 2d of at least two brake levers 2c are on. The "YES" in step S23 may also be determined as a condition that the operation amount of at least one of the two brake levers 2c is equal to or greater than a specified value, for example.

[0034] The process up to the release of the three-phase short circuit control will be described with reference to FIG. First, in step S31, it is determined whether or not three-phase short circuit control is being performed. If the answer is YES in step S31 (the three-phase short circuit control is being performed), the process proceeds to step S32. If the answer is NO in step S31 (the three-phase short circuit control is not being performed), the process is temporarily terminated. In step S32, it is determined whether or not both brake operators are released. This determination is made, for example, by checking whether or not the brake switch 2d of each brake lever 2c is off. If the answer is YES in step S32 (the brake operation is released), the process proceeds to step S33. If the answer is NO in step S32 (the brake operation is not released), the process is temporarily terminated. In step S33, it is determined whether the accelerator is opened. This determination is made, for example, based on the detection value of an accelerator opening sensor linked to the accelerator grip 2aR. If the answer is YES in step S33 (the accelerator is opened), the process proceeds to step S34. If the answer is NO in step S33 (the accelerator is not opened), the process is temporarily terminated.

[0035] In step S34, the three-phase short circuit control is released, and the electric motor 20 is driven in accordance with the accelerator opening, allowing the electric motorcycle 1 to travel. With this control, even if the gradient of the road surface G when the vehicle is stopped is large, the three-phase short-circuit control is maintained until the occupant R opens the accelerator. Therefore, for example, when restarting the electric motorcycle 1 from a stop on an uphill slope, the electric motorcycle 1 is prevented from rolling back between the time the brake is released and the time the accelerator is opened.

[0036] As described above, in the saddle-type electric vehicle in the above embodiment, the electric two-wheeled vehicle 1 includes an electric motor 20 that drives the vehicle, a control device (ECU 25) that controls the supply of power to the electric motor 20, and a brake operator (brake lever 2c) that is operated by the rider R to activate the brake device. When the brake lever 2c is operated to a predetermined threshold value (second lever position P2) or more, the ECU 25 short-circuits the electric motor 20 in three phases. According to this configuration, when the brake lever 2c is operated to a predetermined threshold or more, three-phase short-circuit control of the electric motor 20 is performed, and in addition to the activation of the brake device by the brake operation, motor braking by the electric motor 20 is generated, making it possible to easily and reliably stop the vehicle. As a result, even when restarting the vehicle after stopping on a sloped road surface G, movement of the vehicle due to the slope of the road surface G can be prevented, and a smooth and quick start can be achieved.

[0037] Furthermore, in the electric motorcycle 1, the ECU 25 may be configured to short-circuit the electric motor 20 in three phases when both of the brake levers 2cL, 2cR are operated. According to this configuration, when multiple brake levers 2cL, 2cR are operated simultaneously, three-phase short-circuit control of the electric motor 20 is performed, and in addition to the activation of the brake device by the brake operation, motor braking by the electric motor 20 is generated, making it possible to easily and reliably stop the vehicle. As a result, even when restarting the vehicle after stopping on a sloped road surface G, movement of the vehicle due to the slope of the road surface G can be prevented, allowing for a smooth and quick start.

[0038] The electric two-wheeled vehicle 1 is provided with an accelerator operator (accelerator grip 2aR) that is operated by the rider R to drive the electric motor 20, and the ECU 25 short-circuits the electric motor 20 in three phases, and then releases the three-phase short-circuit when the accelerator grip 2aR is opened. According to this configuration, by releasing the three-phase short circuit control of the electric motor 20 in response to accelerator operation, the stopped state caused by the three-phase short circuit can be easily released by operations during normal driving, allowing for smooth and quick starting.

[0039] The present invention is not limited to the above embodiment, and for example, the inclination of the vehicle body in the longitudinal direction is detected by an inclination sensor, and the three-phase short circuit control is performed when the inclination of the vehicle body (corresponding to the inclination of the road surface G) is greater than or equal to a predetermined value. However, the three-phase short circuit control may be performed when a specified brake operation is performed, regardless of the inclination of the road surface G. The three-phase short circuit control may be set to be released not only when the accelerator is released, but also after a predetermined time of, for example, about 1 to 2 seconds has elapsed after the brake operation is released. The power unit of this embodiment may be applied to saddle-ride type vehicles other than motorcycles. The saddle-type vehicle includes all vehicles on which the driver straddles the body, including not only motorcycles (including motorized bicycles and scooter-type vehicles), but also three-wheeled vehicles (including vehicles with one front wheel and two rear wheels, as well as vehicles with two front wheels and one rear wheel) or four-wheeled vehicles (such as four-wheeled buggies). The configurations in the above-described embodiments are merely examples of the present invention, and various modifications are possible within the scope of the gist of the present invention, such as replacing the components of the embodiments with well-known components. [Explanation of symbols]

[0040] 1. Electric two-wheeled vehicles (saddle-type electric vehicles) 2aR Accelerator Grip (Accelerator Operator) 2c Brake lever (brake operator) 2cL, 2cR Left and right brake levers (multiple brake operators) 20 Electric motor 25 ECU (control unit) G road surface P2 Second lever position (threshold)

Claims

1. A saddle-type electric vehicle (1) including an electric motor (20) for propelling the vehicle, a control device (25) for controlling the supply of power to the electric motor (20), and a brake operator (2c) operated by a rider to activate a brake device, When the slope of the road surface is greater than the specified angle, The control device (25) short-circuits the three phases of the electric motor (20) when the brake operator is operated to a greater extent than the operation that turns on the brake switch and is operated to a specified threshold value or more.

2. A saddle-ride type electric vehicle (1) including an electric motor (20) for propelling the vehicle, a control device (25) for controlling the supply of power to the electric motor (20), and a plurality of brake operators (2cL, 2cR) for actuating a brake device by being operated by a rider, When the slope of the road surface is greater than the specified angle, The control device (25) short-circuits the electric motor (20) in three phases when the plurality of brake operators (2cL, 2cR) are all operated to a greater extent than the operation that turns on the brake switch.

3. 3. The saddle-ride type electric vehicle according to claim 1, further comprising an accelerator operator (2aR) that is operated by a rider to drive the electric motor (20), wherein the control device (25) causes a three-phase short circuit in the electric motor (20) and then releases the three-phase short circuit when the accelerator operator (2aR) is opened.

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