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US-12617486-B2 - Electric vehicle

US12617486B2US 12617486 B2US12617486 B2US 12617486B2US-12617486-B2

Abstract

An electric vehicle comprises: a vehicle body frame that includes a down frame and a pivot frame, the down frame extending downward from a head pipe, the pivot frame pivotally supporting a rear wheel; a battery that is disposed in an extending manner between the down frame and the pivot frame; and a radiator that cools an electric vehicle functional part. In the electric vehicle, the battery is disposed such that a rear side of a battery bottom surface is lower than a front side of the battery bottom surface, and the radiator is disposed below the battery bottom surface.

Inventors

  • Keisuke Nakata

Assignees

  • HONDA MOTOR CO., LTD.

Dates

Publication Date
20260505
Application Date
20240320
Priority Date
20230331

Claims (9)

  1. 1 . An electric vehicle comprising: a vehicle body frame that includes a down frame and a pivot frame, the down frame extending downward from a head pipe, the pivot frame pivotally supporting a rear wheel; a battery that is disposed in an extending manner between the down frame and the pivot frame; and a radiator that cools an electric vehicle functional part, wherein the battery is disposed such that a rear side of a battery bottom surface is lower than a front side of the battery bottom surface, and the radiator is disposed below the battery bottom surface; and wherein the radiator is positioned above a rear end of the battery bottom surface and below a front end of the battery bottom surface, and the radiator is disposed behind a front wheel.
  2. 2 . The electric vehicle according to claim 1 , wherein a front surface of the radiator is disposed such that a lower portion of the front surface is positioned in front of an upper portion of the front surface.
  3. 3 . The electric vehicle according to claim 1 , wherein a lower end of the pivot frame is positioned below a lower end of the down frame, and the battery bottom surface, as viewed in a side view of the vehicle, extends along a line that connects the lower end of the down frame and the lower end of the pivot frame.
  4. 4 . The electric vehicle according to claim 1 , wherein as viewed in a side view of the vehicle, the radiator is disposed on an extension of the down frame.
  5. 5 . The electric vehicle according to claim 1 , wherein a lowermost portion of the radiator is positioned below a line that connects a front wheel shaft and a rear wheel shaft as viewed in a side view of the vehicle.
  6. 6 . The electric vehicle according to claim 1 , wherein the radiator is supported by way of a bracket that extends from the battery bottom surface or from a lower end of the down frame.
  7. 7 . The electric vehicle according to claim 6 , wherein a charger is disposed between the radiator and the battery bottom surface, and the charger is supported by way of the bracket.
  8. 8 . The electric vehicle according to claim 1 , wherein a PCU is disposed above the battery, a motor is disposed above a pivot shaft of the pivot frame from which the rear wheel is suspended, and behind the PCU, a charger, the PCU, and a cooling channel to which the motor is connected are connected to the radiator, and cooling water is circulated in order from the charger, the PCU and the motor or in ascending order according to a heat value thereof.
  9. 9 . The electric vehicle according to claim 8 , wherein the radiator includes an air cooling fan, a water pump is provided to the cooling channel, and the air cooling fan and the water pump are disposed behind the radiator and between the radiator and the battery.

Description

INCORPORATION BY REFERENCE The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2023-059256 filed on Mar. 31, 2023. The content of the application is incorporated herein by reference in its entirety. TECHNICAL FIELD The present invention relates to an electric vehicle. BACKGROUND ART Conventionally, there has been known an electric vehicle that includes a battery, and a motor that drives a rear wheel using electricity from the battery (see patent document 1). Patent document 1 describes an electric vehicle that includes: a down frame that extends downward from a head pipe; and a pivot frame that suspends the rear wheel, and includes a battery extending between the down frame and the pivot frame, in which a radiator that cools the motor is disposed below a seat. PRIOR ART Patent Document Patent Document 1 International publication No. WO2019/049462 SUMMARY OF THE INVENTION Technical Problem In general, an electric motor requires a battery having a large capacity for increasing a cruising distance. Accordingly, in an electric vehicle that includes a battery extending between a down frame and a pivot frame, the layout of functional parts is difficult because of the battery. In the technique described in patent document 1, a radiator fan is provided for imparting air guiding property to a radiator, thereby the degree of freedom in the layout of the radiator is ensured, and the radiator is disposed below a seat. On the other hand, if the radiator could be disposed at a position where the radiator can easily receive a larger amount of air, it is advantageous from a viewpoint of cooling property. The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an arrangement structure of a radiator that can easily receive traveling air in an electric vehicle that includes a battery extending between a down frame and a pivot frame. Solution to Problem An electric vehicle comprises: a vehicle body frame that includes a down frame and a pivot frame, the down frame extending downward from a head pipe, the pivot frame pivotally supporting a rear wheel; a battery that is disposed in an extending manner between the down frame and the pivot frame; and a radiator that cools an electric vehicle functional part. In the electric vehicle, the battery is disposed such that a rear side of a battery bottom surface is lower than a front side of the battery bottom surface, and the radiator is disposed below the battery bottom surface. Advantageous Effects of Invention It is possible to provide an arrangement structure of a radiator that can easily receive traveling air in an electric vehicle that includes a battery extending between a down frame and a pivot frame. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a left side view of an electric two-wheeled vehicle according to an embodiment of a present invention. FIG. 2 is a right side view of the electric two-wheeled vehicle according to the embodiment of the present invention. FIG. 3 is a front view of the electric two-wheeled vehicle according to the embodiment of the present invention. FIG. 4 is a plan view of the electric two-wheeled vehicle according to the embodiment of the present invention. FIG. 5 is a bottom plan view of the electric two-wheeled vehicle according to the embodiment of the present invention. FIG. 6 is a left side view illustrating a main part of the electric two-wheeled vehicle in which the illustration of vehicle body cover is omitted. FIG. 7 is a front view of a pivot frame. FIG. 8 is a left side view of the pivot frame. FIG. 9 is a rear view of the pivot frame. FIG. 10 is a right side view of the pivot frame. FIG. 11 is a cross-sectional view taken along a line XI-XI in FIG. 6. FIG. 12 is a cross-sectional view taken along a line XII-XII in FIG. 6. FIG. 13 is a perspective view illustrating a periphery of a lower portion of a battery case as viewed from a front left side. FIG. 14 is a perspective view illustrating a main part of the electric two-wheeled vehicle as viewed from a right rear side in which the illustration of the vehicle body cover is omitted. FIG. 15 is a rear view of the electric two-wheeled vehicle that uses a side stand. FIG. 16 is a left side view of an electric two-wheeled vehicle according to a second embodiment of the present invention. DESCRIPTION OF EMBODIMENTS The following describes an embodiment of the present invention with reference to the drawings. Note that, in the description, descriptions on directions such as front and rear, right and left, and upper and lower are identical to directions with respect to a vehicle body insofar as descriptions are not particularly given. Reference sign FR illustrated in each drawing indicates a front side of the vehicle body, reference sign UP indicates an upper side of the vehicle body, and reference sign LH indicates a left side of the vehicle body. Embodiment FIG. 1 is a left side view of an elec