Electric vehicle
An electric vehicle has simple structure allowing effective cooling of on-board batteries collectively disposed within a swing arm. The electric vehicle includes a swing arm that houses an electric motor that is swingably mounted to a vehicle body and drives a drive wheel WR, and batteries of a substantially rectangular parallelepiped. A wide case portion that houses the batteries is formed at a position toward a pivot shaft of the swing arm. Also, a protruding portion for forming an air reservoir space above the batteries is formed at a roof portion of the wide case portion. The batteries are disposed side by side in a front-rear direction of the vehicle body. The protruding portion, in a side view of the vehicle body, is substantially convex protruding upward across the batteries.
1. An electric vehicle, comprising:
a vehicle body;
a drive wheel;
an electric motor for driving said drive wheel;
at least two batteries having a substantially rectangular parallelepiped shape; and
a swing arm swingably mounted to said vehicle body by a pivot shaft, said swing arm comprising a wide case portion disposed directly in front of an arm portion, in a front-rear direction of the vehicle body, said wide case portion being wider than said arm portion, in a vehicle width direction,
wherein said wide case portion houses said at least two batteries,
wherein said arm portion houses said electric motor, and
wherein said swing arm includes a protruding portion forming an air reservoir space above said at least two batteries, said protruding portion being a roof portion of said wide case portion,
wherein said electric vehicle further comprises a cooling duct for causing traveling wind introduced from a front of said vehicle body to blow onto said protruding portion, and
wherein said cooling duct includes an exhaust port disposed forward of said protruding portion, such that a space is present between said exhaust port and said protruding portion.
2. The electric vehicle according to claim 1 ,
wherein said at least two batteries are disposed in a line in the front-rear direction of said vehicle body; and
wherein, in a side view of said vehicle body, the protruding portion is substantially convex and protrudes upward from said at least two batteries.
3. The electric vehicle according to claim 2 , wherein a surface of said protruding portion includes heat releasing fins.
4. The electric vehicle according to claim 3 , wherein said swing arm further comprises a substrate having a drive circuit of said electric motor and a charging circuit for said at least two batteries.
5. The electric vehicle according to claim 2 , wherein said swing arm further comprises a substrate having a drive circuit of said electric motor and a charging circuit for said at least two batteries.
6. The electric vehicle according to claim 1 ,
wherein said at least two batteries are disposed in a line in the front-rear direction of said vehicle body;
wherein, in a side view of the vehicle body, said at least two batteries are disposed parallel to each other and are inclined rearwardly, relative to a lower wall of the swing arm; and
wherein said air reservoir space is provided above said at least two batteries.
7. The electric vehicle according to claim 6 , wherein said at least two batteries are inclined such that vertical positions of said at least two batteries are equal.
8. The electric vehicle according to claim 6 , wherein said swing arm further comprises a substrate having a drive circuit of said electric motor and a charging circuit for said at least two batteries.
9. The electric vehicle according to claim 1 , wherein a surface of said protruding portion includes heat releasing fins.
10. The electric vehicle according to claim 9 , wherein said swing arm further comprises a substrate having a drive circuit of said electric motor and a charging circuit for said at least two batteries.
11. The electric vehicle according to claim 1 ,
wherein said at least two batteries are disposed in a line in the front-rear direction of said vehicle body;
wherein, in a side view of the vehicle body, a rear battery among said at least two batteries is offset upwardly with respect to a front battery among said at least two batteries; and
wherein said air reservoir space is provided above said front battery.
12. The electric vehicle according to claim 11 , wherein said swing arm further comprises a substrate having a drive circuit of said electric motor and a charging circuit for said at least two batteries.
13. The electric vehicle according to claim 1 , further comprising a partition plate at least partially enclosing said at least two batteries in said wide case portion.
14. The electric vehicle according to claim 1 , wherein at least a portion of said wide case portion is disposed above said pivot shaft.
15. The electric vehicle according to claim 1 , wherein said swing arm further comprises a substrate having a drive circuit of said electric motor and a charging circuit for said at least two batteries.
16. The electric vehicle according to claim 1 , wherein said swing arm is disposed only on one side of said drive wheel.