CN211731061U

CN211731061U - Underbody structure of electric vehicle

Info

Publication number: CN211731061U
Application number: CN202020145174.8U
Authority: CN
Inventors: 西野章; 平良朝己
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-10-23
Anticipated expiration: 2030-01-22

Abstract

The utility model provides a car body substructure of electric motor car. The underbody structure of an electric vehicle includes a battery disposed below a floor of the vehicle body, a battery protection cover provided at a lower portion in front of the battery, and an air conditioner. Based on the above structure of the utility model, can make the lower extreme exhaust comdenstion water of following the drain pipe flow toward the automobile body rear side through the drainage route, consequently, the comdenstion water can not be detained near the lower extreme of drain pipe, can prevent to be detained near the ponding of lower extreme of drain pipe and freeze in winter and lead to the condition emergence of drain pipe jam.

Description

Underbody structure of electric vehicle

Technical Field

The utility model relates to an automobile body substructure of electric motor car.

Background

Conventionally, electric vehicles (ev) using an electric motor as a power source have been widely used. In some electric vehicles, a large battery is disposed under a floor. In such a configuration, a battery protection cover is generally provided at a lower front portion of the battery. The battery protection cover is used to protect the battery from being damaged by stones or the like bouncing from the road surface during the driving of the electric vehicle.

Further, a motor compartment is disposed on the front side of the vehicle compartment of the electric vehicle. In the motor compartment, an air conditioner is disposed in addition to the motor. The air conditioner includes a refrigerant circuit having an evaporator. A drain pipe for discharging condensed water generated in the evaporator is connected to the evaporator. The drain pipe extends downward from the evaporator.

When the battery protection cover is provided, there is a structure in which the battery protection cover is provided on the lower side of the drain pipe. In order to prevent the influence of the road surface, it is necessary to dispose the battery protection cover at a position higher than a predetermined height. Therefore, the lower end of the drain pipe may be very close to the upper surface of the battery protection cover. In this case, there is a possibility that the drain pipe is not smoothly drained, and accumulated water staying near the lower end of the drain pipe freezes in winter, causing clogging of the drain pipe.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the present invention is to provide an electric vehicle underbody structure that employs a structure in which a battery protection cover is disposed on the lower side of a drain pipe to enable smooth drainage of the drain pipe.

As a technical solution to solve the above technical problem, the present invention provides an underbody structure of an electric vehicle, the underbody structure of the electric vehicle includes a battery disposed on a lower side of a floor of a vehicle body, a battery protection cover disposed on a lower side of a front of the battery, and an air conditioner, a lower end of a drain pipe of the air conditioner is disposed above the battery protection cover, and the air conditioner is characterized in that: the battery protection cover is provided with a drain passage that faces the lower end of the drain pipe and that extends toward the rear side of the vehicle body while inclining downward.

The utility model discloses an above-mentioned electric motor car's automobile body substructure's advantage lies in, can make the drain pipe drainage smooth and easy. Specifically, by providing the drain passage inclined downward while extending toward the rear side of the vehicle body, which is opposed to the lower end of the drain pipe, in the battery protection cover, the condensed water discharged from the lower end of the drain pipe can be made to flow toward the rear side of the vehicle body through the drain passage. Therefore, the condensed water does not remain near the lower end of the drain pipe, and the accumulated water remaining near the lower end of the drain pipe can be prevented from freezing in winter to block the drain pipe.

The utility model discloses an among the automobile body substructure of above-mentioned electric motor car, the preferred does, the lower extreme of drain pipe highly is higher than the height at the highest position of height on the battery safety cover. Based on this structure, even ponding such as comdenstion water appears on the upper portion of battery safety cover, also can avoid the water level of ponding that is detained on the battery safety cover to reach the height of drain pipe lower extreme to can further prevent ponding and freeze in winter and lead to the condition emergence of drain pipe jam.

Drawings

Fig. 1 is a bottom view showing a vehicle body lower portion structure of an electric vehicle according to an embodiment of the present invention.

Fig. 2 is a sectional view taken along line a-a in fig. 1.

Fig. 3 is a sectional view taken along line B-B in fig. 1.

Fig. 4 is a sectional view taken along line C-C in fig. 3.

Detailed Description

Hereinafter, a vehicle body lower portion structure 100 of an electric vehicle 200 according to an embodiment of the present invention will be described with reference to the drawings. The electric vehicle 200 is a vehicle having an electric motor as a power source.

Fig. 1 is a bottom view showing a vehicle body lower portion structure 100 of an electric vehicle 200 according to the present embodiment. In the drawings, the direction of arrow F indicates the front of the vehicle body; the direction of arrow B indicates the rear of the vehicle body; the direction of arrow U indicates above the vehicle body; the direction of arrow D indicates the lower side of the vehicle body; the direction of arrow L indicates the left of the vehicle body; the direction of the arrow R indicates the right direction of the vehicle body.

As shown in fig. 1, a front floor 10, side members 21 and 22,

lower members

31 and 32, front suspension members 40, suspension cross members 45, a lower frame 50, and a battery protection cover 51, which constitute a vehicle body lower portion structure 100, are disposed on a vehicle body 110 of an electric vehicle 200.

In a front compartment 120 located at the front portion of the vehicle body 110, a power transmission device such as an electric motor, a transaxle, and a PCU (power supply control unit), and an air conditioner (not shown) are arranged.

Front floor 10 is disposed on the bottom surface of vehicle body 110. The side sills 21, 22 are disposed on the left and right sides of the front floor 10. The side members 21 and 22 extend in the vehicle body front-rear direction.

The lower beam 31 and the lower beam 32 are disposed on the bottom surface of the vehicle body 110. The lower beam 31 and the lower beam 32 extend in the vehicle body front-rear direction.

The front suspension beam 40 is disposed below the lower beam 31 and the lower beam 32. The front suspension beam 40 has

side rails

41 and 42, a front cross member 43, a rear cross member 44, and a suspension cross member 45.

The suspension cross member 45 is disposed below the rear cross member 44. The suspension cross member 45 is configured to extend in the vehicle body left-right direction.

Further, a battery 150 is disposed between the lower beam 31 and the lower beam 32. In the vehicle body front-rear direction, the battery 150 is disposed further on the vehicle body rear side than the front suspension member 40 and at the lower portion of the vehicle body 110.

Fig. 2 is a sectional view taken along line a-a in fig. 1. As shown in fig. 2, a harness 151 is connected to the battery 150. The wiring harness 151 extends from the battery 150 to the vehicle front compartment 120. Harness 151 is connected to a PCU and battery 150 disposed in front compartment 120.

The lower frame 50 is disposed below the battery 150.

The battery protection cover 51 is made of a metal (e.g., iron) plate material, and is disposed between the suspension cross member 45 and the lower frame 50. The battery protection cover 51 is located below the wire harness 151. The battery protection cover 51 protects the battery 150 and the harness 151 from a load from below (for example, an impact load of an impact object such as a stone bouncing from a road surface).

The front end of the battery protection cover 51 is supported by the suspension cross member 45 by the 1 st fixing portion 61. The rear end of the battery protection cover 51 is supported by the 2 nd fixing portion 62 on the lower frame 50. The 1 st fixing part 61 and the 2 nd fixing part 62 include bolts.

The front of the battery 150 is connected to a wiring harness 151 via a connector 152. Harness 151 passes above battery protection cover 51 and is connected to the PCU in front compartment 120.

Fig. 3 is a sectional view taken along line B-B in fig. 1. As shown in fig. 3, the lower end of the drain pipe 70 extending downward from the evaporator provided in the refrigerant circuit of the air conditioner is positioned above the battery protection cover 51. The drain pipe 70 is made of rubber, and is a hose for discharging condensed water generated from the evaporator. Specifically, a condensate tray for collecting condensate water is provided at a lower side of the evaporator. An opening is formed at a portion of the condensed water tray, and an upper end of the drain pipe 70 is connected to the opening. Thus, the condensed water generated from the evaporator is drained downward from the condensed water tray through the drain pipe 70.

A drain passage 52 is provided in a portion of the battery protection cover 51 that faces the lower end of the drain pipe 70. The drain passage 52 is configured to extend toward the rear side of the vehicle body while being inclined downward, so that the condensed water discharged from the lower end of the drain pipe 70 can flow toward the rear side of the vehicle body.

Fig. 4 is a sectional view of the battery protection case 51 taken along the line C-C in fig. 3. As shown in fig. 4, the drainage channel 52 is formed by bending a part of the battery protection cover 51 downward. That is, the drainage passage 52 is constituted by a pair of

vertical wall portions

53 and 54 facing each other in the vehicle width direction, and a floor portion 55 connecting lower end portions of the two

vertical wall portions

53 and 54. The floor portion 55 is configured to be inclined downward at a predetermined angle (for example, 15 °) so as to be lowered toward the height position on the vehicle body rear side, and thereby the condensed water discharged from the lower end of the drain pipe 70 is caused to flow toward the vehicle body rear side. That is, the drain passage 52 is configured to incline downward while extending toward the vehicle rear side in the vehicle longitudinal direction. The front end of the drain path 52 is located at a position facing the lower end of the drain pipe 70 (a position below the lower end of the drain pipe 70). The rear end of the drainage channel 52 is located at the rear end edge of the battery protection cover 51.

Since the drain passage 52 is provided in the battery protection cover 51, the condensed water discharged from the lower end of the drain pipe 70 can be discharged to the rear side of the vehicle body through the drain passage 52. Therefore, the condensed water does not stay near the lower end of the drain pipe 70, and the accumulated water staying near the lower end of the drain pipe 70 can be prevented from freezing in winter and blocking the drain pipe 70.

The height of the lower end of the drain pipe 70 (height H1 in fig. 3) is set to be higher than the height of the highest portion of the battery protection cover 51 (height H2 in fig. 3). In the present embodiment, the highest portion of the battery protection cover 51 is a portion where the battery protection cover 51 is supported by the suspension cross member 45. The height H1 of the lower end of the drain pipe 70 is set to be higher than the height H2 of the highest portion by a predetermined dimension (e.g., 30 mm).

With the above configuration, even when water accumulation such as condensed water occurs in the upper portion of the battery cover 51, the height H1 of the lower end of the drain pipe 70 is higher than the height H2 of the highest portion of the battery cover 51, and therefore, the water level of the water accumulation on the battery cover 51 can be prevented from reaching the height of the lower end of the drain pipe 70. In this way, the occurrence of clogging of the drain pipe 70 due to freezing of accumulated water in winter can be further prevented.

Further, since the water drainage channel 52 extends in the vehicle body front-rear direction, water in the water drainage channel 52 flows toward the vehicle body rear side with respect to the water drainage channel 52 by the inertial force at the time of starting or accelerating the vehicle. Thus, the condensed water can be effectively prevented from being accumulated in the vicinity of the lower end of the drain pipe 70, and the drain pipe 70 can be prevented from being clogged due to the accumulated water in the vicinity of the lower end of the drain pipe 70 freezing in winter.

The present invention is not limited to the above embodiments, and can be modified as appropriate. For example, in the above-described embodiment, a case where the highest portion of the battery protection cover 51 having the highest height is a portion supported by the suspension cross member 45 has been described. When the other portion is the highest portion of the battery protection cover 51, the height of the lower end of the drain pipe 70 may be set to be higher than the highest portion.

Claims

1. A vehicle underbody structure of an electric vehicle, comprising a battery disposed on a lower side of a floor of a vehicle body, a battery protection cover provided on a front lower portion of the battery, and an air conditioner, wherein a lower end of a drain pipe of the air conditioner is positioned above the battery protection cover, characterized in that:

the battery protection cover is provided with a drain passage that faces the lower end of the drain pipe and that extends toward the rear side of the vehicle body while inclining downward.

2. The vehicle body lower structure of an electric vehicle according to claim 1, wherein:

the height of the lower end of the drain pipe is higher than that of the highest position on the battery protection cover with the highest height.