JP2000092624A - Battery cooling structure of electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of an air suction duct. SOLUTION: A hollow cross member 15 is connected to be communicated with a hollow front side member 13 in the front part of a front body, and an air suction duct 7 attached to the suction inlet 5 of the front end part of a battery frame 1 is connected to be communicated with the cross member 15 to compose a cooling air introducing passage 20. With this constitution, the length of the air suction duct 7 can be limited by a distance between the front end part of the battery frame 1 and the cross member 15, so that the size of the air suction duct 7 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a battery cooling structure for an electric vehicle.

[0002]

2. Description of the Related Art In an electric vehicle, a battery for driving a motor occupies a considerable weight and mounting space. The battery is fastened and fixed to the floor frame member so that the battery is mounted below the vehicle body floor.

[0003] When a plurality of batteries are hermetically housed in a battery frame below the vehicle body floor as described above, the batteries generate heat and the battery function deteriorates. For example, this is disclosed in JP-A-8-244473. As described above, an intake port is provided at the front end of the battery frame, an intake duct is connected to the intake port, and the intake duct is disposed upward from the lower side of the vehicle body floor along the dash panel to form an upper end. Is connected to the cowl box, the cooling air is taken in from the cowl box, introduced into the intake port through the intake duct, and discharged from the exhaust port provided at the rear end of the battery frame to remove the battery in the battery frame. A cooling structure is adopted.

[0004]

Since the intake duct is arranged over the cowl box from the bottom of the floor along the dash panel, the intake duct becomes large and the duct layout becomes difficult. In addition, the increase in the size of the intake duct reduces the space in the motor room and the passenger compartment.

Accordingly, the present invention provides a battery cooling structure for an electric vehicle that can reduce the size of the intake duct and facilitate the layout of the duct, and does not affect the space in the motor room and the passenger compartment. Things.

[0006]

According to the first aspect of the present invention, a plurality of batteries are hermetically housed therein and an intake port is provided at a front end of a battery frame which is fastened and fixed to a floor frame member on a lower surface of a vehicle body floor. And a structure in which an exhaust port is provided at a rear end portion of the battery frame to introduce air for battery cooling into the battery frame.
A hollow vehicle width direction skeletal member is communicatively connected to a pair of left and right hollow front / rear direction skeletal members provided at a front part of the vehicle body in front of the battery frame disposing portion, and the vehicle width direction skeletal member and an intake port of the battery frame are connected. It is characterized in that the cooling air introduction passage is constituted by the front-rear direction frame member, the vehicle width direction frame member, and the intake duct, which are connected to each other by an intake duct.

According to a second aspect of the present invention, a suspension mount bracket having hollow legs is provided at each connecting portion between the pair of longitudinal skeleton members and the vehicle width direction skeleton member according to the first aspect. The leg portions are communicated with the bottom wall portion of the longitudinal frame member, and the vehicle width direction frame member is communicatively connected to these legs.

According to the third aspect of the present invention, the suspension mount bracket according to the second aspect has a leg portion which is two front and rear portions.
The vehicle frame is configured to be separated and independent, and the vehicle width direction frame member is connected to the front-rear frame member via the rear leg portion, while the front leg portion is connected to the bottom wall portion of the front-rear frame member. And a drain port is provided at the lower end of the front leg.

According to the invention of claim 4, claims 2 and 3 are provided.
A flange protruding upward is provided at the rear edge of the opening of the bottom wall of the longitudinal frame member to which the leg portion of the suspension mount bracket is connected and connected.

In the invention of claim 5, claims 1 to 4 are provided.
Is a cross member that is communicatively connected across the left and right longitudinal frame members.

According to the invention of claim 6, claims 1 to 4 are provided.
A pair of left and right outriggers connecting the left and right longitudinal frame members and the lower surface of the dash lower panel, and the end portions of these outriggers on the vehicle center side are connected to the intake duct. It is characterized by.

In the invention of claim 7, claims 1 to 6 are provided.
A blower unit for forcibly guiding cooling air into the battery frame is provided in the cooling air introduction passage in front of the intake port.

According to the invention of claim 8, claims 1 to 7 are provided.
Wherein a blower unit for forcibly introducing cooling air into the battery frame is connected and fixed to the vehicle width direction frame member, and an intake duct is connected to the vehicle width direction frame member through the blower unit. And

According to a ninth aspect of the present invention, the blower unit according to the eighth aspect is connected to the intake duct by a flexible duct.

In the tenth aspect of the present invention,
9, the air inlet is formed on the lower side of the battery frame, while the air outlet is formed on the upper side of the battery frame.
It is characterized in that cooling air is passed upward from the lower side of the battery and discharged.

[0016]

According to the first aspect of the present invention, a pair of left and right hollow longitudinal skeleton members provided at the front portion of the vehicle body and a hollow vehicle width direction skeleton member connected to these longitudinal skeleton members are effective. Utilizing the front-back direction frame member and the vehicle width direction frame member to communicate with each other, and connecting the vehicle width direction frame member and the intake port at the front end of the battery frame by an air intake duct to form a cooling air introduction passage. Therefore, the cooling air introduced from the front end of the longitudinal frame member can be smoothly introduced into the battery frame by the cooling air introduction passage,
During traveling of the vehicle, the cooling air can be introduced by using the ram pressure at the front of the vehicle body, so that the ability of the cooling air to guide the air into the battery frame can be improved, and the battery cooling effect can be enhanced.

[0017] Further, since the intake duct only needs to have a length connecting the intake port at the front end of the battery frame and the frame member in the vehicle width direction adjacent to the front of the front end of the battery frame, the intake duct should be as small as possible. In addition to being able to be reduced in size and being advantageous in terms of cost, the layout of the air duct is not affected at all, unlike the arrangement of the intake duct along the dash panel. In particular, when used in a small car, the degree of freedom of design can be increased, and the motor room and the cabin can be enlarged.

Further, since a hollow vehicle width direction frame member is connected to the front-rear direction frame member, the rigidity of the front portion of the vehicle body can be increased, and the vehicle width direction frame member is provided on the front side of the battery frame. Because of the presence, the vehicle width direction skeletal member functions as a protector at the time of a frontal collision of the vehicle, so that the battery can be protected.

According to the second aspect of the present invention, the first aspect is provided.
In addition to the effects of the invention, a suspension mount bracket is connected to a connecting portion between the longitudinal frame member and the vehicle width direction frame member, and these longitudinal frame members are connected via hollow legs of the suspension mount bracket. And the vehicle width direction skeletal member are coupled to each other, and the coupled portion can be solidified in a closed cross-sectional structure, so that the strength rigidity of the front portion of the vehicle body can be further increased and the suspension support rigidity can be increased.

According to the invention of claim 3, according to claim 2,
In addition to the effects of the invention, the front and rear skeletal members and the vehicle width direction skeletal members are connected to each other by connecting the front and rear skeletal members and the vehicle width direction skeletal members at the rear one of the independent hollow legs separated from the front and rear of the suspension mount bracket. The part is designed to function as a drain passage, so if water enters along with the cooling air from the front end of the longitudinal frame member, it can be drained at the front side of the communicating part with the vehicle width direction frame member, and the battery can be discharged. The effect of preventing water from entering the frame can be obtained.

According to the fourth aspect of the present invention, in addition to the effects of the second and third aspects, the rear edge of the bottom wall of the longitudinal frame member to which the legs of the suspension mount bracket are communicatively connected is provided with an upper portion. Because the flanges that protrude from the front end of the front-rear skeletal member are provided, the cooling air circulating from the front end to the rear can be received by the flange and introduced from the legs into the vehicle width-direction skeletal member. Performance can be improved.

Further, in the case where the legs are separated and independent in the front and rear, in a portion where the front legs communicate with each other, if water drops enter the front end of the frame member in the front-rear direction together with the cooling air, the water drops are flanged. Thus, a function of separating water and water flowing down to the front leg is obtained, so that the effect of preventing water from entering the battery frame can be further enhanced.

According to the invention described in claim 5, according to claim 1,
In addition to the effects of the fourth to fourth aspects, since the hollow vehicle width direction frame member is a cross member that is connected and connected across the left and right front-rear direction frame members, the strength and rigidity of the vehicle body front portion can be further increased, and Since the cooling air can be introduced from the front-back direction frame member, the amount of cooling air introduced can be increased.

According to the invention of claim 6, according to claim 1,
In addition to the effects of the fourth to fourth aspects, since the hollow vehicle width direction frame member is a pair of left and right outriggers connecting the left and right front and rear direction frame members and the lower surface of the dash lower panel, the rigidity of the front part of the vehicle compartment can be increased. At the same time, since the ends of the left and right outriggers on the respective vehicle center sides are connected to the intake duct, cooling air can be introduced from the left and right longitudinal frame members, and the amount of cooling air introduced can be increased.

According to the invention of claim 7, according to claim 1,
In addition to the effects of the inventions of (1) to (6), since the blower unit is provided in the cooling air introduction passage in front of the intake port, the cooling air can be supplied into the battery frame as a forced air flow, and the influence of the ventilation resistance by the battery in the battery frame. Can be reduced, and the performance of introducing the cooling air can be further enhanced.

According to the invention described in claim 8, according to claim 1,
In addition to the effects of the seventh to seventh aspects, since the blower unit is connected and fixed to the frame member in the vehicle width direction, the layout of the blower unit can be simplified.

According to the ninth aspect of the present invention, an eighth aspect is provided.
In addition to the effects of the invention, the blower unit connected and fixed to the vehicle width direction frame member and the intake duct connected and fixed to the intake port at the front end of the battery frame are connected to each other by a flexible duct. The flexible duct can absorb the phase difference from the intake duct and facilitate the connection work, and the flexible duct can absorb the relative displacement between the frame member side and the battery frame side in the vehicle width direction due to torsion during vehicle running. In addition, it is possible to avoid the occurrence of stress concentration at the duct connection portion.

According to the tenth aspect of the invention, in addition to the effects of the first to ninth aspects, the intake port is formed on the lower side of the battery frame, and the exhaust port is formed on the upper side of the battery frame. The battery is formed to allow the cooling air to pass upward from the bottom of the battery and to be discharged, so that the battery can be cooled evenly by the cooling air passing from the bottom and rise inside the battery frame due to the heat generated by the battery. The directed hot air can be smoothly discharged from the exhaust port, and the cooling performance of the battery can be improved.

[0029]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a battery frame which is formed in a square shape having a bottom wall 2 and front, rear, left and right peripheral side walls 3 and accommodates a plurality of batteries B and is mounted on the lower side of the floor of a vehicle body. In the present embodiment, as shown in FIGS. 5 and 6, four rectangular batteries B are accommodated in contact with each other in the front-rear and left-right directions as small battery frames mounted on the lower side of the floor of the small vehicle body 10. The junction box J / B is formed at the rear side with a housing portion of the junction box J / B projecting rearward so that the junction box J / B can be housed together.

The battery frame 1 is made of a lightweight metal material such as aluminum, for example, and the bottom wall 2 and the peripheral side wall 3 are integrally formed by casting. A battery cover 4 made of a synthetic resin material is provided on the peripheral edge of the upper opening. The battery B and the junction box J · B are hermetically housed by fastening and fixing.

The battery frame 1 is mounted on the vehicle body floor 11
Is securely fastened and fixed to the lower surface of the floor frame member 12 provided on the lower surface of the vehicle by a fastening member such as a bolt (not shown).

The lower end of the front end of the battery frame 1 is provided with two intake ports 5 on the left and right, while the rear end of the battery cover 4 is provided with an exhaust port 6. As shown by the arrow in FIG.
The battery B and the junction box JB can be cooled by passing the junction box JB from the lower side to the upper side and discharging the gas from the exhaust port 6 to the outside.

An intake duct 7 made of a synthetic resin material is attached to the front end of the battery frame 1 so as to cover the intake port 5.

In the present embodiment, a flexible duct 8 having an intermediate portion formed in a bellows shape with the same material is attached to the front side of the intake duct 7.

Numeral 13 denotes a front side member as a longitudinal frame member disposed in the longitudinal direction on both left and right sides of a motor room at the front of the vehicle body. The front side member 13 has a rectangular cross section made of a lightweight metal material such as aluminum. Extruded in a hollow.

As shown in FIG. 3 in an enlarged manner, a joining flange 1 is provided on the outer upper edge and the rear end of the front side member 13.
3a and 13b are provided. The joining flange 13a is joined to a hood ridge panel (not shown), and the joining flange 13b is joined to the lower surface of the dash lower panel 14.

Reference numeral 15 denotes a vehicle width direction frame member connected to the front side member 13 in front of the battery frame 1. In this embodiment, similarly to the front side member 13, a lightweight metal material is used to extrude a hollow rectangular cross section. , And a front end of the cross member 15 is formed by a pair of left and right suspension mount brackets 21 and.
1 through the front side member 1 as described later.
3, 13 are connected.

A connection port 16 is formed in the center of the rear wall of the cross member 15, and the inlet 18 of the blower unit 17 is inserted and fitted into the connection port 16 to attach the blower unit 17. , The blower unit 1
7, the end of the flexible duct 8 is connected to the outlet 19, and the front side member 13, the suspension mount bracket 21, the cross member 15,
The blower unit 17, the flexible duct 8, and the intake duct 7 constitute a cooling air introduction passage 20 that takes in cooling air from the front end of the front side member 13 and introduces the cooling air into the battery frame 1.

Suspension mount bracket 21
Is provided with a bracket portion 22 for connecting and supporting a front suspension (not shown), and a hollow leg portion 23 having a rectangular cross section standing upright on the bracket portion 22.

In this embodiment, the leg 23 is connected to the front leg 23F.
And a rear leg portion 23R, which are separately and independently formed. A joining flange 23a extending to the left and right side edges of the upper end portion is joined to the left and right side walls of the front side member 13, respectively. It communicates with the front side member 13 through an opening 24 provided in the bottom wall.

A flange 23b extends from the rear edge of the upper end of each of the legs 23F and 23R. The flange 23b is brought into contact with the rear edge of the opening 24 so as to protrude into the front side member 13. I have.

The cross member 15 is joined by abutting both side end portions thereof to the inner side wall of the rear leg portion 23R through the connecting flange 15a, and is connected to the rear side of the cross member 15 through the opening 25 provided in the side wall. It communicates with the leg 23R.

At the lower end of the front leg 23F, for example, a drain port 26 penetrating below the bracket portion 22 is provided, and the front leg 23F is used as a drain passage.

According to the structure of the above embodiment, by driving the blower unit 17, cooling air is taken in from the front end of the front side member 13, and the cooling air flows backward in the front side member 13. And through the leg 23R on the rear side of the suspension mount bracket 21 and from the leg 23R through the cross member 15, and from the blower unit 17 via the flexible duct 8 and the intake duct 5 to the battery. The battery 1 is introduced into the battery frame 1 through an intake port 5 of the frame 1.

The cooling air introduced into the battery frame 1 is supplied to the battery B and the junction box J · B.
Is discharged from the exhaust port 6 at the rear end of the battery cover 4 to the outside, so that the cooling air flowing from the lower side can evenly spread the battery B and the junction box JB. In addition to being able to cool, it is possible to smoothly discharge hot air rising upward in the battery frame 1 by the heat generated by the battery B from the exhaust port 6, so that the battery B and the junction box J · B
Cooling performance can be improved.

In particular, in the present embodiment, since the vehicle width direction frame member is configured as a cross member that is connected and connected across a pair of left and right front side members 13, 13, the left and right front side members 13 are separated from each other. In addition to being able to introduce the cooling air, the cooling air can be introduced by using the ram pressure at the front of the vehicle body during traveling of the vehicle, so that the amount of the introduced cooling air can be increased.

The flange 23b projects from the rear edge of the opening 24 on the rear side of the bottom wall of the front side member 13 to which the rear leg 23R communicates. The cooling air circulating backward from the front end portion can be received by the flange 23b and introduced into the cross member 15 from the leg 23R, so that the cooling air introduction performance can be improved.

During running on rainy weather, etc., there is a possibility that water droplets may enter the front side member 13 together with the cooling air from the front end of the front side member 13.
Since the front leg 23F exists as a drain passage at the front of the 3R, even if water invades, the water can be drained to the outside by the front leg 23F immediately before the cross member 15 even if the water enters. The effect of preventing water from entering the frame 1 can be obtained.

In addition, the front opening 23 of the bottom wall of the front side member 13 with which the front leg 23F communicates.
The flange 23b is also protrudingly arranged on the rear edge, so that even if water droplets are mixed in the cooling air, the water droplets can be received by the flange 23b and flow down to the leg portion 23F, so that the water / water separation action can be obtained. Therefore, the water intrusion prevention effect can be further enhanced.

Here, as described above, the intake duct 7 has a length that connects the intake port 5 at the front end of the battery frame 1 and the cross member 15 adjacent to the front end of the front end of the battery frame 1. In addition, the intake duct 7 can be made as small as possible, which is advantageous in terms of cost. Of course, unlike the conventional structure in which the intake duct is arranged along the dash panel, it affects the space in the motor room and the passenger compartment. , The duct layout can be easily performed, and especially when used in a small car as in the present embodiment, the degree of freedom of design can be increased.
The cabin can be enlarged.

Further, since the blower unit 17 is connected and fixed to the cross member 15, the layout can be easily arranged, and the cooling air can be supplied from the front of the intake port 5 of the battery frame 1 as a forced air. From
The influence of the ventilation resistance due to the battery B, the junction boxes J and B in the battery frame 1 can be reduced, and the performance of introducing the cooling air can be further improved.

On the other hand, apart from such an effect on the wind guiding into the battery frame 1, the front side members 13, 13 are connected to the left and right front side members 13, 13 as vehicle width direction frame members. In addition to being configured as a cross member 15 that is connected over the straddle, the cross member 15 communicates with the front side member 13 via the hollow leg 23 </ b> R of the suspension mount bracket 21 connected to the front side member 13. Connect the front side member 13 and cross member 15
Can be solidified with a closed section structure,
The strength rigidity of the front part of the vehicle body can be further increased, and the suspension support rigidity can be increased.

Further, since the hollow cross member 15 exists in the front side of the battery frame 1 in the vehicle width direction, the cross member 15 can function as a protector to protect the battery during a frontal collision of the vehicle. There are advantages that can be done.

Further, the vehicle body floor 1 of the battery frame 1
1 When mounted on the lower side, the intake duct 7 attached to the front end of the battery frame 1 and the blower unit 17 attached to the cross member 15 can be connected by the flexible duct 8 attached to the intake duct 7. The phase difference between the blower unit 17 and the intake duct 7 can be absorbed by the flexible duct 8, so that the connection operation can be easily performed.

Also, due to the presence of the flexible duct 8, the cross member 1 is twisted due to the torsion of the vehicle body during running of the vehicle.
The relative displacement between the side of the battery frame 5 and the side of the battery frame 1 can be absorbed by the flexible duct 8, so that stress concentration at the duct connecting portion can be avoided.

FIG. 4 shows a second embodiment of the present invention. In this embodiment, the cross member 15 is used as the vehicle width direction skeletal member in the first embodiment. A pair of left and right outriggers 27 that reinforce the lower panel 14 are used effectively for a part of the cooling air introduction passage 20.

The outrigger 27 is formed to have an inverted hat shape in cross section, and a joining flange 27a at the upper edge thereof is joined to the lower surface of the dash lower panel 14 to form a rectangular hollow closed section extending in the vehicle width direction. The end on the vehicle body side is connected to the rear leg 23R of the suspension mount bracket 21, and is connected to the front side member 13 via the rear leg 23R.

The closed end of each outrigger 27 on the vehicle center side is connected to the intake duct 7 on the battery frame 1 side.
In this embodiment, a blower unit 17 provided with inlets 18 on both sides is disposed between the end portions of the outriggers 27 on the vehicle center side, and these inlets 18 are connected to the corresponding outriggers. The blower unit 27 is connected to the intake duct 7 to form a cooling air introduction passage 20.

Although the intake duct 7 and the outlet 19 of the blower unit 27 are not shown in FIG. 4, the connection of the intake duct 7 to the outlet 19 of the blower unit 27 via the flexible duct 8 is not described in the first embodiment.
This is the same as the embodiment.

Therefore, according to the structure of the second embodiment, the pair of right and left outriggers 27 are joined to the rear leg 23R of the suspension mound bracket 21 joined to the front side member 13 and the lower surface of the dash lower panel 14. Since it is arranged to form a closed cross section, the strength of the dash lower panel 14 can be increased to increase the rigidity of the front part of the vehicle compartment, and the same effect on the strength and rigidity of the front part of the vehicle body as in the first embodiment can be obtained. , And the effect on the wind guiding performance to the battery frame 1 can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is an explanatory sectional view of the first embodiment of the present invention.

FIG. 3 is an exploded perspective view of a connection portion between a longitudinal frame member and a vehicle width direction frame member according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a second embodiment of the present invention.

FIG. 5 is a schematic side view of a vehicle employing the structure of the present invention.

FIG. 6 is a view taken in the direction of arrow A in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery frame B Battery 5 Inlet 6 Exhaust port 7 Intake duct 8 Flexible duct 10 Car body 11 Car body floor 12 Floor skeletal member 13 Front and rear skeletal member 14 Dash lower panel 15 Car width direction skeletal member (cross member) 17 Blower unit 20 Cooling air Introductory passage 21 Suspension mount bracket 23 Leg 23F Front leg 23R Rear leg 23b Flange 24 Front-back direction frame member bottom wall opening 26 Drain outlet 27 Outrigger

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01M 10/50 H01M 10/50 5H115 F term (Reference) 3D003 AA01 AA04 AA07 AA08 AA09 AA14 BB16 CA05 CA14 CA18 DA01 DA29 3D035 AA03 BA01 3D038 BA06 BA09 BA19 BB09 BC09 BC16 BC24 5H020 AA04 AS06 AS11 CC04 CC19 CV01 KK13 5H031 AA09 KK08 5H115 PG04 PI13 PI29 PU01 TU12 UI29 UI35

Claims (10)

[Claims] An intake port is provided at a front end of a battery frame which is hermetically accommodated and has a plurality of batteries sealed therein and fixedly fastened to a floor frame member on a lower surface of a vehicle body floor, and an exhaust port is provided at a rear end of the battery frame. In the structure in which the air for battery cooling is introduced into the battery frame, a pair of left and right hollow front-rear frame members provided at the front of the vehicle body in front of the battery frame disposing portion has a hollow vehicle width direction. The skeletal members are communicatively connected, and the vehicle width direction skeletal member and the intake port of the battery frame are communicatively connected by an intake duct. The cooling air introduction passage is formed between the longitudinal frame member, the vehicle width direction skeletal member, and the intake duct. A battery cooling structure for an electric vehicle, comprising: 2. A suspension mount bracket having a hollow leg is provided at each connecting portion between the pair of longitudinal frame members and the vehicle width direction frame member, and the legs are attached to the bottom of the longitudinal frame member. 2. The battery cooling structure for an electric vehicle according to claim 1, wherein the wall portion communicates with the vehicle width direction skeletal member and the leg portions communicate with each other. 3. The suspension mount bracket has two front and rear legs which are separated and independent, and the vehicle width direction skeletal member is connected to the front / rear direction skeletal member via the rear leg portion while being connected to the front side. 3. The battery cooling of an electric vehicle according to claim 2, wherein the legs are connected to each other at a bottom wall portion of the longitudinal frame member, and a drain port is provided at a lower end of the front legs. Construction. 4. A rearwardly projecting flange at the rear edge of the opening of the bottom wall of the longitudinal frame member to which the legs of the suspension mount bracket are connected to communicate with each other. A battery cooling structure for the electric vehicle according to the above. 5. The battery cooling structure for an electric vehicle according to claim 1, wherein the vehicle width direction skeletal member is a cross member communicatively connected across the left and right front-rear skeletal members. 6. A pair of left and right outriggers for connecting the left and right longitudinal frame members to the lower surface of the dash lower panel, and the vehicle center side ends of these outriggers are connected to the intake duct. The battery cooling structure for an electric vehicle according to any one of claims 1 to 4, wherein: 7. The electric device according to claim 1, wherein a blower unit for forcibly introducing cooling air into the battery frame is provided in a cooling air introduction passage in front of the air inlet. Automotive battery cooling structure. 8. A blower unit for forcibly introducing cooling air into the battery frame is fixedly connected to the vehicle width direction frame member, and an intake duct is connected to the vehicle width direction frame member via the blower unit. The battery cooling structure for an electric vehicle according to any one of claims 1 to 7, wherein: 9. The blower unit and the intake duct are connected to each other by a flexible duct.
3. The battery cooling structure for an electric vehicle according to claim 1. 10. An intake port is formed in a lower portion of the battery frame, while an exhaust port is formed in an upper portion of the battery frame so that cooling air is allowed to pass upward from a lower portion of the battery to be discharged. Claim 1 characterized by having done
The battery cooling structure for an electric vehicle according to any one of claims 9 to 13.