JP3284849B2 - Battery storage structure for electric vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery storage structure for an electric vehicle.

[0002]

2. Description of the Related Art As a conventional battery storage structure of an electric vehicle, for example, as shown in Japanese Patent Application Laid-Open No. 5-193376, a storage box containing a plurality of batteries is mounted below a floor panel. In addition, an air inlet is provided on the front side of the storage box, and an air discharge unit provided with a fan is provided on the rear side to introduce cooling air into the storage box to cool the battery.

[0003]

The battery can be cooled by introducing cooling air into the storage box and discharging it from the rear air discharging portion, and also allows H ₂ gas generated from the battery to the outside. Although it can be discharged, since the air intake is open to the entire surface of the storage box and the height above the ground is set low, there is a possibility that water may enter the storage box from the air intake during traveling in rainy weather,
It is necessary to take complicated measures to prevent water intrusion.

Accordingly, the present invention has no danger of water intrusion into the battery storage unit without taking any particularly complicated measures to prevent water intrusion, and can greatly increase the amount of cooling air to be introduced. ₍₂₎ An object of the present invention is to provide a battery housing structure of an electric vehicle that can efficiently discharge gas.

[0005]

According to a first aspect of the present invention, a plurality of batteries are hermetically stored under the floor panel, an air inlet is provided at a front side of the battery storage portion, and an air intake is provided at a rear side. In the structure provided with the discharge portion, an intake duct that rises and covers substantially the entire surface of the dash panel on the motor room side is provided, and an intake duct that opens upward in the motor room is disposed, and the intake duct is connected to the air intake. It is characterized by.

According to the first aspect of the present invention, the intake duct is connected to the air intake in front of the battery housing, and the intake duct rises along the dash panel and opens upward in the motor room. As a result, it is possible to reliably prevent splash or the like from entering, and it is possible to introduce cooling air without water entering the battery storage unit.

Further, since the intake duct is disposed so as to cover almost the entire surface of the dash panel, the duct cross-sectional area can be increased, the amount of cooling air introduced can be greatly increased, and the cooling efficiency of the battery and H _{(2) The} gas discharge efficiency can be improved.

In addition, since the intake duct is provided so as to cover substantially the entire side surface of the dash panel on the motor room side, heat and sound insulation effects can be obtained by the intake duct, and the living environment of the vehicle compartment is improved. Can be further improved, and a cushioning effect can be exerted at the time of a frontal collision of the vehicle.

According to a second aspect of the present invention, the intake duct according to the first aspect includes a component escape hole penetrated in the front-rear direction and is separated from the motor duct and the vehicle compartment through the dash panel. The functional component disposed over the component escape hole is disposed.

According to the second aspect of the present invention, since the various functional components penetrating the dash panel are disposed through the component escape holes of the intake duct, the layout of these functional components may be slightly hindered. Further, the duct layout of the intake duct is also facilitated.

According to a third aspect of the present invention, an intake box having an upward opening and a flange at the periphery thereof is connected to the air intake according to the first and second aspects, while a flange is formed at a periphery of a lower end portion of the intake duct. The intake duct and the intake box are fastened and fixed in the vertical direction by abutting these flanges.

According to the third aspect of the invention, since the intake duct and the intake box are fastened and fixed in the vertical direction by abutting their flanges, the mounting direction of the battery on the lower side of the floor panel and the attachment of the intake duct. In the same direction, the air intake duct can be attached in the process of mounting the battery on the floor panel, and the workability can be improved.

According to a fourth aspect of the present invention, a guide portion is provided at the lower end of the intake duct according to the third aspect so as to protrude downward from a flange on a peripheral edge thereof and to be fitted into an intake box.

According to the fourth aspect of the present invention, since the guide portion of the intake duct fits into the intake box, the intake duct can be temporarily fixed, and the connection work between the intake duct and the intake box can be further improved. Can be improved.

According to a fifth aspect of the present invention, a seal member is interposed between the connection portion between the intake box and the air intake and the flange between the intake box and the intake duct. The peripheral edge of the connection between the intake box and the air inlet, and the flange at the peripheral edge of the lower end of the intake duct are each formed by bending the protector edge to hold the seal material and cover the periphery of the interposed portion of the seal material. Features.

According to the fifth aspect of the present invention, the seal material can ensure the sealing properties of the connection between the intake box and the air intake and the connection between the intake box and the intake duct, and the seal material can be used as a protector edge. And the surrounding area is covered, thereby avoiding direct impact of the splash on the sealing material, so that the sealing performance can be further improved.

Further, since the sealing member is held by the protector edge to prevent the sliding movement, the workability of connecting the intake box and the intake duct can be improved without impairing the sealing performance.

[0018]

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

1 to 6, reference numeral 1 denotes a floor panel 12.
Shows a battery frame fixedly mounted on the lower side, and a plurality of lower beams 4 are joined and arranged orthogonally on a center member 3 joined in a front-rear direction on a bottom plate 2 and straddle the front and rear lower beams 4. A plurality of batteries 5 are mounted and fixed, and a ventilation path 6 is formed between the bottom plate 2 and the batteries 5.

In this embodiment, a junction box 7, which is a high-power component electrically connected to the battery 5, is mounted and fixed in the front side of the battery frame 1.

An upper cover 8 is fixed to the upper edge of the battery frame 1 by bolts and nuts (not shown).
The battery 5 and the junction box 7 are hermetically stored.

At a substantially central portion of the upper surface of the junction box 7, there is provided a safety plug attaching / detaching portion 7a electrically connected to a control unit (not shown), which is a strong electric component on the motor room side, via a strong electric harness 9. Reference numeral 7a penetrates the upper cover 8 and protrudes upward.

The safety plug attaching / detaching portion 7 of the upper cover 8
The portion through which a has penetrated is, of course, sealed with a sealing material.

A substantially lower half of the front side of the battery frame 1 is formed with an air intake 10 having a size substantially corresponding to the inner width thereof and penetrating in the front-rear direction.

On the other hand, on the rear side of the battery frame 1, specifically, on the rear side of the upper cover 8, there is provided an air discharge section 11 having a fan 12. The cooling air flowing into the battery 5 is vertically circulated through each battery 5 and discharged from the air discharge unit 11 so that the battery 5 can be cooled.

The battery frame 1 has a plurality of batteries 5 and a junction box 7 mounted thereon and fixed as described above, and is sealed and stored by an upper cover 8. An opening 13 is formed in the floor panel 12 so as to penetrate the safety plug attaching / detaching portion 7a of the junction box 7 so as to protrude toward the passenger compartment side. I have.

The floor panel 12 is provided with a plug cover 14 having a lid 15 which can be opened and closed so as to cover the safety plug attaching / detaching portion 7a. The lid 15 is opened and a safety plug (not shown) of the strong electric harness 9 is opened. Can be attached to and detached from the safety plug attaching / detaching portion 7a in the vehicle interior.

In this embodiment, an intake box 18 in which connection ports 19 and 20 are set on the elbow with a phase difference of 90 degrees is connected to the entire surface of the air inlet 10 of the battery frame 1. .

At the periphery of the connection ports 19 and 20, a flange 19 is provided.
a, 20a are formed, and the plug 19a of the connection port 19 is formed.
Is fastened and fixed to the peripheral edge of the front surface of the air inlet 10 via a sealing material 25 with bolts and nuts (not shown), and the connection port 20 is arranged upward.

The plug 19a of the connection port 19 has a sealing material 2
5, a protector edge 19b that covers the periphery of the interposed portion of the sealing material 25 is bent.

An intake duct 21 is connected to the connection port 20 of the intake box 18 facing upward.

The intake duct 21 is made of a suitable synthetic resin material having excellent heat resistance, is large enough to cover substantially the entire motor room side of the dash panel 17, and has a shape that rises along the front surface of the dash panel 17. The upper end opening 22 is arranged in the upper part of the motor room.

The dash panel 17 includes, in addition to the harnesses such as the strong electric harness 9 described above, various functional parts such as a steering shaft (not shown), various pipings, and brake accessories, which cover the vehicle room and the motor room. Because of the through-hole arrangement, the intake duct 21 penetrates and separates component escape holes 23 at positions corresponding to these functional components in the front-rear direction, and through the component relief holes 23, the functional components such as the strong electric harness 9 and the like. Is arranged.

A flange 21a is formed on the lower peripheral edge of the intake duct 21. The flange 21a is brought into contact with the flange 20a of the connection port 20 of the intake box 18 via a sealing material 25 to form a bolt / bolt (not shown). Fastened and fixed with nuts.

On the flange 21a, a protector edge 21b which holds the sealing material 25 and covers the periphery of the interposed portion of the sealing material 25 is formed by bending.

The lower end of the intake duct 21 projects below the flange 21a, and
A guide portion 24 that fits into the connection port 20 is extended, and by fitting the guide portion 24 into the connection port 20, the intake duct 21 can be positioned and temporarily fixed, so that the connection work of the intake duct 21 is easy. It is possible to do it.

According to the structure of the above embodiment, the cooling air is taken in from the upper part of the motor room through the upper end opening 22 of the intake duct 21, and as shown by arrows in FIG. Air intake 1
The air flows into the ventilation passage 6 formed between the bottom surface of the battery 5 and the bottom plate 2 via the line 0.

Each battery 5 is provided with a plurality of ventilation holes (not shown) on the upper and lower surfaces, and cooling air flowing into the ventilation passage 6 flows upward through these ventilation holes and escapes into the upper space of the battery frame 1. The battery 5 is discharged to the outside from the air discharge portion 11 on the rear side, thereby cooling the batteries 5 and discharging the H ₂ gas generated from the batteries 5.

Here, as described above, the battery frame 1
An intake duct 21 is connected to the air intake 10 of the dash panel 17.
And the upper end opening 22 is arranged on the upper side of the motor room, so that splash intrusion can be reliably avoided.

In the present embodiment, in particular, between the flange 19 a of the connection port 19 of the intake box 18 and the peripheral edge of the front surface of the air intake 10, and the intake box 1
The seal member 25 is interposed between the flange 20a of the connection port 20 of FIG. 8 and the flange 21a of the intake duct 21 to ensure the sealing performance of each connection portion. Protector edges 19b, 20b that hold sealing material 25 and cover the periphery of the interposed portion of sealing material 25
Is bent, it is possible to thoroughly prevent water from entering the battery frame 1 without the seal member 25 being directly hit by the splash, and it is possible to perform good cooling air introduction.

The intake duct 21 is provided on the dash panel 1.
7 is formed so as to cover substantially the entire surface thereof, the duct cross-sectional area can be increased, the amount of cooling air introduced can be greatly increased, and the cooling efficiency of the battery 5 and the efficiency of discharging H ₂ gas can be improved. be able to.

Further, since the intake duct 21 is disposed so as to cover substantially the entire side surface of the dash panel 17 on the motor room side, the heat shielding and sound insulating effects are obtained by the intake duct 21 so that the passenger compartment is provided. The living environment of the vehicle can be further improved, and the intake duct 21
Thus, a buffering effect can be obtained.

Even if the intake duct 21 is provided so as to cover substantially the entire surface of the dash panel 17 as described above, a required portion thereof is formed by penetrating through the component escape hole 23 in the front-rear direction. Therefore, various functional components such as the high-power harness 9 penetrating the dash panel 17 can be disposed through the component relief holes 23, and the layout of these functional components is not hindered. Further, the duct layout of the intake duct 21 can be facilitated.

On the other hand, apart from such an effect, as described above, the flange 1 of the connection port 19 of the intake box 18
9a and the periphery of the flange 21a of the intake duct 21 have protector edges 19b and 21 for holding the sealing material 25.
Since b is bent, the connecting work between the intake box 18 and the battery frame 1 and the connecting work between the intake duct 21 and the intake box 18 can be performed without impairing the sealing performance by preventing the sealing material 25 from shifting. It can be done easily.

Further, the intake duct 21 has a flange 21a at a lower peripheral edge thereof abutting on a flange 20a of the upward connection port 20 of the intake box 18, and is fastened and fixed from above and below by bolts and nuts (not shown). Therefore, the connection work direction matches the mounting direction of the battery frame 1 below the floor panel 12, and the intake duct 21 can be mounted in the mounting process of the battery frame 1 below the floor panel 12. Therefore, workability can be improved.

In particular, since the guide portion 24 which fits into the connection port 20 of the intake box 18 is extended at the lower end of the intake duct 21, the fitting of the guide portion 24 and the connection port 20 causes the intake duct 21 to be fitted. Since the positioning and temporary fixing of the air intake duct 21 can be performed, the work of connecting the intake duct 21 can be further improved.

As described above, the intake duct 21 is basically provided with the flange 20 a of the connection port 20 of the intake box 18.
Is securely fastened by bolts and nuts,
The upper part of the intake duct 21 may be supplementarily fixed to the dash panel 17 by fastening means such as bolts and nuts or clips, so as to prevent steadying.

In the above embodiment, the intake duct 21 is fixedly connected to the air intake 10 of the battery frame 1 via the intake box 18. However, the intake duct 21 is extended to the portion corresponding to the intake box 18. The air intake duct 21 is formed integrally with the air intake 10
Needless to say, the connection may be fixed directly.

[0049]

As described above, according to the present invention, the following effects can be obtained. According to claim 1, an air intake duct is connected to an air intake provided on the front side of the battery storage unit,
Since the intake duct rises along the dash panel and opens upward in the motor room, it is possible to reliably prevent splashes and the like from entering, and therefore,
Even without taking a complicated waterproof structure, it is possible to introduce cooling air while avoiding intrusion of water into the battery storage section, thereby achieving a significant cost reduction.

Further, since the intake duct is disposed so as to cover substantially the entire surface of the dash panel on the motor room side, the duct cross-sectional area can be increased, and the amount of cooling air introduced can be greatly increased, thereby cooling the battery. The efficiency and the H ₂ gas discharge efficiency can be improved.

Furthermore, since the intake duct covers almost the entire side surface of the dash panel on the motor room side as described above, the heat intake and sound insulation effects are obtained by the intake duct, and the living environment of the vehicle compartment is further improved. In addition to the above, at the time of a frontal collision of the vehicle, a cushioning effect is obtained by the intake duct, so that the deformation of the dash panel toward the cabin side can be suppressed to enhance the safety.

According to the second aspect, since the various functional components penetrating through the dash panel are disposed through the component escape holes provided in the intake duct, the vehicle extends through the dash panel and extends between the vehicle compartment and the motor room. It does not hinder the layout of the functional components to be arranged, and the duct layout of the intake duct can be easily performed.

According to the third aspect, the intake box connected to the air intake of the battery frame and the intake duct are fastened and fixed in the vertical direction by abutting their flanges. Since the mounting direction matches the mounting direction of the intake duct, the intake duct can also be mounted in the process of mounting the battery on the floor panel, thereby improving workability.

According to the fourth aspect, the guide portion is extended at the lower end of the intake duct, and by positioning this guide portion in the intake box, positioning and temporary fixing of the intake duct can be performed. Therefore, the connection work between the intake duct and the intake box can be further improved.

According to the fifth aspect, the sealing properties of the connection between the intake box and the air intake and the connection between the intake box and the intake duct can be ensured by the seal material, and the seal material is held by the protector edge. As a result, the surrounding area is covered, so that direct impact of the splash on the sealing material can be avoided, and the sealing performance can be further improved.

Further, since the sealing member is held by the protector edge and prevented from shifting, the workability of connecting the intake box and the intake duct can be improved without impairing the sealing performance.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a sectional view taken along the line AA in FIG. 1;

FIG. 4 is a sectional view showing the periphery of a connection portion of the intake box.

FIG. 5 is a perspective view of an intake box.

FIG. 6 is a perspective view of an intake duct.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery frame 5 Battery 9 Functional parts 10 Air intake 11 Air exhaust part 12 Floor panel 17 Dash panel 19 Intake box 21 Intake duct 21a Flange 19b, 21b Protector edge 23 Parts escape hole 24 Guide part 25 Seal material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-193376 (JP, A) JP-A-7-215070 (JP, A) JP-A-7-164893 (JP, A) JP-A-7-215 1973 (JP, A) JP-A-5-193367 (JP, A) JP-A-8-244473 (JP, A) JP-A-7-30450 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60K 1/04

Claims (5)

(57) [Claims] In a structure in which a plurality of batteries are hermetically stored under a floor panel, an air intake is provided at a front side of the battery storage section, and an air exhaust section is provided at a rear side of the battery storage section. A battery storage structure for an electric vehicle, comprising: an intake duct that rises over substantially the entire room side and opens upward in the motor room, and the intake duct is connected to the air intake. 2. An air intake duct having a component escape hole penetrating in a front-rear direction thereof and being separated from a motor room and a vehicle compartment through a dash panel. The battery storage structure for an electric vehicle according to claim 1, wherein the battery storage structure is disposed through the escape hole. 3. An intake box, which opens upward to the air intake and has a flange on the periphery, is connected to the intake box, and a flange is formed on the periphery of the lower end of the intake duct.
3. The battery housing structure for an electric vehicle according to claim 1, wherein the intake duct and the intake box are fastened and fixed in a vertical direction by abutting the flanges. 4. The battery housing structure for an electric vehicle according to claim 3, wherein a guide portion protruding below a peripheral flange of the lower end of the intake duct and extending into the intake box is extended. 5. A connecting portion between the intake box and the air intake, and a seal member interposed between the intake box and the flange of the intake duct, and a periphery of a connecting portion between the intake box and the air intake, 5. The battery for an electric vehicle according to claim 3, wherein a seal member is held on a flange at a lower peripheral edge of the intake duct, and a protector edge covering the periphery of the interposed portion of the seal member is bent. Storage structure.