JP5557856B2 - Cooling structure for vehicle battery unit - Google Patents

Description

  The present invention relates to a cooling structure for a vehicle battery unit effective for taking in cooling air for cooling a battery unit applied to a vehicle such as an electric vehicle or a hybrid vehicle.

  For example, in a hybrid vehicle, a battery unit, which is a drive energy source for an electric motor, is mounted in a rear seat back portion of a rear seat, in a luggage space, or under the floor thereof. Since the battery unit is a heat generating component that generates heat when charging and discharging are performed, cooling is required to maintain battery performance. It is desirable to cool the battery unit by efficiently cooling the captured cooling air by sending it with a small ventilation resistance. Conventionally, the air in the vehicle compartment has been introduced from the air inlet provided near the battery unit near the rear seat. Is taken in by a cooling fan, and the air is supplied to the battery as cooling air.

  However, if the air inlet opening in the passenger compartment is blocked by passengers or luggage, sufficient cooling air cannot be supplied to the battery unit, the temperature of the battery unit rises, and the battery characteristics deteriorate. There is a possibility that problems such as shortening the service life may occur. In order to avoid such a problem of intake port closing, in the cooling structure for a vehicle battery unit described in Patent Document 1, as shown in FIG. 8, an intake duct 102 that takes in cooling air to the battery 100 via a fan 101 is used. However, it extends in a direction substantially perpendicular to the floor surface of the luggage space 105 and extends above the tonneau cover 103, and the intake side 104 of the intake duct 102 forms a side wall surface of the luggage space 105. 106. Further, a part of the upper end of the intake duct 102 is extended in the lateral direction, and another intake port 107 is formed in the extended part.

  Moreover, in the battery cooling device for driving | running | working described in patent document 2, a passenger | crew's seating state is acquired by the seating state acquisition means, and an inlet-port variable mechanism changes the position of an inlet port based on this seating state. The position is separated from the seating position of the occupant. This will reduce the discomfort given to the occupant due to the cooling fan noise, and prevent adverse effects on the battery, such as spilling liquid on the air intake and insufficient air flow due to the air intake being blocked. I have to.

Japanese Patent No. 4114478 Japanese Unexamined Patent Publication No. 2007-220659

  By the way, in a large vehicle, as described in Patent Document 1, two intake ports 104 and 107 can be arranged in a luggage side trim 106 provided at the rear of the rear seat, but a quarter window is provided on the upper side surface of the luggage space. Such a vehicle cannot be applied to a relatively small vehicle. Further, in a small vehicle, it is difficult to apply an intake port variable mechanism that changes the position of the intake port based on the seating state as described in Patent Document 2.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to provide cooling air from an emergency intake port even if the intake port is blocked in a vehicle having a window on the rear side. An object of the present invention is to provide a cooling structure for a vehicle battery unit that can be taken in, supplied to a battery, and cooled to prevent deterioration of battery characteristics and adverse effects on life.

In order to achieve the above object, the invention according to claim 1 includes a battery unit (for example, a battery unit 11 in an embodiment described later) mounted on a vehicle (for example, a vehicle 10 in an embodiment described later), an intake side, and the like. An intake duct having an opening (for example, an intake side opening 13 in an embodiment described later) and extending toward the battery unit and supplying air in the vehicle interior to the battery unit as cooling air (for example, described later) An air intake duct 12) in the embodiment and an interior member (for example, a side lining 15 in an embodiment described later) attached to the rear side surface of the vehicle so as to cover the air intake side opening of the air intake duct, An intake grill (for example, an embodiment described later) in which a plurality of intake holes (for example, an intake hole 18 in an embodiment described later) is formed. Intake grill 19), a cooling fan for taking cooling air into the intake duct (for example, a cooling structure for a vehicle battery unit comprising, a cooling fan 14) will be described in the exemplary embodiment in,
The intake grill forms a main intake port (for example, a main intake port 20 in an embodiment described later), and
A sub-air intake (for example, described later) having an opening area smaller than that of the intake grill is formed at a mating portion between a window (for example, a quarter window 16 in the embodiment described later) and the interior member disposed on the rear side surface of the vehicle. A cooling structure for a vehicle battery unit, characterized in that a sub-intake port 30) in the embodiment is formed.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the cooling air sucked from the main intake port and the auxiliary intake port is supplied to the battery unit through the same intake duct. It is characterized by

In addition to the configuration of claim 1 or 2, the invention according to claim 3
The interior member forms a window frame of the window (for example, a window frame 17 in an embodiment described later),
The intake grill is disposed on a substantially horizontal plane (e.g., a substantially horizontal plane 17a in an embodiment described later) of the interior member located immediately below the window from the front to the center of the window.
The auxiliary air inlet is formed at a mating portion between the upright portion of the interior member (for example, an upright portion 17b in an embodiment described later) and the window, which rises rearward from the substantially horizontal plane. To do.

  In the invention according to claim 4, in addition to the configuration of claim 3, the auxiliary intake port is a notch provided at the window side end of the interior member (for example, a notch 15a in an embodiment described later). ) And the window (for example, a gap C in an embodiment described later).

  According to a fifth aspect of the invention, in addition to the configuration of the third aspect, the sub-intake port is formed by an air hole provided in the interior member (for example, an air hole 15b in an embodiment described later). Features.

In addition to the structure of any one of Claims 1-5, the invention which concerns on Claim 6 is
The window is fixed to a shelf (for example, an air hole shelf 6a in an embodiment described later) formed by bending the vehicle body toward the passenger compartment.
On the opposite side of the shelf from the window, a reinforcing member (for example, a reinforcing member 31 in an embodiment described later) is attached,
The cooling air sucked from the auxiliary air intake port passes through a gap (for example, a gap D in an embodiment described later) formed by the shelf and the back surface of the interior member, and the back surface of the reinforcing member and the interior member. Is introduced into the intake side opening from a space formed by (for example, a space S2 in an embodiment described later).

  According to a seventh aspect of the present invention, in addition to the configuration of any one of the second to sixth aspects, the negative pressure acting on the air intake duct and the communication between the auxiliary air intake port and the air intake duct are blocked during normal operation. And an elastic member (for example, an elastic member 32 in an embodiment described later) that allows communication between the auxiliary air inlet and the air intake duct when the air pressure exceeds a predetermined value.

  According to an eighth aspect of the present invention, in addition to the configuration of the seventh aspect, the elastic member includes the gap between the window and the interior member, or the shelf of the vehicle body and the back surface of the interior member. It is attached to the gap formed by

  In addition to the structure of any one of claims 1 to 8, the invention according to claim 9 is provided with a sound absorbing material (for example, a sound absorbing material in an embodiment described later) on the back side of the interior member in the vicinity of the auxiliary air inlet. 33) is affixed.

  In the invention according to claim 10, in addition to the configuration of any one of claims 6 to 9, a sound absorbing material (for example, a sound absorbing material 34 in an embodiment described later) is attached to the shelf. Features.

  According to the first aspect of the present invention, in a vehicle having a window on the rear side, even if the main intake port is blocked, the auxiliary intake port functions as an emergency intake port and The cooling air can be taken in and supplied to the battery unit to ensure the battery cooling performance. Thereby, the abnormal temperature rise of a battery unit can be prevented, and the deterioration of a battery characteristic and the bad influence on a lifetime can be prevented. Further, the auxiliary intake port can be formed while maintaining the appearance of the vehicle interior.

  According to the invention of claim 2, the space occupied by the air intake duct can be reduced, and the air intake duct capable of supplying an air amount necessary and sufficient for cooling the battery unit is provided even in a small vehicle in which the space is restricted. can do.

  According to the invention of claim 3, even in a small vehicle having a small installation space, the main intake port having a large opening area can be provided. Further, the emergency auxiliary air inlet can be arranged along the substantially vertical plane, and the possibility of being blocked by the occupant or the article can be greatly reduced. As a result, the amount of cooling air necessary for battery cooling can be ensured even in an emergency where the main air inlet is blocked. In addition, the air sucked from the auxiliary air intake port can be sucked in low-temperature air instead of high-temperature air such as underfoot or trunk seat back, so that the battery can be effectively cooled. it can. In addition, since the auxiliary intake port is a gap formed at the joint portion between the interior member and the window, it is possible to provide an attractive intake port without increasing the number of parts.

  According to the inventions of claims 4 and 5, it is possible to form a sub-intake port that is excellent in appearance at low cost without using dedicated parts.

  According to the sixth aspect of the present invention, the intake duct for communicating the auxiliary intake port and the intake side opening of the intake duct becomes unnecessary, and the number of parts can be reduced and the cost can be suppressed.

  According to the seventh aspect of the present invention, when the negative pressure generated in the intake duct due to the main intake opening being blocked exceeds a predetermined value, the elastic member is elastically deformed, and the auxiliary intake opening and the intake opening of the intake duct are , And the cooling air in the passenger compartment can be taken in from the auxiliary air intake to cool the battery. In normal operation (when the main intake port is open), the elastic member blocks the communication between the auxiliary intake port and the intake-side opening, so that no intake noise is generated from the auxiliary intake port. There is no risk of discomfort.

  According to the invention of claim 8, the elastic member can be arranged without affecting the appearance of the room, and a clean room can be obtained.

  According to the ninth and tenth aspects of the present invention, it is possible to reduce the intake sound of the air taken in from the auxiliary intake port by absorbing the sound with the sound absorbing material, thereby making the vehicle interior quiet. Moreover, this can prevent discomfort given to the occupant.

1 is a schematic side view of a hybrid vehicle equipped with a cooling structure for a vehicle battery unit according to a first embodiment of the present invention. It is the perspective view which looked at the inlet provided in the quarter window vicinity from the vehicle interior side. (A) is a partially broken perspective view taken along arrow III in FIG. 2, (b) is an enlarged sectional view in an emergency of a portion surrounded by A in FIG. 3 (a), and (c) is FIG. 3 (a). It is an expanded sectional view at the normal time of the part enclosed by A in FIG. It is a side view which removes an interior member from the vehicle interior side in the vicinity of the intake port shown in FIG. It is a perspective view which shows the intake side opening part vicinity of an intake duct except a body from the vehicle outer side. It is a fragmentary sectional view which shows the sub intake port which concerns on a modification. It is a side view which shows the intake side opening part vicinity of the intake duct which concerns on a modification except an interior member from the vehicle interior side. 6 is a diagram illustrating a cooling structure of a battery unit described in Patent Document 1. FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

  As shown in FIG. 1, a vehicle 10 on which the vehicle battery unit cooling structure of the present embodiment is mounted includes a power unit 1 in which an engine and a motor generator are provided in series, and the engine is driven and assisted by the motor generator. This is a hybrid vehicle capable of collecting electric power from a motor generator and storing it in a battery during vehicle deceleration or the like. The motor generator is, for example, a three-phase AC motor, and the driving force of the engine and the motor generator is transmitted to the front wheels 2 that are driving wheels.

  In such a vehicle 10, the battery unit 11 in which the battery is accommodated is disposed under the floor of the luggage space 4 disposed in the rear portion of the rear seat 3. In addition to the battery, the battery unit 11 also houses electrical components associated with the battery, such as an inverter unit and a DC-DC converter unit (both not shown). The inverter unit converts from direct current to alternating current when power is supplied from the battery of the direct current power source to the motor generator. Further, when the vehicle 10 decelerates or the like, when the engine output or the kinetic energy of the vehicle 10 is converted into electric energy and stored in the battery, the regenerative power generated by the motor generator functioning as a generator is changed from AC to DC. Convert and store in battery. The DC-DC converter unit steps down the high-voltage direct current voltage converted by the inverter unit.

  As shown in FIG. 2, an intake duct 12 that connects between the vehicle compartment 5 and the battery unit 11 is provided on one side wall of the luggage space 4 of the vehicle 10. The intake duct 12 is, for example, a hollow member having a substantially rectangular cross section formed by bending with a synthetic resin, and is covered with a side lining 15 that is an interior member attached to the rear side surface of the vehicle 10. The intake duct 12 has an intake side opening 13 that opens to the vehicle compartment 5 side, and the cooling fan 14 takes in the air in the vehicle compartment 5 as cooling air from the intake side opening 13 and supplies it to the battery unit 11. .

  As shown in FIG. 2, a part of the side lining 15 constitutes a window frame 17 of a quarter window 16 provided on the rear side surface of the rear seat 3, and the window frame 17 is directly below the quarter window 16. A substantially horizontal plane 17a extending substantially horizontally from the front to the center of the quarter window 16 is located, and the standing portion 17b is formed to rise upward from the substantially horizontal plane 17a toward the rear. On the substantially horizontal surface 17a of the window frame 17, an intake grille 19 having a plurality of intake holes 18 is disposed. The intake grille 19 is disposed so as to cover the intake side opening 13 of the intake duct 12 extending to the vicinity of the intake grille 19 so as to prevent an occupant from accidentally dropping an article into the intake duct 12. It is formed in a mesh shape. The intake grille 19 forms a main intake port 20, and normally takes in the air in the passenger compartment 5 from the plurality of intake holes 18 of the intake grille 19 and supplies it to the battery unit 11 through the intake duct 12.

  As shown in FIGS. 3 (a) to 3 (c), the window side end of the side lining 15, which is the mating part of the quarter window 16 and the standing part 17 b of the window frame 17, A cutout portion 15a is formed along the vehicle side with respect to the other portion of the window side end portion. A gap C formed between the notch 15 a and the quarter window 16 constitutes the auxiliary air inlet 30. In addition, a space S <b> 1 communicating with the auxiliary air intake 30 is formed between the body 6 and the quarter window 16.

  The quarter window 16 is fitted into a shelf 6 a formed by bending the body 6 toward the passenger compartment and is attached with an adhesive 35. Further, a reinforcing member 31 is welded to the opposite side of the shelf 6 a of the body 6 to the quarter window 16 to form a superposed portion 41, and the intake side opening of the intake duct 12 is formed by the reinforcing member 31 and the back surface of the side lining 15. A space S <b> 2 communicating with 13 is formed.

  As shown in FIG. 3B, the auxiliary air intake port 30 communicates with a space S <b> 1 defined between the body 6 and the quarter window 16, and is opposed to the side lining 15 by a predetermined distance. The space 6 defined by the back surface of the body 6 and the side lining 15 communicates with a gap D formed by the body 6. In the gap D formed by the body 6 and the side lining 15, an elastic member 32 is releasably attached as shown in FIG. 3C. In the state where the air in the passenger compartment 5 is taken in from the intake hole 18 and supplied to the battery unit 11 via the intake duct 12, the gap D is closed. The elastic member 32 is elastically deformed when the pressure in the intake duct 12, in other words, the pressure in the space S2 defined by the reinforcing member 31 and the side lining 15 changes, and the negative pressure exceeds a predetermined value. 30 and the space S2, in other words, the auxiliary intake port 30 and the intake side opening 13 of the intake duct 12 are communicated with each other.

  As a result, the air in the passenger compartment 5 sucked from the auxiliary air inlet 30 passes through the gap D opened by the elastic deformation of the elastic member 32 as shown by broken line arrows in FIGS. Then, it is guided to the intake side opening 13 of the intake duct 12 through the space S2. Note that the elastic member 32 may be provided in the notch 15 a of the side lining 15 so as to close the gap C between the quarter window 16 and the side lining 15.

  In addition, sound absorbing materials 33 and 34 such as sponges are attached to the back side of the side lining 15 in the vicinity of the auxiliary air inlet 30 and the body 6, respectively.

  Thus, the auxiliary intake port 30 is an emergency intake port that operates when the main intake port 20 (the intake grille 19) is blocked. By providing the auxiliary intake port 30 in a substantially vertical direction, the auxiliary intake port 30 is provided. The possibility that the air inlet 30 is blocked is greatly reduced. Further, the opening area of the auxiliary intake port 30 is smaller than the opening area of the intake grill 19 which is the main intake port 20. This is because the auxiliary air intake 30 is an emergency air intake and can be installed at a position that is not conspicuous even for a small vehicle.

  In addition, the sub intake port 30 can also be comprised as the air hole 15b formed in the side lining 15, as shown in FIG. In this case, it is desirable to provide the air hole 15 b in the standing portion 17 b of the side lining 15 in order to eliminate as much as possible the possibility that the auxiliary air inlet 30 is blocked. As indicated by a broken line arrow in the figure, the air in the passenger compartment 5 sucked from the air hole 15b (sub-intake port 30) passes through the gap D opened by elastic deformation of the elastic member 32, and passes through the space S2. It is guided to the intake side opening 13 of the intake duct 12.

  4 and 5, the intake duct 12 is used in common for the main intake port 20 and the auxiliary intake port 30, and the cooling air sucked from the main intake port 20 and the auxiliary intake port 30 is It is guided into the same intake duct 12 and supplied to the battery unit 11. Specifically, the air sucked from the intake grille 19 (main intake port 20) is guided to the intake duct 12 from the intake side opening 13 that contacts the back surface of the intake grille 19 as shown by the solid line arrow in FIG. Then, the air is blown to the battery unit 11. In other words, the intake grill 19 and the battery unit 11 are directly connected by the intake duct 12.

  On the other hand, the air sucked from the auxiliary intake port 30 passes through the space S2 defined by the reinforcing member 31 of the vehicle 10 and the back surface of the side lining 15 as shown by the broken arrow in FIG. The air is guided to the intake side opening 13 of the intake duct 12 that is spaced apart and is blown to the battery unit 11 through the intake duct 12.

  Next, the effect | action of the cooling structure of the battery unit for vehicles of this embodiment is demonstrated. As shown in FIGS. 1 and 2, when the cooling fan 14 is operated to send cooling air to the battery unit 11, the air in the passenger compartment 5 normally passes through the intake grille 19, which is the main intake port 20. Then, the air is taken into the intake duct 12 from the intake side opening 13 (indicated by solid arrows in FIG. 2) and supplied to the battery unit 11 to be cooled. Since the opening area of the main intake port 20 is large, almost no intake noise due to intake air from the main intake port 20 is generated, and the passenger is not uncomfortable. In addition, the intake grille 19 prevents articles from falling into the intake duct 12.

  At this time, the communication between the auxiliary intake port 30 and the intake side opening 13 of the intake duct 12 is blocked by the elastic member 32 that is releasably attached to the gap D in the auxiliary intake port 30 (FIG. 3 ( c)), the air in the passenger compartment 5 is not taken in from the auxiliary air intake 30. Therefore, no intake noise is generated from the auxiliary intake port 30 and no occupant is uncomfortable.

  Further, when the main intake port 20 is blocked for some reason, the pressure in the intake duct 12 becomes negative due to the suction force of the cooling fan 14. As a result, as shown in FIG. 3B, when the negative pressure in the space S2 defined by the reinforcing member 31 and the side lining 15 communicating with the intake duct 12 exceeds a predetermined value, the body 6 and the side are The elastic member 32 closing the gap D formed by the lining 15 is elastically deformed, and the auxiliary intake port 30 and the intake side opening 13 of the intake duct 12 are communicated.

  2 and FIG. 3B, the air in the passenger compartment 5 is taken in from the auxiliary intake port 30 through the spaces S1, S2, the intake side opening 13 and the intake duct 12, as indicated by broken line arrows. The battery unit 11 is supplied and cooled. Thus, the auxiliary air intake 30 acts as an emergency air intake when the main air intake 20 is blocked, and cools the battery unit 11. Therefore, even if the main air intake 20 is blocked, the battery performance is improved. Can be maintained, and adverse effects on the lifetime can be eliminated.

  As described above, according to the cooling structure for a vehicle battery unit of the present embodiment, the battery unit 11 mounted on the vehicle, the intake side opening 13 and the battery unit 11 extend toward the battery unit 11. 5 is arranged on a side lining 15 attached to the rear side surface of the vehicle so as to cover the intake duct 12 that supplies the air in the battery 5 to the battery unit 11 as cooling air and the intake side opening 13 of the intake duct 12. The intake grille 19 is formed with a cooling fan 14 for taking cooling air into the intake duct 12, and the intake grille 19 forms a main intake port 20 and is disposed on the rear side surface of the vehicle. A sub-intake port 30 having an opening area smaller than that of the intake grille 19 is formed at the joint portion of the quarter window 16 and the side lining 15. Therefore, even if the main intake port 20 is blocked, the air in the passenger compartment 5 is taken in from the auxiliary intake port 30 as emergency cooling air and supplied to the battery unit 11 to ensure battery cooling performance. be able to. Thereby, the abnormal temperature rise of the battery can be prevented, and the deterioration of the battery characteristics and the adverse effect on the life can be prevented.

  Moreover, since the cooling air sucked from the main air intake port 20 and the sub air intake port 30 is supplied to the battery unit 11 through the same air intake duct 12, the space occupied by the air intake duct 12 can be reduced. Even in a small vehicle in which space is restricted, the intake duct 12 having a cross-sectional area capable of supplying an air amount necessary and sufficient for battery cooling can be provided.

  Further, the side lining 15 forms a window frame 17 of the quarter window 16, and the intake grille 19 is disposed on a substantially horizontal plane 17 a of the side lining 15 located immediately below the quarter window 16 from the front to the center of the quarter window 16. Therefore, even in a small vehicle having a small installation space, the main intake port 20 having a large opening area can be provided. Further, since the auxiliary air intake 30 is formed at the mating portion of the side lining 15 rising portion 17b and the quarter window 16 that rises rearward from the substantially horizontal surface 17a of the side lining 15, the auxiliary intake port 30 is used for emergency in a substantially vertical direction. The auxiliary air intake 30 can be disposed, and the possibility of being blocked by an occupant or an article can be greatly reduced. Cooling of the air volume necessary for battery cooling even in an emergency where the main air intake 20 is blocked Wind can be secured. Further, the air sucked from the auxiliary air intake 30 can suck low temperature air instead of high temperature air such as the feet or the back of the seat of the trunk, so that the battery unit 11 is effectively cooled. can do.

  Further, since the auxiliary air inlet 30 is formed by a gap C between the cutout portion 15a at the window side end portion of the side lining 15 and the quarter window 16, the auxiliary air port 30 is excellent in appearance at low cost without using a dedicated part. An intake port 30 can be formed. The auxiliary intake port 30 may be formed by the air hole 15b provided in the side lining 15. Even in this case, the auxiliary intake port 30 is excellent in appearance at low cost without using a dedicated part. 30 can be formed.

  The quarter window 16 is fixed to a shelf 6 a formed by bending the body 6 toward the passenger compartment side, and a reinforcing member 31 is attached to the opposite side of the shelf 6 a to the quarter window 16. The cooling air to be sucked in passes through a gap D formed by the shelf 6a and the back surface of the side lining 15, and from the space S2 formed by the reinforcing member 31 and the back surface of the side lining 15, the intake side opening of the intake duct 12 13, an intake duct for communicating the auxiliary intake port 30 with the intake side opening 13 of the intake duct 12 becomes unnecessary, and the number of parts can be reduced and the cost can be reduced.

  Furthermore, during normal operation (when the main intake port 20 is in an open state), the communication between the auxiliary intake port 30 and the intake duct 12 is blocked, and when the negative pressure acting on the intake duct 12 exceeds a predetermined value, the auxiliary intake port Since the elastic member 32 that allows the communication between the opening 30 and the intake duct 12 is provided, the elastic member 32 is elastically deformed when the negative pressure acting on the intake duct 12 exceeds a predetermined value due to the main intake opening 20 being blocked. Thus, the auxiliary air inlet 30 and the air intake side opening 13 of the air intake duct 12 are communicated with each other, and the cooling air in the passenger compartment 5 is taken in from the auxiliary air inlet 30 to cool the battery unit 11. Further, since the communication between the auxiliary intake port 30 and the intake duct 12 is blocked by the elastic member 32 at normal times, no intake noise is generated from the auxiliary intake port 30 and there is no possibility of causing discomfort to the occupant.

  Further, since the elastic member 32 is attached to the gap C between the quarter window 16 and the side lining 15 or the gap D formed by the shelf 6a of the body 6 and the back surface of the side lining 15, The elastic member 32 can be disposed without affecting the appearance of the interior, and a clean room can be obtained.

  Further, since the sound absorbing material 33 is affixed to the back side of the side lining 15 in the vicinity of the auxiliary air intake 30, the intake air sound taken in from the auxiliary air intake 30 is absorbed by the sound absorbing material 33 and reduced. The interior of the chamber 5 can be quiet. Moreover, this can prevent discomfort given to the occupant.

  Further, since the sound absorbing material 34 is affixed to the shelf 6a of the body 6, the intake sound of the air taken in from the auxiliary air intake 30 is absorbed and reduced by the sound absorbing material 34, so that the interior of the passenger compartment 5 is quiet. Can be. Moreover, this can prevent discomfort given to the occupant.

  In addition, this invention is not limited to each embodiment and modification which were mentioned above, A deformation | transformation, improvement, etc. are possible suitably. Although the hybrid vehicle has been described as the application vehicle, the present invention is not limited to this, and may be, for example, an electric vehicle using only a motor as a drive source.

  In addition, as shown in FIG. 7, the intake duct 12 is formed such that a part of the intake side extends toward the auxiliary intake port 30 and the intake side opening 13 covers the auxiliary intake port 30. May be. In this case, the cooling air taken in from the auxiliary intake port 30 directly enters the intake side opening 13 without passing through the space S2 (see FIG. 3B) defined by the reinforcing member 31 and the side lining 15. Is done.

  As a result, as indicated by a solid arrow in the drawing, the air in the passenger compartment 5 is taken in from the main intake port 20 and supplied to the battery unit 11 via the intake side opening 13 and the intake duct 12 at normal times. . Further, in an emergency when the main intake port 20 is blocked, the air in the passenger compartment 5 taken in from the auxiliary intake port 30 flows from the intake side opening 13 to the intake duct 12 as indicated by broken line arrows in the figure. Thus, the battery unit 11 can be efficiently cooled.

  In the above-described embodiment, the elastic member 32 that blocks the communication between the auxiliary intake port 30 and the intake duct 12 is provided in the gap D formed by the body 6 and the side lining 15 in a normal state, but the elastic member 32 is not necessarily provided. The auxiliary intake port 30 and the intake side opening 13 of the intake duct 12 may always communicate with each other.

  The present application is based on a Japanese patent application (Japanese Patent Application No. 2010-027849) filed on February 10, 2010, the contents of which are incorporated herein by reference.

5 Car compartment 6 Body (vehicle body)
6a Shelf 10 Vehicle 11 Battery unit 12 Intake duct 13 Intake side opening 14 Cooling fan 15 Side lining (interior member)
15a Notch 15b Air hole 16 Quarter window (window)
17 Window frame 17a Approximate horizontal surface 17b Standing portion 18 Intake hole 19 Intake grill 20 Main intake port 30 Sub intake port 31 Reinforcement member 32 Elastic member 33 Sound absorbing material 34 Sound absorbing material
C, D Gap S1, S2 space

Claims (10)

A battery unit mounted on the vehicle; an air intake duct having an air intake side opening and extending toward the battery unit; and supplying air in the vehicle compartment to the battery unit as cooling air; and an air intake side of the air intake duct A vehicle comprising: an intake grill disposed on an interior member attached to a rear side surface of the vehicle so as to cover the opening, and a plurality of intake holes formed therein; and a cooling fan for taking cooling air into the intake duct Battery unit cooling structure,
The intake grill forms a main intake port,
A cooling structure for a vehicle battery unit, wherein a sub-intake having an opening area smaller than that of the intake grill is formed at a joint portion between the window disposed on the rear side surface of the vehicle and the interior member.   The cooling of the vehicle battery unit according to claim 1, wherein the cooling air sucked from the main intake port and the auxiliary intake port is supplied to the battery unit through the same intake duct. Construction. The interior member forms a window frame of the window;
The intake grill is arranged on a substantially horizontal plane of the interior member located directly under the window from the front to the center of the window,
3. The vehicle battery according to claim 1, wherein the sub-intake port is formed at a portion where the upright portion of the interior member rises upward from the substantially horizontal plane toward the rear and the window. 4. Unit cooling structure.   4. The cooling structure for a vehicle battery unit according to claim 3, wherein the sub air intake port is formed by a gap between a notch portion provided at an end portion on the window side of the interior member and the window. 5. .   4. The cooling structure for a vehicle battery unit according to claim 3, wherein the auxiliary air inlet is formed by an air hole provided in the interior member. The window is fixed to a shelf formed by bending the vehicle body toward the passenger compartment,
A reinforcing member is attached to the side of the shelf opposite to the window,
The cooling air sucked from the auxiliary air intake port passes through the gap formed by the shelf and the back surface of the interior member, and then the intake side opening portion from the space formed by the reinforcing member and the back surface of the interior member. The cooling structure for a vehicle battery unit according to claim 1, wherein the cooling structure is introduced into the vehicle.   An elastic member that cuts off the communication between the auxiliary intake port and the intake duct at a normal time and permits the communication between the auxiliary intake port and the intake duct when a negative pressure acting on the intake duct exceeds a predetermined value The vehicle battery unit cooling structure according to any one of claims 2 to 6, further comprising:   The said elastic member is attached to the said clearance gap formed between the said clearance gap between the said window and the said interior member, or the said shelf part of the said vehicle body, and the back surface of the said interior member. The cooling structure for the vehicle battery unit described in 1.   The cooling structure for a vehicle battery unit according to any one of claims 1 to 8, wherein a sound absorbing material is affixed to a back side of the interior member in the vicinity of the auxiliary air inlet.   The cooling structure for a vehicle battery unit according to any one of claims 6 to 9, wherein a sound absorbing material is attached to the shelf.

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