JP6546770B2 - Battery cooling structure - Google Patents

Description

  The present invention relates to a battery cooling structure.

  BACKGROUND ART A battery (high voltage battery) for driving a motor is mounted on a vehicle such as a HEV (Hybrid Electrical Vehicle) and an EV (Electrical Vehicle). This type of vehicle has a cooling structure for cooling a battery, and an air cooling type cooling structure is widely adopted.

  For example, in Patent Document 1, a battery is disposed under a seat in a vehicle compartment, and a state in which the battery is cooled with air introduced from the vehicle compartment (hereinafter, appropriately referred to as vehicle interior air) and discharged from an air conditioner. A battery cooling structure is shown that can be switched between a state in which the battery is cooled by air (hereinafter referred to as conditioned air as appropriate) and a state in which the battery is cooled by the air introduced from the luggage compartment.

JP 2004-331024 A

  In the battery cooling structure described in Patent Document 1, the middle portion of the air conditioning duct that connects the air conditioner and the air conditioning outlet that opens into the vehicle compartment is branched and connected to the battery side. Since it is necessary to switch the flow path by providing a switching valve, this increases the manufacturing cost. Further, in the battery cooling structure described in Patent Document 1, air that is originally taken in from the passenger compartment for cooling the battery from the air conditioning outlet for discharging the conditioned air, or after the battery is cooled As a result, the occupant may feel discomfort or discomfort.

  An object of the present invention is to provide a battery cooling structure capable of performing efficient cooling using passenger compartment air and conditioned air while suppressing manufacturing costs.

In order to achieve the above object, the invention according to claim 1 is
A battery (for example, a battery 1 in an embodiment described later),
An intake port (for example, an intake grill 5 in an embodiment described later) for taking in air in a vehicle compartment;
A battery cooling structure comprising: an air intake duct (for example, an air intake duct 6 in an embodiment described later) communicating with the air intake and introducing air in a vehicle compartment into the battery;
In the air intake duct, a discharge port (for example, in an embodiment described later) of an air conditioning duct (for example, an air conditioning duct 100 in an embodiment described later) that is connected to an air conditioner and introduces air discharged from the air conditioner. The outlet 101b) of the
The outlet of the air conditioning duct is connected to a junction (for example, a junction J in an embodiment described later) located upstream of the intake duct,
At the merging portion, the air in the vehicle compartment and the air discharged from the air conditioner merge .

The invention according to claim 2 is
The battery cooling structure according to claim 1 ,
In the air conditioning duct, a part of the air conditioning duct (for example, an air conditioning duct 101 in a storage unit in an embodiment to be described later) is disposed opposite to each other along the intake duct.
The discharge port was formed on the downstream side of the part.

The invention according to claim 3 is
The battery cooling structure according to claim 1 or 2 , wherein
The battery and the air intake duct are accommodated in a battery accommodating portion (for example, a battery accommodating portion P in an embodiment described later), and an in-accommodating air conditioning duct (for example, described later) constituting a part of the air conditioning duct. The air conditioning duct 101 in the accommodating portion in the embodiment is also accommodated in the battery accommodating portion,
The outlet is provided in the air conditioning duct in the storage section.

The invention according to claim 4 is
The battery cooling structure according to any one of claims 1 to 3 , wherein
The discharge port is provided to face the battery.

The invention according to claim 5 is
The battery cooling structure according to any one of claims 1 to 4 , wherein
A one-way valve (for example, a one-way valve 61 in an embodiment described later) that regulates the flow of air from the outlet to the inlet is provided between the inlet and the outlet.

The invention according to claim 6 is
The battery cooling structure according to any one of claims 1 to 5 , wherein
The air conditioning duct has a branch (for example, a branch 103 in an embodiment described later),
One end of the branch portion is connected to an air conditioning outlet (for example, the air conditioning outlet 105 in the embodiment described later) opened in the vehicle compartment,
The other end of the branch portion is connected to the intake duct.

The invention according to claim 7 is
The battery cooling structure according to claim 6 ,
The battery is disposed below the rear seat (e.g., the rear seat 12 in the later-described embodiment),
The branch portion is disposed in a center console (for example, the center console 21 in the embodiment described later) provided between a pair of front seats.

The invention according to claim 8 is
The battery cooling structure according to claim 7 , wherein
Between the branch and the air conditioning outlet, a one-way valve (for example, a one-way valve 107 in an embodiment described later) for restricting the flow of air from the air conditioning outlet to the branch is provided. The

The invention according to claim 9 is
The battery cooling structure according to claim 7 or 8 , wherein
As for the air conditioning duct, a part (for example, an in-console air conditioning duct 102 in an embodiment to be described later) is provided on a floor panel (for example, a floor panel F in an embodiment to be described later)
The part is provided with a rising part (for example, rising part 102c in an embodiment described later) rising from the bottom surface (for example, a bottom surface section 102b in an embodiment described later).
The one end of the branch portion is connected to the air conditioning outlet via the rising portion, and the other end extends from the bottom surface toward the intake duct.

The invention according to claim 10 is
The battery cooling structure according to claim 9 ,
The branch portion is provided with a filter member (for example, a filter member 106 in an embodiment described later).

The invention according to claim 11 is
The battery cooling structure according to claim 10 , wherein
The battery and the air intake duct are accommodated in a battery accommodating portion (for example, a battery accommodating portion P in an embodiment described later), and an in-accommodating air conditioning duct (for example, described later) constituting a part of the air conditioning duct. The air conditioning duct 101 in the accommodating portion in the embodiment is also accommodated in the battery accommodating portion,
In the air conditioning duct, an upward inclination or an upward level difference (for example, a level difference portion 104 a in an embodiment described later) is provided between the branch portion and the air conditioning duct in the storage portion.

The invention according to claim 12 is
The battery cooling structure according to any one of claims 9 to 11 , wherein
Under the floor panel, an exhaust pipe (for example, an exhaust pipe 10 in an embodiment described later) and a muffling section (for example, a muffling section 10a in an embodiment described later) provided in the exhaust pipe are provided. ,
The branch portion is disposed at a position offset from the muffling portion in the front-rear direction.

According to the invention of claim 1, since the air conditioning duct is connected to the intake duct for introducing the vehicle interior air, the battery is actively cooled with the vehicle interior air and the air conditioned air, and the performance of the battery due to the temperature rise And the decrease in life can be prevented. In addition, since no switching valve is required, the manufacturing cost can be reduced. Further, since the introduction of the air in the passenger compartment is directly performed from the intake port connected to the intake duct without passing through the air conditioning duct, it is possible to prevent the occupant from feeling uncomfortable or uncomfortable.
In addition, since the discharge port of the air conditioning duct is connected to the merging portion located on the upstream side of the intake duct, the vehicle interior air and the conditioned air are mixed on the upstream side of the intake duct and the mixed air is directed to the battery Can be supplied. Thereby, temperature unevenness of the air supplied to the battery can be suppressed, and the cooling temperature of the battery can be equalized.

According to the second aspect of the present invention, a part of the air conditioning duct is disposed opposite to the air intake duct, and a discharge port is formed on the downstream side, so that the space between the air conditioning duct and the air intake duct is formed. The heat exchange can reduce the air temperature in the intake duct.

According to the third aspect of the present invention, the air conditioning duct in the storage unit constituting a part of the air conditioning duct is housed in the battery housing together with the air intake duct, so that not only the duct can be protected but also assembly workability can be achieved. It can be improved.

According to the fourth aspect of the present invention, since the discharge port of the air conditioning duct is provided to face the battery, the pressure loss can be reduced by directing the conditioned air to the battery.

According to the fifth aspect of the present invention, since the one-way valve for restricting the flow of the air from the discharge port discharging the conditioned air into the intake duct to the intake port is provided, the backflowed conditioned air is exhausted from the intake port. It is possible to prevent the passenger from feeling uncomfortable.

According to the invention of claim 6 , since the air conditioning duct connected to the air conditioning outlet is branched to introduce the conditioned air into the battery, the conditioned air is introduced while suppressing the influence on the air conditioning, and the battery is It can be actively cooled. Further, as compared with the case where a dedicated air conditioning duct is extended from the air conditioner and introduced into the battery, not only the number of parts as the air conditioning duct can be reduced but also an increase in weight can be suppressed.

According to the seventh aspect of the present invention, the battery is disposed below the rear seat, and the branch portion of the air conditioning duct is disposed in the center console, so that the air conditioning duct can be easily handled. Not only that, the influence on the interior space of the vehicle can also be reduced.

According to the invention as set forth in claim 8 , a one-way valve for restricting the flow of air from the air conditioning outlet to the branching portion is provided between the branching portion of the air conditioning duct and the air conditioning outlet. Can prevent the in-room air for cooling the battery from being sucked in from the air conditioning outlet for discharging the conditioned air, and as a result, the passenger feels discomfort due to the air intake from the air conditioning outlet, or the intake noise It is possible to prevent the passenger from feeling uncomfortable due to the increase of the noise in the passenger compartment.

According to the invention of claim 9 , since the other end of the branch portion extends from the bottom surface of the air conditioning duct toward the intake duct, the air conditioning air is branched while directing the main flow of the air conditioning air to the air conditioning outlet. As a result, it is possible to suppress the influence on air conditioning and maintain a good vehicle interior environment.

According to the tenth aspect of the invention, since the filter member is provided at the branch portion of the air conditioning duct, it is possible to prevent the foreign matter from being mixed in the battery.

According to the invention of claim 11 , since the air conditioning duct is provided with an upward inclination or an upward step between the branch portion and the in-housing air conditioning duct, the inside of the air conditioning duct is provided. It is possible to prevent water from entering the battery by receiving dew condensation or water that has entered from the air conditioning outlet with a slope or a step.

According to the invention as set forth in claim 12 , since the branch portion of the air conditioning duct is disposed at a position offset in the front-rear direction with the muffling portion of the exhaust pipe, heat reception from the muffling portion to be expanded is suppressed. The decrease in cooling efficiency due to the received heat can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is a principal part perspective view of the vehicle by which the battery unit which concerns on one Embodiment of this invention was mounted. It is a principal part perspective view of the vehicles showing mounting before a battery unit. It is XX sectional drawing of FIG. It is YY sectional drawing of FIG. It is a front view which shows an air intake duct and the duct for air conditioning in an accommodating part. It is a principal part sectional view of a vehicle showing composition and arrangement of an air-conditioning duct. It is a principal part perspective view of a vehicle showing composition and arrangement of an air-conditioning duct. It is a front view which shows the modification of an air intake duct and the duct for air conditioning in an accommodating part.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the front, rear, left, right, up, and down are Fr, Rr on the front, Rr on the left, L on the left, and right in the following description according to the direction viewed from the driver. One side is indicated as R, the upper side as U, and the lower side as D.

  The vehicle V of the present embodiment shown in FIGS. 1 and 2 is, for example, a hybrid vehicle, and a battery unit U accommodating the battery 1 is mounted. The battery unit U is disposed in the housing recess H recessed in the floor panel F and fastened to the floor panel F.

[Battery unit]
First, the battery unit U will be described with reference to FIGS. 1 to 6.
The battery unit U shown in FIGS. 1 to 4 includes a case 3 and a lid member 4 constituting a battery accommodating portion P which is a housing thereof, a battery 1 accommodated in the battery accommodating portion P, and a DC / DC converter It comprises the electric device D such as 2nd grade and the part C for cooling which cools the battery 1 grade. The part C for cooling includes the intake grill 5, the intake duct 6, the internal exhaust duct 7, the cooling fan 8, the air conditioning duct 101 in the storage portion, and the like.

  The case 3 is a horizontally long substantially rectangular parallelepiped resin member having an open upper portion, and a box-shaped case main body 31 opening upward, and an annular flange portion extending outward from the opening edge of the case main body 31. And 32. As shown in FIG. 4, in the case main body 31, the battery 1 is offset on the left side across the center in the vehicle width direction (left-right direction), and the DC / DC converter 2 is disposed on the right side.

  The lid member 4 is a member for closing the opening of the case main body 31, and supports the seat front side (front side of the buttocks) of the rear seat 12 on the upper surface thereof. The lid member 4 has a ceiling portion 43 formed in a substantially rectangular shape substantially corresponding to the opening of the case main body 31, a substantially square frame shaped vertical wall 44 hanging down integrally from the outer peripheral edge of the ceiling portion 43, and a vertical wall A flange portion 45 extending outward from the lower end edge of the flange 44 is formed.

  In the surface of the vertical wall 44 facing the front, a vehicle interior air introduction hole 44a for attaching the intake grille 5 is formed on the left side, and the air discharged by the air conditioner (not shown) A duct through hole 44b for introduction is formed at the center (see FIG. 2). Furthermore, although illustration is omitted, an exhaust hole connecting the exhaust duct 9 is formed on the surface of the vertical wall 44 facing the right.

  As shown in FIG. 3, the flange portion 45 of the lid member 4 is sealed by being superimposed on the flange portion 32 of the case 3 via the annular seal member 51. The flange members 32 and 45 overlapped are collar members 53 interposed between the flanges 32 and 45 and the floor panel F by a plurality of bolts B passing through the flanges 32 and 45 from above. , And is screwed into a nut N previously welded to the lower side of the floor panel F.

  The battery 1 is composed of a plurality of battery modules 11. The battery module 11 has a rectangular shape, and is disposed inside the battery storage portion P such that the longitudinal direction is along the left-right direction (the vehicle width direction). In each battery module 11, as shown in FIG. 4, a plurality of battery cells 11a vertically arranged are arranged in the left-right direction. Here, vertically placed means that the shortest side of the three sides extends in the left-right direction. Further, between the adjacent battery cells 11a, a gap 11b which is a flow path of the cooling air is formed.

  The battery unit U of the present embodiment has four battery modules 11, and the battery storage portion P is arranged such that the two battery modules 11 are aligned in the left-right direction and the two battery modules 11 are aligned in the vertical direction. It is located inside.

  The cooling part C sucks the air in the vehicle compartment 14 into the inside of the battery storage portion P, cools the battery 1 with the sucked air, and constitutes a cooling flow path for discharging the air after cooling into the loading space 15 doing. The intake grill 5 is attached to a vehicle interior air introduction hole 44 a formed in the vertical wall 44 of the lid member 4, and takes in the air in the vehicle compartment 14 from the lower front of the rear seat 12 into the battery housing P.

  An intake duct 6 communicating with the intake grill 5 is disposed in front of the battery 1, and an internal exhaust duct 7 communicating with the cooling fan 8 is disposed rearward of the battery 1. That is, the intake duct 6 and the internal exhaust duct 7 are distributed to the front and rear sides in the battery storage portion P, and the battery 1 to be cooled is disposed between the intake duct 6 and the internal exhaust duct 7. Ru.

  As shown in FIG. 3, FIG. 5 and FIG. 7, the intake duct 6 has a projecting portion 6a projecting upward on the upper left side thereof, and left and right opening toward the vehicle compartment 14 on the front surface of the projecting portion 6a. A vehicle interior air inlet 6b having a wide direction is formed. The intake grill 5 is connected by being fitted to the in-room air inlet 6 b, and introduces the air in the vehicle compartment 14 into the intake duct 6. As shown in FIG. 3, the rear face of the intake duct 6 is entirely open toward the front face of the battery 1, and the cabin air introduced from the cabin air inlet 6 b is along the inside of the intake duct 6. It flows into the air gap 11 b between the battery cells 11 a, the air gap between the battery modules 11 and the like while flowing downward and rightward to cool the battery 1.

  As shown in FIG. 4, the inner exhaust duct 7 has an inner exhaust duct main body 7 a whose front surface opens toward the rear surface of the battery 1, and the inner exhaust duct main body 7 a passing through the rear of the DC / DC converter 2 and a cooling fan 8. And a cooling fan connection duct 7b connected to the The cooling fan 8 is in communication with the luggage compartment 15 via the exhaust duct 9. When the cooling fan 8 is driven, the air in the passenger compartment 14 is introduced into the air intake duct 6 in the battery storage portion P via the air intake grill 5. The air in the passenger compartment introduced into the intake duct 6 cools the battery 1 by flowing through the internal exhaust duct 7 while passing through the battery 1. The cooled air flowing into the inner exhaust duct 7 is sucked into the cooling fan 8 and is discharged into the luggage compartment 15 through the exhaust duct 9.

  Furthermore, in order to introduce the air discharged by the air conditioner into the battery storage portion P to actively cool the battery 1, the air conditioning duct within the storage portion is a part of the air conditioning duct 100 connected to the air conditioner. 101 is accommodated. The housing air conditioning duct 101 is disposed on the upper front of the intake duct 6 so as to face the intake duct 6 along the left-right direction. The entire rear surface of the air conditioning duct 101 in the storage section of the present embodiment is open, and the air flow path is formed by covering the opening with the front surface of the intake duct 6. At the right end side of the in-accommodation air conditioning duct 101, a duct connection port 101a having a wide width in the left-right direction and opened forward is formed. The duct connection port 101a is discharged from the air conditioner by being connected to the air conditioning duct 100 disposed outside the battery storage portion P via a duct through hole 44b formed in the vertical wall 44 of the lid member 4. The conditioned air to be introduced is introduced into the air conditioning duct 101 in the storage section. The left end side of the in-accommodation air conditioning duct 101 is in communication with an air conditioning apparatus inlet 6 c formed in the air intake duct 6 in the left-right direction wide shape. As a result, the conditioned air introduced into the air conditioning duct 101 in the storage unit from the duct connection port 101a is discharged into the air intake duct 6 with the air conditioner inlet 6c of the air intake duct 6 as the discharge port 101b.

  The discharge port 101b of the air conditioning duct 101 in the storage section faces the front surface of the battery 1, and the conditioned air discharged from the discharge port 101b merges with the vehicle interior air at the upstream side of the intake duct 6 (joining section J). The battery 1 is supplied to the battery 1 while being mixed with the cabin air. Specifically, the intake grille 5 for sucking in the vehicle interior air is provided upstream of the vehicle interior air inlet 6b of the intake duct 6 adjacent to the vehicle interior air inlet 6b and is a housing for introducing the conditioned air. The discharge port 101b (air conditioner inlet 6c) of the in-section air conditioning duct 101 is provided on the downstream side of the vehicle interior air inlet 6b adjacent to the vehicle interior air inlet 6b.

  A one-way valve 61 that restricts the flow of air from the outlet 101 b to the inlet grill 5 is provided between the inlet grill 5 and the outlet 101 b of the in-housing air conditioning duct 101. In the one-way valve 61, for example, when the cooling fan 8 is stopped and the air conditioner is in operation, the air conditioning air discharged from the discharge port 101b of the air conditioning duct 101 in the storage section flows back and takes in air. It is for controlling exhausting from the grille 5. The one-way valve 61 of the present embodiment is configured by suspending a rubber-like sheet member to the vehicle interior air inlet 6 b of the intake duct 6, and when the cooling fan 8 is in a driving state, When the interior air intake port 6b is opened by moving backward due to the internal negative pressure or the air pressure of the cabin air taken in from the intake grille 5, while the cooling fan 8 is stopped and the air conditioner is in operation The air intake port 6b is kept closed by the air pressure of conditioned air which is going to flow backward.

  As shown in FIG. 3, the in-accommodating unit air conditioning duct 101 of the present embodiment is disposed using a gap A that is present as a dead space inside the battery accommodating portion P. The air gap A exists between the front face of the intake duct 6 extending upward of the flanges 32 and 45 of the case 3 and the cover 4 and the vertical wall 44 of the cover 4. The in-housing air conditioning duct 101 of the embodiment is disposed in the air gap A along the flanges 32 and 45.

[Floor structure]
Next, the floor structure of the vehicle V will be described with reference to FIGS. 1 to 3 and 6.

  As shown in FIGS. 1 to 3 and 6, the floor panel F of the vehicle V includes a front floor panel 16 forming a floor of the compartment 14 and a rear floor panel 17 forming a floor of the luggage compartment 15 and the like. Are connected below the rear seat 12, and both ends in the vehicle width direction are connected to a pair of left and right frame members 18 extending along the front-rear direction.

  The rear end of the front floor panel 16 is formed with a kickup portion 16a that rises upward. Further, a center tunnel 16 b is formed at the center in the vehicle width direction of the front floor panel 16 along the front-rear direction. The center tunnel 16b is bent so that the front floor panel 16 is convex upward, and a trapezoidal tunnel space S1 is formed below. In the tunnel space S1, an exhaust pipe 10 provided with the muffled portion 10a whose diameter is enlarged is disposed.

  A housing recess H is recessed on the front side of the rear floor panel 17, and the battery unit U is housed therein. A front reinforcing portion R1 and a rear reinforcing portion R2 straddling the left and right frame members 18 are provided on the front side and the rear side of the housing recess H, and the battery unit U is sealed by the annular seal member 52 here. It is concluded with The front side of the rear seat 12 is disposed above the battery unit U, avoiding the buttocks, and the intake grille 5 of the battery unit U is disposed to face the inside of the compartment 14 to the front lower side of the rear seat 12 The air in the compartment 14 is introduced into the battery unit U.

  Although illustration is omitted, a pair of left and right front seats are provided in front of the rear seat 12, and an air conditioner is disposed in front of the front seats. Further, a center console 21 provided with a small item storage portion 19, an armrest 20, and the like is provided between the pair of left and right front seats.

[Configuration and Arrangement of Air Conditioning Duct]
Next, the configuration and arrangement of the air conditioning duct 100 will be described with reference to FIGS. 6 and 7.

  The air conditioning duct 100 includes an in-console air conditioning duct 102 provided in the center console 21 and a branching air conditioning duct 104 branched from the in-console air conditioning duct 102 via a branch portion 103 and extending toward the battery unit U. And an air conditioning duct for in-accommodation unit 101 accommodated in the battery unit U.

  The in-console air conditioning duct 102 guides the air discharged by the air conditioning apparatus to the air conditioning outlet 105 provided at the upper rear end of the center console 21, and along the upper surface of the center tunnel 16 b in the center console 21. The air conditioning outlet 105 is connected to the upper end of the rising portion 102c.

  The branch portion 103 branches the horizontal portion 102a of the in-console air conditioning duct 102 into the rising portion 102c and the branch air conditioning duct 104 via the branch port 103a formed in the bottom portion 102b of the horizontal portion 102a. Accordingly, it is possible to branch the conditioned air and introduce it into the battery unit U while directing the main flow of the conditioned air to the air conditioning outlet 105.

  The branch port 103a is provided with a filter member 106 for restricting the passage of foreign matter. The type of the filter member 106 is arbitrary as long as it allows the passage of conditioned air while restricting the passage of foreign matter, and for example, a mesh member in which a large number of minute holes are formed can be used.

  The branching unit 103 of the present embodiment is disposed in the center console 21. The exhaust pipe 10 is disposed along the front-rear direction below the branch portion 103, but the branch portion 103 is disposed at a position offset from the muffling portion 10a of the exhaust pipe 10 in the front-rear direction. As a result, the heat reception from the muffling section 10a whose diameter is enlarged to the branching section 103 is suppressed.

  The branch air conditioning duct 104 is disposed along the upper surface of the center tunnel 16b. The branch air conditioning duct 104 of the present embodiment is a flat duct, and the influence on the passenger compartment space is suppressed. The front end portion of the branch air conditioning duct 104 is connected to the branch port 103a of the branch portion 103, and the rear end portion is connected to the duct connection port 101a of the in-storage air conditioning duct 101 via the duct through hole 44b of the battery unit U Be done. As a result, the conditioned air branched by the branch portion 103 is introduced into the intake duct 6 of the battery unit U via the branch air conditioning duct 104 and the in-housing air conditioning duct 101.

  In the branch air conditioning duct 104 of the present embodiment, a stepped portion 104a is formed to increase the flow path of the conditioned air toward the downstream side. Specifically, a stepped portion 104a rising from the rear end of the branch air conditioning duct 104 is formed, and the stepped portion 104a receives condensation in the air conditioning duct 100 or water entering from the air conditioning outlet 105, Water is prevented from entering the battery unit U. In addition, even if it is not the level | step-difference part 104a but an inclination part which inclines upwards, permeation of water can be prevented.

  Further, a one-way valve 107 for restricting the flow of air from the air conditioning outlet 105 to the branching portion 103 is provided between the branching portion 103 and the air conditioning outlet 105. For example, when the cooling fan 8 is driven and the air conditioner is stopped, the one-way valve 107 is connected to the in-console air conditioning duct 102, the branch air conditioning duct 104, and the in-storage air conditioning from the air conditioning outlet 105. It is for preventing the in-room air for cooling the battery 1 through the duct 101 from being sucked. The one-way valve 107 according to the present embodiment is formed of a rubber-like sheet member capable of opening and closing the air conditioning outlet 105, and when the air conditioning system is in operation, the wind pressure of the conditioned air discharged from the air conditioning system While the air conditioning outlet 105 is moved backward to open the air conditioning outlet 105, the air conditioning outlet 105 is maintained closed by its own weight.

  In the cooling structure of the battery 1 configured as described above, when the air conditioner is in operation when cooling the battery 1, the in-console air conditioning duct 102, the branch air conditioning duct 104, and the in-housing air conditioning duct 101 are used. The conditioned air is discharged from the discharge port 101b to the intake duct 6 via the air outlet. In the intake duct 6, the conditioned air discharged from the discharge port 101 b and the vehicle interior air taken in from the intake grill 5 are mixed and supplied to the battery 1. Especially when the battery 1 needs to be cooled, for example, it is assumed that the temperature of the cabin is high and the air conditioner is in operation under the summer sun, but in this case the conditioned air and the cabin air are mixed. By cooling the battery 1 with air, it is possible to cool the battery 1 more efficiently than in the case where the battery 1 is cooled only with the air in the cabin taken in from the intake grill 5.

  As described above, according to the cooling structure of the battery 1 according to the present embodiment, since the air conditioning duct 100 is connected to the intake duct 6 for introducing the vehicle interior air, the battery 1 is made of the vehicle interior air and the conditioned air. By actively cooling, it is possible to prevent the decrease in the performance and the life of the battery 1 due to the temperature rise. In addition, since no switching valve is required, the manufacturing cost can be reduced. Further, since the introduction of the air in the vehicle compartment is directly performed from the intake grill 5 connected to the intake duct 6 without passing through the air conditioning duct 100, it is possible to prevent the passenger from feeling uncomfortable or uncomfortable.

  Further, since the discharge port 101b of the air conditioning duct 100 is connected to the merging portion J located on the upstream side of the intake duct 6, the vehicle interior air and the conditioned air are mixed and mixed on the upstream side of the intake duct 6. Air can be supplied to the battery 1. Thereby, the temperature unevenness of the air supplied to the battery 1 can be suppressed, and the cooling temperature of the battery 1 can be equalized.

  Further, the in-accommodation air conditioning duct 101 is disposed opposite to the air intake duct 6, and the discharge port 101b is formed on the downstream side of the in-accommodation air conditioning duct 101. The air temperature in the intake duct 6 can be reduced by the heat exchange between the two.

  Further, since the air conditioning duct 101 in the accommodating portion is accommodated in the battery accommodating portion P together with the intake duct 6, not only the duct can be protected but also assembling workability can be improved.

  Further, since the discharge port 101 b of the air conditioning duct 100 is provided to face the front surface of the battery 1, the air conditioning air can be discharged toward the battery 1 to reduce pressure loss.

  In addition, since the one-way valve 61 for restricting the flow of air from the discharge port 101b for discharging the conditioned air into the intake duct 6 to the intake grill 5 is provided, the conditioned air flowing back from the intake grill 5 is exhausted. It can prevent discomfort to the occupants.

  Further, since the air conditioning duct 100 connected to the air conditioning outlet 105 is branched to introduce the conditioned air into the battery 1, the air conditioning air is introduced while actively affecting the air conditioning while suppressing the influence on the air conditioning. be able to. Further, as compared with the case where a dedicated air conditioning duct is extended from the air conditioner and introduced into the battery 1, not only the number of parts as the air conditioning duct 100 can be reduced but also an increase in weight can be suppressed.

  In addition, since the battery 1 is disposed below the rear seat 12 and the branch portion 103 of the air conditioning duct 100 is disposed in the center console 21, not only is the air conditioning duct 100 easily handled. The influence on the interior space of the vehicle can also be reduced.

  Further, since the one-way valve 107 for restricting the flow of air from the air conditioning outlet 105 to the branching portion 103 is provided between the branching portion 103 and the air conditioning outlet 105 of the air conditioning duct 100, the air conditioning air is originally Air can be prevented from being drawn in through the air conditioning outlet 105 for discharging the air from the air conditioning outlet for cooling the battery 1. As a result, the occupant feels discomfort due to the air intake from the air conditioning outlet 105, or the intake noise It is possible to prevent the passenger from feeling uncomfortable due to the increase of the noise in the passenger compartment.

  Further, since the branch air conditioning duct 104 connected to the branch portion 103 extends from the bottom portion 102b of the in-console air conditioning duct 102 toward the intake duct 6, the main flow of the conditioned air is directed to the air conditioning outlet 105 The conditioned air can be branched and introduced into the battery 1, and as a result, the influence on the air conditioning can be suppressed to maintain a good vehicle interior environment.

  In addition, since the filter member 106 is provided at the branch portion 103 of the air conditioning duct 100, it is possible to prevent the entry of foreign matter into the battery 1.

  Further, in the air conditioning duct 100, since the upper step portion 104a is provided between the branch portion 103 and the in-housing air conditioning duct 101, dew condensation in the air conditioning duct 100 or the air conditioning outlet 105 is obtained. The water which has entered from the step can be received by the step portion 104 a to prevent the water from entering the battery 1.

  Further, since the branch portion 103 of the air conditioning duct 100 is disposed at a position offset in the front-rear direction with the muffling portion 10a of the exhaust pipe 10, heat reception from the muffled portion 10a to be expanded is suppressed, and the heat reception is caused. It is possible to prevent a decrease in cooling efficiency.

  Next, a modification of the air intake duct 6 and the air conditioning duct 101 in the storage section will be described with reference to FIG. However, about the member common to the said embodiment, the same code | symbol is provided and only a different point is demonstrated.

  The positions of the intake duct 6 and the in-accommodating air conditioning duct 101 shown in FIG. 8 at which the conditioned air is discharged into the intake duct 6 are different from the above embodiment. Specifically, the air-conditioning system inlet 6c of the intake duct 6 is not at a position adjacent to the lower side of the vehicle interior air inlet 6b, but in the middle in the height direction of the intake duct 6 and dispersed in the left-right direction. It is formed in plural. In this case, when the battery 1 is configured of a plurality of battery modules 11, the air conditioner inlet 6c is opened toward the respective battery modules 11, or opened to a position where cooling air tends to stagnate. This makes it possible to increase the cooling efficiency.

The present invention is not limited to the above-described embodiment and modifications, and appropriate modifications, improvements, and the like can be made.
For example, in the above embodiment, the entire rear surface of the air conditioning duct 101 in the storage section is open, and the air flow path is formed by covering the opening with the front surface of the intake duct 6. It may have a closed cross-sectional structure which itself constitutes an air flow path, and the discharge port 101 b of the air conditioning duct 101 in the storage portion may be configured to communicate with the air conditioning device inlet 6 c of the intake duct 6.

Further, the air conditioner inlet 6c may be provided anywhere in the flow path connecting the in-room air inlet 6b and the battery 1.
In addition, a dedicated air conditioning duct may be extended from the air conditioner without branching the air conditioning duct connected to the air conditioning outlet. Thus, the air conditioning air can be introduced from the air conditioning apparatus to the intake duct according to the cooling request of the battery 1 as well as when the air conditioning apparatus is in the operating state by the occupant's cooling request.

J Joint part P Battery housing part F Floor panel 1 Battery 5 Intake grille (intake port)
6 Air intake duct 10 Exhaust pipe 10a Muffler 12 Rear seat 21 Center console 61 One-way valve 100 Air conditioning duct 101 In-housing air conditioning duct 101b Discharge port 102b Bottom surface (bottom surface)
102c Rising portion 103 Branching portion 104a Stepped portion 105 Air conditioning outlet 106 Filter member 107 One-way valve

Claims (12)

With the battery,
An intake that takes in the air in the vehicle compartment,
And a suction duct communicating with the suction port and introducing an air in the vehicle compartment into the battery.
The air intake duct is connected to a discharge port of an air conditioning duct which is connected to an air conditioner and introduces the air discharged from the air conditioner ,
The outlet of the air conditioning duct is connected to a junction located upstream of the intake duct,
The battery cooling structure in which the air in the vehicle compartment and the air discharged from the air conditioner merge at the merging portion . The battery cooling structure according to claim 1 ,
The air conditioning duct is partially disposed opposite to the air intake duct.
The battery cooling structure, wherein the discharge port is formed on the downstream side of the part. The battery cooling structure according to claim 1 or 2 , wherein
The battery and the intake duct are accommodated in a battery accommodating portion, and an in-accommodating air conditioning duct which constitutes a part of the air conditioning duct is also accommodated in the battery accommodating portion.
The battery cooling structure, wherein the discharge port is provided in the air conditioning duct in the housing portion. The battery cooling structure according to any one of claims 1 to 3 , wherein
The discharge port is provided to face the battery, the battery cooling structure. The battery cooling structure according to any one of claims 1 to 4 , wherein
The battery cooling structure is provided with a one-way valve for restricting the flow of air from the outlet to the inlet between the inlet and the outlet. The battery cooling structure according to any one of claims 1 to 5 , wherein
The air conditioning duct has a branch portion,
One end of the branch portion is connected to an air conditioning outlet that opens into the vehicle compartment,
The battery cooling structure, wherein the other end of the branch portion is connected to the intake duct. The battery cooling structure according to claim 6 ,
The battery is disposed below the rear seat,
The branch portion is a battery cooling structure disposed in a center console provided between a pair of front seats. The battery cooling structure according to claim 7 , wherein
The battery cooling structure is provided with a one-way valve that regulates the flow of air from the air conditioning outlet to the branch between the branch and the air conditioning outlet. The battery cooling structure according to claim 7 or 8 , wherein
The air conditioning duct is partially provided on the floor panel,
The part is provided with a rising portion rising from the bottom surface,
The cooling structure of a battery, wherein the one end of the branch portion is connected to the air conditioning outlet via the rising portion, and the other end extends from the bottom surface toward the intake duct. The battery cooling structure according to claim 9 ,
The battery cooling structure, wherein a filter member is provided at the branch portion. The battery cooling structure according to claim 10 , wherein
The battery and the intake duct are accommodated in a battery accommodating portion, and an in-accommodating air conditioning duct which constitutes a part of the air conditioning duct is also accommodated in the battery accommodating portion.
The cooling structure for a battery, wherein the air conditioning duct is provided with an upward inclination or an upward step between the branch portion and the in-housing air conditioning duct. The battery cooling structure according to any one of claims 9 to 11 , wherein
An exhaust pipe and a muffling section provided on the exhaust pipe are provided below the floor panel,
The cooling structure for a battery, wherein the branch portion is disposed at a position offset from the muffling portion in the front-rear direction.

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