JP7067102B2 - Cooling system - Google Patents

Description

The present disclosure relates to a cooling device, and more particularly to a cooling device for cooling a secondary battery in a battery pack mounted on a vehicle.

Conventionally, as a document in which a cooling device for cooling a secondary battery in a battery pack mounted on a vehicle is disclosed, for example, Japanese Patent Application Laid-Open No. 2015-217862 (Patent Document 1) can be mentioned.

In the cooling device disclosed in Patent Document 1, air in the vehicle interior is taken in from the gap between the door trim and the seat side garnish in the portion located on the side of the rear seat and sent into the battery pack.

JP-A-2015-217862

However, when the air in the vehicle interior is taken in from the gap between the door trim and the seat side garnish in the portion located on the side of the rear seat, the air flows around the lower limbs of the occupant sitting in the rear seat. This can cool the lower limbs and make the occupant feel uncomfortable.

The present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a cooling device capable of cooling a secondary battery while suppressing occupant discomfort. ..

The cooling device based on the present disclosure is a cooling device that cools the secondary battery in the battery pack by the air taken in from the vehicle interior, and has an intake device for sucking the air in the vehicle interior and an intake port. The intake passage for guiding the air taken in from the intake port by the intake device into the battery pack is provided, and the intake port is provided in the B pillar garnish.

According to the above configuration, since the intake port is provided in the B-pillar garnish away from the rear seats, the air in the vehicle interior can be sucked in at a position away from the occupants sitting in the rear seats. Therefore, the speed of the air flowing around the occupant can be reduced. As a result, the secondary battery in the battery pack can be cooled by the air sucked from the intake port while suppressing the occupant from feeling the discomfort caused by the air flow.

According to the present disclosure, it is possible to provide a cooling device capable of cooling a secondary battery while suppressing discomfort to an occupant.

It is a figure which shows the vehicle which provided the cooling device which concerns on embodiment. It is a figure which shows the B pillar garnish, the rear side door trim, and the seat side garnish in the state which the rear side door is open in an embodiment. It is a figure which looked at the structure around the rear side door trim in the state which the rear side door is closed in embodiment, as seen from the front side of a vehicle. FIG. 3 is a cross-sectional view taken along the line IV-IV shown in FIG.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments shown below, the same or common parts are designated by the same reference numerals in the drawings, and the description thereof will not be repeated.

FIG. 1 is a diagram showing a vehicle provided with a cooling device according to an embodiment. The vehicle 1 provided with the cooling device 10 according to the embodiment will be described with reference to FIG.

The vehicle 1 is a vehicle equipped with an electric motor as a prime mover for driving a vehicle such as a hybrid vehicle and an electric vehicle. The vehicle 1 includes a battery pack 2 and a cooling device 10.

The battery pack 2 supplies electric power to the electric motor for driving the vehicle. On the other hand, the electric power generated by the electric motor due to regenerative braking or the like is charged in the battery pack 2. The battery pack 2 is provided, for example, behind the rear seat 70. The installation position of the battery pack 2 is not limited to the rear of the rear seat 70, and may be below the rear seat 70, and the battery pack 2 can be appropriately installed.

The battery pack 2 has a longitudinal shape in the vehicle width direction. The battery pack 2 includes a battery case 3 and an assembled battery 4. The assembled battery 4 is housed in the battery case 3. The assembled battery 4 is configured by arranging a plurality of cells 5 side by side in one direction. The number of cells 5 is not particularly limited.

The cell 5 is a secondary battery such as a nickel-metal hydride battery or a lithium-ion battery. The cell 5 has, for example, a square shape.

The cooling device 10 is for cooling the assembled battery 4 in the battery pack 2 by the air taken in from the vehicle interior. More specifically, the cooling device 10 cools a plurality of cell cells 5 housed in the battery case 3. The cooling device 10 includes an intake device 20 and an intake passage 30.

The intake device 20 is a device for sucking air in the vehicle interior. As the intake device 20, for example, a fan or the like can be used. The intake device 20 is provided in the battery pack 2. When the intake device 20 operates, air in the vehicle interior is taken in from the intake port 41 of the intake passage 30 described later, and the air is blown into the battery pack 2. The air blown into the battery pack 2 is discharged from the discharge port (not shown) provided in the battery pack 2 after cooling the plurality of cell cells 5.

The intake passage 30 has an intake port 41 and is a passage for guiding the air taken in from the intake port 41 by the intake device 20 into the battery pack 2. The intake passage 30 includes a first intake passage 31, a second intake passage 32, and an anterior chamber portion 33. The detailed configuration of the intake passage 30 will be described later with reference to FIGS. 3 and 4 and the like.

The vehicle 1 includes a B-pillar garnish 40, a rear side door trim 50, and a seat side garnish 60.

FIG. 2 is a diagram showing a B-pillar garnish, a door trim, and a seat side garnish in a state where the side door is open in the embodiment. The B-pillar garnish 40, the rear side door trim 50, and the seat side garnish 60 will be described with reference to FIG.

The B-pillar garnish 40 is attached to a frame (B-pillar) at the boundary between the front seat door and the rear seat door. The B-pillar garnish 40 extends upward from the floor panel side of the vehicle 1.

The B-pillar garnish 40 is considerably far forward from the rear seat 70. When the occupant sits in the back seat 70, the B-pillar garnish 40 is located in front of the occupant.

The B-pillar garnish 40 is provided with an intake port 41, an anterior chamber portion 33, and a vent portion 42. The intake port 41 opens toward the vehicle interior. The intake port 41 is provided on the lower side of the B pillar garnish 40. The vent portion 42 is provided on the rear surface 40a of the B pillar garnish 40. The rear surface 40a faces the front wall portion 54 of the rear side door trim 50 in the closed state in which the rear side door is closed. The front chamber portion 33 is provided so as to connect the intake port 41 and the vent port 42. The front chamber portion 33 is a passage for communicating the vehicle interior with the first intake passage 31.

The seatside garnish 60 defines the lower side of the rear side door opening on the side of the rear seat 70. The seat side garnish 60 is provided substantially horizontally from the B pillar to the front end side of the seat cushion of the rear seat 70. The seat side garnish 60 curves upward from the side of the seat cushion of the rear seat 70 to the rear side thereof toward the rear.

The seat side garnish 60 has an facing surface 61 facing the bottom wall portion 52 of the rear side door trim 50 in a closed state in which the rear side door is closed. The facing surface 61 is provided with an opening 32a.

The rear side door trim 50 is attached to the vehicle interior side of the rear side door of the rear seat. The rear side door trim 50 is located on the rear side of the B pillar garnish 40 in the closed state where the rear side door is closed.

The rear side door trim 50 has an inner side wall portion 51 facing the vehicle interior and a bottom wall portion 52. The bottom wall portion 52 is provided along the seat side garnish 60 in the closed state.

The front side of the bottom wall portion 52 is provided substantially horizontally. The rear side of the bottom wall portion 52 is provided so as to be curved upward toward the rear. The bottom wall portion 52 is provided with a recess 53.

The recess 53 is provided so as to be recessed upward from the lower end of the inner side wall portion 51. The recess 53 is provided so as to face the rear side from the front end of the bottom wall portion 52.

FIG. 3 is a view of the configuration around the rear side door trim in a state where the rear side door is closed in the embodiment as viewed from the front side of the vehicle. FIG. 4 is a cross-sectional view taken along the line IV-IV shown in FIG. The details of the intake passage 30 will be described with reference to FIGS. 1, 3 and 4.

As shown in FIGS. 1, 3 and 4, the intake passage 30 connects the vehicle interior and the inside of the battery pack 2, and from the vehicle interior side, the front chamber portion 33, the first intake passage 31, and the first intake passage 31. The second intake passage 32 is arranged in this order.

As described above, the front chamber portion 33 connects the intake port 41 of the B pillar garnish 40 and the ventilation port portion 42.

The first intake passage 31 is formed by a recess 53 provided in the bottom wall portion 52 of the rear side door trim 50 and a facing surface 61 of the seat side garnish 60 facing the bottom wall portion 52 in a closed state in which the rear side door is closed. It is formed.

A sound absorbing member 80 is provided in the recess 53. The sound absorbing member 80 is provided so as to face the opening 32a. The sound absorbing member 80 absorbs the operating sound of the intake device 20. The sound absorbing member 80 is made of, for example, an inorganic fiber such as glass wool, a metal fiber such as aluminum, a synthetic resin foam such as a polyethylene resin, or the like.

The second intake passage 32 is formed by, for example, a duct. One end side of the second intake passage 32 is connected to the facing surface 61. The other end of the second intake passage 32 is connected to the battery case 3.

An opening 32a is provided on one end side of the second intake passage 32 so as to allow communication with the first intake passage 31. By connecting one end side of the second intake passage 32 to the facing surface 61, the opening 32a is provided on the facing surface 61.

A dustproof filter 90 is provided at the opening 32a. The dust filter 90 prevents foreign matter from entering the second intake passage 32. The dust filter 90 is provided so as to be replaceable. By opening the rear side door, the dustproof filter 90 is exposed to the outside, so that the dustproof filter 90 can be easily replaced.

In the closed state where the rear side door is closed, the opening surface 53a of the recess 53 located at the front end of the bottom wall portion 52 faces the ventilation port portion 42 of the B pillar garnish 40. As a result, the space surrounded by the recess 53 and the facing surface 61 communicates with the front chamber portion 33 via the vent portion 42. That is, the intake port 41 and the first intake passage 31 communicate with each other.

Further, the opening 32a is provided on the facing surface 61 of the portion facing the recess 53 in the closed state. As a result, in the closed state, the space surrounded by the recess 53 and the facing surface 61 communicates with the second intake passage 32 via the opening 32a.

As described above, when the rear side door is closed, the first intake passage 31 formed by the rear side door trim 50 and the seat side garnish 60 communicates with the intake port 41 and the second intake passage 32, so that the intake passage 30 becomes available. It is formed. Through the intake passage 30, air in the vehicle interior can be taken in from the intake port 41 and sent into the battery pack 2.

As described above, the intake port 41 is provided in the B-pillar garnish 40, which is considerably far in front of the rear seats. Therefore, when cooling the plurality of cells 5 in the battery pack 2, the air in the vehicle interior can be sucked in at a position away from the occupant sitting in the rear seat. This makes it possible to reduce the speed of the air flowing around the occupants. As a result, the secondary battery in the battery pack can be cooled by the air sucked from the intake port while suppressing the occupant from feeling the discomfort caused by the air flow.

Further, since the air in the vehicle interior is taken in from a position away from the occupant, the output of the intake device can be increased to take in more air. This makes it possible to improve the cooling performance of the battery pack 2.

Further, since the first intake passage 31 is formed by the recess 53 and the facing surface 61, the first intake passage 31 can be formed outside the inner side wall portion 51 of the rear side door trim 50. As a result, the first intake passage 31 is formed at a position invisible to the occupant, so that it is possible to prevent the design from being deteriorated.

Further, by forming the first intake passage 31 outside the inner side wall portion 51 of the rear side door trim 50, it is possible to block the space inside the vehicle near the occupant and the air flow path. This makes it possible to prevent the air passing through the intake passage 30 from coming into contact with the occupant. This also makes it possible to prevent the occupant from feeling the discomfort caused by the air flow.

Further, by providing the intake port 41 at the lower part of the B pillar garnish 40 which is difficult to see from the occupant, it is possible to reduce the deterioration of the appearance due to the dust adhering to the intake port 41.

In the above-described embodiment, the case where the recess 53 is provided in the bottom wall portion 52 of the rear side door trim 50 and the first intake passage 31 is formed by the recess 53 and the facing surface 61 will be illustrated and described. However, it is not limited to this. A recess is provided in the facing surface 61 of the seat side garnish 60, and the first intake passage 31 may be formed by the recess and the bottom wall portion 52 of the rear side door trim 50. In this case, it is preferable that the opening 32a of the second intake passage 32 is provided in the recess. As described above, the first intake passage 31 may be formed by the bottom wall portion and the facing surface so that air can flow.

As described above, the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is indicated by the scope of claims and includes all modifications within the meaning and scope equivalent to the scope of claims.

1 vehicle, 2 battery pack, 3 battery case, 4 sets of batteries, 5 single batteries, 10 cooling devices, 20 intake devices, 30 intake passages, 31 first intake passages, 32 second intake passages, 32a openings, 33 front chambers. , 40 pillar garnish, 40a rear surface, 41 intake port, 42 vent, 50 rear side door trim, 51 inner side wall, 52 bottom wall, 53 recess, 53a opening, 54 front wall, 60 seat side garnish, 61 Facing surface, 70 rear seats, 80 sound absorbing members, 90 dustproof filters.

Claims (1)

It is a cooling device that cools the secondary battery in the battery pack with the air taken in from the vehicle interior.
An intake device for inhaling air in the vehicle interior and
It has an intake port and includes an intake passage for guiding the air taken in from the intake port by the intake device to the battery pack.
The intake port is provided at the lower part of the B-pillar garnish in the portion located in front of the rear side door trim .
The intake passage is a recess provided in the front chamber portion provided in the B pillar garnish so as to communicate with the intake port, a recess provided in the bottom wall portion of the rear side door trim, communicating with the front chamber portion, and the said portion. The first intake passage portion formed by the facing surface of the seat side garnish facing the bottom wall portion, and the second intake passage portion formed by the duct connecting the first intake passage portion and the battery pack are included. Cooling system.

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