Battery cooling air exhaust device

Abstract

Provided is a discharge device comprising an exhaust duct 10 that extends, in a lateral direction of a vehicle V, from a battery 1 mounted to a lower part of the vehicle V to a trim space 2, wherein: the exhaust duct 10 is provided with a partitioning part 11 which extends in the exhaust direction of the exhaust duct 10, and a front side flow path 12F and rear side flow path 12R which branch to the front and rear of the vehicle V; the rear side flow path 12R has a cross-sectional area smaller than the cross-sectional area of the front side flow path 12F; and a merging region S of the rear side flow path 12R and the front side flow path 12F is provided at the outlet side of the exhaust duct 10. Negative pressure of air A1 that flows through the rear side flow path 1 draws air A2 that flows through the front side flow path 12F, and an exhaust flow A3 toward the rear of the vehicle is formed in the trim space 2.

Description

[Technical Field]

[0001] The present invention relates to a battery cooling air discharge device used to discharge cooling air that has cooled a battery in a vehicle such as an automobile. [Background technology]

[0002] A conventional battery cooling air exhaust device is described, for example, in Patent Document 1. The battery cooling air exhaust device described in Patent Document 1 exhausts cooling air that has cooled a battery located in the lower part of the vehicle compartment to the outside of the vehicle through the vehicle's draft lid, and is equipped with an exhaust duct. The exhaust duct is formed between the floor panel and the interior material, extends along the direction in which the battery and draft lid are arranged, and has one end connected to the battery and a trim space that communicates with the outside of the vehicle via the draft lid, and the other end connected to the trim space at a position between the battery and the draft lid. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-190044 Summary of the Invention [Problem to be solved by the invention]

[0004] The conventional battery cooling air exhaust device described above can reduce costs by shortening the overall length of the exhaust duct, but there is a possibility that heat may stagnate near the seat belt anchor on the downstream side, so further improvement was desired.

[0005] The present invention has been made in consideration of the above-mentioned conventional situation, and aims to provide a battery cooling air discharge device that can form an exhaust flow toward the rear of the vehicle within the trim space and prevent heat from accumulating on the downstream side. [Means for solving the problem]

[0006] The battery cooling air discharge device according to the present invention is a device disposed between a battery mounted under a vehicle and the trim space of the vehicle to discharge cooling air for the battery. This discharge device has an exhaust duct that extends from the battery in the lateral direction of the vehicle to the trim space. The exhaust duct has a partition extending in the exhaust direction, and a front-side flow path and a rear-side flow path that are branched by the partition into the front and rear of the vehicle. The discharge device has a cross-sectional area of ​​the rear-side flow path that is smaller than the cross-sectional area of ​​the front-side flow path, and a confluence area of ​​the rear-side flow path and the front-side flow path at the outlet side of the exhaust duct. The exhaust duct has a guide wall at the outlet of the front flow passage, with the confluence area side being a concave curved surface. It is characterized by the fact that

[0007] The battery cooling air discharge device having the above configuration discharges battery cooling air through the exhaust duct into the trim space. At this time, the cross-sectional area of ​​the rear-side passage branched by the partition is smaller than the cross-sectional area of ​​the front-side passage, so the speed of the air flowing through the rear-side passage increases and the pressure decreases. As a result, in the confluence area on the outlet side, the exhaust duct draws in the air that has passed through the front-side passage due to the negative pressure of the air that has passed through the rear-side passage and releases it into the trim space. At this time, the battery cooling air discharge device draws air from the front side of the vehicle toward the rear side of the vehicle in the confluence area, so the air released into the trim space flows toward the rear of the vehicle. [Effects of the Invention]

[0008] In this way, the battery cooling air discharge device according to the present invention actively forms an exhaust flow toward the rear of the vehicle within the trim space, thereby preventing heat from accumulating on the downstream side. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a horizontal cross-sectional view illustrating a first embodiment of a battery cooling air discharge device according to the present invention. [Figure 2] FIG. 4 is a plan view showing the battery cooling air exhaust device with the interior material removed. DETAILED DESCRIPTION OF THE INVENTION

[0010] First Embodiment The battery cooling air discharge device shown in Figures 1 and 2 is disposed between a battery 1 mounted under a vehicle V and a trim space 2 of the vehicle V, and discharges battery cooling air, i.e., air used to cool the battery 1. The illustrated discharge device is disposed on a floor panel P of the vehicle V, between a front seat FS and a rear seat RS of the vehicle V. Note that Figures 1 and 2 do not show interior materials that form the floor of the vehicle interior.

[0011] The battery 1 is housed in a case (not shown) and is cooled by air blown by a fan 3, with battery cooling air being discharged from an exhaust port provided in the case. The illustrated trim space 2 is a space formed below the rear kicking trim KT of the vehicle V. For convenience, each figure shows a draft lid 4 in the trim space 2 that exhausts air to the outside of the vehicle. In reality, the trim space 2 communicates with a side trim space in the trunk room at the rear of the vehicle, and the draft lid 4 is located in this side trim space.

[0012] The exhaust device includes an exhaust duct 10 that extends from the battery 1 in the lateral direction of the vehicle V to the trim space 2. The exhaust duct 10 includes a partition 11 that extends in the exhaust direction, and a front-side flow path 12F and a rear-side flow path 12R that are branched by the partition 11 to the front and rear of the vehicle V, with the rear-side flow path 12R having a smaller cross-sectional area than the front-side flow path 12F.

[0013] The partition 11 is not particularly limited in configuration as long as it separates the front and rear flow paths 12F, 12R, but is formed of a wall portion integrally molded within the exhaust duct 10. Furthermore, the exhaust duct 10 has a confluence region S of the rear flow path 12R and the front flow path 12F on its outlet side.

[0014] The exhaust duct 10 in the illustrated example includes a connecting flow path pipe 13 that connects to the exhaust port of the battery 1 and extends toward the rear of the vehicle (downward in the cross-sectional view), and a main flow path pipe 14 that bends at an approximately right angle from the connecting flow path pipe 13 and extends laterally of the vehicle.

[0015] The exhaust duct 10 has a partition 11 formed inside the main flow path pipe 14 along its longitudinal direction, forming the aforementioned front flow path 12F and rear flow path 12R, as well as the confluence area S, and has an exhaust port 15 at its end that opens into the trim space 2.

[0016] Furthermore, the exhaust duct 10 has a guide wall 16 at the outlet of the front-side flow path 12F, the guide wall 16 having a concave curved surface on the side of the merging region S. In the horizontal view shown in FIG. 1 , this guide wall 16 is formed continuously with a wall portion 17 of the main flow path pipe 14 on the vehicle front side, and has a roughly semicircular shape that reaches the front end 15F of the exhaust port 15.

[0017] In contrast, a wall portion 18 of the main flow passage pipe 14 on the vehicle rear side continues to the connecting flow passage pipe 13 and reaches a rear end 15R of the exhaust port 15. This exhaust port 15 has a shape in which a front end 15F on the guide wall 16 side protrudes farther into the trim space 2 than the rear end 15R.

[0018] Furthermore, in a more preferred embodiment of the exhaust device, the front-side flow passage 12F can be shaped so that its cross-sectional area gradually increases in the exhaust direction. In the illustrated example, the wall portion 17 on the vehicle front side of the exhaust duct 10 is slightly inclined in the length direction of the partition portion 11, thereby gradually increasing the cross-sectional area. The main flow passage pipe 14 of this exhaust duct 10 is, for example, a flattened rectangular pipe with a uniform thickness (height) overall.

[0019] The battery cooling air discharge device having the above-described configuration discharges battery cooling air through the exhaust duct 10 into the trim space 2. At this time, the cross-sectional area of ​​the rear-side flow path 12R branched off from the exhaust duct 10 by the partition 11 is smaller than the cross-sectional area of ​​the front-side flow path 12F, so the speed of air A1 flowing through the rear-side flow path 12R increases and the pressure decreases. As a result, in the confluence region S on the outlet side, the exhaust duct 10 sucks in air A2 that has passed through the front-side flow path 12F due to the negative pressure of air A1 that has passed through the rear-side flow path 12R, and releases both air A1 and A2 into the trim space 2.

[0020] At this time, the battery cooling air discharge device draws air from the front side of the vehicle toward the rear side of the vehicle in the confluence area S, so the air discharged into the trim space 2 flows toward the rear of the vehicle as shown by arrow A3. This air A3 is finally discharged outside the vehicle through the draft lid 4 as shown by arrow A4.

[0021] In this way, the battery cooling air exhaust device actively forms an exhaust flow toward the rear of the vehicle within the trim space 2, thereby preventing heat from accumulating on the downstream side, for example, near the seat belt anchor.

[0022] In addition, as shown in Figure 1, in the above-mentioned battery cooling air exhaust device, the exhaust duct 10 is positioned below the interior material near the feet of the rear seat RS, and the partition portion 11 acts as a reinforcing portion, preventing deformation of the exhaust duct 10.

[0023] Furthermore, in the battery cooling air discharge device, exhaust duct 10 has guide wall 16 at the outlet of front-side flow path 12F, with the surface facing junction region S as a concave curve. As a result, in the discharge device, air A2 that has passed through front-side flow path 12F is diffused in junction region S and rectified by moving along guide wall 16, which, together with suction due to the negative pressure of air A1 that has passed through rear-side flow path 12R, smoothly forms air flow A3 toward the rear of the vehicle.

[0024] Furthermore, the battery cooling air discharge device described above gradually increases the cross-sectional area of ​​the front-side flow passage 12F in the exhaust direction, thereby gradually decreasing the speed of the air A2 flowing through the front-side flow passage 12F and suppressing the noise of the air being blown out. Moreover, the discharge device increases the pressure difference with the air A1 flowing through the rear-side flow passage 12R, thereby enhancing the suction effect of the air A1 that has passed through the rear-side flow passage 12R.

[0025] Furthermore, in the battery cooling air discharge device, the trim space 2 is a space formed below the rear kicking trim KT of the vehicle V. As a result, the discharge device prevents air from flowing forward of the vehicle, and can prevent air leakage from, for example, a seat belt retraction hole in the center pillar, and by using the trim space 2 as a duct, it is possible to reduce the size, weight, and cost of the exhaust duct 10.

[0026] Furthermore, in the above-mentioned battery cooling air exhaust device, the trim space 2 is connected to the draft lid 4 located at the rear of the vehicle V, so the internal space of the vehicle V can be used as a circulation path to smoothly exhaust the battery cooling air outside the vehicle.

[0027] The battery cooling air discharge device according to the present invention is not limited in configuration to the above-described embodiment, and can be modified as appropriate within the scope of the present invention. [Explanation of symbols]

[0028] 1 battery 2 Trim space 4 Draft 10 Exhaust duct 11 Partition 12F Front flow path 12R Rear flow path 16 Guide Wall KT rear kicking trim S confluence area V vehicle

Claims

1. A device that is disposed between a battery mounted under a vehicle and a trim space of the vehicle and that exhausts cooling air for the battery, an exhaust duct extending from the battery in a lateral direction of the vehicle to the trim space, the exhaust duct including a partition extending in the exhaust direction, and a front flow path and a rear flow path branched by the partition into front and rear flow paths, the rear flow passage has a cross-sectional area smaller than the cross-sectional area of ​​the front flow passage, a joining region where the rear-side flow path and the front-side flow path join together at an outlet side of the exhaust duct, The battery cooling air discharge device is characterized in that the exhaust duct has, at the outlet of the front-side flow path, a guide wall whose surface on the confluence area side is a concave curved surface.

2. A device that is disposed between a battery mounted under a vehicle and a trim space of the vehicle and that exhausts cooling air for the battery, an exhaust duct extending from the battery in a lateral direction of the vehicle to the trim space, the exhaust duct including a partition extending in the exhaust direction, and a front flow path and a rear flow path branched by the partition into front and rear flow paths, the rear flow passage has a cross-sectional area smaller than the cross-sectional area of ​​the front flow passage, a joining region where the rear-side flow path and the front-side flow path join together at an outlet side of the exhaust duct, The battery cooling air discharge device is characterized in that the front side flow passage has a shape in which its cross-sectional area gradually increases in the exhaust direction.

3. 2. The battery cooling air discharge device according to claim 1, wherein the front side flow passage has a cross-sectional area that gradually increases in the exhaust direction.

4. 4. The battery cooling air discharge device according to claim 1, wherein the trim space is a space formed below a rear kicking trim of the vehicle.

5. 5. The battery cooling air discharge device according to claim 4, wherein the trim space is in communication with a draft cover disposed at the rear of the vehicle.

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