Vehicle under structure

Abstract

The present invention provides a vehicle lower structure capable of preventing a battery cell from being wetted by cooling water leaked from a water path when an impact is applied from the outside. A vehicle lower structure (1) is provided with: a battery unit (2); a battery lower cover (3); a battery upper cover (4); the junction box (10) is arranged at the upper part of the battery lower cover (3); a supply pipe (9) for supplying a refrigerant for cooling the junction box (10) and the battery cells (2); a water path cover (8) which covers the supply pipe (9); a waterproof case (6) that partitions the facing surfaces of the supply pipe (9) and the junction box (10); and an annular water stop member (5) that blocks the facing surfaces of the supply pipe (9) and the battery cells (2).

Description

Technical Field

[0001] The present disclosure relates to a vehicle underbody structure. Background Art

[0002] The following technique is disclosed in Patent Document 1: A battery control unit is disposed above a first cover, and the first cover is mounted in a state of covering an opening of a storage case having an opening and disposed below a rear seat of a vehicle. A battery module is stored in a closed space formed by the first cover and the storage case. In this technique, a sealing member such as a rubber seal or a sealing strip is disposed between an outer peripheral portion of the first cover and a fastening flange portion of the storage case, and the first cover and the storage case are brought into close contact via the sealing member.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2022-153107 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] In addition, in recent years, in a vehicle, miniaturization and improvement in commerciality have been achieved by integrating a power converter such as a battery control unit and a battery unit. Therefore, in the vehicle, a water passage is provided to cool the power converter.

[0008] However, in the above Patent Document 1, since the sealed portion where the sealing member is disposed is a single layer, when an impact is applied from the outside and the water passage is damaged, the battery unit may get wet due to the cooling water leaking from the water passage.

[0009] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a vehicle underbody structure capable of preventing a battery unit from getting wet due to cooling water leaking from a water passage when an impact is applied from the outside.

[0010] Means for Solving the Problems

[0011] In order to solve the above problems and achieve the object, the vehicle underbody structure of the present disclosure includes: a battery unit; a housing that has an opening and houses the battery unit; a cover that is mounted on the housing in a state of covering the opening; a junction box that is provided on an upper portion of the cover and controls the battery unit; and a supply pipe that supplies a refrigerant for cooling the junction box and the battery unit. Among them, the vehicle underbody structure includes: a first member that covers the supply pipe; a second member that partitions a facing surface where the supply pipe faces the junction box; and a third member that partitions a facing surface where the supply pipe faces the battery unit.

[0012] In addition, based on the above disclosure, the vehicle underbody structure of the present disclosure further includes a power conversion device that converts power from the battery unit. The housing has a first hole into which the supply pipe is inserted. The first member has a flow path through which at least the refrigerant can pass and is formed to cover a facing surface facing an upper surface of the power conversion device. The second member has a second hole into which the supply pipe can be inserted, is disposed on an upper surface of the cover, and houses the first member and the power conversion device. The supply pipe is connected to the first member via the first hole and the second hole to supply the refrigerant to the first member.

[0013] In addition, based on the above disclosure, in the vehicle underbody structure of the present disclosure, the junction box is disposed on an upper surface of the second member, and the third member partitions a facing surface where the supply pipe faces the battery unit between the cover and the housing.

[0014] Effects of the Invention

[0015] According to the present disclosure, an effect can be achieved in that, when an impact is applied from the outside and the water passage is damaged, it is possible to prevent the battery unit from getting wet due to cooling water leaking from the water passage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a schematic structure of a vehicle underbody structure according to an embodiment.

[0017] Figure 2 is a perspective view showing a schematic structure of an annular water stop member included in a vehicle underbody structure according to an embodiment.

[0018] Figure 3 is a diagram schematically illustrating the function of a sealing structure in a vehicle underbody structure according to an embodiment. DETAILED DESCRIPTION

[0019] Hereinafter, with reference to the accompanying drawings, the vehicle lower structure of the vehicle of the embodiment of the present disclosure is described. In addition, the constituent elements in the following embodiments include elements that can be easily replaced by those skilled in the art or substantially the same elements. In addition, the figures referred to in the following description are only schematically showing the shape, size and positional relationship to the extent that the content of the present disclosure can be understood. That is, the present disclosure is not limited to the shapes, sizes and positional relationships illustrated in the figures.

[0020] (Schematic structure of vehicle lower structure)

[0021] Figure 1 It is a schematic diagram showing a schematic structure of a vehicle lower structure according to an embodiment. Figure 1 The vehicle lower structure 1 of the vehicle shown includes at least a battery unit 2 , a battery lower cover 3 , a battery upper cover 4 , an annular waterproof member 5 , a waterproof housing 6 , a power conversion device 7 , a water channel cover 8 , a supply pipe 9 , a junction box 10 and a device cover 11 .

[0022] The battery cell 2 is configured using, for example, a lithium-ion secondary battery or a nickel-hydrogen secondary battery.

[0023] The battery lower cover 3 is formed in a box shape with an opening, and the battery unit 2 is stored in the storage portion 31. The battery lower cover 3 is formed in a box shape, and has a first hole 32 in the center for inserting the supply pipe 9. In addition, a water stop member 33 is provided between the first hole 32 and the supply pipe 9, and the water stop member 33 is used to prevent water from entering from the outside or water from the inside from leaking to the outside. In addition, in one embodiment, the battery lower cover 3 functions as a storage case.

[0024] The battery upper cover 4 is mounted in a state of covering the opening of the battery lower cover 3 via a waterproof member 41. The battery upper cover 4 has a waterproof case 6 disposed on the upper surface. The waterproof member 41 is formed using, for example, a rubber seal, a sealing strip, or the like.

[0025] The annular waterproof member 5 blocks the supply pipe 9 from the facing surface of the battery cell 2. Specifically, the annular waterproof member 5 blocks the supply pipe 9 from the facing surface of the battery cell 2 between the battery lower cover 3 and the battery upper cover 4. Figure 2 2 is a perspective view showing a schematic structure of the annular water stop member 5. Figure 2 As shown, the annular waterproof member 5 is formed in a ring shape with thickness. The annular waterproof member 5 may be a resin, a rubber seal such as EPDM (ethylene propylene rubber), a sealing strip, etc. In one embodiment, the annular waterproof member 5 functions as a third member.

[0026] The waterproof housing 6 is formed in a box shape and has a second hole 61 for inserting the supply pipe 9, and accommodates the power conversion device 7 and the water channel cover 8 inside. The waterproof housing 6 is arranged on the upper surface of the battery upper cover 4 via the annular water-stopping member 62. Moreover, the waterproof housing 6 separates the opposing surfaces of the water channel cover 8 including the supply pipe 9 and the junction box 10. That is, the interior of the waterproof housing 6 becomes a closed space through the battery lower cover 3, the battery upper cover 4, the annular water-stopping member 5, the water-stopping member 41 and the annular water-stopping member 5. Thus, the waterproof housing 6 prevents foreign objects from intruding from the outside relative to the power conversion device 7. In addition, in one embodiment, the waterproof housing 6 functions as a second member.

[0027] The power conversion device 7 is electrically connected to the battery unit 2 via a cable (not shown), and converts the power from the battery unit 2 into a predetermined voltage and outputs it, or converts direct current into alternating current and outputs it.

[0028] The water channel cover 8 is formed to cover a portion of the supply pipe 9. The water channel cover 8 is formed to cover the opposite surface of the power conversion device 7 to the upper surface of the power conversion device 7 in a manner to cover the supply pipe 9 exposed from the upper side of the power conversion device 7. The water channel cover 8 has one or more flow paths inside. In addition, in one embodiment, the water channel cover 8 functions as a first member.

[0029] Supply pipe 9 is disposed on a surface facing the upper surface of power conversion device 7 via first hole 32, second hole 61 and power conversion device 7. Supply pipe 9 cools junction box 10 and battery cell 2 by circulating a refrigerant such as water supplied from a pump (not shown).

[0030] The junction box 10 is provided on the upper part of the battery upper cover 4 and controls the battery unit 2. The junction box 10 is arranged on the upper surface of the waterproof case 6 and faces the water channel cover 8. The junction box 10 is connected to the battery unit 2 and the power conversion device 7 via cables (not shown).

[0031] The device cover 11 is disposed on the upper surface of the battery upper cover 4 via a waterproof member 111 , and is formed so as to cover the junction box 10 and the waterproof case 6 .

[0032] The sealing structure in the vehicle lower structure 1 configured as described above will be described. Figure 3 1 is a diagram schematically illustrating the function of the sealing structure in the vehicle lower structure 1 .

[0033] like Figure 3As shown, in the case of water leakage near the power conversion device 7, the portion A1 between the supply pipe 9 and the annular water stop member 5 is doubly sealed by the supply pipe 9 and the annular water stop member 5. Thus, in the vehicle lower structure 1, even in the case of water leakage from the supply pipe 9, water can be prevented from entering the space K1 of the storage portion 31 storing the battery unit 2.

[0034] Furthermore, since the water channel cover 8 and the waterproof housing 6 are doubly sealed at the portion A2 between the water channel cover 8 and the waterproof housing 6 , even if water leaks from the supply pipe 9 or the water channel cover 8 , water can be prevented from entering the space K2 where the junction box 10 is stored.

[0035] According to one embodiment described above, since the annular water-stopping member 5 separates the facing surfaces of the supply pipe 9 and the battery cell 2 and performs doubly sealing, when an impact is applied from the outside and the supply pipe 9 is damaged, the battery cell 2 can be prevented from being soaked by cooling water leaking from the supply pipe 9.

[0036] In addition, according to one embodiment, since the waterproof shell 6 is arranged on the upper surface of the battery upper cover 4 via the annular water-stopping component 62, and the power conversion equipment 7 and the water channel cover 8 are accommodated inside, and the water channel cover 8 including the supply pipe 9 is separated from the opposite surface of the junction box 10, it is possible to prevent the junction box 10 from being soaked by water due to the cooling water leaking from the supply pipe 9.

[0037] Further effects and variations can be easily derived by those skilled in the art. The wider scope of the present invention is not limited to the specific detailed and representative embodiments shown and described above. Therefore, various changes can be made without departing from the spirit or scope of the overall inventive concept defined by the attached claims and their equivalents.

[0038] As mentioned above, some embodiments of the present application have been described in detail based on the accompanying drawings, but these are only examples, represented by the forms described in the inventive content section of the present invention, and the present invention can be implemented in other forms with various modifications and improvements based on the knowledge of those skilled in the art.

[0039] Description of Reference Numerals

[0040] 1 Vehicle lower structure

[0041] 2 Battery Cells

[0042] 3 Battery lower cover

[0043] 4 Battery cover

[0044] 5 Annular water stop components

[0045] 6 Waterproof housing

[0046] 7 Power conversion device

[0047] 8 Waterway cover

[0048] 9 Supply pipe

[0049] 10 Junction box

[0050] 11 Equipment cover

[0051] 31 Storage part

[0052] 32 First hole

[0053] 33, 41, 111 Water stop member

[0054] 61 Second hole

[0055] 62 Annular water stop member.

Claims

1. A vehicle underbody structure, the vehicle underbody structure comprising: A battery unit; A storage housing having an opening and storing the battery unit; A cover mounted on the storage housing in a state of covering the opening; A junction box provided on an upper portion of the cover for controlling the battery unit; And A supply pipe for supplying a refrigerant for cooling the junction box and the battery unit, wherein, The vehicle underbody structure comprises: A first member covering the supply pipe; A second member partitioning a facing surface where the supply pipe faces the junction box; and A third member partitioning a facing surface where the supply pipe faces the battery unit.

2. The vehicle underbody structure according to claim 1, wherein, The vehicle underbody structure further comprises a power conversion device for converting power from the battery unit, The storage housing has a first hole into which the supply pipe is inserted, The first member has a flow path through which at least the refrigerant can pass and is formed to cover a facing surface facing an upper surface of the power conversion device, The second member has a second hole into which the supply pipe can be inserted, is disposed on an upper surface of the cover, and houses the first member and the power conversion device, The supply pipe is connected to the first member via the first hole and the second hole to supply the refrigerant to the first member.

3. The vehicle underbody structure according to claim 2, wherein, The junction box is disposed on an upper surface of the second member, The third member partitions a facing surface where the supply pipe faces the battery unit between the cover and the storage housing.

Images