Vehicle and battery pack

Abstract

The utility model relates to a vehicle and a battery pack. A vehicle includes a vehicle body including a vehicle body bottom, and a battery pack attached to the vehicle body below the vehicle body bottom. The battery pack includes an upper surface portion provided so as to face the bottom of the vehicle body, and a heat insulator (attachment member) attached to the upper surface portion. The upper surface portion is provided with a protruding portion that protrudes toward the bottom of the vehicle body. Holes into which the protrusions are inserted are formed in the heat insulating material. The shortest distance between the convex portion and the vehicle body bottom portion is smaller than the minimum value of the thickness of the heat shield.

Description

Technical Field

[0001] The present disclosure relates to a vehicle and a battery pack. Background Art

[0002] Japanese Unexamined Patent Application Publication No. 2019-046748 discloses a battery pack mounted on a vehicle body frame from the bottom side of the vehicle. Components such as a heat conduction member, a radiator, and a heat insulating sheet are mounted on the battery pack. Summary of the Utility Model

[0003] In a case where an external force is applied to the battery pack described in Japanese Unexamined Patent Application Publication No. 2019-046748, components such as a heat conduction member, a radiator, and a heat insulating sheet (mounting components) may fall off from the vehicle. The external force is a vibration load, an impact load, chemical attachment, etc.

[0004] The present disclosure has been completed to solve the above problems, and an object thereof is to provide a vehicle and a battery pack that can suppress the mounting components mounted on the battery pack from falling off from the vehicle.

[0005] The vehicle according to the first aspect of the present disclosure includes:

[0006] a vehicle body including a vehicle body bottom; and

[0007] a battery pack mounted below the vehicle body bottom.

[0008] The battery pack includes:

[0009] an upper surface portion provided to face the vehicle body bottom; and

[0010] mounting components mounted on the upper surface portion.

[0011] A convex portion protruding toward the vehicle body bottom is provided on the upper surface portion.

[0012] A hole portion into which the convex portion is inserted is formed in the mounting component.

[0013] The shortest distance between the convex portion and the vehicle body bottom is less than the minimum value of the thickness of the mounting component.

[0014] In the vehicle according to the first aspect of the present disclosure, as described above, the shortest distance between the convex portion and the vehicle body bottom is less than the minimum value of the thickness of the mounting component. Thus, it is possible to suppress the mounting component from passing through the gap between the convex portion and the vehicle body bottom corresponding to the shortest distance. As a result, it is possible to suppress the mounting components mounted on the battery pack from falling off from the vehicle.

[0015] Preferably, the vehicle according to the first aspect described above includes:

[0016] an engine; and

[0017] An exhaust pipe that exhausts the gas discharged from the engine.

[0018] The exhaust pipe is disposed below the bottom of the vehicle body.

[0019] The mounting member is a heat insulating member.

[0020] If configured in this way, it is possible to suppress the transfer of radiant heat from the exhaust pipe to the battery pack by the mounting member (heat insulating member). Therefore, suppressing the detachment of the mounting member is effective in suppressing the temperature rise of the battery pack due to the above-mentioned radiant heat (the components in the battery pack exceeding the allowable temperature due to radiant heat).

[0021] In this case, preferably, the mounting member is disposed at a position in the front-rear direction of the vehicle body that is forward of the center of the battery pack.

[0022] Here, the engine room of the vehicle is generally disposed on the front side of the vehicle body. Therefore, the front side portion of the battery pack is relatively close to the engine room and is thus easily affected by the air heated by the engine. Therefore, disposing the mounting member (heat insulating member) on the front side of the battery pack is effective in suppressing the temperature rise of the battery pack due to the air heated by the engine (the components in the battery pack exceeding the allowable temperature).

[0023] In the vehicle according to the first aspect, preferably, the convex portion is separated from the vehicle body bottom.

[0024] Thereby, it is possible to suppress the transfer of the vibration of the vehicle body to the battery pack via the convex portion. Therefore, it is possible to suppress both the detachment of the mounting member from the vehicle (battery pack) and the damage to the battery pack and the detachment from the vehicle body caused by the vibration of the vehicle body.

[0025] The battery pack according to the second aspect of the present disclosure is a battery pack mounted on a vehicle, the battery pack including:

[0026] A battery module;

[0027] A housing portion that houses the battery module and includes an upper surface portion; and

[0028] A mounting member that is mounted on the upper surface portion.

[0029] The upper surface portion is provided so as to face the vehicle body bottom when the housing portion is mounted on the vehicle.

[0030] A convex portion that protrudes toward the vehicle body bottom side is provided on the upper surface portion when the housing portion is mounted on the vehicle.

[0031] A hole portion into which the convex portion is inserted is formed in the mounting member.

[0032] When the housing part is installed on the vehicle, the shortest distance between the convex part and the bottom of the vehicle body is less than the minimum value of the thickness of the mounting member.

[0033] In the battery pack according to the second aspect of the present disclosure, as described above, the shortest distance between the convex part and the bottom of the vehicle body is less than the minimum value of the thickness of the mounting member. Thus, it is possible to provide a battery pack capable of suppressing the mounting member mounted on the battery pack from falling off the vehicle.

[0034] According to the present disclosure, it is possible to suppress the mounting member mounted on the battery pack from falling off the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Hereinafter, the features, advantages, and technical and industrial significance of the exemplary embodiments of the present invention will be described with reference to the drawings, in which like reference numerals denote like elements, and in the drawings:

[0036] Figure 1 is a side view showing the configuration of a vehicle according to an embodiment;

[0037] Figure 2 is a plan view obtained by observing a vehicle according to an embodiment from below;

[0038] Figure 3 is a cross-sectional view showing the internal configuration of a battery pack according to an embodiment;

[0039] Figure 4 is a plan view obtained by observing a battery pack according to an embodiment from above;

[0040] Figure 5 is along Figure 4 sectional view taken along line V-V;

[0041] Figure 6 is along Figure 4 sectional view taken along line VI-VI;

[0042] Figure 7 is in Figure 6 local enlarged view near the part where the distance between the convex part and the bottom of the vehicle body becomes the shortest;

[0043] Figure 8 is a view showing a heat insulating member and a convex part according to a modification of an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] Use Figures 1 to 7 , the vehicle and the battery pack of the present embodiment will be described. In the Figures 1 to 7 configuration shown, the same or substantially the same components are labeled with the same reference numerals and repeated descriptions are omitted. In addition, in Figure 1Among them, "U" represents the upward direction, "D" represents the downward direction, "L" represents the left direction, and "R" represents the right direction.

[0045] Figure 1 FIG. is a schematic view showing a vehicle 100 equipped with the battery pack 20 of the present embodiment. The vehicle 100 includes a vehicle body 10, a battery pack 20, a drive device 30, and a fuel tank 40. The vehicle 100 is, for example, a PHEV (Plug-in Hybrid Electric Vehicle). The vehicle body 10 includes a vehicle body bottom 50. The vehicle body bottom 50 is provided at the lower part (bottom) of the vehicle body 10.

[0046] An engine compartment 60 and a passenger compartment 70 are formed in the vehicle body 10. The engine compartment 60 is formed in front of the passenger compartment 70. The engine compartment 60 is a body space in which an engine 31 described later is mounted. The passenger compartment 70 is, for example, a space for passengers to ride.

[0047] The drive device 30 includes an engine 31, a rotating electric machine MG1, a rotating electric machine MG2, and a PCU 32. The PCU 32 includes, for example, two converters and a converter. One converter is electrically connected to the rotating electric machine MG1, and the other converter is connected to the rotating electric machine MG2. The converter is electrically connected to the battery pack 20. Further, the rotating electric machine MG2 mainly functions as a motor for rotating drive wheels, and the rotating electric machine MG1 mainly functions as a generator. The engine 31 is driven using fuel supplied from the fuel tank 40 and generates a driving force for rotating the drive wheels.

[0048] The battery pack 20 and the fuel tank 40 are respectively mounted on the vehicle body 10 (vehicle body bottom 50) below the vehicle body bottom 50. The fuel tank 40 is disposed on the rear side of the battery pack 20.

[0049] Figure 2 is a bottom view of the vehicle 100 looking up, Figure 3 is a plan view (cross-sectional view) schematically showing the battery pack 20 and its surrounding configuration. In addition, Figure 3 is a plan view when observing the battery pack 20 from the upper side.

[0050] The battery pack 20 includes a housing case 21, a plurality of (four in the present embodiment) power storage modules 22, a battery ECU 23 (refer to Figure 3 ), and a junction box 24 (refer to Figure 3 ). The housing case 21 houses the plurality of power storage modules 22, the battery ECU 23, and the junction box 24. In addition, the housing case 21 and the power storage module 22 are respectively examples of the "housing part" and "battery module" of the present disclosure.

[0051] As Figure 3As shown, the housing case 21 includes a front end face 21A, a rear end face 21B, side faces 21C, 21D, and an inclined side face 21E. In Figure 3 the example shown, the side face 21C is located on the left side. The side faces 21D and the inclined side face 21E are located on the opposite side of the side face 21C, and the side faces 21D and the inclined side face 21E are located on the right side. In addition, the inclined side face 21E is connected to the top end of the side face 21D, and the inclined side face 21E is inclined so as to approach the side face 21C as it goes forward.

[0052] Four power storage modules 22 are arranged at intervals in the width direction (left - right direction) of the vehicle 100. Each power storage module 22 is electrically connected in series with each other.

[0053] In addition, each power storage module 22 includes a plurality of power storage units. The plurality of power storage units of each power storage module 22 are arranged in the front - rear direction of the vehicle 100. Each power storage unit is, for example, a secondary battery such as a lithium - ion battery, a capacitor, or the like.

[0054] The battery ECU 23 and the junction box 24 are respectively provided in front of the power storage module 22.

[0055] High - voltage wiring 25A, 25B and high - voltage wiring 26A, 26B are connected to the junction box 24. The high - voltage wiring 25A, 25B electrically connect the junction box 24 and the PCU 32. The high - voltage wiring 26A, 26B electrically connect the junction box 24 and the power storage module 22. A relay is provided in the junction box 24. The junction box 24 switches the electrical connection of the high - voltage wiring 25A, 25B and the high - voltage wiring 26A, 26B.

[0056] A signal wiring 27 including signal lines and the like is connected to the battery ECU 23, and the signal wiring 27 electrically connects the battery ECU 23 and an ECU (not shown) of the vehicle 100.

[0057] The vehicle 100 includes an exhaust pipe 80 and a cooling circuit 90. The exhaust pipe 80 is connected to the engine 31 (refer to Figure 1 ). The exhaust pipe 80 discharges the gas discharged from the engine 31. The exhaust pipe 80 is arranged below the vehicle body bottom 50. The exhaust pipe 80 is formed so as to pass below the vehicle body bottom 50 and extend rearward from the engine 31. The exhaust pipe 80 is arranged along the side face 21D and the inclined side face 21E of the battery pack 20.

[0058] The cooling circuit 90 includes a compressor 91, a condenser 92, a storage tank 93, expansion valves 94 (94A, 94B), cooling pipes 95A, 95B, and a plurality of refrigerant pipes 96A, 96B, 96C, 96D. The refrigerant circulates in the cooling circuit 90. The refrigerant flows along the flow direction C.

[0059] The expansion valve 94A is connected to a refrigerant pipe 96C and a cooling pipe 95A. The refrigerant pipe 96C is connected to the storage tank 93. The expansion valve 94B is connected to the refrigerant pipe 96C and the cooling pipe 95B. In addition, the expansion valves 94A and 94B are respectively housed in the housing 21.

[0060] The cooling pipes 95A and 95B are arranged on the lower surface of the power storage module 22 to cool the power storage module 22. In the flow direction C, the downstream ends of the cooling pipes 95A and 95B are connected to the refrigerant pipe 96D. The refrigerant pipe 96D is connected to the compressor 91 provided outside the battery pack 20.

[0061] The refrigerant pipe 96C and the refrigerant pipe 96D are respectively led out from the inside of the housing 21 to the outside of the housing 21. The refrigerant pipe 96C and the refrigerant pipe 96D are respectively led out to the outside from the front end face 21A of the housing 21.

[0062] Figure 4 is a plan view obtained by observing the battery pack 20 from above. The battery pack 20 (housing 21) includes an upper surface portion 21a. The upper surface portion 21a is a surface arranged in an upward direction. The upper surface portion 21a is arranged in a state where the battery pack 20 (housing 21) is mounted on the vehicle 100 and faces the vehicle body bottom 50 (refer to Figure 1 ).

[0063] The battery pack 20 includes a heat insulating member 28. The heat insulating member 28 is mounted on the upper surface portion 21a. Specifically, the heat insulating member 28 is attached to the upper surface portion 21a by an adhesive material or double-sided tape. The heat insulating member 28 is formed in a sheet shape. In addition, the heat insulating member 28 is an example of the "mounting member" of the present disclosure.

[0064] A convex portion 21b is provided on the upper surface portion 21a. The convex portion 21b protrudes toward the vehicle body bottom 50 side (upper side) in a state where the battery pack 20 (housing 21) is mounted on the vehicle 100.

[0065] A hole portion 28a is formed in the heat insulating member 28. The convex portion 21b of the upper surface portion 21a is inserted into the hole portion 28a. Specifically, the convex portion 21b penetrates through the hole portion 28a and protrudes toward the vehicle body bottom 50 side more than the heat insulating member 28.

[0066] The heat insulating member 28 is arranged so as to surround the convex portion 21b. Specifically, no cut portion (notch) is formed in the heat insulating member 28, and it has an annular shape that surrounds the convex portion 21b over the entire circumference. In addition, the hole portion 28a is formed near the center of the heat insulating member 28 in a plan view.

[0067] An expansion valve 94 is disposed in the internal space of the housing case 21 corresponding to the convex portion 21b. In the above internal space, both the expansion valves 94A and 94B may be disposed, or either one of the expansion valves 94A and 94B may be disposed. In Figure 4 In the following and subsequent descriptions, the expansion valves 94A and 94B are not distinguished and are described as the expansion valve 94.

[0068] Figure 5 is a cross-sectional view along the Figure 4 V-V line. As Figure 5 shown, a wind guide portion 51 is formed between the convex portion 21b and the vehicle body bottom portion 50. The air heated by the engine 31 (refer to Figure 1 ) flows through the wind guide portion 51 toward the rear side of the vehicle 100.

[0069] In addition, the vehicle 100 (vehicle body 10) includes a bottom cover 12 disposed below the battery pack 20 (housing case 21).

[0070] Figure 6 is a cross-sectional view along the Figure 5 VI-VI line. As Figure 5 and Figure 6 shown, the convex portion 21b is separated from the vehicle body bottom portion 50. In other words, the convex portion 21b is provided on the battery pack 20 in a non-contact state with the vehicle body bottom portion 50. Thus, even when the battery pack 20 is lifted upward due to interference with a falling object or the like from the vehicle 100, the reaction force from the vehicle body bottom portion 50 to the battery pack 20 can be suppressed from being transmitted. In addition, the heat insulating member 28 is also separated from the vehicle body bottom portion 50.

[0071] Here, in a conventional vehicle, in a case where an external force (vibration load, impact load, chemical attachment, etc.) is applied to the battery pack, sometimes members such as the heat insulating member fall off from the vehicle.

[0072] Therefore, in the present embodiment, as Figure 7 shown, the shortest distance D1 between the convex portion 21b and the vehicle body bottom portion 50 is smaller than the minimum value tmin of the thickness t of the heat insulating member 28. In addition, as described above, the convex portion 21b is separated from the vehicle body bottom portion 50, and thus the shortest distance D1 is larger than 0.

[0073] In addition, in the Figure 7 shown example, the portion 21c of the convex portion 21b corresponding to the shortest distance D1 and the portion 28b of the heat insulating member 28 corresponding to the minimum value tmin are arranged in the front-rear direction of the vehicle 100.

[0074] Refer to again Figure 4, the heat insulating member 28 is disposed at a position in front of the center Pm of the battery pack 20 in the front-rear direction of the vehicle body 10 (vehicle body 10). In other words, the heat insulating member 28 is disposed at a position on the engine 31 (refer to Figure 1 ) side in the front-rear direction relative to the center Pm of the battery pack 20.

[0075] Specifically, the heat insulating member 28 is disposed at a position between the side surface 21C and the inclined side surface 21E in the left-right direction of the vehicle 100. In addition, the inclined side surface 21E is provided at a position on the front side relative to the center Pm.

[0076] As described above, in the present embodiment, the shortest distance D1 between the convex portion 21b and the vehicle body bottom 50 is smaller than the minimum value tmin of the thickness t of the heat insulating member 28. Thus, even for the portion 28b of the heat insulating member 28 corresponding to the minimum value tmin, it cannot pass through the gap between the convex portion 21b (portion 21c) corresponding to the shortest distance D1 and the vehicle body bottom 50. As a result, it is possible to prevent the convex portion 21b from coming out of the hole portion 28a. Thus, it is possible to prevent the heat insulating member 28 from detaching from the vehicle 100 (battery pack 20).

[0077] In the above-described embodiment, an example in which the heat insulating member 28 is mounted on the battery pack 20 is shown, but the present disclosure is not limited thereto. Other members (such as a buffer member, etc.) may be mounted on the battery pack 20 instead of the heat insulating member 28.

[0078] In the above-described embodiment, an example in which the heat insulating member 28 is disposed at a position in front of the center Pm of the battery pack 20 in the front-rear direction of the vehicle 100 is shown, but the present disclosure is not limited thereto. The heat insulating member 28 may also be disposed at a position behind the center Pm of the battery pack 20 in the front-rear direction.

[0079] In the above-described embodiment, an example in which the convex portion 21b is separated from the vehicle body bottom 50 is shown, but the present disclosure is not limited thereto. The convex portion 21b may also be in contact with the vehicle body bottom 50.

[0080] In the above-described embodiment, an example in which the expansion valve 94 is disposed in the space in the battery pack 20 corresponding to the convex portion 21b is shown, but the present disclosure is not limited thereto. Other members other than the expansion valve 94 may be disposed in the above space, or no member may be disposed. In addition, the convex portion may be formed by fixing a predetermined member to the upper surface portion 21a.

[0081] In the above-described embodiment, an example in which the heat insulating member 28 surrounds the entire circumference of the convex portion 21b is shown, but the present disclosure is not limited thereto. The heat insulating member may not surround the entire circumference of the convex portion 21b. In Figure 8In the example shown, a hole portion 128a into which the convex portion 21b is inserted and a gap portion 128b are formed in the heat insulating member 128. The gap portion 128b is formed continuously with the hole portion 128a and extends outward in the circumferential direction from the hole portion 128a. By means of the gap portion 128b, a notch is formed in the heat insulating member 128. Further, as described above, a portion 21c corresponding to the shortest distance D1 (refer to Figure 7 ) is provided on the convex portion 21b. The shortest distance D2 (the shortest distance in the circumferential direction of the heat insulating member 128) between the portions of the heat insulating member 128 corresponding to the gap portion 128b is smaller than the minimum width W of the portion 21c. Further, the minimum width W means the minimum value of the width in the circumferential direction of the convex portion 21b (heat insulating member 128). Thereby, it is possible to suppress the case where the heat insulating member 128 detaches from the vehicle (battery pack) due to the convex portion 21b passing through the gap portion 128b. Further, the heat insulating member 128 is an example of the "mounting member" of the present disclosure.

[0082] The embodiments disclosed herein should be considered illustrative in all respects and not restrictive. The scope of the present disclosure is shown by the claims and is intended to include meanings equivalent to the claims and all modifications within the scope.

Claims

1. A vehicle, characterized in that: have: a vehicle body, the vehicle body comprising an underbody; and a battery pack, the battery pack being mounted on the vehicle body below the bottom of the vehicle body, The battery pack comprises: an upper surface portion, the upper surface portion being disposed opposite to the bottom portion of the vehicle body; and a mounting member mounted on the upper surface portion, The upper surface portion is provided with a convex portion protruding toward the bottom side of the vehicle body, The mounting member is provided with a hole into which the protrusion is inserted. The shortest distance between the protrusion and the bottom portion of the vehicle body is smaller than a minimum value of a thickness of the mounting member.

2. The vehicle according to claim 1, characterized in that The vehicle also has: Engine; and an exhaust pipe for exhausting gas exhausted from the engine, The exhaust pipe is arranged below the bottom of the vehicle body. The mounting member is a thermal insulator.

3. The vehicle according to claim 2, characterized in that The mounting member is disposed forward of a center of the battery pack in a front-rear direction of the vehicle body.

4. The vehicle according to any one of claims 1 to 3, characterized in that: The protrusion is separated from the vehicle body bottom.

5. A battery pack installed in a vehicle, characterized in that: The battery pack has: Battery modules; a housing portion that houses the battery module and includes an upper surface portion; and a mounting member mounted on the upper surface portion, The upper surface portion is provided so as to face the bottom of the vehicle body when the housing portion is mounted on the vehicle. The upper surface portion is provided with a convex portion that protrudes toward the bottom of the vehicle body when the receiving portion is mounted on the vehicle. The mounting member is provided with a hole into which the protrusion is inserted. When the receiving portion is mounted on the vehicle, the shortest distance between the protrusion and the vehicle body bottom is smaller than a minimum value of a thickness of the mounting member.

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