Battery case for motor vehicle and method for manufacturing same

Abstract

A battery case (100) for a motor vehicle is provided with: an upper cover (120) which is a tray-shaped press-molded article functioning as a cover, has a housing section (121) for housing a battery (10), and has an upper surface extending section (123) provided on the upper surface (122) of the housing section (121), the upper surface extending section (123) extending in the vehicle width direction from the left end to the right end and extending upward; a lower cover (150) that closes the upper cover (120) from below and houses the battery (10); and an upper surface outer lateral reinforcement (110) disposed on the upper cover (120) and extending in the vehicle width direction from the left end to the right end of the housing portion (121).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a motor vehicle battery case and a manufacturing method thereof. BACKGROUND

[0002] In a motor vehicle equipped with a large-capacity battery such as an electric motor vehicle, the battery is stored in a battery case and disposed on the lower side of the vehicle cabin. In such a motor vehicle battery case, high sealing performance against water intrusion from the road surface and high battery protection performance at the time of a motor vehicle collision are required.

[0003] In Patent Documents 1 to 3, a motor vehicle battery case is disclosed, which stores a battery in a tray-shaped case and achieves the securing of high sealing performance, and achieves the securing of high battery protection performance by the shape of the tray, a reinforcing member.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT DOCUMENTS

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-41783

[0007] Patent Document 2: Japanese Patent Application Publication No. 2021-64448

[0008] Patent Document 3: Japanese Patent Application Publication No. 2020-111101 SUMMARY

[0009] PROBLEMS TO BE SOLVED BY THE INVENTION

[0010] In the motor vehicle battery cases of Patent Documents 1 to 3, the battery is stored in a tray-shaped case and closed from above by a substantially flat upper cover. That is, the cover functions as a simple lid and does not greatly contribute to battery protection performance.

[0011] The present disclosure aims to achieve high battery protection performance by the upper cover in a motor vehicle battery case and a manufacturing method thereof.

[0012] MEANS FOR SOLVING THE PROBLEMS

[0013] The first aspect of the present disclosure provides a motor vehicle battery case including: an upper cover that is a tray-shaped press-formed product functioning as a lid, has a storage portion that stores a battery, and has an upper surface protrusion portion that protrudes upward from the left end to the right end in the vehicle width direction and extends in the vehicle width direction; a lower cover that stores the battery by closing the upper cover from below; and an upper surface outer lateral reinforcing member that is disposed above the upper cover and extends in the vehicle width direction from the left end to the right end of the storage portion.

[0014] According to this structure, it is possible to provide a load transmission path in the vehicle width direction using the upper surface extension portion, and it is possible to ensure high battery protection performance against an impact in the vehicle width direction with a simple configuration. Specifically, by providing the upper surface extension portion, it is possible to improve the load resistance compared to a simple flat plate, and it is possible to transmit a larger load. In addition, since the upper cover, which is a press-formed product formed by press-forming one metal plate, does not have a joint such as a seam, it is possible to prevent the intrusion of water from the outside, and it is possible to ensure high sealing performance.

[0015] The upper cover and the upper surface outer lateral reinforcement can also be joined to each other.

[0016] According to this structure, since the lower cover and the upper surface outer lateral reinforcement can integrally withstand a load, it is possible to ensure further high battery protection performance against an impact in the vehicle width direction.

[0017] At least one of the upper cover and the upper surface outer lateral reinforcement can also constitute a floor of a passenger compartment floor surface.

[0018] According to this structure, it is not necessary to provide the floor as a separate body, it is possible to reduce the number of components, and it is possible to reduce the weight.

[0019] The motor vehicle battery case can further have an upper surface inner lateral reinforcement that extends in the vehicle width direction along the upper surface extension portion from the left end to the right end of the accommodation portion, and is disposed in the upper cover in a manner that is at least partially accommodated in the upper surface extension portion.

[0020] According to this structure, since it is also possible to withstand a load using the upper surface inner lateral reinforcement, it is possible to ensure further high battery protection performance against an impact in the vehicle width direction.

[0021] The material of the upper cover can also be a steel material having a tensile strength of 590 MPa or more.

[0022] According to this structure, it is possible to ensure further high battery protection performance using the upper cover composed of a high-strength steel material.

[0023] It can also be that only the central portion of the upper cover in the vehicle front-rear direction has a tailor-welded blank structure.

[0024] According to these structures, it is possible to increase the strength of the central portion of the upper cover in the vehicle front-rear direction compared to other portions. For example, by using a tailor-welded blank structure, for this central portion, it is possible to use a high-strength material, or to make the thickness thicker. This central portion is a portion to which a high load is applied when the motor vehicle is side-impacted, and high load resistance is required. Therefore, it is effective to increase the strength of this central portion.

[0025] The battery can also be configured to be suspended from the upper cover and to be suspended from the battery support.

[0026] According to this structure, even if a load is applied to the lower cover, the load is not directly transmitted from the lower cover to the battery, and thus further high battery protection performance can be ensured.

[0027] The motor vehicle battery case can further include a lower surface longitudinal reinforcement member disposed below the lower cover and extending in the vehicle front-rear direction and engaged with the lower cover.

[0028] According to this structure, since the lower cover and the lower surface longitudinal reinforcement member can integrally receive a load, high battery protection performance with respect to an impact in the vehicle front-rear direction can be ensured.

[0029] The second aspect of the present disclosure provides a manufacturing method of a motor vehicle battery case, including the process of preparing: an upper cover that is a tray-shaped press-formed product functioning as a lid, has a housing portion that houses the battery, and has an upper surface protrusion portion that protrudes upward from the left end to the right end in the vehicle width direction and extends in the vehicle width direction; a lower cover that houses the battery by closing the upper cover from below; an upper surface outer lateral reinforcement member disposed above the upper cover in a manner of extending in the vehicle width direction from the left end to the right end of the housing portion; a battery support that receives the battery disposed above the lower cover; and a lower side sill that extends in the vehicle front-rear direction outside the upper cover in the vehicle width direction, mounts an upper portion of the battery to a base material, places the battery mounted to the base material on the battery support, and fastens and links the lower cover and the lower side sill from below, and fastens and links the base material, the upper cover, and the upper surface outer lateral reinforcement member, thereby configuring the battery to be suspended from the upper cover and to be suspended from the battery support.

[0030] According to this manufacturing method, high battery protection performance can be ensured by the upper cover as described above. In addition, even if a load is applied to the lower cover, the load is not directly transmitted from the lower cover to the battery, and thus further high battery protection performance can be ensured as described above.

[0031] Effects of Invention

[0032] According to the present disclosure, in a motor vehicle battery case and a method of installing the same, high battery protection performance can be ensured by the upper cover. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a side view of a motor vehicle.

[0034] Figure 2 is a perspective view of a motor vehicle battery case according to a first embodiment of the present application.

[0035] Figure 3 is Figure 2 is an exploded perspective view of the motor vehicle battery case.

[0036] Figure 4 is a perspective view showing the upper cover, the upper surface outer lateral reinforcement, and the upper surface inner lateral reinforcement.

[0037] Figure 5 is a cross-sectional view of the motor vehicle battery case taken along line V-V of Figure 2

[0038] Figure 6 is a perspective view of a vehicle body lower structure of the motor vehicle battery case. Figure 2

[0039] Figure 7 is a perspective view of an upper cover of a motor vehicle battery case according to a second embodiment of the present application. DETAILED DESCRIPTION

[0040] Embodiments of the present application will be described below with reference to the drawings.

[0041] (First Embodiment)

[0042] Referring to Figure 1 , the motor vehicle 1 travels by driving a motor with electric power supplied from a battery 10. The motor vehicle 1 can be, for example, an electric vehicle such as an electric power motor vehicle or a plug-in hybrid vehicle. The kind of the motor vehicle 1 is not particularly limited, and can be a passenger car, a truck, a work vehicle, or another mobile body. Hereinafter, a case where a general passenger car type electric power motor vehicle is taken as an example as the motor vehicle 1 will be described.

[0043] The motor vehicle 1 mounts a motor and a high voltage device or the like at a vehicle body front portion 20. In addition, the motor vehicle 1 mounts a motor vehicle battery case 100 (hereinafter, also simply referred to as the battery case 100) in which the battery 10 as a driving electric power source is stored, on substantially the entire surface under a passenger compartment R of a vehicle body central portion 30. In Figure 1 , the vehicle front-rear direction of the motor vehicle 1 is indicated as an X direction (arrow indicates forward), and the vehicle up-down direction is indicated as a Z direction (arrow indicates upward). The same indication is made in the following drawings, Figure 2 the vehicle width direction of the motor vehicle 1 is indicated as a Y direction (arrow indicates rightward).

[0044] Referring to Figures 2-5 ​​The battery housing 100 of the present embodiment has an upper surface outer lateral reinforcement 110, an upper cover 120, an upper surface inner lateral reinforcement 130, a base material 140, a lower cover 150, a battery support 160, a frame 170, a lower surface longitudinal reinforcement 180, and a bottom plate 190. In Figure 3 the illustration of the battery 10 is omitted, and in Figure 5 the battery 10 is shown. The battery 10 has a cylindrical shape that is long in the vehicle up-down direction, and is arranged and closely disposed in the vehicle front-rear direction and the vehicle width direction. In Figure 5 the present embodiment, the portion enclosed by the dotted circle is shown enlarged.

[0045] The upper cover 120 is a tray-shaped member that functions as a lid, and is formed by press-forming one sheet of metal. That is, the upper cover 120 is a press-formed product of a single piece that does not have a joint-like seam. The upper cover 120 has a housing portion 121 that houses the battery 10, and an upper surface protruding portion 123 that extends in the vehicle width direction from the left end to the right end and protrudes upward is provided on the upper surface 122 of the housing portion 121. The number of the upper surface protruding portion 123 can be one or a plurality. A flange portion 124 extends outward in the horizontal direction from the lower end of the housing portion 121.

[0046] The upper cover 120 is composed of, for example, a steel material. Specifically, the material of the upper cover 120 can also be a steel material having a tensile strength of 590 MPa or more. High battery protection performance can be ensured by the upper cover 120 composed of a high-strength steel material. In addition, the material of the upper cover 120 can also be another metal material such as an aluminum alloy.

[0047] The upper surface outer lateral reinforcement 110 is a member that reinforces the upper cover 120. In the present embodiment, the upper surface outer lateral reinforcement 110 becomes a corrugated plate having a continuous top-hat shape in a cross section perpendicular to the vehicle width direction. The upper surface outer lateral reinforcement 110 is disposed above (on the outer side of) the upper cover 120, extending in the vehicle width direction from the left end to the right end of the housing portion 121 of the upper cover 120. The upper surface outer lateral reinforcement 110 becomes a rectangular shape approximately the same size as the housing portion 121 of the upper cover 120 when viewed from the vehicle up-down direction. However, the shape, size, or number of the upper surface outer lateral reinforcement 110 can be arbitrary.

[0048] The upper surface outer lateral reinforcement 110 is joined to the upper cover 120, and a plurality of outer side reinforcement spaces So (refer to Figure 5 ) are formed between the upper surface outer lateral reinforcement 110 and the upper cover 120. That is, the upper surface outer lateral reinforcement 110 and the upper cover 120 combine to form a plurality of closed cross-sectional shapes that define a plurality of outer side reinforcement spaces So when viewed in the vehicle width direction. Thereby, the load resistance in the vehicle width direction is improved.

[0049] The upper surface outer lateral reinforcement 110 is composed of, for example, a steel material. Specifically, the material of the upper surface outer lateral reinforcement 110 can also be a steel material having a tensile strength of 980 to 1470 MPa or more. In addition, the material of the upper surface outer lateral reinforcement 110 can also be another metal material such as an aluminum alloy.

[0050] The upper surface inner lateral reinforcement 130 is a member that reinforces the upper cover 120. In the present embodiment, the upper surface inner lateral reinforcement 130 becomes a corrugated plate having a continuous top hat shape in a cross section perpendicular to the vehicle width direction. The upper surface inner lateral reinforcement 130 is disposed below (on the inner side of) the upper cover 120 in such a manner as to be at least partially housed in the upper surface protruding portion 123, and extends along the vehicle width direction from the left end to the right end of the housing portion 121 along the upper surface protruding portion 123 of the upper cover 120. In addition, the upper surface inner lateral reinforcement 130 becomes a rectangular shape approximately the same size as the housing portion 121 of the upper cover 120 when viewed from the vehicle up-down direction. However, the shape, size, or number of the upper surface outer lateral reinforcement 110 can be arbitrary.

[0051] The upper surface inner lateral reinforcement 130 is joined to the upper cover 120, and forms a plurality of inner side reinforcement spaces Si (refer to FIG. 2) between the upper cover 120. Figure 5 That is, the upper surface inner lateral reinforcement 130 and the upper cover 120 combine to form a plurality of closed cross-sectional shapes that define a plurality of inner side reinforcement spaces Si when viewed from the vehicle width direction. Thereby, the load resistance in the vehicle width direction is improved.

[0052] The upper surface inner lateral reinforcement 130 is composed of, for example, a steel material. Specifically, the material of the upper surface inner lateral reinforcement 130 can also be a steel material having a tensile strength of 980 to 1470 MPa or more. In addition, the material of the upper surface inner lateral reinforcement 130 can also be another metal material such as an aluminum alloy. Note that the upper surface inner lateral reinforcement 130 can also be omitted as necessary.

[0053] The base material 140 is a member that holds the storage battery 10 in a suspended manner. In the example of FIG. 1, a plurality of cylindrical storage batteries 10 are disposed suspended from the base material 140. The base material 140 is approximately rectangular when viewed from the vehicle up-down direction, and has a shape complementary to the upper surface inner lateral reinforcement 130 when viewed from the vehicle width direction. The base material 140 is joined to the lower surface of the upper surface inner lateral reinforcement 130, and is positioned in the upper portion in the housing portion 121 (refer to FIG. 2). Figure 5 Figure 4

[0054] ​​The lower cover 150 houses the storage battery 10 by (at least partially) enclosing the upper cover 120 from below. In the present embodiment, the lower cover 150 is a substantially flat plate having a shape in which portions of the lower cover 150 on both sides in the vehicle width direction of the housing portion 121 are lowered by one step.

[0055] The lower cover 150 is composed of, for example, a steel material. Specifically, the material of the lower cover 150 can also be a steel material having a tensile strength of 590 MPa or more. Thereby, a high storage battery protection performance can be ensured by the lower cover 150 composed of a steel material having high strength. In addition, the material of the lower cover 150 can also be another metal material such as an aluminum alloy.

[0056] The storage battery support 160 is provided on (the upper surface of) the lower cover 150 and is a member that temporarily receives the storage battery 10 during the manufacturing process of the storage battery housing 100. The storage battery support 160 has a plurality of bottomed cylindrical shapes complementary to the plurality of storage batteries 10, and places and fixes the positions of the plurality of storage batteries 10 in the horizontal direction. Note that, in the state of the finished product of the storage battery housing 100, as described above, the plurality of storage batteries 10 are configured to be suspended from the base material 140, and thus are not placed on the storage battery support 160. Note that, the storage battery support 160 can also be omitted as necessary.

[0057] The frame 170 is disposed on the vehicle width direction outer side of the upper cover 120. In the present embodiment, the frame 170 includes side frames 171, 172 that extend in the full length of the upper cover 120 in the vehicle front-rear direction. However, the frame 170 is not limited to this configuration, and can also be disposed on the entire outer side of the upper cover 120 as viewed in the vehicle up-down direction, for example.

[0058] The side frames 171, 172 are formed by, for example, bending a steel sheet. Specifically, the material of the side frames 171, 172 can also be a steel material having a tensile strength of 980 to 1470 MPa or more. In addition, the material thereof can also be another metal material such as an aluminum alloy. Note that, the frame 170 can also be omitted as necessary.

[0059] The lower surface longitudinal reinforcement 180 is a member that reinforces the lower cover 150. The lower surface longitudinal reinforcement 180 is disposed below the lower cover 150, extends in the vehicle front-rear direction from the front end to the rear end of the housing portion 121, and is joined to the lower cover 150. In the illustrated example, three lower surface longitudinal reinforcements 180 having a hat-shaped cross section are provided.

[0060] The lower surface longitudinal reinforcement 180 is composed of, for example, a steel material. Specifically, the material of the lower surface longitudinal reinforcement 180 can also be a steel material having a tensile strength of 980 to 1470 MPa or more. In addition, the material of the lower surface longitudinal reinforcement 180 can also be another metal material such as an aluminum alloy. Note that the lower surface longitudinal reinforcement 180 can also be omitted as necessary.

[0061] The floor panel 190 is a metal panel disposed below the lower cover 150 and the lower surface longitudinal reinforcement 180. The floor panel 190 is a rectangle having substantially the same size as the upper cover 120 when viewed in the vehicle up-down direction. The floor panel 190 is joined to the flange portion 124 of the upper cover 120. In the present embodiment, the floor panel 190 is a flat steel panel. For example, the floor panel 190 is a 1.4 mm steel panel. However, the thickness and material of the floor panel 190 are not particularly limited and can be arbitrary. Note that the floor panel 190 can also be omitted as necessary.

[0062] Referring to Figure 6 , the battery case 100 having the above structure constitutes a part of the underbody structure of the automobile 1 as described below.

[0063] A lower side sill 200 is disposed on both outer sides in the vehicle width direction of the battery case 100. The lower side sill 200 is a member extending in the vehicle front-rear direction and constituting the outer surface in the vehicle width direction of the automobile 1. The lower side sill 200 is configured such that an inner panel 210, which is a metal panel, is joined to an outer panel 220, and a cushion member 230 is disposed in a space between the inner panel 210 and the outer panel 220. The cushion member 230 has a plurality of chambers r1 arranged in the vehicle width direction and has a function of cushioning an impact from the side surface of the automobile 1.

[0064] In the present embodiment, the upper surface outer lateral reinforcement 110 constitutes a floor panel that becomes a floor surface of the passenger compartment R. That is, the upper surface outer lateral reinforcement 110 has a function of reinforcing the upper cover 120 and a function as a floor panel. Note that in a case where the upper surface outer lateral reinforcement 110 is not disposed so as to cover the entire upper surface 122 of the upper cover 120, at least one of the upper surface outer lateral reinforcement 110 and the upper cover 120 constitutes a floor panel.

[0065] Next, a manufacturing method of the battery case 100 of the present embodiment will be described.

[0066] First, the aforementioned components are prepared (refer to Figure 3 , 6). Next, the upper portion of the battery 10 is mounted to the base material 140. Thereafter, the battery 10 mounted to the base material 140 is placed on the battery support 160. Then, the lower cover 150, the frame 170, and the lower side beam 200 on which the battery 10 is placed by the battery support 160 are fastened and joined from below (for example, bolt-nut fastening and joining). Thereafter, the base material 140, the upper cover 120, the upper surface outer lateral reinforcement 110, and the upper surface inner lateral reinforcement 130 are fastened and joined (for example, common fastening based on bolt-nut fastening and joining), so that the battery 10 is arranged to be suspended from the upper cover 120 and to be suspended from the battery support 160 (refer to Figure 5 Note that the frame 170 and the upper surface inner lateral reinforcement 130 can be omitted as necessary as described above.

[0067] The motor vehicle battery case 100 according to the present embodiment has the following functional effects.

[0068] The load transmission path can be provided in the vehicle width direction by the upper surface extension portion 123 of the upper cover 120, and high battery protection performance against impact in the vehicle width direction can be ensured with a simple configuration. Specifically, by providing the upper surface extension portion 123, the load resistance can be improved compared to a simple flat plate, and a larger load can be transmitted. In addition, the upper cover 120, which is a press-formed product formed by press-forming one metal plate, does not have a joint such as a seam, so it is possible to prevent the intrusion of water from the outside and to ensure high sealing performance.

[0069] In addition, the upper cover 120 and the upper surface outer lateral reinforcement 110 are joined to each other, so the upper cover 120 and the upper surface outer lateral reinforcement 110 can integrally withstand the load. Therefore, further high battery protection performance against impact in the vehicle width direction can be ensured.

[0070] In addition, at least one of the upper cover 120 and the upper surface outer lateral reinforcement 110 functions as a floor, so it is not necessary to provide a floor as a separate body, the number of components can be reduced, and weight reduction can be achieved.

[0071] In addition, the load can also be received by the upper surface inner lateral reinforcement 130, so further high battery protection performance against impact in the vehicle width direction can be ensured.

[0072] In addition, the battery 10 is arranged to be suspended from the lower cover 150, so even if a load is applied to the lower cover 150, the load is not directly transmitted from the lower cover 150 to the battery 10, and therefore further high battery protection performance can be ensured.

[0073] Further, the lower cover 150 and the lower surface longitudinal reinforcement 180 are engaged with each other, and thus the lower cover 150 and the lower surface longitudinal reinforcement 180 can integrally bear a load. Therefore, high battery protection performance with respect to an impact in the vehicle front-rear direction can be ensured.

[0074] (Second Embodiment)

[0075] Figure 7 The shape of the upper cover 120 of the motor vehicle battery case of the second embodiment shown is different from that of the first embodiment. The second embodiment is basically the same as the first embodiment except for the parts associated therewith. Therefore, the explanation is sometimes omitted with respect to the parts shown in the first embodiment. In the following explanation, the parts associated with the first embodiment are not explained. Figure 7 In the figure, only the upper cover 120 is shown, and the part surrounded by the dotted circle is shown in an enlarged manner.

[0076] In the present embodiment, only the central portion 125 of the upper cover 120 in the vehicle front-rear direction has a tailor-welded blank structure. The tailor-welded blank structure is a structure in which a sheet metal is overlapped at a specific portion by press working. In the example shown in the figure, the tailor-welded blank structure is provided in the region from the center in the vehicle front-rear direction to one fourth of the whole, as the central portion 125. The central portion 125 in the vehicle front-rear direction may, for example, be set to the region from the center in the vehicle front-rear direction to one half of the whole. Here, the region on the front or rear side of the central portion 125 in the vehicle front-rear direction is referred to as the outer side portion 126.

[0077] In the tailor-welded blank structure of the example shown, the central portion 125 is overlapped with another sheet metal 127, and the thickness of the central portion 125 is made larger than the thickness of the outer side portion 126. That is, only the central portion 125 is composed of two sheet metals. For example, in the case where the upper cover 120 is composed of a steel material, a steel sheet having a higher tensile strength can be overlapped and arranged in the central portion 125.

[0078] According to the present embodiment, the strength of the central portion 125 of the upper cover 120 in the vehicle front-rear direction can be made higher than that of the other portions. The central portion 125 is a portion to which a high load is applied in a side collision of a motor vehicle, and a high load resistance is required. Therefore, it is effective to increase the strength of this central portion 125.

[0079] According to the above, the specific embodiments of the present application and modifications thereof have been explained, the present application is not limited to the above-described modes, and various modifications can be made within the scope of the present application and implemented. For example, an embodiment obtained by appropriately combining the contents of the respective embodiments can be employed as one embodiment of the present application.

[0080] The present disclosure can include the following aspects.

[0081] (Aspect 1)

[0082] A battery case for a motor vehicle, comprising:

[0083] an upper cover which is a tray-shaped press-formed product functioning as a lid, which has a housing portion that houses a battery, and which has an upper surface protruding portion provided on an upper surface of the housing portion and extending in a vehicle width direction from a left end to a right end and protruding upward;

[0084] a lower cover which houses the battery by enclosing the upper cover from below; and

[0085] an upper surface outer lateral reinforcement which is disposed on the upper cover and extends in the vehicle width direction from the left end to the right end of the housing portion.

[0086] (Scheme 2)

[0087] The battery case for a motor vehicle according to Scheme 1, wherein

[0088] the upper cover and the upper surface outer lateral reinforcement are joined to each other.

[0089] (Scheme 3)

[0090] The battery case for a motor vehicle according to Scheme 1 or 2, wherein

[0091] at least one of the upper cover and the upper surface outer lateral reinforcement constitutes a floor surface of a passenger compartment floor.

[0092] (Scheme 4)

[0093] The battery case for a motor vehicle according to any one of Schemes 1 to 3, wherein

[0094] the battery case for a motor vehicle further comprises an upper surface inner lateral reinforcement which is disposed in the upper cover in a manner that extends in the vehicle width direction from the left end to the right end of the housing portion along the upper surface protruding portion and is at least partially housed in the upper surface protruding portion.

[0095] (Scheme 5)

[0096] The battery case for a motor vehicle according to any one of Schemes 1 to 4, wherein

[0097] the material of the upper cover is a steel material having a tensile strength of 590 MPa or more.

[0098] (Scheme 6)

[0099] The battery case for a motor vehicle according to any one of Schemes 1 to 5, wherein

[0100] only a central portion of the upper cover in a vehicle front-rear direction has a tailor-welded blank configuration.

[0101] (Scheme 7)

[0102] The battery housing for a motor vehicle according to any one of the schemes 1 to 6, wherein

[0103] The battery is configured to be suspended from the upper cover and to be suspended from the lower cover.

[0104] (Scheme 8)

[0105] The battery housing for a motor vehicle according to any one of the schemes 1 to 7, wherein

[0106] The battery housing for a motor vehicle is further provided with a lower surface longitudinal reinforcement configured below the lower cover and extending in the vehicle front-rear direction and engaged with the lower cover.

[0107] (Scheme 9)

[0108] A method of manufacturing a battery housing for a motor vehicle includes the following processes:

[0109] Preparation: an upper cover which is a tray-shaped press-formed product functioning as a lid, and has a housing portion that houses a battery, and an upper surface protruding portion that protrudes upward from the left end to the right end in the vehicle width direction and is provided on the upper surface of the housing portion; a lower cover that houses the battery by closing the upper cover from below; an upper surface outer lateral reinforcement that is configured above the upper cover in a manner extending in the vehicle width direction from the left end to the right end of the housing portion; a battery support that is provided above the lower cover and receives the battery; and a lower side sill that extends in the vehicle front-rear direction on the vehicle width direction outer side of the upper cover,

[0110] mounting an upper portion of the battery to a base material,

[0111] placing the battery mounted to the base material on the battery support,

[0112] fastening and joining the lower cover and the lower side sill from below,

[0113] fastening and joining the base material, the upper cover, and the upper surface outer lateral reinforcement, thereby configuring the battery to be suspended from the upper cover and to be suspended from the battery support.

[0114] This application claims priority based on Japanese Patent Application, No. 2023-052043, with the filing date of March 28, 2023, as a base application. Japanese Patent Application, No. 2023-052043 is incorporated by reference in the present specification.

[0115] Explanation of Reference Signs:

[0116] 1 motor vehicle

[0117] 10 storage battery

[0118] 20 front portion of vehicle body

[0119] 30 central portion of vehicle body

[0120] 100 storage battery case (storage battery case for motor vehicle)

[0121] 110 upper surface outer side transverse reinforcement

[0122] 120 upper cover

[0123] 121 housing portion

[0124] 122 upper surface

[0125] 123 upper surface protruding portion

[0126] 124 flange portion

[0127] 125 central portion

[0128] 126 outer side portion

[0129] 127 metal plate

[0130] 130 upper surface inner side transverse reinforcement

[0131] 140 base material

[0132] 150 lower cover

[0133] 160 storage battery support

[0134] 170 frame

[0135] 171, 172 side frame

[0136] 180 lower surface longitudinal reinforcement

[0137] 190 floor panel

[0138] 200 lower side sill

[0139] 210 inner panel

[0140] 220 outer panel

[0141] 230 cushioning member

Claims

1. A motor vehicle battery case, wherein the motor vehicle battery case is provided with: an upper cover which is a tray-shaped press-formed product functioning as a lid, has a housing portion housing a battery, and is provided with an upper surface protruding portion protruding upward from the left end to the right end in the vehicle width direction and extending in the vehicle width direction on the upper surface of the housing portion; a lower cover which houses the battery by closing the upper cover from below; and an upper surface outer side transverse reinforcement which is disposed on the upper cover and extends in the vehicle width direction from the left end to the right end of the housing portion.

2. The motor vehicle battery case according to claim 1, wherein the upper cover and the upper surface outer side transverse reinforcement are engaged with each other.

3. The motor vehicle battery case according to claim 1 or 2, wherein at least one of the upper cover and the upper surface outer side transverse reinforcement constitutes a floor surface of a passenger compartment floor.

4. The motor vehicle battery case according to claim 1 or 2, wherein the motor vehicle battery case is further provided with an upper surface inner side transverse reinforcement which extends in the vehicle width direction from the left end to the right end of the housing portion along the upper surface protruding portion and is disposed in the upper cover in a manner such that it is housed at least partially in the upper surface protruding portion.

5. The motor vehicle battery case according to claim 1 or 2, wherein the material of the upper cover is a steel material having a tensile strength of 590 MPa or more.

6. The motor vehicle battery case according to claim 1 or 2, wherein only the central portion of the upper cover in the vehicle front-rear direction has a tailor-welded blank structure.

7. The motor vehicle battery case according to claim 1 or 2, wherein the battery is disposed so as to be suspended from the upper cover and to be floating from the lower cover.

8. The motor vehicle battery case according to claim 1 or 2, wherein the motor vehicle battery case is further provided with a lower surface longitudinal reinforcement which is disposed below the lower cover and extends in the vehicle front-rear direction and is engaged with the lower cover.

9. A method of manufacturing a motor vehicle battery case, wherein the method of manufacturing the motor vehicle battery case includes the following processes: preparation: an upper cover which is a tray-shaped press-formed product functioning as a lid, has a housing portion housing a battery, and is provided with an upper surface protruding portion protruding upward from the left end to the right end in the vehicle width direction and extending in the vehicle width direction on the upper surface of the housing portion; a lower cover which houses the battery by closing the upper cover from below; an upper surface outer side transverse reinforcement which is disposed on the upper cover in a manner such that it extends in the vehicle width direction from the left end to the right end of the housing portion; a battery support which is disposed on the lower cover and receives the battery; and a lower rocker which extends in the vehicle front-rear direction on the vehicle width direction outer side of the upper cover, mounting an upper portion of the battery to a base material, placing the battery mounted to the base material on the battery support, fastening and joining the lower cover and the lower rocker from below, The substrate, the upper cover, and the upper surface outer lateral stiffeners are fastened together to configure the battery to be suspended from the upper cover and to be levitated from the battery support.

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