Vehicle battery case

Abstract

To provide a vehicle battery case which enables improvement of efficiency of temperature control of a battery by a temperature control fluid.SOLUTION: A vehicle battery case 10a includes: a plate-like lower panel 11 configured so that a battery may be placed on an upper surface 111; and a first heat insulation member 12 disposed on the lower surface side of the lower panel 11. A cavity-shaped temperature control path 20, in which a temperature control fluid for controlling a temperature of a battery module 90 plated on the upper surface 111 of the lower panel 11 may circulate, is provided between the lower panel 11 and the first heat insulation member 12.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a battery case for a vehicle. [Background technology]

[0002] Some vehicle battery cases are configured to be able to adjust the temperature of the battery so that the battery housed therein can be maintained at an appropriate temperature. For example, a vehicle battery case disclosed in Patent Document 1 includes a bottom plate on which the battery is placed and a cooling body provided below the bottom plate. The cooling body is configured to allow a temperature-regulating fluid (refrigerant) to flow, and the battery placed on the bottom plate can be cooled by flowing the temperature-regulating fluid through the cooling body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-68522 Summary of the Invention

[0004] (Problem to be solved by the invention) In order to increase the temperature regulation (cooling and heating) ability of the battery by the temperature control fluid or to suppress a decrease in the temperature regulation ability, it is preferable to increase the amount of heat exchange between the temperature control fluid and the battery. However, in the configuration disclosed in Patent Document 1, a space is formed below the bottom plate, and the cooling body is arranged in that space, so heat is also exchanged between the temperature control fluid flowing through the cooling body and the air in the space below the bottom plate (i.e., heat is exchanged between the outside of the battery case via the air in the space below the bottom plate). For this reason, when the amount of heat exchanged between the temperature control fluid flowing through the cooling body and the air in the space below the bottom plate increases, the amount of heat exchange between the temperature control fluid flowing through the cooling body and the battery decreases. In other words, the efficiency of temperature regulation decreases.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a battery case for a vehicle that can improve the efficiency of regulating the temperature of the battery by a temperature regulating fluid.

[0006] (Means for solving the problem) In order to achieve the above object, the present invention provides a battery case for a vehicle, comprising: A plate-shaped first plate member configured so that a battery can be placed on an upper surface thereof; A heat insulating member disposed below the first plate member; Equipped with Between the first plate member and the heat insulating member, a hollow passage is provided through which a temperature control fluid for regulating the temperature of the battery placed on the upper surface of the first plate member can flow.

[0007] According to the battery case for a vehicle of the present invention, since a heat insulating member is present on the lower side of the temperature control path (the side opposite to the side where the first plate member on which the battery is placed is disposed as viewed from the temperature control path), it is possible to reduce the amount of heat transferred from the temperature control fluid flowing through the temperature control path to the lower side of the battery case and the amount of heat transferred from the lower side of the battery case to the temperature control fluid. Therefore, it is possible to increase the efficiency of temperature regulation of the battery by the temperature control fluid. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing the configuration of a battery case for a vehicle according to the first embodiment. [Diagram 2] FIG. 2 is an exploded perspective view showing the configuration of a battery case for a vehicle according to the first embodiment. [Diagram 3] FIG. 3 is a cross-sectional view showing the configuration of a battery case for a vehicle according to the first embodiment. [Figure 4] FIG. 4 is an exploded perspective view showing the configuration of a battery case for a vehicle according to the second embodiment. [Diagram 5] FIG. 5 is an exploded perspective view showing the configuration of a battery case for a vehicle according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In the following description, each direction of the vehicle battery case is based on the direction when the battery case is mounted on the vehicle (i.e., the direction of the vehicle). In each drawing, the front side of the vehicle battery case is indicated by an arrow Fr, the rear side is indicated by an arrow Rr, the upper side is indicated by an arrow Up, the lower side is indicated by an arrow Dw, the right side is indicated by an arrow R, and the left side is indicated by an arrow L. In the following description, the vehicle battery case may be abbreviated to "case".

[0010] The cases 10a, 10b according to each embodiment are used to house a plurality of battery modules 90 mounted on an electric vehicle (such as an EV, a PHV (plug-in hybrid vehicle), or a HV (hybrid vehicle)). The battery module 90 includes a plurality of battery cells connected to each other. In this embodiment, the battery module 90 includes a plurality of battery cells joined so as to be aligned in series in a predetermined direction, and has an elongated shape that is long in the arrangement direction of the battery cells.

[0011] The cases 10a and 10b are disposed, for example, on the floor of the vehicle (below the seat). The cases 10a and 10b have a path (hereinafter referred to as a "temperature control path") through which a fluid such as water (hereinafter referred to as a "temperature control fluid") for temperature control (cooling and heating) of the housed battery module 90 can flow. The cases 10a and 10b are configured to be able to control the temperature (cooling and heating) of the housed battery module 90 by flowing a temperature control fluid supplied from the outside through the temperature control path 20.

[0012] First Embodiment Fig. 1 is a perspective view showing the configuration of a case 10a according to a first embodiment. Fig. 2 is an exploded perspective view showing the configuration of the case 10a, as viewed obliquely from above. Fig. 3 is a cross-sectional view showing the configuration of the case 10a.

[0013] As shown in FIG. 1 to FIG. 3, the case 10a includes a lower panel 11, a first heat insulating member 12, a front frame 13, a rear frame 14, left and right side frames 15, a share panel 16, a second heat insulating member 17, a third heat insulating member 18, and an upper cover 19. Of these members, the lower panel 11, the share panel 16, the front frame 13, the rear frame 14, the left and right side frames 15, and the upper cover 19 are formed of a material having high thermal conductivity. For example, these members are formed of a metal material such as an aluminum alloy, an iron-based metal, copper, or a copper alloy. The first heat insulating member 12, the second heat insulating member 17, and the third heat insulating member 18 are formed of a material having heat insulating properties (or are configured to include a material having heat insulating properties and have heat insulating properties). Specifically, they are formed of a material having a lower thermal conductivity than the lower panel 11, the share panel 16, the front frame 13, the rear frame 14, the left and right side frames 15, and the upper cover 19, and are preferably formed of a material having a lower thermal conductivity than air. For example, the first heat insulating member 12, the second heat insulating member 17, and the third heat insulating member 18 are preferably made of a material having a thermal conductivity of 0.040 (W / m K) or less. Examples of such materials include urethane foam and polystyrene foam.

[0014] The case 10a has a hollow box-like configuration in which the battery module 90 can be placed. In this embodiment, the case 10a has a substantially quadrilateral rectangular parallelepiped shape when viewed from the top and bottom. In this case, the lower panel 11, the first insulating member 12, and the share panel 16 form a portion corresponding to the "bottom of the box," the front frame 13, the rear frame 14, the two side frames 15, and the second insulating member 17 form a portion corresponding to the "side walls (peripheral walls) of the box," and the upper cover 19 and the third insulating member 18 form a portion corresponding to the "lid of the box."

[0015] The lower panel 11 is an example of a first plate member of the present invention. The lower panel 11 is a flat member having a substantially quadrilateral shape when viewed in the up-down direction. The upper surface 111 of the lower panel 11 is substantially flat and is configured so that a battery cell can be placed on the upper surface 111.

[0016] The first heat insulating member 12 is an example of a heat insulating member of the present invention. The first heat insulating member 12 is a flat plate-like member having a predetermined thickness (vertical dimension). In addition, in this embodiment, an example is shown in which the first heat insulating member 12 has approximately the same dimensions and approximately the same shape as the lower panel 11 when viewed in the vertical direction. A path groove portion 121 that forms the temperature control path 20 in a state where the first heat insulating member 12 is joined to the lower panel 11 is provided on the upper surface (the surface facing the lower panel 11). The path groove portion 121 has a groove-like configuration that opens on the upper side (the side facing the lower panel 11). The upper surface of the first heat insulating member 12 is approximately flat except for the path groove portion 121. In addition, the first heat insulating member 12 has water-proof properties so that the temperature control fluid does not penetrate.

[0017] Then, the first heat insulating member 12 is disposed under the lower panel 11, and the lower surface of the lower panel 11 and the upper surface of the first heat insulating member 12 are joined together, for example, by adhesive. As described above, the lower panel 11 and the first heat insulating member 12 have substantially the same outer dimensions and shapes in the vertical view, so that substantially the entire lower surface of the lower panel 11 is covered with the first heat insulating member 12 (in other words, the first heat insulating member is laminated over substantially the entire lower surface of the lower panel 11). Then, the opening of the path groove portion 121 provided on the upper surface of the first heat insulating member 12 is closed by the lower panel 11. As a result, a hollow temperature control path 20 through which the temperature control fluid can flow is formed between the lower panel 11 and the first heat insulating member 12. More specifically, a hollow temperature control path 20 is formed between the lower panel 11 and the first heat insulating member 12, surrounded by the inner circumferential surface of the path groove portion 121 of the first heat insulating member 12 and a portion of the lower surface of the lower panel 11 that overlaps the path groove portion 121 in the vertical view.

[0018] The first insulating member 12 may not be formed with the path groove portion 121. In this case, a groove-shaped portion may be provided on the surface of the lower panel 11 facing the first insulating member 12, and the temperature control path 20 may be formed by the groove-shaped portion and the surface of the first insulating member 12 facing the lower panel 11. A groove-shaped portion may be provided on the surface of the lower panel 11 facing the first insulating member 12, and the path groove portion 121 may be provided in the first insulating member 12. In this case, a groove-shaped portion and the path groove portion 121 may face each other to form the temperature control path 20. In this way, it is only necessary that the first insulating member 12 serves as a part of the temperature control path 20.

[0019] The number, position, shape, and dimensions of the temperature control paths 20 are not particularly limited. However, in order to increase the efficiency of temperature control of the battery module 90 (i.e., to increase the amount of heat exchanged between the temperature control fluid and the battery module 90), the temperature control paths 20 are provided so as to include a portion located inside the area where the battery module 90 is placed when viewed in the up-down direction.

[0020] The front frame 13, the rear frame 14, and the left and right side frames 15 are all hollow, long rod-like members. For example, extrusion materials are used for the front frame 13, the rear frame 14, and the left and right side frames 15. The longitudinal ends of the front frame 13 and the rear frame 14 and the longitudinal ends of the left and right side frames 15 are joined to each other to form a frame body that is approximately quadrilateral in the vertical view and has a hollow inner periphery. The left and right side frames 15 may function as vehicle rockers (sometimes called side rockers) when the case 10a is assembled to the vehicle.

[0021] The shear panel 16 is an example of a third plate member of the present invention. The shear panel 16 is a flat member that is substantially quadrilateral when viewed in the vertical direction. The shear panel 16 is disposed below the front frame 13, the rear frame 14, and the left and right side frames 15. The outer periphery of the upper surface of the shear panel 16 is joined to the respective lower surfaces of the front frame 13, the rear frame 14, and the left and right side frames 15 by, for example, screws.

[0022] The lower panel 11 and the first insulation member 12 are housed inside the frame formed by the front frame 13, the rear frame 14, and the left and right side frames 15, and above the share panel 16. In other words, the lower panel 11 and the first insulation member 12 are arranged so as to be surrounded by the frame formed by the front frame 13, the rear frame 14, and the left and right side frames 15. The lower surface of the first insulation member 12 is joined to the upper surface of the share panel 16.

[0023] The first heat insulating member 12 and the share panel 16 may be integrally molded (integrally molded members). For example, when the first heat insulating member 12 is molded by injection molding of a resin material, the first heat insulating member 12 and the share panel 16 may be integrally molded by insert molding. With this configuration, the first heat insulating member 12 and the share panel 16 can be assembled in one step in the manufacture of the case 10a, so that the number of steps required for manufacturing the case 10a can be reduced. Also, the lower panel 11, the first heat insulating member 12, and the share panel 16 may be integrally molded (integrally molded members). In this case, when the first heat insulating member 12 is molded by injection molding of a resin material, the lower panel 11, the first heat insulating member 12, and the share panel 16 may be integrally molded by insert molding. Even with this configuration, the number of steps required for manufacturing the case 10a can be reduced.

[0024] The second heat insulating member 17 has a frame-like configuration that is substantially quadrilateral when viewed in the vertical direction and has an opening that penetrates in the vertical direction. The second heat insulating member 17 is housed inside the frame body so that the portions corresponding to the sides of the quadrilateral are along the inner periphery sides of the front frame 13, the rear frame 14, and the left and right side frames 15. The area on the inner periphery side of the second heat insulating member 17 is an area that can house the battery module 90. Note that, in a state in which the second heat insulating member 17 is housed inside the frame body, the upper surface 111 of the lower panel 11 includes a portion that is exposed through the opening of the second heat insulating member 17. The battery module 90 can be placed so as to directly contact the exposed portion of the upper surface 111 of the lower panel 11.

[0025] The third heat insulating member 18 and the upper cover 19 are substantially quadrilateral flat plate-like members. The third heat insulating member 18 is disposed above the front frame 13, the rear frame 14, the left and right side frames 15, and the second heat insulating member 17, and the upper cover 19 is disposed above the second heat insulating member 17 so as to overlap the second heat insulating member 17. The second heat insulating member 17 and the upper cover 19 close the opening of the frame formed by the front frame 13, the rear frame 14, and the left and right side frames 15.

[0026] In this manner, a space surrounded by the lower panel 11, the second insulating member 17, and the third insulating member 18 is formed inside the case 10a. A battery module 90 can be housed in this space. In this case, the battery module 90 is surrounded on all six sides by members made of a material having thermal insulation properties, that is, the first insulating member 12 located below, the second insulating member 17 located on the side, and the third insulating member 18 located above. The battery module 90, when housed in this space, comes into direct contact with the upper surface 111 of the lower panel 11.

[0027] According to this configuration, the amount of heat exchanged between the temperature control fluid flowing through the temperature control path 20 and members other than the battery module 90 can be reduced. In particular, since the lower part of the temperature control path 20 is covered with the first insulating material 12, the amount of heat exchanged between the temperature control fluid flowing through the temperature control path 20 and members other than the battery module 90 can be reduced compared to a configuration in which the first insulating material 12 is not provided and a space exists. Note that since air also has thermal conduction such as convection, even if the thermal conductivity of the first insulating material 12 is higher than that of air, the amount of heat escaping from the temperature control fluid flowing through the temperature control path 20 through the first insulating material 12 can be made smaller than the amount of heat escaping through the space (air). And, if the thermal conductivity of the first insulating material 12 is 0.040 (W / m·K) or less, the amount of heat escaping through the first insulating material 12 is smaller than the amount of heat escaping through the space (air). For this reason, the efficiency of temperature control of the battery module 90 can be improved. Specifically, when the battery module 90 is heated by the temperature control fluid, the heat of the temperature control fluid flowing through the temperature control path 20 is transferred via the lower panel 11 to the battery module 90 placed on the upper surface 111 of the lower panel 11. On the other hand, since the first insulating member 12 is located below the temperature control path 20, the heat of the temperature control fluid flowing through the temperature control path 20 is less likely to be transferred below the temperature control path 20 compared to a configuration in which the first insulating member 12 is not located and a space exists.

[0028] As a result, it is possible to increase the amount of heat transferred from the temperature control fluid to the battery module 90 through the lower panel 11. Furthermore, when the battery module 90 is cooled by the temperature control fluid, because the lower side of the temperature control path 20 is the first insulating member 12, heat is unlikely to be transferred from the outside below the case 10a to the temperature control fluid flowing through the temperature control path 20. Therefore, it is possible to increase the amount of heat that can be absorbed from the battery module 90 by the temperature control fluid flowing through the temperature control path 20.

[0029] In this embodiment, a part of the lower surface of the lower panel 11 forms the inner circumferential surface of the temperature control path 20, so that the temperature control fluid flowing through the temperature control path 20 directly contacts the lower panel 11. For this reason, it is possible to improve the efficiency of heat transfer compared to a configuration in which the temperature control path 20 is formed by a member separate from the lower panel 11, or a configuration in which a member (a member separate from the lower panel 11) in which the temperature control path 20 is provided is attached to the lower panel 11.

[0030] In addition, in a conventional configuration in which a space is provided between the lower panel 11 and the share panel 16, the heat of the temperature control fluid flowing through the temperature control path 20 is transferred to the outside of the case 10a through the air present below the lower panel 11. In addition, the heat received by the share panel 16 of the case 10a is transferred to the temperature control fluid flowing through the temperature control path 20 through the air present below the lower panel 11. In contrast, in this embodiment, the first insulating member 12 is formed of a material with a lower thermal conductivity than air, so that the amount of heat transferred from the temperature control fluid flowing through the temperature control path 20 to the outside below the case 10a and the amount of heat transferred from the outside below the case 10a to the temperature control fluid flowing through the temperature control path 20 can be reduced compared to a conventional configuration in which a space is provided between the lower panel 11 and the share panel 16.

[0031] Second Embodiment Next, a second embodiment will be described. The same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof may be omitted. Fig. 4 is an exploded perspective view showing the configuration of the case 10b according to the second embodiment, and Fig. 5 is a cross-sectional view showing the configuration of the case 10b according to the second embodiment.

[0032] As shown in FIG. 4 and FIG. 5, the case 10b according to the second embodiment includes a path member 30 disposed between the lower panel 11 and the first heat insulating member 12 along the path groove portion 301 of the first heat insulating member 12. The path member 30 is an example of the second plate member of the present invention. The path member 30 is a member formed of a metal material having high thermal conductivity, similar to the lower panel 11. The path member 30 is provided with a path groove portion 301. The path groove portion 301 is a bottomed groove-shaped portion that is open on the upper side and closed on the lower side. In this embodiment, the path groove portion 301 is formed by plastic processing such as pressing or extrusion. Therefore, a convex portion corresponding to the path groove portion 301 is provided on the lower surface of the path member 30. The path member 30 is then joined to the lower surface of the lower panel 11.

[0033] The upper surface of the first insulation member 12 has a shape corresponding to the shape of the lower surface of the route member 30 so as to be in surface contact with the entire lower surface of the route member 30. Specifically, the upper surface of the first insulation member 12 is provided with a groove-shaped portion into which a convex portion corresponding to the route groove portion 301 of the route member 30 can be fitted. The first insulation member 12 is disposed below the route member 30 so that the upper surface of the first insulation member 12 is in surface contact with the lower surface of the route member 30. In other words, the route member 30 is disposed so as to fit along the route groove portion 301 of the first insulation member 12.

[0034] In this manner, the lower panel 11, the path member 30, the first insulation member 12, and the shear panel 16 are stacked in this order from the top. Then, the temperature control path 20 is provided between the lower panel 11 and the path member 30 (in other words, inside the laminate formed by the lower panel 11 and the path member 30). That is, similar to the first embodiment, the temperature control path 20 is provided between the lower panel 11 and the insulation member 12.

[0035] As in the first embodiment, the first insulation member 12 and the share panel 16 may be integrally joined members. Alternatively, the lower panel 11, the path member 30, the first insulation member 12, and the share panel 16 may be integrally joined members. For example, the lower panel 11 and the path member 30 are joined by brazing, laser welding, or the like. When molding the first insulation member 12 by injection molding of a resin material, a method can be applied in which the first insulation member 12, the share panel 16, and the joined body of the lower panel 11 and the path member 30 are integrally molded (joined) by insert molding.

[0036] According to this configuration, the same effect as that of the first embodiment can be achieved. Furthermore, compared to the first embodiment, the amount of heat exchanged between the temperature control fluid and the battery module 90 can be increased. That is, if the path member 30 is formed of a material with high thermal conductivity like the lower panel 11, the contact area of ​​the temperature control fluid with the "member with high thermal conductivity" is larger than in a configuration in which the path member 30 is not provided. Furthermore, the path member 30 forms a "heat transfer path between the temperature control fluid and the battery module 90". Therefore, the amount of heat exchanged between the temperature control fluid and the battery module 90 can be increased. Also, as described above, when the first insulation member 12 and the share panel 16 are integrally joined members, or when the first insulation member 12, the share panel 16, and the assembly of the lower panel 11 and the path member 30 are integrally joined members, the number of steps for assembling the case 10b can be reduced.

[0037] <Summary of the embodiment> The vehicle battery cases (cases 10a and 10b) according to the embodiments of the present invention are as follows: A plate-shaped first plate member (lower panel 11) configured so that a battery (battery module 90) can be placed on an upper surface (upper surface 111); a heat insulating member (first heat insulating member 12) disposed below the first plate member (lower panel 11); Equipped with Between the first plate member (lower panel 11) and the insulating member (first insulating member 12), a hollow path (temperature control path 20) is provided through which a temperature control fluid can flow, which is a fluid for adjusting the temperature of the battery (battery module 90) placed on the upper surface (upper surface 111) of the first plate member (lower panel 11).

[0038] According to the battery case for a vehicle (cases 10a, 10b) of each embodiment, it is possible to increase the amount of heat exchanged between the temperature control fluid flowing through the path (temperature control path 20) and the battery (battery module 90) (reduce the amount of heat exchanged between the temperature control fluid and members other than the battery (battery module 90)). When the battery (battery module 90) is heated by the temperature control fluid, the heat of the temperature control fluid flowing through the path (temperature control path 20) is transferred to the battery (battery module 90) placed on one surface (upper surface 111) of the first plate member (lower panel 11) via the first plate member (lower panel 11). On the other hand, since a heat insulating member (first heat insulating member 12) is arranged on the opposite side (lower side) of the one surface (upper surface) of the path (temperature control path 20), the heat of the temperature control fluid flowing through the path (temperature control path 20) is not easily transferred downward from the path (temperature control path 20). As a result, a large amount of heat can be transferred from the temperature control fluid to the battery (battery module 90) through the first plate member (lower panel 11). Furthermore, when the battery (battery module 90) is cooled by the temperature control fluid, since a heat insulating member (first heat insulating member 12) is arranged on the lower side of the path (temperature control path 20), heat is not easily transferred from the outside below the battery case (cases 10a, 10b) to the temperature control fluid flowing through the path (temperature control path 20). This makes it possible to increase the amount of heat that the temperature control fluid flowing through the path (temperature control path 20) can absorb from the battery (battery module 90).

[0039] In the battery case (case 10a) for a vehicle according to the first embodiment, A groove portion (path groove portion 121) opening toward the first plate member (lower panel 11) is provided on a surface (upper surface) of the heat insulating member (first heat insulating member 12) close to the first plate member (lower panel 11), The path (temperature adjustment path 20) is formed by a groove portion (path groove portion 121) provided in an insulating member (first insulating member 12) and a first plate member (lower panel 11) covering the opening of the groove portion (path groove portion 121).

[0040] In this configuration, a part of the lower surface of the first plate member (lower panel 11) forms a part of the inner circumferential surface of the path (temperature control path 20), so that the temperature control fluid flowing through the path (temperature control path 20) directly contacts the first plate member (lower panel 11). This makes it possible to increase the amount of heat exchanged between the temperature control fluid and the battery (battery module 90) via the first plate member (lower panel 11).

[0041] The vehicle battery case (case 10b) according to the second embodiment is a second plate member (pathway member 30) disposed between a first plate member (lower panel 11) and a heat insulating member (first heat insulating member 12); A groove portion (pathway groove portion 301) that opens toward the first plate member (lower panel 11) is provided on a surface (upper surface) of the second plate member (pathway member 30) facing the first plate member (lower panel 11), The path (temperature adjustment path 20) is formed by a groove portion (path groove portion 301) provided in a second plate member (path member 30) and a first plate member (lower panel 11) covering the opening of the groove portion (path groove portion 301).

[0042] According to the vehicle battery case (case 10b) of the second embodiment, the contact area between the temperature control fluid and the "member with high thermal conductivity" is larger than in a configuration in which the second plate member (pathway member 30) is not provided. Furthermore, the second plate member (pathway member 30) forms a "heat transfer path between the temperature control fluid and the battery (battery module 90)". This makes it possible to increase the amount of heat exchanged between the temperature control fluid and the battery (battery module 90).

[0043] The vehicle battery cases (cases 10a and 10b) according to the respective embodiments are as follows: A third plate member (share panel 16) is provided below the heat insulating member (first heat insulating member 12), The first plate member (lower panel 11), the second plate member (pathway member 30), the heat insulating member (first heat insulating member 12), and the third plate member (share panel 16) are integrally formed.

[0044] In addition, the vehicle battery cases (cases 10a and 10b) according to the respective embodiments are A third plate member (share panel 16) is provided below the heat insulating member (first heat insulating member 12), The first plate member (lower panel 11), the heat insulating member (first heat insulating member 12), and the third plate member (share panel 16) may be integrally formed.

[0045] According to the vehicle battery case (10a, 10b) of each embodiment, the first plate member (lower panel 11), the second plate member (pathway member 30), the heat insulating member (first heat insulating member 12), and the third member (share panel 16) are integrally molded, so that the number of manufacturing steps can be reduced in the manufacturing process of the vehicle battery case (10a, 10b) compared to a configuration in which the heat insulating member (first heat insulating member 12) and the third member (share panel 16) that are separate from each other are assembled. The same effect can be achieved even with a configuration in which the first plate member (lower panel 11), the heat insulating member (first heat insulating member 12), and the third plate member (share panel 16) are integrally formed.

[0046] In the vehicle battery case (cases 10a, 10b) according to each embodiment of the present invention, The heat dissipation amount of the heat insulating member (first heat insulating member 12) is lower than the heat dissipation amount of air.

[0047] According to the vehicle battery case (cases 10a, 10b) of each embodiment, the heat dissipation amount of the insulating member (first insulating member 12) is lower than the heat dissipation amount of air, so that the amount of heat (heat dissipation amount) released from the temperature control fluid flowing through the path (temperature control path 20) to the outside and downward of the vehicle battery case (cases 10a, 10b) can be reduced compared to a configuration in which a space is provided between the first plate member (lower panel 11) and the third plate member (share panel 16).

[0048] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

[0049] For example, in each of the above-described embodiments, the lower panel 11 is configured to be laminated over substantially the entire upper surface of the first insulating member 12, but the configuration of the lower panel 11 is not limited to this. The lower panel 11 may be configured to be in contact with the lower surface of the battery module 90 and to close the path groove portion 121 of the first insulating member 12. For this reason, the lower panel 11 may be configured to be partially laminated over the upper surface of the first insulating member 12.

[0050] The dimensions and shapes of the front frame 13, rear frame 14, and left and right side frames 15 are not limited to those in the above embodiment. The materials of the lower panel 11, front frame 13, rear frame 14, left and right side frames 15, and share panel 16 are not limited to aluminum alloy. Various metal materials can be used for each of these members.

[0051] The left and right side frames 15 may also be provided with energy absorbing parts. The energy absorbing parts are parts configured to absorb the energy of a side collision or the like by compressively deforming in the vehicle width direction when a side collision or the like occurs to the vehicle. The energy absorbing parts may be provided in the internal space of the left and right side frames 15, or may be provided so as to protrude outward in the vehicle width direction from the outer surfaces of the left and right side frames 15 in the vehicle width direction. The left and right side frames 15 may also have the function of a side rocker of the vehicle. [Explanation of symbols]

[0052] 10... battery case for vehicle, 11... lower panel, 12... first heat insulating member, 20... temperature control path, 30... path member, 90... battery module, 121... path groove portion provided in first heat insulating member

Claims

1. A plate-shaped first plate member configured so that a battery can be placed on an upper surface thereof; A heat insulating member disposed below the first plate member; Equipped with Between the first plate member and the heat insulating member, a hollow passage through which a temperature control fluid for controlling the temperature of the battery placed on the upper surface of the first plate member can flow is provided. Vehicle battery case.

2. The battery case for a vehicle according to claim 1, A groove portion that opens toward the first plate member is provided on a surface of the heat insulating member that is closer to the first plate member, The path is formed by a groove portion provided in the heat insulating member and the first plate member covering an opening of the groove portion. Vehicle battery case.

3. The battery case for a vehicle according to claim 2, A second plate member is provided along the groove and is disposed between the first plate member and the heat insulating member. Vehicle battery case.

4. The battery case for a vehicle according to claim 3, A third plate member is provided below the heat insulating member, The first plate member, the second plate member, the heat insulating member, and the third plate member are integrally formed. Vehicle battery case.

5. The battery case for a vehicle according to claim 2, A third plate member is provided below the heat insulating member, The first plate member, the heat insulating member, and the third plate member are integrally formed. Vehicle battery case.

6. A battery case for a vehicle according to any one of claims 1 to 5, The heat dissipation amount of the heat insulating member is lower than the heat dissipation amount of air. Vehicle battery case.

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