Battery cooler

Abstract

To provide a battery cooler capable of maintaining adhesion with a battery cell more than before and improving cooling efficiency.SOLUTION: A first plate-shaped member (5) and a second plate-shaped member (6) are provided, the first plate-shaped member (5) includes a plurality of elastic portions (52), the first plate-shaped member (5) and the elastic portions (52) are integrally formed, and a relative position between a protruding end of the elastic portion (52) and the second plate-shaped member (6) is configured to be displaceable.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a battery cooler. [Background technology]

[0002] It is known that battery cells thermally expand during charging and discharging. Various cooling devices have been developed to deal with deformation of battery cells due to thermal expansion. For example, Patent Document 1 discloses a battery pack including a first elastic member and a first deformable member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Chinese Patent Application Publication No. 116799415 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the battery pack described in Patent Document 1, when the expansion of the battery cells to be cooled increases, the surface of the battery cells that comes into contact with the battery cooler deforms, reducing the adhesion between the battery cooler and the battery cells and reducing cooling efficiency. Also, the battery cooler in Patent Document 1 has multiple grooves that support the protrusions of multiple elastic parts, but the formation of the grooves reduces the contact area between the battery cells and the battery cooler by the amount of the grooves.

[0005] One aspect of the present disclosure aims to realize a battery cooler that can maintain better adhesion with the battery cell and improve cooling efficiency than conventional battery coolers by maintaining good contact with the battery cell while maintaining the contact area between the battery cell and the battery cooler and also by adapting well to deformation due to expansion of the battery cell, etc. [Means for solving the problem]

[0006] In order to solve the above problems, the battery cooler of the present invention is a battery cooler having a flow path through which a refrigerant flows, and comprises a first plate-shaped member and a pair of second plate-shaped members arranged opposite each other across the first plate-shaped member and the flow path, the first plate-shaped member has a plurality of elastic portions protruding from the first plate-shaped member toward the second plate-shaped member, the first plate-shaped member and the elastic portions are molded integrally, and the relative positions of the protruding ends of the elastic portions and the second plate-shaped member are configured to be displaceable. [Effects of the Invention]

[0007] According to one aspect of the present disclosure, by making the change in the amount of expansion of the battery cells uniform, it is possible to realize a battery cooler that can maintain closer contact with the battery cells than conventional ones and improve cooling efficiency. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing an external perspective view of a battery cooler according to an embodiment of the present disclosure and an example of its use; [Figure 2] FIG. 1 is an exploded perspective view of a battery cooler according to an embodiment of the present disclosure. [Figure 3] 1A and 1B are a front view and a partial enlarged view of a portion enclosed by a dashed line, respectively, of a partition plate according to an embodiment of the present disclosure; [Figure 4] FIG. 2 is a side view of a partition plate according to an embodiment of the present disclosure, viewed from below. [Figure 5] 10 is a diagram showing a state in which a first plate-shaped member is placed on a second flat portion of a partition plate according to an embodiment of the present disclosure, and a second groove covered by the first plate-shaped member is visible. FIG. [Figure 6] 2 is a cross-sectional view of the battery cooler shown in FIG. 1 taken along the line AA, and a partially enlarged view of the portion enclosed by the dashed line. [Figure 7] FIG. 10 is an exploded perspective view of a battery cooler according to a modified example of the present disclosure. [Figure 8] FIG. 10 is a schematic diagram showing a first plate-shaped member according to a modified example of the present disclosure. [Figure 9] 10A and 10B are schematic diagrams illustrating an elastic portion according to a modified example of the present disclosure. [Figure 10] 10 is a diagram showing an example of the arrangement of the elastic portion shown in FIG. 9. FIG. [Figure 11] 10 is a diagram showing an example of the arrangement of the elastic portion shown in FIG. 9. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present disclosure will be described in detail below. For ease of explanation, the up-down direction, left-right direction, and front-rear direction are defined as indicated by the arrows in each drawing. However, it should be noted that these directions are used to indicate relative positional relationships in a single state, and that the relative positional relationships may change depending on the installation direction of the battery cooler 1.

[0010] In this disclosure, "battery" is not limited to lithium-ion batteries, but may include other batteries such as nickel-metal hydride batteries and sodium-ion batteries.

[0011] Furthermore, "battery cells" are not necessarily limited to rectangular ones, but may also include cells of other shapes, such as cylindrical, pouch, and blade types. "Battery cells" can be installed in hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and battery electric vehicles (BEVs). However, the use of "battery cells" is not limited to in-vehicle use.

[0012] (Battery Cooler Overview) FIG. 1 is a perspective view of the appearance of a battery cooler 1 according to an embodiment of the present disclosure and a diagram illustrating an example of the battery cooler in use.

[0013] The battery cooler 1 is used to cool battery cells 2. The battery cooler 1 is used by abutting against the battery cells 2 to cool the battery cells 2 mounted on, for example, an electric vehicle. More specifically, as shown in FIG. 1 , when multiple battery cells 2 are stacked, multiple battery coolers 1 are arranged so that the front and rear surfaces of the battery cells 2 can be cooled, respectively. When the battery cooler 1 is arranged between battery cells 2, both the front and rear surfaces of the battery cooler 1 are arranged so as to abut against the front battery cell 2 and the rear battery cell, respectively.

[0014] The battery cooler 1 has a generally rectangular shape in a plan view, and as shown in FIG. 1 , the exterior shows a second plate-shaped member 6 and a nozzle 3 fixed to the second plate-shaped member 6. The pair of second plate-shaped members 6 are joined facing each other. The pair of second plate-shaped members 6 are joined by, for example, laser welding their peripheral edges 61. The shape of the battery cooler 1 is not limited to a generally rectangular shape in a plan view, and may be appropriately shaped to match the shape of the battery cells 2 to be abutted against it. Furthermore, in this embodiment, the battery cooler 1 is described as being for cooling the battery cells 2, but is not limited thereto, and may also be configured to heat the battery cells 2.

[0015] (flow path) As described above, when the peripheral edges 61 of the pair of second plate-shaped members 6 are welded, a space surrounded by the wall surfaces of the second plate-shaped members 6 is formed. This space then becomes the flow path D through which the refrigerant flows. In other words, the peripheral edges of the pair of second plate-shaped members 6 arranged opposite each other with the flow path D in between are welded.

[0016] In this embodiment, for convenience of explanation, the refrigerant flowing inside the battery cooler 1 is assumed to flow from the right to the left in the drawing (hereinafter referred to as the flow direction). However, when the flow direction is defined separately in the following explanation, the refrigerant will be assumed to flow in the defined direction. Furthermore, the flow direction is not limited to the above-mentioned direction and may change depending on the installation direction of the battery cooler 1.

[0017] The battery cooler 1 will be described in detail below with reference to FIGS. 2 to 6. FIG. 2 is an exploded perspective view of the battery cooler 1 according to an embodiment of the present disclosure. FIG. 3 is a view of a partition plate 4 according to an embodiment of the present disclosure as seen from the front, and a partially enlarged view of the portion enclosed by the dashed line. FIG. 4 is a side view of the partition plate 4 according to an embodiment of the present disclosure as seen from below. FIG. 5 is a view showing a state in which a first plate-shaped member 5 is placed on the second flat portion 42 of the partition plate 4 according to an embodiment of the present disclosure, and the second groove 48 covered by the first plate-shaped member 5 is visible. FIG. 6 is a cross-sectional view of the battery cooler 1 shown in FIG. 1 taken along the line AA, and a partially enlarged view of the portion enclosed by the dashed line.

[0018] As shown in FIG. 2, the battery cooler 1 is composed of a nozzle 3, a partition plate 4, a first plate-shaped member 5, and a second plate-shaped member 6.

[0019] (nozzle) The nozzle 3 is a cylindrical tube that guides the refrigerant sent from outside the battery cooler 1 to the inlet 63, or guides the refrigerant discharged from the outlet 64 to the outside of the battery cooler 1. The nozzle 3 is arranged, for example, concentrically with the inlet 63 and the outlet 64, and is fixed to the second plate-shaped member 6 by laser welding. Furthermore, as shown in FIG. 1 , when multiple battery cells 2 are stacked, the nozzle 3 is arranged and fixed concentrically with the inlet 63 and the outlet 64 of each of the battery coolers 1 stacked corresponding to the battery cells 2.

[0020] When multiple battery coolers 1 are connected to each other by the nozzles 3, they may be connected via a connecting member, such as a connecting pipe, that is separate from the nozzles 3. The side having the intake port 63 may be referred to as the upstream side, and the side having the exhaust port 64 may be referred to as the downstream side.

[0021] (Partition plate) 2, 3, and 4, the partition plate 4 has a first flat surface 41 at each end in the left-right direction. The partition plate 4 has a second flat surface 42 that is provided between the pair of first flat surfaces 41 and is formed to be thinner than the first flat surfaces 41. In other words, the partition plate 4 is composed of the pair of first flat surfaces 41 and the second flat surface 42.

[0022] 3, the right-side first flat surface portion 41 is shaped like a substantial triangle with the right corner as the vertex, and the left-side first flat surface portion 41 is shaped like a substantial triangle with the left corner as the vertex. However, the pair of first flat surfaces 41 is not limited to a triangle, and may be shaped appropriately to match the shape of the second plate-like member 6.

[0023] The second flat surface 42 is formed in a rectangular shape when viewed from the front. The shape of the second flat surface 42 is not limited to a rectangular shape, and may be formed appropriately to match the shape of the first plate-shaped member 5. The partition plate 4 is formed from a resin (PP: polypropylene, PE: polyethylene, PET: polyethylene terephthalate, PEEK: polyether ether ketone, etc.), but materials other than resin (stainless steel, aluminum, etc.) may also be used. The partition plate 4 may also be formed from a material having heat insulating properties.

[0024] The partition plate 4 has a first surface 43 on the front side and a second surface 44 which is the surface opposite (rear side) to the first surface 43. A first plate-shaped member 5 can be placed on each of the first surface 43 and the second surface 44. Therefore, the first surface 43 and the second surface 44 only need to be appropriately shaped to match the shape of the first plate-shaped member 5.

[0025] Additionally, fitting portions 45 are provided on the first surface 43 and the second surface 44 of the partition plate 4, respectively, to serve to position the first plate-shaped member 5 when it is placed on the partition plate 4. The fitting portions 45 are formed in a convex shape extending from the partition plate 4 toward the front or rear.

[0026] 2, 3, and 4, one fitting portion 45 is provided on the right side and two on the left side. The fitting portion 45, which is formed in a convex shape, fits into a fitted portion 51 provided on the first plate-shaped member 5. This facilitates the task of assembling the battery cooler 1 by overlapping the first plate-shaped member 5 and the partition plate 4 in the direction of the arrow shown in FIG.

[0027] The shape and number of the fitting portions 45 are not limited to those described above. The shape and number of the fitting portions 45 may be appropriately formed and the number may be appropriately set as long as they can fit into the fitted portions 51 provided on the first plate-like member 5.

[0028] When the first plate-shaped members 5 are placed on the first and second surfaces of the partition plate 4, the height in the front-rear direction is approximately the same as the height in the front-rear direction of the first flat portion 41 (see FIG. 6). In other words, the second flat portion 42, which is formed thin, is formed thin by the thickness of the first plate-shaped member 5.

[0029] It should be noted that the second flat surface portion 42 may be formed to be thinner than the first plate-shaped member 5, or may be formed to be thinner than the first plate-shaped member 5. It is sufficient that the second flat surface portion 42 is formed so that the height in the front-rear direction is lower than the height in the front-rear direction of the first flat surface portion 41, so that at least the first plate-shaped member 5 can be placed on the second flat surface portion 42.

[0030] The partition plate 4 is fixed to the second plate-like member 6 and has a first loose-fitting hole 46 into which the nozzle 3, through which the refrigerant flows, can be loosely fitted. In this embodiment, the nozzle 3 is not loosely fitted in the first loose-fitting hole 46, but is joined at positions corresponding to an inlet 63 and an outlet 64 provided on the front and rear sides of the second plate-like member 6. In other words, it is not essential to loosely fit the nozzle 3 into the first loose-fitting hole 46. When the nozzle 3 is loosely fitted into the first loose-fitting hole 46, the sizes of the inlet 63 and the outlet 64 may be appropriately formed to match the size of the nozzle 3.

[0031] (1st groove) 2, 3, and 5, the first flat portion 41 has a first groove 47. The first groove 47 is provided at a position facing the nozzle 3 when the first plate-shaped member 5 and the second plate-shaped member 6 are joined together.

[0032] The "state in which the first plate-shaped member 5 and the second plate-shaped member 6 are joined" refers to the state in which the battery cooler 1 shown in Fig. 2 is assembled. In detail, as shown in Fig. 2, the second plate-shaped member 6 → first plate-shaped member 5 → partition plate 4 → first plate-shaped member 5 → second plate-shaped member 6 are arranged in this order from the front side to the rear side, and the partition plate 4 and the first plate-shaped member 5 are housed in the recessed portion 62. Then, the peripheral portions 61 of the second plate-shaped members 6 are joined together by laser welding.

[0033] The first grooves 47 are formed so as to extend in a direction from the nozzle 3 side toward the second flat portion 42. More specifically, as shown in Fig. 3, the grooves are formed in a fan shape (radiating) from the periphery of the first loose-fitting hole 46. Note that the "direction from the nozzle 3 side toward the second flat portion 42" refers to the direction from left to right in the case of the first groove on the left side, and the direction from right to left in the case of the first groove on the right side.

[0034] (2nd groove) As shown in FIGS. 2, 3, and 5, the second flat portion 42 has second grooves 48. The second grooves 48 are connected to the first grooves 47. That is, the first grooves 47 and the second grooves 48 are continuous grooves. The second grooves 48 are formed to extend in the flow direction in which the refrigerant flows from the upstream side (right side) to the downstream side (left side). In this embodiment, four second grooves 48 are formed in the second flat portion 42. Of these, the two second grooves 48 closer to the center and sandwiched between the second grooves 48 formed at both ends in the vertical direction are formed to be shorter in length than the second grooves 48 formed at both ends in the vertical direction.

[0035] In this way, by changing the length of the second grooves 48, it is possible to uniformly distribute the refrigerant circulating inside the battery cooler 1. The length and number of the second grooves 48 may be set appropriately according to the size, shape, etc. of the battery cooler 1.

[0036] The first groove 47 and the second groove 48 allow the refrigerant to pass through the first loose-fit hole 46, be guided by the first groove 47, and flow to the second flat portion 42. The refrigerant guided by the first groove 47 and flowing to the second flat portion 42 is then guided by the second groove 48 and flows to the second flat portion 42. The first groove 47 and the second groove are formed in the first surface 43 and the second surface 44 of the partition plate 4, respectively.

[0037] (First plate-shaped member) 2 and 5, the first plate-shaped member 5 is a rectangular plate, and is a metal plate formed from a highly durable material such as stainless steel (SUS). The first plate-shaped member 5 is formed in a shape that allows it to be placed on the partition plate 4. The first plate-shaped member 5 also has a fitted portion 51 that can fit into the fitting portion 45 provided on the partition plate 4.

[0038] The fitted portion 51 serves to position the first plate-like member 5 when it is placed on the partition plate 4. The fitted portion 51 is formed to match the shape of the fitting portion 45. That is, since the fitting portion 45 has a convex shape, it is sufficient that the fitted portion 51 has a concave shape (depression) that matches the convex shape, or a through-hole into which the fitting portion 45 can be inserted.

[0039] Furthermore, the through hole into which the fitting portion 45 can be inserted may be formed so that the fitting portion 45 can be fitted loosely. In other words, when the fitting portion 45 and the fitted portion 51 are fitted together, the concave shape (recess) of the fitted portion 51 may have some play in the up-down and left-right directions. Note that the convex-concave relationship between the fitting portion 45 and the fitted portion 51 may be reversed. In other words, the fitting portion 45 may be a concave shape (recess), or may be a through hole into which the fitted portion 51 can be inserted, and the fitted portion 51 may be a convex shape.

[0040] 2 and 5, one fitted portion 51 is provided on the right side and two on the left side. The fitted portion 51 is fitted into the fitting portion 45 provided on the partition plate 4. In this way, the first plate-shaped member 5 is fitted into the fitting portion 45 of the partition plate 4 and placed on the second flat portion 42 of the partition plate 4. When the first plate-shaped member 5 is placed on the second flat portion 42, the second groove 48 is covered by the first plate-shaped member 5, as shown in FIG.

[0041] Furthermore, the first plate-shaped member 5 has a communication hole 49 at a position facing the tip of the second groove 48 in the refrigerant flow direction while covering the second groove 48. The communication hole 49 is a through-hole that allows the refrigerant flowing via the second groove 48 to flow to the front side (first surface 43 side) and rear side (second surface 44 side) of the first plate-shaped member 5.

[0042] The shape of the fitted portion 51 and the number of fitted portions 51 are not limited to those described above. The shape and number of the fitted portions 51 may be appropriately formed and the number may be appropriately set as long as they can fit into the fitting portion 45 provided on the partition plate 4.

[0043] (elastic part) The first plate-shaped member 5 has elastic portions 52 formed by cutting and raising the first plate-shaped member 5. In other words, the elastic portions 52 are formed integrally with the first plate-shaped member 5. The elastic portions 52 are, for example, leaf springs, and are formed into a wave shape as shown in FIG. 2 by bending the portions cut and raised from the first plate-shaped member 5. In detail, as shown in FIG. 6, the elastic portions 52 are formed so as to protrude from the first plate-shaped member 5 toward the second plate-shaped member 6. In FIG. 6, first plate-shaped members 5 each having elastic portions 52 are placed on the first and second surfaces of the partition plate 4.

[0044] The elastic portions 52 of the first plate member 5 placed on the first surface 43 protrude from the rear side to the front side, and absorb the force from the front side to the rear side that the second plate member 6 receives from the battery cells 2 to be cooled. The elastic portions 52 of the first plate member 5 placed on the second surface 44 protrude from the front side to the rear side, and absorb the force from the rear side to the front side that the second plate member 6 receives from the battery cells 2 to be cooled.

[0045] Furthermore, the relative position of the protruding end of the elastic portion 52 and the second plate-like member 6 is configured to be displaceable, and the "protruding end of the elastic portion 52" is the vertex of the wave shape of the elastic portion 52, and the highest part of the curve.

[0046] 6, the protruding end of the elastic part 52 abuts against or is close to the second plate-shaped member 6, and is not fixed to the inner surface of the second plate-shaped member 6. In other words, even if an external pressure is applied to the second plate-shaped member 6 and the second plate-shaped member 6 is deformed, the relative positional relationship between the protruding end of the elastic part 52 and the second plate-shaped member 6 is adjusted.

[0047] 2 and 5, by cutting and raising the elastic portion 52 from the first plate-shaped member 5, a cut-and-raised hole 53 is formed in the first plate-shaped member 5. The cut-and-raised hole 53 is a through-hole that passes through the first plate-shaped member 5 in the thickness direction (front-rear direction). The cut-and-raised hole 53 is formed so as to surround the periphery of the elastic portion 52.

[0048] The first plate-shaped member 5 is not limited to stainless steel, and any material may be used, such as aluminum or resin, as long as the elastic portion 52 and the first plate-shaped member 5 can be integrally molded. Furthermore, it is not essential that the first plate-shaped member 5 itself has elasticity. In other words, the region of the first plate-shaped member 5 where the elastic portion 52 is not provided does not have to have elasticity.

[0049] 2 and 5, a plurality of elastic portions 52 are arranged in the flow direction with a predetermined interval between adjacent elastic portions 52. More specifically, a plurality of elastic portions 52 are arranged so as to be approximately equally spaced apart in the up-down and left-right directions of the first plate-shaped member 5. The elastic portion 52 arranged on the downstream side (left side) is arranged at a position offset in the intersecting direction (up-down direction) that intersects the flow direction with respect to the elastic portion 52 arranged on the upstream side (right side).

[0050] The "offset position" refers to, for example, a case where the elastic portions 52 arranged at equal intervals in the vertical direction at the right end are set as the reference position, as shown in Fig. 5. In this case, the elastic portion 52 arranged second from the right end (downstream side) is arranged at a position offset in the vertical direction from the elastic portion 52 arranged at the reference position.

[0051] In this manner, a position that is shifted from the reference position is an offset position. In this embodiment, the multiple elastic portions 52 arranged in the vertical direction are considered to be one row, and the elastic portions 52 are arranged while changing the reference position in order from the right column to the left column.

[0052] In this way, the elastic portion 52 disposed downstream from the reference position is disposed at an offset position. Note that, as shown in Fig. 5, it is preferable, but not essential, that the elastic portion 52 be provided over the entire surface of the first plate-like member 5.

[0053] As described above, a plurality of elastic portions 52 are provided over the entire surface of the first plate-shaped member 5, and the elastic modulus of each elastic portion 52 can be adjusted when the elastic portions 52 are cut out and formed from the first plate-shaped member 5. In this embodiment, the elastic modulus of the elastic portions 52 arranged closer to the periphery of the first plate-shaped member 5 is made lower than that of the elastic portions 52 arranged closer to the center of the first plate-shaped member 5.

[0054] "Near the center" means near the center position of the first plate-shaped member 5, which is the center in the left-right direction and the center in the up-down direction. "Near the periphery" means near the periphery of the first plate-shaped member 5. The first plate-shaped member 5 may be formed so that the elastic modulus of the elastic parts 52 arranged on the outermost periphery is the lowest, and the elastic modulus of the elastic parts 52 gradually increases from the outermost periphery of the first plate-shaped member 5 toward the center of the first plate-shaped member 5.

[0055] The elastic modulus of the elastic portion 52 can be adjusted, for example, by changing the pitch p and height h of the elastic portion 52 shown in FIG. 6. "Pitch p" is the horizontal distance from one wave to the next. In other words, it is the distance between the protruding end of one wave and the protruding end of the next wave. "Height h" is the distance from the crest of one wave to the crest of the next wave, and is the vertical distance from one crest. In other words, it is the vertical distance between an imaginary line connecting the protruding ends of the elastic portion 52 on the second plate-like member 6 side and an imaginary line connecting the protruding ends of the elastic portion 52 on the partition plate 4 side.

[0056] As the distance of the pitch p becomes shorter, the elastic modulus becomes larger, and as the distance of the height h becomes shorter, the elastic modulus becomes smaller. In other words, as the distance of the pitch p becomes shorter and the distance of the height h becomes longer, the elastic modulus becomes larger, and as the distance of the pitch p becomes longer and the distance of the height h becomes longer, the elastic modulus becomes smaller. In this way, by changing the pitch p and the height h for each elastic portion 52, a first plate-shaped member 5 with an adjusted elastic modulus is formed. Note that the elastic modulus of the elastic portion 52 may be adjusted by narrowing or widening the interval between the series of waves indicated by the pitch p.

[0057] The elastic modulus may be set, for example, in a range of 2.0 MPa or less. However, the elastic modulus is not limited to a range of 2.0 MPa or less and may be set as appropriate within a range that achieves the effects of the present invention. In other words, the range of the elastic modulus is set as appropriate depending on the material, shape, size, etc. of the first plate-like member 5, and the above numerical range is merely an example.

[0058] (Second plate-shaped member) The second plate-shaped member 6 is a thin plate and is formed to fit the shape of the partition plate 4. The second plate-shaped member 6 is formed from a material that has excellent weldability and durability, such as stainless steel (SUS). The material of the second plate-shaped member 6 is not limited to stainless steel, and it may be formed from a material with high thermal conductivity, such as aluminum.

[0059] 2, the second plate-shaped member 6 has an inlet 63 and an outlet 64 into which the nozzle 3 is inserted. However, a configuration in which the nozzle 3 is inserted into the inlet 63 and the outlet 64 is not essential, and for example, the nozzle 3 may be joined at positions corresponding to the inlet 63 and the outlet 64 provided on the front and rear sides of the second plate-shaped member 6. When the nozzle 3 is joined to the inlet 63 and the outlet 64 of the second plate-shaped member 6, the size (diameter) of the inlet 63 and the outlet 64 may be formed to be smaller than the size (diameter) of the nozzle 3.

[0060] The pair of second plate-like members 6 are disposed and joined facing each other with the first plate-like member 5 and the partition plate 4 sandwiched between them, and therefore have a recess 62 capable of accommodating the first plate-like member 5 and the partition plate 4 when the pair of second plate-like members 6 are joined. The recess 62 may be formed in any appropriate shape as long as it can accommodate the first plate-like member 5 and the partition plate 4. The accommodation space formed by the recess 62 constitutes the flow path D. In other words, the second plate-like members 6 are disposed with the first plate-like member 5 and the flow path D sandwiched between them.

[0061] The partition plate 4 on which the first plate-shaped member 5 housed in the recessed portion 62 is placed is restricted from moving in the vertical and horizontal directions by the recessed portion 62. The recessed portion 62 also serves to position the partition plate 4 when placing the partition plate 4 on the second plate-shaped member 6.

[0062] The second plate-shaped member 6 has a peripheral edge portion 61 extending outward from the periphery of the recessed portion 62. The peripheral edge portion 61 is formed around the entire periphery of the recessed portion 62. The peripheral edge portion 61 is the portion where the pair of second plate-shaped members 6 are joined. In other words, the pair of second plate-shaped members 6 are joined liquid-tightly by, for example, laser welding the peripheral edge portions 61.

[0063] When joining a pair of second plate-shaped members 6, the first plate-shaped member 5 and the second plate-shaped member 6 may be joined together. In this case, the second plate-shaped member 6 and the first plate-shaped member 5 are laser-welded together with the first plate-shaped member 5 housed in the recess 62 of one of the pair of second plate-shaped members 6. Then, the other second plate-shaped member 6 may be laser-welded. In other words, the pair of second plate-shaped members 6 and the first plate-shaped member 5 may be welded together with the first plate-shaped member 5 sandwiched between the pair of second plate-shaped members 6.

[0064] (Variation) The following modifications can be applied to the present embodiment as appropriate. The modifications may be combined with each other as long as they are not technically inconsistent.

[0065] (Variation 1) This modified example will be described with reference to Fig. 7. Fig. 7 is an exploded perspective view of a battery cooler 100 according to a modified example of the present disclosure. In the above-described embodiment, the first plate-shaped member 5 is placed on the partition plate 4, but the partition plate 4 is not an essential component. For example, as shown in Fig. 7, the partition plate 4 may be omitted and the first plate-shaped member 200 may be formed in the same shape as the partition plate 4.

[0066] More specifically, the first plate-shaped member 200 has a second loose-fitting hole 201 into which the nozzle 3 can be loosely fitted. By inserting the nozzle 3 into the second loose-fitting hole 201, the relative positional relationship between the first plate-shaped member 200 and the second plate-shaped member 6 is determined.

[0067] When the battery cooler 100 is formed using only the first plate-shaped member 200 and the second plate-shaped member 6 without the partition plate 4, the elastic portion 52 is cut out and formed from the first plate-shaped member 200 so that it can be used on both the front and rear sides of the first plate-shaped member 200. In other words, the protruding end of one wave of the elastic portion 52 and the protruding end of the next wave are formed continuously, with the protruding end on one side abutting or close to the second plate-shaped member 6 on the front side and the protruding end on the other side abutting or close to the second plate-shaped member 6 on the rear side.

[0068] (Variation 2) This modified example will be described with reference to Fig. 8. Fig. 8 is a schematic diagram showing first plate-shaped members 1000 to 1005 according to a modified example of the present disclosure. As shown in Fig. 8, the arrangement pattern and shape of the elastic portions 52 provided on each of the first plate-shaped members 1000 to 1005 are not limited to a specific arrangement pattern and shape.

[0069] Only in the first plate-shaped member 1001 of FIG. 8, the coolant flows from right to left, from upper left to lower left, and from lower left to right, as shown by the arrows.

[0070] For convenience of explanation, the explanation will be given on the assumption that the first plate-shaped members 1000 to 1005 are placed on the first surface 43, and the explanation will be omitted if they are placed on the second surface 44.

[0071] For example, like the elastic portions 52 molded on the first plate-shaped member 1000, the elastic portions 52 arranged closer to the center may be arranged at a narrower spacing, and the elastic portions 52 arranged closer to the periphery of the first plate-shaped member 1000 may be arranged at a wider spacing.

[0072] In other words, the elastic portions 52 may be arranged so that the density per unit area of ​​the first plate-shaped member 1000 of the elastic portions 52 arranged closer to the center is high, and the density per unit area of ​​the first plate-shaped member 1000 of the elastic portions 52 arranged closer to the periphery is low.

[0073] Furthermore, for example, the first plate-shaped member 1001 may include a shielding portion 54. The shielding portion 54 extends from the first plate-shaped member 1001 toward the second plate-shaped member 6. In other words, it extends from the first plate-shaped member 1001 toward the front side. Furthermore, the shielding portion 54 extends so that the end portion on the second plate-shaped member 6 side abuts or is close to the second plate-shaped member 6 when the pair of second plate-shaped members 6 are joined together.

[0074] 8, the shielding portion 54 extends from the right side to the left side of the first plate-shaped member 1001, and its length extends so that it is longer on the left side of the center position of the first plate-shaped member 1001. However, the length of the shielding portion 54 in the left-right direction may be set appropriately according to the size of the first plate-shaped member 1001. It is sufficient that at least a path for the refrigerant to flow from the upper left to the lower left is secured.

[0075] That is, the shielding portion 54 is configured to partially block the flow of the refrigerant in the first plate-shaped member 1001. Note that the shielding portion 54 is not limited to being provided in the first plate-shaped member 1001, and may be provided in the second plate-shaped member 6.

[0076] Furthermore, for example, the elastic portion 52 molded on the first plate-shaped member 1002 may be arranged so that one end of the elastic portion 52 is positioned vertically downward and the other end is positioned vertically upward relative to the flow direction of the refrigerant (direction from right to left).

[0077] 8, "one end of the elastic portion 52" refers to the lower right end of each elastic portion 52, and "the other end of the elastic portion 52" refers to the upper left end of each elastic portion 52. In other words, the elastic portion 52 should be disposed obliquely with respect to the flow direction so that the lower right end of the elastic portion 52 is lower than the upper left end.

[0078] Furthermore, for example, the elastic portion 52 may be formed by combining an elastic portion 52 that is arranged diagonally with respect to the flow direction, such as the elastic portion 52 molded on the first plate-shaped member 1003, so that the lower right end of the elastic portion 52 is lower than the upper left end, and an elastic portion 52 that is arranged diagonally with respect to the flow direction, so that the lower left end of the elastic portion 52 is lower than the upper right end.

[0079] Furthermore, for example, when the elastic portions 52 arranged at equal intervals in the vertical direction at the right end, such as the elastic portions 52 molded on the first plate-shaped member 1004, are used as the reference position, the downstream elastic portion 52 does not need to be arranged at an offset position. In this case, it is sufficient that the elastic portions 52 are molded so as to be arranged approximately uniformly in the vertical and horizontal directions of the first plate-shaped member 1004.

[0080] Furthermore, for example, like the elastic portion 52 formed on the first plate-shaped member 1005, the elastic portion 52 may be formed so that the longitudinal direction of the elastic portion 52 is arranged along the up-down direction.

[0081] As described above, the elastic portion 52 has a fluid control function that changes the flow direction of the refrigerant, and the arrangement, shape, size, etc. of the elastic portion 52 may be designed appropriately depending on the object to be cooled by the battery cooler 1 and the purpose of cooling.

[0082] (Variation 3) This modified example will be described with reference to FIGS. 9, 10, and 11. FIG. 9 is a schematic diagram showing an elastic member 400 according to a modified example of the present disclosure. For ease of explanation, the elastic member 400 shown in FIG. 9 is a partial cutout of the elastic member 400 molded in the first plate-shaped member 300. FIGS. 10 and 11 are diagrams showing an example of the arrangement of the elastic member 400 shown in FIG. 10. In FIG. 10, reference numeral 2000 denotes a perspective view of the front side of the first plate-shaped member 300, reference numeral 2001 denotes a plan view of the front side of the first plate-shaped member 300, and reference numeral 2002 denotes a plan view of the rear side of the first plate-shaped member 300. In FIG. 11, reference numeral 3000 denotes a perspective view of the front side of the first plate-shaped member 300, reference numeral 3001 denotes a plan view of the front side of the first plate-shaped member 300, and reference numeral 3002 denotes a plan view of the rear side of the first plate-shaped member 300.

[0083] 9, the elastic portion 400 is not wavy, but is a leaf spring cut and raised from the first plate-shaped member 300. In other words, in the present disclosure, it is not essential that the elastic portion 400 be wavy. The elastic portion 400 includes an inclined portion 301 that is cut and raised diagonally upward from the first plate-shaped member 300, and a receiving portion 302 that extends from the end of the inclined portion 301 substantially parallel to the first plate-shaped member 300.

[0084] The elastic portion 400 is formed so that the receiving portion 302 abuts or is close to the second plate-shaped member 6 when the second plate-shaped member 6 is joined. Note that a first plate-shaped member formed by combining the elastic portion 52 of the first plate-shaped member 5 and the elastic portion 400 of the first plate-shaped member 300 is also included in the scope of the present invention.

[0085] As shown in Fig. 10, a plurality of elastic portions 400 may be arranged on the first plate-shaped member 300. In Fig. 10, three rows of six elastic portions 400 are arranged at approximately equal intervals in the left-right direction, and each row is arranged in the up-down direction.

[0086] Furthermore, a plurality of elastic portions 400 may be arranged on the first plate-shaped member 300, as shown in Fig. 11. In Fig. 11, two rows of five elastic portions 400 are arranged at approximately equal intervals in the left-right direction, and each row is provided in the up-down direction.

[0087] The arrangement and number of the elastic portions 400 are not limited to these, and may be set appropriately depending on the shape, size, etc. of the first plate-shaped member 300.

[0088] The elastic portion 400 can adjust the contact surface with the second plate-shaped member 6 on the front side (front side) and the contact surface with the partition plate 4 on the back side (rear side) by adjusting the areas of the inclined portion 301 and the receiving portion 302 cut out and raised from the first plate-shaped member 300. When the elastic portion 400 is applied to the first plate-shaped member 200 shown in FIG. 7, the contact surface on the back side (rear side) is the contact surface with the second plate-shaped member 6.

[0089] The contact surface is the lightly shaded portions indicated by reference numerals 2001 and 2002 in Fig. 10. It is also the lightly shaded portions indicated by reference numerals 3001 and 3002 in Fig. 11.

[0090] 10 and 11, the range of the contact surface on the front side is the range of the surface of the receiving portion 302 that abuts against or is close to the second plate-shaped member 6. The range of the contact surface on the back side is the range of the surface of the first plate-shaped member 300 that abuts against the partition plate 4, excluding the inclined portion 301 and the receiving portion 302.

[0091] In the example of the arrangement of the elastic part 400 shown in Fig. 10, the area ratio between the contact surface on the front side and the contact surface on the back side is designed to be about 1:6. In the example of the arrangement of the elastic part 400 shown in Fig. 11, the area ratio between the contact surface on the front side and the contact surface on the back side is designed to be about 1:1.

[0092] By adjusting the area ratio of the contact surface, it is possible to adjust the stress that the elastic portion 400 receives, that is, the elastic modulus of the elastic portion 400 can be adjusted.

[0093] Furthermore, the area of ​​the portion of the first plate-shaped member 300 that has not been cut and raised, i.e., the area of ​​the contact surface on the back side described above, may be larger than the area of ​​the portion that has been cut and raised to form the elastic portion 400, i.e., the combined area of ​​the inclined portion 301 and the receiving portion 302.

[0094] Furthermore, the direction in which the elastic portion 400 is cut out from the first plate-shaped member 300, in other words, the direction in which the fixed end and free end of the elastic portion 400 are aligned in the vertical direction, is not limited to the direction in which the fixed end and free end of the elastic portion 400 are aligned in the vertical direction as shown in Figures 10 and 11. For example, the elastic portion 400 may be cut out so that the fixed end and free end of the elastic portion 400 are aligned in the horizontal direction. Furthermore, the elastic portion 400 may be cut out so that the fixed end and free end are aligned in a direction intersecting the vertical and horizontal directions of the elastic portion 400.

[0095] As described above, with the elastic portion 400, the stress that the elastic portion 400 receives can be adjusted by adjusting the area ratio of the contact surfaces. For example, as shown in Fig. 11, if the area ratio of the contact surfaces on the front side to the contact surfaces on the back side is designed to be approximately 1:1, it is possible to adjust the stress that the elastic portion 400 receives on the front side and the back side so that it is approximately equal. Therefore, for example, if the elastic portion 400 is applied to the first plate-like member 200 shown in Fig. 7, the amount of deformation in the front-to-rear direction can be made approximately equal on the front side and the back side.

[0096] The elastic portion may be a disc spring or a coil spring (spiral) in addition to the above-described wavy elastic portion 52 and plate spring-like elastic portion 400. The disc spring-like or coil spring-like (spiral) elastic portion may be formed by cutting and raising from the first plate-like member.

[0097] (Action and effect) As described above, according to this embodiment, the following advantageous effects can be obtained.

[0098] The battery cooler (1, 100) according to aspect 1 of the present disclosure is a battery cooler (1, 100) having a flow path D through which a refrigerant flows, and comprises a first plate-shaped member (5, 200) and a pair of second plate-shaped members 6 arranged opposite each other across the first plate-shaped member (5, 200) and the flow path D, wherein the first plate-shaped member (5, 200) comprises a plurality of elastic portions 52 protruding from the first plate-shaped member (5, 200) toward the second plate-shaped member 6, the first plate-shaped member (5, 200) and the elastic portions 52 are integrally molded, and the relative positions of the protruding ends of the elastic portions 52 and the second plate-shaped member 6 are configured to be displaceable.

[0099] According to the above configuration, the first plate-shaped member (5, 200) and the multiple elastic portions 52 are integrally molded. This makes it possible to adjust the elastic modulus of each elastic portion 52 in the same plate material, the first plate-shaped member (5, 200), for example, by increasing the elastic modulus of the elastic portions 52 provided closer to the center of the first plate-shaped member (5, 200) and decreasing the elastic modulus of the elastic portions provided closer to the outer edge.

[0100] The configuration is also such that the relative position of the protruding end of the elastic portion 52 and the second plate-shaped member 6 can be displaced. For example, if the battery cell 2 to be cooled expands during charging, pressure due to the expansion is applied to the contact surface between the battery cell 2 and the second plate-shaped member 6, and the contact surface of the second plate-shaped member 6 with the battery cell 2 may be deformed.

[0101] Even in such a case, the positional relationship between the protruding end of the elastic portion 52 and the second plate-shaped member 6 is adjusted, so distortion of the second plate-shaped member 6 can be reduced compared to when the elastic portion 52 is fixed to the second plate-shaped member 6. Therefore, by maintaining good contact with the battery cells 2 while maintaining the contact area between the battery cells 2 and the battery cooler (1, 100) and also following deformation due to expansion of the battery cells 2 well, a battery cooler (1, 100) can be realized that maintains closer contact with the battery cells 2 than conventional ones and can improve cooling efficiency.

[0102] The battery cooler (1, 100) according to aspect 2 of the present disclosure may be configured as in aspect 1 above, wherein each of the plurality of elastic portions 52 is arranged at a predetermined interval from an adjacent elastic portion 52 in the flow direction in which the refrigerant flows from the upstream side to the downstream side, and the elastic portion 52 arranged on the downstream side is arranged at a position offset in a cross direction that intersects the flow direction relative to the elastic portion 52 arranged on the upstream side.

[0103] According to the above configuration, the downstream elastic portion 52 is offset in a direction intersecting the flow direction relative to the upstream elastic portion 52. As a result, the refrigerant that passes between the upstream elastic portion 52 and the downstream elastic portion 52 passes through the downstream elastic portion 52. This generates turbulence in the cooler, preventing the refrigerant flow from becoming uneven within the flow path. This improves cooling efficiency.

[0104] A battery cooler (1, 100) according to aspect 3 of the present disclosure may be configured such that, in the above-mentioned aspect 1 or 2, the elastic portion 52 is arranged on the first plate-shaped member (5, 200) so that one end of the elastic portion 52 is positioned vertically downward and the other end is positioned vertically upward with respect to the flow direction of the refrigerant from the upstream side to the downstream side.

[0105] According to the above configuration, the elastic portion 52 is arranged on the first plate-shaped member (5, 200) so that one end of the elastic portion 52 is positioned vertically downward and the other end is positioned vertically upward. This allows the flow of the refrigerant to be guided in a direction against gravity. This prevents the flow of the refrigerant from becoming uneven within the flow path. This allows the temperature distribution on the cooling surface to be uniform, improving cooling efficiency.

[0106] The battery cooler (1, 100) according to aspect 4 of the present disclosure may be configured such that, in any of aspects 1 to 3 above, the first plate-shaped member (5, 200) further includes a shielding portion 54 extending from the first plate-shaped member (5, 200) toward the second plate-shaped member 6 and partially shielding the flow of the refrigerant.

[0107] According to the above configuration, the first plate-shaped member (5, 200) has a shielding portion 54 that partially shields the flow of the refrigerant. This makes it possible to regulate the flow of the refrigerant in the flow path D and prevent the flow of the refrigerant from becoming uneven within the flow path D. In addition, it is possible to create opposing flows of the refrigerant, such as a flow from right to left and a flow from left to right, sandwiching the shielding portion 54 between them. This makes it possible to uniform the temperature distribution on the cooling surface and improve the cooling efficiency.

[0108] The battery cooler (1, 100) according to aspect 5 of the present disclosure may be configured in the above aspects 1 to 4 such that, among the multiple elastic portions 52, the elastic portions 52 arranged closer to the periphery of the first plate-shaped member (5, 200) have a lower elastic modulus than the elastic portions 52 arranged closer to the center of the first plate-shaped member (5, 200).

[0109] According to the above configuration, the elastic modulus of the elastic portions 52 arranged closer to the periphery of the first plate-shaped member 5 is lower than that of the elastic portions 52 arranged closer to the center of the first plate-shaped member (5, 200). Here, it is generally known that when the battery cell 2 to be cooled expands during charging, the amount of expansion increases the closer to the center of the battery cell 2.

[0110] Furthermore, by making the change in the amount of expansion of the battery cells 2 as uniform as possible, deterioration of the battery cells 2 can be reduced. Therefore, with the above configuration, elastic parts 52 with a high elastic modulus can be arranged in parts of the battery cells 2 where the amount of expansion is large, and elastic parts 52 with a low elastic modulus can be arranged in parts of the battery cells 2 where the amount of expansion is small. This allows for good contact with the battery cells 2 while maintaining the contact area between the battery cells 2 and the battery cooler (1, 100), and also allows for good adaptation to deformation due to expansion of the battery cells 2. Furthermore, adhesion between the second plate-shaped member 6 and the battery cells 2 can be maintained, improving cooling efficiency.

[0111] The battery cooler (1, 100) according to aspect 6 of the present disclosure may be configured such that, in any of aspects 1 to 5 above, the spacing between the elastic portions 52 arranged closer to the center of the plurality of elastic portions 52 is narrow, and the spacing between the elastic portions 52 arranged closer to the periphery of the first plate-shaped member (5, 200) is wide.

[0112] According to the above configuration, the spacing between the elastic portions 52 arranged closer to the center is narrower. In other words, the density per unit area of ​​the first plate-shaped member (5, 200) is higher closer to the center. This allows the elastic portions 52 arranged closer to the center and the periphery of the first plate-shaped member (5, 200) to smoothly follow deformation due to expansion of the battery cells 2 and the like without changing the elastic coefficients depending on their positions.

[0113] The battery cooler 1 according to aspect 7 of the present disclosure may be configured in any of aspects 1 to 6 above, further comprising partition plates 4 that can be arranged on the first surface 43 of the first plate-shaped member 5 and on the second surface 44, which is the surface opposite to the first surface 43.

[0114] According to the above configuration, the first plate-shaped members (5, 200) can be disposed on the first surface 43 and the second surface 44 of the partition plate 4, respectively. This suppresses heat transfer in the stacking direction of the battery cells 2. Therefore, for example, when multiple battery cells 2 are stacked, by placing a battery cooler (1, 100) having the above configuration between the battery cells 2, it is possible to suppress heat transfer from one battery cell 2 to another battery cell 2.

[0115] The battery cooler 1 according to aspect 8 of the present disclosure may be configured in any of aspects 1 to 7 above, further comprising a partition plate 4 that can be arranged on a first surface 43 of the first plate-shaped member (5, 200) and on a second surface 44 opposite the first surface, and the partition plate 4 is fixed to the second plate-shaped member 6 and has a first loose-fitting hole 46 into which a nozzle 3 through which the refrigerant flows can be loosely fitted.

[0116] According to the above configuration, the partition plate 4 has the first loose-fitting hole 46. This allows the nozzle 3 fixed to the second plate-shaped member 6 to be loosely fitted into the partition plate 4. Furthermore, loosely fitting the nozzle 3 positions the partition plate 4 and the second plate-shaped member 6, preventing the elastic portion 52 from shifting in position relative to the battery cell 2. This allows the second plate-shaped member 6 to maintain close contact with the battery cell 2, improving cooling efficiency.

[0117] The battery cooler 100 according to aspect 9 of the present disclosure may be configured such that, in the above aspects 1 to 6, the first plate-shaped member 200 is fixed to the second plate-shaped member 6 and further includes a second loose-fitting hole 201 into which a nozzle 3 through which the refrigerant flows can be loosely fitted.

[0118] According to the above configuration, the first plate-shaped member 200 has the second loose-fitting hole 201. This allows the nozzle 3 fixed to the second plate-shaped member 6 to be loosely fitted into the first plate-shaped member 200. Furthermore, loosely fitting the nozzle 3 positions the first plate-shaped member 200 and the second plate-shaped member 6, thereby preventing the elastic portion 52 from shifting out of position relative to the battery cell 2. This allows the second plate-shaped member 6 and the battery cell 2 to maintain close contact with each other, improving cooling efficiency.

[0119] The battery cooler 1 according to aspect 10 of the present disclosure is, in the above aspects 1 to 8, further provided with a partition plate 4 that can be arranged on a first surface 43 of the first plate-shaped member 5 and a second surface 44 that is the surface opposite to the first surface 43, and the partition plate 4 is composed of a pair of first flat surfaces 41 and a second flat surface 42 that is provided between the pair of first flat surfaces 41 and is formed thinner than the first flat surfaces 41, the elastic portion 52 is formed by cutting and raising from the first plate-shaped member 5, and the first flat surface 41 is formed by cutting and raising from the first plate-shaped member 5, and the second flat surface 42 is formed by cutting and raising from the first plate-shaped member 5, and the elastic portion 5 ... When the member 5 and the second plate-shaped member 6 are joined together, the first plate-shaped member 5 may be fixed to the second plate-shaped member 6, provided at a position opposite the nozzle 3 through which the refrigerant flows, and provided with a first groove 47 extending from the nozzle 3 side toward the second flat portion 42, the second flat portion 42 being connected to the first groove 47 and provided with a second groove 48 extending in the flow direction of the refrigerant from the upstream side to the downstream side, and the first plate-shaped member 5 may be placed on the second flat portion 42 so as to cover the second groove 48.

[0120] According to the above configuration, the partition plate 4 has a pair of first flat portions 41 and second flat portions 42. The first flat portion 41 has a first groove 47, and the second flat portion 42 has a second groove 48. This makes it possible to form a path for circulating the refrigerant in the flow path D via the first groove 47, and a path for circulating the refrigerant in the flow path D via the second groove 48 extending in the flow direction.

[0121] This allows the coolant flowing through the second grooves 48 to flow through the flow path D without being affected by heat transfer from the battery cells 2. Furthermore, because the first plate-shaped member 5 has elastic portions 52 formed by cutting and raising the first plate-shaped member 5, the coolant can flow through the flow path D via the cut and raised holes 53 formed by cutting and raising the first plate-shaped member 5. This makes it possible to uniform the temperature distribution on the cooling surface and improve cooling efficiency.

[0122] The battery cooler 1 according to aspect 11 of the present disclosure may be configured in the above aspects 1 to 8 and 10 such that the first plate-shaped member 5 further includes a partition plate 4 that can be arranged on a first surface 43 and a second surface 44 that is the surface opposite to the first surface 43, and the first plate-shaped member 5 further includes an engaging portion 51 that can engage with an engaging portion 45 provided on the partition plate 4.

[0123] According to the above configuration, the first plate-shaped member 5 and the partition plate 4 are positioned by the fitted portions 51 of the first plate-shaped member 5 and the fitting portions 45 of the partition plate 4. This prevents the elastic portions 52 from being misaligned with respect to the battery cells 2. This maintains close contact between the second plate-shaped member 6 and the battery cells 2, improving cooling efficiency.

[0124] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. [Explanation of symbols]

[0125] 1, 100 battery cooler 5. First plate-shaped member 6. Second plate-shaped member 52, 400 Elastic part D flow path

Claims

1. A battery cooler having a flow path through which a refrigerant flows, A first plate-shaped member; a pair of second plate-like members arranged opposite to each other with the first plate-like member and the flow path therebetween; Equipped with The first plate-shaped member is a plurality of elastic portions protruding from the first plate-like member toward the second plate-like member; the first plate-shaped member and the elastic portion are integrally formed, The relative position of the protruding end of the elastic portion and the second plate-like member is displaceable. A battery cooler characterized by:

2. Each of the plurality of elastic portions is disposed at a predetermined interval from an adjacent elastic portion in a flow direction in which the refrigerant flows from the upstream side to the downstream side, and the elastic portion disposed on the downstream side is disposed at a position offset in a cross direction intersecting the flow direction with respect to the elastic portion disposed on the upstream side. The battery cooler according to claim 1 .

3. The elastic portion is disposed on the first plate-shaped member such that one end of the elastic portion is positioned vertically downward and the other end is positioned vertically upward with respect to a flow direction of the refrigerant from the upstream side to the downstream side. The battery cooler according to claim 1 .

4. The first plate-shaped member is The cooling device further includes a shielding portion that extends from the first plate-shaped member toward the second plate-shaped member and partially shields the flow of the refrigerant. The battery cooler according to claim 1 .

5. Among the plurality of elastic portions, the elastic portions arranged closer to the periphery of the first plate-like member have a lower elastic modulus than the elastic portions arranged closer to the center of the first plate-like member. The battery cooler according to claim 1 .

6. Among the plurality of elastic portions, the elastic portions arranged closer to the center are spaced apart at a narrower interval, and the elastic portions arranged closer to the periphery of the first plate-like member are spaced apart at a wider interval. The battery cooler according to claim 1 .

7. The first plate-shaped member further includes partition plates that can be arranged on a first surface and a second surface that is the surface opposite to the first surface. The battery cooler according to claim 1 .

8. The first plate-shaped member further includes partition plates that can be arranged on a first surface and a second surface that is a surface opposite to the first surface, The partition plate is fixed to the second plate-shaped member and has a first loose-fitting hole into which a nozzle through which the refrigerant flows can be loosely fitted. The battery cooler according to claim 1 .

9. The first plate-shaped member is fixed to the second plate-shaped member and further includes a second loose-fitting hole into which a nozzle through which the refrigerant flows can be loosely fitted. The battery cooler according to any one of claims 1 to 6.

10. The partition plate is a pair of first flat surfaces and a second flat surface provided between the pair of first flat surfaces and formed to be thinner than the first flat surfaces; the elastic portion is formed by cutting and raising the first plate-shaped member, The first planar portion is a first groove that is fixed to the second plate-shaped member in a state in which the first plate-shaped member and the second plate-shaped member are joined together, that is provided at a position facing a nozzle through which the coolant flows, and that extends from the nozzle side toward the second flat portion; The second planar portion is a second groove connected to the first groove and extending in a flow direction in which the refrigerant flows from an upstream side to a downstream side; the first plate-like member is placed on the second flat surface portion so as to cover the second groove; 9. The battery cooler according to claim 7 or 8.

11. The first plate-shaped member further includes a fitted portion into which a fitting portion provided on the partition plate can be fitted. The battery cooler according to claim 10 .

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