METHOD OF MANUFACTURING A HEAT EXCHANGER AND HEAT EXCHANGER

Abstract

A heat exchanger manufactured according to a method of the present disclosure comprises a first metal plate and a second metal plate, as well as a zigzag metal plate containing a third, zigzag-shaped metal plate. The zigzag metal plate has several peak sections that align with the first metal plate and several valley sections that align with the second metal plate. The third metal plate is easily deformable. The method includes: providing a layered plate by stacking the first metal plate, the third metal plate, and the second metal plate in that order; joining the first metal plate and the third metal plate in regions of the layered plate corresponding to the peak sections; and joining the second metal plate and the third metal plate in regions of the layered plate corresponding to the valley sections.

Description

BACKGROUND Technical Area

[0001] The present disclosure relates to a method of manufacturing a heat exchanger and a heat exchanger. Related state of the art

[0002] Heat exchangers are commonly used to cool or heat a heat exchange target (e.g., a battery).

[0003] JP 2013-111 640 A discloses a method for manufacturing a heat exchanger. The method disclosed in JP 2013-111 640 A comprises a circumferential welding step, a pressure reduction step, an internal welding step, and an expansion step. The circumferential welding step, the pressure reduction step, the internal welding step, and the expansion step are performed in this order. A Fig. The heat exchanger 900 shown in Figure 9 is manufactured according to the method disclosed in JP 2013-111 640 A. The heat exchanger 900 is a plate-shaped object.

[0004] In the circumferential welding step, two plate elements 910, 920 are placed one on top of the other, and the weld seam 930 is formed by a laser around the entire circumference of the outer peripheral end surface. In the pressure reduction step, air remaining in the gap between the two plate elements 910, 920 is drawn out by a vacuum pump from openings pre-provided in the respective plate surfaces of the two plate elements 910, 920 and discharged to the outside. In the internal welding step, while the pressure-reduced state of the gap between the two plate elements 910, 920 is maintained, weld seams 940 are formed by a laser on the plate surfaces of both plate elements 910, 920, thus dividing the two plate elements 910, 920 into expansion sections 901 and a non-expansion section 902.In the expansion step, a fluid under pressure is fed into the expansion sections 901, so that the expansion sections 901 are deformed, causing them to expand.

[0005] In a heat exchanger 900, heat exchange is carried out between the fluid flowing through the expansion sections 901 and the fluid at the periphery, i.e. the outside of the heat exchanger 900, by passing the fluid through the expansion sections 901.

[0006] As in Fig. As shown in Figure 9, the two main surfaces of the heat exchanger 900 have a convex-concave shape. In a housing where a heat exchange target is brought into direct contact with a main surface of the heat exchanger 900, it is quite possible that the heat exchange target will only touch parts of the main surface of the heat exchanger 900 (in particular, only the multiple expansion sections 901). Therefore, it is likely that the heat exchange with the target of the heat exchanger will not be efficient. Furthermore, in a housing where a heat exchange target is brought into indirect contact with a main surface of the heat exchanger 900 via a thermally conductive material (e.g., a thermally conductive paste), the concave sections of the convex-concave shape of the main surface of the heat exchanger 900 must be filled with the thermally conductive material so that the heat exchange with the target of the heat exchange can be carried out efficiently.There is a concern that a large amount of the heat-conducting material will be consumed. Therefore, a method for manufacturing a heat exchanger is needed that allows for the production of a heat exchanger whose two main surfaces are flat.

[0007] DE 38 10 865 A1 discloses a method for forming three-dimensional monolithic structures from aluminum or aluminum alloys. For example, an aluminum structure can be obtained by providing a three-sheet component core sandwich structure, which is built up from three sheets and has stop material areas, and then introducing pressurized gas via one or more injection needles arranged between the sheets in such a way that the sheets are stretched and superplastically formed into the desired shape.

[0008] Another method for forming three-dimensional structures is known from DE 32 28 170 A1.

[0009] US patent 4,603,089 A1 discloses a method for welding multi-sheet structures. SUMMARY

[0010] The present disclosure was made in light of the circumstances described above.

[0011] One topic addressed by embodiments of the present disclosure is the provision of a method for manufacturing a heat exchanger, by which a heat exchanger whose two main surfaces are planar can be manufactured, as well as a corresponding heat exchanger.

[0012] The following examples are examples of methods for addressing the above-mentioned issue. <1> A method of manufacturing a heat exchanger according to a first aspect of the present disclosure is a method of manufacturing a heat exchanger wherein: the heat exchanger comprises a first metal plate with at least one first through-hole, a second metal plate with at least one second through-hole and a zigzag metal plate arranged between the first metal plate and the second metal plate, wherein the zigzag metal plate is formed from a third metal plate in the form of a flat plate which is formed in a zigzag shape, The zigzag metal plate has several mountain sections that connect with the first metal plate, and several valley sections that connect with the second metal plate. first flow paths, connected to at least one of the first through-holes, are formed between the first metal plate and the zigzag metal plate, and second flow paths, connected to at least one of the second through-holes, are formed between the second metal plate and the zigzag metal plate, and The third metal plate, which is in the form of a flat plate, deforms more easily than the first or the second metal plate because it has a lower stiffness than both the first and the second metal plate. the procedure comprises the following steps: Providing a layered plate by layering the first metal plate, the third metal plate formed in the form of a flat plate, and the second metal plate in that order; Joining the first metal plate and the third metal plate, which is shaped like a flat plate, in regions of the layered plate corresponding to the mountain sections, by brazing; and Joining the second metal plate and the third metal plate, which is in the form of a flat plate, in regions of the layered plate corresponding to the valley sections, by brazing.

[0013] "Zigzag" refers to a shape that is curved like a wavy tendril (i.e., undulating). "Flow path" is a space through which a heat exchange medium flows. "Easily deformable" means the property of having relatively low stiffness and deforming easily under pressure.

[0014] In the first viewpoint, when pressurized fluid is introduced into the first or second through-hole of the layered plate, the regions of the third metal plate that constitute the respective first and second flow paths are selectively compressed, causing them to spread out and forming the first and second flow paths. At this point, it is difficult for the first or second metal plate to deform. In other words, the first and second metal plates can easily retain their shape before the pressurized fluid was introduced into the first or second through-hole of the layered plate. Consequently, the process of manufacturing a heat exchanger according to the first viewpoint can produce a heat exchanger whose two main surfaces are flat.

[0015] Furthermore, the difficult-to-deform zigzag metal plate is usually manufactured using a mold, and molds are expensive. Therefore, the method of manufacturing a heat exchanger according to the first point of view can produce a heat exchanger at low cost.

[0016] The method according to the first point further comprises supplying a fluid under pressure into at least one of the first through holes and at least one of the second through holes and pressing and widening the third metal plate formed in the form of a flat plate in order to form the third metal plate formed in the form of a flat plate into the zigzag metal plate.

[0017] In the first approach, the first flow paths are formed between the first metal plate and the zigzag metal plate, and the second flow paths are formed between the second metal plate and the zigzag metal plate. As a result, the method of manufacturing a heat exchanger according to the first approach can produce a heat exchanger whose two main surfaces are flat.

[0018] <2> A method of manufacturing a heat exchanger according to a second aspect of the present disclosure is the method of manufacturing a heat exchanger according to <1> , where: the zigzag metal plate does not have third through-holes connecting the first flow paths and the second flow paths, the multiple mountain sections comprise multiple first mountain sections designed to be spaced at a first distance along a first direction that is orthogonal to a thickness direction of the heat exchanger, and the several valley sections comprise several first valley sections, which are designed in such a way that they are spaced apart from each other at a second distance along the first direction.

[0019] From the second perspective, the zigzag metal plate has no third through-holes. This means that the first and second flow paths are independent of each other. When fluid is supplied under pressure from the first through-hole of the layered metal plate, it is easier to ensure that the pressure exerted on the first metal plate is uniform than in a housing where the multiple mountain sections do not have multiple first mountain sections designed to be spaced at a first distance. Similarly, when fluid is supplied under pressure from the second through-hole of the layered plate, it is easier to ensure that the pressure exerted on the second metal plate is uniform than in a housing where the multiple valley sections do not have multiple first valley sections designed to be spaced at a second distance.Consequently, the method for manufacturing a heat exchanger according to the third point of view can produce a heat exchanger whose two main surfaces are even flatter.

[0020] <3> A method of manufacturing a heat exchanger according to a third aspect of the present disclosure is the method of manufacturing a heat exchanger according to <2> , where: the first mountain sections and the first valley sections each extend along a second direction that is orthogonal to each of the first directions and the thickness direction of the heat exchanger, and The first mountain sections and the first valley sections are formed alternately along the first direction.

[0021] According to the third point, if a pressurized fluid is supplied from the first through-hole of the layered plate, it is easier than according to the second point to achieve a uniform distribution of the pressure exerted on the first metal plate. If a pressurized fluid is supplied from the second through-hole of the layered plate, the pressure distribution on the second metal plate is more uniform than according to the second point. Consequently, the method described by the third point allows for the production of a heat exchanger whose two main surfaces are even more flat.

[0022] <4> A method of manufacturing a heat exchanger according to a fourth aspect of the present disclosure is the method of manufacturing a heat exchanger according to one of the above points. <1> until <3> , where: The first metal plate and the second metal plate each contain a 6000 series aluminum alloy, and The third metal plate, which is in the form of a flat plate, is made of aluminum from the 1000 series.

[0023] "6000 series aluminum alloy" refers to the Al-Mg-Si aluminum alloys specified in JIS. "1000 series aluminum" means pure aluminum according to JIS.

[0024] The stiffness of 1000 series aluminum is lower than that of 6000 series aluminum alloys. This is because the third metal plate is more easily deformed than the first and second metal plates. Consequently, by manufacturing a heat exchanger according to the fourth point, a heat exchanger can be produced whose two main surfaces are flat.

[0025] <5> A method of manufacturing a heat exchanger according to a fifth aspect of the present disclosure is the method of manufacturing a heat exchanger according to one of the above points. <1> until <4> , where: the respective thickness of the first metal plate and the second metal plate is greater than or equal to 1.00 mm, and the thickness of the third metal plate, which is in the form of a flat plate, is less than 1.00 mm.

[0026] The stiffness of the third metal plate is lower than that of the first and second metal plates. This is because the third metal plate is more easily deformed than the first and second metal plates. Consequently, by manufacturing a heat exchanger according to the fifth principle, a heat exchanger can be produced whose two main surfaces are flat.

[0027] <6> A method of manufacturing a heat exchanger according to a sixth aspect of the present disclosure is the method of manufacturing a heat exchanger according to one of the above points. <1> until <5> , where: The zigzag metal plate furthermore has at least one third through-hole that connects the first flow paths and the second flow paths, the multiple mountain sections comprise multiple first mountain sections, which are designed to be spaced at a first distance along a first direction that is orthogonal to a thickness direction of the heat exchanger, the several valley sections comprise several first valley sections, which are designed in such a way that they are spaced apart from each other along the first direction at a second distance, and The first distance and the second distance are the same.

[0028] In the sixth aspect, the zigzag metal plate has one or more third through-holes. Specifically, the first and second flow paths are interconnected. The first and second through-holes are equal. Therefore, when fluid is supplied to the layered plate through the first and second through-holes, it is easier to ensure that the pressure distributions acting on the first and second metal plates are uniform, compared to a casing where the first and second through-holes are not equal. Consequently, by manufacturing a heat exchanger according to the sixth aspect, a heat exchanger can be produced whose two main surfaces are even more flat.

[0029] <7> A method of manufacturing a heat exchanger according to a seventh aspect of the present disclosure is the method of manufacturing a heat exchanger according to one of the above points. <1> until <6> , which also includes: Finishing a first brazing sheet in which a first brazing material layer is formed for joining the several mountain sections to the first metal plate on a main surface of the first metal plate, and a second brazing sheet in which a second brazing material layer is formed for joining the several valley sections to the second metal plate on a main surface of the second metal plate; Applying a release agent to the first brazing sheet by layering a first release agent on a main surface of the first brazing material layer in regions that are different from the regions where the several mountain sections are to be joined; and Applying a release agent to the second brazing sheet by applying a second release agent to a main surface of the second brazing material layer in regions that are different from the regions where the multiple valley sections are to be joined, wherein: The preparation of the layered plate comprises layering the first brazing sheet with release agent, the third metal plate formed in the form of a flat plate, and the second brazing sheet, such that the first metal plate, the first brazing material layer, the third metal plate formed in the form of a flat plate, the second brazing material layer, and the second metal plate are layered in that order, and the joining of the first metal plate and the third metal plate and the joining of the second metal plate and the third metal plate formed in the form of a flat plate, including heating the layered plate, brazing the first metal plate and the third metal plate formed in the form of a flat plate and brazing the second metal plate and the third metal plate formed in the form of a flat plate.

[0030] In the seventh step, the first metal plate and the several mountain sections are joined by brazing. The second metal plate and the several valley sections are also joined by brazing. Consequently, the method of manufacturing a heat exchanger according to the seventh step allows for simpler heat exchanger production than in a housing where brazing is not used.

[0031] <8> A heat exchanger according to an eighth aspect of the present disclosure is a heat exchanger comprising a first metal plate with at least one first through-hole, a second metal plate with at least one second through-hole, and a zigzag metal plate arranged between the first metal plate and the second metal plate, wherein the zigzag metal plate is formed by a third metal plate in the form of a flat plate, which is formed in a zigzag shape, wherein: The zigzag metal plate has several mountain sections joined with the first metal plate, and several valley sections joined with the second metal plate. first flow paths, connected to at least one of the first through-holes, are formed between the first metal plate and the zigzag metal plate, and second flow paths, connected to at least one of the second through-holes, are formed between the second metal plate and the zigzag metal plate, The zigzag metal plate deforms more easily than the first and second metal plates because it has a lower stiffness than both the first and second metal plates. The numerous mountain sections are joined with the first metal plate in a straight or curved line; and The numerous valley sections are joined in a straight or curved line with the second metal plate.

[0032] In the eighth aspect, the zigzag metal plate deforms more easily than the first or second metal plate. Specifically, the third metal plate deforms more easily than the first and second metal plates. The ninth aspect heat exchanger is expediently manufactured using the same method as the first aspect heat exchanger. Therefore, the two main surfaces of the ninth aspect heat exchanger are flat. Consequently, the ninth aspect heat exchanger can efficiently regulate the heat transfer to the heat exchange targets.

[0033] <9> A heat exchanger of a ninth aspect of the present disclosure is the heat exchanger according to <8> , where A main surface of the first metal plate and a main surface of the second metal plate are each flat.

[0034] From the ninth perspective, it is easier for the main surface area of ​​the first metal plate and the main surface area of ​​the second metal plate to directly contact the heat exchange targets than in a housing where the main surface area of ​​the first metal plate and the main surface area of ​​the second metal plate are not planar. Consequently, the heat exchanger of the ninth perspective can more efficiently transfer heat to the heat exchange targets.

[0035] <101> A heat exchanger of a tenth aspect of the present disclosure is the heat exchanger according to <9> , where The thickness of the heat exchanger is less than or equal to 10 mm.

[0036] The heat exchanger of the tenth point is expediently used as a cooler for cooling power storage modules contained in the apparatus of the twelfth point described below.

[0037] According to the present disclosure, a method for manufacturing a heat exchanger, with which a heat exchanger whose two main surfaces are flat can be manufactured, as well as a heat exchanger, is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Exemplary embodiments of the present invention are described in more detail with reference to the following figures, wherein: Fig. Figure 1 is a cross-sectional view of a heat exchanger belonging to a first embodiment of the present disclosure; Fig. Figure 2 is a cross-sectional view along line C2-C2 of the heat exchanger. Fig. 1; Fig. Figure 3 is a cross-sectional view along line C3-C3 of the heat exchanger of Fig. 1; Fig. 4 is a drawing illustrating a method for manufacturing a heat exchanger according to the first embodiment of the present disclosure; Fig. 5 is a drawing illustrating the method for manufacturing a heat exchanger according to the first embodiment of the present disclosure; Fig. Figure 6 is a cross-sectional view of a power storage device package in connection with the first embodiment of the present disclosure; Fig. Figure 7 is a cross-sectional view of a power storage module in the first embodiment of the present disclosure; Fig. Figure 8 is a cross-sectional view of a heat exchanger belonging to a second embodiment of the present disclosure; and Fig. Figure 9 is a cross-sectional view of a conventional heat exchanger. DETAILED DESCRIPTION

[0039] In this disclosure, numerical ranges expressed by the use of “~” signify ranges in which the numerical values ​​listed before and after the “~” are included as minimum and maximum values, respectively. In numerical ranges expressed stepwise in this disclosure, the upper limit or lower limit listed in one numerical range may be replaced by the upper limit or lower limit of another numerical range expressed stepwise. In this disclosure, combinations of two or more advantageous aspects are more advantageous aspects.In the present disclosure, the term “step” does not only refer to an independent step, but also includes steps that achieve the intended purpose of that step within a housing in which that step cannot be clearly distinguished from any other step.

[0040] Exemplary embodiments of a method for manufacturing a heat exchanger, a heat exchanger, a power storage device, and a power storage device package of the present disclosure are described below with reference to the drawings. In the drawings, identical or equivalent parts are identified by the same reference numerals, and their descriptions are not repeated. (1) First embodiment

[0041] A method for manufacturing a heat exchanger according to a first embodiment of the present disclosure is a method for manufacturing a heat exchanger 1A. (1.1) Heat exchanger

[0042] As in Fig. 1 and Fig. As shown in Figure 2, the heat exchanger 1A has a first metal plate 11, a second metal plate 12, a zigzag metal plate 13A, a first brazing material layer 14 (see Figure 2). Fig. 2) and a second brazing material layer 15 (see Fig. 2) The first brazing material layer 14 is applied to the main surface TS11 of the first metal plate 11. The second brazing material layer 15 is applied to the main surface TS12 of the second metal plate 12. The zigzag metal plate 13A is positioned between the first metal plate 11 and the second metal plate 12. The zigzag metal plate 13A is brazed to the first metal plate 11 and the second metal plate 12 through the first brazing material layer 14 and the second brazing material layer 15. The heat exchanger 1A is a hexahedral object.

[0043] In the following, a side in the thickness direction of heat exchanger 1A is defined as the positive Z-axis direction, and the opposite side as the negative Z-axis direction. A side in the direction in which a side of the main surface of heat exchanger 1A extends is defined as the positive X-axis direction, and the opposite side is defined as the negative X-axis direction. (The X-axis direction is an example of the first direction.) A side of the main surface of heat exchanger 1A that is orthogonal to the X-axis is defined as the positive Y-axis direction, and the opposite side is defined as the negative Y-axis direction. (The Y-axis direction is an example of the second direction.) The X-axis, Y-axis, and Z-axis are orthogonal to each other. Note that these directions do not restrict the directions at the time of use of heat exchanger 1A.

[0044] The thickness L1 (length L1 in the direction of the Z-axis) (see Fig. 2) The diameter of heat exchanger 1A is less than or equal to 10 mm. The thickness L1 can be 4 mm to 5 mm. The length L2 in the X-axis direction of heat exchanger 1A and the length L3 in the Y-axis direction of heat exchanger 1A can be, for example, 1000 mm to 2000 mm. The lengths L2 and L3 can be the same or different.

[0045] The heat exchanger 1A is preferably used as a cooler that cools a power storage module of a power storage device package, which will be described later. (1.1.1) First metal plate

[0046] The first metal plate 11 is a flat, plate-shaped object. The main surface TS11 (an example of the main surface) of the first metal plate 11 is planar. The first metal plate 11 has two first through holes TH1. The thickness L4 (see Fig. 2) The first metal plate 11 is greater than or equal to 1.00 mm. The thickness L4 can be 1.00 mm to 3.00 mm and can be 1.6 mm. The first metal plate 11 contains an aluminum alloy of the 6000 series and can be an aluminum alloy of the 6000 series. Examples of aluminum alloys of the 6000 series are aluminum alloys with alloy numbers 6101, 6061, 6082, and the like. (1.1.2) Second metal plate

[0047] The second metal plate 12 is a flat, plate-shaped object. The main surface TS12 (an example of the main surface) of the second metal plate 12 is planar. The second metal plate 12 has two secondary through holes TH2. The thickness L5 (see Fig. 2) The second metal plate 12 is greater than or equal to 1.00 mm. The thickness L5 can be 1.00 mm to 3.00 mm and can be 1.6 mm. The second metal plate 12 contains an aluminum alloy of the 6000 series and can be of the same type. The second metal plate 12 can be identical to or different from the first metal plate 11. (1.1.3) Zigzag metal plate

[0048] The zigzag metal plate 13A is formed by a third metal plate (not shown) that has a zigzag shape. The third metal plate is a flat, plate-like object. The third metal plate and the zigzag metal plate 13A are more easily deformed than the first metal plate 11 and the second metal plate 12. In particular, the third metal plate is less than 1.00 mm thick and can be between 0.6 mm and 0.1 mm thick, and 0.3 mm thick. The third metal plate contains, and can be, 1000 series aluminum. Examples of 1000 series aluminum include pure aluminum with alloy numbers 1085, 1080, 1070, 1060, 1050, 1050A, and the like.

[0049] As in Fig. As shown in Figure 2, the zigzag metal plate 13A has several mountain sections M13, which are connected to the first metal plate 11 by the first brazing material layer 14, and several valley sections V13, which are connected to the second metal plate 12 by the second brazing material layer 15.

[0050] The multiple mountain sections M13 comprise several straight mountain sections M13A (an example of the first mountain sections) and a frame-shaped mountain section M13B, which is formed along the circumferential edge of the first metal plate 11. The straight mountain sections M13A extend in the direction of the Y-axis. The multiple straight mountain sections M13A are each formed such that they are spaced apart at a first distance L6 along the X-axis direction. The frame-shaped mountain section M13B surrounds the multiple straight mountain sections M13A.

[0051] The multiple valley sections V13 comprise several straight valley sections V13A (an example of the first valley sections) and a frame-shaped valley section V13B, which is formed along the circumferential edge of the first metal plate 11. The straight valley sections V13A extend in the direction of the Y-axis. The multiple straight valley sections V13A are each configured such that they are spaced apart at a second distance L7 along the X-axis direction. The frame-shaped valley section V13B surrounds the multiple straight valley sections V13A. In the first embodiment, the second distance L7 is the same as the first distance L6.

[0052] The frame-shaped mountain section M13B surrounds the frame-shaped valley section V13B. A distance L8 exists between the frame-shaped mountain section M13B and the frame-shaped valley section V13B in both the X-axis and Y-axis directions (see figure). Fig. 3) formed. In the direction of the X-axis, the distance L8 (see Fig. 2) formed between the straight mountain section M13A and the adjacent straight mountain section M13A. The length of the gap L8 is a length that is half the length of the first gap L6 or half the length of the second gap L7.

[0053] First flow paths R1, connected to the first through-holes TH1, are formed between the first metal plate 11 and the zigzag metal plate 13A. Second flow paths R2, connected to the second through-holes TH2, are formed between the second metal plate 12 and the zigzag metal plate 13A. In the first embodiment, third through-holes connecting the first flow paths R1 and the second flow paths R2 are not formed in the zigzag metal plate 13A. The first flow paths R1 and the second flow paths R2 are independent of each other. (1.1.4) First brazing material layer

[0054] The material of the first brazing layer 14 is not particularly limited, provided that it can braze the several mountain sections M13 of the zigzag metal plate 13A to the first metal plate 11, and can be a known brazing material. The thickness of the first brazing layer 14 can, for example, be 10% of the total thickness of the first metal plate 11 and the first brazing layer 14. (1.1.5) Second brazing material layer

[0055] The material of the second brazing layer 15 is not particularly limited, provided that it can braze the multiple valley sections V13 of the zigzag metal plate 13A to the second metal plate 12, and can be a known brazing material. The thickness of the second brazing layer 15 can, for example, be 10% of the total thickness of the second metal plate 12 and the second brazing layer 15. (1.1.6) Operation

[0056] When a cooling medium is supplied to one of the two first through-holes TH1 of heat exchanger 1A, the cooling medium flows through the first flow paths R1 and is discharged from the other of the two first through-holes TH1. If a cooling medium is supplied to one of the two second through-holes TH2, the cooling medium flows through the second flow paths R2 and is discharged from the other of the two second through-holes TH2. Since the cooling medium circulates through the interior of heat exchanger 1A in this way, heat exchanger 1A can cool heat exchange targets that are brought into thermal contact with the main surface TS11 of the first metal plate 11 or the main surface TS12 of the second metal plate 12. (1.2) Methods for manufacturing heat exchangers

[0057] The method for manufacturing the heat exchanger of the first embodiment comprises a finishing step, a step for applying a first release agent, a step for applying a second release agent, a layering step, a joining step, and a pressure feeding step. The order in which the first release agent step and the second release agent step are applied is not particularly restricted, provided that these steps are performed after the finishing step and before the layering step. The layering step, the joining step, and the pressure feeding step are performed in this order, after the first release agent step and the second release agent step, respectively.

[0058] In the following, the first metal plate 11 and the first brazing material layer 14 are referred to collectively as the "first brazing sheet 110". The second metal plate 12 and the second brazing material layer 15 are referred to collectively as the "second brazing sheet 120". (1.2.1) Step of preparing

[0059] During the finishing process, the first brazing sheet 110 and the second brazing sheet 120 are finished. The method for finishing the first brazing sheet 110 and the second brazing sheet 120 is not particularly limited, and it is sufficient if this method is a known method. (1.2.2) Step of applying a first release agent

[0060] The first step in applying a release agent, as in Fig. As shown in Figure 4, a first release agent is applied to the region RE1, which differs from the regions RM13 where the several mountain sections M13 are joined, on the main surface S14 of the first brazing material layer 14 of the first brazing sheet 110. This renders a first brazing sheet 1100 with release agent.

[0061] The first brazing sheet 1100 with release agent comprises the first brazing sheet 110 and an applied layer 16 of the first release agent. Regions RM13 include region RM13A, in which the several straight mountain sections M13A are joined, and region RM13B, in which the frame-shaped mountain section M13B is joined.

[0062] The method for applying the first release agent is not particularly restricted, and a first coating method and the like are examples of this. In the first coating method, masking tape is applied only to regions RM13A of the first brazing material layer 14, where the multiple mountain sections M13 are to be joined, and the first release agent is layered onto the region (i.e., region RE1) of the first brazing material layer 14 where the masking tape is not applied, and the masking tape is then removed from the first brazing material layer 14. The material of the first release agent is not particularly restricted, provided that it is a material that prevents brazing of the first brazing material layer 14 and the third metal plate, and may be a known release agent (e.g., boron nitride). (1.2.3) Step of applying a second release agent application

[0063] In the second step of applying a release agent, as in Fig. As shown in Figure 5, a second release agent is applied to region RE2 of the main surface S15 of the second brazing material layer 15, which differs from regions RV13 where the several valley sections V13 are joined. This applies a release agent to a second brazing sheet 1200.

[0064] The second brazing sheet 1200 with release agent comprises the second brazing sheet 120 and an applied layer 17 of the second release agent. Regions RV13 include region RV13A, in which the several straight valley sections V13A are joined, and region RV13B, in which the frame-shaped valley section V13B is joined.

[0065] The method for applying the second release agent is not particularly limited, and a second coating method and the like are examples of this. In the second coating method, masking tape is applied only to regions RV13A, where the multiple valley sections V13 are to be joined, of the second brazing material layer 15, and the second release agent is applied to the region (i.e., region RE2) of the second brazing material layer 15 where the masking tape is not applied, and the masking tape is removed from the second brazing material layer 15. The material of the second release agent is not particularly limited, provided that it is a material that prevents brazing of the second brazing material layer 15 and the third metal plate, and may be a known release agent. The second release agent may be identical to or different from the first release agent. (1.2.4) Layering step

[0066] In the layering step, the first brazing sheet 1100 with release agent, the third metal plate, and the second brazing sheet 1200 with release agent are layered such that the first metal plate 11, the first brazing material layer 14, the third metal plate, the second brazing material layer 15, and the second metal plate 12 are layered in this order, and a layered plate is provided. The layering method is not particularly restricted; it is sufficient if it is a known method. The size of the third metal plate can be the same as or different from that of the first metal plate 11 and the second metal plate 12. (1.2.5) Joining step

[0067] In the joining step, the layered plate is heated, the first metal plate 11 and the third metal plate are joined together, and the second metal plate 12 and the third metal plate are joined together. Specifically, in the first embodiment, in region RM13B, where the coated layer 16 of the first release agent is not formed, the first metal plate 11 and the third metal plate are brazed. In region RE1, where the coated layer 16 of the first release agent is formed, the first metal plate 11 and the third metal plate are not brazed. In region RV13B, where the coated layer 17 of the second release agent is not formed, the second metal plate 12 and the third metal plate are brazed. In region RE2, where the coated layer 17 of the second release agent is formed, the second metal plate 12 and the third metal plate are not brazed.The method for heating the layered plate is not particularly restricted, and it is sufficient if it is a known method. (1.2.6) Step of feeding under pressure

[0068] In the pressurized feeding step, a pressurized fluid is introduced into the first through-hole TH1 and the second through-hole TH2 of the layered plate, and the third metal plate is forced to widen. The reason the third metal plate is forced and widened by the fluid is that the third metal plate and the zigzag metal plate 13A deform more easily than the first metal plate 11 and the second metal plate 12. The first metal plate 11 and the second metal plate 12 can easily retain their pre-pressurized shape after the feeding step. The pressurized feeding step creates the first flow paths R1 and the second flow paths R2. The fluid is not particularly limited, provided it can widen the third metal plate; examples include gases, liquids, and the like.The fluid can be a cooling medium. Examples of cooling media include liquids, gases, and similar substances. Cooling liquids are not particularly limited, provided they are liquids generally used for cooling, such as water, oil, aqueous glycol-based solutions, air conditioning refrigerants, non-conductive liquids, phase-change fluids, etc. Examples of cooling gases include air, nitrogen gas, and the like. The temperature of the cooling medium is adjusted according to the nature of the heat exchange objective and similar factors. For the purpose of cleaning the first flow paths R1 and the second flow paths R2 after the pressurized supply step, the fluid is preferably a gas.The method for supplying the fluid under pressure is selected according to the type of fluid and the like, and it is sufficient if the method is a known method. (1.3) Power storage device package

[0069] As in Fig. Figure 6 shows that a power storage device package 20 of the first embodiment of the present disclosure has a power storage device 30 and a lower housing 60. The lower housing 60 contains the energy storage device 30. (1.3.1) Energy storage device

[0070] The power storage device package 20 contains the power storage device 30.

[0071] Device 30 is used as a battery for various vehicle types, such as forklifts, hybrid vehicles, electric vehicles, etc. As in Fig. As shown in Figure 6, the device 30 comprises a module stack 31 and a restraint element 32. The restraint element 32 exerts a restraint load on the module stack 31 in the stacking direction of the module stack 31.

[0072] The module stack 31 comprises several power storage modules 33 and several heat exchangers 1A, which are stacked. The power storage module 33 is, for example, a bipolar battery. The power storage module 33 is, for example, a secondary battery such as a nickel-hydrogen secondary battery, a lithium-ion secondary battery, or the like. The module stack 31 is rectangular when viewed in the stacking direction (i.e., in the Z-direction).

[0073] The power storage modules 33, arranged side by side in the stacking direction, are electrically connected to each other via the heat exchangers 1A. The heat exchangers 1A are located between the power storage modules 33 adjacent in the stacking direction and on the outer surfaces of the power storage modules 33, which are positioned at the ends of the stack. A positive electrode terminal 34 is connected to one of the heat exchangers 1A, which is located on the outer surface of the power storage module 33 at one end of the stack. A terminal 35 for a negative electrode is connected to the other heat exchanger 1A, which is located on the outer surface of the power storage module 33 at one end of the stack. The positive electrode terminal 34 and the negative electrode terminal 35 are, for example, extended from the edge sections of the heat exchangers 1A in a direction that intersects the stacking direction.The device 30 is charged / discharged via the positive electrode connection 34 and the negative electrode connection 35.

[0074] The heat exchangers 1A function as connecting elements that electrically connect the power storage modules 33 and as heat-emitting plates that dissipate the heat generated at the power storage modules 33.

[0075] The restraint component 32 consists of a pair of end plates 36 that enclose the module stack 31 in the stacking direction, as well as fastening bolts 37 and nuts 38 that connect the end plates 36 to each other. connect. Electrically insulating films F are provided on the surfaces of the end plates 36, which are located on the sides of the module stack 31. The films F electrically insulate the end plates 36 and the heat exchangers 1A. (1.3.1.1) Power storage module

[0076] As in Fig. As shown in Figure 7, the power storage module 33 has an electrode stack 41 and a sealing body 42 made of resin, which seals the electrode stack 41. The power storage module 33 is, for example, designed in the form of a rectangular parallelepiped.

[0077] The electrode stack 41 comprises several electrodes stacked along the stacking direction over separators 43 and collectors (metal plates 50A, 50B) arranged at the stack ends of the electrode stack 41. The several electrodes include a negative electrode final end electrode 48, a positive electrode final end electrode 49, and several bipolar electrodes 44 stacked between the negative electrode final end electrode 48 and the positive electrode final end electrode 49. The stack of several bipolar electrodes 44 is positioned between the negative electrode final end electrode 48 and the positive electrode final end electrode 49.

[0078] The bipolar electrode 44 has a metal plate 45, which serves as a collector, a positive electrode 46, and a negative electrode 47. The metal plate 45 has a first surface 45a and a second surface 45b, which is located on the side opposite the first surface 45a. The positive electrode 46 is located on the first surface 45a, and the negative electrode 47 is located on the second surface 45b. The positive electrode 46 is an active material layer for the positive electrode, formed by an active material for the positive electrode applied to the metal plate 45. The negative electrode 47 is a negative electrode active material layer, formed by a negative electrode active material applied to the metal plate 45.On the electrode stack 41, the positive electrode 46 of one bipolar electrode 44 faces the negative electrode 47 of another bipolar electrode 44, which adjoins it on one side in the stack direction, with the separator 43 located between them.

[0079] The negative electrode final end electrode 48 comprises the metal plate 45 and the negative electrode 47, which is provided on the second surface 45b of the metal plate 45. The negative electrode final end electrode 48 is arranged at one end in the stacking direction such that the second surface 45b faces the middle side in the stacking direction of the electrode stack 41. The metal plate 50A is also stacked on the first surface 45a of the metal plate 45 of the negative electrode final end electrode 48, and the negative electrode final end electrode 48 is electrically connected via this metal plate 50A to the heat exchanger 1A adjacent to the power storage module 33. The negative electrode 47, which is provided on the second surface 45b of the metal plate 45 of the negative electrode final end electrode 48, faces the positive electrode 46 of the bipolar electrode 44, which is located at one end in the stacking direction, via the separator 43.

[0080] The positive electrode final end electrode 49 comprises the metal plate 45 and the positive electrode 46, which is provided on the first surface 45a of the metal plate 45. The positive electrode final end electrode 49 is arranged at the other end in the stacking direction such that the first surface 45a of the middle side in the stacking direction faces the electrode stack 41.

[0081] On the second surface 45b of the metal plate 45 of the positive electrode final end electrode 49, the metal plate 50B is stacked, and the positive electrode final end electrode 49 is electrically connected via this metal plate 50B to the other heat exchanger 1A, which is adjacent to the power storage module 33. The positive electrode 46, which is provided on the first surface 45a of the metal plate 45 of the positive electrode final end electrode 49, faces the negative electrode 47 of the bipolar electrode 44, which is located at the other end in the stacking direction, via the separator 43.

[0082] The material of the metal plate 45 is a metal (e.g., Al, SUS, Ni, Cu, or the like). Each of the metal plates 45 is a metal plate contained within the electrode stack 41. Examples of the active material of the positive electrode 46 that structures it are oxide-active materials. Examples of oxide active materials are layered rock salt-type active materials such as LiCoO2, LiMnO2, LiNiO2, LiVO2, and LINi. 1 / 3 Co 1 / 3 Mn 1 / 3 O2 and the like, spinel-type active materials such as LiMn2O4, Li(Ni 0.5 Mn 1.5 )O4 and the like, and olivine-type active materials such as LiFePO4, LiMnPO4, LiNiPO4, LiCuPO4 and the like. Examples of the active material of the negative electrode structuring the negative electrode 47 are active carbon materials, active oxide materials, and active metal materials. The electrode stack 41 consists of several metal plates 45, 50A, 50B arranged one above the other.

[0083] The separator 43 is an element for preventing a short circuit between the metal plates 45 and is, for example, a sheet-shaped object. Examples of separators 43 include porous films made of polyolefin resins such as polyethylene (PE), polypropylene (PP), and the like; woven or non-woven fabrics made of polypropylene, methylcellulose, or the like; and similar materials. The separators 43 may be reinforced with vinylidene fluoride resin compounds. It should be noted that the separators 43 can be not only sheet-shaped but also bag-shaped.

[0084] The metal plates 50A and 50B are elements that are essentially identical to the metal plates 45. The material of the metal plates 50A and 50B is a metal (e.g., Al, SUS, Ni, Cu, or the like). The metal plates 50A and 50B are each a metal plate contained in the electrode stack 41. The metal plates 50A and 50B form uncoated electrodes in which neither a positive electrode active material layer nor a negative electrode active material layer is formed on a first surface 50a and a second surface 50b. The metal plates 50A and 50B are, in fact, uncoated electrodes in which no active material layer is provided on either surface.

[0085] Due to the presence of metal plate 50A, the negative electrode final end electrode 48 is located between metal plate 50A and the bipolar electrode 44 in the stacking direction. The second surface 50b of metal plate 50A and the first surface 45a of metal plate 45 of the negative electrode final end electrode 48 are electrically connected by direct contact, without anything interposed. Due to the presence of metal plate 50B, the positive electrode final end electrode 49 is located in the stacking direction between metal plate 50B and the bipolar electrode 44. The first surface 50a of metal plate 50B and the second surface 45b of metal plate 45 of the positive electrode final end electrode 49 are electrically connected by direct contact, without anything interposed.

[0086] At the electrode stack 41, the central region of the electrode stack 41 (the region in which the active material layers are arranged on the bipolar electrodes 44, the negative electrode final end electrode 48, and the positive electrode final end electrode 49) bulges outward in the stack direction compared to the region at its periphery. Therefore, the metal plates 50A and 50B are bent in directions in which the central regions of the metal plates 50A and 50B move away from each other.

[0087] The electrode stack 41 has exposed electrode sections 50d, which are exposed at one end and the other of the sealing body 42 in the stacking direction (Z-axis direction). The exposed electrode sections 50d are structured by the central regions of the negative electrode final end electrode 48 and the positive electrode final end electrode 49, which are exposed at their central regions of the sealing body 42. Between the power storage modules 33 adjacent in the stacking direction, the heat exchangers 1A are arranged between the exposed electrode sections 50d, facing each other so that they contact the exposed electrode sections 50d.

[0088] The sealing body 42 is formed in the overall shape of a rectangular tube, for example, filled with an insulating resin. The sealing body 42 is designed to surround the side surfaces 41a of the electrode stack 41. The sealing body 42 seals internal spaces V provided within the electrode stack 41.

[0089] The sealing body 42 has several frame-shaped first sealing sections 51 (resin sections) and a second sealing section 52. The first sealing sections 51 are each located at the edge sections of the metal plates contained in the electrode stack 41 (i.e., at the edge sections 45c of the metal plates 45 and the edge sections 50c of the metal plates 50A, 50B). The second sealing section 52 surrounds the several frame-shaped first sealing sections 51 (resin sections) and the first sealing sections 51 along the side surfaces 41a from the outside and is connected to the respective first sealing sections 51. The first sealing sections 51 and the second sealing section 52 are, for example, insulating resins, and examples of structural materials of the resins are polypropylene (PP), polyphenylene sulfide (PPS), modified polyphenylene ether (modified PPE), and the like.

[0090] The first sealing sections 51 extend continuously over the entire circumference of the edge sections 45c of the metal plates 45 and the edge sections 50c of the metal plates 50A, 50B and are designed as rectangular frames when viewed in the stacking direction. The first sealing sections 51 and the metal plates 45, and the first sealing sections 51 and the metal plates 50A, 50B, are airtightly connected to one another. Viewed from the stacking direction, the first sealing sections 51 extend further to the outer surfaces than the edge sections 45c of the metal plates 45 and the edge sections 50c of the metal plates 50A, 50B. The first sealing sections 51 comprise outer side sections 51a, which project further towards the outer sides than the edges of the metal plates 45 and the metal plates 50A, 50B, and inner side sections 51b, which are arranged further towards the inner sides than the edges of the metal plates 45 and the metal plates 50A, 50B.Separated layers 53 are formed at the distal end sections (the outer edge sections) of the outer side sections 51a of the first sealing sections 51.

[0091] The multiple first sealing sections 51 comprise multiple first sealing sections 51A provided at the bipolar electrodes 44 and the positive electrode final end electrode 49, a first sealing section 51B provided at the negative electrode final end electrode 48, a first sealing section 51C provided at the metal plate 50A, and first sealing sections 51D, 51E provided at the metal plate 50B.

[0092] The first sealing sections 51A are connected to the first surfaces 45a of the metal plates 45 of the bipolar electrodes 44 and the positive electrode final-end electrode 49. The inner side sections 51b of the first sealing sections 51A are arranged between the edge sections 45c of the metal plates 45, which abut each other in the stacking direction. The overlapping regions of the edge sections 45c on the first surfaces 45a of the metal plates 45 and the first sealing sections 51A are the joined regions of the metal plates 45 and the first sealing sections 51A.

[0093] In the present embodiment, the first sealing section 51A is designed as a two-layer structure, since a single film is folded into two parts. The outer edge sections of the first sealing sections 51A, which are embedded in the second sealing section 52, are the folded sections (the bent sections) of the films. The film of the first layer, which structures the first sealing section 51A, is bonded to the first surface 45a. The inner edge of the film of the second layer is positioned further outwards than the inner edge of the film of the first layer and forms a stepped section on which the separator 43 is arranged. The inner edge of the film of the second layer is positioned further inwards than the edge of the metal plate 45.

[0094] The first sealing section 51B is connected to the first surface 45a of the metal plate 45 of the negative electrode final end electrode 48. The inner side section 51b of the first sealing section 51B is positioned between the edge section 45c of the metal plate 45 of the negative electrode final end electrode 48 and the edge section 50c of the metal plate 50A, which lie side by side in the stacking direction. The overlapping region of the edge section 45c on the first surface 45a of the metal plate 45 and the inner side section 51b of the first sealing section 51B is the joined region of the metal plate 45 and the first sealing section 51B. The first sealing section 51B is also connected to the second surface 50b of the metal plate 50A. The overlapping region of the edge section 50c on the second surface 50b of the metal plate 50A and the first sealing section 51B is the joined region of the metal plate 50A and the first sealing section 51B.The first sealing section 51B is also connected to the edge section 50c on the second surface 50b of the metal plate 50A.

[0095] The first sealing section 51C is connected to the first surface 50a (the outer surface) of the metal plate 50A. The overlapping region of the edge section 50c at the first surface 50a of the metal plate 50A and of the first sealing section 51C is the joined region of the metal plate 50A and the first sealing section 51C. The first surface 50a of the metal plate 50A has the exposed electrode section 50d (hereinafter also referred to as "exposed surface 50d"), which is exposed by the first sealing section 51C. The heat exchanger 1A is positioned so that it contacts the exposed surface 50d.

[0096] The outer edges of the first sealing sections 51B, 51C, which are embedded in the second sealing section 52, are continuous. The first sealing sections 51B, 51C are formed by a single film that is folded in two, so that the edge section 50c of the metal plate 50A is sandwiched between them. The outer edge sections of the first sealing sections 51B, 51C are the folded portion of the film. The film that structures the first sealing sections 51B, 51C is connected to the edge section 50c on both the first surface 50a and the second surface 50b of the metal plate 50A.

[0097] The first sealing section 51D is connected to the first surface 50a of the metal plate 50B. The inner side section 51b of the first sealing section 51D is positioned between the edge section 45c of the metal plate 45 of the positive electrode final-end electrode 49 and the edge section 50c of the metal plate 50B, which lie side by side in the stacking direction. The overlapping region of the edge section 50c on the first surface 50a of the metal plate 50B and of the first sealing section 51D is the joined region of the metal plate 50B and the first sealing section 51D.

[0098] The first sealing section 51E is located at the edge section 50c on the second surface 50b (the outer surface) of the metal plate 50B. The first sealing section 51E is not connected to the metal plate 50B. The second surface 50b of the metal plate 50B has the exposed surface 50d, which is exposed by the first sealing section 51E. The heat exchanger 1A is positioned so that it contacts the exposed surface 50d.

[0099] The outer edge sections of the first sealing sections 51D, 51E, which are embedded in the second sealing section 52, are continuous. The first sealing sections 51D, 51E are formed by a single film that is folded into two parts, so that the edge section 50c of the metal plate 50B is sandwiched between them. The outer edge sections of the first sealing sections 51D, 51E are the folded portion of the film. The film that structures the first sealing sections 51D, 51E is joined to the edge section 50c on the first surface 50a of the metal plate 50B.

[0100] The multiple interior spaces V are provided within the electrode stack 41. The individual interior spaces V are located between the adjacent metal plates. Each interior space V is a space that is sealed airtight and liquid-tight between the metal plates adjacent in the stack direction by these metal plates and the sealing body 42. An electrolytic fluid (not shown) is, for example, housed in the interior spaces V. The electrolytic fluid contains, for example, a non-aqueous solvent and a carrier salt. Examples of the non-aqueous solvent are organic solvents such as carbonates, ethers, esters, nitriles, sulfones, lactones, and the like. Examples of the carrier salt are lithium salts such as LiPF6 and the like. The electrolytic fluid penetrates the separators 43, the positive electrodes 46, and the negative electrodes 47. (1.3.2) Lower casing

[0101] The power storage device package 20 has the lower housing 60. The lower housing 60 contains the energy storage device 30. The shape of the lower housing 60 is not particularly restricted, provided it is a shape that accommodates the power storage module 30, and it is sufficient that the shape is a known shape. The material of the lower housing 60 can be metal or plastic. The power storage device package 20 can be attached to the lower housing 60. The method for attaching the power storage device package 20 is selected according to the material of the lower housing 60 and the like, and examples include methods using fasteners, welding, anchoring, laying, and the like. Examples of fasteners are bolts, nuts, screws, rivets, pins, and the like. Examples of welding are metal welding and brazing. (1.3.3) Cooling device

[0102] The power storage device package 20 can be equipped with a device (not shown) that supplies a cooling medium to the heat exchangers 1A. The cooling device can be a known device. (1.3.4) upper case

[0103] The power storage device package 20 may have an upper housing (not shown) that covers the device 30. The shape of the upper housing is not particularly limited, provided it is a shape that covers the device 30, and it is sufficient if it is a known shape. The material of the upper housing may be metal or plastic. The upper housing is attached to the lower housing 60. The method for attaching the upper housing is not particularly limited, and examples of such methods are the same as those described as methods for attaching the power storage device package 20. (1.4) Operation / Effect

[0104] As with reference to Fig. 1 to Fig. As described in Figure 7, the method for manufacturing the heat exchanger of the first embodiment is a method for manufacturing heat exchanger 1A. Heat exchanger 1A comprises the first metal plate 11, the second metal plate 12, and the zigzag metal plate 13A. The third metal plate deforms more easily than the first metal plate 11 and the second metal plate 12. The method for manufacturing the heat exchanger includes a layering step and an joining step. As a result, when fluid under pressure is supplied to the first through-hole TH1 or the second through-hole TH2 of the layered plate, the regions of the third metal plate that belong to the regions structuring the first flow paths R1 or the second flow paths R2 are selectively compressed and widened. At this point, it is difficult for the first metal plate 11 and the second metal plate 12 to deform.Using the method for manufacturing the heat exchanger of the first embodiment, the heat exchanger 1A can be manufactured in which the main surface TS11 and the main surface TS12 are flat.

[0105] Furthermore, the method for manufacturing the heat exchanger of the first embodiment can produce the heat exchanger, in which the main surface TS11 and the main surface TS12 are flat, at a lower cost than in a housing with a metal mold for the zigzag metal plate 13A.

[0106] As with reference to Fig. 1 to Fig. As described in section 7, the method for manufacturing the heat exchanger of the first embodiment includes a pressurized feeding step. This forms the first flow paths R1 between the first metal plate 11 and the zigzag metal plate 13A, and the second flow paths R2 between the second metal plate 12 and the zigzag metal plate 13A. Consequently, the method for manufacturing the heat exchanger of the first embodiment can produce the heat exchanger 1A in which the main surface TS11 and the main surface TS12 are flat.

[0107] As above with reference to Fig. 1 to Fig. As described in Figure 7, the zigzag metal plate 13A in the first embodiment does not have third through-holes connecting the first flow paths R1 and the second flow paths R2. The multiple mountain sections M13 comprise the multiple straight mountain sections M13A (an example of the first mountain sections). The multiple valley sections V13 comprise the multiple straight valley sections V13A (an example of the first valley sections). This makes the first flow paths R1 and the second flow paths R2 independent of each other. When a fluid is supplied under pressure from the first through-hole TH1 of the layered plate, it is easier to ensure a uniform distribution of the magnitude of the pressure exerted on the first metal plate 11 than in a case where the multiple mountain sections M13 do not include the multiple straight mountain sections M13A, which are designed to be spaced at the first distance L6.When a fluid is supplied under pressure from the second through-hole TH2 of the layered plate, it is easier to achieve a uniform distribution of the magnitude of the pressure exerted on the second metal plate 12 than in a housing where the multiple valley sections V13 do not include the multiple straight valley sections V13A, which are designed to be spaced at a second distance L7. Consequently, the method for manufacturing the heat exchanger of the first embodiment can produce the heat exchanger 1A in which the main surface TS11 and the main surface TS12 are flat.

[0108] As with reference to Fig. 1 to Fig. As described in Figure 7, in the first embodiment the straight mountain sections M13A and the straight valley sections V13A extend along the Y-axis direction (an example of the second direction). The straight mountain sections M13A and the straight valley sections V13A alternate along the X-axis direction (an example of the first direction).

[0109] Therefore, when a fluid is supplied under pressure from the first through-hole TH1 of the layered plate, it is even easier to distribute the magnitude of the pressure exerted on the first metal plate 11 uniformly. Similarly, when a fluid is supplied under pressure from the second through-hole TH2 of the layered plate, it is even easier to ensure that the pressure exerted on the second metal plate 12 is uniform. Consequently, the method for manufacturing the heat exchanger of the first embodiment can produce the heat exchanger 1A in which the main surface TS11 and the main surface TS12 are flat.

[0110] As above with reference to Fig. 1 to Fig. As described in Figure 7, in the first embodiment both the first metal plate 11 and the second metal plate 12 contain an aluminum alloy of the 6000 series. The third metal plate contains an aluminum alloy of the 1000 series.

[0111] The third metal plate is easier to deform than the first metal plate 11 and the second metal plate 12. Consequently, the method for manufacturing the heat exchanger of the first embodiment can produce the heat exchanger 1A in which the main surface TS11 and the main surface TS12 are flat.

[0112] As above with reference to Fig. 1 to Fig. As described in section 7, in the first embodiment, the respective thicknesses of the first metal plate 11 and the second metal plate 12 are greater than or equal to 1.00 mm. The thickness of the third metal plate is less than 1.00 mm.

[0113] The third metal plate is easier to deform than the first metal plate 11 and the second metal plate 12. Consequently, the method for manufacturing the heat exchanger of the first embodiment can produce the heat exchanger 1A in which the main surface TS11 and the main surface TS12 are flat.

[0114] As above with reference to Fig. 1 to Fig. As described in section 7, the method for manufacturing heat exchangers of the first embodiment further comprises the finishing step, the application step of a first release agent and the application step of a second release agent.

[0115] This results in the first metal plate 11 and the several mountain sections M13 being joined by brazing. The second metal plate 12 and the several valley sections V13 are also joined by brazing. Consequently, the method for manufacturing the heat exchanger of the first embodiment allows for the simpler production of the heat exchanger 1A than in a housing where brazing is not the joining method.

[0116] As above with reference to Fig. 1 to Fig. As described in Figure 7, the heat exchanger 1A of the first embodiment comprises the first metal plate 11, the second metal plate 12, and the zigzag metal plate 13A. The zigzag metal plate 13A has several uplift sections M13 connected to the first metal plate 11 and several downlift sections V13 connected to the second metal plate 12. The first flow paths R1 are formed between the first metal plate 11 and the zigzag metal plate 13A, and the second flow paths R2 are formed between the second metal plate 12 and the zigzag metal plate 13A. The zigzag metal plate 13A is more easily deformed than the first metal plate 11 and the second metal plate 12. The heat exchanger 1A is expediently manufactured using the method for manufacturing heat exchangers of the first embodiment. Therefore, the main surface TS11 and the main surface TS12 of the heat exchanger 1A are flat.As a result, the heat exchanger 1A can efficiently cool the power storage module 33.

[0117] As above with reference to Fig. 1 to Fig. As described in section 7, in the heat exchanger 1A of the first embodiment, the main surface TS11 of the first metal plate 11 and the main surface TS12 of the second metal plate 12 are each planar.

[0118] This makes it easier for the main surface TS11 of the first metal plate 11 and the main surface TS12 of the second metal plate 12 to directly contact the power storage modules 33 than in a housing where the main surface TS11 of the first metal plate 11 and the main surface TS12 of the second metal plate 12 are not planar. As a result, the heat exchanger 1A can cool the power storage module 33 more efficiently.

[0119] As above with reference to Fig. 1 to Fig. As described in section 7, the thickness of the heat exchanger 1A in the first embodiment is less than or equal to 10 mm.

[0120] Therefore, the heat exchanger 1A is suitable as a cooler for cooling the power storage modules 33 in the device 30.

[0121] As above with reference to Fig. 1 to Fig. As described in Figure 7, the device 30 of the first embodiment comprises the multiple power storage modules 33 and the multiple heat exchangers 1A. The heat exchangers 1A are arranged between the mutually facing exposed electrode sections 50d between the power storage modules 33 adjacent in the stacking direction, so that they touch the exposed electrode sections 50d.

[0122] The main surfaces TS11 and TS12 of the heat exchanger 1A are flat. Therefore, the contact area between the exposed electrode section 50d and the heat exchanger 1A is larger than in a housing where the main surfaces TS11 and TS12 of the heat exchanger 1A are not flat. As a result, the device 30 can efficiently cool the power storage modules 33.

[0123] As above with reference to Fig. 1 to Fig. As described in Figure 7, the power storage device package 20 of the first embodiment comprises the power storage device 30 and the lower housing 60.

[0124] This allows the power storage device package 20 to efficiently cool the power storage modules 33. (2) Second embodiment

[0125] A method for manufacturing heat exchangers according to a second embodiment of the present disclosure is essentially similar to the method for manufacturing heat exchangers according to the first embodiment, except that the zigzag metal plate has through holes.

[0126] The method for manufacturing a heat exchanger according to the second embodiment is a method for manufacturing a heat exchanger 1B.

[0127] As in Fig. As shown in Figure 8, the heat exchanger 1B has the first metal plate 11, the second metal plate 12, a zigzag metal plate 13B, the first brazing layer 14 (see Figure 8). Fig. 2) and the second brazing material layer 15 (see Fig. 2) on. The structure of the zigzag metal plate 13B is similar to that of the zigzag metal plate 13A, with the difference that the zigzag metal plate 13B has third through holes TH3 that connect the first flow paths R1 and the second flow paths R2.

[0128] As with reference to Fig. As described in Figure 8, the zigzag metal plate 13B in the second embodiment further comprises the multiple third through-holes TH3, which connect the first flow paths R1 and the second flow paths R2. The multiple mountain sections M13 comprise the multiple straight mountain sections M13A (an example of the first mountain sections). The multiple valley sections V13 comprise the multiple straight valley sections V13A (an example of the first valley sections). The first distance L6 and the second distance L7 are equal.

[0129] This makes it easier to ensure that, when a fluid is supplied under pressure from the first through-hole TH1 and the second through-hole TH2 of the layered plate, the pressure distributions exerted on the first metal plate 11 and the second metal plate 12 are uniform, compared to a housing where the first distance L6 and the second distance L7 are not equal. Consequently, the method for manufacturing the heat exchanger according to the second embodiment can produce the heat exchanger 1B in which the main surface TS11 and the main surface TS12 are even flatter. (3) Modified examples

[0130] The methods for manufacturing heat exchangers of the first and second embodiments comprise the finishing step, the step of applying a first release agent, the step of applying a second release agent, the layering step, the joining step, and the pressurization step. However, if the method for manufacturing a heat exchanger according to the present disclosure comprises the layering step and the joining step, the method need not include at least one of the finishing step, the step of coating with the first release agent, the step of coating with the second release agent, or the pressurization step.

[0131] In the first embodiment, the multiple mountain sections M13 comprise the multiple straight mountain sections M13A, and the multiple valley sections V13 comprise the multiple straight valley sections V13A. However, in the method for manufacturing a heat exchanger according to the present disclosure, the multiple mountain sections M13 need not include the multiple straight mountain sections M13A, and the multiple valley sections V13 need not include the multiple straight valley sections V13A.

[0132] In the first embodiment, the first distance L6 and the second distance L7 are the same, but they can be different. In the first embodiment, the first flow paths R1 and the second flow paths R2 are independent. Therefore, the method for manufacturing the heat exchanger of the first embodiment can produce a heat exchanger in which the main surface TS11 and the main surface TS12 are flat, even if the first distance L6 and the second distance L7 are different.

[0133] In the first and second embodiments, the multiple straight mountain sections M13A (an example of the first mountain sections) and the multiple straight valley sections V13A (an example of the first valley sections) each extend along the Y-axis direction. However, in the present disclosure, the multiple straight mountain sections M13A and the multiple straight valley sections V13A need not extend along the Y-axis direction. For example, the first mountain sections and the second valley sections can be shaped as curves in the positive Y-axis direction.

[0134] In the first and second embodiments, either the first metal plate 11 or the second metal plate 12 contains an aluminum alloy of the 6000 series, and the third metal plate contains aluminum of the 1000 series. However, in the present disclosure, neither the first metal plate 11 nor the second metal plate 12 needs to contain an aluminum alloy of the 6000 series, and the third metal plate need not contain aluminum of the 1000 series. The respective materials of the first metal plate 11, the second metal plate 12, and the third metal plate are selected according to their respective thicknesses and the like, and it is sufficient for the materials to be metal.

[0135] In the first and second embodiments, the respective thicknesses of the first metal plate 11 and the second metal plate 12 are greater than or equal to 1.00 mm, and the thickness of the third metal plate is less than 1.00 mm. However, in the present disclosure, the respective thicknesses of the first metal plate 11 and the second metal plate 12 may be less than 1.00 mm, and the thickness of the third metal plate may be greater than or equal to 1.00 mm. The respective thicknesses of the first metal plate 11, the second metal plate 12, and the third metal plate are selected in accordance with the respective materials of the first metal plate 11, the second metal plate 12, and the third metal plate, etc.

[0136] In the case of a consideration where the manufacturing process of the heat exchanger of the present disclosure does not include the finishing step, the first step of applying the release agent, and the second step of applying the release agent (hereinafter "the first case"), the multiple mountain sections of the zigzag metal plate may be joined to the first metal plate by a method other than brazing, and the multiple valley sections of the zigzag metal plate may be joined to the second metal plate by a method other than brazing. The joining method, which differs from brazing, is selected according to the respective materials of the first metal plate, the second metal plate, and the third metal plate, and the like, and examples include welding (e.g., laser welding or the like), deposition (e.g.,Friction Stir Welding (FSW), Friction Stir Spot Welding (FSSW), and the like. If the method for manufacturing the heat exchanger according to the present disclosure is the first case, the heat exchanger 1A and the heat exchanger 1B need not have the first brazing layer 14 and the second brazing layer 15, respectively. If the method for manufacturing the heat exchanger according to the present disclosure is the first case, the joining of the first metal plate and the third metal plate in the regions of the layered plate corresponding to the mountain sections, and the joining of the second metal plate and the third metal plate in the regions of the layered plate corresponding to the valley sections, can be carried out separately and not simultaneously.

[0137] In heat exchangers 1A and 1B, the main surfaces TS11 and TS12 are planar. However, in the present disclosure, the main surfaces TS11 and TS12 need not be planar. For example, a projecting section may be provided at the respective edges of main surfaces TS11 and TS12, projecting in the direction of the thickness (Z-axis) of heat exchangers 1A and 1B.

[0138] Although the respective thicknesses of heat exchanger 1A and heat exchanger 1B are less than or equal to 10 mm, in the present disclosure the respective thicknesses of heat exchanger 1A and heat exchanger 1B may be greater than 10 mm.

[0139] In the first and second embodiments, the heat exchange medium is a cooling medium. However, in the present disclosure, the heat exchange medium can also be a heating medium. In a housing where the heat exchange medium is a heating medium, heat exchanger 1A and heat exchanger 1B can heat the heat exchange targets that thermally contact the main surface TS11 and the main surface TS12, respectively. Examples of heating media include heating liquids, heating gases, and the like. The heating liquids are not particularly limited, provided they are liquids generally used as heating fluids, such as water, oil, aqueous glycol-based solutions, air conditioning refrigerants, non-electrically conductive liquids, phase-change fluids, and the like. Examples of heating gases include air, water vapor, and the like.The temperature of the heating medium is set according to the type of heat exchange objective and the like.

Claims

[1] Method of manufacturing a heat exchanger (1A; 1B) wherein the heat exchanger (1A; 1B) has a first metal plate (11) having at least one first through-hole (TH1), a second metal plate (12) having at least one second through-hole (TH2), and a zigzag metal plate (13A; 13B) arranged between the first metal plate (11) and the second metal plate (12), wherein the zigzag metal plate (13A; 13B) is formed by a third metal plate in the form of a flat plate, which is formed in a zigzag shape. the zigzag metal plate (13A; 13B) has a multitude of mountain sections (M13) joined with the first metal plate (11) and a multitude of valley sections (V13) joined with the second metal plate (12), first flow paths (R1) connected to the at least one first through-hole (TH1) are formed between the first metal plate (11) and the zigzag metal plate (13A; 13B), and second flow paths (R2) connected to the at least one second through-hole (TH2) are formed between the second metal plate (12) and the zigzag metal plate (13A; 13B), and The third metal plate, which is in the form of a flat plate, deforms more easily than both the first metal plate (11) and the second metal plate (12) because it has a lower stiffness than both the first metal plate (11) and the second metal plate (12). The procedure comprises the following steps: Providing a layered plate by layering the first metal plate (11), the third metal plate formed in the form of a flat plate and the second metal plate (12) in that order; Joining the first metal plate (11) and the third metal plate, which is in the form of a flat plate, in regions of the layered plate corresponding to the mountain sections (M13), by brazing; Joining the second metal plate (12) and the third metal plate, which is in the form of a flat plate, at regions of the layered plate corresponding to the valley sections (V13), by brazing; and Supplying a fluid under pressure into the at least one first through-hole (TH1) and the at least one second through-hole (TH2) and pressing and widening the third metal plate, which is formed in the form of a flat plate, to form the third metal plate, which is formed in the form of a flat plate, into the zigzag metal plate (13A; 13B). [2] Method of manufacturing a heat exchanger according to claim 1, wherein the zigzag metal plate (13A) has no third through-holes (TH3) connecting the first flow paths (R1) and the second flow paths (R2), the plurality of mountain sections (M13) comprise a plurality of first mountain sections (M13A) which are configured to be spaced at a first distance (L6) along a first direction that is perpendicular to a thickness direction of the heat exchanger (1A; 1B), and the multitude of valley sections (V13) comprise a multitude of first valley sections (V13A) which are designed to be spaced at a second distance (L7) along the first direction. [3] Method of manufacturing a heat exchanger according to claim 2, wherein the first mountain sections (M13) and the first valley sections (V13) each extend along a second direction that is perpendicular to each of the first direction and the thickness direction of the heat exchanger (1A; 1B), and the first mountain sections (M13) and the first valley sections (V13) are formed alternately along the first direction. [4] Method of manufacturing a heat exchanger according to any one of claims 1 to 3, wherein the first metal plate (11) and the second metal plate (12) each contain an aluminum alloy of the 6000 series, and The third metal plate, which is shaped like a flat plate, contains aluminum of the 1000 series. [5] Method of manufacturing a heat exchanger according to any one of claims 1 to 4, wherein the respective thicknesses of the first metal plate (11) and the second metal plate (12) are greater than or equal to 1.00 mm, and the thickness of the third metal plate, which is in the form of a flat plate, is less than 1.00 mm. [6] Method of manufacturing a heat exchanger according to any one of claims 1 to 5, wherein the zigzag metal plate (13B) furthermore has at least a third through-hole (TH3) that connects the first flow paths (R1) and the second flow paths (R2), the plurality of mountain sections (M13) comprise a plurality of first mountain sections (M13A) which are designed to be spaced at a first distance (L6) along a first direction which is perpendicular to a thickness direction of the heat exchanger (1B), the multitude of valley sections (V13) comprise a multitude of first valley sections (V13A) which are designed to be spaced at a second distance (L7) along the first direction, and the first distance (L6) and the second distance (L7) are the same. [7] Method of manufacturing a heat exchanger according to any one of claims 1 to 6, further comprising the following steps: Finishing a first brazing sheet (1100) in which a first brazing material layer (14) is formed for joining the plurality of mountain sections (M13) to the first metal plate (11) at a main surface (TS11) of the first metal plate (11), and a second brazing sheet (1200) in which a second brazing material layer (15) is formed for joining the plurality of valley sections (V13) to the second metal plate (12) at a main surface (TS12) of the second metal plate (12); Applying a release agent to the first brazing sheet (1100) by applying a first release agent to regions of a main surface (S14) of the first brazing material layer (14) that are different from regions where the multitude of mountain sections (M13) are to be joined; and Applying a release agent to the second brazing sheet (1200) by applying a second release agent to regions of a main surface (S15) of the second brazing material layer (15) that are different from regions where the multitude of valley sections (V13) are to be joined, wherein a provision of the layered plate comprises layering the first brazing sheet (1100) with a separating agent, the third metal plate formed in the form of a flat plate and the second brazing sheet (1200) with a separating agent such that the first metal plate (11), the first brazing material layer (14), the third metal plate formed in the form of a flat plate, the second brazing material layer (15) and the second metal plate (12) are layered in this order, and The process includes joining the first metal plate (11) and the third metal plate, which is in the form of a flat plate, joining the second metal plate (12) and the third metal plate, which is in the form of a flat plate, heating the layered plate, brazing the first metal plate (11) and the third metal plate, which is in the form of a flat plate, and brazing the second metal plate (12) and the third metal plate, which is in the form of a flat plate. [8] Heat exchanger comprising a first metal plate (11) having at least one first through-hole (TH1), a second metal plate (12) having at least one second through-hole (TH2), and a zigzag metal plate (13A; 13B) arranged between the first metal plate (11) and the second metal plate (12), wherein the zigzag metal plate (13A; 13B) is formed by a third metal plate in the form of a flat plate and in a zigzag shape, wherein the zigzag metal plate (13A; 13B) has a multitude of mountain sections (M13) joined with the first metal plate (11) and a multitude of valley sections (V13) joined with the second metal plate (12), first flow paths (R1) which are connected to the at least one first through-hole (TH1) are formed between the first metal plate (11) and the zigzag metal plate (13A; 13B), and second flow paths (R2) which are connected to the at least one second through-hole (TH2) are formed between the second metal plate (12) and the zigzag metal plate (13A; 13B); the zigzag metal plate (13A; 13B) deforms more easily than both the first metal plate (11) and the second metal plate (12) because it has a lower stiffness than both the first metal plate (11) and the second metal plate (12); the multitude of mountain sections (M13) are joined with the first metal plate (11) in a straight or curved line; and the multitude of valley sections (V13) are joined with the second metal plate (12) in a straight or curved line. [9] Heat exchanger according to claim 8, wherein a main surface (TS11) of the first metal plate (11) and a main surface (TS12) of the second metal plate (12) are each flat. [10] Heat exchanger according to claim 8 or 9, wherein the thickness of the heat exchanger (1A; 1B) is less than or equal to 10 mm.

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