Heat exchange device and battery pack

Abstract

The invention provides a heat exchange device capable of improving cooling performance. A heat exchange device according to one embodiment of the present invention is provided with: a bag body having therein a heat exchange flow path through which a heat exchange medium flows; and a plate-shaped body having therein a supply flow path that communicates with one end of the heat exchange flow path and supplies the heat exchange medium to the heat exchange flow path, and a recovery flow path that communicates with the other end of the heat exchange flow path and recovers the heat exchange medium, the bag body is provided with an inflow port through which the heat exchange medium flows in and an outflow port through which the heat exchange medium flows out, and the plate-shaped body is provided with: a first boss part which is communicated with the supply flow path and is provided with an outflow hole through which the heat exchange medium flows out; and a second boss part having an inflow hole that communicates with the recovery flow path and into which the heat exchange medium flows, the first boss part being fitted to the inflow hole, and the second boss part being fitted to the outflow hole.

Description

Technical Field

[0001] The present invention relates to a heat exchange device and a battery pack. Background Art

[0002] Conventionally, a heat exchange device for cooling heat generated during use of a battery mounted on an electric vehicle or the like has been known.

[0003] For example, Patent Document 1 discloses a battery cooling device including: a cooler disposed between a lower surface of a battery module and an upper surface of a bottom plate portion of a battery case; a partition portion formed inside the cooler to connect an upper wall portion and a lower wall portion of the cooler; and a plurality of rectifying paths through which a coolant flows and is formed inside the cooler in a horizontally arranged manner by being partitioned by the partition portion.

[0004] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2018-163741 Summary of the Invention

[0005] However, in such a conventional heat exchange device, since the cooling portion is the lower surface of the battery, heat generation from the side of the battery cannot be suppressed, and there is a problem that sufficient cooling performance cannot be obtained.

[0006] In view of the above problems, an object of the present invention is to provide a heat exchange device capable of improving cooling performance.

[0007] A heat exchange device according to an aspect of the present invention includes: a bag body having a heat exchange flow path inside through which a heat exchange medium flows; and a plate-like body having a supply flow path and a recovery flow path inside, the supply flow path communicating with one end of the heat exchange flow path to supply the heat exchange medium to the heat exchange flow path, the recovery flow path communicating with the other end of the heat exchange flow path to recover the heat exchange medium, the bag body having a flow inlet through which the heat exchange medium flows in and a flow outlet through which the heat exchange medium flows out, the plate-like body having: a first boss portion having an outflow hole communicating with the supply flow path and through which the heat exchange medium flows out; and a second boss portion having an inflow hole communicating with the recovery flow path and through which the heat exchange medium flows in, the first boss portion being fitted into the flow inlet, and the second boss portion being fitted into the flow outlet.

[0008] According to a heat exchange device of an aspect of the present invention, cooling performance can be improved. Brief Description of the Drawings

[0009] Figure 1 It is a perspective view of a heat exchange device according to an embodiment as viewed from one direction.

[0010] Figure 2 It is an exploded perspective view of a heat exchange device according to an embodiment as viewed from one direction.

[0011] Figure 3 It is a perspective view of a heat exchange device according to an embodiment as viewed from another direction.

[0012] Figure 4 It is a perspective view of a bag body according to an embodiment.

[0013] Figure 5 It shows Figure 4 the cross-sectional view taken along line I-I.

[0014] Figure 6 It is a schematic diagram of a cross-section of a front sheet of a bag body according to an embodiment.

[0015] Figure 7 It is a diagram illustrating the flow of a heat exchange medium in a heat exchange device according to an embodiment.

[0016] Figure 8 It is a perspective view of a battery pack according to an embodiment as viewed from one direction.

[0017] Description of Reference Numerals

[0018] 1 Heat exchange device

[0019] 2 Bag body

[0020] 21 Front sheet

[0021] 211 First sealant layer

[0022] 22 Back sheet

[0023] 221 Second sealant layer

[0024] 23 Heat exchange flow path

[0025] 24 First port member

[0026] 241 Inlet

[0027] 25 Second port member

[0028] 251 Outlet

[0029] 3 Plate-like body

[0030] 31 Supply flow path

[0031] 32 Recovery flow path

[0032] 33 First boss portion

[0033] 331 Outflow hole

[0034] 34 Second boss portion

[0035] 341 Inflow hole

[0036] 4 battery cells

[0037] 10 battery packs

[0038] L heat exchange medium

[0039] S1 peripheral seal

[0040] S2 inner seal Detailed implementation manners

[0041] Hereinafter, while referring to the drawings, the manners for implementing the present invention will be described. In addition, for easy understanding of the description, the same reference numerals are assigned to the same components in the respective drawings, and repeated descriptions may be omitted. In this specification, a three-dimensional orthogonal coordinate system of three axes (X direction, Y direction, Z direction) is used. In the plane parallel to the front surface F1 of the plate-like body 3, one of the two mutually orthogonal directions is set as the X direction, the other direction is set as the Y direction, and the direction perpendicular to the front surface F1 of the plate-like body 3 is set as the Z direction. In addition, the posture of the heat exchange device 1 during use is not limited to Figure 1 and Figure 2 the example shown

[0042] <Heat exchange device>

[0043] Figure 1 is a perspective view of a heat exchange device according to an embodiment as viewed from one direction, Figure 2 is an exploded perspective view of a heat exchange device according to an embodiment as viewed from one direction, Figure 3 is a perspective view of a heat exchange device according to an embodiment as viewed from another direction, Figure 4 is a perspective view of a bag body according to an embodiment, Figure 5 shows Figure 4 the I-I cross-sectional view of Figure 4 In

[0044] As Figures 1 to 4 shown, the heat exchange device 1 includes a bag body 2 having a heat exchange flow path 23 inside for the heat exchange medium L to flow through, and a plate-like body 3. The plate-like body 3 has inside: a supply flow path 31 that communicates with one end of the heat exchange flow path 23 and supplies the heat exchange medium L to the heat exchange flow path 23; and a recovery flow path 32 that communicates with the other end of the heat exchange flow path 23 and recovers the heat exchange medium L. In Figures 1 to 3 the example shown, a plurality of bag bodies 2 are arranged and mounted on the plate-like body 3 in an isolated manner. In this case, by arranging a cooling object such as a battery between adjacent bag bodies 2, the cooling object can be cooled. In the present embodiment, an example in which the heat exchange device 1 has a plurality of bag bodies 2 is described, but it is not limited thereto, and the heat exchange device 1 may have one bag body 2.

[0045] The bag body 2 has an inlet 241 for the heat exchange medium L to flow in and an outlet 251 for the heat exchange medium L to flow out. The shape of the bag body 2 can be, for example, a quadrilateral in a top view.

[0046] As Figure 5 shown, the bag body 2 can have a front sheet 21 and a back sheet 22 opposite to the front sheet 21. The bag body 2 can be formed by bending a single sheet, or by laminating multiple sheets. That is, the front sheet 21 and the back sheet 22 that make up the bag body 2 can be formed from a single sheet, or can be formed from different sheets respectively.

[0047] The front sheet 21 can be composed of a laminated film having a first sealant layer 211 on the innermost side, and the back sheet 22 can be composed of a laminated film having a second sealant layer 221 on the innermost side.

[0048] Specifically, the front sheet 21 can be composed of a laminated film formed by laminating a first sealant layer 211 and a base material layer 212. From the viewpoint of heat weldability, the material constituting the first sealant layer 211 is preferably the same material as the material constituting the subsequent first port member 24 and second port member 25.

[0049] As the material constituting the first sealant layer 211, for example, polyethylene, polypropylene, etc. can be cited. The material constituting the first sealant layer 211 is preferably polypropylene. By making the material constituting the first sealant layer 211 polypropylene, the seal part (heat weld part) of the bag body 2 can obtain high adhesive strength in a high temperature environment, and in addition, the bag body 2 can have appropriate rigidity. As polypropylene, unstretched polypropylene (CPP) can be appropriately used.

[0050] The material constituting the first sealant layer 211 more preferably includes block polypropylene. Thereby, it is possible to suppress the penetration of the heat exchange medium L from the first sealant layer 211 into the base material layer 212.

[0051] The first sealant layer 211 can be composed of one layer, or can be composed of multiple layers. When the first sealant layer 211 is composed of multiple layers, it is preferably a three-layer structure in which a layer composed of block polypropylene is sandwiched between two layers composed of random polypropylene. The layer composed of block polypropylene has the function of suppressing the penetration of the heat exchange medium L into other adjacent layers, and the layer composed of random polypropylene has the function of firmly adhering to other layers. Therefore, by forming the above three-layer structure, the durability of the bag body 2 can be improved.

[0052] The base material layer 212 can be composed of one layer, or can be composed of multiple layers. Figure 6 It is a schematic cross-sectional view of the front sheet of the bag body in one embodiment. As Figure 6As shown, the base material layer 212 can be composed of multiple layers formed by sequentially laminating a metal layer 212a and resin layers 212b and 212c on the first sealant layer 211, for example.

[0053] The metal layer 212a can be formed as a metal foil, a metal vapor deposition film, etc., for example. Examples of the material constituting the metal layer 212a include aluminum, copper, stainless steel, and titanium. Among these, the material constituting the metal layer 212a preferably includes aluminum. Thereby, the cooling efficiency of the heat exchange device 1 can be further improved, and the weight can be reduced.

[0054] The thickness of the metal layer 212a is preferably 7 μm or more, more preferably 30 μm or more. By making the thickness of the metal layer 212a 7 μm or more, the cooling efficiency of the heat exchange device 1 can be further improved, and good processability can be obtained. The thickness of the metal layer 212a is preferably 60 μm or less, more preferably 50 μm or less. By making the thickness of the metal layer 212a 60 μm or less, the bag body 2 can have sufficient flexibility to adhere to the heat exchange object.

[0055] In Figure 6 In the example shown, the resin layer is composed of two layers, but it can also be composed of one layer or three or more layers. In the case where the resin layers 212b and 212c are composed of two layers, for example, the material constituting the inner resin layer 212b can be nylon, and the material constituting the outer resin layer 212c can be polyethylene terephthalate. By making the material constituting the resin layer 212b nylon, the pressure resistance when the heat exchange medium L flows through the heat exchange flow path 23 in the bag body 2 can be improved, and the generation of pinholes can be suppressed. By making the material constituting the resin layer 212c polyethylene terephthalate, the scratch resistance of the bag body 2 can be improved. Examples of the material constituting the resin layers 212b and 212c include nylon, polyethylene terephthalate, polyester, etc.

[0056] The layers constituting the front sheet 21 can be joined by means of an adhesive layer or an anchor layer, or can be directly joined. The front sheet 21 can have other layers other than the metal layer 212a and the resin layers 212b and 212c on the outside of the first sealant layer 211.

[0057] The structure of the back sheet 22 is the same as that of the above-mentioned front sheet 21, so the description is omitted. In addition, the structure of the second sealant layer 221 is the same as that of the above-mentioned first sealant layer 211, so the description is omitted.

[0058] The thickness of each of the front sheet 21 and the back sheet 22 is preferably 150 μm or more and 350 μm or less, more preferably 200 μm or more and 300 μm or less.

[0059] As Figure 4 andFigure 5 As shown, the bag body 2 may have a peripheral seal portion S1 formed by joining a first sealant layer 211 and a second sealant layer 221 at the peripheral portion, and may have an inner seal portion S2 formed by joining the first sealant layer 211 and the second sealant layer 221 inside the peripheral seal portion S1. The peripheral seal portion S1 and the inner seal portion S2 are, for example, seal portions formed by heat-sealing the first sealant layer 211 and the second sealant layer 221. The bag body 2 may be a bag container.

[0060] The heat exchange flow path 23 is formed by the peripheral seal portion S1, the inner seal portion S2, and the inner surface of the bag body 2. Figure 4 In the example shown, the heat exchange flow path 23 has a wave shape with three turning portions in a plan view. The shape of the heat exchange flow path 23 in a plan view may be, for example, a rectangular wave shape, a sine wave shape, or a triangular wave shape. That is, the shape of the heat exchange flow path 23 in a plan view may be a shape in which a U-shaped is repeated, or a shape in which a V-shaped is repeated. When the heat exchange flow path 23 has a wave shape in a plan view, the number of turning portions may be odd.

[0061] The bag body 2 may have: a first port member 24 having an inlet 241; and a second port member 25 having an outlet 251. The first port member 24 and the second port member 25 are each disposed between the front sheet 21 and the back sheet 22 and are heat-sealed to the first sealant layer 211 and the second sealant layer 221.

[0062] As a material for forming the first port member 24 and the second port member 25, any material that can be joined to the first sealant layer 211 and the second sealant layer 221 to ensure airtightness can be suitably used, and a material that can be heat-sealed to the first sealant layer 211 and the second sealant layer 221 is preferred. From the viewpoint of heat-sealability, the material for forming the first port member 24 and the second port member 25 is more preferably the same material as the material for forming the first sealant layer 211 and the second sealant layer 221.

[0063] The first port member 24 and the second port member 25 may be tubular members, or may have a flange portion extending outward from one end. The first port member 24 and the second port member 25 may be pipe openings. Since the first port member 24 and the second port member 25 are pipe openings having flange portions, the contact areas of the first port member 24 and the second port member 25 with the first sealant layer 211 and the second sealant layer 221 are increased, so that the bonding strength between them can be improved.

[0064] When the shape of the bag body 2 is a quadrilateral in a top view, the first port member 24 and the second port member 25 are provided on one side of the bag body 2. According to this structure, the supply flow path 31 and the recovery flow path 32 can be concentrated and arranged on this side of the bag body 2, and the heat exchange device 1 can be miniaturized. In Figures 1 to 4 In the example shown, the shape of the bag body 2 is a rectangle in a top view, and the first port member 24 and the second port member 25 are provided on the short side of the bag body 2.

[0065] As Figure 3 shown, the plate-like body 3 has: a first boss portion 33 having an outflow hole 331 that communicates with the supply flow path 31 and through which the heat exchange medium L flows out; and a second boss portion 34 having an inflow hole 341 that communicates with the recovery flow path 32 and through which the heat exchange medium L flows in. In addition, the first boss portion 33 is fitted into the inlet port 241, and the second boss portion 34 is fitted into the outlet port 251. By fitting the first boss portion 33 into the inlet port 241 and the second boss portion 34 into the outlet port 251, the outflow hole 331 of the first boss portion 33 communicates with the inlet port 241 of the bag body 2, and the inflow hole 341 of the second boss portion 34 communicates with the outlet port 251 of the bag body 2. The outflow hole 331 and the inlet port 241 are arranged coaxially, and the inflow hole 341 and the outlet port 251 are arranged coaxially.

[0066] The plate-like body 3 may have a plurality of first boss portions 33 and a plurality of second boss portions 34. When the plate-like body 3 has a plurality of first boss portions 33 and a plurality of second boss portions 34, a plurality of pairs of first boss portions 33 and second boss portions 34 are provided on the back surface of the plate-like body 3 (the surface on which the bag body 2 is arranged) in an isolated manner.

[0067] The first boss portion 33 is fitted into the inlet port 241 in a liquid-tight state, and the second boss portion 34 is fitted into the outlet port 251 in a liquid-tight state. The first boss portion 33 and the inlet port 241 can be fitted with an O-ring, can be heat-welded, or can be fitted with an adhesive. The second boss portion 34 and the outlet port 251 can be fitted with an O-ring, can be heat-welded, or can be fitted with an adhesive. As the adhesive, for example, an adhesive including modified silicone can be cited.

[0068] Figure 7 is a diagram for explaining the flow of the heat exchange medium in the heat exchange device according to an embodiment. In Figure 7 , the supply flow path 31, the recovery flow path 32, and the heat exchange flow path 23 are indicated by dotted lines, and other structures are omitted. In addition, in Figure 7 , the arrows indicate the flow of the heat exchange medium L. As Figure 7As shown, the heat exchange medium L flowing in the supply flow path 31 inside the plate-like body 3 flows into one end (the upstream end) of the heat exchange flow path 23 inside the bag body 2 from the inflow port 241 of the bag body 2 through the outflow hole 331, and when it reaches the other end of the heat exchange flow path 23, it flows into the recovery flow path 32 inside the plate-like body 3 from the inflow hole 341 through the outflow port 251 of the bag body 2.

[0069] During the heat exchange medium L flowing in the heat exchange flow path 23, heat exchange is performed with the object to be heat-exchanged, and by circulating as shown in Figure 7 it is possible to maintain the cooling performance of the heat exchange device 1. When the heat exchange device 1 has a plurality of bag bodies 2, the heat exchange medium L flowing in the supply flow path 31 inside the plate-like body 3 is branched to the respective inflow ports 241 of the plurality of bag bodies 2, and the heat exchange medium L flowing out from the respective outflow ports 251 of the plurality of bag bodies 2 merges into the recovery flow path 32 inside the plate-like body 3. The heat exchange medium L merged in the recovery flow path 32 is, for example, sent to a radiator or the like and cooled, and then returns to the supply flow path 31 again. In the example shown in Figure 7 the heat exchange medium L flowing in the supply flow path 31 is branched in a direction perpendicular to the supply flow path 31, and the heat exchange medium L flowing out from the respective outflow ports 251 of the plurality of bag bodies 2 merges in a direction perpendicular to the recovery flow path 32.

[0070] The plate-like body 3 has a first groove portion 35 and a second groove portion 36 that are open on the front surface (the surface opposite to the surface on which the bag body 2 is disposed) F1 and extend in the first direction (X direction), and the first groove portion 35 and the second groove portion 36 are arranged in parallel. That is, the front surface F1 of the plate-like body 3 has two opening portions 351, 361. The plate-like body 3 has a sealing member 37 that seals the opening portions 351, 361 of the first groove portion 35 and the second groove portion 36 respectively. The plate-like body 3 may have two sealing members 37, and one opening portion is sealed with one sealing member 37. The plate-like body 3 may have one sealing member 37, and the two opening portions 351, 361 are sealed with one sealing member 37.

[0071] The sealing member 37 can be formed as a film-like member or a sheet-like member. The thickness of the sealing member 37 can be, for example, 10 μm or more and 100 μm or less. The sealing member 37 may have a heat-sealing resin layer on one surface. When the sealing member 37 has a heat-sealing resin layer on one surface, the heat-sealing resin layer can be heat-sealed to the front surface F1 of the plate-like body 3. As the material constituting the heat-sealing resin layer, for example, polyethylene, polypropylene, etc. can be cited. The heat-sealing resin layer can be composed of one layer or multiple layers.

[0072] <Battery pack>

[0073] Figure 8 is a perspective view of a battery pack according to an embodiment as viewed from one direction. As shown inFigure 8 As shown, the battery pack 10 of the present embodiment has the heat exchange device 1 of the present embodiment and a plurality of battery cells 4. In addition, the plurality of battery cells 4 are respectively disposed between the respective bags of the plurality of bags 2. Preferably, the plurality of battery cells 4 are respectively disposed in contact with the connected bags 2. In Figure 8 In the example shown, when viewed from the X direction, the outer dimension of the battery cell 4 is smaller than the outer dimension of the bag 2, but it may be larger than the outer dimension of the bag 2 or may be the same as the outer dimension of the bag 2.

[0074] The battery pack 10 may have a support member 5 that supports the plurality of battery cells 4. The battery pack 10 may also have a cover (not shown) that covers the heat exchange device 1 and the plurality of battery cells 4.

[0075] As described above, the heat exchange device 1 of the present embodiment has a bag 2 and a plate-like body 3 having a supply flow path 31 and a recovery flow path 32. The bag 2 has an inlet 241 and an outlet 251. The plate-like body 3 has a first boss portion 33 and a second boss portion 34. The first boss portion 33 is fitted into the inlet 241, and the second boss portion 34 is fitted into the outlet 251. With this structure, the heat exchange device 1 can dispose the bag 2 opposite to both side surfaces of the heat exchange object, so that cooling can be performed from both side surfaces of the heat exchange object. In addition, when the heat exchange object is a battery, even if the battery expands due to charge and discharge, deterioration over time, increase in internal pressure, etc., the bag 2 follows the deformation of the battery and can maintain the state of being in contact with the battery. Therefore, according to the heat exchange device 1, the cooling performance can be improved. Moreover, the first boss portion 33 is fitted into the inlet 241, and the second boss portion 34 is fitted into the outlet 251, whereby leakage of the heat exchange medium L from the connection portion between the bag 2 and the plate-like body 3 can be suppressed, and the cooling performance of the heat exchange device 1 can be maintained.

[0076] In the present embodiment, the bag 2 has a front sheet 21, a back sheet 22, a first port member 24, and a second port member 25. In addition, the front sheet 21 is formed of a laminated film having a first sealant layer 211 on the innermost side, and the back sheet 22 is formed of a laminated film having a second sealant layer 221 on the innermost side. Moreover, the first port member 24 and the second port member 25 are respectively disposed between the front sheet 21 and the back sheet 22 and are heat-sealed to the first sealant layer 211 and the second sealant layer 221. With this structure, the first port member 24 and the second port member 25 are respectively heat-sealed to the first sealant layer 211 and the second sealant layer 221, so that they can be joined to the first sealant layer 211 and the second sealant layer 221 with sufficient bonding strength. Therefore, leakage of the heat exchange medium L from the bag 2 can be suppressed, and the cooling performance of the heat exchange device 1 can be further maintained.

[0077] In the present embodiment, the outflow hole 331 and the inflow hole 241 are arranged coaxially, and the inflow hole 341 and the outflow hole 251 are arranged coaxially. Thereby, the pressure loss when the heat exchange medium L flows into or out of the bag body 2 can be reduced, and the heat exchange medium L can cover the entire bag body 2. Therefore, according to the heat exchange device 1, the cooling performance can be further improved.

[0078] In the present embodiment, the bag body 2 has a peripheral sealing portion S1 and an inner sealing portion S2, and the heat exchange flow path 23 is formed by the peripheral sealing portion S1, the inner sealing portion S2, and the inner surface of the bag body 2. According to this structure, the width of the inner sealing portion S2 can be made relatively small, so that the ratio of the area of the heat exchange flow path 23 to the area of the bag body 2 can be increased. Therefore, the contact area between the heat exchange medium L and the object to be heat-exchanged can be made relatively large, and the cooling performance of the heat exchange device 1 can be further improved.

[0079] In the present embodiment, each of the front sheet 21 and the back sheet 22 includes a metal layer. Thereby, the heat exchange efficiency of the heat exchange device 1 can be improved, and thus the cooling performance can be further improved.

[0080] In the present embodiment, the plate-like body 3 has a plurality of first boss portions 33 and a plurality of second boss portions 34, and a plurality of bag bodies 2 are mounted on the plate-like body 3 so as to be arranged separately from each other. According to this structure, when the object to be heat-exchanged is a battery, a plurality of battery cells constituting the battery can be respectively arranged between the respective bag bodies 2 of the plurality of bag bodies 2, and all the battery cells can be cooled from both side surfaces. Therefore, the cooling performance of the heat exchange device 1 can be further improved.

[0081] The battery pack 10 of the present embodiment has a heat exchange device 1 and a plurality of battery cells 4, and the plurality of battery cells 4 are respectively arranged between the respective bag bodies 2 of the plurality of bag bodies 2. According to this structure, the heat exchange device 1 can cool the battery cells 4 from both side surfaces. In addition, even if the battery cells 4 expand due to charge and discharge, deterioration over time, increase in internal pressure, etc., the bag body 2 can follow the deformation of the battery cells 4 and maintain the state of being in contact with the battery cells 4. Therefore, according to the battery pack 10, the cooling performance of the battery cells 4 can be improved.

[0082] (Aspect of the present invention)

[0083] The present invention includes the following aspects.

[0084] <Aspect 1>

[0085] A heat exchange device, comprising:

[0086] A bag body having a heat exchange flow path for allowing a heat exchange medium to flow therein; and

[0087] A plate-like body having a supply flow path and a recovery flow path inside, the supply flow path communicating with one end of the heat exchange flow path and supplying the heat exchange medium to the heat exchange flow path, and the recovery flow path communicating with the other end of the heat exchange flow path and recovering the heat exchange medium.

[0088] The bag body has a fluid inlet for the heat exchange medium to flow in and a fluid outlet for the heat exchange medium to flow out.

[0089] The plate-like body has: a first boss portion having an outflow hole communicating with the supply flow path and through which the heat exchange medium flows out; and a second boss portion having an inflow hole communicating with the recovery flow path and through which the heat exchange medium flows in.

[0090] The first boss portion is fitted into the fluid inlet, and the second boss portion is fitted into the fluid outlet.

[0091] <Mode 2>

[0092] The heat exchange device according to Mode 1.

[0093] The bag body includes a front sheet, a back sheet opposite to the front sheet, a first port member having the fluid inlet, and a second port member having the fluid outlet.

[0094] The front sheet is composed of a laminated film having a first sealant layer on the innermost side.

[0095] The back sheet is composed of a laminated film having a second sealant layer on the innermost side.

[0096] The first port member and the second port member are respectively disposed between the front sheet and the back sheet and are heat-sealed to the first sealant layer and the second sealant layer.

[0097] <Mode 3>

[0098] The heat exchange device according to Mode 1 or 2, wherein the outflow hole and the fluid inlet are arranged coaxially, and the inflow hole and the fluid outlet are arranged coaxially.

[0099] <Mode 4>

[0100] The heat exchange device according to Mode 2 or 3.

[0101] The bag body has a peripheral seal portion formed by joining the first sealant layer and the second sealant layer at the peripheral portion, and an inner seal portion formed by joining the first sealant layer and the second sealant layer inside the peripheral seal portion.

[0102] The heat exchange flow path is constituted by the peripheral seal portion, the inner seal portion, and the inner surface of the bag body.

[0103] <Mode 5>

[0104] The heat exchange device according to any one of Modes 2 to 4,

[0105] Each of the front sheet and the back sheet includes a metal layer.

[0106] <Mode 6>

[0107] The heat exchange device according to any one of Modes 1 to 5,

[0108] The plate-like body has a plurality of the first boss portions and a plurality of the second boss portions,

[0109] A plurality of the bag bodies are mounted on the plate-like body in a mutually isolated and arranged manner.

[0110] <Mode 7>

[0111] A battery pack includes:

[0112] The heat exchange device according to any one of Modes 1 to 6; and

[0113] A plurality of battery cells,

[0114] The plurality of battery cells are respectively disposed between the respective bag bodies of the plurality of bag bodies.

[0115] The heat exchange device 1 of the present embodiment includes a heat exchange device for cooling a vehicle battery. In addition, the heat exchange device 1 can be applied to a heat exchange device for cooling a motor mounted on a vehicle, a heat exchange device for cooling a power semiconductor element of an electric drive device, and the like. The heat exchange device 1 can also be applied to a heat exchange device for heating by using a heat exchange medium L for heating.

[0116] As described above, the embodiments are described, but the above embodiments are presented as examples, and the present invention is not limited to the above embodiments. The above embodiments can be implemented in various other ways, and various combinations, omissions, substitutions, changes, etc. can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are included within the invention described in the claims and its equivalents.

Claims

1. A heat exchange device, comprising: A bag body having a heat exchange flow path inside for the heat exchange medium to flow through; And A plate-like body having a supply flow path and a recovery flow path inside. The supply flow path communicates with one end of the heat exchange flow path and supplies the heat exchange medium to the heat exchange flow path. The recovery flow path communicates with the other end of the heat exchange flow path and recovers the heat exchange medium. The bag body has a flow inlet for the heat exchange medium to flow in and a flow outlet for the heat exchange medium to flow out. The plate-like body has: a first boss portion having an outflow hole communicating with the supply flow path and through which the heat exchange medium flows out; and a second boss portion having an inflow hole communicating with the recovery flow path and through which the heat exchange medium flows in. The first boss portion is fitted into the flow inlet, and the second boss portion is fitted into the flow outlet.

2. The heat exchange device according to claim 1, wherein The bag body includes a front sheet, a back sheet opposite to the front sheet, a first port member having the flow inlet, and a second port member having the flow outlet. The front sheet is composed of a laminated film having a first sealant layer on the innermost side. The back sheet is composed of a laminated film having a second sealant layer on the innermost side. The first port member and the second port member are respectively disposed between the front sheet and the back sheet and are heat-sealed to the first sealant layer and the second sealant layer.

3. The heat exchange device according to claim 1 or 2, wherein The outflow hole and the flow inlet are arranged coaxially, and the inflow hole and the flow outlet are arranged coaxially.

4. The heat exchange device according to claim 2, wherein The bag body has a peripheral seal portion formed by the joining of the first sealant layer and the second sealant layer at the peripheral portion, and has an inner seal portion formed by the joining of the first sealant layer and the second sealant layer inside the peripheral seal portion. The heat exchange flow path is constituted by the peripheral seal portion, the inner seal portion, and the inner surface of the bag body.

5. The heat exchange device according to claim 2, wherein The front sheet and the back sheet each include a metal layer.

6. The heat exchange device according to claim 1 or 2, wherein The plate-like body has a plurality of the first boss portions and a plurality of the second boss portions, and a plurality of the bag bodies are installed on the plate-like body in an isolated and arranged manner.

7. A battery pack, comprising: The heat exchange device according to any one of claims 1 to 6; And A plurality of battery cells, The plurality of battery cells are respectively disposed between the respective bag bodies of the plurality of bag bodies.

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