Heat exchanger, electronic assembly and pressure resistance detection tool

Abstract

The invention relates to the technical field of heat dissipation, and provides a heat exchanger, an electronic assembly and a pressure resistance detection tool, the heat exchanger comprises a substrate and a runner plate, the runner plate comprises a flat plate area and a plurality of arching areas connected with the flat plate area, the flat plate area is fixedly connected with a first surface of the substrate, and a plurality of runners are formed between the plurality of arching areas and the first surface of the substrate; the flow channel is suitable for containing a CO2 medium; wherein the yield strength of materials of the base plate and the runner plate is greater than 90 MPa; the thickness of the substrate is greater than or equal to 1.5 mm; the thickness of the runner plate is greater than or equal to 1.5 mm; the maximum distance between one surface, facing the substrate, of the arched area and the substrate is greater than or equal to 1.5 mm; the projection width of the side, facing the substrate, of the arched area on the substrate is 9-15 mm. According to the heat exchanger provided by the embodiment of the invention, the better heat dissipation requirement can be met while the pressure resistance is ensured.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and in particular to a heat exchanger, an electronic component, and a pressure resistance testing tool. Background Art

[0002] As a natural refrigerant, CO2 has an ozone depletion potential of zero and a global warming potential of one, making it in line with current energy conservation and emission reduction priorities. When used for refrigeration, CO2 transcritical heat exchange systems offer a heat transfer coefficient 2-3 times that of traditional fluorinated refrigerants, making them particularly suitable for power battery applications in cold and high-altitude regions.

[0003] In related technologies, CO2 heat exchangers are commonly used in air conditioning units. For example, they utilize a tube-in-tube structure made of high-strength steel and thick walls. This design allows the outer and inner tubes of the CO2 heat exchanger to be coaxial, ensuring uniform pressure distribution and improving the overall pressure resistance of the CO2 heat exchanger. However, the heat transfer surface of this tube-in-tube structure is relatively small, which does not meet the heat exchange requirements of high-throughput battery pack applications. Summary of the Invention

[0004] The present application provides a heat exchanger, an electronic component, and a pressure testing tool that can meet better heat exchange requirements while ensuring the pressure resistance performance of the radiator.

[0005] A first aspect of the present application provides a heat exchanger, comprising at least:

[0006] A substrate and a flow channel plate, wherein the flow channel plate includes a flat plate area and a plurality of raised areas connected to the flat plate area, the flat plate area is fixedly connected to the first surface of the substrate, and a plurality of flow channels are formed between the plurality of raised areas and the first surface of the substrate, wherein the flow channels are suitable for accommodating a CO2 medium;

[0007] Wherein, the yield strength of the material of the substrate and the flow channel plate is greater than 90 MPa;

[0008] The thickness of the substrate is greater than or equal to 1.5 mm;

[0009] The thickness of the flow channel plate is greater than or equal to 1.5 mm;

[0010] The maximum distance between the side of the arched area facing the substrate and the substrate is greater than or equal to 1.5 mm;

[0011] The projection width of the side of the arched area facing the substrate on the substrate is 9 mm to 15 mm.

[0012] The heat exchanger provided in the embodiment of the present application is designed to include a substrate and a flow channel plate. The flow channel plate includes a flat plate area and multiple arched areas. The multiple arched areas are connected to the flat plate area. The flat plate area is fixedly connected to the first surface of the substrate. Multiple flow channels suitable for accommodating CO2 medium are formed between the multiple arched areas and the first surface of the substrate. By designing the yield strength of the materials of the substrate and the flow channel plate to be greater than 90 MPa, the thickness of the substrate and the thickness of the flow channel plate to be greater than or equal to 1.5 mm, the maximum distance between the side of the arched area facing the substrate and the substrate is designed to be greater than or equal to 1.5 mm, and the projection width of the side of the arched area facing the substrate on the substrate is designed to be 9 mm-15 mm. In this way, the CO2 medium inputs or outputs the flow channel, and the heat exchanger can meet better heat exchange requirements while ensuring the pressure resistance of the radiator when working.

[0013] In one possible implementation, the thickness of the substrate is less than or equal to 2 mm;

[0014] The thickness of the flow channel plate is less than or equal to 2 mm.

[0015] In a possible implementation, a maximum distance between a surface of the arched area facing the substrate and the substrate is less than or equal to 3.5 mm.

[0016] In a possible implementation, the arched area includes a bottom, a first stamping portion, and a second stamping portion that are connected to each other; the first stamping portion is located between the bottom and the second stamping portion;

[0017] The first stamping portion (1222) and the second stamping portion (1223) are both arc-shaped edges, wherein the arc radius of the second stamping portion is 1.5mm-3.5mm.

[0018] In one possible implementation, the central angle corresponding to the arcuate side of the second stamping portion is 32°-60°.

[0019] In a possible implementation, the arc radius of the first stamping portion is calculated based on the arc radius of the second stamping portion, the thickness of the flow channel plate, and the height of the flow channel.

[0020] In one possible implementation, it further includes: a connector, which is fixedly connected to at least one of the base plate and the flow channel plate, and the connector is connected to at least one of the flow channels; the connector is used to allow CO2 medium to enter or exit the flow channel.

[0021] In a possible implementation, the connector includes: a first connector and a second connector connected to each other; the first connector and the second connector are respectively connected to at least one of the flow channels.

[0022] In a possible implementation, one of the first connector and the second connector is an inlet connector, and the other of the first connector and the second connector is an outlet connector;

[0023] The inlet joint includes an inlet for inputting CO2 medium into the flow channel; the outlet joint includes two outlets for outputting CO2 medium out of the flow channel.

[0024] In one possible implementation, the wall thickness of the joint is 4 mm to 6 mm.

[0025] In one possible implementation, the substrate and the flow channel plate are made of any one of aluminum alloy, copper alloy, steel or titanium alloy.

[0026] In a possible implementation, the flat plate area is connected to a surface of the substrate facing the flow channel plate.

[0027] In a possible implementation, the minimum distance between two adjacent arched areas is 3 mm to 12 mm.

[0028] A second aspect of the present application provides an electronic component, comprising a battery component and any of the above-mentioned heat exchangers; a substrate of the heat exchanger is fixedly connected to the battery component to dissipate heat from the battery component.

[0029] The embodiment of the present application can improve the performance of the electronic component by providing the above-mentioned heat exchanger in the electronic component.

[0030] In a possible implementation, a surface of the substrate facing away from the flow channel plate is fixedly connected to the battery assembly via a thermally conductive adhesive.

[0031] A third aspect of the present application provides a pressure test tool for performing a pressure test on any of the above-mentioned heat exchangers, comprising at least: a pressure plate assembly;

[0032] The pressure plate assembly includes a pressure plate, a column on one side of the pressure plate, an air injection hole on the other side of the pressure plate, the column is connected to the air injection hole, and the column is connected to the joint of the heat exchanger.

[0033] The pressure test fixture provided in the embodiments of the present application connects the columns on the pressure plate to the joints of the heat exchanger, which in turn connects the columns to the air injection holes. Gas is then injected into the heat exchanger through the air injection holes to measure the deformation of the flow channel in the heat exchanger, thereby determining whether the heat exchanger meets the pressure resistance performance requirements. The heat exchanger provided in the embodiments of the present application is capable of performing pressure resistance testing on the heat exchanger.

[0034] In one possible implementation, it further includes: a sealing assembly; the sealing assembly includes: a sealing gasket and a sealing sleeve; the end of the column away from the air injection hole is in contact with the sealing gasket, and the sealing sleeve is sleeved on the outer circumference of the column and the sealing gasket.

[0035] In one possible implementation, the wall thickness of the pressing plate is 4 mm to 6 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0037] Figure 1 A schematic diagram of the planar structure of a heat exchanger provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the disassembled structure of the heat exchanger provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of a portion of the structure of a heat exchanger provided in an embodiment of the present application;

[0040] Figure 4 for Figure 3 A magnified schematic diagram of point A;

[0041] Figure 5 A schematic structural diagram of a flow channel plate and a base plate in a heat exchanger provided in an embodiment of the present application;

[0042] Figure 6 Another structural schematic diagram of the flow channel plate and base plate in the heat exchanger provided in an embodiment of the present application;

[0043] Figure 7 This is another structural schematic diagram of the flow channel plate and base plate in the heat exchanger provided in an embodiment of the present application;

[0044] Figure 8 A schematic diagram of the structure of a joint in a heat exchanger provided in an embodiment of the present application;

[0045] Figure 9 A schematic diagram of the structure of the electronic components provided in an embodiment of the present application;

[0046] Figure 10 A schematic diagram of the structure of the pressure resistance testing tooling provided in an embodiment of the present application.

[0047] Reference numerals:

[0048] 100-heat exchanger;

[0049] 110-Substrate;

[0050] 111-first side; 112-second side;

[0051] 120-flow channel plate;

[0052] 121- flat area;

[0053] 122-arched area; 1221-bottom; 1222-first stamping portion; 1223-second stamping portion;

[0054] 123-flow channel;

[0055] 130-connector;

[0056] 131-first connector; 132-second connector; 133-inlet; 134-outlet;

[0057] 200-electronic components;

[0058] 210-battery assembly;

[0059] 300-pressure test tooling;

[0060] 310-pressing plate assembly; 311-pressing plate; 312-column; 313-air injection hole;

[0061] 320-sealing assembly; 321-sealing gasket; 322-sealing sleeve. DETAILED DESCRIPTION

[0062] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0063] As a natural refrigerant, CO2 is gradually being used in the field of refrigeration. When CO2 transcritical heat exchange systems are used in refrigeration, their energy efficiency ratio (COP=2~4) is similar to that of R134a (COP=3~6). When used in heating systems, CO2 heat pumps perform better, with a heat transfer coefficient of approximately 4~6KW / (m 2 ×K), which is 2 to 3 times that of traditional fluorine-containing refrigerants and is more suitable for the use of power batteries in high-altitude and cold areas.

[0064] However, CO2 heat exchange systems require higher operating pressures than conventional refrigerants, and conventional battery pack coolers are less robust than those designed to meet these high-pressure safety requirements. Furthermore, the specific implementation of the battery pack heat exchanger requires consideration of its heat transfer performance, cost-effectiveness, manufacturability, and assemblability, requiring the safe margins of its design parameters to guide production.

[0065] Existing CO2 transcritical heat exchangers are mostly used in air conditioning units. These technologies typically employ a tube-in-tube structure made of high-strength steel and thick walls. This design allows the outer and inner tubes to be coaxial, ensuring uniform pressure distribution and improving overall pressure resistance.

[0066] However, this shell-and-tube structure has a relatively small heat transfer surface, making it unsuitable for the high-throughput heat exchange requirements of battery packs. Furthermore, the fluid flow along this cooler is long, making it difficult to maintain uniform temperature distribution. Furthermore, the shell-and-tube cooler's complex manufacturing process and structure make it difficult to produce. Furthermore, it requires more pipe connections and installation space, making it unsuitable for integrated battery pack designs.

[0067] To solve the above problems, an embodiment of the present application provides a new heat exchanger and an electronic component having the heat exchanger. The heat exchanger includes a substrate and a flow channel plate. The flow channel plate includes a flat plate area and multiple arched areas connected to the flat plate area. The flat plate area is fixedly connected to the first surface of the substrate, and multiple flow channels are formed between the multiple arched areas and the first surface of the substrate. The flow channels are suitable for accommodating CO2 medium. The yield strength of the materials of the substrate and the flow channel plate is greater than 90MPa. The thickness of the substrate is greater than or equal to 1.5mm. The thickness of the flow channel plate is greater than or equal to 1.5mm. The maximum distance between the side of the arched area facing the substrate and the substrate is greater than or equal to 1.5mm. The projection width of the side of the arched area facing the substrate on the substrate is 9mm-15mm. The heat exchanger provided by the embodiment of the present application can meet good heat dissipation requirements while ensuring pressure resistance.

[0068] The heat exchanger provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0069] Figure 1 A schematic diagram of the planar structure of the heat exchanger provided in an embodiment of the present application. Figure 2 Schematic diagram of the disassembled structure of the heat exchanger provided in an embodiment of the present application. Figure 3 A schematic diagram of the partial structure of the heat exchanger provided in an embodiment of the present application. Figure 4 for Figure 3 A magnified schematic diagram of .

[0070] The present application embodiment provides a heat exchanger, such as Figure 1 and Figure 2As shown, the heat exchanger 100 provided in the embodiment of the present application may include a base plate 110 and a flow channel plate 120, wherein, see Figure 3 and Figure 4 As shown, the substrate 110 may include a first surface 111 and a second surface 112 opposite to each other, and the second surface 112 of the substrate 110 is used for being fixedly connected to the battery assembly.

[0071] Specifically, in a possible implementation, the second surface 112 of the substrate 110 may be attached to the upper surface of the battery assembly to complete the heat exchange between the evaporation heat absorption of the refrigerant and the heat generation of the battery assembly.

[0072] Reference Figure 3 and Figure 4 As shown, in the embodiment of the present application, the flow channel plate 120 may include a flat plate area 121 and a plurality of arched areas 122, wherein the plurality of arched areas 122 are connected to the flat plate area 121, the flat plate area 121 is fixedly connected to the first surface 111 of the substrate 110, and a plurality of flow channels 123 are formed between the plurality of arched areas 122 and the first surface 111 of the substrate 110, and the flow channels 123 are suitable for accommodating CO2 medium.

[0073] In one possible implementation, the arched area 122 on the flow channel plate 120 may be formed by a stamping process, or may be formed by precision machining. Alternatively, the flow channel plate 120 may be formed with an extruded flow channel 123 .

[0074] In the embodiment of the present application, the yield strength of the material of the substrate 110 and the flow channel plate 120 can be greater than 90 MPa. For example, the yield strength of the material of the substrate 110 and the flow channel plate 120 can be 95 MPa, 100 MPa, 105 MPa, 110 MPa, 115 MPa, 120 MPa, 125 MPa, 130 MPa, 135 MPa, 140 MPa, 145 MPa, or 150 MPa, etc. The embodiment of the present application is not limited to this and is not limited to the above examples.

[0075] It should be noted here that the numerical values and numerical ranges involved in this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors. Those skilled in the art may consider this part of the error to be negligible.

[0076] In an embodiment of the present application, the thickness L2 of the substrate 110 may be greater than or equal to 1.5 mm. For example, the thickness L2 of the substrate 110 may be 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm or 2.5 mm, etc. The embodiment of the present application is not limited to this and is not limited to the above examples.

[0077] The thickness L1 of the flow channel plate 120 can be greater than or equal to 1.5 mm. For example, the thickness L1 of the flow channel plate 120 can be 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm or 2.5 mm, etc. The embodiments of the present application are not limited to this and are not limited to the above examples.

[0078] Figure 5 A schematic structural diagram of the flow channel plate and base plate in the heat exchanger provided in an embodiment of the present application. Figure 6 Another structural schematic diagram of the flow channel plate and base plate in the heat exchanger provided in an embodiment of the present application. Figure 7 This is another structural schematic diagram of the flow channel plate and base plate in the heat exchanger provided in an embodiment of the present application.

[0079] See also Figure 5 and Figure 6 As shown, in the embodiment of the present application, the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110 can be greater than or equal to 1.5 mm. By designing the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110, that is, the maximum height of the flow channel 123, it is possible to reduce flow resistance losses while ensuring the flow rate of the flow channel 123.

[0080] In the embodiment of the present application, for example, the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110 can be 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm or 3 mm, etc. The embodiment of the present application is not limited to this, nor is it limited to the above examples.

[0081] In the examples of this application, see Figure 6 and Figure 7 As shown, the projected width W1 of the side of the arched area 122 facing the substrate 110 on the substrate 110 can be 9 mm to 15 mm. In other words, the width of the arched area 122 at the portion of the flow channel plate 120 where it contacts the substrate 110 can be 9 mm to 15 mm. The projected width W1 of 9 mm to 15 mm means that the projected width W1 is greater than or equal to 9 mm and less than or equal to 15 mm.

[0082] By designing the projection width W1 of the surface of the arched area 122 facing the substrate 110 on the substrate 110 , ie, the width of the flow channel 123 , the smoothness of the flow channel 123 and thus the flow rate of the flow channel 123 can be ensured.

[0083] For example, the projection width W1 of the side of the arched area 122 facing the substrate 110 on the substrate 110 can be 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm or 15 mm, etc. The embodiments of the present application are not limited to this and are not limited to the above examples.

[0084] The heat exchanger is designed to include a substrate and a flow channel plate. The flow channel plate includes a flat plate area and multiple arched areas. The multiple arched areas are connected to the flat plate area. The flat plate area is fixedly connected to the first surface of the substrate. Multiple flow channels suitable for accommodating CO2 medium are formed between the multiple arched areas and the first surface of the substrate. By designing the yield strength of the materials of the substrate and the flow channel plate to be greater than 90 MPa, the thickness of the substrate and the flow channel plate to be greater than or equal to 1.5 mm, the maximum distance between the side of the arched area facing the substrate and the substrate is designed to be greater than or equal to 1.5 mm, and the projection width of the side of the arched area facing the substrate on the substrate is designed to be 9 mm-15 mm. In this way, when the CO2 medium inputs or outputs the flow channel and the heat exchanger works, the heat exchanger has a high burst strength, so that the heat exchanger can meet better heat exchange requirements while ensuring the pressure resistance performance of the radiator.

[0085] In an embodiment of the present application, the thickness L2 of the substrate 110 may be less than or equal to 2 mm. For example, the thickness L2 of the substrate 110 may be 1.95 mm, 1.9 mm, 1.85 mm, 1.8 mm, 1.75 mm, 1.7 mm, 1.65 mm, 1.6 mm or 1.55 mm, etc. The embodiment of the present application is not limited to this, nor is it limited to the above examples.

[0086] The thickness L1 of the flow channel plate 120 can be less than or equal to 2 mm. For example, the thickness L1 of the flow channel plate 120 can be 1.95 mm, 1.9 mm, 1.85 mm, 1.8 mm, 1.75 mm, 1.7 mm, 1.65 mm, 1.6 mm or 1.55 mm, etc. The embodiments of the present application are not limited to this and are not limited to the above examples.

[0087] In the above embodiment, the thickness L2 of the substrate 110 can be less than or equal to 2 mm, and the thickness L1 of the flow channel plate 120 can be less than or equal to 2 mm, so as to achieve lightweighting of the heat exchanger and reduce the weight of the heat exchanger.

[0088] In the embodiment of the present application, the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110 can be less than or equal to 3.5 mm. By further limiting the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110, that is, the maximum height of the flow channel 123, the difficulty of the molding process can be reduced and the adaptability can be improved.

[0089] In the embodiment of the present application, for example, the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110 can be 3.4 mm, 3.3 mm, 3.2 mm, 3.1 mm, 3 mm, 2.9 mm, 2.8 mm, 2.7 mm or 2.6 mm, etc. The embodiment of the present application is not limited to this, nor is it limited to the above examples.

[0090] In the embodiments of this application, Figure 5 and Figure 7 As shown, the arched area 122 may include a bottom 1221 , a first stamping portion 1222 and a second stamping portion 1223 that are connected to each other, wherein the first stamping portion 1222 is located between the bottom 1221 and the second stamping portion 1223 .

[0091] It is understood that the arched area 122 is generally formed integrally through a stamping process. During the stamping process, the flow channel plate 120 is formed with a bottom 1221, a first stamping portion 1222, and a second stamping portion 1223 connected to each other. The bottom 1221, the first stamping portion 1222, and the second stamping portion 1223 together constitute the arched area 122. The first stamping portion 1222 and the second stamping portion 1223 both have curved edges.

[0092] In the embodiment of the present application, the radius R1 of the second stamping portion 1223 can be 1.5 mm to 3.5 mm. For example, the radius R1 of the second stamping portion 1223 can be 1.5 mm, 2 mm, 2.5 mm, 3 mm, or 3.5 mm, etc. The embodiment of the present application is not limited to this, nor is it limited to the above examples. By designing the radius R1 of the second stamping portion 1223, the difficulty of the molding process can be reduced and the adaptability can be improved.

[0093] In the embodiment of the present application, the central angle θ corresponding to the curved side of the second stamping portion 1223 is 32°-60°. For example, the central angle θ corresponding to the curved side of the second stamping portion 1223 can be 32°, 38°, 44°, 50°, or 60°, etc., and the embodiment of the present application is not limited to this, nor is it limited to the above examples. By designing the central angle θ corresponding to the curved side of the second stamping portion 1223, the difficulty of the molding process can be reduced and the adaptability can be improved.

[0094] In addition, it should be noted that, in the embodiment of the present application, the arc radius R2 of the first stamping portion 1222 can be calculated based on the arc radius R1 of the second stamping portion 1223 , the thickness L1 of the flow channel plate 120 , and the height H of the flow channel 123 .

[0095] When measuring the arc radius R1 of the second stamping part 1223, the angle θ between the arc radius of the second stamping part 1223 and the height of the flow channel 123, and the arc radius R2 of the first stamping part 1222, a three-dimensional coordinate measuring machine (CMM) can be used to establish a virtual coordinate system, and then the XYZ coordinate data of different points on the surface of the heat exchanger can be obtained through the measuring probe, and then R1, R2, and the corresponding angle relationship can be obtained by calculating the spatial relationship between different measurement points.

[0096] Defining the size of the flow channel 123 of the heat exchanger 100 helps to further improve the overall pressure resistance of the heat exchanger 100.

[0097] In an embodiment of the present application, the heat exchanger 100 may further include a joint 130, which is fixedly connected to at least one of the substrate 110 and the flow channel plate 120. Specifically, the joint 130 may be fixedly connected to the substrate 110, or the joint 130 may be fixedly connected to the flow channel plate 120, or the joint 130 may be fixedly connected to the substrate 110 and the flow channel plate 120.

[0098] Moreover, the connector 130 is in communication with at least one flow channel 123 , wherein the connector 130 can allow the CO 2 medium to be input into or output from the flow channel 123 .

[0099] It should be noted that in the embodiment of the present application, the shape of the flow channel 123 can be a straight tube structure, a spiral tube structure, a corrugated tube structure or a multi-channel tube, etc. The embodiment of the present application is not limited to this, nor is it limited to the above examples.

[0100] The CO2 medium is input into or output from the flow channel 123 through the joint 130, and the heat exchanger 100 works. The heat exchanger 100 can meet better heat exchange requirements while ensuring the pressure resistance performance of the radiator.

[0101] It is understandable that in actual application scenarios, compared with the heat exchanger 100 at the air-conditioning end, the heat exchanger 100 used in the vehicle battery pack occupies a smaller overall space.

[0102] In addition, it can be understood that in the embodiment of the present application, the fluid pipelines of the heat exchanger 100 and the joint 130 can be designed to be smaller to meet the requirements of withstanding higher pressures.

[0103] Figure 8 This is a schematic diagram of the structure of the joint in the heat exchanger provided in an embodiment of the present application.

[0104] See also Figure 8As shown, in the embodiment of the present application, the joint 130 may include a first joint 131 and a second joint 132, wherein the first joint 131 and the second joint 132 are respectively connected to at least one flow channel 123, and the first joint 131 and the second joint 132 may be a split structure. By designing the joint 130 as a split structure, the manufacturing feasibility of the joint 130 can be improved.

[0105] In one possible implementation, the first joint 131 and the second joint 132 may be welded in a split manner.

[0106] Specifically, in the embodiment of the present application, one of the first connector 131 and the second connector 132 is an inlet connector, and the other of the first connector 131 and the second connector 132 is an outlet connector. For example, Figure 8 In the embodiment, the first connector 131 is an inlet connector, and the second connector 132 is an outlet connector.

[0107] In the embodiment of the present application, the inlet connector may include an inlet 133 for the CO2 medium input flow channel 123, and the outlet connector may include two outlets 134 for the CO2 medium output flow channel 123. By designing the connector 130 as one inlet 133 and two outlets 134, the pressure drop requirement of the heat exchanger 100 can be met.

[0108] In the embodiment of the present application, the material of the substrate 110 and the flow channel plate 120 can be any one of aluminum alloy, copper alloy, steel or titanium alloy.

[0109] In the embodiment of the present application, the wall thickness of the joint 130 can be 4 mm to 6 mm. By designing the wall thickness of the joint 130, the compressive strength requirement of the joint 130 can be met.

[0110] For example, the wall thickness of the joint 130 may be 4 mm, 4.5 mm, 5 mm, 5.5 mm, or 6 mm, etc., and the embodiments of the present application are not limited to this, nor are they limited to the above examples.

[0111] In the embodiment of the present application, the flat plate area 121 and the surface of the substrate 110 facing the flow channel plate 120 can be connected by welding. For example, the flat plate area 121 and the surface of the substrate 110 facing the flow channel plate 120 can be connected by brazing or laser welding.

[0112] In the embodiment of the present application, the minimum distance L3 between two adjacent arched areas 122 may be 3 mm to 12 mm, so as to meet the welding strength between the base plate 110 and the flow channel plate 120 .

[0113] The welding width L3 between the flat plate area 121 and the substrate 110 can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm or 12 mm, etc., which is not limited to the above examples in the embodiments of the present application.

[0114] In addition, it is understandable that in the embodiment of the present application, a reinforcement ring, a support frame or other structural reinforcement devices can be installed outside the flow channel 123 to enhance the overall structural performance of the heat exchanger 100.

[0115] Figure 9 A schematic diagram of the structure of the electronic components provided in an embodiment of the present application.

[0116] The present application also provides an electronic component, specifically, Figure 9 As shown, the electronic component 200 may include a battery component 210 and the above-mentioned heat exchanger 100 , wherein the substrate 110 of the heat exchanger 100 is fixedly connected to the battery component 210 to dissipate heat from the battery component 210 .

[0117] In the embodiment of the present application, the side of the substrate 110 facing away from the flow channel plate 120 and the battery assembly 210 may be fixedly connected by thermally conductive adhesive.

[0118] Figure 10 A schematic diagram of the structure of the pressure resistance testing tooling provided in an embodiment of the present application.

[0119] The present application also provides a pressure test tool, specifically, as Figure 10 As shown, the pressure resistance testing tool 300 is used to perform pressure resistance testing on the above-mentioned heat exchanger 100. The pressure resistance testing tool 300 can at least include a pressure plate assembly 310, wherein the pressure plate assembly 310 can include: a pressure plate 311, a column 312 on one side of the pressure plate 311, and an air injection hole 313 on the other side of the pressure plate 311, the column 312 is connected to the air injection hole 313, and the column 312 is connected to the joint 130 of the heat exchanger 100.

[0120] It can be understood that in the embodiment of the present application, the pressure plate 311 and the joint 130 can be fixed by bolts.

[0121] In the embodiment of the present application, the pressure resistance testing tool 300 may further include a sealing assembly 320, which may include a sealing gasket 321 and a sealing sleeve 322. The end of the column 312 facing away from the gas injection hole 313 is in contact with the sealing gasket 321, and the sealing sleeve 322 is sleeved around the outer periphery of the column 312 and the sealing gasket 321. In this way, the pressure plate 311 and the joint 130 can be sealed by the sealing sleeve 322 and the sealing gasket 321.

[0122] In the embodiment of the present application, the wall thickness of the pressure plate 311 may be 4 mm to 6 mm, which can ensure the safety of the pressure test.

[0123] Specifically, in the embodiment of the present application, the wall thickness of the pressure plate 311 can be 4 mm, 4.5 mm, 5 mm, 5.5 mm or 6 mm, etc. The embodiment of the present application is not limited to this, nor is it limited to the above examples.

[0124] The present application also provides a burst test method. For example, using the aforementioned pressure test fixture 300 to test the burst performance of a heat exchanger 100, CO2 is injected into the heat exchanger 100 at a rate of 1 MPa / min and pressurized to a certain standard value or until it ruptures. The pressure-time curve is recorded, and the rupture location of the flow channel plate 120 or the base plate 110 is recorded. In some embodiments, the pressure is , hydraulic oil, or water.

[0125] In addition, a certain mass flow rate of CO2 is introduced into the heat exchanger 100, and the pressure difference between the inlet and outlet is measured by a pressure sensor to obtain the pressure drop. In addition, an electronic scale with a 5g scale can be used to measure the weight of the CO2.

[0126] The technical solutions of the embodiments of the present application are further explained below with reference to specific embodiments.

[0127] Example 1

[0128] In this embodiment, the coolant in the heat exchanger 100 is CO2, the yield strength of the material of the substrate 110 and the flow channel plate 120 is 110 MPa, the thickness of the substrate 110 and the flow channel plate 120 is 1.9 mm, the maximum distance H between the surface of the arched area 122 facing the substrate 110 and the substrate 110 is 1.8 mm, the projection width W1 of the surface of the arched area 122 facing the substrate 110 on the substrate 110 is 9.5 mm, the arc radius R1 of the second stamping portion 1223 is 2.5 mm, and the angle θ between the arc radius of the second stamping portion 1223 and the height of the flow channel 123 is 44°.

[0129] Example 2

[0130] The difference between Example 2 and Example 1 is that the yield strength of the material of the substrate 110 and the flow channel plate 120 is 140 MPa, and the other process parameters are the same as those of Example 1.

[0131] Example 3

[0132] The difference between Example 3 and Example 1 is that the yield strength of the material of the substrate 110 and the flow channel plate 120 is 170 MPa, and the other process parameters are the same as those of Example 1.

[0133] Example 4

[0134] In this embodiment, the coolant in the heat exchanger 100 is CO2, the yield strength of the material of the substrate 110 and the flow channel plate 120 is 130 MPa, the thickness of the substrate 110 and the flow channel plate 120 is 1.5 mm, the maximum distance H between the surface of the arched area 122 facing the substrate 110 and the substrate 110 is 1.6 mm, the projection width W1 of the surface of the arched area 122 facing the substrate 110 on the substrate 110 is 9 mm, the arc radius R1 of the second stamping portion 1223 is 2 mm, and the angle θ between the arc radius of the second stamping portion 1223 and the height of the flow channel 123 is 41°.

[0135] Example 5

[0136] The difference between Example 5 and Example 4 is that the thickness of the substrate 110 and the flow channel plate 120 is 1.8 mm, and the other process parameters are the same as those of Example 4.

[0137] Example 6

[0138] The difference between Example 6 and Example 4 is that the thickness of the substrate 110 and the flow channel plate 120 is 2 mm, and the other process parameters are the same as those of Example 4.

[0139] Example 7

[0140] In this embodiment, the coolant in the heat exchanger 100 is CO2, the yield strength of the material of the substrate 110 and the flow channel plate 120 is 160 MPa, the thickness of the substrate 110 and the flow channel plate 120 is 1.8 mm, the maximum distance H between the surface of the arched area 122 facing the substrate 110 and the substrate 110 is 1.5 mm, the projection width W1 of the surface of the arched area 122 facing the substrate 110 on the substrate 110 is 11 mm, the arc radius R1 of the second stamping portion 1223 is 3.5 mm, and the angle θ between the arc radius of the second stamping portion 1223 and the height of the flow channel 123 is 64°.

[0141] Example 8

[0142] The difference between Example 8 and Example 7 is that the maximum distance H between the surface of the arched area 122 facing the substrate 110 and the substrate 110 is 2.8 mm, and the other process parameters are the same as those of Example 7.

[0143] Example 9

[0144] The difference between Example 9 and Example 7 is that the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110 is 3.5 mm, the angle θ between the arc radius of the second stamping portion 1223 and the height of the flow channel 123 is 37°, and the other process parameters are the same as those of Example 7.

[0145] Example 10

[0146] In this embodiment, the coolant in the heat exchanger 100 is CO2, the yield strength of the material of the substrate 110 and the flow channel plate 120 is 165 MPa, the thickness of the substrate 110 and the flow channel plate 120 is 2 mm, the maximum distance H between the surface of the arched area 122 facing the substrate 110 and the substrate 110 is 1.5 mm, the projection width W1 of the surface of the arched area 122 facing the substrate 110 on the substrate 110 is 9 mm, the arc radius R1 of the second stamping portion 1223 is 3 mm, and the angle θ between the arc radius of the second stamping portion 1223 and the height of the flow channel 123 is 33°.

[0147] Example 11

[0148] The difference between Example 11 and Example 10 is that the projection width W1 of the surface of the arched area 122 facing the substrate 110 on the substrate 110 is 12 mm, and the other process parameters are the same as those of Example 10.

[0149] Example 12

[0150] The difference between Example 12 and Example 10 is that the projection width W1 of the surface of the arched area 122 facing the substrate 110 on the substrate 110 is 15 mm, and the other process parameters are the same as those of Example 10.

[0151] Example 13

[0152] The difference between Example 13 and Example 4 is that the thickness of the substrate 110 and the flow channel plate 120 is 2.1 mm, and the other process parameters are the same as those of Example 4.

[0153] Comparative Example 1

[0154] In this comparative example, the coolant in the heat exchanger 100 is CO2, the yield strength of the material of the substrate 110 and the flow channel plate 120 is 90 MPa, the thickness of the substrate 110 and the flow channel plate 120 is 1.9 mm, the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110 is 1.8 mm, the projection width W1 of the side of the arched area 122 facing the substrate 110 on the substrate 110 is 9.5 mm, the arc radius R1 of the second stamping portion 1223 is 2.5 mm, and the angle θ between the arc radius of the second stamping portion 1223 and the height of the flow channel 123 is 44°.

[0155] Comparative Example 2

[0156] In this comparative example, the coolant in the heat exchanger 100 is CO2, the yield strength of the material of the substrate 110 and the flow channel plate 120 is 130 MPa, the thickness of the substrate 110 and the flow channel plate 120 is 1.4 mm, the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110 is 1.6 mm, the projection width W1 of the side of the arched area 122 facing the substrate 110 on the substrate 110 is 9 mm, the arc radius R1 of the second stamping portion 1223 is 2 mm, and the angle θ between the arc radius of the second stamping portion 1223 and the height of the flow channel 123 is 41°.

[0157] Comparative Example 3

[0158] In this comparative example, the coolant in the heat exchanger 100 is CO2, the yield strength of the material of the substrate 110 and the flow channel plate 120 is 160 MPa, the thickness of the substrate 110 and the flow channel plate 120 is 1.8 mm, the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110 is 1.4 mm, the projection width W1 of the side of the arched area 122 facing the substrate 110 on the substrate 110 is 11 mm, the arc radius R1 of the second stamping portion 1223 is 3.5 mm, and the angle θ between the arc radius of the second stamping portion 1223 and the height of the flow channel 123 is 37°.

[0159] Comparative Example 4

[0160] In this comparative example, the coolant in the heat exchanger 100 is CO2, the yield strength of the material of the substrate 110 and the flow channel plate 120 is 165 MPa, the thickness of the substrate 110 and the flow channel plate 120 is 2 mm, the maximum distance H between the side of the arched area 122 facing the substrate 110 and the substrate 110 is 1.5 mm, the projection width W1 of the side of the arched area 122 facing the substrate 110 on the substrate 110 is 8.5 mm, the arc radius R1 of the second stamping portion 1223 is 3 mm, and the angle θ between the arc radius of the second stamping portion 1223 and the height of the flow channel 123 is 33°.

[0161] Comparative Example 5

[0162] The difference between Comparative Example 5 and Comparative Example 4 is that the projection width W1 of the surface of the arched area 122 facing the substrate 110 on the substrate 110 is 16 mm, and the other process parameters are the same as those of Comparative Example 4.

[0163] The following tests were performed on the heat exchangers 100 in Examples 1-13 and Comparative Examples 1-5:

[0164] 1. Burst Test: Infuse heat exchanger 100 with CO2 at a rate of 1 MPa / min, pressurize to 34 MPa, and observe whether the heat exchanger 100 ruptures. Simultaneously record the pressure-time curve and the rupture location of the flow channel plate 120 or base plate 110. (The medium for the burst test can be replaced with helium, hydraulic oil, or water.)

[0165] 2. Pressure drop test: A certain mass flow rate of CO2 coolant is passed through the heat exchanger 100, and the pressure difference between the inlet and outlet is measured using a pressure sensor.

[0166] 3. Weight test: Use an electronic scale with a graduation of 5g to measure the weight of 100g of the heat exchanger.

[0167] Based on the above test method, the test results of the heat exchanger 100 in Examples 1-12 and Comparative Examples 1-7 are as follows:

[0168]

[0169]

[0170] According to the above table, by comparing Experimental Examples 1-13 with Comparative Examples 1-5, it can be seen that when the yield strength of the materials of the substrate 110 and the flow channel plate 120 is greater than 110, the thickness of the substrate and the flow channel plate is greater than or equal to 1.5 mm, the maximum distance between the side of the arched area facing the substrate and the substrate is greater than or equal to 1.5 mm, and the projection width of the side of the arched area facing the substrate on the substrate is 9 mm to 15 mm, the heat exchanger will not have the risk of explosion and the impact on the inlet and outlet pressure difference of the heat exchanger 100 is relatively small.

[0171] Specifically, if the pressure drop is too large, that is, the pressure drop is greater than or equal to 150KPa, it will affect the flow rate and flow of the fluid, resulting in a decrease in heat exchange efficiency, which in turn affects the temperature management of the battery pack and is not conducive to the temperature uniformity of the battery pack; in addition, if the pressure drop of the cold plate is too large, the cooling medium will consume more energy during operation, which is less economical.

[0172] According to the table above, comparing Experimental Examples 4-6 with Example 13, it can be seen that when the thickness of the base plate and the flow channel plate is greater than 2 mm, the weight of the heat exchanger 100 increases, which is not conducive to the lightweight design of the heat exchanger. Therefore, when the thickness of the base plate and the flow channel plate is less than or equal to 2 mm, the heat exchanger can be further reduced in weight while maintaining the compressive strength and heat transfer efficiency of the heat exchanger, thereby achieving a lightweight heat exchanger.

[0173] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0174] In the description of the present invention, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0175] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," etc. should be interpreted broadly. For example, they may refer to fixed or removable connections, or integration. They may be directly connected or indirectly connected through an intermediate medium. They may also refer to internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances. Furthermore, the terms "first," "second," etc., etc., are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated.

[0176] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat exchanger (100), characterized in that: At least: A substrate (110) and a flow channel plate (120); the flow channel plate (120) comprises a flat plate area (121) and a plurality of arched areas (122) connected to the flat plate area (121); the flat plate area (121) is fixedly connected to the first surface of the substrate (110); and a plurality of flow channels (123) are formed between the plurality of arched areas (122) and the first surface of the substrate (110); the flow channels are suitable for accommodating a CO2 medium; Wherein, the yield strength of the material of the substrate and the flow channel plate is greater than 90 MPa; The thickness of the substrate is greater than or equal to 1.5 mm; The thickness of the flow channel plate is greater than or equal to 1.5 mm; The maximum distance between the side of the arched area facing the substrate and the substrate is greater than or equal to 1.5 mm; The projection width of the side of the arched area facing the substrate on the substrate is 9 mm to 15 mm.

2. The heat exchanger (100) according to claim 1, characterized in that The thickness of the substrate is less than or equal to 2 mm; The thickness of the flow channel plate is less than or equal to 2 mm.

3. The heat exchanger (100) according to claim 1, characterized in that A maximum distance between a surface of the arched area facing the substrate and the substrate is less than or equal to 3.5 mm.

4. The heat exchanger (100) according to claim 1, characterized in that The arched area (122) comprises a bottom (1221), a first stamping portion (1222), and a second stamping portion (1223) which are connected to each other; the first stamping portion (1222) is located between the bottom (1221) and the second stamping portion (1223); The first stamping portion (1222) and the second stamping portion (1223) are both arc-shaped edges, wherein the arc radius of the second stamping portion (1223) is 1.5 mm-3.5 mm.

5. The heat exchanger (100) according to claim 4, characterized in that The central angle corresponding to the arc-shaped side of the second stamping portion is 32°-60°.

6. The heat exchanger (100) according to claim 4, characterized in that The arc radius of the first stamping portion is calculated according to the arc radius of the second stamping portion, the thickness of the flow channel plate, and the height of the flow channel.

7. The heat exchanger (100) according to any one of claims 1 to 6, characterized in that: The invention also includes: a joint (130), wherein the joint (130) is fixedly connected to at least one of the substrate (110) and the flow channel plate (120), and the joint (130) is connected to at least one of the flow channels (123); the joint (130) can allow CO2 medium to be input into or output from the flow channel (123).

8. The heat exchanger (100) according to claim 7, characterized in that The connector (130) includes: a first connector (131) and a second connector (132) connected to each other; the first connector (131) and the second connector (132) are respectively connected to at least one of the flow channels (123).

9. The heat exchanger (100) according to claim 8, characterized in that One of the first connector and the second connector is an inlet connector, and the other of the first connector and the second connector is an outlet connector; The inlet joint includes an inlet for inputting CO2 medium into the flow channel; the outlet joint includes two outlets for outputting CO2 medium out of the flow channel.

10. The heat exchanger (100) according to claim 8 or 9, characterized in that The wall thickness of the joint is 4mm-6mm.

11. The heat exchanger (100) according to any one of claims 1 to 6, characterized in that: The substrate and the flow channel plate are made of any one of aluminum alloy, copper alloy, steel or titanium alloy.

12. The heat exchanger (100) according to any one of claims 1 to 6, characterized in that: The flat plate area is connected to a surface of the substrate facing the flow channel plate.

13. The heat exchanger (100) according to claim 12, characterized in that The minimum distance between two adjacent arched areas is 3 mm to 12 mm.

14. An electronic component (200), comprising a battery component (210) and a heat exchanger (100) according to any one of claims 1 to 13; a substrate (110) of the heat exchanger (100) is fixedly connected to the battery component (210) to dissipate heat from the battery component (210).

15. The electronic component (200) according to claim 14, characterized in that The side of the substrate facing away from the flow channel plate is fixedly connected to the battery assembly via heat-conducting glue.

16. A pressure test tool (300) for performing pressure test on the heat exchanger (100) according to any one of claims 1 to 13, characterized in that: At least: a pressure plate assembly (310); The pressure plate assembly (310) comprises: a pressure plate (311), a column (312) on one side of the pressure plate (311), an air injection hole (313) on the other side of the pressure plate (311), the column (312) being connected to the air injection hole (313), and the column (312) being connected to the joint (130) of the heat exchanger (100).

17. The pressure resistance testing tool (300) according to claim 16, characterized in that: Also includes: A sealing assembly (320); the sealing assembly (320) comprises: a sealing gasket (321) and a sealing sleeve (322); One end of the column (312) away from the air injection hole (313) is in contact with the sealing gasket (321), and the sealing sleeve (322) is sleeved on the outer periphery of the column (312) and the sealing gasket (321).

18. The pressure test tool (300) according to claim 16, characterized in that: The wall thickness of the pressing plate is 4mm-6mm.

Images