Heat exchange device, battery pack and electric equipment

Abstract

The invention provides a heat exchange device, a battery pack and electric equipment. The heat exchange device is used for conducting heat exchange on a battery module, and the battery module comprises at least two battery packs which are arranged in a stacked mode. The heat exchange device comprises a heat exchange plate, a direct cooling flow channel is formed in the heat exchange plate, and the direct cooling flow channel is suitable for being communicated with an air conditioning system of the electric equipment so that a refrigerant can circulate. Wherein the heat exchange plate is arranged between any two adjacent battery packs and is attached to the two battery packs. The structure of the heat exchange device can be simplified, and the production cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage, and in particular to a heat exchange device, a battery pack, and electrical equipment. Background Art

[0002] In recent years, with the increasing demand for high-energy-density and high-power-density batteries from new energy vehicles and energy storage systems, large cylindrical cells have gradually become one of the mainstream technology routes for power batteries due to their advantages of high energy density, low cost, and high consistency.

[0003] In related technologies, a battery pack typically includes a battery module and a heat exchange device. The battery module typically comprises at least two stacked battery packs, each of which includes multiple cylindrical cells. The heat exchange device is typically a serpentine heat exchange tube that covers the periphery of each battery pack.

[0004] However, the above heat exchange device has the disadvantages of being relatively complex in structure and having high production cost. Summary of the Invention

[0005] The embodiments of the present application provide a heat exchange device, a battery pack, and an electrical device, which can simplify the structure of the heat exchange device and reduce production costs.

[0006] In a first aspect, an embodiment of the present application provides a heat exchange device for exchanging heat for a battery module, wherein the battery module comprises at least two battery packs stacked together;

[0007] The heat exchange device includes a heat exchange plate, in which a direct cooling flow channel is formed. The direct cooling flow channel is suitable for connecting with the air-conditioning system of the electrical equipment to allow the refrigerant to circulate; wherein the heat exchange plate is arranged between any two adjacent battery packs and is respectively attached to the two battery packs.

[0008] In a possible embodiment, along the stacking direction of the at least two battery packs, the heat exchange plate includes a first surface and a second surface that are oppositely disposed;

[0009] The first surface is provided with a plurality of first recessed areas arranged along a first direction, and the second surface is provided with a plurality of second recessed areas arranged along the first direction;

[0010] Any adjacent first recessed areas and second recessed areas are staggered so that the first recessed areas and the second recessed areas are respectively fitted with a corresponding cylindrical battery cell in the battery pack.

[0011] In a possible embodiment, the direct cooling flow channel includes a first direct cooling flow channel and a second direct cooling flow channel that are interconnected; the heat exchange device further includes a confluence pipe, the confluence pipe is arranged on one side of the heat exchange plate in the first direction, and the confluence pipe includes a relatively independent first confluence channel and a second confluence channel, the first confluence channel is connected to the first direct cooling flow channel, and the second confluence channel is connected to the second direct cooling flow channel;

[0012] Alternatively, the heat exchange device further includes a communicating pipe, which is disposed on the other side of the heat exchange plate in the first direction, and the communicating pipe is respectively communicated with the first direct cooling channel and the second direct cooling channel.

[0013] In a possible embodiment, the first direct cooling channel includes a plurality of first sub-direct cooling channels that are interconnected, and the plurality of first sub-direct cooling channels are arranged sequentially along the second direction.

[0014] In a possible embodiment, the heat exchange device further includes a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe, the liquid outlet pipe, and the confluence pipe are located on the same side of the heat exchange plate in the first direction;

[0015] Wherein, the liquid inlet pipe is communicated with the first confluence channel, and the liquid outlet pipe is communicated with the second confluence channel.

[0016] In a possible embodiment, the confluence pipe further includes two spaced-apart connectors, each of the connectors including a communication hole communicating with the confluence pipe;

[0017] The liquid inlet pipe and the liquid outlet pipe are inserted into the corresponding communicating holes of the connecting head.

[0018] In a possible implementation manner, a connecting plate is further provided on the liquid inlet pipe toward the corresponding connecting head; and the connecting plate is fixedly connected to the corresponding connecting head via bolts.

[0019] In a possible embodiment, the liquid inlet end of the direct cooling channel is suitable for connecting to the evaporator of the air conditioning system of the electrical equipment, and the liquid outlet end of the direct cooling channel is suitable for connecting to the compressor of the air conditioning system of the electrical equipment.

[0020] In a second aspect, an embodiment of the present application provides a battery pack, comprising at least one battery module and the heat exchange device of the first aspect, wherein each battery module comprises at least two stacked battery packs;

[0021] The heat exchange device is arranged between two adjacent battery packs and is used for exchanging heat with the two battery packs.

[0022] In a third aspect, an embodiment of the present application provides an electric device, comprising an electric device and the battery pack described in the second aspect, wherein the battery pack is electrically connected to the electric device to provide electric energy to the electric device.

[0023] In the heat exchange device, battery, and electrical equipment provided by the embodiments of the present application, a heat exchange plate is directly sandwiched between two battery packs and positioned in close contact with the battery packs. Compared to the winding method used in related art, this can reduce the volume of the heat exchange plate, thereby reducing the production cost of the heat exchange device. Furthermore, the plate-like structure of the heat exchange plate sandwiched between the two battery packs occupies a small area, simplifying its installation.

[0024] The direct cooling channel is suitable for connecting to the air conditioning system of the electrical equipment to circulate the refrigerant. Compared with the liquid cooling plate in the related art, it can eliminate a water pump system and directly use the existing air conditioning system, significantly reducing heat exchange costs and the weight of the entire electrical equipment.

[0025] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the heat exchange device, battery pack and electrical equipment provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0027] Figure 1 A schematic diagram of the structure of the battery pack provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of a portion of the structure of a battery pack provided in an embodiment of the present application;

[0029] Figure 3 A three-dimensional diagram of a heat exchange device provided in an embodiment of the present application;

[0030] Figure 4 A top view of a heat exchange device provided in an embodiment of the present application;

[0031] Figure 5 A three-dimensional diagram of a heat exchange plate provided in an embodiment of the present application;

[0032] Figure 6 For the Figure 5 An enlarged schematic diagram of region A;

[0033] Figure 7A three-dimensional diagram of a confluence pipe provided in an embodiment of the present application;

[0034] Figure 8 A top view of a conduit provided in an embodiment of the present application;

[0035] Figure 9 For the Figure 8 Cross-sectional view along the BB direction.

[0036] Description of reference numerals:

[0037] 1000: battery pack;

[0038] 100: heat exchange device;

[0039] 110: heat exchange plate; 111: direct cooling channel; 1111: first direct cooling channel; 1112: second direct cooling channel; 112: first recessed area; 113: second recessed area;

[0040] 120: conduit; 121: connector; 122: communication hole; 1221: first communication hole; 1222: second communication hole; 123: protrusion; 124: blocking member;

[0041] 130: connecting pipe;

[0042] 140: liquid inlet pipe; 141: connecting plate;

[0043] 150: liquid outlet pipe;

[0044] 160: bolt;

[0045] 200: battery module; 210: battery pack; 211: cylindrical battery cell;

[0046] 300: Cabinet.

[0047] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0048] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0049] As described in the background, heat exchange devices in related art typically utilize serpentine heat exchange tubes that cover the periphery of each battery pack, or rather, wrap around the sides and between the upper and lower battery packs. Consequently, these heat exchange devices suffer from a complex structure and high production costs. Furthermore, the limited space between adjacent battery packs further complicates assembly of the heat exchange device.

[0050] To address the above technical issues, embodiments of the present application provide a heat exchange device, battery pack, and electrical equipment. These devices utilize a heat exchange plate that is directly sandwiched between two battery packs and adheres closely to the battery packs. Compared to the winding method used in related art, this reduces the volume of the heat exchange plate, thereby lowering the production cost of the heat exchange device. Furthermore, the plate-like structure sandwiched between the two battery packs occupies a small area, simplifying installation.

[0051] The direct cooling channel is suitable for connecting to the air conditioning system of the electrical equipment to circulate the refrigerant. Compared with the liquid cooling plate in the related art, it can eliminate a water pump system and directly use the existing air conditioning system, significantly reducing heat exchange costs and the weight of the entire electrical equipment.

[0052] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0053] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] Please refer to Figure 1 and Figure 2 An embodiment of the present application provides a battery pack 1000. The battery pack 1000 can be used as an energy storage component in electrical equipment. For example, the battery pack 1000 can be used in a vehicle to provide electrical energy to the vehicle to ensure normal operation of the vehicle.

[0055] Please refer to Figure 2 The battery pack 1000 includes a housing 300. The housing 300 serves as the main supporting component and connecting component of the battery pack 1000 and is used to install the battery pack 1000 on an electrical device. For example, the battery pack 1000 can be installed on a vehicle.

[0056] The battery pack 1000 further includes at least one battery module 200, each battery module 200 including at least two stacked battery packs 210. Each battery pack 210 includes a plurality of cylindrical cells 211 arranged along a first direction. Figure 1 and Figure 2 Taking the illustrated orientation as an example, the first direction may be the X direction, and the stacking direction of at least two battery modules 210 may be the Z direction. It should be noted that the number of battery modules 200 may be one or more.

[0057] The battery pack 1000 further includes a heat exchange device 100, which is used to exchange heat with the battery module 200. Figures 3 to 6 The heat exchange device 100 includes a heat exchange plate 110, and a direct cooling channel 111 is formed in the heat exchange plate 110, wherein the direct cooling channel 111 is suitable for communicating with the air conditioning system of the electrical equipment to allow the refrigerant to circulate.

[0058] In the embodiment of the present application, the heat exchange plate 110 is disposed between any adjacent battery packs 210 and is disposed in close contact with the two battery packs 210. In other words, the upper surface of the heat exchange plate 110 is disposed in close contact with the battery pack 210 located above and adjacent to it, and the lower surface of the heat exchange plate 110 is disposed in close contact with the battery pack 210 located below and adjacent to it.

[0059] In this way, the heat exchange plate 110 is directly sandwiched between the two battery packs 210 and is positioned in close contact with the battery packs 210. Compared to the winding method used in related art, this can reduce the volume of the heat exchange plate 110, thereby reducing the production cost of the heat exchange device 100. In addition, the heat exchange plate 110 is sandwiched between the two battery packs 210 and has a plate-like structure, which occupies a small area and simplifies the installation of the heat exchange plate 110.

[0060] The direct cooling channel 111 is adapted to communicate with the air conditioning system of the electrical equipment to allow refrigerant to circulate. Compared with the liquid cooling plate in the related art, this can eliminate a water pump system and directly utilize the existing air conditioning system, significantly reducing heat exchange costs and the weight of the entire electrical equipment.

[0061] In order to better fit the heat exchange plate 110 and the battery pack 210, please continue to refer to Figure 3 Along the stacking direction of at least two battery packs 210, the heat exchange plate 110 includes a first surface and a second surface disposed opposite each other. The first surface is provided with a plurality of first recessed areas 112 arranged along the first direction, and the second surface is provided with a plurality of second recessed areas 113 arranged along the first direction.

[0062] Any adjacent first recessed areas 112 and second recessed areas 113 are staggered so that each of the first recessed area 112 and the second recessed area 113 is aligned with a corresponding cylindrical battery cell 211 in the battery pack 210. In other words, the orthographic projection of the first recessed area 112 on the second surface is located between two adjacent second recessed areas 113.

[0063] In this way, the first recessed area 112 on the first surface fits with the arc surface of the upper cylindrical battery cell 211, and the second recessed area 113 on the second surface fits with the arc surface of the lower cylindrical battery cell 211, forming a staggered cooling surface, thereby preventing the upper and lower cylindrical battery cells 211 from being cooled at the same position of the heat exchange plate 110, thereby improving the heat exchange effect between the heat exchange plate 110 and the battery module 200.

[0064] In some embodiments, a heating film can be directly attached to the first and second surfaces of the heat exchange plate 110. This allows the heat exchange configuration of the heat exchange device 100 to be freely configured based on the environment in which the battery module 200 is located. Furthermore, a thermally conductive structural adhesive is filled between the heating film and the cylindrical battery cells 211, as well as between any adjacent cylindrical battery cells 211, to facilitate rapid transfer of heat from the battery module 200 to the heat exchange plate 110.

[0065] Since the heat exchange plate 110 is sandwiched between two battery packs 210 in this embodiment, the width of the heat exchange plate 110 in the second direction can be appropriately increased, thereby ensuring the heat exchange effect of the heat exchange plate 110 .

[0066] It should be noted that the liquid inlet and outlet of the direct cooling channel 111 can be located on the same side or on different sides.

[0067] Exemplarily, the direct cooling channel 111 includes a first direct cooling channel 1111 and a second direct cooling channel 1112 that are interconnected. The heat exchange device 100 also includes a confluence pipe 120, which is disposed on one side of the heat exchange plate 110 in the first direction and includes a first confluence channel and a second confluence channel that are relatively independent. The first confluence channel is connected to the first direct cooling channel 1111, and the second confluence channel is connected to the second direct cooling channel 1112.

[0068] The first and second converging channels serve as the liquid inlet and outlet of the heat exchange plate 110, respectively. Thus, the first and second direct cooling channels 1111 and 1112 form a U-shaped structure. This allows the liquid inlet and outlet of the heat exchange plate 110 to be located on the same side, simplifying the piping layout of the heat exchange device and reducing the assembly cost of the heat exchange device 100.

[0069] It should be noted that the first confluence channel and the second confluence channel can be formed by providing a partition inside the entire confluence pipe; or they can be formed by two separate confluence pipes, which is not limited in this embodiment.

[0070] It should also be noted that the ends of the first direct cooling channel 1111 and the second direct cooling channel 1112 away from the converging pipe 120 can be directly connected inside the heat exchange plate 110, and other options are also possible.

[0071] Exemplarily, the heat exchange device 100 further includes a connecting pipe 130 , which is disposed on the other side of the heat exchange plate 110 in the first direction, and is connected to the first direct cooling channel 1111 and the second direct cooling channel 1112 , respectively.

[0072] The communication pipe 130 and the battery pack 210 are not stacked, so the space between adjacent battery packs 210 is not occupied, thereby increasing the contact area between the heat exchange plate 110 and the battery pack 210 as much as possible, thereby improving the heat exchange effect of the heat exchange plate 110.

[0073] It should be understood that the heat exchange plate 110 and the confluence pipe 120 or the communication pipe 130 may be connected directly by welding or by other connection methods.

[0074] For example, the conduit 120 includes a mounting port that can be connected to the conduit's inner cavity. One side of the heat exchange plate 110 is inserted into the conduit through the mounting port, and the periphery of the heat exchange plate 110 is welded to the conduit. This improves the stability of the connection between the heat exchange plate 110 and the conduit 120. The connection between the heat exchange plate 110 and the connecting conduit 130 can also refer to the above-described structure.

[0075] Please continue to refer to Figure 6 In one possible embodiment, the first direct cooling channel 1111 may include multiple interconnected first sub-direct cooling channels, with the multiple first sub-direct cooling channels arranged sequentially along the second direction. This allows for refrigerant flow diversion, improves refrigerant flow uniformity, reduces refrigerant pressure drop during flow, and enhances the heat exchange efficiency of the heat exchange device.

[0076] The cross-sectional shape of each first direct cooling sub-channel may be regular or irregular. In some embodiments, the cross-sectional shape of each first direct cooling sub-channel may be rectangular.

[0077] In one possible embodiment, the heat exchange device 100 further includes a liquid inlet pipe 140 and a liquid outlet pipe 150. The liquid inlet pipe 140, the liquid outlet pipe 150, and the confluence pipe 120 are located on the same side of the heat exchange plate 110 in the first direction. The liquid inlet pipe 140 is connected to the first confluence channel, and the liquid outlet pipe 150 is connected to the first confluence channel.

[0078] In this way, the refrigerant can enter the first direct cooling channel 1111 of the heat exchange plate 110 through the liquid inlet pipe 140 and the first confluence channel of the confluence pipe 120, and then flow out of the heat exchange plate 110 through the second direct cooling channel 1112, the first confluence channel of the confluence pipe 120 and the liquid outlet pipe 150 to complete the entire heat exchange cycle.

[0079] It should be noted that the liquid inlet pipe 140 and the liquid outlet pipe 150 can be respectively inserted into the corresponding confluence channel by plugging. Other connection methods are also possible.

[0080] As a possible implementation, please refer to Figures 7 to 9 The conduit 120 further includes two spaced-apart connectors 121, each of which includes a communication hole 122 communicating with the conduit 120. The inlet pipe 140 and the outlet pipe 150 are inserted into the communication holes 122 of the corresponding connectors 121, thereby achieving communication between the inlet pipe 140 and the outlet pipe 150 and the conduit 120.

[0081] The formation of the communication hole 122 can be determined according to the positional relationship between the connector 121 and the conduit 120. Figure 7 Taking the illustrated orientation as an example, the connector 121 is disposed at the top of the bus duct 120, and the communication holes 122 include a first communication hole 1221 and a second communication hole 1222 that are interconnected. The first communication hole 1221 extends along the second direction, i.e., along the extension direction of the bus duct 120. The second communication hole 1222 extends along the stacking direction of at least two stacked battery packs 210, i.e., the second communication hole 1222 extends along the perpendicular direction Y.

[0082] One end of the liquid inlet pipe 140 is inserted into the first communication hole 1221 and fixedly connected to the connector 121. In this way, the liquid inlet pipe 140 and the confluence pipe 120 are stacked in the stacking direction, which can optimize the layout of the heat exchange device 100 and save layout space.

[0083] It should be noted that the fixed connection between the liquid inlet pipe 140 and the connector 121 can be a welding connection or an interference fit.

[0084] The liquid inlet pipe 140 provided in the embodiment of the present application is further provided with a connecting plate 141 facing the corresponding connector 121; the connecting plate 141 is fixedly connected to the corresponding connector 121 via bolts 160. For example, the connector 121 has a protrusion 123 extending in a first direction, and the protrusion 123 is provided with a first connecting hole extending in a second direction; the connecting plate 141 has a second connecting hole that matches the first connecting hole.

[0085] The bolt 160 is passed through the second connection hole and the first connection hole and is fixed by a nut. In this way, the connection strength between the liquid inlet pipe 140 and the connector 121 can be further improved.

[0086] In some embodiments, sealing members 124 are provided at both ends of the conduit 120 to enhance the sealing performance of the conduit 120. The conduit 120, the two connectors 121, and the two sealing members 124 are integrally formed, and the first through-hole 1211 of the connector 121 is parallel to the conduit 120, thereby optimizing the refrigerant flow path.

[0087] In a possible embodiment, the liquid inlet end of the direct cooling channel 111 is suitable for connecting to the evaporator of the air conditioning system of the electrical equipment, and the liquid outlet end of the direct cooling channel is suitable for connecting to the compressor of the air conditioning system of the electrical equipment.

[0088] In other words, the liquid inlet pipe 140 of the heat exchange device 100 is suitable for connecting to the evaporator of the air conditioning system of the electric equipment, and the liquid outlet pipe 150 of the heat exchange device 100 is suitable for connecting to the compressor of the air conditioning system of the electric equipment.

[0089] The low-temperature, low-pressure gas-liquid refrigerant flowing out of the evaporator flows through the liquid inlet pipe 140 of the heat exchange device 100 to the heat exchange plate 110. At this time, the low-temperature liquid refrigerant absorbs heat from the battery module 200, vaporizes into gaseous refrigerant, and reduces the heat of the battery module 200. The gaseous refrigerant then flows through the liquid outlet pipe 150 of the heat exchange device 100 and the gas-liquid separator before returning to the compressor and entering the next cooling process.

[0090] In this way, compared with the liquid cooling plate in the related art, a water pump system can be reduced and the original air conditioning system can be directly used, which greatly reduces the heat exchange cost and the weight of the entire electrical equipment.

[0091] The present application also provides an electrical device, including an electrical device and the battery pack 1000 described in any of the above embodiments. The battery pack 1000 is electrically connected to the electrical device to provide electrical energy to the electrical device. Since a vehicle includes the battery pack 1000 described in any of the above embodiments, it possesses the structure and benefits of the battery pack 1000 and will not be further described in detail in this embodiment.

[0092] The electrical equipment in the embodiments of the present application may be a vehicle, for example, a new energy vehicle, which may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. Accordingly, the electrical device may be a vehicle drive mechanism or a vehicle control system.

[0093] In addition, the electrical equipment may also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecraft, etc., among which the spacecraft may include airplanes, rockets, space shuttles or spacecraft.

[0094] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0095] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat exchange device, characterized in that: The heat exchange device is used to exchange heat for a battery module, wherein the battery module comprises at least two battery packs stacked together; The heat exchange device includes a heat exchange plate, in which a direct cooling flow channel is formed. The direct cooling flow channel is suitable for connecting with the air-conditioning system of the electrical equipment to allow the refrigerant to circulate; wherein the heat exchange plate is arranged between any two adjacent battery packs and is respectively attached to the two battery packs.

2. The heat exchange device according to claim 1, characterized in that: Along the stacking direction of the at least two battery packs, the heat exchange plate includes a first surface and a second surface that are oppositely arranged; The first surface is provided with a plurality of first recessed areas arranged along a first direction, and the second surface is provided with a plurality of second recessed areas arranged along the first direction; Any adjacent first recessed areas and second recessed areas are staggered so that the first recessed areas and the second recessed areas are respectively fitted with a corresponding cylindrical battery cell in the battery pack.

3. The heat exchange device according to claim 1, characterized in that: The direct cooling flow channel includes a first direct cooling flow channel and a second direct cooling flow channel that are interconnected; the heat exchange device also includes a confluence pipe, the confluence pipe is arranged on one side of the heat exchange plate in the first direction, and the confluence pipe includes a relatively independent first confluence channel and a second confluence channel, the first confluence channel is connected to the first direct cooling flow channel, and the second confluence channel is connected to the second direct cooling flow channel; Alternatively, the heat exchange device further includes a communicating pipe, which is disposed on the other side of the heat exchange plate in the first direction, and the communicating pipe is respectively communicated with the first direct cooling channel and the second direct cooling channel.

4. The heat exchange device according to claim 3, characterized in that: The first direct cooling channel includes a plurality of first sub-direct cooling channels that are interconnected, and the plurality of first sub-direct cooling channels are arranged in sequence along the second direction.

5. The heat exchange device according to claim 4, characterized in that: The heat exchange device further includes a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe, the liquid outlet pipe and the confluence pipe are located on the same side of the heat exchange plate in the first direction; Wherein, the liquid inlet pipe is communicated with the first confluence channel, and the liquid outlet pipe is communicated with the second confluence channel.

6. The heat exchange device according to claim 5, characterized in that: The conduit further comprises two spaced-apart connectors, each of which comprises a communication hole communicating with the conduit; The liquid inlet pipe and the liquid outlet pipe are inserted into the corresponding communicating holes of the connecting head.

7. The heat exchange device according to claim 6, characterized in that: The liquid inlet pipe is further provided with a connecting plate toward the corresponding connecting head; the connecting plate is fixedly connected to the corresponding connecting head by bolts.

8. The heat exchange device according to any one of claims 1 to 7, characterized in that: The liquid inlet end of the direct cooling flow channel is suitable for connecting to the evaporator of the air-conditioning system of the electric equipment, and the liquid outlet end of the direct cooling flow channel is suitable for connecting to the compressor of the air-conditioning system of the electric equipment.

9. A battery pack, characterized in that: Comprising at least one battery module and the heat exchange device according to any one of claims 1 to 8, each of the battery modules comprising at least two stacked battery packs; The heat exchange device is arranged between two adjacent battery packs and is used for exchanging heat with the two battery packs.

10. An electrical device, characterized in that: The invention comprises an electric device and the battery pack according to claim 9, wherein the battery pack is electrically connected to the electric device to provide electric energy to the electric device.

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