Heat exchange device, battery pack and electric equipment

Abstract

The embodiment of the invention provides a heat exchange device, a battery pack and electric equipment, and relates to the technical field of energy storage. The heat exchange device comprises a liquid inlet and a plurality of cooling areas, the cooling areas are sequentially arranged in the first direction, and each cooling area is provided with a circulation channel. In the first direction, the liquid inlet is located in one side of the multiple cooling areas and communicates with the liquid inlet end of each cooling area. In the first direction, except the cooling area closest to the liquid inlet in the multiple cooling areas, at least one shunting node is arranged on the circulating channel of each of the other cooling areas; and in the first direction and the direction far away from the liquid inlet, the number of the shunting nodes in the plurality of cooling areas is in an increasing trend. According to the embodiment of the invention, the temperature uniformity of each cooling area of the heat exchange device can be improved, so that the heat balance of each battery pack in the battery pack is ensured.

Description

Technical Field

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

[0002] A battery pack is a device that converts chemical energy into electrical energy. It is widely used in new energy vehicles, energy storage power stations and other fields. A battery pack usually includes a shell and multiple battery packs arranged in the shell. Multiple battery packs generate a lot of heat when working, and a heat exchange device is usually required in the shell to dissipate the heat of the battery pack.

[0003] In the related art, the liquid cooling device usually includes a flow channel plate, wherein the flow channel plate is constructed with multiple cooling areas, and each cooling area includes a cooling branch, and the battery pack is cooled by flowing fluid through the cooling branch; however, the temperature uniformity of each cooling zone is poor, and it is difficult to ensure the thermal balance of each battery pack, thereby reducing the safety of the battery pack. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide a heat exchange device, a battery pack and an electrical equipment, which can improve the temperature uniformity of each cooling zone, thereby ensuring the thermal balance of each battery group in the battery pack, and help improve the safety of the battery pack and the electrical equipment.

[0005] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0006] A first aspect of an embodiment of the present application provides a heat exchange device, comprising: a liquid inlet and a plurality of cooling zones, the plurality of cooling zones being arranged in sequence along a first direction, and each of the cooling zones being provided with a flow channel; in the first direction, the liquid inlet is located at one side of the plurality of cooling zones, and is respectively connected to a liquid inlet end of each of the cooling zones;

[0007] In the first direction, except for the cooling zone closest to the liquid inlet, the flow channels of the remaining cooling zones are provided with at least one diversion node; in the first direction and in the direction away from the liquid inlet, the number of the diversion nodes in the multiple cooling zones tends to increase.

[0008] In a possible implementation, in the first direction and in the direction away from the liquid inlet, in any two adjacent cooling zones, the number of diversion nodes in the cooling zone close to the liquid inlet is less than or equal to the number of diversion nodes in the cooling zone away from the liquid inlet.

[0009] In a possible implementation, in the first direction and in the direction away from the liquid inlet, the number of the flow diversion nodes in the cooling zones among the plurality of cooling zones, except for the cooling zone closest to the liquid inlet, gradually increases.

[0010] In a possible implementation, in the first direction and in the direction away from the liquid inlet, the number of the flow splitting nodes in the cooling zone closest to the liquid inlet and the cooling zone second closest to the liquid inlet among the plurality of cooling zones is equal;

[0011] The number of the flow diversion nodes in the remaining cooling zones gradually increases.

[0012] In a possible implementation, when the number of the flow diversion nodes in any two adjacent cooling zones is equal, the flow channel of each cooling zone includes at least two flow diversion channels;

[0013] The length along the flow diversion channel in the cooling zone close to the liquid inlet is shorter than the length along the flow diversion channel in the cooling zone far from the liquid inlet.

[0014] In a possible implementation, in the first direction, except for the cooling zone closest to the liquid inlet, the remaining cooling zones are provided with at least one confluence node; in the first direction, each cooling zone includes a first edge and a second edge arranged relatively to each other, and the first edge is located between the liquid inlet and the second edge;

[0015] Among the plurality of cooling zones, except the cooling zone closest to the liquid inlet, in any other two adjacent cooling zones, the distance between the confluence node in the cooling zone close to the liquid inlet and the first edge is a first distance, and the distance between the confluence node in the cooling zone far from the liquid inlet and the first edge is a second distance;

[0016] The first distance is less than or equal to the second distance.

[0017] In a possible implementation, each of the cooling zones further includes a confluence node;

[0018] In the first direction, the flow dividing node of each cooling zone is arranged at at least one end of the cooling zone;

[0019] The confluence nodes of at least some of the cooling zones among the plurality of cooling zones are arranged in the middle of the cooling zone.

[0020] In a possible implementation, in the first direction and in a direction away from the liquid inlet, the inner diameters of the flow channels of the plurality of cooling zones tend to increase.

[0021] In a possible implementation, in the first direction and in a direction away from the liquid inlet, the inner diameters of the flow channels of the plurality of cooling zones gradually increase;

[0022] Alternatively, in the first direction away from the liquid inlet, in any two adjacent cooling zones, the inner diameter of the flow channel in the cooling zone close to the liquid inlet is less than or equal to the inner diameter of the flow channel in the cooling zone away from the liquid inlet.

[0023] In a possible implementation, the plurality of cooling zones include a first cooling zone, which is a cooling zone closest to the liquid inlet; and the first cooling zone is provided with one flow diversion node.

[0024] In a possible implementation, the flow splitting node divides the flow channel of the first cooling zone into a first flow splitting channel and a second flow splitting channel;

[0025] The first shunt channel is located on a side of the second shunt channel close to the liquid inlet, and the length along the first shunt channel is shorter than the length along the second shunt channel.

[0026] In a possible implementation, the circulation channel of the first cooling zone includes a first necking section, and an inner diameter of the first necking section is smaller than an inner diameter of a remaining area of ​​the circulation channel of the first cooling zone.

[0027] In a possible implementation, the flow channel of the first cooling zone further includes a converging channel, which is connected to the first diverting channel and the second diverting channel; and the first necking section is arranged in at least one of the first diverting channel, the second diverting channel and the converging channel.

[0028] In a possible implementation, the plurality of cooling zones further include a first cooling zone and a second cooling zone arranged along the first direction, and the second cooling zone is arranged on a side of the first cooling zone away from the liquid inlet;

[0029] The second cooling zone is provided with a diversion node, and the diversion node is arranged at the end of the flow channel of the second cooling zone facing the first cooling zone.

[0030] In a possible implementation, the flow splitting node of the second cooling zone divides the flow channel of the second cooling zone into a third flow splitting channel and a fourth flow splitting channel;

[0031] The third diversion channel is located on a side of the fourth diversion channel close to the first cooling zone, and the length along the third diversion channel is less than or equal to the length along the fourth diversion channel.

[0032] In a possible implementation, the circulation channel of the second cooling zone includes a second necking section, and an inner diameter of the second necking section is smaller than an inner diameter of a remaining area of ​​the circulation channel.

[0033] In a possible implementation manner, the second necking section is arranged in the third diverting channel and / or the fourth diverting channel.

[0034] In a possible implementation, along the first direction and away from the liquid inlet, the plurality of cooling zones further include a first cooling zone, a second cooling zone, and a third cooling zone arranged in sequence;

[0035] The third cooling zone is provided with three diversion nodes; in the first direction, two of the diversion nodes are arranged on a side of the third cooling zone close to the liquid inlet, and the other diversion node is arranged on a side of the third cooling zone away from the liquid inlet.

[0036] In a possible implementation, the third cooling zone includes a first sub-cooling zone and a second sub-cooling zone, and the first sub-cooling zone is located on a side of the second sub-cooling zone close to the second cooling zone;

[0037] Among the three flow splitting nodes, two of the flow splitting nodes are located on a side of the first sub-cooling zone close to the liquid inlet, and the other flow splitting node is located on a side of the second sub-cooling zone away from the liquid inlet.

[0038] In a possible implementation, along the first direction and away from the liquid inlet, the plurality of cooling zones further include a first cooling zone, a second cooling zone, a third cooling zone, and a fourth cooling zone arranged in sequence;

[0039] The third cooling zone is provided with six diversion nodes. In the first direction, three of the diversion nodes are arranged on a side of the fourth cooling zone close to the liquid inlet, and the other three of the diversion nodes are arranged on a side of the fourth cooling zone away from the liquid inlet.

[0040] In a possible implementation, the fourth cooling zone includes a third sub-cooling zone and a fourth sub-cooling zone;

[0041] Among the six flow diversion nodes, three of them are located on a side of the third sub-cooling zone close to the liquid inlet, and the other three of them are located on a side of the fourth sub-cooling zone away from the liquid inlet.

[0042] In a possible implementation manner, along the first direction, areas of the first cooling zone, the second cooling zone, the third cooling zone, and the fourth cooling zone gradually increase.

[0043] In a possible implementation, the heat exchange device further includes a liquid inlet area, and the liquid inlet is connected to each of the cooling areas through the liquid inlet area.

[0044] In a possible implementation, the liquid inlet area includes a plurality of liquid inlet channels, and the plurality of liquid inlet channels are correspondingly connected to a plurality of cooling areas.

[0045] In a possible implementation, the plurality of liquid inlet flow channels include a first liquid inlet flow channel, a second liquid inlet flow channel, and a third liquid inlet flow channel;

[0046] The liquid inlet is in communication with the first cooling zone through the first liquid inlet channel;

[0047] The liquid inlet is in communication with the second cooling zone through the second liquid inlet channel;

[0048] The liquid inlet is communicated with the third cooling zone through the third liquid inlet channel.

[0049] In a possible implementation, the plurality of liquid inlet flow channels include a fourth liquid inlet flow channel, the fourth liquid inlet flow channel includes a liquid inlet main path and a first liquid inlet branch path, a second liquid inlet branch path, and a third liquid inlet branch path; the liquid inlet main path is connected to the liquid inlet port and extends along the second direction; the first liquid inlet branch path, the second liquid inlet branch path, and the third liquid inlet branch path are respectively connected to the liquid inlet main path and are arranged in sequence in a direction away from the cooling zone;

[0050] Wherein, the first liquid inlet branch is connected to the third sub-cooling zone; the second liquid inlet branch and the third liquid inlet branch are both connected to the fourth sub-cooling zone.

[0051] In a possible implementation, the liquid inlet area includes a first liquid inlet area and a second liquid inlet area; the first liquid inlet area is located on one side of the plurality of cooling areas in the first direction and is connected to the liquid inlet;

[0052] The second liquid inlet area is located on a first side of the plurality of cooling areas in a second direction and is connected to the first liquid inlet area; the second direction intersects the first direction.

[0053] In a possible implementation, the liquid inlet main path is arranged in the first liquid inlet area, and the first liquid inlet branch path, the second liquid inlet branch path and the third liquid inlet branch path are arranged in the second liquid inlet area.

[0054] In a possible implementation, the heat exchange device further includes a liquid return port, which is located on the same side of the cooling zone as the liquid inlet and is communicated with a liquid return end of each cooling zone.

[0055] In a possible implementation, in the first direction, except for the cooling zone closest to the liquid inlet, the flow channels of the remaining cooling zones among the plurality of cooling zones are provided with at least one confluence node;

[0056] In the first direction and away from the liquid inlet, in any two adjacent cooling zones, the number of confluence nodes in the cooling zone close to the liquid inlet is less than or equal to the number of confluence nodes in the cooling zone away from the liquid inlet.

[0057] In a possible implementation, the heat exchange device further includes a liquid return area, and the liquid return area includes a plurality of liquid return flow channels;

[0058] The liquid return ends of the plurality of cooling zones are connected to the liquid return port through the corresponding liquid return flow channels.

[0059] In a possible implementation, the plurality of liquid return channels include a first liquid return channel and a second liquid return channel; the first liquid return channel connects the liquid outlet of the first cooling zone and the liquid return port, and the second liquid return channel connects the liquid outlet of the second cooling zone and the liquid return port.

[0060] In a possible implementation, the plurality of liquid return flow channels further include a third liquid return flow channel; the third liquid return flow channel includes a first liquid return branch, a second liquid return branch, and a first liquid return main path; the first liquid return branch and the second liquid return branch extend along the first direction and are sequentially arranged along the second direction; the first liquid return main path extends along the second direction;

[0061] The first sub-cooling zone is connected to the first liquid return main path through the first liquid return branch; the second sub-cooling zone is connected to the first liquid return main path through the second liquid return branch;

[0062] The second direction intersects with the first direction.

[0063] In a possible implementation, the plurality of liquid return flow channels further include a fourth liquid return flow channel, and the fourth liquid return flow channel includes a third liquid return branch, a fourth liquid return branch, a fifth liquid return branch, and a second liquid return main channel;

[0064] The third liquid return branch, the fourth liquid return branch, and the fifth liquid return branch are arranged in sequence in a direction away from the cooling zone, and all extend along the first direction; the second liquid return main path extends along the second direction;

[0065] The third liquid return branch connects the third sub-cooling zone and the second liquid return main path, and the fourth liquid return branch and the fifth liquid return branch connect the fourth sub-cooling zone and the second liquid return main path.

[0066] In a possible implementation, the liquid return zone includes a first liquid return zone and a second liquid return zone, and the first liquid return zone is located on one side of the plurality of cooling zones in the first direction;

[0067] The second liquid return zone is located on a second side of the plurality of cooling zones in the second direction and is connected to the first liquid return zone.

[0068] In a possible implementation, the heat exchange device includes a temperature averaging plate, a flow channel plate, a first joint and a second joint; the flow channel plate is arranged on the temperature averaging plate, and the cooling area, the liquid inlet area and the liquid return area are formed on the flow channel plate;

[0069] The first joint and the second joint are both arranged on the temperature equalizing plate, the first joint and the second joint are located on the same side of the cooling zone, the first joint is communicated with the liquid inlet, and the second joint is communicated with the liquid return port.

[0070] A second aspect of the embodiments of the present application provides a battery pack, comprising: a plurality of battery packs and the heat exchange device according to the first aspect;

[0071] The plurality of battery packs are arranged in sequence along a first direction, and each cooling zone of the heat exchange device corresponds to each battery pack.

[0072] A third aspect of the embodiments of the present application provides an electric device, comprising an electric device and the battery pack according to the second aspect; the battery pack is electrically connected to the electric device to provide electric energy to the electric device

[0073] In the heat exchange device, battery pack and electrical equipment provided in the embodiments of the present application, the heat exchange device includes a liquid inlet and multiple cooling zones, the multiple cooling zones are arranged in sequence along the first direction, each cooling zone is provided with a flow channel, in the first direction, except for the cooling zone closest to the liquid inlet, the flow channel is provided with at least one shunt node; in the first direction and in the direction away from the liquid inlet, the number of shunt nodes of the liquid inlet in the multiple cooling zones tends to increase. In this way, the flow channels of the cooling zones except for the cooling zone closest to the liquid inlet can be divided into at least two shunt channels by the shunt node, which is equivalent to shortening the length of each shunt channel, thereby reducing the pressure drop of the cooling zone away from the liquid inlet, so that the pressure drop of each cooling zone is as consistent as possible, thereby improving the temperature uniformity of each cooling zone and ensuring the heat balance of each battery in the battery pack.

[0074] 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

[0075] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0076] Figure 1 A schematic diagram of a heat exchange device provided in the related art;

[0077] Figure 2 An exploded schematic diagram of a heat exchange device provided in an embodiment of the present application;

[0078] Figure 3 A schematic diagram of a flow channel plate provided in an embodiment of the present application;

[0079] Figure 4 A schematic diagram of a first cooling zone provided in an embodiment of the present application;

[0080] Figure 5 Partial schematic diagram of the second cooling zone provided in the embodiment of the present application Figure 1 ;

[0081] Figure 6 Partial schematic diagram of the second cooling zone provided in the embodiment of the present application Figure 2 ;

[0082] Figure 7 Partial schematic diagram of the third cooling zone provided in the embodiment of the present application Figure 1 ;

[0083] Figure 8 Partial schematic diagram of the third cooling zone provided in the embodiment of the present application Figure 2 ;

[0084] Fig. 9 Partial schematic diagram of the fourth cooling zone provided in the embodiment of the present application Figure 1 ;

[0085] Fig.10 Partial schematic diagram of the fourth cooling zone provided in the embodiment of the present application Figure 2 ;

[0086] Fig.11 A schematic diagram of a battery pack provided in an embodiment of the present application.

[0087] Description of reference numerals:

[0088] 1: Cooling area; 2: Main circuit; 3: Liquid inlet interface; 4: Liquid outlet interface;

[0089] 100: heat exchange device;

[0090] 10: Liquid inlet;

[0091] 20: cooling zone; 201: first edge; 202: second edge; 21: first cooling zone; 22: second cooling zone; 23: third cooling zone; 231: first sub-cooling zone; 232: second sub-cooling zone; 24: fourth cooling zone; 241: third sub-cooling zone; 242: fourth sub-cooling zone; 251: shunt node; 252: confluence node;

[0092] 26: circulation channel of the first cooling zone; 261: first flow diversion channel; 262: second flow diversion channel; 263: first necking section; 264: converging channel;

[0093] 27: circulation channel of the second cooling zone; 271: third flow diversion channel; 272: fourth flow diversion channel; 273: second necking section;

[0094] 28: circulation channel of the third cooling zone; 281: first branch flow path; 282: second branch flow path; 283: fifth branch flow path; 284: sixth branch flow path; 285: seventh branch flow path; 286: eighth branch flow path;

[0095] 29: circulation channel of the fourth cooling zone; 291: ninth branch channel; 292: tenth branch channel; 293: eleventh branch channel; 294: twelfth branch channel; 295: thirteenth branch channel; 296: fourteenth branch channel;

[0096] 30: runner plate;

[0097] 40: Temperature balancing board;

[0098] 50: liquid inlet area; 51: first liquid inlet channel; 52: second liquid inlet channel; 53: third liquid inlet channel; 54: fourth liquid inlet channel; 541: liquid inlet main channel; 542: first liquid inlet branch channel; 543: second liquid inlet branch channel; 544: third liquid inlet branch channel;

[0099] 60: liquid return port;

[0100] 70: liquid return area; 71: first liquid return channel; 72: second liquid return channel; 73: third liquid return channel; 731: first liquid return branch; 732: second liquid return branch; 733: first liquid return main channel; 74: fourth liquid return channel; 741: third liquid return branch; 742: fourth liquid return branch; 743: fifth liquid return branch; 744: second liquid return main channel;

[0101] 80: first joint; 90: second joint;

[0102] 200: Battery pack. DETAILED DESCRIPTION

[0103] As described in the background technology, the problem of poor temperature uniformity in each cooling zone of the flow channel plate in the related technology is found by the inventors through research that the reason for this problem is that the cooling zones of the flow channel plate are unevenly distributed; for example, please refer to the attached Figure 1 , the flow channel plate usually includes four cooling zones 1, and the flow channel plate includes a main path 2 extending along the length direction, wherein two cooling zones 1 are arranged on one side of the main path 2, and the other two cooling zones 1 are arranged on the other side of the main path 2. Among them, the flow channel plate is also provided with a liquid inlet interface 3 and a liquid outlet interface 4, the liquid inlet interface 3 is connected to the liquid inlet end of each cooling zone through the main path, and the liquid outlet interface 4 is connected to the liquid outlet end of each cooling zone through the return path. However, the liquid inlet interface 3 and the liquid outlet interface 4 are usually located on one side of the main path 2, so that the lengths of the flow channels of the cooling zones located on both sides of the main path 2 are different, which causes the temperature of each cooling zone 1 to be uneven.

[0104] In response to the above technical problems, the embodiments of the present application provide a heat exchange device, a battery pack and an electrical device. The heat exchange device includes a liquid inlet and multiple cooling zones. The multiple cooling zones are arranged in sequence along a first direction. Each cooling zone is provided with a flow channel. In the first direction, in the cooling zones other than the cooling zone closest to the liquid inlet, the flow channel is provided with at least one shunt node. In the first direction and in the direction away from the liquid inlet, the number of shunt nodes of the liquid inlet in the multiple cooling zones tends to increase. In this way, the flow channels of the cooling zones other than the cooling zone closest to the liquid inlet can be separated into at least two shunt channels by the shunt nodes, which is equivalent to shortening the length of each shunt channel, thereby reducing the pressure drop of the cooling zone away from the liquid inlet, so that the pressure drop of each cooling zone is as consistent as possible, thereby improving the temperature uniformity of each cooling zone and ensuring the heat balance of each battery in the battery pack.

[0105] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, 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 creative work belong to the scope of protection of this application.

[0106] Please refer to the attached Figure 2 The present application embodiment provides a heat exchange device 100, which can be used to cool a component to be processed to reduce the temperature of the component to be processed. The component to be processed may include but is not limited to a battery pack. It should be understood that the following description is based on the example of the heat exchange device 100 exchanging heat on a battery pack.

[0107] Please refer to the attached Figure 2 and attached Figure 3 , the heat exchange device 100 may include a liquid inlet 10 and a plurality of cooling zones 20, wherein the cooling zone 20 may be formed on the flow channel plate 30; for example, the cooling zone 20 may be formed on the flow channel plate 30 by a stamping process. It should be noted that the heat exchange device 100 in this embodiment also includes a temperature averaging plate 40, which is arranged on the side of the flow channel plate 30 away from the cooling zone, and is used to carry the flow channel plate 30 and cover the cooling zone 20 to ensure the sealing of the heat exchange device 100. In addition, the temperature averaging plate 40 also facilitates the installation and fixation of the heat exchange device 100 and the component to be cooled.

[0108] The shape of the flow channel plate 30 can be regular or irregular. The following embodiments are described by taking the flow channel plate 30 as a rectangle as an example.

[0109] Please refer to the attached Figure 3 The plurality of cooling zones 20 are arranged in sequence along a first direction. The first direction may be the length direction of the flow channel plate 30, i.e. Figure 3 The second direction may be the width direction of the flow channel plate 30, i.e. Figure 3 It should be noted that the plurality of cooling zones 20 may also be connected in parallel with each other, so that the plurality of cooling zones 20 are relatively independently arranged, so as to facilitate independent control of the plurality of cooling zones 20 .

[0110] In the first direction, the liquid inlet 10 is located on one side of the plurality of cooling zones 20. Figure 3Taking the orientation shown as an example, the liquid inlet 10 can be located on the left side of the multiple cooling zones 20, or on the right side of the multiple cooling zones 20. The liquid inlet 10 is respectively connected to the liquid inlet end of each cooling zone 20, so that the fluid circulates in each cooling zone 20 and exchanges heat with each battery pack 200. It should be noted that heat exchange in this embodiment can be understood as the heat exchange device 100 being able to cool down the battery pack 200, and can also heat the battery pack 200. Specifically, the type of fluid circulating in the cooling zone 20 can be freely selected according to the environment in which the battery pack 200 is located. For example, when the heat exchange device 100 is used to cool down the battery pack 200, the fluid may include refrigerant, CO2, ethylene glycol or water.

[0111] Each cooling zone 20 is provided with a circulation channel; the circulation channel is used for fluid circulation, and then heat exchange with the battery pack 200, so that the battery pack 200 is within a suitable temperature range. In the first direction and in the direction away from the liquid inlet 10, except for the cooling zone 20 closest to the liquid inlet 10, the circulation channels of the remaining cooling zones 20 are all provided with at least one shunt node 251.

[0112] It should be noted that in this embodiment, the cooling zone 20 closest to the liquid inlet 10 among the multiple cooling zones 20 may be provided with a flow splitting node 251, or may not be provided with a flow splitting node 251. In this embodiment, the cooling zone 20 closest to the liquid inlet 10 may be understood as the cooling zone 20 closest to the liquid inlet 10, i.e., the cooling zone 20 adjacent to the liquid inlet 10. Figure 3 In the first cooling zone 20. In this embodiment, the function of the flow dividing node 251 is to divide the flow channel into different flow dividing channels, so the area where two flow dividing channels are connected is called the flow dividing node 251.

[0113] In this embodiment, the number of cooling zones 20 can be selected in various ways, for example, the number of cooling zones 20 can be two, three, four or even more. Figure 3 Taking the structure shown as an example, the number of cooling zones 20 is four, that is, the multiple cooling zones 20 include a first cooling zone 21, a second cooling zone 22, a third cooling zone 23 and a fourth cooling zone 24, wherein the first cooling zone 21 is the cooling zone 20 closest to the liquid inlet 10; at the same time, except for the cooling zone 20 closest to the liquid inlet 10, the remaining cooling zones 20 are the second cooling zone 22, the third cooling zone 23 and the fourth cooling zone 24.

[0114] If the first cooling zone 21, the second cooling zone 22, the third cooling zone 23 and the fourth cooling zone 24 maintain the same pressure drop, the following defects will be caused: the first cooling zone 21 is closest to the liquid inlet 10, so the temperature of the fluid in the first cooling zone 21 is lower; if the pressure drop of the first cooling zone 21 is the same as the pressure drop of other cooling zones 20, under the premise of the same heat exchange time, the heat exchange cooling capacity of the first cooling zone 21 will be higher than that of the remaining cooling zones 20, resulting in uneven cooling capacity of each cooling zone 20. Based on this, this embodiment requires that, except for the cooling zone 20 closest to the liquid inlet 10, the flow channels of the remaining cooling zones 20 are all provided with at least one diversion node 251.

[0115] Based on this, the present embodiment utilizes the shunt node 251 to separate the flow channel of the cooling zone 20 away from the liquid inlet 10, so that the flow channel includes at least two shunt channels, which is equivalent to shortening the length of each shunt channel, thereby reducing the pressure drop in the cooling zone away from the liquid inlet, making the pressure drop of each cooling zone as consistent as possible, thereby improving the temperature uniformity of each cooling zone and ensuring the thermal balance of each battery group 200 in the battery pack.

[0116] In addition, in the first direction and in the direction away from the liquid inlet 10, the number of the shunt nodes 251 in the plurality of cooling zones 20 is increasing. In this embodiment, by setting fewer shunt nodes 251 in the cooling zone 20 close to the liquid inlet 10 and setting more shunt nodes 251 in the cooling zone 20 away from the liquid inlet 10, it is possible to ensure that the fluid maintains a higher pressure drop in the cooling zone 20 close to the liquid inlet 10, thereby ensuring that the fluid can quickly reach the cooling zone 20 farther away, and shortening the heat exchange time of the fluid in each cooling zone 20 close to the liquid inlet 10, avoiding excessive consumption of cooling when the fluid passes through the cooling zone 20 close to the liquid inlet 10, thereby preventing the insufficient heat exchange capacity of each cooling zone 20 away from the liquid inlet 10, thereby improving the balance of the cooling performance of each cooling zone 20.

[0117] In addition, by reasonably allocating the number of flow diversion nodes 251 in each cooling zone 20 , the flow resistance of the fluid in the heat exchange device 100 can be effectively reduced, thereby improving the cooling efficiency of the entire heat exchange device 100 .

[0118] In a possible implementation, in any two adjacent cooling zones 20 in the first direction and in the direction away from the liquid inlet 10, the number of the diversion nodes 251 in the cooling zone 20 on the side close to the liquid inlet 10 is less than or equal to the number of the diversion nodes 251 in the cooling zone 20 on the side away from the liquid inlet 10. Exemplarily, the number of the diversion nodes 251 in the first cooling zone 21 is less than or equal to the number of the diversion nodes 251 in the second cooling zone 22; the number of the diversion nodes 251 in the second cooling zone 22 is less than or equal to the number of the diversion nodes 251 in the third cooling zone 23, and the number of the diversion nodes 251 in the third cooling zone 23 is less than or equal to the number of the diversion nodes 251 in the fourth cooling zone 24.

[0119] In this way, the pressure drops of adjacent cooling zones 20 are balanced as much as possible, thereby improving the temperature uniformity of each cooling zone and ensuring the heat balance of each battery group 200 in the battery pack.

[0120] In a possible implementation, in the first direction and in the direction away from the liquid inlet 10, the number of the diversion nodes 251 in the remaining cooling zones 20, except for the cooling zone 20 closest to the cooling zone 20, gradually increases. In this way, the diversion nodes 251 in the remaining cooling zones 20 can ensure that the fluid is gradually dispersed in the remaining cooling zones 20, avoiding excessive concentration or sparseness of the fluid in a certain cooling zone 20, thereby making the heat exchange device 100 have a more uniform cooling effect. In addition, gradually increasing the number of diversion nodes in the remaining cooling zones 20 helps to optimize the flow path and speed of the fluid, reduce fluid flow resistance and turbulence, and thus improve the overall efficiency of the heat exchange device 100.

[0121] It should be noted that there are multiple options for the layout of the shunt nodes 251 in the cooling zone 20 closest to the liquid inlet 10 and the cooling zone 20 second closest to the liquid inlet 10. For example, the shunt node 251 is not provided in the cooling zone 20 closest to the liquid inlet 10. For another example, the shunt node 251 is provided in the cooling zone 20 closest to the liquid inlet 10. When the shunt node 251 is provided in the cooling zone 20 closest to the liquid inlet 10, the number of shunt nodes 251 in the cooling zone 20 closest to the liquid inlet 10 may be less than the number of shunt nodes 251 in the cooling zone 20 second closest to the liquid inlet 10, or may be equal to the number of shunt nodes 251 in the cooling zone 20 second closest to the liquid inlet 10. Among them, the cooling zone 20 closest to the liquid inlet 10 can be understood as the first cooling zone 20 in the first direction, for example, the cooling zone 20 closest to the liquid inlet 10 is the first cooling zone 21; the cooling zone 20 second closest to the liquid inlet 10 can be understood as the second cooling zone 20 in the first direction, for example, the cooling zone 20 second closest to the liquid inlet 10 is the second cooling zone 22.

[0122] Preferably, in the first direction away from the liquid inlet 10, the number of diversion nodes 251 in the cooling zone 20 closest to the liquid inlet 10 and the cooling zone 20 second closest to the liquid inlet 10 among the multiple cooling zones 20 is equal; the number of diversion nodes 251 in the remaining cooling zones 20 gradually increases.

[0123] In this embodiment, by setting the shunt node 251 in the cooling zone 20 closest to the liquid inlet 10, the pressure drop and flow rate of the fluid in the cooling zone 20 closest to the liquid inlet 10 can be prevented from being too large, and the cooling zone 20 closest to the liquid inlet 10 can be prevented from overheating. Afterwards, in conjunction with the technical solution of gradually increasing the number of shunt nodes 251 in the remaining cooling zones 20, it can be ensured that the fluid can be more fully dispersed and flowed in the cooling zone 20 away from the liquid inlet 10. This gradually increasing design can optimize the heat exchange efficiency of the heat exchange device 100 and ensure that the cooling effect of the entire heat exchange device 100 is more uniform and efficient.

[0124] In a possible implementation, when the number of the flow diversion nodes 251 in any two adjacent cooling zones 20 is equal, the flow channel of each cooling zone 20 includes at least two flow diversion channels; that is, each cooling zone 20 includes at least one flow diversion node.

[0125] The length of the diverter channel in the cooling zone 20 close to the liquid inlet 10 is shorter than the length of the diverter channel in the cooling zone 20 far from the liquid inlet 10 .

[0126] The following description is made by taking the case where a flow splitting node 251 is provided in the two cooling zones 20 closest to the liquid inlet 10 and the two cooling zones 20 next closest to the liquid inlet 10 as an example. Exemplarily, the multiple cooling zones 20 include a first cooling zone 21, which is the cooling zone closest to the liquid inlet 10, and a flow splitting node 251 is provided in the first cooling zone 21, and the flow splitting node 251 is located on the side of the flow channel away from the liquid inlet 10.

[0127] Please refer to the attached Figure 4 The shunt node 251 divides the flow channel 26 of the first cooling zone into a first shunt channel 261 and a second shunt channel 262 , wherein the first shunt channel 261 and the second shunt channel 262 converge at the end away from the shunt node 251 to form a converging channel 264 .

[0128] Please refer to the attached Figure 5 and attached Figure 6 The plurality of cooling zones 20 further include a second cooling zone 22, which is a cooling zone next to the liquid inlet 10. A flow dividing node 251 is disposed in the second cooling zone 22, and the flow dividing node 251 is disposed in the middle of the second cooling zone 22 to divide the flow channel of the second cooling zone into a third flow dividing channel 271 and a fourth flow dividing channel 272.

[0129] In this embodiment, the lengths along the first shunt channel 261 and the second shunt channel 262 are less than the lengths along the third shunt channel 271 and the fourth shunt channel 272. In this way, it can be ensured that the converging channel 264 in the first cooling zone 21 still has a relatively long length along the length. Compared with the single circulation channel and the second cooling zone 22, the length of the single circulation channel can be relatively reduced to avoid the defect of excessive pressure drop in the first cooling zone 21, and it can also be balanced with the second cooling zone 22, ensuring the balance of the cooling capacity of the first cooling zone 21 and the second cooling zone 22.

[0130] It should be noted that when the cooling zone 20 includes a flow distribution node 251 , a flow confluence node 252 is also provided in the cooling zone 20 accordingly.

[0131] Exemplarily, in the first direction, except for the cooling zone 20 closest to the liquid inlet 10, the remaining cooling zones 20 are provided with at least one confluence node 252. It should be understood that when the cooling zone 20 closest to the liquid inlet 10 is provided with a diversion node 251, correspondingly, the cooling zone 20 closest to the liquid inlet 10 is also provided with a confluence node 252.

[0132] Please continue to refer to the attached Figure 4 To Attachment Fig.10 Each cooling zone 20 includes a first edge 201 and a second edge 202 that are arranged opposite to each other, and the first edge 201 is located between the liquid inlet 10 and the second edge 202, that is, the first edge 201 is adjacent to the liquid inlet 10. Figure 4 Taking the illustrated orientation as an example, the first edge 201 is the left edge of the first cooling zone 21 , and the second edge 202 is the right edge of the first cooling zone 21 .

[0133] Except for the cooling zone 20 closest to the liquid inlet 10, among any two adjacent cooling zones 20, the distance between the confluence node 252 in the cooling zone 20 close to the liquid inlet 10 and the first edge 201 is the first distance, and the distance between the confluence node 252 in the cooling zone far from the liquid inlet 10 and the first edge 201 is the second distance; the first distance is less than or equal to the second distance. Such a setting can reasonably distribute the flow velocity and flow rate of the fluid in each cooling zone, avoid the situation that some cooling zones are overcooled or overheated, thereby achieving a more uniform temperature distribution and improving the heat exchange effect of the heat exchange device.

[0134] In one possible implementation, each cooling zone 20 also includes a confluence node 252; in the first direction, the diversion node of each cooling zone 20 is arranged at at least one end of the cooling zone 20; the confluence node 252 of at least some of the cooling zones among the multiple cooling zones 20 is arranged in the middle of the cooling zone 20.

[0135] It should be noted that in this embodiment, the end portion can be understood as the cooling zone 20 having an end portion facing the liquid inlet 10 and an end portion away from the liquid inlet 10 in the first direction. Figure 4 Taking the orientation shown as an example, one end corresponds to the first edge 201 , and the other end corresponds to the second edge 202 .

[0136] In this embodiment, a cooling zone 20 usually exchanges heat for a battery pack 200, and different areas of the battery pack 200 have different heat generation. For example, the battery pack 200 includes a first heating area and a second heating area, the heat generation of the first heating area is greater than the heat generation of the second heating area, and the first heating area is at least arranged on one side of the second heating area. It should be noted that in this embodiment, the first heating area can be an area opposite to the pole of the battery pack, the heat generation of this area is relatively large, and it is usually located at both ends of the battery pack in the first direction; the second heating area can be other areas of the battery pack except the area opposite to the pole, the heat generation of this area is relatively small, and it is usually the middle area of ​​the battery pack.

[0137] Therefore, in this embodiment, the shunt node 251 is set at at least one end of the cooling zone 20 in the first direction, and the confluence node 252 is set in the middle of the cooling zone 20, so that the end of the fluid in the first direction enters the cooling zone 20, and then flows back from the middle of the cooling zone 20. When the heat exchange device is used to cool the battery, it can ensure that the fluid first flows through the end of the battery with a larger heat generation and exchanges heat, and then flows out from the middle of the battery with a smaller heat generation, which can improve the cooling effect on the battery. In addition, the superposition effect of local overheating caused by the heat exchange device and the high heat generation area of ​​the battery can be avoided.

[0138] It should be noted that, in order to balance the pressure drops of the cooling zones 20 , in addition to adjusting the number and location of the shunt nodes 251 and confluence nodes 252 of each cooling zone 20 , other features may also be used to limit the balance.

[0139] Exemplarily, in the first direction and in the direction away from the liquid inlet 10, the inner diameters of the circulation channels of the plurality of cooling zones 20 tend to increase. In one example, in the first direction and in the direction away from the liquid inlet 10, the inner diameters of the circulation channels of the plurality of cooling zones 20 gradually increase. In another example, in the first direction and in the direction away from the liquid inlet, in any two adjacent cooling zones 20, the inner diameter of the circulation channel in the cooling zone 20 close to the liquid inlet 10 is less than or equal to the inner diameter of the circulation channel in the cooling zone 20 away from the liquid inlet 10.

[0140] In view of the fact that the inner diameter of the circulation channel is inversely proportional to the pressure drop, the smaller the inner diameter of the circulation channel, the smaller the cross-sectional area of ​​the fluid flow, the higher the flow rate, the greater the friction loss, and the greater the pressure drop. At the same time, the circulation channel away from the liquid inlet 10 is already relatively large along the way. Therefore, in order to reduce the pressure drop in the cooling zone 20 away from the liquid inlet 10 as much as possible, in this example, the inner diameters of the circulation channels of multiple cooling zones 20 tend to increase, so that the pressure drop of each cooling zone 20 can be balanced as much as possible, so that the pressure drop area of ​​each cooling zone 20 is consistent.

[0141] In order to facilitate the detailed description of each cooling zone 20, it is convenient to take the number of cooling zones 20 as four as an example. Exemplarily, the plurality of cooling zones 20 include a first cooling zone 21, a second cooling zone 22, a third cooling zone 23 and a fourth cooling zone 24 arranged in sequence along the first direction. Among them, the inner diameter of the circulation channel 29 of the fourth cooling zone is greater than the inner diameter of the circulation channel 28 of the third cooling zone; the inner diameter of the circulation channel 28 of the third cooling zone is greater than the inner diameter of the circulation channel 26 of the first cooling zone, and the inner diameter of the circulation channel 26 of the first cooling zone is greater than the inner diameter of the circulation channel 27 of the second cooling zone. In view of the fact that the inner diameter of the circulation channel is inversely proportional to the pressure drop, the smaller the inner diameter of the circulation channel, the smaller the cross-sectional area of ​​the fluid flow, the higher the flow rate, the greater the friction loss, and the greater the pressure drop, so in order to minimize the pressure drop of the fourth cooling zone, the inner diameter of the circulation channel 29 of the fourth cooling zone can be set to be greater than the inner diameter of the circulation channel 28 of the third cooling zone.

[0142] It should be understood that, given that the first cooling zone adopts a design concept of no diversion or a diversion node far away from the liquid inlet, the first cooling zone 21 already has a sufficiently large pressure drop. If the inner diameter of the circulation channel 26 of the first cooling zone is too small, the pressure drop of the first cooling zone 21 will be excessively reduced. Therefore, in this embodiment, the inner diameter of the circulation channel 26 of the first cooling zone is larger than the inner diameter of the circulation channel 27 of the second cooling zone, so that the pressure drop of the first cooling zone 21 can be adjusted to ensure the balance of the cooling capacity of each cooling zone 20 as much as possible.

[0143] The following embodiments all take multiple cooling zones 20 including a first cooling zone 21, a second cooling zone 22, a third cooling zone 23 and a fourth cooling zone 24 arranged in sequence along a first direction as an example, and describe in detail the number of diversion nodes in each cooling zone 20 and the layout of the flow channels.

[0144] In a possible implementation, the first cooling zone 21 is the cooling zone closest to the liquid inlet 10; the first cooling zone 21 is provided with a shunt node 251. If the circulation channel in the first cooling zone 21 is arranged in a single-tube form, the circulation channel will be too long, and the pressure drop and flow rate in the circulation channel will be too large, so that the heat exchange time between the first cooling zone 21 and the battery is too short, and it is difficult to achieve the ideal cooling effect. Therefore, in this embodiment, a shunt node 251 is provided in the first cooling zone 21, so that the fluid is divided into two shunt channels in the first cooling zone 21, thereby relatively reducing the length of a single circulation path, and avoiding the defect of excessively increasing the pressure drop of the first cooling zone 21.

[0145] In order to further adjust the cooling effect of the first cooling zone 21, please refer to the attached Figure 4 , the shunt node 251 is located on the side of the circulation channel away from the liquid inlet 10, and divides the circulation channel 26 of the first cooling zone into a first shunt channel 261 and a second shunt channel 262. Among them, the first shunt channel 261 is located on the side of the second shunt channel 262 close to the liquid inlet 10, and the length along the first shunt channel 261 is less than the length along the second shunt channel 262. In addition, in other embodiments, the length along the first shunt channel 261 can also be equal to the length of the second shunt channel 262. It should be noted that in this embodiment, the length along can be understood as the distance of the fluid flow path.

[0146] In this embodiment, while ensuring that the circulation channel 26 of the first cooling zone has a sufficiently high pressure drop, the pressure drop of the first cooling zone 21 is fine-tuned through the second diversion channel 262, so that the flow in the second diversion channel 262 is slightly increased, thereby reducing the temperature difference between the first cooling zone 21 and each other cooling zone 20.

[0147] In addition, when the heat exchange device 100 is used to cool the battery pack, the width direction of the battery pack is usually parallel to the first direction, and the length direction of the battery pack is usually perpendicular to the first direction. Therefore, the size of the first cooling zone 21 in the first direction needs to match the width of the battery pack; this embodiment divides the flow channel 26 of the first cooling zone into a first shunt channel 261 and a second shunt channel 262, and uses the second shunt channel 262, which is relatively short along the way, for fine-tuning, which can facilitate the laying of the flow channel 26 of the first cooling zone, so that the flow channel 26 of the first cooling zone covers the width of the battery pack as much as possible, thereby ensuring the temperature uniformity of each area of ​​the battery pack and improving the safety of the battery pack.

[0148] The inner diameter of the flow channel 26 of the first cooling zone may be equal or different. For example, the flow channel 26 of the first cooling zone includes a first necking section 263, wherein the first necking section 263 may be an attached Figure 4The area within the dashed box.

[0149] The inner diameter of the first necking section 263 is smaller than the inner diameter of the remaining area of ​​the circulation channel 26 of the first cooling zone. The pressure drop of the circulation channel 26 of the first cooling zone is also related to the inner diameter. For example, the pressure drop of the circulation channel 26 of the first cooling zone is inversely proportional to the inner diameter. When the inner diameter of the circulation channel 26 of the first cooling zone is smaller, the pressure drop of the circulation channel 26 of the first cooling zone is greater.

[0150] This embodiment can help form a local high flow rate area by partially reducing the inner diameter of the circulation channel 26 of the first cooling zone, so that the circulation channel 26 of the first cooling zone is in a high pressure drop state as a whole, which is convenient for adjusting the cooling effect of the first cooling zone 21.

[0151] It should be noted that the location and length of the first necking section 263 can be reasonably set according to the requirements of the cooling effect of the heat exchange device. For example, the flow channel 26 of the first cooling zone also includes a converging channel 264, which is connected to the first shunt channel 261 and the second shunt channel 262; or, the first shunt channel 261 and the second shunt channel 262 converge at the converging node 252 to form the converging channel 264.

[0152] The first necking section 263 is disposed in at least one of the first shunt channel 261, the second shunt channel 262 and the converging channel 264. In one example, the first necking section 263 is disposed in one of the first shunt channel 261, the second shunt channel 262 and the converging channel 264; in another example, the first necking section 263 is disposed in at least two of the first shunt channel 261, the second shunt channel 262 and the converging channel 264. In this way, under the premise of ensuring that a local high flow velocity area is formed in the circulation channel 26 of the first cooling zone, greater design flexibility can be provided for the setting of the first necking section 263, ensuring that the first cooling zone 21 can maintain a stable cooling effect under different working conditions, thereby improving the reliability and stability of the heat exchange device.

[0153] Please refer to the attached Figure 3 , Attachment Figure 5 and attached Figure 6 The plurality of cooling zones further comprises a second cooling zone 22, which is arranged on a side of the first cooling zone 21 away from the liquid inlet 10; Figure 3 Taking the shown orientation as an example, the second cooling zone 22 is arranged on the right side of the first cooling zone 21 , that is, the distance between the second cooling zone 22 and the liquid inlet 10 is greater than the distance between the first cooling zone 21 and the liquid inlet 10 .

[0154] Among them, the second cooling zone 22 is provided with a diversion node 251, so that the fluid is divided into two flow paths in the second cooling zone 22. Compared with the flow channel 27 of the second cooling zone which is a whole pipeline, the length of a single flow path can be relatively shortened to achieve the purpose of reducing the pressure drop in the second cooling zone 22, thereby reducing the flow rate of the fluid in the second cooling zone 22, increasing the residence time of the fluid in the second cooling zone 22, and balancing the temperature difference between the second cooling zone 22 and the first cooling zone 21.

[0155] In this embodiment, the flow splitting node 251 is arranged at the end of the flow channel 27 of the second cooling zone toward the first cooling zone 21, so that the fluid can be split as early as possible in the second cooling zone 22, which is conducive to the fluid being more evenly distributed in the second cooling zone 22 as early as possible, and the defect of local overheating can be avoided. In addition, the earlier the fluid is split in the second cooling zone 22 as early as possible, the more conducive it is to adjust the pressure drop of the second cooling zone 22, reduce the pressure drop of the second cooling zone 22, extend the flow time of the fluid in the second cooling zone 22, and balance the temperature difference between the second cooling zone 22 and the first cooling zone 21.

[0156] If the heat exchange device is used to cool the battery pack, the length direction of the battery pack is usually perpendicular to the first direction, and the high heat zone of the battery pack is usually located at the end of the length direction; this embodiment sets the shunt node 251 at the end of the flow channel 27 of the second cooling zone toward the first cooling zone 21, so that the fluid can first pass through the high heat zone of the battery pack and cool down the high heat zone, thereby improving the cooling effect of the second cooling zone 22 on the battery pack.

[0157] Please continue to refer to the attached Figure 3 , Attachment Figure 5 and attached Figure 6 , the flow node 251 of the second cooling zone 22 divides the flow channel 27 of the second cooling zone into a third flow channel 271 and a fourth flow channel 272. The third flow channel 271 is located on the side of the fourth flow channel 272 close to the first cooling zone 21; the length along the third flow channel 271 is less than or equal to the length along the fourth flow channel 272. In this way, the length along the fourth flow channel 272 is substantially equal to the length along the third flow channel 271, which can ensure that the flow resistance of the fluid in the two channels is similar, thereby reducing the overall pressure drop of the second cooling zone 22 and improving the cooling efficiency of the heat exchange device.

[0158] The inner diameter of the flow channel 27 of the second cooling zone may be equal or different. For example, the flow channel 27 of the second cooling zone includes a second necking section 273, wherein the second necking section 273 may be an attached Figure 5 and attached Figure 6 The area within the dashed box.

[0159] The inner diameter of the second necking section 273 is smaller than the inner diameter of the remaining area of ​​the circulation channel 27 of the second cooling zone. The pressure drop of the circulation channel 27 of the second cooling zone is also related to the inner diameter. For example, the pressure drop of the circulation channel 27 of the second cooling zone is inversely proportional to the inner diameter. When the inner diameter of the circulation channel 27 of the second cooling zone is smaller, the pressure drop of the circulation channel 27 of the second cooling zone is greater.

[0160] When the pressure drop of the second cooling zone 22 is too small, the cooling effect of the second cooling zone 22 will be increased. Therefore, this embodiment can help form a local high flow rate area by partially reducing the inner diameter of the circulation channel 27 of the second cooling zone, so that the local pressure drop of the circulation channel 27 of the second cooling zone is restored, which is convenient for adjusting the cooling effect of the second cooling zone 22.

[0161] It should be noted that the location and length of the second necking section 273 can be reasonably set according to the requirements of the cooling effect of the heat exchange device. For example, the second necking section 273 is set in the third diverter channel 271 and / or the fourth diverter channel 272. In one example, the second necking section 273 is set in the third diverter channel 271; in another example, the second necking section 273 is set in the fourth diverter channel 272; in another example, the second necking section 273 is set in both the third diverter channel 271 and the fourth diverter channel 272. In this way, under the premise of ensuring that a local high flow rate area is formed in the circulation channel 27 of the second cooling zone, greater design flexibility can be provided for the setting of the second necking section 273, ensuring that the second cooling zone 22 can maintain a stable cooling effect under different working conditions, thereby improving the reliability and stability of the heat exchange device.

[0162] Please refer to the attached Figure 3 , Attachment Figure 7 and attached Figure 8 , the plurality of cooling zones 20 further include a third cooling zone 23, and the third cooling zone 23 is arranged on the side of the second cooling zone 22 away from the first cooling zone 21. In other words, along the first direction and away from the liquid inlet 10, the plurality of cooling zones 20 further include the first cooling zone 21, the second cooling zone 22 and the third cooling zone 23 arranged in sequence. The third cooling zone 23 is provided with three shunt nodes 251. In the first direction, two of the shunt nodes 251 are arranged on the side of the third cooling zone 23 close to the liquid inlet 10, and the other shunt node 251 is arranged on the side of the third cooling zone 23 away from the liquid inlet 10.

[0163] In this embodiment, by setting three shunt nodes 251 in the third cooling zone 23, the flow channel 28 of the third cooling zone can be divided into four shunt channels. In this way, the length of the four shunt channels can be shortened as much as possible, thereby reducing the pressure drop of the third cooling zone 23 as much as possible, thereby improving the cooling capacity of the third cooling zone 23. In addition, in the first direction, two of the shunt nodes 251 are set on the side of the third cooling zone 23 close to the liquid inlet 10, and the other shunt node 251 is set on the side of the third cooling zone 23 away from the liquid inlet 10. In this way, two of the shunt nodes 251 and the other shunt node 251 can be respectively located at the two ends of the third cooling zone 23 in the first direction. In this way, the high-temperature area of ​​the battery pack can be quickly cooled, thereby improving the safety of the battery pack.

[0164] In order to facilitate the detailed description of the location of the three diversion nodes, the third cooling zone 23 may be further refined. Figure 7 and attached Figure 8 For example, the third cooling zone 23 includes a first sub-cooling zone 231 and a second sub-cooling zone 232, and the first sub-cooling zone 231 is located on a side of the second sub-cooling zone 232 close to the second cooling zone 22, that is, the first sub-cooling zone 231 is located on one side of the second cooling zone 22 and the second sub-cooling zone 232.

[0165] Among the three flow diversion nodes 251, two flow diversion nodes 251 are located on the side of the first sub-cooling zone 231 close to the liquid inlet 10, and the other flow diversion node 251 is located on the side of the second sub-cooling zone 232 away from the liquid inlet 10. In order to further illustrate the relationship between the three flow diversion nodes 251 in the third cooling zone 23 and the flow channel, the three flow diversion nodes 251 may be recorded as a first flow diversion node, a second flow diversion node, and a third flow diversion node.

[0166] Among them, the first diversion node and the second diversion node are arranged in the first sub-cooling zone 231, and the first diversion node divides the flow channel 28 of the third cooling zone into a first diversion branch 281 and a second diversion branch 282. Part of the fluid flows to the first sub-cooling zone 231 through the first diversion branch 281, and part of the fluid flows to the second sub-cooling zone 232 through the second diversion branch 282.

[0167] Please refer to the attached Figure 7 The second flow diversion node is arranged in the first sub-cooling zone 231 and on the first flow diversion branch 281 to separate the flow channel located in the first sub-cooling zone into a fifth flow diversion channel 283 and a sixth flow diversion channel 284 .

[0168] Please refer to the attached Figure 8The third flow diversion node is arranged in the second sub-cooling zone 232 and on the second flow diversion branch 282 to divide the flow channel located in the second sub-cooling zone into a seventh flow diversion channel 285 and an eighth flow diversion channel 286 .

[0169] In this way, by setting three shunt nodes 251 in the third cooling zone 23, the flow channel 28 of the third cooling zone can be divided into a fifth shunt channel 283, a sixth shunt channel 284, a seventh shunt channel 285 and an eighth shunt channel 286. In this way, the length of each shunt channel in the third cooling zone can be shortened as much as possible, thereby reducing the pressure drop of the third cooling zone 23 as much as possible, thereby improving the cooling capacity of the third cooling zone 23. In addition, the first sub-cooling zone 231 and the second sub-cooling zone 232 are symmetrically arranged relative to the second direction, so that the preparation process of the heat exchange device 100 can be simplified and the production cost can be reduced.

[0170] Please refer to the attached Figure 3 , Attachment Fig. 9 and attached Fig.10 The plurality of cooling zones 20 further include a fourth cooling zone 24, which is disposed on a side of the third cooling zone 23 away from the first cooling zone 21. The third cooling zone is provided with six flow diversion nodes 251, three flow diversion nodes 251 are disposed on a side of the fourth cooling zone 24 close to the liquid inlet 10, and the other three flow diversion nodes 251 are disposed on a side of the fourth cooling zone 24 away from the liquid inlet 10.

[0171] In this embodiment, six flow diversion nodes 251 are arranged in the fourth cooling zone 24, so that the flow channel 29 of the fourth cooling zone can be divided into six flow diversion channels; compared with the third cooling zone 23, the flow channel 29 of the fourth cooling zone is divided into more flow diversion channels. In this way, the length of the six flow diversion channels can be shortened as much as possible, thereby reducing the pressure drop of the fourth cooling zone 24 as much as possible, improving the cooling capacity of the fourth cooling zone 24, and thus balancing the cooling capacities of the first cooling zone 21, the second cooling zone 22, the third cooling zone 23 and the fourth cooling zone 24.

[0172] In addition, in the first direction, three of the shunt nodes 251 are arranged on a side of the fourth cooling zone 24 close to the liquid inlet 10, and the other three shunt nodes 251 are arranged on a side of the fourth cooling zone 24 away from the liquid inlet 10. In this way, three of the shunt nodes 251 and the other three shunt nodes 251 are respectively located at the two ends of the fourth cooling zone 24 in the first direction. In this way, the high-temperature area of ​​the battery can be quickly cooled, thereby improving the safety of the battery pack.

[0173] Please refer to the attached Figure 3 , Attachment Fig. 9 and attached Fig.10The fourth cooling zone 24 includes a third sub-cooling zone 241 and a fourth sub-cooling zone 242. Among the six shunt nodes, three shunt nodes are located on the side of the third sub-cooling zone 241 close to the liquid inlet 10 to divide the flow channel located in the third sub-cooling zone 241 into a ninth shunt channel 291, a tenth shunt channel 292 and an eleventh shunt channel 293; the other three shunt nodes are located on the side of the fourth sub-cooling zone 242 away from the liquid inlet 10 to divide the flow channel located in the fourth sub-cooling zone into a twelfth shunt channel 294, a thirteenth shunt channel 295 and a fourteenth shunt channel 296; in this way, the number of flow channels in the third sub-cooling zone 241 and the fourth sub-cooling zone 242 is the same, which can ensure the balance of the cooling capacity of the third sub-cooling zone 241 and the fourth sub-cooling zone 242.

[0174] Please continue to refer to the attached Figure 3 , in the first direction, the areas of the first cooling zone 21, the second cooling zone 22, the third cooling zone 23 and the fourth cooling zone 24 gradually increase. As the distance between the second cooling zone 22, the third cooling zone 23 and the fourth cooling zone 24 and the liquid inlet 10 becomes larger and larger, the cooling capacity of the second cooling zone 22, the third cooling zone 23 and the fourth cooling zone 24 is relatively weakened. Therefore, in this embodiment, by gradually increasing the areas of the second cooling zone 22, the third cooling zone 23 and the fourth cooling zone 24, the heat exchange time of the fluid in the second cooling zone 22, the third cooling zone 23 and the fourth cooling zone 24 and the battery can be extended, and the cooling effect of the heat exchange device 100 is gradually improved.

[0175] In one possible implementation, please refer to the attached Figure 3 The heat exchange device 100 of the embodiment of the present application further includes a liquid inlet area 50, through which the liquid inlet 10 is connected to each cooling zone 20. The provision of the liquid inlet area 50 can, on the one hand, achieve uniform distribution of the fluid before entering each cooling zone 20, ensuring that each cooling zone can obtain sufficient flow, thereby improving the cooling efficiency of the heat exchange device; on the other hand, it can optimize the fluid flow path, reduce flow resistance, and improve the fluid mechanics performance of the heat exchange device 100.

[0176] In a possible implementation, the liquid inlet area 50 includes a plurality of liquid inlet channels, and the plurality of liquid inlet channels are correspondingly connected to a plurality of cooling areas 20. That is, the number of cooling areas 20 is equal to the number of liquid inlet channels, and one cooling area 20 is connected to the liquid inlet 10 through at least one liquid inlet channel.

[0177] For example, please refer to the attached Figure 3 To Attachment Fig.10The plurality of liquid inlet channels include a first liquid inlet channel 51, a second liquid inlet channel 52 and a third liquid inlet channel 53. The liquid inlet 10 is connected to the first cooling zone 21 through the first liquid inlet channel 51; the liquid inlet 10 is connected to the second cooling zone 22 through the second liquid inlet channel 52; and the liquid inlet is connected to the third cooling zone 23 through the third liquid inlet channel 53.

[0178] The plurality of liquid inlet branch channels include a fourth liquid inlet channel 54 , and the fourth liquid inlet channel 54 includes a liquid inlet main channel 541 , a first liquid inlet branch channel 542 , a second liquid inlet branch channel 543 and a third liquid inlet branch channel 544 .

[0179] Please refer to the attached Fig. 9 One end of the main liquid inlet path 541 is connected to the liquid inlet port 10 and extends along the second direction. The first liquid inlet branch 542, the second liquid inlet branch 543 and the third liquid inlet branch 544 are respectively connected to the main liquid inlet path 541 and are arranged in sequence in a direction away from the cooling zone 20.

[0180] In other words, three branching nodes are provided at the other end of the main liquid inlet path 541 to divide the main liquid inlet path 541 into three branches. For example, the three branching nodes divide the main liquid inlet path 541 into a first liquid inlet branch 542, a second liquid inlet branch 543, and a third liquid inlet branch 544. The second liquid inlet branch 543 is provided on a side of the first liquid inlet branch 542 away from the cooling zone 20; the third liquid inlet branch 544 is provided on a side of the second liquid inlet branch 543 away from the cooling zone 20.

[0181] The first liquid inlet branch 542 is connected to the third sub-cooling zone 241 , and the second liquid inlet branch 543 and the third liquid inlet branch 544 are both connected to the fourth sub-cooling zone 242 .

[0182] In view of the fact that the total distance along which the fluid flows in the fourth cooling zone 24 will be longer, it is necessary to further reduce the pressure drop in the fourth cooling zone 24. Therefore, in this embodiment, three diversion nodes are set on the fourth liquid inlet channel 54 to divide the main liquid inlet path 541 into three branches, so that the fourth cooling zone 24 meets the design principle that the earlier the diversion, the lower the pressure drop, and thus the fourth cooling zone 24 meets the cooling flow requirement, ensuring that the cooling capacity of the fourth cooling zone 24 is as balanced as possible with the cooling capacity of other cooling zones 20.

[0183] It should be noted that, in order to facilitate the layout of the liquid inlet flow channels of each cooling zone 20, the present embodiment divides the liquid inlet zone 50. Exemplarily, the liquid inlet zone 50 includes a first liquid inlet zone and a second liquid inlet zone; the first liquid inlet zone is located on one side of the plurality of cooling zones 20 in the first direction and is connected to the liquid inlet; the second liquid inlet zone is located on the first side of the plurality of cooling zones 20 in the second direction and is connected to the first liquid inlet zone; the second direction intersects the first direction. With such a configuration, the flow path of the fluid in the heat exchange device can be better controlled, so that the fluid can enter each cooling zone 20 evenly, thereby improving the cooling effect of the heat exchange device 100.

[0184] The main liquid inlet path 541 is arranged in the first liquid inlet area, and the first liquid inlet branch path 542, the second liquid inlet branch path 543 and the third liquid inlet branch path 544 are arranged in the second liquid inlet area. In this way, each liquid inlet branch path can be better arranged.

[0185] It should be noted that the second liquid inlet channel 52 and the third liquid inlet channel 53 are L-shaped, which helps to layout in the first liquid inlet area and the second liquid inlet area, and reduces the layout complexity of each channel in the heat exchange device 100.

[0186] In one possible implementation, please refer to the attached Figure 3 The heat exchange device 100 further includes a liquid return port 60, which is located on the same side of the cooling zone 20 as the liquid inlet 10 and is connected to the liquid return end of each cooling zone 20. The fluid enters the liquid inlet end of each cooling zone 20 through the liquid inlet 10, then circulates in each cooling zone 20, and finally flows back to the liquid return port 60 through the liquid outlet end of each cooling zone 20.

[0187] Among them, the liquid return port 60 and the liquid inlet 10 are located on the same side of the cooling zone 20. On the one hand, it can facilitate the layout of each cooling zone 20, reduce the complexity of the arrangement of the flow pipes in each cooling zone 20, and thus reduce the difficulty of preparing the heat exchange device; on the other hand, it can also facilitate matching with the water circuit of the vehicle, thereby improving the applicability of the heat exchange device.

[0188] It should be noted that the liquid return port 60 may include one liquid return main branch or multiple liquid return main branches. Exemplarily, the liquid return port 60 has multiple liquid return main branches, and the number of liquid return main branches matches the number of cooling zones 20.

[0189] In a possible implementation, in the first direction, except for the cooling zone 20 closest to the liquid inlet 10, the flow channels of the remaining cooling zones 20 are provided with at least one confluence node 252. It should be noted that, since the cooling zone 20 closest to the liquid inlet 10 may not be provided with the diversion node 251, the confluence node 252 may not be provided in the cooling zone 20.

[0190] In the first direction away from the liquid inlet 10, in any two adjacent cooling zones 20, the number of confluence nodes 252 in the cooling zone 20 close to the liquid inlet 10 is less than or equal to the number of confluence nodes 252 in the cooling zone 20 away from the liquid inlet.

[0191] For example, please refer to the attached Figure 3 To Attachment Fig.10 One confluence node 252 is provided in the first cooling zone 21 , one confluence node 252 is provided in the second cooling zone 22 , two confluence nodes 252 are provided in the third cooling zone 23 , and four confluence nodes 252 are provided in the fourth cooling zone 24 .

[0192] It should be noted that, in this embodiment, the converging node 252 where the liquid finally converges and flows out of the cooling zone is referred to as the liquid return end of the cooling zone.

[0193] It should be understood that the liquid return end of each cooling zone 20 can be directly connected to the liquid return port 60 or indirectly connected. Exemplarily, the heat exchange device 100 also includes a liquid return zone 70, and the liquid return zone 70 includes a plurality of liquid return channels; the liquid return ends of the plurality of cooling zones 20 are connected to the liquid return port 60 through the corresponding liquid return channels. In this way, the liquid return zone 70 can effectively collect the liquid return from each cooling zone 20, ensure the uniformity of the liquid return, avoid the imbalance of the liquid flow between the cooling zones 20, and improve the overall cooling effect of the heat exchange device.

[0194] Among them, at least part of the liquid return area 70 is located on the second side of the cooling area 20 along the second direction, and the second direction intersects the first direction. In this way, in the second direction, the liquid inlet area 50 and the liquid return area 70 are respectively located on both sides of the second direction, which can make the layout of each area of ​​the heat exchange device more compact.

[0195] In one possible implementation, the plurality of liquid return flow channels include a first liquid return flow channel 71 and a second liquid return flow channel 72; the first liquid return flow channel 71 is connected to the first cooling zone 21, that is, the first liquid return flow channel 71 is connected to the liquid outlet end and the liquid return port 60 of the first cooling zone 21; the second liquid return flow channel 72 is connected to the second cooling zone 22, that is, the second liquid return flow channel 72 is connected to the liquid outlet end and the liquid return port 60 of the second cooling zone 22.

[0196] The multiple liquid return channels also include a third liquid return channel 73, which includes a first liquid return branch 731, a second liquid return branch 732 and a first liquid return main channel 733; the first liquid return branch 731 and the second liquid return branch 732 extend along the first direction and are arranged in sequence along the second direction; the first liquid return main channel 733 extends along the second direction.

[0197] The first sub-cooling zone 231 is connected to the first liquid return main path 733 through the first liquid return branch 731; the second sub-cooling zone 232 is connected to the first liquid return main path 733 through the second liquid return branch 732; and further connected to the liquid return port 60 through the first liquid return main path 733. The second direction intersects the first direction.

[0198] The plurality of liquid return flow channels further include a fourth liquid return flow channel 74 , and the fourth liquid return flow channel includes a third liquid return branch 741 , a fourth liquid return branch 742 , a fifth liquid return branch 743 and a second liquid return main channel 744 .

[0199] The third liquid return branch 741, the fourth liquid return branch 742, and the fifth liquid return branch 743 are arranged in sequence in a direction away from the cooling zone 20, and all extend in the first direction; the second liquid return main path 744 extends in the second direction;

[0200] The third liquid return branch 741 connects the third sub-cooling zone 241 and the second liquid return main path 744, and the fourth liquid return branch 742 and the fifth liquid return branch 743 connect the fourth sub-cooling zone 242 and the second liquid return main path 744. Then, they are connected to the liquid return port 60 through the second liquid return main path 744.

[0201] This embodiment is connected to each cooling zone 20 through an independent liquid return channel, which can ensure uniform liquid return for each cooling zone, further ensure that the pressure drop of each cooling zone 20 along the first direction gradually decreases, thereby gradually increasing the heat exchange time between each cooling zone 20 and the battery pack, which is beneficial to ensure that the cooling capacity of each cooling zone 20 is more balanced.

[0202] It should be noted that, in order to facilitate the layout of the liquid return of each cooling zone 20, the present embodiment divides the liquid return zone 70. The liquid return zone 70 in the present embodiment includes a first liquid return zone and a second liquid return zone.

[0203] The first liquid return zone is located on one side of the plurality of cooling zones in the first direction; the second liquid return zone is located on the second side of the plurality of cooling zones in the second direction and is connected to the first liquid return zone.

[0204] In this way, the second liquid return flow channel 72, the third liquid return flow channel 73 and the fourth liquid return flow channel 74 can be an L-shaped structure, which is convenient for the layout of each liquid return flow channel.

[0205] In one possible implementation, please refer to the attached Figure 2 The heat exchange device 100 further includes a temperature averaging plate 40, a flow channel plate 30, a first joint 80, and a second joint 90; the flow channel plate 30 is disposed on the temperature averaging plate 40, and the cooling area 20, the liquid inlet area 50, and the liquid return area 70 are formed on the flow channel plate 30; illustratively, the upper part can be formed on the flow channel plate 30 by a stamping process. Afterwards, the flow channel plate 30 is welded to the temperature averaging plate 40 by a brazing or laser welding process.

[0206] The first joint 80 and the second joint 90 are both disposed on the temperature homogenizing plate 40, and the first joint 80 and the second joint 90 are located on the same side of the cooling zone 20, the first joint 80 is connected to the liquid inlet 10, and the second joint 90 is connected to the liquid return port 60. In this embodiment, the first joint 80 and the second joint 90 can be straight pipes or curved pipes, and the first joint 80 and the second joint 90 can be prepared by machining or casting.

[0207] The present application also provides a battery pack, please refer to the attached Fig.11 , multiple battery packs 200 and the heat exchange device 100 described in any of the above embodiments; each battery pack 200 may also include a plurality of battery cells arranged in sequence along the second direction.

[0208] Among them, multiple battery packs 200 are arranged in sequence along the first direction, and the cooling zone 20 of the heat exchange device 100 corresponds to each battery pack 200. Exemplarily, the number of battery packs 200 is the same as the number of cooling zones 20. For example, the number of battery packs 200 and cooling zones 20 is four. Along the first direction, the first cooling zone 21 is used to cool the first battery pack 200; the second cooling zone 22 is used to cool the second battery pack 200; the third cooling zone 23 is used to cool the third battery pack 200; and the fourth cooling zone 24 is used to cool the fourth battery pack 200.

[0209] In this embodiment, the heat exchange device 100 can be disposed on the top surface of the plurality of battery packs 200, or on the bottom surface of the plurality of battery packs 200. In order to improve the connection stability between the heat exchange device 100 and the battery pack 200, various mounting holes or mounting columns can be provided in the non-flow channel area of ​​the flow channel plate, and bolts are used to achieve a fixed connection between the two.

[0210] In this embodiment, each cooling zone 20 cools a single battery pack 200, which can ensure the temperature uniformity of the battery pack 200 in the width direction. At the same time, the cooling capacity of each cooling zone 20 of the heat exchange device 100 is relatively uniform, so that the temperature uniformity between each battery pack can be improved.

[0211] It should be noted that when a heat source is introduced into the interface of the heat exchange device 100, the battery pack can also be heated to prevent the battery pack from being overcooled.

[0212] An embodiment of the present application further provides an electrical device, including an electrical device and a battery pack as described in any of the above embodiments, wherein the battery pack is used to provide electrical energy to the electrical device.

[0213] The electrical equipment in the embodiments of the present application may be a vehicle, for example, a vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Accordingly, the electrical device may be a driving mechanism of the vehicle or a control system of the vehicle.

[0214] 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.

[0215] In view of the fact that the electric device in this embodiment includes the battery pack described in any of the above embodiments, the electric device includes the battery pack structure and beneficial effects, and this embodiment will not be further described here.

[0216] 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.

[0217] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0218] 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 it. 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 replace some or all of the technical features therein with equivalents. However, 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 application.

Claims

1. A heat exchange device, characterized in that: It comprises a liquid inlet and a plurality of cooling zones, wherein the plurality of cooling zones are arranged in sequence along a first direction, and each of the cooling zones is provided with a flow channel; in the first direction, the liquid inlet is located at one side of the plurality of cooling zones, and is respectively connected with a liquid inlet end of each cooling zone; In the first direction, except for the cooling zone closest to the liquid inlet, the flow channels of the remaining cooling zones are provided with at least one diversion node; in the first direction and in the direction away from the liquid inlet, the number of the diversion nodes in the multiple cooling zones tends to increase.

2. The heat exchange device according to claim 1, characterized in that: In the first direction and in the direction away from the liquid inlet, in any two adjacent cooling zones, the number of diversion nodes in the cooling zone close to the liquid inlet is less than or equal to the number of diversion nodes in the cooling zone away from the liquid inlet.

3. The heat exchange device according to claim 2, characterized in that: In the first direction and in the direction away from the liquid inlet, the number of the flow dividing nodes in the cooling zones among the plurality of cooling zones, except the cooling zone closest to the liquid inlet, gradually increases.

4. The heat exchange device according to claim 2, characterized in that: In the first direction and in the direction away from the liquid inlet, the number of the flow splitting nodes in the cooling zone closest to the liquid inlet and the cooling zone second closest to the liquid inlet among the plurality of cooling zones is equal; The number of the flow diversion nodes in the remaining cooling zones gradually increases.

5. The heat exchange device according to any one of claims 1 to 4, characterized in that: When the number of the flow-dividing nodes in any two adjacent cooling zones is equal, the flow channel of each cooling zone includes at least two flow-dividing channels; The length along the flow diversion channel in the cooling zone close to the liquid inlet is shorter than the length along the flow diversion channel in the cooling zone far from the liquid inlet.

6. The heat exchange device according to any one of claims 1 to 4, characterized in that: In the first direction, except for the cooling zone closest to the liquid inlet, the remaining cooling zones among the plurality of cooling zones are provided with at least one confluence node; in the first direction, each cooling zone includes a first edge and a second edge arranged opposite to each other, and the first edge is located between the liquid inlet and the second edge; Among the plurality of cooling zones, except the cooling zone closest to the liquid inlet, in any other two adjacent cooling zones, the distance between the confluence node in the cooling zone close to the liquid inlet and the first edge is a first distance, and the distance between the confluence node in the cooling zone far from the liquid inlet and the first edge is a second distance; The first distance is less than or equal to the second distance.

7. The heat exchange device according to any one of claims 1 to 4, characterized in that: Each of the cooling zones also includes a confluence node; In the first direction, the flow dividing node of each cooling zone is arranged at at least one end of the cooling zone; The confluence nodes of at least some of the cooling zones among the plurality of cooling zones are arranged in the middle of the cooling zone.

8. The heat exchange device according to any one of claims 1 to 4, characterized in that: In the first direction and in a direction away from the liquid inlet, the inner diameters of the flow channels of the plurality of cooling zones tend to increase.

9. The heat exchange device according to claim 8, characterized in that: In the first direction and in a direction away from the liquid inlet, the inner diameters of the flow channels of the plurality of cooling zones gradually increase; Alternatively, in the first direction away from the liquid inlet, in any two adjacent cooling zones, the inner diameter of the flow channel in the cooling zone close to the liquid inlet is less than or equal to the inner diameter of the flow channel in the cooling zone away from the liquid inlet.

10. The heat exchange device according to any one of claims 1 to 4, characterized in that: The plurality of cooling zones include a first cooling zone, which is the cooling zone closest to the liquid inlet; the first cooling zone is provided with a flow diversion node.

11. The heat exchange device according to claim 10, characterized in that: The flow splitting node divides the flow channel of the first cooling zone into a first flow splitting channel and a second flow splitting channel; The first shunt channel is located on a side of the second shunt channel close to the liquid inlet, and the length along the first shunt channel is shorter than the length along the second shunt channel.

12. The heat exchange device according to claim 11, characterized in that: The flow channel of the first cooling zone comprises a first necking section, and the inner diameter of the first necking section is smaller than the inner diameter of the remaining area of ​​the flow channel of the first cooling zone.

13. The heat exchange device according to claim 12, characterized in that: The flow channel of the first cooling zone further includes a converging channel, which is communicated with the first diverting channel and the second diverting channel; the first necking section is arranged in at least one of the first diverting channel, the second diverting channel and the converging channel.

14. The heat exchange device according to any one of claims 1 to 4, characterized in that: The plurality of cooling zones further include a first cooling zone and a second cooling zone arranged along the first direction, and the second cooling zone is arranged on a side of the first cooling zone away from the liquid inlet; The second cooling zone is provided with a diversion node, and the diversion node is arranged at the end of the flow channel of the second cooling zone facing the first cooling zone.

15. The heat exchange device according to claim 14, characterized in that: The flow dividing node of the second cooling zone divides the flow channel of the second cooling zone into a third flow dividing channel and a fourth flow dividing channel; The third diversion channel is located on a side of the fourth diversion channel close to the first cooling zone, and the length along the third diversion channel is less than or equal to the length along the fourth diversion channel.

16. The heat exchange device according to claim 15, characterized in that: The flow channel of the second cooling zone comprises a second necking section, and the inner diameter of the second necking section is smaller than the inner diameter of the remaining area of ​​the flow channel.

17. The heat exchange device according to claim 16, characterized in that: The second necking section is arranged in the third diverter channel and / or the fourth diverter channel.

18. The heat exchange device according to any one of claims 1 to 4, characterized in that: Along the first direction and away from the liquid inlet, the plurality of cooling zones further include a first cooling zone, a second cooling zone and a third cooling zone arranged in sequence; The third cooling zone is provided with three diversion nodes; in the first direction, two of the diversion nodes are arranged on a side of the third cooling zone close to the liquid inlet, and the other diversion node is arranged on a side of the third cooling zone away from the liquid inlet.

19. The heat exchange device according to claim 18, characterized in that: The third cooling zone includes a first sub-cooling zone and a second sub-cooling zone, wherein the first sub-cooling zone is located on a side of the second sub-cooling zone close to the second cooling zone; Among the three flow splitting nodes, two of the flow splitting nodes are located on a side of the first sub-cooling zone close to the liquid inlet, and the other flow splitting node is located on a side of the second sub-cooling zone away from the liquid inlet.

20. The heat exchange device according to any one of claims 1 to 4, characterized in that: Along the first direction and away from the liquid inlet, the plurality of cooling zones further include a first cooling zone, a second cooling zone, a third cooling zone and a fourth cooling zone arranged in sequence; The third cooling zone is provided with six diversion nodes. In the first direction, three of the diversion nodes are arranged on a side of the fourth cooling zone close to the liquid inlet, and the other three of the diversion nodes are arranged on a side of the fourth cooling zone away from the liquid inlet.

21. The heat exchange device according to claim 20, characterized in that: The fourth cooling zone includes a third sub-cooling zone and a fourth sub-cooling zone; Among the six flow diversion nodes, three of them are located on a side of the third sub-cooling zone close to the liquid inlet, and the other three of them are located on a side of the fourth sub-cooling zone away from the liquid inlet.

22. The heat exchange device according to claim 21, characterized in that: Along the first direction, areas of the first cooling zone, the second cooling zone, the third cooling zone and the fourth cooling zone gradually increase.

23. The heat exchange device according to claim 21 or 22, characterized in that: The heat exchange device further comprises a liquid inlet area, and the liquid inlet is connected to each of the cooling areas through the liquid inlet area.

24. The heat exchange device according to claim 23, characterized in that: The liquid inlet area includes a plurality of liquid inlet channels, and the plurality of liquid inlet channels are correspondingly connected to the plurality of cooling areas.

25. The heat exchange device according to claim 24, characterized in that: The plurality of liquid inlet flow channels include a first liquid inlet flow channel, a second liquid inlet flow channel and a third liquid inlet flow channel; The liquid inlet is in communication with the first cooling zone through the first liquid inlet channel; The liquid inlet is in communication with the second cooling zone through the second liquid inlet channel; The liquid inlet is communicated with the third cooling zone through the third liquid inlet channel.

26. The heat exchange device according to claim 24 or 25, characterized in that: The plurality of liquid inlet flow channels include a fourth liquid inlet flow channel, the fourth liquid inlet flow channel includes a liquid inlet main path and a first liquid inlet branch path, a second liquid inlet branch path and a third liquid inlet branch path; the liquid inlet main path is connected to the liquid inlet port and extends along the second direction; the first liquid inlet branch path, the second liquid inlet branch path and the third liquid inlet branch path are respectively connected to the liquid inlet main path and are arranged in sequence in a direction away from the cooling zone; Wherein, the first liquid inlet branch is connected to the third sub-cooling zone; the second liquid inlet branch and the third liquid inlet branch are both connected to the fourth sub-cooling zone.

27. The heat exchange device according to claim 26, characterized in that: The liquid inlet area includes a first liquid inlet area and a second liquid inlet area; the first liquid inlet area is located on one side of the plurality of cooling areas in the first direction and is connected to the liquid inlet; The second liquid inlet area is located on a first side of the plurality of cooling areas in a second direction and is connected to the first liquid inlet area; the second direction intersects the first direction.

28. The heat exchange device according to claim 27, characterized in that: The main liquid inlet path is arranged in the first liquid inlet area, and the first liquid inlet branch path, the second liquid inlet branch path and the third liquid inlet branch path are arranged in the second liquid inlet area.

29. The heat exchange device according to any one of claims 1 to 4, characterized in that: The heat exchange device further comprises a liquid return port, which is located at the same side of the cooling zone as the liquid inlet and is communicated with the liquid return end of each cooling zone.

30. The heat exchange device according to claim 29, characterized in that: In the first direction, except for the cooling zone closest to the liquid inlet, the flow channels of the remaining cooling zones among the plurality of cooling zones are provided with at least one confluence node; In the first direction and away from the liquid inlet, in any two adjacent cooling zones, the number of confluence nodes in the cooling zone close to the liquid inlet is less than or equal to the number of confluence nodes in the cooling zone away from the liquid inlet.

31. The heat exchange device according to claim 30, characterized in that: The heat exchange device further comprises a liquid return area, wherein the liquid return area comprises a plurality of liquid return flow channels; The liquid return ends of the plurality of cooling zones are connected to the liquid return port through the corresponding liquid return flow channels.

32. The heat exchange device according to claim 31, characterized in that: The plurality of liquid return channels include a first liquid return channel and a second liquid return channel; the first liquid return channel connects the liquid outlet of the first cooling zone and the liquid return port, and the second liquid return channel connects the liquid outlet of the second cooling zone and the liquid return port.

33. The heat exchange device according to claim 32, characterized in that: The plurality of liquid return channels further include a third liquid return channel; the third liquid return channel includes a first liquid return branch, a second liquid return branch and a first liquid return main channel; the first liquid return branch and the second liquid return branch extend along the first direction and are arranged in sequence along the second direction; the first liquid return main channel extends along the second direction; The first sub-cooling zone is connected to the first liquid return main path through the first liquid return branch; the second sub-cooling zone is connected to the first liquid return main path through the second liquid return branch; The second direction intersects with the first direction.

34. The heat exchange device according to claim 33, characterized in that: The plurality of liquid return flow channels further include a fourth liquid return flow channel, and the fourth liquid return flow channel includes a third liquid return branch, a fourth liquid return branch, a fifth liquid return branch, and a second liquid return main channel; The third liquid return branch, the fourth liquid return branch, and the fifth liquid return branch are arranged in sequence in a direction away from the cooling zone, and all extend along the first direction; the second liquid return main path extends along the second direction; The third liquid return branch connects the third sub-cooling zone and the second liquid return main path, and the fourth liquid return branch and the fifth liquid return branch connect the fourth sub-cooling zone and the second liquid return main path.

35. The heat exchange device according to any one of claims 31 to 34, characterized in that: The liquid return area includes a first liquid return area and a second liquid return area, and the first liquid return area is located on one side of the plurality of cooling areas in the first direction; The second liquid return zone is located on a second side of the plurality of cooling zones in the second direction and is connected to the first liquid return zone.

36. The heat exchange device according to any one of claims 1 to 4, characterized in that: The heat exchange device comprises a temperature averaging plate, a flow channel plate, a first joint and a second joint; the flow channel plate is arranged on the temperature averaging plate, and the cooling area, the liquid inlet area and the liquid return area are formed on the flow channel plate; The first joint and the second joint are both arranged on the temperature equalizing plate, the first joint and the second joint are located on the same side of the cooling zone, the first joint is communicated with the liquid inlet, and the second joint is communicated with the liquid return port.

37. A battery pack, characterized in that: Comprising a plurality of battery packs and a heat exchange device according to any one of claims 1 to 36; The plurality of battery packs are arranged in sequence along a first direction, and each cooling zone of the heat exchange device corresponds to each battery pack.

38. An electrical device, characterized in that: It comprises an electrical device and the battery pack as described in claim 37; the battery pack is electrically connected to the electrical device and is used to provide electrical energy to the electrical device.

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