Heat exchange system, battery pack and control method of battery pack

Abstract

The invention provides a heat exchange system, a battery pack and a control method of the battery pack. The heat exchange system comprises a first heat exchange part and a second heat exchange part, the first heat exchange part comprises a first liquid inlet confluence channel and at least one first heat exchange channel, and the first liquid inlet confluence channel extends in the first direction and communicates with the at least one first heat exchange channel; the second heat exchange part is located on one side of the first heat exchange part in the second direction and forms a heat exchange space with the first heat exchange part, and the heat exchange space is used for containing a battery module; a second liquid inlet confluence channel and at least one second heat exchange channel, the second liquid inlet confluence channel extends in the first direction, and the at least one second heat exchange channel is communicated; the orthographic projection of the liquid inlet end of the second liquid inlet confluence channel on the first heat exchange piece and the liquid inlet end of the first liquid inlet confluence channel are oppositely arranged in the first direction. The first direction is perpendicular to the second direction, and the second direction is perpendicular to the direction of the first heat exchange piece. The balance of the heat exchange capacity of the heat exchange system can be improved.

Description

Technical Field

[0001] This application relates to the field of energy storage, and particularly to a heat exchange system, a battery pack, and a control method thereof. Background Art

[0002] A battery pack is a device that converts chemical energy into electrical energy and is widely used in fields such as new energy vehicles and energy storage power stations. A battery pack usually includes a housing and a plurality of battery groups disposed within the housing. When the plurality of battery groups are operating, a large amount of heat is generated, and a heat exchange system is usually provided within the housing to dissipate heat from the battery groups.

[0003] However, the layout of the heat exchange flow channels of the current heat exchange system is unreasonable, resulting in poor temperature uniformity of the battery pack, thereby reducing the service life and safety of the battery pack. Summary of the Invention

[0004] Embodiments of this application provide a heat exchange system, a battery pack, and a control method thereof, which can reasonably layout the heat exchange channels of the heat exchange system and improve the temperature uniformity of the battery pack.

[0005] In a first aspect, an embodiment of this application provides a heat exchange system, including:

[0006] A first heat exchange member, the first heat exchange member includes a first liquid inlet manifold channel and at least one first heat exchange channel, the first liquid inlet manifold channel extends along a first direction and is in communication with the at least one first heat exchange channel;

[0007] A second heat exchange member, the second heat exchange member is located on one side of the first heat exchange member in a second direction and forms a heat exchange space with the first heat exchange member, the heat exchange space is used to accommodate a battery module; the second liquid inlet manifold channel and at least one second heat exchange channel, the second liquid inlet manifold channel extends along the first direction and is in communication with the at least one second heat exchange channel; and the liquid inlet end of the second liquid inlet manifold channel is disposed opposite to the liquid inlet end of the first liquid inlet manifold channel along the first direction in the orthographic projection of the first heat exchange member;

[0008] The first direction and the second direction are perpendicular to each other, and the second direction is perpendicular to the first heat exchange member.

[0009] In a possible implementation manner, the first heat exchange member further includes a first liquid outlet manifold channel, and the first liquid outlet manifold channel is in communication with the at least one first heat exchange channel;

[0010] Wherein, the liquid outlet end of the first liquid outlet manifold channel and the liquid inlet end of the first liquid inlet manifold channel are located on the same side.

[0011] In a possible implementation, the second heat exchange member further includes a second liquid outlet converging channel, and the second liquid outlet converging channel communicates with the at least one second heat exchange channel;

[0012] Wherein, the liquid outlet end of the second liquid outlet converging channel and the liquid inlet end of the second liquid inlet converging channel are located on the same side.

[0013] In a possible implementation, the heat exchange system further includes a first joint assembly, the first joint assembly includes a first liquid inlet joint and a first liquid outlet joint, and the first liquid inlet joint is communicated with the liquid inlet end of the first liquid inlet converging channel through a first communication pipeline;

[0014] The first liquid outlet joint is communicated with the liquid outlet end of the first liquid outlet converging channel.

[0015] In a possible implementation, the heat exchange system further includes a second joint assembly, the second joint assembly includes a second liquid inlet joint and a second liquid outlet joint, and the second liquid inlet joint is communicated with the liquid inlet end of the second liquid inlet converging channel through a second communication pipeline;

[0016] The second liquid outlet joint is communicated with the liquid outlet end of the second liquid outlet converging channel.

[0017] In a possible implementation, after the second heat exchange member rotates 180 degrees around the second direction and then rotates 180 degrees around the first direction, it overlaps with the first heat exchange member.

[0018] In a possible implementation, in the first direction, the first joint assembly and / or the second joint assembly are located on a side of the battery module away from the center of the heat exchange system.

[0019] In a second aspect, an embodiment of the present application provides a battery pack, including a battery module and the heat exchange system described in the first aspect; the battery module is disposed in the heat exchange space of the heat exchange system and exchanges heat with the heat exchange system.

[0020] In a third aspect, an embodiment of the present application provides a control method for a battery pack, the control method is used to control the battery pack described in the second aspect, and the battery pack includes a battery module and a heat exchange system; the control method includes:

[0021] Obtain the first temperature of each battery cell in the battery module, determine the maximum value and the minimum value of the first temperature, and the first temperature difference between the maximum value and the minimum value of the first temperature;

[0022] Judge whether the maximum value of the first temperature is greater than a preset temperature;

[0023] If the maximum value of the first temperature is greater than the preset temperature, continue to determine whether the first temperature difference is less than or equal to the first threshold temperature difference;

[0024] If the first temperature difference is less than or equal to the first threshold temperature difference, start the water pump of the heat exchange system so that the heat exchange system exchanges heat with the battery module.

[0025] In a possible implementation manner, the control method further includes:

[0026] After the water pump of the heat exchange system is started for a preset time, continue to obtain the second temperature of each battery cell in the battery module and determine the second temperature difference of the battery module;

[0027] Determine whether the second temperature difference is less than or equal to a second threshold temperature difference, where the second threshold temperature difference is less than the first threshold temperature difference;

[0028] If the second temperature difference is greater than the second threshold temperature difference, continue to start the water pump of the heat exchange system;

[0029] If the second temperature difference is less than or equal to the second threshold temperature difference, turn off the water pump of the heat exchange system.

[0030] In the heat exchange system, battery pack and its control method provided by the embodiments of the present application, a first heat exchange member and a second heat exchange member are respectively arranged on the bottom surface and the top surface of the battery module. The first heat exchange member includes a first liquid inlet manifold channel, and the second heat exchange member includes a second liquid inlet manifold channel. The liquid inlet ends of the first liquid inlet manifold channel and the second liquid inlet manifold channel are oppositely arranged in a first direction. In this way, when heat exchange media are respectively introduced into the first liquid inlet manifold channel and the second liquid inlet manifold channel, the heat exchange media form convection in the heat exchange space, ensuring that there are heat exchange media with relatively high or low temperatures at both ends of the heat exchange space in the first direction, avoiding the temperature gradient caused by single-sided liquid inlet, and further improving the heat exchange balance of the heat exchange system.

[0031] In addition, the heat exchange system can be in contact with the top surface and the bottom surface of the battery module respectively to achieve double-sided synchronous heat exchange, increasing the heat exchange efficiency of the heat exchange system, and further improving the life and safety of the battery pack.

[0032] In addition to the technical problems solved by the embodiments of the present application described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features of the technical solutions, the other technical problems that can be solved by the heat exchange system, battery pack and its control method provided by the embodiments of the present application, the other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. Description of the Drawings

[0033] The accompanying drawings herein are incorporated into and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0034] Figure 1 Schematic structural diagram of a battery pack provided by an embodiment of the present application;

[0035] Figure 2 First azimuth view of a heat exchange system provided by an embodiment of the present application;

[0036] Figure 3 is Figure 2 Enlarged schematic view of area A in

[0037] Figure 4 Second azimuth view of a heat exchange system provided by an embodiment of the present application;

[0038] Figure 5 Schematic diagram of a second heat exchange member provided by an embodiment of the present application;

[0039] Figure 6 Flowchart of a control method for a battery pack provided by an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 1000: Battery pack;

[0042] 100: Heat exchange system;

[0043] 110: First heat exchange member; 111: First inlet liquid collecting channel; 112: First heat exchange channel; 113: First outlet liquid collecting channel;

[0044] 120: Second heat exchange member; 121: Second inlet liquid collecting channel; 122: Second heat exchange channel; 123: Second outlet liquid collecting channel;

[0045] 130: First joint assembly; 131: First inlet liquid joint; 132: First outlet liquid joint;

[0046] 140: Second joint assembly; 141: Second inlet liquid joint; 142: Second outlet liquid joint;

[0047] 200: Battery module;

[0048] 300: Thermal conductive pad.

[0049] Through the above accompanying drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These accompanying drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Description of the Invention

[0050] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0051] As described in the background art, the layout of the heat exchange flow channels in the current heat exchange system is unreasonable, resulting in poor temperature uniformity of the battery pack, thereby reducing the service life and safety of the battery pack. The reasons for these problems are as follows: In the related art, the liquid cooling plate is usually arranged on the bottom surface of the battery module, and the liquid cooling plate usually includes a heat exchange channel and an inlet and an outlet communicating with the heat exchange channel, and the number of the inlet and the outlet is one. Given that the liquid cooling plate is relatively large in size and the length of the heat exchange flow channel is relatively long, in the cooling process, the area close to the inlet has not absorbed the heat of the battery cells and has a lower temperature, while the area close to the outlet has absorbed enough heat of the battery module, resulting in a higher temperature in the area of the battery module close to the outlet, thereby leading to poor temperature uniformity of the battery pack, and further reducing the service life and safety of the battery pack.

[0052] In view of the above technical problems, the embodiments of the present application provide a heat exchange system, a battery pack and a control method thereof. By respectively arranging a first heat exchange member and a second heat exchange member on the bottom surface and the top surface of the battery module, wherein the first heat exchange member includes a first inlet manifold channel, and the second heat exchange member includes a second inlet manifold channel, and the inlet ends of the first inlet manifold channel and the second inlet manifold channel are oppositely arranged in a first direction. In this way, when the heat exchange medium is respectively introduced into the first inlet manifold channel and the second inlet manifold channel, the heat exchange medium forms a convection in the heat exchange space, ensuring that both ends of the heat exchange space in the first direction have a heat exchange medium with a relatively high or low temperature, avoiding the temperature gradient caused by single-sided liquid inlet, and further improving the heat exchange uniformity of the heat exchange system.

[0053] In addition, the heat exchange system can be in contact with the top surface and the bottom surface of the battery module respectively to achieve double-sided synchronous heat exchange, increasing the heat exchange efficiency of the heat exchange system, and further improving the service life and safety of the battery pack.

[0054] The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0055] In order to make the above objects, 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 with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0056] Please refer to Figure 1 , the embodiment of the present application provides a battery pack 1000. As an energy storage component, the battery pack 1000 can be applied to electrical equipment. For example, the battery pack 1000 can be applied to a vehicle to provide electrical energy for the vehicle to ensure the normal operation of the vehicle.

[0057] Among them, the battery pack 1000 includes a heat exchange system 100 and a battery module 200. The heat exchange system 100 exchanges heat with the battery module 200 so that the battery module 200 is within a suitable temperature range. It should be noted that in this embodiment, heat exchange can be understood as that the heat exchange system can cool down the battery module 200 or heat the battery module 200. Specifically, the temperature of the heat exchange medium in the heat exchange system can be freely selected according to the environment of the component to be heat exchanged.

[0058] The heat exchange system 100 includes a first heat exchange component 110 and a second heat exchange component 120. The first heat exchange component 110 and the second heat exchange component 120 are arranged at intervals along the second direction so that a heat exchange space is formed between the first heat exchange component 110 and the second heat exchange component 120. Among them, the second direction can be the direction perpendicular to the first heat exchange component 110, that is, the thickness direction of the first heat exchange component 110 and the second heat exchange component 120, Figure 1 the Z direction in

[0059] The battery module 200 is arranged in the heat exchange space of the heat exchange system so that in the second direction, the first heat exchange component 110 contacts and exchanges heat with one surface of the battery module 200, and the second heat exchange component 120 contacts and exchanges heat with the other surface of the battery module 200. In this way, the heat exchange system 100 can contact the top surface and the bottom surface of the battery module 200 respectively to achieve double-sided synchronous heat exchange, increasing the heat exchange efficiency of the heat exchange system 100, and further improving the life and safety of the battery pack.

[0060] It should be noted that the first heat exchanger 110 and the second heat exchanger 120 can be in direct contact with the battery module 200 respectively, or in indirect contact. Exemplarily, heat conductive pads 300 are provided between the first heat exchanger 110 and the battery module 200, and between the second heat exchanger 120 and the battery module 200. In this way, the heat conductive pads 300 can fill the gap between the contact heat exchange system 100 and the battery module 200 and reduce the contact thermal resistance, thereby further improving the heat exchange efficiency of the heat exchange system 100. Among them, the heat conductive pads 300 can be made of heat conductive glue or phase change heat conductive materials.

[0061] Please refer to Figures 2 to 5 , the first heat exchanger 110 includes a first liquid inlet manifold channel 111 and at least one first heat exchange channel 112. The first liquid inlet manifold channel 111 extends along a first direction and communicates with at least one first heat exchange channel 112 to provide a heat exchange medium for at least one first heat exchange channel 112.

[0062] At least one first heat exchange channel 112 is provided on one side of the first liquid inlet manifold channel 111 in a second direction. Wherein, the first direction is perpendicular to the second direction. Taking the shapes of the first heat exchanger 110 and the second heat exchanger 120 as rectangles as an example, the first direction can be the length direction of the first heat exchanger 110, that is Figure 1 and Figure 2 the X direction in Figure 1 and Figure 2 the Z direction in

[0063] It should be noted that when the number of the first heat exchange channels 112 is multiple, there can be multiple choices for the relative positions of the first liquid inlet manifold channel 111 and the multiple first heat exchange channels 112. As some embodiments, the multiple first heat exchange channels 112 can be provided on the same side of the first liquid inlet manifold channel 111 in the first direction. As other embodiments, the multiple first heat exchange channels 112 can be respectively provided on both sides of the first liquid inlet manifold channel 111 in the first direction. Exemplarily, the number of the first heat exchange channels 112 is eight, wherein, four first heat exchange channels 112 are provided on one side of the first liquid inlet manifold channel 111, and the other four first heat exchange channels 112 are provided on the other side of the first liquid inlet manifold channel 111 and are symmetrically arranged with respect to the first liquid inlet manifold channel 111.

[0064] Please refer to Figure 5, the second heat exchanger 120 includes a second liquid inlet manifold channel 121 and at least one second heat exchange channel 122. The second liquid inlet manifold channel 121 extends in the first direction and communicates with at least one second heat exchange channel 122. It should be understood that the relative positional relationship between the second liquid inlet manifold channel 121 and at least one second heat exchange channel 122 can refer to the relative positional relationship between the first liquid inlet manifold channel 111 and at least one first heat exchange channel 112, and this embodiment will not elaborate further here.

[0065] The liquid inlet end of the second liquid inlet manifold channel 121 is disposed opposite to the liquid inlet end of the first liquid inlet manifold channel 111 along the first direction in the orthographic projection on the first heat exchanger 110. Taking Figure 2 the shown orientation as an example, the liquid inlet end of the first liquid inlet manifold channel 111 is at the front end, and the liquid inlet end of the second liquid inlet manifold channel 121 is at the rear end.

[0066] Please refer to Figure 2 and Figure 5 , so that when the heat exchange medium is respectively introduced into the first liquid inlet manifold channel 111 and the second liquid inlet manifold channel 121, the flow direction of the heat exchange medium in the first heat exchanger 110 is as shown in Figure 2 , and the heat exchange medium in the second heat exchanger 120 is as shown by the dotted arrow in Figure 5 . In this way, the flow direction of the heat exchange medium in the first heat exchanger 110 is opposite to the flow direction of the heat exchange medium in the second heat exchanger 120, so that the heat exchange medium forms convection in the heat exchange space, ensuring that both ends of the heat exchange space in the first direction have heat exchange media with higher or lower temperatures, avoiding the temperature gradient caused by single-sided liquid inlet, and thus improving the heat exchange balance of the heat exchange system 100.

[0067] In a possible implementation manner, please continue to refer to Figure 2 and Figure 3 , the first heat exchanger 110 further includes a first liquid outlet manifold channel 113. The first liquid outlet manifold channel 113 communicates with at least one first heat exchange channel 112, and the liquid outlet end of the first liquid outlet manifold channel 113 and the liquid inlet end of the first liquid inlet manifold channel 111 are located on the same side.

[0068] Wherein, the first liquid outlet manifold channel 113 may include a first part and a second part that communicate with each other. Among them, the first part is disposed on one side of at least one first heat exchange channel 112 in the second direction, and the second part is disposed on one side of at least one first heat exchange channel 112 in the first direction.

[0069] The liquid outlet end of the first liquid outlet manifold channel 113 and the liquid inlet end of the first liquid inlet manifold channel 111 are located on the same side. In this way, the inlet and outlet of the heat exchange medium of the first heat exchange member 110 can be concentratedly arranged on the same side, avoiding the interlaced winding of pipelines in the battery pack 1000, reducing the assembly difficulty, and being suitable for the design of the compact battery pack 1000.

[0070] Please continue to refer to Figure 5 , the second heat exchange member 120 further includes a second liquid outlet manifold channel 123, and the second liquid outlet manifold channel 123 communicates with at least one second heat exchange channel 122; wherein, the liquid outlet end of the second liquid outlet manifold channel 123 and the liquid inlet end of the second liquid inlet manifold channel 121 are located on the same side. In this way, the inlet and outlet of the heat exchange medium of the second heat exchange member 120 can be concentratedly arranged on the same side, avoiding the interlaced winding of pipelines in the battery pack 1000, reducing the assembly difficulty, and being suitable for the design of the compact battery pack 1000.

[0071] In a possible implementation manner, the heat exchange system 100 further includes a first joint assembly 130. The first joint assembly 130 includes a first liquid inlet joint 131 and a first liquid outlet joint 132. The first liquid inlet joint 131 communicates with the liquid inlet end of the first liquid inlet manifold channel 111 through a first communication pipeline (not shown in the figure); the first liquid outlet joint 132 communicates with the liquid outlet end of the first liquid outlet manifold channel 113.

[0072] The heat exchange system 100 further includes a second joint assembly 140. The second joint assembly 140 includes a second liquid inlet joint 141 and a second liquid outlet joint 142. The second liquid inlet joint 141 communicates with the liquid inlet end of the second liquid inlet manifold channel 121 through a second communication pipeline (not shown in the figure); the second liquid outlet joint 142 communicates with the liquid outlet end of the second liquid outlet manifold channel 123.

[0073] It should be noted that the first communication pipeline and the second communication pipeline can be part of the existing heat exchange medium circulation pipeline of the battery pack. In this way, the existing pipeline can be used to selectively heat or cool the heat exchange medium without laying new pipelines additionally, reducing the complexity and cost of the heat exchange system 100.

[0074] In a possible implementation manner, after the second heat exchange member 120 rotates 180 degrees around the second direction and then rotates 180 degrees around the first direction, it overlaps with the first heat exchange member 110. In this way, the first heat exchange member 110 and the second heat exchange member 120 can be manufactured using the same mold, only the assembly direction needs to be adjusted, saving the mold development cost and reducing the preparation cost. In addition, the flow channel layouts of the first heat exchange member 110 and the second heat exchange member 120 are completely mirror-symmetrical, ensuring that the flow resistance of the heat exchange medium at the top and bottom is the same and avoiding temperature unevenness caused by flow channel differences.

[0075] In a possible implementation, in a first direction, the first joint assembly 130 and / or the second joint assembly 140 are located on a side of the battery module 200 away from the center of the heat exchange system 100. Exemplarily, the first joint assembly 130 is located on a side of the battery module 200 away from the center of the heat exchange system 100 in the first direction, such that the first joint assembly 130 is outside the battery module 200. In this way, it is possible to avoid stacking the first joint assembly 130 and the battery module 200 in a second direction, thereby effectively reducing the height of the battery pack 1000 in the second direction and improving the energy density of the battery pack 1000.

[0076] An embodiment of the present application further provides a control method for a battery pack. The control method is used to control the battery pack 1000 described in any of the above embodiments. The battery pack 1000 includes a battery module 200 and a heat exchange system 100; the battery module 200 includes a plurality of battery cells.

[0077] Wherein, the control method includes:

[0078] Step S100: Obtain the first temperature of each battery cell in the battery module, determine the maximum value and the minimum value of the first temperature, and the first temperature difference between the maximum value and the minimum value of the first temperature.

[0079] It should be noted that the first temperature can be obtained by a temperature sensor disposed near the battery cell.

[0080] Step S200: Determine whether the maximum value of the first temperature is greater than a preset temperature.

[0081] Wherein, the value range of the preset temperature is 35°C to 42°C.

[0082] Step S300: If the maximum value of the first temperature is greater than the preset temperature, then continue to determine whether the first temperature difference is less than or equal to a first threshold temperature difference.

[0083] Wherein, the value range of the first threshold temperature difference is 3°C to 8°C.

[0084] Step S400: If the first temperature difference is greater than the first threshold temperature difference, start the water pump of the heat exchange system so that the heat exchange system exchanges heat with the battery module.

[0085] The present application simultaneously monitors the relationship between the highest temperature and the preset temperature, and the difference between the first temperature difference and the first threshold temperature difference, and uses two monitoring mechanisms to determine whether to start the water pump of the heat exchange system, avoiding misjudgment of a single monitoring mechanism and improving the accuracy of the starting timing of the water pump of the heat exchange system.

[0086] It should be noted that when the maximum value of the first temperature is less than the preset temperature; or, when the maximum value of the first temperature is greater than the preset temperature and the first temperature difference is less than the first threshold temperature difference, the water pump of the heat exchange system may not be started.

[0087] In a possible implementation manner, the control method further includes:

[0088] After the water pump of the heat exchange system has been started for a preset time, continue to obtain the second temperature of each battery cell in the battery module and determine the second temperature difference of the battery module. It should be noted that the second temperature difference is the difference between the maximum value and the minimum value of the second temperature. And the acquisition of the second temperature is also collected by a temperature sensor.

[0089] After that, determine whether the second temperature difference is less than or equal to the second threshold temperature difference, and the second threshold temperature difference is less than the first threshold temperature difference.

[0090] If the second temperature difference is greater than the second threshold temperature difference, continue to start the water pump of the heat exchange system.

[0091] If the second temperature difference is less than or equal to the second threshold temperature difference, turn off the water pump of the heat exchange system.

[0092] Such a setting can avoid insufficient starting time of the water pump of the heat exchange system and prevent overheating or overcooling. At the same time, it can also avoid too long starting time of the water pump of the heat exchange system, reduce the ineffective operation time, and thus reduce the heat exchange cost.

[0093] The embodiment of the present application also provides an electrical device, including an electrical device and the battery pack 1000 described in any of the above embodiments. The battery pack 1000 is electrically connected to the electrical device to provide electrical energy for the electrical device. In view of the fact that the vehicle includes the battery pack 1000 described in any of the above embodiments, it has the structure and beneficial effects of the battery pack 1000, and will not be elaborated herein.

[0094] The electrical device in the embodiment of the present application may be a vehicle. For example: the vehicle may be a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Correspondingly, the electrical device may be a driving mechanism of the vehicle or a control system of the vehicle.

[0095] In addition, the electrical device may also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecrafts, etc. Among them, the spacecraft may include airplanes, rockets, space shuttles or spaceships.

[0096] The embodiments or implementation manners in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0097] It should be noted that the "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Further, when combining a specific feature, structure or characteristic with an embodiment, implementing such a feature, structure or characteristic in other embodiments, whether explicitly or implicitly described, is within the knowledge scope of those skilled in the art.

[0098] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat exchange system, characterized in that, Comprising: A first heat exchanger, the first heat exchanger includes a first liquid inlet manifold channel and at least one first heat exchange channel, the first liquid inlet manifold channel extends along a first direction and is in communication with the at least one first heat exchange channel; A second heat exchanger, the second heat exchanger is located on one side of the first heat exchanger in a second direction and forms a heat exchange space with the first heat exchanger, the heat exchange space is used to accommodate a battery module; The second liquid inlet manifold channel and at least one second heat exchange channel, the second liquid inlet manifold channel extends along the first direction and is in communication with the at least one second heat exchange channel; and the liquid inlet end of the second liquid inlet manifold channel is disposed opposite to the liquid inlet end of the first liquid inlet manifold channel along the first direction in the orthographic projection on the first heat exchanger; The first direction and the second direction are perpendicular to each other, and the second direction is a direction perpendicular to the first heat exchanger.

2. The heat exchange system according to claim 1, wherein The first heat exchanger further includes a first liquid outlet manifold channel, the first liquid outlet manifold channel is in communication with the at least one first heat exchange channel; Wherein, the liquid outlet end of the first liquid outlet manifold channel and the liquid inlet end of the first liquid inlet manifold channel are located on the same side.

3. The heat exchange system according to claim 2, wherein, The second heat exchanger further includes a second liquid outlet manifold channel, the second liquid outlet manifold channel is in communication with the at least one second heat exchange channel; Wherein, the liquid outlet end of the second liquid outlet manifold channel and the liquid inlet end of the second liquid inlet manifold channel are located on the same side.

4. The heat exchange system according to claim 3, characterized in that, The heat exchange system further includes a first joint assembly, the first joint assembly includes a first liquid inlet joint and a first liquid outlet joint, the first liquid inlet joint is in communication with the liquid inlet end of the first liquid inlet manifold channel through a first communication pipeline; The first liquid outlet joint is in communication with the liquid outlet end of the first liquid outlet manifold channel.

5. The heat exchange system according to claim 4, wherein The heat exchange system further includes a second joint assembly, the second joint assembly includes a second liquid inlet joint and a second liquid outlet joint, the second liquid inlet joint is in communication with the liquid inlet end of the second liquid inlet manifold channel through a second communication pipeline; The second liquid outlet joint is in communication with the liquid outlet end of the second liquid outlet manifold channel.

6. The heat exchange system according to any one of claims 1-5, characterized in that, After the second heat exchanger rotates 180 degrees around the second direction, and then rotates 180 degrees around the first direction to overlap with the first heat exchanger.

7. The heat exchange system according to claim 6, wherein In the first direction, the first joint assembly and / or the second joint assembly are located on the side of the battery module away from the center of the heat exchange system.

8. A battery pack, characterized in that, Comprising a battery module and the heat exchange system according to any one of claims 1-7; the battery module is disposed in the heat exchange space of the heat exchange system and exchanges heat with the heat exchange system.

9. A control method for a battery pack, characterized in that, The control method is used to control the battery pack according to claim 8, the battery pack includes a battery module and a heat exchange system; the control method includes: Obtaining the first temperature of each battery cell in the battery module, determining the maximum value and the minimum value of the first temperature, and the first temperature difference between the maximum value and the minimum value of the first temperature; Judging whether the maximum value of the first temperature is greater than a preset temperature; If the maximum value of the first temperature is greater than the preset temperature, then continue to judge whether the first temperature difference is less than or equal to a first threshold temperature difference; If the first temperature difference is greater than the first threshold temperature difference, start the water pump of the heat exchange system so that the heat exchange system exchanges heat with the battery module.

10. The control method of the battery pack according to claim 9, wherein, The control method further includes: After the water pump of the heat exchange system is started for a preset time, continue to obtain the second temperature of each battery cell in the battery module and determine the second temperature difference of the battery module; Judge whether the second temperature difference is less than or equal to a second threshold temperature difference, and the second threshold temperature difference is less than the first threshold temperature difference; If the second temperature difference is greater than the second threshold temperature difference, continue to start the water pump of the heat exchange system; If the second temperature difference is less than or equal to the second threshold temperature difference, turn off the water pump of the heat exchange system.

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