Heat exchange assembly, battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, and provides a heat exchange assembly, a battery module and a battery pack. The heat exchange assembly is used for heat exchange with the side face of the battery cell. The heat exchange assembly comprises a first liquid guide pipe, a second liquid guide pipe and a heat exchange pipe. A liquid inlet is formed in the first liquid guide pipe. And a liquid outlet is formed in the second liquid guide pipe. The second liquid guide pipes are arranged above the first liquid guide pipes at intervals in the height direction of the battery cell. The two ends of the heat exchange pipe communicate with the first liquid guide pipe and the second liquid guide pipe correspondingly. The heat exchange tube is configured to be attached to the side face of the battery cell. At least two heat exchange pipes are arranged at intervals in the first direction. Wherein the first direction is perpendicular to the height direction of the battery cell, and the first liquid guide pipe is configured to be arranged below the battery cell in the height direction of the battery cell.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a heat exchange component, a battery module and a battery pack. Background Art

[0002] In related technologies, a battery pack usually uses a liquid-cooled bottom plate to cool the battery cells by liquid cooling. The heat dissipation channels in the liquid-cooled bottom plate extend along the length direction, so as to cool each battery cell in turn. However, as the coolant continuously flows in the heat dissipation channels, the temperature of the coolant is bound to rise. This will result in better cooling effect for the battery cells near the liquid inlet, and poorer cooling effect for the battery cells far from the liquid inlet, making the temperature difference between the battery cells relatively large, which affects the consistency, capacity and energy efficiency of the battery cells. Summary of the Utility Model

[0003] Embodiments of the utility model provide a heat exchange component, a battery module and a battery pack, which can improve the technical problem of large temperature difference between battery cells during battery cell cooling or heating.

[0004] In a first aspect, an embodiment of the utility model provides a heat exchange component for heat exchange with the side surface of a battery cell. The heat exchange component includes:

[0005] A first liquid guide pipe formed with a liquid inlet;

[0006] A second liquid guide pipe formed with a liquid outlet, and along the height direction of the battery cell, the second liquid guide pipe is arranged above the first liquid guide pipe at intervals;

[0007] A heat exchange pipe, both ends of which are respectively communicated with the first liquid guide pipe and the second liquid guide pipe, and the heat exchange pipe is configured to be attached to the side surface of the battery cell. Wherein, along a first direction, the heat exchange pipes are arranged at intervals of at least two;

[0008] Wherein, the first direction is perpendicular to the height direction of the battery cell, and along the height direction of the battery cell, the first liquid guide pipe is configured to be arranged below the battery cell.

[0009] In one embodiment, along the height direction of the battery cell, the second liquid guide pipe is configured to be arranged above the battery cell.

[0010] In one embodiment, the liquid inlet is formed at one end of the first liquid guide pipe, and the liquid outlet is formed at one end of the second liquid guide pipe far from the liquid inlet.

[0011] In one embodiment, the heat exchange pipe includes at least one of a serpentine heat exchange pipe, an arc-shaped heat exchange pipe and a straight heat exchange pipe.

[0012] In one embodiment, the first liquid guide pipe extends along the first direction.

[0013] In one embodiment, the heat exchange assembly further includes:

[0014] A heat exchange plate, wherein the first liquid guide pipe, the second liquid guide pipe and the heat exchange pipe are all built in the heat exchange plate.

[0015] In one embodiment, the first liquid guide pipe, the second liquid guide pipe and the heat exchange pipe are integrally formed in the heat exchange plate.

[0016] In a second aspect, an embodiment of the present invention provides a battery module, including a battery cell and the heat exchange assembly as described above. Among them, the heat exchange pipe is attached to the side surface of the battery cell. Along the height direction of the battery cell, the first liquid guide pipe is arranged below the battery cell, and the second liquid guide pipe is arranged above the battery cell.

[0017] In one embodiment, the battery cells are provided as at least two, and each heat exchange pipe is respectively arranged on the side surface of one battery cell.

[0018] In one embodiment, the battery cells are provided as at least three, and each heat exchange pipe is respectively arranged at the connection of every two adjacent battery cells.

[0019] In a third aspect, an embodiment of the present invention provides a battery pack, including the battery module as described above.

[0020] The beneficial effects of the embodiments of the present invention:

[0021] In the embodiment of the present invention, by arranging the first liquid guide pipe below the battery cell, when the heat exchange liquid flows into the first liquid guide pipe from the liquid inlet, the heat exchange liquid will not form a heat exchange with the battery cell, so that the temperature of the heat exchange liquid in the first liquid guide pipe is basically the same. Since the second liquid guide pipe with a liquid outlet is located above the first liquid guide pipe with a liquid inlet, and the first liquid guide pipe and the second liquid guide pipe are connected through the heat exchange pipe attached to the battery cell, the circulation of the heat exchange liquid can be realized by the way of lower water inlet and upper water outlet. During the flow of the heat exchange liquid, it can rise synchronously in each heat exchange pipe, and the liquid levels in each heat exchange pipe can be kept the same during the rising process. Based on the fact that the temperature of the heat exchange liquid at each position in the first liquid guide pipe is the same, and the liquid levels of the heat exchange liquid in each heat exchange pipe rise synchronously, the temperatures of each battery cell for heat exchange can be basically kept the same, thereby improving the technical problem of large temperature difference between battery cells. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 is one of the structural schematic diagrams of the heat exchange component provided by the embodiment of the present utility model;

[0024] Figure 2 is the second structural schematic diagram of the heat exchange component provided by the embodiment of the present utility model;

[0025] Figure 3 is the third structural schematic diagram of the heat exchange component provided by the embodiment of the present utility model;

[0026] Figure 4 is the fourth structural schematic diagram of the heat exchange component provided by the embodiment of the present utility model;

[0027] Figure 5 is the fifth structural schematic diagram of the heat exchange component provided by the embodiment of the present utility model;

[0028] Figure 6 is the structural schematic diagram of the battery pack provided by the embodiment of the present utility model.

[0029] Reference numerals:

[0030] 10 - First liquid guide pipe, 110 - Liquid inlet, 20 - Second liquid guide pipe, 210 - Liquid outlet, 30 - Heat exchange pipe, 40 - Heat exchange plate, 50 - Battery cell. Detailed implementation manners

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the drawings; and "inner" and "outer" refer to the outline of the device.

[0032] Specifically, as Figures 1 to 6As shown in the figure, an embodiment of the present utility model provides a heat exchange assembly. The heat exchange assembly is used for heat exchange with the side surface of the battery cell 50. The heat exchange assembly includes a first liquid guide pipe 10, a second liquid guide pipe 20, and a heat exchange pipe 30. The first liquid guide pipe 10 is formed with a liquid inlet 110. The second liquid guide pipe 20 is formed with a liquid outlet 210. Along the height direction of the battery cell 50, the second liquid guide pipe 20 is arranged above the first liquid guide pipe 10 at intervals. Both ends of the heat exchange pipe 30 are respectively communicated with the first liquid guide pipe 10 and the second liquid guide pipe 20. The heat exchange pipe 30 is configured to be attached to the side surface of the battery cell 50. Along the first direction, the heat exchange pipes 30 are arranged at least two at intervals. Wherein, the first direction is perpendicular to the height direction of the battery cell 50, and along the height direction of the battery cell 50, the first liquid guide pipe 10 is configured to be arranged below the battery cell 50.

[0033] In some embodiments, by arranging the first liquid guide pipe 10 below the battery cell 50, when the heat exchange liquid flows into the first liquid guide pipe 10 from the liquid inlet 110, the heat exchange liquid will not form heat exchange with the battery cell 50, so that the temperature of the heat exchange liquid in the first liquid guide pipe 10 is basically the same. Since the second liquid guide pipe 20 with the liquid outlet 210 is located above the first liquid guide pipe 10 with the liquid inlet 110, and the first liquid guide pipe 10 and the second liquid guide pipe 20 are connected through the heat exchange pipe 30 attached to the battery cell 50, the circulation of the heat exchange liquid can be realized in the way of lower water inlet and upper water outlet. During the flow of the heat exchange liquid, it can rise synchronously in each heat exchange pipe 30, and the liquid levels in each heat exchange pipe 30 can be kept the same during the rising process. Based on the fact that the temperature of the heat exchange liquid at each position in the first liquid guide pipe 10 is the same, and the liquid levels of the heat exchange liquid in each heat exchange pipe 30 rise synchronously, the temperatures of heat exchange of each battery cell 50 can be basically kept the same, thus improving the technical problem of large temperature difference between battery cells 50.

[0034] In some embodiments, the heat exchange assembly is used for cooling the side surface of the battery cell 50, so as to take away the heat of the battery cell 50. At this time, the heat exchange liquid flowing in the first liquid guide pipe 10, the second liquid guide pipe 20, and the heat exchange pipe 30 is a coolant. The coolant flows into the first liquid guide pipe 10 from the liquid inlet 110. Based on the installation position of the first liquid guide pipe 10 being lower than that of the battery cell 50, the coolant hardly exchanges heat with the battery cell 50. At this time, the temperature of the coolant remains unchanged. As the coolant flows from the first liquid guide pipe 10 to each heat exchange pipe 30, the coolant can rise synchronously in each heat exchange pipe 30, so that the temperature at the same height position of each heat exchange pipe 30 in the battery cell 50 is basically the same. Thus, the cooling effect of the coolant on each battery cell 50 is the same. For each battery cell 50, the cooling temperatures of each battery cell 50 can be basically kept the same, thus improving the technical problem of large temperature difference between battery cells 50, so as to improve the consistency, capacity, and energy efficiency of the battery cells 50.

[0035] In some embodiments, the heat exchange assembly is used to heat the side surface of the battery cell 50, thereby providing heat for the battery cell 50. At this time, the heat exchange liquid flowing in the first liquid guide pipe 10, the second liquid guide pipe 20, and the heat exchange pipe 30 is the heating liquid. The heating liquid flows into the first liquid guide pipe 10 from the liquid inlet 110. Since the installation position of the first liquid guide pipe 10 is lower than that of the battery cell 50, the heating liquid hardly undergoes heat exchange with the battery cell 50. At this time, the temperature of the heating liquid remains unchanged. As the heating liquid flows from the first liquid guide pipe 10 to each heat exchange pipe 30, the liquid level of the heating liquid can rise synchronously in each heat exchange pipe 30, so that the temperature at the same height position of each heat exchange pipe 30 with respect to the battery cell 50 is basically the same. Thus, the heating effect of the heating liquid on each battery cell 50 is the same. For each battery cell 50, the heating temperature of each battery cell 50 can be basically kept consistent, thereby improving the technical problem of large temperature differences between battery cells 50, and enhancing the consistency, capacity, and energy efficiency of the battery cells 50.

[0036] Among them, the heat exchange pipe 30 is used to exchange heat with the battery cell 50. There is no heat exchange between the first liquid guide pipe 10 and the battery cell 50. The second liquid guide pipe 20 can exchange heat with the battery cell 50 or can also not exchange heat with the battery cell 50.

[0037] In some embodiments, the battery cell 50 has a first side surface in the thickness direction and a second side surface in the width direction. The heat exchange pipe 30 can be attached to the first side surface. At this time, the first direction is the thickness direction of the battery cell 50. Then, along the thickness direction of the battery cell 50, the heat exchange pipes 30 are spaced apart and arranged in at least two. For example, the heat exchange pipes 30 are arranged in two, three, four, or more numbers, and the number of heat exchange pipes 30 can be reasonably selected based on the number of battery cells 50 and the heat exchange requirements. The heat exchange pipe 30 can also be attached to the second side surface. At this time, the first direction is the width direction of the battery cell 50. Then, along the width direction of the battery cell 50, the heat exchange pipes 30 are spaced apart and arranged in at least two. For example, the heat exchange pipes 30 are arranged in two, three, four, or more numbers, and the number of heat exchange pipes 30 can be reasonably selected based on the number of battery cells 50 and the heat exchange requirements.

[0038] To ensure the same heat exchange effect for each battery cell 50, the number of heat exchange tubes 30 corresponding to each battery cell 50 is the same, the installation positions of the heat exchange tubes 30 are the same, the pipe diameters of the heat exchange tubes 30 are the same, and the materials of the heat exchange tubes 30 are the same. For example, each battery cell 50 corresponds to one heat exchange tube 30 for heat dissipation, and this one heat exchange tube 30 is located in the middle of the battery cell 50 in the thickness direction or the width direction. For example, each battery cell 50 corresponds to two heat exchange tubes 30 for heat dissipation, and these two heat exchange tubes 30 are located at two points of the trisection points in the thickness direction of the battery cell 50 or at two points of the trisection points in the width direction of the battery cell 50. For example, each battery cell 50 corresponds to two heat exchange tubes 30 for heat dissipation, and the two heat exchange tubes 30 are respectively located at positions close to the side edges of the battery cell 50.

[0039] In some embodiments, along the height direction of the battery cell 50, the second liquid guide tube 20 is configured to be disposed above the battery cell 50.

[0040] Based on disposing the second liquid guide tube 20 above the battery cell 50, the heat exchange liquid in the second liquid guide tube 20 also forms a heat exchange with the battery cell 50. At this time, only the heat exchange between the heat exchange tube 30 and the battery cell 50 is used to adjust the temperature of the battery cell 50. Since the liquid levels of the heat exchange liquid in each heat exchange tube 30 rise synchronously, in the height direction of the battery cell 50, the heat exchange temperatures of each battery cell 50 can be basically the same, so that the heat exchange temperatures of each battery cell 50 can be basically kept consistent, thereby improving the technical problem of large temperature difference between battery cells 50.

[0041] It can be understood that if the second liquid guide tube 20 also fits against the side of the battery cell 50, the second liquid guide tube 20 will also form a heat exchange with the battery cell 50. Although the temperature of the heat exchange liquid flowing from the heat exchange tube 30 into the second liquid guide tube 20 is the same, as the heat exchange liquid flows in the second liquid guide tube 20 and continuously exchanges heat with the battery cell 50, the temperature of the heat exchange liquid will inevitably change. At this time, there will be a slight difference in the temperatures between each battery cell 50, which will affect the consistency of the temperature of the battery cell 50 to a certain extent. In the embodiment of the present application, the second liquid guide tube 20 is disposed above the battery cell 50, which can prevent the second liquid guide tube 20 from exchanging heat with the battery cell 50, thereby avoiding the above problems.

[0042] As Figure 1 shown, in some embodiments, the liquid inlet 110 is formed at one end of the first liquid guide tube 10, and the liquid outlet 210 is formed at one end of the second liquid guide tube 20 away from the liquid inlet 110.

[0043] Based on making the liquid inlet 110 and the liquid outlet 210 far away from each other, the heat exchange liquid can be completely filled in the heat exchange assembly before being discharged, avoiding the formation of a region without heat exchange liquid in the heat exchange assembly and affecting heat exchange.

[0044] For example, both the first liquid guide pipe 10 and the second liquid guide pipe 20 are distributed along the width direction of the battery cell 50, and both the first liquid guide pipe 10 and the second liquid guide pipe 20 have a first end and a second end. Then, the liquid inlet 110 can be arranged at the first end of the first liquid guide pipe 10, and the liquid outlet 210 can be arranged at the second end of the second liquid guide pipe 20.

[0045] In some embodiments, the heat exchange pipe 30 includes at least one of a serpentine heat exchange pipe, an arc-shaped heat exchange pipe, and a straight heat exchange pipe.

[0046] As Figure 4 shown, the heat exchange pipe 30 can be arranged as a serpentine heat exchange pipe, which includes a plurality of continuously distributed S-shaped pipes. At this time, the contact area between the heat exchange pipe 30 and the battery cell 50 can be increased, thereby improving the heat exchange effect. Among them, since the liquid levels in each heat exchange pipe 30 rise synchronously, the temperatures of the respective serpentine heat exchange pipes at the same height position of the battery cell 50 are also basically the same, and for each battery cell 50, the heat exchange positions of the respective serpentine heat exchange pipes are also the same. Thus, the temperature consistency of the battery cell 50 can also be ensured, and temperature differences between the battery cells 50 can be prevented.

[0047] As Figure 3 shown, the heat exchange pipe 30 can be arranged as an arc-shaped heat exchange pipe. At this time, the contact area between the heat exchange pipe 30 and the battery cell 50 can be increased, thereby improving the heat exchange effect. Among them, since the liquid levels in each heat exchange pipe 30 rise synchronously, the temperatures of the respective arc-shaped heat exchange pipes at the same height position of the battery cell 50 are also basically the same, and for each battery cell 50, the heat exchange positions of the respective arc-shaped heat exchange pipes are also the same. Thus, the temperature consistency of the battery cell 50 can also be ensured, and temperature differences between the battery cells 50 can be prevented.

[0048] As Figure 1 shown, the heat exchange pipe 30 can be arranged as a straight heat exchange pipe. At this time, it is convenient for the forming of the heat exchange pipe 30 and the assembly of the heat exchange pipe 30 with the first liquid guide pipe 10 and the second liquid guide pipe 20.

[0049] In some embodiments, the first liquid guide pipe 10 can be arranged in parallel with the second liquid guide pipe 20. As Figure 1 shown, the straight heat exchange pipe can be vertically connected between the first liquid guide pipe 10 and the second liquid guide pipe 20. As Figure 2 shown, the straight heat exchange pipe can also be obliquely connected between the first liquid guide pipe 10 and the second liquid guide pipe 20.

[0050] As Figure 1 shown, in some embodiments, the first liquid guide pipe 10 extends along a first direction.

[0051] It can be understood that the extending direction of the first liquid guide pipe 10 is the same as the spacing direction of the heat exchange pipes 30. For example, when the first direction is the thickness direction of the battery cell 50, the first liquid guide pipe 10 extends along the thickness direction of the battery cell 50. When the first direction is the width direction of the battery cell 50, the first liquid guide pipe 10 extends along the width direction of the battery cell 50.

[0052] In some embodiments, the second liquid guide pipe 20 also extends along the first direction.

[0053] It can be understood that the extending direction of the second liquid guide pipe 20 is the same as the spacing direction of the heat exchange pipes 30. For example, when the second direction is the thickness direction of the battery cell 50, the second liquid guide pipe 20 extends along the thickness direction of the battery cell 50. When the second direction is the width direction of the battery cell 50, the second liquid guide pipe 20 extends along the width direction of the battery cell 50.

[0054] As Figure 5 shown, in some embodiments, the first liquid guide pipe 10 extends along the second direction, and the second direction is arranged at an angle with the first direction to define a lower end and a higher end on the first liquid guide pipe 10. Among them, along the height direction of the battery cell 50, the higher end is configured to be arranged below the battery cell 50.

[0055] Based on the fact that the second direction is arranged at an angle with the first direction, there is a certain angle between the extending direction of the first liquid guide pipe 10 and the width direction or the thickness direction of the battery cell 50, so that the first liquid guide pipe 10 can be arranged obliquely along the height direction of the battery cell 50. Based on the obliquely arranged first liquid guide pipe 10, it can have a higher end and a lower end. The higher end of the first liquid guide pipe 10 is arranged below the battery cell 50 to ensure that all areas of the first liquid guide pipe 10 are located below the battery cell 50. Thus, it is possible to prevent the heat exchange liquid from forming heat exchange with the battery cell 50 when flowing in the first liquid guide pipe 10.

[0056] In some embodiments, the angle between the second direction and the first direction can be set to 3°, 5°, 8°, 10°, etc.

[0057] In some embodiments, the heat exchange assembly further includes a heat exchange plate 40. The first liquid guide pipe 10, the second liquid guide pipe 20 and the heat exchange pipes 30 are all built in the heat exchange plate 40.

[0058] The heat exchange plate 40 can be arranged on the side of the battery module, so that the heat exchange pipes 30 in the heat exchange plate 40 are in contact with the battery cell 50 to achieve heat exchange. Among them, the heat exchange plate 40 can be set as the side plate of the battery module. The heat exchange plate 40 can also be set as the side plate of the battery box.

[0059] Among them, the first liquid guide pipe 10, the second liquid guide pipe 20 and the heat exchange pipe 30 built in the heat exchange plate 40 can form a first liquid guide channel, a second liquid guide channel and a heat exchange channel in the heat exchange plate 40.

[0060] When the heat exchange component is used to cool the battery cell 50, the heat exchange plate 40 serves as a liquid cooling plate. When the heat exchange component is used to heat the battery cell 50, the heat exchange plate 40 serves as a liquid heating plate.

[0061] In some embodiments, the first liquid guide pipe 10, the second liquid guide pipe 20 and the heat exchange pipe 30 are all integrally formed in the heat exchange plate 40. Thus, the first liquid guide channel, the second liquid guide channel and the heat exchange channel can be integrally formed in the heat exchange plate 40, so as to form the first liquid guide pipe 10, the second liquid guide pipe 20 and the heat exchange pipe 30 respectively, which is convenient for the rapid production of the heat exchange plate 40, the first liquid guide pipe 10, the second liquid guide pipe 20 and the heat exchange pipe 30, and improves the production efficiency.

[0062] On the other hand, as Figure 6 shown, the embodiment of the present utility model also provides a battery module. The battery module includes a battery cell 50 and a heat exchange component as described in the foregoing embodiments. Among them, the heat exchange pipe 30 is attached to the side surface of the battery cell 50. Along the height direction of the battery cell 50, the first liquid guide pipe 10 is arranged below the battery cell 50, and the second liquid guide pipe 20 is arranged above the battery cell 50.

[0063] In some embodiments, by arranging the first liquid guide pipe 10 below the battery cell 50, after the heat exchange liquid flows into the first liquid guide pipe 10 from the liquid inlet 110, the heat exchange liquid will not form a heat exchange with the battery cell 50, so that the temperature of the heat exchange liquid in the first liquid guide pipe 10 is basically the same. Since the second liquid guide pipe 20 having a liquid outlet 210 is located above the first liquid guide pipe 10 having a liquid inlet 110, and the first liquid guide pipe 10 and the second liquid guide pipe 20 are connected through the heat exchange pipe 30 attached to the battery cell 50, the circulation of the heat exchange liquid can be realized by the way of lower water inlet and upper water outlet. During the flow of the heat exchange liquid, it can rise synchronously in each heat exchange pipe 30, and the liquid levels in each heat exchange pipe 30 can be kept the same during the rising process. Based on the fact that the temperature of the heat exchange liquid at each position in the first liquid guide pipe 10 is the same, and the liquid levels of the heat exchange liquid in each heat exchange pipe 30 rise synchronously, the temperatures of each battery cell 50 for heat exchange can be basically kept the same, thereby improving the technical problem of large temperature difference between battery cells 50.

[0064] Among them, based on the second liquid guide tube 20 being arranged above the battery cell 50, the heat exchange liquid in the second liquid guide tube 20 also forms heat exchange with the battery cell 50. At this time, only the heat exchange tube 30 is used to perform heat exchange with the battery cell 50 to adjust the temperature of the battery cell 50. Since the liquid level of the heat exchange liquid in each heat exchange tube 30 rises synchronously, in the height direction of the battery cell 50, the heat exchange temperatures of each battery cell 50 can be basically the same, so that the heat exchange temperatures of each battery cell 50 can be basically kept consistent, thereby improving the technical problem of large temperature difference between battery cells 50.

[0065] It can be understood that if the second liquid guide tube 20 also fits against the side surface of the battery cell 50, the second liquid guide tube 20 will also form heat exchange with the battery cell 50. Although the temperature of the heat exchange liquid flowing from the heat exchange tube 30 into the second liquid guide tube 20 is the same, as the heat exchange liquid flows in the second liquid guide tube 20 and continuously exchanges heat with the battery cell 50, the temperature of the heat exchange liquid will inevitably change. At this time, there will be a slight difference in the temperature between each battery cell 50, which will affect the consistency of the temperature of the battery cell 50 to a certain extent. In the embodiment of the present application, the second liquid guide tube 20 is arranged above the battery cell 50, so that the second liquid guide tube 20 can be prevented from exchanging heat with the battery cell 50, thereby avoiding the above problems.

[0066] In some embodiments, the battery cell 50 is provided with at least two, and each heat exchange tube 30 is respectively arranged on the side surface of a battery cell 50.

[0067] At this time, each heat exchange tube 30 respectively performs liquid cooling or liquid heating on a battery cell 50. Among them, the heat exchange positions of each heat exchange tube 30 and each battery cell 50 are the same, so as to ensure that when the liquid level of the heat exchange liquid in the heat exchange tube 30 rises synchronously, the cooling or heating temperature of the battery cell 50 is the same. Thus, the consistency of the temperature between each battery cell 50 is ensured.

[0068] In some embodiments, the battery cell 50 is provided with at least three, and each heat exchange tube 30 is respectively arranged at the connection of every two adjacent battery cells 50.

[0069] At this time, each heat exchange tube 30 can perform liquid cooling or liquid heating on two battery cells 50, and each battery cell 50 can also realize liquid cooling or liquid heating through two heat exchange tubes 30. For the two battery cells 50 located on the opposite sides of the battery module, a heat exchange tube 30 can also be arranged at the connection of the battery cell 50 and the end plate. Thus, the cooling or heating temperature of each battery cell 50 is the same, ensuring the consistency of the temperature between each battery cell 50.

[0070] On the other hand, as Figure 6 shown, the embodiment of the present invention also provides a battery pack. The battery pack includes the battery module as described in the foregoing embodiment.

[0071] In some embodiments, by disposing the first liquid guide pipe 10 below the battery cell 50, after the heat exchange liquid flows into the first liquid guide pipe 10 from the liquid inlet 110, the heat exchange liquid will not form a heat exchange with the battery cell 50, so that the temperature of the heat exchange liquid in the first liquid guide pipe 10 is basically the same. Since the second liquid guide pipe 20 having the liquid outlet 210 is located above the first liquid guide pipe 10 having the liquid inlet 110, and the first liquid guide pipe 10 and the second liquid guide pipe 20 are connected through the heat exchange pipe 30 attached to the battery cell 50, the circulation of the heat exchange liquid can be realized by the way of lower water inlet and upper water outlet. During the flow of the heat exchange liquid, it can rise synchronously in each heat exchange pipe 30, and the liquid levels in each heat exchange pipe 30 can be kept the same during the rising process. Based on the fact that the temperature of the heat exchange liquid at each position in the first liquid guide pipe 10 is the same, and the liquid levels of the heat exchange liquid in each heat exchange pipe 30 rise synchronously, the temperature of each battery cell 50 during heat exchange can be basically kept the same, thus improving the technical problem of large temperature difference between battery cells 50.

[0072] For example, the battery pack includes a battery box. The battery box has a side plate and a bottom plate. The side plate can serve as the heat exchange plate 40, and the first liquid guide pipe 10, the second liquid guide pipe 20 and at least two heat exchange pipes 30 in the foregoing embodiments are formed in the side plate. The bottom plate is connected to the side plate, and the height of the connection between the bottom plate and the side plate is higher than the height of the first liquid guide pipe 10. Thus, it can be ensured that after the battery module is placed on the bottom plate, the height of the battery cell 50 is higher than that of the first liquid guide pipe 10. So that the heat exchange liquid in the first liquid guide pipe 10 does not have a heat exchange with the battery cell 50. The above embodiments of the present invention have been introduced in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A heat exchange component, used for heat exchange with the side of a battery cell, characterized in that: The heat exchange component comprises: A first liquid guide tube is formed with a liquid inlet; A second liquid guide tube is formed with a liquid outlet, and is spaced above the first liquid guide tube along the height direction of the battery core; a heat exchange tube, two ends of which are respectively connected to the first liquid guide tube and the second liquid guide tube, the heat exchange tube being configured to be attached to the side surface of the battery core, wherein the heat exchange tubes are arranged at intervals of at least two along the first direction; The first direction is perpendicular to the height direction of the battery core, and along the height direction of the battery core, the first liquid conduit is configured to be disposed below the battery core.

2. The heat exchange assembly according to claim 1, characterized in that: Along the height direction of the battery core, the second liquid conduit is configured to be disposed above the battery core.

3. The heat exchange assembly according to claim 1, characterized in that: The liquid inlet is formed at one end of the first liquid conduit, and the liquid outlet is formed at one end of the second liquid conduit away from the liquid inlet.

4. The heat exchange assembly according to any one of claims 1 to 3, characterized in that: The heat exchange tube includes at least one of a serpentine heat exchange tube, an arc-shaped heat exchange tube, and a straight heat exchange tube.

5. The heat exchange assembly according to any one of claims 1 to 3, characterized in that: The first liquid conduit extends along the first direction.

6. The heat exchange assembly according to any one of claims 1 to 3, characterized in that: The heat exchange component also includes: The heat exchange plate, the first liquid guide pipe, the second liquid guide pipe and the heat exchange pipe are all built in the heat exchange plate.

7. The heat exchange assembly according to claim 6, characterized in that: The first liquid guiding pipe, the second liquid guiding pipe and the heat exchange pipe are all integrally formed in the heat exchange plate.

8. A battery module, characterized in that: It comprises a battery cell and a heat exchange assembly as described in any one of claims 1 to 7, wherein the heat exchange tube is attached to the side of the battery cell, and along the height direction of the battery cell, the first liquid conduit is arranged below the battery cell, and the second liquid conduit is arranged above the battery cell.

9. The battery module according to claim 8, characterized in that: The battery cores are provided in at least two numbers, and each of the heat exchange tubes is respectively provided on the side of one of the battery cores.

10. The battery module according to claim 8, characterized in that: The number of the battery cells is at least three, and each of the heat exchange tubes is respectively arranged at the connection between each two adjacent battery cells.

11. A battery pack, characterized in that: Comprising a battery module as described in any one of claims 8 to 10.

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