Heat exchange assembly, battery module, and battery pack

Abstract

The present application provides a heat exchange assembly, a battery module, and a battery pack. The heat exchange assembly comprises a first liquid guide tube, a second liquid guide tube, and heat exchange tubes. A liquid inlet is formed at the first liquid guide tube. A liquid outlet is formed at the second liquid guide tube. In the height direction of a battery cell, the second liquid guide tube is arranged above the first liquid guide tube. Both ends of each heat exchange tube are respectively communicated with the first liquid guide tube and the second liquid guide tube. The heat exchange tubes are configured to be attached to a side surface of the battery cell. In a first direction, a plurality of heat exchange tubes are arranged at intervals. The first direction is perpendicular to the height direction of the battery cell, and in the height direction of the battery cell, the first liquid guide tube is configured to be arranged below the battery cell.

Description

Heat exchange assembly, battery module and battery pack

[0001] The present application claims priority to the Chinese patent application No. 202421524049.2 filed on June 28, 2024, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery, in particular to a heat exchange assembly, a battery module and a battery pack. BACKGROUND

[0003] In the related art, the battery pack usually uses a liquid cooling bottom plate to cool the battery cells. The heat dissipation channels in the liquid cooling bottom plate extend along the length direction, thereby sequentially cooling each battery cell. SUMMARY

[0004] However, as the cooling liquid continuously flows in the heat dissipation channels, the temperature of the cooling liquid will inevitably rise. This will result in better cooling effect for the battery cell located close to the liquid inlet and poor cooling effect for the battery cell located far away from the liquid inlet, causing large temperature difference between the battery cells, which affects the consistency, capacity and energy efficiency of the battery cells.

[0005] The present application provides a heat exchange assembly. The heat exchange assembly is configured to exchange heat with the side surface of a battery cell. The heat exchange assembly comprises a first liquid guide pipe, a second liquid guide pipe and a heat exchange pipe. The first liquid guide pipe is formed with a liquid inlet, the second liquid guide pipe is formed with a liquid outlet, and the second liquid guide pipe is spaced apart above the first liquid guide pipe along the height direction of the battery cell. The two ends of the heat exchange pipe are in communication with the first liquid guide pipe and the second liquid guide pipe, respectively. The heat exchange pipe is configured to be attached to the side surface of the battery cell. Along the first direction, the heat exchange pipe is spaced apart as a plurality of heat exchange pipes. The first direction is perpendicular to the height direction of the battery cell. Along the height direction of the battery cell, the first liquid guide pipe is configured to be arranged below the battery cell.

[0006] The present application also provides a battery module. The battery module comprises a battery cell and the above-mentioned heat exchange assembly. 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.

[0007] The present application also provides a battery pack. The battery pack comprises the above-mentioned battery module. ADVANTAGEOUS EFFECTS

[0008] The heat exchange assembly provided by the application can avoid heat exchange between the heat exchange liquid and the battery cell when the heat exchange liquid flows into the first liquid guide pipe from the liquid inlet, so that the temperature of the heat exchange liquid in the first liquid guide pipe is basically consistent. The second liquid guide pipe with the liquid outlet is arranged above the first liquid guide pipe with the liquid inlet, and the first liquid guide pipe and the second liquid guide pipe are communicated through the heat exchange pipes attached to the battery cell, so that the circulation of the heat exchange liquid can be realized by the way of water inlet at the bottom and water outlet at the top. During the circulation of the heat exchange liquid, the liquid level in each heat exchange pipe can be kept consistent during the synchronous rising in each heat exchange pipe. Based on the same temperature of the heat exchange liquid at different positions in the first liquid guide pipe and the synchronous rising of the liquid level in each heat exchange pipe, the temperature of each battery cell can be kept basically consistent, so that the technical problem of large temperature difference between the battery cells can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 is a structural schematic diagram of the heat exchange assembly provided by the embodiment of the application.

[0010] Fig. 2 is a structural schematic diagram of the heat exchange assembly provided by the embodiment of the application.

[0011] Fig. 3 is a structural schematic diagram of the heat exchange assembly provided by the embodiment of the application.

[0012] Fig. 4 is a structural schematic diagram of the heat exchange assembly provided by the embodiment of the application.

[0013] Fig. 5 is a structural schematic diagram of the heat exchange assembly provided by the embodiment of the application.

[0014] Fig. 6 is a structural schematic diagram of the battery pack provided by the embodiment of the application.

[0015] Explanation of reference signs:

[0016] 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. Embodiment of the application

[0017] As shown in FIGS. 1-6, the present application provides a heat exchange assembly. The heat exchange assembly is configured to exchange heat 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 an inlet 110. The second liquid guide pipe 20 is formed with an outlet 210. The second liquid guide pipe 20 is arranged above the first liquid guide pipe 10 along the height direction of the battery cell 50. The heat exchange pipe 30 is in communication with the first liquid guide pipe 10 and the second liquid guide pipe 20 at two ends thereof. The heat exchange pipe 30 is configured to be attached to the side surface of the battery cell 50. The heat exchange pipe 30 is arranged in multiple along a first direction. The first direction is perpendicular to the height direction of the battery cell 50. The first liquid guide pipe 10 is arranged below the battery cell 50 along the height direction of the battery cell 50.

[0018] 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 inlet 110, the heat exchange liquid can avoid exchanging heat with the battery cell 50, so that the temperature of the heat exchange liquid in the first liquid guide pipe 10 is basically uniform. Since the second liquid guide pipe 20 formed with the outlet 210 is arranged above the first liquid guide pipe 10 formed with the inlet 110, and the first liquid guide pipe 10 and the second liquid guide pipe 20 are communicated by 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 water inlet at the bottom and water outlet at the top. During the circulation of the heat exchange liquid, the liquid level in each heat exchange pipe 30 can rise synchronously. Based on the same temperature of the heat exchange liquid at each position in the first liquid guide pipe 10 and the synchronous rising of the liquid level in each heat exchange pipe 30, the temperature of each battery cell 50 can be basically kept uniform, thereby improving the technical problem of large temperature difference between the battery cells 50.

[0019] In some embodiments, the heat exchange assembly is configured to cool the side surface of the battery cell 50, thereby taking 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 cooling liquid. The cooling liquid flows into the first liquid guide pipe 10 from the inlet 110. Based on the installation position of the first liquid guide pipe 10 being lower than the battery cell 50, the cooling liquid can avoid exchanging heat with the battery cell 50. At this time, the temperature of the cooling liquid remains unchanged. As the cooling liquid flows from the first liquid guide pipe 10 to each heat exchange pipe 30, the cooling liquid can rise synchronously in each heat exchange pipe 30, so that the temperature of each heat exchange pipe 30 at the same height position of the battery cell 50 is basically the same. Thus, the cooling effect of the cooling liquid on each battery cell 50 is the same, and for each battery cell 50, the cooling temperature of each battery cell 50 can be basically kept uniform, thereby improving the technical problem of large temperature difference between the battery cells 50, and improving the consistency, capacity, and energy efficiency of the battery cells 50.

[0020] In some embodiments, the heat exchange assembly is configured to heat the side surface of the battery cell 50 to provide 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 a heating liquid. The heating liquid flows into the first liquid guide pipe 10 from the liquid inlet 110, and based on the installation position of the first liquid guide pipe 10 being lower than the battery cell 50, heat exchange between the heating liquid and the battery cell 50 can be avoided. 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 in each heat exchange pipe 30 synchronously rises, so that the temperature of each heat exchange pipe 30 at the same height position of the battery cell 50 is substantially the same. Thus, the heating effect of the heating liquid on each battery cell 50 is the same, and for each battery cell 50, the heating temperature of each battery cell 50 can be substantially consistent, thereby improving the technical problem of large temperature difference between battery cells 50 and improving the consistency, capacity and energy efficiency of the battery cell 50.

[0021] In some embodiments, the heat exchange pipe 30 is configured 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, and the second liquid guide pipe 20 can exchange heat with the battery cell 50 or not.

[0022] 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, and 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 arranged in multiple. 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 demand. The heat exchange pipe 30 can also be attached to the second side surface, and 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 arranged in multiple. 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 demand.

[0023] To ensure that the heat exchange effect of each battery cell 50 is the same, the number of heat exchange pipes 30 corresponding to each battery cell 50 is consistent, the installation position of the heat exchange pipe 30 is the same, the pipe diameter of the heat exchange pipe 30 is the same, and the material of the heat exchange pipe 30 is the same. For example, each battery cell 50 corresponds to one heat exchange pipe 30 for heat dissipation, and the one heat exchange pipe 30 is located at the middle of the thickness direction or the width direction of the battery cell 50. For example, each battery cell 50 corresponds to two heat exchange pipes 30 for heat dissipation, and the two heat exchange pipes 30 are located at two point positions of the three equal division points in the thickness direction of the battery cell 50 or at two point positions of the three equal division points in the width direction of the battery cell 50. For example, each battery cell 50 corresponds to two heat exchange pipes 30 for heat dissipation, and the two heat exchange pipes 30 are respectively located at positions close to the side surface edges of the battery cell 50.

[0024] In some embodiments, the second liquid guide pipe 20 is arranged above the battery cell 50 along the height direction of the battery cell 50.

[0025] Based on the arrangement of the second liquid guide pipe 20 above the battery cell 50, the heat exchange liquid in the second liquid guide pipe 20 also exchanges heat with the battery cell 50. At this time, the temperature regulation of the battery cell 50 is achieved only by the heat exchange between the heat exchange pipe 30 and the battery cell 50. Since the liquid level of the heat exchange liquid rises synchronously in each heat exchange pipe 30, the heat exchange temperature of each battery cell 50 can be basically the same in the height direction of the battery cell 50, so that the temperature of each battery cell 50 can be basically kept consistent, thereby improving the technical problem of large temperature difference between the battery cells 50.

[0026] It can be understood that if the second liquid guide pipe 20 also abuts the side surface of the battery cell 50, the second liquid guide pipe 20 will also exchange heat with the battery cell 50. Although the temperature of the heat exchange liquid flowing into the second liquid guide pipe 20 from the heat exchange pipe 30 is the same, as the heat exchange liquid flows in the second liquid guide pipe 20, the temperature of the heat exchange liquid will inevitably change as the heat exchange liquid continuously exchanges heat with the battery cell 50. At this time, there will be a slight difference in temperature between each battery cell 50, which will affect the consistency of the temperature of the battery cell 50 to some extent. In the embodiment of the present application, the second liquid guide pipe 20 is arranged above the battery cell 50, so that the second liquid guide pipe 20 can prevent heat exchange with the battery cell 50, thereby avoiding the problem of large temperature difference between the battery cells.

[0027] As shown in FIG. 1, in some embodiments, the liquid inlet 110 is formed at one end of the first liquid guide pipe 10, and the liquid outlet 210 is formed at the end of the second liquid guide pipe 20 away from the liquid inlet 110.

[0028] Based on the mutual distancing of the liquid inlet 110 and the liquid outlet 210, the heat exchange liquid can be completely filled in the heat exchange assembly before being discharged, thereby avoiding the formation of a region without heat exchange liquid in the heat exchange assembly and affecting heat exchange.

[0029] For example, the first liquid guide pipe 10 and the second liquid guide pipe 20 are both distributed along the width direction of the battery cell 50, and the first liquid guide pipe 10 and the second liquid guide pipe 20 both have a first end and a second end. 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.

[0030] 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.

[0031] As shown in FIG. 4, the heat exchange pipes 30 can be arranged as serpentine heat exchange pipes, which include a plurality of continuously distributed S-shaped pipes. At this time, the contact area between the heat exchange pipes 30 and the battery cells 50 can be increased, so as to improve the heat exchange effect. In this case, since the liquid level in each heat exchange pipe 30 rises synchronously, the temperature of each serpentine heat exchange pipe at the same height position of the battery cell 50 is also substantially the same, and for each battery cell 50, the heat exchange position of each serpentine heat exchange pipe is also the same. Thus, the temperature consistency of the battery cells 50 can also be ensured, and the temperature difference between the battery cells 50 can be prevented.

[0032] As shown in FIG. 3, the heat exchange pipes 30 can be arranged as arc-shaped heat exchange pipes. At this time, the contact area between the heat exchange pipes 30 and the battery cells 50 can be increased, so as to improve the heat exchange effect. In this case, since the liquid level in each heat exchange pipe 30 rises synchronously, the temperature of each arc-shaped heat exchange pipe at the same height position of the battery cell 50 is also substantially the same, and for each battery cell 50, the heat exchange position of each arc-shaped heat exchange pipe is also the same. Thus, the temperature consistency of the battery cells 50 can also be ensured, and the temperature difference between the battery cells 50 can be prevented.

[0033] As shown in FIG. 1, the heat exchange pipes 30 can be arranged as straight heat exchange pipes. At this time, the forming of the heat exchange pipes 30 and the assembly of the heat exchange pipes 30 with the first liquid guide pipe 10 and the second liquid guide pipe 20 can be facilitated.

[0034] In some embodiments, the first liquid guide pipe 10 can be arranged in parallel with the second liquid guide pipe 20. As shown in FIG. 1, the straight heat exchange pipes can be connected vertically between the first liquid guide pipe 10 and the second liquid guide pipe 20. As shown in FIG. 2, the straight heat exchange pipes can also be connected obliquely between the first liquid guide pipe 10 and the second liquid guide pipe 20.

[0035] As shown in FIG. 1, in some embodiments, the first liquid guide pipe 10 extends along a first direction.

[0036] It can be understood that the extension 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.

[0037] In some embodiments, the second liquid guide pipe 20 also extends along the first direction.

[0038] It can be understood that the extension 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.

[0039] As shown in FIG. 5, in some embodiments, the first liquid guide pipe 10 extends along a second direction, 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, wherein the higher end is configured to be arranged below the electric core 50 along the height direction of the electric core 50.

[0040] Based on the second direction being arranged at an angle with the first direction, the extension direction of the first liquid guide pipe 10 has a certain angle with the width direction of the electric core 50 or the thickness direction of the electric core 50, so that the first liquid guide pipe 10 can be arranged obliquely along the height direction of the electric core 50. Based on the obliquely arranged first liquid guide pipe 10, the first liquid guide pipe 10 can have a higher end and a lower end. The higher end of the first liquid guide pipe 10 is arranged below the electric core 50, so as to ensure that the entire area of the first liquid guide pipe 10 is below the electric core 50. In this way, heat exchange between the heat exchange liquid flowing in the first liquid guide pipe 10 and the electric core 50 can be prevented.

[0041] In some embodiments, the angle between the second direction and the first direction can be 3°, 5°, 8°, 10°, etc.

[0042] In some embodiments, the heat exchange assembly further comprises a heat exchange plate 40. The first liquid guide pipe 10, the second liquid guide pipe 20 and the heat exchange pipe 30 are all built-in in the heat exchange plate 40.

[0043] The heat exchange plate 40 can be arranged on the side of the battery module, so that the heat exchange pipe 30 in the heat exchange plate 40 is in contact with the electric core 50 to achieve heat exchange. The heat exchange plate 40 can be arranged as a side plate of the battery module. The heat exchange plate 40 can also be arranged as a side plate of the battery box.

[0044] The first liquid guide pipe 10, the second liquid guide pipe 20 and the heat exchange pipe 30 built-in 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.

[0045] When the heat exchange assembly is configured to cool the electric core 50, the heat exchange plate 40 acts as a liquid cooling plate. When the heat exchange assembly is configured to heat the electric core 50, the heat exchange plate 40 acts as a liquid heating plate.

[0046] In some embodiments, the first liquid guide pipe 10, the second liquid guide pipe 20 and the heat exchange pipe 30 are integrally formed in the heat exchange plate 40. In this way, the first liquid guide pipe 10, the second liquid guide pipe 20 and the heat exchange pipe 30 can be formed by integrally forming the first liquid guide channel, the second liquid guide channel and the heat exchange channel in the heat exchange plate 40, so as to facilitate 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 improve the production efficiency.

[0047] As shown in FIG. 6, the application also provides a battery module. The battery module comprises the battery cell 50 and the heat exchange assembly as in the foregoing embodiments. The heat exchange pipe 30 is attached to the side 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.

[0048] 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 can avoid 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 consistent. Since the second liquid guide pipe 20 with the liquid outlet 210 is arranged 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 communicated 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 water in from below and water out from above. During the circulation of the heat exchange liquid, the liquid level in each heat exchange pipe 30 can be kept consistent during the synchronous rising. Based on the same temperature of the heat exchange liquid at each position in the first liquid guide pipe 10 and the synchronous rising of the liquid level of the heat exchange liquid in each heat exchange pipe 30, the temperature of each battery cell 50 can be kept basically consistent, thereby improving the technical problem of large temperature difference between the battery cells 50.

[0049] 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 can avoid 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 consistent. Since the second liquid guide pipe 20 with the liquid outlet 210 is arranged 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 communicated 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 water in from below and water out from above. During the circulation of the heat exchange liquid, the liquid level in each heat exchange pipe 30 can be kept consistent during the synchronous rising. Based on the same temperature of the heat exchange liquid at each position in the first liquid guide pipe 10 and the synchronous rising of the liquid level of the heat exchange liquid in each heat exchange pipe 30, the temperature of each battery cell 50 can be kept basically consistent, thereby improving the technical problem of large temperature difference between the battery cells 50.

[0050] It can be understood that if the second liquid guide pipe 20 is also attached to the side of the battery cell 50, the second liquid guide pipe 20 will also exchange heat with the battery cell 50. Although the temperature of the heat exchange liquid flowing into the second liquid guide pipe 20 from the heat exchange pipe 30 is the same, as the heat exchange liquid flows in the second liquid guide pipe 20, the temperature of the heat exchange liquid will inevitably change as the heat exchange liquid continuously exchanges heat with the battery cell 50. At this time, the temperature of each battery cell 50 will have a slight difference, which will affect the consistency of the temperature of the battery cell 50 to some extent. In the application, the second liquid guide pipe 20 is arranged above the battery cell 50, so that the second liquid guide pipe 20 can avoid heat exchange with the battery cell 50, thereby avoiding the problem of large temperature difference between the battery cells.

[0051] In some embodiments, the plurality of battery cells 50 are arranged, and each heat exchange pipe 30 is arranged at a side of each battery cell 50.

[0052] At this time, each heat exchange pipe 30 performs liquid cooling or liquid heating on each battery cell 50. The heat exchange position of each heat exchange pipe 30 and each battery cell 50 is consistent, so that the cooling or heating temperature of each battery cell 50 is consistent when the liquid level of the heat exchange liquid in each heat exchange pipe 30 rises synchronously. Thus, the temperature consistency between the battery cells 50 is ensured.

[0053] In some embodiments, the plurality of battery cells 50 are arranged as at least three, and each heat exchange pipe 30 is arranged at a connection between each adjacent two battery cells 50.

[0054] At this time, each heat exchange pipe 30 can perform liquid cooling or liquid heating on two battery cells 50, and each battery cell 50 can also be liquid cooled or liquid heated by two heat exchange pipes 30. For two battery cells 50 at opposite sides of the battery module, a heat exchange pipe 30 can also be arranged at the connection between the battery cell 50 and the end plate. Thus, the cooling or heating temperature of each battery cell 50 is consistent, and the temperature consistency between the battery cells 50 is ensured.

[0055] As shown in FIG. 6, the application also provides a battery pack. The battery pack includes the battery module as in the foregoing embodiments.

[0056] 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 can avoid 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 consistent. Since the second liquid guide pipe 20 with the liquid outlet 210 is arranged above the first liquid guide pipe 10 with the liquid inlet 110, and the heat exchange pipe 30 attached to the battery cell 50 connects the first liquid guide pipe 10 and the second liquid guide pipe 20, the circulation of the heat exchange liquid can be realized by the way of water in from the bottom and water out from the top. During the circulation of the heat exchange liquid, the liquid level in each heat exchange pipe 30 can rise synchronously, and the liquid level in each heat exchange pipe 30 can remain consistent during the rising process. Based on the same temperature of the heat exchange liquid at each position in the first liquid guide pipe 10, and the synchronous rising of the liquid level of the heat exchange liquid in each heat exchange pipe 30, the temperature of each battery cell 50 for heat exchange can basically remain consistent, thereby improving the technical problem of large temperature difference between the battery cells 50.

[0057] For example, the battery pack comprises a battery box. The battery box has a side plate and a bottom plate. The side plate can be the heat exchange plate 40, and the first liquid guide pipe 10, the second liquid guide pipe 20 and the plurality of heat exchange pipes 30 in the foregoing embodiments are formed in the side plate. The bottom plate is connected with 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 the battery module is placed behind the bottom plate, and the height of the battery cell 50 is higher than the first liquid guide pipe 10. The heat exchange liquid in the first liquid guide pipe 10 does not exchange heat with the battery cell 50.

Claims

1. A heat exchange assembly configured to exchange heat with the side of a battery cell, the heat exchange assembly comprising: The first liquid guide tube has a liquid inlet; The second liquid guide tube has a liquid outlet and is spaced above the first liquid guide tube along the height direction of the battery cell. A heat exchange tube, the two ends of which are respectively connected to the first liquid guide tube and the second liquid guide tube, the heat exchange tube is configured to fit against the side of the battery cell, wherein, along the first direction, the heat exchange tube is spaced in multiples; 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 tube is configured to be disposed below the battery cell.

2. The heat exchange assembly according to claim 1, wherein, Along the height direction of the battery cell, the second liquid guide tube is configured to be disposed above the battery cell.

3. The heat exchange assembly according to claim 1 or 2, wherein, The liquid inlet is formed at one end of the first liquid guide tube, and the liquid outlet is formed at the end of the second liquid guide tube away from the liquid inlet.

4. The heat exchange assembly according to any one of claims 1-3, wherein, The heat exchange tube includes at least one of serpentine heat exchange tube, arc heat exchange tube, and straight heat exchange tube.

5. The heat exchange assembly according to any one of claims 1-4, wherein, The first liquid guide tube extends along the first direction.

6. The heat exchange assembly according to any one of claims 1-5, wherein, The heat exchange assembly also includes: The heat exchange plate is provided, and the first liquid guide tube, the second liquid guide tube, and the heat exchange tube are all built into the heat exchange plate.

7. The heat exchange assembly according to claim 6, wherein, The first liquid guide tube, the second liquid guide tube, and the heat exchange tube are all integrally formed within the heat exchange plate.

8. A battery module, comprising a battery cell and a heat exchange assembly as described in any one of claims 1-7, wherein, The heat exchange tube is attached to the side of the battery cell. Along the height direction of the battery cell, the first liquid guide tube is located below the battery cell, and the second liquid guide tube is located above the battery cell.

9. The battery module according to claim 8, wherein, The battery cells are configured in multiple ways, and each heat exchange tube is respectively disposed on the side of one of the battery cells.

10. The battery module according to claim 8 or 9, wherein, The battery cells are configured with at least three, and each heat exchange tube is respectively located at the connection point of each two adjacent battery cells.

11. A battery pack, characterized in that, Includes the battery module as described in any one of claims 8-10.

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