Cooling assembly, battery pack and vehicle

Abstract

Disclosed in the present invention is a vehicle provided with a battery pack. The battery pack is provided with a cooling assembly. The cooling assembly comprises first flow channel structures and second flow channel structures, liquid outlets of the first flow channel structures being used for communicating with liquid inlets of the second flow channel structures, the first flow channel structures being used for dissipating heat of non-pole areas of the battery pack, and the second flow channel structures being used for dissipating heat of pole areas of the battery pack.

Description

Cooling components, battery packs, and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202322664360.9, filed on September 28, 2023, entitled “Cooling Assembly, Battery Pack and Vehicle,” the entire contents of which are incorporated herein for all purposes. Technical Field

[0003] The present application relates to the field of batteries, and more particularly to a cooling assembly, a battery pack, and a vehicle. Background Art

[0004] Battery packs often have a high density of cells. During the charge and discharge process, a significant amount of heat is generated and accumulated within the pack. Excessive heat accumulation not only reduces the efficiency of charging and discharging the cells, but also increases the risk of explosion. Therefore, dissipating heat from the battery pack is a key issue. Related technologies have shown poor heat dissipation in the non-pole portion of the cells.

[0005] Summary of the Invention

[0006] The present invention is proposed to address at least one of the aforementioned problems. According to a first aspect of the present application, a cooling assembly is provided, comprising: a first flow channel structure and a second flow channel structure; wherein the liquid outlet of the first flow channel structure is configured to communicate with the liquid inlet of the second flow channel structure; and wherein the first flow channel structure is configured to dissipate heat from a non-pole region of a battery pack, and the second flow channel structure is configured to dissipate heat from a pole region of the battery pack.

[0007] In one embodiment of the present application, the battery pack includes a plurality of battery cells, and an extension direction of the flow channel of at least one of the first flow channel structure and the second flow channel structure is the same as an arrangement direction of the battery cells in the battery pack.

[0008] In one embodiment of the present application, the battery pack includes a plurality of battery cells, and the arrangement directions of the first flow channel structure and the second flow channel structure are both the same as the length direction of the battery cells in the battery pack.

[0009] In one embodiment of the present application, the first flow channel structure and the second flow channel structure are arranged at intervals; the cooling assembly further includes: a heat conducting plate, which is connected between two adjacent flow channel structures in one or more of the first flow channel structures and one or more of the second flow channel structures.

[0010] In one embodiment of the present application, a support block is provided on the heat conducting plate, and the support block is used to support the battery pack.

[0011] In one embodiment of the present application, the first flow channel structure is a first harmonica tube, and the second flow channel structure is a second harmonica tube.

[0012] In one embodiment of the present application, the cooling assembly includes at least two unit areas, each of the unit areas is used to correspond to a battery pack and perform heat exchange on the battery pack, and the unit area includes the first flow channel structure and the second flow channel structure; at least two of the unit areas are arranged along the length direction of the battery cell.

[0013] In one embodiment of the present application, two adjacent unit areas are separated by a first heat insulation board.

[0014] In one embodiment of the present application, a connecting portion is provided on the first heat insulation plate, and the connecting portion is used to connect to a baffle, and the baffle is used to separate two adjacent battery packs.

[0015] In one embodiment of the present application, each of the unit areas includes a first flow channel structure and two second flow channel structures, and the first flow channel structure is located between the two second flow channel structures.

[0016] In one embodiment of the present application, each of the unit areas includes two first flow channel structures and two second flow channel structures, and the two first flow channel structures are located between the two second flow channel structures.

[0017] In one embodiment of the present application, the cooling assembly further includes: a liquid inlet manifold, a liquid outlet manifold and a connecting manifold; wherein, the liquid inlet manifold is connected to the liquid inlet of the first flow channel structure; the liquid outlet manifold is connected to the liquid outlet of the second flow channel structure; and the connecting manifold is connected between the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure.

[0018] In one embodiment of the present application, the cooling assembly includes at least two unit areas, each of the unit areas is used to correspond to a battery pack and perform heat exchange on the battery pack, and the unit area includes the first flow channel structure and the second flow channel structure; the liquid inlet manifold includes at least two first liquid inlet manifolds, each of the first liquid inlet manifolds corresponds to a unit area and is connected to the liquid inlet of the first flow channel structure in the unit area.

[0019] In one embodiment of the present application, the liquid inlet manifold further includes a second liquid inlet manifold, and the second liquid inlet manifold is connected to all of the first liquid inlet manifolds.

[0020] In one embodiment of the present application, the connecting collecting pipe includes at least two connecting collecting sections, and different connecting collecting sections are not connected to each other; each unit area corresponds to one connecting collecting section, and the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure in each unit area are connected to the corresponding connecting collecting section.

[0021] In one embodiment of the present application, the cooling assembly further includes: a refrigerant connector for being arranged on the battery case, the refrigerant connector being provided with a liquid inlet interface and a liquid outlet interface; wherein the input port on the liquid inlet manifold is connected to the liquid inlet interface via a liquid inlet flexible tube; and the output port on the liquid outlet manifold is connected to the liquid outlet interface via a liquid outlet flexible tube.

[0022] In one embodiment of the present application, the cooling assembly further includes: a heat conducting plate, which is connected between two adjacent flow channel structures of one or more first flow channel structures and one or more second flow channel structures; both ends of the heat conducting plate are respectively connected to the liquid outlet manifold, the liquid inlet manifold or the connecting manifold through connecting blocks, and the connecting blocks are also used to support the battery pack.

[0023] In one embodiment of the present application, a limiting end surface is provided on the connection block on a side facing the battery pack, and the limiting end surface is used to abut against a side surface of the battery pack along the arrangement direction of the battery cells.

[0024] In one embodiment of the present application, the cooling assembly further includes: two second heat insulation plates, respectively arranged on both sides of the cooling assembly along the length direction of the battery cells in the battery pack.

[0025] According to the second aspect of the present application, a battery pack is also provided, comprising: a battery pack and any one of the above-mentioned cooling components.

[0026] In one embodiment of the present application, the battery pack includes a pole region and a non-pole region, the pole region and the non-pole region are arranged along the length direction of the battery cell in the battery pack, and the pole region is arranged at at least one end of the battery pack; and the pole region occupies 2% to 25% of the length of the battery cell in the battery pack, and the non-pole region occupies 50% to 96% of the length of the battery cell.

[0027] In one embodiment of the present application, the battery pack has at least two layers, each layer includes at least one battery pack, and the first flow channel structure and the second flow channel structure are located between two adjacent layers of the battery pack.

[0028] In one embodiment of the present application, the stacking direction of at least two layers of the battery pack, the arrangement direction of the battery cells in the battery pack, and the length direction of the battery cells are perpendicular to each other.

[0029] In one embodiment of the present application, the battery pack includes at least two battery packs arranged along the length direction of the battery cells.

[0030] According to a third aspect of the present application, a vehicle is further provided, comprising: a vehicle body, and any one of the above-mentioned battery packs arranged on the vehicle body.

[0031] According to the cooling assembly, battery pack, and vehicle provided in the embodiments of the present application, the liquid outlet of the first flow channel structure is connected to the liquid inlet of the first flow channel structure. The first flow channel structure is used to dissipate heat from the non-pole area of ​​the battery pack, and the second flow channel structure is used to dissipate heat from the pole area of ​​the battery pack. As a result, the refrigerant first flows into the first flow channel structure to cool the low-temperature areas of the non-pole area of ​​the battery pack. The refrigerant then flows into the second flow channel structure to cool the high-temperature areas of the pole area of ​​the battery pack. This refrigerant flow pattern of cooling the low-temperature areas first and then the high-temperature areas improves the heat dissipation effect on the non-pole areas of the battery cells in the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] FIG1 is a schematic diagram of the three-dimensional structure of a cooling assembly provided by one embodiment of the present invention;

[0034] FIG2 is a schematic diagram of the top view of the cooling assembly shown in FIG1 ;

[0035] FIG3 is a front view schematic diagram of the cooling assembly shown in FIG1 ;

[0036] FIG4 is a schematic diagram of an exploded structure of a battery pack and a cooling assembly according to an embodiment of the present invention;

[0037] FIG5 is a schematic top view of the structure of a battery pack assembled on a cooling assembly according to an embodiment of the present invention.

[0038] Figure numerals: 11 - first liquid inlet manifold 12 - second liquid inlet manifold 13 - connecting manifold 14 - liquid outlet manifold 15 - refrigerant joint 16 - liquid inlet interface 17 - liquid outlet interface 18 - liquid inlet flexible pipe 19 - liquid outlet flexible pipe 21 - first flow channel structure 22 - second flow channel structure 23 - heat conducting plate 24 - first heat insulating plate 25 - second heat insulating plate 26 - connecting portion 27 - supporting block 28 - connecting block 29 - limiting end surface 31 - first heat dissipation area 32 - second heat dissipation area 40 - battery pack 41 - bottom plate DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described in the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0040] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, certain technical features well known in the art are not described to avoid confusion with the present invention.

[0041] It should be understood that the present invention can be implemented in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to make disclosure thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0042] In order to fully understand the present invention, a detailed structure will be provided in the following description to illustrate the technical solution proposed by the present invention. Optional embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other implementations.

[0043] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0044] The present application provides a cooling component. Referring to Figures 1, 2 and 4, the cooling component includes: a first flow channel structure 21 and a second flow channel structure 22; wherein the liquid outlet of the first flow channel structure 21 is used to communicate with the liquid inlet of the second flow channel structure 22; and the first flow channel structure 21 is used to dissipate heat to the non-pole area of ​​the battery pack 40, and the second flow channel structure 22 is used to dissipate heat to the pole area of ​​the battery pack 40.

[0045] In the above scheme, the liquid outlet of the first flow channel structure 21 is used to communicate with the liquid inlet of the first flow channel structure 21, so that the first flow channel structure 21 is used to dissipate heat from the non-polar column area of ​​the battery pack 40, and the second flow channel structure 22 is used to dissipate heat from the polar column area of ​​the battery pack 40. As a result, the refrigerant first flows into the first flow channel structure 21 to cool the low-temperature area of ​​the non-polar column area of ​​the battery pack 40, and then flows into the second flow channel structure 22 to cool the high-temperature area of ​​the polar column area of ​​the battery pack 40. The refrigerant flow method of first cooling the low-temperature area and then cooling the high-temperature area improves the heat dissipation effect on the non-polar column part of the battery cell in the battery pack, reduces the temperature of the non-polar column part of the battery cell, and avoids the problem of expansion of the non-polar column part of the battery cell due to excessive temperature. The above-mentioned structures are described in detail below with reference to the accompanying drawings.

[0046] When setting the first flow channel structure 21 and the second flow channel structure 22, any flow channel structure that can circulate refrigerant can be used. That is, as long as the flow channel structure has the function of circulating refrigerant, it is within the scope of protection of the embodiments of the present application. For example, each of the first flow channel structure 21 and the second flow channel structure 22 can be a harmonica tube containing multiple flow channels arranged side by side, that is, the first flow channel structure 21 is a first harmonica tube, and the second flow channel structure 22 is a second harmonica tube. In the cold plate using harmonica tubes in the related art, the heat dissipation effect on the non-pole area of ​​the battery pack 40 is poor. However, in some embodiments of the present application, harmonica tubes are used as the first flow channel structure 21 and the second flow channel structure 22, which can allow the refrigerant to first flow from the first harmonica tube to dissipate heat to the non-pole area of ​​the battery pack 40, and then flow into the second harmonica tube to dissipate heat to the pole area of ​​the battery pack 40. The non-pole area with lower temperature is first dissipated, and then the pole area with higher temperature is dissipated, which can improve the heat dissipation effect of the battery pack 40. Furthermore, a harmonica tube is used as the flow channel structure, which facilitates the simplification of the flow channel structure.

[0047] Referring to Figure 2, each flow channel of the first flow channel structure 21 and the second flow channel structure 22 has an inlet and an outlet, wherein the inlet is used to flow refrigerant into the flow channel structure, and the outlet is used to discharge the refrigerant in the flow channel structure. The outlet of the first flow channel structure 21 is used to communicate with the inlet of the second flow channel structure 22. Specifically, the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure can be connected in a variety of ways. For example, the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure can be directly connected. In some embodiments, the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure can be connected through a pipeline. In some embodiments, the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure can be connected through a pipeline and a valve. The valve can be opened under certain conditions to connect the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure. The valve can be closed under other conditions to disconnect the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure.

[0048] By connecting the liquid outlet of the first flow channel structure 21 with the liquid inlet of the second flow channel structure 22, the refrigerant first flows into the first flow channel structure 21, then flows out of the first flow channel structure 21 and into the second flow channel structure 22. The first flow channel structure 21 is used to dissipate heat from the non-pole area of ​​the battery pack 40, while the second flow channel structure 22 is used to dissipate heat from the pole area of ​​the battery pack 40. Consequently, the refrigerant first flows into the first flow channel structure 21 to cool the low-temperature areas of the non-pole area of ​​the battery pack 40. The refrigerant then flows into the second flow channel structure 22 to cool the high-temperature areas of the pole area of ​​the battery pack 40. This refrigerant flow pattern of cooling the low-temperature areas first and then the high-temperature areas improves the heat dissipation effect on the non-pole areas of the battery cells in the battery pack.

[0049] When determining the pole area and non-pole area of ​​the battery pack 40, the pole area of ​​the battery pack 40 can occupy 2% to 25% of the cell length, and the non-pole area of ​​the battery pack 40 can occupy 50% to 96% of the cell length. Specifically, the pole area of ​​the battery pack 40 can occupy any value between 2% and 25%, such as 2%, 5%, 8%, 10%, 13%, 15%, 18%, 20%, 25%, etc., of the cell length. The non-pole area of ​​the battery pack 40 can occupy any value between 50% and 96%, such as 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 60%, 96%, etc., of the cell length. For example, if the pole area can occupy 10% of the cell length, and the cell has two pole areas, located at either end of the cell's extension direction, then the non-pole area accounts for 80% of the cell length.

[0050] It should be explained that the pole area of ​​the battery pack 40 refers to the end position of the poles of all the battery cells in the battery pack 40. The pole area of ​​the battery pack 40 does not only refer to the pole surface of the battery pack 40, but also includes a preset length extending from the pole surface of the battery pack 40 to the inside of the battery pack 40. The size of the preset length is specifically related to the length of the pole in the battery pack 40. That is, the pole in the battery cell does not only refer to the part exposed outside the battery pack 40, but also includes the part of the battery cell that is electrically connected to the positive electrode or negative electrode in the battery cell. During the discharge or charging process of the battery pack 40, the pole area of ​​the battery pack 40 generates heat faster, so the temperature of the pole area of ​​the battery pack 40 is often higher than the non-pole area of ​​the battery pack 40 (other parts outside the pole area). In the embodiment of the present application, the refrigerant flowing from the liquid inlet manifold into the first flow channel structure 21 first cools the low-temperature area of ​​the non-polar column area of ​​the battery cell, and then flows into the second flow channel structure 22 through the connecting manifold 13, and then cools the high-temperature area of ​​the polar column area of ​​the battery pack 40. The refrigerant flow method of first cooling the low-temperature area and then cooling the high-temperature area is adopted to improve the heat dissipation effect of the non-polar column part of the battery cell in the battery pack, reduce the temperature of the non-polar column part of the battery cell, and avoid the problem of expansion of the non-polar column part of the battery cell due to excessive temperature.

[0051] When arranging the first flow channel structure 21 and the second flow channel structure 22, a variety of arrangements can be adopted, mainly related to the position of the pole area and the non-pole area of ​​the battery pack 40, and can also be related to the arrangement direction of multiple battery cells in the battery pack. For example, referring to Figures 4 and 5, the battery pack contains multiple battery cells, and the extension direction of the flow channel of at least one of the first flow channel structure 21 and the second flow channel structure 22 is the same as the arrangement direction of the battery cells in the battery pack 40. Specifically, the extension direction of the flow channel of the first flow channel structure 21 can be the same as the arrangement direction of the battery cells in the battery pack 40, while the extension direction of the second flow channel structure 22 is different from the arrangement direction of the battery cells in the battery pack 40, for example, there can be a non-zero angle between the two. The extension direction of the flow channel of the second flow channel structure 22 can be the same as the arrangement direction of the battery cells in the battery pack 40, while the extension direction of the first flow channel structure 21 is different from the arrangement direction of the battery cells in the battery pack 40, for example, there can be a non-zero angle between the two. The extension direction of the flow channels of the first flow channel structure 21 and the second flow channel structure 22 may be the same as the arrangement direction of the battery cells in the battery pack 40 .

[0052] For example, the battery cells in the battery pack 40 can be arranged sequentially along the extension direction of the flow channel, so that the first flow channel structure 21 is arranged opposite the non-polar column area of ​​each battery cell, and the second flow channel structure 22 is arranged opposite the polar column area of ​​each battery cell. This facilitates the first flow channel structure 21 to dissipate heat from the non-polar column area of ​​each battery cell in the battery pack 40, and facilitates the second flow channel structure 22 to dissipate heat from the polar column area of ​​each battery cell in the battery pack 40. For ease of description below, the extension direction of the flow channel is defined as the first direction.

[0053] It should be understood that the arrangement of the battery cells in the battery pack 40 may be in other ways besides the way shown above. Referring to Figures 4 and 5, in some embodiments, when the battery pack includes multiple battery cells, the arrangement direction of the first flow channel structure 21 and the second flow channel structure 22 may be the same as the length direction of the battery cells in the battery pack 40. That is, the first flow channel structure 21 and the second flow channel structure 22 are arranged along the length direction of the battery cells, so that the first flow channel structure 21 can be opposite to the position of all the battery cells in the battery pack 40, and the second flow channel structure 22 can be opposite to the position of all the battery cells in the battery pack 40, so that the first flow channel structure 21 can dissipate heat to the non-polar column area of ​​each battery cell in the battery pack 40, and the second flow channel structure 22 can dissipate heat to the polar column area of ​​each battery cell in the battery pack 40. For the convenience of description below, the length direction of the battery cell is defined as the second direction, and the second direction is perpendicular to the first direction.

[0054] For example, referring to Figures 1, 2, and 3, the first flow channel structure 21 and the second flow channel structure 22 can be arranged sequentially along the second direction, with each flow channel structure disposed between a first side and a second side of the cooling assembly, wherein the first side and the second side are two opposing sides of the cooling assembly along the first direction. For example, the first flow channel structure 21 and the second flow channel structure 22 can both extend along the first direction, with the multiple flow channel structures arranged along the second direction, wherein the first direction and the second direction are perpendicular to each other.

[0055] Exemplarily, referring to Figures 1 and 2, the first flow channel structure 21 and the second flow channel structure 22 can be arranged at intervals. The number of the first flow channel structure 21 and the second flow channel structure 22 can be at least one, and the first flow channel structure 21 and the second flow channel structure 22 can be arranged at intervals. That is, the first flow channel structure 21 and the second flow channel structure 22 are arranged at intervals along the length direction of the battery cell. Specifically, the two first flow channel structures 21 can be arranged adjacent to each other and at intervals, or the two second flow channel structures 22 can be arranged adjacent to each other and at intervals, or the first flow channel structure 21 and the second flow channel structure 22 can be arranged adjacent to each other and at intervals, which is specifically related to the position of the pole area and the non-pole area of ​​the battery cell in the battery pack 40.

[0056] At this time, the cooling assembly may further include: a heat conducting plate 23, the heat conducting plate 23 being connected between two adjacent flow channel structures in one or more first flow channel structures 21 and one or more second flow channel structures 22. Specifically, the heat conducting plate 23 may be connected between the first flow channel structure 21 and the second flow channel structure 22, the heat conducting plate 23 may also be connected between two first flow channel structures 21, and the heat conducting plate 23 may also be connected between two second flow channel structures 22. By connecting the heat conducting plate 23 between two adjacent flow channel structures, the coldness of the refrigerant in the flow channel structure is transferred to other areas, thereby uniformly dissipating the heat of the battery pack 40. In other embodiments, the heat conducting plate 23 may not be required, and the adjacently arranged flow channel structures may be directly used to dissipate the heat from various areas of the battery pack 40.

[0057] In some embodiments, the cooling assembly includes at least two unit areas, each unit area is used to correspond to a battery pack 40 and perform heat exchange on the battery pack 40, and the unit area includes a first flow channel structure 21 and a second flow channel structure 22; at least two unit areas are arranged along the length direction of the battery cell. That is, the cooling assembly is provided with a unit area for each battery pack 40 in the at least two battery packs 40, and each unit area is used to perform heat exchange on the corresponding battery pack 40. The above-mentioned first flow channel structure 21 and second flow channel structure 22 are provided in the unit area for refrigerant transmission. And the unit areas are arranged along the length direction of the battery cell, that is, the arrangement of the unit areas is the same as the arrangement of the battery packs 40, thereby achieving the corresponding arrangement between the unit areas and the corresponding battery packs 40.

[0058] For example, the first flow channel structure 21 and the second flow channel structure 22 can be arranged in at least two unit areas, at least two of which are arranged along the length direction of the battery cell, that is, at least two of which are arranged along the second direction, and each unit area is used for heat exchange with the battery pack 40. That is, each unit area serves as an independent heat dissipation area and can perform heat exchange with the battery pack 40.

[0059] When arranging the flow channel structure in each unit area, various approaches can be adopted. For example, in some approaches, only the first flow channel structure 21 and the second flow channel structure 22 can be used as the heat conduction structure in the unit area for heat exchange with the battery pack 40. In this case, multiple flow channels arranged side by side can be regarded as the first flow channel structure 21 or the second flow channel structure 22 as a whole, and the first flow channel structure 21 and the second flow channel structure 22 are arranged adjacent to each other. In some embodiments, the first flow channel structure 21 and the second flow channel structure 22 can also be arranged with a gap, and the heat conduction plate 23 shown above can be used.

[0060] Exemplarily, referring to Figures 1 and 2, each unit area includes at least two flow channel structures and at least one heat conduction plate 23, wherein the at least two flow channel structures are spaced apart along a second direction perpendicular to the first direction, that is, each flow channel structure is arranged between the first side and the second side of the cooling component, the first end of each flow channel structure is located on the first side of the cooling component, and the second end of each flow channel structure is located on the second side of the cooling component. Different flow channel structures are spaced apart along the second direction, so that a gap is left between two adjacent flow channel structures for arranging the heat conduction plate 23 in the space between two adjacent flow channel structures, so as to equalize the heat or cold emitted by the two flow channel structures. At least two flow channel structures can be divided into a first flow channel structure 21 and a second flow channel structure 22 according to the flow direction of the refrigerant, wherein each unit area includes at least one first flow channel structure 21 and at least one second flow channel structure 22.

[0061] Referring to Figures 1 and 2, two adjacent flow channel structures can be separated by a heat conducting plate 23, so that the heat or cold of the refrigerant in the flow channel structure can be diffused to the entire cooling component area through the heat conducting plate 23. When setting the heat conducting plate 23, a variety of methods can be adopted. For example, a temperature equalizing plate can be used as the heat conducting plate 23 to improve the uniformity of cooling or heat dissipation of the cooling component. The material of the heat conducting plate 23 can be any material with a thermal conductivity greater than a certain threshold, thereby ensuring the heat conduction effect of the heat conducting plate 23.

[0062] When arranging the first flow channel structure 21 and the second flow channel structure 22, referring to Figures 4 and 5, it is necessary to make the first flow channel structure 21 be used to dissipate heat from the non-pole area of ​​the battery pack 40, and the second flow channel structure 22 be used to dissipate heat from the pole area of ​​the battery pack 40. For example, the first flow channel structure 21 can be set at a position close to the non-pole area of ​​the battery pack 40, and the second flow channel structure 22 can be set at a position close to the pole area of ​​the battery pack 40. The refrigerant flowing from the liquid inlet manifold into the first flow channel structure 21 first cools the non-pole area of ​​the battery pack 40 that is closer to it, and then the refrigerant flows into the second flow channel structure 22 through the connecting manifold 13, and then cools the pole area of ​​the battery pack 40 that is closer to it, thereby achieving the first flow channel structure 21 dissipating heat from the non-pole area of ​​the battery pack 40, and the second flow channel structure 22 dissipating heat from the pole area of ​​the battery pack 40.

[0063] It should be explained that when the first flow channel structure 21 dissipates heat from the non-pole area of ​​the battery pack 40, the cold energy carried by the refrigerant can be directly heat-exchanged with the non-pole area of ​​the battery pack 40 through the first flow channel structure 21, or the cold energy carried by the refrigerant can be heat-exchanged with the non-pole area of ​​the battery pack 40 through the first flow channel structure 21 and the heat conducting plate 23 connected to the first flow channel structure 21. When the second flow channel structure 22 dissipates heat from the pole area of ​​the battery pack 40, the cold energy carried by the refrigerant can be directly heat-exchanged with the pole area of ​​the battery pack 40 through the second flow channel structure 22, or the cold energy carried by the refrigerant can be heat-exchanged with the pole area of ​​the battery pack 40 through the second flow channel structure 22 and the heat conducting plate 23 connected to the second flow channel structure 22.

[0064] In some embodiments, the order of arranging the first flow channel structure 21 and the second flow channel structure 22 can be adjusted according to the position of the pole area of ​​the battery pack 40 to ensure that the non-pole area of ​​the battery pack 40 is positioned relative to the first flow channel structure 21 or the heat conducting plate 23 connected to the first flow channel structure 21, so that the refrigerant flowing in the first flow channel structure 21 is used to perform heat exchange on the non-pole area of ​​the battery pack 40, thereby making the distance between the first flow channel structure 21 and the non-pole area of ​​the battery pack 40 as small as possible, thereby improving the heat dissipation effect of the first flow channel structure 21 on the non-pole area of ​​the battery pack 40. It can also ensure that the pole area of ​​the battery pack 40 is in position, and the heat conducting plate 23 connected to the second flow channel structure 22 or the second flow channel structure 22 is arranged relative to the pole area of ​​the battery pack 40, so that the refrigerant flowing in the second flow channel structure 22 is used to perform heat exchange on the pole area of ​​the battery pack 40, thereby making the distance between the second flow channel structure 22 and the pole area of ​​the battery pack 40 as small as possible, thereby improving the heat dissipation effect of the second flow channel structure 22 on the pole area of ​​the battery pack 40.

[0065] When determining the number of first flow channel structures 21 in each unit area, the number of first flow channel structures 21 can be at least one of one, two, three, four, etc. Each first flow channel structure 21 has a first end and a second end relative to each other. The first end of each first flow channel structure 21 serves as a liquid inlet and is connected to the liquid inlet manifold; the second end of the first flow channel structure 21 serves as a liquid outlet and is connected to the connecting manifold 13, so that the refrigerant in the first flow channel structure 21 can flow from the first end of the first flow channel structure 21 to the second end and flow into the connecting manifold 13. When setting each first flow channel structure 21, each first flow channel structure 21 may include a plurality of side-by-side and separated flow channels, and each flow channel is connected from the first end of the first flow channel structure 21 to the second end of the first flow channel structure 21.

[0066] When determining the number of the second flow channel structures 22 in each unit area, the number of the second flow channel structures 22 can be at least one, two, three, four, etc. Each second flow channel structure 22 has a first end and a second end relative to each other. The first end of each second flow channel structure 22 serves as a liquid outlet and is connected to the liquid outlet manifold 14; the second end of the second flow channel structure 22 serves as a liquid inlet and is connected to the connecting manifold 13, so that the refrigerant in the second flow channel structure 22 can flow from the second end of the second flow channel structure 22 to the first end and flow into the liquid outlet manifold 14. When setting each second flow channel structure 22, each second flow channel structure 22 can include a plurality of side-by-side and separated flow channels, and each flow channel is connected from the first end of the second flow channel structure 22 to the second end of the second flow channel structure 22.

[0067] When determining the number of unit areas, the number of unit areas can be one, two, or more, with each unit area used for heat exchange with the battery pack 40. Specifically, each unit area can perform heat exchange with a row of battery packs 40, which can be located above or below the unit area. Each unit area can also perform heat exchange with two rows of battery packs 40, which can be located above and below the unit area. This allows each unit area to perform heat exchange with the corresponding battery pack 40 to reduce its temperature.

[0068] When there are at least two unit areas, referring to FIG1 , at least two unit areas are arranged along the second direction. That is, the arrangement direction of the unit areas is the same as the arrangement direction of the flow channel structure and the heat conducting plate 23 , and both are arranged along the length direction of the battery cells in the battery pack 40 .

[0069] Exemplarily, referring to Figures 1 and 2, two adjacent unit areas can be separated by a first thermal insulation board 24, thereby preventing thermal interference between different unit areas and enabling independent thermal management of different unit areas. When setting the first thermal insulation board 24, materials such as but not limited to thermal insulation foam with a thermal conductivity less than a certain threshold can be used. In some embodiments, a connecting portion 26 can be provided on the first thermal insulation board 24, and the connecting portion 26 is used to connect a baffle, wherein the baffle is used to separate two adjacent unit areas, thereby separating two adjacent battery packs 40 and preventing mutual interference between different battery packs 40. There are many ways to set the connecting portion 26. Exemplarily, a threaded connection hole can be used as the connecting portion 26. At least two connecting portions 26 are provided on the first thermal insulation board 24 to improve the reliability of the connection with the baffle.

[0070] In some embodiments, the cooling assembly may further include: a liquid inlet manifold, a liquid outlet manifold 14, and a connecting manifold 13. The flow direction of the refrigerant in the heat-conducting structure is specifically related to the connection method between the liquid inlet manifold and the liquid outlet manifold 14. For example, the liquid inlet manifold is connected to the liquid inlet of the first flow channel structure 21; the liquid outlet manifold 14 is connected to the liquid outlet of the second flow channel structure 22; and the connecting manifold 13 is connected between the liquid outlet of the first flow channel structure 21 and the liquid inlet of the second flow channel structure 22. That is, the liquid inlet manifold and the liquid outlet manifold 14 are arranged on the same side of the cooling assembly, reducing the distance between the liquid inlet manifold and the liquid outlet manifold 14, so that heat exchange can be carried out between the liquid outlet manifold 14 and the liquid inlet manifold, thereby reducing the temperature at the position of the liquid outlet manifold 14. In a specific configuration, the first end of each first flow channel structure 21 can serve as a liquid inlet, connected to the liquid inlet manifold; the second end of each first flow channel structure 21 can serve as a liquid outlet, connected to the connecting manifold 13; the first end of each second flow channel structure 22 can serve as a liquid outlet, connected to the liquid outlet manifold 14; and the second end of each second flow channel structure 22 can serve as a liquid inlet, connected to the connecting manifold 13. This allows the refrigerant flow paths between the first flow channel structure 21 and the second flow channel structure 22 to have opposite directions. Of course, in other configurations, the liquid inlet manifold and the liquid outlet manifold 14 can also be located at different locations.

[0071] Referring to Figures 1, 2 and 4, the liquid inlet manifold is used to direct the refrigerant flowing into the cooling assembly into all the first flow channel structures 21, and the liquid outlet manifold 14 is used to converge the refrigerant flowing out of the second flow channel structure 22 and then flow out of the cooling assembly. Exemplarily, the liquid inlet manifold can be a rigid tube so that the harmonica tube can be fixed. The liquid inlet manifold is arranged on the first side of the cooling assembly. Exemplarily, the liquid inlet manifold can be arranged on the first side of the cooling assembly along the second direction, that is, the extension direction of the liquid inlet manifold is parallel to the length direction of the battery cell. The liquid inlet manifold is connected to the first end of the first flow channel structure 21, so that the refrigerant can flow into the first flow channel structure 21 through the liquid inlet manifold, that is, the liquid inlet manifold plays a diversion role.

[0072] When setting up the liquid inlet manifold, referring to Figures 1, 2, and 3, the liquid inlet manifold is connected to the liquid inlet of the first flow channel structure 21 in the unit area. For example, the liquid inlet manifold can be connected to the first end of the first flow channel structure 21 in all unit areas. At the same time, the liquid inlet manifold is connected to the liquid inlet interface 16 on the cooling assembly, so that the refrigerant flowing in through the liquid inlet interface 16 can flow into each first flow channel structure 21 through the liquid inlet manifold, thereby achieving flow diversion.

[0073] In some embodiments, the arrangement of the liquid inlet manifold may also be related to the number of unit areas. For example, regardless of whether the number of unit areas is one or more, a liquid inlet manifold may be provided, and the liquid inlet manifold may be connected to the liquid inlets of all the first flow channel structures 21. For example, the liquid inlet manifold may be connected to the first ends of all the first flow channel structures 21. The liquid inlet manifold is also connected to the liquid inlet interface 16 on the cooling assembly, and the refrigerant flowing in from the liquid inlet interface 16 flows directly into each first flow channel structure 21 through the liquid inlet manifold. At this time, the input port of the liquid inlet manifold may be provided in the middle or off-center position of the liquid inlet manifold, so that the refrigerant can flow into each first flow channel structure 21 as evenly as possible.

[0074] Exemplarily, when the number of unit areas is two or more, a graded liquid inlet manifold arrangement can be adopted. For example, referring to Figures 1, 2 and 3, the liquid inlet manifold can include at least two first liquid inlet manifolds 11, each first liquid inlet manifold 11 corresponds to a unit area and is connected to the liquid inlet of the first flow channel structure 21 in the unit area. That is, at least two first liquid inlet manifolds 11 correspond one-to-one to at least two unit areas, and each first liquid inlet manifold 11 is connected to the liquid inlet of the first flow channel structure 21 in the corresponding unit area. Exemplarily, each first liquid inlet manifold 11 is connected to the first end of all the first flow channel structures 21 in the corresponding unit area. That is, a first liquid inlet manifold 11 is arranged corresponding to each unit area, and the first ends of the first flow channel structures 21 in each unit area are all connected to the same first liquid inlet manifold 11. The first flow channel structures 21 in different unit areas are connected to different first liquid inlet manifolds 11, so as to facilitate the adjustment of the flow rate of the refrigerant in different unit areas. For example, for the first liquid inlet manifold 11 corresponding to each unit area, the input port of the first liquid inlet manifold 11 can be set in the middle or near the middle of the first liquid inlet manifold 11, so that the refrigerant in each unit area can flow as evenly as possible into all the first flow channel structures 21 of the same unit area.

[0075] In some embodiments, referring to Figures 1, 2, and 3, the liquid inlet manifold may further include a second liquid inlet manifold 12, which is in communication with the first liquid inlet manifold 11. Exemplarily, the second liquid inlet manifold 12 may be in communication with all the first liquid inlet manifolds 11. The second liquid inlet manifold 12 may be in communication with the liquid inlet interface 16 on the cooling assembly, so that the refrigerant flowing in from the liquid inlet interface 16 flows into each of the first liquid inlet manifolds 11 through the second liquid inlet manifold 12, and then flows into the first flow channel structure 21 in each unit area through each of the first liquid inlet manifolds 11.

[0076] In the related art, the number of diversions at the inlet of the cooling component is small, and the diversion process is short, resulting in uneven flow distribution of each branch. The superimposed influence of the cooling direction results in large cooling differences in different areas of the cooling component and large temperature differences in the battery cells. In some embodiments of the present application, the refrigerant undergoes multiple long-distance diversions in the process of entering each unit area, and the flow of each branch is the same, ensuring that the flow distribution of each branch is uniform. For example, as can be seen from Figures 1 and 2, the refrigerant is first diverted into 2 branches, and then diverted into 4 branches. The flow in the harmonica tube is 1 / 4 of the liquid inlet interface 16, ensuring that the flow distribution of each branch is uniform.

[0077] Of course, the method for achieving communication between the liquid inlet interface 16 and the first liquid inlet manifold 11 is not limited to the method shown above, and other methods can also be used. For example, in some embodiments, each first liquid inlet manifold 11 can be communicated with the liquid inlet interface 16 through a separate connecting pipe.

[0078] Exemplarily, referring to Figures 1 and 2, the connecting manifold 13 can be set on the second side of the cooling assembly, and the second side and the first side are two opposite sides of the cooling assembly along the first direction, that is, the battery pack 40 is set between the first side and the second side. The connecting manifold 13 connects the liquid outlet of the first flow channel structure 21 and the liquid inlet of the second flow channel structure 22, that is, the refrigerant flowing out of the first flow channel structure 21 flows into the second flow channel structure 22 through the connecting manifold 13. Exemplarily, the connecting manifold 13 is connected to the second ends of the first flow channel structure 21 and the second flow channel structure 22, so that the refrigerant flowing into the first end of the first flow channel structure 21 can flow to the second end of the first flow channel structure 21 and then flow into the second end of the second flow channel structure 22 through the connecting manifold 13, thereby realizing the refrigerant diversion at the second side position of the cooling assembly. Exemplarily, the connecting manifold 13 can be a rigid tube so that the harmonica pipe can be fixed. In some embodiments, the connecting header 13 may be placed transversely on the second side of the cooling assembly along the second direction, that is, the extending direction of the connecting header 13 is parallel to the length direction of the battery cell.

[0079] Illustratively, regardless of whether the number of unit areas is one or at least two, the connecting header 13 can be a pipe connected from one end to the other end, and the second ends of all the first flow channel structures 21 and the second flow channel structures 22 are connected to the connecting header 13.

[0080] In some embodiments, when the number of unit areas is at least two, at least two connecting collecting sections may be included in the connecting collecting pipe 13, and different connecting collecting sections are not connected to each other. Different connecting collecting sections may be separated by a partition (not shown) provided in the connecting collecting pipe 13, so that the refrigerant cannot flow between different connecting collecting sections. Each unit area corresponds to a connecting collecting section, and the liquid outlet of the first flow channel structure 21 and the liquid inlet of the second flow channel structure 22 in each unit area are both connected to the corresponding connecting collecting section. That is, at least two connecting collecting sections may correspond one-to-one to at least two unit areas, and the second ends of the first flow channel structure 21 and the second flow channel structure 22 in each unit area are both connected to the corresponding connecting collecting section. Since the harmonica tubes in different unit areas cannot be connected through the connecting collecting pipe 13, the refrigerants in different unit areas are isolated from each other and do not interfere with each other.

[0081] Exemplarily, referring to Figures 1, 2, 4 and 5, the liquid outlet manifold 14 can be arranged on the first side of the cooling assembly, and the liquid outlet manifold 14 is connected to the liquid outlet of the second flow channel structure 22. For example, the liquid outlet manifold 14 is connected to the first end of the second flow channel structure 22, so that the refrigerant in the second flow channel structure 22 can flow from the connecting manifold 13 into the liquid outlet manifold 14, and the liquid outlet manifold 14 plays a role of confluence. Exemplarily, the liquid outlet manifold 14 can be a rigid tube, so that the harmonica tube can be fixed. Exemplarily, the liquid outlet manifold 14 can be arranged on the first side of the cooling assembly along the second direction, that is, the extension direction of the liquid outlet manifold 14 is parallel to the length direction of the battery cell.

[0082] In some embodiments, the inlet and outlet manifolds 14 can be stacked one above the other to improve the compactness of the manifold arrangement. If the outlet manifold 14 of the cooling assembly overheats, the inlet manifold can be used for passive temperature equalization, which helps lower the temperature at the outlet manifold 14 and minimize temperature differences within the battery pack.

[0083] Exemplarily, regardless of whether the number of unit areas is one or at least two, the liquid outlet manifold 14 can be a pipe connected from one end to the other end, and the liquid outlet manifold 14 is connected to the first ends of all the second flow channel structures 22, so that the refrigerant in all the second flow channel structures 22 flows into the liquid outlet manifold 14 and then flows out.

[0084] In some embodiments, when the number of unit areas is at least two, the liquid outlet manifold 14 can adopt a graded convergence method. Exemplarily, the liquid outlet manifold 14 can include at least two first liquid outlet manifolds 14, and each unit area is provided with a first liquid outlet manifold. The second ends of all the second flow channel structures 22 in the same unit area are connected to the same first liquid outlet manifold, reducing mutual interference between different unit areas. The refrigerant in the first liquid outlet manifold is then discharged through the liquid outlet interface 17. Exemplarily, the liquid outlet manifold 14 can also include a second liquid outlet manifold, the second liquid outlet manifold is connected to all the first liquid outlet manifolds, and the second liquid outlet manifold is also connected to the liquid outlet interface 17, thereby achieving graded convergence, improving the uniformity of the refrigerant flow between different unit areas, and thus improving the uniformity of the heat dissipation effect.

[0085] Referring to Figures 1, 4 and 5, the refrigerant can flow into the cooling assembly through the liquid inlet interface 16, and the refrigerant can flow out of the cooling assembly through the liquid outlet interface 17, that is, the liquid inlet interface 16 and the liquid outlet interface 17 serve as interfaces for connecting the cooling assembly to the external refrigerant circulation system, and the refrigerant can flow into the cooling assembly or out of the cooling assembly. Exemplarily, a refrigerant connector 15 can be provided on the cooling assembly, and the refrigerant connector 15 is used to be provided on the battery case. The refrigerant connector 15 can be provided with a liquid inlet interface 16 and a liquid outlet interface 17, so as to facilitate the external refrigerant circulation system to communicate with the cooling assembly in the battery case. Exemplarily, the liquid inlet interface 16 and the liquid outlet interface 17 can be arranged side by side on the refrigerant connector 15 in the up-down or left-right direction, so that the distance between the two interfaces is as small as possible, thereby reducing the volume of the refrigerant connector 15. Exemplarily, an opening can be opened on the battery case, and the refrigerant connector 15 is arranged at the opening position. For example, a sealing ring may be provided on the refrigerant joint 15 , which surrounds the liquid inlet interface 16 and the liquid outlet interface 17 , thereby facilitating a sealed connection between the refrigerant joint 15 and an external refrigerant circulation system.

[0086] Exemplarily, referring to Figures 1, 2 and 3, an input port is provided on the liquid inlet manifold, and the refrigerant flowing in from the liquid inlet interface 16 of the refrigerant joint 15 can flow into the liquid inlet manifold through the input port on the liquid inlet manifold, and then flow into the first flow channel structure 21 through the liquid inlet manifold. Exemplarily, the input port on the liquid inlet manifold can be connected to the liquid inlet interface 16 through the liquid inlet flexible tube 18, and the liquid inlet flexible tube 18 is connected between the liquid inlet interface 16 of the refrigerant joint 15 and the input port of the liquid inlet manifold, so as to facilitate the connection between the liquid inlet interface 16 of the refrigerant joint 15 and the liquid inlet manifold, improve assembly feasibility, improve flexibility and operability, and reduce costs. Exemplarily, the liquid inlet flexible tube 18 can be an air conditioning rubber hose structure. A cable tie can be provided on the liquid inlet flexible tube 18 to ensure that the liquid inlet flexible tube 18 can be effectively fixed after being assembled into the whole package, so as to solve the structural failure problem of the liquid inlet flexible tube 18 caused by flexible vibration under durable working conditions such as vibration. For example, a flexible / rigid connector can be provided at the inlet of the liquid inlet manifold, with one end connected to the liquid inlet manifold and the other end connected to the liquid inlet flexible tube 18. It should be understood that the connection between the inlet of the liquid inlet manifold and the liquid inlet interface 16 is not limited to the connection method using the liquid inlet flexible tube 18 shown above; other methods may also be used. For example, a rigid tube may be used to connect the liquid inlet interface 16 of the refrigerant connector 15 and the inlet of the liquid inlet manifold.

[0087] Exemplarily, referring to Figures 1, 2, and 3, an output port is provided on the liquid outlet manifold 14. After the refrigerant in the second flow channel structure 22 of the cooling assembly flows into the liquid outlet manifold 14, it flows out through the output port on the liquid outlet manifold 14 and finally flows out of the cooling assembly through the liquid outlet interface 17 on the refrigerant connector 15. Exemplarily, the output port on the liquid outlet manifold 14 can be connected to the liquid outlet interface 17 through a liquid outlet flexible tube 19. The liquid outlet flexible tube 19 is connected between the liquid outlet interface 17 of the refrigerant connector 15 and the input port of the liquid outlet manifold 14, thereby facilitating the connection between the liquid outlet interface 17 of the refrigerant connector 15 and the liquid outlet manifold 14, improving assembly feasibility, flexibility and operability, and reducing costs. Exemplarily, the liquid outlet flexible tube 19 can be an air conditioning rubber hose structure. A cable tie can be provided on the liquid outlet flexible tube 19 to ensure that the liquid outlet flexible tube 19 can be effectively fixed after being assembled into the whole package, so as to solve the problem of structural failure of the liquid outlet flexible tube 19 caused by flexible vibration under durable working conditions such as vibration. For example, a soft and hard connection joint can be provided at the output port of the liquid outlet manifold 14, with one end of the soft and hard connection joint connected to the liquid outlet manifold 14 and the other end connected to the liquid outlet flexible tube 19. It should be understood that the connection method between the output port of the liquid outlet manifold 14 and the liquid outlet interface 17 is not limited to the connection method using the liquid outlet flexible tube 19 shown above. In addition to this, other methods can also be used. For example, a rigid tube can also be used to connect the liquid outlet interface 17 of the refrigerant joint 15 and the output port of the liquid outlet manifold 14.

[0088] Exemplarily, referring to Figures 4 and 5, the battery pack 40 is provided with a pole area at both ends opposite to each other along the second direction. Exemplarily, the battery pack 40 includes a row of battery cells, and the row of battery cells is arranged in sequence along the first direction, that is, the row of battery cells is arranged in sequence from the first side of the cooling assembly to the second side of the cooling assembly. Each battery cell is provided with a pole at both ends opposite to each other in the second direction, so that a pole area is provided at both ends opposite to each other in the second direction of the battery pack 40. The battery pack 40 can adopt methods such as, but not limited to, battery modules, CTP assembly methods, etc. Exemplarily, when the battery pack 40 adopts the form of a battery module, the bottom plate 41 in the battery module can be positioned relative to the corresponding unit area and can perform heat exchange.

[0089] For example, referring to Figure 2 , each unit area may include a first flow channel structure 21 and two second flow channel structures 22, with the first flow channel structure 21 located between the two second flow channel structures 22. When a battery pack 40 is provided with a pole area at both ends of the battery pack 40, the two second flow channel structures 22 perform heat exchange with the two pole areas, respectively. The first flow channel structure 21 located between the two second flow channel structures 22 is used to dissipate heat from the non-pole area in the middle of the battery pack 40.

[0090] For example, with continued reference to FIG2 , each unit area may include two first flow channel structures 21 and two second flow channel structures 22, with the two first flow channel structures 21 located between the two second flow channel structures 22. If the battery cells in the battery pack 40 are long, the width of the non-polar region of the battery pack 40 along the length of the battery cells is also long. In this case, two first flow channel structures 21 may be provided to ensure uniform heat dissipation in the non-polar region of the battery pack 40.

[0091] Exemplarily, referring to FIG2 , each unit area can be divided into a first heat dissipation zone 31 and two second heat dissipation zones 32. The first heat dissipation zone 31 is provided with at least one first flow channel structure 21, and each second heat dissipation zone 32 is provided with at least one second flow channel structure 22. A first heat dissipation zone 31 is located between two second heat dissipation zones 32. That is, the two second heat dissipation zones 32 are respectively provided on opposite sides of the corresponding unit area along the second direction, and the first heat dissipation zone 31 is provided between the two second heat dissipation zones 32. This results in one first heat dissipation zone 31 and two second heat dissipation zones 32 being arranged alternately along the second direction. The first heat dissipation zone 31 is used to dissipate heat from the non-pole area of ​​the battery pack 40, while the second heat dissipation zone 32 is used to dissipate heat from the pole area of ​​the battery pack 40. Exemplarily, for each unit area, the second flow channel structures 22 are provided on opposite sides of the unit area along the second direction, and the first flow channel structure 21 is provided between the second flow channel structures 22 on both sides. The different flow channel structures are spaced apart and separated by a heat conducting plate 23. As a result, the refrigerant flowing in the first flow channel structure 21 is used to exchange heat with the non-pole area (the area outside the pole area) of the battery pack 40, while the refrigerant flowing in the second flow channel structure 22 is used to exchange heat with the pole area of ​​the battery pack 40. Therefore, when cooling, the refrigerant first flows through the low-temperature area of ​​the non-pole area of ​​the battery pack 40, and then flows through the high-temperature area of ​​the pole area of ​​the battery pack 40. This allows the refrigerant in the different flow channel structures to maintain a high cooling efficiency, thereby improving the heat dissipation effect. The refrigerant flow method of first cooling the low-temperature area and then cooling the high-temperature area improves the heat dissipation effect of the non-pole part of the battery cells in the battery pack.

[0092] Of course, in some embodiments, the battery pack 40 has a post region at one of its two opposite ends along the second direction (the length of the battery cell), while the other end does not. In this case, the number of the first heat dissipation region 31 and the second heat dissipation region 32 can both be one, with the second heat dissipation region 32 positioned opposite the post region of the battery pack 40 and the first heat dissipation region 31 positioned opposite the non-post region of the battery pack 40.

[0093] Exemplarily, with reference to Figures 1 and 2, the cooling assembly may further include: two second heat insulation plates 25, the two second heat insulation plates 25 are respectively arranged on both sides of the cooling assembly along the length direction of the battery cells in the battery pack. The two second heat insulation plates 25 are spaced apart, and the first flow channel structure 21 and the second flow channel structure 22 are arranged between the two second heat insulation plates 25. Exemplarily, the two second heat insulation plates 25 can be respectively arranged on both sides of the cooling assembly that are relatively distributed along the second direction (the length direction of the battery cells), so as to prevent heat transfer between the cooling assembly and the outside world, prevent the outside world from affecting the effect of the cooling assembly, and reduce the risk of condensation. When setting the second heat insulation plate 25, materials with a thermal conductivity coefficient less than a certain threshold value such as but not limited to thermal insulation foam can be used. In some embodiments, each second heat insulation plate 25 can be connected to the outermost heat conducting plate 23 of the cooling assembly along the second direction to facilitate fixing the second heat insulation plate 25.

[0094] For example, referring to Figures 1 and 2, a support block 27 can be provided on the heat conducting plate 23 to support the battery pack 40. When the battery pack 40 is placed on the cooling assembly, the support block 27 supports the battery pack 40, thereby preventing the flow channel structure and the battery pack 40 from being squeezed against each other. In a specific configuration, the support block 27 is higher than the first flow channel structure 21 and the second flow channel structure 22, that is, the support block 27 is raised relative to the first flow channel structure 21 and the second flow channel structure 22. The support block 27 can be provided on the heat conducting plate 23 using methods such as, but not limited to, brazing, screw fastening, or integral molding. Thus, when the battery pack 40 is placed on the unit area of ​​the cooling assembly, the support block 27 on the cooling assembly supports the battery pack 40, while the flow channel structure and the battery pack 40 are not in contact. The weight of the upper battery pack 40 does not act on the flow channel structure, preventing the battery pack 40 from crushing the flow channel structure and reducing the risk of the flow channel structure being easily crushed. Support blocks 27 can be made of a material with a relatively high thermal conductivity to improve heat exchange between the battery pack 40 and the cooling assembly. When battery packs 40 are located on both the upper and lower sides of the cooling assembly, support blocks 27 can be installed on both the upper and lower sides of the heat conducting plate 23 to separate the flow channel structure from the battery pack 40 and prevent damage to the flow channel structure. For example, one or more support blocks 27 can be installed on each heat conducting plate 23.

[0095] In some embodiments, referring to Figures 1, 2 and 5, when the cooling assembly further includes a heat conducting plate 23, and the heat conducting plate 23 is connected between two adjacent flow channel structures in one or more first flow channel structures 21 and one or more second flow channel structures 22, each heat conducting plate 23 can be connected to the liquid outlet manifold 14, the liquid inlet manifold or the connecting manifold 13 through a connecting block 28, thereby facilitating the fixing of the heat conducting plate 23. Exemplarily, the connecting block 28 can also be used to support the battery pack 40, that is, the connecting block 28 can support the two end positions of the battery pack 40. In the specific setting, the height of the connecting block 28 can be made higher than the first flow channel structure 21 and the second flow channel structure 22, that is, the connecting block 28 is raised relative to the first flow channel structure 21 and the second flow channel structure 22, thereby being able to separate the battery pack 40 from the flow channel structure to prevent damage to the flow channel structure.

[0096] In some embodiments, a limiting end face 29 can be provided on the connecting block 28 toward the side of the battery pack 40, and the limiting end face 29 is used to abut against the side of the battery pack 40 along the arrangement direction of the battery cells. The battery pack 40 has two opposite side faces along the arrangement direction of the battery cells (i.e., the second direction). When the battery pack 40 is assembled on the cooling assembly, the limiting end face 29 can be made to abut against one of the two side faces along the arrangement direction of the battery cells on the battery pack, thereby limiting the battery pack 40 and preventing the battery pack 40 from sliding along the second direction. Therefore, when the battery pack 40 is assembled on the cooling assembly, or the cooling assembly is assembled on the battery pack 40, the positional relationship between the cooling assembly and the battery pack 40 can be maintained by the limiting end face 29, ensuring that the cooling assembly does not move relative to the battery pack 40, thereby facilitating the fixing of the battery pack 40 or the cooling assembly. When setting the limiting end face 29, a limiting end face 29 can be set on each of the two connecting blocks 28 opposite to each other along the first direction. The limiting end faces 29 on the two oppositely positioned connecting blocks 28 are set relative to each other, thereby limiting the assembly space of the battery pack 40, thereby facilitating the positional relationship between the limiting battery pack 40 and the cooling assembly.

[0097] For example, an insulating film may be provided on the surface of the cooling assembly. By coating the surface of the cooling assembly with the insulating film, electrical defects between the cooling assembly and the battery pack 40 are prevented, thereby reducing high-voltage electrical safety risks.

[0098] In the various embodiments shown above, the liquid outlet of the first flow channel structure 21 is connected to the liquid inlet of the first flow channel structure 21. The first flow channel structure 21 is used to dissipate heat from the non-pole region of the battery pack 40, and the second flow channel structure 22 is used to dissipate heat from the pole region of the battery pack 40. As a result, the refrigerant first flows into the first flow channel structure 21 to cool the low-temperature areas of the non-pole region of the battery pack 40. The refrigerant then flows into the second flow channel structure 22 to cool the high-temperature areas of the pole region of the battery pack 40. This refrigerant flow pattern of cooling the low-temperature areas first and then the high-temperature areas improves the heat dissipation effect on the non-pole portion of the battery cells in the battery pack, reduces the temperature of the non-pole portion of the battery cells, and prevents expansion of the non-pole portion of the battery cells due to excessive temperature.

[0099] Furthermore, embodiments of the present application further provide a battery pack, as shown in Figures 1, 2, and 4. The battery pack includes a battery pack 40 and any of the aforementioned cooling assemblies. Referring to Figures 4 and 5, the first flow channel structure 21 is used to dissipate heat from the non-pole region of the battery pack 40, and the second flow channel structure 22 is used to dissipate heat from the pole region of the battery pack 40.

[0100] For example, the battery pack 40 may include a column region and a non-column region, which are arranged along the length of the cells in the battery pack 40. The specific arrangement of the column region and the non-column region can be described in the previous section. The column region is provided at at least one end of the battery pack 40. Specifically, the column region can be provided at one end of the battery pack 40 or at both ends of the battery pack 40. The specific arrangement of the column region and the non-column region can be described in the previous section.

[0101] The pole area accounts for 2% to 25% of the length of the battery cell in the battery pack, and the non-pole area accounts for 50% to 96% of the length of the battery cell. When determining the pole area and non-pole area of ​​the battery pack 40, the pole area of ​​the battery pack 40 can account for 2% to 25% of the length of the battery cell, and the non-pole area of ​​the battery pack 40 can account for 50% to 96% of the length of the battery cell. Specifically, the pole area of ​​the battery pack 40 can account for any value between 2% and 25%, such as 2%, 5%, 8%, 10%, 13%, 15%, 18%, 20%, 25%, etc., of the length of the battery cell. The non-pole area of ​​the battery pack 40 can account for any value between 50% and 96%, such as 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 60%, 96%, etc., of the length of the battery cell. For example, the pole region may account for 10% of the length of the battery cell, and the battery cell has two pole regions, which are respectively located at the two ends of the battery cell in the extension direction, and the non-pole region accounts for 80% of the length of the battery cell.

[0102] It should be explained that the pole area of ​​the battery pack 40 refers to the end position of the poles of all the battery cells in the battery pack 40. The pole area of ​​the battery pack 40 does not only refer to the pole surface of the battery pack 40, but also includes a preset length extending from the pole surface of the battery pack 40 to the inside of the battery pack 40. The size of the preset length is specifically related to the length of the pole in the battery pack 40. That is, the pole in the battery cell does not only refer to the part exposed outside the battery pack 40, but also includes the part of the battery cell that is electrically connected to the positive electrode or negative electrode in the battery cell. During the discharge or charging process of the battery pack 40, the pole area of ​​the battery pack 40 generates heat faster, so the temperature of the pole area of ​​the battery pack 40 is often higher than the non-pole area of ​​the battery pack 40 (other parts outside the pole area). In the embodiment of the present application, the refrigerant flowing from the liquid inlet manifold into the first flow channel structure 21 first cools the low-temperature area of ​​the non-polar column area of ​​the battery cell, and then flows into the second flow channel structure 22 through the connecting manifold 13, and then cools the high-temperature area of ​​the polar column area of ​​the battery pack 40. The refrigerant flow method of first cooling the low-temperature area and then cooling the high-temperature area is adopted to improve the heat dissipation effect of the non-polar column part of the battery cell in the battery pack, reduce the temperature of the non-polar column part of the battery cell, and avoid the problem of expansion of the non-polar column part of the battery cell due to excessive temperature.

[0103] Exemplarily, the first flow channel structure 21 can be set at a position close to the non-polar column area of ​​the battery pack 40, and the second flow channel structure 22 can be set at a position close to the polar column area of ​​the battery pack 40. The refrigerant flowing from the liquid inlet manifold into the first flow channel structure 21 first cools the non-polar column area of ​​the battery pack 40 that is closer thereto, and then the refrigerant flows into the second flow channel structure 22 through the connecting manifold 13, and then cools the polar column area of ​​the battery pack 40 that is closer thereto, thereby achieving the first flow channel structure 21 dissipating heat to the non-polar column area of ​​the battery pack 40, while the second flow channel structure 22 dissipates heat to the polar column area of ​​the battery pack 40.

[0104] It should be explained that when the first flow channel structure 21 dissipates heat from the non-pole area of ​​the battery pack 40, the cold energy carried by the refrigerant can be directly heat-exchanged with the non-pole area of ​​the battery pack 40 through the first flow channel structure 21, or the cold energy carried by the refrigerant can be heat-exchanged with the non-pole area of ​​the battery pack 40 through the first flow channel structure 21 and the heat conducting plate 23 connected to the first flow channel structure 21. When the second flow channel structure 22 dissipates heat from the pole area of ​​the battery pack 40, the cold energy carried by the refrigerant can be directly heat-exchanged with the pole area of ​​the battery pack 40 through the second flow channel structure 22, or the cold energy carried by the refrigerant can be heat-exchanged with the pole area of ​​the battery pack 40 through the second flow channel structure 22 and the heat conducting plate 23 connected to the second flow channel structure 22.

[0105] In some embodiments, the order of arranging the first flow channel structure 21 and the second flow channel structure 22 can be adjusted according to the position of the pole area of ​​the battery pack 40 to ensure that the non-pole area of ​​the battery pack 40 is positioned relative to the first flow channel structure 21 or the heat conducting plate 23 connected to the first flow channel structure 21, so that the refrigerant flowing in the first flow channel structure 21 is used to perform heat exchange on the non-pole area of ​​the battery pack 40, thereby making the distance between the first flow channel structure 21 and the non-pole area of ​​the battery pack 40 as small as possible, thereby improving the heat dissipation effect of the first flow channel structure 21 on the non-pole area of ​​the battery pack 40. It can also ensure that the pole area of ​​the battery pack 40 is in position, and the heat conducting plate 23 connected to the second flow channel structure 22 or the second flow channel structure 22 is arranged relative to the pole area of ​​the battery pack 40, so that the refrigerant flowing in the second flow channel structure 22 is used to perform heat exchange on the pole area of ​​the battery pack 40, thereby making the distance between the second flow channel structure 22 and the pole area of ​​the battery pack 40 as small as possible, thereby improving the heat dissipation effect of the second flow channel structure 22 on the pole area of ​​the battery pack 40.

[0106] When configuring the battery pack 40, the battery pack 40 includes multiple cells, each of which has its length parallel to the second direction, i.e., the length of each cell is perpendicular to the direction in which the flow channel structure extends. As shown in Figures 4 and 5 , each row of battery packs 40 includes multiple cells, which are arranged along the direction in which the flow channel extends. i.e., the multiple cells in each row of battery packs 40 are arranged in a straight line along the same first direction.

[0107] When determining the type of each battery cell, illustratively, each battery cell can be a short battery cell or a long battery cell. It should be explained that short batteries and long batteries have clear definitions in this field. A short battery cell is a battery cell whose length does not exceed a first preset value, and a long battery cell is a battery cell whose length exceeds a second preset value. The above-mentioned first preset value and second preset value may be equal or unequal, and even the first preset value may be greater than the second preset value. Exemplarily, the length of a short battery cell may be 400mm-900mm, and the length of a long battery cell may be 600mm-1200mm. Referring to Figure 1, the shape of the battery cell can specifically be a short battery cell or a long battery cell with a thinner thickness, or a rectangular block battery cell with a slightly thicker thickness. The rectangular block battery cell can specifically be, for example, but not limited to, a square aluminum shell battery cell. The shape of the battery cell can also be a cylindrical battery cell. At both ends of the battery cell in the second direction (the length direction of the battery cell), there are battery cell poles, specifically the positive electrode pole and the negative electrode pole of the battery cell. The positive electrode pole and the negative electrode pole of the battery cell can be respectively arranged at both ends of the battery cell in the second direction. That is, the battery cell is provided with a pole at both ends in the second direction, and the pole can be a positive pole or a negative pole. Of course, the positive pole and the negative electrode pole of the battery cell can also be arranged at only one end of the battery cell in the second direction.

[0108] Exemplarily, there are at least two layers of battery packs 40, each layer containing at least one battery pack 40, and the first flow channel structure 21 and the second flow channel structure 22 are located between two adjacent layers of battery packs 40. That is, the first flow channel structure 21 and the second flow channel structure 22 are arranged in the middle of the battery pack, representing a passive temperature-uniform cooling component.

[0109] In some embodiments, referring to FIG4 , the stacking direction of at least two layers of the battery pack 40, the arrangement direction of the battery cells in the battery pack 40, and the length direction of the battery cells are perpendicular to each other. Exemplarily, the stacking direction of the at least two layers of the battery pack 40 is the third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0110] Exemplarily, the battery pack 40 includes at least two battery packs 40 arranged along the length direction of the battery cell, that is, there may be at least two battery packs 40 in the same layer, and the at least two battery packs 40 are arranged side by side along the length direction of the battery cell.

[0111] For example, referring to FIG4 , there are two layers of battery packs 40, each of which includes two rows of battery packs 40. Each battery pack 40 includes a row of battery cells arranged along a first direction. Two battery packs 40 in the same layer of battery packs 40 are arranged along a second direction perpendicular to the first direction. The cooling assembly is provided with two unit areas, one battery pack 40 above each unit area and one battery pack 40 below each unit area. Each unit area is used to exchange heat between two battery packs 40.

[0112] Exemplarily, the battery packs 40 above and below the cooling assembly can be bonded to the cooling assembly through thermally conductive structural adhesive. Specifically, the battery pack 40 below the cooling assembly can achieve height-direction heat transfer through the thermally conductive plate 23 provided on the cooling assembly, and the battery pack 40 above the cooling assembly can contact the first flow channel structure 21 or the second flow channel structure 22 through the bottom plate 41 of the upper battery module, thereby achieving uniform temperature and height-direction heat transfer. For example, the height-direction heat transfer path can be: upper battery pack 40 → thermally conductive structural adhesive → bottom plate 41 → thermally conductive structural adhesive → harmonica tube → thermally conductive plate 23 → thermally conductive structural adhesive → lower battery pack 40.

[0113] In addition, the present application provides a vehicle, as shown in Figures 1 to 5 , comprising a vehicle body and any of the aforementioned battery packs disposed on the vehicle body. Specifically, the vehicle may be, but is not limited to, a passenger car, a truck, or a special engineering vehicle. The vehicle body comprises a frame, wheels, a gearbox, a steering wheel, and other structures, and any of the aforementioned battery packs is disposed on the vehicle body.

[0114] The present invention has been described through the above-described embodiments. However, it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling assembly, characterized in that: include: A first flow channel structure (21) and a second flow channel structure (22); The liquid outlet of the first flow channel structure is used to communicate with the liquid inlet of the second flow channel structure; and the first flow channel structure is used to dissipate heat from the non-pole area of ​​the battery pack (40), and the second flow channel structure is used to dissipate heat from the pole area of ​​the battery pack.

2. The cooling assembly according to claim 1, characterized in that The battery pack includes a plurality of battery cells, and an extension direction of a flow channel of at least one of the first flow channel structure and the second flow channel structure is the same as an arrangement direction of the battery cells in the battery pack.

3. The cooling assembly according to any one of claims 1 to 2, characterized in that: The battery pack includes a plurality of battery cells, and the arrangement direction of the first flow channel structure and the second flow channel structure is the same as the length direction of the battery cells in the battery pack.

4. The cooling assembly according to any one of claims 1 to 3, characterized in that: The first flow channel structure and the second flow channel structure are arranged at intervals; The cooling component further comprises: a heat conducting plate (23), wherein the heat conducting plate is connected between two adjacent flow channel structures among one or more of the first flow channel structures and one or more of the second flow channel structures.

5. The cooling assembly according to claim 4, characterized in that A support block (27) is provided on the heat conducting plate, and the support block is used to support the battery pack.

6. The cooling assembly according to any one of claims 1 to 5, characterized in that: The first flow channel structure is a first harmonica tube, and the second flow channel structure is a second harmonica tube.

7. The cooling assembly according to any one of claims 1 to 6, characterized in that: The cooling assembly includes at least two unit areas, each of the unit areas is used to correspond to a battery pack and perform heat exchange on the battery pack, and the unit area includes the first flow channel structure and the second flow channel structure; At least two of the unit areas are arranged along the length direction of the battery cell.

8. The cooling assembly according to claim 7, characterized in that Two adjacent unit areas are separated by a first heat insulation board (24).

9. The cooling assembly according to claim 8, characterized in that The first heat insulation board is provided with a connecting portion (26), the connecting portion being used to connect to a baffle, and the baffle being used to separate two adjacent battery packs.

10. The cooling assembly according to any one of claims 7 to 9, characterized in that: Each of the unit areas includes a first flow channel structure and two second flow channel structures, and the first flow channel structure is located between the two second flow channel structures.

11. The cooling assembly according to claim 10, characterized in that Each of the unit areas includes two first flow channel structures and two second flow channel structures, and the two first flow channel structures are located between the two second flow channel structures.

12. The cooling assembly according to any one of claims 1 to 11, characterized in that: Also includes: a liquid inlet manifold connected to the liquid inlet of the first flow channel structure; a liquid outlet manifold (14) connected to the liquid outlet of the second flow channel structure; and A connecting manifold (13) is connected between the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure.

13. The cooling assembly according to claim 12, characterized in that The cooling assembly includes at least two unit areas, each of the unit areas is used to correspond to a battery pack and perform heat exchange on the battery pack, and the unit area includes the first flow channel structure and the second flow channel structure; The liquid inlet manifold comprises at least two first liquid inlet manifolds (11), each of which corresponds to a unit area and is connected to a liquid inlet of the first flow channel structure in the unit area.

14. The cooling assembly according to claim 13, wherein: The liquid inlet manifold further comprises a second liquid inlet manifold (12), wherein the second liquid inlet manifold is in communication with all of the first liquid inlet manifolds.

15. The cooling assembly according to any one of claims 13 to 14, characterized in that: The connecting collecting pipe comprises at least two connecting collecting sections, and different connecting collecting sections are not connected to each other; Each unit area corresponds to one connecting and collecting section, and the liquid outlet of the first flow channel structure and the liquid inlet of the second flow channel structure in each unit area are both in communication with the corresponding connecting and collecting section.

16. The cooling assembly according to any one of claims 12 to 15, characterized in that: Also includes: A refrigerant connector (15) for being arranged on a battery box, wherein the refrigerant connector is provided with a liquid inlet interface (16) and a liquid outlet interface (17); The input port on the liquid inlet manifold is connected to the liquid inlet interface via a liquid inlet flexible tube (18); and the output port on the liquid outlet manifold is connected to the liquid outlet interface via a liquid outlet flexible tube (19).

17. The cooling assembly according to any one of claims 12 to 16, characterized in that: The cooling assembly further includes: a heat conducting plate connected between two adjacent flow channel structures among the one or more first flow channel structures and the one or more second flow channel structures; Both ends of the heat conducting plate are connected to the liquid outlet manifold, the liquid inlet manifold or the connecting manifold through connecting blocks (28), and the connecting blocks are also used to support the battery pack.

18. The cooling assembly according to claim 17, wherein: A limiting end surface (29) is arranged on the connection block towards one side of the battery pack, and the limiting end surface is used to abut against the side surface of the battery pack along the arrangement direction of the battery cells.

19. The cooling assembly according to any one of claims 1 to 18, characterized in that: Also includes: Two second heat insulation plates (25) are respectively arranged on both sides of the cooling assembly along the length direction of the battery cells in the battery pack.

20. A battery pack, characterized in that: include: A battery pack and a cooling assembly as claimed in any one of claims 1 to 19.

21. The battery pack according to claim 20, characterized in that: The battery pack includes a pole region and a non-pole region, the pole region and the non-pole region are arranged along the length direction of the battery cells in the battery pack, and the pole region is arranged at least at one end of the battery pack; The pole area accounts for 2% to 25% of the length of the battery cell in the battery pack, and the non-pole area accounts for 50% to 96% of the length of the battery cell.

22. The battery pack according to any one of claims 20 to 21, characterized in that: The battery pack has at least two layers, each layer includes at least one battery pack, and the first flow channel structure and the second flow channel structure are located between two adjacent layers of the battery pack.

23. The battery pack according to claim 22, characterized in that: The stacking direction of at least two layers of the battery pack, the arrangement direction of the battery cells in the battery pack and the length direction of the battery cells are perpendicular to each other.

24. The battery pack according to any one of claims 20 to 23, characterized in that: The battery pack includes at least two battery packs arranged along the length direction of the battery cells.

25. A vehicle, characterized in that: include: Vehicle body; and The battery pack according to any one of claims 20 to 24 is provided on the vehicle body.

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