Cooling assembly and battery assembly

Abstract

The utility model relates to a cooling assembly and a battery assembly. The cooling assembly comprises at least one sub-cooling assembly, each sub-cooling assembly comprises a cooling part, a heat conduction part and a plurality of cooling pipelines arranged at intervals, and the heat conduction part and the multiple cooling pipelines are all located on one side of the cooling part; the heat conduction piece comprises a plurality of first heat conduction parts and a plurality of second heat conduction parts, and the first heat conduction parts and the second heat conduction parts are alternately arranged; the plurality of cooling pipelines are in corresponding thermal contact with the plurality of second heat conduction parts; a pipeline inlet and a pipeline outlet are formed in the two ends of the cooling pipeline, a cooling cavity is formed in the cooling piece, and the pipeline inlet and the pipeline outlet are both communicated with the cooling cavity; the first heat conduction part is of a solid structure. Therefore, according to the cooling assembly and the battery assembly provided by the invention, the damage probability of the cooling assembly and the battery assembly can be reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cooling assembly and a battery assembly. Background Art

[0002] With the development demand of green environmental protection and energy saving, photovoltaic technology has emerged, which realizes the renewable utilization of energy through photoelectric conversion of sunlight, a renewable resource. During the use of solar cells, cooling components can be used to cool the solar cells.

[0003] However, during the use of the solar cell, the cooling assembly is easily damaged. Summary of the invention

[0004] Based on this, it is necessary to provide a cooling assembly and a battery assembly that can reduce the probability of damage to the cooling assembly and the battery assembly.

[0005] In a first aspect, an embodiment of the present application provides a cooling component, the cooling component includes at least one sub-cooling component, the sub-cooling component includes a cooling element, a heat conductive element and a plurality of cooling pipes arranged at intervals, the heat conductive element and the plurality of cooling pipes are both located on one side of the cooling element; the heat conductive element includes a plurality of first heat conductive parts and a plurality of second heat conductive parts, the first heat conductive parts and the second heat conductive parts are alternately arranged; the plurality of cooling pipes are in thermal contact with the plurality of second heat conductive parts correspondingly; a pipe inlet and a pipe outlet are provided at both ends of the cooling pipe, a cooling cavity is provided in the cooling element, the pipe inlet and the pipe outlet are both connected to the cooling cavity; wherein the first heat conductive part is a solid structure.

[0006] In the cooling assembly provided in the embodiment of the present application, the first heat-conducting part is a solid structure, and the first heat-conducting part can be in thermal contact with the battery core to dissipate heat from the battery core. Since the first heat-conducting part is a solid structure, the mechanical strength of the first heat-conducting part of the solid structure is relatively high, so that the first heat-conducting part of the solid structure is not easily deformed and damaged under the expansion force of the battery core, thereby extending the service life of the heat-conducting part. In addition, no cooling medium flows in the first heat-conducting part of the solid structure, so that the leakage of the cooling medium caused by the damage of the first heat-conducting part can be avoided, so as to avoid damage to the battery core and reduce the risk of use.

[0007] In one embodiment, the second heat conducting portion is a solid structure.

[0008] This is beneficial to improving the overall mechanical strength of the heat conducting member, improving the heat conduction effect between the first heat conducting part and the second heat conducting part, and facilitating rapid transfer of heat from the first heat conducting part to the cooling pipeline.

[0009] In one embodiment, in the same cooling pipeline, the cooling pipeline includes a first extension portion and a second extension portion that are connected, a pipeline inlet is provided at one end of the first extension portion away from the second extension portion, and a pipeline outlet is provided at one end of the second extension portion away from the first extension portion;

[0010] The first extension portion and the second extension portion are respectively disposed on both sides of the heat conductive member in a thickness direction, and at least one of the first extension portion and the second extension portion is in thermal contact with the heat conductive member.

[0011] In this way, by providing the first extension portion and the second extension portion, the total extension length of the cooling pipeline can be made larger, which is beneficial to increasing the thermal contact area between the cooling pipeline and the heat conductor, and is beneficial to improving the heat exchange effect between the cooling pipeline and the heat conductor.

[0012] In one of the embodiments, in the same cooling pipeline, the cooling pipeline includes a third extension portion, the first extension portion and the second extension portion are connected through the third extension portion, and the third extension portion is arranged on a side of the heat conductive member away from the cooling member and is in thermal contact with the heat conductive member.

[0013] In this way, the third extension portion can further extend the total extension length of the cooling pipeline, thereby further increasing the thermal contact area between the cooling pipeline and the heat conducting member, and further improving the heat exchange effect between the cooling pipeline and the heat conducting member.

[0014] In one of the embodiments, in the same cooling circuit, the first extension portion includes a plurality of first sub-extension portions, the extension direction of the plurality of first sub-extension portions is the same as the extension direction of the first extension portion, and the plurality of first sub-extension portions are arranged along an extension direction perpendicular to the first extension portion, the second extension portion includes a plurality of second sub-extension portions, the extension direction of the plurality of second sub-extension portions is the same as the extension direction of the second extension portion, and the plurality of second sub-extension portions are arranged along an extension direction perpendicular to the second extension portion, and the plurality of first sub-extension portions and the plurality of second sub-extension portions are correspondingly connected.

[0015] In this way, by dividing the first extension part into a plurality of first sub-extension parts, the opening size of each first sub-extension part is made smaller, which is beneficial to increasing the flow rate of the cooling medium in each first sub-extension part. By dividing the second extension part into a plurality of second sub-extension parts, the opening size of each second sub-extension part is made smaller, which is beneficial to increasing the flow rate of the cooling medium in each second sub-extension part, thereby helping to improve the cooling effect of the cooling medium.

[0016] In one of the embodiments, the opening size of the cooling pipe located at the edge of the heat conducting member is smaller than the opening size of the cooling pipe located at the center of the heat conducting member.

[0017] In this way, the opening size of the cooling pipeline located in the center of the heat conductive member is larger, so that the battery cells with higher temperatures can be cooled more specifically. In addition, the opening size of the cooling pipeline located at the edge of the heat conductive member can be smaller, which is beneficial to reducing the layout space occupied by the cooling pipeline on the heat conductive member, which is beneficial to reducing the area of ​​the heat conductive member, thereby helping to reduce the volume and weight of the sub-cooling assembly.

[0018] In one embodiment, the opening size of each cooling pipeline decreases sequentially from the center to the edge of the heat conducting member.

[0019] In this way, in the direction from the center to the edge of the heat conductor, the difference in the opening size of two adjacent cooling pipes can be made smaller, thereby improving the uniformity of heat dissipation of different battery cells by each cooling pipe, avoiding excessive local temperature of the battery assembly, and improving the temperature consistency between the battery cells.

[0020] In one embodiment, the cooling assembly includes a first confluence pipeline and a second confluence pipeline, there are multiple sub-cooling assemblies, and the multiple sub-cooling assemblies are arranged adjacent to each other. In the same sub-cooling assembly, a cold source inlet and a cold source outlet are provided on the cooling element, and the cold source inlet and the cold source outlet are both connected to the cooling cavity; the first confluence pipeline is connected to the cold source inlet of each sub-cooling assembly, and the second confluence pipeline is connected to the cold source outlet of each sub-cooling assembly;

[0021] And / or, in the same sub-cooling assembly, the cooling member includes a first cooling part and a second cooling part, the first cooling part and the second cooling part are respectively arranged on both sides of the thickness direction of the heat conductive member, the cooling cavity includes a first cooling cavity and a second cooling cavity, the first cooling cavity is located in the first cooling part, the second cooling cavity is located in the second cooling part, the first cooling cavity is connected to the pipeline inlet of each cooling pipeline, and the second cooling cavity is connected to the pipeline outlet of each cooling pipeline.

[0022] In a second aspect, an embodiment of the present application provides a battery assembly, comprising a plurality of battery cells and the cooling assembly of the first aspect; in the same sub-cooling assembly of the cooling assembly, battery cells are arranged on both sides of the thickness direction of the first heat conducting portion of the sub-cooling assembly and are in thermal contact with the battery cells.

[0023] The battery assembly provided in the embodiment of the present application includes a cooling assembly, and the first heat-conducting part is set as a solid structure, and the first heat-conducting part can be in thermal contact with the battery cell to dissipate heat from the battery cell. Since the first heat-conducting part is a solid structure, the mechanical strength of the first heat-conducting part of the solid structure is relatively high, so that the first heat-conducting part of the solid structure is not easy to be deformed and damaged under the expansion force of the battery cell, thereby extending the service life of the heat-conducting part. In addition, no cooling medium flows in the first heat-conducting part of the solid structure, so that the leakage of the cooling medium caused by the damage of the first heat-conducting part can be avoided, so as to avoid damage to the battery cell and reduce the risk of use.

[0024] In one embodiment, the battery core includes multiple outer surfaces facing different directions, the multiple outer surfaces include a first outer surface, the area of ​​the first outer surface is larger than the remaining parts of the multiple outer surfaces; the first outer surface is in thermal contact with the first heat conducting part.

[0025] In this way, since the first heat conducting portion can be in thermal contact with the first outer surface having the largest area, the heat conducting member can achieve better heat dissipation effect on the battery core. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a battery assembly provided in an embodiment of the present application.

[0027] Figure 2 A schematic diagram of the structure of a sub-cooling assembly provided in an embodiment of the present application.

[0028] Figure 3 Another schematic diagram of the structure of the sub-cooling assembly provided in an embodiment of the present application.

[0029] Figure 4 A partial cross-sectional view of a cooling sub-assembly provided in an embodiment of the present application.

[0030] Figure 5 Another partial cross-sectional view of the sub-cooling assembly provided in an embodiment of the present application.

[0031] Figure 6 A cross-sectional view of a cooling sub-assembly provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 10. Battery assembly; 11. Battery cell; 11a. First outer surface; 11b. Second outer surface; 11c. Third outer surface; 12. Cooling assembly; 100. Sub-cooling assembly; 110. Cooling element; 111. First cooling portion; 112. Second cooling portion; 113. Cooling cavity; 1131. First cooling cavity; 1132. Second cooling cavity; 114. Cold source inlet; 115. Cold source outlet; 120. Heat conducting element; 121. First heat conducting portion; 122. Second heat conducting portion; 130. Cooling pipeline; 131. First extension portion; 1311. First sub-extension portion; 132. Second extension portion; 1322. Second sub-extension portion; 133. Third extension portion; 134. Pipeline inlet; 135. Pipeline outlet. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0040] In the related art, a battery assembly may include multiple battery cells, and air cooling may be used to dissipate heat from the battery cells. However, as the energy density and integration number of the battery cells increase, the heat generated by the battery assembly further increases, resulting in air cooling being unable to meet the heat dissipation requirements of the battery cells.

[0041] Exemplarily, a liquid cooling assembly can be used to dissipate heat from the battery cell. The liquid cooling assembly can include a horizontal liquid cooling plate, which can be in thermal contact with the bottom wall of the battery cell. A first fluid cavity is provided in the horizontal liquid cooling plate, and a cooling medium flows in the first fluid cavity to take away the heat transferred from the battery cell to the horizontal liquid cooling plate. If only a horizontal liquid cooling plate is provided, a large temperature difference will result between the bottom and top of the battery cell, which is not conducive to the maximum utilization of the battery cell performance. Therefore, the liquid cooling assembly can also be provided with a vertical liquid cooling plate, and multiple battery cells and the vertical liquid cooling plate are all located on the same side of the horizontal liquid cooling plate, and the vertical liquid cooling plate can be in thermal contact with the side wall with the largest area of ​​the battery cell. A second fluid cavity is provided in the vertical liquid cooling plate, and a cooling medium can flow in the second fluid cavity to take away the heat transferred from the battery cell to the vertical liquid cooling plate, thereby reducing the temperature difference between the bottom and top of the battery cell.

[0042] However, as the battery cells expand during the charge and discharge process, they generate an expansion force on the vertical liquid cooling plate, thereby squeezing the vertical liquid cooling plate. The contact area between the side wall of the battery cell with the largest area and the vertical liquid cooling plate is larger, resulting in a larger expansion force. Since the second fluid cavity is provided in the vertical liquid cooling plate, the vertical liquid cooling plate has a hollow structure, which makes the mechanical strength of the vertical liquid cooling plate low, so that the vertical liquid cooling plate is easily deformed and ruptured under the action of the expansion force, thereby causing the vertical liquid cooling plate to be damaged. In addition, the rupture of the vertical liquid cooling plate will cause leakage of the cooling medium, which can easily damage the battery cells and increase the risk of use.

[0043] In order to solve the above problems, the embodiments of the present application provide a cooling assembly and a battery assembly. The first heat-conducting part is a solid structure, so that the first heat-conducting part can be in thermal contact with the battery cell to dissipate heat from the battery cell. Since the first heat-conducting part in thermal contact with the battery cell is a solid structure, the mechanical strength of the first heat-conducting part of the solid structure is relatively high, so that the first heat-conducting part of the solid structure is not easily deformed and damaged under the expansion force of the battery cell, thereby extending the service life of the heat-conducting part. In addition, no cooling medium flows in the first heat-conducting part of the solid structure, so that the leakage of the cooling medium caused by the damage of the first heat-conducting part can be avoided, so as to avoid damage to the battery cell and reduce the risk of use.

[0044] The following will be combined Figure 1-Figure 6 The battery assembly 10 provided in the embodiment of the present application is described.

[0045] See also Figure 1 A battery assembly 10 provided in one embodiment of the present application may include at least one battery cell 11. The embodiment of the present application is described with the number of battery cells 11 being multiple.

[0046] Exemplarily, the battery cell 11 may include a solar cell, which may include a monocrystalline silicon solar cell, a polycrystalline silicon solar cell, an amorphous silicon solar cell, a copper indium gallium selenide solar cell, a cadmium telluride solar cell, and the like.

[0047] In some embodiments, see Figure 1 The battery assembly 10 may include a cooling assembly 12 , and the cooling assembly 12 may be used to dissipate heat and cool the battery cell 11 to improve the performance of the battery cell 11 and extend the service life of the battery cell 11 .

[0048] For example, see Figure 1 and Figure 2The cooling assembly 12 may include at least one sub-cooling assembly 100. For example, the number of sub-cooling assemblies 100 may be 1, 2, 3, or 4 or more. At least one battery cell 11 may be correspondingly arranged on a sub-cooling assembly 100, and the sub-cooling assembly 100 may cool the corresponding battery cell 11. For example, a plurality of battery cells 11 may be arranged on the sub-cooling assembly 100.

[0049] See also Figure 1 , the sub-cooling component 100 may have a first direction X, a second direction Y and a third direction Z, and the first direction X, the second direction Y and the third direction Z are all different. For example, the first direction X, the second direction Y and the third direction Z may be perpendicular to each other. Exemplarily, the first direction X may be the length direction of the sub-cooling component 100, the second direction Y may be the width direction of the sub-cooling component 100, and the third direction Z may be the thickness direction of the sub-cooling component 100. The length, width and thickness in the embodiments of the present application are merely for the convenience of description and do not imply any limitation on the size. For example, the width may be greater than, equal to or less than the length. The embodiments of the present application are described by taking the example that the extension length of the sub-cooling component 100 along the first direction X is greater than the extension length of the sub-cooling component 100 along the second direction Y.

[0050] Exemplarily, when there are multiple sub-cooling assemblies 100, the multiple sub-cooling assemblies 100 can be arranged adjacent to each other, so as to help reduce the total volume of the multiple sub-cooling assemblies 100. The multiple sub-cooling assemblies 100 can be arranged in rows along the first direction X, or the multiple sub-cooling assemblies 100 can be arranged in columns along the second direction Y, or the multiple sub-cooling assemblies 100 can be arranged in multiple rows and columns along the first direction X and the second direction Y. The embodiment of the present application does not limit the arrangement of the multiple sub-cooling assemblies 100.

[0051] In an embodiment where the cooling assembly 12 includes a plurality of sub-cooling assemblies 100, the cooling assembly 12 may include a first confluence pipe and a second confluence pipe. The first confluence pipe may be connected to the cold source inlet 114 ( Figure 1 ) are connected, so that the cold source can transport the cooling medium to the cooling cavity 113 ( Figure 6 ). The second confluence pipeline can be connected to the cold source outlet 115 ( Figure 1 ) are connected so that the cold source outlet 115 of each sub-cooling assembly 100 can output the cooling medium to the outside of the cooling cavity 113 through the second confluence pipeline.

[0052] In some embodiments, see Figure 1, the battery cell 11 may include multiple outer surfaces facing different directions, the multiple outer surfaces may include a first outer surface 11a, and the area of ​​the first outer surface 11a may be greater than the rest of the multiple outer surfaces. For example, the multiple outer surfaces of the battery cell 11 may include two first outer surfaces 11a spaced apart along the second direction Y, two second outer surfaces 11b spaced apart along the first direction X, and two third outer surfaces 11c spaced apart along the third direction Z, wherein the area of ​​the first outer surface 11a may be greater than the areas of the second outer surface 11b and the third outer surface 11c. At least one of the two first outer surfaces 11a, the two second outer surfaces 11b, and the two third outer surfaces 11c may be in thermal contact with the cooling assembly 12.

[0053] The following mainly describes an example in which the cooling assembly 10 provided in the embodiment of the present application includes a sub-cooling assembly 100.

[0054] In some embodiments, see Figure 2 The sub-cooling assembly 100 may include a cooling member 110 , a heat conducting member 120 , and a plurality of cooling pipes 130 disposed at intervals. The heat conducting member 120 and the plurality of cooling pipes 130 may both be located on one side of the cooling member 110 .

[0055] For example, see Figure 2 and Figure 6 A cooling cavity 113 may be provided in the cooling element 110, and a cold source inlet 114 and a cold source outlet 115 may also be provided on the cooling element 110. Both the cold source inlet 114 and the cold source outlet 115 may be connected to the cooling cavity 113. The cold source inlet 114 may be used to connect to a cold source, and the cold source may provide a cooling medium to the cooling cavity 113 through the cold source inlet 114. For example, the cooling medium may be a liquid cooling medium. The cold source outlet 115 may also be connected to the cold source, so as to realize the recycling of the cooling medium in the cold source and the cooling element 110. Of course, the cold source outlet 115 may not be connected to the cold source.

[0056] For example, see Figure 1 The cooling member 110 may be in thermal contact with an outer surface of the battery cell 11. For example, the cooling member 110 may be in thermal contact with a third outer surface 11c of the battery cell 11, so that the battery cell 11 transfers heat to the cooling member 110 through the third outer surface 11c, and the cooling member 110 transfers heat to the cooling cavity 113 ( Figure 6 ) and removes heat through the cooling medium.

[0057] For example, see Figure 2 and Figure 6, multiple cooling pipes 130 can be in thermal contact with the heat conducting member 120, and a pipe inlet 134 and a pipe outlet 135 can be provided at both ends of the cooling pipe 130 in the extension direction, and the pipe inlet 134 and the pipe outlet 135 can be connected to the cooling cavity 113. The cooling medium in the cooling cavity 113 enters the cooling pipe 130 through the pipe inlet 134, and then returns to the cooling cavity 113 through the pipe outlet 135. The heat conducting member 120 can be in thermal contact with the battery cell 11 ( Figure 1 ), for example, the heat conductor 120 can be in thermal contact with a first outer surface 11a of the battery cell 11, so that the battery cell 11 transfers heat to the heat conductor 120 through the first outer surface 11a, and the heat conductor 120 transfers the heat to the cooling medium in the cooling pipe 130, and takes away the heat through the cooling medium. Since the cooling member 110 and the heat conductor 120 are in thermal contact with the two outer surfaces of the battery cell 11 respectively, the thermal contact area between the sub-cooling assembly 100 and the battery cell 11 is large, which can improve the cooling effect of the sub-cooling assembly 100 on the battery cell 11. In addition, since the heat conductor 120 can be in thermal contact with the first outer surface 11a with the largest area, the heat dissipation effect of the heat conductor 120 on the battery cell 11 is better. By thermally contacting the cooling member 110 with a third outer surface 11c of the battery cell 11 and thermally contacting the heat conductive member 120 with a first outer surface 11a of the battery cell 11, the temperature difference between the two ends of the battery cell 11 along the third direction Z (i.e., the top and bottom ends of the battery cell 11 in the figure) can be reduced.

[0058] Exemplarily, the material of the heat conductor 120 may include metal materials such as copper and aluminum, or may include non-metal materials such as mica, ceramic, and graphite.

[0059] Exemplarily, the cooling member 110 may be plate-shaped, the thickness direction of the cooling member 110 may be the third direction Z, and the cooling member 110 may be parallel to the plane where the first direction X and the second direction Y are located. The heat conducting member 120 may be plate-shaped, and the thickness direction of the heat conducting member 120 may be the second direction Y. The cooling member 110 and the heat conducting member 120 may intersect.

[0060] In some embodiments, see Figure 2 and Figure 4 The heat conducting member 120 may include a plurality of first heat conducting portions 121 and a plurality of second heat conducting portions 122. The first heat conducting portions 121 and the second heat conducting portions 122 may be arranged alternately. For example, the first heat conducting portions 121 and the second heat conducting portions 122 may be arranged alternately along the first direction X. For example, at least one first heat conducting portion 121 and at least one second heat conducting portion 122 may be arranged alternately. The embodiment of the present application is described by taking an example in which a first heat conducting portion 121 and a second heat conducting portion 122 are arranged alternately.

[0061] Exemplarily, the plurality of cooling pipes 130 may be in thermal contact with the plurality of second heat conducting parts 122. For example, one second heat conducting part 122 may be provided with at least one cooling pipe 130. The embodiment of the present application is described by taking one cooling pipe 130 provided with one second heat conducting part 122 as an example.

[0062] Exemplarily, the first heat-conducting part 121 may be a solid structure. Battery cells 11 may be provided on both sides of the first heat-conducting part 121 in the thickness direction, and both sides of the first heat-conducting part 121 in the thickness direction may be in thermal contact with the battery cells 11. For example, the first outer surface 11a of the battery cells 11 may be in thermal contact with the first heat-conducting part 121. In this way, since the first heat-conducting part 121 in thermal contact with the battery cells 11 is a solid structure, the mechanical strength of the first heat-conducting part 121 with a solid structure is relatively high, so that the first heat-conducting part 121 is not easily deformed and damaged under the expansion force of the battery cells 11 on both sides, thereby extending the service life of the heat-conducting part 120. In addition, no cooling medium flows in the first heat-conducting part 121 with a solid structure, thereby avoiding leakage of cooling medium caused by damage to the first heat-conducting part 121, thereby avoiding damage to the battery cells 11 by the leaked cooling medium, and reducing the risk of use.

[0063] In some embodiments, see Figure 3 and Figure 4 The second heat conducting part 122 is a part of the heat conducting member 120 in thermal contact with the cooling pipe 130. The second heat conducting part 122 may be a solid structure, which is beneficial to improving the overall mechanical strength of the heat conducting member 120, improving the heat conduction effect between the first heat conducting part 121 and the second heat conducting part 122, and facilitating the rapid transfer of heat from the first heat conducting part 121 to the cooling pipe 130. A first heat conducting part 121 and a second heat conducting part 122 may be alternately arranged along the first direction X, for example, a first heat conducting part 121 may be provided between two adjacent second heat conducting parts 122.

[0064] Exemplarily, the thickness of the first heat conducting part 121 and / or the second heat conducting part 122 may be greater than or equal to 3 mm, thereby facilitating the improvement of the mechanical strength of the heat conducting member 120, so that the heat conducting member 120 is not easily damaged. For example, the thickness of the first heat conducting part 121 and / or the second heat conducting part 122 may be 3 mm, 4 mm, 5 mm, or any value greater than 3 mm.

[0065] Exemplarily, the first heat conducting part 121 and the second heat conducting part 122 may be an integral part, which is beneficial to improve the connection stability between the first heat conducting part 121 and the second heat conducting part 122 and simplify the preparation process of the heat conducting member 120 .

[0066] The cooling pipeline 130 provided in the embodiment of the present application is described below.

[0067] In some embodiments, see Figure 3 and Figure 6 In the same cooling pipeline 130, the cooling pipeline 130 may include a first extension portion 131 and a second extension portion 132 that are in communication, a pipeline inlet 134 may be provided at one end of the first extension portion 131 away from the second extension portion 132, and a pipeline outlet 135 may be provided at one end of the second extension portion 132 away from the first extension portion 131. The cooling medium may sequentially pass through the pipeline inlet 134, the first extension portion 131, the second extension portion 132, and the pipeline outlet 135. Among them, at least one of the first extension portion 131 and the second extension portion 132 may be in thermal contact with the second heat conducting portion 122 of the heat conducting member 120. In an embodiment where both the first extension portion 131 and the second extension portion 132 are in thermal contact with the heat conductor 120, by providing the first extension portion 131 and the second extension portion 132, the total extension length of the cooling pipeline 130 can be made larger, which is beneficial to increase the thermal contact area between the cooling pipeline 130 and the heat conductor 120, and is beneficial to improve the heat exchange effect between the cooling pipeline 130 and the heat conductor 120.

[0068] For example, see Figure 3 and Figure 6 , the first extension portion 131 and the second extension portion 132 can be respectively arranged on both sides of the thickness direction of the heat conductive member 120, so that the first extension portion 131 and the second extension portion 132 can occupy a smaller arrangement space of the heat conductive member 120, which is beneficial to reducing the area of ​​the heat conductive member 120, thereby facilitating reducing the volume and weight of the sub-cooling assembly 100. For example, the first extension portion 131 and the second extension portion 132 can be respectively in thermal contact with both sides of the thickness direction of the second heat conductive member 122. For example, the first extension portion 131 and the second extension portion 132 can both extend along the third direction Z away from the cooling member 110.

[0069] In some embodiments, see Figure 3 and Figure 6 In the same cooling pipeline 130, the cooling pipeline 130 may include a third extension portion 133, and the first extension portion 131 and the second extension portion 132 may be connected through the third extension portion 133. The third extension portion 133 may improve the flexibility of setting the first extension portion 131 and the second extension portion 132. For example, the third extension portion 133 may be in thermal contact with the heat conducting member 120, and the third extension portion 133 may further extend the total extension length of the cooling pipeline 130, thereby further improving the thermal contact area between the cooling pipeline 130 and the heat conducting member 120, so as to further improve the heat exchange effect between the cooling pipeline 130 and the heat conducting member 120.

[0070] For example, see Figure 3 and Figure 6The third extension portion 133 can be arranged on the side of the heat conductive member 120 away from the cooling member 110, so that the first extension portion 131, the second extension portion 132 and the third extension portion 133 can be respectively located on three outer surfaces of the second heat conductive member 122 in different directions, so that the first extension portion 131, the second extension portion 132 and the third extension portion 133 can occupy a smaller arrangement space of the heat conductive member 120, which is beneficial to reducing the area of ​​the heat conductive member 120, thereby helping to reduce the volume and weight of the sub-cooling assembly 100.

[0071] In some embodiments, see Figure 4 and Figure 5 In the same cooling pipeline 130, the first extension portion 131 may include a plurality of first sub-extension portions 1311, the extension direction of the plurality of first sub-extension portions 1311 may be the same as the extension direction of the first extension portion 131, and the plurality of first sub-extension portions 1311 are arranged along the extension direction perpendicular to the first extension portion 131, the second extension portion 132 may include a plurality of second sub-extension portions 1322, the extension direction of the plurality of second sub-extension portions 1322 may be the same as the extension direction of the second extension portion 132, and the plurality of second sub-extension portions 1322 are arranged along the extension direction perpendicular to the second extension portion 132, and the plurality of first sub-extension portions 1311 and the plurality of second sub-extension portions 1322 are correspondingly connected. For example, one first sub-extension portion 1311 may be correspondingly connected to at least one second sub-extension portion 1322, or one second sub-extension portion 1322 may be correspondingly connected to at least one first sub-extension portion 1311. The embodiment of the present application is described by taking the corresponding connection of one first sub-extension portion 1311 and one second sub-extension portion 1322 as an example.

[0072] By configuring in this way, by dividing the first extension portion 131 into a plurality of first sub-extension portions 1311, the opening size of each first sub-extension portion 1311 is made smaller, which is beneficial to increasing the flow rate of the cooling medium in each first sub-extension portion 1311; by dividing the second extension portion 132 into a plurality of second sub-extension portions 1322, the opening size of each second sub-extension portion 1322 is made smaller, which is beneficial to increasing the flow rate of the cooling medium in each second sub-extension portion 1322, thereby facilitating improving the cooling effect of the cooling medium.

[0073] Exemplarily, the third extending portion 133 may include a plurality of third sub-extension portions, and the first sub-extension portion 1311 may be connected to the corresponding second sub-extension portion 1322 through the third sub-extension portions.

[0074] It can be understood that the battery cells 11 located at the edge of the heat conductor 120 have a larger contact area with the external environment and are less affected by the heat of the adjacent battery cells 11, while the battery cells 11 located at the center of the heat conductor 120 have a smaller contact area with the external environment and are more affected by the heat of the adjacent battery cells 11, thereby making the temperature of the battery cells 11 located at the center of the battery assembly 10 higher than the temperature of the battery cells 11 located at the edge of the battery assembly 10.

[0075] In some embodiments, the opening size of the cooling pipe 130 located at the edge of the heat conductive member 120 may be smaller than the opening size of the cooling pipe 130 located at the center of the heat conductive member 120, so that the opening size of the cooling pipe 130 located at the center of the heat conductive member 120 is larger, and the battery cells 11 with higher temperatures can be cooled more specifically. In addition, the opening size of the cooling pipe 130 located at the edge of the heat conductive member 120 may also be smaller, which is beneficial to reducing the layout space occupied by the cooling pipe 130 on the heat conductive member 120, which is beneficial to reducing the area of ​​the heat conductive member 120, thereby helping to reduce the volume and weight of the sub-cooling assembly 100.

[0076] Exemplarily, the opening size of each cooling pipe 130 can be reduced successively along the center to edge direction of the heat conductor 120. In the direction from the center to the edge direction of the heat conductor 120, the difference in the opening size of two adjacent cooling pipes 130 can be made smaller, thereby improving the uniformity of heat dissipation of different battery cells 11 by each cooling pipe 130, avoiding excessive local temperature of the battery assembly 10, and improving the temperature consistency between each battery cell 11.

[0077] Exemplarily, the opening size of the cooling pipeline 130 can be adjusted by adjusting the width of the cooling pipeline 130 along the first direction X and / or the second direction Y. For example, by changing the width of each cooling pipeline 130 along the second direction Y, the flow in each cooling pipeline 130 can be made more uniform.

[0078] The cooling element 110 provided in the embodiment of the present application is described below.

[0079] In some embodiments, see Figure 3 and Figure 6 In the same sub-cooling assembly 100 , the cooling member 110 may include a first cooling portion 111 and a second cooling portion 112 , which may be respectively disposed on both sides of the thickness direction of the heat conducting member 120 , and the first cooling portion 111 and the second cooling portion 112 may be arranged along the second direction Y. The battery cell 11 located on one side of the first heat conducting portion 121 in the thickness direction may be in thermal contact with the first cooling portion 111 , and the battery cell 11 located on the other side of the first heat conducting portion 121 in the thickness direction may be in thermal contact with the second cooling portion 112 .

[0080] For example, see Figure 3 and Figure 6 The cooling chamber 113 may include a first cooling chamber 1131 and a second cooling chamber 1132. The first cooling chamber 1131 may be located in the first cooling part 111, and the second cooling chamber 1132 may be located in the second cooling part 112. The first cooling chamber 1131 may be in communication with the pipeline inlet 134 of each cooling pipeline 130, and the first cooling chamber 1131 may also be in communication with the cold source inlet 114. The second cooling chamber 1132 may be in communication with the pipeline outlet 135 of each cooling pipeline 130, and the second cooling chamber 1132 may also be in communication with the cold source outlet 115. The cooling medium may enter the first cooling chamber 1131 of the first cooling part 111 through the cold source inlet 114, then enter each cooling pipeline 130 through the pipeline inlet 134 of each cooling pipeline 130, then enter the second cooling chamber 1132 of the second cooling part 112 through the pipeline outlet 135 of each cooling pipeline 130, and finally exit the second cooling chamber 1132 through the cold source outlet 115.

[0081] For some examples, see Figure 6 , the first cooling part 111 and the second cooling part 112 may be connected through at least one of the heat conductive member 120 and the cooling pipe 130. For example, there may be a gap between the first cooling part 111 and the second cooling part 112, and at least one of the heat conductive member 120 and the cooling pipe 130 may extend into the gap. In other examples, the first cooling part 111 and the second cooling part 112 may be directly connected, thereby reducing the difficulty of assembling the first cooling part 111 and the second cooling part 112.

[0082] In some examples, the first cooling chamber 1131 and the second cooling chamber 1132 are not directly connected, and the first cooling chamber 1131 and the second cooling chamber 1132 are connected only through the cooling pipe 130, that is, the first cooling chamber 1131 and the second cooling chamber 1132 are two independent chambers, thereby alleviating the energy loss of the cooling medium caused by the reciprocating flow of the cooling medium between the first cooling chamber 1131 and the second cooling chamber 1132, thereby alleviating the flow rate drop of the cooling medium in the cooling pipe 130 caused by the energy loss. In other examples, the first cooling chamber 1131 and the second cooling chamber 1132 can be directly connected, and the first cooling chamber 1131 and the second cooling chamber 1132 can jointly form a complete cavity, and the first cooling chamber 1131 and the second cooling chamber 1132 can also be connected to the cooling pipeline 130, so that the cooling medium can be mixed more evenly in the first cooling chamber 1131 and the second cooling chamber 1132, thereby improving the temperature uniformity of the first cooling part 111 and the second cooling part 112, so that the heat dissipation uniformity of the first cooling part 111 and the second cooling part 112 to each battery cell 11 is higher.

[0083] For example, the heat dissipation process of the battery cell 11 can be as follows: the bottom of the battery cell 11 transfers heat to the cooling element 110, and the corresponding heat is taken away by the cooling medium in the cooling element 110. The side of the battery cell 11 transfers heat to the first heat conducting part 121, and then the heat is taken away by the cooling pipes 130 at both ends of the first heat conducting part 121 along the first direction X. Figure 3 For example, the number of cooling pipes 130 can be 5. The coolant enters the cooling element 110 through the cold source inlet 114, and flows through the 5 cooling pipes 130 from left to right in sequence. Taking the leftmost cooling pipe 130 as an example, the dotted arrows a1, a2, a3, a4 and a5 show the path of the coolant flowing through the cooling pipe 130. Other cooling pipes 130 can also flow accordingly according to this design, which will not be repeated. Finally, the coolant flows out from the cold source outlet 115.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A cooling assembly, characterized in that: The cooling assembly includes at least one sub-cooling assembly, the sub-cooling assembly includes a cooling element, a heat conducting element, and a plurality of cooling pipelines arranged at intervals, the heat conducting element and the plurality of cooling pipelines are both located on one side of the cooling element; The heat conducting member comprises a plurality of first heat conducting parts and a plurality of second heat conducting parts, and the first heat conducting parts and the second heat conducting parts are arranged alternately; the plurality of cooling pipelines are in thermal contact with the plurality of second heat conducting parts in correspondence; a pipeline inlet and a pipeline outlet are provided at both ends of the cooling pipeline, a cooling cavity is provided in the cooling member, and the pipeline inlet and the pipeline outlet are both communicated with the cooling cavity; Wherein, the first heat conducting part is a solid structure.

2. The cooling assembly according to claim 1, characterized in that The second heat conducting portion is a solid structure.

3. The cooling assembly according to claim 1 or 2, characterized in that: In the same cooling pipeline, the cooling pipeline comprises a first extension portion and a second extension portion which are connected, the pipeline inlet is arranged at one end of the first extension portion which is away from the second extension portion, and the pipeline outlet is arranged at one end of the second extension portion which is away from the first extension portion; The first extension portion and the second extension portion are respectively disposed on both sides of the heat conductive member in a thickness direction, and at least one of the first extension portion and the second extension portion is in thermal contact with the heat conductive member.

4. The cooling assembly according to claim 3, characterized in that: In the same cooling pipeline, the cooling pipeline includes a third extension portion, the first extension portion and the second extension portion are connected through the third extension portion, and the third extension portion is arranged on a side of the heat conductive member away from the cooling member and is in thermal contact with the heat conductive member.

5. The cooling assembly according to claim 3, characterized in that: In the same cooling pipeline, the first extension portion includes a plurality of first sub-extension portions, the extension direction of the plurality of first sub-extension portions is the same as the extension direction of the first extension portion, and the plurality of first sub-extension portions are arranged along an extension direction perpendicular to the first extension portion, the second extension portion includes a plurality of second sub-extension portions, the extension direction of the plurality of second sub-extension portions is the same as the extension direction of the second extension portion, and the plurality of second sub-extension portions are arranged along an extension direction perpendicular to the second extension portion, and the plurality of first sub-extension portions and the plurality of second sub-extension portions are correspondingly connected.

6. The cooling assembly according to claim 1 or 2, characterized in that: The opening size of the cooling pipeline located at the edge of the heat conductive member is smaller than the opening size of the cooling pipeline located at the center of the heat conductive member.

7. The cooling assembly according to claim 6, characterized in that The opening size of each cooling pipeline decreases successively from the center to the edge of the heat conducting member.

8. The cooling assembly according to claim 1 or 2, characterized in that: The cooling assembly includes a first confluence pipeline and a second confluence pipeline, there are multiple sub-cooling assemblies, and the multiple sub-cooling assemblies are arranged adjacent to each other. In the same sub-cooling assembly, the cooling element is provided with a cold source inlet and a cold source outlet, and the cold source inlet and the cold source outlet are both connected to the cooling cavity; the first confluence pipeline is connected to the cold source inlet of each sub-cooling assembly, and the second confluence pipeline is connected to the cold source outlet of each sub-cooling assembly; And / or, in the same sub-cooling assembly, the cooling member includes a first cooling part and a second cooling part, the first cooling part and the second cooling part are respectively arranged on both sides of the thickness direction of the heat conductive member, the cooling cavity includes a first cooling cavity and a second cooling cavity, the first cooling cavity is located in the first cooling part, the second cooling cavity is located in the second cooling part, the first cooling cavity is connected to the pipeline inlet of each cooling pipeline, and the second cooling cavity is connected to the pipeline outlet of each cooling pipeline.

9. A battery assembly, characterized in that: Comprising a plurality of battery cells and a cooling assembly as described in any one of claims 1 to 8; In the same sub-cooling assembly of the cooling assembly, the battery cores are arranged on both sides of the first heat conducting portion of the sub-cooling assembly in the thickness direction and are in thermal contact with the battery cores.

10. The battery assembly according to claim 9, characterized in that: The battery core includes a plurality of outer surfaces facing different directions, the plurality of outer surfaces including a first outer surface, the area of ​​the first outer surface is larger than the remaining portions of the plurality of outer surfaces; the first outer surface is in thermal contact with the first heat conducting portion.

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