Heat exchange assembly and battery

Abstract

The utility model relates to battery technology field, concretely relates to a heat exchange subassembly and battery. The present application aims at solving how to meet the problem of battery heat dissipation and heating demand. For this, the heat exchange subassembly of the present application gradually increases the height of first lumen from the direction of first area to second area, so that the working medium liquefied in the heat dissipation section can be driven by the cooperation of capillary force and gravity when backflowing, which significantly reduces the backflow resistance and improves the heat dissipation efficiency; correspondingly, by gradually reducing the height of second lumen from the direction of first area to second area, the working medium liquefied in the second connecting section is also under the action of double driving force for efficient backflow, thereby realizing the heating function, and further making the heat exchange subassembly have efficient heat dissipation and heating capacity, which can meet the different thermal management needs of the battery.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a heat exchange component and a battery. Background Technology

[0002] Currently, batteries commonly use liquid cooling plates as heat dissipation components to absorb and transfer heat generated during charging and discharging. However, there are risks of coolant leakage due to potential seal failure at the connection between the liquid cooling plate and external piping, and electrical short-circuit hazards caused by condensation on the surface of the liquid cooling plate due to temperature differences. To address these issues, heat pipes with capillary structures are used instead of liquid cooling plates. The evaporation section of this heat pipe is located at the bottom or side of the battery module, while the condensation section is located outside the battery module. It utilizes the phase change of the working fluid (vaporization in the evaporation section absorbs heat, liquefaction in the condensation section releases heat) to achieve efficient heat transfer. However, heat pipes have inherent limitations: when the condensation section liquefies, the resistance to the return flow of the liquid working fluid may exceed the driving force of the capillary structure, preventing the liquefied working fluid from flowing back to the evaporation section, leading to the evaporation section drying out and failing. Therefore, the evaporation section must be kept lower than the condensation section. Due to the heat pipe's placement and unidirectional heat transfer characteristics, it can only dissipate heat from the battery and cannot meet the heating requirements of the battery in low-temperature environments.

[0003] Accordingly, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0004] To address at least one of the aforementioned problems in the prior art, namely, how to meet the heat dissipation and heating requirements of batteries, this application provides a heat exchange assembly comprising:

[0005] A connector, the connector comprising a first region and a second region connected to each other;

[0006] A first heat pipe filled with a first phase change working fluid includes a first tube body having a first cavity and a first capillary structure disposed on the inner wall of the first cavity; the first heat pipe includes a first connecting section disposed in the first region and a heat dissipation section disposed in the second region, and the height of the first cavity gradually increases from the first region to the second region.

[0007] The second heat pipe is filled with a second phase change working fluid and includes a second tube body having a second cavity and a second capillary structure disposed on the inner wall of the second cavity; the second heat pipe includes a second connecting section disposed in the first region and a heating section disposed in the second region, and the height of the second cavity gradually decreases from the first region to the second region.

[0008] In the preferred embodiment of the above heat exchange component, the height difference between the two ends of the first tube is ΔH1, where ΔH1 ≥ 1 mm; and / or

[0009] The height difference between the two ends of the second lumen is ΔH2, where ΔH2 ≥ 1 mm.

[0010] In the preferred embodiment of the heat exchange assembly described above, the angle between the line connecting the two ends of the first tube and the horizontal plane is α1, where 0.8°≤α1≤2°; and / or

[0011] The angle between the connection at both ends of the second lumen and the horizontal plane is α2, where 0.8°≤α2≤2°.

[0012] In the preferred embodiment of the above heat exchange assembly, the first heat pipe and the connector are two independent components; or, a first flow channel is formed in the first region, and a second flow channel is formed in the second region, the first flow channel and the second flow channel communicating to form the first cavity of the first heat pipe; and / or

[0013] The second heat pipe and the connector are two independent components connected together; or, a third flow channel is formed on the first region and a fourth flow channel is formed on the second region, and the third flow channel and the fourth flow channel communicate to form the second cavity of the second heat pipe.

[0014] In the preferred embodiment of the heat exchange component described above, the connector further includes a third region, which is disposed between the first region and the second region; and

[0015] The first tube body further includes a first heat-insulating section disposed in the third region, the first heat-insulating section being disposed between the first connecting section and the heat dissipation section; and / or

[0016] The second tube also includes a second insulation section disposed in the third region, the second insulation section being disposed between the second connecting section and the heating section.

[0017] In the preferred embodiment of the above heat exchange component, the height of the first cavity in the first insulation section gradually increases from the first region to the second region, and the height of the highest point of the first cavity in the first insulation section is less than or equal to the height of the lowest point of the first cavity in the heat dissipation section, and the height of the lowest point of the first cavity in the first insulation section is greater than or equal to the height of the highest point of the first cavity in the first connecting section.

[0018] The height of the second cavity in the second insulation section gradually decreases from the first region to the second region, and the height of the highest point of the second cavity in the second insulation section is less than or equal to the height of the lowest point of the second cavity in the second connecting section, and the height of the lowest point of the second cavity in the second insulation section is greater than or equal to the height of the highest point of the second cavity in the heating section.

[0019] In the preferred embodiment of the above heat exchange component, the heat exchange component further includes a heat sink, which is disposed on the second region corresponding to the heat dissipation section; and / or

[0020] The heat exchange assembly further includes a heating element, which is disposed on the second region corresponding to the heating section.

[0021] In the preferred technical solution of the above heat exchange component, the actual filling amount of the phase change working fluid is M1, M0≤M1≤1.1M0;

[0022] M0 is obtained through the following formula:

[0023]

[0024] Where M0 is the theoretical filling amount of the phase change working fluid, and V v Where A is the steam volume, ε is the porosity, and A is the volume of steam. w Let A be the cross-sectional area of ​​the tube. v ρ is the cross-sectional area of ​​the tube. l Let ρ be the density of the liquid working fluid. v The density is the density of the gaseous working fluid.

[0025] In the preferred embodiment of the above heat exchange assembly, the first heat pipe and the second heat pipe are arranged in the same row, and multiple first heat pipes and multiple second heat pipes are alternately arranged along the length or width direction of the connector; or

[0026] The first heat pipe and the second heat pipe are arranged at intervals along the thickness direction of the connector, and a plurality of the first heat pipes are arranged at intervals along the length or width direction of the connector, and a plurality of the second heat pipes are arranged at intervals along the length or width direction of the connector.

[0027] This application also provides a battery, which includes a battery module and a heat exchange component as described in any of the above preferred technical solutions, wherein the portion of the heat exchange component corresponding to the first region is disposed on the battery module.

[0028] Those skilled in the art will understand that the heat exchange assembly of this application, by setting the height of the first cavity to gradually increase from the first region to the second region, allows the liquefied working fluid in the heat dissipation section to be simultaneously driven by capillary force and gravity during reflux, significantly reducing reflux resistance and improving heat dissipation efficiency; correspondingly, by setting the height of the second cavity to gradually decrease from the first region to the second region, the liquefied working fluid in the second connecting section is also efficiently refluxed under the action of dual driving forces, thereby achieving the heating function, thus enabling the heat exchange assembly to have both efficient heat dissipation and heating capabilities, which can meet different thermal management needs of the battery.

[0029] Furthermore, by setting the height difference between the two ends of the first cavity to be greater than or equal to 1 mm, the liquefied working fluid in the heat dissipation section can be simultaneously driven by capillary force and gravity during the reflux process, effectively reducing the reflux resistance of the liquid working fluid and improving heat dissipation performance. In addition, by setting the height difference between the two ends of the second cavity to be greater than or equal to 1 mm, the liquefied working fluid in the second connecting section can be simultaneously driven by capillary force and gravity during the reflux process, effectively reducing the reflux resistance of the liquid working fluid and improving heating performance.

[0030] Furthermore, by setting the first heat pipe and the connector as two independent components, or by forming a first flow channel in the first region and a second flow channel in the second region, with the first and second flow channels connected to form the first cavity of the first heat pipe, the height of the first cavity can gradually increase from the first region to the second region, thereby effectively reducing the backflow resistance of the liquid working fluid and improving the heat dissipation capacity of the first heat pipe. In addition, by setting the second heat pipe and the connector as two independent components, or by forming a third flow channel in the first region and a fourth flow channel in the second region, with the third and fourth flow channels connected to form the second cavity of the second heat pipe, the height of the second cavity can gradually decrease from the first region to the second region, thereby effectively reducing the backflow resistance of the liquid working fluid and improving the heating capacity of the second heat pipe.

[0031] Furthermore, by setting the height of the first cavity in the first insulation section to gradually increase from the first region to the second region, and setting the height of the highest point of the first cavity in the first insulation section to be less than or equal to the height of the lowest point of the first cavity in the heat dissipation section, and setting the height of the lowest point of the first cavity in the first insulation section to be greater than or equal to the height of the highest point of the first cavity in the first connecting section, the backflow resistance of the liquid working fluid is avoided due to excessively high local positions of the first cavity in the first insulation section. In addition, by setting the height of the second cavity in the second insulation section to gradually decrease from the first region to the second region, and setting the height of the highest point of the second cavity in the second insulation section to be less than or equal to the height of the lowest point of the first cavity in the second connecting section, and setting the height of the lowest point of the second cavity in the second insulation section to be greater than or equal to the height of the highest point of the second cavity in the heating section, the backflow resistance of the liquid working fluid is avoided due to excessively high local positions of the second cavity in the second insulation section.

[0032] Furthermore, by providing a heat sink in the second region corresponding to the heat dissipation section, the heat dissipation area and capacity of the heat dissipation section can be increased, thereby improving the liquefaction rate of the working fluid and thus enhancing the battery's heat dissipation performance. In addition, by providing a heating element in the second region corresponding to the heating section, the heating area and heating capacity of the heating section can be increased, thereby improving the vaporization rate of the working fluid and thus enhancing the battery's heating performance. Attached Figure Description

[0033] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0034] Figure 1 This is a structural diagram of the battery in this application;

[0035] Figure 2 yes Figure 1 Cross section of the heat exchanger assembly Figure 1 ;

[0036] Figure 3 yes Figure 1 Cross section of the heat exchanger assembly Figure 2 ;

[0037] Figure 4 This is a structural diagram of the second embodiment of the heat exchange component of this application;

[0038] Figure 5 This is a structural diagram of the third embodiment of the heat exchange component of this application;

[0039] Figure 6 This is a structural diagram of the fourth embodiment of the heat exchange component of this application.

[0040] The attached figures are labeled as follows:

[0041] 1. First heat pipe; 11. First pipe body; 111. First connecting section; 112. Heat dissipation section; 113. First insulation section; 12. First cavity; 121. First capillary structure; 2. Second heat pipe; 21. Second pipe body; 211. Second connecting section; 212. Heating section; 213. Second insulation section; 22. Second cavity; 221. Second capillary structure; 3. Connector; 31. First region; 32. Second region; 33. Third region; 4. Heat dissipation component; 5. Heating component; 6. Battery module. Detailed Implementation

[0042] Preferred embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0043] It should be noted that in the description of this application, the terms "upper", "lower", "inner", "top", "bottom", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0044] Furthermore, it should be noted that, in the description of this application, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] like Figure 1-6 The battery of this application is described as shown.

[0046] See Figure 1-3The battery includes a heat exchange assembly and a battery module 6. The heat exchange assembly is located at the bottom of the battery module 6 and serves to exchange heat with the battery module 6. The heat exchange assembly includes a connector 3 and a first heat pipe 1 and a second heat pipe 2 disposed thereon. The connector 3 has a plate-like structure and includes a first region 31, a second region 32, and a third region 33, which is connected to the first region 31 and the second region 32, respectively. The first heat pipe 1 dissipates heat from the battery module 6 and is integrated within the connector 3. Specifically, a first flow channel is formed in the first region 31, a second flow channel is formed in the second region 32, and a fifth flow channel is formed in the third region 33, which communicates with the first and second flow channels respectively. A first capillary structure 121 is provided on the inner walls of the first, fifth, and second flow channels. The flow channel formed by the connection of the first, fifth, and second flow channels constitutes the first cavity 12 of the first heat pipe 1. The two ends of the first cavity 12 are closed, and the first capillary structure 121 is provided on the inner wall of the first cavity 12. The first cavity 12 is filled with a first phase change working fluid. The connecting member surrounding the first cavity serves as the first tube body 11, which includes a first connecting section 111 located in the first region 31, a first insulating section 113 located in the third region, and a heat dissipation section 112 located in the second region. When the battery module 6 needs heat dissipation, the first connecting section 111 absorbs heat and causes the working fluid to evaporate and vaporize. After passing through the first insulating section 113, the gaseous working fluid condenses and liquefies in the heat dissipation section 112 and releases heat. The liquid working fluid in the heat dissipation section 112 flows back to the first connecting section 111 under the capillary force driven by the capillary structure, thereby achieving the purpose of heat dissipation for the battery module 6.

[0047] In the exemplary embodiments, the specific structure of the heat exchange assembly is not fixed in this application, and those skilled in the art can adjust it as needed. For example, the first heat pipe 1 and the connector 3 can also be two independent components, such as... Figure 4 and 6 As shown, the heat exchange assembly is located on the side wall of the battery module. Specifically, the first heat pipe 1 includes a first pipe body 11 and a first capillary structure. The first pipe body 11 is located on the side wall of the battery module along its thickness direction, and has a first cavity closed at both ends. The first capillary structure is provided on the inner wall of the first cavity, and the first cavity is filled with a first phase change working fluid. The first pipe body 11 includes a first connecting section 111, a first insulating section 113, and a heat dissipation section 112. The first connecting section 111 is located in the first region 31, the first insulating section 113 is located in the third region, and the heat dissipation section 112 is located in the second region 32. The first insulating section 113 connects the first connecting section 111 and the heat dissipation section 112.

[0048] In exemplary embodiments, this application does not limit the first phase change working medium, as long as it can be vaporized and condensed. For example, the first phase change working medium can be water, liquid ammonia, acetone, fluorinated hydrocarbons, or alkanes. Among them, fluorinated hydrocarbons can be Freon, and alkanes can be n-pentane.

[0049] See next Figure 2 The first lumens 12 at the first connecting section 111, the first insulation section 113, and the heat dissipation section 112 all gradually increase in the direction from the first region 31 to the second region 32, ensuring that the first lumens 12 at the heat dissipation section 112 are generally at a higher position and the first lumens 12 at the first connecting section 111 are generally at a lower position. This makes the lowest point of the first lumens 12 at the heat dissipation section 112 in the second direction greater than or equal to the highest point of the first lumens 12 at the first connecting section 111 in the second direction and the highest point of the first lumens 12 at the first insulation section 113 in the second direction. The lowest point of the first lumens 12 at the first insulation section 113 in the second direction is greater than or equal to the highest point of the first lumens 12 at the first connecting section 111 in the second direction. In this configuration, the lowest point of the first cavity 12 in the second direction is located at the first connecting section 111, and the highest point in the second direction is located at the heat dissipation section 112. The height difference between the highest and lowest points of the entire first cavity 12 in the second direction is equal to the height difference between the two ends of the first cavity 12, which is ΔH1, where ΔH1 ≥ 1 mm. The angle between the line connecting the two ends of the first cavity 12 and the connector 3 on one side in the second direction is α1, where 0.8° ≤ α1 ≤ 2°. This configuration avoids increasing the backflow resistance of the liquid working fluid due to the excessively high local positions of the first connecting section 111 and the first insulation section 113, ensuring that the heat dissipation section 112 is positioned relatively high. This allows the liquid working fluid to be simultaneously driven by capillary force and gravity during backflow, effectively reducing flow resistance.

[0050] It should be noted that the first direction refers to, for example, Figure 1 The X direction shown includes both the positive and negative directions indicated by the arrow. The second direction refers to... Figure 1 and 4 -6 shows the Z-direction, including the positive and negative directions indicated by the arrow. The first and second directions are perpendicular to each other. In this application, the highest and lowest points refer to... Figure 1 and 4 -6 indicates the relative height position along the Z-direction arrow. Since the connector 3 is located at the bottom of the battery module 6, and the bottom of the battery module 6 is usually installed parallel to the horizontal plane, both sides of the connector 3 in the second direction can be regarded as horizontal planes. It should also be noted that in this application, since the inner diameter of the cavity is small, the "point" is not a point in the geometric sense, but specifically refers to the cross-section of the cavity.

[0051] In an exemplary embodiment, the first cavity 12 at the first connecting section 111 can be either straight or curved, as long as the height of the first cavity 12 at the first connecting section 111 gradually increases from the first region 31 to the second region 32 in the second direction. Similarly, the first cavity 12 at the first insulating section 113 can be either straight or curved, as long as the height of the first cavity 12 at the first insulating section 113 gradually increases from the first region 31 to the second region 32 in the second direction. Likewise, the first cavity 12 at the heat dissipation section 112 can be either straight or curved, as long as the height of the first cavity 12 at the heat dissipation section 112 gradually increases from the first region 31 to the second region 32 in the second direction.

[0052] See next Figure 1-2 There are multiple first heat pipes 1, and the first cavities of the multiple first heat pipes 1 are spaced apart along a third direction on the connector 3, where the third direction is the width direction of the connector 3. Since the second region 32 and the third region 33 are located outside the battery module 6, the first insulation section 113 and the heat dissipation section 112 both extend outside the battery module 6, so that the heat generated by the battery module 6 during charging and discharging can be transferred to the first connecting section 111. The working fluid in the first connecting section 111 absorbs heat and vaporizes. After passing through the first insulation section 113, the gaseous working fluid condenses and liquefies in the heat dissipation section 112 and releases heat. The liquid working fluid in the heat dissipation section 112 flows back to the first connecting section 111 under the dual drive of capillary force and gravity of the capillary structure, realizing the cyclic phase change heat transfer of the working fluid.

[0053] It should be noted that "third-party" refers to, for example... Figure 1 The Y-direction shown includes both the positive and negative directions indicated by the arrows. The third direction is perpendicular to the first and second directions, respectively.

[0054] In an exemplary embodiment, when the connector 3 and the first heat pipe 1 are two independent components, this application does not limit the connection method between them, as long as the first heat pipe 1 is mounted on the connector 3. For example, the first heat pipe 1 can be pasted onto the connector 3.

[0055] In exemplary embodiments, the arrangement of the multiple first heat pipes 1 at intervals is not fixed and can be adjusted by those skilled in the art according to the setting requirements. For example, when the first region 31 is located at the bottom of the battery module 6, the multiple first heat pipes 1 can also be formed at intervals along a first direction on the connector 3. In this case, the first direction corresponds to the length direction of the connector 3, and the third direction corresponds to the width direction of the connector 3. When the first region 31 is located on the side wall of the battery module 6, the multiple first heat pipes 1 are arranged at intervals along a second direction on the connector 3. In this case, the second direction may be the length direction or the width direction of the connector, depending on the specific side wall position of the battery module 6. Furthermore, the first heat pipes and the connector 3 can be two independent components, such as... Figure 4 and 6 As shown, it can also be integrated into the connector, such as Figure 5 As shown.

[0056] See next Figure 3 The second heat pipe 2 heats the battery module 6 and is integrated into the connector 3. A third flow channel is formed in the first region 31, a fourth flow channel is formed in the second region 32, and a sixth flow channel is provided in the third region 33, which is connected to the third and fourth flow channels respectively. The inner walls of the third, fourth, and sixth flow channels are provided with second capillary structures 221. The flow channel formed by the connection of the third, fourth, and sixth flow channels is the second cavity 22 of the second heat pipe 2. The two ends of the second cavity 22 are closed, and the inner wall of the second cavity 22 is provided with second capillary structures 221. The second cavity 22 is filled with a second phase change working fluid. The connector around the second cavity serves as the second tube body 12. The second tube body includes a second connecting section 211 located in the first region 31, a second insulating section 213 located in the third region, and a heating section 212 located in the second region. When the battery module 6 needs to be heated, the heating section 212 absorbs heat to cause the working fluid to evaporate and vaporize. The gaseous working fluid passes through the second adiabatic section 213 and then condenses and liquefies in the second connecting section 211, releasing heat. The liquid working fluid in the second connecting section 211 flows back to the heating section 212 under the capillary force of the capillary structure, thereby achieving the purpose of heating the battery module 6.

[0057] In the exemplary embodiments, the specific structure of the heat exchange assembly is not fixed in this application, and those skilled in the art can adjust it as needed. For example, the second heat pipe 2 and the connector 3 can also be independent components, such as... Figure 4 and 6At this time, the heat exchange components are disposed on the side wall of the battery module and arranged at intervals along the second direction. Specifically, the second heat pipe 2 includes a second pipe body 21 and a second capillary structure 221. The second pipe body 21 has a second cavity 22 closed at both ends, and the second capillary structure 221 is disposed on the inner wall of the second cavity 22. The second cavity 22 is filled with a second phase change working fluid. The second pipe body 21 includes a second connecting section 211, a second insulating section 213, and a heating section 212, wherein the second connecting section 211 is disposed on the first region 31, the second insulating section 213 is disposed on the third region 33, and the heating section 212 is disposed on the second region 32. The second insulating section 213 connects the second connecting section 211 and the heating section 212 respectively.

[0058] In exemplary embodiments, this application does not limit the second phase change working medium, as long as it can be vaporized and condensed. For example, the second phase change working medium can be water, liquid ammonia, acetone, fluorinated hydrocarbons, or alkanes. Among them, fluorinated hydrocarbons can be Freon, and alkanes can be n-pentane. In addition, the second phase change working medium can be the same as or different from the first phase change working medium, depending on the specific setup requirements.

[0059] In the exemplary embodiment, the provision of the third region 33 is not mandatory, and those skilled in the art can choose it as needed. Without the third region 33, the first region is directly connected to the second region, and in this case, the first insulation section 113 in the first heat pipe and the second insulation section in the second heat pipe are also absent.

[0060] See next Figure 3The second lumens 22 at the second connecting section 211, the second insulating section 213, and the heating section 212 all gradually decrease in size along the direction from the first region 31 to the second region 32, ensuring that the second lumens 22 at the second connecting section 211 are generally at a higher position and the second lumens 22 at the heating section 212 are at a lower position. This makes the highest point of the second lumens 22 at the heating section 212 in the second direction less than or equal to the lowest point of the second lumens 22 at the second connecting section 211 in the second direction and the lowest point of the second lumens 22 at the second insulating section 213 in the second direction. The highest point of the second lumens 22 at the second insulating section 213 in the second direction is less than or equal to the lowest point of the second lumens 22 at the second connecting section 211 in the second direction. In this design, the lowest point of the second cavity 22 in the second direction is located at the heating section 212, and the highest point in the second direction is located at the second connecting section 211. The height difference between the highest and lowest points of the entire second cavity 22 in the second direction is equal to the height difference between the two ends of the second cavity 22, which is ΔH2, where ΔH2 ≥ 1 mm. The angle between the line connecting the two ends of the second cavity 22 and the connector 3 on one side in the second direction is α2, where 0.8° ≤ α2 ≤ 2°. This arrangement avoids increasing the backflow resistance of the liquid working fluid due to the excessively high local positions of the heating section 212 and the second insulation section 213, ensuring that the second connecting section 211 is in a relatively high position. This allows the liquid working fluid to be simultaneously driven by capillary force and gravity during backflow, effectively reducing flow resistance.

[0061] In an exemplary embodiment, the first cavity 12 at the second connecting section 211 can be either straight or curved, as long as the height of the second cavity 22 at the second connecting section 211 gradually decreases in the second direction from the first region 31 to the second region 32. Similarly, the second cavity 22 at the second insulating section 213 can be either straight or curved, as long as the height of the second cavity 22 at the second insulating section 213 gradually decreases in the second direction from the first region 31 to the second region 32. Likewise, the second cavity 22 at the heating section 212 can be either straight or curved, as long as the height of the second cavity 22 at the heating section 212 gradually decreases in the second direction from the first region 31 to the second region 32.

[0062] See next Figure 1 and 3There are multiple second heat pipes 2, and the second cavities of the multiple second heat pipes 2 are spaced apart along a third direction on the connector 3, where the third direction is the width direction of the connector 3. The multiple second heat pipes 2 and the multiple first heat pipes 1 are each treated as an independent group, and these two groups are arranged alternately along the third direction of the connector 3. Since the second region 32 and the third region 33 are located outside the battery module 6, the second insulating section 213 and the heat dissipation section 112 of the multiple second heat pipes 2 extend outside the battery module 6. When the battery module 6 needs to be heated, the working fluid in the heating section 212 absorbs heat and vaporizes. The gaseous working fluid condenses and liquefies in the second connecting section 211 after passing through the second insulating section 213, releasing heat. The liquid working fluid in the heating section 212 flows back to the second connecting section 211 under the dual drive of capillary force and gravity of the capillary structure, thereby achieving the heating of the battery module 6.

[0063] In an exemplary embodiment, when the connector 3 and the second heat pipe 2 are two independent components, this application does not limit the connection method between them, as long as the second heat pipe 2 is disposed on the connector 3. For example, the second heat pipe 2 can be pasted onto the connector 3.

[0064] In exemplary embodiments, the arrangement of the multiple second heat pipes 2 is not fixed and can be adjusted as needed by those skilled in the art. For example, when the first region 31 is located at the bottom of the battery module 6, the multiple second heat pipes 2 can also be spaced apart on the connector 3 along a first direction, where the first direction corresponds to the length direction of the connector 3 and the third direction corresponds to the width direction of the connector 3. When the first region 31 is located on the side wall of the battery module 6, the multiple second heat pipes 2 are spaced apart on the connector 3 along a second direction, where the second direction may be the length or width direction of the connector depending on the specific side wall position of the battery module 6, and the second heat pipes and the connector 3 can be two independent components, such as... Figure 4 and 6 As shown, it can also be integrated into the connector, such as Figure 5 As shown.

[0065] It should be noted that when the first heat pipe 1, the second heat pipe 2, and the connector 3 are independent components, the first heat pipe 1 and the second heat pipe 2 can be located on the same side of the connector's thickness direction, such as... Figure 6 As shown, they can also be respectively set on both sides of the thickness direction of the connector, such as... Figure 4As shown. When the first heat pipe 1 and the second heat pipe 2 are located on one side of the connector in the thickness direction, they are arranged alternately. When the first heat pipe 1 and the second heat pipe 2 are located on both sides of the connector in the thickness direction, multiple first heat pipes 1 are arranged at intervals along the length or width direction of the connector 3, and multiple second heat pipes 2 are arranged at intervals along the length or width direction of the connector 3. When both the first heat pipe 1 and the second heat pipe 2 are integrated into the connector 3, the flow channels of these two heat pipes can be arranged in the same row, and the first heat pipe 1 and the second heat pipe 2 are arranged alternately in the length or width direction of the connector, as shown. Figure 5 As shown; or the flow channels of the two heat pipes are arranged at intervals along the thickness direction of the connector, in which case multiple first cavities are arranged at intervals along the length or width direction of the connector 3, and multiple second cavities are arranged at intervals along the length or width direction of the connector 3.

[0066] See next Figure 1 The battery also includes a heat sink 4 and a heating element 5, both of which are located in the second region 32. When heat dissipation is required, the heat sink 4 operates while the heating element 5 does not. The heat sink 4 accelerates the condensation rate of the first phase change working fluid in the heat dissipation section 112, improving the battery's heat dissipation performance. When heat dissipation is required, the heat sink 4 does not operate while the heating element 5 operates. The heating element 5 heats the second phase change working fluid in the heating section 212, causing it to liquefy and enter the second connecting section 211 via the second insulation section 213, thereby heating the battery module 6. The actual filling amount of the phase change working fluid in the first heat pipe 1 and the second heat pipe 2 can be obtained as follows: the actual filling amount of the phase change working fluid is M1, where M0 ≤ M1 ≤ 1.1M0, and M0 is obtained using the following formula:

[0067]

[0068] Where M0 is the theoretical filling amount of the phase change working fluid, and V v Where A is the steam volume, ε is the porosity, and A is the volume of steam. w Let A be the cross-sectional area of ​​the tube. v ρ is the cross-sectional area of ​​the tube. l Let ρ be the density of the liquid working fluid. v The density is the gaseous working fluid density. By calculating the actual filling amount of the first phase change working fluid in the first heat pipe 1 and the actual filling amount of the second phase change working fluid in the second heat pipe 2 using the above method, on the one hand, the efficient heat exchange capacity of the first heat pipe 1 and the second heat pipe 2 can be ensured, and on the other hand, a stable working fluid circulation can be formed between the first connecting section 111 and the heat dissipation section 112 and between the second connecting section 211 and the heating section 212, effectively avoiding the occurrence of drying or flooding.

[0069] It should be noted that the theoretical filling quantity M0 is in kg. Steam volume Vv The volume is the difference between the total volume of the tube lumen and the volume of the phase change working fluid in the heat pipe before vaporization, expressed in cubic meters (m³). 3 Porosity ε is the porosity of the capillary structure, which is dimensionless. The cross-sectional area A of the tube... w The area of ​​the annular cross-section formed between the inner and outer walls of the pipe, expressed in m². 2 The cross-sectional area A of the tube. v The area of ​​the circular cross-section enclosed by the inner wall of the tube, in meters. 2 The density ρ of the liquid working fluid l This refers to the density of the phase change working fluid in the liquid phase, expressed in kg / m³. 3 Density ρ of gaseous working fluid v This refers to the density of the phase change working fluid in the gaseous phase, expressed in kg / m³. 3 .

[0070] It should be noted that when the heat pipe is integrated into the connector 3, that is, when a flow channel equivalent to the heat pipe is formed on the connector 3, the cross-sectional area Aw in the formula for calculating the theoretical filling amount of the phase change working fluid in each flow channel is determined as follows: When one side of the connector is in contact with the battery module, the average vertical distance from the side of the connector in contact with the battery module to the inner wall of the flow channel is taken as the thickness of the annular cross-section, and the area of ​​the annular cross-section can be calculated accordingly. When both sides of the connector are in contact with the battery module, the thickness of the annular cross-section of any heat pipe flow channel is: the average vertical distance from one contact side of the connector to the inner wall of the flow channel is the first value, the average vertical distance from the other contact side of the connector to the inner wall of the flow channel is the second value, and the minimum value between the first and second values ​​is taken as the thickness of the annular cross-section of the heat pipe.

[0071] In exemplary embodiments, the types of heat sink 4 and heating element 5 are not limited, as long as they facilitate the heat dissipation of the first phase change working fluid in the heat dissipation section 112 and the heating of the second phase change working fluid in the heating section 212. For example, the heat sink 4 can be a fin, a liquid guide tube, or a cooling plate. And / or, the heating element 5 can be a heating plate.

[0072] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0073] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A heat exchange component, characterized in that, The heat exchange assembly includes: A connector (3) comprising a first region (31) and a second region (32) connected to each other; A first heat pipe (1) filled with a first phase change working fluid includes a first tube body (11) having a first cavity (12) and a first capillary structure (121) disposed on the inner wall of the first cavity (12); the first heat pipe (1) includes a first connecting section (111) disposed in the first region (31) and a heat dissipation section (112) disposed in the second region (32), and the height of the first cavity (12) gradually increases from the first region (31) to the second region (32); The second heat pipe (2) is filled with a second phase change working fluid. It includes a second tube body (21) having a second cavity (22) and a second capillary structure (221) disposed on the inner wall of the second cavity (22). The second heat pipe (2) includes a second connecting section (211) disposed in the first region (31) and a heating section (212) disposed in the second region (32). The height of the second cavity (22) gradually decreases from the first region (31) to the second region (32).

2. The heat exchange assembly according to claim 1, characterized in that, The height difference between the two ends of the first lumen (12) is ΔH1, where ΔH1 ≥ 1 mm; and / or The height difference between the two ends of the second cavity (22) is ΔH2, where ΔH2 ≥ 1 mm.

3. The heat exchange assembly according to claim 1, characterized in that, The angle between the line connecting the two ends of the first lumen (12) and the horizontal plane is α1, 0.8°≤α1≤2°; and / or The angle between the connection at both ends of the second cavity (22) and the horizontal plane is α2, 0.8°≤α2≤2°.

4. The heat exchange assembly according to claim 1, characterized in that, The first heat pipe (1) and the connector (3) are two independent components; or, a first flow channel is formed on the first region (31), and a second flow channel is formed on the second region (32), the first flow channel and the second flow channel are connected to form the first cavity (12) of the first heat pipe (1); and / or The second heat pipe (2) and the connector (3) are two independent components connected together; or, a third flow channel is formed on the first region (31) and a fourth flow channel is formed on the second region (32), and the third flow channel and the fourth flow channel are connected to form the second cavity (22) of the second heat pipe (2).

5. The heat exchange assembly according to claim 1, characterized in that, The connector further includes a third region (33) disposed between the first region (31) and the second region (32); and The first tube body (11) further includes a first heat-insulating section (113) disposed in the third region (33), the first heat-insulating section (113) being disposed between the first connecting section (111) and the heat dissipation section (112); and / or The second tube (21) also includes a second heat insulation section (213) disposed in the third region (33), the second heat insulation section (213) being disposed between the second connecting section (211) and the heating section (212).

6. The heat exchange assembly according to claim 5, characterized in that, The height of the first cavity (12) at the first insulation section (113) gradually increases from the first region (31) to the second region (32), and the height of the highest point of the first cavity at the first insulation section (113) is less than or equal to the height of the lowest point of the first cavity at the heat dissipation section (112), and the height of the lowest point of the first cavity at the first insulation section (113) is greater than or equal to the height of the highest point of the first cavity at the first connecting section (111). The height of the second cavity (22) in the second insulation section (213) gradually decreases from the first region (31) to the second region (32), and the height of the highest point of the second cavity in the second insulation section (213) is less than or equal to the height of the lowest point of the second cavity in the second connecting section (211), and the height of the lowest point of the second cavity in the second insulation section (213) is greater than or equal to the height of the highest point of the second cavity in the heating section (212).

7. The heat exchange assembly according to claim 1, characterized in that, The heat exchange assembly further includes a heat sink (4), which is disposed on the second region (32) corresponding to the heat dissipation section (112); and / or The heat exchange assembly further includes a heating element (5), which is disposed on the second region (32) corresponding to the heating section (212).

8. The heat exchange assembly according to claim 1, characterized in that, The actual filling amount of the phase change working fluid is M1, where M0≤M1≤1.1M0; M0 is obtained through the following formula: Where M0 is the theoretical filling amount of the phase change working fluid, and V v Where A is the steam volume, ε is the porosity, and A is the volume of steam. w Let A be the cross-sectional area of ​​the tube. v ρ is the cross-sectional area of ​​the tube. l Let ρ be the density of the liquid working fluid. v The density is the density of the gaseous working fluid.

9. The heat exchange assembly according to claim 1, characterized in that, The first heat pipe (1) and the second heat pipe (2) are arranged in the same row, and multiple first heat pipes (1) and multiple second heat pipes (2) are arranged alternately along the length or width direction of the connector (3); or The first heat pipe (1) and the second heat pipe (2) are arranged at intervals along the thickness direction of the connector (3), and a plurality of first heat pipes (1) are arranged at intervals along the length or width direction of the connector (3), and a plurality of second heat pipes (2) are arranged at intervals along the length or width direction of the connector (3).

10. A battery, characterized in that, The battery includes a battery module (6) and a heat exchange component as described in any one of claims 1-9, wherein the portion of the heat exchange component corresponding to the first region (31) is disposed on the battery module (6).

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