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 sets the lowest point of first pipe cavity in first connecting section, sets the highest point in heat dissipation section, makes the working medium liquefied in heat dissipation section can be driven by capillary force and gravity cooperation when backflow, significantly reduces backflow resistance, improves heat dissipation efficiency, correspondingly, sets the lowest point of second pipe cavity in heating section and sets the highest point in second connecting section, makes the working medium liquefied after second connecting section can also be under the action of double driving force high -efficient backflow, to realize heating function, and further makes the heat exchange subassembly have efficient heat dissipation and heating capacity, can satisfy the different thermal management demand of 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, characterized in that the heat exchange assembly comprises:

[0005] Connectors;

[0006] A first heat pipe filled with a first phase change working fluid is disposed on the connector and 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 and a heat dissipation section, the lowest point of the first cavity is located at the first connecting section, and the highest point of the first cavity is located at the heat dissipation section.

[0007] A second heat pipe filled with a second phase change working fluid is disposed on the connector. The second heat pipe 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 and a heating section. The highest point of the second cavity is located in the second connecting section, and the lowest point of the first cavity is located in the heating section.

[0008] In the preferred embodiment of the heat exchange component described above, the height difference between the highest and lowest points of the first cavity is ΔH1, where ΔH1 ≥ 1 mm; and / or

[0009] The height difference between the highest and lowest points of the second cavity is ΔH2, where ΔH2 ≥ 1 mm.

[0010] In the preferred embodiment of the above heat exchange component, the height of the lowest point of the first cavity at the heat dissipation section is greater than or equal to the height of the highest point of the first cavity at the first connecting section; and / or

[0011] The height of the highest point of the second cavity in the heating section is less than or equal to the height of the lowest point of the second cavity in the second connecting section.

[0012] In the preferred embodiment of the above heat exchange component, the first tube further includes a first insulation section, which is disposed between the first connecting section and the heat dissipation section; and / or

[0013] The second tube also includes a second insulation section, which is disposed between the second connecting section and the heating section.

[0014] In the preferred embodiment of the above heat exchange component, 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.

[0015] 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.

[0016] In the preferred embodiment of the above heat exchange component, the angle between the line connecting the end of the first cavity away from the heat dissipation section at the first connecting section and the highest point of the first cavity and the horizontal plane is α1, where 0.8°≤α1≤2°; and / or

[0017] The angle between the line connecting the end of the second cavity away from the heating section at the second connecting section and the lowest point of the second cavity and the horizontal plane is α2, where 0.8°≤α2≤2°.

[0018] In the preferred embodiment of the above heat exchange assembly, the heat exchange assembly further includes a heat dissipation component, which is disposed on the outer wall of the heat dissipation section; and / or

[0019] The heat exchange assembly also includes a heating element, which is disposed on the outer wall of the heating section.

[0020] 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;

[0021] M0 is obtained through the following formula:

[0022]

[0023] 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.

[0024] In the preferred embodiment of the above heat exchange assembly, the connecting member includes a first plate and a second and a third plate connected to the first plate; and

[0025] The first connecting segment and the second connecting segment are disposed on the first plate; the heat dissipation segment is disposed on the second plate; and the heating segment is disposed on the third plate.

[0026] In the preferred embodiment of the above heat exchange component, the first plate body deviates from the extending direction of the second plate body; and

[0027] The first heat pipe and the connector are two independent components; or, a first flow channel is formed on the first plate, and a second flow channel is formed on the second plate, the first flow channel and the second flow channel communicating to form the first cavity of the first heat pipe; and / or

[0028] The first plate body deviates from the extending direction of the third plate body; and

[0029] The second heat pipe and the connector are two independent components; or, a third flow channel is formed on the first plate and a fourth flow channel is formed on the third plate, and the third flow channel and the fourth flow channel are connected to form the second cavity of the second heat pipe.

[0030] In the preferred embodiment of the above heat exchange component, the first plate extends along the direction of the second plate; a first flow channel is formed on the first plate, and a second flow channel is formed on the second plate; the first flow channel and the second flow channel communicate to form the second cavity of the second heat pipe; and / or

[0031] The first plate has a third flow channel formed on it in the extension direction of the third plate, and the third plate has a fourth flow channel formed on it. The third flow channel and the fourth flow channel are connected to form the second cavity of the second heat pipe.

[0032] This application also provides a battery, characterized in that the battery includes the heat exchange component described in any of the above preferred technical solutions.

[0033] Those skilled in the art will understand that the heat exchange assembly of this application, by placing the lowest point of the first cavity in the first connecting section and the highest point in the heat dissipation section, 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 placing the lowest point of the second cavity in the heating section and the highest point in the second connecting section, 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, the heat exchange assembly has both efficient heat dissipation and heating capabilities, which can meet the different thermal management needs of the battery.

[0034] Furthermore, by setting the height difference between the highest and lowest points of the first cavity to be greater than or equal to 1 mm, the heat dissipation section is positioned at a relatively high level. This allows the liquefied working fluid in the heat dissipation section to be simultaneously driven by capillary force and gravity during the reflux process, effectively reducing the reflux resistance of the working fluid and improving heat dissipation performance. In addition, by setting the height difference between the highest and lowest points of the second cavity to be greater than or equal to 1 mm, the second connecting section is positioned at a relatively high level. This allows the liquefied working fluid in the second connecting section to be simultaneously driven by capillary force and gravity during the reflux process, effectively reducing the reflux resistance of the working fluid and improving heating performance.

[0035] Furthermore, by ensuring that the highest point of the first cavity at the first connecting section is less than or equal to the lowest point of the first cavity at the heat dissipation section, the backflow resistance of the liquid working fluid is avoided due to excessively high local positions in the first connecting section. Additionally, by ensuring that the lowest point of the second cavity at the second connecting section is greater than or equal to the highest point of the second cavity at the heating section, the backflow resistance of the liquid working fluid is avoided due to excessively high local positions in the heating section.

[0036] Furthermore, by 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 by 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 in the first connecting section and the first insulation section. In addition, by 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 by 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 also avoided due to excessively high local positions in the heating section and the second insulation section.

[0037] Furthermore, by incorporating heat dissipation components in the heat dissipation section, the heat dissipation area and capacity of the 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 incorporating heating components in the heating section, the heating area and heating capacity can be increased, thereby improving the vaporization rate of the working fluid and thus enhancing the battery's heating performance.

[0038] Furthermore, by limiting the amount of phase change working fluid filling the tube cavity, we can ensure the high heat exchange capacity of the heat pipe on the one hand, and effectively avoid the occurrence of drying or flooding of the first and second heat pipes on the other hand.

[0039] Furthermore, by setting the first heat pipe and the connector as two independent components when the first plate deviates from the extension direction of the second plate, or by forming a first flow channel on the first plate and a second flow channel on the second plate, with the first and second flow channels connected to form the first cavity of the first heat pipe, the lowest point of the first cavity can be located at the first connecting section and the highest point at the heat dissipation section, 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 when the first plate deviates from the extension direction of the third plate, or by forming a third flow channel on the first plate and a fourth flow channel on the third plate, with the third and fourth flow channels connected to form the second cavity of the second heat pipe, the lowest point of the second cavity can be located at the heating section and the highest point at the second connecting section, thereby effectively reducing the backflow resistance of the liquid working fluid and improving the heating capacity of the second heat pipe. Attached Figure Description

[0040] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0041] Figure 1 This is a structural diagram of the battery in this application;

[0042] Figure 2 This is a structural diagram of the first embodiment of the heat exchange component of this application;

[0043] Figure 3 This is a cross-sectional view of a second embodiment of the heat exchange component of this application;

[0044] Figure 4 This is a front view of the third embodiment of the heat exchange component of this application;

[0045] Figure 5 This is a rear view of the third embodiment of the heat exchange component of this application.

[0046] The attached figures are labeled as follows:

[0047] 1. First heat pipe; 11. First pipe body; 111. First connecting section; 112. Heat dissipation section; 113. First insulation section; 2. Second heat pipe; 21. Second pipe body; 211. Second connecting section; 212. Heating section; 213. Second insulation section; 3. Connector; 31. First plate; 32. Second plate; 33. Third plate; 34. Fourth plate; 35. Fifth plate; 4. Heat dissipation component; 5. Heating component; 6. Battery module. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] like Figure 1-5 The battery of this application is described as shown.

[0052] See Figure 1-3The battery includes a heat exchange assembly and a 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 includes a first plate 31, a second plate 32, a third plate 33, a fourth plate 34, and a fifth plate 35. The first plate 31 is located at the bottom of the battery module 6, and the second, third, fourth, and fifth plates 32 and 33 extend outside the battery module 6. The first plate 31 extends along a first direction, while the second, third, and third plates 33 extend in opposite directions along a second direction, with the first plate 31 perpendicular to both the second and third plates 33. The fourth plate 34 serves as a transition section between the first and second plates 31 and 32, connecting them, and the first, second, and fourth plates 31 and 34 do not extend collinearly. The fifth plate 35 is a transition section between the first plate 31 and the third plate 33, used to connect the first plate 31 and the third plate 33, and the first plate 31, the third plate 33 and the fifth plate 35 do not extend collinearly.

[0053] In the exemplary embodiments, the location of the first plate 31 is not fixed and can be adjusted by those skilled in the art according to the setting requirements. For example, the first plate 31 can also be located on the side wall of the battery module 6, in which case the second plate 32, the third plate 33, the fourth plate 34, and the fifth plate 35 also extend outside the battery module 6. In this case, the first plate 31, the second plate 32, the third plate 33, the fourth plate 34, and the fifth plate 35 extend collinearly with each other, as shown in the example. Figure 4 and Figure 5 As shown.

[0054] In the exemplary embodiment, the provision of the fourth plate 34 and / or the fifth plate 35 is not mandatory, and those skilled in the art can select them according to the provision requirements. Without the fourth plate 34, the first plate 31 and the second plate 32 are connected; without the fifth plate 35, the first plate 31 and the third plate 33 are connected.

[0055] See next Figure 1-2The first heat pipe 1 serves to dissipate heat for the battery module 6, and it and the connector 3 are two independent components. The first heat pipe 1 includes a first pipe body 11 and a first capillary structure. The first pipe body 11 has a first cavity closed at both ends, and the first capillary structure is provided on the inner wall of the first cavity. 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 heat insulation section 113, and a heat dissipation section 112. The first connecting section 111 is disposed on the first plate 31, the first heat insulation section 113 is disposed on the fourth plate 34, and the heat dissipation section 112 is disposed on the second plate 32. The first heat insulation section 113 connects the first connecting section 111 and the heat dissipation section 112. 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.

[0056] In the exemplary embodiments, the specific structure of the heat exchange component is not fixed in this application, and those skilled in the art can make adjustments as needed. For example, the first heat pipe 1 can also be integrated into the connector 3. Specifically, as shown in Figure 3, a first flow channel is formed on the first plate 31, a second flow channel is formed on the second plate 32, and a fifth flow channel is formed on the fourth plate 34, which is connected to the first flow channel and the second flow channel respectively. The inner walls of the first flow channel, the fifth flow channel, and the second flow channel are all provided with a first capillary structure. The first flow channel is equivalent to the first cavity at the first connecting section 111, the second flow channel is equivalent to the first cavity at the heat dissipation section 112, and the fifth flow channel is relative to the first cavity at the first insulation section 113. Thus, the flow channel formed by the connection of the first flow channel, the fifth flow channel, and the second flow channel is the first cavity of the first heat pipe 1, and the first cavity is filled with a first phase change working fluid.

[0057] 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.

[0058] In an exemplary embodiment, the first heat insulation section 113 is not necessary if the fourth plate 34 is not provided. Without the first heat insulation section 113, the first connecting section 111 is directly connected to the heat dissipation section 112.

[0059] See next Figure 1-3The first cavity at the first connecting section 111 extends along the first direction, ensuring a constant height of the first cavity at the first connecting section 111 in the second direction. The first insulating section 113 serves as a transition section connecting the first connecting section 111 and the heat dissipation section 112, and the lowest point of its first cavity in the second direction is greater than or equal to the highest point of the first cavity at the first connecting section 111 in the second direction. The first cavities at the heat dissipation section 112 extend along the second direction. Through this arrangement, the lowest point of the entire first cavity in the second direction is located at the first connecting section 111, the highest point of the first cavity in the second direction is located at the heat dissipation section 112, and the highest points of the first cavity at the first connecting section 111 and the first insulating section 113 in the second direction are all less than or equal to the lowest point of the first cavity at the heat dissipation section 112 in the second direction. The height difference between the highest and lowest points of the entire first cavity in the second direction is ΔH1, where ΔH1 ≥ 1 mm. The angle between the line connecting the end of the first cavity away from the heat dissipation section 112 at the first connecting section 111 and the highest point of the first cavity at the heat dissipation section 112, and the extension direction of the first connecting section 111, is α1, where 0.8° ≤ α1 ≤ 2°. This arrangement 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 insulating 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.

[0060] It should be noted that the first direction refers to, for example, Figure 1-3 The X direction shown includes both the positive and negative directions indicated by the arrow. The second direction refers to... Figure 1-3 The Z-direction shown includes both 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 1-3 The relative height position is shown along the Z-direction arrow. Since the first connecting segment 111 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, the extension direction of the first connecting segment 111 can be regarded as the horizontal plane. 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.

[0061] In an exemplary embodiment, the first cavity at the first connecting section 111 can also be gradually arranged in the second direction. That is, the height of the first cavity at the first connecting section 111 in the second direction gradually increases from the end of the first connecting section 111 away from the heat dissipation section 112 towards the heat dissipation section 112. At the same time, it is ensured that the highest point of the first cavity at the first connecting section 111 in the second direction is less than or equal to the lowest point of the first cavity at the heat dissipation section 112 in the second direction and the lowest point of the first cavity at the first insulation section 113 in the second direction. This arrangement also helps to reduce the flow resistance of the liquid working fluid.

[0062] See next Figure 1-3 There are multiple first heat pipes 1, which are arranged at intervals along a third direction on the connector 3. Since the second plate 32 and the fourth plate 34 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, realizing the cyclic phase change heat transfer of the working fluid.

[0063] It should be noted that "third-party" refers to, for example... Figure 1-2 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.

[0064] 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 disposed on the connector 3. For example, the first heat pipe 1 can be pasted onto the connector 3.

[0065] 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 plate 31 is disposed at the bottom of the battery module 6, the multiple first heat pipes 1 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 plate 31 is disposed on the side wall of the battery module 6, the first plate 31, the second plate 32, the third plate 33, the fourth plate 34, and the fifth plate 35 extend collinearly, and the connector 3 has a straight plate structure, with the multiple first heat pipes 1 spaced apart on the connector 3 along a second direction, such as... Figure 4 As shown, the second direction may be the length or width direction of the connector 3, depending on the specific side wall position of the battery module 6.

[0066] See next Figure 1-2 The second heat pipe 2 heats the battery module 6. The second heat pipe 2 and the connector 3 are independent components. The second heat pipe 2 includes a second pipe body 21 and a second capillary structure. The second pipe body 21 has a second cavity closed at both ends. The inner wall of the second cavity is provided with the second capillary structure, and the second cavity 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. The second connecting section 211 is located on the first plate 31, the second insulating section 213 is located on the fifth plate 35, and the heating section 212 is located on the third plate 33. The second insulating section 213 connects the second connecting section 211 and the heating section 212. 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.

[0067] In the exemplary embodiments, the specific structure of the heat exchange component is not fixed in this application, and those skilled in the art can adjust it as needed. For example, the second heat pipe 2 can also be integrated into the connector 3, specifically, as shown below. Figure 3 As shown, a third flow channel is formed on the first plate 31, a fourth flow channel is formed on the third plate 33, and a sixth flow channel is provided in the fifth plate 35, which is connected to the third and fourth flow channels respectively. The inner walls of the third, fourth and sixth flow channels are all provided with second capillary structures. The third flow channel is equivalent to the second cavity at the second connecting section 211, the fourth flow channel is equivalent to the second cavity at the heating section 212, and the sixth flow channel is relative to the second cavity at the second insulation section 213. Thus, the flow channel formed by the connection of the third, fourth and sixth flow channels is the second cavity of the second heat pipe 2, and the second cavity is filled with the second phase change working fluid. Wherein, when the first plate 31, the second plate 32 and the fourth plate 34 do not extend collinearly, the first plate 31, the third plate 33 and the fifth plate 35 do not extend collinearly, and the first flow channel and the third flow channel are formed on the first plate 31 at the same time, the first flow channel and the third flow channel are arranged at intervals along the thickness direction of the first plate 31, or they can be arranged alternately in the same row.

[0068] 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.

[0069] In an exemplary embodiment, the second insulation section 213 is not necessary if the fifth connecting plate is not provided. Without the second insulation section 213, the second connecting section 211 is directly connected to the heating section 212.

[0070] See next Figure 1-3 The second lumens at the second connecting section 211 all extend along the first direction, ensuring that the height of the second lumens at the second connecting section 211 remains constant in the second direction. The second insulating section 213 is a transition section connecting the second connecting section 211 and the heating section 212, and the highest point of its second lumen in the second direction is less than or equal to the lowest point of the second lumen at the heating section 212 in the second direction. The second lumens at the heating section 212 all extend along the second direction, and the direction of extension is opposite to the direction of extension of the first lumen at the heat dissipation section 112. Through the above arrangement, the lowest point of the entire second lumen in the second direction is located at the heating section 212, the highest point of the second lumen in the second direction is located at the second connecting section 211, and the highest points of the second lumens in the second direction at the heating section 212 and the second insulating section 213 are all less than or equal to the lowest point of the second lumen in the second connecting section 211 in the second direction. The height difference between the highest and lowest points of the entire second cavity in the second direction is ΔH2, where ΔH2 ≥ 1 mm. The angle between the line connecting the end of the second cavity at the second connecting section 211 away from the heating section 212 and the lowest point of the second cavity at the heating section 212, and the extension direction of the second connecting section 211, is α2, where 0.8° ≤ α2 ≤ 2°. This arrangement avoids increased backflow resistance of the liquid working fluid due to excessively high local positions of the heating section 212 and the second insulating section 213. It ensures that the second connecting section 211 is positioned relatively high, allowing the liquid working fluid to be simultaneously driven by capillary force and gravity during backflow, effectively reducing flow resistance.

[0071] It should be noted that since the second connecting segment 211 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, the extension direction of the second connecting segment 211 can be regarded as the horizontal plane.

[0072] In an exemplary embodiment, the second cavity at the second connecting section 211 can also be gradually arranged in the second direction. That is, the height of the second cavity at the second connecting section 211 in the second direction gradually decreases from the end of the second connecting section 211 away from the heat dissipation section 112 towards the heating section 212. At the same time, it is ensured that the lowest point of the second cavity at the second connecting section 211 in the second direction is greater than or equal to the highest point of the second cavity at the heating section 212 in the second direction and the highest point of the second cavity at the second insulation section 213 in the second direction. This arrangement also helps to reduce the flow resistance of the liquid working fluid.

[0073] See next Figure 2-3 Multiple second heat pipes 2 are arranged at intervals along a third direction on the connector 3. The multiple second heat pipes 2 and multiple first heat pipes 1 are each considered as independent groups, with the first and second connecting sections of these two groups respectively located on both sides of the first plate in the second direction. Since the third plate 33 and the fifth plate 35 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. This allows the working fluid in the heating section 212 to absorb heat and vaporize when the battery module 6 needs heating. 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, thereby achieving heating of the battery module 6.

[0074] 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.

[0075] In the 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 second connecting segments 211 of the multiple second heat pipes 2 are all disposed at the bottom of the battery module 6, and the second connecting segment 211 in each second heat pipe 2 extends along a third direction, the multiple second heat pipes 2 are spaced apart 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 second connecting segment 211 is disposed on the side wall of the battery module 6, the first plate 31, the second plate 32, the third plate 33, the fourth plate 34, and the fifth plate 35 extend collinearly, and the connector 3 has a straight plate structure. The multiple second heat pipes 2 are spaced apart on the connector 3 along a second direction, specifically as follows: Figure 5 As shown, the second direction may be the length or width direction of the connector 3, depending on the specific side wall position of the battery module 6.

[0076] In an exemplary embodiment, when the first plate 31 is disposed on the side wall of the battery module 6, the first plate 31, the second plate 32, the third plate 33, the fourth plate 34, and the fifth plate 35 extend collinearly. That is, the connector 3 formed by the first plate 31, the second plate 32, the third plate 33, the fourth plate 34, and the fifth plate 35 is a straight plate structure. The first cavity formed by the communication of the first flow channel, the second flow channel, and the fifth flow channel, and the second cavity formed by the communication of the third flow channel, the fourth flow channel, and the sixth flow channel are spaced apart along the thickness direction of the connector 3.

[0077] See next Figure 1The battery also includes a heat sink 4 and a heating element 5. The heat sink 4 is disposed on the second plate 32 and can accelerate the condensation rate of the first phase change working fluid in the heat dissipation section 112, thereby improving the heat dissipation performance of the battery. The heating element 5 is disposed on the third plate 33 and can heat the second phase change working fluid in the heating section 212, causing the second phase change working fluid in the heating section 212 to liquefy and enter the second connecting section 211 through the second insulation section 213, thereby achieving the heating of 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 in the following way: the actual filling amount of the phase change working fluid is M1, M0≤M1≤1.1M0, where M0 is obtained by the following formula:

[0078]

[0079] 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.

[0080] It should be noted that the theoretical filling quantity M0 is in kg. Steam volume V v 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 .

[0081] 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 annular cross-sectional area can be calculated accordingly. When both sides of the connector are in contact with the battery module respectively and the first connecting segment and the second connecting segment are spaced apart along the thickness direction of the connector, the annular cross-sectional thickness of any heat pipe flow channel is defined as the average vertical distance between the inner wall of the flow channel and the side of the adjacent connector in the thickness direction. The annular cross-sectional area of ​​the flow channel can be calculated based on this thickness parameter.

[0082] In exemplary embodiments, the types of arrangements for the heat sink 4 and the heating element 5 are not limited, as long as they facilitate the heat dissipation of the first phase change working fluid within the heat dissipation section 112 and the heating of the second phase change working fluid within the heating section 212. For example, the heat sink 4 can also be provided with heat dissipation sections of multiple first heat pipes to achieve the same heat dissipation purpose. The heat sink can be a fin, a liquid guide tube, or a cooling plate. And / or, the heating element 5 can also be provided with heating sections of multiple second heat pipes to achieve the same heating purpose. The heating element can be a heating plate. It should be noted that when the first plate 31 is set on the side wall of the battery module 6, the first plate 31, the second plate 32, the third plate 33, the fourth plate 34 and the fifth plate 35 extend collinearly, and the first cavity formed by the first flow channel, the second flow channel and the fifth flow channel are connected, and the second cavity formed by the third flow channel, the fourth flow channel and the sixth flow channel are connected and spaced apart along the thickness direction of the connector 3. Heating element 5 and heat dissipation element 4 can be set on both sides of the thickness direction of the connector 3 respectively. When heat dissipation of the battery module is required, the heat dissipation element 4 works and the heating element 5 does not work; when heat dissipation of the battery module 6 is required, the heating element 5 works and the heat dissipation element 4 does not work.

[0083] 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.

[0084] 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: Connector (3); A first heat pipe (1) filled with a first phase change working fluid is disposed on the connector (3). The first heat pipe (1) includes a first tube body (11) having a first cavity and a first capillary structure disposed on the inner wall of the first cavity. The first heat pipe (1) includes a first connecting section (111) and a heat dissipation section (112). The lowest point of the first cavity is located at the first connecting section (111), and the highest point of the first cavity is located at the heat dissipation section (112). A second heat pipe (2) filled with a second phase change working fluid is disposed on the connector (3). The second heat pipe (2) includes a second tube body (21) having a second cavity and a second capillary structure disposed on the inner wall of the second cavity. The second heat pipe (2) includes a second connecting section (211) and a heating section (212). The highest point of the second cavity is located in the second connecting section (211), and the lowest point of the first cavity is located in the heating section (212).

2. The heat exchange assembly according to claim 1, characterized in that, The height difference between the highest and lowest points of the first cavity is ΔH1, where ΔH1 ≥ 1 mm; and / or The height difference between the highest and lowest points of the second cavity is ΔH2, where ΔH2 ≥ 1 mm.

3. The heat exchange assembly according to claim 1 or 2, characterized in that, The lowest point of the first cavity in the heat dissipation section (112) is at a height greater than or equal to the highest point of the first cavity in the first connecting section (111); and / or The height of the highest point of the second cavity in the heating section (212) is less than or equal to the height of the lowest point of the second cavity in the second connecting section (211).

4. The heat exchange assembly according to claim 1 or 2, characterized in that, The first tube body (11) further includes a first heat insulation section (113), which is disposed between the first connecting section (111) and the heat dissipation section (112); and / or The second tube (21) also includes a second insulation section (213), which is disposed between the second connecting section (211) and the heating section (212).

5. The heat exchange assembly according to claim 4, characterized in that, The height of the highest point of the first cavity in the first insulation section (113) is less than or equal to the height of the lowest point of the first cavity in the heat dissipation section (112), and the height of the lowest point of the first cavity in the first insulation section (113) is greater than or equal to the height of the highest point of the first cavity in the first connecting section (111). 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).

6. The heat exchange assembly according to claim 1 or 2, characterized in that, The angle between the line connecting the end of the first cavity at the first connecting section (111) away from the heat dissipation section (112) and the highest point of the first cavity and the horizontal plane is α1, where 0.8°≤α1≤2°; and / or The angle between the line connecting the end of the second cavity at the second connecting section (211) away from the heating section (212) and the lowest point of the second cavity and the horizontal plane is α2, where 0.8°≤α2≤2°.

7. The heat exchange assembly according to claim 1 or 2, characterized in that, The heat exchange assembly further includes a heat sink (4), which is disposed on the outer wall of the heat dissipation section (112); and / or The heat exchange assembly also includes a heating element (5), which is disposed on the outer wall of the heating section (212).

8. The heat exchange assembly according to claim 1 or 2, characterized in that, The actual filling amount of the phase change working fluid is M1, where M0≤M1≤1.1M; 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 or the present invention, characterized in that, The connector (3) includes a first plate (31) and a second plate (32) and a third plate (33) connected to the first plate (31); and The first connecting segment (111) and the second connecting segment (211) are disposed on the first plate (31); the heat dissipation segment (112) is disposed on the second plate (32); and the heating segment (212) is disposed on the third plate (33).

10. The heat exchange assembly according to claim 9, characterized in that, The first plate (31) deviates from the extending direction of the second plate (32); and The first heat pipe (1) and the connector (3) are two independent components; or, a first flow channel is formed on the first plate (31) and a second flow channel is formed on the second plate (32), and the first flow channel and the second flow channel are connected to form the first cavity of the first heat pipe (1); And / or The first plate (31) deviates from the extending direction of the third plate (33); and The second heat pipe (2) and the connector (3) are two independent components; or, a third flow channel is formed on the first plate (31) and a fourth flow channel is formed on the third plate (33), and the third flow channel and the fourth flow channel are connected to form the second cavity of the second heat pipe (2).

11. The heat exchange assembly according to claim 9, characterized in that, The first plate (31) extends along the direction of the second plate (32); a first flow channel is formed on the first plate (31), and a second flow channel is formed on the second plate (32); the first flow channel and the second flow channel communicate to form the second cavity of the second heat pipe (2); and / or The first plate (31) extends in the direction of the third plate (33), a third flow channel is formed on the first plate (31), and a fourth flow channel is formed on the third plate (33). The third flow channel and the fourth flow channel are connected to form the second cavity of the second heat pipe (2).

12. A battery, characterized in that, The battery includes the heat exchange assembly as described in any one of claims 1-11.

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