Battery heat exchange device

Abstract

Embodiments of the present application relate to a battery heat exchange device, comprising a first header, a first interface, a second header, a first heat exchange tube, and at least one second heat exchange tube, wherein a first sub-tube is separated from a second sub-tube; the first header comprises the first sub-tube and at least one second sub-tube; the first interface is communicated with a tube cavity of the first sub-tube; the width direction of the first heat exchange tube and the width direction of the second heat exchange tube extend in a first direction, the first heat exchange tube is communicated with the first sub-tube and the second header, and the second heat exchange tube is communicated with the second sub-tube and the second header; the second heat exchange tube comprises N first channels, N>3, and in the first direction, it is defined that the first one among the first channels is a first sub-channel and the Nth one among the first channels is an Nth sub-channel, wherein an Mth sub-channel is arranged between the first sub-channel and the Nth sub-channel, the flow cross-sectional area of the first sub-channel is larger than that of the Mth sub-channel, and the flow cross-sectional area of the Mth sub-channel is larger than that of the Nth sub-channel. The battery heat exchange device can enhance the battery heat exchange effect.

Description

Battery heat exchange device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority and benefits of the Chinese patent application with application number 202323526213.1 and application date December 22, 2023. The entire contents of the above Chinese patent application are hereby incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of battery heat exchange, and in particular to a battery heat exchange device. Background Art

[0004] With the development of battery technology, battery power is increasing, and the energy density carried by batteries is also increasing. Therefore, the heat exchange requirements of batteries during operation are also increasing, and higher requirements are placed on the heat exchange performance of battery heat exchange devices. In the related art, heat exchange devices for battery heat exchange have the problem of uneven refrigerant distribution. In particular, after the refrigerant flows through the first heat exchange tube into the manifold, and then enters the second heat exchange tube through the distribution of the manifold, the refrigerant flow inertia along the length of the manifold will cause the refrigerant flow on one side of the second heat exchange tube to be large, and the refrigerant flow on the other side to be small. The uneven distribution of refrigerant entering the heat exchange tube will cause the surface temperature distribution of the heat exchange tube to deteriorate, affecting the heat exchange effect of the battery heat exchange device on the battery.

[0005] Summary of the Invention

[0006] An embodiment of the present application provides a battery heat exchange device, which can improve the heat exchange effect on the battery.

[0007] The battery heat exchange device provided in an embodiment of the present application specifically includes:

[0008] a first header, the first header comprising a first sub-tube and at least one second sub-tube, the first sub-tube being separated from the second sub-tube, and the first sub-tube and the second sub-tube being arranged along a length direction of the first header;

[0009] a first interface, the first interface being provided on the first sub-tube and communicating with the lumen of the first sub-tube;

[0010] a second header, the second header being spaced apart from the first header;

[0011] a first heat exchange tube, wherein the width direction of the first heat exchange tube extends along a first direction, and the first heat exchange tube is connected to the first sub-tube and the second header;

[0012] At least one second heat exchange tube, the width direction of the second heat exchange tube extends along the first direction, the second heat exchange tube connects the second sub-tube and the second header; the second heat exchange tube includes N first channels, N>3, the N first channels are arranged at intervals along the width direction of the second heat exchange tube, along the first direction, the first first channel is defined as a first sub-channel, the Nth first channel is defined as an Nth sub-channel, there is an Mth sub-channel between the first sub-channel and the Nth sub-channel, the flow cross-sectional area of ​​the first sub-channel is greater than the flow cross-sectional area of ​​the Mth sub-channel, and the flow cross-sectional area of ​​the Mth sub-channel is greater than the flow cross-sectional area of ​​the Nth sub-channel.

[0013] The beneficial effects of the embodiments of the present application are:

[0014] The battery heat exchange device provided in the embodiment of the present application uses first channels of different sizes to distribute the refrigerant starting from the second heat exchange tube (i.e., the second heat exchange tube) where the refrigerant circulates. In the process of the refrigerant entering the second heat exchange tube, due to flow inertia, it will gather more at the Nth sub-channel and less at the first sub-channel. Therefore, when the flow cross-sectional area of ​​the Nth sub-channel is the smallest, the flow cross-sectional area of ​​the first sub-channel is the largest, and the flow cross-sectional area of ​​the Mth sub-channel is between the two, the amount of refrigerant entering the Nth sub-channel can be reduced, so that the refrigerant flows in the direction of the first sub-channel and enters each first channel, making the refrigerant flow in each first channel more uniform, thereby further improving the heat exchange effect of the battery heat exchange device on the battery.

[0015] In addition, the battery heat exchange device provided in the embodiments of the present application may also have the following additional technical features:

[0016] In an optional solution, the first heat exchange tube includes a plurality of second channels, which are arranged at intervals along the width direction of the first heat exchange tube, and at least some of the plurality of second channels have the same flow cross-sectional area; the first interface is located in the middle position of the first sub-tube along the length direction.

[0017] When the battery heat exchange device is working, the refrigerant entering from the first interface flows directly into the first heat exchange tube. The first interface is located in the middle position of the first sub-tube along the length direction, which allows the refrigerant to enter each second channel more evenly. In addition, when the flow cross-sectional area of ​​at least some of the multiple second channels of the first heat exchange tube is the same, the distribution of the refrigerant is more uniform.

[0018] In an optional solution, the cross-sectional area of ​​the N first channels decreases linearly along the first direction. The linearly decreasing first channels can cause the refrigerant to flow toward the first sub-channels and enter each first channel more evenly, making the refrigerant flow rate in each first channel more similar, thereby improving the uniformity of the heat pipe surface temperature distribution.

[0019] In an optional solution, on the cross section of the second heat exchange tube, the height of the first sub-channel is defined as H1, the width of the first sub-channel is defined as W1, and the height of the Mth sub-channel is defined as H M The width of the M-th sub-channel is W M , the height of the Nth sub-channel is H N The width of the Nth subchannel is W N , then: H1=H M =H N , W1>W M >W N ; or H1>H M >H N , W1=W M =W N .

[0020] In an optional solution, at least two adjacent first channels with equal flow cross-sectional areas are defined as a channel group, and the second heat exchange tube includes at least two channel groups;

[0021] The sum of the flow cross-sectional areas of the first channels within the same channel group is defined as the flow cross-sectional area of ​​the channel group. Along the first direction, the flow cross-sectional area of ​​the channel group decreases linearly.

[0022] In an optional solution, there are multiple channel groups, and the channel group where the first subchannel is located is defined as the first channel group, the channel group where the Nth subchannel is located is defined as the Nth channel group, and the channel group where the Mth subchannel is located is defined as the Mth channel group;

[0023] The height of the first sub-channel is H1', ​​the width of the first sub-channel is W1', the height of the Mth sub-channel is H M ', the width of the Mth sub-channel is W M ', the height of the Nth sub-channel is H N ', the width of the Nth sub-channel is W N ', then: H1'=H M '=H N ', W1'>W M '>W N '.

[0024] In an optional solution, the flow cross-sectional area of ​​the first sub-channel is defined as S1, and the flow cross-sectional area of ​​the Nth sub-channel is defined as S N The flow cross-sectional area of ​​the Mth sub-channel is S M , then: 1 / 4S1≤S N <S M .

[0025] In an optional solution, the number of the second heat exchange tubes is at least two, and at least two of the second heat exchange tubes are arranged at intervals along the first direction;

[0026] The battery heat exchange device further includes a first plate, which is at least partially located in the tube cavity of the second header, and the first plate is capable of blocking the tube cavity of the second header.

[0027] In an optional solution, the battery heat exchange device further includes a second plate, the second plate includes a first hole, and the first hole passes through the second plate;

[0028] The second plate is located on the second header, and the second plate is spaced apart from the first plate, and / or the second plate is located on at least part of the second sub-tube.

[0029] In an optional solution, the number of the first holes is one or more, and in the first direction, at least one of the first holes is inclined outward from one side of the first heat exchange tube.

[0030] The present application also provides another battery heat exchange device, including:

[0031] a first header, the first header comprising a first sub-tube and at least one second sub-tube, the first sub-tube being separated from the second sub-tube, and the first sub-tube and the second sub-tube being arranged along a length direction of the first header;

[0032] a first interface, the first interface being provided on the first sub-tube and communicating with the lumen of the first sub-tube;

[0033] a second header, the second header being spaced apart from the first header;

[0034] a first heat exchange tube, wherein the width direction of the first heat exchange tube extends along a first direction, and the first heat exchange tube is connected to the first sub-tube and the second header;

[0035] at least one second heat exchange tube, wherein the width direction of the second heat exchange tube extends along the first direction, and the second heat exchange tube communicates with the second sub-tube and the second header; the second heat exchange tube comprises a plurality of first channels, and among the plurality of first channels, a flow cross-sectional area of ​​any first channel is greater than a flow cross-sectional area of ​​another first channel along the first direction.

[0036] The battery heat exchange device in this embodiment can make the refrigerant flow toward the first sub-channel and enter each first channel, making the refrigerant flow in each first channel more uniform, thereby further improving the heat exchange effect of the battery heat exchange device on the battery.

[0037] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a schematic structural diagram of a battery heat exchange device provided in the present application in a specific embodiment;

[0039] FIG2 is a schematic structural diagram of a second heat exchange tube provided in the present application in a specific embodiment;

[0040] FIG3 is a schematic structural diagram of a first heat exchange tube provided in the present application in a specific embodiment;

[0041] FIG4 is a schematic structural diagram of the second heat exchange tube provided in the present application in another specific embodiment;

[0042] FIG5 is a schematic structural diagram of a second heat exchange tube provided in the present application in another specific embodiment;

[0043] FIG6 is a schematic structural diagram of another specific embodiment of the battery heat exchange device provided in this application;

[0044] FIG7 is a schematic structural diagram of a battery heat exchange device provided in the present application in another specific embodiment;

[0045] FIG8 is an enlarged structural diagram of point A in FIG7 .

[0046] Figure markings: first header 1, first sub-tube 11, second sub-tube 12, first interface 2, second header 3, first heat exchange tube 4, second channel 41, second heat exchange tube 5, first channel 51, first sub-channel 511, Nth sub-channel 512, Mth sub-channel 513, first channel group 514, Nth channel group 515, Mth channel group 516, first plate 6, second plate 7, first hole 71.

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0048] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0049] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0050] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0051] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0052] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0053] As shown in Figures 1-8, an embodiment of the present application provides a battery heat exchange device that can improve the heat exchange effect on the battery. The device specifically includes a first header 1, a first interface 2, a second header 3, a first heat exchange tube 4, and at least one second heat exchange tube 5. The first header 1 includes a first sub-tube 11 and at least one second sub-tube 12. The first sub-tube 11 is separated from the second sub-tube 12. The separation here means that the first sub-tube 11 and the second sub-tube 12 are not connected. The first sub-tube 11 and the second sub-tube 12 are arranged along the length direction of the first header 1. The first interface 2 is provided on the first sub-tube 11, and the first interface 2 is connected to the tube cavity of the first sub-tube 11. The second header 3 is spaced apart from the first header 1. The width direction of the first heat exchange tube 4 extends along the first direction, and the first heat exchange tube 4 is connected to the first sub-tube 11 and the second header 3. The width direction of the second heat exchange tube 5 extends along the first direction, and the second heat exchange tube 5 is connected to the second sub-tube 12 and the second header 3.

[0054] The second heat exchange tube 5 includes N first channels 51, N>3, and the N first channels 51 are arranged at intervals along the width direction of the second heat exchange tube 5. Along the first direction, the first first channel 51 is defined as the first sub-channel 511, and the Nth first channel 51 is defined as the Nth sub-channel 512. There is an Mth sub-channel 513 between the first sub-channel 511 and the Nth sub-channel 512. The flow cross-sectional area of ​​the first sub-channel 511 is greater than the flow cross-sectional area of ​​the Mth sub-channel 513, and the flow cross-sectional area of ​​the Mth sub-channel 513 is greater than the flow cross-sectional area of ​​the Nth sub-channel 512.

[0055] As shown in Figure 1, in this embodiment, the shape of the first manifold 1 is a hollow cylindrical structure, that is, a conventional manifold structure. Of course, the first manifold 1 can also be other shapes, such as a square tube or a polygonal tube. In addition, the lengths of the first sub-tube 11 and the second sub-tube 12 of the first manifold 1 can be the same or different. Specifically, it can be determined according to the number of the second heat exchange tubes 5 and the flow of the refrigerant of the entire battery heat exchange device when it is working, that is, it can be adjusted according to actual usage requirements, and this article does not make specific restrictions on this. The first interface 2 is provided on the first sub-tube 11. During the assembly process of the battery heat exchange device, an external tube will be installed to serve as the liquid inlet / outlet pipe of the battery heat exchange device. In this embodiment, the first interface 2 is used as a liquid inlet, and the refrigerant can enter the battery heat exchange device through the first interface 2 for heat exchange.

[0056] Additionally, it should be noted that the spacing between the second header 3 and the first header 1 means that there is a gap between them and they are arranged opposite each other. The gap between the second header 3 and the first header 1 is primarily for mounting the first heat exchange tube 4 and the second heat exchange tube 5. Therefore, the spacing distance is primarily determined by the lengths of the two heat exchange tubes. The second header 3 and the first header 1 can be arranged relatively parallel or at a certain angle relative to each other. This can be adjusted based on the installation environment, battery size, and other factors. This is not detailed in this article, but generally speaking, the second header 3 and the first header 1 are arranged parallel.

[0057] As shown in Figure 1, in this embodiment, the first direction refers to the direction parallel to the second header 3 and from the first heat exchange tube 4 to the second heat exchange tube 5. This direction is also the direction of the refrigerant along the second header 3. The second heat exchange tube 5 includes N first channels 51, that is, the second heat exchange tube 5 is a microchannel heat exchange tube. The N first channels 51 of the second heat exchange tube 5 can divide the refrigerant into multiple parts and enter each first channel 51, thereby increasing the contact area between the refrigerant and the second heat exchange tube 5 and improving the heat exchange efficiency. It should be noted that the specific structure of the first heat exchange tube 4 is not limited in this embodiment. Therefore, the first heat exchange tube 4 can be a microchannel heat exchange tube or a conventional single-hole heat exchange tube. The structure of the first heat exchange tube 4 will be described below.

[0058] The battery heat exchange device in this embodiment uses first channels 51 of different sizes to distribute the refrigerant starting from the second heat exchange tube (i.e., the second heat exchange tube 5) where the refrigerant circulates. In the process of the refrigerant entering the second heat exchange tube 5, due to flow inertia, it will gather more at the Nth sub-channel 512 and less at the first sub-channel 511. Therefore, when the flow cross-sectional area of ​​the Nth sub-channel 512 is the smallest, the flow cross-sectional area of ​​the first sub-channel 511 is the largest, and the flow cross-sectional area of ​​the Mth sub-channel 513 is between the two, the amount of refrigerant entering the Nth sub-channel 512 can be reduced, so that the refrigerant flows in the direction of the first sub-channel 511 and enters each first channel 51, so that the refrigerant flow in each first channel 51 is more uniform, thereby further improving the heat exchange effect of the battery heat exchange device on the battery.

[0059] As shown in Figures 1 and 3, in a specific embodiment, the first heat exchange tube 4 includes a plurality of second channels 41, which are arranged at intervals along the width direction of the first heat exchange tube 4, and at least some of the second channels 41 have the same flow cross-sectional area; the first interface 2 is located in the middle position of the first sub-tube 11 along the length direction.

[0060] In this embodiment, in order to improve the heat exchange efficiency of the first heat exchange tube 4, the first heat exchange tube 4 is also a microchannel heat exchange tube, that is, the first heat exchange tube 4 includes multiple second channels 41, but the structure of the first heat exchange tube 4 is slightly different from the structure of the second heat exchange tube 5. Specifically, as mentioned above, the first heat exchange tube 4 is the first heat exchange tube through which the refrigerant flows after entering the battery heat exchange device. The refrigerant enters the first sub-tube 11 from the first interface 2, and then enters the first heat exchange tube 4 from the first sub-tube 11. In this process, the refrigerant will not be unevenly distributed due to the flow inertia of the refrigerant. Therefore, the first heat exchange tube 4 does not need to have a similar structure to the second heat exchange tube 5, that is, a conventional microchannel heat exchange tube can be used.

[0061] In addition, when the first heat exchange tube 4 is also a microchannel heat exchange tube, the flow cross-sectional areas of most of the second channels 41 in the first heat exchange tube 4 are the same. At this time, when the first interface 2 is located in the middle position of the first sub-tube 11 along the length direction, the refrigerant can enter the various second channels 41 of the first sub-tube 11 more evenly from the first interface 2, so that the distribution of the refrigerant is more uniform, thereby improving the heat exchange effect of the first heat exchange tube 4. After heat exchange in the first heat exchange tube 4, the refrigerant flows into the second header 3, and then flows into the second heat exchange tube 5 for heat exchange.

[0062] As shown in Figures 1 and 4, in a specific embodiment, the flow cross-sectional area of ​​the N first channels 51 decreases linearly along the first direction. As mentioned above, the flow inertia of the refrigerant along the first direction will cause its distribution into the second heat exchange tube 5 to be uneven. Therefore, the N first channels 51 that decrease linearly along the first direction can strengthen the process of reducing the amount of refrigerant entering the Nth sub-channel 512, and the refrigerant flowing in the direction of the first sub-channel 511 and entering each first channel 51, so that the refrigerant flow in each first channel 51 is more uniform. In addition, the linearly decreasing first channel 51 can make the refrigerant flow in the direction of the first sub-channel 511 and enter each first channel 51 more evenly, so that the refrigerant flow in each first channel 51 is closer, thereby improving the uniformity of the temperature distribution on the surface of the heat pipe.

[0063] As shown in FIG4 , in a specific embodiment, on the cross section of the second heat exchange tube 5 , the height of the first sub-channel 511 is defined as H1, the width of the first sub-channel 511 is defined as W1, the height of the Mth sub-channel 513 is defined as H2, and the width of the Mth sub-channel 514 is defined as W3. M The width of the M-th sub-channel 513 is W M , the height of the Nth subchannel 512 is H N The width of the Nth subchannel 512 is W N , then: H1=H M =H N , W1>W M >W N ; or H1>H M >H N , W1=W M =W N .

[0064] There are many ways to reduce the flow cross-sectional area of ​​the first channel 51. For example, the thickness of the second heat exchange tube 5 at the corresponding first channel 51 can be reduced to reduce the flow cross-sectional area of ​​the first channel 51 at this position. Internal fins of different thicknesses can also be added to each first channel 51. The embodiment of the present application adopts a method with lower production cost and more direct and effective method, that is, reducing the height and / or width of each first channel 51. For example, in the first embodiment, the height of each first channel 51 is kept unchanged, and the width of each first channel 51 is linearly reduced along the direction from the first sub-channel 511 to the Nth sub-channel 512 (i.e., the first direction), so that W1>W M >W N , thereby reducing the flow cross-sectional area of ​​each first channel 51. Alternatively, the width may be kept constant and the height of each first channel 51 may be linearly reduced along the first direction so that H1>H M >H N, thereby reducing the flow cross-sectional area of ​​each first channel 51. It should be noted that the reduction trend of the first channel 51 can be preset according to the actual distribution situation. Such a reduction trend can be obtained through a limited number of experiments, which will not be described in detail in this article.

[0065] As shown in Figures 1 and 5, in one specific embodiment, at least two adjacent first channels 51 with equal flow cross-sectional areas are defined as a channel group, and the second heat exchange tube 5 includes at least two channel groups. The sum of the flow cross-sectional areas of the first channels 51 within the same channel group is defined as the flow cross-sectional area of ​​the channel group. The flow cross-sectional area of ​​the channel group decreases linearly along a first direction. Unlike the above embodiment, the change trend of the first channels 51 in this embodiment is a step-like change, that is, at least two first channels 51 form a channel group, and the flow cross-sectional areas of multiple channel groups decrease linearly along the first direction.

[0066] As shown in FIG5 , in a specific embodiment, there are multiple channel groups. The channel group in which the first subchannel 511 is located is defined as the first channel group 514, the channel group in which the Nth subchannel 512 is located is defined as the Nth channel group 515, and the channel group in which the Mth subchannel 513 is located is defined as the Mth channel group 516. The height of the first subchannel 511 is H1′, the width of the first subchannel 511 is W1′, the height of the Mth subchannel 513 is H M ', the width of the M-th sub-channel 513 is W M ', the height of the Nth subchannel 512 is H N ', the width of the Nth sub-channel 512 is W N ', then: H1'=H M '=H N ', W1'>W M '>W N '.

[0067] Similar to the method of changing the cross-sectional area of ​​the first channels 51 in the above embodiment, the height and / or width of each first channel 51 can be reduced. However, in this embodiment, the multiple first channels 51 are changed in the form of channel groups. In order to provide a larger number of first channels 51 and / or channel groups within the second heat exchange tube 5 of limited width, the height of each first channel 51 can be kept unchanged, while only the width can be reduced. This allows the second heat exchange tube 5 to have a larger number of first channels 51 without changing the width of the second heat exchange tube 5, thereby increasing the refrigerant flow rate within the second heat exchange tube 5 and improving the heat exchange effect.

[0068] In a specific embodiment, the flow cross-sectional area of ​​the first sub-channel 511 is defined as S1, and the flow cross-sectional area of ​​the Nth sub-channel 512 is defined as S N , the flow cross-sectional area of ​​the Mth sub-channel 513 is S M, then: 1 / 4S1≤S N <S M When the difference between the flow cross-sectional area of ​​the Nth sub-channel 512 and the flow cross-sectional area of ​​the first sub-channel 511 is too small, the refrigerant flow rate entering the Nth sub-channel 512 will still be greater than the refrigerant flow rate of the first sub-channel 511 due to the large amount of refrigerant in the Nth sub-channel 512; when the difference between the flow cross-sectional area of ​​the Nth sub-channel 512 and the flow cross-sectional area of ​​the first sub-channel 511 is too large, that is, the flow cross-sectional area of ​​the Nth sub-channel 512 is too small, the refrigerant will be blocked from entering, making the refrigerant flow rate of the Nth sub-channel 512 too small. Therefore, the flow cross-sectional area S of the Nth sub-channel 512 is too small. N , the flow cross-sectional area S1 of the first sub-channel 511 and the flow cross-sectional area S of the Mth sub-channel 513 M Satisfying 1 / 4S1≤S N <S M A more even distribution effect can be achieved.

[0069] As shown in Figure 1, in a specific embodiment, the number of second heat exchange tubes 5 is at least two, and at least two second heat exchange tubes 5 are arranged at intervals along the first direction; the battery heat exchange device also includes a first plate 6, and the first plate 6 is at least partially located in the tube cavity of the second header 3. The first plate 6 can isolate the tube cavity of the second header 3.

[0070] The number of second heat exchange tubes 5 can be adjusted based on actual heat exchange requirements. However, too many second heat exchange tubes 5 will affect the heat exchange effect. Generally speaking, a range of 2-6 second heat exchange tubes 5 is sufficient. When there are at least two second heat exchange tubes 5, a first plate 6 can be installed within the lumen of the second header 3 to block the lumen, thereby changing the refrigerant flow path so that the refrigerant flows in an S-shaped direction within the battery heat exchange device.

[0071] As shown in Figures 7-8, in one specific embodiment, the battery heat exchange device further includes a second plate 7, which includes a first hole 71 that extends through the second plate 7. The second plate 7 is positioned on the second header 3, spaced apart from the first plate 6, and / or positioned within at least a portion of the second sub-tubes 12. Specifically, there may be one or more first holes 71, and in the first direction, at least one first hole 71 is inclined outward from one side of the first heat exchange tube 4.

[0072] The first hole 71 on the second plate 7 can allow the refrigerant of the previous process to converge. When the first hole 71 is inclined outward from the side of the first heat exchange tube 4, the inclined first hole 71 can change the flow direction of the refrigerant, so that the refrigerant collides with the wall of the second sub-tube 12 or the second collecting tube 3 after passing through the first hole 71 and is redistributed, reducing the original flow inertia that is unfavorable to uniform distribution, thereby further improving the uniformity of distribution.

[0073] As shown in FIG1 , an embodiment of the present application further provides a battery heat exchange device, comprising a first header 1, a first interface 2, a second header 3, a first heat exchange tube 4, and at least one second heat exchange tube 5. The first header 1 comprises a first sub-tube 11 and at least one second sub-tube 12, wherein the first sub-tube 11 is separated from the second sub-tube 12. The separation mentioned herein means that the first sub-tube 11 and the second sub-tube 12 are not connected, and the first sub-tube 11 and the second sub-tube 12 are arranged along the length direction of the first header 1; the first interface 2 is provided on the first sub-tube 11, and the first interface 2 is connected to the tube cavity of the first sub-tube 11; the second header 3 is spaced apart from the first header 1; the width direction of the first heat exchange tube 4 extends along the first direction, and the first heat exchange tube 4 is connected to the first sub-tube 11 and the second header 3; the width direction of the second heat exchange tube 5 extends along the first direction, and the second heat exchange tube 5 is connected to the second sub-tube 12 and the second header 3.

[0074] The second heat exchange tube 5 includes multiple first channels 51. The cross-sectional area of ​​any one of these multiple first channels 51 is greater than the cross-sectional area of ​​another first channel 51 along the first direction. The battery heat exchange device in this embodiment allows the refrigerant to flow toward the first channels 51 and into each of the first channels 51, resulting in a more uniform refrigerant flow rate within each of the first channels 51, thereby further improving the heat exchange effect of the battery heat exchange device on the battery. Because its operating principle and structure are substantially the same as those of the battery heat exchange device in the previous embodiment, they will not be described in detail herein.

[0075] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A battery heat exchange device, comprising: A first header (1), the first header (1) comprising a first sub-tube (11) and at least one second sub-tube (12), the first sub-tube (11) being separated from the second sub-tube (12), the first sub-tube (11) and the second sub-tube (12) being arranged along the length direction of the first header (1); A first interface (2), the first interface (2) being arranged on the first sub-tube (11), the first interface (2) being connected to the lumen of the first sub-tube (11); a second header (3), the second header (3) being arranged at an interval from the first header (1); A first heat exchange tube (4), wherein the width direction of the first heat exchange tube (4) extends along a first direction, and the first heat exchange tube (4) is connected to the first sub-tube (11) and the second header (3); At least one second heat exchange tube (5), the width direction of the second heat exchange tube (5) extending along the first direction, the second heat exchange tube (5) connecting the second sub-tube (12) and the second header (3); the second heat exchange tube (5) comprising N first channels (51), N>3, the N first channels (51) being arranged at intervals along the width direction of the second heat exchange tube (5), along the first direction, the first first channel (51) being defined as a first sub-channel (511), the Nth first channel (51) being defined as an Nth sub-channel (512), an Mth sub-channel (513) being provided between the first sub-channel (511) and the Nth sub-channel (512), the flow cross-sectional area of ​​the first sub-channel (511) being greater than the flow cross-sectional area of ​​the Mth sub-channel (513), and the flow cross-sectional area of ​​the Mth sub-channel (513) being greater than the flow cross-sectional area of ​​the Nth sub-channel (512).

2. The battery heat exchange device according to claim 1, wherein: The first heat exchange tube (4) comprises a plurality of second channels (41), the plurality of second channels (41) being arranged at intervals along the width direction of the first heat exchange tube (4), and at least some of the plurality of second channels (41) having the same flow cross-sectional area; The first interface (2) is located in the middle of the first sub-tube (11) along the length direction.

3. The battery heat exchange device according to claim 1 or 2, wherein: Along the first direction, the flow cross-sectional areas of the N first channels (51) decrease linearly.

4. The battery heat exchange device according to claim 3, wherein: On the cross section of the second heat exchange tube (5), the height of the first sub-channel (511) is defined as H1, the width of the first sub-channel (511) is defined as W1, and the height of the Mth sub-channel (513) is defined as H2. M The width of the Mth subchannel (513) is W M , the height of the Nth subchannel (512) is H N The width of the Nth subchannel (512) is W N , then: H1=H M =H N , W1>W M >W N ; or H1>H M >H N , W1=W M =W N .

5. The battery heat exchange device according to claim 1 or 2, wherein: At least two adjacent first channels (51) with equal flow cross-sectional areas are defined as a channel group, and the second heat exchange tube (5) includes at least two channel groups; The sum of the flow cross-sectional areas of the first channels (51) within the same channel group is defined as the flow cross-sectional area of ​​the channel group. Along the first direction, the flow cross-sectional area of ​​the channel group decreases linearly.

6. The battery heat exchange device according to claim 5, wherein: There are multiple channel groups, and the channel group where the first sub-channel (511) is located is defined as a first channel group (514), the channel group where the Nth sub-channel (512) is located is defined as an Nth channel group (515), and the channel group where the Mth sub-channel (513) is located is defined as an Mth channel group (516); The height of the first sub-channel (511) is H1', ​​the width of the first sub-channel (511) is W1', and the height of the Mth sub-channel (513) is H M ', the width of the Mth subchannel (513) is W M ', the height of the Nth subchannel (512) is H N ', the width of the Nth subchannel (512) is W N ', then: H1'=H M '=H N ',W1'>W M '>W N '.

7. The battery heat exchange device according to claim 1 or 2 or 4 or 6, wherein: The flow cross-sectional area of ​​the first sub-channel (511) is defined as S1, and the flow cross-sectional area of ​​the Nth sub-channel (512) is defined as S N The flow cross-sectional area of ​​the Mth sub-channel (513) is S M , then: 1 / 4S1≤S N <S M .

8. The battery heat exchange device according to claim 1, 2, 4 or 6, wherein: The number of the second heat exchange tubes (5) is at least two, and at least two of the second heat exchange tubes (5) are arranged at intervals along the first direction; The battery heat exchange device further comprises a first plate (6), wherein the first plate (6) is at least partially located in the tube cavity of the second header (3), and the first plate (6) is capable of blocking the tube cavity of the second header (3).

9. The battery heat exchange device according to claim 8, wherein: The battery heat exchange device further comprises a second plate (7), wherein the second plate (7) comprises a first hole (71), and the first hole (71) penetrates the second plate (7); The second plate (7) is located on the second header (3), and the second plate (7) is spaced apart from the first plate (6), and / or the second plate (7) is located on at least part of the second sub-tube (12).

10. The battery heat exchange device according to claim 9, wherein: The number of the first holes (71) is one or more, and in the first direction, at least one of the first holes (71) is inclined outward from one side of the first heat exchange tube (4).

11. A battery heat exchange device, comprising: A first header (1), the first header (1) comprising a first sub-tube (11) and at least one second sub-tube (12), the first sub-tube (11) being separated from the second sub-tube (12), the first sub-tube (11) and the second sub-tube (12) being arranged along the length direction of the first header (1); A first interface (2), the first interface (2) being arranged on the first sub-tube (11), the first interface (2) being connected to the lumen of the first sub-tube (11); a second header (3), the second header (3) being arranged at an interval from the first header (1); A first heat exchange tube (4), wherein the width direction of the first heat exchange tube (4) extends along a first direction, and the first heat exchange tube (4) is connected to the first sub-tube (11) and the second header (3); At least one second heat exchange tube (5), the width direction of the second heat exchange tube (5) extending along the first direction, the second heat exchange tube (5) connecting the second sub-tube (12) and the second header (3); the second heat exchange tube (5) comprising a plurality of first channels (51), the flow cross-sectional area of ​​any first channel (51) among the plurality of first channels (51) being greater than the flow cross-sectional area of ​​another first channel (51) along the first direction.

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