Harmonica-shaped tube assembly and battery pack

Abstract

The utility model provides a harmonica-shaped tube assembly and a battery pack. Wherein the harmonica-shaped tube assembly comprises a plurality of harmonica-shaped tubes, a plurality of turbulent flow pieces, a liquid inlet tube and a liquid outlet tube, each harmonica-shaped tube is provided with at least one flow channel, the turbulent flow pieces are arranged in the flow channels in a penetrating mode and divide the flow channels into a plurality of sub-flow channels, each turbulent flow piece is provided with a plurality of turbulent flow structures, the turbulent flow structures are located in the sub-flow channels, and the two ends of each harmonica-shaped tube communicate with the liquid inlet tube and the liquid outlet tube correspondingly; the harmonica-shaped pipes are sequentially arranged in the length direction of the liquid inlet pipe, the distance between every two adjacent turbulent flow structures in the flow channel in the flowing direction of liquid is a first distance, and the first distances formed by the turbulent flow structures of at least two harmonica-shaped pipes are different in size. According to the utility model, the problem of poor temperature uniformity of the liquid cooling component of the battery pack in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a harmonica pipe assembly and a battery pack. Background Art

[0002] As a common liquid cooling component of battery packs, harmonica tubes are widely used because of their low manufacturing cost, light weight, and relatively simple structure, thanks to the processing method of one-piece extrusion molding using an extrusion die. Harmonica tubes are generally used as one-way flow channels with a single flow direction. In this way, since harmonica tubes are generally installed between the liquid inlet and the liquid outlet, the cooling effect of the harmonica tubes farther away from the total liquid inlet in the side-by-side harmonica tubes is worse, resulting in poor temperature uniformity of the entire liquid cooling component. Utility Model Content

[0003] The main purpose of the utility model is to provide a harmonica pipe assembly and a battery pack to solve the problem of poor temperature uniformity of the liquid cooling component of the battery pack in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a harmonica tube assembly is provided, comprising a plurality of harmonica tubes, a plurality of spoilers, a liquid inlet pipe and a liquid outlet pipe, the harmonica tube having at least one flow channel, the spoiler passing through the flow channel and dividing the flow channel into a plurality of sub-flow channels, the spoiler having a plurality of spoiler structures, the spoiler structures being located in the sub-flow channels, the two ends of the harmonica tube being respectively connected with the liquid inlet pipe and the liquid outlet pipe, the plurality of harmonica tubes being arranged in sequence along the length direction of the liquid inlet pipe, the distance between two adjacent spoiler structures along the flow direction of the liquid in the flow channel is a first distance, and the first distance formed by the spoiler structures of at least two harmonica tubes is different in size.

[0005] Furthermore, along the flow direction of the liquid in the liquid inlet pipe, the first distance formed by the flow disturbance structures of different harmonica tubes gradually increases.

[0006] Furthermore, the first distances in the same harmonica tube are equal.

[0007] Furthermore, the spoiler structure is a protrusion, and the surface of the protrusion is an arc-shaped surface.

[0008] Furthermore, two sub-flow channels are formed on opposite sides of the spoiler respectively, and both opposite sides of the spoiler have a spoiler structure.

[0009] Furthermore, there are multiple flow channels in the harmonica tube, and at least one spoiler is arranged in each flow channel.

[0010] Furthermore, the spoiler is an elastic member. When the spoiler is located in the flow channel, the inner wall surface in the thickness direction of the flow channel squeezes the spoiler, and the spoiler is in a compressed state.

[0011] Furthermore, the spoiler comprises a first section and a second section connected by a bend, the first section and the second section respectively serve as side walls of two sub-channels, and the side surfaces of the first section and the second section which are away from each other have a spoiler structure.

[0012] Furthermore, the first section and the second section both have a first end and a second end, the first end of the first section is bent and connected to the first end of the second section, and the harmonica tube assembly also includes a limiter, which is connected to the second end of the first section and the second end of the second section and prevents the spoiler from exiting the flow channel.

[0013] According to another aspect of the utility model, a battery pack is provided, comprising a case, a battery cell and the above-mentioned harmonica tube assembly, wherein the harmonica tube assembly is located between the battery cell and the case.

[0014] By applying the technical solution of the utility model, a flow disturbance structure is arranged in the flow channel, and the flow rate of the liquid flowing through each harmonica tube is adjusted by utilizing the difference in the first distance of the flow disturbance structure, thereby adjusting the heat exchange efficiency of each harmonica tube, thereby improving the temperature uniformity between the harmonica tubes. Specifically, the flow disturbance structure blocks the flow of the liquid in the flow channel, thereby increasing the flow resistance in the flow channel, thereby being able to adjust the flow rate flowing into each harmonica tube, thereby controlling the average flow rate of the liquid in different flow channels, and then being able to reduce the flow difference of the liquid flowing through different flow channels by arranging the same or different numbers of flow disturbance structures in different flow channels, thereby improving the temperature uniformity. More specifically, on the one hand, the flow into different flow channels The initial flow rates of the liquids are different. The flow resistance in different flow channels is adjusted by setting a spoiler structure. As for the liquid, it tends to flow into the flow channel with small flow resistance, thereby increasing the amount of liquid flowing into the flow channel with small flow resistance, and adjusting the flow rate into each flow channel to reduce the difference in heat exchange of the liquid in different flow channels. On the other hand, as the liquid flows, the temperature of the liquid will increase due to continuous heat exchange. In this way, the initial temperature of the liquid flowing into the harmonica pipe will also be different. The liquid is disturbed by setting a spoiler structure, thereby adjusting the flow state of the liquid in the flow channel, thereby balancing the heat that can be taken away by the liquid in different flow channels to reduce the temperature difference. In the above, the spoiler structure is set to increase the flow resistance to balance the flow rate, and the heat exchange effect at different positions is balanced to reduce the temperature difference, thereby improving the temperature uniformity of the harmonica pipe assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 An exploded view of the battery pack of the present utility model is shown;

[0017] Figure 2A schematic diagram of the structure of a harmonica pipe assembly is shown;

[0018] Figure 3 A partial structural schematic diagram of a harmonica pipe and a spoiler is shown;

[0019] Figure 4 A schematic diagram of the assembly of the spoiler is shown;

[0020] Figure 5 Shows Figure 4 Assembly diagram from another angle;

[0021] Figure 6 Shows Figure 5 A partial enlarged view of the assembly area;

[0022] Figure 7 A schematic diagram of the structure of the harmonica pipe and the spoiler is shown;

[0023] Figure 8 Shows Figure 7 A partial enlarged view of

[0024] Fig. 9 A schematic diagram of the structure of the spoiler is shown;

[0025] Fig.10 Shows Fig. 9 A local enlarged view of point A;

[0026] Fig.11 Shows Fig. 9 A local enlarged view of point B;

[0027] Fig.12 A schematic diagram of the distribution of the spoiler structure is shown;

[0028] Fig.13 A schematic diagram showing the distribution of another type of spoiler structure with different density levels is shown;

[0029] Fig.14 A schematic diagram showing the distribution of another spoiler structure with different densities is shown;

[0030] Fig.15 A schematic diagram of the internal structure of a harmonica pipe assembly is shown;

[0031] Fig.16 Shows Fig.15 A local enlarged view of point C;

[0032] Fig.17 Shows Fig.15 A local enlarged view of D;

[0033] Fig.18 Shows Fig.15 A local enlarged view of point E.

[0034] The above drawings include the following reference numerals:

[0035] 10. harmonica tube; 11. flow channel; 111. sub-flow channel; 12. limiter; 20. spoiler; 21. spoiler structure; 30. liquid inlet pipe; 40. liquid outlet pipe; 50. battery cell; 60. box body. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0038] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0039] In order to solve the problem of poor temperature uniformity of a liquid cooling component of a battery pack in the prior art, the utility model provides a harmonica pipe assembly and a battery pack.

[0040] like Figures 1 to 18 A harmonica tube assembly is shown, comprising a plurality of harmonica tubes 10, a plurality of spoilers 20, a liquid inlet tube 30 and a liquid outlet tube 40, the harmonica tube 10 having at least one flow channel 11, the spoiler 20 passing through the flow channel 11 and dividing the flow channel 11 into a plurality of sub-flow channels 111, the spoiler 20 having a plurality of spoiler structures 21, the spoiler structures 21 being located in the sub-flow channels 111, the two ends of the harmonica tube 10 being respectively connected with the liquid inlet tube 30 and the liquid outlet tube 40, the plurality of harmonica tubes 10 being arranged in sequence along the length direction of the liquid inlet tube 30, the distance between two adjacent spoiler structures 21 in the flow direction of the liquid in the flow channel 11 being a first distance, and the first distance formed by the spoiler structures 21 of at least two harmonica tubes 10 being different in size.

[0041] In this embodiment, a flow disturbance structure 21 is arranged in the flow channel 11, and the flow rate of the liquid flowing through each harmonica tube 10 is adjusted by using the different first distances of the flow disturbance structure 21. Fig.12 , Fig.13 , Fig.14The structure is a structure in which the first distance increases successively, so as to adjust the heat exchange efficiency of each harmonica tube, thereby improving the temperature uniformity between each harmonica tube. Specifically, the spoiler structure 21 blocks the flow of liquid in the flow channel 11, thereby increasing the flow resistance in the flow channel 11, so as to adjust the flow rate flowing into each harmonica tube 10, thereby controlling the average flow rate of the liquid in different flow channels 11, and then by arranging the same or different numbers of spoiler structures 21 in different flow channels 11, the flow rate difference of the liquid flowing through different flow channels 11 can be reduced, thereby improving the temperature uniformity. More specifically, on the one hand, the initial flow rate of the liquid flowing into different flow channels 11 is different, and by arranging the spoiler structure 21 adjusts the flow resistance in different flow channels 11, and for liquid, it has a tendency to flow into the flow channel 11 with small flow resistance, so that the amount of liquid flowing into the flow channel 11 with small flow resistance increases, and the flow rate flowing into each flow channel 11 is adjusted to reduce the difference in heat exchange of the liquid in different flow channels 11. On the other hand, as the liquid flows, the temperature of the liquid will increase due to continuous heat exchange, so that the initial temperature of the liquid flowing into the harmonica pipe 10 will also be different. The liquid is disturbed by setting the spoiler structure 21, so as to adjust the flow state of the liquid in the flow channel 11, so as to balance the heat that can be taken away by the liquid in different flow channels 11 to reduce the temperature difference. In the above, by setting the spoiler structure 21 to increase the flow resistance to balance the flow, the heat exchange effect at different positions is balanced to reduce the temperature difference, thereby improving the temperature uniformity of the harmonica pipe assembly.

[0042] The liquid inlet pipe 30 and the liquid outlet pipe 40 of the present embodiment are both in the shape of long strips, wherein the end of the liquid inlet pipe 30 has a total liquid inlet, the end of the liquid outlet pipe 40 has a total liquid outlet, the middle side of the liquid inlet pipe 30 is also provided with a plurality of branch liquid outlets, the middle side of the liquid outlet pipe 40 is also provided with a plurality of branch liquid inlets, one end of the harmonica tube 10 is connected with the branch liquid outlet of the liquid inlet pipe 30, and the other end is connected with the branch liquid inlet of the liquid outlet pipe 40, so that the overall flow direction of the liquid is to enter the liquid inlet pipe 30 from the total liquid inlet of the liquid inlet pipe 30, enter different harmonica tubes 10 through different branch liquid outlets of the liquid inlet pipe 30, and then the harmonica tubes 10 uniformly enter the liquid outlet pipe 40 through the branch liquid inlets, and then flow out from the total liquid outlet of the liquid outlet pipe 40. Of course, the specific arrangement of the liquid inlet pipe 30 and the liquid outlet pipe 40 can be adjusted as needed, and is not limited to the arrangement described above in the present embodiment.

[0043] It should be noted that the scenario targeted by this embodiment is that the total liquid inlet of the liquid inlet pipe 30 and the total liquid outlet of the liquid outlet pipe 40 are located on the same side of the harmonica pipe 10. The same side here refers to the side where the long side of the harmonica pipe 10 is located, that is, Figure 2The total liquid inlet of the liquid inlet pipe 30 and the total liquid outlet of the liquid outlet pipe 40 are both located on the left or right side of the harmonica tube. In this way, the flow channel close to the total liquid inlet of the liquid inlet pipe 30 is actually also the flow channel close to the total liquid outlet of the liquid outlet pipe 40. Of course, for other arrangements of the liquid inlet pipe 30 and the liquid outlet pipe 40, such as arranging the total liquid inlet and the total liquid outlet on opposite sides of the long side of the harmonica tube 10, the arrangement of this embodiment can also play a certain role in balancing the flow between the inlet and outlet of each flow channel, which is conducive to balancing the temperature of each harmonica tube.

[0044] It should be noted that the length direction of the spoiler 20, the length direction of the flow channel, and the length direction of the harmonica tube 10 of this embodiment are consistent, and both are perpendicular to the length directions of the liquid inlet pipe 30 and the liquid outlet pipe 40. Of course, the specific arrangement is not limited to the above-mentioned manner of this embodiment, and other arrangements such as forming an acute angle may also be adopted.

[0045] In this embodiment, along the flow direction of the liquid in the liquid inlet pipe 30, the first distance formed by the spoiler structures 21 of each harmonica tube 10 gradually increases, that is, the spoiler structures 21 in the flow channel close to the total liquid inlet of the liquid inlet pipe 30 are arranged more densely on the spoiler 20. Specifically, Figure 2 As shown, the liquid inlet pipe 30 and the liquid outlet pipe 40 are arranged in parallel and spaced apart, and each harmonica tube 10 is connected in parallel between the liquid inlet pipe 30 and the liquid outlet pipe 40, so that the inlet of each flow channel 11, that is, the branch liquid outlet of the liquid inlet pipe 30, is respectively connected to different positions on the length of the liquid inlet pipe 30, and the outlet of each flow channel 11, that is, the branch liquid inlet of the liquid outlet pipe 40, is respectively connected to different positions on the length of the liquid outlet pipe 40, and the flow direction of the liquid in each flow channel 11 is the same. Based on the above arrangement, when the spoiler 20 is not provided, the flow channel 11 close to the total liquid inlet of the liquid inlet pipe 30 has a higher flow rate and a lower temperature than the flow channel 11 far away from the total liquid inlet of the liquid inlet pipe 30, which will result in poor temperature uniformity of each flow channel 11. This embodiment improves this situation by providing spoilers 20 with different first distances in different flow channels 11. More specifically, as Fig.15 As shown, according to the position where the flow channel 11 is connected to the liquid inlet pipe 30, along the flow direction of the liquid from front to back, that is, along Fig.15 In the direction from left to right of the liquid inlet pipe 30, the first distance of each spoiler 20 gradually increases, such as Fig.16 , Fig.17 , Fig.18As shown, a more densely arranged spoiler structure 21 is provided in the flow channel 11 close to the total liquid inlet of the liquid inlet pipe 30, so as to hinder the flow of liquid and improve the local temperature uniformity, and a more sparsely arranged spoiler structure 21 is provided in the flow channel 11 away from the total liquid inlet of the liquid inlet pipe 30, so that while disturbing the flow, the flow channel 11 away from the total liquid inlet of the liquid inlet pipe 30 has a smaller flow resistance than the flow channel 11 close to the total liquid inlet of the liquid inlet pipe 30, so that more heat is taken away by increasing the flow velocity and flow rate of the flow channel 11 away from the total liquid inlet of the liquid inlet pipe 30, so as to compensate for the disadvantages of higher liquid temperature, lower flow velocity and smaller flow rate obtained from the liquid inlet pipe 30, thereby improving the temperature uniformity of each flow channel 11. Of course, in addition to the setting method of gradually increasing the first distance in the harmonica tube 10, the first distance in some adjacent harmonica tubes 10 can also be kept unchanged. In this way, the first distance still gradually increases as a whole, but there is a situation where the first distance remains unchanged at some positions. In this way, the effect of uniform temperature can also be achieved.

[0046] It should be noted that the specific variation of the first distance in each harmonica tube 10 is related to factors such as the specific arrangement of the harmonica tube 10 and the direction of liquid flow. When the specific settings such as the arrangement of the harmonica tube 10 change, the variation relationship of the first distance in each harmonica tube 10 can also be adjusted accordingly, as long as the flow rate, flow velocity, etc. of the fluid in each harmonica tube 10 can be kept as similar as possible.

[0047] like Figure 7 and Figure 8 As shown, in this embodiment, the first distances in the same harmonica tube 10 are equal. Fig.12 The spoiler 20 is the same as the first distance, Fig.13 , Fig.14 The spoilers 20 are also the same in the first distance. In this way, the spoilers 20 with the same first distance are set in the flow channel 11, so that the spoiler structure 21 in the same harmonica tube 10 has the same spoiler effect on the liquid, which can improve the stability of the liquid flow, balance the heat exchange effect of each flow channel 11 of the same harmonica tube 10, make the heat exchange effect more stable, and also facilitate processing and arrangement. Of course, the first distances in the same harmonica tube 10 can also be set to unequal forms as needed, so that a single flow channel 11 also has a better temperature uniformity effect.

[0048] In the present embodiment, the spoiler structure 21 is a protrusion, and the protrusion can change the flow direction and flow rate of the liquid around the protrusion, that is, when the liquid hits the concave-convex spoiler structure 21, it can change the speed of the liquid around the spoiler structure 21 to form a small vortex, thereby enhancing the turbulence intensity of the liquid, ensuring that the heat can be taken away more effectively, and strengthening the heat exchange effect. The surface of the protrusion can be set to different shapes such as arc, square, and broken line. Preferably, the surface of the protrusion is a curved surface. Compared with the design of sharp angles or right angles, the curved surface enhances the turbulence intensity of the liquid while reducing the resistance generated by the liquid when flowing through the protrusion, guiding the liquid flow more naturally, reducing the friction between the liquid and the protrusion surface, thereby reducing energy loss. Optionally, the curved surface can be set to a semicircular, elliptical or fan-shaped structure. Of course, the spoiler structure 21 can also be set to other structures such as pits and baffles, which can achieve the purpose of adjusting the flow rate of the liquid.

[0049] In the present embodiment, two sub-channels 111 are formed on opposite sides of the spoiler 20, and both opposite sides of the spoiler 20 have a spoiler structure 21. Specifically, the spoiler 20 is inserted into the harmonica tube 10, and the upper and lower surfaces are in contact with the upper and lower inner walls of the harmonica tube 10 respectively. The spoiler structure 21 is provided on the left and right sides, thereby dividing the flow channel 11 into a left sub-channel and a right sub-channel. A spoiler structure 21 is provided in each sub-channel 111 to adjust the flow state, thereby changing the single flow channel 11 of the harmonica tube 10, improving the temperature uniformity of the harmonica tube assembly, and ensuring that the spoiler structure 21 plays a role in each sub-channel 111. Moreover, the contact between the spoiler 20 and the two inner walls of the harmonica tube 10 enables the spoiler 20 to support the harmonica tube 10 and enhance the strength of the harmonica tube 10. It should be noted that the upper and lower surfaces of the spoiler 20 refer to the two opposite surfaces extending along the length direction that are not provided with the spoiler structure 21, that is, Figure 4 The two surfaces in the upper and lower directions, the left and right sides of the spoiler 20 refer to the two sides where the spoiler structure 21 is provided, that is, Figure 4 The left and right sides of the .

[0050] In this embodiment, there are multiple flow channels 11 in the harmonica tube 10, and at least one spoiler 20 is disposed in each flow channel 11. Figure 3 As shown, in this embodiment, a flow channel 11 is arranged in each harmonica tube 10, and the multiple flow channels 11 of the harmonica tube 10 are arranged side by side and adjacent to each other, that is, two adjacent flow channels 11 have the same side wall, and the direction in which the flow channels 11 are arranged side by side is the same as the arrangement direction of each harmonica tube 10, and are arranged along the flow direction of the liquid in the liquid inlet pipe 30. Of course, the specific arrangement of the harmonica tube 10 and the flow channels 11 can also be adjusted as needed. Figure 4As shown, in this embodiment, a spoiler 20 is disposed in each flow channel 11, so that each flow channel 11 is divided into two sub-flow channels 111, so that the flow resistance of each flow channel 11 can be adjusted to balance the heat exchange effect.

[0051] Preferably, the spoiler 20 is an elastic member. When the spoiler 20 is located in the flow channel 11, the inner wall surface of the flow channel 11 in the thickness direction squeezes the spoiler 20, and the spoiler 20 is in a compressed state, that is, in the thickness direction of the harmonica tube 10, the upper and lower surfaces of the spoiler 20 are in contact with the upper and lower inner walls of the harmonica tube 10. When the spoiler 20 is not compressed, its thickness is greater than the thickness of the harmonica tube 10. Therefore, when the spoiler 20 is installed in the harmonica tube 10, the spoiler 20 is limited in the upper and lower thickness directions of the harmonica tube 10 and is squeezed and deformed, so that the spoiler 20 can be stably fixed in the flow channel 11, avoiding the position being moved by the impact of liquid flow and causing changes in the shape and size of the sub-flow channels 111 on both sides. At the same time, it can provide support for the side walls of the harmonica tube 10 to improve the strength of the harmonica tube 10. Optionally, a rubber strip can be used for the spoiler 20.

[0052] In this embodiment, the spoiler 20 includes a first section and a second section connected by a bend, the first section and the second section respectively serve as side walls of two sub-channels 111, and the side surfaces of the first section and the second section away from each other have a spoiler structure 21. Specifically, Fig. 9 As shown, the first section and the second section of the spoiler 20 are symmetrically arranged and have the same length. The spoiler structures 21 are symmetrically arranged on two surfaces of the first section and the second section that are away from each other. When inserted into the flow channel 11, the first section and the second section are arranged perpendicular to the arrangement direction of the flow channel 11 facing the same two side surfaces, and are in contact with the upper and lower inner walls of the harmonica tube 10, thereby achieving the stability of the spoiler 20, and cooperating with the structures of the first section and the second section themselves to separate the flow channel 11 into two sub-flow channels 111, and each sub-flow channel 111 can have the spoiler structure 21 to adjust the heat exchange effect.

[0053] In an embodiment not shown in the figure, the spoiler 20 does not adopt a two-stage bending structure, but adopts a single strip structure. The spoiler 20 is still arranged in the flow channel 11, and the spoiler structure 21 is arranged on both opposite sides of the spoiler 20, so that the spoiler 20 can also achieve the effects of spoiler and temperature uniformity. Of course, the spoiler 20 can also adopt other structural forms such as three or more sections, as long as it can be arranged in the flow channel 11 and cooperate with the spoiler structure 21 to achieve the effects of spoiler and temperature uniformity.

[0054] In this embodiment, the first section and the second section both have a first end and a second end. Figure 4 , Fig.10 As shown, the first end of the first section is bent and connected to the first end of the second section, and the bent first section and the second section are substantially parallel, as shown in FIG. Figure 5, Figure 6 As shown, the harmonica pipe assembly further includes a stopper 12, which is connected to the second end of the first section and the second end of the second section and prevents the spoiler 20 from exiting the flow channel 11. During assembly, the first section and the second section enter the flow channel 11 at the same time, the second end enters the flow channel 11 first, and is pulled out from the other end of the flow channel 11, and is fixed by the stopper 12. Optionally, the stopper 12 can use a fixed clamp ring, such as Fig.11 As shown, the second ends of the first section and the second section are both provided with a limiting groove connected to a fixing snap ring, and the size of the fixing snap ring is larger than the thickness of the flow channel 11, so that the first section and the second section are fixed together and the spoiler 20 is limited as a whole in the flow channel 11. Of course, the second end can also be fixed in other structural forms, and the limiting member 12 can be correspondingly other components, such as a through hole is provided at the second end of the first section and the second section, and the limiting member 12 uses a positioning pin, and the positioning pin is penetrated in the through hole to achieve fixation.

[0055] This embodiment also provides a battery pack, including a box 60, a battery cell 50 and the above-mentioned harmonica tube assembly, such as Figure 1 As shown, the harmonica tube assembly is located between the battery cell 50 and the box body 60 , thereby improving the heat dissipation performance of the box body 60 and thus enhancing the safety of the battery cell 50 .

[0056] It should be noted that, the multiple in the above embodiments refers to at least two.

[0057] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0058] 1. The setting of the spoiler structure solves the problem of poor temperature uniformity of the liquid cooling components of the battery pack in the prior art;

[0059] 2. The temperature uniformity of the harmonica pipe assembly is further improved by setting different first distances;

[0060] 3. The spoiler supports the harmonica tube and improves the strength of the harmonica tube.

[0061] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0064] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A harmonica pipe assembly, characterized in that: include: A plurality of harmonica tubes (10), each of the harmonica tubes (10) having at least one flow channel (11); a plurality of spoilers (20), the spoilers (20) being arranged in the flow channel (11) and dividing the flow channel (11) into a plurality of sub-flow channels (111), the spoilers (20) having a plurality of spoiler structures (21), the spoiler structures (21) being located in the sub-flow channels (111); A liquid inlet pipe (30) and a liquid outlet pipe (40), two ends of the harmonica pipe (10) are respectively connected to the liquid inlet pipe (30) and the liquid outlet pipe (40), a plurality of the harmonica pipes (10) are arranged in sequence along the length direction of the liquid inlet pipe (30), a distance between two adjacent flow disturbance structures (21) in the flow channel (11) along the flow direction of the liquid is a first distance, and the first distances formed by the flow disturbance structures (21) of at least two of the harmonica pipes (10) are different in size.

2. The harmonica pipe assembly according to claim 1, characterized in that: Along the flow direction of the liquid in the liquid inlet pipe (30), the first distance formed by the flow disturbance structures (21) of the different harmonica pipes (10) gradually increases.

3. The harmonica pipe assembly according to claim 2, characterized in that: The first distances in the same harmonica tube (10) are equal.

4. The harmonica pipe assembly according to claim 1, characterized in that: The spoiler structure (21) is a protrusion, and the surface of the protrusion is an arc-shaped surface.

5. The harmonica pipe assembly according to claim 1, characterized in that: Two sub-flow channels (111) are respectively formed on two opposite sides of the spoiler (20), and the spoiler (20) has the spoiler structure (21) on both opposite sides.

6. The harmonica pipe assembly according to claim 1, characterized in that: There are a plurality of flow channels (11) in the harmonica tube (10), and at least one spoiler (20) is arranged in each of the flow channels (11).

7. The harmonica pipe assembly according to claim 1, characterized in that: The spoiler (20) is an elastic member. When the spoiler (20) is located in the flow channel (11), the inner wall surface of the flow channel (11) in the thickness direction squeezes the spoiler (20), and the spoiler (20) is in a compressed state.

8. The harmonica pipe assembly according to claim 1, characterized in that: The spoiler (20) comprises a first section and a second section connected in a bent manner, the first section and the second section respectively serving as side walls of two sub-channels (111), and the spoiler structure (21) is provided on the sides of the first section and the second section which are away from each other.

9. The harmonica pipe assembly according to claim 8, characterized in that: The first section and the second section both have a first end and a second end, the first end of the first section is bent and connected to the first end of the second section, and the harmonica pipe assembly further comprises a limiting member (12), the limiting member (12) is connected to the second end of the first section and the second end of the second section, and prevents the spoiler (20) from exiting the flow channel (11).

10. A battery pack, characterized in that: It comprises a box (60), a battery core (50) and a harmonica pipe assembly according to any one of claims 1 to 9, wherein the harmonica pipe assembly is located between the battery core (50) and the box (60).

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