Pipeline assembly and energy storage device thereof

Abstract

The utility model discloses a pipeline assembly and an energy storage device thereof. The pipeline assembly comprises a main pipeline, at least one first auxiliary pipeline and at least one second auxiliary pipeline. The main pipeline extends in the vertical direction and is suitable for being connected with a circulating heat exchanger. One end of the first auxiliary pipeline is connected with the main pipeline, and the other end of the first auxiliary pipeline is suitable for being connected with a heat dissipation plate. One end of the second auxiliary pipeline is connected with the main pipeline, and the other end of the second auxiliary pipeline is suitable for being connected with a heat dissipation plate. Wherein the second auxiliary pipeline is located below the first auxiliary pipeline, and the inner diameter of the second auxiliary pipeline is larger than that of the first auxiliary pipeline. According to the pipeline assembly disclosed by the utility model, the amounts of cooling liquid flowing to different heat dissipation plates can be basically consistent, so that the heat dissipation efficiency of the energy storage device is ensured, the influence on normal use caused by over-high local temperature of the energy storage device is avoided, the use stability and the use safety of the energy storage device are further improved, and the service life of the energy storage device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, in particular to a pipeline assembly and an energy storage device thereof. Background Art

[0002] In the related art, the energy storage device usually includes a liquid cooling pipeline, multiple battery packs and air conditioning refrigeration equipment, and the liquid cooling pipeline is connected between the multiple battery packs and the air conditioning refrigeration equipment. However, since the liquid cooling pipeline is connected to multiple battery packs, the coolant in the liquid cooling pipeline cannot be evenly distributed to the multiple battery packs, resulting in inconsistent heat dissipation of the multiple battery packs, which will cause the local temperature of the energy storage device to be too high, affecting the normal use of the energy storage device. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a pipeline assembly so that the amount of coolant flowing to different heat sinks is basically the same, thereby ensuring the heat dissipation efficiency of the energy storage device while avoiding the local temperature of the energy storage device being too high and affecting normal use.

[0004] Another object of the utility model is to provide an energy storage device using the above pipeline assembly.

[0005] According to the pipeline assembly of the embodiment of the first aspect of the utility model, it includes: a main pipeline, which extends in the up-down direction and is suitable for being connected to a circulation heat exchanger; at least one first sub-pipeline, one end of the first sub-pipeline is connected to the main pipeline, and the other end of the first sub-pipeline is suitable for being connected to a heat sink; at least one second sub-pipeline, one end of the second sub-pipeline is connected to the main pipeline, and the other end of the second sub-pipeline is suitable for being connected to the heat sink, wherein the second sub-pipeline is located below the first sub-pipeline, and the inner diameter of the second sub-pipeline is larger than the inner diameter of the first sub-pipeline.

[0006] According to the pipeline assembly of the embodiment of the utility model, by connecting the first auxiliary pipeline and the second auxiliary pipeline on the main pipeline, the second auxiliary pipeline is located below the first auxiliary pipeline, and the inner diameter of the second auxiliary pipeline is larger than the inner diameter of the first auxiliary pipeline. The coolant flowing to the second auxiliary pipeline has a larger flow rate under the action of gravity, and the second auxiliary pipeline with a larger inner diameter is conducive to decelerating and reducing the pressure of the coolant; the coolant flowing to the first auxiliary pipeline has a smaller flow rate under the action of gravity, and the first auxiliary pipeline with a smaller inner diameter is conducive to accelerating and pressurizing the coolant. In this way, the amount of coolant flowing to different heat sinks can be made basically consistent, so as to ensure the heat dissipation efficiency of the energy storage device while avoiding the local temperature of the energy storage device being too high to affect normal use, thereby improving the use stability and safety of the energy storage device and extending the service life of the energy storage device.

[0007] According to some embodiments of the present invention, the inner diameter of the first auxiliary pipeline is α, and the inner diameter of the second auxiliary pipeline is β, wherein α and β respectively satisfy: 12.5mm≤α≤13.5mm, 17mm≤β≤18mm.

[0008] According to some embodiments of the utility model, a first liquid port is formed on the main pipeline, and the main pipeline is connected to the circulation heat exchanger through the first liquid port; the transmission path between the first sub-pipeline and the first liquid port is smaller than the transmission path between the second sub-pipeline and the first liquid port.

[0009] According to some embodiments of the present invention, the first liquid port is disposed adjacent to the middle portion of the main pipe.

[0010] According to some embodiments of the utility model, the main pipe includes a first pipe segment and a second pipe segment connected to each other, the first liquid port is formed on the first pipe segment, the first pipe segment is connected to the first sub-pipeline, and the second pipe segment is connected to the second sub-pipeline; wherein the length of the first pipe segment is greater than the length of the second pipe segment.

[0011] According to some embodiments of the present invention, a first connecting piece is provided at the end of the first pipe segment, and a second connecting piece is provided at the end of the second pipe segment. The first connecting piece and the second connecting piece are threadedly connected to achieve the connection between the first pipe segment and the second pipe segment.

[0012] According to some embodiments of the present invention, there are multiple first auxiliary pipelines and multiple second auxiliary pipelines, the multiple first auxiliary pipelines are spaced apart along the axial direction of the first pipe segment, and the multiple second auxiliary pipelines are spaced apart along the axial direction of the second pipe segment.

[0013] According to some embodiments of the utility model, the pipeline assembly also includes a third auxiliary pipeline, the main pipeline is connected to the circulation heat exchanger through the third auxiliary pipeline; a first branch pipeline, one end of the first branch pipeline is connected to the third auxiliary pipeline, and the other end of the first branch pipeline is suitable for being connected to the circulation heat exchanger; and a control valve, the control valve is arranged between the first branch pipeline and the third auxiliary pipeline.

[0014] According to some embodiments of the present invention, an exhaust valve is provided at one end of the main pipeline in the length direction.

[0015] According to some embodiments of the utility model, the pipeline assembly also includes a drain pipe connected to one end of the main pipeline in the length direction; and a stop valve, which is arranged at one end of the drain pipe away from the main pipeline.

[0016] According to some embodiments of the present utility model, the pipeline assembly also includes at least one second branch pipeline, one end of which is connected to the first auxiliary pipeline, and the other end of which is suitable for being connected to the heat sink; and at least one third branch pipeline, one end of which is connected to the second auxiliary pipeline, and the other end of which is suitable for being connected to the heat sink.

[0017] According to some embodiments of the present invention, the second branch pipeline and the third branch pipeline are both corrugated pipes.

[0018] According to some embodiments of the present invention, there are multiple second branch pipelines and multiple third branch pipelines, and the multiple second branch pipelines and the multiple third branch pipelines are spaced apart along the axial direction of the main pipeline.

[0019] According to some embodiments of the present utility model, the second branch pipeline includes a first sub-main pipeline and a plurality of first sub-sub-pipes, the first sub-main pipeline is connected to the first sub-pipeline, one end of each of the first sub-sub-pipes is connected to the first sub-main pipeline, and the other end of each of the first sub-sub-pipes is connected to the heat sink; the third branch pipeline includes a second sub-main pipeline and a plurality of second sub-sub-pipes, the second sub-main pipeline is connected to the second sub-pipeline, one end of each of the second sub-sub-pipes is connected to the second sub-main pipeline, and the other end of each of the second sub-sub-pipes is connected to the heat sink.

[0020] According to some embodiments of the present utility model, the pipeline assembly further includes a heat-insulating component, and the heat-insulating component is arranged on the outer peripheral surface of the main pipeline.

[0021] The energy storage device according to the embodiment of the second aspect of the utility model includes a plurality of pipeline assemblies, and the pipeline assembly is the pipeline assembly according to the embodiment of the first aspect of the utility model; wherein the plurality of pipeline assemblies include an inlet pipeline assembly and an outlet pipeline assembly, the main pipeline of the inlet pipeline assembly is connected to the liquid outlet of the circulation heat exchanger, and the first sub-pipeline and the second sub-pipeline of the inlet pipeline assembly are connected to the liquid inlets of the plurality of heat sinks; the main pipeline of the outlet pipeline assembly is connected to the liquid inlet of the circulation heat exchanger, and the first sub-pipeline and the second sub-pipeline of the outlet pipeline assembly are connected to the liquid outlets of the plurality of heat sinks.

[0022] According to some embodiments of the present utility model, the first branch pipeline of the liquid inlet pipeline assembly is connected to the liquid outlet of the circulating heat exchanger, and the second branch pipeline and the third branch pipeline of the liquid inlet pipeline assembly are connected to the liquid inlet of the heat sink; the first branch pipeline of the liquid outlet pipeline assembly is connected to the liquid inlet of the circulating heat exchanger, and the second branch pipeline and the third branch pipeline of the liquid outlet pipeline assembly are connected to the liquid outlet of the heat sink.

[0023] According to some embodiments of the utility model, the energy storage device also includes a cabinet, a partition is provided in the cabinet, the partition separates the interior of the cabinet into a first accommodating chamber and a second accommodating chamber, and the first accommodating chamber and the second accommodating chamber are arranged along the thickness direction of the cabinet; wherein the main pipeline and the third secondary pipeline of each pipeline assembly are located in the first accommodating chamber, and the second branch pipeline and the third branch pipeline of each pipeline assembly are located in the second accommodating chamber.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic diagram of a pipeline assembly according to an embodiment of the utility model;

[0027] Figure 2 is a schematic diagram of a pipeline assembly according to another embodiment of the utility model;

[0028] Figure 3 is a schematic diagram of an energy storage device according to an embodiment of the utility model, wherein an air conditioner is not shown;

[0029] Figure 4 yes Figure 3 A schematic diagram of the energy storage device shown in another angle;

[0030] Figure 5 is a schematic diagram of an energy storage device according to an embodiment of the utility model, wherein a battery pack is not shown;

[0031] Figure 6 yes Figure 5 The enlarged view of the A part shown in the middle circle;

[0032] Figure 7 yes Figure 5 The enlarged view of the part B shown in the middle circle;

[0033] Figure 8 yes Figure 5 A front view of the energy storage device shown in;

[0034] Fig. 9 yes Figure 5 A schematic diagram of the energy storage device shown in another angle.

[0035] Reference numerals:

[0036] 100: Pipeline assembly;

[0037] 1: main pipeline; 11: first pipe section; 111: first liquid port; 112: first connecting piece; 12: second pipe section; 121: second connecting piece; 13: exhaust valve; 2: first auxiliary pipeline; 3: second auxiliary pipeline; 4: third auxiliary pipeline; 5: first branch pipeline; 6: control valve; 7: drain pipe; 8: stop valve; 9: second branch pipeline; 91: first sub-main pipeline; 92: first sub-auxiliary pipeline; 101: third branch pipeline; 1011: second sub-main pipeline; 1012: second sub-auxiliary pipeline; 200: energy storage device; 201: cabinet; 2011: partition; 2012: first accommodating chamber; 2013: second accommodating chamber; 202: liquid inlet pipeline assembly; 203: liquid outlet pipeline assembly; 204: horizontal plate. DETAILED DESCRIPTION

[0038] Reference below Figure 1-Figure 9 The pipeline assembly 100 according to the first embodiment of the utility model is described. It should be noted that the utility model is described by taking the circulating heat exchanger as the heat exchanger of the air conditioner and the heat sink as the liquid cooling plate of the battery pack as an example, but it is not limited thereto.

[0039] like Figure 1-Figure 9 As shown, the pipeline assembly 100 according to the embodiment of the first aspect of the utility model includes a main pipeline 1, at least one first auxiliary pipeline 2 and at least one second auxiliary pipeline 3.

[0040] Specifically, the main pipeline 1 extends in the up-down direction, and the main pipeline 1 is suitable for connecting to the circulating heat exchanger. One end of the first auxiliary pipeline 2 is connected to the main pipeline 1, and the other end of the first auxiliary pipeline 2 is suitable for connecting to the heat sink. One end of the second auxiliary pipeline 3 is connected to the main pipeline 1, and the other end of the second auxiliary pipeline 3 is suitable for connecting to the heat sink. Among them, the second auxiliary pipeline 3 is located below the first auxiliary pipeline 2, and the inner diameter of the second auxiliary pipeline 3 is larger than the inner diameter of the first auxiliary pipeline 2.

[0041] For example, in Figure 1 and Figure 2 In the example of FIG. 1 , in the axial direction of the main pipeline 1 (for example, Figure 1 In the up and down direction in the drawing, the first auxiliary pipeline 2 is connected to the upper part of the main pipeline 1, and the second auxiliary pipeline 3 is connected to the lower part of the main pipeline 1. The first auxiliary pipeline 2 and the second auxiliary pipeline 3 are arranged at intervals in the axial direction of the main pipeline 1 to avoid interference between the first auxiliary pipeline 2 and the second auxiliary pipeline 3, which is beneficial to the diversion of the coolant.

[0042] The main line 1 is connected to a circulating heat exchanger, such as a heat exchanger of an air conditioner, and the circulating heat exchanger is used to refrigerate the coolant, thereby ensuring that the temperature of the coolant in the main line 1 is at a low temperature. One end of the first sub-line 2 and the second sub-line 3 are both connected to the main line 1, and the other ends of the first sub-line 2 and the second sub-line 3 are both connected to a heat sink, such as a liquid cooling plate of a battery pack, so that the coolant after refrigeration by the circulating heat exchanger flows to the main line 1, and then flows to the liquid cooling plate of the battery pack through the first sub-line 2 and the second sub-line 3, thereby achieving heat dissipation of the battery pack.

[0043] The first sub-pipeline 2 and the second sub-pipeline 3 can be connected to different heat sinks, such as the liquid cooling plate of the battery pack, to reduce the temperature difference of the coolant entering different liquid cooling plates. Among them, the inner diameter of the second sub-pipeline 3 is relatively large, and the second sub-pipeline 3 is connected to the lower part of the main pipeline 1. At this time, the coolant flowing to the second sub-pipeline 3 has a relatively large flow rate under the action of gravity. The second sub-pipeline 3 with a larger inner diameter is conducive to decelerating and reducing the pressure of the coolant. The inner diameter of the first sub-pipeline 2 is relatively small, and the first sub-pipeline 2 is connected to the upper part of the main pipeline 1. The coolant flowing to the first sub-pipeline 2 has a relatively small flow rate under the action of gravity. The first sub-pipeline 2 with a smaller inner diameter is conducive to accelerating and pressurizing the coolant. As a result, the amount of coolant flowing to the heat sink through the first sub-pipeline 2 is basically the same as the amount of coolant flowing to the heat sink through the second sub-pipeline 3, that is, the coolant in the main pipeline 1 can be evenly distributed to the first sub-pipeline 2 and the second sub-pipeline 3.

[0044] Therefore, when the pipeline assembly 100 is applied to the energy storage device 200, by setting the first auxiliary pipeline 2 and the second auxiliary pipeline 3 with different inner diameters, the average flow distribution of the pipeline assembly 100 can be achieved, that is, the amount of coolant flowing to different heat sinks is basically the same, so as to ensure the heat dissipation efficiency of the energy storage device 200 while avoiding the local temperature of the energy storage device 200 being too high to affect normal use, thereby improving the use stability and safety of the energy storage device 200 and extending the service life of the energy storage device 200.

[0045] According to the pipeline assembly 100 of the embodiment of the utility model, by connecting the first auxiliary pipeline 2 and the second auxiliary pipeline 3 on the main pipeline 1, the second auxiliary pipeline 3 is located below the first auxiliary pipeline 2, and the inner diameter of the second auxiliary pipeline 3 is larger than the inner diameter of the first auxiliary pipeline 2. The coolant flowing to the second auxiliary pipeline 3 has a larger flow rate under the action of gravity, and the second auxiliary pipeline 3 with a larger inner diameter is conducive to decelerating and reducing the pressure of the coolant; the coolant flowing to the first auxiliary pipeline 2 has a smaller flow rate under the action of gravity, and the first auxiliary pipeline 2 with a smaller inner diameter is conducive to accelerating and pressurizing the coolant. In this way, the amount of coolant flowing to different heat sinks can be made basically consistent, so as to ensure the heat dissipation efficiency of the energy storage device 200 while avoiding the local temperature of the energy storage device 200 being too high to affect normal use, thereby improving the use stability and safety of the energy storage device 200 and extending the service life of the energy storage device 200.

[0046] According to some embodiments of the present invention, the inner diameter of the first auxiliary pipeline 2 is α, and the inner diameter of the second auxiliary pipeline 3 is β, wherein α and β respectively satisfy: 12.5mm≤α≤13.5mm, 17mm≤β≤18mm. When α<12.5mm and / or β<17mm, the inner diameter of the first sub-pipeline 2 and / or the inner diameter of the second sub-pipeline 3 is small, resulting in a large flow rate of the coolant through the first sub-pipeline 2 and / or the second sub-pipeline 3, which is not conducive to the average diversion of the pipeline assembly 100, reduces the cooling effect of the energy storage device 200, and affects the normal use of the battery pack. At the same time, the large flow rate increases the stress on the inner wall of the first sub-pipeline 2 and / or the second sub-pipeline 3, reducing the life of the first sub-pipeline 2 and / or the second sub-pipeline 3; when α>13.5mm and / or β>18mm, the inner diameter of the first sub-pipeline 2 and / or the inner diameter of the second sub-pipeline 3 is large, which will reduce the speed at which the coolant flows along the first sub-pipeline 2 and / or the second sub-pipeline 3 to the heat sink, thereby also reducing the heat dissipation effect of the heat sink. Therefore, by setting the inner diameter of the first sub-pipeline 2 and the inner diameter of the second sub-pipeline 3 to 12.5mm≤α≤13.5mm and 17mm≤β≤18mm respectively, the design of the first sub-pipeline 2 and the second sub-pipeline 3 is made more reasonable, that is, the coolant allocated to the first sub-pipeline 2 and the second sub-pipeline 3 is roughly the same, so that the temperatures of different heat dissipation plates, such as the liquid cooling plate of the battery pack, are roughly the same, thereby improving the operating stability of the energy storage device 200.

[0047] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , a first liquid port 111 is formed on the main pipeline 1, and the main pipeline 1 is connected to the circulating heat exchanger through the first liquid port 111, so that the coolant after the refrigeration treatment of the circulating heat exchanger flows to the main pipeline 1 through the first liquid port 111. The transmission path between the first sub-pipeline 2 and the first liquid port 111 is smaller than the transmission path between the second sub-pipeline 3 and the first liquid port 111. Among them, the transmission path between the first sub-pipeline 2 and the first liquid port 111 is the minimum distance between the first sub-pipeline 2 and the first liquid port 111; the transmission path between the second sub-pipeline 3 and the first liquid port 111 is the minimum distance between the second sub-pipeline 3 and the first liquid port 111. By making the minimum distance between the first sub-pipeline 2 and the first liquid port 111 smaller, the coolant can flow from the first sub-pipeline 2 to the liquid cold plate in time, and the flow rate of the coolant along the first sub-pipeline 2 can be slightly increased. Since the inner diameter of the second sub-pipeline 3 is larger, by making the minimum distance between the second sub-pipeline 3 and the first liquid port 111 larger, it is beneficial to reduce the flow rate difference of the coolant in the first sub-pipeline 2 and the second sub-pipeline 3, that is, the coolant can be evenly distributed to the first sub-pipeline 2 and the second sub-pipeline 3, thereby ensuring the heat dissipation consistency of multiple heat sinks, that is, ensuring the temperature uniformity of the energy storage device 200.

[0048] Furthermore, the first liquid port 111 is disposed adjacent to the middle of the main pipe 1. Figure 1 and Figure 2 The first liquid port 111 is formed at the middle position of the main pipeline 1 to reduce the distance between the first liquid port 111 and the first sub-pipeline 2 and the second sub-pipeline 3, thereby improving the efficiency of the coolant entering the first sub-pipeline 2 and the second sub-pipeline 3 and improving the heat dissipation efficiency of the heat sink.

[0049] Specifically, the coolant flowing out of the circulating heat exchanger can flow from the middle of the main line 1 (i.e., the first liquid port 111) into the main line 1, and then flow from the middle of the main line 1 to the first sub-line 2 and the second sub-line 3, respectively, and finally flow to different heat sinks, such as the liquid cooling plate of the battery pack, to dissipate heat for different battery packs. As a result, the coolant in the main line 1 can be better divided and flow to the first sub-line 2 and the second sub-line 3, so that the coolant in the pipeline assembly 100 is evenly distributed, ensuring the temperature uniformity of the energy storage device 200.

[0050] Furthermore, the main pipeline 1 includes a first pipe section 11 and a second pipe section 12 connected to each other, a first liquid port 111 is formed on the first pipe section 11, the first pipe section 11 is connected to the first auxiliary pipeline 2, and the second pipe section 12 is connected to the second auxiliary pipeline 3. Thus, the main pipeline 1 is configured as a two-section type, which reduces the length of the first pipe section 11 and the second pipe section 12, reduces the difficulty of processing and transportation of the main pipeline 1, and when the first pipe section 11 or the second pipe section 12 is damaged, only the first pipe section 11 or the second pipe section 12 needs to be replaced, which reduces the maintenance cost of the main pipeline 1 and increases the service life of the main pipeline 1.

[0051] The length of the first pipe section 11 is greater than the length of the second pipe section 12. Therefore, while satisfying that the distance between the first liquid port 111 and the first auxiliary pipeline 2 is less than the distance between the first liquid port 111 and the second auxiliary pipeline 3, it is helpful to adjust the position of the first liquid port 111 on the first pipe section 11 to adjust the distance between the first liquid port 111 and the first auxiliary pipeline 2, thereby adjusting the flow rate of the coolant in the first auxiliary pipeline 2 and the second auxiliary pipeline 3, so that the flow rate of the coolant in the first auxiliary pipeline 2 and the second auxiliary pipeline 3 can meet the requirement of average flow distribution of the pipeline assembly 100.

[0052] In addition, if Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, a first connector 112 is provided at the end of the first pipe segment 11, and a second connector 121 is provided at the end of the second pipe segment 12. The first connector 112 and the second connector 121 are threadedly connected to achieve the connection between the first pipe segment 11 and the second pipe segment 12. For example, an external thread can be provided on the first connector 112, and an internal thread can be provided on the second connector 121. The internal thread and the external thread cooperate with each other to achieve the connection between the first pipe segment 11 and the second pipe segment 12. Among them, thread locking has the advantage of good locking performance, which is conducive to improving the connection stability and sealing of the first pipe segment 11 and the second pipe segment 12, thereby improving the overall stability of the main pipe 1. At the same time, the first connector 112 and the second connector 121 can be repeatedly disassembled, which reduces the difficulty of installation and maintenance of the main pipe 1.

[0053] Furthermore, there are multiple first auxiliary pipelines 2 and multiple second auxiliary pipelines 3, multiple first auxiliary pipelines 2 are spaced apart along the axial direction of the first pipe section 11, and multiple second auxiliary pipelines 3 are spaced apart along the axial direction of the second pipe section 12. Figure 1-Figure 5 As shown, two first auxiliary pipelines 2 are provided in the axial direction of the first pipe section 11, and two second auxiliary pipelines 3 are provided in the axial direction of the second pipe section 12, so that the pipeline assembly 100 can dissipate heat for multiple heat sinks at the same time, further improving the temperature uniformity of the energy storage device 200.

[0054] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , the pipeline assembly 100 also includes a third auxiliary pipeline 4, a first branch pipeline 5 and a control valve 6. The main pipeline 1 is connected to the circulating heat exchanger through the third auxiliary pipeline 4. One end of the first branch pipeline 5 is connected to the third auxiliary pipeline 4, and the other end of the first branch pipeline 5 is suitable for connecting to the circulating heat exchanger. In other words, one end of the third auxiliary pipeline 4 is connected to the main pipeline 1, and the other end of the third auxiliary pipeline 4 is connected to the first branch pipeline 5. The end of the first branch pipeline 5 away from the third auxiliary pipeline 4 is connected to the circulating heat exchanger, so that the coolant after the refrigeration treatment of the circulating heat exchanger passes through the first branch pipeline 5 and enters the main pipeline 1 along the third auxiliary pipeline 4, that is, the first branch pipeline 5 and the third auxiliary pipeline 4 are combined to allow the coolant to flow from the circulating heat exchanger to the main pipeline 1.

[0055] The control valve 6 is arranged between the first branch pipeline 5 and the third auxiliary pipeline 4, and the control valve 6 is used to adjust the flow rate of the coolant between the circulating heat exchanger and the third auxiliary pipeline 4, so as to avoid excessive pressure in the first branch pipeline 5 when the flow rate is large, affecting the stability of the use of the first branch pipeline 5, and to avoid high pressure at the connection between the first branch pipeline 5 and the third auxiliary pipeline 4, resulting in water leakage at the connection, thereby improving the sealing of the connection between the first branch pipeline 5 and the third auxiliary pipeline 4. At the same time, the control valve 6 can also be used to stop the flow of the coolant between the circulating heat exchanger and the main pipeline 1, so as to facilitate the user to perform maintenance and other operations.

[0056] Among them, the first branch pipeline 5 can be a deformable hose, so that the first branch pipeline 5 can be flexibly adapted to various installation spaces between the main pipeline 1 and the circulating heat exchanger, avoiding the third sub-pipeline 4 from being too long and interfering with other components, thereby improving the applicability of the pipeline assembly 100. At the same time, the flexibility of the first branch pipeline 5 can also be used to adjust the position of the control valve 6 to avoid interference between the control valve 6 and other components, thereby improving the applicability of the pipeline assembly 100.

[0057] According to some embodiments of the utility model, an exhaust valve 13 is provided at one end of the main line 1 in the length direction. Since some air is dissolved in the coolant, after the pipeline assembly 100 is used for a long time, the solubility of air decreases with the increase of temperature, so that the air is gradually separated from the coolant during the circulation of the coolant and accumulated in the main line 1. By providing an exhaust valve 13 at one end of the main line 1 in the length direction, the user can adjust the exhaust valve 13 to exhaust the air in the main line 1, so as to improve the flow stability of the coolant, reduce the energy loss caused by the formation of air resistance in the main line 1, and prevent the pipeline assembly 100 from vibrating due to negative pressure when the pipeline assembly 100 is not in operation.

[0058] According to other embodiments of the utility model, the pipeline assembly 100 also includes a drain pipe 7 and a stop valve 8. The drain pipe 7 is connected to one end of the main pipeline 1 in the length direction. The stop valve 8 is arranged at the end of the drain pipe 7 away from the main pipeline 1. When the stop valve 8 is opened, the inside of the main pipeline 1 can be connected to the outside, so that the coolant in the pipeline assembly 100 is discharged along the drain pipe 7; when the stop valve 8 is closed, the stop valve 8 can block the end of the drain pipe 7 away from the main pipeline 1, so that the coolant in the main pipeline 1 cannot flow out to the outside, thereby ensuring the operation stability of the pipeline assembly 100. In addition, the liquid in the entire pipeline assembly 100 can be discharged to the outside through the drain pipe 7, which improves the convenience of drainage and facilitates the maintenance of the pipeline assembly 100.

[0059] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 The pipeline assembly 100 further includes at least one second branch pipeline 9 and at least one third branch pipeline 101. One end of the second branch pipeline 9 is connected to the first auxiliary pipeline 2, and the other end of the second branch pipeline 9 is suitable for connecting to the heat sink. One end of the third branch pipeline 101 is connected to the second auxiliary pipeline 3, and the other end of the third branch pipeline 101 is suitable for connecting to the heat sink. In this way, the first auxiliary pipeline 2 and the second auxiliary pipeline 3 are connected to the heat sink, so that the coolant in the main pipeline 1 can flow to different heat sinks.

[0060] Furthermore, the second branch pipeline 9 and the third branch pipeline 101 are both bellows. Among them, the bellows has the advantages of thin wall, high sensitivity and high pressure resistance, and the bellows also has certain anti-vibration performance. Therefore, the use of bellows as the second branch pipeline 9 and the third branch pipeline 101 reduces the weight of the second branch pipeline 9 and the third branch pipeline 101, improves the installation efficiency of the second branch pipeline 9 and the third branch pipeline 101, and avoids the occurrence of problems such as water leakage in the second branch pipeline 9 and the third branch pipeline 101 caused by thermal expansion and contraction of the coolant during use.

[0061] Among them, by utilizing the flexibility of the second branch pipeline 9, the second branch pipeline 9 can be deformed to adapt to the space between the first sub-pipeline 2 and the heat sink, thereby improving the connection efficiency between the first sub-pipeline 2 and the heat sink, and increasing the applicability of the pipeline assembly 100; by utilizing the flexibility of the third branch pipeline 101, the third branch pipeline 101 can be deformed to adapt to the space between the second sub-pipeline 3 and the heat sink, thereby improving the connection efficiency between the second sub-pipeline 3 and the heat sink, and further increasing the applicability of the pipeline assembly 100.

[0062] In addition, there are multiple second branch pipelines 9 and multiple third branch pipelines 101, and the multiple second branch pipelines 9 and the multiple third branch pipelines 101 are spaced apart along the axial direction of the main pipeline 1. Figure 1-Figure 5 As shown, two second branch pipelines 9 and two third branch pipelines 101 are provided in the axial direction of the main pipeline 1 to increase the number of communication paths between the main pipeline 1 and a heat sink such as a liquid cooling plate, thereby further improving the temperature uniformity of the energy storage device 200 .

[0063] According to some specific embodiments of the present invention, the second branch pipeline 9 includes a first sub-main pipeline 91 and a plurality of first sub-sub-pipes 92, the first sub-main pipeline 91 is connected to the first sub-pipe 2, one end of each first sub-sub-pipe 92 is connected to the first sub-main pipeline 91, and the other end of each first sub-sub-pipe 92 is connected to the heat sink. Figure 1 , Figure 2 , Figure 5 and Fig. 9 In the example, three first sub-pipes 92 are connected to the first sub-main pipe 91. After the coolant flows along the first sub-pipeline 2 to the first sub-main pipe 91, it can be roughly evenly distributed to the three first sub-pipes 92. The coolant flows along the three first sub-pipes 92 to the heat sink, increasing the amount of coolant in the heat sink to achieve rapid heat dissipation of the battery pack.

[0064] Similarly, the third branch pipeline 101 includes a second sub-main pipeline 1011 and a plurality of second sub-pipes 1012. The second sub-main pipeline 1011 is connected to the second sub-pipe 3. One end of each second sub-pipe 1012 is connected to the second sub-main pipeline 1011, and the other end of each second sub-pipe 1012 is connected to the heat sink. Figure 1 , Figure 2 , Figure 5 and Fig. 9 In the example, three second sub-pipes 1012 are connected to the second sub-main pipe 1011. After the coolant flows along the first sub-pipeline 2 to the second sub-main pipe 1011, it can be roughly evenly distributed to the three second sub-pipes 1012. The coolant flows along the three second sub-pipes 1012 to the heat sink, increasing the amount of coolant in the heat sink to achieve rapid heat dissipation of the battery pack.

[0065] According to some embodiments of the present invention, the pipeline assembly 100 further includes a heat-insulating member, which is disposed on the outer peripheral surface of the main pipeline 1. That is, the heat-insulating member can be coated on the outer peripheral surface of the main pipeline 1 to reduce the heat loss of the coolant in the main pipeline 1 and reduce the influence of the external environment on the coolant in the main pipeline 1.

[0066] The thermal insulation layer may be thermal insulation cotton, but is not limited thereto.

[0067] According to the energy storage device 200 of the second embodiment of the utility model, refer to Figure 3-Figure 9 , including multiple pipeline assemblies 100. In the description of the present utility model, "multiple" means two or more. Multiple pipeline assemblies 100 include a liquid inlet pipeline assembly 202 and a liquid outlet pipeline assembly 203, the main pipeline 1 of the liquid inlet pipeline assembly 202 is connected to the liquid outlet of the circulation heat exchanger, and the first sub-pipeline 2 and the second sub-pipeline 3 of the liquid inlet pipeline assembly 202 are connected to the liquid inlets of multiple heat sinks; the main pipeline 1 of the liquid outlet pipeline assembly 203 is connected to the liquid inlet of the circulation heat exchanger, and the first sub-pipeline 2 and the second sub-pipeline 3 of the liquid outlet pipeline assembly 203 are connected to the liquid outlets of multiple heat sinks.

[0068] That is to say, the coolant flows from the liquid outlet of the circulating heat exchanger into the main line 1 of the liquid inlet pipeline assembly 202, and then enters different heat sinks, such as the liquid cooling plate of the battery pack, along the first sub-pipeline 2 and the second sub-pipeline 3 of the liquid inlet pipeline assembly 202 respectively. The coolant flows in the heat sink to exchange heat with the heat generated by the battery pack, and then the coolant with a higher temperature enters the liquid inlet of the circulating heat exchanger along the first sub-pipeline 2, the second sub-pipeline 3 and the main line 1 of the liquid outlet pipeline assembly 203. The coolant is re-cooled in the circulating heat exchanger and then enters the liquid inlet pipeline assembly 202, thereby forming a cooling cycle for the energy storage device 200, meeting the heat dissipation requirements of the battery pack, and improving the operating stability of the energy storage device 200.

[0069] According to the energy storage device 200 of the embodiment of the utility model, by adopting the above-mentioned pipeline assembly 100, the coolant circulates along the circulating heat exchanger, the liquid inlet pipeline assembly 202, the heat sink and the liquid outlet pipeline assembly 203 to meet the heat dissipation requirements of the energy storage device 200, make the temperature of the energy storage device 200 more uniform, and improve the operating stability of the energy storage device 200.

[0070] Furthermore, the first branch pipe 5 of the inlet pipe assembly 202 is connected to the liquid outlet of the circulating heat exchanger, and the second branch pipe 9 and the third branch pipe 101 of the inlet pipe assembly 202 are connected to the liquid inlet of the heat sink. The first branch pipe 5 of the outlet pipe assembly 203 is connected to the liquid inlet of the circulating heat exchanger, and the second branch pipe 9 and the third branch pipe 101 of the outlet pipe assembly 203 are connected to the liquid outlet of the heat sink.

[0071] The coolant in the circulating heat exchanger flows out from the liquid outlet, enters the main line 1 of the liquid inlet line assembly 202 along the first branch line 5 and the third branch line 4 of the liquid inlet line assembly 202, and then flows to the heat sink such as the liquid cooling plate of the battery pack through the first branch line 2, the second branch line 3, the second branch line 9 and the third branch line 101 of the liquid inlet line assembly 202. The coolant exchanges heat with the heat generated by the battery pack during the flow process. The coolant with a higher temperature enters the main line 1 of the liquid outlet line assembly 203 from the liquid outlet of the liquid cooling plate along the second branch line 9, the third branch line 101, the first branch line 2 and the second branch line 3 of the liquid outlet line assembly 203, and then enters the circulating heat exchanger along the third branch line 4 and the first branch line 5 of the liquid outlet line assembly 203 for re-cooling. Thus, a circulating refrigeration circuit is formed in the energy storage device 200 to achieve heat dissipation of the energy storage device 200.

[0072] Furthermore, refer to Figure 3-Figure 9 , including a cabinet 201, an air conditioner and a plurality of battery packs. In the description of the utility model, "plurality" means two or more. A partition 2011 is provided in the cabinet 201, and the partition 2011 separates the interior of the cabinet 201 into a first accommodating cavity 2012 and a second accommodating cavity 2013. The first accommodating cavity 2012 and the second accommodating cavity 2013 are arranged along the thickness direction of the cabinet 201 (for example, Figure 5 The air conditioner can be arranged in the first accommodating chamber 2012. Multiple battery packs are arranged in the second accommodating chamber 2013, and the multiple battery packs are arranged along the height direction of the cabinet 201. The pipeline assembly 100 is the pipeline assembly 100 according to the embodiment of the first aspect of the utility model.

[0073] A partition 2011 is provided in the thickness direction of the cabinet 201. The partition 2011 is provided along the length direction of the cabinet 201 (for example, Figure 5The partition 2011 extends in the vertical direction of the partition 2011 to separate the interior of the cabinet 201 into a first accommodating chamber 2012 and a second accommodating chamber 2013. An air conditioner is arranged in the first accommodating chamber 2012, and a plurality of battery packs are arranged in the second accommodating chamber 2013. The battery packs can supply power to the air conditioner to enable the air conditioner to operate normally, and the battery packs can output power to supply power to electrical devices connected to the energy storage device 200. The air conditioner and the battery packs are arranged on both sides of the partition 2011 to prevent condensed water generated on the heat exchanger of the air conditioner from flowing into the battery pack, thereby increasing the electrical safety of the energy storage device 200.

[0074] By arranging multiple battery packs along the height direction of the cabinet 201, the arrangement direction of the battery packs is consistent with the direction of the pipeline assembly 100, thereby reducing the connection distance between each battery pack and the pipeline assembly 100, which is beneficial to the connection between the pipeline assembly 100 and the liquid cooling plate of the battery pack.

[0075] In addition, refer to Figure 5 and Figure 6 A transverse plate 204 is also provided in the first accommodating cavity 2012 to separate the first accommodating cavity 2012 into two parts arranged in the vertical direction, and the first pipe section 11 and the second pipe section 12 are respectively provided on both sides of the transverse plate 204. A through hole is formed on the transverse plate 204, one of the first connecting member 112 and the second connecting member 121 is provided with an external thread, and the other of the first connecting member 112 and the second connecting member 121 is provided with an internal thread. After the sealing ring is installed on the first connecting member 112 or the second connecting member 121 provided with the external thread, the first connecting member 112 or the second connecting member 121 is passed through the through hole, and the first connecting member 112 or the second connecting member 121 provided with the internal thread is used on the other side of the transverse plate 204 to fix and lock, so that the sealing ring is pressed on the transverse plate 204, thereby increasing the installation stability of the pipeline assembly 100 on the cabinet 201. Therefore, compared with the traditional energy storage device, the use of pipe clamps is reduced, thereby simplifying the structure of the energy storage device 200.

[0076] The diameter of the through hole is larger than the outer diameter of the main pipe 1 , so as to offset the manufacturing tolerance in the production process of the main pipe 1 , thereby enhancing the assembly efficiency of the pipe assembly 100 .

[0077] The main pipeline 1 and the third sub-pipeline 4 of each pipeline assembly 100 are located in the first accommodating chamber 2012, and the second branch pipeline 9 and the third branch pipeline 101 of each pipeline assembly 100 are located in the second accommodating chamber 2013. The main pipeline 1, the third sub-pipeline 4 and the heat exchanger are arranged in the first accommodating chamber 2012, and are separated from the battery pack by the partition 2011 to prevent the condensed water on the main pipeline 1 and the third sub-pipeline 4 from flowing into the battery pack, thereby effectively enhancing the electrical safety of the energy storage device 200. The second branch pipeline 9 and the third branch pipeline 101 are in the second accommodating chamber 2013, which facilitates the second branch pipeline 9 and the third branch pipeline 101 to turn according to the position of the battery pack in the second accommodating chamber 2013, so as to improve the installation efficiency of the second branch pipeline 9 and the third branch pipeline 101 in the second accommodating chamber 2013, and at the same time increase the space utilization rate in the second accommodating chamber 2013.

[0078] Optionally, refer to Figure 7 A through hole is formed on the partition 2011, and an external thread is provided in the circumferential direction of the ends of the first auxiliary pipeline 2 and the second auxiliary pipeline 3 away from the main pipeline 1. After a sealing ring is installed outside the external thread, the first auxiliary pipeline 2 and the second auxiliary pipeline 3 are passed through the through hole, and a nut is used to fix and lock the other side of the partition 2011, so that the sealing ring is pressed against the partition 2011, further increasing the installation stability of the pipeline assembly 100 on the cabinet 201. Therefore, compared with the traditional energy storage device, the use of pipe clamps is reduced, thereby simplifying the structure of the energy storage device 200.

[0079] Other structures and operations of the pipeline assembly 100 and the energy storage device 200 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0080] In the description of the present invention, it should be understood that the terms "center", "length", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0081] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0083] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pipeline assembly, characterized in that: include: A main pipe, the main pipe extending in the up-down direction, the main pipe being suitable for connecting to the circulation heat exchanger; at least one first auxiliary pipeline, one end of the first auxiliary pipeline is connected to the main pipeline, and the other end of the first auxiliary pipeline is suitable for being connected to the heat sink; at least one second auxiliary pipeline, one end of the second auxiliary pipeline is connected to the main pipeline, and the other end of the second auxiliary pipeline is suitable for being connected to the heat sink, The second auxiliary pipeline is located below the first auxiliary pipeline, and the inner diameter of the second auxiliary pipeline is larger than the inner diameter of the first auxiliary pipeline.

2. The pipeline assembly according to claim 1, characterized in that: The inner diameter of the first auxiliary pipeline is α, and the inner diameter of the second auxiliary pipeline is β, wherein α and β respectively satisfy: 12.5 mm≤α≤13.5 mm, 17 mm≤β≤18 mm.

3. The pipeline assembly according to claim 1, characterized in that: A first liquid port is formed on the main pipe, and the main pipe is connected to the circulation heat exchanger through the first liquid port; A transmission path between the first sub-pipeline and the first liquid port is smaller than a transmission path between the second sub-pipeline and the first liquid port.

4. The pipeline assembly according to claim 3, characterized in that: The first liquid port is disposed adjacent to the middle portion of the main pipe.

5. The pipeline assembly according to claim 4, characterized in that: The main pipeline includes a first pipe section and a second pipe section connected to each other, the first pipe section is formed with the first liquid port, the first pipe section is connected to the first auxiliary pipeline, and the second pipe section is connected to the second auxiliary pipeline; Wherein, the length of the first pipe section is greater than the length of the second pipe section.

6. The pipeline assembly according to claim 5, characterized in that: A first connecting piece is disposed at the end of the first pipe segment, and a second connecting piece is disposed at the end of the second pipe segment. The first connecting piece and the second connecting piece are threadedly connected to realize the connection between the first pipe segment and the second pipe segment.

7. The pipeline assembly according to claim 6, characterized in that: There are a plurality of the first auxiliary pipelines and a plurality of the second auxiliary pipelines, the plurality of the first auxiliary pipelines are spaced apart from each other along the axial direction of the first pipe segment, and the plurality of the second auxiliary pipelines are spaced apart from each other along the axial direction of the second pipe segment.

8. The pipeline assembly according to claim 1, characterized in that: Also includes: a third auxiliary pipeline, the main pipeline is connected to the circulation heat exchanger through the third auxiliary pipeline; a first branch pipeline, one end of which is connected to the third auxiliary pipeline, and the other end of which is suitable for being connected to the circulating heat exchanger; A control valve is provided between the first branch pipeline and the third auxiliary pipeline.

9. The pipeline assembly according to any one of claims 1 to 8, characterized in that: An exhaust valve is provided at one end of the main pipe in the length direction.

10. The pipeline assembly according to any one of claims 1 to 8, characterized in that: Also includes: a liquid discharge pipe connected to one end of the main pipe in the length direction; A stop valve is arranged at one end of the discharge pipe away from the main pipe.

11. The pipeline assembly according to any one of claims 1 to 8, characterized in that: Also includes: at least one second branch pipeline, one end of the second branch pipeline is connected to the first auxiliary pipeline, and the other end of the second branch pipeline is suitable for being connected to the heat sink; At least one third branch pipeline, one end of the third branch pipeline is connected to the second auxiliary pipeline, and the other end of the third branch pipeline is suitable for being connected to the heat sink.

12. The pipeline assembly according to claim 11, characterized in that: The second branch pipeline and the third branch pipeline are both corrugated pipes.

13. The pipeline assembly according to claim 11, characterized in that: There are a plurality of the second branch pipelines and a plurality of the third branch pipelines, and the plurality of the second branch pipelines and the plurality of the third branch pipelines are spaced apart from each other along the axial direction of the main pipeline.

14. The pipeline assembly according to claim 11, characterized in that: The second branch pipeline includes a first sub-main pipeline and a plurality of first sub-sub-pipes, the first sub-main pipeline is connected to the first sub-pipe, one end of each of the first sub-sub-pipes is connected to the first sub-main pipeline, and the other end of each of the first sub-sub-pipes is connected to the heat sink; The third branch pipeline includes a second sub-main pipeline and a plurality of second sub-sub-pipes, the second sub-main pipeline is connected to the second sub-pipe, one end of each of the second sub-sub-pipes is connected to the second sub-main pipeline, and the other end of each of the second sub-sub-pipes is connected to the heat sink.

15. The pipeline assembly according to any one of claims 1 to 8, characterized in that: Also includes: A heat-insulating component is arranged on the outer peripheral surface of the main pipe.

16. An energy storage device, characterized in that: include: A plurality of pipeline assemblies, wherein the pipeline assembly is a pipeline assembly according to any one of claims 1 to 15; Among them, the multiple pipeline assemblies include an inlet pipeline assembly and an outlet pipeline assembly, the main pipeline of the inlet pipeline assembly is connected to the liquid outlet of the circulation heat exchanger, and the first sub-pipeline and the second sub-pipeline of the inlet pipeline assembly are connected to the liquid inlets of the multiple heat sinks; the main pipeline of the outlet pipeline assembly is connected to the liquid inlet of the circulation heat exchanger, and the first sub-pipeline and the second sub-pipeline of the outlet pipeline assembly are connected to the liquid outlets of the multiple heat sinks.

17. The energy storage device according to claim 16, characterized in that: The first branch pipeline of the liquid inlet pipeline assembly is connected to the liquid outlet of the circulating heat exchanger, and the second branch pipeline and the third branch pipeline of the liquid inlet pipeline assembly are connected to the liquid inlet of the heat sink; The first branch pipeline of the liquid outlet pipeline assembly is connected to the liquid inlet of the circulating heat exchanger, and the second branch pipeline and the third branch pipeline of the liquid outlet pipeline assembly are connected to the liquid outlet of the heat sink.

18. The energy storage device according to claim 17, characterized in that: Also includes: A cabinet, wherein a partition is provided in the cabinet, wherein the partition separates the interior of the cabinet into a first accommodating cavity and a second accommodating cavity, wherein the first accommodating cavity and the second accommodating cavity are arranged along a thickness direction of the cabinet; Wherein, the main pipeline and the third sub-pipeline of each pipeline assembly are located in the first accommodating chamber, and the second branch pipeline and the third branch pipeline of each pipeline assembly are located in the second accommodating chamber.

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