Liquid cooling pipe system

Abstract

The application provides a liquid cooling pipeline system, which comprises at least two cooling circulation units, and a first drainage valve and a water inlet valve are arranged between a secondary water inlet pipe and a primary water inlet pipe of each cooling circulation unit. When a corresponding battery cluster of a certain cooling module fails, the corresponding water inlet valve and water outlet valve are closed first, so that the corresponding cooling circulation unit no longer has cooling liquid flowing in, and then the corresponding first drainage valve is opened, so that the cooling liquid in the corresponding secondary water inlet pipe and cooling module can be drained. During the maintenance process, only the cooling liquid in the secondary water inlet pipe and the cooling module corresponding to the failed battery cluster needs to be drained, and the remaining cooling circulation units can still normally circulate the cooling liquid, which does not affect the use of the remaining normal battery clusters. After the maintenance is completed, only the cooling liquid of the cooling circulation unit and the cooling module corresponding to the failed battery cluster needs to be added, so that the maintenance efficiency is higher and the use of the normal battery clusters is not affected during the maintenance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline systems, in particular to a liquid cooling pipeline system. BACKGROUND

[0002] In the existing system, the energy storage system includes a liquid cooling pipeline system, a battery system, a refrigeration water machine, a power distribution cabinet and a container, wherein the liquid cooling pipeline system is a bridge connecting each battery cluster of the battery system and the refrigeration water machine. The battery system is the core of the entire energy storage system, which realizes the storage and release of energy. In this process, the liquid cooling pipeline system is responsible for the heat transfer exchange of the heat generated by the battery cluster.

[0003] The key core component of the liquid cooling pipeline system is the pipeline. The layout of the pipeline needs to consider the convenience of installation and maintenance, especially when the battery cluster needs to be repaired. At this time, how to minimize the impact of the entire energy storage system needs to be considered.

[0004] In the process of implementing the present application, the inventors have found at least the following problems in the prior art:

[0005] At present, the existing liquid cooling pipeline system connects all battery clusters in series through a circulating pipeline. When any battery cluster needs to be repaired due to failure, the entire liquid cooling pipeline system and the cooling liquid in the battery system need to be completely emptied before the corresponding battery cluster can be repaired. After the repair is completed, the entire liquid cooling pipeline system needs to be refilled with cooling liquid. The entire process is complicated, time-consuming and labor-intensive, and the repair efficiency is low. Moreover, when repairing, the cooling liquid in the entire liquid cooling pipeline system is completely emptied, which seriously affects the use of normal battery clusters. SUMMARY

[0006] Based on this, the present application provides a liquid cooling pipeline system with higher repair efficiency and without affecting the use of normal battery clusters during repair.

[0007] To achieve the above-mentioned purpose, the technical scheme of the embodiments of the present application is as follows:

[0008] The embodiments of the present application provide a liquid cooling pipeline system, which comprises:

[0009] A first water inlet pipe, which can be connected to a liquid cooling source, wherein the liquid cooling source can provide low-temperature cooling liquid to the first water inlet pipe;

[0010] A first water outlet pipe, which can be connected to the liquid cooling source, and high-temperature cooling liquid can flow back to the liquid cooling source from the first water outlet pipe; and

[0011] at least two cooling circulation units, each of the cooling circulation units respectively comprising a secondary water inlet pipe and a secondary water outlet pipe; the secondary water inlet pipe is connected to the primary water inlet pipe, and at least one water outlet interface is arranged on the secondary water inlet pipe, the water outlet interface being used for connecting with a cooling module of a battery cluster, and the low-temperature cooling liquid flows into the corresponding cooling module after sequentially passing through the primary water inlet pipe and the secondary water inlet pipe; the secondary water outlet pipe is connected to the primary water outlet pipe, and at least one water inlet interface is arranged on the secondary water outlet pipe, the water inlet interface being used for connecting with the cooling module, and the low-temperature cooling liquid in the cooling module is converted into the high-temperature cooling liquid after absorbing heat, and then flows back to the liquid cooling source after sequentially passing through the secondary water outlet pipe and the primary water outlet pipe;

[0012] The first water inlet valve and the first liquid discharge valve are sequentially connected between the primary water inlet pipe and each of the secondary water inlet pipes in the liquid flow direction, the first water inlet valve being used for controlling the conduction or cutoff between the primary water inlet pipe and the corresponding secondary water inlet pipe, and the first liquid discharge valve being used for emptying the cooling liquid in the corresponding cooling circulation unit and the cooling module.

[0013] The water outlet valve is connected between each of the secondary water outlet pipes and the primary water outlet pipe, and the water outlet valve is used for controlling the conduction or cutoff between the primary water outlet pipe and the corresponding secondary water outlet pipe.

[0014] In one of the embodiments, each of the cooling circulation units further respectively comprises a tertiary water inlet pipe and a tertiary water outlet pipe; each of the water outlet interfaces is respectively connected to one of the tertiary water inlet pipes, one end of each of the tertiary water inlet pipes being connected to the corresponding water outlet interface, and the other end of each of the tertiary water inlet pipes being used for connecting with a water inlet end of one of the cooling modules; each of the water inlet interfaces is respectively connected to one of the tertiary water outlet pipes, one end of each of the tertiary water outlet pipes being connected to the corresponding water inlet interface, and the other end of each of the tertiary water outlet pipes being used for connecting with a water outlet end of one of the cooling modules.

[0015] In one of the embodiments, the primary water inlet pipe and the primary water outlet pipe are arranged in the horizontal direction, the secondary water inlet pipe and the secondary water outlet pipe are arranged in the vertical direction, and the bottom ends of the primary water inlet pipe and the secondary water inlet pipe are communicated, and the bottom ends of the primary water outlet pipe and the secondary water outlet pipe are communicated; the second liquid discharge valve is respectively connected between the bottom end of the secondary water outlet pipe and the corresponding water outlet valve in each of the cooling circulation units.

[0016] In one of the embodiments, the first and second liquid discharge valves each comprise a valve body, a button, a compression spring piece, a valve core, an elastic return member and a compression block; the valve body is provided with an inner cavity, and the button, the compression spring piece, the valve core and the compression block are sequentially arranged in the inner cavity of the valve body; the button comprises an abutting portion and a pressing portion, the abutting portion is arranged in the inner cavity, and the pressing portion is arranged outside the inner cavity; the compression spring piece comprises a plurality of elastic pieces distributed in a circumferential direction, and the abutting portion is used to open the elastic pieces in a circumferential direction; the compression block is sealed at an end portion of the inner cavity of the valve body; the valve core comprises a valve core body and a valve rod, the valve core body is arranged towards the button, and an end portion of the valve rod is exposed outside the inner cavity; and the elastic return member is used to move the valve core to be close to the button and reset.

[0017] In one of the embodiments, a mounting groove is arranged in a circumferential direction at a connection portion of the valve core body and the valve rod, one end of the elastic return member is arranged in the mounting groove, and the other end of the elastic return member abuts against an inner wall of an end portion of the compression block and / or the valve body.

[0018] In one of the embodiments, the first and second liquid discharge valves further comprise a compression ring and a first sealing ring arranged in the inner cavity of the valve body, the compression ring and the first sealing ring are arranged in the inner cavity between the valve core and the compression spring piece, and the first sealing ring is arranged close to the valve core.

[0019] In one of the embodiments, an inner diameter of the first sealing ring gradually increases from a side close to the valve core to a side away from the valve core; a fitting groove is arranged on a side of the first sealing ring close to the compression ring, the first sealing ring and the compression ring are matched through the fitting groove; and an annular groove is arranged on a wall surface of the first sealing ring close to the valve core.

[0020] In one of the embodiments, the first and second liquid discharge valves further comprise a second sealing ring and a third sealing ring, the second sealing ring is arranged between the valve core body and an inner cavity wall surface of the valve body, and the third sealing ring is used to seal a matching portion between the valve body and the secondary water inlet pipe or between the valve body and the secondary water outlet pipe.

[0021] In one of the embodiments, a plurality of liquid inlet holes are arranged on a side wall of the valve body on a side of the compression block, and the liquid inlet holes are in communication with the inner cavity of the valve body.

[0022] In one of the embodiments, the liquid cooling pipeline system further comprises a conversion cap, the conversion cap comprising a blocking part and a conducting part; the blocking part is used to block the inner cavity port of the valve body when the first liquid discharge valve or the second liquid discharge valve is in the sealing state; the conducting part is used to be inserted into the inner cavity of the valve body from the side of the button when the first liquid discharge valve or the second liquid discharge valve needs to discharge liquid, and the valve core is in the conducting state by applying a pushing force to the valve core, so that the liquid can be discharged from the side of the conducting part.

[0023] In one of the embodiments, the liquid cooling pipeline system further comprises a liquid discharge pipe, which is used to be inserted into the inner cavity of the valve body from the side of the button, and the valve core is in the conducting state by applying a pushing force to the valve core.

[0024] Compared with the prior art, the liquid cooling pipeline system provided by the application has at least the following beneficial effects:

[0025] The liquid cooling pipeline system provided by the application comprises at least two cooling circulation units, and a first liquid discharge valve and a water inlet valve are arranged between the secondary water inlet pipe and the primary water inlet pipe of each cooling circulation unit. When a battery cluster corresponding to a certain cooling module fails, the corresponding water inlet valve and water outlet valve are first closed, so that the cooling liquid no longer flows into the corresponding cooling circulation unit. Then, the corresponding first liquid discharge valve is opened, so that the cooling liquid in the corresponding secondary water inlet pipe and cooling module can be emptied. Since the corresponding water outlet valve is also in the closed state during the liquid discharge process, the cooling liquid in the primary water outlet pipe cannot flow back into the corresponding secondary water outlet pipe and cooling module, so as to ensure that the cooling liquid in the corresponding secondary water inlet pipe and cooling module can be completely emptied, thereby facilitating the maintenance of the failed battery cluster. During the maintenance of the battery cluster, only the cooling liquid in the secondary water inlet pipe and the cooling module corresponding to the failed battery cluster needs to be emptied, and the remaining cooling circulation units can still normally circulate the cooling liquid. Therefore, the normal use of the remaining cooling circulation units is not affected, and the use of the remaining normal battery clusters is not affected. After the maintenance is completed, only the cooling liquid needs to be added to the cooling circulation unit and the cooling module corresponding to the failed battery cluster. During the entire maintenance process, the time required for adding and emptying the cooling liquid is greatly reduced, and the maintenance efficiency is improved.

[0026] In summary, the liquid cooling pipeline system provided by the application has higher maintenance efficiency and does not affect the use of normal battery clusters during maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the liquid cooling pipeline system of the embodiment of the application.

[0028] Figure 2 FIG. 6 is an enlarged schematic diagram of the structure at A of FIG. 5. Figure 1 FIG. 6 is an enlarged schematic diagram of the structure at A of FIG. 5.

[0029] Figure 3 The overall structure schematic diagram of the drain valve of the embodiment of the present application.

[0030] Figure 4 The cross-sectional structure schematic diagram of the drain valve of the embodiment of the present application. Figure 3

[0031] The structure and liquid flow direction schematic diagram when the drain pipe of the embodiment of the present application is inserted into the drain valve for draining. Figure 5

[0032] The installation structure schematic diagram of the sealing part of the conversion cap of the embodiment of the present application and the drain valve. Figure 6

[0033] The installation structure schematic diagram of the lead-through part of the conversion cap of the embodiment of the present application and the drain valve. Figure 7

[0034] The structure schematic diagram of the conversion cap of one embodiment of the present application. Figure 8 The meanings of the respective labels in the drawings are as follows:

[0035] 1, primary water inlet pipe; 2, cooling circulation unit; 3, third drain valve; 4, cooling module;

[0036] 21, secondary water outlet pipe; 22, tertiary water outlet pipe; 23, second drain valve; 24, first drain valve; 25, secondary water inlet pipe; 26, water outlet valve; 27, water inlet valve; 28, tertiary water inlet pipe; 31, compression spring sheet; 311, elastic sheet; 32, button; 321, pressing part; 322, abutting part; 33, zinc sleeve; 34, valve body; 341, external thread; 342, internal cavity; 343, third sealing ring groove; 344, liquid inlet hole; 35, compression ring; 36, first sealing ring; 361, assembly groove; 362, annular groove; 37, second sealing ring; 38, third sealing ring; 39, valve core; 391, valve core body; 392, valve rod; 393, installation groove; 301, elastic return member; 302, compression block; 303, drain pipe; 304, conversion cap; 3041, sealing part; 3042, flange part; 3043, lead-through part; 3044, liquid guide cavity.

[0037] DETAILED DESCRIPTION The technical solution of the present application is further described in detail below in combination with the drawings and specific embodiments of the present application.

[0038]

[0039] ​Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the ways in which this application may be implemented. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] In the description of this application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] Please see Figure 1 and Figure 2 This application provides a liquid-cooled piping system in one embodiment, which can be applied to an energy storage system, specifically for connecting the liquid cooling source and the battery system of the energy storage system. The liquid cooling source is, for example, a chiller (or water chiller unit), which provides low-temperature coolant. The battery system includes at least two battery clusters, each battery cluster having multiple cooling modules 4. The cooling module 4 is, for example, a liquid-cooled box, which can contain coolant. The energy storage batteries in the battery clusters are at least partially immersed in the cooling module 4, and heat exchange occurs between the coolant in the cooling module 4 and the energy storage batteries to meet the temperature control requirements of the energy storage batteries in the battery system. The liquid-cooled piping system of this embodiment includes:

[0043] The primary water inlet pipe 1 can be connected to a liquid cooling source (not shown), which can provide low-temperature coolant to the primary water inlet pipe 1.

[0044] A primary outlet pipe (not shown) can be used to connect to a liquid cooling source, allowing high-temperature coolant to flow back to the liquid cooling source.

[0045] At least two cooling circulation units 2 are connected in parallel between the primary water inlet pipe 1 and the primary water outlet pipe, the water inlet end of each cooling circulation unit 2 is communicated with the primary water inlet pipe 1, and the water outlet end of each cooling circulation unit 2 is communicated with the primary water outlet pipe, that is, each cooling circulation unit 2 is arranged in parallel between the primary water inlet pipe 1 and the primary water outlet pipe. It can be understood that the number of cooling circulation units 2 corresponds to the number of battery clusters. Specifically, each cooling circulation unit 2 comprises a secondary water inlet pipe 25 and a secondary water outlet pipe 21; the secondary water inlet pipe 25 is connected to the primary water inlet pipe 1, and the secondary water inlet pipe 25 is provided with at least one water outlet interface (not shown) for connecting with the cooling module 4 of a battery cluster, and the low-temperature cooling liquid flows into the corresponding cooling module 4 after sequentially passing through the primary water inlet pipe 1 and the secondary water inlet pipe 25; the secondary water outlet pipe 21 is connected to the primary water outlet pipe, and the secondary water outlet pipe 21 is provided with at least one water inlet interface (not shown) for connecting with the cooling module 4, and the low-temperature cooling liquid in the cooling module 4 is converted into high-temperature cooling liquid after absorbing heat, and then flows back to the liquid cooling source after sequentially passing through the secondary water outlet pipe 21 and the primary water outlet pipe, and the high-temperature cooling liquid is converted into low-temperature cooling liquid again under the action of the liquid cooling source.

[0046] The first water inlet valve 27 and the first drain valve 24 are connected in series between the primary water inlet pipe 1 and each secondary water inlet pipe 25 in the liquid flow direction, the first water inlet valve 27 is used for controlling the conduction or cut-off between the primary water inlet pipe 1 and the corresponding secondary water inlet pipe 25, and the first drain valve 24 is used for draining the cooling liquid in the corresponding cooling circulation unit 2 and the cooling module 4.

[0047] The water outlet valve 26 is connected in series between each secondary water outlet pipe 21 and the primary water outlet pipe, and the water outlet valve 26 is used for controlling the conduction or cut-off between the primary water outlet pipe and the corresponding secondary water outlet pipe 21.

[0048] As can be seen from the above, the liquid cooling pipeline system provided by the embodiment is applied to an energy storage system, first drain valves 24 and water inlet valves 27 are arranged between the secondary water inlet pipes 25 and the primary water inlet pipes 1 of each cooling circulation unit 2, when a battery cluster corresponding to a certain cooling module 4 fails, the corresponding water inlet valve 27 and the water outlet valve 26 are closed first, so that the cooling liquid no longer flows into the corresponding cooling circulation unit 2, and then the corresponding first drain valve 24 is opened, so that the cooling liquid in the corresponding secondary water inlet pipe 25 and the cooling module 4 is drained, since the corresponding water outlet valve 26 is also in the closed state during the draining process, the cooling liquid is prevented from flowing back from the primary water outlet pipe into the corresponding secondary water outlet pipe 21 and the cooling module 4, so as to ensure that the cooling liquid in the secondary water inlet pipe 25 of the corresponding cooling circulation unit 2 and the corresponding cooling module 4 can be completely drained, so as to facilitate the maintenance of the failed battery cluster. Since only the cooling liquid in the secondary water inlet pipe 25 and the cooling module 4 corresponding to the battery cluster to be maintained needs to be drained during the maintenance of the battery cluster, and the remaining cooling circulation units 2 can still normally circulate the cooling liquid, the normal use of the remaining cooling circulation units 2 is not affected, so that the use of the remaining normal battery clusters is not affected, and after the maintenance is completed, only the cooling liquid needs to be added to the cooling circulation unit 2 and the cooling module 4 corresponding to the failed battery cluster, and during the entire maintenance process, the time required for adding and draining the cooling liquid is greatly reduced, and the maintenance efficiency is improved.

[0049] In summary, the liquid cooling pipeline system provided by the embodiment has higher maintenance efficiency and does not affect the use of normal battery clusters during maintenance.

[0050] It can be understood that the liquid cooling pipeline system can also be applied to a liquid cooling system of a data center for connecting a liquid cooling source and a liquid cooling cabinet of the liquid cooling system, and the present application does not make specific description and special limitation thereto.

[0051] In the embodiment, as shown in Figure 1 and Figure 2 , the primary water inlet pipe 1 and the primary water outlet pipe are arranged in parallel along the horizontal direction at the bottom of the cooling circulation unit 2. The water inlet end of the primary water inlet pipe 1 can be used to connect with the liquid cooling source configured to provide low-temperature liquid (i.e. low-temperature cooling liquid), and the closed end of the primary water inlet pipe 1 is provided with a third drain valve 3, which can be opened to drain the liquid (cooling liquid) in the entire liquid cooling pipeline system when it is necessary to drain the entire liquid cooling pipeline system. The water outlet end of the primary water outlet pipe can be used to connect with the liquid cooling source, so that the cooling liquid in the liquid cooling pipeline system flows back to the liquid cooling source.

[0052] As shown in Figure 1 and Figure 2As shown, each cooling circulation unit 2 includes a secondary water inlet pipe 25, a tertiary water inlet pipe 28, a water inlet valve 27, a first drain valve 24, a secondary water outlet pipe 21, a tertiary water outlet pipe 22, a water outlet valve 26, and a second drain valve 23. The secondary water inlet pipe 25 and the secondary water outlet pipe 21 are arranged at intervals along the vertical direction.

[0053] The secondary inlet pipe 25 is provided with multiple outlet ports (not shown) at intervals. Each outlet port is connected to a tertiary inlet pipe 28. One end of each tertiary inlet pipe 28 is connected to the corresponding outlet port, and the other end can be connected to the inlet of a cooling module 4 to provide low-temperature coolant to each cooling module 4. The secondary outlet pipe 21 is provided with multiple inlet ports (not shown) at intervals. Each inlet port is connected to a tertiary outlet pipe 22. One end of each tertiary outlet pipe 22 is connected to the corresponding inlet port, and the other end can be connected to the outlet of a cooling module 4 to provide a coolant discharge channel for each cooling module 4. Thus, the high-temperature coolant can flow back to the liquid cooling source after passing through the tertiary outlet pipe 22, the secondary outlet pipe 21, and the primary outlet pipe in sequence.

[0054] The bottom of the secondary inlet pipe 25 is connected to the primary inlet pipe 1, and the bottom of the secondary outlet pipe 21 is connected to the primary outlet pipe. The secondary inlet pipe 25 can be directly connected to the primary inlet pipe 1, or it can be connected to the primary inlet pipe 1 via a bend, or the bottom of the secondary inlet pipe 25 can be bent before connecting to the primary inlet pipe 1. The connection between the secondary outlet pipe 21 and the primary outlet pipe is the same as described above. The inlet valve 27 and the first drain valve 24 are sequentially located at the bottom of the secondary inlet pipe 25, with the inlet valve 27 positioned closer to the primary inlet pipe 1. The outlet valve 26 and the second drain valve 23 are sequentially located at the bottom of the secondary outlet pipe 21, with the outlet valve 26 positioned closer to the primary outlet pipe. In each cooling circulation unit 2, the bottom end of the secondary outlet pipe 21 and the corresponding outlet valve 26 are connected in series with the second drain valve 23.

[0055] like Figure 2 As shown, in this embodiment, both the inlet valve 27 and the outlet valve 26 can be ball valves. When a battery cluster corresponding to a certain cooling module 4 malfunctions and needs repair, the inlet valve 27 and the outlet valve 26 are closed first, and then the first drain valve 24 and the second drain valve 23 are opened respectively to drain the coolant from the cooling circulation unit 2 and the corresponding cooling module 4. At this time, since the cooling circulation units 2 are connected in parallel, the other cooling circulation units 2 are not affected and can continue to work normally. It can be understood that when the cooling circulation unit 2 is equipped with the second drain valve 23, during drainage, the outlet valve 26 can be closed first to prevent the liquid in the first-stage outlet pipe from flowing back into the second-stage outlet pipe 21, and then the second drain valve 23 can be opened to drain the water in the second-stage outlet pipe 21 and the third-stage outlet pipe 22.

[0056] In the illustrated embodiment, the liquid cooling pipe system further comprises a drain pipe 303 and a conversion cap 304.

[0057] The structure of the drain valve between the primary water inlet pipe 1 and each secondary water inlet pipe 25, between each secondary water outlet pipe 21 and the primary water outlet pipe, and at the closed end of the primary water inlet pipe 1 is the same. As shown in the figure, each drain valve comprises a valve body 34, a button 32, a zinc sleeve 33, a compression spring piece 31, a compression ring 35, a first sealing ring 36, a valve core 39, an elastic return member 301, a pressing block 302, a second sealing ring 37, and a third sealing ring 38. Figure 4

[0058] The central part of the valve body 34 is provided with an inner cavity 342, which is used to accommodate various components of the drain valve and to form a flow passage for liquid. The outer wall of one end of the valve body 34 is provided with external threads 341, which are used to connect with the pipe. In order to facilitate the connection of the drain valve, a tee joint (not shown) can be provided on the corresponding pipe, and the valve body 34 is connected with the pipe through the tee joint. For example, a tee joint can be provided between the bottom end of the secondary water inlet pipe 25 and the water inlet valve 27, and the tee joint is connected with the secondary water inlet pipe 25, the water inlet valve 27, and the first drain valve 24, respectively. A tee joint can also be provided between the bottom end of the secondary water outlet pipe 21 and the water outlet valve 26, and the tee joint is connected with the secondary water outlet pipe 21, the water outlet valve 26, and the second drain valve 23, respectively. Alternatively, a threaded hole (not shown) can be directly provided on the pipe, and the external threads 341 of the valve body 34 are connected with the internal threads of the pipe. For example, a threaded hole can be provided on the secondary water inlet pipe 25 near the bottom end of the secondary water inlet pipe 25 and along the radial direction of the secondary water inlet pipe 25, and the first drain valve 24 is connected with the secondary water inlet pipe 25 through the threaded hole. A threaded hole can also be provided on the secondary water outlet pipe 21 near the bottom end of the secondary water outlet pipe 21 and along the radial direction of the secondary water outlet pipe 21, and the second drain valve 23 is connected with the secondary water outlet pipe 21 through the threaded hole. A third sealing ring groove 343 is provided on the outer wall of the valve body 34 in the circumferential direction, and the third sealing ring 38 is arranged in the third sealing ring groove 343. The third sealing ring groove 343 is arranged at the end of the external threads 341 of the outer wall of the valve body 34, and is used to seal the connection between the valve body 34 and the secondary water inlet pipe 25 or the connection between the valve body 34 and the secondary water outlet pipe 21.

[0059] The zinc sleeve 33, the compression spring piece 31, the compression ring 35, the first sealing ring 36, the valve core 39, and the pressing block 302 are arranged in the inner cavity 342 of the valve body 34 in sequence, and the pressing block 302 is blocked at the end of the inner cavity 342 of the valve body 34, which is located at one end of the valve body 34 provided with the external threads 341.

[0060] ​The button 32 comprises an abutting portion 322 and a pressing portion 321, the abutting portion 322 is arranged in the zinc sleeve 33 at the end of the inner cavity 342 of the valve body 34, and the pressing portion 321 is arranged outside the inner cavity 342. The compression spring sheet 31 comprises a plurality of spring sheets 311 (not shown) distributed in the circumferential direction. The pressing portion 321 is pushed to move the button 32 towards the compression block 302, and the abutting portion 322 can open the spring sheets 311 in the circumferential direction, so that the drainage pipe 303 can pass into the drainage valve. After the drainage pipe 303 is inserted, the pressing portion 321 is pulled in the opposite direction, the abutting portion 322 retreats, and the spring sheets 311 of the compression spring sheet 31 are close to the center, so as to clamp the drainage pipe 303, thereby realizing the automatic locking of the drainage pipe 303. When it is necessary to remove the drainage pipe 303, the pressing portion 321 can be pushed again, and after the spring sheets 311 are opened, the drainage pipe 303 can be pulled out.

[0061] The valve core 39 comprises a valve core body 391 and a valve rod 392, the valve core body 391 is arranged towards the button 32, and the end of the valve rod 392 is exposed outside the inner cavity 342. The valve body 34 is provided with a plurality of liquid inlet holes 344 on the side wall of the side of the compression block 302, and the liquid inlet holes 344 are communicated with the inner cavity 342 of the valve body 34. When the drainage pipe 303 is inserted into the drainage valve and pushes the valve core 39 to move away from the button 32, the end of the valve rod 392 extends outward, the valve core body 391 can be communicated with the inner cavity 342 of the valve body 34, so as to make the drainage valve in an open state. After the drainage pipe 303 is pulled out, the valve core 39 is moved towards the button 32 under the action of the restoring force of the elastic restoring member 301, and when the valve rod 392 abuts against the compression block 302, the valve core 39 is completely reset, and the drainage valve is in a closed state. The connection between the valve core body 391 and the valve rod 392 in the embodiment is provided with a mounting groove 393 in the circumferential direction, one end of the elastic restoring member 301 is arranged in the mounting groove 393, and the other end abuts against the inner wall of the end of the compression block 302 and / or the valve body 34. The elastic restoring member 301 can provide a return power for the valve core 39, so as to prevent the valve core 39 from failing to return. It can be understood that the elastic restoring member 301 can be a spring.

[0062] The inner diameter of the first sealing ring 36 gradually increases from the side close to the valve core 39 to the side away from the valve core 39. The side close to the compression ring 35 of the first sealing ring 36 is provided with an assembly groove 361, and the first sealing ring 36 and the compression ring 35 are matched through the assembly groove 361, so that the drainage valve is more convenient and reliable during assembly. The wall surface of the side close to the valve core 39 of the first sealing ring 36 is provided with an annular groove 362, when the drainage pipe 303 is inserted into the drainage valve, the inner wall of the first sealing ring 36 deforms, so as to easily make the drainage pipe 303 pass through, and after the drainage pipe 303 is inserted in place, the first sealing ring 36 can be reset and ensure the sealing effect of the drainage valve. The annular groove 362 arranged on the first sealing ring 36 can facilitate the deformation of the first sealing ring 36.

[0063] The second sealing ring 37 is disposed between the inner cavity 342 wall surface of the valve core body 391 and the valve body 34, and is used to seal the valve core 39 and the valve body 34.

[0064] like Figure 5 As shown, the drain pipe 303 in this embodiment can be a PE pipe. The drain pipe 303 is inserted into the inner cavity 342 of the valve body 34 from the button 32 side, and applies a pushing force to the valve core 39 to make the valve core 39 in a conductive state. There are no special requirements for the drain pipe 303, as long as its outer diameter is compatible with the inner cavity 342 of the valve body 34 and can apply a pushing force to the valve core 39.

[0065] like Figure 6 , Figure 7 and Figure 8As shown, the conversion cap 304 in the embodiment includes a blocking part 3041, a flange part 3042 and a conducting part 3043 connected in sequence. The radial dimension of the flange part 3042 is greater than the outer diameters of the blocking part 3041 and the conducting part 3043, and the outer diameters of the blocking part 3041 and the conducting part 3043 are adapted to the inner diameter of the button 32. The blocking part 3041 in the embodiment is a solid cylindrical shape. When the drain valve is in a sealed state, the blocking end of the conversion cap 304 is inserted into the inner cavity 342 of the valve body 34 from the side of the button 32, the flange part 3042 abuts against the pressing part 321 of the button 32, and the first sealing ring 36 is sleeved on the blocking part 3041, so that the port of the inner cavity 342 of the valve body 34 is closed, to prevent the inner cavity 342 of the drain valve from being contaminated by dust and other foreign matters from the outside, to avoid internal damage of the drain valve due to the introduction of foreign matters from the outside, and to improve the reliability of the drain valve. The conducting part 3043 is provided with a liquid guiding cavity 3044, or the conducting part 3043 and the inner cavity 342 of the valve body 34 have a certain space, which can serve as the liquid guiding cavity 3044. When the drain valve needs to drain, the conducting part 3043 of the conversion cap 304 is inserted into the inner cavity 342 of the valve body 34 from the side of the button 32, the conducting part 3043 applies a pushing force to the valve core 39 to make the valve core 39 in a conducting state, so that the liquid can be drained from the pipeline through the drain valve and the liquid guiding cavity 3044 at the conducting part 3043. The conversion cap 304 in the embodiment can not only protect the drain valve when the drain valve is in a sealed state, but also can make the valve core 39 in a conducting state when the drain valve needs to drain, to facilitate the drainage of the drain valve. The drainage speed can be controlled by adjusting the size of the liquid guiding cavity 3044. At the same time, when drainage is not needed, the conversion cap 304 is always inserted into the drain valve, which can quickly open the valve core 39 when drainage is needed, to avoid the influence on the normal maintenance due to the failure to find a drain pipe in an emergency. The locking mode between the blocking end of the conversion cap 304 and the drain valve is the same as the locking mode between the drain pipe 303 and the drain valve, which will not be described herein again. When the conducting part 3043 of the conversion cap 304 cannot be locked with the drain valve through the compression spring sheet 31, a manual drainage mode can be adopted to drain the liquid in the pipeline by continuously pressing the conducting part 3043.

[0066] The working principle of the drain valve in the embodiment is as follows: when the drain pipe 303 is not inserted into the drain valve, or the blocking part 3041 of the conversion cap 304 is inserted into the drain valve, the valve core 39 is in a reset state under the elastic force of the elastic reset part 301, the valve rod 392 abuts against the pressing block 302, and the drain valve is in a closed state.

[0067] When the drain pipe 303 is inserted into the drain valve or the through part 3043 of the conversion cap 304 is inserted into the drain valve, the drain pipe 303 or the through part 3043 pushes the valve core 39, so that the valve rod 392 is extended, the liquid enters the inner cavity 342 through the liquid inlet hole 344 of the valve body 34, at this time, the valve core 39 is in communication with the valve body 34, therefore, the liquid can enter the drain pipe 303 through the valve core 39, so as to drain the liquid.

[0068] In order to avoid environmental pollution when draining the liquid, a container for containing liquid can be connected to the water outlet end of the drain pipe 303 or the through part 3043 of the conversion cap 304, or the water outlet end of the drain pipe 303 can be led to the water outlet pipe.

[0069] The liquid cooling pipeline system provided by the embodiment of the application has a simple structure, and can be modified on the basis of the original system. The modification process is very convenient, and can be completed by adding some joint parts, valve body parts and other components. The drain valve of the embodiment can be automatically locked. When the drain pipe is not connected, the valve body is in a closed state, and the liquid in the pipeline cannot leak. When the drain pipe is inserted into the drain valve, the valve body is automatically opened, the liquid in the pipeline can be quickly drained, and the use is very convenient and fast.

[0070] It should be noted that in this paper, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0071] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A liquid cooling tubing system, characterized by, The application relates to a cooling system for a battery pack, comprising: a first water inlet pipe, which is used for being connected with a liquid cooling source, and the liquid cooling source can provide low-temperature cooling liquid for the first water inlet pipe; a first water outlet pipe, which is used for being connected with the liquid cooling source, and high-temperature cooling liquid can flow back to the liquid cooling source from the first water outlet pipe; at least two cooling circulation units, each of which comprises a second water inlet pipe and a second water outlet pipe; the second water inlet pipe is connected with the first water inlet pipe, and at least one water outlet interface is arranged on the second water inlet pipe, which is used for being connected with a cooling module of a battery cluster, and the low-temperature cooling liquid flows into the corresponding cooling module after sequentially passing through the first water inlet pipe and the second water inlet pipe; the second water outlet pipe is connected with the first water outlet pipe, and at least one water inlet interface is arranged on the second water outlet pipe, which is used for being connected with the cooling module; the low-temperature cooling liquid in the cooling module is changed into the high-temperature cooling liquid after absorbing heat, and then flows back to the liquid cooling source after sequentially passing through the second water outlet pipe and the first water outlet pipe; water inlet valves and first liquid discharge valves are sequentially connected between the first water inlet pipe and each second water inlet pipe in the liquid flowing direction; the water inlet valves are used for controlling the conduction or cut-off between the first water inlet pipe and the corresponding second water inlet pipe; and the first liquid discharge valves are used for discharging the cooling liquid in the corresponding cooling circulation unit and the cooling module; water outlet valves are connected between each second water outlet pipe and the first water outlet pipe, and the water outlet valves are used for controlling the conduction or cut-off between the first water outlet pipe and the corresponding second water outlet pipe. Each cooling circulation unit further comprises a third water inlet pipe and a third water outlet pipe; each water outlet interface is connected with a third water inlet pipe; one end of each third water inlet pipe is connected with the corresponding water outlet interface, and the other end of each third water inlet pipe is used for being connected with a water inlet end of a cooling module; each water inlet interface is connected with a third water outlet pipe; one end of each third water outlet pipe is connected with the corresponding water inlet interface, and the other end of each third water outlet pipe is used for being connected with a water outlet end of the cooling module.

2. The liquid cooling tube system of claim 1, wherein: The first water inlet pipe and the first water outlet pipe are arranged in a horizontal direction, the second water inlet pipe and the second water outlet pipe are arranged in a vertical direction, the bottom end of the first water inlet pipe is communicated with the bottom end of the second water inlet pipe, and the bottom end of the first water outlet pipe is communicated with the bottom end of the second water outlet pipe; and the second liquid discharge valves are respectively connected between the bottom end of the second water outlet pipe and the corresponding water outlet valve in each cooling circulation unit.

3. The liquid cooling tube system of claim 1, wherein: ​ 4. The liquid cooling tube system of claim 3, wherein: The first and second liquid discharge valves each comprise a valve body, a button, a compression spring piece, a valve core, an elastic reset member and a compression block; the valve body is provided with an inner cavity, and the button, the compression spring piece, the valve core and the compression block are sequentially arranged in the inner cavity of the valve body; the button comprises an abutting portion and a pressing portion, the abutting portion is arranged in the inner cavity, and the pressing portion is arranged outside the inner cavity; the compression spring piece comprises a plurality of elastic pieces distributed in a circumferential direction, and the abutting portion is used to open the elastic pieces in a circumferential direction; the compression block is sealed at an end portion of the inner cavity of the valve body; the valve core comprises a valve core body and a valve rod, the valve core body is arranged towards the button side, and an end portion of the valve rod is exposed outside the inner cavity; and the elastic reset member is used to move the valve core to reset towards the button side.

5. The liquid cooling tube system of claim 4, wherein: A connecting portion between the valve core body and the valve rod is provided with a mounting groove in a circumferential direction, one end of the elastic reset member is arranged in the mounting groove, and the other end abuts against an inner wall of an end portion of the compression block and / or the valve body.

6. The liquid cooling tube system of claim 4, wherein: The first and second liquid discharge valves further comprise a compression ring and a first sealing ring arranged in the inner cavity of the valve body, the compression ring and the first sealing ring are arranged in the inner cavity between the valve core and the compression spring piece, and the first sealing ring is arranged close to the valve core side.

7. The liquid cooling tube system of claim 6, wherein: An inner diameter of the first sealing ring gradually increases from the side close to the valve core to the side away from the valve core; the first sealing ring is provided with an assembly groove close to the compression ring side, the first sealing ring and the compression ring are matched through the assembly groove; and an annular groove is arranged on a wall surface of the first sealing ring close to the valve core.

8. The liquid cooling tube system of claim 4, wherein: A plurality of liquid inlet holes are arranged on a side wall of the valve body on the side of the compression block, and the liquid inlet holes are in communication with the inner cavity of the valve body.

9. The liquid cooling tube system of claim 4, wherein: A conversion cap is further arranged, the conversion cap comprises a sealing portion and a conducting portion; the sealing portion is used to seal an inner cavity port of the valve body when the first or second liquid discharge valve is in a sealing state; and the conducting portion is used to be inserted into the inner cavity of the valve body from the button side when the first or second liquid discharge valve needs to discharge liquid, to make the valve core in a conducting state by applying a pushing force to the valve core, so that liquid can be discharged from the conducting portion side.

10. The liquid cooling tube system of claim 4, wherein: A liquid discharge pipe is further arranged, the liquid discharge pipe is used to be inserted into the inner cavity of the valve body from the button side, to make the valve core in a conducting state by applying a pushing force to the valve core.

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