Self-adaptive ventilation pipeline system and energy storage equipment

Abstract

The invention provides a self-adaptive ventilation pipeline system and energy storage equipment. The self-adaptive ventilation pipeline system comprises a ventilation system, a hydraulic damping system and a connecting rod connected with the ventilation system and the hydraulic damping system. The ventilation system comprises a ventilation valve body, a sealing spring and a sealing piece, wherein the sealing spring and the sealing piece are located in the ventilation valve body. The end part of the ventilation valve body is communicated with a pipeline; one end of the sealing spring is fixedly connected with the end part of the ventilation valve body, and the other end of the sealing spring is fixedly connected with the sealing piece; a ventilation hole communicated with the outside is formed in the ventilation valve body, a limiting part is arranged at the ventilation hole, and the limiting part can limit the sealing part at the ventilation hole and block the ventilation hole; the hydraulic damping system is fixedly connected with the sealing piece through the connecting rod, and the movement speed of the sealing piece can be reduced. Therefore, the pipeline can automatically achieve operation sealing and shutdown ventilation, it is ensured that the air pressure in the pipeline completely recovers to the atmospheric pressure, and operation is reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage liquid cooling systems, and in particular to an adaptive ventilation pipeline system and energy storage equipment. Background Art

[0002] With the growth of global demand for renewable energy and the intelligent development of power systems, the importance of energy storage equipment in energy management has become increasingly prominent. Energy storage equipment can not only effectively balance the supply and demand of electricity and improve the stability and reliability of the power grid, but also significantly improve energy efficiency and reduce carbon emissions. In recent years, energy storage technology has made great progress, especially the application scope of battery energy storage systems has been continuously expanded, covering all levels from household users to industrial-level applications.

[0003] In actual applications, energy storage devices generate a lot of heat during the charging and discharging process. This heat will cause the battery temperature to be too high, which will affect its performance, life and safety. Therefore, a corresponding cooling system is often required in the energy storage device. Although the traditional air cooling system has a low cost, its heat dissipation efficiency is limited, especially in application scenarios with high power density and compact space, it is difficult to meet the needs of efficient thermal management. Compared with the air cooling system, the liquid cooling system has more efficient heat conduction capabilities and more precise temperature control capabilities, and can achieve better heat dissipation in a smaller space. At the same time, it reduces the noise level, improves the overall energy efficiency of the system, and better adapts to extreme environmental conditions, ensuring the reliable operation of energy storage equipment under various working conditions. Therefore, it has become the preferred solution.

[0004] During the operation of the liquid cooling system, in order to avoid the formation of internal vacuum or internal negative pressure (the internal air pressure of the pipeline is lower than the atmospheric pressure) due to the shrinkage of the coolant volume after shutdown, the existing technology usually adopts physical vacuum breaker valves or electric valves to achieve the functions of pipeline operation sealing and shutdown ventilation. However, these two methods have their own limitations: (1) The physical vacuum breaker valve uses spring reset to control opening and closing. In order to prevent coolant leakage when the system is just started, a large spring tension is required to keep the valve core tightly closed, which leads to a set negative pressure (opening negative pressure), so that the valve is closed in advance before the system reaches atmospheric pressure. The internal negative pressure cannot be completely eliminated, and there is a risk of failure when preventing siphoning and backflow. In addition, the spring is prone to creep when it is continuously tightened for a long time, and the stability is reduced, which may cause oil leakage in the system; (2) The use of electric valves is more expensive and increases the system power. It has higher requirements for control logic and valve reliability, and generally has more redundancy in opening time, which increases the risk of impurities entering.

[0005] In summary, the existing ventilation pipeline system has shortcomings in solving the vacuum problem after the liquid cooling system of energy storage equipment is shut down. A more reliable solution is urgently needed to ensure the safety and long-term stable operation of the energy storage equipment. Summary of the invention

[0006] The present invention provides an adaptive ventilation pipeline system and energy storage equipment, which can automatically realize the operation closure of the pipeline, stop ventilation, and ensure that the air pressure in the pipeline is completely restored to atmospheric pressure, and the operation is reliable. The specific technical solution is as follows:

[0007] An adaptive ventilation pipeline system includes a ventilation system, a hydraulic damping system, and a connecting rod connecting the ventilation system and the hydraulic damping system;

[0008] The ventilation system comprises a ventilation valve body, a sealing spring and a sealing member located in the ventilation valve body; the end of the ventilation valve body is connected to a pipeline; one end of the sealing spring is fixedly connected to the end of the ventilation valve body, and the other end is fixedly connected to the sealing member; the ventilation valve body is provided with a ventilation hole connected to the outside, and a limiting component is provided at the ventilation hole, and the limiting component can limit the sealing member at the ventilation hole and block the ventilation hole;

[0009] The hydraulic damping system is fixedly connected to the closing member via the connecting rod, and can slow down the movement speed of the closing member.

[0010] Furthermore, the hydraulic damping system includes a liquid storage chamber and a damping cylinder and a piston head located in the liquid storage chamber; the damping cylinder is connected to the liquid storage chamber, the piston head is located in the damping cylinder, the piston head is adapted to the damping cylinder, and can move up and down in the damping cylinder; the piston head is fixedly connected to the closing member through the connecting rod.

[0011] Furthermore, the ventilation system and the hydraulic damping system are respectively arranged on the upper and lower side walls of the pipeline, and the top of the liquid storage chamber is connected to the pipeline.

[0012] Furthermore, the liquid storage chamber is in the shape of a U-shaped communicating vessel.

[0013] Furthermore, a plurality of first liquid inlet and outlet holes are provided on the upper side wall of the damping cylinder, a plurality of second liquid inlet and outlet holes are provided on the lower side wall of the damping cylinder, and the diameter of the first liquid inlet and outlet holes is smaller than the diameter of the second liquid inlet and outlet holes.

[0014] Furthermore, the first liquid inlet and outlet hole is a tapered hole that gradually shrinks from the inside to the outside.

[0015] Furthermore, the first liquid inlet and outlet holes and / or the second liquid inlet and outlet holes are evenly arranged circumferentially on the side wall of the damping cylinder.

[0016] Furthermore, the closing piece is circular, the limiting component is an annular boss fixedly arranged on the inner wall of the air-permeable valve body and adapted to the closing piece, and a limiting baffle is also fixedly arranged in the middle of the limiting component, which is coaxial with the closing piece and can abut against the top surface of the closing piece; a through hole is arranged in the middle of the limiting baffle, and the sealing spring passes through the through hole in the middle of the limiting baffle and is fixedly connected to the closing piece.

[0017] Furthermore, the air vent is connected to the outside through an air outlet hole, the number of the air outlet holes is at least two, and the air outlet holes are evenly arranged circumferentially on the side wall of the air valve body.

[0018] Furthermore, a filter screen is provided at the connection between the air-permeable valve body and the pipeline.

[0019] An energy storage device includes a liquid cooling system, and the liquid cooling system is provided with the adaptive ventilation pipeline system described above.

[0020] The adaptive ventilation pipeline system and energy storage device provided by the present invention have the following beneficial effects through the mutual cooperation of the ventilation system and the hydraulic damping system: (1) the pipeline can be automatically closed during operation and ventilated when shut down, while ensuring that the air pressure in the pipeline is completely restored to atmospheric pressure; (2) the hydraulic damping system plays a buffering role when the ventilation pipeline system is opened due to the negative pressure in the pipeline, slowing down its instantaneous opening rate, and under the upward buoyancy of the hydraulic damping system, the tension provided by the sealing spring can be reduced, thereby increasing the service life of the sealing spring and being more stable and reliable; (3) the hydraulic damping system can automatically adjust the liquid inlet of the damping cylinder according to the vacuum degree in the pipeline, thereby adjusting the closing speed and time of the ventilation pipeline system, and can effectively control the time for exchanging gas with the outside world.

[0021] Furthermore, the top of the liquid storage chamber is connected to the pipeline, so that the hydraulic damping system can directly use the cooling oil in the pipeline and realize the hydraulic damping effect by utilizing its higher viscosity characteristics. When the system operates normally, the coolant in the liquid storage chamber will circulate normally in the system without the need for separate maintenance and replacement. In addition, the liquid storage chamber is in the shape of a U-shaped communicating vessel, so that both ends of the liquid storage chamber can be connected to the pipeline, so that the cooling oil in the liquid storage chamber will not be carried out by the negative pressure of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the adaptive ventilation pipeline system provided in the first embodiment.

[0023] Figure 2 for Figure 1 A partial enlarged view of area A in the middle.

[0024] Figure 3 for Figure 1 A partial enlarged view of area B in the middle.

[0025] Figure 4 This is a schematic diagram of the use status of the adaptive ventilation pipeline system provided by the first embodiment.

[0026] Figure 5 for Figure 4 A partial enlarged view of area C in the middle.

[0027] Figure 6 for Figure 4 A partial enlarged view of area D in the middle.

[0028] Figure 7 A schematic diagram of the structure of an adaptive ventilation pipeline system provided in the second embodiment.

[0029] The accompanying drawings are marked as follows: 1 is a pipeline, 2 is a ventilation system, 21 is a ventilation valve body, 211 is a limiting component, 212 is a ventilation hole, 213 is an air outlet hole, 214 is a limiting baffle, 215 is a conical guide groove, 22 is a sealing spring, 23 is a closing member, 3 is a hydraulic damping system, 31 is a liquid storage chamber, 32 is a damping cylinder, 321 is a first liquid inlet and outlet hole, 322 is a second liquid inlet and outlet hole, 33 is a piston head, and 34 is a connecting rod. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. For the convenience of description, the directions or positional relationships indicated by the terms "front", "rear", "front", "reverse", "left", "right", "top", "bottom", "up", "down", "inside", "outside", "inside", etc. in the present invention are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention and the actual direction of the product or device during production, use, sales, etc. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Furthermore, in the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "set", "connected", "fixed", "composed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] First embodiment

[0032] The present invention provides an adaptive ventilation pipeline system, which can automatically realize the operation closure of the pipeline and ventilation when the pipeline is shut down, and at the same time ensure that the air pressure in the pipeline is completely restored to the atmospheric pressure, and the operation is reliable.

[0033] like Figure 1 As shown, the adaptive ventilation pipeline system includes a ventilation system 2, a hydraulic damping system 3 and a connecting rod 4 connecting the ventilation system 2 and the hydraulic damping system 3; the ventilation system 2 and the hydraulic damping system 3 are respectively arranged on the symmetrical sides of the pipeline 1. For example, in this embodiment, the ventilation system 2 is arranged on the upper side wall of the horizontal pipeline 1, and the hydraulic damping system 3 is arranged on the lower side wall of the horizontal pipeline 1. Specifically:

[0034] like Figure 2 As shown, the ventilation system 2 includes a ventilation valve body 21 and a sealing spring 22 and a closure member 23 located in the ventilation valve body 21; wherein the end of the ventilation valve body 21 is communicated with the pipeline 1. In this patent, the end of the ventilation valve body 21 refers to the bottom or top of the ventilation valve body 21. For example, in this embodiment, the bottom of the ventilation valve body 21 is communicated with the pipeline 1; one end of the sealing spring 22 is fixedly connected to the top of the ventilation valve body 21, and the other end is fixedly connected to the closure member 23; the ventilation valve body 21 is provided with a ventilation hole 212 communicating with the outside world (for example, in this embodiment, as shown in FIG. Figure 2 The through hole in the middle of the vent valve body 21 is shown in the figure, and a limiting component 211 is provided at the vent hole 212. The limiting component 211 can block the movement of the closing component 23, and limit the closing component 23 to be stuck at the vent hole 212, so that the closing component 23 blocks the vent hole 212;

[0035] like Figure 3 As shown, the hydraulic damping system 3 includes a liquid storage chamber 31, a damping cylinder 32, a piston head 33 and a connecting rod 4; wherein, the damping cylinder 32 and the piston head 33 are located in the liquid storage chamber 31, and the damping cylinder 32 is communicated with the liquid storage chamber 31 to realize the flow of liquid; the piston head 33 is located in the damping cylinder 32, and the piston head 33 is adapted to the damping cylinder 32 and can move up and down in the damping cylinder 32; the closure 23 and the piston head 33 are fixedly connected by the connecting rod 4; in this embodiment, the liquid in the liquid storage chamber 31 is the coolant of the liquid cooling system.

[0036] When the liquid cooling system is in operation, the sealing spring 22 is in a stretched state, and the closing piece 23 moves upward to the limiting component 211 under the upward pulling force of the sealing spring 22. When the limiting component 211 limits and clamps the closing piece 23, the closing piece 23 fits with the limiting component 211 to block the air hole 212. At this time, the interior of the pipeline 1 is not connected to the outside world, achieving operational closure.

[0037] When the liquid cooling system stops running, Figure 4 , Figure 5 , Figure 6 As shown, due to the shrinkage of the coolant volume, a vacuum is formed inside the pipeline 1, and the negative pressure causes the closure 23 to overcome the pulling force of the sealing spring 22 and move downward. At this time, the air hole 212 is in an open state, and the pipeline 1 is connected to the outside world through the air hole 212, and the outside atmosphere is poured into the pipeline 1 to achieve a ventilation effect.

[0038] In this embodiment, the internal space of the damping cylinder 32 is divided into a positive cavity and a negative cavity, wherein the space above the piston head 33 is the positive cavity, and the space below the piston head 33 is the negative cavity; while the closure member 23 moves downward, the piston head 33 is driven to move downward in the damping cylinder 32 by the connecting rod 4, and the piston head 33 pushes the coolant in the negative cavity of the damping cylinder 32 to be discharged into the liquid storage chamber 31. At this time, due to the viscosity of the coolant itself, a large pressure loss will be generated when the coolant is discharged from the damping cylinder 32, causing viscosity heating and reducing the speed of passage, thereby slowing down the movement speed of the piston head 33 and the closure member 23 fixedly connected to the piston head 33, so that it can play a buffering role when the air vent pipe system is opened due to the negative pressure of the pipe 1, slowing down its instantaneous opening rate, and under the upward buoyancy of the hydraulic damping system 3, the tension provided by the sealing spring 22 can be reduced, thereby increasing the life of the sealing spring 22.

[0039] As the pipeline 1 inhales the atmosphere, the negative pressure in the pipeline 1 is gradually eliminated, and the sealing member 23 is pulled by the sealing spring 22, and the piston head 33 starts to move upward through the connecting rod 4; since the piston head 33 pushes the coolant in the reverse cavity of the damping cylinder 32 to be discharged, the coolant will also flow into the positive cavity of the damping cylinder 32, so when the piston head 33 moves upward, it will squeeze the coolant in the positive cavity of the damping cylinder 32 and discharge it into the liquid storage cavity 31. At this time, due to the viscosity of the coolant itself, the coolant in the damping cylinder When the coolant is discharged from the damping cylinder 32, a large pressure loss will be generated, causing its viscosity to heat up and reduce the speed of passing through, thereby slowing down the movement speed of the piston head 33 and the sealing member 23 fixedly connected to the piston head 33, so that the air pressure in the pipeline 1 can be fully restored to the atmospheric pressure after sufficient time; when the negative pressure in the pipeline 1 is greater, the sealing member 23 drives the piston head 33 to move downward through the connecting rod 4. The more coolant enters the positive cavity of the damping cylinder 32, and during the reset process, more coolant needs to be discharged, and the reset time is longer.

[0040] The adaptive ventilation pipeline system with the above structure has the following beneficial effects through the mutual cooperation of the ventilation system 2 and the hydraulic damping system 3: (1) the pipeline 1 can be automatically closed during operation and ventilated when shut down, while ensuring that the air pressure of the pipeline 1 is completely restored to atmospheric pressure; (2) the hydraulic damping system 3 plays a buffering role when the ventilation pipeline system is opened due to the negative pressure of the pipeline 1, slowing down its instantaneous opening rate, and under the upward buoyancy of the hydraulic damping system 3, the tension provided by the sealing spring 22 can be reduced, thereby increasing the service life of the sealing spring 22 and making it more stable and reliable; (3) the hydraulic damping system 3 can automatically adjust the liquid intake of the damping cylinder 32 according to the vacuum degree in the pipeline 1, thereby adjusting the closing speed and time of the ventilation pipeline system, and can effectively control the exchange time with the external gas.

[0041] In some embodiments, the top of the liquid storage chamber 31 is connected to the pipeline 1, so that the hydraulic damping system 3 can directly use the cooling oil in the pipeline 1 and utilize its higher viscosity characteristics to achieve hydraulic damping. When the system is operating normally, the coolant in the liquid storage chamber 31 will circulate normally in the system without the need for separate maintenance and replacement.

[0042] In some embodiments, the liquid storage chamber 31 is in the shape of a U-shaped communicating vessel, so that both ends of the liquid storage chamber 31 are connected to the pipeline 1, thereby preventing the cooling oil in the liquid storage chamber 31 from being carried out by the negative pressure of the pipeline 1.

[0043] In some embodiments, Figure 6As shown, a plurality of first liquid inlet and outlet holes 321 are provided on the positive cavity of the damping cylinder 32, that is, the upper part of the side wall of the damping cylinder 32, and a plurality of second liquid inlet and outlet holes 322 are provided on the reverse cavity of the damping cylinder 32, that is, the lower part of the side wall of the damping cylinder 32, and the diameter of the first liquid inlet and outlet holes 321 is smaller than the diameter of the second liquid inlet and outlet holes 322.

[0044] By adopting the adaptive air-permeable pipeline system of the above structure, the diameter of the first inlet and outlet liquid hole 321 on the upper part of the side wall of the damping cylinder 32 is smaller than the diameter of the second inlet and outlet liquid hole 322 on the lower part of the side wall of the damping cylinder 32, so that the upward movement speed of the piston head 33 during the resetting process can be slower, so that the negative pressure in the pipeline 1 can be completely eliminated, and at the same time, the rebound of the sealing spring 22 is slowed down, which can increase the life of the sealing spring 22.

[0045] In some embodiments, the first liquid inlet and outlet hole 321 is a tapered hole that gradually shrinks from the inside to the outside, which can further slow down the upward movement speed of the piston head 33 during the resetting process, so that the negative pressure in the pipeline 1 can be completely removed, thereby increasing the life of the sealing spring 22.

[0046] In some embodiments, the first inlet and outlet liquid holes 321 and / or the second inlet and outlet liquid holes 322 are uniformly arranged circumferentially on the side wall of the damping cylinder 32; for example, the first inlet and outlet liquid holes 321 are uniformly arranged circumferentially on the upper part of the side wall of the damping cylinder 32, or the second inlet and outlet liquid holes 322 are uniformly arranged circumferentially on the lower part of the side wall of the damping cylinder 32, or more preferably, as shown in this embodiment, the first inlet and outlet liquid holes 321 and the second inlet and outlet liquid holes 322 are both uniformly arranged circumferentially on the side wall of the damping cylinder 32.

[0047] By adopting the adaptive breathable pipeline system of the above structure, the first inlet and outlet liquid holes 321 and / or the second inlet and outlet liquid holes 322 are evenly arranged circumferentially on the side wall of the damping cylinder 32, so that the flow rate is uniform and the pressure is balanced during the inlet and outlet of the liquid, thereby improving the damping effect, thereby optimizing the performance of the hydraulic damping system 3 and improving the reliability.

[0048] In some embodiments, the closing member 23 is circular, the limiting member 211 is an annular boss fixedly provided on the inner wall of the air-permeable valve body 21 and adapted to the closing member 23, and a limiting baffle 214 is fixedly provided in the middle of the limiting member 211, which is coaxial with the closing member 23 and can abut against the top surface of the closing member 23; a through hole is provided in the middle of the limiting baffle 211, and the sealing spring 22 passes through the through hole in the middle of the limiting baffle 211 and is fixedly connected to the closing member 23.

[0049] The adaptive ventilation pipeline system with the above structure can make the air inhalation smoother and the pressure fluctuation smaller during ventilation by setting the limiting baffle 214 in the middle of the limiting component 211, and can also slow down the expansion and contraction speed of the sealing spring 22 and increase the service life of the sealing spring 22.

[0050] In some embodiments, a conical guide groove 215 with an isosceles trapezoidal vertical cross-section is provided between the limiting component 211 and the bottom of the breathable valve body 21, and the top of the conical guide groove 215 is adapted to the closure member 23, which can further make the air inhalation smoother and the pressure fluctuation smaller during ventilation, and can play a guiding role during the up and down movement of the closure member 23.

[0051] In some embodiments, the air hole 212 is connected to the outside through an air outlet hole 213 located above the air hole 212. The number of the air outlet holes 213 is at least two, and the air outlet holes 213 are evenly arranged circumferentially on the side wall of the air valve body 21, so that the gas coming out of the air hole 212 changes direction and is discharged, which can slow down the expansion and contraction speed of the sealing spring 22, and make the air flow uniform and the pressure balanced when entering and exiting the system, thereby optimizing the performance of the ventilation system 2 and improving reliability.

[0052] In some embodiments, a filter screen (not shown in the figure) is also provided on the breathable valve body 21. The filter screen is provided at the connection between the breathable valve body 21 and the pipeline 1 to prevent impurities and pollutants from entering the system, thereby ensuring the cleanliness and normal operation of the system.

[0053] The present invention also provides an energy storage device, which dissipates heat and cools through a liquid cooling system, and the liquid cooling system is provided with an adaptive ventilation pipeline system as described in any one of the above items, so that the pipeline can automatically achieve operation closure and ventilation when shut down, and at the same time ensure that the air pressure in the pipe is completely restored to atmospheric pressure, and the operation is reliable.

[0054] Second embodiment

[0055] As another implementation, this embodiment is different from the first embodiment in that the ventilation system 2 and the hydraulic damping system 3 are not respectively arranged on two symmetrical sides of the pipeline 1, but are arranged on the same side of the pipeline 1. Specifically:

[0056] like Figure 7 As shown, the adaptive ventilation pipeline system includes a ventilation system 2, a hydraulic damping system 3 and a connecting rod 4 connecting the ventilation system 2 and the hydraulic damping system 3; the ventilation system 2 and the hydraulic damping system 3 are arranged on the same side of the pipeline 1. For example, in this embodiment, the ventilation system 2 and the hydraulic damping system 3 are both arranged above the horizontal pipeline 1. Specifically:

[0057] The ventilation system 2 includes a ventilation valve body 21 and a sealing spring 22 and a closure member 23 located in the ventilation valve body 21; wherein the end of the ventilation valve body 21 is communicated with the pipeline 1. In the present patent, the end of the ventilation valve body 21 refers to the bottom or top of the ventilation valve body 21. For example, in the present embodiment, the bottom of the ventilation valve body 21 is communicated with the pipeline 1; one end of the sealing spring 22 is fixedly connected to the bottom of the ventilation valve body 21, and the other end is fixedly connected to the closure member 23; the ventilation valve body 21 is provided with a ventilation hole 212 communicating with the outside world (for example, in the present embodiment, the ventilation hole 212 is directly provided at the top of the ventilation valve body 21), and a limiting component 211 is provided at the ventilation hole 212, and the limiting component 211 can block the movement of the closure member 23, and limit the closure member 23 to be stuck at the ventilation hole 212, so that the closure member 23 blocks the ventilation hole 212;

[0058] The hydraulic damping system 3 includes a liquid storage chamber 31, a damping cylinder 32, a piston head 33 and a connecting rod 4; wherein the damping cylinder 32 and the piston head 33 are located in the liquid storage chamber 31, and the damping cylinder 32 is communicated with the liquid storage chamber 31 to realize the flow of liquid; the piston head 33 is located in the damping cylinder 32, and the piston head 33 is adapted to the damping cylinder 32 and can move up and down in the damping cylinder 32; the closing member 23 and the piston head 33 are fixedly connected by the connecting rod 4.

[0059] When the liquid cooling system is in operation, the sealing spring 22 is in a compressed state, and the closing member 23 moves upward to the limiting component 211 under the upward elastic force of the sealing spring 22. When the limiting component 211 limits and clamps the closing member 23, the closing member 23 fits with the limiting component 211 to block the air hole 212. At this time, the interior of the pipeline 1 is not connected to the outside world, achieving operational closure.

[0060] When the liquid cooling system stops running, a vacuum is formed inside the pipeline 1 due to the shrinkage of the coolant volume. The negative pressure causes the closure 23 to overcome the elastic force of the sealing spring 22 and move downward. At this time, the air hole 212 is in an open state, and the pipeline 1 is connected to the outside world through the air hole 212. The outside atmosphere is poured into the pipeline 1 to achieve a ventilation effect.

[0061] In this embodiment, the internal space of the damping cylinder 32 is divided into a positive cavity and a negative cavity, wherein the space above the piston head 33 is the positive cavity, and the space below the piston head 33 is the negative cavity; while the closure member 23 moves downward, the piston head 33 is driven to move downward in the damping cylinder 32 by the connecting rod 4, and the piston head 33 pushes the coolant in the negative cavity of the damping cylinder 32 to be discharged into the liquid storage chamber 31. At this time, due to the viscosity of the coolant itself, a large pressure loss will be generated when the coolant is discharged from the damping cylinder 32, causing viscosity heating and reducing the speed of passage, thereby slowing down the movement speed of the piston head 33 and the closure member 23 fixedly connected to the piston head 33, so that it can play a buffering role when the air permeable pipeline system is opened due to the negative pressure of the pipeline 1, slowing down its instantaneous opening rate, and under the upward buoyancy of the hydraulic damping system 3, the elastic force provided by the sealing spring 22 can be reduced, thereby increasing the life of the sealing spring 22.

[0062] As the pipeline 1 inhales the atmosphere, the negative pressure in the pipeline 1 is gradually eliminated, and the sealing member 23 is acted upon by the elastic force of the sealing spring 22, and the piston head 33 starts to move upward through the connecting rod 4; since the piston head 33 pushes the coolant in the reverse cavity of the damping cylinder 32 to be discharged, the coolant also flows into the positive cavity of the damping cylinder 32, so when the piston head 33 moves upward, it squeezes the coolant in the positive cavity of the damping cylinder 32 and discharges it into the liquid storage cavity 31. At this time, due to the viscosity of the coolant itself, the coolant in the damping cylinder 32 is When the air is discharged from the cylinder 32, a large pressure loss will be generated, causing its viscosity to heat up and reduce the speed of passage, thereby slowing down the movement speed of the piston head 33 and the sealing member 23 fixedly connected to the piston head 33, so that the air pressure in the pipeline 1 can be fully restored to atmospheric pressure after sufficient time; when the negative pressure in the pipeline 1 is greater, the sealing member 23 drives the piston head 33 to move downward through the connecting rod 4. The more coolant enters the positive cavity of the damping cylinder 32, and during the reset return process, more coolant needs to be discharged, and the reset time is longer.

[0063] The adaptive ventilation pipeline system with the above structure has the following beneficial effects through the mutual cooperation of the ventilation system 2 and the hydraulic damping system 3: (1) the pipeline 1 can be automatically closed during operation and ventilated when shut down, while ensuring that the air pressure of the pipeline 1 is completely restored to atmospheric pressure; (2) the hydraulic damping system 3 plays a buffering role when the ventilation pipeline system is opened due to the negative pressure of the pipeline 1, slowing down its instantaneous opening rate, and under the upward buoyancy of the hydraulic damping system 3, the elastic force provided by the sealing spring 22 can be reduced, thereby increasing the service life of the sealing spring 22 and making it more stable and reliable; (3) the hydraulic damping system 3 can automatically adjust the liquid intake of the damping cylinder 32 according to the vacuum degree in the pipeline 1, thereby adjusting the closing speed and time of the ventilation pipeline system, and can effectively control the exchange time with the external gas.

[0064] The adaptive ventilation pipeline system provided by the present invention can be applied to various energy storage devices or similar liquid cooling systems, and is particularly suitable for liquid cooling systems of open overflow battery packs. The open overflow battery pack refers to a battery pack with a liquid inlet at the bottom and a liquid return port at the top, and its overflow liquid surface can be connected to the atmosphere; there is no limitation here.

[0065] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the shape, structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptive ventilation pipeline system, characterized in that: It comprises a ventilation system (2), a hydraulic damping system (3) and a connecting rod (4) connecting the ventilation system (2) and the hydraulic damping system (3); The ventilation system (2) comprises a ventilation valve body (21), a sealing spring (22) and a closing member (23) located inside the ventilation valve body (21); the end of the ventilation valve body (21) is connected to the pipeline (1); one end of the sealing spring (22) is fixedly connected to the end of the ventilation valve body (21), and the other end is fixedly connected to the closing member (23); the ventilation valve body (21) is provided with a ventilation hole (212) communicating with the outside, and a limiting member (211) is provided at the ventilation hole (212), and the limiting member (211) can limit the closing member (23) at the ventilation hole (212) and block the ventilation hole (212); The hydraulic damping system (3) is fixedly connected to the closing member (23) via the connecting rod (4), and can slow down the movement speed of the closing member (23).

2. The adaptive ventilation pipeline system according to claim 1, characterized in that: The hydraulic damping system (3) comprises a liquid storage chamber (31), a damping cylinder (32) and a piston head (33) located in the liquid storage chamber (31); the damping cylinder (32) is communicated with the liquid storage chamber (31), the piston head (33) is located in the damping cylinder (32), the piston head (33) is adapted to the damping cylinder (32), and can move up and down in the damping cylinder (32); the piston head (33) is fixedly connected to the sealing member (23) via the connecting rod (4).

3. The adaptive ventilation pipeline system according to claim 2, characterized in that: The ventilation system (2) and the hydraulic damping system (3) are respectively arranged on the upper and lower side walls of the pipeline (1), and the top of the liquid storage chamber (31) is connected to the pipeline (1).

4. The adaptive ventilation pipeline system according to claim 3, characterized in that: The liquid storage chamber (31) is in the shape of a U-shaped communicating vessel.

5. The adaptive ventilation pipeline system according to claim 1, characterized in that: A plurality of first liquid inlet and outlet holes (321) are provided on the upper portion of the side wall of the damping cylinder (32), and a plurality of second liquid inlet and outlet holes (322) are provided on the lower portion of the side wall of the damping cylinder (32), and the diameter of the first liquid inlet and outlet holes (321) is smaller than the diameter of the second liquid inlet and outlet holes (322).

6. The adaptive ventilation pipeline system according to claim 5, characterized in that: The first liquid inlet and outlet hole (321) is a tapered hole that gradually shrinks from the inside to the outside.

7. The adaptive ventilation pipeline system according to claim 5, characterized in that: The first liquid inlet and outlet holes (321) and / or the second liquid inlet and outlet holes (322) are evenly arranged circumferentially on the side wall of the damping cylinder (32).

8. The adaptive ventilation pipeline system according to claim 1, characterized in that: The closing member (23) is circular in shape, the limiting member (211) is an annular boss fixedly arranged on the inner side wall of the breathable valve body (21) and adapted to the closing member (23), and a limiting baffle (214) coaxial with the closing member (23) and capable of abutting against the top surface of the closing member (23) is also fixedly arranged in the middle of the limiting member (211); a through hole is arranged in the middle of the limiting baffle (211), and the sealing spring (22) passes through the through hole in the middle of the limiting baffle (211) and is fixedly connected to the closing member (23).

9. The adaptive ventilation pipeline system according to claim 1, characterized in that: The air vent (212) is in communication with the outside world via the air outlet holes (213); the number of the air outlet holes (213) is at least two, and the air outlet holes (213) are evenly arranged circumferentially on the side wall of the air-permeable valve body (21).

10. The adaptive ventilation pipeline system according to any one of claims 1 to 9, characterized in that: A filter screen is provided at the connection between the air-permeable valve body (21) and the pipeline (1).

11. An energy storage device, characterized in that: It comprises a liquid cooling system, and the liquid cooling system is provided with the adaptive ventilation pipeline system as described in any one of claims 1 to 10.

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