An adaptive vent line system and energy storage device

Abstract

The application provides an adaptive air-permeable pipeline system and an energy storage device. The adaptive air-permeable pipeline system comprises an air-permeable system, a hydraulic damping system and a connecting rod connecting the air-permeable system and the hydraulic damping system. The air-permeable system comprises an air-permeable valve body, a sealing spring and a closure in the air-permeable valve body. The end of the air-permeable valve body is connected with a pipeline. One end of the sealing spring is fixedly connected with the end of the air-permeable valve body, and the other end is fixedly connected with the closure. An air-permeable hole communicating with the outside is arranged on the air-permeable valve body. A limiting component is arranged at the air-permeable hole. The limiting component can limit the closure at the air-permeable hole and block the air-permeable hole. The hydraulic damping system is fixedly connected with the closure through the connecting rod and can slow down the movement speed of the closure. Thus, the pipeline can automatically realize operation closure and stop machine air permeation, ensure that the air pressure in the pipeline is completely restored to the atmospheric pressure, and the 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 growing global demand for renewable energy and the development of intelligent power systems, energy storage devices are becoming increasingly important in energy management. Energy storage devices not only effectively balance power supply and demand, improving grid stability and reliability, but also significantly enhance energy efficiency and reduce carbon emissions. In recent years, energy storage technology has made significant progress, especially with the continued expansion of battery energy storage systems, encompassing a wide range of applications, from home users to industrial-grade applications.

[0003] In actual applications, energy storage devices generate a large amount of heat during the charging and discharging process. This heat can cause the battery temperature to be too high, which in turn affects its performance, lifespan, and safety. Therefore, a corresponding cooling system is often required in energy storage devices. Although traditional air cooling systems are low-cost, their 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 air cooling systems, liquid cooling systems have more efficient heat conduction capabilities and more precise temperature control capabilities. They can achieve better heat dissipation effects in a smaller space, while reducing noise levels, improving the overall energy efficiency of the system, and better adapting 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 function 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 the existence of a set negative pressure (opening negative pressure), causing the valve to close prematurely before the system reaches atmospheric pressure. The internal negative pressure cannot be completely eliminated, and there is a risk of failure when preventing siphonage 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 redundant 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 energy storage equipment. Summary of the Invention

[0006] The present invention provides an adaptive ventilation pipeline system and energy storage device that can automatically seal the pipeline during operation and ventilate it when it is shut down, while ensuring that the air pressure in the pipeline is fully restored to atmospheric pressure and reliable operation. 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 includes a ventilation valve body, a sealing spring and a closure member located inside 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 closure member; the ventilation valve body is provided with a ventilation hole connected to the outside world, and a limiting member is provided at the ventilation hole, and the limiting member can limit the closure 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 uniformly arranged circumferentially on the side wall of the damping cylinder.

[0016] Furthermore, the closing member is circular, the limiting member is an annular boss fixedly provided on the inner wall of the air-permeable valve body and adapted to the closing member, and a limiting baffle is fixedly provided in the middle of the limiting member, which is coaxial with the closing member and can press against the top surface of the closing member; a through hole is provided 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 member.

[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 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 ventilation 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 volume of the damping cylinder according to the vacuum degree in the pipeline, and then adjust the closing speed and time of the ventilation pipeline system, which can effectively control the exchange time with the external gas.

[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 utilize its higher viscosity characteristics to achieve hydraulic damping. 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 structural diagram 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 adaptive ventilation pipeline system provided by the first embodiment in use.

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

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

[0028] Figure 7 This is a schematic structural diagram of the adaptive ventilation pipeline system provided in the second embodiment.

[0029] The figures 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 following further describes specific embodiments of the present invention with reference to the accompanying drawings. For ease of description, the terms "front," "back," "front," "backward," "left," "right," "top," "bottom," "up," "down," "inside," "outside," and "inner" used in the present invention to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention or the actual orientation of the product or device during production, use, or sale. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features referred to. Furthermore, in the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "disposed," "connected," "fixed," and "composed" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integration; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] First embodiment

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

[0033] like Figure 1 As shown, the adaptive ventilation piping 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 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 connected to 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 connected to 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, Figure 2 (shown in the figure is a through hole located in the middle of the vent valve body 21), a limiting component 211 is provided at the vent hole 212, and the limiting component 211 can block the movement of the closing member 23, limiting the closing member 23 to be stuck at the vent hole 212, so that the closing member 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 closing member 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 member 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 member 23, the closing member 23 fits with the limiting component 211 to block the air vent 212. At this time, the interior of the pipeline 1 is not connected to the outside world, and the operation is closed.

[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. 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 vent 212 is in an open state, and the pipeline 1 is connected to the outside world through the air vent 212. 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; when the sealing 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 its viscous heat and reducing 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 it can play a buffering role when the air vent 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 improving the service life of the sealing spring 22.

[0039] As the pipeline 1 inhales the atmosphere, the negative pressure in the pipeline 1 gradually disappears, 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; because 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 chamber 31. At this time, due to the viscosity of the coolant itself, the coolant in the damping cylinder When the air in the damping cylinder 32 is discharged, 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 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 ventilation 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 being more stable and reliable; (3) the hydraulic damping system 3 can automatically adjust the liquid inlet volume of the damping cylinder 32 according to the vacuum degree in the pipeline 1, and then adjust the closing speed and time of the ventilation pipeline system, which 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, as 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 breathable pipeline system with 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 service 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 of the piston head 33 during the resetting process, so that the negative pressure in the pipeline 1 can be completely eliminated, 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 circumferentially uniformly arranged on the side wall of the damping cylinder 32; for example, the first inlet and outlet liquid holes 321 are circumferentially uniformly arranged on the upper part of the side wall of the damping cylinder 32, or the second inlet and outlet liquid holes 322 are circumferentially uniformly arranged 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 circumferentially uniformly arranged on the side wall of the damping cylinder 32.

[0047] By adopting the adaptive breathable piping system of the above structure, 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, 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 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 press against the top surface of the closing member 23; a through hole is provided in the middle of the limiting baffle 214, and the sealing spring 22 passes through the through hole in the middle of the limiting baffle 214 and is fixedly connected to the closing member 23.

[0049] The adaptive ventilation pipe system adopts the above structure, and by setting the limiting baffle 214 in the middle of the limiting component 211, the air intake during ventilation can be smoother and the pressure fluctuation can be smaller. It 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. 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 world 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 (not shown in the figure) is also provided on the breathable valve body 21. The filter 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, while ensuring that the air pressure in the pipeline is completely restored to atmospheric pressure, and the operation is reliable.

[0054] Second embodiment

[0055] As another embodiment, this embodiment differs 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 piping 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 closing member 23 located in the ventilation valve body 21; wherein the end of the ventilation valve body 21 is connected to the pipeline 1, and 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 connected to 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 closing member 23; the ventilation valve body 21 is provided with a ventilation hole 212 communicating with the outside world (for example, in this 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 closing member 23, limit the closing member 23 to be stuck at the ventilation hole 212, so that the closing 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 vent 212. At this time, the interior of the pipeline 1 is not connected to the outside world, and the operation is closed.

[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 vent 212 is in an open state, and the pipeline 1 is connected to the outside world through the air vent 212. The outside atmosphere is poured into the pipeline 1 to achieve a ventilation effect.

[0061] The cam 32 is pressed against the piston 33 to release the piston, and the cam 32 is pressed against the piston 33 to release the piston.

[0062] As the pipeline 1 inhales the atmosphere, the negative pressure in the pipeline 1 gradually disappears, and the sealing member 23 is acted upon by the elastic force of the sealing spring 22, and drives the piston head 33 to start moving 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 chamber 31. At this time, due to the viscosity of the coolant itself, the coolant in the damping cylinder 32 is discharged. 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 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 ventilation 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 being more stable and reliable; (3) the hydraulic damping system 3 can automatically adjust the liquid inlet volume of the damping cylinder 32 according to the vacuum degree in the pipeline 1, and then adjust the closing speed and time of the ventilation pipeline system, which can effectively control the exchange time with the external gas.

[0064] The adaptive ventilation pipe 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 restriction 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. Any equivalent changes made based on the shape, structure and principle of the present invention should be included in the scope of protection 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 in the ventilation valve body (21); the end of the ventilation valve body (21) is in communication with 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) in communication with the outside world, 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); 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), and 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 closing member (23) via the connecting rod (4); 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).

2. The adaptive ventilation piping system according to claim 1, characterized in that: The liquid storage chamber (31) is in the shape of a U-shaped communicating vessel.

3. The adaptive ventilation piping 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).

4. The adaptive ventilation piping system according to claim 3, characterized in that: The first liquid inlet and outlet hole (321) is a tapered hole that gradually shrinks from the inside to the outside.

5. The adaptive ventilation piping system according to claim 3, 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).

6. The adaptive ventilation piping system according to claim 1, characterized in that: The closing member (23) is circular, the limiting member (211) is an annular boss fixedly arranged on the inner side wall of the vent 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 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).

7. The adaptive ventilation piping system according to claim 1, characterized in that: The air vent (212) is connected to the outside world through the air outlet (213), the number of the air outlet (213) is at least two, and the air outlet (213) is evenly arranged circumferentially on the side wall of the air valve body (21).

8. The adaptive ventilation piping system according to any one of claims 1 to 7, characterized in that: A filter is provided at the connection between the vent valve body (21) and the pipeline (1).

9. 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 according to any one of claims 1 to 8.

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