Pressure relief device
By using a parallel branch pipeline design and a controller to control the flow, the problems of noise pollution and efficiency reduction during pressure relief in the battery manufacturing process were solved, achieving a balance between noise and efficiency, and improving production efficiency and environmental quietness.
Patent Information
- Application Number
- CN202520599924.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-31
AI Technical Summary
During battery manufacturing, the noise pollution and efficiency reduction caused by depressurization are problems that existing technologies struggle to balance between noise and efficiency.
The system adopts a parallel branch pipeline design, with one branch pipeline equipped with a silencer and the other branch pipeline having adjustable flow. The flow of both is precisely controlled by a controller to achieve a balance between noise and efficiency.
It effectively reduces noise during the depressurization process while avoiding excessive efficiency reduction, meeting the dual requirements of noise and efficiency in production, and improving the adaptability and versatility of the device.
Smart Images
Figure CN223825699U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery manufacturing technical field especially relates to a pressure relief device. BACKGROUND
[0002] During the preparation of the battery, it needs to be placed in a pressure vessel, for example, the battery after liquid injection is placed in a pressure vessel, and the pressure in the pressure vessel can be increased to accelerate the diffusion and infiltration of the electrolyte, thereby improving the overall battery preparation efficiency. Because of the pressure in the pressure vessel, after completing the process steps such as standing, the pressure vessel needs to be opened to take out the battery for subsequent detection, assembly and other operations. If the pressure in the container is too high, the container cannot be safely opened, so the pressure vessel needs to be relieved.
[0003] However, when relieving pressure, a large amount of noise is generated, for example, the pipeline noise generated when relieving pressure is more than 90 decibels. This noise not only endangers the post operators, but also causes noise pollution to the environment around the pressure vessel device.
[0004] To this end, in actual operation, the pressure relief flow of the pressure vessel is controlled, which indeed reduces the noise, but this reduces the pressure relief efficiency, and further reduces the overall work efficiency, so there is an urgent need for a solution that balances noise and efficiency. SUMMARY
[0005] In order to overcome at least one of the above-mentioned defects of the prior art, according to one aspect of the present application, a pressure relief device is provided, comprising a main pipeline and a controller, one end of the main pipeline is connected to a pressure vessel and the other end is an outlet end;
[0006] The main pipeline includes two parallel branch pipelines, each branch pipeline is provided with a valve body for controlling the flow size, the two valve bodies are in communication connection with the controller, and the two branch pipelines are provided with a silencer only in one of them.
[0007] In an embodiment of the present application, the silencer includes a resistive silencer.
[0008] In an embodiment of the present application, the porosity of the resistive silencer is φ, wherein the range of porosity φ: 5%≤φ≤95%.
[0009] In an embodiment of the present application, the porosity of the resistive silencer is φ, and the porosity φ is 60%.
[0010] In an embodiment of the present application, the silencer is a composite silencer, which is composed of a resistive silencer and at least one different type of silencer, including a resistive silencer, a diffusion silencer or a resonance silencer.
[0011] In an embodiment of the present application, the corresponding branch line with the muffler is provided with a pressure sensor, which is in communication connection with the controller.
[0012] In an embodiment of the present application, in the corresponding branch line with the muffler, the pressure sensor is arranged close to one side of the pressure container, and the valve body is arranged between the pressure sensor and the muffler.
[0013] In an embodiment of the present application, the controller is used to first open the valve body in the branch line with the muffler, and keep the valve body in the branch line without the muffler closed, until the pressure sensor detects that the pressure value is reduced to a preset pressure value, then the valve body in the branch line without the muffler is opened by the controller.
[0014] In an embodiment of the present application, the controller is used to first open the valve body in the branch line with the muffler, and keep the valve body in the branch line without the muffler closed, until the pressure sensor detects that the pressure value is reduced to a preset pressure value, then the valve body in the branch line without the muffler is opened by the controller.
[0015] In an embodiment of the present application, the preset pressure value is set and stored in the controller, and the preset pressure value is between the initial pressure value inside the pressure container and the pressure value at the outlet end.
[0016] In summary, the pressure relief device provided by the present application has the following technical effects:
[0017] The pressure relief device of the present embodiment can well balance the noise and the efficiency, by arranging two parallel branch lines with different functions (one with a muffler and one capable of assisting in adjusting the flow), and precisely controlling the flow of the two branch lines by the controller, the noise generated in the pressure relief process is reduced, and the pressure relief efficiency is not excessively reduced, the problem of reducing the working efficiency caused by simply reducing the pressure relief flow is effectively solved, and the dual requirements of noise and efficiency in actual production are met. BRIEF DESCRIPTION OF DRAWINGS
[0018] Fig. 1 FIG. 1 is a structural schematic view of the pressure relief device of the present application;
[0019] Fig. 2 FIG. 5 is a schematic view of the muffler in the pressure relief device of the present application;
[0020] FIG. 1 is a structural schematic view of the pressure relief device of the present application; DETAILED DESCRIPTION
[0021] For better understanding and implementation, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application.
[0022] In the description of the present application, it should be pointed out that the directions or position relations indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application in that the indicated devices or elements must have a specific direction, be constructed and operated in a specific direction.
[0023] 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 the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.
[0024] The embodiments of the present application disclose a pressure relief device for use in a pressure vessel. It should be noted that the application scenarios of the pressure relief device and the pressure vessel are described to better understand the present application.
[0025] During the preparation process of the battery, it needs to be placed in a pressure vessel, for example, the battery after liquid injection is placed in a pressure vessel, and the pressure vessel can be pressurized to accelerate the diffusion and infiltration of the electrolyte. The pressure vessel can store positive pressure fluid medium, such as air, nitrogen, oxygen, etc. The so-called positive pressure refers to the pressure inside the pressure vessel being higher than the pressure at the outlet of the pressure vessel.
[0026] Since the positive pressure is applied to the pressure vessel, after completing the process steps such as standing, the pressure vessel needs to be opened to take out the battery for subsequent detection, assembly and other operations. If the pressure in the container is too high, the container cannot be safely opened, and therefore the pressure vessel needs to be relieved. Therefore, during the pressure relief process, a large amount of noise is generated. If the pressure relief flow of the pressure vessel is simply reduced, although the noise can be reduced, the pressure relief efficiency will be reduced, and the overall work efficiency will be reduced. Therefore, there is an urgent need for a solution that can balance noise and efficiency. The present application is improved in such a background.
[0027] The pressure relief device of the present application will be described in detail below in conjunction with the drawings. Figs. 1-2
[0028] Specifically, the pressure relief device comprises a main pipeline and a controller 2, one end of the main pipeline is connected to the pressure container 1 and the other end is an outlet end 7; the main pipeline comprises two parallel branch pipelines 3, each of the branch pipelines 3 is provided with a valve body 4 for controlling the flow size, the two valve bodies 4 are in communication connection with the controller 2, and the two branch pipelines 3 are provided with a silencer 5 only in one of them.
[0029] The overall framework of the pressure relief device of the embodiment is specifically that the pressure relief device is connected to the pressure container 1 through the main pipeline, the main pipeline is divided into two parallel branch pipelines 3; and each of the branch pipelines 3 is provided with a valve body 4 capable of controlling the flow size, and the two valve bodies 4 are in communication connection with the controller 2 and can receive the instructions of the controller 2 to adjust the flow. At the same time, the silencer 5 is provided in only one of the two branch pipelines 3.
[0030] When pressure relief is needed, the pressure relief control can be performed as follows: when the pressure container 1 needs to be relieved, the controller 2 sends instructions to the two valve bodies 4 according to the actual situation (such as a preset pressure value, a noise standard, etc.) to control the flow of the two branch pipelines 3 respectively. Since the two branch pipelines 3 are in parallel, the fluid can flow out from the two branch pipelines 3 respectively, and by adjusting the flow of the two branch pipelines 3 differently, the overall pressure relief flow and noise can be controlled.
[0031] For example, when it is desired to reduce the noise while ensuring a certain pressure relief efficiency, the branch pipeline 3 provided with the silencer 5 can pass through a larger flow to reduce the noise generated by the fluid by using the silencer 5, and the branch pipeline 3 not provided with the silencer 5 can pass through a smaller flow to ensure the overall pressure relief efficiency.
[0032] For this, the pressure relief device of the embodiment can well balance the noise and the efficiency, by providing two parallel branch pipelines 3 with different functions (one has the silencer 5 and one can assist in adjusting the flow) and precisely controlling the flow of the two branch pipelines 3 by the controller 2, the noise generated in the pressure relief process is reduced while the pressure relief efficiency is not excessively reduced, the problem that the working efficiency is reduced due to the simple reduction of the pressure relief flow is effectively solved, and the dual requirements of noise and efficiency in actual production are met.
[0033] In addition, the pressure relief device of the embodiment can also be flexibly adjusted, for example, since the valve body 4 is in communication connection with the controller 2, the flow distribution of the two branch pipelines 3 can be flexibly adjusted according to different pressure states of the pressure container 1, different requirements of the production environment for the noise and other actual situations, so as to achieve the best pressure relief effect and noise control effect, and improve the adaptability and universality of the device.
[0034] Specifically, the muffler 5 includes a resistive muffler 5. The resistive muffler 5 used mainly utilizes sound-absorbing materials to achieve the purpose of muffling. The sound-absorbing materials usually have a porous and loose structure, such as glass wool, rock wool, slag wool, sponge, fiber, metal filter screen, metal sintered screen, etc. When the sound wave enters the muffler 5, it will cause the air molecules in the pores of the sound-absorbing material to vibrate. Due to the friction between air and solid material and the viscous resistance between air molecules, a part of the sound energy is converted into heat energy and dissipated, thereby achieving the effect of muffling. That is, the porous medium structure is used to realize the loss of sound energy, thereby reducing noise, and at the same time, the porous medium can hinder the flow of fluid and reduce the flow rate of fluid inside the pipeline.
[0035] Therefore, the resistive muffler 5 has good muffling effect on medium and high frequency noise. In many industrial scenes and equipment, the use of the resistive muffler 5 can effectively reduce these noises, create a relatively quiet working environment for workers, reduce the harm of noise to human health, such as hearing impairment, cardiovascular disease, etc., and also reduce the noise pollution to the surrounding environment. Moreover, the structure of the resistive muffler 5 is usually relatively simple, mainly composed of an outer shell and internal sound-absorbing materials, without complex mechanical parts or electronic components, which makes it convenient to install and maintain. When installing, it only needs to be connected to the corresponding pipeline or equipment, without the need for complex debugging process.
[0036] Specifically, the porosity of the resistive muffler 5 is φ, and the range of the porosity φ is: 5%≤φ≤95%. It is found in actual use that when the porosity is too low, i.e. less than 5%, the sound-absorbing material has too few pores, the contact area and interaction opportunities of the sound wave with the sound-absorbing material are limited, the efficiency of converting sound energy into heat energy is low, and the sound-absorbing effect is poor. When the porosity is 5% or more, enough channels and contact areas are provided for the sound wave, so that the sound wave can fully propagate, reflect and attenuate in the pores, effectively absorbing sound energy. When the porosity exceeds 95%, the structure of the sound-absorbing material may be too loose, the strength and stability will be affected, it cannot be effectively fixed in the muffler 5, and it may cause the sound wave to directly penetrate the material without sufficient absorption and attenuation, which is not conducive to sound absorption.
[0037] Therefore, within this range of porosity, the resistive muffler 5 can have good absorption effect on noise of different frequencies. Generally speaking, the absorption effect of medium and high frequency sound waves is better when the porosity is higher, while low frequency sound waves can also be attenuated to a certain extent when the porosity is moderate, thereby effectively controlling a wider frequency range of noise and making the overall sound-absorbing performance of the muffler 5 more optimal.
[0038] In other specific solutions, the muffler 5 can be a composite muffler 5, which is composed of a resistive muffler 5 and at least one different type of muffler 5, including a reactive muffler 5, a diffuser muffler 5, or a resonant muffler 5. This configuration is mainly based on considerations such as widening the noise reduction frequency range and improving the noise reduction effect.
[0039] For example, resistive muffler 5 has a good absorption effect on mid-to-high frequency noise, but its absorption ability on low frequency noise is relatively weak. Reactive muffler 5 mainly has a good noise reduction effect on low frequency noise, while resonant muffler 5 has an outstanding suppression effect on noise at specific frequencies. Diffuse muffler 5 can effectively reduce the noise generated by high-speed airflow. Combining one or more of these with resistive muffler 5 can make up for the shortcomings of resistive muffler 5 in the low frequency band and cover a wider range of noise frequencies.
[0040] For example, in environments with complex noise sources and high noise intensity, a single type of silencer 5 may not achieve the desired noise reduction effect. Different types of silencers 5 operate on different principles, and when used in combination, they can process sound waves in multiple ways. For instance, a resistive silencer 5 converts sound energy into heat energy through sound-absorbing materials, while a reactive silencer 5 alters the propagation path and phase of sound waves to make them cancel each other out. Together, they can more effectively weaken noise and improve the overall noise reduction effect.
[0041] Specifically, a pressure sensor 6 is installed on the branch pipe 3 corresponding to the silencer 5, and the pressure sensor 6 is communicatively connected to the controller 2. This configuration allows the pressure sensor 6 to transmit pressure data to the controller 2. The controller 2 can analyze and judge the received pressure information according to preset rules and algorithms, and then issue corresponding control commands to achieve automatic control and adjustment of relevant equipment (such as valves) in the pipeline system. This enables the pressure relief device to operate under different conditions based on the actual pressure.
[0042] In this embodiment, the pressure relief device can adjust the flow distribution between the two branch pipes 3 according to the actual situation. To better understand how the flow distribution is performed, an example is provided:
[0043] For example, two branch pipes 3 can be depressurized simultaneously, and the branch pipe 3 equipped with a silencer 5 can pass through a larger flow rate to reduce the noise generated by this fluid using the silencer 5, while the branch pipe 3 without a silencer 5 can pass through a smaller flow rate to ensure the overall depressurization efficiency.
[0044] For example, the valve 4 in the branch pipe 3 with the silencer 5 can be opened first, while the valve 4 in the branch pipe 3 without the silencer 5 remains closed until the pressure sensor 6 detects that the pressure value has dropped to the preset pressure value. Then, the valve 4 in the branch pipe 3 without the silencer 5 is opened by the controller 2. By opening the valves one after the other, only the valve 4 in the branch pipe 3 with the silencer 5 is opened when the pressure is released. At this time, the fluid in the pressure vessel 1 is discharged through this branch pipe 3. Due to the effect of the silencer 5, the noise generated during the pressure release process can be effectively reduced. At higher pressure stages, the noise is often greater. This method can effectively control the noise during the noisiest stage, avoiding the huge noise generated by the direct discharge of a large amount of fluid under high pressure without noise reduction, and creating a relatively quiet atmosphere for the working environment. Furthermore, when the pressure sensor 6 detects that the pressure value has dropped to the preset pressure value, it opens the valve body 4 in the branch pipe 3 without the silencer 5. At this time, both pipes depressurize simultaneously. Compared with depressurizing only through the pipe with the silencer 5, this increases the depressurization channel, which can speed up the depressurization speed and improve the depressurization efficiency. This allows the pressure vessel 1 to complete the depressurization process more quickly and enter the subsequent operation stage, thereby improving the overall work efficiency.
[0045] For example, the valve 4 in the branch pipe 3 with the silencer 5 is opened first, while the valve 4 in the branch pipe 3 without the silencer 5 remains closed until the pressure sensor 6 detects that the pressure value has dropped to a preset pressure value. Then, the controller 2 opens the valve 4 in the branch pipe 3 without the silencer 5 and closes the valve 4 in the branch pipe 3 with the silencer 5. The purpose of this setting is that, in the initial stage of pressure relief, opening the branch pipe 3 with the silencer 5 can effectively eliminate the strong noise generated by the fluid discharge under high pressure. Because the fluid velocity is fast and the flow rate is large when the pressure is high, the noise generated is also greater. The silencer 5 plays a key role in this stage, which can minimize the impact of this noise on the working environment and personnel. Furthermore, once the pressure drops to the preset value, the pipeline with the silencer 5 is shut off. At this point, the noise is minimal, preventing the silencer 5 from continuing to operate even at low pressure. Fluid that does not generate excessive noise is quickly discharged through the pipeline without the silencer 5, thus preventing the silencer 5 from continuing to operate unnecessarily, extending its service life, and ensuring that the silencer 5 can achieve the best noise reduction effect during the most critical high-pressure phase.
[0046] In different specific implementations, this can be achieved through controller 2.
[0047] Specifically, the controller 2 is used to first open the valve body 4 in the branch pipe 3 with the silencer 5, and keep the valve body 4 in the branch pipe 3 without the silencer 5 closed until the pressure sensor 6 detects that the pressure value has dropped to the preset pressure value, then the controller 2 opens the valve body 4 in the branch pipe 3 without the silencer 5.
[0048] Alternatively, specifically, the controller 2 is used to first open the valve body 4 in the branch pipe 3 with the silencer 5, and keep the valve body 4 in the branch pipe 3 without the silencer 5 closed until the pressure sensor 6 detects that the pressure value has dropped to the preset pressure value. Then, the controller 2 opens the valve body 4 in the branch pipe 3 without the silencer 5 and closes the valve body 4 in the branch pipe 3 with the silencer 5.
[0049] It should also be noted that, specifically, the preset pressure value is set and stored in the controller 2, and the preset pressure value is between the initial pressure value inside the pressure vessel 1 and the pressure value at the outlet 7. Therefore, subsequent operations will only be performed when the pressure vessel 1 is depressurized to a certain extent, that is, when the actual depressurized pressure value reaches the preset pressure value. For example, the valve body 4 in the branch pipe 3 without the silencer 5 will be opened after the controller 2; or, the valve body 4 in the branch pipe 3 without the silencer 5 will be opened after the controller 2, and the valve body 4 in the branch pipe 3 with the silencer 5 will be closed.
[0050] Specifically, in the branch pipe 3 corresponding to the silencer 5, the pressure sensor 6 is located on the side closer to the pressure vessel 1, and the valve body 4 is located between the pressure sensor 6 and the silencer 5. This arrangement, placing the pressure sensor 6 closer to the pressure vessel 1, allows for immediate acquisition of the pressure at the outlet of the pressure vessel 1. This pressure best reflects the source state of the system pressure, providing the most direct and accurate data for subsequent control and regulation, thus precisely determining the system's pressure baseline. Furthermore, this layout allows the controller 2 to directly regulate the fluid pressure before entering the silencer 5 by controlling the opening and closing degree of the valve body 4 or adjusting its flow characteristics based on the pressure data acquired by the pressure sensor 6. Because the valve body 4 is located between the pressure sensor 6 and the silencer 5, it can promptly and effectively control the fluid flowing to the silencer 5 based on pressure feedback information, ensuring that the silencer 5 operates under appropriate pressure conditions.
[0051] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.
Claims
1. A pressure relief device, characterized in that, It includes a main pipeline and a controller (2), one end of which is connected to a pressure vessel (1) and the other end is an outlet (7); The main pipeline includes two parallel branch pipelines (3), each branch pipeline (3) is equipped with a valve body (4) for controlling the flow rate, the two valve bodies (4) are connected in communication with the controller (2), and only one of the two branch pipelines (3) is equipped with a silencer (5).
2. The pressure relief device according to claim 1, characterized in that, The muffler (5) includes a resistive muffler (5).
3. A pressure relief device according to claim 2, characterized in that, The porosity of the resistive muffler (5) is φ, wherein the porosity φ ranges from 5% to 95%.
4. A pressure relief device according to claim 3, characterized in that, The porosity of the resistive muffler (5) is φ, and the porosity φ is 60%.
5. A pressure relief device according to claim 1, characterized in that, The muffler (5) is a composite muffler (5), which is formed by combining a resistive muffler (5) with at least one different type of muffler (5), including a reactive muffler (5), a diffusion muffler (5) or a resonant muffler (5).
6. A pressure relief device according to any one of claims 1-5, characterized in that, A pressure sensor (6) is installed on the corresponding branch pipe (3) with a silencer (5), and the pressure sensor (6) is communicatively connected to the controller (2).
7. A pressure relief device according to claim 6, characterized in that, In the corresponding branch line (3) with a silencer (5), the pressure sensor (6) is located on the side close to the pressure vessel (1), and the valve body (4) is located between the pressure sensor (6) and the silencer (5).
8. A pressure relief device according to claim 6, characterized in that, The controller (2) is used to first open the valve body (4) in the branch pipe (3) with the silencer (5), and keep the valve body (4) in the branch pipe (3) without the silencer (5) closed until the pressure sensor (6) detects that the pressure value has dropped to the preset pressure value, and then open the valve body (4) in the branch pipe (3) without the silencer (5) through the controller (2).
9. A pressure relief device according to claim 6, characterized in that, The controller (2) is used to first open the valve body (4) in the branch pipe (3) with the silencer (5), and keep the valve body (4) in the branch pipe (3) without the silencer (5) closed until the pressure sensor (6) detects that the pressure value has dropped to the preset pressure value. Then, the controller (2) opens the valve body (4) in the branch pipe (3) without the silencer (5) and closes the valve body (4) in the branch pipe (3) with the silencer (5).
10. A pressure relief device according to claim 8 or 9, characterized in that, The preset pressure value is set and stored in the controller (2), and the preset pressure value is between the initial pressure value inside the pressure vessel (1) and the pressure value at the outlet (7).