Low-pressure gas discharge device and energy storage cabinet

Abstract

The utility model relates to the technical field of energy storage, disclose a kind of low-pressure gas discharge device and energy storage cabinet, install at the exhaust port of battery pack, the low-pressure gas discharge device includes: support structure, the support structure is located at the exhaust port, and it has the ventilation slot through itself along vertical direction, the exhaust port is located in the ventilation slot and is communicated with the ventilation slot, and the gas generated in the battery pack can be discharged through the ventilation slot;Cover plate, the cover plate is set on the support structure with opening and closing, and the ventilation slot is formed to block, and the cover plate is in closed state when the compacting force formed to the support structure is less than the thrust formed to the cover plate when the gas generated in the battery pack. The utility model has the advantages that while realizing efficient and reliable discharge of low-pressure gas, it also has good sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage technology field especially, relates to a low pressure gas discharge device and energy storage cabinet. BACKGROUND

[0002] In the electrochemical energy storage system, when the battery pack occurs extreme failure such as thermal runaway, a large amount of flammable and explosive gas will be released. In order to prevent the accumulation of these dangerous gases inside the energy storage cabinet and cause fires, explosions and other disasters, a directional exhaust duct is usually provided inside the energy storage cabinet. In order to achieve effective and smooth discharge of the gas and comply with the safety principle of "upward and away from the key equipment", the exhaust outlet of such exhaust duct is generally arranged at the top or higher position of the side wall of the cabinet body. However, when the energy storage cabinet is applied to outdoor environment, the design of the exhaust port is easy to cause rainwater backflow and external environmental pollutants (such as humid air, dust, salt mist) to enter the cabinet, thereby causing internal electrical short circuit, equipment corrosion and system reliability decline and other problems. SUMMARY

[0003] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a low pressure gas discharge device and an energy storage cabinet which can realize efficient and reliable discharge of low pressure gas and also have good sealing performance.

[0004] The utility model solves its technical problem by adopting the technical scheme of providing a low pressure gas discharge device, which is installed at the exhaust port of a battery pack, and the low pressure gas discharge device comprises:

[0005] A support structure is arranged at the exhaust port and has a ventilation slot penetrating through itself in the vertical direction, the exhaust port is located in the ventilation slot and communicates with the ventilation slot, and the gas generated in the battery pack can be discharged through the ventilation slot;

[0006] A cover plate is arranged on the support structure in an openable and closable manner and forms a blockage to the ventilation slot, and the pressing force of the cover plate on the support structure in the closed state is less than the pushing force of the gas generated in the battery pack on the cover plate.

[0007] In the above low pressure gas discharge device, the cover plate is made of lightweight metal or alloy, and the thickness of the cover plate is 0.2-0.8 mm.

[0008] In the above low pressure gas discharge device, the cover plate is made of aluminum material.

[0009] In the above low pressure gas discharge device, a base plate is arranged at the exhaust port and has a through hole for the exhaust port to pass through, the support structure is arranged on the base plate, and one side of the cover plate is hinged to the base plate.

[0010] In the low-pressure gas discharge device, the substrate is provided with at least one positioning groove, the support structure is provided with at least one positioning part, the positioning part is inserted into the positioning groove, and the substrate is welded.

[0011] In the low-pressure gas discharge device, the cover plate is recessed away from the substrate and forms a groove, and the size of the groove is greater than the size of the support structure.

[0012] In the low-pressure gas discharge device, the groove has a mounting edge arranged in the circumferential direction, the cover plate and the substrate are hingedly connected through a hinge structure, one side of the hinge structure is detachably connected with the mounting edge, and the other side is detachably connected with the substrate.

[0013] In the low-pressure gas discharge device, the support structure is provided with an extension edge arranged in the circumferential direction away from the substrate, the extension edge extends horizontally from inside to outside, and abuts against the inner wall of the cover plate.

[0014] In the low-pressure gas discharge device, a waterproof gasket is arranged between the extension edge and the cover plate, one side of the waterproof gasket abuts against the extension edge, and the other side abuts against the inner wall of the cover plate.

[0015] The utility model discloses a technical scheme that solves the technical problems, and further provides a kind of energy storage cabinet, it includes cabinet, battery pack and exhaust duct are equipped in the cabinet, the exhaust duct includes air inlet and exhaust port, the air inlet is connected with the battery pack, exhaust port is located at the top of the cabinet, and the top of the cabinet is further equipped with the low-pressure gas discharge device.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] 1、In the utility model, by setting support structure and cover plate at the exhaust port of battery pack, the support structure has ventilation groove communicated with the exhaust port, and the cover plate is arranged on the support structure and can be opened and closed to block the ventilation groove, and the pressing force of the support structure on the cover plate in the closed state is less than the thrust of the gas in the battery pack on the cover plate. This design can effectively seal the exhaust port in normal state, realize waterproof, windproof and dustproof function; on the other hand, when abnormal situation such as thermal runaway occurs in the battery pack, the low-pressure gas generated inside can overcome the pressing force of the cover plate and automatically push the cover plate to open, so as to realize rapid and reliable discharge of gas, avoid accumulation of gas in the battery pack and cause fire or explosion and other safety accidents.

[0018] 2、In the utility model, the cover plate is made of light metal or alloy, and the thickness of the cover plate is 0.2mm-0.8mm. The design selects the material and controls the thickness of the cover plate, effectively reduces the weight and opening resistance of the cover plate under the premise of ensuring that the cover plate has certain structural strength and durability, makes the low-pressure gas more easily push the cover plate to open, thereby improving the response sensitivity and discharge efficiency of the exhaust device to low-pressure gas.

[0019] 3、In the utility model, the support structure is provided with an extension edge arranged in the circumferential direction on the side away from the base plate, and a waterproof gasket is arranged between the extension edge and the cover plate, one side of the waterproof gasket abuts against the extension edge, and the other side abuts against the inner wall of the cover plate. The design further enhances the sealing performance between the cover plate and the support structure, can effectively prevent external rainwater, dust and other pollutants from entering the inside of the battery pack, thereby significantly improving the protection level and environmental adaptability of the entire low-pressure gas exhaust device. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the low-pressure gas exhaust device of the utility model.

[0021] Figure 2 It is an exploded view of the low-pressure gas exhaust device of the utility model.

[0022] Figure 3 It is a sectional view of the low-pressure gas exhaust device of the utility model.

[0023] Figure 4 It is a structural schematic view of the energy storage cabinet of the utility model.

[0024] Figure 5 It is a connection state schematic view of the low-pressure gas exhaust device and the exhaust pipeline in the utility model.

[0025] In all the drawings, the same reference signs represent the same technical features, specifically:

[0026] 100, support structure; 110, ventilation slot; 120, positioning part; 130, extension edge; 200, cover plate; 210, groove; 211, mounting edge; 300, base plate; 310, through hole; 320, positioning groove; 330, fixing hole; 400, hinge structure; 500, waterproof gasket; 600, cabinet body; 700, exhaust pipeline; 710, exhaust port; 720, air inlet. DETAILED DESCRIPTION

[0027] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, in the present application, the description such as "first", "second", "one" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0030] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0032] As shown in the drawings, in the present embodiment, the low-pressure gas discharge device is installed at the exhaust port 710 of the battery pack, which comprises: Figures 1 to 5

[0033] a support structure 100 provided at the exhaust port 710 and having a ventilation slot 110 penetrating through itself in the vertical direction, the exhaust port 710 is located in the ventilation slot 110 and communicates with the ventilation slot 110, and the gas generated in the battery pack can be discharged through the ventilation slot 110;

[0034] ​A cover plate 200 is arranged on the support structure 100 in an openable and closable manner and forms a seal to the ventilation groove 110, and the pressing force of the cover plate 200 to the support structure 100 in the closed state is smaller than the pushing force of the gas generated in the battery pack to the cover plate 200. On the one hand, the cover plate 200 can form an effective seal to the exhaust port 710 in the normal state, realizing the functions of waterproofing, windproofing and dustproofing; on the other hand, when the battery pack has abnormal conditions such as thermal runaway, the low-pressure gas generated inside can overcome the pressing force of the cover plate 200 and automatically push the cover plate 200 to open, so as to realize the rapid and reliable discharge of the gas and avoid the accumulation of the gas in the battery pack to cause a safety accident such as combustion or explosion.

[0035] As shown in Figures 1 to 3 In this embodiment, the low-pressure gas discharge device includes a substrate 300, a support structure 100 and a cover plate 200 arranged in sequence from bottom to top. The substrate 300 serves as the installation basis of the entire device and is not only used for positioning and supporting the support structure 100 and the cover plate 200, but also avoids additional installation holes on the energy storage cabinet body through its own structural design, thereby simplifying the installation process and improving the sealing performance and structural integrity of the entire energy storage cabinet.

[0036] Further, the substrate 300 is rectangular and is horizontally welded at the exhaust port 710, ensuring the stability and sealing performance of the connection between the device and the cabinet 600. The substrate 300 is provided with a through hole 310 penetrating itself in the vertical direction, for the exhaust port 710 to pass through. The through hole 310 is coaxial with the exhaust port 710, so that the exhaust port 710 is in communication with the ventilation groove 110, thereby enabling the gas in the battery pack to pass through the ventilation groove 110 of the support structure 100 and be discharged.

[0037] Preferably, the shape of the through hole 310 is adapted to the shape of the exhaust port 710, and the size of the through hole 310 is adapted to the outer wall of the exhaust port 710. This design not only reduces the risk of gas leakage, but also avoids the possibility of external pollutants entering the battery pack due to excessive gap.

[0038] Further, the substrate 300 is provided with at least one positioning groove 320 extending in the vertical direction and penetrating the substrate 300, for forming a plug-in fit with the positioning part 120 on the support structure 100, thereby realizing the precise positioning and installation of the support structure 100 on the substrate 300. This design not only improves the assembly precision between the support structure 100 and the substrate 300, but also enhances the stability of their connection, which helps to improve the structural strength and sealing performance of the entire low-pressure gas discharge device.

[0039] Preferably, the positioning grooves 320 are in strip-shaped structures and are provided with four, which are arranged circumferentially along the through hole 310 to ensure that the support structure 100 is uniformly stressed and accurately positioned during installation, avoiding affecting the connectivity and sealing of the gas discharge channel due to deviation or inclination. In addition, the design of the strip-shaped positioning grooves 320 can facilitate the insertion of the positioning part 120 of the support structure 100 in the vertical direction, achieving rapid positioning and assembly.

[0040] Further, the substrate 300 is also provided with at least one circular fixing hole 330, which penetrates the substrate 300 in the vertical direction, used to form a detachable connection with the hinge structure 400 of the cover plate 200. This design can facilitate the disassembly and replacement of the cover plate 200 and the hinge structure 400, improving the maintainability and practicality of the entire device.

[0041] Preferably, the fixing hole 330 is provided with three and arranged in a straight line along the length direction of the hinge structure 400 to enhance the connection strength between the hinge structure 400 and the substrate 300, while ensuring the stability and consistency of the cover plate 200 during opening and closing.

[0042] In this embodiment, the support structure 100 is a rectangular frame structure, which is vertically arranged on the substrate 300, used to provide support for the cover plate 200 and serve as an important component of the gas discharge channel.

[0043] Further, the support structure 100 has a rectangular ventilation slot 110 penetrating itself in the vertical direction, which is connected with the battery pack exhaust port 710, thereby forming a continuous gas discharge channel from the inside of the battery pack to the external environment. This design not only provides an effective path for the discharge of internal gas of the battery pack, but also can form a good sealing fit with the inner wall of the cover plate 200 in the closed state of the cover plate 200, preventing rainwater, dust and other pollutants in the external environment from entering the inside of the battery pack.

[0044] Further, the side of the support structure 100 facing the substrate 300 is provided with at least one positioning part 120, which is inserted into the positioning groove 320 of the substrate 300, used to realize the precise positioning and assembly between the support structure 100 and the substrate 300. After positioning is completed, the positioning part 120 and the substrate 300 are fixedly connected by welding, thereby ensuring the installation stability and structural sealing of the support structure 100 on the substrate 300.

[0045] Preferably, the positioning part 120 is in a rectangular protruding shape, provided with four, which are respectively corresponding to the four strip-shaped positioning grooves 320 on the substrate 300 and are uniformly arranged along the circumference of the support structure 100. This design not only facilitates rapid alignment during assembly, but also makes the stress of the support structure 100 more uniform during installation, thereby effectively improving the structural stability and sealing reliability of its connection with the substrate 300.

[0046] Furthermore, the support structure 100 has a circumferentially arranged extension edge 130 on the side opposite to the substrate 300. This extension edge 130 extends horizontally from the inside to the outside and forms an abutment fit with the inner wall of the cover plate 200. This design provides a good support platform for the cover plate 200, while increasing the contact area between the cover plate 200 and the support structure 100, which is beneficial to improving the structural stability and sealing performance between the two, and further ensuring the long-term reliable operation of the device in complex environments.

[0047] Furthermore, a waterproof gasket 500 is provided between the extension edge 130 and the cover plate 200. This waterproof gasket 500 has a hollow rectangular structure, with one side abutting against the extension edge 130 and the other side abutting against the inner wall of the cover plate 200. This design further enhances the sealing performance between the cover plate 200 and the support structure 100, effectively preventing external rainwater, dust, and other contaminants from entering the battery pack, thereby significantly improving the protection level and environmental adaptability of the entire low-pressure gas emission device. In addition, the rectangular hollow structure design of the waterproof gasket 500 not only helps improve its compression resilience performance but also plays a certain role in tolerance compensation during assembly, thereby further improving sealing reliability.

[0048] In this embodiment, the cover plate 200 is closable and mounted on top of the support structure 100. When closed, it effectively seals the ventilation slot 110, preventing rainwater, dust, and other contaminants from the external environment from entering the battery pack. Simultaneously, when closed, the cover plate 200 exerts a certain clamping force on the support structure 100 due to its own weight. This clamping force is less than the thrust exerted on the inside of the cover plate 200 by the gas generated inside the battery pack during an abnormal situation (such as thermal runaway). Therefore, when gas is generated inside the battery pack due to an abnormal situation, the gas pressure acts on the inside of the cover plate 200, overcoming its own clamping force and automatically opening the cover plate 200, thereby achieving rapid and reliable gas discharge. This design requires no external power or control mechanism, relying solely on gas pressure to achieve the exhaust function, and has the advantages of simple structure, rapid response, and high reliability.

[0049] Furthermore, the opening and closing mechanism of the cover plate 200 can be either a flip-type or a sliding type. Preferably, a flip-type structure is adopted in this embodiment. One side is hinged to the base plate 300 or the support structure 100, and the other side can rotate around the hinge axis to realize the opening and closing action. This design not only facilitates operation, but also forms a good sealing fit with the support structure 100 in the closed state, further improving the sealing performance and structural stability of the overall device.

[0050] Preferably, the cover plate 200 is hinged to the base plate 300 via a hinge structure 400. This design is not only simple in structure and easy to assemble, but also ensures the stability of the cover plate 200 during opening and closing, while maintaining a good sealing fit with the support structure 100 in the closed state.

[0051] Furthermore, the cover plate 200 has a rectangular structure and is recessed in a direction away from the substrate 300, forming a groove 210 with a size larger than that of the support structure 100. The design of this groove 210 not only enhances the structural strength of the cover plate 200 itself, making it less prone to deformation when subjected to gas impact, but also provides a certain amount of accommodation space for the support structure 100, improving assembly accuracy and sealing performance.

[0052] Furthermore, the groove 210 has a mounting edge 211 arranged circumferentially, which is perpendicular to the substrate 300. The mounting edge 211 not only serves as a fixed connection point for the hinge structure 400, enabling the cover plate 200 to be hinged to the substrate 300 or the support structure 100, but also forms a sealing edge structure for the support structure 100 when the cover plate 200 is closed, further enhancing the sealing fit between the cover plate 200 and the support structure 100, and improving the waterproof performance and structural stability of the entire device.

[0053] Furthermore, the cover plate 200 is made of lightweight metal or alloy, specifically one or more lightweight metals such as aluminum, magnesium, titanium, and copper, to balance structural strength, corrosion resistance, and lightweight requirements. Preferably, in this embodiment, the cover plate 200 is made of aluminum, which has good processing performance, weather resistance, and thermal conductivity, making it suitable for long-term use in various complex environments.

[0054] Furthermore, the thickness of the cover plate 200 is 0.2mm-0.8mm. This thickness range, while ensuring that the cover plate 200 has a certain structural strength and resistance to deformation, effectively reduces the overall weight and opening resistance of the cover plate 200, making it easier for low-pressure gas to push the cover plate 200 open, thereby improving the response sensitivity and emission efficiency of the exhaust device to low-pressure gas.

[0055] In this embodiment, one side of the hinge structure 400 is detachably connected to the mounting edge 211 of the cover plate 200 via fasteners, and the other side is similarly detachably connected to the fixing hole 330 of the base plate 300 via fasteners. This design not only facilitates assembly and disassembly but also provides convenience for later maintenance, replacement of the cover plate 200, or adjustment of sealing performance, thereby improving the maintainability and modularity of the entire low-pressure gas emission device.

[0056] like Figures 1 to 5As shown in the figure, based on the above-described embodiment of the low-pressure gas emission device, this utility model also provides an energy storage cabinet, which includes a cabinet body 600. A battery pack (not shown in the figure) and an exhaust pipe 700 are disposed inside the cabinet body 600. The exhaust pipe 700 includes an inlet 720 and an outlet 710. The inlet 720 is connected to the battery pack, and the outlet 710 is located at the top of the cabinet body 600. In this energy storage cabinet, the top of the cabinet body 600 is further provided with the aforementioned low-pressure gas emission device, which is arranged opposite to the outlet 710 to achieve rapid and safe emission of abnormal gases inside the battery pack. By installing the low-pressure gas emission device at the outlet 710, it can automatically respond to the internal gas pressure and push the cover 200 to open when the battery pack experiences abnormal conditions such as thermal runaway, rapidly venting the gas to the external environment, thereby effectively avoiding the safety risks caused by gas accumulation inside the cabinet body 600.

[0057] In this embodiment, low-pressure gas refers to the internal gas generated by the battery pack under abnormal operating conditions (such as the initial stage of thermal runaway), and its pressure range is usually 0.08kPa-0.16kPa.

Claims

1. A low-pressure gas emission device, installed at the exhaust port (710) of a battery pack, characterized in that, The low-pressure gas emission device includes: A support structure (100) is provided at the exhaust port (710) and has a ventilation slot (110) that runs through it in a vertical direction. The exhaust port (710) is located in the ventilation slot (110) and communicates with the ventilation slot (110). Gas generated in the battery pack can be discharged through the ventilation slot (110). A cover plate (200) is provided on the support structure (100) in an openable and closable manner, and blocks the ventilation slot (110). When the cover plate (200) is closed, the pressing force exerted on the support structure (100) by the cover plate (200) is less than the thrust exerted on the cover plate (200) when gas is generated inside the battery pack.

2. The low-pressure gas emission device according to claim 1, characterized in that, The cover plate (200) is made of lightweight metal or alloy, and the thickness of the cover plate (200) is 0.2mm-0.8mm.

3. The low-pressure gas emission device according to claim 2, characterized in that, The cover plate (200) is made of aluminum.

4. A low-pressure gas emission device according to claim 1, characterized in that, The system includes a substrate (300) disposed at the exhaust port (710) and having a through hole (310) through which the exhaust port (710) passes. The support structure (100) is disposed on the substrate (300), and one side of the cover plate (200) is hinged to the substrate (300).

5. A low-pressure gas emission device according to claim 4, characterized in that, The substrate (300) is provided with at least one positioning groove (320), and the support structure (100) is provided with at least one positioning part (120). The positioning part (120) is inserted into the positioning groove (320) and welded to the substrate (300).

6. A low-pressure gas emission device according to claim 4, characterized in that, The cover plate (200) is recessed in a direction away from the substrate (300) and forms a groove (210), the size of which is larger than the size of the support structure (100).

7. A low-pressure gas emission device according to claim 6, characterized in that, The groove (210) has a mounting edge (211) arranged circumferentially. The cover plate (200) and the base plate (300) are hinged by a hinge structure (400). One side of the hinge structure (400) is detachably connected to the mounting edge (211), and the other side is detachably connected to the base plate (300).

8. A low-pressure gas emission device according to claim 4, characterized in that, The support structure (100) has a circumferentially arranged extension edge (130) on the side away from the substrate (300). The extension edge (130) extends horizontally from the inside to the outside and abuts against the inner wall of the cover plate (200).

9. A low-pressure gas emission device according to claim 8, characterized in that, A waterproof gasket (500) is provided between the extension edge (130) and the cover plate (200). One side of the waterproof gasket (500) abuts against the extension edge (130), and the other side abuts against the inner wall of the cover plate (200).

10. An energy storage cabinet, characterized in that, The device includes a cabinet (600), which contains a battery pack and an exhaust pipe (700). The exhaust pipe (700) includes an air inlet (720) and an exhaust outlet (710). The air inlet (720) is connected to the battery pack, and the exhaust outlet (710) is located at the top of the cabinet (600). The top of the cabinet (600) is also provided with a low-pressure gas emission device as described in any one of claims 1-9.

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