WO2023098596A1 - Soupape antidéflagrante - Google Patents

Soupape antidéflagrante Download PDF

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Publication number
WO2023098596A1
WO2023098596A1 PCT/CN2022/134480 CN2022134480W WO2023098596A1 WO 2023098596 A1 WO2023098596 A1 WO 2023098596A1 CN 2022134480 W CN2022134480 W CN 2022134480W WO 2023098596 A1 WO2023098596 A1 WO 2023098596A1
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WO
WIPO (PCT)
Prior art keywords
valve
opening
explosion
valve body
main body
Prior art date
Application number
PCT/CN2022/134480
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English (en)
Chinese (zh)
Inventor
黄祥斌
吴自强
Original Assignee
宁德时代新能源科技股份有限公司
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2023098596A1 publication Critical patent/WO2023098596A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H01M50/333—Spring-loaded vent valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the application belongs to the field of valves, in particular to an explosion-proof valve.
  • explosion-proof valves as a pressure relief device, are widely used in various industries. For example, installing an explosion-proof valve in the battery pack can effectively avoid explosion accidents caused by a sharp increase in the pressure inside the battery pack.
  • the setting of the explosion-proof valve may easily cause external moisture to enter the battery pack, resulting in damage to the electronic components in the battery pack.
  • An embodiment of the present application provides an explosion-proof valve to solve the problem that external moisture enters equipment such as a battery pack along the explosion-proof valve, causing damage to electronic components.
  • an explosion-proof valve including:
  • valve body has an accommodation chamber, the first end surface of the valve body is provided with a first opening, the second end surface of the valve body is provided with a second opening, and the first opening, the accommodation chamber and the second opening are connected in sequence;
  • Hygroscopic piece the hygroscopic piece is arranged in the accommodation chamber;
  • the valve core assembly is connected with the valve body, and the valve core assembly slides between the first position and the second position relative to the valve body. position, the spool assembly moves away from the first opening.
  • the explosion-proof valve provided by the embodiment of the present application includes a valve body, a hygroscopic member, and a valve core assembly, the valve body has an accommodation cavity, the first end surface of the valve body is provided with a first opening, and the second end surface of the valve body is provided with a second opening , the first opening, the accommodating chamber and the second opening are communicated in sequence, the moisture-absorbing member is arranged in the accommodating chamber, the valve core assembly is connected with the valve body, and the valve core assembly slides between the first position and the second position relative to the valve body. In the first position, the valve core assembly is covered on the first opening, and in the second position, the valve core assembly moves away from the first opening.
  • the sliding connection between the valve body and the valve core assembly can realize the process of explosion-proof and pressure relief.
  • the moisture absorbing member can absorb the moisture entering the containing cavity, so as to avoid moisture damage to the battery, for example.
  • the hygroscopic element needs to be replaced, there is no need to disassemble the battery pack and other equipment, thereby helping to improve the replacement efficiency of the hygroscopic element.
  • the explosion-proof valve further includes a balance valve assembly, a third opening is provided on the third end surface of the valve body, and the third opening communicates with the containing chamber, and the balance valve assembly is fixedly connected to the valve body in the third opening.
  • the third end surface of the valve body is provided with a third opening, and a balance valve assembly is arranged in the third opening, which can balance the internal and external pressure of the explosion-proof valve through the balance valve assembly when the internal pressure difference of the explosion-proof valve is small, and improve the working efficiency of the explosion-proof valve. safety.
  • the balance valve assembly includes a valve plate, a protective frame fixedly connected to the valve body is arranged in the third opening, and the valve plate is arranged on a side of the protective frame away from the accommodating cavity;
  • the valve plate includes a valve body and a movable part that are movably connected.
  • the valve body is fixedly connected to the protective frame. .
  • This embodiment enables the hygroscopic member to fully absorb the moisture in the air entering the accommodating cavity, prevents the moisture from reaching the inside of the equipment such as the battery pack, and effectively protects the electronic components inside the equipment such as the battery pack.
  • the balance valve assembly further includes a limit frame, and the limit frame presses the main body of the valve plate onto the protective frame;
  • the main body of the valve plate can be reliably pressed on the protective frame, and a corresponding movement space can be provided for the movable part, thereby helping to improve the working reliability of the balance valve assembly.
  • the explosion-proof valve also includes a waterproof and breathable membrane and pressure strips;
  • the waterproof breathable membrane and the bead are arranged on the side of the limiting frame away from the valve plate, the bead is fixedly connected with the valve body, and the bead presses the waterproof and breathable membrane on the limit frame.
  • This embodiment can reduce the moisture content reaching the accommodating chamber, thereby also helping to improve the service life of the hygroscopic element.
  • valve body includes a main body and a boss part, and the boss part is fixedly connected to the peripheral surface of the main body;
  • first end surface and the second end surface are two opposite end surfaces of the main body in the height direction, the peripheral surface of the main body is located between the first end surface and the second end surface, and the third end surface is the part of the boss part away from the main body. end face.
  • the third opening can have a larger axial length, thereby facilitating the assembly of components such as the balance valve assembly in the third opening.
  • the valve body includes a main body and a guide part, the accommodating cavity is located in the main body, the guiding part is fixedly connected to the main body in the accommodating cavity, and the valve core assembly is slidably connected to the guiding part.
  • the valve body includes a guide portion, which can be used to guide the movement of the valve core assembly, thereby helping to improve the reliability of the valve core assembly moving between the first position and the second position.
  • valve core assembly includes a push rod, a cover plate and an elastic member, and the push rod is fixedly connected to the cover plate;
  • the push rod is slidably connected in the guide hole, and the two ends of the elastic member are respectively connected to the guide part and the push rod. set at the first opening.
  • This embodiment can improve the working reliability of the explosion-proof valve.
  • valve body further includes a limiting part, which is fixedly connected to the main body in the accommodating cavity, and the limiting part presses the hygroscopic component on the inner wall of the accommodating cavity.
  • the setting of the limiting part helps to better fix the hygroscopic component and the valve body, and improves the stability of the overall structure of the explosion-proof valve.
  • the explosion-proof valve further includes a tray, which is fixedly connected with the valve body at the second opening.
  • a tray is provided at the second opening to connect with the valve body, so that structures such as the hygroscopic component can be confined in the accommodating cavity, and the stability of the overall structure of the explosion-proof valve can be improved.
  • Fig. 1 is the structural representation of explosion-proof valve in the related art
  • Fig. 2 is a schematic diagram of the three-dimensional structure of the explosion-proof valve provided by the embodiment of the present application;
  • Fig. 3 is a top view of the explosion-proof valve provided by the embodiment of the present application.
  • Fig. 4 is a sectional view along A-A direction in Fig. 3;
  • FIG. 5 is a partial detailed view of the balance valve assembly
  • Fig. 6 is a structural schematic diagram of the valve plate in the balance valve assembly.
  • Fig. 1 Shown in Fig. 1: 10-valve body, 20-spool assembly, 21-first opening, 30-spring, 40-sealing washer.
  • 2 to 6 show: 100-valve body, 110-accommodating chamber, 121-first end face, 122-first opening, 131-second end face, 132-second opening, 141-third end face, 142 -Third opening, 151-main body, 152-boss, 153-guide, 154-skirt, 155-limiting part, 200-absorbent, 300-spool assembly, 310-push rod, 320- Cover plate, 330-elastic part, 400-balance valve assembly, 410-valve plate, 411-valve plate main body, 412-movable part, 413-normally open hole, 420-protective frame, 430-limiting frame, 510- Waterproof and breathable membrane, 520-layer, 600-tray.
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • explosion-proof valves are widely used in various industries, such as battery packs, pipelines or instruments. To simplify the description, the following will mainly take the application of the explosion-proof valve in the battery pack as an example.
  • FIG. 1 is a structural diagram of an explosion-proof valve in the related art, which includes a valve body 10, a valve core assembly 20, a spring 30, a sealing washer 40, and the like.
  • valve body 10 is provided with openings (not shown in the figure), under normal working conditions, such as when the internal pressure of the battery pack is low, the valve core assembly 20 is covered by the valve body 10 under the action of the spring 30 on the opening. And when the internal pressure of the battery pack is higher than a pressure threshold, the internal and external pressure difference acts on the valve core assembly 20, which can overcome the elastic force of the spring 30, so that the valve core assembly 20 moves away from the opening of the valve body 10 and passes through the opening. Release the pressure in the battery pack.
  • the opening in the valve core assembly 20 can be called the first opening 21, the valve body 10
  • the opening on the top can be referred to as a second opening.
  • the first opening 21 can be used to balance the pressure difference inside and outside the battery pack.
  • valve core assembly 20 When the pressure in the battery pack is higher than a pressure threshold, the valve core assembly 20 will move away from the second opening and release the pressure through the second opening. When the internal and external pressure difference of the battery pack is small, the internal and external pressure difference is balanced through the first opening 21 .
  • the inside of the battery pack may communicate with the external environment through the first opening 21 or the second opening, so that moisture in the external environment may enter the inside of the battery pack.
  • the inside of the battery pack will exchange with the outside air, and the air in the environment contains a certain proportion of moisture. condensation.
  • Moisture entering the inside of the battery pack will adversely affect the operation of the electronic components inside the battery pack, and even cause damage to the electronic components.
  • a hygroscopic agent is usually provided inside the battery pack to avoid damage to electronic components caused by external moisture.
  • the moisture absorption capacity of the hygroscopic agent has an upper limit, when the hygroscopic agent is fully absorbed, the hygroscopic agent needs to be replaced.
  • the battery pack needs to be disassembled for replacement, which leads to low replacement efficiency of the hygroscopic agent.
  • the embodiment of the present application provides an explosion-proof valve, as shown in Figure 2 to Figure 4, the explosion-proof valve includes:
  • the valve body 100 has an accommodating chamber 110 in the valve body 100, the first end surface 121 of the valve body 100 is provided with a first opening 122, the second end surface 131 of the valve body 100 is provided with a second opening 132, the first opening 122, the accommodating chamber 110 and the second opening 132 communicate in turn;
  • Hygroscopic piece 200 the hygroscopic piece 200 is arranged in the accommodation cavity 110;
  • valve core assembly 300 The valve core assembly 300, the valve core assembly 300 is connected with the valve body 100, the valve core assembly 300 slides between the first position and the second position relative to the valve body 100, in the first position, the valve core assembly 300 is covered by the second An opening 122 , when in the second position, the spool assembly 300 moves away from the first opening 122 .
  • the explosion-proof valve can be applied to equipment such as battery packs, pipes, or instruments, and is not specifically limited here. To simplify the description, the following will mainly illustrate the application of the explosion-proof valve in the battery pack as an example.
  • the valve body 100 of the explosion-proof valve can be constructed with a certain strength and rigidity, so as to support the valve core assembly 300 and other structures, and has a certain ability to resist external damage.
  • the valve body 100 may have an accommodating chamber 110, a first end surface 121 and a second end surface 131, the first end surface 121 is provided with a first opening 122, the second end surface 131 is provided with a second opening 132, the first opening 122, the accommodating chamber 110 and the second opening 132 communicate in sequence.
  • the second end face 131 may be an end face for assembling with the battery pack, and the shape of the end face may match the shape of the battery pack, so that the explosion-proof valve and the battery pack can be reliably connected. assembly. When the two are assembled, the inside of the battery pack can communicate with the receiving chamber 110 through the second opening 132 .
  • the first opening 122 in the first end surface 121 can be used to communicate the receiving chamber 110 with the external environment of the battery pack.
  • the first end surface 121 may be an opposite surface to the second end surface 131 , or may be an adjacent surface to the second end surface 131 , which is not specifically limited here.
  • the shapes of the first opening 122 and the second opening 132 can be rectangular, circular or other shapes, which can be designed according to actual needs.
  • the second opening 132 , the accommodating chamber 110 and the first opening 122 may constitute a passage for pressure relief inside the battery pack.
  • a hygroscopic member 200 may be disposed in the housing chamber 110 of the valve body 100, and the hygroscopic member 200 may include an organic or inorganic hygroscopic agent, which is not limited here.
  • the hygroscopic element 200 may include a hygroscopic agent and a porous container, and the hygroscopic agent may be filled in the porous container and fixed on the valve body 100 together with the porous container, or placed in the accommodating cavity 110 .
  • the hygroscopic element 200 may also include a hygroscopic agent and a binder resin, and the hygroscopic agent and the adhesive resin are bonded to form the hygroscopic element 200 with a relatively fixed shape, and assembled into the accommodating cavity 110 .
  • the valve core assembly 300 is slidingly connected with the valve body 100 , and the valve core assembly 300 slides between a first position and a second position relative to the valve body 100 .
  • valve core assembly 300 When the valve core assembly 300 is at the first position, the valve core assembly 300 can cover the first opening 122 .
  • the spool assembly 300 can be a structure with certain strength and rigidity. When the cover is installed on the first opening 122, it can form a seal to the first opening 122, preventing the interior of the battery pack from communicating with the external space through the first opening 122.
  • valve core assembly 300 When the valve core assembly 300 is in the second position, the valve core assembly 300 can move away from the first opening 122 , so that the first opening 122 is exposed, and the inside of the battery pack can communicate with the external space through the first opening 122 . Combined with some practical application scenarios, when the pressure inside the battery pack is high, the pressure difference inside and outside the battery pack can push the spool assembly 300 away from the first opening 122 , thereby releasing the pressure on the battery pack.
  • the valve core assembly 300 may be provided with the above-mentioned first opening for balancing the internal and external pressure of the battery pack, or may not be provided with the first opening, which is not specifically limited here.
  • openings for balancing the internal and external pressures of the battery pack may be provided at other positions of the valve body 100 .
  • the explosion-proof valve includes a valve body 100, a hygroscopic member 200, and a valve core assembly 300.
  • the valve body 100 has a housing cavity 110, and the first end surface 121 of the valve body 100 is provided with a first opening 122.
  • the valve body 100 The second end surface 131 of the second end surface 131 is provided with a second opening 132, the first opening 122, the accommodating chamber 110 and the second opening 132 are connected in sequence, the hygroscopic member 200 is arranged in the accommodating chamber 110, the valve core assembly 300 is connected with the valve body 100, and the valve core The assembly 300 slides relative to the valve body 100 between a first position and a second position.
  • the valve core assembly 300 In the first position, the valve core assembly 300 covers the first opening 122. In the second position, the valve core assembly 300 moves away from the first opening 122. One opening 122 .
  • the sliding connection between the valve body 100 and the valve core assembly 300 can realize the process of explosion-proof pressure relief, and when the valve core assembly 300 moves away from the first opening 122, the moisture-absorbing member 200 can absorb moisture entering the accommodation chamber 110 , to prevent moisture from damaging the internal components of the device such as the battery pack, and at the same time, when the hygroscopic member 200 needs to be replaced, there is no need to disassemble the device such as the battery pack, thereby helping to improve the replacement efficiency of the hygroscopic member 200 .
  • the explosion-proof valve further includes a balance valve assembly 400, the third end surface 141 of the valve body 100 is provided with a third opening 142, and the balance valve assembly 400 is fixed to the valve body 100 in the third opening 142 connect.
  • the balance valve assembly 400 may be a structure for balancing the internal and external pressure of the battery pack.
  • the balance valve assembly 400 may be a single valve plate, or may also be a structure including a valve seat and a valve plate, etc., which is not specifically limited here.
  • the valve core assembly 300 can be kept at the first position, and the first opening 122 can be kept closed. At this time, the pressure inside and outside the battery pack can be balanced by the balance valve assembly 400 .
  • the third end surface 141 of the valve body 100 and the first end surface 121 may be the same end surface or different end surfaces.
  • a third opening 142 is disposed on the third end surface 141 , and the third opening 142 communicates with the receiving cavity 110 .
  • the shape of the third opening 142 can be set as required, and is not specifically limited here.
  • the balance valve assembly 400 can be fixedly connected with the valve body 100 in the third opening 142 .
  • the balance valve assembly 400 may include a valve seat and a valve plate, and the valve seat and the valve body 100 may be fixedly connected by welding, snap-fit connection or other methods.
  • the balance valve assembly 400 may include a valve plate, and the valve plate may be directly bonded or snap-fitted on the valve body 100 .
  • the third end surface 141 of the valve body 100 is provided with a third opening 142, and a balance valve assembly 400 is provided in the third opening 142, which can pass through the balance valve assembly 400 when the internal pressure difference of the explosion-proof valve is small. Balance the pressure inside and outside the explosion-proof valve to improve the safety of the explosion-proof valve.
  • the balance valve assembly 400 includes a valve plate 410 , and the third opening 142 is provided with a protective frame 420 fixedly connected with the valve body 100 , and the valve plate 410 is disposed far from the protective frame 420 .
  • the valve plate 410 includes a valve plate main body 411 and a movable part 412 that are movably connected.
  • the valve plate main body 411 is fixedly connected to the protective frame 420, and part of the movable part 412 is attached to the protective frame 420, so that the movable part 412 is far away from the protective frame 420.
  • the protective frame 420 can be a structure with a certain rigidity.
  • the protective frame 420 can be in the shape of a square or a square, and the specific shape can be set as required to ensure that the accommodating cavity can pass through the first It is sufficient that the three openings 142 communicate with the external environment.
  • connection method between the protective frame 420 and the valve body 100 it may be an integral connection or welding and the like.
  • the balance valve assembly 400 includes a valve plate 410, which may be a silicone valve plate 410 or a rubber valve plate 410, etc., which is not specifically limited here.
  • the valve plate 410 may include a valve plate main body 411 and a movable part 412 that are movably connected, wherein the valve plate main body 411 may be fixedly connected to the protective frame 420 , such as by bonding or hot pressing. on the protective frame 420.
  • the movable part 412 is movably connected with the valve main body 411 , which mainly means that the movable part 412 can move relative to the valve main body 411 .
  • the valve sheet 410 may be of a certain elastic or flexible structure. By cutting the valve sheet 410, the valve sheet 410 is divided into a valve sheet main body 411 and a movable part 412. One end of the movable part 412 remains connected to the valve sheet main body 411. The other end can move relative to the main body 411 of the valve plate, so that the size of the hole on the valve plate 410 changes.
  • the valve plate main body 411 is provided with an opening, and the movable part 412 can be bonded to one side of the opening, and the movable part 412 moves relative to the valve plate main body 411 to block or avoid the opening.
  • the valve plate 410 is disposed on a side of the protective frame 420 away from the accommodating chamber 110 , that is, the valve plate 410 may be disposed outside the protective frame 420 .
  • Part of the movable part 412 is attached to the protective frame 420.
  • the internal and external pressure difference can act on the movable part 412, and push the movable part 412 away from the protective frame 420 movement in the direction of .
  • the movable part 412 of the valve plate 410 can move unidirectionally relative to the valve plate main body 411 in a direction away from the protective frame 420 , and the balance valve assembly 400 can be roughly regarded as a one-way valve.
  • the balance valve assembly 400 is not an absolute one-way valve.
  • other normally open openings 413 can be provided on the valve plate main body 411; perhaps, the area of the movable part 412 will be smaller than the cross-sectional area of the opening on the valve plate main body 411, so that the movable part 412 and the valve plate main body 411 There are normally open gaps between the pore walls.
  • the movable part 412 when the internal pressure of the explosion-proof valve is greater than the external pressure, the movable part 412 can move outward, so that the opening area on the valve body increases and the exhaust rate increases. And when the internal pressure of the explosion-proof valve is lower than the external pressure, since the inward movement of the movable part 412 is hindered, the opening area on the valve body remains unchanged, so as to avoid excessive air intake rate, so that the hygroscopic member 200 can accommodate the entry
  • the moisture in the air in the cavity 110 is fully absorbed to prevent the moisture from reaching the inside of the equipment such as the battery pack, and effectively protect the electronic components inside the equipment such as the battery pack.
  • the balance valve assembly 400 further includes a limit frame 430 , and the limit frame 430 presses the valve plate main body 411 onto the protective frame 420 ;
  • the limiting frame 430 has a space for the movable part 412 to move in one direction.
  • the limiting frame 430 may be a structure with a certain strength, and the above-mentioned valve plate main body 411 may be arranged between the limiting frame 430 and the protective frame 420 .
  • the limiting frame 430 and the protective frame 420 can form a fixed position for the valve plate main body 411 .
  • the limiting frame 430 can be circular, rectangular or other shapes. In one example, the shape of the limiting frame 430 can match the cross-sectional shape of the third opening 142 , so that the limiting frame 430 can be embedded in the third opening 142 .
  • the connection between the limiting frame 430 and the valve body 100 may be through transition fit, welding or other means, which is not specifically limited here.
  • the limiting frame 430 may have a certain thickness, therefore, the limiting frame 430 may enclose and form a space for the movable part 412 to move in one direction.
  • the space may be a cubic space; when the limiting frame 430 is circular, the space may be a cylindrical space, etc.
  • the valve plate main body 411 can be reliably pressed on the protective frame 420 , and a corresponding movement space can be provided for the movable part 412 , thereby helping to improve the working reliability of the balance valve assembly 400 .
  • the explosion-proof valve further includes a waterproof breathable membrane 510 and a bead 520;
  • the waterproof breathable membrane 510 and the bead 520 are arranged on the side of the limiting frame 430 away from the valve plate 410 , the bead 520 is fixedly connected with the valve body 100 , and the bead 520 presses the waterproof and breathable membrane 510 on the limit frame 430 .
  • the waterproof and gas-permeable membrane 510 can allow air to penetrate, but has a certain waterproof ability. In this way, when the external air enters the accommodation chamber 110 from the third opening 142, the moisture can be isolated by the waterproof and breathable film 510, reducing the moisture content reaching the accommodation chamber 110, and further helping to increase the service life of the hygroscopic member 200.
  • the bead 520 may be a structure with a certain strength, and its specific shape may be a rectangle, a field shape or other shapes, which are not specifically limited here.
  • the waterproof and gas-permeable membrane 510 can be pressed on the side of the limiting frame 430 away from the valve plate 410 through the pressing bar 520 .
  • the above-mentioned bead 520 can be embedded in the third opening 142 , and the peripheral edges of the waterproof and breathable membrane 510 can be fixed between the bead 520 and the limiting frame 430 .
  • the waterproof and gas-permeable membrane 510 may be further fixed on the limiting frame 430 or the bead 520 by means of bonding, so as to improve the installation reliability of the waterproof and gas-permeable membrane 510 .
  • the valve body 100 includes a main body portion 151 and a boss portion 152, and the boss portion 152 is fixedly connected to the peripheral surface of the main body portion 151;
  • first end surface 121 and the second end surface 131 are two opposite end surfaces of the main body 151 in the height direction, the peripheral surface of the main body 151 is located between the first end surface 121 and the second end surface 131, and the third end surface 141 is convex. An end surface of the platform portion 152 away from the main body portion 151 .
  • the main body 151 of the valve body 100 can be in the shape of a cylinder or a truncated cone as a whole, and the first end surface 121 and the second end surface 131 can be two opposite end surfaces in the height direction of the main body 151.
  • a peripheral surface may exist between the first end surface 121 and the second end surface 131 .
  • the boss portion 152 can be connected to the peripheral surface of the main body portion 151 , and the specific connection method can be integrated connection or welding, etc., which is not specifically limited here.
  • the third end surface 141 is an end surface of the boss portion 152 away from the main body portion 151 , that is, the third opening 142 may be disposed in the boss portion 152 .
  • the third opening 142 can have a larger axial length, thereby facilitating the assembly of components such as the balance valve assembly 400 in the third opening 142 .
  • the first opening 122 and the third opening 142 are located on different end faces of the valve body 100.
  • the structure for balancing internal and external air pressure in normal working conditions and the structure for explosion-proof and pressure relief can be arranged relatively independently, which helps To reduce the difficulty of design and manufacture of explosion-proof valves.
  • the valve body 100 includes a main body portion 151 and a guide portion 153, the accommodating cavity 110 is located in the main body portion 151, and the guiding portion 153 is fixedly connected with the main body portion 151 in the accommodating cavity 110; the valve core assembly 300 It is slidably connected with the guide part 153 .
  • the valve body 100 may include a main body portion 151 and a guide portion 153 , wherein the above-mentioned accommodating cavity 110 may be located in the main body portion 151 .
  • the guide part 153 can be disposed in the receiving cavity 110 , and at the same time, the guide part 153 can be fixedly connected with the main body part 151 .
  • the guide part 153 and the main body part 151 may be integrally connected or fixed by welding or the like.
  • the guide part 153 is slidingly connected with the valve core assembly 300 , and the guide part 153 can provide guidance for the movement of the valve core assembly 300 .
  • the guide portion 153 may be provided with a guide hole or a guide groove, and the valve core assembly 300 may be slidably connected to the guide hole or the guide groove.
  • the valve body 100 includes a guide portion 153, which can be used to guide the movement of the valve core assembly 300, thereby facilitating the movement of the lift valve core assembly 300 between the first position and the second position. reliability.
  • the valve core assembly 300 includes a push rod 310, a cover plate 320 and an elastic member 330, and the push rod 310 is fixedly connected to the cover plate 320;
  • the guide part 153 is provided with a guide hole, and the push rod 310 is slidably connected in the guide hole.
  • the two ends of the elastic member 330 are connected to the guide part 153 and the push rod 310 respectively.
  • the cover plate 320 covers the first opening 122 .
  • Both the push rod 310 and the cover plate 320 can be structures with a certain rigidity, and both can be fixedly connected. In some examples, the push rod 310 and the cover plate 320 may be fixed by means of welding, screw connection or fastener connection.
  • the shape of the guide hole on the guide portion 153 is not specifically limited, for example, it may be circular or rectangular, and may match with the cross-sectional shape of the push rod 310 .
  • the elastic member 330 may be a spring or an elastic sheet, which is not specifically limited here. Taking the elastic member 330 as an example, as shown in Figure 4, the two ends of the spring can be respectively connected to the guide part 153 and the push rod 310, and when the spring is in the released state, a downward force can be generated on the push rod 310 and the end cover , so that the end cover is closed at the first opening 122 . At this moment, it corresponds to that the valve core assembly 300 is located at the first position.
  • valve core assembly 300 moves downward under the action of the elastic force of the elastic member 330 , and the end cap can be re-covered on the first opening 122 .
  • the valve core assembly 300 includes a push rod 310, a cover plate 320, and an elastic member 330.
  • the push rod 310 is slidably connected to the guide hole provided on the guide part 153, so as to limit the movement direction of the valve core assembly 300 to the pushing position.
  • the axis of the rod 310 is upward.
  • the elastic member 330 can set the end cap stabilizing cover on the first opening 122 when the pressure in the accommodation chamber 110 is low, so as to improve the working reliability of the explosion-proof valve.
  • the first opening 122 may be a stepped hole opened on the first end surface 121 , and when the valve core assembly 300 is in the first position, the peripheral edge of the end cap may fit on the stepped surface of the stepped hole.
  • a sealing ring may be further provided between the end cover and the stepped surface, so as to ensure that the end cover can reliably close the first opening 122 when the valve core assembly 300 is in the first position.
  • the valve body further includes a limiting portion 155 , which is fixedly connected to the main body portion 151 in the accommodating cavity 110 , and the limiting portion 155 presses the moisture-absorbing member 200 onto the accommodating cavity 110 . on the inner wall.
  • the limiting portion 155 and the main body portion 151 may be integrally connected or fixed by welding or the like, which is not specifically limited here.
  • the quantity of the limiting part 155 can be one or more.
  • the limiting portion 155 and the surrounding inner wall of the accommodating cavity 110 may be disposed opposite to each other, so that a space for placing the absorbent member 200 is formed between the limiting portion 155 and the inner wall of the accommodating cavity 110 .
  • the hygroscopic member 200 can be put into the accommodating chamber 110 from the second opening 132 of the valve body 100, and one end of the hygroscopic member 200 can be snapped into the limiting portion 155 and the accommodating chamber The space between the inner walls of the accommodating chamber 110 , so that the hygroscopic component 200 is reliably limited in the accommodating cavity 110 .
  • the setting of the limiting portion 155 helps to fix the hygroscopic component 200 and the valve body 100 better, and improves the stability of the overall structure of the explosion-proof valve.
  • the guiding portion 153 and the limiting portion 155 can be used together to press the absorbent member 200 on the inner wall of the accommodating cavity 110 .
  • the absorbent member 200 can be arranged around the push rod 310 so as to ensure the movement space of the push rod 310 in the axial direction and prevent the absorbent member 200 from interfering with the movement of the push rod.
  • the hygroscopic member 200 can be formed by bonding an adhesive resin and a hygroscopic agent, and has a relatively fixed shape as a whole.
  • An axial through hole is opened in the hygroscopic member 200, and the push rod 310 extends into the through hole. , so as to achieve the arrangement effect that the absorbent member 200 is surrounded by the push rod 310 .
  • the shape of the through hole in the absorbent member 200 may be cylindrical or conical, etc., which is not specifically limited here.
  • the hygroscopic element 200 may also include a porous container and a hygroscopic agent, and moisture may pass through the openings of the porous container and be absorbed by the hygroscopic agent inside the porous container.
  • the porous container can be fixed on the surrounding inner wall of the accommodating chamber 110 , and the moisture absorbent can be filled into the porous container, so that the hygroscopic element 200 is surrounded by the push rod 310 .
  • the explosion-proof valve further includes a tray 600 , and the tray 600 is fixedly connected to the valve body 100 at the second opening 132 .
  • the tray 600 may be a structure with a certain strength, and is fixedly connected with the valve body 100 at the second opening 132 .
  • the connection manner between the tray 600 and the valve body 100 may be welding, snap connection, bonding or fastener connection, etc., which is not specifically limited here.
  • the shape of the tray 600 can be designed as required, and in some examples, the shape of the tray 600 can match the shape of the second opening 132 .
  • an opening may be formed in the tray 600 to avoid completely closing the second opening 132 .
  • the number of openings on the tray 600 may be one or more, and the shape of the openings may be at least one of rectangle, arc, circle and the like, which are not specifically limited here.
  • the tray 600 is provided at the second opening 132 to connect with the valve body 100, so that structures such as the hygroscopic component 200 can be confined in the accommodating cavity 110, and the stability of the overall structure of the explosion-proof valve can be improved.
  • a skirt 160 is provided on a side of the main body 151 of the valve body 100 close to the second opening 132 , and the skirt 160 is arranged around the main body 151 .
  • the skirt 160 can be in contact with the battery pack and fixedly connected to the battery pack by fasteners or welding.
  • a sealing ring is disposed on the side of the skirt 160 close to the second opening 132 , and when the explosion-proof valve is assembled with the battery pack, the sealing ring can effectively ensure the tightness of the two after assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

Une soupape antidéflagrante comprend un corps de soupape (100), un élément d'absorption d'humidité (200) et un ensemble noyau de soupape (300). Une cavité de réception (110) est formée dans le corps de soupape (100), une première face d'extrémité (121) du corps de soupape (100) est dotée d'une première ouverture (122), une seconde face d'extrémité (131) du corps de soupape (100) est dotée d'une seconde ouverture (132), et la première ouverture (122), la cavité de réception (110) et la seconde ouverture (132) sont en communication séquentielle. L'élément d'absorption d'humidité (200) est agencé dans la cavité de réception (110). L'ensemble noyau de soupape (300) est relié au corps de soupape (100). L'ensemble noyau de soupape (300) coulisse entre une première position et une seconde position par rapport au corps de soupape (100). Lorsqu'il est au niveau de la première position, l'ensemble noyau de soupape (300) recouvre la première ouverture (122), et lorsqu'il est au niveau de la seconde position, l'ensemble noyau de soupape (300) s'éloigne de la première ouverture (122). La soupape antidéflagrante peut empêcher l'humidité d'endommager l'intérieur d'un dispositif de bloc-batterie et facilite le remplacement de l'élément d'absorption d'humidité.
PCT/CN2022/134480 2021-12-01 2022-11-25 Soupape antidéflagrante WO2023098596A1 (fr)

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Application Number Priority Date Filing Date Title
CN202123003978.8U CN216242528U (zh) 2021-12-01 2021-12-01 防爆阀
CN202123003978.8 2021-12-01

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Publication number Priority date Publication date Assignee Title
CN216242528U (zh) * 2021-12-01 2022-04-08 宁德时代新能源科技股份有限公司 防爆阀

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CN207441831U (zh) * 2017-11-29 2018-06-01 宁德时代新能源科技股份有限公司 平衡阀及电池箱
CN211145518U (zh) * 2019-12-09 2020-07-31 天津市捷威动力工业有限公司 一种自动补偿随动式组合防爆阀
CN111490212A (zh) * 2020-04-21 2020-08-04 东莞蒲微防水透气膜材料有限公司 一种防堵塞的防爆阀及其制备方法
CN112483694A (zh) * 2019-09-11 2021-03-12 江苏泛亚微透科技股份有限公司 一种可进行湿度管理的防爆阀及其应用
CN113270685A (zh) * 2021-06-02 2021-08-17 江苏泛亚微透科技股份有限公司 一种用于三元锂动力电池包的平衡吸湿防爆阀
CN216242528U (zh) * 2021-12-01 2022-04-08 宁德时代新能源科技股份有限公司 防爆阀

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018067204A (ja) * 2016-10-20 2018-04-26 株式会社不二工機 減圧弁
CN207441831U (zh) * 2017-11-29 2018-06-01 宁德时代新能源科技股份有限公司 平衡阀及电池箱
CN112483694A (zh) * 2019-09-11 2021-03-12 江苏泛亚微透科技股份有限公司 一种可进行湿度管理的防爆阀及其应用
CN211145518U (zh) * 2019-12-09 2020-07-31 天津市捷威动力工业有限公司 一种自动补偿随动式组合防爆阀
CN111490212A (zh) * 2020-04-21 2020-08-04 东莞蒲微防水透气膜材料有限公司 一种防堵塞的防爆阀及其制备方法
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CN216242528U (zh) * 2021-12-01 2022-04-08 宁德时代新能源科技股份有限公司 防爆阀

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