pressure relief valve

Abstract

According to the invention, a pressure relief valve is provided. The pressure relief valve comprises a bowl-shaped housing device having a bottom wall and an outer wall, the bottom wall having an annular sealing wall, wherein the sealing wall delimits a valve through opening; a cover device for covering a housing opening of the housing device opposite the bottom wall, the cover device having a diaphragm holding device extending in the direction of the bottom wall; a diaphragm device for covering the valve through opening, wherein the diaphragm device is connected with the diaphragm holding device and the diaphragm device is sealingly arranged on the annular sealing wall such that the valve through opening is closed.

Description

[0001] This invention relates to a pressure relief valve (pressure release valve).

[0002] Pressure relief valves protect pressurized spaces or pressure vessels from unacceptable pressure increases in pressure equipment or systems. If the pressure exceeds the response pressure, the gas, vapor, or liquid will be released into the atmosphere or collected in a collection pipe.

[0003] A pressure relief valve is a pressure-relieving device that responds when the pressure exceeds the maximum permissible operating pressure. When a predetermined excessive pressure is reached (e.g., 10% of the maximum permissible operating pressure), the safety valve must be fully opened. If the safety valve is properly sized, pressure buildup is controllable. After the excessive pressure is reduced by venting to the environment, the valve closes again, depending on the specific circumstances, and the system can continue to operate.

[0004] Pressure relief valves are also installed in battery housings used for batteries, especially in the housings of high-voltage batteries used in, for example, electric vehicles.

[0005] One object of the present invention is to provide an alternative to pressure relief valves known in the prior art.

[0006] Another object of the present invention is to provide a compact pressure relief valve that requires less installation space.

[0007] Another object of the present invention is to design a pressure relief valve that is safe and reliable in operation and is simple and inexpensive to manufacture.

[0008] One or more of these objectives are achieved by the features of independent claim 1. Advantageous constructions are given in the respective dependent claims.

[0009] According to the present invention, a pressure relief valve is provided. The pressure relief valve includes:

[0010] A bowl-shaped housing device having a bottom wall and an outer wall, the bottom wall including an annular sealing wall, wherein the sealing wall defines a valve through opening;

[0011] A cover device for covering a housing opening opposite the bottom wall of the housing device, the cover device having a diaphragm retaining device extending toward the bottom wall;

[0012] A diaphragm device for covering the valve through opening, wherein the diaphragm device is connected to the diaphragm retaining device and the diaphragm retaining device is hermetically disposed on the annular sealing wall so that the valve through opening is closed.

[0013] According to a first aspect of the invention, the valve through opening may have a circular cross-section, which does not have a support rod or the like.

[0014] In the context of this invention, the phrase "diaphragm device connected to diaphragm retaining device" is understood to mean that the diaphragm retaining device is at least loosely in contact with the diaphragm device or loosely or fixedly connected to the diaphragm device in the connection area, wherein the diaphragm device can be positioned and / or centered on the sealing wall or relative to the valve through opening by means of the diaphragm retaining device through appropriate structural configuration of the contact or connection area between the diaphragm retaining device and the diaphragm device.

[0015] Movement or vibration of the pressure relief valve, such as during operation or transport of a battery housing equipped with the pressure relief valve, may (unintentionally) cause the diaphragm of the pressure relief valve to move. In this process, the diaphragm may also deform. This presents the risk that the diaphragm assembly may lift off the sealing wall, or that undesirable gaps or openings may appear, at least partially opening the valve through-hole. The diaphragm retaining device and the connection between the diaphragm retaining device and the diaphragm assembly ensure that the radially surrounding (or radially circumferential) sealing edge of the diaphragm assembly is properly pre-positioned and located relative to the sealing wall defining the valve through-hole, and especially centered relative to the sealing wall. Furthermore, the valve through-hole is sealed closed by means of the diaphragm assembly.

[0016] The diaphragm device is connected to the diaphragm retaining device and the diaphragm retaining device is hermetically disposed on the annular sealing wall so that the valve through opening is closed. This actually provides a pressure relief valve with a particularly simple structure that is safe and reliable in operation and simple and cost-effective in production.

[0017] In particular, the pressure relief valve is characterized in that, on the one hand, a diaphragm retaining device is provided for setting (pre-positioning; positioning) and fixing or re-fastening the diaphragm device. On the other hand, the diaphragm device is mounted in the housing device by means of the diaphragm retaining device.

[0018] The diaphragm retaining device is further characterized in that, due to its size and, in particular, its extension and / or length in the direction of the bottom wall of the housing device, the diaphragm device can be pre-tensioned to seal and close the valve through opening.

[0019] Therefore, due to the structural design of the diaphragm retaining device, the diaphragm retaining device applies a predetermined force to the diaphragm device in the direction of the sealing wall, such that the diaphragm device is at least slightly compressed and the radially surrounding (or radially circumferentially) sealing edge of the diaphragm device is sealed against the sealing wall. Therefore, the desired predetermined opening pressure of the valve device can be set by the length of the diaphragm retaining device in the bottom wall direction and the pressure applied to the diaphragm device by the diaphragm retaining device.

[0020] The diaphragm device is preferably generally bell-shaped, spherical, or convex, whereby the edge of the diaphragm facing the bottom wall forms a radially circumferential (or radially periphery) sealing edge that, under pressure or a predetermined pretension, correspondingly seals the sealing wall of the valve through-hole and rests on the sealing wall.

[0021] Therefore, the diaphragm retaining device can be configured and sized such that a force is applied to the radially surrounding (or radially circumferentially) sealing edge or sealing lip of the diaphragm device in the direction of the sealing wall, so that the sealing edge is sealed against the sealing wall under pre-tension.

[0022] Therefore, only one component, the diaphragm retaining device, is integrally formed on the cover device. No other pressurizing or fastening devices, or arrangement or positioning devices, are required to seal the diaphragm device onto the valve through-hole or sealing wall.

[0023] The diaphragm device may include a connection or fastening recess in which the connection or fastening portion of the diaphragm retaining device is received in contact, or may be fastened by means of a press fit and / or a corresponding radially circumferential (or radially circumferential) locking edge and a correspondingly constructed radially circumferential (or radially circumferential) locking recess.

[0024] Specifically, according to a first aspect of the invention, a press-fit between the diaphragm device and the diaphragm holding device is provided in the connection region. However, additionally and / or alternatively, any type of locking connection may also be provided. This connection means that the diaphragm device can be easily, quickly, firmly, and reliably connected to the diaphragm holding device.

[0025] The fastening part can be a column with a preferred circular cross-section, and the fastening notch can be configured as a blind hole or a hole or a through opening.

[0026] In the region of the fastening portion, the diaphragm retaining device may include, in particular, a radially circumferential (or radially circumferential) annular pre-tensioned portion that extends substantially parallel to the diaphragm extension.

[0027] The pretensioning section is configured such that the larger the diameter of the pretensioning section, the greater the pretension force that positions the diaphragm device on the sealing wall of the valve through-opening. This means that the wider or larger the outer diameter of the annular pretensioning section, the shorter the free leg of the diaphragm device.

[0028] "Free leg" should be understood as the radially outward deformable length of the diaphragm device between the diaphragm retainer and the sealing edge, and therefore the sealing wall. The shorter the leg, the less deformable it is and the greater the pretension force applied by the diaphragm retainer, because the length of the freely movable leg is reduced. Clearly, the term "leg" refers to a movable or deformable portion of the diaphragm device, and therefore includes multiple radially circumferential (or radially surrounding) legs.

[0029] The diaphragm device may also only contact the diaphragm retaining device. Thus, the diaphragm device can be configured to have or not have a connection notch.

[0030] In this configuration, the connecting portion is an integral part of the pretensioning portion. Similar to the previous description, the larger the diameter of the pretensioning portion, the shorter the leg and the greater the corresponding pretensioning force.

[0031] In addition, the length or height of the diaphragm device and the diaphragm retaining device can be adjusted to apply a greater pretension force to the diaphragm device. The longer or higher the diaphragm retaining device extends in a direction orthogonal to the diaphragm device, the greater the force acting on the diaphragm device and the greater the corresponding pretension force.

[0032] The housing and / or cover assembly may include a through-hole for releasing excess pressure escaping from the valve through-hole.

[0033] The diameter of the outer wall of the housing device can be configured to be approximately less than 40 mm, or less than 35 mm, or less than 30 mm, or less than 25 mm, or less than 20 mm.

[0034] Especially when the orifice diameter of the carrier component is less than 20mm, the pressure relief valve can be constructed according to the above description.

[0035] This results in a very compact pressure relief valve.

[0036] According to a first aspect of the invention, this diameter is primarily designed for the pressure relief valve according to the invention. Here, only one valve through-hole can be constructed in the bottom wall.

[0037] In the context of this invention, "only one valve through opening" should be understood as meaning that the valve through opening is circular and does not include any web or support rod that interrupts the valve through opening, thereby not providing a receiving device for fixing the diaphragm device in the central region of the through opening.

[0038] According to a second aspect of the invention, in the region of the valve through opening, the bottom wall may include a centering ring, which includes a diaphragm receiving portion for receiving a pin of the diaphragm device in the region of the diaphragm device.

[0039] The diaphragm receiving part can be connected to the bottom wall via support rods, which are arranged radially around (or radially circumferentially) and spaced equidistantly from each other. The diaphragm receiving part, together with the support rods, forms a centering ring.

[0040] In addition, the diaphragm receiving portion can be configured as an annular shape with a through opening for receiving and / or connecting pins of the diaphragm device, or it can be configured as a disc shape with a blind hole for receiving and / or connecting pin portions of the diaphragm device.

[0041] The connection or contact between the centering ring and the diaphragm device also serves to set, position, and center the diaphragm device and its sealing edges on the sealing wall of the valve through-hole. The centering ring can be particularly useful and advantageous for larger pressure relief valves.

[0042] The pressure relief valve according to the second aspect of the invention is particularly provided for larger valves, wherein the diameter of the outer wall of the housing assembly can be configured to be approximately greater than 25 mm, or greater than 30 mm, or greater than 35 mm, or greater than 40 mm, or greater than 45 mm, or greater than 50 mm, or greater than 55 mm, or greater than 60 mm.

[0043] An annular mounting flange may be provided in the area of ​​the bottom wall, wherein a sealing device, preferably a TPE seal or an O-ring seal, is provided between the carrier member and the mounting flange.

[0044] The mounting flange allows the pressure relief valve to be connected to the carrier component in a safe and reliable sealing manner, thereby providing an annular sealing device for sealing.

[0045] At least three locking elements for securing to the carrier member may be arranged on the outer wall in a radially circumferential (or radially circumferential) manner and preferably spaced equidistantly from each other, wherein each of these locking elements preferably includes multiple locking edges.

[0046] The pressure relief valve can be safely and reliably installed onto the carrier component using at least three locking elements. By providing multiple locking edges or corresponding knurling (or grooves) forming the locking edges, the pressure relief valve can still be installed on the carrier component in a sealing manner, and in particular, it can be installed on the carrier component with a predetermined retaining force, despite possible manufacturing tolerances.

[0047] The cover device can be connected to the outer wall of the housing device via a locking device and a locking recess, the locking device and the locking recess being arranged in a radially circumferential (or radially circumferential) manner and configured to correspond to each other.

[0048] By setting the corresponding locking device and locking notch, the cover device can be quickly and easily installed on the housing device to form a pressure relief valve.

[0049] Since the diaphragm device is already secured to the diaphragm retaining device of the cover device, the diaphragm device is attached to the annular sealing wall of the bottom wall of the housing device in a sealed manner and under pre-tension in the same working steps.

[0050] A pressure relief valve can be provided to reduce excessive pressure in the battery housing (especially in electric vehicles), wherein the battery housing is configured to house the battery assembly. The battery assembly is preferably a high-voltage battery, and the pressure relief valve can be provided and secured in a through-hole in a carrier member (especially the battery housing). The carrier member is particularly an aluminum profile.

[0051] The invention will now be described in more detail based on the design examples shown in the accompanying drawings. The invention includes the features shown in the drawings. In the drawings:

[0052] Figure 1 A perspective view of a pressure relief valve according to the invention, illustrating a first design example, is shown.

[0053] Figure 2 A perspective view showing a side-section of the pressure relief valve is provided.

[0054] Figure 3 The image shows a top view of the pressure relief valve.

[0055] Figure 4 The following is a side sectional view of the pressure relief valve along line AA.

[0056] Figure 5 Another side sectional view of the pressure relief valve, showing detailed view B, is shown.

[0057] Figure 6 Another perspective view of a pressure relief valve with a diaphragm device is shown.

[0058] Figure 7 Show Figure 6 A side sectional perspective view of a pressure relief valve with a diaphragm device.

[0059] Figure 8 Another perspective view of a pressure relief valve without a diaphragm device is shown.

[0060] Figure 9 Show Figure 8 A side sectional perspective view of a pressure relief valve without a diaphragm device.

[0061] Figure 10 A perspective view of a pressure relief valve with a diaphragm retaining device and a cover assembly for the diaphragm assembly is shown.

[0062] Figure 11 Show Figure 10 A three-dimensional view of the side section.

[0063] Figure 12A perspective view of a pressure relief valve according to the invention, illustrating a second design example, is shown.

[0064] Figure 13 A perspective view showing a side-section of the pressure relief valve is provided.

[0065] Figure 14 The image shows a top view of the pressure relief valve.

[0066] Figure 15 The diagram shows a side sectional view of the pressure relief valve along line CC.

[0067] Figure 16 Another side cross-sectional view of the pressure relief valve with detailed view D is shown.

[0068] Figure 17 Another perspective view of a pressure relief valve with a diaphragm device is shown.

[0069] Figure 18 Show Figure 17 A side sectional perspective view of a pressure relief valve with a diaphragm device.

[0070] Figure 19 Another perspective view of a pressure relief valve without a diaphragm device is shown.

[0071] Figure 20 Show Figure 19 A side sectional perspective view of a pressure relief valve without a diaphragm device.

[0072] Figure 21 A perspective view of a pressure relief valve with a diaphragm retaining device and a cover assembly for the diaphragm assembly is shown.

[0073] Figure 22 Show Figure 21 A three-dimensional view of the side section.

[0074] The following text is based on the first design example ( Figures 1 to 11 The pressure relief valve 1 according to the present invention is described.

[0075] The pressure relief valve 1 includes a bowl-shaped housing device 2, a cover device 3, and a diaphragm device 4.

[0076] The bowl-shaped housing device 2 includes a bottom wall 5. The bottom wall 5 defines a valve through opening 6. In the region of the valve through opening 6, the surface of the bottom wall facing the diaphragm device 4 forms an annular sealing wall 7.

[0077] A radially circumferential (or radially periphery) outer wall (radial umlaufendeMantelwandung)8 is integrally formed on the bottom wall 5.

[0078] Multiple excess pressure or through-holes 9 are constructed in the outer wall 8 in a radially circumferential (or radially circumferential) manner and are equidistant from each other to release excess pressure to be released through the valve through-holes 6.

[0079] On the outer surface of the outer wall 8, for example, six radially circumferential (or radially circumferential) locking elements 10 are provided, which extend outward in the radial direction and are preferably equidistant from each other, for fixing the pressure relief valve 1 in the through opening of the carrier member (not shown).

[0080] Each locking element in the locking element 10 preferably includes a plurality of locking edges 11, which are configured to be knurled (or grooved) 12. Preferably, the locking element 10 is disposed in the outer wall 8 of the housing device 2 adjacent to the excessive pressure opening 9.

[0081] Therefore, the locking element 10 is preferably configured to engage from the rear with the edge of the through opening of the carrier member (not shown). Alternatively, the locking element 10 may also be structurally configured to engage in a corresponding (not shown) locking element receiving recess of the carrier member.

[0082] A locking recess 13, also configured as a through opening, is provided in the outer wall 8. The locking recesses are arranged radially around (or radially circumferentially) and equidistantly spaced from each other in the sleeve wall 8. The locking recess 13 is used to receive a corresponding locking device 14 of the cover device 3 so as to connect the cover device to the housing device 2.

[0083] The cover device 3 is generally disc-shaped, wherein at least two or three or more locking devices 14 are integrally formed on the radially outer edge of the cover device in a radially circumferential (or radially peripheral) manner and are equidistant from each other for connection to the housing device 2. The locking devices are configured to correspond to the locking recesses 13 of the housing device 2.

[0084] In addition, the cover device 3 is provided with an excessive pressure or perforation opening 9 for releasing or reducing excessive pressure.

[0085] Approximately at the center, the cover device 3 includes a diaphragm retaining device 15 extending toward the bottom wall 5 of the housing device 2. The diaphragm retaining device 15 is connected to the cover device 3 via a web 16 defining the excess pressure opening 9 of the cover device 3, and the diaphragm retaining device 15 is an integral part of the cover device.

[0086] The diaphragm retaining device 15 is configured in the shape of a pin, particularly in the shape of a tapered pin that gradually narrows toward the bottom wall 5 of the housing device 2. At its end facing the bottom wall 2, the diaphragm retaining device according to the first design example includes a cylindrical connecting or fastening portion 17.

[0087] In the region of the fastening portion 17, the diaphragm holding device 15 includes, in particular, a radially circumferential (or radially circumferential) annular pretension portion 24 that extends substantially parallel to the diaphragm device 4.

[0088] The pretensioning portion 24 is configured such that the larger the diameter of the pretensioning portion, the greater the pretension force, wherein the diaphragm device 4 is disposed on the sealing wall 7 of the valve through opening 6 with this pretension force. This means that the wider or larger the outer diameter of the annular pretensioning portion 21, the shorter the free leg of the diaphragm device 4.

[0089] As explained above, a similar technical effect can be achieved by changing the height of the diaphragm holding device, which is orthogonal to the diaphragm device.

[0090] A cylindrical fastening portion 17 may be provided in a corresponding connection or fastening recess 18 of the diaphragm device, and preferably, the fastening portion 17 is releasably connected to the diaphragm device via a press fit. The fastening recess 18 may be configured as a blind hole. This connection area is referred to as the connection area.

[0091] As an addition to or alternative to the press fit, a radially circumferential (or radially periphery) locking edge may also be provided to engage with a locking recess of the corresponding construction or any suitable form and / or force and / or friction locking connection. Alternatively, a simple loose contact may be provided between the fastening portion 17 and the fastening recess 18.

[0092] The diaphragm device 15 is generally bell-shaped, semi-shell-shaped, or spherical, and includes a radially circumferential (or radially periphery-shaped) sealing edge 19 at its end facing the bottom wall 5 for sealingly resting on the sealing wall 7 of the bottom wall 5 of the housing device 2.

[0093] The fastening notch 18 is provided at approximately the center of the diaphragm device 15 for preferably releasably connecting to the fastening portion 17 of the diaphragm holding device 15.

[0094] Using a two-component injection molding process, it is also possible to integrally connect the diaphragm device 4 and the diaphragm holding device 15 of the cover device 3.

[0095] In the region of the bottom wall, the housing assembly 2 also includes an integrally formed, preferably stepped, fastening flange 20 for abutting (not shown) through openings of a carrier member.

[0096] The corresponding steps are used as stops or compression boundaries in sealing devices.

[0097] A corresponding annular sealing device, in the form of a TPE seal or an O-ring seal (not shown), can be provided between the fastening flange 20 and the through opening of the carrier component. This sealing device can also be connected to the fastening flange using a two-component injection molding process.

[0098] The following section is based on the second design example ( Figures 12 to 22 The pressure relief valve 1 according to the present invention will be described in detail below.

[0099] Unless otherwise stated, the pressure relief valve 1 according to the second design example has the same technical features as the pressure relief valve 1 according to the first design example. The same technical features are provided with the same reference numerals.

[0100] According to the second design example, the bottom wall 5 may include a centering ring 21 in the region of the valve through opening 6. The centering ring 21 includes a diaphragm receiving portion 22, which is connected to the bottom wall 5 via a support rod 23.

[0101] Therefore, the centering ring 21 is an integral part of the bottom wall.

[0102] The diaphragm receiving portion 22 is annular with a through opening 24 for receiving and / or connecting the pin 25 of the diaphragm device 4.

[0103] The support rod 23, together with the bottom wall 5 and the diaphragm receiving part 24, defines the corresponding excessive pressure opening 9 in the area of ​​the valve through opening 6.

[0104] The support rods 23 are arranged in a radially circumferential manner and are equidistant from each other. Preferably, for example, at least three can be provided, and preferably four can also be provided, or even five or more support rods 23 can be provided.

[0105] Alternatively, the diaphragm receiving portion 22 can also be configured as a blind hole (not shown).

[0106] Pin 25 is an integral part of diaphragm device 4 and extends from diaphragm device toward fastening flange 20 in the region of valve through opening 6. Pin 25 includes, in particular, a cylindrical fastening portion 26 by means of which pin 25 is disposed and fixed in through opening 27 of diaphragm receiving portion 22.

[0107] In the region of the fastening flange 20, a radially circumferential (or radially circumferential) fastening web 30 is integrally formed on the pin 25 behind the fastening region 26 to connect the pin of the diaphragm device to the diaphragm receiving portion.

[0108] A portion of the pin can extend beyond the fastening web. Therefore, the diaphragm can be installed through the hole by pulling rather than pushing (e.g., by clamping the protruding area with pliers) (pulling is better than pushing because the diaphragm is relatively soft). Thus, this pin can be used as an installation aid.

[0109] The through opening 27 widens in the direction toward the diaphragm device 4 to form a generally circular diaphragm recess 28. In the region of the diaphragm recess, the diaphragm device 4 includes a correspondingly constructed diaphragm portion 29.

[0110] The carrier components, especially the aluminum profiles used for the battery casings of high-voltage batteries (e.g., those used in modern electric vehicles), are thus designed to reduce any excess pressure generated within these battery casings.

[0111] This excessive pressure may be caused, for example, by gas forming in the event of a battery malfunction or by a fire. The excessive pressure that subsequently appears in the battery housing can be released by means of a pressure relief valve according to the invention, wherein when a predetermined threshold is exceeded, the diaphragm device (especially its sealing edge) elastically deforms and is lifted away from the sealing wall of the bottom wall of the housing device.

[0112] Then, the escaping gas or excessive pressure is first released into the space defined by the bottom wall, outer wall and cover of the housing, and then released to the outside through the through openings provided in the cover and outer wall.

[0113] List of reference numerals

[0114] 1. Pressure relief valve

[0115] 2. Housing assembly

[0116] 3. Cover device

[0117] 4. Diaphragm device

[0118] 5 bottom wall

[0119] 6. Valve through opening

[0120] 7. Sealed wall

[0121] 8 outer wall

[0122] 9. Excessive pressure opening

[0123] 10 Locking elements

[0124] 11 Locking edge

[0125] 12. Knurling (or grooves)

[0126] 13 Locking notch

[0127] 14 Locking device

[0128] 15 Diaphragm Holding Device

[0129] 16 sheets

[0130] 17 Fastening parts

[0131] 18 Fastening components

[0132] 19 Sealing edge

[0133] 20 Fastening flange

[0134] 21. Centering ring

[0135] 22 Diaphragm receiving section

[0136] 23 support rods

[0137] 24 Pre-tensioning section

[0138] 25 sales

[0139] 26 Fastening parts

[0140] 27. Through opening

[0141] 28 Diaphragm notch

[0142] 29. Membrane section

[0143] 30 Fastening web

Claims

1. A pressure relief valve (1), the pressure relief valve comprising: A bowl-shaped housing device (2), the housing device having: Bottom wall (5), the bottom wall including an annular sealing wall (7), wherein the sealing wall (7) defines the valve through opening (6), and outer wall(8); Cover device (3), the cover device is used to cover the housing opening of the housing device (2) opposite to the bottom wall (5), and the cover device has a diaphragm holding device (15) extending in the direction of the bottom wall (5). Diaphragm device (4), the diaphragm device being used to cover the valve through opening (6). The diaphragm device (4) is connected to the diaphragm retaining device (15) and is sealingly disposed on the annular sealing wall (7) such that the valve through opening (6) is closed. The diaphragm retaining device (15) gradually narrows in the direction of the bottom wall and is an extension of the cover device. At least three locking elements for fixing to the carrier member are arranged radially around the outer wall and are equidistant from each other, wherein each locking element includes a plurality of locking edges positioned above the bottom wall.

2. The pressure relief valve (1) according to claim 1. Its features are, The diaphragm retaining device (15) is configured and sized such that a force is applied to the radially surrounding sealing edge (19) of the diaphragm device (4) via the diaphragm retaining device (15) in the direction of the sealing wall (7), such that the sealing edge (19) is sealed against the sealing wall (7) under pre-tension.

3. The pressure relief valve (1) according to claim 1. Its features are, The diaphragm device (4) includes a fastening recess in which the fastening portion (17) of the diaphragm holding device (15) is received in contact, or the fastening portion (17) of the diaphragm holding device (15) can be press-fitted.

4. The pressure relief valve (1) according to claim 1. Its features are, The housing device (2) and / or the cover device (3) include a through-hole (27) for releasing excessive pressure escaping from the valve through-hole (6).

5. The pressure relief valve (1) according to claim 1, Its features are, Only one valve through opening (6) is constructed in the bottom wall (5).

6. The pressure relief valve (1) according to claim 1. Its features are, In the region of the valve through opening (6), the bottom wall (5) includes a centering ring (21), which includes a diaphragm receiving portion (22) for receiving a pin (25) of the diaphragm device (4) in the region of the diaphragm device (4).

7. The pressure relief valve (1) according to claim 1. Its features are, An annular mounting flange is disposed in the region of the bottom wall (5), wherein a sealing device can be disposed between the carrier member and the mounting flange.

8. The pressure relief valve (1) according to claim 7. Its features are, The sealing device is a TPE seal or an O-ring seal.

9. The pressure relief valve (1) according to claim 1. Its features are, The cover device (3) can be connected to the outer wall (8) of the housing device (2) via a locking device (14) and a locking recess (13), the locking device (14) and the locking recess (13) being arranged radially around each other and configured to correspond to each other.

10. The pressure relief valve (1) according to claim 1. Its features are, The pressure relief valve (1) is configured to relieve excessive pressure in the battery housing for accommodating the battery device, wherein the pressure relief valve (1) is configured and secured in a through opening (27) in the battery housing, wherein the battery housing comprises aluminum.

11. The pressure relief valve (1) according to claim 10, wherein, The battery device is a high-voltage battery.

12. A pressure relief valve, the pressure relief valve comprising: A bowl-shaped shell, the shell having: The bottom wall includes an annular sealing wall, wherein the sealing wall defines a valve through-opening, and outer wall; A cover for covering a housing opening opposite the bottom wall of the housing, and the cover having a diaphragm retainer extending in the direction of the bottom wall; A diaphragm for covering the valve through opening, wherein the diaphragm is connected to the diaphragm retainer and is hermetically disposed on the annular sealing wall such that the valve through opening is closed; The outer wall includes multiple openings for pressure relief and the cover includes multiple through openings for pressure relief, and multiple locking elements extend outward from the outer wall at a position above the bottom wall for securing the pressure relief valve to the load-bearing member.

13. The pressure relief valve according to claim 12, wherein, The outer wall includes a plurality of locking through openings and the cover includes a plurality of locking protrusions that engage in the locking through openings to retain the cover on the bowl-shaped housing.

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