Temperature sensor and hydrogen tank valve

Abstract

The invention relates to a temperature sensor (1) comprising - a sensor element (3) having connecting wires (2), preferably an NTC element, - Conductive tracks (4) for contacting the connecting wires (2) of the sensor element (3), - a plastic part (5) for receiving the sensor element (3) and the conductor tracks (4) and - a sensor sleeve (6) for receiving at least the plastic part (5) including the sensor element (3) received therein, wherein a coupling element (18) is arranged between the plastic part (5) and the sensor sleeve (6), which is pre-tensioned radially and / or axially against the sensor sleeve (6). The invention further relates to a hydrogen tank valve with a temperature sensor according to the invention (1).

Description

[0001] The invention relates to a temperature sensor, in particular a temperature sensor for a hydrogen tank valve, with which the temperature in a hydrogen tank can be measured. Furthermore, the invention relates to a hydrogen tank valve with a temperature sensor according to the invention. State of the art

[0002] Hydrogen tank valves are known for both withdrawing hydrogen from and filling a hydrogen tank. Such a hydrogen tank valve incorporates at least one controllable shut-off valve. In addition, further valves and / or sensors, particularly a temperature sensor for monitoring the temperature inside the hydrogen tank, are typically integrated.

[0003] A temperature sensor for a hydrogen tank valve comprises a sensor element, for example, an NTC element, which is placed in the hydrogen tank via the hydrogen tank valve. A sensor sleeve protects the sensor element from contact with the hydrogen stored in the tank. The electrical connections of the sensor element, for example, in the form of connecting wires, must be routed to the outside via a bore in the hydrogen tank valve or contacted externally. This contact can be achieved, for example, by means of conductive traces that are electrically connected to the sensor element's connecting wires, in particular by welding.

[0004] The sensor sleeve of a temperature sensor for a hydrogen tank valve typically features a stepped axial bore to accommodate the sensor element and the plastic part. This means that the axial bore has a reduced inner diameter in the end section where the sensor element is located.

[0005] The stepped design minimizes the play between the sensor sleeve and the sensor element, ensuring virtually lossless heat transfer from the sleeve to the sensor element. This increases the temperature sensor's measurement accuracy. However, the stepped design of the axial bore increases the manufacturing complexity of the sensor sleeve and complicates the temperature sensor's installation, as the sensor element must be precisely positioned within the sleeve.

[0006] The present invention is concerned with the objective of providing a temperature sensor for a [device] which has a high measurement accuracy and is at the same time easy and inexpensive to manufacture.

[0007] To solve the problem, a temperature sensor with the features of claim 1 is proposed. Advantageous embodiments of the invention are described in the dependent claims. Furthermore, a hydrogen tank valve with a temperature sensor according to the invention is specified. Disclosure of the invention

[0008] The proposed temperature sensor includes: - a sensor element having connecting wires, preferably an NTC element, - Conductive traces for contacting the connecting wires of the sensor element, - a plastic part to hold the sensor element and the conductor tracks and - a sensor sleeve for at least partially accommodating the plastic part including the sensor element contained therein.

[0009] Between the plastic part and the sensor sleeve, a coupling element is arranged in the area of ​​the sensor element, which is pre-tensioned radially and / or axially against the sensor sleeve.

[0010] The coupling element facilitates the positioning of the sensor element, which is housed in the plastic part, within the sensor sleeve, thus simplifying the installation of the temperature sensor. For example, a radially pre-tensioned coupling element can be used to center the sensor element within the sensor sleeve. Simultaneously, the radial and / or axial pre-tension of the coupling element against the sensor sleeve ensures contact between the coupling element and the sensor sleeve, enabling the coupling element to be used for indirect heat transfer from the sensor sleeve to the sensor element. The direct contact between the coupling element and the sensor sleeve results in high heat transfer and therefore high measurement accuracy of the temperature sensor.

[0011] The coupling element positioned between the sensor sleeve and the sensor element bridges the gap between the sensor element and the sensor sleeve, allowing the sensor sleeve to be manufactured with more clearance. Furthermore, a stepped design of the sensor sleeve can be omitted, making it simpler and more cost-effective to manufacture.

[0012] According to a preferred embodiment of the invention, the plastic part, including the sensor element and the coupling element, is received in an axial bore of the sensor sleeve, which, preferably with the exception of an end region designed as an insertion cone, has a constant inner diameter. An axial bore with a constant inner diameter is significantly easier to manufacture than a stepped bore. In particular, only one drill bit is required, so no tool change is necessary. Furthermore, a larger drill bit can be used, which is more robust and thus has a longer service life. If an insertion cone is provided, it can also be manufactured easily and cost-effectively due to its location in an easily accessible end region.

[0013] Furthermore, it is proposed that the sensor element be inserted into a tapered end section of the plastic part and that the coupling element surround this tapered end section. This ensures that there is sufficient space within the axial bore of the sensor sleeve to accommodate the coupling element. The coupling element is preferably designed, at least partially, as a sleeve so that it can be easily mounted by placing it onto the tapered end section.

[0014] To fix the coupling element in position, it is proposed that the coupling element be bonded to the plastic part and the sensor element housed within it via an adhesive bond. Advantageously, the area between the coupling element and the sensor element is completely filled with adhesive to form the bond, so that the adhesive displaces the air originally present there. Since the thermal conductivity of the adhesive is generally higher than that of air, this method improves heat transfer from the coupling element to the sensor element.

[0015] An adhesive bond between the coupling element and the sensor sleeve to improve heat transfer is not required, as the coupling element is radially and / or axially preloaded against the sensor sleeve. Furthermore, the direct contact between the coupling element and the sensor sleeve, resulting from this radial and / or axial preload, enables better heat transfer from the sensor sleeve to the coupling element than indirect contact via an adhesive bond.

[0016] According to a first preferred embodiment of the invention, the coupling element is multi-part and comprises, in addition to a sleeve, a spring for radial and / or axial preload against the sensor sleeve. The sleeve can be open or closed at the end, with the closed-end design increasing the heat transfer surface area. Furthermore, a spring arranged coaxially to the sleeve can be better supported by a sleeve with a closed end. In all cases, the spring is arranged outside the sleeve to achieve the desired radial and / or axial preload against the sensor sleeve. The spring can, for example, be a simple helical compression spring.

[0017] According to a further preferred embodiment of the invention, the coupling element has at least three spring arms by which the coupling element is radially biased against the sensor sleeve. In this case, the coupling element can be manufactured as a single piece, thus requiring fewer assembly steps. The minimum number of three spring arms ensures the centering function of the coupling element. Furthermore, the at least three spring arms create at least three contact areas between the coupling element and the sensor sleeve.

[0018] As the number of spring arms or contact areas increases, the heat transfer from the sensor sleeve to the coupling element improves.

[0019] To further optimize heat transfer, it is proposed that the coupling element be made from a metal sheet, for example, a copper or aluminum sheet. This is because metals in general, and copper and aluminum in particular, exhibit high thermal conductivity.

[0020] Furthermore, it is proposed that the coupling element be a stamped / bent part. This allows for particularly simple and cost-effective manufacturing. For example, it can be stamped from a sheet of metal and then bent into a sleeve. If the coupling element has spring arms, these can be released during stamping and subsequently bent to an outer diameter that creates a radial preload on the coupling element within the sensor sleeve.

[0021] Furthermore, it is proposed that the plastic part - Longitudinal grooves for guiding and electrically insulating the connecting wires of the sensor element, - Longitudinal grooves for guiding and electrically insulating the conductor tracks as well as - has at least one window-like opening penetrating the plastic part to expose the connecting wires and conductor tracks received in the longitudinal grooves, wherein the longitudinal grooves for the connecting wires and the conductor tracks overlap each other in the area of ​​the at least one window-like opening.

[0022] The plastic part of the temperature sensor not only provides electrical insulation but also guides the connecting wires and conductor tracks. This guidance facilitates the installation of the temperature sensor, particularly the insertion of the sensor element into the plastic part and the insertion of the assembly into the sensor housing. Both the electrical insulation and the guidance are achieved via longitudinal grooves formed in the plastic part. The plastic part features two longitudinal grooves: one for the connecting wires and another for the conductor tracks.

[0023] Since the first and second longitudinal grooves overlap, the connecting wires and conductor tracks can also be arranged overlappingly. The connecting wires can be welded to the conductor tracks via the at least one window-like opening provided in the plastic part in this area. Preferably, two window-like openings are provided in the plastic part, so that each opening exposes one connecting wire and one conductor track. Thus, a separate welding window is provided for each weld. This prevents a short circuit caused by the welding material introduced into the opening.

[0024] Guiding the sensor element's connecting wires through the longitudinal grooves ensures correct and reproducible positioning. Since the plastic part simultaneously supports the connecting wires held in the longitudinal grooves, the risk of bending, compression, and / or kinking, and thus the risk of short circuits and / or ground faults, is minimized.

[0025] Furthermore, it is proposed that in an overlap area of ​​the longitudinal grooves for the connecting wires and the conductor tracks, the longitudinal grooves for guiding and electrically insulating the connecting wires are designed as bottom-side recesses in the longitudinal grooves for guiding and electrically insulating the conductor tracks. This allows the connecting wires and conductor tracks to lie on top of each other in the overlap area. Ideally, the sensor element is first inserted into the plastic part so that the free ends of the connecting wires lie in the bottom-side recesses of the longitudinal grooves for the conductor tracks. Subsequently, the conductor tracks can be inserted into the longitudinal grooves provided for this purpose, so that the conductor tracks lie on the connecting wires. Welding can then be carried out through the at least one window-like opening that exposes the connecting wires and the conductor tracks behind them.

[0026] According to a preferred embodiment of the invention, the longitudinal grooves for guiding and electrically insulating the conductor tracks have clamping lugs that are arranged offset from one another on opposite sides. The conductor tracks are held clamped in the longitudinal grooves by means of these clamping lugs.

[0027] Alternatively or additionally, it is proposed that the plastic part has several pins arranged along the longitudinal grooves, oriented perpendicular to them and deformable under the influence of temperature. Under the influence of temperature, the pins can then be deformed so that they rest on the conductor tracks and secure them against falling out of the longitudinal grooves. Appropriate recesses in the conductor tracks – if provided – can also create a positive fit between the deformed pins and the conductor tracks, preventing longitudinal displacement of the conductor tracks relative to the plastic part. The deformation of the pins can be achieved, for example, by hot or warm riveting. To fix two conductor tracks with the aid of one pin, the pins are preferably arranged along the longitudinal grooves on a central rib separating the longitudinal grooves.

[0028] The sensor element's connecting wires can be fixed in the longitudinal grooves using temperature-deformable pins, similar to the conductor tracks. Alternatively or additionally, the connecting wires can be glued to the plastic part.

[0029] In an advantageous embodiment, the plastic part has a circular cross-section, at least in sections, and is provided with at least one flattened area on its outer circumference, serving as a bearing surface and / or gripping surface. The circular cross-section facilitates insertion of the plastic part into the sensor sleeve, as the angular position of the plastic part relative to the sensor sleeve is irrelevant. The at least one flattened area on the outer circumference, serving as a bearing surface and / or gripping surface, enables a high degree of automation in the manufacturing of the temperature sensor, thus saving time and costs.

[0030] Since the temperature sensor according to the invention is preferably used in a hydrogen tank valve, a hydrogen tank valve with a temperature sensor according to the invention is further proposed. The temperature sensor is preferably partially housed in a bore of a valve block of the hydrogen tank valve. The connection of the temperature sensor to an external power source can be realized via the bore. The sensor element, enclosed by the sensor sleeve, projects into the water tank to detect the temperature of the hydrogen stored therein.

[0031] The invention and its advantages are explained in more detail below with reference to the accompanying drawings. These show: Fig. 1 a longitudinal section through a first temperature sensor according to the invention, Fig. 2 a longitudinal section through a second temperature sensor according to the invention, Fig. 3 a longitudinal section through the temperature sensor of the Fig. 2 during assembly, Fig. 4 a) a top view and b) a side view of the coupling element of the temperature sensor, designed as a stamped / bent part Fig. 2, each before bending into a sleeve, Fig. 5 a longitudinal section through a third temperature sensor according to the invention, Fig. 6 a longitudinal section through the temperature sensor of the Fig. 5 during assembly, Fig. 7 a) a top view, b) a first side view and c) a second side view of the coupling element of the temperature sensor, designed as a stamped / bent part Fig. 5, each before bending into a sleeve, Fig. 8 a) to d) each show a top view of a fourth temperature sensor according to the invention during assembly, wherein a) shows the plastic part, b) the plastic part with inserted sensor element, c) the plastic part with inserted sensor element and inserted conductor tracks and d) the plastic part with inserted sensor element, inserted conductor tracks and slid-on coupling element, Fig. 9 a) to c) each a side view of a plastic part for a temperature sensor according to the invention, Fig. 10 a cross-section through the plastic part of the Fig. 9, Fig. 11 a longitudinal section through a sensor sleeve for a temperature sensor according to the invention. Detailed description of the drawings

[0032] The Fig. Figure 1 shows a first temperature sensor 1 according to the invention for use in a hydrogen tank valve. It comprises a sensor sleeve 6, which protects a sensor element 3 from direct contact with hydrogen. The sensor element 3, which in this case is an NTC element, has connecting wires 2 and is inserted into a plastic part 5. The plastic part 5 has first longitudinal grooves 7 for guiding and electrically insulating the connecting wires 2 of the sensor element 3. In addition, the plastic part 5 has second longitudinal grooves 8 in which conductor tracks 4 for contacting the connecting wires 2 are received.

[0033] As exemplified in the Fig. 8a) to 8d) shown, is inserted into the provided plastic part 5 (see Fig. 8a)) first insert the sensor element 3 (see Fig. 8b)). After inserting the sensor element 3, the conductor tracks 4 are inserted. Since the longitudinal grooves 8 provided for this purpose have an overlap area 16 with the longitudinal grooves 7 (see Fig. 8a)), in which the connecting wires 2 of the sensor element 3 are received, the conductor tracks 4 lie on the connecting wires 2 (see Fig. 8c)). To fix the contact, the connecting wires 2 are welded to the conductor tracks 4. The welding is carried out from the outside via window-like openings 9 in the plastic part 5, which are arranged for this purpose in the overlap area 16 (see Fig. 8a)). A multi-part coupling element 18 is then placed on a tapered end section 20 of the plastic part 5, into which the sensor element 3 is inserted, so that a sleeve of the multi-part coupling element 18 surrounds the end section 20 (see Fig. 8d)). The pre-assembled module then only needs to be inserted into the sensor sleeve 6 together with a spring 22.

[0034] In the multi-part version, the coupling element 18 comprises a sleeve and a spring 22. The sleeve can be closed at the end (see Fig. 1) or be designed with an open end (see Figure (d)). The open-end design allows for the subsequent application of an adhesive to create an adhesive bond 19 between the sleeve and the plastic part 5, as well as the sensor element 3. If the sleeve is designed with a closed end, the adhesive must be applied before the sleeve is mounted. However, the closed-end design of the sleeve has the advantage of providing a larger heat transfer surface. The heat transfer occurs from the sensor sleeve 6 via the multi-part coupling element 18 and the adhesive layer 19 to the sensor element 3. The spring 22 of the multi-part coupling element 18, which is axially pre-tensioned against the sensor sleeve 6, ensures direct contact between the coupling element 18 and the sensor sleeve 6 (see Figure 1). Fig. 1).

[0035] The sensor sleeve 6 has an axial bore 15 for receiving the pre-assembled module, which—except for an insertion cone 21 arranged at the end—has a constant inner diameter. The insertion cone 21 facilitates the insertion of the pre-assembled module consisting of plastic part 5, sensor element 3, conductor tracks 4, and coupling element 18, as shown in the example in the Fig. 8d) shown.

[0036] The Fig. 2 A second temperature sensor 1 according to the invention can be removed. This differs from the one of the Fig. 1 by the fact that the coupling element 18 is designed as a single piece. In the Fig. 2 The coupling element 18 has a sleeve-shaped section and spring arms 23, which replace the spring 22. There are at least three spring arms 23 to ensure centering of the pre-assembled unit within the sensor sleeve 6. The spring arms 23 are radially biased against the sensor sleeve 6. This ensures direct contact between the coupling element 18 and the sensor sleeve 6, enabling heat transfer from the sensor sleeve 6 to the coupling element 18. Heat transfer from the coupling element 18 to the sensor element 3 occurs via the adhesive bond 19.

[0037] As exemplified in the Fig. As shown in Figure 3, the spring arms 23 of the coupling element 18 are radially pre-tensioned when the pre-assembled unit, consisting of plastic part 5, sensor element 3, conductor tracks 4 and coupling element 18, is inserted into the sensor sleeve 6, with the insertion cone 21 providing automatic centering and thus facilitating insertion. Furthermore, the axial bore 15 has a constant inner diameter, so that the sensor sleeve 6 can be manufactured simply and cost-effectively.

[0038] The coupling element 18 of the temperature sensor 1 of the Fig. 2 can in particular be a stamped / bent part made from a sheet of metal (see Fig. 4a) and Fig. 4b)). The Fig. Figure 4a) shows a top view of the stamped / bent part after stamping and before bending. The stamped / bent part has six spring arms 23 and an adjoining section that is later formed into a sleeve by bending. Connecting elements 24 arranged on both sides enable a dovetail joint after bending, so that the sleeve retains its shape. The bending can be carried out in several steps. For example, the spring arms 23 can first be bent convexly radially outwards (see Figure 4a). Fig. 4b)). The sheet metal part can then be formed into a sleeve.

[0039] The Fig. Figure 5 shows a third temperature sensor 1 according to the invention. This sensor also has a one-piece coupling element 18 with spring arms 23 that are radially biased against the sensor sleeve 6. The coupling element 18 is also a stamped / bent part made from a sheet metal part (see Figure 5). Fig. 7a) to 7c)). The Fig. Figure 7a) shows a top view of the stamped / bent part after stamping and before bending. In this case, the stamped / bent part has three spring arms 23 that connect to a section that is later formed into a sleeve by bending. Connecting elements 24 arranged on both sides of this section hold the sleeve closed. In a first bending step, the spring arms 23 are bent convexly radially inwards (see Figure 7a). Fig. 7b)). In a second bending step, the convexly radially inwardly bent spring arms 23 are folded outwards (see Fig. 7c)), so that they are arranged radially outside around the sleeve in relation to the sleeve yet to be manufactured (see Fig. 5 and Fig. 6) When the pre-assembled module, consisting of plastic part 5, sensor element 3, conductor tracks 4 and coupling element 18, is inserted, the spring arms 23 are compressed and radially pre-tensioned, bearing against the outer sleeve-shaped section of the coupling element 18. The coupling element 18 is thus somewhat more robust than that of the one in the Fig. 2 temperature sensor shown 1.

[0040] The Fig. Figures 9a) to 9c) show a preferred embodiment of a plastic part 5 for a temperature sensor 1 according to the invention. The side view of the Fig. Figure 9a) shows the longitudinal grooves 7 for receiving the connecting wires 2 of the sensor element 3 and the longitudinal grooves 8 for receiving the conductor tracks 4. These overlap each other, forming the overlap area 16 in which the window-like openings 9, serving as welding windows, are arranged. Both the longitudinal grooves 7 and the longitudinal grooves 8 are separated from each other by a central web 10, so that the connecting wires 2 and the conductor tracks 4 are electrically insulated from each other. The longitudinal grooves 7 are designed as bottom-side recesses in the area of ​​the longitudinal grooves 8, so that the connecting wires 2 and the conductor tracks 4 lie on top of each other in the overlap area 16 (see also Fig. 10) To fix the conductor tracks 4 in the longitudinal grooves 8, the plastic part 5 forms clamping lugs 12 projecting into the longitudinal grooves 8, which are arranged axially offset from each other on opposite sides (see Fig. 9a)). Additional fixing is achieved by means of several pins 13 arranged along the central web 10 (see Fig. 9a) and Fig. 9b) as well as Fig. 10), which are deformed under the influence of temperature. The pin material is pressed into the longitudinal grooves 8, thus preventing the conductor tracks 4 from falling out. The underlying connecting wires 2 are held by the conductor tracks 4. To achieve a positive fit between the pin material and the conductor tracks 4, the conductor tracks 4 can have recesses (not shown) in the area of ​​the pins 13, into which the pin material is then pressed.

[0041] The insertion and fixing of the connecting wires 2 and the conductor tracks 4 in the longitudinal grooves 7, 8 can be carried out fully automatically. For this purpose, the plastic part 5 has flattened areas 14 on its outer circumference (see figure). Fig. 9b) and Fig. 9c)), which serve as a contact surface and / or as a gripping surface.

[0042] To facilitate the insertion of the connecting wires 2 and the conductor tracks 4 into the respective longitudinal grooves 7, 8 of the plastic part 5, the longitudinal grooves 7, 8 can have chamfered longitudinal edges 11 (see Fig. 10).

[0043] The Fig. A sensor sleeve 6 for a temperature sensor 1 according to the invention can be removed from section 11. The sensor sleeve 6 has an axial bore 15, which is continuously variable and therefore particularly easy to manufacture. At its end, the sensor sleeve 6 has an insertion cone 21, which facilitates the insertion of the pre-assembled module, consisting of a plastic part 5, sensor element 3, conductor tracks 4, and coupling element 18. If the coupling element 18 is multi-part and comprises a sleeve and a spring 22, the spring 22 is inserted into the axial bore 15 of the sensor sleeve 6 before the pre-assembled module. The axial preload of the spring 22 is applied when the pre-assembled module is inserted.

Claims

[1] Temperature sensor (1) comprising - a sensor element (3) having connecting wires (2), preferably an NTC element, - Conductive tracks (4) for contacting the connecting wires (2) of the sensor element (3), - a plastic part (5) for receiving the sensor element (3) and the conductor tracks (4) and - a sensor sleeve (6) for receiving at least the plastic part (5) including the sensor element (3) received therein, wherein a coupling element (18) is arranged between the plastic part (5) and the sensor sleeve (6) in the area of ​​the sensor element (3), which is pre-tensioned radially and / or axially against the sensor sleeve (6). [2] Temperature sensor (1) according to claim 1, characterized by, that the plastic part (5) including the sensor element (3) and the coupling element (18) is received in an axial bore (15) of the sensor sleeve (6) which, preferably with the exception of an end area designed as an insertion cone (21), has a constant inner diameter. [3] Temperature sensor (1) according to claim 1 or 2, characterized by , that the sensor element (3) is inserted into a tapered end section (20) of the plastic part (5) and the coupling element (18), which is preferably designed in a sleeve-like form at least in sections, surrounds the tapered end section (20). [4] Temperature sensor (1) according to any one of the preceding claims, characterized by , that the coupling element (18) is connected to the plastic part (5) and the sensor element (3) contained therein via an adhesive connection (19). [5] Temperature sensor (1) according to any one of the preceding claims, characterized by, that the coupling element (18) is designed in multiple parts and includes a sleeve and a spring (22) for radial and / or axial preload against the sensor sleeve (3). [6] Temperature sensor (1) according to any one of the preceding claims, characterized by , that the coupling element (18) has at least three spring arms (23) via which the coupling element (18) is radially biased against the sensor sleeve (6). [7] Temperature sensor (1) according to any one of the preceding claims, characterized by , that the coupling element (18) is made from a metal sheet, for example from a copper or aluminium sheet, wherein preferably the coupling element (18) is a stamped / bent part. [8] Temperature sensor (1) according to any one of the preceding claims, characterized by , that the plastic part (5) - Longitudinal grooves (7) for guiding and electrically insulating the connecting wires (2) of the sensor element (3), - Longitudinal grooves (8) for guiding and electrically insulating the conductor tracks (4) as well as - has at least one window-like opening (9) penetrating the plastic part (5) to expose the connecting wires (2) and conductor tracks (4) received in the longitudinal grooves (7, 8), wherein the longitudinal grooves (7, 8) for the connecting wires (2) and the conductor tracks (4) overlap each other in the area of ​​the at least one window-like opening (9). [9] Temperature sensor (1) according to any one of the preceding claims, characterized by , that in an overlap area (16) of the longitudinal grooves (7, 8) the longitudinal grooves (7) for guiding and electrically insulating the connecting wires (2) are formed as bottom-side recesses in the longitudinal grooves (8) for guiding and electrically insulating the conductor tracks (4). [10] Temperature sensor (1) according to any of the preceding claims, characterized by, that the longitudinal grooves (8) for guiding and electrically insulating the conductor tracks (4) have clamping lugs (12) which are arranged offset from each other on opposite sides. [11] Temperature sensor (1) according to any of the preceding claims, characterized by , that the plastic part (5) has several pins (13) oriented perpendicular to the longitudinal grooves (7, 8) and deformable under the influence of temperature, which are arranged along the longitudinal grooves (7, 8). [12] Temperature sensor (1) according to any one of the preceding claims, characterized by that the plastic part (5) has at least a circular cross-section in sections and is provided on its outer circumference with at least one flattening (14) as a bearing surface and / or gripping surface. [13] Hydrogen tank valve with a temperature sensor (1) according to one of the preceding claims, wherein preferably the temperature sensor (1) is received section by section in a bore of a valve block of the hydrogen tank valve.

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