Coupling module for coupling at least one measuring instrument and device, as well as a method for investigating a connection

Abstract

Coupling module (1 to 1 VI ) for coupling at least one measuring instrument (2) to at least one connection (4) to be examined between at least two components (5, 6) for examining this connection (4) for leak tightness, characterized by: - at least one measuring probe (2.1) of the measuring instrument (2) and - a set of coupling elements (1.1 to 1.n), wherein a predetermined number of coupling elements (1 to 1.n) can be connected to each other in a form-fitting and / or force-fitting manner, forming a guide space (12) and a sample collection space (14), and one of the coupling elements (1.1 to 1.n) is configured to couple with the connection (4) to be investigated and / or one of the components (5, 6) in an area of ​​the connection (4) to be investigated, wherein in a coupled state (100) of the specified number of coupling elements (1.1 to 1.n) the measuring probe (2.1) is movable in the guide chamber (12) and the sample extraction chamber (14) and the coupling elements (1.1 to 1.n) are arranged in the coupled state (100) to seal the measuring probe (2.1) to the outside.

Description

[0001] The invention relates to a coupling module for coupling at least one measuring instrument to at least one connection to be examined, in particular a positive-locking connection and / or a force-locking connection, between at least two components and a device for examining a connection between two components for tightness.

[0002] Various technical solutions, particularly overpressure methods, for investigating the tightness of friction-fit connections, such as screw connections, are known from the prior art, especially from DE 10 2015 002 573 A1 and DE 10 2011 016 526 A1. In the overpressure method, the objects to be tested are filled with a test gas under a defined pressure. Simultaneously, detectors are used to attempt to detect the test gas from the outside. Detection indicates a leak in the detection area. For this purpose, automated, robot-guided detectors exist, which are set up together with the test object in a closed chamber.

[0003] DE 10 2013 209 702 A1 discloses a connection device for testing the tightness of a battery housing, comprising an attachment element for tight mounting on a pressure equalization element integrated into the battery housing, and a pressure connection on the attachment element to apply overpressure or underpressure to the interior of the battery housing through the pressure equalization element.

[0004] Manually guided detectors, including a feed hose and a suction and analysis unit, are also known. These detectors are, for example, guided and held by hand along the test object to detect leaks.

[0005] The invention is based on the objective of simplifying and improving the examination of connections between two components for leak tightness.

[0006] The problem is solved according to the invention by a coupling module with the features of claim 1, by a device with the features of claim 9 and by a method with the features of claim 10.

[0007] Advantageous further training is the subject of the sub-claims.

[0008] The coupling module according to the invention for coupling at least one measuring instrument to at least one connection to be examined between at least two components for examining this connection for leak tightness is characterized by at least one measuring probe of the measuring instrument and a set of coupling elements, wherein a predetermined number of the coupling elements can be connected to each other in a form-fitting and / or force-fitting manner, forming a guide space and a sample collection space, and one of the coupling elements is configured to couple with the connection to be examined, and wherein in a coupled state of the predetermined number of coupling elements the measuring probe is movable in the guide space and the sample collection space, and these coupling elements are configured in the coupled state to seal the measuring probe at least partially to the outside.

[0009] In other words, the coupling module according to the invention has a modular structure in order to be able to couple a measuring instrument to various connections to be examined, in particular to be able to couple it in such a way that the measuring instrument inserted into the coupling module is sealed off from the environment.

[0010] The coupling module comprises at least one module body, in particular a tube body, which can be variably assembled or combined from several coupling elements or individual parts, and which can accommodate an instrument designed as a measuring instrument, for example a measuring probe, and which, together with the instrument, can be manually or robotically placed, held and moved along a measuring path onto the connection to be examined, in particular a screw connection, a snap connection, a bayonet connection, a locking connection, a pressure-lock connection, a hydraulic connection, of a test object, which is in particular formed from two interconnected components.

[0011] The invention may also include a coupling module formed from only a single coupling element into which the measuring probe can be inserted to measure a leak or removed after a measurement has been performed.

[0012] The invention makes it possible to at least partially or completely isolate the measuring probe from external environmental factors by means of the coupling elements in order to at least reduce or prevent an impairment of a measurement result of the measuring probe at the connection of a test object under investigation.

[0013] The invention makes it possible to access different areas on at least one component, where different geometric conditions exist, and to perform a measurement by means of the modular design of the coupling module and the measuring instrument.

[0014] In particular, one of the coupling elements, for example an end coupling element of the coupling module, can be coupled to the connection under investigation, specifically placed on and / or inserted into this connection (also called the connection point or measuring point). For example, in the coupled state of the specified number of coupling elements, the measuring probe can be axially movable in the guide chamber and the sampling chamber and, for example, inserted through the guide chamber (also called the insertion chamber) to the sampling chamber. The coupling elements surrounding the measuring probe are configured in the coupled state to seal off the measuring probe, at least partially, and to prevent external influences, such as wind or air currents that could affect the measurement.

[0015] In one possible embodiment, several or all of the coupling elements are designed as identical parts. For example, the coupling elements can be identical and / or different with respect to shape and / or dimensions. For example, all coupling elements can be designed as identical hollow cylindrical parts (also called modularly connected / connectable, in particular screwed or detachably connected, hollow cylinders). Alternatively or additionally, the coupling elements can be identical or different with respect to their dimensions, in particular their length, diameter, or the like, and / or with respect to their shape, in particular round, angular, or the like.

[0016] The majority of coupling elements (also called hollow cylinders or coupling elements) can be connected to each other by means of a screw connection. At least one of the coupling elements can be arranged at an angle to at least one adjacent coupling element, for example, within an angular range of 0° to 90°, e.g., 0°, 45°, 70°, 90°. At least one of the coupling elements can also be tubular in shape.

[0017] For example, the respective coupling element can be designed as a hollow cylinder with or without an expansion space and / or with a straight profile and / or an angled profile.

[0018] At least one of the coupling elements is designed as an attachment element (also called an interface element or base element). The coupling element designed as an attachment element is, in particular, an end element of the coupling module. This attachment element can be directly coupled to the connection under investigation, in particular by positive locking and / or force locking. An attachment element can, for example, have a seal at one end positioned at the connection under investigation.

[0019] At least one of the coupling elements is provided with an expansion chamber that forms the sampling chamber. For example, at least one of the coupling elements has a larger internal cavity than the other coupling elements, this larger internal cavity being designed as an expansion chamber and forming the sampling chamber. The expansion chamber can, for example, have such dimensions and / or be configured that the measuring probe can be moved along an internal contour of the expansion chamber designed as the sampling chamber, either manually or by a motor, in particular robot-assisted. The other coupling elements each have a smaller internal cavity, which is designed, for example, as a through-hole or through-opening and which is adapted, for example, to an external shape and / or contour of the measuring probe.

[0020] Furthermore, the coupling element comprising the expansion chamber or sample receiving chamber may have at least one cover device. The cover device may be designed to protect the connection under test on the test specimen, in particular to protect it from the environment, for example, by sealing it, and in particular to protect the expansion chamber designed as a sample receiving chamber on the connection under test, in particular by sealing it. The cover device may include a recess for the measuring probe, wherein the measuring probe can be moved along the recess manually or robotically along the cover device. A cover device may be designed to move the measuring probe precisely along a predefined path along the recess. The cover device may be designed to keep external influences such as drafts or air turbulence away from the measuring point or to minimize them.

[0021] Additionally, the covering device can be attached to the component with the connection under investigation by means of at least one holding device. The covering device can also have multiple partial covering sections. For example, the contour of the covering device can have straight sections and / or rounded sections and / or angular sections and / or curved sections.

[0022] A further coupling element can be designed as a sealing element or include at least one seal. In particular, an end of the coupling element oriented towards the connection under investigation is provided with a sealing element or has a sealing area. The sealing element, sealing area, or seal can each be configured to flexibly and flushly enclose the connection under investigation on the test specimen, in particular on one of the interconnected components, so that the coupling module and the relevant component are designed to be sealable and, in particular, tightly connected to each other.

[0023] In one possible embodiment, all coupling elements and the measuring probe comprise complementary locking elements. For example, the complementary locking elements are configured to create a detachable connection, such as a screw connection, a bayonet connection, a pressure-lock connection, a hydraulic connection, a snap connection, a detent connection, or the like, between the coupling elements and / or the measuring probe. This allows both the coupling elements to be quickly and easily mounted or dismounted, as well as the measuring probe to one or more coupling elements.

[0024] In a further embodiment, the measuring instrument can additionally comprise a suction unit, in particular a suction hose of a suction pump, and / or a measuring head (also instrument head). For example, the measuring probe can be provided on one side with the suction unit and on the other side with the measuring head, which is configured to measure a leak in the connection under investigation. The measuring head can, for example, have at least one sensor, in particular a fluid sensor, a gas sensor, or the like, for detecting a medium escaping from the connection under investigation, in particular for detecting a fluid, for example, a gaseous and / or liquid fluid.

[0025] The coupling module, in particular an end-side coupling element, for example the mounting element, can furthermore be configured to be axially and / or radially aligned and fixed in place above the joint under investigation on one of the components and / or to seal the joint under investigation to the outside. In particular, the coupling module can be uniformly aligned by means of the complementary locking elements and held fixedly or statically on the joint under investigation for an extended period of time.

[0026] The device according to the invention for testing the tightness of at least one connection between at least two components comprises the coupling module described above. In a coupled state, the measuring probe can be inserted through the guide chamber to the sample collection chamber, and the coupling elements are configured to seal the measuring probe to the outside. The coupling module with the inserted measuring probe can be placed on the connection to be tested on the components and sealed to one of the components.The coupling module can be set up to be moved manually or by means of a robot from a first connection to be examined on the components to another connection to be examined, and placed on this further connection to be examined in an analogous manner and sealed against the environment by connecting it to one of the components.

[0027] Depending on the type and shape of the connections to be examined, at least the end-side attachment element and / or other coupling elements of the coupling module can be variably, easily and quickly exchanged for differently designed connections to be examined, and a different attachment element and / or adapted coupling element can be connected to the coupling module and then placed on the connection to be examined of one component and sealed against the environment.

[0028] In one embodiment, at least one coupling element can be or comprise a rail. The rail can be attached to a component by means of a seal, for example, by means of at least one retaining device. The at least one rail can have a cavity into which at least the measuring probe can be inserted. The rail can have a longitudinal recess into which the measuring probe can be inserted and moved along the recess. The rail can be composed of a plurality of individual parts, for example, at least one straight section and / or at least one curved section. For example, the rail can be arranged or applied to a region on components where a battery cover and a battery housing are connected. The rail can be designed to correspond to a contour or external structure of a battery housing or battery cover.The at least one rail can be rigidly connected to at least one component under investigation by means of at least one clamping device. This has the advantage that the at least one rail is firmly connected to at least one component. The recess in the at least one rail can have a profile that corresponds to a contour of the component under investigation, for example, following the contour of a battery housing or battery cover. Thus, for example, the recess in the rail or the coupling element can be designed such that the measuring probe can be guided around components when moving along the recess, for example, around connections to be tested or other components of the component, in order to avoid a collision of the measuring probe with the at least one other component.

[0029] In one embodiment, it may be provided that a leak tightness test is performed between a battery housing and a battery cover. For this test, the battery cover and the battery housing are connected to each other by means of a plurality of clamps in such a way that a fixed assembly of the battery housing and the battery cover is simulated, i.e., that during the leak test, for example, a fixed connection between the battery housing and the battery cover by means of screws is omitted. Furthermore, a rail can be fixed to the component(s) by means of at least one clamp. The at least one clamp exerts a force on both the battery housing and the battery cover to fix them in a final position.

[0030] The components include, for example, a battery housing cover mounted on a battery casing and secured by screw connections. The retainer can have at least one hinged section at at least one end. This hinged section can be rotated, pivoted, or positioned within an angular range of approximately 0° to approximately 100° (e.g., 90°) relative to a central section of the retainer. The central section of the retainer allows a surface force to be transferred from the retainer to the battery housing cover and / or battery casing.

[0031] Additionally, the device may include an output unit, for example an audio output and / or a graphic output unit, in particular a screen.

[0032] The inventive method for examining a connection between two components for leak tightness can comprise the following steps: - Inserting the previously described measuring probe of the previously described measuring instrument into the previously described coupling module, - Positioning the coupling module at the connection to be examined on one of the components, - partial sealing of the coupling module relative to the connection under investigation, - Aligning the coupling module and / or the measuring probe inserted into it with a surface of the component using at least one of the coupling elements of the coupling module, - Procedure and / or movement of the measuring probe along the sampling space arranged over the connection to be investigated, and - Determining a leak in the connection at the component.

[0033] The process of moving the measuring probe with the coupling module can involve moving it along at least one guide rail. This guide rail can have a predefined geometric shape, allowing it to be applied almost exactly to at least one contour or surface finish of a component and to accommodate a measuring probe and a coupling module, guiding them along a predefined measuring path. The guide rail can include at least one recess that defines a measuring path for the probe. The guide rail can also have an insertion area, for example, an enlarged insertion area, for the measuring probe to facilitate insertion.A guide device can be provided at one end of the measuring probe, which can be inserted into the guide rail, to maintain an approximately constant distance between the measuring probe and the guide rail and / or the component under investigation. The guide rail can have a seal in the area facing a component, such as a battery housing and / or battery cover, to seal the respective component and the rail.

[0034] The measuring probe can be pre-assembled in the coupling module and, together with the module, manually placed and held on the area or joint of the component or test specimen to be examined. Alternatively, the coupling module can first be placed and held on the area or joint to be examined. The measuring probe can then be inserted into an end of the coupling module facing away from the area / joint to be examined, in particular via one or more guide channels within the coupling module, up to the sampling chamber.

[0035] The coupling module is always uniformly and statically aligned at the point / connection under investigation over an extended period. The point / connection under investigation can be shielded from its environment by the coupling module (encapsulated or covered).

[0036] In the event of a leak at the point / connection under investigation, a medium escaping from this point / connection, particularly a test gas, can escape and enter the sampling chamber in which the measuring probe is located. Such an unwanted entry of the medium into the sampling chamber occurs, for example, without air turbulence at the measuring head (also called the instrument tip of the measuring instrument), so that a leak can be reliably identified.

[0037] Exemplary embodiments of the invention are explained in more detail below with reference to a drawing.

[0038] This shows: Fig. 1. Schematic exploded view of a coupling module and a measuring instrument, Fig. 2. Schematic view in sectional and partial exploded view of one half of the coupling module and the measuring instrument inserted into the coupling module before being placed on a test object or connection to be examined, in particular on a component. Fig. 3 schematically in sectional view half of the coupling module and the measuring instrument inserted into the coupling module according to Fig. 2 in the state where the object under test, in particular the component, is placed on and connected to the area or connection to be examined, Fig. 4 schematically in sectional view an alternative embodiment of the coupling module in the state placed and connected on the test specimen at the point or connection to be examined, Fig. 5 schematically in sectional view another alternative embodiment of the coupling module in the state placed and connected on the test object at the point or connection to be examined, Fig. 6 schematically in sectional view another alternative embodiment of the coupling module in the state placed and connected on the test specimen at the point or connection to be examined, Fig. 7 schematically in sectional view another alternative embodiment of the coupling module in the state placed and connected on the test specimen at the point or connection to be examined, Fig. 8 schematically in top view a device for examining at least one connection to be examined between at least two components for leak tightness, and Fig. 9 schematically in sectional view the device according to Fig. 8.

[0039] Corresponding parts are marked with the same reference symbols in all figures.

[0040] Fig. Figure 1 schematically shows an exploded view of a coupling module and a measuring instrument.

[0041] The coupling module 1 according to the invention for coupling at least one measuring instrument 2 to at least one connection 4 to be examined (shown in Fig. 1 to 7, 9) between at least two components 5, 6 (shown in Fig. 1 to 7, 9) for testing this connection 4 for leak tightness comprises at least one measuring probe 2.1 of the measuring instrument 2 and a set of coupling elements 1.1 to 1.n. ​​The components 5 and 6 are connected to each other by means of a connecting element 8, for example a screw connection. In particular, the components 5 and 6 should be connected to each other in a medium-tight manner.

[0042] To investigate the tightness of this connection 4, the coupling module 1 described below and the device 10 described below (shown in Fig. 8) provided.

[0043] The coupling module 1 can comprise a set of multiple coupling elements 1.1 to 1.n. ​​The coupling module 1 can be designed as a mobile unit and, for example, comprise a case in the form of a toolbox or tool arrangement, in which all coupling elements 1.1 to 1.n and / or the measuring instrument 2 are arranged, and a predetermined number of coupling elements 1.1 to 1.5 can be removed and pre-assembled for variable assembly of the coupling module 1.

[0044] The measuring instrument 2 comprises at least the measuring probe 2.1. The measuring probe 2.1 can include a measuring head 2.3 at one probe end 2.2 and a suction unit 2.5 at a probe end 2.4 opposite the probe end 2.2. The suction unit 2.5 can, for example, comprise a suction hose 2.5.1 with a suction pump 2.5.2. The suction hose 2.5.1 is, in particular, made of a flexible material. The measuring probe 2.1 can be configured as a hollow cylindrical channel, in particular a solid hollow cylindrical channel or a hollow cylindrical tube. The measuring head 2.3 can be configured as an integrated end region of the measuring probe 2.1. In particular, the measuring head 2.3 can be configured as an end-face wall region of the measuring probe 2.1.

[0045] The measuring instrument 2 may also include an analysis unit 2.6 for analyzing a sample, in particular a medium analysis unit, such as a gas analysis unit and / or a liquid analysis unit, and / or an evaluation unit 2.7, in particular an electronic evaluation unit 2.7.

[0046] The measuring head 2.3 is specifically designed to measure a leak in the connection 4 under investigation. The measuring head 2.3 can, for example, include at least one sensor 2.3.1, in particular a fluid sensor, a gas sensor, or the like, for detecting a medium escaping from the connection under investigation, in particular a fluid, for example a gaseous and / or liquid fluid, and / or a sampling opening 2.3.2 for taking a sample via the suction unit 2.5. The sampling opening 2.3.2 is designed as a through-hole in the probe end 2.2 pointing towards the connection 4.

[0047] The respective coupling elements 1.1 to 1.n can be connected to each other in a form-fitting and / or force-fitting manner by forming a guide space 12 and a sampling space 14.

[0048] The guide chamber 12 of the respective coupling element 1.1 to 1.n is designed as a medium channel and serves to guide the sample taken in the area of ​​the sampling chamber 14 towards the analysis unit 2.6, which is optionally coupled to the evaluation unit 2.7 for the detection of a leakage of the connection 4 to be investigated.

[0049] One of the coupling elements 1.5, in particular an end-end attachment element 1.5.1, can be configured to couple with the connection 4 under investigation. In a coupled state 100 of the specified number of coupling elements 1.1 to 1.5, the measuring probe 2.1 is movably mounted in the respective guide chamber 12 of the coupling elements 1.1 to 1.5 up to the sample extraction chamber 14 in the coupling module 1, in particular being insertable or extendable. In the coupled state 100, the coupling elements 1.1 to 1.5 are configured to seal the inserted measuring probe 2.1 at least partially to the outside.

[0050] The coupling module 1 according to the invention has a modular structure in order to be able to couple the measuring instrument 2 to various connections 4 to be examined, in particular with different connecting elements 8, in particular to be able to couple in such a way that the measuring instrument 2 inserted into the coupling module 1 is sealed from the environment.

[0051] The multiple coupling elements 1.1 to 1.n (also called individual parts) can be variably assembled or mounted to form a module body, in particular a tube body. The module body can accommodate the measuring instrument 2 and, together with it, be manually placed and held on the connection 4 to be examined, in particular a screw connection 8.1 (as shown), of a test specimen, in particular one of the two interconnected components 5.

[0052] The invention can also include a coupling module 1, which is formed from only a single coupling element 1.3, in particular a base body 1.3.1, into which the measuring probe 2.1 can be inserted for measuring a leak or can be removed again after a measurement has been carried out.

[0053] The measuring probe 2.1 is at least partially or completely isolated from external environmental factors by means of the coupling elements 1.1 to 1.n in order to at least reduce or prevent an impairment of a measurement result, in particular of a sample taken from the sampling chamber 14, of the measuring probe 2.1 at the connection 4 of the test specimen under investigation.

[0054] Several or all of the coupling elements 1.1 to 1.n can be designed as identical parts. For example, the coupling elements 1.1 to 1.n can be identical and / or different with respect to shape and / or dimensions. For example, all coupling elements 1.1 to 1.n can be designed as identical hollow cylindrical parts (also called modularly connected / connectable, in particular screwed or detachably connected, hollow cylinders). Alternatively or additionally, the coupling elements 1.1 to 1.n can be identical or different with respect to their dimensions, in particular their length, diameter, or the like, and / or with respect to their shape, in particular round, angular, or the like.

[0055] In particular, the central coupling element 1.3 is designed as a base body 1.3.1 or basic element and has a greater length than the other coupling elements 1.1, 1.2, 1.4, and 1.5. The base body 1.3.1 can only have the guide chamber 12. Alternatively or additionally, the base body 1.3.1 can have the sample extraction chamber 14 (not shown). In the one-piece form of the coupling module 1, it only has the base body 1.3.1 with guide chamber 12 and sample extraction chamber 14.

[0056] The coupling elements 1.2 and 1.4 are designed, for example, as intermediate elements 1.2.1, 1.4.1 or extension elements and are of short length. These intermediate elements 1.2.1, 1.4.1 serve to extend the coupling module 1.

[0057] The end-facing coupling element 1.1, arranged in the direction of the measuring instrument 2, is designed as an alignment element 1.1.1, by means of which the measuring probe 2.1, inserted into the coupling module 2, can be aligned, in particular centered, before being inserted into the coupling module 2. For this purpose, the alignment element 1.1.1 can have alignment surfaces 1.1.2 or corresponding alignment contours in the area of ​​the guide channel 12 for aligning the measuring probe 2.1 when inserted into the alignment element 1.1.1. Additionally, the alignment element 1.1.1 can be positively and / or force-fit connected to the measuring probe 2.1. For example, the measuring probe 2.1 can be inserted into the coupling module 2 in a centered manner and, upon reaching the sample collection chamber 14, can be screwed to the alignment element 1.1.1, at least partially, in the area of ​​the alignment element 1.1.1.

[0058] An end-side coupling element 1.5 of the coupling module 1, arranged in the direction of the connection 4 under investigation, is designed as an attachment element 1.5.1 and can be placed directly or indirectly onto and / or inserted into this connection 4 under investigation (also called the connection point or measuring point). This attachment element 1.5.1 can be directly coupled to the connection 4 under investigation, in particular by means of a positive locking and / or force-locking connection.

[0059] Furthermore, the attachment element 1.5.1 can be designed to be axially and / or radially alignable and fixed in place above the connection 4 to be examined on the component 5 and / or to hold the connection 4 to be examined in a sealing manner to the outside.

[0060] This coupling element 1.5, designed as an attachment element 1.5.1, can additionally include a sealing element 18, in particular a sealing ring. The sealing element 18 can be integrated and form part of the attachment element 1.5.1. Alternatively, the sealing element 18 can be designed separately. The sealing element 18 can be configured to flexibly and flushly enclose the connection 4 under investigation, sealing it to the outside, so that the coupling module 1 and the relevant component 5 are designed to be sealable to each other and, in particular, are tightly connected to each other.

[0061] The coupling element(s) 1.5, 1.4 have a larger internal cavity that forms the sampling chamber 14. The respective sampling chamber 14 is designed as an expansion chamber or expanded space of the guide channel 12 and can, for example, have such dimensions and / or be configured that the measuring probe 2.1 can be moved manually or by means of a drive, in particular robot-assisted operation, along an inner contour of this expansion chamber designed as the sampling chamber 14. The sampling chamber 14 is designed to be particularly large enough to cover a head 8.1 of a connecting element 8, which projects from the component 5 and connects the two components 5 and 6, in particular with an axial and / or radial clearance 8.2. Preferably, the mounting element 1.5.1 can be placed on the head 8.1 with an axial clearance 8.2 and without play or play in the radial direction.

[0062] The other coupling elements 1.1 to 1.3 each have a smaller inner cavity, which is designed, for example, as a through-hole or through-opening and which is adapted, for example, to an outer shape and / or contour of the measuring probe 2.1.

[0063] The coupling elements 1.n (also called hollow cylinders or coupling elements) are connected or detachably connected to each other by means of locking elements 16, for example a screw connection (as shown), a snap connection, a bayonet connection or another suitable quick-release connection.

[0064] In one possible embodiment, all coupling elements 1.1 to 1.n and the measuring probe 2.1 comprise the same mutually complementary locking elements 16. For example, the mutually complementary locking elements 16 are configured to create a detachable connection, for example a screw connection, a bayonet connection, a pressure-lock connection, a hydraulic connection, a snap connection, a latch connection or the like, between the coupling elements 1.n and / or the measuring probe 2.1.

[0065] In particular, the attachment element 1.5.1 and / or the coupling elements 1.1 to 1.n can be uniformly aligned and held in a fixed or static position on the connection 4 under investigation by means of the complementary locking elements 16 for a longer period of time.

[0066] Additionally, an output unit 2.8, for example an audio output and / or a graphic output unit 2.8, in particular a screen, can be provided, by means of which a message, in particular an alarm, can be output when a leak is detected at connection 4 by means of the measuring instrument 2. For this purpose, the output unit 2.8 can be signal-linked to the evaluation unit 2.7, which in turn is or can be signal-linked to the analysis unit 2.6 and / or the sensor 2.3.1. For example, at least the duration of a measurement per screw can be communicated to an employee by means of a signal. For example, a measurement can be started by pressing a button. For example, a signal, such as a tone or a light, can be generated. For example, in the event of a "not OK" status, a tone can increase in volume and / or a light can be red.For example, if the status is "OK", a tone may remain the same and / or a light may be "green".

[0067] Fig. Figure 2 schematically shows, in sectional and partially exploded view, one half of the coupling module 1 according to Fig. 1 and the measuring probe 2.1 inserted into the coupling module 1 with the end of the base body 1.3.1 according to Fig. 1 before placing it on a point or connection to be examined 4 on the test specimen, in particular on component 5.

[0068] The coupling elements 1.1 to 1.5 are shown in exploded view. In the use of the coupling module 1, these are pre-assembled by means of the locking elements 16, and in particular detachably coupled to each other.

[0069] Fig. Figure 3 schematically shows in sectional view an alternative embodiment of the coupling module 1 in the coupled state 100 and in the state 102 placed on and connected to the connection 4 to be examined on the component 5. The coupling module 1' differs from the coupling module 1 according to Fig. 1 to Fig. 2 only in the form of the intermediate element 1.4.1.

[0070] Due to a different size of the connecting element 8, in particular a different size of the projecting head 8.1, the intermediate element 1.4.1 has larger dimensions, especially a larger radial width, as well as additional centering surfaces 1.4.2. The other coupling elements 1.1 to 1.3 and 1.5 are identical to the coupling module 1 according to Fig. 1 to Fig. 2 is formed because all coupling elements 1.1 to 1.5 can be coupled to each other by means of identical complementary locking elements 16. The measuring probe 2.1 is analogous to Fig. 1 trained.

[0071] The coupling module 1' and the measuring probe 2.1 inserted into the coupling module 1' are in a state 102, placed on and connected to the connection 4 to be examined on component 5. In this placed and connected state 102, the coupling module 1' and the measuring instrument 2 together form the device 10 for examining the connection 4 for leaks, which is determined by means of the Fig. 9 and Fig. 10 is described in more detail.

[0072] The measuring instrument 2, comprising the suction hose 2.5.1, the measuring probe 2.1 and the measuring head 2.3 connected thereto, is inserted into the coupling module 1 of the device 10 with the front probe end 2.2 (also called tip). The alignment element 1.1.1 allows the measuring instrument 2 to be quickly, easily and securely inserted and centered in the respective guide chamber 12 and fixed by means of the complementary locking elements 16, in particular the threads of screw connections.

[0073] Along the coupling elements 1.1 to 1.5 (also called device components), in particular the alignment element 1.1.1, the intermediate elements 1.2.1, 1.4.1, the base body 1.3.1 and the attachment element 1.5.1, the tip, in particular the front probe end 2.2 and thus the measuring head 2.3 of the measuring instrument 2, opens into the sample extraction chamber 14, which is surrounded by the inner wall of the attachment element 1.5.1 and the coupling element 1.4 including the sealing element 18, which comprises a material that flexibly and flushly encloses the connection 4 to be examined on the component 5.

[0074] Depending on the application, the main body or base body 1.3.1 can be supplemented and / or replaced by modular components, such as other coupling elements 1.1 to 1.2, 1.4 to 1.5. For example, the sampling chamber 14 can be extended by extension parts, such as one or more intermediate elements 1.4.1 with sampling chamber 14 and guide chamber 12, for example radially and / or axially, as shown in Fig. 3, Fig. 4 to Fig. 5 shown, variably designed, in particular enlarged or reduced in size. For example, the sampling chamber 14 can be extended axially with additional attachments, in particular attachment elements 1.5.1 with sampling chamber 14 and / or intermediate elements 1.2.1 with guide chamber 12, as shown in Figure 5. Fig. 4 or Fig. 5 shown, or similarly enlarged. For small compounds 4 under investigation, a smaller sampling chamber 14 can also be created by correspondingly smaller coupling elements 1.n, as shown in Fig. 6 shown.

[0075] Further modular coupling elements 1.1 to 1.n, in particular base bodies 1.3.1 and / or attachment elements 1.5.1 with sampling chamber 14 and / or intermediate elements 1.2.1, 1.4.1 with sampling chamber 14, may also have lateral openings, angled or additional outlets and / or access points for difficult-to-reach test points or connections 4 to be examined, as shown in Fig. Figure 7 illustrates this. For example, an angle can lie in a range from 0° to 90°, for example, it can be 90°.

[0076] The measuring instrument 2 is aligned uniformly and statically over extended periods by means of the described coupling module 1 when pointed at the test point or connection 4 and is shielded by the surrounding coupling elements 1.1 to 1.n of the device 10. Any medium, particularly a test gas, potentially escaping from leaks in the connection 4 can reach the instrument tip, especially the measuring head 2.3, in the sampling chamber 14 of the device 10 without air turbulence. Thus, the device 10 facilitates a precise examination.

[0077] Fig. Figure 4 schematically shows in sectional view another alternative embodiment of the coupling module 1" in the coupled state 100 and in the state 102 placed on and connected to the connection 4 to be examined on the component 5. The coupling module 1" differs from the coupling module 1 according to Fig. 1 to Fig. 2 or coupling module 1' after Fig. 3 in the form of the attachment element 1.5.1 of the end-side coupling element 1.5. Due to a different size of the connecting element 8, in particular a different size of the projecting head 8.1, the attachment element 1.5.1 has larger dimensions, in particular a greater axial length. The other coupling elements 1.1 to 1.4 are identical to the coupling module 1 according to Fig. 1 to Fig. 2 formed, since all coupling elements 1.1 to 1.5 can be coupled to each other by means of identical complementary locking elements 16.

[0078] Centering surfaces 1.4.2 are arranged in sampling chamber 14.

[0079] Fig. Figure 5 schematically shows in sectional view another alternative embodiment of the coupling module 1'" in the coupled state 100 and in the state 102 placed on and connected to the connection 4 under investigation.

[0080] The sampling chamber 14 is particularly axially extended and has centering surfaces 1.4.2 in the intermediate element 1.4.1 for aligning the coupling module 1"' on the connection 4 to be investigated.

[0081] Fig. Figure 6 schematically shows a further alternative embodiment of the coupling module 1 in a sectional view. IV in the coupled state 100 and in the state 102 placed on and connected to the connection 4 under investigation.

[0082] Sampling chamber 14 of coupling module 1 IV Compared to the other sampling chambers 14 of the coupling modules 1 to 1'", it is smaller, especially narrower in the radial direction and long in the axial direction.

[0083] Coupling module 11 IV The coupling elements 1.5 and 1.4 are omitted. The sampling chamber 14 is formed by an end section 1.3.2 of the guide chamber 12 of the base body 1.3.1.

[0084] The sampling chamber 14 does not have centering surfaces 1.4.2, as shown in Fig. 3, Fig. 4 to Fig. 5 shown, on.

[0085] Fig. Figure 7 schematically shows a further alternative embodiment of the coupling module 1 in a sectional view. V in the coupled state 100 and in the state 102 placed on and connected to the connection 4 under investigation.

[0086] At least the coupling element 1.4 is designed as an angled coupling element 1.4. For example, the coupling element 1.4 can be arranged at an angle to an adjacent coupling element 1.3 or 1.5, for example, in a range from 0° to 90°, such as 45° or 90°. At least one of the coupling elements 1.1 to 1.n can also be tubular, pipe-shaped, or channel-shaped.

[0087] For example, the respective coupling element 1.1 to 1.n can be designed as a hollow cylinder with or without a sampling chamber 14 (also called expansion chamber or extended chamber) and / or with a straight course and / or an angled course.

[0088] Fig. Figure 8 schematically shows in top view an embodiment of a device 10' for examining at least one connection 4 to be examined between at least two components 5, 6 for tightness.

[0089] The device 10' serves for the simple or simultaneous multiple examination of one or more, in particular two, connections 4 to be examined between at least two components 5, 6 (shown in Fig. 9) for tightness.

[0090] The device 10' includes a further alternative coupling module 1 VI , which extends over several connections 4 on components 5 and 6.

[0091] Fig. Figure 8 shows a subside of coupling module 1 VI , with which the coupling module 1 VI can be placed on component 5, as shown in Fig. 9 shown.

[0092] The coupling module 1 VI The component comprises two sealing elements 18, in particular two ring seals, at its end facing component 5. A first sealing element 18.1 is designed as an outer ring seal. A second sealing element 18.2 is designed as an inner ring seal. The sampling chamber 14 is arranged between the two sealing elements 18.1 and 18.2.

[0093] The coupling module 1 VI The recess 20 comprises a recess 20. The recess 20 is arranged approximately annularly between the two sealing elements 18.1 and 18.2, with interruptions in the form of webs or bridges 22. The recess 20 is designed as a guide space 12 for the measuring probe 2.1, as shown in Fig. Figure 9 shows the guide space 12, which can have a circular shape, for example, be approximately circular, and / or have an angular shape.

[0094] Fig. Figure 9 shows a schematic sectional view of the device according to Fig. 8.

[0095] The coupling module 1 VI It includes at least the coupling element 1.5 as the attachment element 1.5.1 and the coupling element 1.3 as the base body 1.3.1. Further coupling elements 1.1 to 1.2 can be coupled to the coupling element 1.3, as described above.

[0096] The attachment element 1.5.1 extends over several connections 4. The attachment element 1.5.1 can include a cover device 24 that extends over the connections 4 to be tested, in particular screw connections, on the component 5. The cover device 24 can be formed in one piece, for example as a shell, or in multiple parts, for example from several partial cover devices.

[0097] The sample recording chamber 14 is arranged in the vertical direction z below the recess 20, which is designed as a guide chamber 12 in the coupling elements 1.5 and 1.3.

[0098] The coupling module 1 VI The mounting element 1.5.1 is attached to component 5 in such a way that the sample receiving chamber 14 is located in the area of ​​the connection 4 between components 5 and 6. The measuring probe 2.1 is inserted into the coupling module 1 with its measuring head 2.3. VI The measuring head 2.3 is inserted, in particular pushed in, and guided within the recess 20 and the guide space 12 of the coupling elements 1.3 and 1.5 until the measuring head 2.3, for example, hits a stop in the attachment element 1.5.1 and is brought to the sample receiving space 14 in order to determine a possible leak in the connection 4 on the component 5.

[0099] The attachment element 1.5.1 is adapted to the shape and / or size of the connection 4 under investigation and the components 5 and 6 accordingly, and has attachment walls of different lengths. For example, an outer wall with the first sealing element 18.1 is longer in the vertical direction z than an opposing inner wall with the second sealing element 18.2. The sampling chamber 14 extends along the approximately circumferential recess 20. The recess 20 may be interrupted by bridges 22 (webs).

[0100] The measuring probe 2.1 can be inserted manually or by means of a drive into the coupling module 1. VI , in particular, be able to be inserted and arranged in the guide spaces 12 of the coupling elements 1.3, 1.5.

[0101] Furthermore, the measuring probe 2.1 can be moved or guided, in particular driven, manually or by means of a drive or robot, in particular motorized, over the circumferential sample extraction chamber 14 perpendicular to the axial extension of the guide spaces 12 along the recess 20 in the coupling elements 1.3, 1.5 and / or the cover device 24, in particular along the circular segment-shaped sections.

[0102] According to a further embodiment, a measuring tip described herein can be moved automatically, for example by means of a robot, across the entire surface of a high-voltage battery and controlled only by at least one collision sensor, for example at least one light barrier, one sound sensor, or one IR sensor, up to defined outer limits. This makes it possible to detect damage even outside defined points, to simplify the design and control system, to adapt the design and control system more flexibly to other battery types, and to achieve cost savings.

[0103] The end attachment element 1.5.1 and / or the further coupling elements 1.3 to 1.n can be easily and quickly exchanged and adapted to the further connection 4 to be examined.

[0104] Components 5 and 6, for example, are a battery housing cover placed on a battery housing and fastened by means of screw connections.

[0105] The inventive method for testing the one or more connections 4 between the two components 5, 6 for leak tightness can comprise the following steps and is applicable to all previously described coupling modules 1 to 1 VI applicable: - Inserting the previously described measuring probe 2.1 of the previously described measuring instrument 2 into the previously described coupling module 1 to 1 VI , - Arrange coupling module 1 to 1 VI at the at least one connection 4 to be examined or in the area of ​​the at least one connection 4 to be examined on one of the components 5 and / or 6, - partial sealing of coupling module 1 to 1 VI compared to the compound(s) under investigation 4, - Align the coupling module 1 to 1VI and / or the measuring probe 2.1 introduced therein to a surface of the component 5 and / or 6 by means of at least one of the coupling elements 1.1 to 1.n of the coupling module 1 to 1 VI , in particular by means of centering surfaces 1.4.2 (shown in Fig. 3, Fig. 4 to Fig. 5) and / or by means of a modification of the attachment element 1.5.1, - Procedure and / or movement of the measuring probe 2.1 along and / or over the sampling chamber 14, which is arranged over the connection(s) 4 to be examined, and - Determining a leak at connection(s) 4 on component 5 or 6.

[0106] The measuring probe 2.1 can be placed in the coupling module 1 to 1 VI pre-assembled and, together with this, manually placed and held on the area or connection(s) 4 of component 5, 6 to be examined. Alternatively, the coupling module 1 to 1 can first be VIThe measuring probe 2.1 is placed on and held against the connection(s) 4 to be examined. Subsequently, the measuring probe 2.1 can be inserted into an end of the coupling module 1 facing away from the connection 4 to be examined. VI introduced, in particular via one or more guide spaces 12 and / or recesses 20 within the coupling module 1 to 1 VI up to sampling room 14.

[0107] The coupling module 1 to 1 VI The connection 4 under investigation is always aligned uniformly and statically over a longer period of time at the point / connection 4 to be examined by means of a corresponding design of the coupling elements 1.1 to 1.n, in particular the end-side alignment element 1.1.1 and / or the end-side attachment element 1.5.1. The respective connection 4 to be examined is connected by the coupling module 1 to 1. VI shielded from the environment, in particular by medium-tight encapsulation or medium-tight covering.

[0108] In the event of a leak in the respective connection 4 under investigation, a medium escaping from this connection 4, in particular a test gas, can escape and enter the sampling chamber 14 in which the measuring probe 2.1 is located or adjacent to it. Such an unwanted entry of the medium into the sampling chamber 14 occurs, for example, without air turbulence at the measuring head 2.3, so that a leak can be reliably identified.

[0109] In particular, the medium escaping due to a leak at connection 4 can enter the sampling chamber 14 and thus reach the measuring head 2.3, which can be detected by the sensor 2.3.1 and / or guided by the suction unit 2.5 via the guide chamber 12 towards the analysis unit 2.6 and / or the evaluation unit 2.7.

[0110] Optionally, the measuring head 2.3 can protrude towards the sample collection chamber 14 at an angle of 0° to 90°, for example 90°, as shown in Fig. 7 shown.

[0111] The features and advantages described herein with respect to a coupling module may also apply to the device described herein for testing at least one connection to be tested between at least two components for leak tightness and to a method described herein for testing at least one connection between two components for leak tightness, and vice versa. Reference symbol list 1, 1', 1", 1'' to 1 VI Coupling module 1.1-1.n Coupling element 1.1.1 Alignment element 1.1.2 Alignment area 1.2.1 Intermediate element 1.3.1 Basic body 1.3.2 Section 1.4.1 Intermediate element 1.4.2 Centering surface 1.5.1 Add-on element 2 Measuring instrument 2.1 Measuring probe 2.2 Probe end 2.3 Measuring head 2.3.1 Sensor 2.3.2 Sampling opening 2.4 Probe end 2.5 Intake unit 2.5.1 Intake hose 2.5.2 Suction pump 2.6 Analysis Unit 2.7 Evaluation unit 2.8 Output unit 4. Connection / location to be examined 5 components 6 Component 8 Connecting element 8.1 Head 8.2 Game 10' Device 12 Command room 14 Sampling room 16 locking element 18 Sealing element 18.1 first sealing element 18.2 second sealing element 20 recesses 22 Bridge 24 Cover device 100 coupled state 102 connected state

Claims

[1] Coupling module (1 to 1 VI ) for coupling at least one measuring instrument (2) to at least one connection (4) to be examined between at least two components (5, 6) for examining this connection (4) for leak tightness, characterized by : - at least one measuring probe (2.1) of the measuring instrument (2) and - a set of coupling elements (1.1 to 1.n), wherein a predetermined number of coupling elements (1 to 1.n) can be connected to each other in a form-fitting and / or force-fitting manner, forming a guide space (12) and a sample collection space (14), and one of the coupling elements (1.1 to 1.n) is configured to couple with the connection (4) to be investigated and / or one of the components (5, 6) in an area of ​​the connection (4) to be investigated, wherein in a coupled state (100) of the specified number of coupling elements (1.1 to 1.n) the measuring probe (2.1) is movable in the guide chamber (12) and the sample extraction chamber (14) and the coupling elements (1.1 to 1.n) are arranged in the coupled state (100) to seal the measuring probe (2.1) to the outside. [2] Coupling module (1 to 1 VI ) according to claim 1, characterized by , that several or all of the coupling elements (1.1 to 1.n) are designed as identical parts. [3] Coupling module (1 to 1 VI ) according to claim 1 or 2, characterized by , that the coupling elements (1.1 to 1.n) are identical and / or different in terms of shape and / or dimensions. [4] Coupling module (1 to 1 VI ) according to any of the preceding claims, characterized by, that the respective coupling element (1.1 to 1.n) is designed as a hollow cylinder with or without expansion space and / or with a straight profile and / or angled profile. [5] Coupling module (1 to 1 VI ) according to claim 4, characterized by , that the expansion space of one or more of the coupling elements (1.1 to 1.n) forms the sampling space (14). [6] Coupling module (1 to 1 VI ) according to any of the preceding claims, characterized by , that all coupling elements (1.1 to 1.n) and the measuring probe (2.1) comprise mutually complementary closure elements (16). [7] Coupling module (1 to 1 VI ) according to claim 6, characterized by , that the mutually complementary locking elements (16) are arranged to create a detachable connection. [8] Coupling module (1 to 1 VI ) according to any of the preceding claims, characterized by, that the measuring instrument (2) additionally includes a suction unit (2.5) and / or a measuring head (2.3) and the measuring probe (2.1) is provided on one side with the suction unit (2.5) and on the other side with the measuring head (2.3) which is configured to measure a leakage of the connection (4) under investigation. [9] Device (10, 10') for testing at least one connection (4) to be tested between at least two components (5, 6) for tightness, characterized by a coupling module (1 to 1 VI ) according to one of the preceding claims, wherein in a coupled state (100) of the predetermined number of coupling elements (1.1 to 1.n) the measuring probe (2.1) is inserted via the guide chamber (12) to the sample extraction chamber (14) and the coupling elements (1.1 to 1.n) are arranged in the coupled state (100) to seal the measuring probe (2.1) to the outside. [10] Method for testing at least one connection (4) between two components (5, 6) for leak tightness, characterized by the following steps: - Inserting the measuring probe (2.1) of the measuring instrument (2) into a coupling module (1, 1', 1", 1'" to 1 VI ) according to any one of claims 1 to 8, - Arranging the coupling module (1) at the at least one connection (4) to be examined and / or in the area of ​​the at least one connection (4) to be examined on one of the components (5, 6), - partial complete sealing of the coupling module (1, 1', 1", 1'" to 1 VI ) compared to the compound under investigation (4), - Aligning the coupling module (1, 1', 1", 1"' to 1 VI ) and / or the measuring probe (2.1) introduced into it to a surface of the component (5., 6) by means of at least one coupling element (1.1 to 1.n) of the coupling module (1, 1', 1", 1"' to 1 VI 1.1 to 1.n), - Procedure or movement of the measuring probe (2.1) along the sampling chamber (14) and / or across the sampling chamber (14) which is arranged over the connection(s) (4) to be examined, and - Determining a leak in the connection(s) (4) at the component (5, 6).

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