DE102012215558A1 - Measuring bridge i.e. measuring shunt, for sensor arrangement to determine operational parameters of battery in motor car, has resistor portion arranged between contact portions, which are rotated at specific degree - Google Patents

Abstract

The bridge (2) has a resistor portion (14) arranged between contact portions (6, 8). The contact portions are rotated around 90 degree. Twist guards (16, 22) are provided in a curved portion. Two parts (10, 12) are connected with the contact portions. Two linking modules are fixed with a counter part. An angular aperture is formed in cross-section of a retainer of an n-angular bolt. An independent claim is also included for a sensor arrangement.

Description

The invention relates to a measuring bridge and a sensor arrangement.

State of the art

A measuring bridge, which can also be referred to as a measuring shunt, can be designed as part of a battery sensor for determining operating parameters of a battery, usually a battery for a motor vehicle. In this case, such a measuring bridge is designed rod-shaped and comprises a central portion which comprises an electrical resistance. This central portion is disposed between two end portions formed of a metal having a good electrical conductivity. When using the measuring bridge as part of the electric battery sensor is provided that one of the two end portions is usually connected via a suitable connection module with a pole terminal of the battery. The other end portion may be connected to a cable via which power is to be conducted to an electrical device.

The measuring bridge for the electric battery sensor is therefore designed as a flat unit and may possibly also be connected to the pole terminal of the battery undetachably. In addition, it is provided to electrically and mechanically connect an end portion of the measuring bridge with the pole terminal of the battery, which is, for example, by thermal joining methods such as soldering or welding or by deformation, for example. Clamps, clinching or Toxen possible. In addition, the other end section of the measuring bridge must be electrically insulated from the pole terminal, whereby a current flow can be realized over the middle section of the measuring bridge.

Disclosure of the invention

Against this background, a measuring bridge and a sensor arrangement with the features of the independent claims are presented. Further embodiments of the invention will become apparent from the dependent claims and the description.

The measuring bridge according to the invention and thus a measuring shunt according to the invention can be constructed in one or more parts, for example in two parts, and have at least one n-shaped cross-section for providing anti-rotation protection. The at least one n-angular cross-section designed as a torsion protection along a longitudinal axis of the measuring bridge can be designed, for example, as a square (quadrilateral) or as a polygon, so that the measuring bridge can also be formed as a round part at least in the section of the n-angular cross section. Usually, the cross section of the anti-rotation protection in the form of a regular n-corner, in which all the edges have the same length and angles at corners of the n-corner are the same size. However, it is also possible that the cross-section has the shape of any irregular n-corner, in which, for example, at least one angle is stumped over, d. H. greater than 180 °, for example 270 °, can be.

The measuring bridge comprises two contact sections, which are arranged at end sections of the measuring bridge and enclose a resistance section in a middle section of the measuring bridge, so that the resistance section is arranged between the two contact sections. The resistance section comprises at least one electrical resistance, which is usually formed from a resistance material, for example manganin, whereas the contact sections are formed from a metal having high electrical conductivity, for example from copper.

A first contact section of the measuring bridge can be connected to a pole terminal of a battery and accordingly also via the pole terminal to one pole of the battery. A second contact section can, for example, be connected via a cable lug to a cable and thus contacted with it. The cable can typically be connected to an electrical device that is to be powered by the battery. Accordingly, the measuring bridge between the battery and the device is interposed. At least one operating parameter of the battery, for example its temperature and / or at least an electrical size of the battery, can be measured with the measuring bridge.

Along the measuring bridge a bend is arranged by 90 ° and thus a section bent by 90 °. Accordingly, longitudinal axes of the two contact portions, each of which on an outer wall a thread for providing the contact with another module, for example. The pole terminal, may have, oriented at a right angle to each other, so that the longitudinal axis of a first of the two contact portions depending on the definition horizontally and the longitudinal axis of the second contact portion oriented perpendicular thereto and thus arranged.

In one possible embodiment, the cross-section serving as protection against twisting along the measuring bridge can be designed as octagonal and thus octagonal. Thus, it is possible that one of the two contact portions on which a thread can be arranged with respect to its position by 45 °, ie in 45 ° increments, can be rotated, wherein the one contact portion relative to the other contact portion a number of Positions may occupy the number of pages and thus Corresponds to edges or corners of the n-shaped cross-section of the usually regular n-corner.

If the cross-section of the anti-twist protection is formed as a regular, isosceles n-corner (polygon), the angle by which one contact section is rotatable relative to the other contact section between two positions is 360 ° / n.

By providing at least one thread on at least one of the contact sections, the measuring bridge is to be screwed by means of a detachable connection to the pole terminal. The twist protection of the measuring bridge to be provided relative to the pole terminal and thus relative to the battery in a desired, intended for installation position is, for example, to realize by contact one side of the n-angular cross-section of Verdrehschutzes on the pole terminal and / or an outer wall of the battery.

The sensor arrangement, usually an electronic battery sensor (EBS), comprises in design several components, namely an embodiment of the measuring bridge described here and a soldered printed circuit board with electrical components, this printed circuit board is protected by a molded housing (mold housing). In this case, the measuring bridge comprises the two contact sections formed in the form of copper and the resistance section arranged between the two contact sections and comprising the electrical resistance. Threads on the contact sections make it possible to provide robust mechanical and electrical connections and thus contacts.

Usually, the measuring bridge on the one hand, d. H. via a first of the two contact sections, with the pole terminal for the battery and on the other hand, d. H. to connect with the second of the two contact portions with the pole piece of the cable. This is simplified in that a nut for attaching the pole terminal to the second contact portion is easy to screw on the thread of this second contact portion. In addition, it is possible to dispense with an insulating part between the pole terminal and the measuring bridge, since a molded-on housing sufficiently protects the measuring bridge. Since the measuring bridge is designed to be movable and / or to be arranged flexibly with respect to its position, the electric battery sensor can be mounted independently of an embodiment of the pole terminal for the battery in the vicinity of the pole of the battery.

The measuring bridge, with which a connection between the pole of the battery and the cable lug can be provided, can be used in an embodiment for the electric battery sensor. However, it is also possible to use the measuring bridge, which is usually referred to as a measuring shunt, in control units, sensors or other electronic devices with so-called shunt interfaces. A measurement of an electrical resistance is possible via the resistance section of the measuring bridge, which is firmly connected to a printed circuit board of an electronic module via conductor modules, which may be formed as copper sleeves or wires. The measuring bridge and the sensor arrangement are to be used in an embodiment for a battery of a motor vehicle.

Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.

Brief description of the drawings

1 shows a schematic representation of a first embodiment of the measuring bridge described from different perspectives.

2 shows a schematic representation of parts of a second embodiment of the proposed measuring bridge from different perspectives.

3 shows details of an operation of the second embodiment of the measuring bridge in a schematic view.

4 shows a schematic representation of an embodiment of the described sensor arrangement comprising the second embodiment of the measuring bridge.

5 shows a schematic representation of a third embodiment of the measuring bridge.

Embodiments of the invention

The invention is schematically illustrated by means of embodiments in the drawings and will be described in detail below with reference to the drawings.

The figures are described in a coherent and comprehensive manner, like reference numerals designate like components.

The first embodiment of the measuring bridge according to the invention 2 is in 1a from a first and in 1b shown schematically from a second perspective.

The first embodiment of the measuring bridge 2 is designed in several parts and includes two parts here 10 . 12 which are releasably connectable to each other. This includes the first part 10 the first contact section 6 and the second part 12 next to the second contact section 8th also a resistance section 14 , The first part 10 is after separating the two parts 10 . 12 relative to the second part 12 rotatable and connect to this again. In addition, the second part includes 12 an octagonal here in cross-section Verdrehschutz 16 , On an outer wall of the second contact portion 8th of the second part 12 is also a thread 18 arranged. The measuring bridge 2 is by connecting her two parts 10 . 12 mountable.

The first part 10 the measuring bridge 2 also includes a bend and thus a 90 ° bent section 20 that is between the first contact section 6 and the resistance section 14 is arranged. Thus, if the two parts 10 . 12 connected to each other, that a longitudinal axis of the first contact portion 6 , which may also be referred to as a rotation axis, and a longitudinal axis of the second contact portion 8th , which can also be referred to as a rotation axis, rotated by 90 ° to each other and / or are oriented.

As a further component comprises the first part 10 also a twist protection 22 for providing a support on an example. Electronic module of a sensor arrangement not shown here. On an outer wall of the first contact section 6 is also a thread 24 arranged on here for attaching a cable lug 26 A mother 28 screwed.

It is further contemplated that the resistance section 14 as a component of the second part 12 is provided, has an octagonal outer wall. This octagonal outer wall is formed as a first connection module, which here in an octagonal opening, not shown, as a second connection module of Verdrehschutzes 22 is to be inserted. Thus, it is possible the first part 10 holding the curved section 20 has, via the two counterpart connection modules at different angles relative to the second part 12 to turn and after joining, usually mating the two parts 10 . 12 to flexibly position one another via their connection module.

In the 2a . 2 B and 2c are a first part 30 and a second part 32 the second embodiment of the measuring bridge according to the invention 34 shown separated from each other. This includes the first part 30 a first contact section 36 , on whose outer wall a thread is arranged. Furthermore, the first part includes 30 a bend, ie a section bent by 90 ° 38 , As well as provided as a support section anti-rotation 40 with a first connection module 42 , which is designed here as an octagonal opening.

This shows a cross section of the rotation protection 40 the shape of a partially broken octagon, which means that two adjacent corners of this broken octagon completely formed and the other six corners replaced by depressions, ie recessed. In this partially broken octagon, only one side between the two fully formed corners is completely formed, whereas the other sides are interrupted at locations of the recesses which replaced the other corners.

The second part 32 includes a second contact portion 44 , on whose outer wall a thread is arranged, and a twist protection 46 whose cross section has the shape of two juxtaposed rectangles, wherein a first rectangle is smaller than a second rectangle, so that the cross section of the anti-rotation 46 has eight corners, with six of these corners each have an angle of 90 ° and two of these corners each have an angle of 270 °. Consequently, the cross section of this anti-rotation 46 the shape of a quadrangle, which is formed as a partially interrupted square, in which two adjacent corners completely formed and the other two corners are replaced by rectangular recesses here. Thus, in this broken square, only one side is completely formed. The three other pages are replaced at points of the two wells by this and thus interrupted.

Furthermore, the second part comprises 32 a resistance section 48 , to which in turn a second connection module 50 connects, whose cross section is formed as a regular octagon and / or as an octagonal bolt. As indicated by the double arrow in 2 B hinted, it is possible the two parts 30 . 32 the second embodiment of the measuring bridge 34 over the two mutually oppositely formed connection modules 42 . 50 releasably connect to each other, wherein the connecting element 50 of the second part 32 in the connection module 42 of the first part 30 is to introduce. A contour of a connection module 42 . 50 corresponds to a mating contour of the other connection module 50 . 42 and vice versa. The two parts 30 . 32 are in this case in eight variants to each other positionable and / or orientable, wherein the first part 30 , the bent part 38 relative to the second part 32 is rotatable. The measuring bridge 34 is by connecting the two parts 30 . 32 provide.

As in this regard the 3a to 3c show, it depends on how the two parts 30 . 32 For example, by nesting the connection modules 42 . 50 connected to each other, possible, the first part 30 with the contact section 36 at different angles to the second part 32 to position. Depending on the definition, the angle is the first part 30 in 3a relative to the second part 32 oriented at 45 °. In 3b is the first part 30 to the second part 32 around 90 ° and in 3c oriented at 135 °.

In the basis of the 4a to 4d shown embodiment of the described sensor arrangement 51 , which is the second embodiment of the measuring bridge described above 34 is adjacent to the contact section 36 as well as the bend 38 of the first part 30 and the twist protection 40 of the second part 32 the second embodiment of the measuring bridge according to the invention 34 an electronic module 49 shown. This electronic module 49 includes a printed circuit board 54 in a housing 52 is arranged. This circuit board 54 is here via wire-shaped conductor modules 56 with the resistance section 48 the measuring bridge 34 connected.

It is envisaged that the contact section 44 of the second part 32 in the case 52 is plugged in. Furthermore, a lower edge of Verdrehschutzes 46 on the housing 52 of the electronic module 49 rotatably positioned. However, it is still possible, a longitudinal axis of the first contact portion 36 of the first part 30 the measuring bridge 34 at different angles relative to the housing 52 of the electronic module 49 and to a longitudinal axis of the second contact portion 44 , the second part 32 to position and thus to orient. These are the two connection modules 42 . 50 the two parts 30 . 32 which have mutually oppositely formed contours to position relative to each other as needed.

In detail, the longitudinal axis of the contact section 36 relative to the housing 52 in 4a around 0 °, in 4b at 45 °, in 4c around 90 ° and in 4d oriented at 135 °. Furthermore, on the external thread of the contact section 36 of the first part 30 a cable lug 58 a cable over a mother 60 screwed.

In the 5 schematically illustrated third embodiment of the measuring bridge according to the invention 70 is in contrast to the presented with reference to the above figures multipart embodiments of the measuring bridge 2 . 34 formed in one piece or in one piece.

This measuring bridge 70 includes a first contact section 72 , on whose outer wall a thread is arranged, a bent portion 74 with a bend, a first twist protection 76 which has an octagonal cross section here, a resistance section 78 , a second twist protection 80 also octagonal cross section and a second contact section 82 , on whose outer wall a thread is arranged.

Each of the presented measuring bridges 2 . 34 . 70 has a resistance section 14 . 48 . 78 and a first and a second contact portion 6 . 8th . 36 . 44 . 72 . 74 at the same time as the end sections of the measuring bridge 2 . 34 . 70 are formed. Here is the resistance section 14 . 48 . 78 between the two contact sections 6 . 8th . 36 . 44 . 72 . 74 to arrange. Longitudinal axes of the two contact sections 6 . 8th . 36 . 44 . 72 . 74 are rotated 90 ° to each other.

In addition, each measuring bridge points 2 . 34 . 70 at least one twist protection 16 . 22 . 40 . 46 . 76 . 80 with a n-shaped cross section. Here, at least one cross section may have the shape of a regular n-corner. However, it is also possible that at least one cross section has the shape of a usually regular n-corner, which may be partially interrupted.

It is also possible in an embodiment that the cross-section of an anti-twist protection is designed as a star-shaped 2n-corner or star polygon which has n peaks with n acute angles and n superficial angles which are greater than 180 °. In this case, a ten-cornered cross section may have the shape of a pentagram (2 × 5 = 10) and a dodecagonal cross section may have the shape of a hexagram (2 × 6 = 12). Furthermore, it is conceivable to use a Verdrehschutz whose cross section has the shape of a Greek cross.

To provide the intended orientation of the longitudinal axes of the contact portions 6 . 8th . 36 . 44 . 72 . 74 points out each of the measuring bridges presented here 2 . 34 . 70 a 90 ° bent section 20 . 38 . 74 on, which includes a bend and therefore a corner piece or elbow.

Furthermore, one end of an outer wall of at least one contact section 6 . 8th . 36 . 44 . 72 . 74 a measuring bridge 2 . 34 . 70 have a thread.

It is envisaged that the basis of 5 presented third embodiment of the measuring bridge 70 one-piece and thus one-piece, ie consisting of a compact part, is formed.

In contrast to this, the first and second embodiments of the measuring bridge 2 . 34 two parts each 10 . 12 . 30 . 32 on, which are connectable and detachable from each other, each part 10 . 12 . 30 . 32 one of the contact sections 6 . 8th . 36 . 44 includes. The multi-part bridge 2 . 34 is by flexibly connecting the two parts 10 . 12 . 30 . 32 available as needed. Here is that part 10 . 30 holding the curved section 20 . 38 relative to the other part 12 . 32 rotatable before providing a connection.

In this case, each of the two parts 10 . 12 . 30 . 32 a measuring bridge 2 . 34 , a connection module 42 . 50 on, wherein a first connection module 42 a contour and a second connection module 50 one to the contour of the first connection module 42 has counterpart and / or complementary formed counter contour. In an embodiment, the second connection module 50 a cross-sectionally n-shaped bolt and the first connection module 42 have a cross-sectionally n-shaped opening for receiving the n-square bolt. In this case, the n-square bolt is formed as a counterpart to the n-angular opening.

In a further, not figuratively illustrated embodiment of a measuring bridge, it is possible that this measuring bridge has more than two parts, for example three parts. In this case, a first part as a contact portion, a second part as a resistance portion and a third part in turn formed as a contact portion, wherein the two contact portions, which are also formed as end portions of a metal with high electrical conductivity, eg. Of copper, and the resistance portion of a resistance material, for example. Manganin, are formed.

In this case, it is provided that the first contact section has a connection module and the resistance section has a first connection module on a first outer side. For connecting the first contact section to the resistance section, the two connection modules are inserted into one another. In addition, the resistance section has a second connection module on a second outer side opposite the first outer side. The second contact section also has a connection module. In this case, for connecting the resistor section to the second contact section, it is provided that the second connection module is inserted into the second outer side of the resistance section and the connection module is inserted into one another at the second contact section. It is provided in the three-part embodiment of the measuring bridge described here, that along at least one of the parts of the measuring bridge, usually only along one of the parts of the measuring bridge, a bent portion is provided. In this case, this bent portion may be provided either along one of the contact portions or along the resistance portion between the two contact portions.

In the 4 shown embodiment of the sensor arrangement according to the invention 51 indicates the circuit board 54 and the second embodiment of the measuring bridge 34 on, with the circuit board 54 and the measuring bridge 34 to connect with each other. This sensor arrangement 51 is usually for in-service detection of at least one operating parameter, for example. An electrical variable, such as current, voltage, resistance or power, and / or other physical size, for example. The temperature of a battery formed, wherein a contact portion 6 . 8th . 36 . 44 to connect with a pole terminal and / or a battery.

Claims (10)

Measuring bridge, which has a resistance section ( 14 . 48 . 78 ) and a first and a second contact section ( 6 . 8th . 36 . 44 . 72 . 74 ), wherein the resistance section ( 14 . 48 . 78 ) between the two contact sections ( 6 . 8th . 36 . 44 . 72 . 74 ), and wherein longitudinal axes of the two contact sections ( 6 . 8th . 36 . 44 . 72 . 74 ) are rotated by 90 ° to each other. Measuring bridge according to claim 1, the at least one twist protection ( 16 . 22 . 40 . 46 . 76 . 80 ) having. Measuring bridge according to claim 2, in which the at least one anti-rotation protection ( 16 . 22 . 40 . 46 . 76 . 80 ) has an N-cornered cross-section. Measuring bridge according to one of the preceding claims, comprising a curved section ( 20 . 38 . 74 ) having. Measuring bridge according to one of the preceding claims, which is formed in one piece. Measuring bridge according to one of claims 1 to 4, the two parts ( 10 . 12 . 30 . 32 ), which are connectable and detachable from each other, each part ( 10 . 12 . 30 . 32 ) one of the contact sections ( 6 . 8th . 36 . 44 ). Measuring bridge according to claim 6, in which each part ( 10 . 12 . 30 . 32 ) a connection module ( 42 . 50 ), wherein a first connection module ( 42 ) a contour and a second connection module ( 50 ) one to the contour of the first connection module ( 42 ) has counterpart formed counter-contour. Measuring bridge according to Claim 7, in which the second connection module ( 50 ) a cross-sectionally n-shaped bolt and the first connection module ( 42 ) has a cross-sectionally n-shaped opening for receiving the n-sided bolt. Sensor arrangement comprising a printed circuit board ( 54 ) and a measuring bridge ( 2 . 34 . 70 ) according to one of the preceding claims, wherein the printed circuit board ( 54 ) and the measuring bridge ( 2 . 34 . 70 ) are to be connected to each other. Sensor arrangement according to claim 9, which is designed to detect at least one operating parameter of a battery, wherein a contact section ( 6 . 8th . 36 . 44 . 72 . 74 ) is to be connected to a pole terminal of the battery.

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