DE102015216700A1 - Connecting device for connecting a measuring device to a terminal pole of an energy storage device of a motor vehicle - Google Patents

Abstract

The invention relates to a connection device (100) for connecting a measuring device (119) to a connection pole of an energy accumulator of a motor vehicle, having a connection terminal (101) which is designed to grip the connection pole by clamping, and a line element (103) having a first A connection region (105), which is connected to the connection terminal (101), and a second connection region (107), to which an electrical line is electrically connectable, wherein the conduction element (103) further comprises: a conductive bridge (109), which electrically connects the first connection region (105) to the second connection region (107), a first web (110) which extends from the first connection region (105), and a second web (111) which extends from the second connection region (107). 107), wherein the first web (110) and the second web (111) by recesses (113) formed in the conductive bridge (109) and aligned with each other, wherein the first web (110) and the second web (111) form a connection terminal for connecting the measuring device (119).

Description

TECHNICAL AREA

The present invention relates to the field of metrology in the field of energy storage in motor vehicles. In particular, the invention relates to a connection device for connecting a measuring device to a terminal pole of an energy storage device of a motor vehicle.

TECHNICAL BACKGROUND

In modern motor vehicles, an exact measurement of charging and discharging currents of an energy store of the motor vehicle, for example a vehicle battery, is important. For this purpose, measuring devices, such as battery sensors, are often installed in motor vehicles. These measuring arrangements often work by means of a measuring resistor, so-called shunt, which has a temperature resistance which is as constant as possible over the temperature. The shunt is often integrated into a main current path of the measuring arrangement and generates, if it is traversed by a current, an electrical voltage according to Ohm's law. This voltage is proportional to a resistance of the shunt and to the current flowing through the shunt and can be converted into a current value. The measurement of the shunt voltage and the conversion to the corresponding current value is often carried out by means of an electrical circuit which is electrically and mechanically connected to the shunt or the main current path of the measuring arrangement.

In modern battery sensors, the resistor is often generated in a defined region below the electrical circuit by a taper of the main current path, which is formed for example as a conductive bridge. However, such a taper increases the resistance of the main current path. In addition, a region of the conductive bridge formed by a taper can strongly heat up with a locally high resistance at high current flow. This can cause temperature gradients and resulting thermal stresses in the conductive bridge, which can interfere with measurement of the battery sensor.

DESCRIPTION OF THE INVENTION

It is therefore the object of the present invention to provide an efficient concept for detecting an electrical parameter of an energy storage device of a motor vehicle.

This object is solved by the subject matters of the independent claims. Advantageous embodiments of the invention are the subject of the dependent claims, the description and the figures.

According to a first aspect, the invention relates to a connecting device for connecting a measuring device to a terminal pole of an energy accumulator of a motor vehicle, with a terminal, which is designed to clamp the terminal pole clamped around, and a line element, with a first terminal region, which is connected to the terminal , and a second terminal region to which an electric wire is electrically connectable, the wire member further comprising: a conductive bridge electrically connecting the first terminal region to the second terminal region, a first land extending from the first terminal region, and a second land extending from the second land area, wherein the first land and the second land are formed by recesses in the conductive bridge and aligned with each other, wherein the first land and the second land connect form the terminal for connecting the meter. As a result, the technical advantage is achieved that the measuring device can record efficiently by means of an electrical contacting of the webs a measured variable occurring over the length of the bridge, for example a voltage. By connecting the measuring device to the first web and the second web, the measuring device can detect, for example, a voltage that accumulates over the entire length of the conductive bridge, since the first web is connected to the first connecting region and the second web is connected to the second connecting region. Thus, the greatest possible resistance of the bridge can be made available for the voltage measurement.

Furthermore, the measuring device may be smaller than the conductive bridge, or may have a smaller cross-sectional area than the conductive bridge, since contacting points for the measuring device on the first web and the second web may be close together due to their orientation to each other. On the installation of a pronounced measuring resistor or a taper of the conductive bridge between the first terminal region and the second terminal region, via which a falling voltage is measured, can thus be dispensed with. This can lead to a simplified manufacture of the connection device and to avoid local heating and temperature gradients in the conductive bridge.

The energy store may be an accumulator or a battery, in particular a starter battery or a vehicle battery of a motor vehicle. The energy store can be a lead-acid battery. Furthermore, the energy store can be a plus and a negative terminal to which a voltage of, for example, 12V or 24V may be applied.

In one embodiment, the first land, the second land, and the conductive bridge extend in the same plane. As a result, the technical advantage is achieved that a simple production of the line element, for example by means of punching or laser milling from a one-piece conductive plate can be done.

According to one embodiment, the first web and the second web are each formed by a recess and extend at the edge of the conductive bridge. As a result, the technical advantage is achieved that recesses can be arranged only on the bridge side facing the webs, whereby a simplified production of the line element can be done.

According to one embodiment, the first web and the second web are each formed by a recess and extend along a center axis of the conductive bridge. Thereby the technical advantage is achieved that the first web and the second web are mechanically and electrically shielded from the surrounding conductive bridge can. For example, the first web and the second web of the conductive bridge can be at least partially shielded from electromagnetic interference.

According to one embodiment, the first web and the second web are each formed by a recess and extend at opposite edges of the conductive bridge. As a result, the technical advantage is achieved that an efficient and particularly stable attachment of the meter can be done on both edges of the bridge.

According to one embodiment, the first web and the second web extend opposite and parallel to each other. Thereby, the technical advantage is achieved that the measuring device can detect a measured variable perpendicular to the current direction of the conductive bridge, transverse to the current direction of the conductive bridge, or against the current direction of the conductive bridge, thereby disturbing the measurement due to a current flow through the conductive bridge at least can be partially compensated.

According to one embodiment, the first web comprises at least one contact element for connecting the measuring device, and the second web comprises at least one further contact element for connecting the measuring device. This achieves the technical advantage that the measuring device can be efficiently connected to the first web and the second web.

According to one embodiment, the contact elements are designed as soldering pins or press-fit contacts for connecting the measuring device. As a result, the technical advantage is achieved that the measuring device can be efficiently connected to the first web and the second web for detecting at least one electrical parameter.

According to one embodiment, further webs are formed by further recesses in the bridge, the further webs extending from the first connecting region and / or the second connecting region and running parallel to the first web or to the second web. As a result, the technical advantage is achieved that the measuring device can be connected to the other webs for the detection of further measured variables. The further measured variables may be, for example, a constant or a temporally variable reference current, for example for determining a compensation factor for a thermal resistance change of the conductive bridge.

According to one embodiment, the further webs comprise further contact elements for connecting the measuring device. As a result, the technical advantage is achieved that the measuring device can be efficiently connected to the further webs for detecting at least one further electrical measured variable.

According to one embodiment, the conductive bridge has bridge sections which extend at an angle, in particular at an angle of 90 °, to one another, or the conductive bridge extends in a straight line. As a result, the technical advantage is achieved that the connection device can be designed to be particularly compact.

According to one embodiment, the conduit element is integrally formed. As a result, the technical advantage is achieved that a simple production of the line element, for example by means of punching technology from a one-piece conductive plate, can be done. Furthermore, contact resistances, which occur in the case of multi-part line elements at connection points, and power losses occurring at these contact resistances can be efficiently avoided. Likewise, high temperatures resulting from contact resistances, which can lead to temperature gradients and thermal stresses in the line element, can be avoided.

According to one embodiment, the conduit element is formed of a copper alloy. Thereby, the technical advantage is achieved that the line element can efficiently conduct high currents.

According to one embodiment, the second connection region has a connection for connecting the electrical line by means of screw or crimp connection. This achieves the technical advantage that the electrical line can be efficiently connected to the second terminal.

According to a second aspect, the invention relates to a measuring arrangement for detecting an electrical measured variable of an energy store, wherein the measuring arrangement comprises the connecting device according to one of the preceding claims and the measuring device which is connected to the line element of the connecting device. This achieves the technical advantage that the measuring arrangement can efficiently detect an electrical measured variable at the conductive bridge, while the energy store is connected to the electrical line via the connecting device.

According to one embodiment, the measuring arrangement comprises a printed circuit board with at least one sensor element, in particular a voltage sensor element. This achieves the technical advantage that the measuring arrangement can efficiently detect a voltage drop across the conductive bridge.

According to one embodiment, the measuring device comprises an analog-to-digital converter and / or a processor. As a result, the technical advantage is achieved that an analog measured variable detected by the measuring device can be converted into a digital signal and / or can be converted by the processor into another physical measured variable.

If the electrical measured variable is, for example, a voltage value which arises at the conductive bridge, then the processor can convert this voltage value, for example, into a current value. The current value may be, for example, a charging or discharging current of the energy store.

The processor may be a microprocessor which may be electrically connected to the sensor element and / or the analog-to-digital converter. Furthermore, the processor can comprise a memory in which reference values, for example a reference resistance of the measuring resistor, can be stored.

According to one embodiment, the measuring device comprises a temperature sensor element for detecting a temperature of the energy store and / or the connection device and / or the conductive bridge. As a result, the technical advantage is achieved that the temperature of the conductive bridge can be determined and taken into account in the calculation of the current value from the voltage drop across the conductive bridge.

DESCRIPTION OF THE FIGURES

Further embodiments will be explained with reference to the accompanying figures. Show it:

1 a schematic representation of a connection device;

2 a schematic representation of a connection device;

3 a schematic representation of a connection device;

4 a schematic representation of a connection device;

5 a schematic representation of a connection device; and

6 a schematic representation of a measuring arrangement.

DETAILED DESCRIPTION OF THE FIGURES

1 shows a schematic representation of a connection device 100 to connect an in 1 exemplified measuring device 119 to a terminal pole of an energy store of a motor vehicle according to an embodiment.

The connection device 100 for connecting the measuring device 119 to the terminal pole of the energy storage of the motor vehicle comprises a connection terminal 101 , which is designed to clampingly surround the terminal pole, and a line element 103 with a first connection area 105 , which with the terminal 101 is connected, and a second connection area 107 to which an electric wire is electrically connectable, a conductive bridge 109 , which is the first connection area 105 with the second connection area 107 electrically connects, a first bridge 110 which extends from the first connection area 105 extends, and a second bridge 111 which extends from the second connection area 107 extends, with the first bridge 110 and the second bridge 111 through recesses 113 in the conductive bridge 109 formed and aligned with each other, wherein the first web 110 and the second bridge 111 a connection terminal for connecting the meter 119 to shape.

According to one embodiment, the electrical resistance carries the entire distance between the first connection region 105 and the second connection area 107 for generating an ohmic voltage drop. The detection of this ohmic voltage drop by the meter 119 can for determining a charging or discharging the energy storage, which, for example, also by the meter 119 can be used.

According to a further embodiment, the webs 110 . 111 aligned with each other, and the ends of the webs can be close together. Consequently, also the contact points 115 on the jetties 110 . 111 to which the meter 119 to the footbridges 110 . 111 is connected, close together. Thus, the meter can 119 have compact dimensions, in particular, the measuring device 119 a smaller cross-sectional area than the connecting device 100 or the conductive bridge 109 exhibit.

2 shows a schematic representation of the connection device 100 according to an embodiment with exemplified meter 119 , where the first bridge 110 and the second bridge 111 along a central axis of the conductive bridge 109 run.

By the arrangement of the first bridge 110 and the second bridge 111 according to 2 can the webs 110 . 111 be particularly mechanically and electrically protected by the conductive bridge. In particular, the webs of the conductive bridge against electromagnetic interference can be shielded.

3 shows a schematic representation of the connection device 100 according to an embodiment with exemplified meter 119 , where the first bridge 110 and the second bridge 111 at opposite edges of the conductive bridge 109 run.

According to one embodiment, the contact points 115 for connecting the measuring device 119 on opposite edges of the conductive bridge 109 arranged. Thus, the meter can 119 a measured variable perpendicular to the current direction of the conductive bridge 109 , transverse to the current direction of the conductive bridge 109 , or against the current direction of the conductive bridge 109 capture, thereby disturbing the measurement due to a current flow through the conductive bridge 109 at least partially compensated.

4 shows a schematic representation of the connection device 100 according to an embodiment with exemplified meter 119 , wherein the connecting device 100 two more bars 401 . 403 includes, which are parallel to the first bridge 110 or to the second bridge 111 run.

According to one embodiment, the further webs 401 . 403 for detecting a further measured variables by the measuring device, for example a constant or temporally variable reference current used. In this way, for example, a compensation factor for a thermal resistance change of the conductive bridge 109 be determined.

5 shows a schematic representation of the connection device 100 according to an embodiment with exemplified meter 119 , where the conductive bridge 109 extends in a straight line.

As is the conductive bridge 109 in 5 extends in a straight line, for example, safety distances between the contact points 115 on the first jetty 110 and the second footbridge 111 , the connection terminal 101 and the electrical line are respected. Further, a bend or an angled course of the first web 110 and / or the second bridge 111 be avoided, thereby increasing the mechanical stability of the first web 110 and / or second bridge 111 can be increased.

6 shows a schematic representation of a measuring arrangement according to an embodiment. The measuring arrangement comprises the measuring device 119 , which is connected to the connection device 100 is connected according to one of the aforementioned embodiments, and which of a housing 601 is surrounded.

According to one embodiment, the housing 601 a plastic housing, for example an injection-molded housing, or a metallic housing. The housing 601 can the meter 119 protect against mechanical and / or electromagnetic interference.

According to another embodiment, the housing encloses 601 the meter 119 , According to another embodiment, the housing encloses 601 the meter 119 and at least partially the conductive bridge 109 ,

According to a further embodiment, for the protection of the measuring device 119 the mechanical stability of the conductive bridge 109 in the range of the measuring device 119 increase. For example, the conductive bridge 109 in the range of the measuring device 119 have an enlarged cross-sectional area.

According to a further embodiment, the measuring device comprises 119 a circuit board with an electrical circuit. The printed circuit board may be, for example, a single-sided or a double-sided printed circuit board, a multi-layer printed circuit board, a flexible printed circuit board or a ceramic printed circuit board.

According to a further embodiment, the measuring device comprises 119 a temperature sensor for detecting the temperature of the conductive bridge 109 to a temperature-induced change in the resistance of the conductive bridge 109 in calculating the current from the voltage drop across the conductive bridge 109 to compensate.

According to another embodiment, the conductive bridge 109 trained as a shunt.

According to a further embodiment, the measuring device comprises 119 an integrated circuit having at least one sensor element, in particular a voltage sensor element.

According to a further embodiment, the energy store is a battery of the motor vehicle.

LIST OF REFERENCE NUMBERS

100

 connection device

101

 terminal

103

line element

105

 first connection area

107

 second connection area

109

 conductive bridge

110

 first jetty

111

 second bridge

113

 recess

115

 contact point

117

 connection

119

 gauge

401

 another footbridge

403

 another footbridge

601

 casing

Claims (15)

Connection device ( 100 ) for connecting a measuring device ( 119 ) to a terminal pole of an energy accumulator of a motor vehicle, comprising: a terminal ( 101 ), which is designed to grip the terminal pole by clamping; and a conduit element ( 103 ), with a first connection area ( 105 ), which with the terminal ( 101 ) and a second connection area ( 107 ), with which an electrical line is electrically connectable, wherein the line element ( 103 ) further comprises: a conductive bridge ( 109 ), which the first connection area ( 105 ) with the second connection area ( 107 ) electrically connects; a first jetty ( 110 ), which extends from the first connection area ( 105 ) extends; and a second bridge ( 111 ) extending from the second terminal area ( 107 ) extends; the first bridge ( 110 ) and the second bridge ( 111 ) through recesses ( 113 ) in the conductive bridge ( 109 ) are formed and aligned with each other, wherein the first web ( 110 ) and the second bridge ( 111 ) a connection terminal for connecting the measuring device ( 119 ) to shape. Connection device ( 100 ) according to claim 1, wherein the first bridge ( 110 ), the second bridge ( 111 ) and the conductive bridge ( 109 ) in the same plane. Connection device ( 100 ) according to claim 1 or 2, wherein the first bridge ( 110 ) and the second bridge ( 111 ) each through a recess ( 113 ) and at the edge of the conductive bridge ( 109 ). Connection device ( 100 ) according to one of the preceding claims, wherein the first bridge ( 110 ) and the second bridge ( 111 ) each through a recess ( 113 ) and along a central axis of the conductive bridge ( 109 ). Connection device ( 100 ) according to one of the preceding claims, wherein the first bridge ( 110 ) and the second bridge ( 111 ) each through a recess ( 113 ) and at opposite edges of the conductive bridge ( 109 ). Connection device ( 100 ) according to claim 5, wherein the first bridge ( 110 ) and the second bridge ( 107 ) extend oppositely and parallel to each other. Connection device ( 100 ) according to one of the preceding claims, wherein the first bridge ( 110 ) at least one contact element for connecting the measuring device ( 119 ), and wherein the second bridge ( 111 ) at least one further contact element for connecting the measuring device ( 119 ). Connection device ( 100 ) according to claim 6, wherein the contact elements as soldering pins or press-fit contacts for connecting the measuring device ( 119 ) are formed. Connection device ( 100 ) according to one of the preceding claims, wherein further webs ( 401 . 403 ) by further recesses ( 113 ) in the conductive bridge ( 109 ) are formed, with the other webs ( 401 . 403 ) from the first connection area ( 105 ) or the second connection area ( 107 ) extend and parallel to the first bridge ( 110 ) or to the second bridge ( 111 ). Connection device ( 100 ) according to one of the preceding claims, wherein the conductive bridge ( 109 ) Has bridge sections, which extend at an angle, in particular at an angle of 90 ° to each other, or wherein the conductive bridge ( 109 ) extends in a straight line. Connection device ( 100 ) according to one of the preceding claims, wherein the conduit element ( 103 ) is integrally formed. Connection device ( 100 ) according to one of the preceding claims, wherein the conduit element ( 103 ) is formed of a copper alloy. Connection device ( 100 ) according to one of the preceding claims, wherein the second connection region ( 107 ) a connection ( 117 ) for connecting the electrical line by means of screw or crimp. Measuring arrangement for detecting an electrical measured quantity of an energy store, wherein the measuring arrangement comprises the connecting device ( 100 ) according to one of the preceding claims and the measuring device ( 119 ), which to the line element ( 103 ) of the connection device ( 100 ) is connected. Measuring arrangement according to claim 13, wherein the measuring arrangement comprises a printed circuit board with at least one sensor element, in particular a voltage sensor element.

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