WO2017036723A1

WO2017036723A1 - Connection device for connecting a measuring device to a connection pole of an energy store of a motor vehicle

Info

Publication number: WO2017036723A1
Application number: PCT/EP2016/068557
Authority: WO
Inventors: Martin Schramme
Original assignee: Continental Automotive Gmbh
Priority date: 2015-09-01
Filing date: 2016-08-03
Publication date: 2017-03-09
Also published as: DE102015216700A1

Abstract

The invention relates to a connection device (100) for connecting a measuring device (119) to a connection pole of an energy store of a motor vehicle, comprising a connecting clamp (101) which is designed to surround the connection pole in a clamping manner, and a conducting element (103) comprising a first connection region (105) which is connected with the connecting clamp (101), and a second connection region (107) with which an electrical line can be electrically connected, wherein the conducting element (103) also comprises the following features: a conductive bridge (109) which electrically connects the first connection region (105) to the second connection region (107), a first bar (110) which extends from the first connection region (105), and a second bar (111) which extends from the second connection region (107), wherein the first bar (110) and the second bar (111) are formed by recesses (113) in the conductive bridge (109) and aligned with one another, wherein the first bar (110) and the second bar (111) form a connection terminal for connecting the measuring device (119), wherein the first bar (110) and the second bar (111) are each formed by a recess (113) and extend along a centre axis of the conductive bridge (109).

Description

Connecting device for connecting a measuring device to a terminal pole of an energy storage device of a motor vehicle

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 measuring resistance value 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, when 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 resistance is often in a defined range below the electrical circuit by a rejuvenation of the main current path, which bei- For example, is designed as a conductive bridge generated. 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. Document US 2015/0 192 622 Al describes an on ^¬ circuit device for connecting a measuring device to a terminal pole of an energy storage. In this case, the terminal pole of the battery is electrically conductively connected to an electrical line through a line plate. The conduit plate has a first and a second web. Both webs run at the edge of the conduit plate. The area of the wire plate, which runs alongside the two webs, forms a resistance element. The connection of the two webs with a measuring device allows the measurement of the voltage drop across the resistor element.

Likewise, the publication US 2014/0 320 150 AI discloses a connection device for connecting a measuring device to a terminal pole of an energy storage. In this case, the terminal pole of the battery is electrically conductively connected to an electrical line through a line plate. The conduit plate has a first and a second web. Again, both webs run on the edge of the conduit plate. The area of the wire plate, which runs alongside the two webs, forms a resistance element. The connection of the two webs with a measuring device allows the measurement of the voltage drop across the resistor element. 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 an on ^¬ closing device for connecting a measuring device to a terminal pole of an energy storage of a motor vehicle, with a terminal, which is designed to clamp the terminal pole clamped, and a line element, with a first connection area, which with 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 extends, and a second web, which extends from the second connection region, wherein the first web and the second web by

Recesses are formed in the conductive bridge and aligned with each other, wherein the first web and the second web form a connection terminal for connecting the measuring device. 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, for example, over the entire length of the detect the voltage applied to the conductive bridge, since the first bridge is connected to the first connection area and the second bridge is connected to the second connection area. Thus, the greatest possible resistance of the bridge can be made available for the voltage measurement. The first web and the second web are each formed by a recess and extend along a central axis of the conductive bridge. As a result, the technical advantage is achieved that the first web and the second web can be mechanically and electrically shielded from the surrounding conductive bridge. For example, the first web and the second web of the conductive bridge can be at least partially shielded from electromagnetic interference. 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

Be lead accumulator. Furthermore, the energy store can have a plus and a minus pole, to which a voltage of, for example, 12 V or 24 V can be present. In one embodiment, the first land, the second land, and the conductive bridge extend in substantially 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 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 formed as solder pins or press-in contacts for connection of the measuring device out ^¬. 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, wherein the further webs extend from the first connection region and / or the second connection region and run 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 Brü ^¬ ckenabschnitte on which an angle, in particular at an angle of 90 ° extend to each other, or the conductive bridge extends straight. 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 at connecting points in the case of multi-part line elements, 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 will be the technical Advantage achieved that the electrical line can be efficiently connected to the second port.

According to a second aspect, the invention relates to a measuring arrangement for detecting an electrical parameter of an energy store, wherein the measuring arrangement comprises the Anschlussvor ^¬ direction according to any one of the preceding claims and the measuring device, which is connected to the line element of the connecting device comprises. 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 storage ^¬ memory. 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 include 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 Tempe ^¬ temperature sensor element for detecting a temperature of the energy storage device and / or the connection device and / or the conductive bridge. Thus, the technical advantage it ^¬ ranges that can be found in the temperature of the conductive bridge and considered in the calculation of the current value from the falling to the conductive bridge voltage value. DESCRIPTION OF THE FIGURES

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

Fig. 1 is a schematic representation of a

circuit device, ·

2 is a schematic representation of a connection device;

3 is a schematic representation of a connection device; and

Fig. 4 is a schematic representation of a measuring arrangement.

DETAILED DESCRIPTION OF THE FIGURES

Fig. 1 shows a schematic representation of a connection ^¬ device 100 for connecting a measuring device 119 exemplified in Fig. 1 to a terminal post of a Energy storage of a motor vehicle according to a Ausfüh ^¬ tion form.

The connection device 100 for connecting the measuring device 119 to the connection pole of the energy accumulator of the motor vehicle comprises a connection terminal 101, which is designed to grip the connection pole, and a line element 103 with a first connection region 105, which is connected to the connection terminal 101, and a second terminal portion 107 to which an electric wire is electrically connectable, a conductive bridge 109 electrically connecting the first terminal portion 105 to the second terminal portion 107, a first land 110 extending from the first terminal portion 105, and a second land Stem 111, which extends from the second connection portion 107, wherein the first web 110 and the second web 111 formed by Aus ^¬ savings 113 in the conductive bridge 109 and aligned to ^¬ each other, wherein the first web 110 and the second web 111th a connection terminal for connecting the Me form 119. The first land 110 and the second land 111 extend along a center axis of the conductive bridge 109.

As a result of the arrangement of the first web 110 and of the second web 111 according to FIG. 1, the webs 110, 111 can be protected in a particularly efficient manner mechanically and electrically by the conductive bridge. In particular, the webs of the conductive bridge against electromagnetic interference can be shielded. According to one embodiment, the electrical resistance contributes to the total distance between the first connection region 105 and the second connection region 107 for generating an ohmic voltage drop. The detection of this resistive voltage clamping ^¬ trash can through the meter 119 to determine a Charging or discharging the energy storage, which can be done ^¬ example, also by the meter 119, are used. According to a further embodiment, the webs 110, 111 are aligned with each other, and the ends of the webs may be close together. Consequently, the contact points 115 on the webs 110, 111, to which the measuring device 119 is connected to the webs 110, 111, close together. Thus, the meter 119 may have compact dimensions, in particular the measuring instrument 119 may have a smaller cross sectional area than the at ^¬ circuit device 100 or the conductive bridge 109 have.

2 shows a schematic illustration of the connection device 100 according to an embodiment with a measuring device 119 shown by way of example, wherein the connection device 100 comprises two further webs 401, 403 which run parallel to the first web 110 and to the second web 111, respectively. According to one embodiment, the further webs 401, 403 are used for detecting a further measured variables by the measuring device, for example a constant or temporally variable reference current. In this manner, a compensation factor for a thermal Wi can derstandsänderung the conductive bridge are determined at 109 ^¬ play.

FIG. 3 shows a schematic illustration of the connection device 100 according to an embodiment with a measuring device 119 illustrated by way of example, wherein the conductive bridge 109 extends in a straight line.

Since the conductive bridge extends linearly in Fig. 3109, for example, safety distances between the Kon can ^¬ timing points 115 on the first web 110 and the second web 111, the terminal 101 and the electrical line are maintained. Furthermore, a bend or an angled course of the first web 110 and / or the second web 111 can be avoided, whereby the mechanical stability of the first web 110 and / or second web 111 can be increased.

4 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 connecting device 100 according to one of the aforementioned embodiments, and which is surrounded by a housing 601.

According to one embodiment, the housing 601 is a synthetic material housing ^¬, for example, an injection-molded housing or a metallic housing. The housing 601 may protect the meter 119 from mechanical and / or electromagnetic interference.

According to a further embodiment, the housing 601 surrounds the measuring device 119. According to a further embodiment, the housing 601 encloses the measuring device 119 and at least partially the conductive bridge 109.

According to a further embodiment, the mechanical stability of the conductive bridge 109 in the region of the measuring device 119 can be increased to protect the measuring device 119.

By way of example, the conductive bridge 109 may have an enlarged cross-sectional area in the region of the measuring device 119.

According to another embodiment, the measuring device 119 comprises a printed circuit board with an electrical circuit. The circuit board may for example be a one-sided or a double-sided printed circuit board, a multi-layer board, a fle ible ^¬ circuit board or a ceramic circuit board. According to a further embodiment, the measuring device 119 comprises a temperature sensor for detecting the temperature of the conductive bridge 109 to compensate for a temperature-conditional change of the resistance value of the conductive bridge 109 at the loading ^¬ calculation of the current from the voltage drop on the conductive bridge 109th

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

According to a further embodiment, the measuring device 119 comprises 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 footbridge

111 second bridge

113 recess

115 contact point

117 connection

119 measuring device

401 further footbridge

403 further footbridge

601 housing

Claims

1. Connection device (100) for connecting a measuring device (119) to a terminal pole of an energy storage device of a motor vehicle, comprising: a terminal (101), which is designed to grip the An ^¬ terminal pole by clamping; and a lead member (103) having a first terminal portion (105) connected to the terminal (101) and a second terminal portion (107) to which an electric wire is electrically connectable, the lead member (103) further following Features: a conductive bridge (109) electrically connecting the first terminal region (105) to the second terminal region (107); a first land (110) extending from the first

Terminal area (105) extends; and a second land (111) extending from the second land area (107); wherein the first land (110) and the second land (111) are formed by recesses (113) in the conductive bridge (109) and aligned with each other, the first land (110) and the second land (111) being a connection terminal for connection of the meter (119); characterized in that the first web (110) and the second web (111) each through a recess (113) are formed and extend along a central axis of the conductive bridge (109).

The terminal device (100) of claim 1, wherein the first land (110), the second land (111) and the conductive bridge (109) extend in the same plane.

3. Connecting device (100) according to one of the preceding claims, wherein the first web (110) at least one contact element for connecting the measuring device (119), and wherein the second web (111) at least one further contact element for connecting the measuring device ( 119).

4. Connection device (100) according to claim 3, wherein the contact elements as solder pins or press-fit to at ^¬ close the measuring device (119) are formed.

5. Connecting 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, wherein the further webs (401, 403) of the extend first connection region (105) or the second connection region (107) and extend parallel to the first web (110) or to the second web (111).

6. Connection device (100) according to any one of the preceding claims, wherein the conductive bridge (109) has bridge portions 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.

7. Connection device (100) according to one of the preceding claims, wherein the line element (103) is integrally formed ^¬ forms.

8. Connection device (100) according to one of the preceding claims, wherein the line element (103) is formed from a copper alloy ^¬ .

9. Connection device (100) according to one of the preceding claims, wherein the second connection region (107) has a connection (117) for connecting the electrical line by means of screw or crimp connection.

10. Measuring arrangement for detecting an electrical measured variable of an energy store, wherein the measuring arrangement comprises the on ^¬ closing device (100) according to any one of the preceding claims and the measuring device (119) which is connected to the line member (103) of the connecting device (100).

11. Measuring device according to claim 10, wherein the measuring arrangement comprises a circuit board having at least one sensor element, in particular ^¬ sondere a voltage sensor element.