WO2018138132A1

WO2018138132A1 - Force-balance current sensor

Info

Publication number: WO2018138132A1
Application number: PCT/EP2018/051702
Authority: WO
Inventors: Christine Spörl; Daniel Jungtäubl; Henryk Frenzel
Original assignee: Continental Automotive Gmbh
Priority date: 2017-01-25
Filing date: 2018-01-24
Publication date: 2018-08-02

Abstract

The invention relates to a current sensor (1), comprising: a pole terminal (2) having a ring section (3) for contacting a vehicle battery pole; an electrical resistor element (5) which is connected in series between the pole terminal (2) and a connection element (6) for an electrical cable; a signal processing circuit; and a housing (7), wherein the housing (7) at least partially surrounds the electrical resistor element (5) and/or the signal processing circuit, in particular completely surrounding the signal processing circuit and partially surrounding the electrical resistor element (5), characterised in that the housing (7) has a first securing element (10) and the pole terminal (2) has a second securing element (20), which are and/or can be interlockingly connected to one another.

Description

Power-relieved current sensor

The present invention relates to a current sensor according to the preamble of claim 1 and a pole terminal according to the preamble of claim 15.

According to the prior battery pole enable electrical conductive contact with the terminal of a battery, in particular ^¬ sondere a vehicle battery.

For example, the document EP 2713444 AI with a battery terminal in punch-bend design with

90 ° fitting. In this pole terminal, a screw is arranged parallel to the axis of the battery pole. When tightening the screw a translationally moving wedge closes the

Pole terminal and attaches this at the battery pole. When the screw is loosened, the wedge in the opposite, translationally moving wedge opens the terminal again. According to the prior art, a current sensor is connected and / or fixed in series between the pole terminal and a connection element for an electrical cable. When mounting the electric cable, torques and other forces act. Furthermore, in regular vehicle operation, larger forces also act due to the relatively heavy cable and the vibrations occurring during vehicle operation.

Furthermore, the current sensor of the current sensor according to the prior art has an electrical contact, for example a brazing point, with the connection element and the pole terminal.

According to the prior art, these brazed joints are supported by a fastening element which is clipped to the pole terminal and the connection element. As a result, a movement of the connecting element due to the acting torques Screwing on the ground cable prevents. However, such fastening ^¬ elements for clipping require an additional component.

The object of the invention is a current sensor for improving the stability and / or the robustness and / or the

To propose force / torque relief, which is inexpensive to manufacture. Furthermore, it is the object of the invention to propose a corresponding pole terminal. This object is achieved by a

Current sensor according to claim 1 and a pole terminal according to claim 15. Advantageous embodiments can be taken for example from the dependent claims. The content of the claims is made by express reference to the content of the description.

Alternatively, the invention preferably relates to a

Current sensor, which comprises a pole terminal, which has a ring portion or ring for the electrical and non-positive contacting of a Fahrzeugbatteriepols. The pole ^¬ terminal case has a clamping device which is constructed and cooperates with the ring portion such that the inner diameter of the ring portion is variable. In this case, the current sensor comprises an electrical resistance element which is connected in series between the pole terminal and a

Connection element for an electrical cable is connected. In this case, the current sensor comprises a signal processing circuit and a housing which encloses and / or embeds the electrical resistance element and / or the signal processing circuit at least partially, in particular completely. The housing preferably has a first pocket Be ^¬ fastening element and at the terminal post, a pin is provided as a second fastening element is configured such that the pin and the bag are positively connectable and / or connected.

Preferably, the housing encloses the signal processing circuit ^¬ complete and the electrical resistance element partially. Preferably, a pocket is formed on the housing.

Under bag is preferably a recess and / or cavity to understand, which in particular arranged on the housing or

is formed or recessed in the housing.

Preferably, the pin is understood to mean a pin and / or a web and / or a finger and / or a tab. Preferably, the pole terminal is a punch-bending pole terminal.

Preferably, the pole terminal is a forged pole terminal.

Alternatively, preferably, the invention also relates to a current sensor, which is designed such that it comprises a pocket having pole terminal and a pin formed on the housing, as the first and second fastening element.

Preferably, the pole terminal is for holding an electric cable to a pole of a vehicle battery.

The term current sensor is preferably a

Current sensor arrangement understood. Conveniently, the ring portion or ring is conical.

The electrical resistance element is preferably formed as a shunt or as a power resistor and, in particular with the terminal post and the connecting element in one piece, especially be ^¬ vorzugt monolithically integrally connected.

It is preferred that the form-fitting connection acts in a first form-locking direction and counter to the first shape-closing direction.

It is preferred that the positive connection in a second positive locking direction and / or against the second Positive locking direction acts, wherein the first positive locking direction and the second positive locking direction are aligned orthogonal to each other. It is preferred that the positive connection acts in a third positive locking direction, wherein the first form ^¬ closing direction, the second positive locking direction, and the third positive locking direction are aligned orthogonal to each other. It is preferred that the pin has at least one, in particular two, tapers.

It is preferable that the pin is formed directly on the ring portion.

It is preferred that the pin projects from an upper edge of the ring ^¬ section substantially vertically upwards.

It is preferable that the pin of an outer circumferential surface of the ring portion, in particular, curved or bent out ^¬ forms, projecting essentially vertically upwards or sideways.

It is preferred that the pin and the ring portion are integrally formed, in particular welded in one piece or punched in one piece. Particularly preferably, the pin and the ring portion are formed monolithically in one piece.

It is preferred that on the pin, a latching element and on the pocket a locking counter-element are formed such that the pin can be latched and / or engaged in the pocket.

It is preferred that the pocket is formed on an outer side of the housing. It is preferred that the pocket has an opening at an upper side and / or at a lower side.

It is preferable that a front side of the pocket having an off ^¬ recess, in particular in a lower portion of a Having trapezoidal recess, and / or at least one lateral side has a recess.

It is preferred that the housing and the pocket are integrally formed.

It is preferred that the pin and / or the pocket are clamp-shaped. The pocket is preferably formed so that it has a more ^¬ stage recess which is part of the opening at the bottom. Particularly preferably, at least one of the recess steps has a trapezoidal shape. The invention also relates to a pole terminal. The pole terminal has a ring portion for the electrical and non-positive contacting of a Fahrzeugbatteriepols. The pole terminal has a clamping device. The clamping device is designed in such a way and cooperates with the ring section such that the inner diameter of the ring section is variable. At the pole terminal, in particular directly to the ring portion, a pin is formed such that the pin with a pocket is form- ^fitting connectable. Preferably, the pole terminal is for holding an electric cable to a pole of a vehicle battery.

The invention also relates to the use of the current sensor in motor vehicles.

The current sensor preferably has means for measuring a voltage.

The current sensor preferably comprises an electronic Steue ^¬ approximately device which is configured to execute a drive ^¬ Ver. The electronic control device may in particular comprise processor means and memory means, wherein program code is stored in the memory means, in the execution of which the processor means execute a method according to the invention or behave accordingly.

The current sensor is expediently designed such that the signal processing circuit picks up or detects a voltage across the electrical resistance element and calculates therefrom a current or current value and at an output of the

Current sensor provides a corresponding current sensor output signal.

Some particularly advantageous embodiments of the invention are specified in the subclaims. Further preferred embodiments will become apparent from the following description of exemplary embodiments with reference to figures.

In a schematic representation show:

1 shows an embodiment of a current sensor,

Fig. 2 shows an embodiment of a housing, Fig. 3 shows an embodiment of a pole terminal, and

4 shows an embodiment of an embodiment of a pin on a ring section.

FIG. 1 shows an exemplary embodiment of a current sensor 1 according to the invention.

The current sensor 1 has a pole terminal 2. The pole terminal has a ring section 3 for the electrical and non-positive contacting of a battery terminal. The pole terminal 2 has a clamping device 4. The clamping device 4 and the ring portion 3 are formed and act together in such a way that the inner diameter of the ring portion is changeable. The ring portion 3 is conical in the axial direction. At the upper edge 9, the ring portion 3 has a smaller inner diameter than at the lower edge. The clamping device 4 has a screw and a nut. The screw acts in particular as a clamping element. During a screwing operation in the closing direction, the clamping element is pulled in the vertical direction, in particular upwards, to the upper edge 9 of the annular section 3. As a result, forwardly protruding portions of the ring portion 3 are compressed, whereby the inner ^¬ diameter of the ring portion 3 is reduced.

The current sensor 1 has an electrical resistance element 5. The electrical resistance element 5 is connected in series between the pole terminal 2 and a connection element 6 for an electric cable. The current sensor 1 has a signal processing circuit. The electrical resistance element 5 and the signal processing circuit are at least partially enclosed by a housing 7. Furthermore, the current sensor has a plug 8. By means of the plug 8, for example, data can be received and / or transmitted via a data interface.

The housing 7 has a first fastening element 10 designed as a pocket. The bag 10 is in particular a hollow body. The pocket has on a front side a tra ^¬ pezförmige recess 11. Furthermore, the bag has an opening 13,14 on an upper side and on a lower side. In particular, the opening 14 on the underside is larger than the opening on the upper side 13. In the opening on the underside 14 of the pin 20 can be inserted. In addition, the pocket has a recess 12 on a lateral side.

At the pole terminal 2, a second fastening element 20 designed as a pin is formed directly on the upper edge 9 of the ring section 3. The pin 20 projects vertically from the top edge. The pin 20 has a first taper 21 and a second one Rejuvenation 22 on. Furthermore, the pin 20 is trapezoidal.

In the connected state, the pin 20 and the pocket 10 has a positive connection in a first positive locking direction 40 and against the first positive locking direction 41, in a second positive locking direction 42 and against the second positive locking direction 43, and in a third positive locking direction 44 on. Fig. 2 and Fig. 3 shows the housing 7 and the pole terminal 2 of the current sensor 1 isolated.

4 shows the ring section 3 of a pole terminal 2. The pin 20 projects vertically upward from the outer circumferential surface of the ring section 3. The pin 20 may be formed on a lower edge, an upper edge or between the upper edge and lower edge of the ring portion 3.

If, in the course of the procedure, it turns out that a feature or a group of features is not absolutely necessary, it is already desired on the applicant side to formulate at least one independent claim which no longer has the feature or the group of features. This may, for example, be a subcombination of a claim present on the date of the application or a further one by another

Characteristics of a restricted sub-combination of a claim at the filing date. Such newly formulated claims or feature combinations are to be understood as covered by the disclosure of this application.

It should also be noted that embodiments, features and variants of the invention, which are described in the various embodiments or embodiments and / or shown in the figures, can be combined with each other as desired. Single or multiple features are arbitrarily interchangeable. Resulting combinations of features are to be understood as covered by the disclosure of this application. Recoveries in dependent claims are not to be understood as a waiver of obtaining independent, objective protection for the features of the dependent claims. These features can also be combined as desired with other features.

Features that are disclosed only in the specification or features that are disclosed in the specification or in a claim only in conjunction with other features may, in principle, be of independent significance to the invention. They can therefore also be included individually in claims to distinguish them from the prior art.

Claims

Current sensor (1), comprising:

a pole terminal (2) having a ring portion (3) for contacting a vehicle battery terminal,

- An electrical resistance element (5) which is connected in series between the pole terminal (2) and a connection element (6) for an electric cable;

a signal processing circuit; and

- A housing (7), wherein the housing (7) the electrical resistance element (5) and / or the signal processing ^¬ circuit at least partially, in particular the signal ^¬ processing circuit completely and the electrical resistance element (5) partially surrounds, characterized in that

the housing (7) has a first fastening element (10) and the pole terminal (2) has a second fastening element (20) which can be positively connected to one another and / or connected to one another.

Current sensor (1) according to claim 1, characterized in that the first fastening element (10) is formed as a pocket ^¬ and the second fastening element (20) is designed as a pin and the pin is inserted or plugged into the pocket.

Current sensor (1) according to claim 1 or 2, characterized in that the positive connection in a first positive locking direction (40) and counter to the first positive locking direction (41) acts.

Current sensor (1) according to claim 3, characterized in that the positive connection in a second form ^¬ closing direction (42) and / or counter to the second positive locking direction (43) acts, the first positive ^{locking ¬} direction (40) and the second positive ^locking direction ( 42) are aligned orthogonal to each other. Current sensor (1) according to at least one of the preceding claims, characterized in that the pin (20) we ^¬ nigstens has one, in particular two, tapers (21, 22).

Current sensor (1) according to at least one of the preceding claims, characterized in that the pin (20) is formed directly on the ring portion (3).

Current sensor (1) according to at least one of the preceding claims, characterized in that the pin (20) from a top edge (9) of the ring portion (3) protrudes substantially vertically upwards.

Current sensor (1) according to at least one of claims 1 to 6, characterized in that the pin (20) from an outer circumferential surface of the ring portion (3), in particular ge ^¬ curved or bent, substantially vertically upwardly or laterally protrudes.

Current sensor (1) according to at least one of the preceding claims, characterized in that the pin (20) and the ring portion (3) are integrally formed, in particular welded in one piece or punched in one piece.

Current sensor (1) according to at least one of the preceding claims, characterized in that on the pin (20) a locking element and on the pocket (10) a locking counter-element are formed such that the pin (20) in the pocket (10) can be latched and / or engaged.

Current sensor (1) according to at least one of the preceding claims, characterized in that the pocket (10) is formed on an outer side of the housing (7).

Current sensor (1) according to at least one of the preceding claims, characterized in that the bag (10) on an upper side and / or on a lower side an opening (13,14).

13. Current sensor (1) according to at least one of the preceding claims, characterized in that a front side of the pocket (10) has a recess (11), in particular in a lower portion of a trapezoidal recess (11), and / or at least one lateral Side has a recess (12).

14. Current sensor (1) according to at least one of the preceding claims, characterized in that the pin (20) and / or the pocket (10) are clamp-shaped.

15. Pole clamp (2), comprising:

a ring portion (3) for the electrical and force ^¬ conclusive contacting a Fahrzeugbatteriepols, and a clamping device (4) which is formed and cooperates with the ring portion (3), that the inner ^¬ diameter of the ring portion (3) is variable;

characterized in that

on the pole terminal (2), in particular directly on the Ringab ^{¬ section} (3), a pin (20) is designed such that the pin (20) with a pocket (10) is positively connected.