Electrical connection tool ensuring optimum current flow by clamping the core of a wire to be connected

Abstract

The present invention relates to an electrical connection tool (10) ensuring current flow by clamping the core (12') of a wire (12) to be connected, the tool (10) comprising a body (18) extending along a first axis (X1) and provided with a conductive element (11), the body (18) having a first recess (19) for receiving the core (12'), the tool comprising means (13, 17) for clamping the wire (12), the first recess (19) defining a second axis (X2) oriented at an acute angle relative to the first axis (X1).

Description

[0001] DESCRIPTION

[0002] Title: Electrical connection tool ensuring optimum current flow by clamping the core of a wire to be connected

[0003] Technical field

[0004] The present invention relates to the field of industrial electrical tools.

[0005] The object of the present invention relates more particularly to a device making it possible to create a reliable, easily maintainable and compact electrical connection for high current levels, between an electrical wire and a conductive element.

[0006] By conductive element in the sense of the present invention, is meant here and throughout the following description a dedicated element for the conduction of an electric current, the precise design of which varies according to the type of connection to be made. The conductive element thus corresponds for example to an element of a power connector, in particular of a male or female electrical socket, or to an electrical conductor of a terminal block or a connection strip.

[0007] Furthermore, by high current within the meaning of the present invention, is meant here and throughout the description which follows a current suitable for industrial processes, for example a current suitable for testing battery cells, or any other operation, in particular a current approaching - at the date of the invention - 300 A.

[0008] Prior art

[0009] Several solutions are known in the prior art for making a high current electrical connection.

[0010] A first solution illustrated in [Fig.1] attached to this description consists of making the electrical connection using a 1 A terminal crimped onto the wire to be connected and held in position by a 2A clamping nut on the conductive element 3A.

[0011] One of the disadvantages of such a solution is that the 1 A terminal is crimped onto the wire to be connected.

[0012] To crimp this 1 A terminal, you must use a specific crimping tool for each available wire section.

[0013] In the event of a wire replacement, the on-site operator must be equipped with this pliers suitable for crimping the 1 A terminals onto the wire or have wires of suitable length and equipped with crimped terminals available. The Applicant notes that this considerably increases the number of references to be kept in stock for maintenance operations, which is not practical. One of the other disadvantages of this solution is that the IA terminal has a long rigid part to allow the wire to be crimped. This rigid part extends perpendicularly to the 3A conductive element. This rigid part can be a problem for reducing the space between two 3A conductive elements and different electrical potentials, since it becomes impossible to position two adjacent 3 A conductive elements according to the direction in which the IA terminal extends, without the IA terminal and / or the crimped wire colliding with an adjacent conductive element.

[0014] A second solution illustrated in [Fig.2] attached to this description consists of making the connection using a 2B system for axially tightening the core of the wire.

[0015] The 2B system is in the form of a hollow cylindrical part having two openings. The core of the 3B wire is inserted into a first opening, then the conductive element IB is inserted into the second opening and assembled with the 2B system, for example by screwing using an external thread of the conductive element IB and an internal thread of the 2B system. The end of the conductive element IB, for example a conical end, then clamps and deforms the core of the 3B wire against the internal wall of the 2B system.

[0016] One of the disadvantages of this system is that the connection between the conductive element IB and the wire 3B is necessarily coaxial. Such a design raises problems for routing large cross-section wires in a space reduced in depth because the wire must respect a minimum bending radius to maintain its integrity. In other words, the wire 3B extends coaxially to the conductive element IB, and can only be reoriented in other directions by respecting its minimum bending radius. This results in a significant bulk in length, defined by the bending radius of the wire 3B, in particular during high-current connections requiring large diameter wires, which are associated with large bending radii.

[0017] The Applicant observes that the solutions cited above make it possible to guarantee the passage of strong currents in relation to the section of the conductive element and that of the wire to be connected but pose problems of size and / or maintenance.

[0018] For these reasons, the Applicant submits that the solutions of the prior art are not fully satisfactory because they are not adapted to the existing environment and to the constraints of industrial operations for the passage of strong currents. Subject of the invention

[0019] The present invention aims to improve the situation described above.

[0020] One of the objectives of the present invention is to remedy the various drawbacks mentioned above by proposing the design of an electrical connection tool guaranteeing optimum current flow by simply tightening the core of the wire to be connected.

[0021] Another objective of the present invention is to propose an electrical connection tool adapted to the dimensional constraints of high current operations.

[0022] To this end, the subject of the present invention relates, according to a first aspect, to an electrical connection tool ensuring the passage of current by clamping a core of a wire, the tool comprising a body extending in a longitudinal direction defining a first axis, the body being provided with a conductive element, the body having a first housing sized for receiving the core of the wire, the tool further comprising means for clamping the wire with the body, the tool being configured to ensure the passage of current between the conductive element and the core of the wire when the core is received by the first housing.

[0023] It is understood here that the passage of current is carried out in such a way as to create the electrical connection between a wire and a conductive element, for example by placing the wire and the conductive element in direct contact, or even by means of constituent elements of the tool, for example by means of the body receiving the wire and the conductive element.

[0024] It is further understood that the integration of the conductive element into the connecting tool depends on the design of the conductive element, the conductive element being for example protruding from the body or defining a cavity of the body. Obviously, the body is provided with the conductive element so that the conductive element is accessible for its connection with an ancillary part, for example with a plug or a socket.

[0025] Advantageously, the first housing defines a second axis for receiving the core, the second axis being oriented at an acute angle relative to the first axis.

[0026] It is understood here that the second axis for receiving the core corresponds to the axis along which the wire is inserted and held in the first housing. The orientation of the second axis is thus defined by the structure of the first housing. The first housing has, for example, the shape of a cylindrical cavity, the second axis corresponding to the axis of revolution of the cavity.

[0027] For the purposes of the present invention, an acute angle is understood to mean here and throughout the following description a non-zero angle between the second axis and the first axis, the measurement of which in degrees is less than 90°. Obviously, such an acute angle is to be differentiated from a clearance or a design tolerance in a coaxial or perpendicular assembly. In other words, the wire is received by the electrical connection tool along a second axis that is non-coaxial and not perpendicular to the longitudinal direction of the connection tool, making it possible to at least partially reorient the wire with respect to the longitudinal direction as soon as it is assembled with the electrical connection tool. The direction of the wire is already at least partially adapted to a non-longitudinal configuration, and the length requirement resulting from the radius of curvature of the wire is reduced.Furthermore, extending the wire at a non-perpendicular angle allows a plurality of adjacent connecting tools to be arranged, for example in a grid shape and in particular within an electrical interface, without the wires colliding with the adjacent tools.

[0028] Thanks to the present invention, the electrical connection tool allows the design of electronic assemblies, for example connection interfaces, which minimize the space associated with wiring and are suitable for compact, non-longitudinal structures, using high currents.

[0029] In an advantageous embodiment of the present invention, the body defines two opposite longitudinal ends, the conductive element being disposed along a first longitudinal end and the first housing being disposed along a second longitudinal end.

[0030] It is understood here that the conductive element and the first housing are arranged on either side of the body along the first axis, in particular so as to ensure that the reception of the wire by the first housing does not hinder the accessibility of the conductive element. This design also makes it possible to facilitate the integration of the tool into a connection interface by arranging the tool so that the first axis is perpendicular to a plane of the connection interface, resulting in a conductive element accessible along a first face of the interface, the reception of the wire by the first housing taking place along a second opposite face of the interface. Obviously, the first housing being oriented along the second axis, it is understood here that this design is not restricted to a first housing forming the second longitudinal end but on the contrary to a first housing arranged along a portion of the body forming the second longitudinal end.

[0031] In a specific embodiment, the clamping means comprise a clamp associated with at least one screw.

[0032] It is understood here that the clamp corresponds to a substantially flat mechanical part associated with the body so as to clamp the core of the wire, the clamping being carried out by screwing the clamp against the body, the clamp taking the core in a vice with the body. Preferably, the body has a second housing opening into the first housing, the second housing being sized to receive the clamp.

[0033] It is understood here that the clamp is inserted into the second housing, after insertion of the wire into the first housing, so as to put the clamp directly in contact with the core of the wire for its tightening, without deforming the body during tightening.

[0034] In an additional embodiment, the tool further comprises a sleeve made of insulating material covering the body radially with respect to the first axis, the tool further comprising means for holding the sleeve in position along the first axis.

[0035] It is understood here that the socket forms an external insulating envelope of the tool, allowing its handling and / or its integration into a larger device without making false contact and without risk. In particular, the other elements of the tool, in particular the body, can be made of conductive materials allowing the passage of current between the wire and the conductive element, while controlling this passage of current.

[0036] Obviously, the sleeve is sized so as not to obstruct the first housing and to keep the conductive element accessible. The sleeve extends, for example, over a limited length in the longitudinal direction, so as to integrate the tool into a flat interface perpendicular to the longitudinal direction, while limiting the size of the tool. The position-holding means then make it possible both to hold the sleeve around the body and to hold the body longitudinally with respect to the interface.

[0037] Preferably, the socket comprises two portions configured to fit into each other by sliding along the first axis.

[0038] The person skilled in the art understands that this design makes it possible to assemble the connecting tool in an orifice with dimensions smaller than those of the socket, for example an orifice of an electrical interface, the two portions of the socket being positioned in a vice relative to the orifice to produce an insulating and stable assembly of the tool with the interface.

[0039] In an additional embodiment, the position holding means comprise at least one elastic ring arranged adjacent to the socket along the first axis.

[0040] It is understood here that the elastic ring blocks the longitudinal movement of the socket along the first axis, the elastic nature of the ring allowing the ring to be spread apart to be arranged around the body, the ring automatically tightening around the body once released and opposing any translation along the first axis. For example, a pair of elastic rings is provided arranged on either side of the socket so as to block any movement of the socket along the first axis. In a particular embodiment, the conductive element corresponds to a female connector.

[0041] It is understood here that the conductive element at least partially forms a port allowing the connection of a male plug or socket, so as to establish an electrical connection of the wire to the male socket via the connecting tool.

[0042] In yet another embodiment, the second axis is oriented at an angle of between 10° and 80° relative to the first axis.

[0043] Preferably, the second axis is oriented at an angle of between 30° and 60° relative to the first axis.

[0044] It is understood here that the choice of angle is made according to the design constraints, in particular the electrical equipment with which the connection tool is associated and the desired configuration of the internal or external wiring of the equipment. It is also understood that a lower angle makes it possible to limit the depth requirement, while a higher angle makes it possible to position two tools closer to each other without collision.

[0045] In another embodiment, the tool is sized to ensure the passage of a current of at least 300 A.

[0046] It is understood here that the tool is suitable for the passage of high currents, in particular that the tool is dimensioned jointly with the demand in terms of current circulation through industrial equipment, which corresponds at the date of the invention to a current of around 300A. The tool is for example capacitive for a value of up to 500A. It is further understood that the dimensioning of the tool includes in particular the dimensioning of the first housing, a high amperage being associated with a wire of greater diameter. The first housing is for example dimensioned so as to allow the insertion of a core of at least 70mm 2diameter, associated with a current of at least 300A, without causing crushing of the core. A second aspect of the present invention relates to an electrical connection interface, the interface comprising a first face and a second face, the interface comprising at least one electrical connection tool according to the first aspect of the invention, the first housing of the tool being arranged along the first face and the conductive element being arranged along the second face.

[0047] It is understood here that the connection interface corresponds to a part allowing one or more connectors to be arranged, generally a set of connectors, so that each connector is accessible and allows the reception of a dedicated plug or socket for establishing an electrical connection, the interface being associated with a device, the set of connectors allowing the power supply of the device or the power supply by the device or the transmission of data with the device. The connection tool is thus arranged so as to pass through the connection interface, so that the first housing and the conductive element are arranged along opposite faces of the connection interface.

[0048] The connection interface is for example arranged along a front of a device and makes it possible to make a connection between an internal portion of the device and an external portion of the device. In this design, the first housing of the tool is for example arranged along a first face in the internal portion of the device, the first housing receiving a wire of the internal wiring of the device. The orientation of the first housing along the second axis thus makes it possible to adapt the internal wiring device to the geometry of the device, and in particular to reduce its dimensional constraints.

[0049] In one embodiment, the first tool housing is free to rotate relative to the first axis.

[0050] The person skilled in the art understands that this design makes it possible to adapt the orientation of the first housing according to a cone defined by the rotation of the second axis according to the first axis. This design makes it possible to quickly adapt the position of the first housing, and therefore the orientation of the wire, according to the geometry sought for the installation of the interface. The rotation of the first housing corresponds, for example, to a rotation of the first housing with respect to the body, or to a rotation of the connecting tool with respect to the interface.

[0051] It is further understood that the minimum radius of curvature of the wire defines a cone of positions achievable by a wire of given length and diameter depending on the orientation of the second axis along which the wire is inserted into the first housing. The angle between the first axis and the second axis thus makes it possible on the one hand to shift the cone of positions, while a rotation of the first housing around the first axis, before or after assembly of the tool at the interface, makes it possible to define a plurality of cones of positions, greatly increasing, in accordance with the invention, the possibilities of geometry compatible with a wire clamped by the electrical connection tool.

[0052] A third aspect of the present invention relates to an electrical panel comprising at least one electrical connection interface according to the second aspect of the present invention. It is understood here that the electrical panel comprises one or more connection interfaces integrating at least one electrical connection tool. The electrical panel comprises for example a plurality of terminal blocks each comprising at least one electrical connection tool, and is for example integrated inside an electrical cabinet. A fourth aspect of the present invention relates to a test bench for a battery cell, the bench comprising at least one electrical connection interface according to the second aspect of the present invention.

[0053] A test bench here corresponds to a device configured for carrying out testing, forming, testing, production, control, aging, or end-of-life management phases of one or more electric battery cells. It is understood here that carrying out one or other of these phases requires the circulation of high currents so as to test the performance of the battery cell in real conditions, in particular for vehicle battery cells. The connection interface comprising the connection tool according to the first aspect of the invention can thus be integrated into a test bench, in particular within a production line, according to a compact design and adapted to large and large-diameter wiring.

[0054] Obviously, the electric tool and the electrical interface receiving the tool according to the invention can be integrated into a plurality of electrical devices, in particular industrial devices requiring the passage of high currents.

[0055] Thus, by the various functional and structural characteristics above, the Applicant proposes an electrical connection tool allowing the reception of the core of a wire so as to establish a current passage, the connection tool being adapted to its integration in compact designs by reorienting the wire so as to minimize the impact of its bending radius. The Applicant also proposes an electrical connection interface integrating such a connection tool, as well as a plurality of devices implementing the electrical connection interface.

[0056] Description of figures

[0057] Other characteristics and advantages of the present invention will emerge from the description below, with reference to the appended figures [Fig.3], [Fig.4], [Fig.5], [Fig.6] and [Fig. 7] which illustrate a plurality of exemplary embodiments which are devoid of any limiting character and in which:

[0058] [Fig. 3]

[0059] Figure 3 schematically represents a perspective view of two electrical connection tools receiving a wire according to an exemplary embodiment of the present invention;

[0060] [Fig. 4]

[0061] Figure 4 schematically represents a front view of a tool according to Figure 3;

[0062] [Fig. 5] Figure 5 shows an exploded view of a tool according to Figure 3;

[0063] [Fig- 6]

[0064] Figure 6 shows a first face of a first electrical connection interface receiving a plurality of tools according to Figure 3; and

[0065] [Fig- 7]

[0066] Figure 7 shows a second face of a second electrical connection interface receiving a plurality of tools according to Figure 3.

[0067] Detailed description

[0068] An electrical connection tool guaranteeing optimum current flow by simply tightening the core of the wire to be connected according to an exemplary embodiment of the present invention, as well as an electrical connection interface integrating such a tool, will now be described in what follows with joint reference to Figures 3 to 7.

[0069] As a reminder, one of the objectives of the present invention is to enable the reception of a wire by an electrical connection system in such a way as to:

[0070] - reduce the depth of the footprint; and

[0071] - keep the possibility of aligning several identical systems without them interfering with each other, as for example in a connector with several power channels.

[0072] This is made possible in the example described below.

[0073] According to the example of Figures 6 and 7, an electrical connection interface 100 is provided here, for example an interface 100 of an interconnection module configured to connect several industrial electrical devices. In this example, the connection interface 100 is configured to receive sixteen high-current connectors, sized for a current of 300A. The interface 100 thus receives sixteen electrical connection tools 10 according to the invention, each tool 10 forming a connector. Obviously, it is understood that the invention also applies to connection interfaces 100 of a variety of electrical devices, for example an electrical panel or even more generally an interface 100 of an industrial electrical appliance. According to the example of Figure 7, the interface 100 receives for example a set of contacts for low currents, juxtaposed with the sixteen tools 10.

[0074] According to this example, the interface 100 has a first face 101 and a second face 102 opposite the first face 101. The first face 101 corresponds for example, as illustrated in figure 7, to an internal face of the device concerned (here the interconnection module), and the second face 102 to an external face of the device. Thus, the interface 100 has for example according to its second face 102 sixteen female contacts capable of letting 300A pass continuously, and sixteen wires 12 according to its first face 101, each female contact corresponding to a tool 10 associated with a wire 12.

[0075] In this example, to pass such an intensity, each contact must be connected to a 70mm 12 wire 2 of section. A range adapted to different sections of wire 12 is envisaged in order to meet different current demands. It is understood here that the section of the wire 12 varies according to the current for which it is sized.

[0076] A problem that arises, in particular for a wire 12 of large cross-section, is the radius of curvature associated with the wire 12. Indeed, depending on the design of the interface 100 and the device in which it is integrated, the space available for the wire(s) 12 is restricted, in particular when the interface 100 is integrated into an industrial device, for example inside a production line, and when the wires 12 are used to connect non-coaxial elements.

[0077] In order to overcome this problem, an electrical connection tool 10 is provided to facilitate the integration of a wire 12 according to a restrictive geometry.

[0078] As illustrated in Figures 3 to 5, the electrical connection tool 10 according to the invention comprises a body 18 extending in a longitudinal direction defining a first axis XI, for example a body 18 of substantially cylindrical shape. The body 18 is advantageously provided with a conductive element 11. According to the example of Figure 5, the conductive element 11 is arranged inside the body 18 and also has a substantially cylindrical shape.

[0079] In particular, the conductive element 11 is integrated into the body 18 so as to be arranged along the second face 102 when the tool 10 is assembled on the interface 100, according to the example of FIG. 7. The conductive element 11 is for example arranged along a first longitudinal end of the body 18 and slightly protruding relative to the body 18, so as to extend from the tool 10 and to be accessible on the second face 102. Obviously, the exact shape of the conductive element 11 is designed according to the connection to be made, that is to say the type of connector expected on the tool 10 and / or on the interface 100. Here, the conductive element 11 thus at least partially forms a female contact, or female connector, for each of the sixteen tools 10 integrated into the interface 100.

[0080] In this same example, the body 18 also comprises a first housing 19 sized for receiving the core 12' of the wire 12, that is to say the conductive part of the wire 12, for example formed by a set of individual strands. The first housing 19 is for example arranged along a second longitudinal end of the body 18, opposite the first end, as illustrated in FIG. 5. Thus, according to the example of FIG. 6, the first housing 19 is arranged along the first face 101 of the interface 100, opposite the conductive element 11, so as to receive the 70mm wire 12. 2 , here according to the internal portion of the device receiving the interface 100.

[0081] In accordance with the underlying concept of the invention, the first housing 19 defines a second axis X2 for receiving the wire 12 oriented at an acute angle α relative to the first axis X1. In other words, the two axes X1, X2 define between them an angle α corresponding to the orientation of the first housing 19 relative to the longitudinal direction of the body 18. The orientation of the first housing 19, i.e. the second axis X2, is for example defined as the axis of revolution of the shape of the first housing 19. In particular, the second axis X2 corresponds to the axis of insertion of the core 12' of the wire 12 into the first housing 19.

[0082] Thus, as illustrated in Figures 3 to 7, the wire 12 extends directly from the tool 10 along the second axis X2, and requires less curvature to deform towards a direction not coaxial with XL

[0083] According to this concept, it becomes possible thanks to this angle a to reduce the depth of the space requirement by almost half for a wire section 12 and an equivalent current flow while respecting the minimum bending radius recommendations of the wires used. Obviously, the impact on the space requirement depends on the measurement of the angle a and the final geometry of the wire 12 and the layout of the interface 100. According to the example of figures 3 to 7, the angle a is substantially equal to 45°. According to other embodiments, an angle a of between 30° and 60°, or between 10° and 80°, is provided.

[0084] It is observed here that this electrical connection system via the tool 10 was chosen in order to optimize the volume in the rear part, that is to say inside, of the interconnection module. In other words, the reduced size of the wire 12 assembled with the tool 10 reduces the dimensional constraints of the device in which the interface 100 is integrated.

[0085] As illustrated in Figures 3 to 5, the tool 10 comprises means for holding the wire 12 in position when the core 12' is received in the first housing 19, more particularly means 13, 17 for clamping the wire 12 with the body 18. Here, the clamping means comprise two screws 13, for example screws of the ISO 4762 type, collaborating with a clamp 17 to clamp the wire 12. It is understood here that the selection of the screws 13 is carried out so as to limit the tooling to standard tools during assembly or maintenance operations on site, that is to say according to the equipment commonly used in the field of industrial electrical tools. This choice therefore represents a saving of time and money by limiting the number of references to be maintained and by facilitating the operations. Advantageously, the body 18 has a second housing 16, opening into the first housing 19 and sized to receive the clamp 17.Thus, when tightening the wire 12, the clamp 17 is arranged directly in contact with the core 12' through the second housing 16 and the tightening of the wire 12 corresponds to a vice-like positioning of the core 12' between the clamp 17 and the body 18 via the screws 13.

[0086] In the example of figures 6 and 7, according to the first face 101 of the interface 100, that is to say inside the interconnection module receiving the interface 100, the assembly of the wire 12 with the interface 100 corresponds to a positioning of the wire 12 of 70 mm 2 in the first dedicated housing 19. The wire 12 is then held by screwing the clamp 17 also dedicated for this section. It is further understood that the choice of the screws 13 is preferably made taking into account a screwing of the clamps 17 of each tool 10 of the interface 100, without collision with an adjacent tool 10.

[0087] Optionally, the tool 10 also comprises a sleeve 15 which radially covers the body along the first axis XL. According to the example of FIGS. 3 and 4, the sleeve 15 is thus arranged so as to surround the cylindrical body 18, while releasing the conductive element 11 and the first housing 19. The sleeve 15 is advantageously made of an electrically insulating material, that is to say it allows the assembly of the tool 10 to other elements, in particular to the interface 100, without establishing electrical contact.

[0088] In order to allow simple assembly, a sleeve 15 is provided, as illustrated in Figure 5, made of two complementary portions, fitting into each other by sliding along the first axis XL. The sleeve 15 is then held in position around the body 18 via two elastic rings 14, arranged on either side of the sleeve 15 and tightened on the body 18 so as to avoid translation along the first axis XL.

[0089] In this example, and as illustrated in Figures 6 and 7, the assembly of the tool 10 on the interface 100, which corresponds for example to an aluminum plate, corresponds to a mounting of the body 18 through an orifice of the interface 100, the two portions of the insulating sleeve 15 being arranged on either side of the interface 100, that is to say with a first portion arranged along the first face 101 and a second portion arranged along the second face 102, then fitted into each other so as to form the sleeve 15. The elastic rings 14 are then arranged around the sleeve 15, so as to prevent any movement of the sleeve 15 relative to the body 18, and by extension any movement of the tool 10 relative to the interface 100.

[0090] Optionally, the tool 10 is assembled to the interface 100 so as to allow rotation of the first housing 19 relative to the first axis XL. Depending on the design, the rotation of the first housing 19 corresponds to a rotation of the tool 10 relative to the interface 100, to a rotation of the first housing 19 relative to the body 18, or even to a rotation of the body 18 relative to the sleeve 15. This design then makes it possible to drive rotation of the second axis X2 relative to the first axis XI, and therefore to partially control the orientation of the second axis X2, in particular so as to orient the wire 12 in the desired direction. This design thus makes it possible to expand the set of positions achievable by a given wire 12 assembled with the tool 10, in particular in comparison with a coaxial clamping system of the prior art.

[0091] Thus, the present invention relates to an electrical connection tool, as well as to a connection interface integrating such a tool, making it possible to make high-current non-coaxial electrical connections, and thus compatible with the wiring of industrial electrical devices of reduced dimensions without hindrance generated by the bending radius of the electrical wires.

[0092] It should be noted that this detailed description relates to several particular examples of embodiments of the present invention, but that in no case does this description have any limiting character with respect to the subject of the invention; on the contrary, its objective is to remove any possible imprecision or any misinterpretation of the claims which follow.

Claims

DEMANDS 1. An electrical connection tool (10) ensuring the passage of current by clamping a core (12') of a wire (12), said tool (10) comprising a body (18) extending along a longitudinal direction defining a first axis (XI), said body (18) being provided with a conductive element (11), said body (18) having a first housing (19) dimensioned for receiving said core (12') of said wire (12), said tool (10) further comprising clamping means (13, 17) for clamping said wire (12) with said body (18), said tool (10) being configured to ensure said passage of current between said conductive element (11) and said core (12') of said wire (12) when said core (12') is received by said first housing (19), characterized in that said first housing (19) defines a second axis (X2) for receiving said core (12'), said second axis (X2) being oriented at an acute angle (a) with respect to said first axis (XI).

2. Tool (10) according to claim 1, in which said body (18) defines two opposite longitudinal ends, said conducting element (11) being arranged along a first longitudinal end and said first housing (19) being arranged along a second longitudinal end.

3. Tool (10) according to claim 1 or 2, wherein said clamping means (13, 17) comprise a clamp (17) associated with at least one screw (13).

4. Tool (10) according to claim 3, wherein said body (18) has a second housing (16) opening into said first housing (19), said second housing (16) being dimensioned for receiving said clamp (17).

5. Tool (10) according to one of claims 1 to 4, which further comprises a sleeve (15) made of insulating material covering said body (18) radially with respect to said first axis (XI), said tool (10) further comprising means for holding said sleeve (15) in position along said first axis (XI).

6. Tool (10) according to claim 5, in which said sleeve (15) has two portions configured to fit one into the other by sliding along said first axis (XI).

7. Tool (10) according to claim 5 or 6, wherein said means for holding in position comprise at least one elastic ring (14) disposed adjacent to said sleeve (15) along said first axis (XI).

8. Tool (10) according to one of claims 1 to 7, wherein said conductive element (11) corresponds to a female connector.

9. Tool (10) according to any one of claims 1 to 8, wherein said second axis (X2) is oriented at an angle (a) between 10° and 80° with respect to said first axis (XI).

10. Tool (10) according to claim 9, wherein said second axis (X2) is oriented at an angle (a) between 30° and 60° with respect to said first axis (XI).

11. Tool (10) according to any one of claims 1 to 10, which is dimensioned to ensure said passage of a current of at least 300 A.

12. Electrical connection interface (100), said interface (100) comprising a first face (101) and a second face (102), said interface (100) comprising at least one electrical connection tool (10) according to any one of claims 1 to 11, said first housing (19) of said tool (10) being arranged along said first face (101) and said conductive element (11) being arranged along said second face (102).

13. Interface (100) according to claim 12, wherein said first housing (19) of said tool (10) is free to rotate with respect to said first axis (XI).

14. Electrical panel comprising at least one (100) electrical connection interface according to claim 12 or 13.

15. Battery cell test bench, said bench comprising at least one (100) electrical connection interface according to claim 12 or 13.

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