WO2019122289A1

WO2019122289A1 - Electrical connection bar

Info

Publication number: WO2019122289A1
Application number: PCT/EP2018/086479
Authority: WO
Inventors: Anthony LAMARCHE; Olivier Gilet
Original assignee: Valeo Siemens Eautomotive France Sas
Priority date: 2017-12-22
Filing date: 2018-12-21
Publication date: 2019-06-27
Also published as: FR3076100B1; FR3076100A1

Abstract

The subject matter of the invention is an electrical connection bar (115) configured to make an electrical connection between a first electrical device and a second electrical device. The electrical connection bar (115) comprises at least one electrical conductor (130) comprising a first end, called a link end (130B), intended to be connected to a connection terminal of the first electrical device (10) and a second end, called a connecting end (130A), intended to be connected to a connection terminal of the second electrical device (20), and a support (120) made of electrically insulating material on which said electrical conductor (130) is mounted, the electrical conductor (130) being translatably movable relative to said support (120).

Description

ELECTRICAL CONNECTION BAR

TECHNICAL FIELD AND OBJECT OF THE INVENTION

The present invention relates to an electrical connection bar for connecting two electrical equipment between them. The present invention also relates to an electrical assembly comprising such an electrical connection bar, in particular for an electric or hybrid vehicle, and to a method of electrical connection between two devices using the electrical connection bar according to the invention.

The invention aims in particular to make it possible to easily and quickly achieve the electrical connection of a first electrical equipment, such as an electrical machine embedded in an electric or hybrid vehicle, with a second electrical equipment, such as an inverter .

STATE OF THE ART

As is known, an electric or hybrid motor vehicle comprises an electric drive system powered by a high voltage power supply battery via a high voltage on-board electrical network and a plurality of auxiliary electrical equipment powered by a battery of electric power. low voltage supply via a low voltage on-board electrical network. The high voltage power supply battery provides a power supply function of the electric drive system for propelling the vehicle. More specifically, in order to control the electric motor driving the wheels of the vehicle, it is known to use an inverter for converting the direct current supplied by the high voltage power supply battery into one or more alternating control currents, for example sinusoidal currents. .

In a known solution, the inverter is in the form of a housing in which are mounted at least one electronic power component, through which passes the power supply to the electric motor, and an electronic control unit. The electronic control unit comprises electronic components for controlling the electronic power component (s).

In the case of a three-phase motor, the motor comprises three electrical connection terminals, called "phase terminals", and the inverter comprises three electrical connection terminals, connected to the phase terminals of the motor to control said motor using three so-called "phase" currents out of phase two by two, for example 120 °. These phase currents are generated by the inverter from the current delivered by the high voltage battery. To do this, the inverter comprises a first electrical conductor, called "positive conductor", adapted to be connected to the positive potential of the high voltage power supply battery, and a second electrical conductor, called "negative driver", adapted to be connected to the negative potential of the high voltage power supply battery.

The electronic control unit controls the electronic power component or components so that it performs the conversion of the direct current received from the high voltage battery, transforming a DC voltage between the positive conductor and the negative conductor, into three currents. Alternate phase motor control. For this purpose, the electronic control unit is in the form of an electronic card on which are mounted electronic components connected by electric tracks and for controlling the electronic power component so that it delivers the control currents. to the electric motor.

During the manufacture of the vehicle or the maintenance of the inverter, the electric motor having been previously mounted in the vehicle, the inverter is placed near the engine by an operator so that each connection terminal of the Inverter is next to the corresponding phase terminal of the motor to connect them in pairs with a screw system. In order to ensure an efficient electrical connection, it is necessary that each connection terminal is pressed against the corresponding phase terminal. In known manner, a connection terminal and a phase terminal are each in the form of a metal element having a free end in which is formed a circular orifice, the two free ends to be pressed against each other to allow an efficient passage of the current and the two circular holes to be aligned to allow the passage of the screw for fixing the phase terminal on the connection terminal.

However, in some cases, the lack of space does not allow the operator to manipulate the phase terminals to position against the connection terminals. In this case, the mounting operator grasps the inverter by the face opposite to the face having the connection terminals, places the inverter near the motor so that the connection terminals are substantially opposite the phase terminals of the motor. then, via a trapdoor mounted on one side of the inverter housing, secures the connection terminals to the phase terminals with screws and a long handled screwdriver. The positioning of the connection terminals of the inverter against the phase terminals of the motor can thus prove to be significantly complex and tedious, which presents a significant disadvantage. In addition, in the case where the phase terminals are fixed on the body of the electric motor, due to dispersions in the dimensions of the inverter or the electric motor, the connection terminals of the inverter and the phase terminals of the engine may not be facing each other for a connection as described above. The chances of this happening are increased when there are several pairs of terminal / phase terminal to pair in the same operation. There is therefore the need for a simple, reliable and effective solution to quickly and correctly position the connection terminals of an inverter with respect to the phase terminals of a vehicle electric motor during assembly of said inverter on said engine.

GENERAL PRESENTATION OF THE INVENTION

For this purpose, the invention firstly relates to an electrical connection bar configured to make an electrical connection between a first electrical equipment and a second electrical equipment, said electrical connection bar comprising:

at least one electrical conductor having a first end, referred to as a connection end, intended to be connected to a connection terminal of the first electrical equipment and a second end, called a connection end, intended to be connected to a connection terminal of the second electrical equipment,

- A support electrically insulating material in which is mounted said electrical conductor, said electrical conductor being movable in translation relative to said support.

Thus, the electrical conductor being movably mounted in translation relative to the support, it is easy to position the second electrical equipment with respect to the first electrical equipment, which allows a quick and easy assembly of the assembly, including in a small and difficult to access place for an operator, especially in a motor vehicle. With the connection bar according to the invention, it is no longer necessary for the operator to manually and fastidiously position the connection terminal or terminals of the second electrical equipment with respect to the connection terminal or terminals of the first electrical equipment before fix them.

In one embodiment, the electrical conductor is configured to slide in or on a sliding member formed in the support, which makes the translation of the electrical conductor simple and fast.

Advantageously, the sliding member comprises at least one groove extending in a first direction and receiving a portion of the electrical conductor so as to guide the driver in translation along said first direction.

Advantageously, said groove has a width greater than that of the portion of the electrical conductor received in the groove, so as to allow a translation of the electrical conductor in a second transverse direction, especially perpendicular to the first direction, which allows the electrical conductor to be adjusted transversely with respect to the connection terminal (s) of the second electrical equipment. According to one aspect of the invention, the electrical conductor is in the form of an L-shaped lamella of which:

one of the two parts of the L, called the connecting part, is mounted in or on the support so as to be able to move in translation in said support, and comprises a connection end intended to be connected to the connection terminal of the first electrical equipment, and

the other part of the L, called the connection part, comprises a connection end intended to be connected to the connection terminal of the second electrical equipment.

In one embodiment, the support comprises a first part and a second part nested one inside the other so as to maintain at least partly the electrical conductor, the first part of the support being intended to be integral with the first electrical equipment, which makes it easy to build and assemble.

Preferably, the electrical connection bar comprises a plurality of said electrical conductor mounted in the support and configured to connect respective connection terminals of the first and second electrical equipment.

Preferably, the support forms a bar extending in a main direction, said electrical conductors being aligned along said main direction.

The invention also relates to an electrical assembly, in particular for an electric or hybrid vehicle, comprising a first electrical equipment and a second electrical equipment, each of said equipment comprising at least one connection terminal, said assembly being remarkable in that it comprises an electrical connection bar, as presented above, connecting the connection terminals of the first and second electrical equipment.

In one embodiment, the first electrical equipment is an electrical machine and the second electrical equipment is an inverter.

Preferably, the connection terminal of the first electrical equipment is formed in an electrical conductor, preferably deformable, the support of said electrical connection bar is secured to the first electrical equipment and said second equipment comprises at least one electrical device. guide adapted to, when mounting the connecting end of the electrical conductor of the connection bar on the terminal of the second equipment, cooperate with the sliding of the electrical conductor in the support for guiding the connection end on the terminal connecting the second equipment.

Preferably, the guide member comprises a chamfered portion, which is a simple and effective way of guiding the electrical conductor. Advantageously, the chamfered portion has a slope less than 45 ° to easily guide the electrical conductor.

In one embodiment, the chamfered portion has a slope less than 30 ° to guide even more easily the electrical conductor.

In a preferred embodiment, the first electrical equipment is an electrical machine, in particular for driving a motor vehicle, and the second electrical equipment is an inverter for supplying said electric machine from a power source. electric.

The invention also relates to a method of electrical connection between a first and a second electrical equipment, said first equipment comprising at least one electrical connection terminal formed in an electrical conductor, preferably deformable, said second electrical equipment comprising at least a connection terminal and at least one guide member, and the support of an electrical connection bar, as presented above, being integral with the first electrical equipment, said method being remarkable in that it comprises the steps of:

fastening the connecting end of the electrical conductor of the connection bar to the connection terminal of the first electrical equipment,

placing the connection terminal of the second electrical equipment opposite the connecting end of the electrical conductor of the connection bar,

mounting the connection end of the electrical conductor of the connection bar to the terminal of the second equipment by bringing the first and second electrical equipment together, so that when the connection end comes into contact with the guide member, last cooperates with the translation of the electrical conductor in the support of the electrical connection bar to guide the connection end to the connection terminal of the second equipment,

attaching the connecting end to the connection terminal of the second equipment.

PRESENTATION OF FIGURES

The invention will be better understood on reading the description which follows, given solely by way of example, and with reference to the appended drawings given by way of non-limiting examples, in which identical references are given to similar objects and in which: Figure 1 is a perspective view of an embodiment of an electric machine according to the invention; Figure 2 is a partial partial view of the electric machine of Figure 1 on which is mounted an embodiment of the electrical connection bar according to the invention;

Fig. 3 is a perspective view of the electrical connection bar shown in Fig. 2;

Fig. 4 is another perspective view of the electrical connection bar shown in Fig. 2;

Figure 5 is a perspective view of an embodiment of an electrical conductor of the electrical connection bar of Figures 3 and 4;

Figure 6 is a partial perspective view of the electrical connection bar of Figures 3 and 4;

Figure 7 is a perspective view of an embodiment of an inverter according to the invention showing its front face of connection to the electric machine of Figure 1; Figure 8 is a perspective view of an electronic power module of the inverter of Figure 3;

Figure 9 is a perspective view of the insulating connection bar of the power electronics module of Figure 4;

FIG. 10 illustrates an embodiment of the method according to the invention;

Figure 1 1 is a sectional view illustrating an example of positioning a connection terminal with respect to a phase conductor before assembly;

Fig. 12 is a sectional view illustrating the connection terminal and the phase conductor of Fig. 11 as they are inserted relative to each other;

Figure 13 is a sectional view illustrating the connection terminal and the phase conductor of Figure 11 in the use position;

Figure 14 is a sectional view illustrating the connection terminal fixed by screwing on the phase conductor of Figure 1 1.

It should be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate.

DETAILED DESCRIPTION OF THE INVENTION

In the description to be made hereinafter, the invention will be described in its application to an electric or hybrid motor vehicle without this being limiting to the scope of the present invention. In the example described below, the vehicle comprises a first electrical equipment, a second electrical equipment. In this preferred example, the first electrical equipment is in the form of an inverter and the second electrical equipment is in the form of an electric machine, but this does not limit the scope of the present invention. It will be noted that the electrical equipment could be something else, for example a charger or a DCDC converter or a high voltage battery embedded in the vehicle.

The vehicle comprises in particular a high voltage power supply battery, a high voltage on-board electrical network, a low voltage power supply battery, a low voltage on-board electrical network and a plurality of auxiliary electrical equipment. The low voltage on-board electrical network connects the low-voltage battery and the plurality of auxiliary electrical equipment so that the low-voltage battery supply supplies said auxiliary electrical equipment, such as on-board computers, window motors, a multimedia system, etc. The low voltage supply battery typically delivers, for example, a voltage of the order of 12 V, 24 V or 48 V. The charging of the low voltage battery can be carried out from the high voltage battery via a DC voltage converter. in DC voltage, commonly called DC-DC converter.

The on-board high voltage power grid connects the high voltage power supply battery and the inverter so that the high voltage power supply battery provides a power supply function of the electrical machine via the inverter. The high voltage power supply battery typically delivers a voltage of between 100 V and 900 V, preferably between 100 V and 500 V. The electrical energy recharge of the high voltage power supply battery can be achieved by connecting it, via the continuous high voltage electrical network of the vehicle, to an external electrical network, for example the domestic alternative electric network.

The electric machine is a rotating electrical machine, preferably intended to drive the wheels of the vehicle from the energy supplied by the high-voltage power supply battery. More specifically, the electric machine is an AC electric machine powered by polyphase currents. For example, the electric machine may be an AC motor. In the preferred example described below, the electrical machine is powered by a three-phase current source without this being limited by the scope of the present invention.

In this example, the control of the electric machine is performed by means of the inverter which converts the DC current supplied by the high voltage power supply battery into three alternative control currents, for example sinusoidal. In other words, the function of the inverter is to transform the DC current delivered to the input by the high voltage supply battery into three phase currents for controlling the electric machine. Conversely, in another mode of operation, the electric machine can also providing three AC currents to the inverter so that said inverter transforms them into a DC current for charging the high-voltage battery.

FIGS. 1 to 2 show an example of an electrical machine 10, FIGS. 3 to 6 an example of an electrical connection bar and an electrical conductor, and FIGS. 7 to 9 an example of an inverter 20.

Referring firstly to Figure 1, as mentioned above, the electric machine 10 is a so-called "rotating" machine in the form of a three-phase electric motor comprising a housing 100, for example metal, in which are housed a rotor and a stator (not shown).

The electrical machine 10, in particular the housing 100, comprises an outer wall 1 10 on which is fixed an electrical connection bar 1 15, including a support bar 120 of the electrical connection bar 1 15. In particular, the support bar 120 is made of insulating material, for example of a plastic material, and on this support bar 120 are slidably mounted three electrical conductors 130.

Referring to Figures 2 to 6, each electrical conductor 130 is in the form of a lamella electrically conductive material, in particular metal, for example made of copper, L-shaped. One of the two parts of the L, called connection portion, comprises a free end, called "connection" 130A, delimiting a fixing hole 130A1 (Figure 2). The other part of the L, called the connecting part, comprises a connection end 130B electrically connected to a phase cable 140 (FIG. 2) adapted to convey a phase current to the electrical machine 10 in order to electrically control the phases of said electric machine 10.

Each electrical conductor 130 is able to slide in translation relative to the support bar 120, that is to say also with respect to the housing 100 of the electrical machine 10, to facilitate its positioning relative to a corresponding connection terminal 240 of the inverter 20 as will be described hereinafter, in particular with reference to FIGS. 11 to 14.

To this end, as shown in Figures 3 and 4, the support bar 120 comprises a first portion in the form of a plate 120A, intended to be fixed on the outer wall 1 10 of the housing 100 of the electrical machine 10, and a second portion in the form of a holding member 120B, mounted on the plate 120A and defining three sliding members in the form of three sliding housings 120B1 in each of which is mounted, slidably, the connecting portion of the corresponding electrical conductor 130. It goes without saying that any other means of sliding allowing the translation of the electrical conductors 130 could be used such as, for example, a rail system, a loop.

As illustrated in Figure 6, each sliding member 120B1 comprises two grooves 120B2 extending in a first direction Y and each receiving a portion 130 B2 of the electrical conductor 130 (illustrated in Figure 5) to guide said electrical conductor 130 in translation along said first direction Y.

Each groove 120B2 has a width greater than that of the portion 130B2 of the electrical conductor 130 received in said groove 120B2, so as to allow a translation of the electrical conductor 130 in a second transverse direction Z (Figures 1 1 and 12), especially perpendicular, to the first direction Y.

FIG. 7 shows an example of an inverter 20. The inverter 20 comprises a housing 200 in which an electronic power module 210 is mounted. The inverter also comprises, with reference to FIGS. 8 and 11 at 14, a plurality of electrical connection terminals 231, 232, 240.

More specifically, in this example and with reference to FIGS. 8 and 11 to 14, the inverter 20 comprises an electrical connection terminal called "positive terminal" 231 intended to be connected to the positive potential of the power supply battery. high voltage, an electrical connection terminal called "negative terminal" 232, adapted to be connected to the negative potential of the high voltage supply battery and three electrical connection terminals 240 intended to come against a connection end 130A of a conductor corresponding electrical 130 to electrically connect the inverter 20 to the electrical machine 10 via the electrical conductors 130. To this end, each connection terminal 240 may be in the form of an electrically conductive blade, including metal, including a hole fastener 240A (FIG. 13).

It will be noted that the inverter 20 could comprise a different number of connection terminals 240, in particular a number depending on the number of phases of the electrical machine 10 controlled by the inverter 20.

The inverter 20 has the function of converting the direct current supplied by the high voltage power supply battery into three alternative control currents, for example sinusoidal, so-called "phase" for controlling the electric machine 10 (or vice -to convert the AC phase currents into a DC current to recharge the high voltage battery). To this end, the power electronic module 210 comprises electronic power components through which the energy supply to the electrical machine 10, in particular for transforming the direct current into alternating currents or vice versa. These electronic power components may comprise electronic switches, such as for example semiconductor transistors, arranged in electrical circuit to allow a controlled passage of electrical energy between the high voltage power supply battery and the electric machine 10. In particular the electronic power components comprise bare semiconductor chips for which the casing of the power electronic module 210 encapsulates.

Moreover, the inverter 20 comprises three attachment zones 221 (FIG. 8) each allowing access to a respective connection terminal 240 (FIGS. 1 1 to 14). The connection terminals 240 are in particular molded in an electrically insulating material, in particular plastic, of the power electronic module 210 or of the inverter 20.

Referring to Figures 8 and 9, each attachment zone 221 comprises an orifice 222 for receiving a fixing screw 300 (illustrated in Figure 14) of one of the electrical conductors 130 on one of the terminals of 240. Each fixing zone 221 also comprises guide members 223, 224 of an electrical conductor 130. The guide members 223, 224 are in particular in the form of a central chamfered portion 223 and two lateral chamfered portions. 224 (Figure 9). These guide members 223, 224 facilitate the insertion of each electrical conductor 130 into the attachment zone 221 in order subsequently to make an electrical connection with the corresponding connection terminal 240. The guide members 223, 224 are in particular the edges of an opening of parallelepipedal shape, in particular rectangular.

Preferably, the slope of the central chamfered portions 223 and lateral 224 is for example less than 45 ° or even less than 30 ° to easily guide the insertion of the connection end 130A of the electrical conductors 130 in the areas of respective fixing 221 as will now be detailed.

An assembly example of the assembly formed by the electric machine 10 and the inverter 20 will now be described, in particular with reference to Figures 10 to 15.

First, in a step E1, as shown in Figure 11, an operator places the connection terminals 240 of the inverter 20 in front of the electrical conductors 130 substantially parallel to an axis called "insertion" X and approximates the connection terminals 240 of the electrical conductors 130 so that the connecting end 130A of each electrical conductor 130 is directed to the respective connection terminal 240. In a step E2, as illustrated in FIG. 12, when the connection ends 130A come into contact with the chamfered portions 223, 224 of the inverter 20, these chamfered portions 223, 224 guide, in a step E3, said connection ends 130A to their respective attachment area 221. The electrical conductors 130 then slide simultaneously in the sliding housings 120B1 of the support bar 120 of the electrical connection bar 1 15.

In other words, the blades of the electrical conductors 130 move simultaneously along the insertion axis X and the first direction Y (Figure 12), orthogonal to said insertion axis X, thanks to the central chamfered portions 223. This displacement in the first direction Y is made possible by the sliding property of the conductor 130 relative to the support bar 120, in particular by means of the sliding member 120B1 of the support bar 120. The blades of the electrical conductors 130 also move according to a second direction Z (FIG. 12), orthogonal to the first direction Y, thanks to the lateral chamfered portions 224. This displacement along this second direction Z is made possible by the grooves 120B2 provided in the support bar 120 which form a space around each portion 130B2 of the electrical conductors 130.

Thus, the connection end 130A passes the chamfered portions 223, 224 to a final position (step E4) illustrated in FIG. 13, in which the face of the connection end 130A comes against the face of the connection terminal 240. In particular, the fixing hole 130A1 of the electrical conductor 130 comes to the right of the fixing hole 240A of the connection terminal 240 and the fixing hole 222 of the fixing zone 221.

In a step E5, the operator can advantageously fix each electrical conductor 130 on the corresponding connection terminal 240, for example by means of a fixing screw system 300, as illustrated in FIG. 14. alternatively, the attachment could be directly made by abutting or sliding connection of the electrical conductors 130 and the connection terminals 240 rather than by the use of an external fastening element of the fixing screw type 300 in order to further simplify the assembly of the assembly 1. The fixing could be achieved by other means to secure the connection terminals 240 and the electrical conductors 130, for example by welding.

The invention is not limited to the single example described above. The figures represent a particular embodiment which combines several embodiments. However, the features related to the embodiments may be independent of each other from one mode to another, or combined with one another, as is apparent from the claims.

Claims

An electrical connection bar (1-15) configured to make an electrical connection between a first electrical equipment (10) and a second electrical equipment (20), said electrical connection bar (1-15) comprising:

at least one electrical conductor (130) having a first end, referred to as a connection end (130B), intended to be connected to a connection terminal (140B) of the first electrical equipment (10) and a second end, called a connection end (130 A), intended to be connected to a connection terminal (240) of the second electrical equipment (20),

a support (120) of electrically insulating material in which said electrical conductor (130) is mounted,

said electrical conductor (130) being movable in translation relative to said support (120).

An electrical connecting bar (115) according to claim 1, wherein the electrical conductor (130) is slidably configured in or on a slide member (120B1) formed in the carrier (120).

3. Electrical connection bar (1 15) according to the preceding claim, wherein the sliding member (120B1) comprises at least one groove (120B2) extending in a first direction (Y) and receiving a portion (130B2). the electrical conductor (130) for guiding the conductor in translation along said first direction (Y).

4. Electrical connection bar (1 15) according to the preceding claim, wherein said groove (120B2) has a width greater than that of the portion (130B2) of the conductor (130) received in the groove, so as to allow a translation electrical conductor (130) in a second direction (Z) transverse, especially perpendicular to the first direction (Y).

5. Electrical connection bar (115) according to one of the preceding claims, wherein the electrical conductor (130) is in the form of an L-shaped lamella of which:

one of the two parts of the L, called the connecting part, is mounted in or on the support (120) so as to be able to move in translation in said support, and comprises a connecting end (130B) intended to be connected to the connection terminal (140B) of the first electrical equipment (10), and

the other part of the L, called the connection part, comprises a connection end (130A) for connection to the connection terminal (240) of the second electrical equipment (20).

6. Electrical connection bar (115) according to one of the preceding claims, wherein the support (120) comprises a first portion (120 A) and a second portion (120B) nested one inside the other so as to at least partly maintaining the electrical conductor (130), the first portion (120 A) of the support (120) being intended to be integral with the first electrical equipment (10).

An electrical connection bar (115) according to one of the preceding claims, comprising a plurality of said electrical conductors (130) mounted in the carrier (120) and configured to connect respective ones of the first connection terminals (140B, 240) ( 10) and the second (20) electrical equipment.

8. An assembly (1) electrical, in particular for electric or hybrid vehicle, comprising a first electrical equipment (10) and a second electrical equipment (20), each of said equipment comprising at least one connection terminal (140B, 240), said assembly (1) being characterized in that it comprises an electrical connection bar (1 15) according to one of the preceding claims connecting the connection terminals (140B, 240) of the first (10) and second (20) electrical equipment .

9. Assembly (1) according to the preceding claim wherein,

the connection terminal (140B) of the first electrical equipment (10) is formed in a deformable electrical conductor (140),

the support (120) of said electrical connection bar (1 15) is integral with the first electrical equipment (10),

said second equipment (20) comprising at least one guide member (223, 224) adapted for mounting the connection end (130A) of the electrical conductor (130) of the connection bar (115) to the terminal (240) of the second equipment (20), cooperate with the sliding of the electrical conductor (130) in the carrier (120) to guide the connection end (130A) to the connection terminal (240) of the second equipment ( 20).

10. Electrical assembly (1) according to the preceding claim, wherein the guide member comprises a chamfered portion (223, 224).

11. The assembly of claim 8 to 10, wherein the first electrical equipment (10) is an electric machine, in particular for driving a motor vehicle, and the second electrical equipment (20) is an inverter for supplying said electric machine to from a source of electrical energy.

12. A method of electrical connection between a first (10) and a second (20) electrical equipment, said first equipment (10) comprising at least one electrical connection terminal (140B) formed in a deformable electrical conductor (140), said second electrical equipment (20) comprising at least one connection terminal (240) and at least one guide member (223), and the support (120) of an electrical connection bar (115) according to one of claims 1 to 8 being integral with the first electrical equipment (10), said method being characterized in that it comprises the steps of:

attaching the connecting end (130B) of the electrical conductor (130) of the connecting bar (1 15) to the connection terminal (140B) of the first electrical equipment (10), - placing the connection terminal (240) ) of the second electrical equipment (20) facing the connection end (130A) of the electrical conductor (130) of the connection bar (1 15),

mounting the connection end (130A) of the electrical conductor (130) of the connection bar (115) to the terminal (240) of the second equipment (20) by bringing the first and second electrical equipment together, so that when the end of connection

(130A) comes into contact with the guide member (223), the latter cooperates with the translation of the electrical conductor (130) in the support (120) of the electrical connection bar (1 15) to guide the end of the connection (130A) on the connection terminal (240) of the second equipment (20),

- Fixing the connecting end (130A) on the connection terminal (240) of the second equipment (20).