Electrical component, electrical equipment, electric driving system and vehicle

Abstract

The present disclosure relates to an electrical assembly (100) comprising: a first electrical conductor (101) and a second electrical conductor (102) for transmitting an electrical current, a first end of the first electrical conductor (101) and a first end of the second electrical conductor (102) being connected to a high voltage supply battery, a second end of the first electrical conductor (101) and a second end of the second electrical conductor (102) being connected to terminals of a capacitor; a magnet (103) having a main opening (O), the magnet (103) surrounding one of the first electrical conductor (101) and the second electrical conductor (102) for guiding a magnetic field generated by concentrating a current flowing in the first electrical conductor (101) or the second electrical conductor (102); and a support (104) configured to fixedly support the first electrical conductor (101), the second electrical conductor (102) and the magnet (103). The present disclosure also relates to an electrical device, an electric drive system and a vehicle comprising such an electrical assembly.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an electrical assembly. More specifically, the present disclosure relates to an electrical assembly measuring the output current of a high-voltage supply battery connected to an inverter. The present disclosure also relates to an electrical device, an electric drive system and a vehicle comprising such an electrical assembly. BACKGROUND

[0002] As it is known, electric or hybrid motor vehicles comprise an electric drive system powered by a high-voltage battery connected to an on-board high-voltage electrical system and a large number of auxiliary electrical devices powered by a low-voltage battery connected to a low-voltage on-board electrical system.

[0003] The high-voltage power battery supplies electric power to the electric drive system for propelling the motor vehicle. More specifically, an inverter is configured to convert the direct current supplied by the high-voltage battery into three alternating control currents to power the electric motor. In this regard, the inverter comprises an electrical assembly conveying the energy to power the electric motor and an electronic control unit comprising an electronic assembly for controlling the electrical assembly of the inverter. The electrical assembly of the inverter can be arranged in an electronic power module. Typically, the electronic power module comprises a housing containing the electrical assembly conveying the energy to power the electric motor.

[0004] It is noted here that the term "electronic power module" is understood to include an assembly conveying the components to power the electric motor, including those configured to convert direct current into alternating current or vice versa. The components can include electronic switches, such as semiconductor transistors arranged in a circuit to enable the controlled transfer of electrical energy between the high-voltage power battery and the electric motor. More particularly, the components are bare semiconductor chips for which the housing provides encapsulation. In other words, the electronic power module is an assembly comprising a plurality of semiconductor chips forming a circuit encapsulated in the same housing.

[0005] The inverter likewise comprises three three-phase electrical output connections connected to the phases of the electric motor. The connection between the electrical connections of the inverter and the phase connections of the electric motor is provided by electrical conductors of a specific design. When the electric motor is a three-phase electric motor, the electric motor will comprise three electrical connections called "phase connections", while the inverter will comprise three electrical connections connected to the phase connections of the electric motor, so that it controls the electric motor using three electrical currents called "phase currents", which are generated by the electrical currents supplied by the inverter from the high-voltage battery.

[0006] As it is known, the inverter is an electrical system that powers the electric motor with a higher voltage and a more precise method of measuring the electrical energy than traditional cars equipped with internal combustion engines, and if the flow of current is not precisely controlled, the risks caused by the current will increase. While precise monitoring of the electric current of an electric vehicle reduces deviations in the control of the electric motor.

[0007] To achieve this, it is common to measure the magnetic field at the level of each output connection of the electrical system in question. Thus, a magnetic field measurement sensor is installed so that it measures the magnetic field induced by the current at the level of each output connection of the electrical system. The value of each magnetic field is transmitted to the sensor to determine the intensity of each output current. Through current monitoring it is also possible to perceive whether the vehicle is currently moving, charging or discharging. Thus, it can identify the necessary current at any given moment and transmit an error message when there is a deviation. Regardless of the process, it is necessary to identify and take countermeasures quickly enough before a dangerous situation occurs.

[0008] In the prior art, each output connection in the inverter is equipped with a magnetic field measurement device, which has an air gap and a sensor. By way of example, the magnetic field is measured at the level of the air gap of the magnet and is then transmitted to the sensor. More specifically, each output current of the inverter flows through the main opening of the corresponding magnet, which will therefore acquire an induced magnetic field, measure it and thus transmit it to the sensor, which will then determine the intensity of each phase current.

[0009] Due to the important role of the magnetic field measurement device, it is necessary to have an electrical assembly that can replace the magnetic field measurement device, so that, in the event of failure of the aforementioned magnetic field measurement device, the electrical assembly provided by the present disclosure can achieve the same function as the aforementioned magnetic field measurement device, ensuring the normal operation of the vehicle. SUMMARY

[0010] Therefore, the present disclosure aims to solve the above-mentioned problems, and the purpose is to provide a new type of electrical assembly, electrical equipment, electric drive system and vehicle. The electrical assembly according to the present disclosure can correctly control the inverter by measuring the current input to the inverter, as a backup electrical assembly that achieves the same function, ensuring the normal operation of the vehicle.

[0011] The object is achieved by an electrical assembly according to one embodiment of the present disclosure, comprising: a first electrical conductor and a second electrical conductor for transmitting an electric current, a first end of the first electrical conductor and a first end of the second electrical conductor being connected to a high-voltage supply battery, a second end of the first electrical conductor and a second end of the second electrical conductor being connected to a terminal of a capacitor; a magnet, the magnet having a main opening, the magnet surrounding one of the first electrical conductor and the second electrical conductor for guiding a magnetic field generated by the electric current flowing in the first electrical conductor or the second electrical conductor; a support configured to fixedly support the first electrical conductor, the second electrical conductor and the magnet.

[0012] Thanks to the present invention, the current supplied from the high-voltage supply battery can be measured by means of the magnet.

[0013] According to an embodiment of the application, the magnet, the first electrical conductor and the second electrical conductor are housed together by the support, so that the electrical assembly is a single-piece assembly.

[0014] According to an embodiment of the disclosure, the magnet has a U shape, the main opening being delimited by the U shape.

[0015] According to an embodiment of the disclosure, the support is an integral overmold formed on the first electrical conductor, the second electrical conductor and the magnet.

[0016] According to an embodiment of the disclosure, the electrical assembly further comprises a sensor configured to measure an output current of the high-voltage battery, the sensor comprising a magnetic field sensitive assembly in an air gap of the magnet, the magnetic field sensitive assembly being configured to measure a magnetic field induced by a corresponding electrical current flowing in the first electrical conductor or in the second electrical conductor. In particular, the air gap is the space between the top ends of the magnets.

[0017] According to an embodiment of the disclosure, the sensor further comprises an electronic control card configured to determine the output current based on values obtained from the magnetic field sensitive assembly. In particular, the electronic control card is a control unit of the inverter.

[0018] According to an embodiment of the disclosure, the magnet extends in a first plane, the first plane being orthogonal to a second plane, at least a portion of the first electrical conductor or of the second electrical conductor extending from the second plane.

[0019] According to an embodiment of the disclosure, the second end of the first electrical conductor and the second end of the second electrical conductor are connected to the terminals of the capacitor by laser welding.

[0020] According to an embodiment of the disclosure, the support comprises at least one mounting structure configured to secure the support.

[0021] The disclosure also relates to an electrical device comprising an electrical assembly as described above.

[0022] According to an embodiment of the disclosure, the electrical device is an inverter configured to be electrically connected on the one hand to an electric machine and on the other hand to a high-voltage supply battery.

[0023] The disclosure also relates to an electric drive system comprising an electrical assembly as described above and / or an electrical device as described above.

[0024] The disclosure also relates to a vehicle comprising an electric drive system as described above. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference made to the accompanying drawings, of which:

[0026] Figure 1 is a schematic view of a first direction of a part of an electrical assembly provided by embodiments of the present disclosure;

[0027] Figure 2 is a schematic view of a second direction of a part of an electrical assembly provided by embodiments of the present disclosure;

[0028] Figure 3 is a cross-sectional schematic view of an electrical assembly provided by embodiments of the present disclosure. DETAILED DESCRIPTION

[0029] In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure.

[0030] For the convenience of description, the drawings of the present disclosure have simplified or omitted components commonly used in the art, such as external connecting lines and other components irrelevant to the description of the present disclosure. These omitted or simplified components do not affect the understanding of the present disclosure by those skilled in the art.

[0031] Figure 1 and Figure 2 shows schematic views of different directions of a part of an electrical assembly provided by embodiments of the present disclosure.

[0032] As Figure 1 and Figure 2As shown, electrical assembly 100 includes a first conductor 101 and a second conductor 102. One end of each conductor is connected to a high-voltage battery, while the other ends are connected to terminals of a capacitor. These conductors are used to transmit current supplied by the high-voltage battery. Furthermore, the capacitor is connected to a power module, which converts the DC power from the high-voltage battery into AC power. Capacitors, for example, are inverter capacitors. Their primary function is to absorb and filter certain undesirable electrical energy, thereby protecting circuits from harmful effects. Currently, they are most commonly used in power supply batteries, where they can help improve input power quality and suppress power input jitter. For example, the first end of first conductor 101 is connected to the positive terminal of the high-voltage battery, the second end of first conductor 101 is connected to the first terminal of the capacitor, the first end of second conductor 102 is connected to the negative terminal of the high-voltage battery, and the second end of second conductor 102 is connected to the second terminal of the capacitor. For example, in one embodiment of the present disclosure, the second end of the first electrical conductor 101 and the second end of the second electrical conductor 102 are connected to the terminal of the capacitor by laser welding. For another example, the first terminal of the capacitor is connected to the positive terminal of the power module by laser welding, and the second terminal of the capacitor is connected to the negative terminal of the power module by laser welding. It should be noted that the laser welding connection method is only an example, and the connection can also be made in other ways, which is not limited by the present disclosure. For example, the power module is a silicon carbide field effect transistor (SiC-MOSFET). That is to say, the current supplied by the high-voltage supply battery is supplied to the power module via the first electrical conductor 101 and the capacitor, and then returns to the high-voltage supply battery via the capacitor and the second electrical conductor 102, forming a current loop.

[0033] like Figure 1 and Figure 2 As shown, the electrical component further includes a magnet 103, which is used to guide and gather the magnetic field generated by the current flowing in the first electrical conductor 101 or the second electrical conductor 102. The magnet 103 has a main opening O, and the first electrical conductor 101 passes through the main opening O of the magnet 103. It should be noted that since the currents flowing through the first electrical conductor 101 and the second electrical conductor 102 are equal, the magnet 103 can be mounted on either the first electrical conductor 101 or the second electrical conductor 102.

[0034] For example, in one embodiment of the present disclosure, the magnet 103 has a U-shape, and the main opening O is defined by the U. The main opening O is therefore an inner space defined by the magnet 103.

[0035] It should be noted that the magnet 103 may also be other types of magnets, such as a C-shaped magnet, and the present disclosure does not limit the type of the magnet 103 .

[0036] In one embodiment of the present disclosure, the magnet 103 extends on a first plane, the first plane is orthogonal to a second plane, and at least a portion of the first electrical conductor 101 or the second electrical conductor 102 extends from the second plane.

[0037] like Figure 1 and Figure 2 As shown, the electrical assembly further comprises a support 104, for example made of an electrically insulating material (eg, plastic), configured to fixedly support the first electrical conductor 101, the second electrical conductor 102, and the magnet 103. Therefore, the electrical assembly of the present disclosure is a single-piece assembly.

[0038] In one embodiment of the present disclosure, the support member 104 is an integral covering member formed on the first electrical conductor 101 , the second electrical conductor 102 and the magnet 103 in an overmolding manner.

[0039] In one embodiment of the present disclosure, the support member includes at least one mounting structure configured to secure the support member.

[0040] For example, Figure 1 and Figure 2 As shown, support member 104 is provided with three mounting structures 105. For example, mounting structures 105 are provided with positioning holes for positioning electrical components and mounting bushings for mounting electrical components. Mounting structures 105 are used to secure screws or bolts. Support member 104 is fixed to the housing of the electrical component via screws or bolts.

[0041] Figure 3 A cross-sectional schematic diagram of an electrical component provided by an embodiment of the present disclosure is shown.

[0042] like Figure 3 As shown, electrical assembly 100 further includes a sensor 106. Sensor 106 is configured to measure the output current of the high-voltage battery. Sensor 106 includes a magnetic field-sensitive component 1061 and an electronic control card 1062. Magnetic field-sensitive component 1061 is configured to measure the magnetic field induced by the corresponding current flowing in first electrical conductor 101 or second electrical conductor 102. Electronic control card 1062 is configured to determine the output current of the high-voltage battery based on the value measured by the magnetic field-sensitive component.

[0043] The magnetic field sensitive component 1061 may be located in the air gap 1031 of the magnet 103 in order to determine the current flowing through the electrical conductor passing through the magnet 103. The air gap 1031 of the magnet 103 is mainly generated between the top ends of the magnet 103.

[0044] like Figure 3As shown, the magnetic field sensitive component 1061 in the air gap 1031 of the magnet 103 is mounted on an electronic control card 1062. The electronic control card 1062 belongs for example to an electronic control unit of the inverter. Thus, the electronic control card 1062 is configured to determine the currents flowing through the inverter using the magnetic field measured with the magnetic field sensitive component 1061 and the magnet 103.

[0045] The first electrical conductor 101 and the second electrical conductor 102 run across the main opening O of the magnet 103. The magnet 103 guides the magnetic field generated by the current flowing through the first electrical conductor 101 or the second electrical conductor 102. The magnetic field induced by the magnet 103 is detected by means of the magnetic field sensitive component 1061 which converts the magnetic field into an electrical current supplied to the electronic control card 1062. For example, the magnetic field sensitive component 1061 is a Hall effect sensor.

[0046] According to another aspect of the present disclosure, an electrical assembly is proposed comprising an electrical component as described above. It is understood that the electrical assembly of the present disclosure also has the advantages described above with respect to the electrical component.

[0047] In one embodiment of the present disclosure, the electrical assembly can be an inverter configured to be electrically connected on the one hand to an electrical machine and on the other hand to a high-voltage supply battery.

[0048] According to another aspect of the present disclosure, an electrical drive system is proposed comprising an electrical assembly as described above and / or an electrical device as described above. It is understood that the electrical drive system of the present disclosure also has the advantages described above with respect to the electrical assembly.

[0049] According to another aspect of the present disclosure, a vehicle is proposed comprising an electrical drive system as described above. The vehicle can be an Electrified Vehicle such as a Battery Electric Vehicle (BEV), a Hybrid Electric Vehicle (HEV), a Plug-in Hybrid Electric Vehicle (PHEV), a Range extended EV, a Fuel Cell Electric Vehicle (FCEV). The vehicle can also be a hydrogen energy vehicle.

[0050] For example, the vehicle comprises an electric machine, an inverter, and for example a high-voltage supply battery, a high-voltage on-board power supply system, a low-voltage supply battery, a low-voltage on-board power supply system, and a plurality of auxiliary electrical devices. The electrical assembly provided by the embodiments of the present disclosure is implemented in the high-voltage supply battery and the inverter, and the purpose is to determine the current output by the high-voltage supply battery or the current input to the inverter. It should be understood that the vehicle of the present disclosure also has the advantages described above with respect to the electrical assembly.

[0051] Some features, structures, or characteristics in one or more embodiments of the present disclosure can be appropriately combined.

[0052] The above is a description of the present disclosure and should not be considered limiting. Although several exemplary embodiments of the present disclosure are described, those skilled in the art will readily understand that many modifications can be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Accordingly, all such modifications are intended to be included within the scope of the present disclosure as defined in the claims. It should be understood that the above is a description of the present disclosure and the present disclosure should not be considered limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the present disclosure.

Claims

1. An electrical assembly (100), characterized by The electrical assembly (100) comprises: a first electrical conductor (101) and a second electrical conductor (102) for the transmission of an electric current, wherein a first end of the first electrical conductor (101) and a first end of the second electrical conductor (102) are connected to a high-voltage supply battery, and a second end of the first electrical conductor (102) and a second end of the second electrical conductor (102) are connected to a terminal of a capacitor; a magnet (103), wherein the magnet (103) has a main opening (O) and surrounds one of the first electrical conductor (101) and the second electrical conductor (102) for guiding a magnetic field generated by the electric current flowing in the first electrical conductor (101) or in the second electrical conductor (102); a support (104) configured to fixedly support the first electrical conductor (101), the second electrical conductor (102) and the magnet (103).

2. The electrical assembly (100) of claim 1, characterized in that The magnet (103) has a U shape, the main opening (O) being delimited by the U shape.

3. The electrical assembly (100) of claim 1, wherein, The support (104) is an integral overmold formed on the first electrical conductor (101), the second electrical conductor (102) and the magnet (103) by overmolding.

4. The electrical assembly (100) of claim 1, wherein, The electrical assembly (100) further comprises a sensor (106), wherein the sensor (106) is configured to measure an output current of the high-voltage supply battery, and the sensor (106) comprises a magnetic field sensitive assembly (1061) in an air gap of the magnet, the magnetic field sensitive assembly (1061) being configured to measure a magnetic field induced by the corresponding electric current flowing in the first electrical conductor (101) or in the second electrical conductor (102).

5. The electrical assembly (100) of claim 4, characterized in that The sensor (106) further comprises an electronic control card (1062), wherein the electronic control card (1062) is configured to determine the output current on the basis of values obtained from the measurement of the magnetic field sensitive assembly (1061).

6. The electrical assembly (100) of claim 1, wherein, The magnet (103) extends in a first plane, the first plane being orthogonal to a second plane, at least a portion of the first electrical conductor (101) or of the second electrical conductor (102) extending from the second plane.

7. The electrical assembly (100) of claim 1, wherein, The second end of the first electrical conductor (101) and the second end of the second electrical conductor (102) are connected to the terminal of the capacitor by means of laser welding.

8. The electrical assembly (100) of claim 1, wherein, The support (104) comprises at least one mounting structure (105) configured to fix the support (104).

9. An electrical device, characterized by The electrical device comprises the electrical assembly (100) according to any one of claims 1 to 8.

10. The electrical device of claim 9, wherein, The electrical device is an inverter configured to be electrically connected, on the one hand, to an electric motor and, on the other hand, to a high-voltage supply battery.

11. An electric drive system comprising the electrical assembly according to any one of claims 1 to 8 and / or the electrical device according to claim 9 or 10.

12. A vehicle comprising the electric drive system according to claim 11.

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