CN222916486U - Configuration for ensuring electromagnetic compatibility between electric devices - Google Patents

Abstract

The application relates to a configuration for ensuring EMC between electric devices, which is applied to a vehicle and comprises a motor cavity, an electronic control unit cavity and a connector assembly, wherein the motor cavity is configured to accommodate the motor, the electronic control unit cavity is configured to accommodate the electronic control unit, the motor cavity and the electronic control unit cavity are communicated with each other through a first opening, the connector assembly is configured to electrically connect the motor and the electronic control unit, and comprises a motor side, an electronic control unit side and a spacing part positioned between the motor side and the electronic control unit side, and the spacing part is matched with the first opening so as to isolate the motor cavity and the electronic control unit cavity from each other. The configuration of the application optimizes the cable layout, the cable of the motor can connect two (motor and ECU) spaces in nearly one plane, the defect that the space of the plane is insufficient and cannot be arranged is overcome, and the whole space is saved.

Description

Configuration for ensuring electromagnetic compatibility between electric devices

Technical Field

The application relates to the technical field of electric automobiles, in particular to a configuration for ensuring electromagnetic compatibility (E l ectromagnet ic Compat i b i l ity, EMC) between electric devices.

Background

In current automobiles, particularly hybrid vehicles, the electric motor is required to be electrically connected to an electronic control unit (E l ectron i c Contro l Un it, ECU) in order to adjust the output characteristics of the electric motor to the drive train. It is conceivable that the output voltage of the electric machine is quite high in order to ensure that the output of the electric machine to the drive train is sufficient to propel the vehicle. The existing high-voltage wire holder is generally of an integral plastic-coated copper bar structure, which is installed between a motor housing and an ECU housing, one end of a copper bar (i.e., a connecting end) of the high-voltage wire holder is connected to the connecting end of the motor, and the other end is connected to the connecting end of the ECU so as to transmit current between the two.

However, such a high-voltage wire holder often suffers from a magnetic leakage phenomenon in the middle injection-molded part due to the adoption of the integral plastic-coated copper bar structure, and is not grounded, that is, a space where the motor and the ECU are located has not yet formed for shielding the magnetic field. Even if the connection ends of the high-voltage wire holders are designed to lie on the same plane, this requires that all the cables also be arranged correspondingly on the same plane. This results in the connection end of the high voltage wire holder for connection to the motor/ECU being made of plastic, which results in this part being unable to isolate electromagnetic interference (Electromagnetic Interference, EMI).

Disclosure of Invention

In order to overcome at least one of the drawbacks described in the prior art, the present application proposes a configuration for ensuring electromagnetic compatibility between electric devices, applied to a vehicle, comprising:

A motor cavity configured to house a motor;

An electronic control unit cavity configured to house an electronic control unit, and the motor cavity and the electronic control unit cavity communicate with each other through a first opening;

And a connector assembly configured to electrically connect the motor and the electronic control unit, including a motor side, an electronic control unit side, and a spacing portion between the motor side and the electronic control unit side, the spacing portion mating with the first opening so as to isolate the motor cavity and the electronic control unit cavity from each other.

According to one embodiment of the application, the spacer portion has a first side facing the motor side and a second side facing the electronic control unit side, the first side and the second side being electrically conductive.

According to an embodiment of the application, the second side is provided with a number of electrical contacts configured to contact the housing of the electronic control unit.

According to one embodiment of the application, the number of electrical contacts are arranged in a column on the second side.

According to one embodiment of the application, the number of electrical contacts are made of an elastic material.

According to some embodiments of the application, the motor side of the connector assembly has a number of first connection terminals configured to be electrically connected to respective output terminals of the motor.

According to one embodiment of the application, the electronic control unit side of the connector assembly has a plurality of second connection terminals configured to be electrically connected to respective input terminals of the electronic control unit, respectively, and the plurality of second connection terminals have a one-to-one correspondence with the plurality of first connection terminals, and are thereby electrically connected pair by pair.

According to one embodiment of the application, the number of second connection terminals are arranged to lie in a common plane.

According to one embodiment of the application, the motor is a three-phase motor, and the plurality of first connection terminals are divided into three groups corresponding to three phases of the motor, respectively.

According to one embodiment of the application, the inner surfaces of the motor cavity and the electronic control unit cavity are electrically conductive.

The configuration of the application optimizes the cable layout through the parallel and/or laminated arrangement of the connecting ends on the basis of the copper bar configuration of the high-voltage wire holder planarization arrangement in the prior art, and the cable of the motor can connect two (the motor and the ECU) spaces in nearly one plane, thereby solving the defect that the plane space is insufficient and the arrangement is impossible and saving the whole space. In particular, the configuration of the application is provided with several electrical contacts for contacting the ECU housing, thereby achieving a flexible connection between the motor and the ECU, thus constituting a conductive shielding space for communication, ultimately ensuring EMC of the respective electrical device.

Drawings

Fig. 1 shows that the configuration of ensuring EMC between electrical devices is a front view according to one embodiment of the application;

FIG. 2 shows a front view of the connector assembly in the configuration shown in FIG. 1, and

Fig. 3 shows a cross-sectional view of the connector assembly shown in fig. 2 along section line A-A.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the application, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the application, without affecting the effect or achievement of the objective.

References in this specification to orientations or positional relationships as "upper", "lower", "left", "right", "intermediate", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings, are also for convenience of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, which shows a front view of a configuration for ensuring EMC between electrical devices according to one embodiment of the application. This configuration includes a motor cavity that houses the motor 100 and an ECU cavity that houses the ECU 200. The inner surfaces of the motor chamber and the ECU chamber are each provided to be conductive, and for example, it is possible to provide a film that is conductive to be adhered to the inner surfaces of the motor chamber and the ECU chamber, to be plated with a conductive material or to be coated with a conductive coating, or the like, respectively. The motor chamber and the ECU chamber communicate with each other with a first opening (not shown) therebetween.

The configuration further includes a connector assembly 300, the connector assembly 300 including a motor side 310, an ECU side 320, and a spacer portion 330 between the motor side 310 and the ECU side 320. In the present embodiment, the motor side 310 and the ECU side 320 are formed in substantially plate shapes, respectively, so as to conform to the outer contours of the motor 100 and the ECU 200 as much as possible in the assembled state. The motor side 310 and the ECU side 320 respectively include a plurality of connection terminals, i.e., the motor side 310 has a plurality of first connection terminals 311, and the ECU side 320 has a plurality of second connection terminals 321, the first connection terminals 311 being configured to be connected with respective output terminals of the motor 100, the second connection terminals 321 being configured to be connected with respective input terminals of the ECU 200, thereby constructing an electrical connection path between the motor 100 and the ECU 200. In addition, the spacing portion 330 is formed so as to be able to close off the first opening exactly, in other words, the spacing portion 330 is fitted with the first opening, thereby completely isolating the motor chamber and the ECU chamber from each other.

Specifically, the motor 100 is a three-phase motor, and as the name implies, the housing of the motor 100 has outputs corresponding to three phases, respectively. Accordingly, as shown in fig. 2, the motor side 310 of the connector assembly 300 has 6 first connection terminals 311, each 2 of which is grouped to correspond to the U-phase/V-phase/W-phase of the motor 100, respectively. Preferably, the first connection terminal 311 groups on the left/right side in the drawing correspond to V/W phases of the motor 100, respectively, and the first connection terminal 311 groups on the lower side in the drawing correspond to U phases of the motor.

On the other hand, the ECU side 320 of the connector assembly 300 has a number of second connection terminals 321 equal to the number of first connection terminals 311, i.e., 6 as well. The 6 first connection terminals 311 and the 6 second connection terminals 321 have a one-to-one correspondence, and each pair of the first connection terminals 311 and the second connection terminals 321 are electrically connected to each other by means of the conductor path 301 formed inside the connector assembly 300. Further, the 6 second connection terminals 321 are arranged to lie on a common plane, thereby facilitating connection with the respective input terminals of the ECU 200.

In this embodiment, the ECU side 320 is formed using an injection molding process, which means that the conductor path 301 is encased in an injection molded plastic material, and then a conductive film, plated material, or conductive coating is covered on the injection molded plastic material surface. The number of first connection terminals 311 and second connection terminals 321 may be formed as connection terminals commonly found on the market, such as the finger joint (3502) disclosed in US11938825B2, which is incorporated herein by reference. Preferably, each first connection terminal 311 may include a rivet nut 311' fixed at the center of the finger, whereby connection with the corresponding output terminal of the motor is facilitated. Similarly, each second connection terminal 321 may include a rivet nut 321' secured at the center of the finger.

In order to ensure EMC of the individual electrical components, it is noted that the individual electrical components need to be enclosed by an almost complete conductor cover. As described above, the inner surfaces of the motor cavity and the ECU cavity are both provided to be conductive, however, both cavities form a notch of the shield case at the first opening. To this end, the spacing portion 330 for blocking the first opening is configured to include a first side 312 facing the motor side 310 and a second side 322 facing the ECU side 320, wherein the first side 312 and the second side 322 are also electrically conductive. Thus, when the spacer portion 330 is mated with the first opening, the conductive first side 312 and second side 322 each compensate for the shielding gap of the two cavities at the first opening.

Preferably, a number of electrical contacts 323 are formed on the second side 322. More preferably, the plurality of electrical contacts 323 are arranged in a column on the second side 322. More preferably, the plurality of electrical contacts 323 are made of an elastic material. It is thereby achieved that connector assembly 300, and in particular spacer portion 330, flexibly contacts the housing of ECU 200, but such conductive contact is not intended to transmit electrical current. In contrast, such flexible contact is intended to provide connector assembly 300 with ECU 200 in a more compatible, ground-like configuration, thereby forming an electromagnetic shield for the entire ECU 200, preventing EM I from leaking out of the gap between connector assembly 300 and ECU 200. Similarly, the same or similar arrangement may be performed for the first side 312, and will not be described herein.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A configuration for ensuring electromagnetic compatibility (EMC) between electrical components, applied to a vehicle, characterized by comprising: a motor cavity configured to accommodate a motor; an electronic control unit (ECU) cavity configured to accommodate an electronic control unit (ECU), and the motor cavity and the electronic control unit cavity are in communication with each other through a first opening; A connector assembly is configured to electrically connect the motor and the electronic control unit, and includes a motor side, an electronic control unit side, and a spacing portion located between the motor side and the electronic control unit side, wherein the spacing portion cooperates with the first opening to isolate the motor cavity and the electronic control unit cavity from each other. 2. The configuration for ensuring electromagnetic compatibility between electrical components according to claim 1, characterized in that the spacer portion has a first side facing the motor side and a second side facing the electronic control unit side, and the first side and the second side are conductive. 3 . The configuration for ensuring electromagnetic compatibility between electrical components according to claim 2 , wherein the second side surface is provided with a plurality of electrical contacts configured to contact a housing of the electronic control unit. 4 . The configuration for ensuring electromagnetic compatibility between electrical components according to claim 3 , wherein the plurality of electrical contacts are arranged in a row on the second side surface. 5 . The configuration for ensuring electromagnetic compatibility between electrical components according to claim 3 , wherein the plurality of electrical contacts are made of elastic material. 6. The configuration for ensuring electromagnetic compatibility between electrical components according to claim 1, characterized in that the motor side of the connector assembly has a plurality of first connection terminals configured to be electrically connected to corresponding output terminals of the motor respectively. 7. The configuration for ensuring electromagnetic compatibility between electrical components according to claim 6 is characterized in that the electronic control unit side of the connector assembly has a plurality of second connection terminals, which are configured to be electrically connected to corresponding input terminals of the electronic control unit, respectively, and the plurality of second connection terminals have a one-to-one correspondence with the plurality of first connection terminals, and are thereby electrically connected in pairs. 8 . The configuration for ensuring electromagnetic compatibility between electrical components according to claim 7 , wherein the plurality of second connection terminals are arranged to be on a common plane. 9. The configuration for ensuring electromagnetic compatibility between electrical components according to claim 6, characterized in that the motor is a three-phase motor, and the plurality of first connection terminals are divided into three groups corresponding to the three phases of the motor respectively. 10. The configuration for ensuring electromagnetic compatibility between electrical components according to claim 1, characterized in that inner surfaces of the motor cavity and the electronic control unit cavity are conductive.