Configuration for ensuring electromagnetic compatibility between electric devices

Abstract

The utility model relates to a configuration for ensuring EMC between electric devices, which is applied to a vehicle and comprises a motor cavity configured to accommodate a motor; the electronic control unit cavity is configured to accommodate an electronic control unit, and the motor cavity and the electronic control unit cavity are communicated with each other through a first opening; the connector assembly is configured to be electrically connected with the motor and the electronic control unit and comprises a motor side, an electronic control unit side and a spacing part located between the motor side and the electronic control unit side, and the spacing part is matched with the first opening; therefore, the motor cavity and the electronic control unit cavity are isolated from each other. According to the structure, the cable layout is optimized, the cable of the motor can connect two spaces (the motor and the ECU) in almost one plane, the defect that arrangement cannot be achieved due to the fact that the plane space is insufficient is overcome, and the overall space is saved.

Description

Technical Field

[0001] This application relates to the technical field of electric vehicles, and particularly to a configuration for ensuring electromagnetic compatibility (EMC) between electrical components. Background Art

[0002] In current vehicles, especially hybrid vehicles, an electric motor needs to be electrically connected to an electronic control unit (ECU) to adjust the output characteristics of the motor to the powertrain. It can be imagined that, in order to ensure that the output of the motor to the powertrain is sufficient to propel the vehicle, the output voltage of the motor is quite high. Existing high-voltage wire connectors are generally of an integral plastic-coated copper busbar structure, which is installed between the motor housing and the ECU housing. One end of the copper busbar (i.e., the connection end) of the high-voltage wire connector is connected to the connection end of the motor, and the other end is connected to the connection end of the ECU to transmit current between the two.

[0003] However, due to the use of an integral plastic-coated copper busbar structure in such a high-voltage wire connector, magnetic leakage often occurs in the intermediate injection-molded part. Moreover, the high-voltage wire connector is not grounded, that is, there is no space for shielding the magnetic field where the motor and the ECU are located. Even more, the connection ends of the high-voltage wire connector are designed to be on the same plane, which requires all cables to be arranged on the same plane accordingly. This results in that the connection ends of the high-voltage wire connector used to connect to the motor / ECU are made of plastic, thus making this part unable to isolate electromagnetic interference (EMI). Summary of the Invention

[0004] In order to overcome at least one of the above-mentioned defects of the prior art, this application proposes a configuration for ensuring electromagnetic compatibility between electrical components, which is applied to a vehicle and includes:

[0005] A motor cavity configured to accommodate a motor;

[0006] An electronic control unit cavity configured to accommodate an electronic control unit, and the motor cavity and the electronic control unit cavity communicate with each other through a first opening;

[0007] A connector assembly configured to electrically connect the motor and the electronic control unit, which includes a motor side, an electronic control unit side, and a spacer portion located between the motor side and the electronic control unit side. The spacer portion cooperates with the first opening to isolate the motor cavity and the electronic control unit cavity from each other.

[0008] According to an embodiment of the present application, 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.

[0009] According to an embodiment of the present application, a plurality of electrical contacts are provided on the second side, and are configured to contact the housing of the electronic control unit.

[0010] According to an embodiment of the present application, the plurality of electrical contacts are arranged in columns on the second side.

[0011] According to an embodiment of the present application, the plurality of electrical contacts are made of an elastic material.

[0012] According to some embodiments of the present application, the motor side of the connector assembly has a plurality of first connection terminals, which are configured to be electrically connected to the corresponding output terminals of the motor respectively.

[0013] According to an embodiment of the present application, the electronic control unit side of the connector assembly has a plurality of second connection terminals, which are configured to be electrically connected to the 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 thus electrically connected in pairs.

[0014] According to an embodiment of the present application, the plurality of second connection terminals are arranged on a common plane.

[0015] According to an embodiment of the present application, 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.

[0016] According to an embodiment of the present application, the inner surfaces of the motor cavity and the electronic control unit cavity are conductive.

[0017] Based on the copper bar configuration of the planar arrangement of the high-voltage wire connection seat in the prior art, the configuration of the present application optimizes the cable layout through the parallel and / or stacked arrangement of the connection ends. The cables of the motor can connect two spaces (the motor and the ECU) in almost one plane, solving the defect that the planar space is insufficient for arrangement and saving the overall space. In particular, the configuration of the present application is provided with a plurality of electrical contacts for contacting the housing of the ECU, thereby realizing a flexible connection between the motor and the ECU, thus forming a connected conductive shielding space, and finally ensuring the EMC of each electrical component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The configuration for ensuring EMC between electrical components according to an embodiment of the present application is shown in a front view;

[0019] Figure 2 shows Figure 1 a front view of the connector assembly in the configuration shown; and

[0020] Figure 3 shows Figure 2 a cross-sectional view of the connector assembly shown taken along section line A-A. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that the drawings provided in this embodiment only illustrate the basic concept of the present application schematically. Therefore, only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The types, numbers and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0023] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present application can be implemented. Therefore, they do not have technical substantial significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present application can produce and the objectives that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present application.

[0024] The orientation or positional relationship indicated in this specification, such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] As Figure 1As shown, it shows a front view of a configuration for ensuring EMC between electrical components according to an embodiment of the present application. This configuration includes a motor cavity and an ECU cavity. Among them, the motor cavity houses a motor 100, and the ECU cavity houses an ECU 200. The inner surfaces of both the motor cavity and the ECU cavity are set to be conductive. For example, it can be set that conductive film-like substances are adhered to the inner surfaces of the motor cavity and the ECU cavity respectively, conductive materials are plated, or conductive coatings are applied, and so on. The motor cavity and the ECU cavity communicate with each other through a first opening (not shown) located between them.

[0026] This configuration further includes a connector assembly 300. The connector assembly 300 includes a motor side 310, an ECU side 320, and a spacer portion 330 located between the motor side 310 and the ECU side 320. In this embodiment, the motor side 310 and the ECU side 320 are respectively formed in a substantially plate shape so as to fit the outer contours of the motor 100 and the ECU 200 as closely as possible in the assembled state. The motor side 310 and the ECU side 320 respectively include a number of connection terminals. That is, the motor side 310 has a number of first connection terminals 311, and the ECU side 320 has a number of second connection terminals 321. The first connection terminals 311 are configured to be connected to the corresponding output terminals of the motor 100, and the second connection terminals 321 are configured to be connected to the corresponding input terminals of the ECU 200, thereby constructing an electrical connection path between the motor 100 and the ECU 200. In addition, the spacer portion 330 is formed to be able to exactly block the first opening. In other words, the spacer portion 330 cooperates with the first opening, thereby completely isolating the motor cavity from the ECU cavity from each other.

[0027] Specifically, the motor 100 is a three-phase motor. As the name implies, the housing of the motor 100 has output terminals corresponding to three phases respectively. Correspondingly, as Figure 2 shown, the motor side 310 of the connector assembly 300 has 6 first connection terminals 311. Among them, every 2 form a group, respectively corresponding to the U phase / V phase / W phase of the motor 100. Preferably, the left / right groups of the first connection terminals 311 in the figure respectively correspond to the V phase / W phase of the motor 100, and the lower group of the first connection terminals 311 in the figure corresponds to the U phase of the motor.

[0028] On the other hand, the ECU side 320 of the connector assembly 300 has a number of second connection terminals 321, and the number thereof is equal to the number of the first connection terminals 311, that is, also 6. The 6 first connection terminals 311 and the 6 second connection terminals 321 are in a one-to-one correspondence relationship. Each pair of the first connection terminals 311 and the second connection terminals 321 are electrically connected to each other by means of a conductor path 301 formed inside the connector assembly 300. Further, the 6 second connection terminals 321 are arranged on a common plane, thereby facilitating connection to the corresponding input terminals of the ECU 200.

[0029] In this embodiment, the ECU side 320 is formed by an injection molding process, which means that the conductor path 301 is wrapped by a plastic material formed by injection molding, and then a conductive film, a material to be plated, or a conductive coating is covered on the surface of the injection-molded plastic material. A plurality of first connection terminals 311 and second connection terminals 321 can be formed into common connection terminals on the market, such as the finger portions (3502) disclosed in US11938825B2, which are incorporated herein by reference. Preferably, each first connection terminal 311 can include a riveting nut 311' fixed at the center of the finger portion, by which it is convenient to connect with the corresponding output terminal of the motor. Similarly, each second connection terminal 321 can include a riveting nut 321' fixed at the center of the finger portion.

[0030] To ensure the EMC of each electrical component, it should be noted that each electrical component needs 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 set to be conductive. However, these two cavities form a gap in the shielding cover at the first opening. For this reason, the spacer portion 330 for plugging the first opening is configured to include a first side surface 312 facing the motor side 310 and a second side surface 322 facing the ECU side 320, wherein the first side surface 312 and the second side surface 322 are also conductive. In this way, when the spacer portion 330 cooperates with the first opening, the conductive first side surface 312 and the second side surface 322 respectively make up for the shielding gaps of the above two cavities at the first opening.

[0031] Preferably, a plurality of electrical contacts 323 are formed on the second side surface 322. More preferably, these a plurality of electrical contacts 323 are arranged in columns on the second side surface 322. More preferably, these a plurality of electrical contacts 323 are made of an elastic material. Thus, the connector assembly 300, especially its spacer portion 330, is flexibly contacted with the housing of the ECU 200, but such conductive contact is not intended to transmit current. On the contrary, such flexible contact aims to form a more compatible contact similar to a grounding configuration between the connector assembly 300 and the ECU 200, thereby forming an electromagnetic shield for the entire ECU 200 and preventing EMI from leaking out through the gap between the connector assembly 300 and the ECU 200. Similarly, the same or similar settings can be made for the first side surface 312, which will not be elaborated herein.

[0032] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0033] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A configuration for ensuring electromagnetic compatibility (EMC) between electrical components, applied to a vehicle, characterized in that: include: 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 spacing 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, characterized in that: 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, characterized in that: The plurality of electrical contacts are arranged in a row on the second side.

5. The configuration for ensuring electromagnetic compatibility between electrical components according to claim 3, characterized in that: 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, 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 thus electrically connected in pairs.

8. The configuration for ensuring electromagnetic compatibility between electrical components according to claim 7, characterized in that: The plurality of second connection terminals are arranged to be located 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: The inner surfaces of the motor cavity and the electronic control unit cavity are electrically conductive.

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