Electrical equipment, electric drive assembly system and vehicle

Abstract

The utility model provides electrical equipment, an electric drive assembly system and a vehicle. The electrical apparatus includes: a housing; the circuit board is arranged in the shell, and a concave part is arranged on the circuit board; the shielding element is arranged on the circuit board and abuts against the shell, the shielding element comprises a first insertion part and a second insertion part which can be inserted into corresponding concave parts on the circuit board, the first insertion part is provided with a deformable protrusion protruding in the first direction transverse to the insertion direction, and the second insertion part is provided with a second protrusion protruding in the second direction transverse to the insertion direction. And the second inserting part is provided with a deformable bulge which protrudes towards a second direction opposite to the first direction.

Description

Technical Field

[0001] The present disclosure relates to an electric device, an electric drive assembly system and a vehicle. Background Art

[0002] Modern motor vehicles are usually equipped with electrical equipment to support various electrical functions of the vehicle, such as realizing vehicle intelligence. Various electrical equipment are also installed in electric vehicles, such as motor controllers, on-board chargers (OBC), DC-DC converters (DCDC), and high-voltage power distribution units (PDU) installed in the electric drive assembly system.

[0003] Multiple high-voltage and low-voltage electronic components installed in electrical equipment will generate electromagnetic waves to the outside world when in operation. Electromagnetic waves in certain frequency bands will cause electromagnetic interference (EMI) to the normal operation of some components or devices. This electromagnetic interference will cause intermittent failure of the device, and in severe cases, permanent damage to the component. Failure or damage of vehicle components may cause major safety accidents of the entire vehicle, threatening the lives of passengers.

[0004] The product quality of electrical equipment and vehicles is generally evaluated by EMC (Electromagnetic Compatibility), which refers to the ability of a device or system to operate in accordance with requirements in its electromagnetic environment and not to produce intolerable electromagnetic interference to any device in its environment. EMC includes two requirements: on the one hand, the electromagnetic interference generated by the device to the environment during normal operation must not exceed a certain limit; on the other hand, the device must have a certain degree of immunity to the electromagnetic interference in the environment, namely electromagnetic susceptibility (EMS).

[0005] In order to protect electrical components, especially sensitive components of printed circuit boards, from EMI and meet EMC requirements, EMC protection structures are usually set around important components of electronic devices. Common EMC protection structures are EMC shielding shrapnel, which are generally pre-fixed on printed circuit boards through tooling. However, this results in a more complicated production process and high production costs, which reduces production efficiency. In addition, in some known technical solutions, the installation stability of the EMC shielding shrapnel is not enough, resulting in insufficient protection. Utility Model Content

[0006] Therefore, an object of the present disclosure is to provide an electrical device, an electric drive assembly system and a vehicle, wherein the shielding element in the electrical device is easy to assemble, the production cost is reduced and the production efficiency is improved.

[0007] The above objects are achieved by the electric machine, electric drive assembly system and vehicle described below.

[0008] The present disclosure provides an electrical device, which includes: a housing; a circuit board, which is arranged in the housing and has a recessed portion; and a shielding element, which is arranged on the circuit board and abuts against the housing, wherein the shielding element includes a first plug-in portion and a second plug-in portion that can be inserted into the corresponding recessed portion on the circuit board, the first plug-in portion having a deformable protrusion protruding in a first direction transverse to the plug-in direction, and the second plug-in portion having a deformable protrusion protruding in a second direction opposite to the first direction. The deformable protrusion of the above-mentioned plug-in portion can be interference-fitted with the circuit board, thereby realizing the pre-positioning of the shielding element, simplifying the assembly process and reducing the production cost. In addition, the protrusions facing opposite directions make the pre-positioning of the shielding element more stable.

[0009] The electrical device according to the present disclosure may also have one or more of the following features alone or in combination.

[0010] In one embodiment, the deformable protrusion extends along the plugging direction and both ends thereof are connected to the main body of the corresponding plug-in portion. In this way, the deformable protrusion of the plug-in portion can be more firmly fitted with the circuit board through interference, and the disassembly of the shielding element is also easy to achieve.

[0011] In one embodiment, the deformable protrusion is a stamped part protruding from the main body of the corresponding plug-in part. In this way, the protrusion does not need to be installed through an additional connection step, which simplifies the processing process, thereby facilitating improved production efficiency and improved structural strength.

[0012] In one embodiment, the shielding element further comprises a plurality of spring sheets, which abut against the housing and are spaced apart from each other in the extension direction of the main body of the shielding element. In this way, electromagnetic isolation between high-voltage and low-voltage areas on the circuit board can be better achieved, electric field coupling can be reduced, and the EMC electromagnetic compatibility effect of the product can be improved. In addition, the shielding element is easier to manufacture and is not easily deformed.

[0013] In one embodiment, the free end of the spring body is provided with a bent portion, and the bent portion abuts against the housing. In this way, not only can a pressing force be provided between the shielding element and the housing to make the shielding element more stably installed in the electrical device, but also the product tolerance can be absorbed to further improve the product quality.

[0014] In one embodiment, the spring body extends obliquely from the main body of the shielding element to the top cover of the housing. In this way, deformation of the shielding element can be avoided and the EMC shielding effect can be improved.

[0015] In one embodiment, the shielding element further comprises a welding portion that contacts the circuit board surface and extends along the extension direction of the main body of the shielding element. In this way, the shielding element can be fixedly installed by welding, and a larger grounding area is provided, which is beneficial to reduce impedance and improve EMC shielding effect.

[0016] In one embodiment, the welding portion includes a first welding portion and a second welding portion, the first welding portion extends toward the second direction, and the second welding portion extends toward the first direction. By arranging the welding portions in opposite directions, the shielding element can be more stably installed.

[0017] In one embodiment, the first plug-in portion is arranged between the first welding portions, and the second plug-in portion is arranged between the second welding portions. This arrangement enables the pre-positioning and fixing of the shielding element to be performed in a stable state.

[0018] In one embodiment, the shielding element is an integrally formed stamping part. In this way, no additional connection steps are required in the manufacture of the shielding element, which simplifies the processing steps, thereby facilitating improved production efficiency and structural strength.

[0019] In one embodiment, the circuit board includes a first electronic component and a second electronic component, the electrical device includes a first area and a second area, the first electronic component is located in the first area, the second electronic component is located in the second area, and the shielding element is used to prevent electromagnetic interference between the first electronic component and the second electronic component. In this way, EMC shielding of high-voltage areas and low-voltage areas on the circuit board can be achieved.

[0020] The present disclosure also provides an electric drive assembly system, which includes the electric device as described above.

[0021] The present disclosure also provides a vehicle, which includes the electric drive assembly system as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The advantages and purposes of the present disclosure can be better understood from the preferred embodiments of the present disclosure described in detail below in conjunction with the accompanying drawings. In order to better show the relationship between the various components in the accompanying drawings, the accompanying drawings are not drawn to scale. In the accompanying drawings:

[0023] Figure 1 A schematic diagram of an electrical device according to an embodiment of the present disclosure is shown;

[0024] Figure 2 Shown according to Figure 1 Schematic diagram of the interior of the electrical equipment;

[0025] Figure 3 A schematic diagram showing a shielding element of an electrical device according to an embodiment of the present disclosure is shown;

[0026] Figure 4 Shown according to Figure 3 A top view of a shielding element;

[0027] Figure 5 Shown according to Figure 3 a side view of a shielding element; and

[0028] Figure 6 A schematic diagram showing a plug-in portion of a shielding element of an electrical device according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in combination with the drawings of the specific embodiments of the present disclosure. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0030] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include", "comprise" or "have" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to the physical or mechanical connections or connections shown in the drawings, but may include connections or connections equivalent thereto, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] Below, see Figures 1 to 6 Embodiments of the present disclosure are described in detail.

[0032] In the electric drive assembly system of a vehicle according to an embodiment of the present disclosure, one or more electrical devices are provided, which can be installed at the front end of the vehicle together with the electric drive assembly system, or can be installed at the bottom of the vehicle body. The electrical device may include at least one of the following: a motor controller, an on-board charger (OBC), a direct current converter (DCDC), a power distributor (PDU), etc. The electrical device may include various electronic components.

[0033] like Figure 1 As shown, the electrical device according to an embodiment of the present disclosure includes: a housing 11 , a circuit board 10 , and a shielding element 1 .

[0034] The housing 11 forms a receiving space and includes a top cover 12 that can be used to close the receiving space.

[0035] The circuit board 10 is disposed in the housing 11, and a recess is disposed thereon. For example, the recess is a recessed opening or a through opening on the circuit board 10. For example, the circuit board 10 includes a first electronic component and a second electronic component, and the electrical device includes a first area 13 and a second area 14, the first electronic component is located in the first area 13, and the second electronic component is located in the second area 14. For example, the first electronic component includes various high-voltage components, and the second electronic component includes various low-voltage components.

[0036] The shielding element 1 is disposed on the circuit board 10 and abuts against the housing 11. For example, the shielding element 1 abuts against the top cover 12.

[0037] like Figure 3 As shown, the shielding element 1 includes a first plug-in portion 2 and a second plug-in portion 3 that can be inserted into corresponding recesses on the circuit board 10. The figure shows one first plug-in portion 2 and one second plug-in portion 3, but the present disclosure does not limit the number of the first plug-in portion 2 and the second plug-in portion 3. Figure 5 As shown, the first plug-in portion 2 has a deformable protrusion protruding in a first direction D1 transverse to the plug-in direction S1, and the second plug-in portion 3 has a deformable protrusion protruding in a second direction D2 opposite to the first direction D1. Figure 1 , Figure 3 and Figure 5 Arrows are used to schematically illustrate the plugging direction S1, the first direction D1 and the second direction D2, wherein the plugging direction S1 is, for example, perpendicular to the circuit board 10. The deformable protrusions of the first plug part 2 and the second plug part 3 are supported on the inner walls of the corresponding recesses on the circuit board 10.

[0038] The deformable protrusion of the plug-in portion can be interference-fitted with the circuit board, thereby achieving pre-positioning of the shielding element, simplifying the assembly process and reducing production costs. In addition, the protrusions facing in opposite directions make the pre-positioning of the shielding element more stable.

[0039] like Figure 6 As shown, the deformable protrusions 21, 31 extend along the plug-in direction S1 and both ends thereof are connected to the main body 20, 30 of the corresponding plug-in portion. For example, the connection between the deformable protrusions 21, 31 and the corresponding main body 20, 30 is a smooth transition portion with an arc. In this way, the deformable protrusion of the plug-in portion can be more firmly fitted with the circuit board, and the removal of the shielding element is also easy to achieve. In some examples, the first plug-in portion 2 and the second plug-in portion 3 can have the same form, such as Figure 6 As shown, in some other examples, the first plug-in portion 2 and the second plug-in portion 3 may have different forms from each other.

[0040] See again Figure 6 The deformable protrusions 21, 31 are stamped parts protruding from the main bodies 20, 30 of the corresponding plug-in parts. In this way, the protrusions do not need to be installed through additional connection steps, which simplifies the processing procedures, thereby facilitating the improvement of production efficiency and the improvement of structural strength.

[0041] like Figure 3 and 4 As shown, the shielding element 1 further comprises a plurality of spring plates 6, which abut against the housing 11 and are spaced apart from each other in the extension direction E1 of the main body 15 of the shielding element 1. For example, there may be four spring plates 6, and other numbers are also possible. Figure 2 As shown, the extension direction E1 of the shielding element 1 can be parallel to the length direction of the shell 11, and of course, the width direction is also possible. For example, multiple spring bodies 6 are spaced apart from each other by the cutout 7. By providing a spring body abutting the shell, the electromagnetic isolation between the high-voltage area and the low-voltage area on the circuit board can be better achieved, the electric field coupling can be reduced, and the EMC electromagnetic compatibility effect of the product can be improved. In addition, since the multiple spring bodies are spaced apart from each other, the shielding element is easier to manufacture and is not easy to deform.

[0042] like Figure 3 and 5 As shown, the free end of the spring body 6 is provided with a bent portion 8, as shown in FIG. Figure 1 As shown, the bent portion 8 abuts against the housing 11, for example, against the inner surface of the top cover 12 of the housing 11. In this way, not only can a pressing force be provided between the shielding element and the housing so that the shielding element can be more stably installed in the electrical device, but also the product tolerance can be absorbed, further improving the product quality. The cutouts 7 between the spring bodies 6 make it easier to form the bent portion 8, and the quality of the bent portion 8 is better.

[0043] like Figure 1 As shown, the spring body 6 extends obliquely from the main body 15 of the shielding element 1 to the top cover 12 of the housing 11. This oblique extension can avoid deformation of the shielding element, thereby improving the EMC shielding effect.

[0044] like Figures 3 to 5 As shown, the shielding element 1 also includes a welding portion that contacts the surface of the circuit board 10 and extends along the extension direction E1 of the main body 15 of the shielding element 1. Compared with the known solution of fastening with screws, the present disclosure can realize the fixed installation of the shielding element by welding, so that the shielding element and the circuit board can fit tightly, thereby increasing the contact area between the shielding element and the circuit board, thereby providing a larger grounding area for the shielding element, which is beneficial to reduce impedance and improve EMC shielding effect. For example, the welding portion includes a first welding portion 4 and a second welding portion 5, the first welding portion 4 extends toward the second direction D2, and the second welding portion 5 extends toward the first direction D1. With the welding portions arranged in opposite directions, the installation of the shielding element is more stable.

[0045] See again Figure 3 , the first plug-in portion 2 is arranged between the first welding portions 4, and the second plug-in portion 3 is arranged between the second welding portions 5. That is, the plug-in portions as the pre-positioning portions and the welding portions as the fixing portions can be arranged alternately. This makes it possible to reasonably arrange the pre-positioning portions and the fixing portions along the extension direction E1 of the main body 15 of the shielding element 1, so that the pre-positioning and fixing of the shielding element can be performed in a stable state.

[0046] For example, the shielding element 1 is an integrally formed stamping part. The shielding element 1 can be integrally stamped from sheet metal. In this way, no additional connection steps are required in the manufacture of the shielding element, which simplifies the processing steps, thereby facilitating improved production efficiency and improved structural strength.

[0047] For example, the material of the shielding element 1 can be a conductive metal, such as phosphor bronze. Phosphor bronze has good toughness, high relative conductivity, and good shielding effect on high and low voltage electric field coupling. In addition, the surface of the material of the shielding element 1 can be plated with nickel tin, which is conducive to improving the oxidation resistance and weldability of this product.

[0048] See again Figure 1 and 2 The shielding element 1 can be used to prevent electromagnetic interference between the first electronic component located in the first area 13 and the second electronic component located in the second area 14. In this way, EMC shielding of the high voltage area and the low voltage area on the circuit board can be achieved.

[0049] According to the division of the first area 13 and the second area 14, the shielding element 1 may have a bending portion, which is located between the spring pieces 6 or between the first welding portion 4 and the second welding portion 5. Figure 3 shown.

[0050] The electric drive assembly system according to an embodiment of the present disclosure may include the electrical device as described above. It should be understood that the electric drive assembly system of the present disclosure also has the advantages described above with respect to the electrical device.

[0051] A vehicle according to an embodiment of the present disclosure includes an electric drive assembly system as described above. The vehicle may be an electrified vehicle, such as a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), or a range extended electric vehicle (REEV). The vehicle may also be a hydrogen energy vehicle. It should be understood that the vehicle of the present disclosure also has the advantages described above with respect to electrical equipment.

[0052] In addition, the technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the utility model to achieve the purpose of the present disclosure.

Claims

1. An electrical device, characterized in that: The electrical equipment comprises: Housing (11); A circuit board (10) is arranged in the housing and has a recessed portion thereon; and A shielding element (1) is arranged on the circuit board (10) and abuts against the housing (11). The shielding element (1) comprises a first plug-in portion (2) and a second plug-in portion (3) which can be inserted into corresponding recesses on the circuit board (10), wherein the first plug-in portion (2) has a deformable protrusion protruding in a first direction (D1) transverse to the plug-in direction (S1), and the second plug-in portion (3) has a deformable protrusion protruding in a second direction (D2) opposite to the first direction (D1).

2. The electrical device according to claim 1, characterized in that The deformable protrusion extends along the plug-in direction (S1) and both ends thereof are connected to the main body of the corresponding plug-in portion.

3. The electrical device according to claim 1, characterized in that: The deformable protrusion is a stamped portion protruding from the body of the corresponding plug-in portion.

4. The electrical device according to claim 1, characterized in that: The shielding element (1) further comprises a plurality of spring sheet bodies (6), the spring sheet bodies abutting against the shell (11) and being spaced apart from each other in the extension direction (E1) of the main body of the shielding element (1).

5. The electrical device according to claim 4, characterized in that: The free end of the spring body (6) is provided with a bent portion (8), and the bent portion abuts against the shell (11).

6. The electrical device according to claim 4, characterized in that: The spring body (6) extends obliquely from the main body of the shielding element (1) to the top cover (12) of the shell (11).

7. The electrical device according to claim 1, characterized in that: The shielding element (1) further comprises a welding portion which is in surface contact with the circuit board (10) and extends along an extension direction (E1) of the main body of the shielding element (1).

8. The electrical device according to claim 7, characterized in that: The welding portion comprises a first welding portion (4) and a second welding portion (5), the first welding portion extends toward the second direction (D2), and the second welding portion (5) extends toward the first direction (D1).

9. The electrical device according to claim 8, characterized in that The first plug-in portion (2) is arranged between the first welding portions (4), and the second plug-in portion (3) is arranged between the second welding portions (5).

10. The electrical device according to claim 1, characterized in that The shielding element (1) is an integrally formed stamped part.

11. The electrical device according to claim 1, characterized in that: The circuit board (10) comprises a first electronic component and a second electronic component, the electrical device comprises a first area (13) and a second area (14), the first electronic component is located in the first area (13), the second electronic component is located in the second area (14), and the shielding element (1) is used to prevent electromagnetic interference between the first electronic component and the second electronic component.

12. An electric drive assembly system, characterized in that: The invention comprises the electrical device as claimed in any one of claims 1 to 11.

13. A vehicle, characterized in that: Comprising the electric drive assembly system as claimed in claim 12.

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