CN-122028397-A - Power supply shielding device and vehicle-mounted power supply

CN122028397ACN 122028397 ACN122028397 ACN 122028397ACN-122028397-A

Abstract

The application provides a power supply shielding device and a vehicle-mounted power supply, wherein the power supply shielding device comprises a shell, a shielding piece and a shielding cover, wherein the shell comprises a bottom plate and a plurality of side walls which are connected with each other, the bottom plate and the side walls form a containing space with an opening, the shielding piece is arranged in the containing space and connected with the bottom plate to divide the containing space into an isolation cavity and a plurality of shielding cavities, the shielding cover is arranged on the shielding piece to seal the isolation cavity, the isolation cavity is used for installing a power supply module, and the shielding piece and the shielding cover isolate the isolation cavity and the shielding cavity so as to prevent the power supply module from interfering devices in the shielding cavity. Through the mode, the power module is sealed in the isolation cavity through the shielding piece and the shielding cover, and electromagnetic interference of the power module to devices in the shielding cavity can be effectively avoided.

Inventors

FU YUE
HE ZHIJUN

Assignees

深圳麦格米特电气股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260306

Claims (10)

1. A power supply shielding device, characterized in that the power supply shielding device comprises: The shell comprises a bottom plate and a plurality of side walls which are connected with each other, wherein the bottom plate and the side walls form a containing space with an opening; The shielding piece is arranged in the accommodating space and connected with the bottom plate so as to divide the accommodating space into an isolation cavity and a plurality of shielding cavities; The shielding cover is arranged on the shielding piece to seal the isolation cavity, the isolation cavity is used for installing a power module, and the shielding piece is isolated from the shielding cover, so that the power module is prevented from interfering devices in the shielding cavity.
2. The power supply shielding device according to claim 1, wherein the shielding member includes two first baffles arranged in a first direction, and two second baffles arranged in a second direction, both ends of the first baffles being connected to the side wall, the second baffles being arranged between the first baffles and connected to the first baffles, both of the first baffles and the second baffles being connected to the bottom plate such that both of the first baffles and both of the second baffles form the isolated chamber; the first direction and the second direction are arranged at a preset angle and are not parallel.
3. The power supply shielding apparatus according to claim 2, wherein a distance of the shield case from the bottom plate is smaller than a distance of an end of the first shutter away from the bottom plate.
4. The power shielding device of claim 2, comprising a first circuit board coupled to the power module, the first circuit board being isolated from the power module via the shield and disposed against the base plate.
5. The power shielding device according to claim 4, wherein the shielding cover comprises a first flat plate and a second flat plate, the first flat plate and the second flat plate are connected by a straight plate, the first flat plate is arranged in a fitting manner with the power module, and the second flat plate is arranged in a fitting manner with the first circuit board; The first circuit board is provided with a transmission interface, and the transmission interface is positioned between the second flat plate and the bottom plate.
6. The power shielding device according to claim 5, wherein the shielding case further comprises a bending portion, the bending portions are disposed on the first flat plate and the second flat plate, and the bending portions are disposed perpendicular to the planes of the first flat plate and the second flat plate.
7. The power supply shielding device according to claim 2, further comprising a second circuit board disposed in the accommodation space; The shielding cavity comprises a first filtering cavity, a second filtering cavity and a third filtering cavity, the two first baffles and the side wall surround to form the first filtering cavity and the second filtering cavity, the two first baffles, the second baffles and the side wall surround to form the third filtering cavity, and the third filtering cavity is located between the first filtering cavity and the second filtering cavity and isolated by the first baffles; The second circuit board comprises a first filtering interface, a second filtering interface and a third filtering interface, and the first filtering cavity, the second filtering cavity and the third filtering cavity are respectively arranged correspondingly.
8. The power supply shielding device according to claim 7, wherein the shielding cavity further includes a fourth filter cavity, a fifth filter cavity, and a sixth filter cavity, the fourth filter cavity and the fifth filter cavity being located on opposite sides of the two first baffles, the fourth filter cavity being located adjacent to the first filter cavity, the fifth filter cavity being located adjacent to the second filter cavity, the sixth filter cavity being located between the fourth filter cavity and the fifth filter cavity and being located adjacent to the isolation cavity; The second circuit board is provided with an inductance component, a transformation component and an auxiliary power supply component, and the inductance component, the transformation component and the auxiliary power supply component are respectively arranged corresponding to the fourth filtering cavity, the fifth filtering cavity and the sixth filtering cavity.
9. The power supply shielding apparatus according to claim 7, wherein the housing includes a cover plate detachably connected to the side wall, the cover plate having an abutting portion formed thereon; and grounding spring pieces corresponding to each other are formed on the end surfaces of the two sides of the second circuit board, and the grounding spring pieces are in abutting connection with the shielding cover and the abutting part.
10. A vehicle-mounted power supply, characterized in that it comprises a power supply shielding device according to any one of claims 1-9.

Description

Power supply shielding device and vehicle-mounted power supply Technical Field The application is applied to the technical field of vehicle-mounted power supplies, and particularly relates to a power supply shielding device and a vehicle-mounted power supply. Background The new energy automobile on-vehicle two unification power comprises on-vehicle machine and direct current converter to be connected with a plurality of external interfaces, wherein, direct current converter and on-vehicle charge motor are the inside strong electromagnetic interference source that is close to a plurality of interfaces of on-vehicle power, and electromagnetic interference can transmit to a plurality of interfaces through the mode of the inside space electromagnetic field of on-vehicle power, thereby the interference to external interface is too big, in order to influence automobile EMC (Electromagnetic Compatibility ) performance. However, in the prior art, a plurality of shielding cases are adopted to shield the electromagnetic waves generated by the direct current converter in a mode of independently sealing a plurality of interfaces, etc., however, the mode has a complex structure and high production cost. Disclosure of Invention The application provides a power supply shielding device which is used for solving the problem that in the prior art, electromagnetic interference of a vehicle-mounted power supply to internal devices is too strong. In order to solve the technical problems, the application provides a power supply shielding device which comprises a shell, a shielding piece and a shielding cover, wherein the shell comprises a bottom plate and a plurality of side walls which are connected with each other, the bottom plate and the plurality of side walls form a containing space with an opening, the shielding piece is arranged in the containing space and connected with the bottom plate to divide the containing space into an isolation cavity and a plurality of shielding cavities, the shielding cover is arranged on the shielding piece to seal the isolation cavity, the isolation cavity is used for installing a power supply module, and the shielding piece and the shielding cover isolate the isolation cavity and the shielding cavity so as to prevent the power supply module from interfering devices in the shielding cavity. The shielding piece comprises two first baffles arranged along a first direction and two second baffles arranged along a second direction, wherein two ends of the first baffles are connected with the side wall, the second baffles are arranged between the first baffles and are connected with the first baffles, the first baffles and the second baffles are connected with the bottom plate, so that the two first baffles and the two second baffles form an isolation cavity, and the first direction and the second direction are arranged at a preset angle and are not parallel. Wherein, the distance of shield cover from the bottom plate is less than the distance of one end that the bottom plate was kept away from to first baffle from the bottom plate. The power supply shielding device comprises a first circuit board coupled with the power supply module, wherein the first circuit board is isolated from the power supply module through a shielding piece and is attached to the bottom plate. The shielding cover comprises a first flat plate and a second flat plate, the first flat plate is connected with the second flat plate through a straight plate, the first flat plate is attached to the power module, and the second flat plate is attached to the first circuit board; The first circuit board is provided with a transmission interface, and the transmission interface is positioned between the second plate and the bottom plate. The shielding cover further comprises a bending part, wherein the first flat plate and the second flat plate are respectively provided with the bending part, and the bending part is perpendicular to the planes of the first flat plate and the second flat plate. The power supply shielding device further comprises a second circuit board, the second circuit board is arranged in the accommodating space, the shielding cavity comprises a first filtering cavity, a second filtering cavity and a third filtering cavity, the two first baffles and the side wall surround to form the first filtering cavity and the second filtering cavity, the two first baffles, the second baffles and the side wall surround to form the third filtering cavity, the third filtering cavity is located between the first filtering cavity and the second filtering cavity and isolated through the first baffles, and the second circuit board comprises a first filtering interface, a second filtering interface and a third filtering interface which are arranged corresponding to the first filtering cavity, the second filtering cavity and the third filtering cavity respectively. The shielding cavity further comprises a fourth filtering cavity, a fifth