CN-224218646-U - Power device fixing structure of vehicle-mounted OBC

Abstract

The utility model relates to a power device fixing structure of a vehicle-mounted OBC. The utility model provides a power device fixed knot of on-vehicle OBC constructs, includes power device and potsherd in being fixed in the casing, the casing includes casing one portion and casing two parts, the relative both sides of potsherd first direction all are equipped with the heat conduction adhesive linkage, the potsherd both sides pass through the heat conduction adhesive linkage respectively with casing two portions and power device contact, casing one portion department is equipped with the fixing base, the fixing base includes the fixed part fixed with casing one portion, follows the elasticity portion that the second direction extends, the fixed part is equipped with the constant head tank, when power device, potsherd and casing are fixed, one side of power device first direction with elasticity portion is connected, the opposite side of power device first direction pass through the heat conduction adhesive linkage with the potsherd is connected. The utility model has the advantages of more convenient assembly, lower production cost and convenient realization of light weight and small size.

Inventors

• LI RUIZHI
• LIU HUI
• ZHANG BEIYANG
• ZHOU HANG
• Liao Hengzhong
• YAO JIALIN
• YANG LIANG
• LU LINGPING

Assignees

• 铁城信息科技有限公司

Dates

Publication Date

20260508

Application Date

20250523

Priority Date

20250520

Claims (7)

1. 1. The utility model provides a power device fixed knot of on-vehicle OBC constructs, includes power device and ceramic wafer that is fixed in the casing, its characterized in that the casing includes the casing one portion that is located power device and ceramic wafer first direction and the casing two portions that are located power device and ceramic wafer second direction, the opposite both sides of ceramic wafer first direction all are equipped with the heat conduction adhesive linkage, the ceramic wafer both sides respectively with casing two portions and power device contact through the heat conduction adhesive linkage, casing one portion department is equipped with the fixing base, the fixing base includes the fixed part of fixing with casing one portion, the elastic part that extends along the second direction, fixed part is kept away from casing one portion department and is equipped with the constant head tank that is used for fixing a position power device, when power device, ceramic wafer and casing are fixed, one side of power device first direction is connected with the elastic part, the opposite side of power device first direction is connected with the ceramic wafer through the heat conduction adhesive linkage.
2. 2. The structure of claim 1, wherein the elastic portion is in a shape of a sheet, and a root of the elastic portion is fixedly connected to a side wall of the fixing portion in a first direction.
3. 3. The structure of claim 2, wherein the root of the elastic portion has a smaller width than the root of the elastic portion, and the root of the elastic portion has a through hole extending in the first direction.
4. 4. The structure of claim 1, 2 or 3, wherein the surface of the end of the elastic portion in the first direction is in contact with the surface in the second direction and is provided with a guiding slope or a rounding/chamfering process.
5. 5. The structure of claim 1, 2 or 3, wherein the surface of the fixing portion, which contacts with the power device, has a positioning surface, and the positioning surface extends from the elastic portion side to the ceramic plate side gradually toward the end portion side away from the elastic portion.
6. 6. The structure of claim 1, 2 or 3, wherein the fixing portion of the fixing base has at least two extending sections arranged side by side and extending along the second direction, the extending direction of the extending sections is the same as the extending direction of the elastic portion, and the positioning groove is formed between two adjacent extending sections, the fixing portion and the elastic portion.
7. 7. The structure for fixing the power device of the on-board OBC of claim 1, 2 or 3, wherein a positioning hole and a positioning column are arranged between the two parts of the shell and the fixing part, and the positioning hole and the positioning column extend along the second direction.

Description

Power device fixing structure of vehicle-mounted OBC Technical Field The utility model relates to a power device fixing structure of a vehicle-mounted OBC. Background The China patent with the application number 202021222364.1 discloses a power device assembly structure and a vehicle-mounted charger, which comprises a shell with an opening at one end, a fixing support is fixedly arranged in the shell, a plurality of power devices are arranged in the fixing support and supported and positioned through the fixing support, the vehicle-mounted charger further comprises a circuit board buckled on the opening of the shell, pins of the power devices extend out of the circuit board and are respectively connected and fixed with the circuit board, a heat conducting component is arranged in the shell and is attached to the heat conducting component, the heat conducting component comprises a ceramic sheet attached to a position where a cooling water channel is arranged on the shell, and the vehicle-mounted charger further comprises an elastic pressing sheet, and the elastic pressing sheet is fixed through a fastening screw. In the scheme, the fixing support is mainly forced by the elastic pressing sheet, so that the power device on the fixing support is pressed on the ceramic sheet, the positioning of the power device is realized, and the welding of the pins of the subsequent power device and the circuit board is facilitated. The elastic pressing sheet occupies a large space for positioning and fixing the elastic pressing sheet, which is not beneficial to the weight reduction and miniaturization of the vehicle-mounted OBC and the whole vehicle. The power device that on-vehicle OBC inside set up is more, and the installation one by one of elastic pressing piece is comparatively troublesome, can lead to the production time longer, if with a plurality of elastic pressing pieces sitting together (i.e. elastic pressing strip), then need set up the correction location of the setting position of pressing strip fixing base in order to guarantee elastic pressing strip, leads to spare part further increase, and elastic pressing strip structure is comparatively complicated. Meanwhile, the lateral pressing force of the elastic pressing sheet to the power device is difficult to control, the power device is subjected to large mechanical stress and difficult to control, and the service life of the power device is influenced. Disclosure of utility model The utility model aims to provide a power device fixing structure of a vehicle-mounted OBC, which is more convenient to assemble, has lower production cost and is convenient to realize light weight and small size. The power device fixing structure of the vehicle-mounted OBC comprises a power device and a ceramic plate, wherein the power device and the ceramic plate are fixed in a shell, the shell comprises a first shell part positioned in the first direction of the power device and the ceramic plate and a second shell part positioned in the second direction of the power device and the ceramic plate, heat conducting bonding layers are arranged on two opposite sides of the first ceramic plate in the first direction, two sides of the ceramic plate are respectively contacted with the second shell part and the power device through the heat conducting bonding layers, a fixing seat is arranged at one part of the shell, the fixing seat comprises a fixing part fixed with the first shell part and an elastic part extending along the second direction, a positioning groove used for positioning the power device is formed at one part of the fixing part far away from the shell, and when the power device, the ceramic plate and the shell are fixed, one side of the first power device is connected with the elastic part, and the other side of the first power device is connected with the ceramic plate through the heat conducting bonding layers. When the power device is required to be fixed, the heat-conducting adhesive layers are paved or smeared on the two sides of the ceramic sheet, the ceramic sheet is adhered to one part of the shell, the fixing seat is placed on the two parts of the shell, the relative position between the fixing seat and the two parts of the shell is determined through a tool or other structures, the power device is plugged into a yielding groove of the fixing seat, one surface of the power device is abutted against the elastic part of the fixing seat, the other surface of the power device is contacted with the heat-conducting adhesive layers on the ceramic sheet, the fixing seat is subjected to force application by standing for a period of time or by adopting the tool, the relevant tool is removed after the heat-conducting adhesive layers are solidified, the welding of the circuit board and pins of the power device is carried out, and finally the fixing of the circuit board is carried out. In the assembling process of the power device, the elastic pressing piece or the elastic pressi