CN219205038U

CN219205038U - Electric power steering motor controller with dual redundant top surface heat dissipation

Info

Publication number: CN219205038U
Application number: CN202222764879.XU
Authority: CN
Inventors: 汪兵兵; 浦晓红; 王焘; 吴夏青; 管金炜
Original assignee: Bosch Huayu Steering Systems Co Ltd
Current assignee: Bosch Huayu Steering Systems Co Ltd
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2023-06-16
Anticipated expiration: 2032-10-20

Abstract

The utility model relates to an electric power steering motor controller with double redundant top surface heat dissipation, which comprises a PCBA bending plate, a heat sink, a power Pin needle, a support piece, an end cover and a connector, wherein the PCBA bending plate comprises a power plate, a logic plate and a flexible circuit board, the power plate is connected with the side surface of the logic plate by adopting the flexible circuit board, the power plate, the logic plate and the support piece are connected by adopting the power Pin needle, the bottom of a MOSFETS is connected with the power plate, and the top surface of the MOSFETS is connected with the heat sink by adopting heat dissipation glue. According to the utility model, the power board is separated from the logic board, the flexible circuit board is adopted for connection, the bottom of the high-power-consumption MOSFETS is connected with the power board, and the top surface of the high-power-consumption MOSFETS is connected with the heat sink through the heat dissipation glue, so that the heat transfer path is reduced, and the heat dissipation is accelerated. The connecting structure of the support piece, the end cover and the heat sink enhances the capability of the connector for bearing the plugging force and solves the problem of insufficient rigidity of the connector caused by the arrangement of the power board and the logic board.

Description

Electric power steering motor controller with dual redundant top surface heat dissipation

Technical Field

The utility model relates to the technical field of steering systems, in particular to an electric power steering motor controller with double redundant top surface heat dissipation.

Background

With the increasing market share of new energy automobiles, application technologies such as electromotive, sharing, intelligent, networking and the like rapidly develop, and automatic driving gradually becomes the core of large-scale development resources in recent years of large-scale host factories. For the automatic driving field, the safety is particularly important, and in some projects of EPS, the safety requirements given by a host factory customer are the highest level: ASIL D10 fit, 10 hundred million hours, 10 failures. To meet the safety requirements, a dual redundancy design is required for the electric booster controller.

For the PCB structure with double redundancy design, the number of MOSFETs on the same board is doubled, and the number of MOSFETs is only 20, so that the density of heating electronic components on the PCB is increased, and the heat flow density per unit area is increased.

The existing heat dissipation mode generally transfers heat to the PCB through the thermal via hole, and then transfers heat to the heat sink through the heat-conducting glue to dissipate heat, so that the temperature of the MOSFETS is easily raised too high in the heat dissipation mode, the heat dissipation requirement cannot be met, and the failure risk exists.

Therefore, it is desirable to design an electric power steering motor controller with dual redundant top surface heat dissipation to speed up heat dissipation.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides an electric power steering motor controller with double redundant top surface heat dissipation so as to accelerate heat dissipation.

In order to achieve the above purpose, the utility model provides an electric power steering motor controller with double redundant top surface heat dissipation, which comprises a PCBA bent plate, a heat sink, a power Pin needle, a supporting piece, an end cover and a connector, wherein a connecting column is arranged on the heat sink, the PCBA bent plate is arranged on the connecting column, the end cover is covered outside the PCBA bent plate, the supporting piece is covered in the end cover, the supporting piece is fixed with the top of the connecting column, the supporting piece is contacted with the bottom of the connector, the connector is arranged in a through hole of the end cover, the PCBA bent plate comprises a power plate, a logic plate and a flexible circuit board, the power plate is connected with the side surface of the logic plate by adopting the flexible circuit board, the power plate, the logic plate and the supporting piece are connected by adopting the power Pin needle, the bottom of a MOSFETS is connected with the power plate, and the top surface of the MOSFETS is connected with the heat sink by adopting heat dissipation glue.

The support piece and the connecting column are fixed by adopting screws.

The outer side of the connector is provided with error-proof fins.

The heat sink surface be provided with the boss, the coating of heat dissipation glue is on the surface of boss.

Compared with the prior art, the power board is separated from the logic board and is connected with the logic board by adopting the flexible circuit board, the bottom of the high-power-consumption MOSFETs is connected with the power board, and the top surface of the high-power-consumption MOSFETs is connected with the heat sink by adopting the heat dissipation glue, so that the heat transfer path is reduced, and the heat dissipation is accelerated. The connecting structure of the support piece, the end cover and the heat sink also enhances the capability of the connector to bear the plugging force, and solves the problem of insufficient rigidity of the connector caused by the arrangement of the power board and the logic board.

Drawings

Fig. 1 is an exploded view of the present utility model.

Fig. 2 is a schematic diagram of the connection of MOSFETS and power boards according to the present utility model.

Detailed Description

The utility model will now be further described with reference to the accompanying drawings.

Referring to fig. 1 and 2, the utility model provides an electric power steering motor controller with dual-redundancy top surface heat dissipation, which comprises a PCBA bent plate, a heat sink, a power Pin needle, a support piece, an end cover and a connector, wherein a connecting column 12 is arranged on the heat sink 8, the PCBA bent plate is arranged on the connecting column 12, the end cover 3 is covered outside the PCBA bent plate, the support piece 4 is covered in the end cover 3, the support piece 4 is fixed with the top of the connecting column 12, the support piece 4 is contacted with the bottom of the connector 1, the connector 1 is arranged in a through hole of the end cover 3, the PCBA bent plate comprises a power plate 7, a logic plate 6 and a flexible circuit board 9, the power plate 7 is connected with the side surface of the logic plate 6 by adopting the flexible circuit board 9, the power plate 7, the logic plate 6 and the support piece 4 are connected by adopting the power Pin needle 5, the bottom of the MOSFETS71 is connected with the power plate 7, and the top surface of the MOSFETS71 is connected with the heat sink 8 by adopting the heat dissipation glue 11.

In the utility model, the support 4 and the connecting column 12 are fixed by adopting screws.

The outside of the connector 1 is provided with an error-proof fin 2 to prevent assembly errors.

The surface of the heat sink 8 is provided with a boss, and the heat-dissipating glue 11 is coated on the surface of the boss, and the boss is only arranged at the position corresponding to the MOSFETS71, so that the overall weight of the electric power steering motor controller is reduced.

The utility model separates the logic board 6 from the power board 7, distributes the high-power consumption electronic component images such as MOSFETs and the like on the power board 7, and distributes the low-power consumption electronic component images such as MCU and SBC on the logic board 6. The logic board 6 and the power board 7 are conducted through copper wires in the PCB, feasibility of process assembly is considered, and the flexible circuit board 9 is adopted to achieve bending of the PCBA.

Due to the adoption of the design of the logic board 6 and the power board 7, the height of the power Pin needle 5 is increased, and the rigidity of the connector 1 is insufficient. In the utility model, the supporting piece 4 is made of aluminum alloy, the supporting piece 4 is coated in the end cover 3 and is fixed on the connecting column 12 of the heat sink 8 through the screw, so that the capability of the connector 1 for bearing the plugging force is enhanced.

In the utility model, the heat of the MOSFETs71 is transferred to the heat sink 8 through the heat dissipation glue 11 to dissipate heat, so that the heat transfer path is reduced, and the heat dissipation is quickened.

The power board and the logic board are separated, the flexible circuit board is adopted for connection, the bottom of the high-power-consumption MOSFETs is connected with the power board, and the top surface of the high-power-consumption MOSFETs is connected with the heat sink through the heat dissipation glue, so that the heat transfer path is reduced, and the heat dissipation is accelerated. The connecting structure of the support piece, the end cover and the heat sink also enhances the capability of the connector to bear the plugging force, and solves the problem of insufficient rigidity of the connector caused by the arrangement of the power board and the logic board.

Claims

1. The utility model provides an electric power steering motor controller with heat dissipation of dual redundancy top surface, includes PCBA curved plate, heat sink, power Pin needle, support piece, end cover, connector, its characterized in that: be equipped with spliced pole (12) on heat sink (8), PCBA bending plate installs on spliced pole (12), end cover (3) cover is outside PCBA bending plate, support piece (4) package is moulded in end cover (3), support piece (4) are fixed with the top of spliced pole (12), support piece (4) are contacted with the bottom of connector (1), connector (1) are installed in the through-hole of end cover (3), PCBA bending plate includes power board (7), logic board (6), flexible circuit board (9), power board (7) are connected with flexible circuit board (9) adoption in the side of logic board (6), power board (7), logic board (6), adopt power Pin needle (5) to be connected between support piece (4), the bottom of MOSFETS (71) is connected with power board (7), adopt heat dissipation glue (11) to be connected between the top surface of MOSFETS (71) and heat sink (8).

2. An electric power steering motor controller having dual redundant top surface heat dissipation as set forth in claim 1 wherein: the support piece (4) and the connecting column (12) are fixed by adopting screws.

3. An electric power steering motor controller having dual redundant top surface heat dissipation as set forth in claim 1 wherein: the outer side of the connector (1) is provided with an error-proof fin (2).

4. An electric power steering motor controller having dual redundant top surface heat dissipation as set forth in claim 1 wherein: the surface of the heat sink (8) is provided with a boss, and the heat dissipation glue (11) is coated on the surface of the boss.