CN219227946U

CN219227946U - PCBA structure of redundant electric power steering system controller

Info

Publication number: CN219227946U
Application number: CN202222765104.4U
Authority: CN
Inventors: 王焘; 吴夏青; 汪兵兵; 邢锦鹏; 陆劲锋; 陈海明; 管金炜; 钱结苗; 叶扬波
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: 2023-06-20
Anticipated expiration: 2032-10-20

Abstract

The utility model relates to the technical field of electric power steering systems, in particular to a PCBA structure of a redundant electric power steering system controller, which comprises a power board, a logic control board and a bendable PCB, wherein the logic control board is placed in parallel with the power board, the logic control board is connected with the power board by adopting the bendable PCB, a gong groove structure is arranged in a bending area of the bendable PCB, and a first PCB at the bottom of the gong groove structure is electrically connected with a second PCB at two sides. Compared with the prior art, the PCBA structure of the redundant electric power steering system controller is designed, and the power board and the control board are separated and installed in the controller in parallel through the arrangement of the bendable PCB, so that the size of the controller is reduced, and the redundant electric power steering system controller is convenient to apply to the whole vehicle. The bending area only reserves two layers of PCB boards, so that the connection and conduction functions of the circuit can be ensured, and the thickness is reduced so as to be convenient to bend.

Description

PCBA structure of redundant electric power steering system controller

Technical Field

The utility model relates to the technical field of electric power steering systems, in particular to a PCBA structure of a redundant electric power steering system controller.

Background

The EPS is an automobile power steering system which provides auxiliary torque by means of a motor, and compared with the traditional hydraulic steering, the EPS has the advantages of low oil consumption, good steering hand feeling, adjustable power assisting software, small size, simple production and assembly, short development period and the like, and is the first choice of the current automobile steering scheme.

The electric power steering system EPS mainly comprises a torque sensor, an electric control unit ECU, a motor, a speed reducer and the like, wherein the electric control unit ECU is a brain of the whole system, and all signals are sent to corresponding units after being calculated and processed by the electric control unit ECU so as to control the steering of the whole vehicle.

In an electronic control unit ECU of a conventional electric power steering system EPS, a hardware circuit has no backup design, so that the steering system is low in safety level of configuration functions, the failure rate can reach about 500fit, namely about 500 times of sudden power failure loss occurs when about 1000 sets of steering systems are operated for 1 hour, and the steering system is only suitable for L0 and L1 level intelligent driving and cannot meet the requirements of L2 and higher level intelligent driving.

In order to meet the requirement of low failure rate of L3-level intelligent driving, the controller of the electronic control unit ECU needs to be subjected to redundancy design, the number of 12V power connectors, whole vehicle communication connectors and hardware circuits in the redundant controller is doubled, the motor is changed from 3 phases to 6 phases, the size of the PCBA is almost 1 time larger, and the size of the corresponding electronic control unit ECU is synchronously increased.

Generally, intelligent driving vehicles meeting the L3 and above grade are often medium-high end vehicles, an electric power steering system of the intelligent driving vehicles is placed on an automobile chassis instead of a cockpit, the layout space of the chassis is smaller, the size of a motor controller is 1 time larger, and the intelligent driving vehicles are difficult to put in, so that the intelligent driving vehicles are also the difficulty in designing redundant electric power steering systems in the current industry. The PCBA is the core of the whole electronic control unit ECU controller, and the size of the PCBA directly determines the size of the controller.

Therefore, there is a need to design a PCBA structure for a redundant electric power steering system controller that makes the layout of the PCBA more compact, thereby reducing the size of the controller for ease of application on the whole vehicle.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a PCBA structure of a redundant electric power steering system controller, which enables the layout of the PCBA to be more compact, thereby reducing the size of the controller and being convenient for being applied to the whole vehicle.

In order to achieve the above purpose, the utility model provides a PCBA structure of a redundant electric power steering system controller, which comprises a power board, a logic control board and a bendable PCB, wherein the logic control board is arranged in parallel with the power board, the logic control board is connected with the power board by adopting the bendable PCB, a bending area of the bendable PCB is provided with a gong groove structure, and a first PCB at the bottom of the gong groove structure is electrically connected with a second PCB at two sides.

The power board is fixed on the controller.

The bendable PCB is a semi-flexible circuit board or a bendable PCB hard board.

The logic control board, the power board and the PCB II are six-layer PCB.

The first PCB is a two-layer PCB.

The logic control board is provided with a microprocessor chip MCU, a chip power supply module SBC, a MOS control chip module GDU and a whole vehicle communication CAN module.

The power board is provided with a power MOS field effect transistor, a 12V power input module and an LC filtering processing module.

Compared with the prior art, the PCBA structure of the redundant electric power steering system controller is designed, and the power board and the control board are separated and installed in the controller in parallel through the arrangement of the bendable PCB, so that the size of the controller is reduced, and the redundant electric power steering system controller is convenient to apply to the whole vehicle. The bending area only reserves two layers of PCB boards, so that the connection and conduction functions of the circuit can be ensured, and the thickness is reduced so as to be convenient to bend.

Drawings

Fig. 1 is an isometric view of a PCB board of the present utility model.

FIG. 2 is a schematic diagram of the present utility model mounted on a controller.

Fig. 3 is a tiled elevation view of the present utility model.

Fig. 4 is a tiled reverse view of the present utility model.

Fig. 5 is a schematic diagram of a laminated structure of a PCB board 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, 3-5, the utility model provides a PCBA structure of a redundant electric power steering system controller, which comprises a power board, a logic control board and a bendable PCB, wherein the logic control board 1 and the power board 2 are arranged in parallel, so that the space in the Y-axis direction can be fully utilized, and the area of the PCBA in the controller is reduced. The logic control board 1 is connected with the power board 2 through a bendable PCB 3, a bending area of the bendable PCB 3 is provided with a gong groove structure 31, and a first PCB 32 at the bottom of the gong groove structure 31 is electrically connected with a second PCB 33 at two sides. The gong groove structure 31 makes the bending area remain only in a relatively thin portion, so that the bending area becomes relatively soft, thereby realizing a bendable state.

Referring to fig. 2, the power board 2 is fixed to the controller 4.

The bendable PCB 3 is a semi-flexible circuit board or a bendable PCB hard board.

Referring to fig. 5, the logic control board 1, the power board 2, the PCB board two 33, and the PCB board two 33 are the same in board material and are all FR4. The logic control board 1, the power board 2 and the PCB II 33 are six layers of PCB boards, namely L1-L6, and the thickness is about 1.6 mm. The first PCB 32 is a two-layer PCB, namely L1-L2, and the thickness T is about 0.25mm, so that the connection and conduction functions of the two layers of circuits L1 and L2 are maintained, and the thickness is reduced so as to be convenient for realizing the bending function. The bendable PCB 3 is low in cost and high in yield.

The logic control board 1 is provided with a microprocessor chip MCU, a chip power supply module SBC, a MOS control chip module GDU and a whole vehicle communication CAN module. The power board 2 is provided with a power MOS field effect transistor, a 12V power input module and an LC filtering processing module. Therefore, the logic control board 1 and the power board 2 are spatially separated according to different module functions, mutual interference is prevented, EMC and signal quality performance are better, and the layout of internal components of the logic control board 1 and the power board 2 is more compact.

The hardware redundant circuit modules adopt symmetrical layout, so that the consistency of the same functional module PCB design among redundant systems can be ensured, and the basic principle of the redundant design principle is met.

The utility model designs the PCBA structure of the redundant electric power steering system controller, and the power board and the control board are separated and installed in the controller in parallel through the arrangement of the bendable PCB, so that the size of the controller is reduced, and the redundant electric power steering system controller is convenient to apply to the whole vehicle. The bending area only reserves two layers of PCB boards, so that the connection and conduction functions of the circuit can be ensured, and the thickness is reduced so as to be convenient to bend. The utility model has the characteristics of low cost and high yield, and has wide application prospect.

Claims

1. The utility model provides a PCBA structure of redundant electric power steering system controller, includes power board, logic control board, can bend PCB, its characterized in that: the logic control board (1) is placed in parallel with the power board (2), the logic control board (1) is connected with the power board (2) through a bendable PCB (3), a bending area of the bendable PCB (3) is provided with a gong groove structure (31), and a first PCB (32) at the bottom of the gong groove structure (31) is electrically connected with a second PCB (33) at two sides.

2. The PCBA structure of a redundant electric power steering system controller of claim 1, wherein: the power board (2) is fixed on the controller (4).

3. The PCBA structure of a redundant electric power steering system controller of claim 1, wherein: the bendable PCB (3) is a semi-flexible circuit board or a bendable PCB hard board.

4. The PCBA structure of a redundant electric power steering system controller of claim 1, wherein: the logic control board (1), the power board (2) and the PCB II (33) are six-layer PCB boards.

5. The PCBA structure of a redundant electric power steering system controller of claim 1, wherein: the first PCB (32) is a two-layer PCB.

6. The PCBA structure of a redundant electric power steering system controller of claim 1, wherein: the logic control board (1) is provided with a microprocessor chip MCU, a chip power supply module SBC, a MOS control chip module GDU and a whole vehicle communication CAN module.

7. The PCBA structure of a redundant electric power steering system controller of claim 1, wherein: the power board (2) is provided with a power MOS field effect transistor, a 12V power supply input module and an LC filtering processing module.