Oil-resistant processing electronic oil pump controller circuit board and oil-resistant processing tool

Abstract

According to the oil-resistant processing electronic oil pump controller circuit board and the oil-resistant processing tool provided by the utility model, at least one through hole is correspondingly arranged below the installation gap formed by the installation of the non-oil-resistant component and the circuit board body; and the oil-resistant dielectric layer is arranged to be coated on the surface of the non-oil-resistant component and the front surface of the circuit board body to surround a surrounding area of the non-oil-resistant component, so that suction force can be applied to the through hole on the back surface of the circuit board body; parts of the oil-resistant dielectric layer on the surface of the non-oil-resistant component and in the surrounding area are sucked into the installation gap and the through hole, so that the effect that the oil-resistant dielectric layer completely wraps the non-oil-resistant component is achieved, and the defect that the bottom of the component cannot be covered by a traditional local gluing process is overcome. Compared with an existing overall glue pouring scheme and an existing box dam glue pouring scheme, the cost is greatly reduced, and the problem that an existing electronic oil pump controller circuit board is high in oil resistance treatment cost or poor in oil resistance effect is solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of PCBA coating process technology, and particularly relates to an oil-resistant electronic oil pump controller circuit board and an oil-resistant treatment tooling. Background Technology

[0002] With the increasing demands for performance, reduced energy consumption and emissions, and enhanced vehicle comfort and reliability in automotive engines, the replacement of traditional mechanical oil pumps with electronic oil pumps has become an important direction in automotive engine technology development. Mechanical oil pumps rely on the engine's operation to generate pressure through the rotation of gears or vanes, thereby achieving the circulation of lubricating oil. The efficiency of mechanical oil pumps is limited by their structure and working principle, typically resulting in lower efficiency and higher energy consumption. Mechanical oil pumps also have relatively slow response times, unable to quickly adapt to changes in engine operating conditions. Furthermore, the control precision of mechanical oil pumps is lower, making it difficult to meet the demands of modern automobiles for precise control of lubricating oil pressure and flow.

[0003] To overcome these shortcomings, the automotive electronic oil pump was developed. Driven by an electric motor, the electronic oil pump uses an electronic control system to achieve precise pressure and flow regulation. The electronic oil pump operates more efficiently, adjusting the pump volume and pressure according to the engine's actual needs, reducing energy waste. While responding quickly to changes in engine operating conditions, the electronic oil pump also possesses higher control precision, enabling accurate regulation of lubricating oil pressure and flow, ensuring effective lubrication of the engine under various operating conditions.

[0004] An automotive electronic fuel pump typically consists of four main parts: a motor, a pump body, a flow channel, and a controller. The controller is usually integrated inside the fuel pump assembly, posing a risk of exposure to the oil environment. Therefore, protective measures are needed for the oil-sensitive electronic components on the controller's circuit board.

[0005] The common oil-resistant treatment processes and their drawbacks for existing electronic oil pump controller circuit boards in the industry are as follows:

[0006] Overall potting of circuit boards: The large amount of potting compound increases costs and adds weight, which does not conform to the design concept of lightweight automobiles.

[0007] Enclosure injection treatment: High cost, low efficiency, and unsuitable for mass production;

[0008] Localized glue treatment for oil-sensitive components: The gap between the oil-sensitive component and the PCB board cannot be filled with glue to form a cavity. When the oil plug on the PCB ages (there is a through-hole under the component), or when the PCB substrate ages due to oil immersion, the oil seeps into the bottom of the component from the gap of the PCB substrate layer, causing the component to corrode. Utility Model Content

[0009] The technical problem to be solved by this utility model is to provide an oil-resistant electronic oil pump controller circuit board and an oil-resistant treatment tooling, so as to solve the problems of high oil resistance cost or poor oil resistance effect of existing electronic oil pump controller circuit boards.

[0010] To solve the above problems, the technical solution of this utility model is as follows:

[0011] This utility model provides an oil-resistant electronic oil pump controller circuit board, which includes a circuit board body, at least one non-oil-resistant component, and an oil-resistant dielectric layer corresponding to the component.

[0012] The oil-sensitive component is mounted on the circuit board body, and a mounting gap is formed between the bottom of the oil-sensitive component and the circuit board body; and the circuit board body is provided with at least one through hole corresponding to the oil-sensitive component, and the two ends of the through hole are respectively connected to the mounting gap and the back of the circuit board body.

[0013] The oil-resistant dielectric layer is coated on the non-oil-resistant component and the surrounding area of ​​the circuit board body on the front side of the non-oil-resistant component, and at least a portion of the oil-resistant dielectric layer is configured to fill the mounting gap and enter the through hole under the action of suction force at the through hole.

[0014] In the electronic oil pump controller circuit board of this utility model, the sum of the cross-sectional areas of the through holes corresponding to the oil-sensitive components is A, and the projected area of ​​the oil-sensitive components on the circuit board body is B, where 0.01≤A / B≤0.1.

[0015] In the electronic oil pump controller circuit board of this utility model, the diameter of each through hole is greater than or equal to 0.1 mm.

[0016] In the electronic oil pump controller circuit board of this utility model, the width of the surrounding area is C, and the length of the line segment formed by the two farthest endpoints on the projected edge formed by the oil-resistant components is D, where C≥1.5D.

[0017] The electronic oil pump controller circuit board of this utility model has an oil-resistant medium layer made of oil-resistant adhesive, thermally conductive adhesive, or structural adhesive.

[0018] In the electronic oil pump controller circuit board of this utility model, the oil-sensitive components are soldered to the circuit board body.

[0019] This utility model provides an oil-resistant treatment tooling for an electronic oil pump controller circuit board used in any of the above-mentioned oil-resistant treatments, comprising a suction housing and a suction pipeline.

[0020] The suction shell is provided with a suction port for attaching to the back of the circuit board body, and the inner cavity of the suction shell is connected to an external negative pressure source through a suction tube.

[0021] The oil-resistant treatment tool of this utility model has a flexible bonding layer at the suction port.

[0022] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0023] One embodiment of this utility model involves creating at least one through hole below the mounting gap formed between the oil-resistant component and the circuit board body. An oil-resistant dielectric layer is applied to the surface of the oil-resistant component and surrounds the front of the circuit board body in a region encircling the component. By applying suction to the through hole from the back of the circuit board body, a portion of the oil-resistant dielectric layer from the surface of the oil-resistant component and the surrounding region is drawn into the mounting gap and through hole. This achieves complete coverage of the oil-resistant component, overcoming the shortcomings of traditional partial gluing processes that cannot cover the bottom of the component. Furthermore, it significantly reduces costs compared to existing overall potting and dam-like potting methods, solving the problems of high oil resistance costs or poor oil resistance in existing electronic oil pump controller circuit boards. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the circuit board of the oil-resistant electronic oil pump controller of this utility model;

[0025] Figure 2 This is a cross-sectional view of the circuit board of the oil-resistant electronic oil pump controller of this utility model.

[0026] Figure 3 This is a partial enlarged view of the circuit board of the oil-resistant electronic oil pump controller of this utility model;

[0027] Figure 4 This is a schematic diagram of the oil-resistant treatment of the electronic oil pump controller circuit board of this utility model.

[0028] Explanation of reference numerals in the attached diagram: 1. Components not resistant to oil; 2. Circuit board body; 3. Mounting gap; 4. Through hole; 5. Oil-resistant dielectric layer; 6. Suction shell; 7. Suction pipeline. Detailed Implementation

[0029] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the oil-resistant electronic oil pump controller circuit board and oil-resistant treatment tooling proposed in this utility model. The advantages and features of this utility model will become clearer from the following description and claims.

[0030] Example 1

[0031] See Figures 1 to 4 In one embodiment, an oil-resistant electronic oil pump controller circuit board includes a circuit board body 2, at least one non-oil-resistant component 1, and an oil-resistant dielectric layer 5 corresponding to each component.

[0032] In this design, the oil-sensitive component 1 is mounted on the circuit board body 2 (specifically, the oil-sensitive component 1 and the circuit board body 2 can be connected by soldering), and a mounting gap 3 is formed between the bottom of the oil-sensitive component 1 and the circuit board body 2. The circuit board body 2 has at least one through hole 4 corresponding to the oil-sensitive component 1, with both ends of the through hole 4 connecting to the mounting gap 3 and the back of the circuit board body 2, respectively. An oil-resistant dielectric layer 5 is coated on the front of the oil-sensitive component 1 and the area surrounding the oil-sensitive component 1 on the circuit board body 2. At least a portion of the oil-resistant dielectric layer 5 is configured to fill the mounting gap 3 and enter the through hole 4 under the action of suction force.

[0033] This embodiment opens at least one through hole 4 below the mounting gap 3 formed by the non-oil-resistant component 1 and the circuit board body 2, and sets the oil-resistant dielectric layer 5 to be coated on the surface of the non-oil-resistant component 1 and the surrounding area of ​​the front of the circuit board body 2 around the non-oil-resistant component 1. Thus, by applying a suction force to the through hole 4 on the back of the circuit board body 2, part of the oil-resistant dielectric layer 5 on the surface of the non-oil-resistant component 1 and the surrounding area can be drawn into the mounting gap 3 and the through hole 4, thereby achieving the effect of the oil-resistant dielectric layer 5 completely covering the non-oil-resistant component 1. This overcomes the defect of traditional local glue application process that cannot cover the bottom of the component, and the cost is greatly reduced compared with the existing overall potting solution and dam potting solution. It also solves the problems of high cost or poor oil resistance of existing electronic oil pump controller circuit boards.

[0034] The specific structure of the electronic oil pump controller circuit board in this embodiment will be further described below:

[0035] In this embodiment, the sum of the cross-sectional areas of the through holes 4 corresponding to the oil-resistant component 1 (the cross-sectional area being the effective suction area of ​​the formed through hole 4) is A, and the projected area of ​​the oil-resistant component 1 on the circuit board body 2 is B, where 0.01 ≤ A / B ≤ 0.1, which can be adjusted according to different oil-resistant media. That is, for oil-resistant components 1 of different sizes, the cross-sectional area formed by the corresponding through holes 4 is different to ensure the suction effect and efficiency of the oil-resistant medium layer 5.

[0036] Furthermore, when the projected area of ​​the oil-sensitive component 1 on the circuit board body 2 is large, a number of through holes 4 with smaller apertures can be arranged in an array to ensure uniform absorption of the oil-resistant dielectric layer 5. When the oil-resistant dielectric layer 5 enters each through hole 4, it can be considered that the oil-sensitive component 1 is completely covered. For example, for an oil-sensitive component 1 with a square cross-section, four through holes 4 can be set and arranged in a 2x2 rectangular array, while if the cross-section is rectangular, it can be set as a 3x2 or other number of through holes in a rectangular array.

[0037] Furthermore, to ensure the negative pressure suction effect, the minimum size of the through hole 4 is limited, with the diameter of each through hole 4 being greater than or equal to 0.1 mm. However, for cost considerations, the diameter of the through hole is usually set to be greater than 0.2 mm to facilitate machining and to make it easier to apply negative pressure to the installation gap.

[0038] In this embodiment, in order to ensure complete coverage of the oil-sensitive component 1, the width of the surrounding area can be C, and the length of the line segment formed by the two farthest endpoints on the projection edge formed by the oil-sensitive component is D (that is, the length of the longest line segment formed by arbitrarily selecting two points on the projection edge of the oil-sensitive component is D), C≥1.5D.

[0039] In this embodiment, the oil-resistant medium layer 5 is made of professional oil-resistant adhesive, thermally conductive adhesive, or structural adhesive.

[0040] Example 2

[0041] This embodiment provides an oil-resistant treatment fixture based on the first embodiment described above, used for oil-resistant treatment of the electronic oil pump controller circuit board in the first embodiment. Specifically, the oil-resistant treatment fixture may include a suction shell 6 and a suction pipe 7. The suction shell 6 has a suction port for attaching to the back of the circuit board body 2, and the inner cavity of the suction shell 6 is connected to an external negative pressure source via the suction pipe 7. By attaching the suction port to the back of the circuit board body 2 and turning on the external negative pressure source, a negative pressure suction force can be applied to the through hole 4 in the suction port. The oil-resistant medium layer 5, applied to the non-oil-resistant component 1 and the surrounding area by a dispensing machine, can then be drawn into the mounting gap 3 and the through hole 4.

[0042] Furthermore, in order to prevent the suction shell 6 from damaging the back of the circuit board body 2, a flexible bonding layer can be provided at the suction port. By setting a flexible material to press against the back of the circuit board body 2, the sealing effect of the bonding position can be further improved while protecting the circuit board body 2, thereby improving the negative pressure suction effect.

[0043] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. An oil-resistant electronic oil pump controller circuit board, characterized in that, It includes a circuit board body, at least one non-oil-resistant component, and an oil-resistant dielectric layer corresponding to each component; The oil-sensitive component is mounted on the circuit board body, and a mounting gap is formed between the bottom of the oil-sensitive component and the circuit board body; and the circuit board body is provided with at least one through hole corresponding to the oil-sensitive component, and the two ends of the through hole are respectively connected to the mounting gap and the back of the circuit board body. The oil-resistant dielectric layer is coated on the non-oil-resistant component and the surrounding area of ​​the circuit board body on the front side of the non-oil-resistant component, and at least a portion of the oil-resistant dielectric layer is configured to fill the mounting gap and enter the through hole under the action of suction force at the through hole.

2. The electronic oil pump controller circuit board as described in claim 1, characterized in that, The sum of the cross-sectional areas of the through holes corresponding to the oil-sensitive components is A, and the projected area of ​​the oil-sensitive components on the circuit board body is B, where 0.01≤A / B≤0.

1.

3. The electronic oil pump controller circuit board as described in claim 1, characterized in that, The diameter of each of the aforementioned through holes is greater than or equal to 0.1 mm.

4. The electronic oil pump controller circuit board as described in claim 2, characterized in that, The width of the surrounding area is C, and the length of the line segment formed by the two farthest endpoints on the projected edge of the oil-resistant component is D, where C ≥ 1.5D.

5. The electronic oil pump controller circuit board as described in claim 1, characterized in that, The oil-resistant medium layer is made of oil-resistant adhesive, thermally conductive adhesive, or structural adhesive.

6. The electronic oil pump controller circuit board as described in claim 1, characterized in that, The oil-sensitive components are soldered to the circuit board body.

7. An oil-resistant treatment tool, characterized in that, An electronic oil pump controller circuit board for use with oil-resistant treatment as described in any one of claims 1 to 6, comprising a suction housing and a suction pipeline; The suction shell is provided with a suction port for attaching to the back of the circuit board body, and the inner cavity of the suction shell is connected to an external negative pressure source through a suction tube.

8. The oil-resistant treatment fixture as described in claim 7, characterized in that, A flexible adhesive layer is provided at the suction port.

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