CN215897628U

CN215897628U - Heat conduction fixing device of electric vehicle motor controller field effect transistor

Info

Publication number: CN215897628U
Application number: CN202121862200.XU
Authority: CN
Inventors: 周网林
Original assignee: Wuxi Lvlian New Energy Technology Co ltd
Current assignee: Wuxi Lvlian Intelligent Technology Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-02-22
Anticipated expiration: 2031-08-10

Abstract

The utility model discloses a heat conduction fixing device of a field effect transistor of an electric vehicle motor controller, which comprises a shell, wherein a circuit board is arranged on the inner bottom surface of the shell, the upper surface of the circuit board is connected with the field effect transistor and a wiring, a radiating fin is arranged on the inner side wall of the shell, a spring piece is arranged above the circuit board, the spring piece is positioned on the inner side of the field effect transistor, the spring piece is U-shaped, the upper part of the spring piece is an arc-shaped surface, two ends of the lower part of the spring piece are both corrugated, and a slotted hole is formed in the top of the spring piece. According to the utility model, the field effect transistors in the row are extruded on the radiating fins under the elastic action of the spring pieces, so that the compression states of the field effect transistors are more consistent, and the mounting mode does not need screws, so that the mounting mode is very convenient and fast, and the looseness caused by thermal deformation of the plastic insulating sleeve in the traditional connection can not be generated.

Description

Heat conduction fixing device of electric vehicle motor controller field effect transistor

Technical Field

The utility model relates to the technical field of electric vehicle controllers, in particular to a heat conduction fixing device of a field effect transistor of an electric vehicle motor controller.

Background

The electric vehicle is a vehicle which takes a battery as an energy source, converts electric energy into mechanical energy through a controller, a motor and other components to move so as to control the current and change the speed. The controller is a core control device used for controlling the starting, running, advancing and retreating, speed and stopping of the motor of the electric vehicle and other electronic devices of the electric vehicle, and is equivalent to the brain of the electric vehicle. While the field effect transistor plays a crucial role in the controller. The mounting of the field effect transistor is also important.

The current common fixing mode of the field effect transistor is as follows: each field effect transistor uses a screw and a plastic insulating sleeve, the field effect transistor and the heat conducting aluminum strip are locked through the screw, and the defects of the field effect transistor are as follows:

1. too many mounting screws are needed, the mounting is complicated, and the cost is high.

2. Because the field effect transistor generates heat, the plastic insulating sleeve can generate a certain amount of deformation, and finally the screw is loosened, so that the heat dissipation effect of the field effect transistor is reduced, and the service life of the field effect transistor is finally influenced.

3. Since each field effect transistor is mounted separately, the uniformity is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a heat conduction fixing device of a field effect transistor of a motor controller of an electric vehicle.

In order to achieve the purpose, the utility model adopts the following technical scheme: the heat conduction fixing device of the field effect transistor of the motor controller of the electric vehicle comprises a shell, wherein a circuit board is arranged on the inner bottom surface of the shell, the upper surface of the circuit board is connected with the field effect transistor and a wiring, a radiating fin is arranged on the inner side wall of the shell, and a spring piece is arranged above the circuit board and positioned on the inner side of the field effect transistor;

the spring piece is U-shaped, the upper portion of the spring piece is an arc-shaped surface, the two ends of the lower portion of the spring piece are corrugated, and a slot hole is formed in the top of the spring piece.

As a further description of the above technical solution:

the field effect transistor is tightly attached to one side of the radiating fin far away from the shell.

As a further description of the above technical solution:

the lower side wall of the shell is provided with a mounting hole, the shell and the spring piece pass through the notch hole through screws, the end part of the shell extends into the mounting hole for threaded fixing, and the screws pass through the circuit board.

As a further description of the above technical solution:

a side groove is formed in the right side wall of the shell, and the wiring is downwards clamped into the inner side of the side groove.

As a further description of the above technical solution:

the radiating fin is made of an aluminum sheet.

As a further description of the above technical solution:

the front side and the rear side of the shell are provided with edge grooves.

The utility model has the following beneficial effects:

compared with the prior art, this electric motor car machine controller field effect transistor will become the field effect transistor who is listed as and crowd on the fin through the elastic action of spring leaf for field effect transistor's the state of compressing tightly is more unanimous, and this kind of mounting means need not use the screw, and is consequently very convenient, also can not produce the not hard up that plastic insulation cover thermal deformation leads to in traditional connection.

Drawings

FIG. 1 is a schematic structural diagram of a heat-conducting fixing device for a field effect transistor of a motor controller of an electric vehicle according to the present invention;

FIG. 2 is a top view of a heat conducting fixture for a field effect transistor of a motor controller of an electric vehicle according to the present invention;

FIG. 3 is a side view of a thermally conductive mounting arrangement for a field effect transistor of a motor controller of an electric vehicle in accordance with the present invention;

FIG. 4 is a bottom view of a thermally conductive fixture for a field effect transistor of a motor controller of an electric vehicle in accordance with the present invention;

FIG. 5 is a schematic view of a heat conducting fixture for field effect transistors of an electric vehicle motor controller according to the present invention with the housing removed;

FIG. 6 is a spring plate diagram of a heat conducting fixture for field effect transistors of a motor controller of an electric vehicle according to the present invention;

fig. 7 is an enlarged view of a portion a in fig. 6.

Illustration of the drawings:

1. a housing; 2. a heat sink; 3. a field effect transistor; 4. a spring plate; 5. a screw; 6. a ridge groove; 7. a circuit board; 8. wiring; 9. a side groove; 10. mounting holes; 11. a notch hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1-7, one embodiment of the present invention is provided: a heat conduction fixing device of a field effect transistor of a motor controller of an electric vehicle comprises a shell 1, wherein edge grooves 6 are formed in the front side and the rear side of the shell 1, a circuit board 7 is arranged on the inner bottom surface of the shell 1, a row of field effect transistors 3 and a group of wiring 8 are connected to the upper surface of the circuit board 7, a side groove 9 is formed in the right side wall of the shell 1, the upper side of the side groove 9 is open, the lower side of the side groove is arc-shaped, the surface skin of the wiring 8 can be prevented from being scratched, the wiring 8 is downwards clamped into the inner side of the side groove 9, a radiating fin 2 is arranged on the inner side wall of one long side of the shell 1, the radiating fin 2 is made of an aluminum sheet, the radiating effect is achieved, heat generated by the circuit board 7 and the field effect transistors 3 can be transmitted to the shell 1, the field effect transistors 3 are tightly attached to one side, far away from the shell 1, of the radiating fin 2, a spring piece 4 is arranged above the circuit board 7, and the heat can be radiated from the edge grooves 6 with increased area, the spring piece 4 is positioned at the inner side of the field effect transistor 3, one side of the spring piece is propped against one side of the field effect transistor 3, which is far away from the radiating fin 2, and the other side of the spring piece is propped against the inner wall of the long edge of the shell 1, which is not provided with one side of the radiating fin 2;

spring leaf 4 is the U type and upper portion is the arcwall face, and the both ends of spring leaf 4 lower part are the ripple shape, can play skid-proof effect, and the back of being convenient for pack into slides, and slotted hole 11 is seted up at the top of spring leaf 4, can penetrate screw 5 downwards from slotted hole 11.

The lower side wall of the shell 1 is provided with a mounting hole 10, the shell 1 and the spring piece 4 pass through the notch hole 11 through the screw 5 and enable the end part to extend into the mounting hole 10 for screw thread fixing, after the fixing, the field effect transistor 3 is tightly pressed to the radiating fin 2 through the action of the spring piece 4, and the screw 5 passes through the circuit board 7.

Example two:

the difference from the first embodiment is that: the upper surface of the circuit board 7 is connected with two columns of field effect transistors 3, the inner side wall of the long edge of the shell 1 is provided with radiating fins 2, and the spring piece 4 is positioned between the two columns of field effect transistors 3.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. Electric motor car machine controller field effect transistor's heat conduction fixing device, including shell (1), its characterized in that: a circuit board (7) is arranged on the inner bottom surface of the shell (1), the upper surface of the circuit board (7) is connected with a field effect transistor (3) and a wiring (8), a radiating fin (2) is arranged on the inner side wall of the shell (1), a spring piece (4) is arranged above the circuit board (7), and the spring piece (4) is located on the inner side of the field effect transistor (3);

the spring piece (4) is U-shaped, the upper portion of the spring piece is an arc-shaped surface, the two ends of the lower portion of the spring piece (4) are corrugated, and a notch hole (11) is formed in the top of the spring piece (4).

2. The heat conducting fixture of electric vehicle motor controller field effect transistor of claim 1, wherein: the field effect transistor (3) is tightly attached to one side of the radiating fin (2) far away from the shell (1).

3. The heat conducting fixture of electric vehicle motor controller field effect transistor of claim 1, wherein: the lower side wall of the shell (1) is provided with a mounting hole (10), the shell (1) and the spring piece (4) penetrate through the notch hole (11) through a screw (5) and enable the end to extend into the mounting hole (10) for threaded fixing, and the screw (5) penetrates through the circuit board (7).

4. The heat conducting fixture of electric vehicle motor controller field effect transistor of claim 1, wherein: side groove (9) have been seted up to the right side wall of shell (1), wiring (8) are gone into the inboard of side groove (9) downwards.

5. The heat conducting fixture of electric vehicle motor controller field effect transistor of claim 1, wherein: the radiating fins (2) are made of aluminum sheets.

6. The heat conducting fixture of electric vehicle motor controller field effect transistor of claim 1, wherein: the front side and the rear side of the shell (1) are provided with edge grooves (6).