Driving module of starter-generator for new energy automobile

Abstract

The utility model discloses a driving module of a starter-generator for a new energy automobile, which comprises a copper-based printed circuit board and a glass fiber printed circuit board, the upper surface of the copper-based printed circuit board is provided with a solder mask, and the upper surface of the copper-based printed circuit board is also provided with an anode copper bar welding surface, a common end welding surface and a cathode copper bar welding surface. A power supply anode copper bar is welded on the anode copper bar welding surface, and a power supply cathode copper bar is welded on the cathode copper bar welding surface; according to the application, the power MOSFET is used as a current control element, the copper bar is used as a structural member and plays roles of connection, support, conduction and heat dissipation, and the glass fiber circuit board is used as a carrier of a driving circuit and a protection circuit and is used as a bridge between a driving signal and the MOSFET, so that an original damaged driving module can be perfectly replaced, and the service life of the driving module is prolonged. In addition, the device has the advantages of being simple in structure and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of drive modules, and in particular relates to a drive module of an electric motor for a new energy vehicle. Background Art

[0002] In hybrid vehicles, there is a device called "inspired motor", which can consume the power of the power battery to output torque when assistance is needed, and can also generate electricity to charge the power battery when there is surplus power. Some of these motors will use three-phase brushless motors. For three-phase brushless motors, six drive modules are required. Among these motors, the power device that can realize winding current commutation is the drive module. The drive module has two functions; one is to supply the power from the power battery to the motor winding at the appropriate time and size when external work is needed, so as to generate a rotating magnetic field, thereby driving the rotor to rotate and output torque to the outside; the second is to feedback the kinetic energy generated by the winding caused by the rotation of the rotor and feed it back to the power battery for charging, so as to increase the cruising range and save energy.

[0003] The patent application number is 201010100493.8, which discloses a DC motor control drive module. The application can meet the use requirements of DC motor drive of various optoelectronic equipment stable tracking servo systems in the sea, land and air fields, and has the characteristics of no heat dissipation, no interference, no noise, low cost, small space occupation, fast dynamic response, stable performance, safety and reliability. In view of the above application and in combination with the prior art, the currently used drive modules mostly adopt IGBT technology, but it is easy to be damaged, and the original module is generally not available for replacement. Therefore, a drive module that can be used for replacement has appeared on the market. It is composed of 8 small and medium power MOSFET power tubes, which are combined together through a complex structural design to achieve a "half-bridge" function. Due to the unreasonable design of this module, its structure is relatively complex, and due to the insufficient selection of key components, its failure rate is also high. The motor assembly after replacing this module has a very short service life, and it often breaks down again in two or three months or even shorter. Therefore, it is not a perfect solution. For this reason, we propose a drive module for an inspired motor for new energy vehicles. Utility Model Content

[0004] The purpose of the utility model is to provide a driving module of an electric motor for a new energy vehicle to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a driving module of an electric motor for a new energy vehicle, comprising a copper-based printed circuit board and a glass fiber printed circuit board, the upper surface of the copper-based printed circuit board is provided with a solder resist layer, the upper surface of the copper-based printed circuit board is also provided with a positive copper bar welding surface, a common end welding surface and a negative copper bar welding surface, a positive copper bar of a power supply is welded on the welding surface of the positive copper bar, a negative copper bar of a power supply is welded on the welding surface of the negative copper bar, a common end copper bar is welded on the welding surface of the common end, an upper arm power tube is welded to the top of the positive copper bar of the power supply and the common end copper bar, and a lower arm power tube is welded to the top of the negative copper bar of the power supply and the common end copper bar.

[0006] Preferably, the upper arm power tubes include upper arm power tube 1, upper arm power tube 2 and upper arm power tube 3, and the upper arm power tubes are also welded and installed on the glass fiber printed circuit board.

[0007] Preferably, the lower arm power tubes include lower arm power tube 1, lower arm power tube 2 and lower arm power tube 3, and the lower arm power tubes are also welded and installed on a glass fiber printed circuit board.

[0008] Preferably, the power positive copper bar, the power negative copper bar and the common copper bar are all provided with an extension portion designed for connecting to an external circuit and which can be bent as required.

[0009] Preferably, the copper-based printed circuit board corresponds to the extended portion in the claim, and the solder resist layer is provided so that the bending portion of the extended portion of the copper busbar does not exceed the outer contour of the copper-based printed circuit board.

[0010] Preferably, the glass fiber printed circuit board has a built-in driving circuit, which includes upper arm driving circuit 1, upper arm driving circuit 2, upper arm driving circuit 3, lower arm driving circuit 1, lower arm driving circuit 2, and lower arm driving circuit 3; and also has a built-in protection circuit, which includes upper arm driving protection circuit 1, upper arm driving protection circuit 2, upper arm driving protection circuit 3, lower arm driving protection circuit 1, lower arm driving protection circuit 2, and lower arm driving protection circuit 3.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) The application adopts six high-power MOSFET tubes, in conjunction with drive and protection circuit boards, uses power MOSFET transistors as current control elements, uses copper busbars as structural parts, and plays the role of connection, support, conduction, and heat dissipation. It uses a copper-based circuit board as a base plate, and a glass fiber circuit board as a carrier of the drive circuit and the protection circuit, and as a bridge between the drive signal and the MOSFET transistor. It can perfectly replace the original damaged drive module. After being installed on the vehicle for trial use, the module fully achieves the function of the original module and can be replaced relatively conveniently. In addition, it also has the characteristics of simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the copper-based printed circuit board of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the copper-based printed circuit board and the glass fiber printed circuit board after welding and assembly;

[0016] Figure 4 This is a schematic diagram of the final structural form of the module after the copper busbar of the utility model is bent;

[0017] Figure 5 It is a schematic diagram of the circuit structure of the utility model;

[0018] In the figure: 25, upper arm drive circuit 1; 26, upper arm drive protection circuit 1; 27, lower arm drive circuit 1; 28, lower arm drive protection circuit 1; 29, upper arm power tube 1; 30, lower arm power tube 1; 31, upper arm drive circuit 2; 32, upper arm drive protection circuit 2; 33, lower arm drive circuit 2; 34, lower arm drive protection circuit 2; 35, upper arm power tube 2; 36, lower arm power tube 2; 37, upper arm drive circuit Three; 38. Upper arm drive protection circuit three; 39. Lower arm drive circuit three; 40. Lower arm drive protection circuit three; 41. Upper arm power tube three; 42. Lower arm power tube three; 50. Copper-based printed circuit board; 51. Positive copper busbar of power supply; 52. Negative copper busbar of power supply; 53. Common copper busbar; 54. Glass fiber printed circuit board; 60. Positive copper busbar welding surface; 61. Common terminal welding surface; 62. Negative copper busbar welding surface; 63. Solder resist layer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The utility model provides a technical solution: a driving module of an electric motor for a new energy vehicle, comprising a copper-based printed circuit board 50 and a glass fiber printed circuit board 54, wherein a solder resist layer 63 is arranged on the upper surface of the copper-based printed circuit board 50, and a positive copper bar welding surface 60, a common terminal welding surface 61 and a negative copper bar welding surface 62 are also arranged on the upper surface of the copper-based printed circuit board 50, a positive copper bar 51 of a power source is welded on the positive copper bar welding surface 60, a negative copper bar 52 of a power source is welded on the negative copper bar welding surface 62, and a common terminal copper bar 53 is welded on the common terminal welding surface 61 An upper arm power tube is welded and installed on the top of the positive copper busbar 51 of the power supply and the common copper busbar 53, and a lower arm power tube is welded and installed on the top of the negative copper busbar 52 of the power supply and the common copper busbar 53, wherein the upper arm power tube and the lower arm power tube each use three power MOSFET transistors in parallel, and each power MOSFET transistor has a set of driving circuit and protection circuit, wherein the upper arm power tube shares one driving signal, and the lower arm power tube shares another driving signal, and the power tube is a high-power MOSFET tube with model HYG018N10NS1B6.

[0022] Specifically, the upper arm power tube includes an upper arm power tube 1 29, an upper arm power tube 2 35 and an upper arm power tube 3 41, and the upper arm power tube is also welded and installed on the glass fiber printed circuit board 54, the lower arm power tube includes a lower arm power tube 1 30, a lower arm power tube 2 36 and a lower arm power tube 3 42, and the lower arm power tube is also welded and installed on the glass fiber printed circuit board 54, the positive power copper bus 51, the negative power copper bus 52 and the common end copper bus 53 are all provided with an extension part designed for connecting an external circuit and can be bent as needed, the copper-based printed circuit board 50 corresponds to the extension part in the claims, and the solder resist layer 63 is set so that the bending part of the copper bus extension part does not exceed the outer contour of the copper-based printed circuit board 50, and there is no solder resist layer 63 on the bottom of the copper-based printed circuit board 50, which is designed to weld the base plate to the heat dissipation element, or to be crimped to the heat dissipation element with thermal grease or a thermal insulating sheet.

[0023] Specifically, the glass fiber printed circuit board 54 has a built-in driving circuit, and the driving circuit includes an upper arm driving circuit 1 25, an upper arm driving circuit 2 31, an upper arm driving circuit 3 37, a lower arm driving circuit 1 27, a lower arm driving circuit 2 33, and a lower arm driving circuit 3 39. It also has a built-in protection circuit, and the protection circuit includes an upper arm driving protection circuit 1 26, an upper arm driving protection circuit 2 32, an upper arm driving protection circuit 3 38, a lower arm driving protection circuit 1 28, a lower arm driving protection circuit 2 34, and a lower arm driving protection circuit 3 40. By using the glass fiber printed circuit board 54 as a carrier of the driving circuit and the protection circuit, and thus as a bridge between the driving signal and the MOSFET transistor, the driving circuit and protection circuit of the three power MOSFET transistors of the upper arm, and the driving circuit and protection circuit of the three power MOSFET transistors of the lower arm are all designed in this circuit board. At the same time, a corresponding number of pads are designed on the glass fiber printed circuit board 54, and some of these pads are used to connect the driving signal from the control unit, and the other part is used to connect the power MOSFET transistor.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A driving module for an electric motor for a new energy vehicle, characterized in that: The invention comprises a copper-based printed circuit board (50) and a glass fiber printed circuit board (54), wherein the upper surface of the copper-based printed circuit board (50) is provided with a solder resist layer (63), and the upper surface of the copper-based printed circuit board (50) is also provided with a positive copper bar welding surface (60), a common terminal welding surface (61) and a negative copper bar welding surface (62); a positive copper bar (51) of a power supply is welded on the positive copper bar welding surface (60), a negative copper bar (52) of a power supply is welded on the negative copper bar welding surface (62), a common terminal copper bar (53) is welded on the common terminal welding surface (61), an upper arm power tube is welded to the top of the positive copper bar (51) of the power supply and the common terminal copper bar (53), and a lower arm power tube is welded to the top of the negative copper bar (52) of the power supply and the common terminal copper bar (53).

2. The driving module of the electric motor for new energy vehicles according to claim 1 is characterized in that: The upper arm power tubes include an upper arm power tube 1 (29), an upper arm power tube 2 (35) and an upper arm power tube 3 (41), and the upper arm power tubes are also welded and installed on a glass fiber printed circuit board (54).

3. The driving module of the electric motor for new energy vehicles according to claim 1 is characterized in that: The lower arm power tubes include lower arm power tube one (30), lower arm power tube two (36) and lower arm power tube three (42), and the lower arm power tubes are also welded and installed on a glass fiber printed circuit board (54).

4. The driving module of the electric motor for new energy vehicles according to claim 1 is characterized in that: The power positive copper bar (51), the power negative copper bar (52) and the common copper bar (53) are all provided with an extension part designed for connecting to an external circuit and capable of being bent as required.

5. The driving module of the electric motor for new energy vehicles according to claim 4 is characterized in that: The copper-based printed circuit board (50) corresponds to the extended portion in the claim, and the solder resist layer (63) is provided so that the bending part of the extended portion of the copper busbar does not exceed the outer contour of the copper-based printed circuit board (50).

6. The driving module of the electric motor for new energy vehicles according to claim 1 is characterized in that: The fiberglass printed circuit board (54) has a built-in drive circuit, which includes an upper arm drive circuit one (25), an upper arm drive circuit two (31), an upper arm drive circuit three (37), a lower arm drive circuit one (27), a lower arm drive circuit two (33), and a lower arm drive circuit three (39). It also has a built-in protection circuit, which includes an upper arm drive protection circuit one (26), an upper arm drive protection circuit two (32), an upper arm drive protection circuit three (38), a lower arm drive protection circuit one (28), a lower arm drive protection circuit two (34), and a lower arm drive protection circuit three (40).

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