CN113382601B

CN113382601B - 48V BSG motor integrated inverter

Info

Publication number: CN113382601B
Application number: CN202110614727.9A
Authority: CN
Inventors: 郭慧; 倪鹏; 韩振
Original assignee: Prestolite Electric Weifang Ltd
Current assignee: Prestolite Electric Weifang Ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2022-08-16
Anticipated expiration: 2041-06-02
Also published as: CN113382601A

Abstract

The invention discloses a 48V BSG motor integrated inverter which comprises a heat dissipation plate, wherein the upper end surface of the heat dissipation plate is a bearing surface, the lower end surface of the heat dissipation plate is an assembly surface, a capacitor module mounting groove is formed in the middle of the bearing surface, two output screw rod abdicating holes are formed in front of one end of the capacitor module mounting groove, runner holes are formed in the positions, close to the two output screw rod abdicating holes, of the two runner holes respectively, a runner cavity arranged around the capacitor module mounting groove is communicated between the two runner holes, a power module welding area is formed in the bearing surface above the runner cavity, a power module is welded in the power module welding area, a support is arranged above the heat dissipation plate and made of an insulating material, the capacitor module is mounted on the support, and a PCB module is arranged below the heat dissipation plate. According to the invention, through the integrated design of the heat dissipation plate, the power module, the bracket, the capacitor module and the PCB module, the compactness and the shock resistance are considered, and the requirement of a 48V BSG motor inverter is met.

Description

48V BSG motor integrated inverter

Technical Field

The invention belongs to the technical field of BSG motor inverters, and particularly relates to a 48V BSG motor integrated inverter.

Background

Energy conservation and emission reduction are common responsibilities of all human beings and strong desires of most social members. Under the environment that fossil fuels are increasingly exhausted and the automobile technology is rapidly developed, the national requirements on automobile oil consumption and emission are more and more strict. Although the BSG technology is not as good as the fuel cell and pure electric technology no matter the energy saving and emission reduction effect or the advanced degree, the technology is gradually seen by experts in the industry, and may occupy the position of the energy saving and emission reduction mainstream technology of the traditional power automobile for a long time in the future. The BSG technology has the greatest advantages of small change to the whole vehicle and limited increased cost. Taking the case of the Chery A5 equipped with the BSG, the manufacturer prices are 7.48 ten thousand yuan, and compared with the ordinary A5 with the price of 6.98 ten thousand, the price is increased by about 7 percent, thereby creating conditions for the ordinary consumers to purchase BSG vehicle models. Moreover, with the expansion of market scale, the application cost of the BSG technology is expected to be further reduced, and when the price difference between the BSG vehicle type and the price of the traditional power vehicle with the same type is reduced to a certain degree, the cost factor of the BSG technology can be almost ignored. In addition, the problems of high battery attenuation, short endurance mileage, low charging speed and the like of the existing new energy automobile exist, so that the convenience degree of the popularization and the use of the pure electric automobile is greatly influenced, and particularly in the field of commercial vehicles, the pure electric commercial vehicle is limited in current development due to the large driving mileage and large output power. The 48V BSG (Belt-drive Starter Generator) belongs to the weak mixing technology in hybrid power, is a motor system integrating an inverter controller and a motor, and can realize the quick start and stop of the motor when an automobile is idling and recover energy when the automobile is braked. The power is provided during climbing, the comprehensive oil-saving efficiency can reach 8-12%, and the environment pollution and the energy consumption are reduced, and the products and parts are recycled or reused according to the green design principle known as '3R', namely Reduce, Reuse and Recycle.

Currently, 48V BSG systems are used in some passenger vehicles. Because the BSG system is arranged on a wheel train at the front end of an engine, the BSG system has smaller installation space, complex working environment, high temperature and large vibration, and thus, more severe requirements are provided for parts of the BSG system, such as large capacity, small ripple current, small volume and good anti-seismic performance required for a capacitor module of the BSG system. The starting power and the torque of the commercial vehicle are large, and the working conditions are more severe, so that the system is not successfully applied in the field of the commercial vehicles.

Currently, 48V BSG systems are used in some passenger vehicles. The commercial vehicle has more mileage and heavy load, and the total duration of the idling working condition is far longer than that of a passenger vehicle, so the oil consumption and the emission of harmful substances are more serious. As the starting power and the torque of the commercial vehicle are large, the BSG system of the passenger vehicle on the market can not meet the power requirement of the BSG system of the commercial vehicle, and the application of the 48V system in the field of the commercial vehicle is limited. For this purpose, a 48V BSG motor integrated inverter is designed.

Disclosure of Invention

The invention aims to provide a 48V BSG motor integrated inverter, which aims to solve the problem that no integrated structural design aiming at a commercial vehicle BSG motor inverter exists in the market at present.

In order to achieve the above purpose, the specific technical solution of the integrated inverter for a 48V BSG motor of the present invention is as follows:

A48V BSG motor integrated inverter comprises a heat dissipation plate, wherein the upper end surface of the heat dissipation plate is a bearing surface, the lower end surface of the heat dissipation plate is an assembly surface, a capacitor module mounting groove is formed in the middle of the bearing surface, two output screw rod abdicating holes are separately formed in front of one end of the capacitor module mounting groove, runner ports are respectively formed near the two output screw rod abdicating holes, a runner cavity arranged around the capacitor module mounting groove is communicated between the two runner ports, a power module welding area is arranged on the bearing surface above the runner cavity, a power module is welded on the power module welding area, a bracket is arranged above the heat dissipation plate and is made of insulating materials, a capacitor module is arranged on the bracket, a PCB module is arranged below the heat dissipation plate, through the integrated design of heating panel, power module, support, electric capacity module and PCB module, compromise compact structure and shock resistance, satisfy commercial car BSG motor inverter's demand simultaneously.

Further, power module welding area sets up to three to the electric capacity module mounting groove arranges as central article font, and the structure is compacter.

Further, a motor shield is arranged above the capacitor module and used for shielding the invention.

Furthermore, a flow disturbing component is fixedly arranged in the flow channel cavity and used for enhancing the disturbance effect of the cooling medium fluid, enhancing the heat dissipation effect and ensuring the normal work of the power module.

Furthermore, the runner port is a round hole and is used for being butted with a common water passing part in the market.

Furthermore, a closed-loop sealing groove is formed in the periphery of the heat dissipation plate bearing surface and used for enhancing the sealing effect.

Furthermore, the flatness of the welding area of the power module is not more than 0.4mm, so that a better welding effect is achieved.

Furthermore, the upper end face of the bracket is a bearing surface of the capacitor module of the bracket, and the lower end face of the bracket is a heat dissipation plate assembling surface of the bracket; the support includes capacitor module installation position, and capacitor module installation position is equipped with capacitor module mounting groove, the support sets up power module installation position at power module welding area's relative position, and power module installation position is equipped with power module mounting groove, the improve equipment's of being convenient for wholeness.

Furthermore, the support is provided with a through hole at the position opposite to the output screw abdicating hole, and is used for arranging the output screw.

Furthermore, the power module installation position is equipped with the connection inserts, and the connection inserts includes PCB inserts and stator item inserts, the connection inserts is equipped with the inserts reference column at heating panel assembly face, and the connection inserts is seen through at inserts reference column tip, and the part of seeing through is PCB module weld end, and the one end that the connection inserts stretched into the power module mounting groove is established to the terminal weld end for be connected with other structures.

Furthermore, the terminal welding end of the connecting insert is provided with a welding surface, the welding surface is consistent in level height, the welding surface comprises a PCB insert terminal welding surface arranged on the PCB insert and a stator insert terminal welding surface arranged on the stator insert, the shapes of the welding surfaces of the PCB inserts are equal, the shapes of the welding surfaces of the stator inserts are equal, automatic welding is facilitated, and productivity can be improved.

Furthermore, a glue groove is formed in the assembling surface of the heat dissipation plate along the periphery of the power module mounting position.

Further, the capacitor module comprises a positive busbar and a negative busbar, the positive busbar and the negative busbar are formed by a positive busbar (51) and a negative busbar in a laminated structure, the positive busbar is arranged above the negative busbar, an insulating layer is arranged between the positive busbar and the negative busbar, a connecting arm is arranged on one side of an output screw abdicating hole of the positive busbar and the negative busbar, more than one terminal arm is arranged on the other three sides, the connecting arm and the terminal arm are bent to enable the positive busbar and the negative busbar to be a box body, the bottom in the box body is a capacitor mounting surface, the capacitor mounting surface is uniformly provided with more than one capacitor mounting position for mounting electrolytic capacitors, the capacitor mounting position is provided with a capacitor mounting hole for penetrating capacitor pins, and the capacitor mounting position is of a slotting flattening structure.

Furthermore, the outer side of the capacitor mounting surface on one side of the connecting arm of the positive busbar and the outer side of the capacitor mounting surface on one side of the connecting arm of the negative busbar are provided with abdicating holes, PCB pins of the positive busbar and the negative busbar are respectively arranged at the abdicating holes, and the PCB pins of the negative busbar extend out of the abdicating holes.

Furthermore, a capacitor support is tangentially arranged on the capacitor mounting surface, a capacitor through hole for an electrolytic capacitor to pass through is formed in the capacitor support, and the electrolytic capacitor is clamped by the capacitor through hole.

Furthermore, an assembly hole is formed in the lower end face of the capacitor support, a positioning column is arranged at the assembly hole, the lower end face of the positioning column is circumscribed with the capacitor installation face, the outer side face of the positioning column is circumscribed with the outer side face of the electrolytic capacitor, and reinforcing ribs are arranged on the side face of the positioning column.

Furthermore, a screw rod connecting hole is formed in the capacitor support, and a metal sleeve is arranged in the screw rod connecting hole.

Furthermore, the upper end face of the capacitor support is coupled with a heat dissipation shell, and the heat dissipation shell is a metal shell.

Furthermore, the connecting arm is provided with a connecting hole, and the connecting hole is fixedly connected with the output screw rod through welding and/or thread locking.

Further, the insulating layer is a busbar insulating pad which completely separates the positive busbar from the negative busbar.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the integrated design of the heat dissipation plate, the power module, the bracket, the capacitor module and the PCB module, the structure compactness and the shock resistance are considered, and the requirement of the BSG motor inverter of the commercial vehicle is met.

2. The internal part of the invention is provided with the runner cavities which are uniformly distributed on the periphery of the heat dissipation plate, the heat dissipation effect can be greatly improved through the circulation of the cooling medium, the weight of the heat dissipation plate can be reduced, and the heat dissipation requirement of the 48V BSG system inverter is met.

3. The welding area of the power module is set to be three, and the capacitor module mounting groove is used as a center, and the structure is designed in a delta-shaped arrangement mode and is compact.

4. The bracket is integrally injection-molded by adopting an insulating material at one time, has good temperature resistance, insulating resistance and mechanical property, avoids high mold cost of split brackets with different structures, improves the production efficiency, reduces the overall weight of the inverter, and meets the light-weight requirement of a BSG system.

5. The welding ends of the terminals of the connecting insert are respectively provided with the welding surfaces, the horizontal heights of the welding surfaces are consistent, the shapes of the welding surfaces of the terminals of the PCB inserts are identical, the shapes of the welding surfaces of the terminals of the stator inserts are identical, the times of adjusting ultrasonic welding parameters can be reduced, and the welding efficiency is improved.

6. The glue groove is arranged on the assembling surface of the heat dissipation plate along the periphery of the power module mounting position, so that the connecting effect of the heat dissipation plate and the heat dissipation plate is improved.

7. The capacitor module is compact in overall structure, small in size, large in capacitance value of the capacitor, small in ripple current and good in shock resistance and heat dissipation, can meet the requirements of using a BSG (bus coupling bar) system of a commercial vehicle and small-sized light-weight development that an electrolytic capacitor is vertically placed in a heat dissipation shell and a capacitor bracket, and can improve shock resistance and heat conductivity of the capacitor module by filling sealant in gaps.

8. The positive bus and the negative bus adopt a laminated structure, have small inductance and are beneficial to heat dissipation, and the positive bus and the negative bus are completely separated by the bus insulating pad, so that the positive bus and the negative bus are fully insulated.

9. The capacitor mounting position adopts a slotted flattening structure, so that the welding space of the pins of the electrolytic capacitor can be ensured, the heat dissipation at welding points can be reduced during welding, the weldability is improved, and the pins of the electrolytic capacitor and the busbar are ensured to be welded firmly.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of the structure of the present invention;

FIG. 3 is an expanded view of the heat spreader plate of the present invention;

FIG. 4 is a schematic view of a stent in the configuration of the present invention;

FIG. 5 is a schematic view of an overall capacitor module according to the present invention;

FIG. 6 is a schematic diagram of positive and negative busbars in the structure of the present invention;

fig. 7 is a schematic perspective cross-sectional view of a capacitor module according to the present invention.

The reference numbers in the figures illustrate: 1. the heat sink comprises a heat sink plate, 11, a capacitor module mounting groove, 12, an output screw abdicating hole, 13, a runner port, 14, a runner cavity, 141, a flow disturbing component, 15, a power module welding area, 2, a power module, 3, a support, 311, a capacitor module mounting groove, 321, a through hole, 331, a power module mounting groove, 3321, a PCB insert, 3322, a stator item insert, 3323, an insert positioning column, 3324, a PCB module welding end, 3325, a terminal welding end, 4, a PCB module, 5, a capacitor module, 51, a positive busbar, 52, a negative busbar, 521, a slotted flattening structure, 53, an insulating layer, 54, a connecting arm, 541, a connecting hole, 542, an output screw, 55, a terminal arm, 551, a terminal, 56., a PCB pin, 57, an electrolytic capacitor, 58, a capacitor support, 582, an assembling hole, 5821, a positioning column, 59, a heat sink shell and 6, a motor shield.

The specific implementation mode is as follows:

for a better understanding of the objects, structure and function of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

Referring to fig. 1 to 7, a 48V BSG motor integrated inverter is designed, which includes a heat sink 1, which may be machined in different parts, then welding, wherein the upper end surface of the heat dissipation plate is a bearing surface, the lower end surface of the heat dissipation plate is an assembly surface, the middle part of the bearing surface is provided with a capacitor module installation groove 11, the front part of one end of the capacitor module installation groove 11 is separately provided with two output screw rod abdicating holes 12, the vicinity of the two output screw rod abdicating holes 12 is respectively provided with a runner port 13, a runner cavity 14 arranged around the capacitor module installation groove is communicated between the two runner ports 13, a power module welding area 15 is arranged on the bearing surface above the runner cavity 14, a power module 2 is welded on the power module welding area 15, a support 3 is installed above the heat dissipation plate 1, the support 3 is made of insulating materials, a capacitor module 5 is installed on the support 3, and a PCB module 4 is arranged below the heat dissipation plate 1. According to the invention, through the integrated design of the heat dissipation plate, the power module, the bracket, the capacitor module and the PCB module, the structure compactness and the shock resistance are considered, and the requirement of the BSG motor inverter of the commercial vehicle is met.

And a motor shield 6 for isolation protection is arranged above the capacitor module 5. A turbulent flow part 141 is arranged in the flow passage cavity 14, and the cooling effect is enhanced by turbulent flow of the cooling liquid. The runner port 13 is a round hole, which is convenient for butt joint of various water nozzles. The heat dissipation plate 1 is provided with stator wire positioning holes. The heat dissipation plate 1 is provided with a PCB mounting positioning hole. The heat dissipation plate 1 is provided with support PIN locating holes. The heat dissipation plate 1 is provided with a plug mounting hole. The bearing surface of the heat dissipation plate 1 is provided with a closed-loop sealing groove along the periphery, and the sealing groove is used for placing a sealing ring, an O-shaped sealing ring can be preferably selected, and the sealing effect of equipment is improved. The flatness of the welding area 15 of the power module is not more than 0.4mm, and the welding effect of the power module is guaranteed. The upper end face of the bracket 3 is a capacitor module bearing face, and the lower end face of the bracket 3 is a heat dissipation plate assembling face; the bracket includes a capacitor module mounting location that is provided with a capacitor module mounting slot 311. And the support 3 is provided with an output screw mounting position at the relative position of the output screw abdicating hole 12. The bracket 3 is provided with a power module mounting position at the opposite position of the power module welding area 15, and the power module mounting position is provided with a power module mounting groove 331. The power module mounting position is provided with a connecting insert, and the connecting insert comprises a PCB insert 3321 and a stator insert 3322. The connecting insert is provided with an insert positioning column 3323 on the heat dissipation plate assembly surface, the connecting insert penetrates out of the end part of the insert positioning column 3323, the penetrating part is a PCB module welding end 3324, and one end of the connecting insert extending into the power module mounting groove 331 is set as a terminal welding end 3325. The bracket 3 is made of an insulating material. The bracket 3 is provided with mounting holes for integral assembly along the periphery, so that the integrity of the invention is ensured. The terminal welding end 3325 of the connecting insert is provided with a welding surface respectively, the welding surface comprises a PCB insert terminal welding surface arranged on the PCB insert and a stator insert terminal welding surface arranged on the stator insert, and the horizontal heights of the welding surfaces are consistent. The shapes of the welding surfaces of the PCB insert terminals are identical, the shapes of the welding surfaces of the stator insert terminals are identical, a welding machine can complete all welding through one-time parameter input, and the welding efficiency is improved. The output screw mounting position is provided with a through hole 321. The capacitor module 5 comprises a positive busbar and a negative busbar, the positive busbar and the negative busbar are formed by a positive busbar 51 and a negative busbar 52 in a laminated structure, the positive busbar 51 is arranged above the negative busbar 52, and an insulating layer 53 is arranged between the positive busbar 51 and the negative busbar 52. The connecting arm 54 is arranged on one side of the output screw abdicating hole 12 of the positive and negative bus bars, more than one terminal arm 55 is arranged on the other three sides, the connecting arm 54 and the terminal arm 55 are bent to enable the positive and negative bus bars to be in a box body, and the bottom in the box body is a capacitor mounting surface. The terminal arm 55 is U-shaped, and a terminal 551 is provided at the outer end of the terminal arm 55. The connecting arm 54 is provided with a connecting hole 541 at a position opposite to the output screw abdicating hole 12, and the output screw 542 is installed in the connecting hole 541. The outer side of the capacitor mounting surface on one side of the connecting arm 54 of the positive busbar 51 is provided with a yielding hole, PCB pins 56 are respectively arranged on the yielding holes of the positive busbar and the negative busbar, and the PCB pins 56 of the negative busbar 52 extend out of the yielding holes. The lower end surface of the capacitor support 58 is provided with an assembling hole 582. The assembly hole 582 is provided with a positioning column 5821. The lower end face of the positioning column 5821 is externally tangent to the capacitor mounting face, and the outer side face of the positioning column 5821 is externally tangent to the outer side face of the electrolytic capacitor 57. The capacitor support 58 is provided with a screw connection hole. And a metal sleeve is arranged in the screw connecting hole, so that the durability of the capacitor support is improved. The upper end face of the capacitor bracket 58 is coupled with a heat dissipation shell 59. And sealant is filled in the contact gap between the capacitor support 58 and the heat dissipation shell 59, so that the packaging effect is ensured. The capacitor support up end is equipped with the heat dissipation shell pilot hole. The heat dissipation shell assembly hole is an internal thread hole. The heat dissipation case 59 is provided with a through hole matched with the heat dissipation case assembly hole. The heat dissipation case 59 is a metal case. The output screw 542 is provided with a screw housing. The insulating layer 53 is a bus bar insulating pad. The busbar insulation pad completely separates the positive busbar from the negative busbar and the area of the busbar insulation pad is larger than that of the positive busbar and the negative busbar, so that the insulation effect is ensured. And the capacitor mounting position is provided with a capacitor mounting hole for the electrolytic capacitor pin to pass through. The capacitor mounting position adopts a slotted flattening structure 521, so that the welding effect is ensured, and meanwhile, the welding height is effectively reduced, and the invention has more compactness. In the above embodiment, 3 examples are listed to realize the above technical solution:

example 1

In this embodiment, the power module welding area 15 is set to be three, and the capacitor module mounting groove 11 is arranged in a delta shape with the center, so as to improve the compactness of the present invention. The flow disturbing member 141 is a protrusion provided on an inner wall of the flow channel chamber. The protrusion is a columnar turbulence column, and the structure is simple and easy to produce. The round hole is provided with internal threads which are directly communicated with the upper end surface of the round hole, so that the round hole is convenient to be matched with a water nozzle for use. The insulating material is insulating plastic. And the through hole is provided with an output screw counter bore on the bearing surface of the capacitor module. The reference column 5821 side is equipped with the strengthening rib, increases the stability of support. The metal shell is made of aluminum alloy. The connection hole 541 is fixedly connected to the output screw 542 by welding. The flatness of the welding area 15 of the power module is not more than 0.4mm, and the welding effect of the power module is guaranteed.

Example 2

In this embodiment, the spoiler 141 is a protrusion disposed on an inner wall of the flow channel chamber. The protrusions are columnar spoilers which are arranged along the direction of the flow channel and can effectively spoil the flow of the cooling liquid. The two runner ports 13 are arranged on one side of the bearing surface. The mounting hole is provided with a mounting counter bore on the mounting surface of the heat dissipation plate, so that the integrity of the assembly is facilitated. And more than one capacitor mounting position for mounting the electrolytic capacitor 57 is uniformly arranged on the capacitor mounting surface. The capacitor mounting surface is tangentially provided with a capacitor support 58, and the capacitor support 58 is provided with a capacitor through hole for the electrolytic capacitor 57 to pass through. The connection hole 541 is fixedly connected with the output screw 542 through thread locking. The flatness of the welding area 15 of the power module is not more than 0.3mm, and the welding effect of the power module is guaranteed.

Example 3

In this embodiment, the turbulence member 141 is a corrugated turbulence plate disposed on the inner wall of the flow channel cavity, and the turbulence plate is disposed along the flow channel direction, so as to effectively disturb the flow of the coolant; a horseshoe-shaped boss is arranged below the internal thread of the round hole, the horseshoe-shaped opening faces the flow channel, after the water nozzle is screwed down, the lower end face of the water nozzle contacts the horseshoe-shaped boss, and cooling medium in the water nozzle enters the flow channel cavity 14 along the horseshoe-shaped direction. The two runner ports 13 are arranged on one side of the assembling surface. The support 3 is provided with a reinforcing rib for increasing stability. And a glue groove is formed in the assembling surface of the heat dissipation plate along the periphery of the power module mounting position. The height of the capacitor bracket 58 is greater than the depth formed by bending the positive busbar and the negative busbar. The capacitor through hole clamps the electrolytic capacitor. The connection hole 541 is fixedly connected with the output screw 542 through welding and thread locking. The flatness of the welding area 15 of the power module is not more than 0.25mm, and the welding effect of the power module is guaranteed.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A48V BSG motor integrated inverter comprises a heat dissipation plate (1), and is characterized in that: the up end of heating panel is the loading end, the lower terminal surface of heating panel is the assembly face, the loading end middle part is equipped with capacitor module mounting groove (11), the place ahead of the one end of capacitor module mounting groove (11) separately is provided with two output screw hole (12) of stepping down, two output screw hole (12) of stepping down respectively are equipped with runner mouth (13), the intercommunication is equipped with runner chamber (14) of arranging around capacitor module mounting groove between two runner mouths (13), the loading end in runner chamber (14) top is equipped with power module welding area (15), power module welding area (15) welding has power module (2), support (3) are installed to heating panel (1) top, support (3) adopt insulating material to make, capacitor module (5) are installed to support (3), heating panel (1) below is equipped with PCB module (4).

2. The integrated inverter of a 48V BSG motor according to claim 1, wherein the power module welding areas (15) are arranged in three pieces in a delta-shape with the capacitor module mounting groove (11) as a center.

3. The integrated inverter of 48V BSG motor according to claim 1, wherein a motor cover (6) is disposed over the capacitor module (5).

4. The integrated inverter of a 48V BSG motor according to claim 1, wherein a spoiler (141) is fixedly disposed in the runner cavity (14).

5. The integrated inverter of 48V BSG motor according to claim 1, wherein the runner opening (13) is a circular hole.

6. The integrated inverter of 48V BSG motor according to claim 1, wherein the heat-dissipating plate (1) carrying surface is peripherally provided with a closed-loop sealing groove.

7. The integrated inverter of a 48V BSG motor according to claim 1, wherein the flatness of the welding area (15) of the power module is no greater than 0.4 mm.

8. The integrated inverter of the 48V BSG motor according to claim 1, wherein the upper end surface of the bracket (3) is a capacitor module bearing surface of the bracket, and the lower end surface of the bracket (3) is a heat dissipation plate assembling surface of the bracket; the support includes electric capacity module installation position, and electric capacity module installation position is equipped with electric capacity module mounting groove (311), support (3) set up power module installation position in the relative position of power module welding area (15), and power module installation position is equipped with power module mounting groove (331).

9. The 48V BSG motor integrated inverter as claimed in claim 8, wherein the bracket (3) is provided with a through hole (321) at a position opposite to the output screw abdicating hole (12).

10. The 48V BSG motor integrated inverter as claimed in claim 8, wherein the power module mounting location is provided with a connection insert including a PCB insert (3321) and a stator top insert (3322), the connection insert is provided with an insert positioning post (3323) at the heat dissipating plate mounting surface, the connection insert is protruded from an end of the insert positioning post (3323) to form a PCB module soldering terminal (3324), and an end of the connection insert protruded into the power module mounting groove (331) is provided with a terminal soldering terminal (3325).

11. The integrated inverter of 48V BSG motor according to claim 10, wherein the terminal welding ends (3325) of the connection inserts each have a welding surface with a uniform horizontal height, the welding surfaces include a PCB insert terminal welding surface provided on the PCB insert (3321) and a stator insert terminal welding surface provided on the stator insert, the PCB insert terminal welding surfaces have a uniform shape, and the stator insert terminal welding surfaces have a uniform shape.

12. The integrated 48V BSG motor inverter as claimed in claim 8, wherein the heat sink mounting surface of the bracket has a glue groove along the periphery of the power module mounting location.

13. A48V BSG motor integrated inverter as defined in claim 1, the method is characterized in that: the capacitor module (5) comprises a positive busbar and a negative busbar, the positive busbar and the negative busbar are formed by a laminated structure of a positive busbar (51) and a negative busbar (52), the positive busbar (51) is arranged above the negative busbar (52), an insulating layer (53) is arranged between the positive busbar (51) and the negative busbar (52), the positive and negative busbar is provided with a connecting arm (54) at one side of the output screw abdicating hole (12), more than one terminal arm (55) is arranged on the other three sides, the connecting arm (54) and the terminal arm (55) are bent to enable the positive bus bar and the negative bus bar to be box bodies, the bottom in the box bodies is a capacitor mounting surface, the capacitor mounting surface is uniformly provided with more than one capacitor mounting position for mounting an electrolytic capacitor (57), the capacitor mounting position is provided with a capacitor mounting hole for an electrolytic capacitor pin to pass through, and the capacitor mounting position adopts a slotted flattening structure (521).

14. The integrated inverter of the 48V BSG motor according to claim 13, wherein a relief hole is formed in an outer side of the capacitor mounting surface on one side of the connecting arm (54) of the positive busbar (51), PCB pins (56) are respectively arranged at the relief hole in the positive busbar and the negative busbar, and the PCB pins (56) of the negative busbar (52) extend out of the relief hole.

15. The integrated 48V BSG motor inverter as recited in claim 13, wherein the capacitor mount surfaces are tangentially provided with capacitor brackets (58), the capacitor brackets (58) are provided with capacitor through holes for passing the electrolytic capacitors (57), and the capacitor through holes hold the electrolytic capacitors.

16. The integrated 48V BSG motor inverter as claimed in claim 15, wherein a mounting hole (582) is formed in a lower end face of the capacitor support (58), a positioning column (5821) is arranged at the mounting hole (582), the lower end face of the positioning column (5821) is circumscribed with the capacitor mounting surface, the outer side face of the positioning column (5821) is circumscribed with the outer side face of the electrolytic capacitor (57), and reinforcing ribs are arranged on the side face of the positioning column (5821).

17. The integrated 48V BSG motor inverter as claimed in claim 15, wherein the capacitor bracket (58) has a screw connection hole, and a metal sleeve is disposed in the screw connection hole.

18. The integrated inverter for a 48V BSG motor according to claim 15, wherein a heat dissipation case (59) is coupled to an upper end surface of the capacitor bracket (58), and the heat dissipation case (59) is a metal case.

19. The integrated inverter of the 48V BSG motor according to claim 13, wherein the connecting arm (54) is provided with a connecting hole (541), and the connecting hole (541) is fixedly connected with the output screw (542) by welding and/or thread locking.

20. The integrated inverter of the BSG motor of 48V as recited in claim 13, wherein the insulation layer (53) is a busbar insulation pad, and the busbar insulation pad completely separates the positive busbar from the negative busbar.