CN113291159A

CN113291159A - A supporting structure for 48V's BSG motor inverter

Info

Publication number: CN113291159A
Application number: CN202110614705.2A
Authority: CN
Inventors: 郭慧; 倪鹏; 韩振
Original assignee: Jiangsu Yunyi Electric Co Ltd
Current assignee: Jiangsu Yunyi Electric Co Ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2021-08-24

Abstract

The invention discloses a support structure for a 48V BSG motor inverter, which comprises a support body, wherein the upper end surface of the support body is a bearing surface, the lower end surface of the support body is an assembling surface, the support body comprises a capacitor module mounting position, a capacitor module mounting groove is formed in the capacitor module mounting position, an output screw mounting position is arranged at one end of the capacitor module mounting groove, the other end of the capacitor module mounting groove is centered on the capacitor module mounting groove, three power module mounting positions are arranged in a shape like a Chinese character 'pin', the power module mounting positions are provided with power module mounting grooves and connecting inserts, the connecting inserts comprise PCB inserts and stator inserts, and through the arrangement of the support body, the support structure achieves compact structure and high mechanical strength, meanwhile, the effects of supporting, positioning and mounting other modules of a controller are achieved, and the small and light development requirements of an integrated BSG system are met.

Description

A supporting structure for 48V's BSG motor inverter

Technical Field

The invention belongs to the technical field of 48V BSG motor inverters, and particularly relates to a bracket structure for a 48V BSG motor 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 of 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. The BSG system is mainly divided into a 12V system and a 48V system, and the 12V system is difficult to meet the current requirements of vehicles with increasingly complex functions, so the 48V system is the main research direction in various large yards.

At present, 48V BSG systems are applied to partial passenger vehicles, but are limited to larger starting power and starting torque, and no 48V system is applied to commercial vehicles. The commercial vehicle has the advantages of more driving mileage, large motor power and compact installation space, and puts more severe requirements on a 48V system. The BSG system comprises a motor and a control inverter, wherein the control inverter is the key for realizing the functions of the BSG system, and comprises a capacitor module, a power module and other parts, so that the support structure for the BSG motor inverter of 48V is required to be designed for meeting the small-size and light-weight development requirements of the BSG system of a commercial vehicle, achieving a support with a compact structure and high mechanical strength and realizing the support, positioning and installation of each module of a controller.

Disclosure of Invention

The invention aims to provide a bracket structure for a 48V BSG motor inverter, which meets the development requirements of small size and light weight of a commercial vehicle BSG system, achieves a bracket with compact structure and high mechanical strength, and simultaneously realizes the support, positioning and installation of each module of a controller.

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

the utility model provides a supporting structure for 48V's BSG motor inverter, which comprises a bracket body, support body up end is the loading end, the terminal surface is the fitting surface down, the support body includes electric capacity module installation position, electric capacity module installation position is equipped with electric capacity module mounting groove, the one end of electric capacity module mounting groove is equipped with output screw rod installation position, the other end of electric capacity module mounting groove uses electric capacity module mounting groove as the center, peripheral article font sets up three power module installation position, power module installation position is equipped with power module mounting groove and connects the inserts, it includes PCB inserts and stator item inserts to connect the inserts, setting through the support body, reach compact structure, high mechanical strength, realize the support to other each module of controller simultaneously, the effect of location and installation.

Furthermore, connect the inserts and be equipped with the reference column at the fitting surface, connect the inserts and see through at the reference column tip, see through the part and be PCB module weld end, connect the inserts and stretch into the one end of power module mounting groove and establish to terminal weld end, through the setting of reference column to satisfy the assembly with other modules of controller.

Furthermore, the terminal welding end of the connecting insert is provided with a welding surface, the welding surface comprises a PCB insert terminal welding surface provided by the PCB insert and a stator insert terminal welding surface provided by the stator insert, the horizontal heights of the welding surfaces are consistent, automatic welding is convenient to realize, and production efficiency is improved.

Furthermore, 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, and therefore the automatic welding equipment can conveniently realize high-efficiency operation without frequently adjusting construction parameters.

Furthermore, the groove wall of the capacitor module mounting groove is provided with a capacitor module positioning bulge for ensuring the positioning of the capacitor module and improving the glue leakage prevention effect during the filling and sealing of the capacitor module.

Furthermore, the bracket body is made of an insulating solid material and can be integrally formed through an injection molding process, so that the bracket is high and stable in production capacity and low in cost.

Further, the support body is provided with mounting holes along the periphery for the holistic assembly of support body, be equipped with the metal covering in the mounting hole, support structure intensity when guaranteeing to be connected with other modules, the mounting hole is equipped with the installation counter bore at the assembly face, is convenient for improve support structure's wholeness and aesthetic measure.

Further, the support body is equipped with the structure groove for can effectively reduce the shrinkage deformation of the back supporting structure of moulding plastics, guarantee the supporting structure size qualification rate, in order to satisfy with the assembly of other modules of controller, the structure groove can also effectively drop heavily material saving.

Furthermore, output screw rod installation position is equipped with the through-hole for the adaptation output screw rod, the through-hole is equipped with the output screw rod counter bore at the loading end, better location installation output screw rod improves the suitability, the through-hole is equipped with the installation boss at the assembly face for improve whole suitability.

Furthermore, the assembly surface is provided with a glue groove along the periphery of the power module installation position, so that the sealing effect is improved through glue injection at the later stage.

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

1. according to the invention, through the arrangement of the support body, the effects of compact structure, high mechanical strength, support, positioning and installation of other modules of the controller are realized, and the small-size and light-weight development requirements of the integrated BSG system are met.

2. According to the invention, through the arrangement of 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 automatic welding parameters can be reduced, and the welding efficiency is improved.

3. The invention adopts the insulating solid material for injection molding, has good temperature resistance, insulating resistance and mechanical property, can reduce the whole weight of the inverter and meet the light weight requirement of a BSG system; the one-time integral injection molding can be adopted, so that the high mold cost of split supports with different structures is avoided, and the production efficiency is improved;

4. according to the integrated PCB insert and the stator insert, the welding insert terminal is adopted to replace the traditional bolt connection, so that the space occupied by the power module can be reduced, and the effective electrical connection between the power module and the motor stator is realized.

5. The assembling surface is provided with the glue groove along the periphery of the power module mounting position, so that the connecting effect with the heat dissipation plate is improved.

6. The positioning column and the structural groove can effectively reduce the shrinkage deformation of the bracket after injection molding, ensure the dimensional qualification rate of the bracket so as to meet the requirement of assembling with other modules of the controller, and can also effectively reduce the weight and save materials.

Drawings

Fig. 1 is a perspective view of a bearing surface in embodiment 2 of the present invention;

FIG. 2 is a perspective view of an assembly plane in accordance with embodiment 2 of the present invention;

fig. 3 is a schematic perspective view of a bearing surface in embodiment 3 of the present invention;

FIG. 4 is a perspective view of an assembly plane in accordance with embodiment 3 of the present invention;

the reference numbers in the figures illustrate: 1. the structure comprises a support body, 11 mounting holes, 111 metal sleeves, 13 structural grooves, 2 bearing surfaces, 3 assembling surfaces, 31 glue grooves, 41 capacitor module mounting grooves, 411 capacitor module positioning protrusions, 421 through holes, 422 output screw counter bores, 423 mounting bosses, 51 power module mounting grooves, 6 PCB inserts, 7 stator inserts, 8 positioning columns, 91 PCB module welding ends and 92 terminal welding ends.

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.

A bracket structure for a 48V BSG motor inverter is designed, which comprises a bracket body 1, the upper end surface of the bracket body 1 is a bearing surface 2, the lower end surface is an assembling surface 3, the bracket body 1 comprises a capacitor module mounting position, the capacitor module mounting position is provided with a capacitor module mounting groove 41, one end of the capacitor module mounting groove 41 is provided with an output screw mounting position, the other end of the capacitor module mounting groove 41 takes the capacitor module mounting groove 41 as the center, three power module mounting positions are arranged in a shape like a Chinese character 'pin' on the periphery, the power module mounting positions are provided with power module mounting grooves 13 and connecting inserts, the connecting inserts comprise PCB inserts 6 and stator inserts 7, and the bracket body 1 is compact in structure and high in mechanical strength, meanwhile, the effects of supporting, positioning and installing other modules of the controller are achieved, and the small-size and light-weight development requirements of the integrated BSG system are met.

When processing, fix PCB inserts 6 and stator item inserts 7 in the injection mold groove in proper order, the 6 head chamfers of PCB inserts are convenient for place, and the back support of moulding plastics is put into design system and is stereotyped 1-2 minutes to guarantee the size qualification rate in the above embodiment, enumerate 3 kinds of embodiments and realize above-mentioned technical scheme:

example 1

This embodiment is the connection inserts is equipped with reference column 8 at assembly surface 3, and reference column 8 is the cuboid structure, and the connection inserts sees through at reference column 8 tip, and the part of seeing through is PCB module welding end 91, PCB module welding end 91 head chamfer handle and with PCB module assembly end local tin-plating, be convenient for mould plastics, the assembly, with PCB module assembly welding, the one end of connecting inserts and stretching into power module mounting groove 41 is established to terminal welding end 92, through reference column 8's setting to satisfy the assembly with other modules of controller. The terminal welding ends 92 of the connecting inserts are respectively provided with a welding surface, the ultrasonic welding insert terminals are adopted to replace the traditional bolt connection, the space occupied by the power module can be reduced, the effective electric connection between the power module and the motor stator is realized, the welding surfaces comprise 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 equal, the shapes of the welding surfaces of the stator insert terminals are equal, the horizontal heights of the welding surfaces are consistent, automatic welding is convenient to achieve, production efficiency is improved, and efficient operation can be achieved without frequently adjusting construction parameters of automatic welding equipment. The bracket body 1 is made of an insulating solid material, can be formed by injection molding, has good temperature resistance, insulating resistance and mechanical property, can reduce the overall weight of the inverter, and meets the light weight requirement of a BSG system; the one-time integral injection molding is adopted, so that the high mold cost of split supports with different structures is avoided, and the production efficiency is improved. The output screw mounting position is provided with a through hole 421 for adapting the output screw.

Example 2

As shown in fig. 1 to 2, this embodiment is on the basis of embodiment 1, support body 1 is equipped with mounting hole 11 along the periphery for the holistic assembly of support body, mounting hole 11 is equipped with installation counter bore 12 at assembly surface 3, is convenient for improve support structure's wholeness and aesthetic measure, support body 1 is equipped with structure groove 13 for can effectively reduce the shrinkage deformation of the back support structure of moulding plastics, guarantee support structure size qualification rate, in order to satisfy with the assembly of other modules of controller, the structure groove can also effectively reduce the weight, material saving, support body 1 is equipped with strengthening rib 14, further strengthens support structural strength. The through hole 421 is provided with an output screw counter bore 422 on the bearing surface 2, so that the output screw can be positioned and installed better, and the adaptability is improved. The assembly surface 3 is provided with a glue groove 31 along the periphery of the power module mounting position, so that the sealing effect is improved through glue injection at the later stage. The edge of the positioning column 8 adopts a chamfer. The chamfer is a straight chamfer. The insulating solid material adopts insulating plastics, and the PPS material is selected for use in this embodiment.

Example 3

As shown in fig. 3 to 4, in this embodiment, on the basis of embodiment 1, a capacitor module positioning protrusion 411 is disposed on a wall of the capacitor module installation groove 41, so as to ensure positioning of the capacitor module and improve an anti-glue leakage effect during potting of the capacitor module; and a metal sleeve 111 is arranged in the mounting hole 11, so that the structural strength of the support is ensured when the support is connected with other modules. The support body 1 is provided with the structure groove 13, and the outline of the structure groove 13 is similar to the outline of the support body 1, so that the shrinkage deformation of the injection-molded support structure can be effectively reduced, the dimensional qualification rate of the support structure is ensured, the assembly with other modules of a controller is met, the weight of the structure groove can be effectively reduced, and materials are saved. The through hole 421 is provided with an output screw counter bore 422 on the bearing surface 2, so that the output screw can be positioned and installed better, and the adaptability is improved. The through hole 421 is provided with a mounting boss 423 on the mounting surface 3 for improving the overall suitability. The edge of the positioning column 8 adopts a chamfer. The chamfer is a round chamfer. The insulating material is insulating plastic, and the embodiment selects a PBT material; the support body 1 is provided with the structural groove 13, so that materials can be saved, the weight is reduced, the shrinkage deformation of the injection-molded support is effectively reduced, the dimensional qualification rate of the support is ensured, and the assembly with other modules of the controller is met. The power module mounting groove 51 is provided with a clearance groove for better adapting the capacitor module.

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. A support structure for a 48V BSG motor inverter, comprising a support body (1), characterized in that: support body (1) up end is loading end (2), the lower terminal surface is assembly face (3), support body (1) is including electric capacity module installation position, electric capacity module installation position is equipped with electric capacity module mounting groove (41), the one end of electric capacity module mounting groove is equipped with output screw rod installation position, the other end of electric capacity module mounting groove (41) uses electric capacity module mounting groove (41) as the center, peripheral article font sets up three power module installation position, power module installation position is equipped with power module mounting groove (51) and connects inserts, it includes PCB inserts (6) and stator item inserts (7) to connect the inserts.

2. The bracket structure for a 48V BSG motor inverter according to claim 1, wherein the connecting insert is provided with a positioning column (8) on the assembling surface (3), the connecting insert is protruded out of the end of the positioning column (8), the protruded part is a PCB module welding end (91), and one end of the connecting insert, which is protruded into the power module mounting groove (41), is provided as a terminal welding end (92).

3. The bracket structure for a 48V BSG motor inverter according to claim 2, wherein the terminal weld ends (92) of the connection inserts are each provided with a weld face, the weld faces include a PCB insert terminal weld face provided with the PCB insert and a stator core insert terminal weld face provided with the stator core insert, and the weld faces are uniform in level.

4. The bracket structure for a 48V BSG motor inverter as claimed in claim 3, wherein the PCB insert terminal soldering surface shapes are congruent, and the stator insert terminal soldering surface shapes are congruent.

5. The bracket structure for a 48V BSG motor inverter according to claim 1, wherein the capacitor module mounting groove (41) has a capacitor module positioning protrusion (411) formed on a groove wall thereof.

6. The bracket structure for the 48V BSG motor inverter according to claim 1, wherein the bracket body (1) is made of an insulating solid material.

7. The bracket structure for the 48V BSG motor inverter according to claim 1, wherein the bracket body (1) is provided with mounting holes (11) along the periphery, and metal sleeves (111) are arranged in the mounting holes (11).

8. The bracket structure for a 48V BSG motor inverter according to claim 1, characterized in that the bracket body (1) is provided with a structural groove (13).

9. The bracket structure for the 48V BSG motor inverter according to claim 1, wherein the output screw mounting position is provided with a through hole (421), the through hole (421) is provided with an output screw counter bore (422) on the bearing surface (2), and the through hole (421) is provided with a mounting boss (423) on the mounting surface (3).

10. The bracket structure for a 48V BSG motor inverter according to claim 1, wherein the mounting surface (3) is provided with a glue groove (31) along the periphery of the power module mounting position.