CN214850985U

CN214850985U - Inverter for new energy automobile

Info

Publication number: CN214850985U
Application number: CN202120649971.4U
Authority: CN
Inventors: 陈登峰; 陈雷; 位超群; 张舟云; 温小伟; 吕成; 张允飞
Original assignee: Shanghai Auto Edrive Co Ltd; Shanghai Auto Edrive Engineering Technology Research Center; Shanghai Edrive Co Ltd
Current assignee: Shanghai Auto Edrive Co Ltd; Shanghai Auto Edrive Engineering Technology Research Center; Shanghai Edrive Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-11-23
Anticipated expiration: 2031-03-31

Abstract

The utility model relates to an inverter for new energy automobile, include: the cooling module comprises a shell and a cover plate, wherein the shell is provided with a cooling assembly and an input terminal; the input assembly, the thin film capacitor, the power assembly and the output assembly are connected in sequence; the input assembly, the film capacitor, the power assembly and the output assembly are tiled in a single layer and arranged in the shell, and the input end of the input assembly is connected to the input terminal. Compared with the prior art, the utility model discloses internally integrated input subassembly, power component and output module triplex, integrated degree is high, compact structure, and the triplex is whole to adopt the individual layer tiling to arrange, and high to the utilization ratio in casing space, the focus of controller reduces a lot, and structural more the platyzization is convenient for moreover in the direct assembly of dc-to-ac converter casing or from the internal dismouting of box, the maintenance is conveniently maintained.

Description

Inverter for new energy automobile

Technical Field

The utility model relates to a vehicle dc-to-ac converter especially relates to a new energy automobile is with dc-to-ac converter.

Background

With the continuous popularization of pure electric vehicles, the requirements of the whole vehicle on an electric drive system are higher and higher, and the arrangement space inside the whole vehicle is smaller and smaller. Because the module in the inverter generates a large amount of heat, the heat dissipation capability of the inverter must be ensured to be good when the inverter is high in design integration and small in size. The motor controller for the traditional pure electric automobile generally comprises an input pole plate, an input support, a capacitor, a sensor, a module, a driving PCB, a shielding plate, a control PCB and other devices, all the internal parts are assembled inside an inverter shell in a dispersing mode, the integration level is not high, the assembly space is large, the disassembly and the assembly are inconvenient to maintain, and the requirement of the internal assembly space of the whole automobile is difficult to meet. When the controller with the higher center is arranged above the motor and the gearbox to form the whole three-in-one system, the height of the whole three-in-one assembly is larger, the height of the controller is particularly high, the gravity center of the controller is positioned on the highest point, in the operation process, the controller is equivalent to a cantilever beam which swings, the vibration level of the cantilever beam is multiplied, and great challenges are brought to the safety of each part in the controller, particularly a power module. And the inside parts of the existing controller are all locked and connected through the fastening pieces, the mutual parts are dispersed, the integration level is low, the occupied size is large, the vibration resistance is poor, the possibility of part damage is easily caused in the single vibration or assembly vibration process, and the safe operation of the whole vehicle is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an inverter for new energy automobile, controller internal integration input assembly, power component and output module triplex, integrate the degree height, compact structure, the triplex is whole to adopt the individual layer tiling to arrange, and high to the utilization ratio of casing space, the focus of controller reduces a lot, and structural more the platyzization is convenient for in addition direct assembly or from the internal dismouting of box in the inverter casing, the maintenance is maintained to the convenience.

The purpose of the utility model can be realized through the following technical scheme:

an inverter for a new energy automobile, comprising:

the cooling device comprises a shell and a cover plate, wherein the shell is provided with a cooling assembly and an input terminal;

the input assembly, the thin film capacitor, the power assembly and the output assembly are connected in sequence;

the input assembly, the film capacitor, the power assembly and the output assembly are tiled in a single layer and arranged in the shell, and the input end of the input assembly is connected to the input terminal.

The input assembly, the thin film capacitor, the power assembly and the output assembly are sequentially arranged.

The input assembly comprises a supporting seat, a grounding bar, a Y capacitor, a positive plate, a negative plate and a magnetic ring, wherein the grounding bar, the Y capacitor, the positive plate, the negative plate and the magnetic ring are fixed on the supporting seat, the input ends of the positive plate and the negative plate are connected with an input terminal, positive pins and negative pins of the Y capacitor are respectively connected with the input ends of the positive plate and the negative plate, the grounding pins are connected with the grounding bar, the input end of the thin film capacitor penetrates through the center of the magnetic ring to be electrically connected with the output ends of the positive plate and the negative plate, and the output end of the thin film capacitor is connected with the power assembly.

The casing is provided with a PDU plug-in unit, and a positive terminal and a negative terminal of the PDU plug-in unit are connected with the positive plate and the negative plate respectively.

The supporting seat comprises a first hole, a second hole, a third hole, a fourth hole, a fifth hole and a mounting hole, the fifth hole is formed right above the third hole, the mounting hole is formed in the side face of the supporting seat, the Y capacitor is mounted in the first hole, the negative plate is mounted in the second hole, the third hole is of an elliptical annular structure, the magnetic ring is mounted in the third hole, and the grounding bar is mounted in the fourth hole.

The fifth hole is of a cuboid structure, and threaded holes for assembling fuses are formed in two sides of the fifth hole.

The power component comprises an IGBT, a fixing seat, a PCB and a triplet sensor, wherein the input end of the IGBT is fixed on the fixing seat, the PCB is fixed on the IGBT and electrically connected with the IGBT, the triplet sensor is fixed on the IGBT and electrically connected with the PCB, a control circuit, a driving circuit and a current detection circuit are arranged on the PCB, and the current detection circuit is located on one side of the triplet sensor.

And an O-shaped ring is arranged on the matching surface of the bottom surface of the IGBT and the shell.

The output assembly comprises an alternating current polar plate and an alternating current support, the alternating current polar plate is fixed on the alternating current support, and the input end of the alternating current polar plate is connected with the power assembly.

The shell is internally provided with an output hole, a first sinking groove and a second sinking groove, the output hole, the first sinking groove and the second sinking groove are arranged in parallel, and the first sinking groove is connected with the cooling assembly.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) the controller is internally integrated with an input assembly, a power assembly and an output assembly, the integration degree is high, the structure is compact, the three parts are all tiled by a single layer, the utilization rate of the space of the shell is high, the gravity center of the controller is greatly reduced, the structure is more flattened, and the direct assembly in the inverter shell or the disassembly and assembly in the box are convenient, so that the maintenance is convenient.

2) The mode that input assembly, film capacitor, power module and output assembly arranged in proper order is adopted, can reduce the cable and crooked, improves the reliability, improves electromagnetic properties.

3) The input assembly integrates the Y capacitor, the magnetic ring, the positive plate, the negative plate and the like in the support, and the whole integration is installed on the basis of the supporting seat.

4) The supporting seat has many structures in the design, Y electric capacity has not only been satisfied, the installation of magnetic ring is fixed, fuse mounting groove and pressure touch switch fixing thread hole have still been seted up simultaneously, can satisfy the installation of fuse and pressure touch switch, the integrated level is higher, and, the quantity and the volume of installation spare part have been saved greatly in controller inside, make whole controller structural design realize more ground functions, also improve controller EMC performance well with Y electric capacity and magnetic ring integrated mode simultaneously.

5) The power component integrates the PCB, the IGBT, the fixing seat and the triplet sensor, one part of the two sides of the PCB is hung outside the IGBT, the PCB is fixedly welded with the triplet sensor, and meanwhile, the driving part, the control part and the current detection part are integrated on the PCB, the parts are tiled and arranged, the number of the parts is reduced, the integration level is high, and the assembly and the disassembly are simple and convenient.

6) The output hole, the first sinking groove and the second sinking groove are arranged in parallel, and the arrangement flatness is improved, so that the gravity center is further reduced.

Drawings

Fig. 1 is a schematic diagram of an explosion structure in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an input assembly according to an embodiment;

FIG. 3 is a schematic structural diagram of a power module according to an embodiment;

FIG. 4 is a schematic structural diagram of an output module in an embodiment;

FIG. 5 is a schematic structural view of the upper bottom surface of the housing in the embodiment;

FIG. 6 is a schematic structural view of the bottom surface of the housing in the embodiment;

FIG. 7 is a schematic view of an embodiment of a support base;

wherein: 1. a shell, 2, an input wire harness, 3, a PDU plug-in unit, 4, an input assembly, 5, a film capacitor, 6, a power assembly, 7, a low-voltage plug-in unit, 8, an output assembly, 9, a water inlet pipe, 10, a cover plate, 1-1, an output hole, 1-2, a first sink groove, 1-3, a second sink groove, 1-4, a first water outlet hole, 1-5, a second water inlet hole, 1-6, a first water inlet hole, 1-7, a second water outlet hole, 4-1, a support seat, 4-2, a grounding bar, 4-3, a Y capacitor, 4-4, a negative plate, 4-5, a positive plate, 4-6, a magnetic ring, 4-1-1, a first hole, 4-1-2, a second hole, 4-1-3, a third hole, 4-1-4 and a fourth hole, 4-1-5 parts of a fifth hole, 4-1-6 parts of a mounting hole, 6-1 parts of an IGBT (insulated gate bipolar transistor), 6-2 parts of a fixing seat, 6-3 parts of a PCB (printed circuit board), 6-4 parts of a triplet sensor, 8-1 parts of an alternating current polar plate, 8-2 parts of an alternating current support.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

An inverter for a new energy automobile, as shown in fig. 1, includes:

the cooling structure comprises a shell 1 and a cover plate 10, wherein a cooling assembly and an input terminal are arranged on the shell 1;

the input assembly 4, the thin film capacitor 5, the power assembly 6 and the output assembly 8 are connected in sequence;

the input assembly 4, the film capacitor 5, the power assembly 6 and the output assembly 8 are tiled in a single layer in the shell 1, the input end of the input assembly 4 is connected to the input terminal, and the input terminal is connected with the input wiring harness 2.

The controller is internally integrated with an input assembly 4, a power assembly 6 and an output assembly 8, and is high in integration degree, compact in structure, high in utilization rate of a shell space due to the fact that the three parts are all tiled by a single layer, the center of gravity of the controller is greatly reduced, the controller is more flat in structure, and the controller is convenient to assemble directly in the inverter shell or disassemble and assemble from the box body, and is convenient to maintain.

The input assembly 4, the thin-film capacitor 5, the power assembly 6 and the output assembly 8 are sequentially arranged, so that cable bending can be reduced, reliability is improved, and electromagnetic performance is improved.

In some embodiments, as shown in fig. 2, the input assembly 4 includes a support base 4-1, a ground bar 4-2 fixed on the support base 4-1, a Y capacitor 4-3, a positive plate 4-5, a negative plate 4-4, and a magnetic ring 4-6, wherein the input ends of the positive plate 4-5 and the negative plate 4-4 are connected to the input terminal, the positive and negative pins of the Y capacitor 4-3 are respectively connected to the input ends of the positive plate 4-5 and the negative plate 4-4, the ground pin is connected to the ground bar 4-2, the input end of the thin film capacitor 5 passes through the center of the magnetic ring and is electrically connected to the output ends of the positive plate and the negative plate, and the output end is connected to the power assembly. The input assembly 4 integrates the Y capacitor 4-3, the magnetic ring 4-6, the positive plate 4-5, the negative plate 4-4 and the like into the support seat 4-1, and the whole integration is installed on the basis of the support seat 4-1.

As shown in fig. 7, the supporting seat 4-1 comprises a first cavity 4-1-1, a second cavity 4-1-2, a third cavity 4-1-3, a fourth cavity 4-1-4, a fifth cavity 4-1-5 and a mounting hole 4-1-6, the fifth cavity 4-1-5 is arranged right above the third cavity 4-1-3, the mounting hole 4-1-6 is arranged on the side surface of the supporting seat 4-1, the Y capacitor is mounted in the first cavity 4-1-1 by epoxy potting, the negative plate 4-4 is arranged in the second hole 4-1-2, the third hole 4-1-3 is of an elliptical ring structure, the magnetic ring 4-6 is arranged in the third hole 4-1-3, and the grounding bar 4-2 is arranged in the fourth hole 4-1-4. The fifth hole 4-1-5 is a cuboid structure, and threaded holes for assembling fuses are formed in two sides of the fifth hole. The fourth holes 4-1-4 exist in pairs, the grounding bars 4-2 are also installed in the fourth holes 4-1-4 in pairs, and two Y capacitors 4-3 are connected in parallel to form a capacitor and installed in the first holes 4-1-1. The supporting seat 4-1 has a plurality of structures in design, so that the installation and fixation of the Y capacitor 4-3 and the magnetic ring 4-6 are met, meanwhile, a fuse installation groove and a press-touch switch fixing threaded hole are also formed, the installation of a fuse and a press-touch switch can be met, the integration level is higher, in addition, the number and the volume of installation parts are greatly saved in the controller, the structural design of the whole controller realizes more functions, and meanwhile, the EMC performance of the controller is also well improved by the mode of integrating the Y capacitor 4-3 and the magnetic ring 4-6. In some embodiments, the casing 1 is further provided with a PDU insert, and a positive terminal and a negative terminal of the PDU insert are respectively connected with the positive plate 4-5 and the negative plate 4-4.

In some embodiments, as shown in fig. 3, the power module 6 includes an IGBT6-1, a fixing base 6-2, a PCB 6-3, and a triplet sensor 6-4, an input terminal of the IGBT6-1 is fixed on the fixing base 6-2, the PCB 6-3 is fixed on the IGBT and electrically connected to the IGBT6-1, the triplet sensor 6-4 is fixed on the IGBT6-1 and electrically connected to the PCB 6-3, the PCB 6-3 is provided with a control circuit, a driving circuit, and a current detection circuit, and the current detection circuit is located near the triplet sensor 6-4 side. The power component integrates a PCB 6-3, an IGBT6-1, a fixed seat 6-2 and a triplet sensor 6-4, one part of two sides of the PCB 6 is suspended outside the IGBT and is a control circuit part, one part of the PCB 6 is fixedly welded with the triplet sensor, and meanwhile, a driving part, a control part and a current detection part are integrated on the PCB 6 and are arranged in a tiled mode, so that the number of parts is reduced, the integration level is high, and the assembly and the disassembly are simple and convenient. In some of these embodiments, the mating surfaces of the bottom surface of the IGBT6-1 and the housing 1 are provided with O-rings. The inverter is also provided with a low-voltage plug-in 7 electrically connected to the power module 6.

In some embodiments, as shown in FIG. 4, the output assembly 8 includes an AC plate 8-1 and an AC mount 8-2; the alternating current polar plate 8-1 penetrates through the middle of the alternating current support 8-2, the output end of the alternating current polar plate is fixed on the alternating current support 8-2, and the input end of the alternating current polar plate is electrically connected with the three-phase output end of the power assembly 6.

In some embodiments, the housing 1 is provided with an output hole 1-1, a first sink tank 1-2 and a second sink tank 1-3, the output hole 1-1, the first sink tank 1-2 and the second sink tank 1-3 are arranged in parallel, the first sink tank 1-2 is connected with a cooling assembly, in one embodiment, the cooling assembly is water-cooled, specifically, as shown in fig. 5 and 6, the housing is provided with an output hole 1-1, a first sink tank 1-2, a second sink tank 1-3, a first water outlet 1-4, a second water inlet 1-5, a first water inlet 1-6 and a second water outlet 1-7, the first sink tank 1-2, the second sink tank 1-3 and the output hole 1-1 are arranged in parallel and are arranged on the bottom surface of the housing 1, and the first water outlet 1-4, the second water inlet 1-5, the second water outlet 1-3, The first water inlet hole 1-6 and the second water outlet hole 1-7 are cylindrical holes, the first water inlet hole 1-4 and the second water inlet hole 1-5 are respectively arranged at two ends of the first sinking groove 1-2, the first water inlet hole 1-6 is communicated with the first water outlet hole 1-4, the second water inlet hole 1-5 is communicated with the second water outlet hole 1-7, the water inlet pipe 9 is fixed on the first water inlet hole 1-5, and the second water outlet hole 1-7 can be connected with an external cooling system.

The assembly process of the inverter is as follows:

1. firstly, fixing all the Y capacitor 4-3, the positive plate 4-5, the negative plate 4-4, the ground bar 4-2 and the magnetic ring 4-6 on the support seat 4-1, completing the fixing of relevant connection parts, and completing the assembly of the input assembly;

2. then, fixing the input end of the IGBT6-1 on the fixed seat 6-2, fixing the PCB 6-3 on the IGBT6-1, fixing the pin of the IGBT6-1 and the PCB 6-3 by soldering, fixing the triplet sensor 6-4 on the IGBT6-1, welding the pin of the triplet sensor 6-4 and the PCB 6-3 by soldering, and fixing the PCB 6-3 on the IGBT6-1 by using a self-tapping screw, thus finishing the assembly of the power component 6;

3. and (3) penetrating the alternating current polar plate 8-1 through the alternating current support 8-2, and fixing the output end of the alternating current polar plate 8-1 on the alternating current support 8-2 to complete the assembly of the output assembly 8.

4. The input assembly 4, the power assembly 6, the thin film capacitor 5 and the output assembly 8 are fixed on the bottom surface of the shell 1, the output ends of the positive and negative electrode plates of the input assembly 4 are fixedly connected with the input end of the thin film capacitor 5 through bolts, the output end of the thin film capacitor 5 and the input end of the IGBT6-1 of the power assembly 6 are fixed on the fixed seat 6-2 through bolts, and the alternating current electrode plate of the output assembly 8 penetrates through the triplet sensor 6-4 of the power assembly 6 and is fixed on the triplet sensor 6-4 together with the output end of the IGBT6-1 of the power assembly 6.

5. And a water inlet pipe 9 is cold-pressed on the second water outlet holes 1-7 on the bottom surface of the shell 1, the PDU plug-in unit 3 and the low-voltage plug-in unit 7 are fixed on the side surface of the shell 1, the wire harness end of the low-voltage plug-in unit 7 is in plug-in connection with the PCB 6-3, and the positive terminal and the negative terminal of the PDU plug-in unit 3 are respectively connected with the positive plate 4-5 and the negative plate 4-4 of the input assembly and fixed on the supporting seat 4-1.

6. And carrying out an insulation withstand voltage test on the inverter.

7. The cover plate 10 is fixed to the housing 1 by bolts, and thus, the assembly of the controller is completed.

Claims

1. An inverter for a new energy automobile, comprising:

the device comprises a shell (1) and a cover plate (10), wherein a cooling assembly and an input terminal are arranged on the shell (1);

the device comprises an input assembly (4), a thin film capacitor (5), a power assembly (6) and an output assembly (8) which are connected in sequence;

the thin film capacitor-type power module is characterized in that the input assembly (4), the thin film capacitor (5), the power assembly (6) and the output assembly (8) are tiled in a single layer mode in the shell (1), and the input end of the input assembly (4) is connected to the input terminal.

2. The inverter for the new energy automobile is characterized in that the input assembly (4), the film capacitor (5), the power assembly (6) and the output assembly (8) are sequentially arranged.

3. The inverter for the new energy automobile as claimed in claim 1, wherein the input assembly (4) comprises a support base (4-1) and a ground bar (4-2) fixed on the support base (4-1), a Y capacitor (4-3), a positive plate (4-5), a negative plate (4-4) and a magnetic ring (4-6), the input ends of the positive plate (4-5) and the negative plate (4-4) are connected with the input terminal, the positive pin and the negative pin of the Y capacitor (4-3) are respectively connected with the input ends of the positive plate (4-5) and the negative plate (4-4), the ground pin is connected with the ground bar (4-2), the input end of the thin film capacitor (5) passes through the center of the magnetic ring and is electrically connected with the output ends of the positive plate and the negative plate, the output end is connected with the power component.

4. The inverter for the new energy automobile as claimed in claim 3, wherein the casing (1) is further provided with a PDU plug-in unit, and a positive terminal and a negative terminal of the PDU plug-in unit are respectively connected with the positive plate (4-5) and the negative plate (4-4).

5. The inverter for the new energy automobile as claimed in claim 3, wherein the support base (4-1) comprises a first hole (4-1-1), a second hole (4-1-2), a third hole (4-1-3), a fourth hole (4-1-4), a fifth hole (4-1-5) and a mounting hole (4-1-6), the fifth hole (4-1-5) is arranged right above the third hole (4-1-3), the mounting hole (4-1-6) is arranged on the side surface of the support base (4-1), the Y capacitor is arranged in the first hole (4-1-1), the negative plate (4-4) is arranged in the second hole (4-1-2), the third hole (4-1-3) is of an elliptical ring structure, the magnetic ring (4-6) is installed in the third hole (4-1-3), and the grounding bar (4-2) is installed in the fourth hole (4-1-4).

6. The inverter for the new energy automobile as claimed in claim 5, wherein the fifth cavity (4-1-5) is of a rectangular parallelepiped structure, and threaded holes for installing fuses are formed in two sides of the fifth cavity.

7. The inverter for the new energy automobile as claimed in claim 1, wherein the power assembly (6) comprises an IGBT (6-1), a fixing seat (6-2), a PCB (6-3) and a triplet sensor (6-4), the input end of the IGBT (6-1) is fixed on the fixing seat (6-2), the PCB (6-3) is fixed on the IGBT and electrically connected with the IGBT (6-1), the triplet sensor (6-4) is fixed on the IGBT (6-1) and electrically connected with the PCB (6-3), the PCB (6-3) is provided with a control circuit, a driving circuit and a current detection circuit, and the current detection circuit is located near the triplet sensor (6-4).

8. The inverter for the new energy automobile is characterized in that an O-shaped ring is arranged on the matching surface of the bottom surface of the IGBT (6-1) and the shell (1).

9. The inverter for the new energy automobile is characterized in that the output assembly (8) comprises an alternating current polar plate (8-1) and an alternating current support (8-2), the alternating current polar plate (8-1) is fixed on the alternating current support (8-2), and the input end of the alternating current polar plate is connected with the power assembly (6).

10. The inverter for the new energy automobile according to claim 1, wherein an output hole (1-1), a first sinking groove (1-2) and a second sinking groove (1-3) are arranged in the housing (1), the output hole (1-1), the first sinking groove (1-2) and the second sinking groove (1-3) are arranged in parallel, and the first sinking groove (1-2) is connected with a cooling assembly.