CN118739866A - Flat-lay inverter brick assembly and vehicle - Google Patents

Abstract

The invention relates to the technical field of inversion bricks, in particular to a tiled inversion brick assembly and an automobile, wherein the tiled inversion brick assembly comprises: the substrate is provided with a first installation position and a second installation position adjacently; the capacitor module is arranged on the first installation position; the heat dissipation module is arranged on the second installation position; the power module is arranged on the heat dissipation module and is connected with the top of the heat dissipation module; the circuit board module is arranged on the power module and is connected with the top of the power module; according to the invention, the capacitor module and the heat dissipation module are arranged on the substrate to form a tiled design, and the power module and the circuit board module are integrated on the heat dissipation module, so that the structure of the inverter system is flatter, the integration of the inverter system is improved, good conditions are provided for the high-efficiency and high-temperature operation of the inverter system, the energy utilization efficiency of a new energy automobile can be improved, the endurance mileage is prolonged, the running cost is reduced, and the performance and the competitiveness of the whole automobile are improved.

Description

Flat-lay inverter brick assembly and vehicle

Technical Field

The invention relates to the technical field of inverter bricks, and in particular to a flat-laying inverter brick assembly and a vehicle.

Background Art

An inverter is a converter that converts DC power (battery, storage bottle) into constant frequency and voltage or frequency and voltage regulated AC power (generally 220V, 50Hz sine wave). It is widely used in air conditioners, home theaters, electric grinding wheels, power tools, sewing machines, DVDs, VCDs, computers, televisions, washing machines, range hoods, refrigerators, video recorders, massagers, fans, lighting, etc. If you drive out to work or travel, you can use an inverter to connect the battery to drive electrical appliances and various tools. With the rapid advancement of new energy vehicle technology, the inverter system is a core component, and its performance and efficiency are directly related to the cruising range, operating stability and cost-effectiveness of new energy vehicles.

In the related art, the traditional inverter system usually adopts multiple single parts connected by simple mechanical means. This design has problems such as complex assembly, bulky size, low efficiency, and occupies a large installation space of the whole vehicle. For example, in CN114844371A, an inverter and an electric drive assembly having the same are proposed, and the various parts of the inverter are connected by a high-voltage wiring harness. This low-integration inverter system has been difficult to adapt to the development needs of the new energy vehicle industry.

Summary of the invention

In view of the above shortcomings of the prior art, an object of the present invention is to provide a flat-type inverter brick assembly and a vehicle, so as to solve the problem of low integration of the inverter system in the prior art.

To achieve the above-mentioned and other related purposes, the present invention provides a flat-laying inverter brick assembly, comprising:

A substrate, on which a first mounting position and a second mounting position are adjacently arranged;

A capacitor module is arranged at the first installation position;

A heat dissipation module is arranged at the second installation position;

A power module, arranged on the heat dissipation module and connected to the top of the heat dissipation module;

The circuit board module is arranged on the power module and connected to the top of the power module.

Furthermore, the capacitor module includes a shell, a thin film capacitor and a filter circuit, the shell is arranged on the first installation position, the thin film capacitor and the filter circuit are arranged in the shell, and the thin film capacitor and the filter circuit are electrically connected.

Furthermore, a high-voltage DC busbar is also provided on the film capacitor, and the film capacitor is electrically connected to the power module via the high-voltage DC busbar.

Furthermore, the heat dissipation module comprises a heat dissipation water channel and a first sealing ring. Injection ports for coolant are arranged on both sides of the heat dissipation water channel. The injection ports are provided with a first sealing ring for sealing the heat dissipation water channel.

Furthermore, the upper surface of the film capacitor is also covered with a heat dissipation plate for heat dissipation, and the bottom of the heat dissipation water channel is in contact with the heat dissipation plate.

Furthermore, the power module and the heat dissipation water channel are sealed and connected, and the bottom of the power module is in close contact with the heat dissipation water channel.

Furthermore, the flat-type inverter brick assembly also includes: a current sensor, which is arranged on one side of the power module. The power module is also provided with a three-phase copper busbar on a side close to the current sensor. The three-phase copper busbar passes through the current sensor and electrically connects the current sensor to the power module.

Furthermore, the power module includes a plurality of power module half bridges, and the power module half bridges are connected to each other by laser welding.

Furthermore, the circuit board module includes a control circuit, a drive circuit and a circuit main board, and the control circuit and the drive circuit are both arranged on the circuit main board.

Based on the same inventive concept, the present invention also provides a car, comprising the flat-laying inverter brick assembly as described above.

As described above, the present invention has at least the following beneficial effects:

By arranging the capacitor module and the heat dissipation module on the substrate to form a flat structure, the power module and the circuit board module are integrated on the heat dissipation module, and the various modules of the inverter system are integrated on the substrate, the overall volume and weight of the inverter system are reduced, which not only makes the structure of the inverter system flatter and improves the integration of the inverter system, but also enables the various functional modules of the inverter brick to be independently composed of modules, reducing the difficulty of installation and maintenance of the inverter system and facilitating customization and replacement. At the same time, the flat layout of the inverter brick assembly directly integrates the power module on the heat dissipation module, improves the heat dissipation performance of the inverter system, and provides good conditions for the high efficiency and high temperature operation of the inverter system, which can improve the energy utilization efficiency of new energy vehicles, extend the cruising range, reduce operating costs, and enhance the performance and competitiveness of the entire vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a tiled inverter brick assembly from a first viewing angle according to an exemplary embodiment of the present invention;

FIG2 is a schematic structural diagram of a second viewing angle of a tiled inverter brick assembly shown in an exemplary embodiment of the present invention;

Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2 .

Part Number Description

1-substrate; 2-capacitor module; 3-heat dissipation module; 4-circuit board module; 5-current sensor; 6-three-phase copper busbar; 7-output port; 8-first sealing ring; 9-heat dissipation water channel; 10-power module; 11-housing.

DETAILED DESCRIPTION

The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", "first", "second", etc. cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

It should be noted that most traditional inverter systems are split-type. The application of this split-type inverter system in the new energy vehicle industry has the following shortcomings: First, the volume and weight are large. The traditional split-type inverter system needs to design and manufacture different functional modules separately, resulting in a large overall volume and relatively heavy weight, which is not conducive to the lightweight design of new energy vehicles and increases the energy consumption and manufacturing costs of the vehicle; Second, the installation and maintenance are complicated. The split-type inverter system needs to install components in different positions of the vehicle, which not only increases the complexity of installation, but also increases the difficulty of maintenance. In addition, since the connection and coordination between the various components need to be precisely controlled, this further increases the difficulty of manufacturing and assembly; Third, the heat dissipation performance is poor. Due to structural limitations, the heat dissipation performance of the split-type inverter system is often not improved. Especially in high temperature environments, the components of the split-type inverter system are prone to heat accumulation, resulting in performance degradation or even damage, thereby affecting The reliability and safety of new energy vehicles; Fourth, the cost is high. Since the split inverter system needs to be manufactured and assembled separately, the cost in the production process is high. In addition, since the connection and coordination between the various components need to be precisely controlled, this also increases the cost of manufacturing and assembly; Fifth, the system efficiency is low. During the energy conversion and transmission process, the split inverter system is prone to energy loss due to the existence of multiple interfaces and connection points, resulting in reduced efficiency of the inverter system, which not only affects the cruising range of new energy vehicles, but also increases energy consumption and operating costs; Sixth, the stray inductance is large. In the design of the split inverter system, bolts are required between the components. This connection method will introduce a large stray inductance. The stray inductance will not only increase the energy consumption of the system and reduce efficiency, but may also affect the stability and reliability of the module, especially in the application scenario of high frequency, high voltage and high temperature such as SiC power modules. The impact of stray inductance is more significant.

In this embodiment, referring to FIG. 1 to FIG. 3 , the present invention provides a flat-lay inverter brick assembly, including:

A substrate 1, on which a first mounting position and a second mounting position are adjacently arranged;

Capacitor module 2, arranged at a first installation position;

The heat dissipation module 3 is arranged at the second installation position;

The power module 10 is arranged on the heat dissipation module 3 and connected to the top of the heat dissipation module 3;

The circuit board module 4 is disposed on the power module 10 and connected to the top of the power module 10 .

In a flat inverter brick assembly provided by the present invention, a capacitor module 2 and a heat dissipation module 3 are arranged on a substrate 1 to form a flat structure, and a power module 10 and a circuit board module 4 are integrated on the heat dissipation module 3, so that each module of the inverter system is integrated on the substrate 1, reducing the overall volume and weight of the inverter system. Not only does it make the structure of the inverter system flatter and improve the integration of the inverter system, but it also enables the various functional modules of the inverter brick to independently form modules, reducing the difficulty of installation and maintenance of the inverter system and facilitating customization and replacement. At the same time, the flat layout of the inverter brick assembly directly integrates the power module 10 on the heat dissipation module 3, thereby improving the heat dissipation performance of the inverter system, providing good conditions for high efficiency and high temperature operation of the inverter system, and being able to improve the energy utilization efficiency of new energy vehicles, extend cruising range, reduce operating costs, and enhance the performance and competitiveness of the entire vehicle.

In this embodiment, the capacitor module 2 includes a shell 11, a thin film capacitor and a filter circuit. The shell 11 is set at the first installation position, the thin film capacitor and the filter circuit are set in the shell 11, and the thin film capacitor and the filter circuit are electrically connected. The filter circuit and the thin film capacitor are integrated in the shell 11 to form an integrated capacitor module 2. Compared with the capacitor structure in the traditional inverter system, the capacitor module 2 of the present invention has the advantages of small size, large capacity, and good stability. It can significantly improve the energy storage and release efficiency of the inverter brick assembly, while reducing the overall volume and weight of the inverter brick. This integrated capacitor module 2 not only optimizes the performance of the inverter brick, but also improves its applicability and reliability in new energy vehicles. At the same time, by optimizing the filter circuit design and the selection of filter components, efficient noise suppression and interference filtering of the thin film capacitor are achieved, the noise and interference in the power supply are effectively removed, and the stable operation of the electronic components and control system inside the electric vehicle is ensured, providing a strong guarantee for the safe and efficient operation of the electric vehicle.

In this embodiment, the upper surface of the film capacitor is also covered with a heat sink for heat dissipation. The heat dissipation plate is used to dissipate heat from the film capacitor, so that the capacitor module 2 can ensure the heat dissipation performance of the film capacitor while integrating the film capacitor and the filter circuit.

It is understandable that the traditional split inverter system, due to structural limitations, often has poor heat dissipation performance. Especially in high-temperature working environments, split devices are prone to heat accumulation, resulting in performance degradation or even damage, thereby affecting the reliability and safety of new energy vehicles. The present invention not only optimizes the heat dissipation of the power module, but also takes into account the heat dissipation performance of the capacitor module. Compared with the traditional split inverter system, heat accumulation is not easy to occur, thereby ensuring the performance of the inverter system. In addition, by integrating the power module in the heat dissipation waterway, the heat dissipation structure does not need to occupy a separate installation space, which not only reduces the installation volume occupied by the inverter system, but also improves the heat dissipation efficiency of the power module, providing good conditions for the high performance of the inverter system and working in a high-temperature working environment.

In this embodiment, a high-voltage DC busbar is also provided on the thin-film capacitor, and the thin-film capacitor is electrically connected to the power module 10 through the high-voltage DC busbar. Specifically, the power module 10 includes a plurality of power module half-bridges, and the plurality of power module half-bridges are interconnected by laser welding. After the welding of the half-bridges of the power module 10 is completed, an installation bracket is formed and arranged on the heat dissipation channel 9. The heat dissipation structure at the bottom of the power module 10 is in close contact with the heat dissipation channel 9, which not only ensures the overall stable and compact structure, but also meets the heat dissipation requirements. Then, the power module 10 is connected to the three-phase copper bus 6 and the capacitor module 2 respectively by laser welding.

In this embodiment, please refer to FIG. 2 , the heat dissipation module 3 includes a heat dissipation channel 9 and a first sealing ring 8 , and injection ports for coolant are arranged on both sides of the heat dissipation channel 9 , and the injection ports are provided with a first sealing ring 8 for sealing the heat dissipation channel 9 , specifically, the heat dissipation channel 9 and the substrate 1 are an integrally formed structure, the power module 10 and the heat dissipation channel 9 are sealed and connected, and the bottom of the power module 10 is in close contact with the heat dissipation channel 9 , and by directly arranging the heat dissipation channel 9 on the substrate 1 , the heat dissipation channel 9 occupies less installation space, and by sealingly connecting the heat dissipation channels 9 to the heat dissipation channels 9 , only the sealed connection between the power module 10 and the heat dissipation channel 9 needs to be ensured, which greatly simplifies the sealing process, reduces the sealing connection points and sealing interfaces, reduces the complexity and production cost of manufacturing and assembling the heat dissipation module 3 , and reduces the sealing interfaces and connection points, and is not easy to generate energy loss during the energy conversion and transmission process of the inverter system, thereby improving the overall efficiency of the inverter system, helping to improve the cruising range of new energy vehicles, and reducing energy consumption and operating costs.

In some embodiments, as described in Figures 2 and 3, the flat inverter brick assembly also includes: a current sensor 5, which is arranged on one side of the power module 10. The power module 10 is also provided with a three-phase copper busbar 6 on the side close to the current sensor 5. The three-phase copper busbar 6 passes through the current sensor 5 and electrically connects the current sensor 5 to the power module 10. The current sensor 5 is connected to the power module 10 through the three-phase copper busbar 6. The current sensor 5 can detect and display the current, and protect the power module 10 when dangerous situations such as overcurrent and overvoltage occur. By integrating the current sensor 5 with the power module 10, the integration of the inverter brick assembly is further improved.

In some embodiments, the circuit board module 4 includes a control circuit, a drive circuit and a circuit main board. The control circuit and the drive circuit are both arranged on the circuit main board. The circuit main board is also provided with an output port 7 for connecting to the vehicle. The circuit board module 4 serves as the control center of the entire inverter brick and is responsible for receiving, processing and sending control signals. By integrating the control circuit and the drive circuit into the circuit board module 4, not only the accuracy and stability of the inverter process can be ensured, but also the complexity of assembly and maintenance difficulty of the circuit board module 4 are reduced, which facilitates customization and replacement and is more suitable for new energy vehicles.

Specifically, the circuit board is covered on the top of the power module 10, and the circuit board module 4 is packaged on the drive module, thereby eliminating the upper cover structure of the circuit module in the traditional inverter system, simplifying the overall design, and improving the reliability of the inverter brick structure.

It can be understood that the flat inverter brick assembly provided by the present invention integrates the capacitor module 2, the heat dissipation module 3, the power module 10 and the circuit board module 4 on the substrate 1. Compared with the traditional split inverter system, this highly integrated method reduces the bolt connection method, does not introduce a large stray inductance, does not increase the energy consumption of the system, ensures the stability and reliability of each module, and helps to improve the overall efficiency of the inverter system. At the same time, the highly integrated inverter brick can adapt to the different layouts and interface requirements of the OEM's self-made electric drive, greatly expanding the application scenarios, so that the inverter brick can be more widely used for various new energy power architecture vehicle electric drive controllers for application development and adaptation.

In the above embodiment, the present invention also provides a car, comprising the above flat-lay inverter brick assembly.

In summary, in a flat inverter brick assembly provided by the present invention, the capacitor module 2 and the heat dissipation module 3 are arranged on the substrate 1 to form a flat structure, and the power module 10 and the circuit board module 4 are integrated on the heat dissipation module 3, so that the various modules of the inverter system are integrated on the substrate 1, reducing the overall volume and weight of the inverter system. Not only does it make the structure of the inverter system flatter and improve the integration of the inverter system, but it also enables the various functional modules of the inverter brick to independently form modules, reducing the difficulty of installation and maintenance of the inverter system and facilitating customization and replacement. At the same time, the flat layout of the inverter brick assembly directly integrates the power module 10 on the heat dissipation module 3, thereby improving the heat dissipation performance of the inverter system, providing good conditions for high efficiency and high temperature operation of the inverter system, and can improve the energy utilization efficiency of new energy vehicles, extend cruising range, reduce operating costs, and enhance the performance and competitiveness of the entire vehicle.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims (10)

1. A tiled inversion tile assembly, comprising:

The device comprises a substrate, wherein a first mounting position and a second mounting position are adjacently arranged on the substrate;

the capacitor module is arranged on the first installation position;

The heat dissipation module is arranged on the second installation position;

the power module is arranged on the heat dissipation module and is connected with the top of the heat dissipation module;

And the circuit board module is arranged on the power module and is connected with the top of the power module.

2. The tiled inversion tile assembly of claim 1, wherein: the capacitor module comprises a shell, a film capacitor and a filter circuit, wherein the shell is arranged on the first installation position, the film capacitor and the filter circuit are arranged in the shell, and the film capacitor is electrically connected with the filter circuit.

3. The tiled inversion tile assembly of claim 2, wherein: and the thin film capacitor is further provided with a high-voltage direct current busbar, and the thin film capacitor is electrically connected with the power module through the high-voltage direct current busbar.

4. The tiled inversion tile assembly of claim 2, wherein: the heat dissipation module comprises a heat dissipation water channel and a first sealing ring, wherein two sides of the heat dissipation water channel are provided with an injection opening of cooling liquid, and the injection opening is provided with the first sealing ring for sealing the heat dissipation water channel.

5. The tiled inversion tile assembly of claim 4, wherein: the upper surface of the film capacitor is also coated with a heat dissipation plate for heat dissipation, and the bottom of the heat dissipation water channel is in fit contact with the heat dissipation plate.

6. The tiled inversion tile assembly of claim 4, wherein: the power module is in sealing connection with the heat dissipation water channel, and the bottom of the power module is in fit contact with the heat dissipation water channel.

7. The tiled, inverted tile assembly of claim 1, further comprising: the current sensor is arranged on one side of the power module, a three-phase copper bar is further arranged on one side, close to the current sensor, of the power module, the three-phase copper bar penetrates through the current sensor, and the current sensor is electrically connected with the power module.

8. The tiled inversion tile assembly of claim 1, wherein: the power module comprises a plurality of power module half-bridges, and the power module half-bridges are connected with each other through laser welding.

9. The tiled inversion tile assembly of claim 1, wherein: the circuit board module comprises a control circuit, a driving circuit and a circuit main board, wherein the control circuit and the driving circuit are arranged on the circuit main board.

10. An automobile comprising a tiled inverter tile assembly according to any one of claims 1-9.