Connecting assembly of power converter magnetic part, power converter and energy storage equipment

Abstract

The embodiment of the utility model provides a connecting assembly of a power converter magnetic piece, a power converter and energy storage equipment. The connecting assembly is used for connecting the power converter magnetic piece to a circuit board of the energy storage equipment. The connecting assembly of the power converter magnetic piece comprises a base and a magnetic piece, wherein the base is provided with two or more positioning holes; a positioning pin; the mounting position of the base in the energy storage equipment is positioned through the matching of the positioning pin and the positioning hole; at least one magnetic piece wiring terminal; at least one circuit board wiring terminal; one end of the lap joint metal sheet is connected with a wiring pin of the power converter magnetic piece, and the other end of the lap joint metal sheet is installed between the magnetic piece wiring terminal and the circuit board wiring terminal; and the wiring screw connects the magnetic piece wiring terminal, the circuit board wiring terminal and the lap joint metal sheet. Through the arrangement, the power density of a product is improved, the assembling difficulty and the later maintenance cost of equipment are reduced, and the maintainability and the reliability of the equipment are improved.

Description

Technical Field

[0001] This utility model relates to the field of magnetic components for power converters, and more particularly to a connection component for a power converter magnetic component, a power converter, and an energy storage device. Background Technology

[0002] In photovoltaic-storage systems, photovoltaic converters are used to convert the direct current generated by photovoltaic cells into alternating current suitable for grid connection or load use. However, the power converter magnetic components in photovoltaic converters are bulky and heavy. If they are directly soldered onto a printed circuit board (PCB), it is very easy to cause severe deformation of the PCB. Therefore, they must be installed separately.

[0003] In existing technical solutions, the power converter magnets are typically fixed to the housing and then connected to the PCB via cables. (See reference...) Figure 1 As shown.

[0004] However, the power magnets and their cables occupy a significant amount of PCB space, resulting in a lower power density for the product. Furthermore, the power magnets have a large current capacity, and the cables are relatively thick, making actual product assembly difficult and leading to low production efficiency. Utility Model Content

[0005] This invention provides a connection component for a power converter magnetic component, a power converter, and an energy storage device to solve the problem that power magnetic components in existing photovoltaic converters occupy a lot of PCB space and are difficult to assemble.

[0006] According to one aspect of the present invention, a connection assembly for a power converter magnetic component is provided. The power converter magnetic component is used in an energy storage device, and the connection assembly is used to connect the power converter magnetic component to the circuit board of the energy storage device. The connection assembly comprises:

[0007] The base has two or more positioning holes, and the power converter magnets are fixed to the base.

[0008] Two or more locating pins are formed in the outer casing of the energy storage device; the installation position of the base inside the energy storage device is determined by the cooperation of the locating pins and locating holes.

[0009] At least one magnetic terminal block is provided on the base;

[0010] At least one circuit board terminal is provided on the circuit board;

[0011] A metal plate is used for bonding. One end of the metal plate is connected to the wiring pin of the power converter magnetic component, and the other end of the metal plate is installed between the magnetic component wiring terminal and the circuit board wiring terminal.

[0012] Wiring screws connect magnetic terminal blocks, circuit board terminal blocks, and cladding metal pieces together.

[0013] Optionally, the mounting position of the power converter magnets overlaps with the circuit board at least partially.

[0014] Optionally, the base can be mounted parallel to the circuit board.

[0015] Optionally, the overlapping metal strips can be Z-shaped or S-shaped.

[0016] Optionally, the magnetic terminal block and the circuit board terminal block are nuts.

[0017] Optionally, the base is made of insulating material.

[0018] Optionally, the base is provided with four positioning holes, two of which are located on one side of the mounting part of the power converter magnet on the base, and the other two positioning holes are located on the other side of the mounting part of the power converter magnet on the base; the housing is formed with four positioning pins, the positions of the four positioning pins corresponding to the positions of the four positioning holes.

[0019] Optionally, two electrical connections can be formed between the power converter magnets and the circuit board through two magnetic component terminals, two circuit board terminals, two overlapping metal plates, and two wiring screws.

[0020] According to another aspect of the present invention, a power converter is provided for an energy storage device, the power converter including a connection assembly of any of the power converter magnetic elements in the first aspect.

[0021] According to another aspect of the present invention, an energy storage device is provided, including at least one power converter, the power converter including a connection assembly of any of the power converter magnetic elements in the first aspect.

[0022] This utility model provides a connection assembly for a power converter magnetic component, a power converter, and an energy storage device. The power converter magnetic component is used in the energy storage device, and the connection assembly is used to connect the power converter magnetic component to the circuit board of the energy storage device. The connection assembly includes: a base with two or more positioning holes on it, the power converter magnetic component being fixed to the base; and two or more positioning pins formed in the outer shell of the energy storage device. The positioning pins, in cooperation with the positioning holes, position the base within the energy storage device. Based on this, by stacking with the circuit board, the internal structure is arranged more compactly, saving PCB space and reducing product volume, thereby increasing the power density of the product. By providing at least one magnetic component terminal on the base and at least one circuit board terminal on the circuit board, and by using a lap metal plate (one end connected to the pin of the power converter's magnetic component, the other end installed between the magnetic component terminal and the circuit board terminal), the assembly complexity of the device is reduced. By using wiring screws to connect the magnetic component terminal, the circuit board terminal, and the lap metal plate together, the structure ensures a tight connection between the three, guaranteeing efficient current transmission and constructing a complete electrical connection path. Through the above configuration, this embodiment of the invention improves the power density of the product, reduces the assembly difficulty and subsequent maintenance costs, and enhances the maintainability and reliability of the device.

[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the connection assembly of magnetic components in a power converter in the prior art.

[0026] Figure 2 A schematic diagram of a power converter provided in an embodiment of this utility model;

[0027] Figure 3 A schematic diagram of the structure of the power converter magnetic component provided in the embodiment of this utility model. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Figure 1 A schematic diagram of the connection assembly of magnetic components in a power converter in the prior art. Figure 2 This is a schematic diagram of the structure of a power converter provided in an embodiment of the present invention. Figure 3 A schematic diagram of the structure of the magnetic component of the power converter provided in an embodiment of this utility model. (See attached diagram.) Figure 2 As shown, the connection assembly for the power converter magnetic component 10 is used in an energy storage device. The connection assembly is used to connect the power converter magnetic component 10 to the circuit board 20 of the energy storage device. The connection assembly includes:

[0031] The base 30 has two or more positioning holes 32, and the power converter magnetic component 10 is fixed on the base 30.

[0032] Two or more positioning pins 41 are formed in the housing 40 of the energy storage device, which provides protection and support for the internal components; the positioning pins 41 are used in conjunction with the positioning holes 32 to position the base 30 in the energy storage device.

[0033] Specifically, such as Figure 2 As shown, the inner wall of the energy storage device's housing 40 is also provided with two or more positioning pins 41, and the two ends of the base 30 in the first direction are respectively fixed to the energy storage device's housing 40 by the positioning pins 41. Furthermore, when the positioning pins 41 are provided on the energy storage device's housing 40, the corresponding... Figure 3 As shown, the base 30 is also provided with positioning holes 32, and the positioning holes 32 and positioning pins 41 correspond one to one.

[0034] At least one magnetic terminal block 31 is disposed on the base 30;

[0035] At least one circuit board terminal 21 is provided on the circuit board 20.

[0036] Specifically, such as Figure 2 As shown, both the circuit board terminal 21 and the magnetic component terminal 31 can adopt an "n"-shaped structure. The contact surface with the overlapping metal sheet 50 forms the upper half of the "n" shape, while the remaining portion extends downwards to form the lower half. The circuit board terminal 21, the overlapping metal sheet 50, and the magnetic component terminal 31 are stacked sequentially, and threaded holes are provided at corresponding positions on the stack for screwing and fixing via threaded connection holes using wiring screws 51. This structure completes the electrical connection between the circuit board 20 and the power converter magnetic component 10. Furthermore, it structurally fixes the relative positions of the circuit board 20 and the power converter magnetic component 10 in the horizontal direction and provides a certain amount of redundant space in the vertical direction to accommodate circuit boards 20 with different circuit components.

[0037] A metal plate 50 is connected to a pin 11 of the power converter magnetic component 10 at one end, and the other end of the metal plate 50 is installed between the magnetic component terminal 31 and the circuit board terminal 21.

[0038] Specifically, the overlapping metal sheet 50 can be made of a metal material with good conductivity (such as copper or aluminum) to ensure smooth current transmission and realize electrical connection between components. In addition, in order to adapt to different spatial layouts and connection requirements, the overlapping metal sheet 50 is designed to be bent at least once to ensure that when the overlapping metal sheet 50 is subjected to stress, it can effectively buffer stress, reduce its own deformation, and ensure reliable electrical connection.

[0039] The wiring screw 51 connects the magnetic terminal 31, the circuit board terminal 21, and the lap metal piece 50 together.

[0040] Specifically, the thread size, pitch, and other parameters of the terminal screw 51 correspond to the inner diameter parameters of the magnetic terminal 31, the circuit board terminal 21, and the lap metal piece 50. Structurally, this ensures a tight connection between the three, increases the pressure between the terminal and the lap metal piece 50, reduces their contact resistance, and guarantees efficient current transmission. Furthermore, the terminal screw 51 can be made of a metal material with good conductivity (such as copper, aluminum, or iron alloys), allowing current to be smoothly conducted between the terminal and the lap metal piece 50 through the terminal screw 51, constructing a complete electrical connection path.

[0041] It should be noted that this embodiment of the invention does not limit the method of screw connection. (The rest of the text appears to be incomplete and requires further context.) Figure 2 As shown in the common screw connection position, the circuit board 20 is provided with a corresponding threaded opening. The wiring screw 51 passes through the circuit board 20, the circuit board terminal 21, the lap metal plate 50, and the magnetic component terminal 31 from top to bottom. This method is suitable for situations where the power converter magnetic component 10 is fixed in the housing 40 of the energy storage device first, and then the circuit board 20 is installed. This conforms to general operating habits and is convenient for workers to assemble. However, depending on different installation requirements and actual scenarios, for example, when it is necessary to combine the power converter magnetic component 10 with the circuit board 20 first and then put them together into the housing 40 of the energy storage device, a threaded opening can also be provided on the base 30, and a bottom-up screw connection method can be used. In this case, the wiring screw 51 passes through the base 30, the contact surface between the magnetic component terminal 31 and the lap metal plate 50, the lap metal plate 50, and the contact surface between the circuit board terminal 21 and the lap metal plate 50 in sequence.

[0042] This utility model provides a connection assembly for a power converter magnetic component, a power converter, and an energy storage device. The power converter magnetic component is used in the energy storage device, and the connection assembly is used to connect the power converter magnetic component to the circuit board of the energy storage device. The connection assembly includes: a base with two or more positioning holes on it, the power converter magnetic component being fixed to the base; and two or more positioning pins formed in the outer shell of the energy storage device. The positioning pins, in cooperation with the positioning holes, position the base within the energy storage device. Based on this, by stacking with the circuit board, the internal structure is arranged more compactly, saving PCB space and reducing product volume, thereby increasing the power density of the product. By providing at least one magnetic component terminal on the base and at least one circuit board terminal on the circuit board, and by using a lap metal plate (one end connected to the pin of the power converter's magnetic component, the other end installed between the magnetic component terminal and the circuit board terminal), the assembly complexity of the device is reduced. By using wiring screws to connect the magnetic component terminal, the circuit board terminal, and the lap metal plate together, the structure ensures a tight connection between the three, guaranteeing efficient current transmission and constructing a complete electrical connection path. Through the above configuration, this embodiment of the invention improves the power density of the product, reduces the assembly difficulty and subsequent maintenance costs, and enhances the maintainability and reliability of the device.

[0043] In an alternative embodiment, the mounting position of the power converter magnet 10 at least partially overlaps with the projection of the circuit board 20.

[0044] Specifically, the circuit board 20 and the power converter magnet 10 are respectively fixed inside the housing 40 of the energy storage device, and along the direction perpendicular to the circuit board 20, the circuit board 20 and the power converter magnet 10 at least partially overlap in projection. This layout is different from that of... Figure 1 The connection components of the power converter magnets in the prior art shown can arrange the internal structure more compactly, saving PCB space and reducing product volume, thereby increasing the power density of the product.

[0045] Optionally, the base 30 is installed parallel to the circuit board 20 and fixed inside the housing 40 of the energy storage device. Based on this, since the power converter magnet 10 and the circuit board 20 are parallel and fixed to the housing 40 of the energy storage device, their preset tolerances relative to the housing 40 are controllable during manufacturing. During installation, if the preset tolerances are greater than the tolerances generated during the installation of the power converter magnet 10 and the circuit board 20, it can be ensured that the circuit board terminals 21, the overlapping metal plate 50, and the magnet terminals 31 will not experience problems such as poor connection or weak connection due to tolerance accumulation when they are stacked and screwed together, thereby further ensuring the stability and reliability of the entire connection structure.

[0046] In an optional embodiment, the overlapping metal sheet 50 is "Z" shaped or "S" shaped.

[0047] Specifically, the "Z"-shaped or "S"-shaped overlapping metal sheets 50 have a height difference in the direction perpendicular to the circuit board 20. The cross-section of the overlapping metal sheet 50 on the first plane is "Z"-shaped or "S"-shaped, wherein the first plane is perpendicular to the circuit board 20 and parallel to the extension direction of the overlapping metal sheet 50. The "Z"-shaped or "S"-shaped cross-sectional structure further optimizes the stress absorption performance of the overlapping metal sheet 50. When subjected to stress, the "Z"-shaped overlapping metal sheet 50 can undergo elastic deformation in the direction perpendicular to the circuit board 20 and in the extension direction of the overlapping metal sheet 50, thereby more effectively dispersing and absorbing stress. The "S"-shaped cross-sectional structure of the overlapping metal sheet 50 has a more continuous and smooth deformation capability, which can more flexibly adapt to changes in stress direction. It absorbs stress through continuous bending deformation, making the internal stress distribution of the overlapping metal sheet 50 more uniform, further improving its ability to relieve stress at the solder joint, extending its service life, and reducing the risk of equipment failure due to connection problems.

[0048] For example, when the overlapping metal sheet 50 is connected to the wiring pin 33 by welding, stress will inevitably be generated at the solder joint. At this time, the overlapping metal sheet 50 can adaptively adjust its shape by virtue of its own elastic deformation capability, so as to alleviate the local stress concentration caused by factors such as thermal expansion and contraction and mechanical connection at the solder joint, and ensure the stability and reliability of the connection part.

[0049] Optionally, the magnetic terminal 31 and the circuit board terminal 21 are nuts.

[0050] Specifically, when the magnetic terminal 31 and the circuit board terminal 21 are nuts, the thread size, pitch and other parameters of the nuts must be completely consistent with the terminal screw 51 to ensure that the two can be tightly screwed together to achieve good mechanical connection and electrical conduction.

[0051] Optionally, the base 30 can be made of insulating material.

[0052] Specifically, when the base 30 is an insulating base, the base 30 also serves as an electrical isolation unit, specifically used together with the housing 40 of the energy storage device to ensure that the electromagnetic conversion process generated by the power converter magnetic component 10 is not affected by external electric fields or other electrical interference.

[0053] like Figure 3As shown, in an optional embodiment, the base 30 is provided with four positioning holes 32, two of which are located on one side of the mounting portion of the power converter magnet 10 on the base 30, and the other two positioning holes 32 are located on the other side of the mounting portion of the power converter magnet 10 on the base 30; the housing is formed with four positioning pins 41, the positions of the four positioning pins 41 corresponding to the positions of the four positioning holes 32.

[0054] For details, please refer to Figure 2 and Figure 3 To ensure proper installation of the power converter magnet 10, the base 30 housing the power converter magnet 10 has four positioning holes, arranged in pairs along the two edges of the base to ensure that the positioning pins 41 do not interfere with the power converter magnet 10. Correspondingly, the outer casing has four positioning pins 41 positioned opposite the four positioning holes 32. Furthermore, as... Figure 3 The spacing between the positioning holes 32 on both sides can be set differently to prevent operators from placing the base in the wrong direction. During installation, the operator first places the outer casing 40 of the energy storage device on the workbench, and then determines the placement position of the base 30 by the position of the positioning pin 41. This ensures that when the base 30 is installed, the positioning pin 41 can be smoothly inserted into the positioning hole 32 to achieve positioning of the base 30, preventing relative displacement between the base 30 and the outer casing, and ensuring the reliability and stability of the equipment.

[0055] Optionally, two electrical connections are formed between the power converter magnet 10 and the circuit board 20 through two magnetic terminal blocks 31, two circuit board terminal blocks 21, two overlapping metal plates 50, and two wiring screws 51.

[0056] Specifically, the lap metal piece 50 includes a positive lap metal piece and a negative lap metal piece, the magnetic component terminal 31 includes a positive magnetic component terminal and a negative magnetic component terminal, and the circuit board terminal 21 includes a positive circuit board terminal and a negative circuit board terminal. Correspondingly, the wiring pin 33 includes a magnetic component positive pin and a magnetic component negative pin. The positive and negative poles of the wiring pin 33, the lap metal piece 50, the magnetic component terminal 31, and the circuit board terminal 21 are structurally identical and are used to connect the positive and negative poles of the power supply, respectively.

[0057] In this embodiment of the invention, when the base 30 and the circuit board 20 are in a preset position within the housing 40 of the energy storage device, the two magnetic terminal blocks 31, the two overlapping metal plates 50, and the two circuit board terminal blocks 21 are automatically aligned. At this point, the installer only needs to install the wiring screws 51 to complete the operation, greatly simplifying the installation process and improving installation efficiency. Furthermore, in... Figure 1In the existing technology shown, the installer needs to first combine the cable with the wiring screw 51, and then screw it onto the circuit board terminal 21; or they need to use one hand to fix the cable and circuit board terminal 21 in the corresponding position, and then use the other hand to place the wiring screw 51 in the screw position, and finally use a tool to tighten the wiring screw 51. This cumbersome operation process is not only time-consuming, but also increases the difficulty of the installer's work and the probability of errors.

[0058] like Figure 2 As shown, this utility model embodiment also provides a power converter for energy storage devices, including a connection component for the power converter magnetic component provided in any of the above embodiments, possessing all the beneficial effects of the connection component for the power converter magnetic component, and the same parts will not be described again.

[0059] Based on the above implementation examples, this utility model embodiment also provides an energy storage device, including at least one power converter. The power converter includes a connection component for the power converter magnetic element provided in any of the above embodiments, and has all the beneficial effects of the connection component for the power converter magnetic element. The same parts will not be described again.

[0060] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A connection assembly for a power converter magnetic component, the power converter magnetic component being used in an energy storage device, the connection assembly being used to connect the power converter magnetic component to a circuit board of the energy storage device, characterized in that, The connection component includes: A base, wherein the base is provided with two or more positioning holes, and the power converter magnetic component is fixed to the base; Two or more locating pins are formed in the outer casing of the energy storage device; the mounting position of the base inside the energy storage device is positioned by the cooperation of the locating pins with the locating holes. At least one magnetic terminal block is disposed on the base; At least one circuit board terminal is provided on the circuit board; A metal plate is used for bonding, one end of which is connected to the wiring pin of the power converter magnetic component, and the other end of which is installed between the wiring terminal of the magnetic component and the wiring terminal of the circuit board. A wiring screw connects the magnetic component terminal, the circuit board terminal, and the lap metal plate together.

2. The connection assembly for the power converter magnetic component according to claim 1, characterized in that, The mounting position of the power converter magnet overlaps at least partially with the projection of the circuit board.

3. The connection assembly for the power converter magnetic component according to claim 1, characterized in that, The base is mounted parallel to the circuit board.

4. The connection assembly for the power converter magnetic component according to claim 1, characterized in that, The overlapping metal sheets are "Z" shaped or "S" shaped.

5. The connection assembly for the power converter magnetic component according to claim 1, characterized in that, The magnetic component terminals and the circuit board terminals are nuts.

6. The connection assembly for the power converter magnetic component according to claim 1, characterized in that, The base is made of insulating material.

7. The connection assembly for the power converter magnetic component according to claim 1, characterized in that, The base is provided with four positioning holes, two of which are located on one side of the mounting part of the power converter magnet on the base, and the other two are located on the other side of the mounting part of the power converter magnet on the base; the outer shell is formed with four positioning pins, and the positions of the four positioning pins correspond to the positions of the four positioning holes.

8. The connection assembly for the power converter magnetic component according to claim 1, characterized in that, Two electrical connections are formed between the power converter magnet and the circuit board via two magnetic component terminals, two circuit board terminals, two overlapping metal plates, and two wiring screws.

9. A power converter for an energy storage device, characterized in that, The power converter includes a connection assembly for the power converter magnet as described in any one of claims 1 to 8.

10. An energy storage device, comprising at least one power converter, characterized in that, The power converter includes a connection assembly for the power converter magnet as described in any one of claims 1 to 8.

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