Crimping type module electrode

Abstract

The utility model relates to the field of power electronic devices, in particular to a crimping type module electrode. The electrode comprises a pole plate and a pressing block arranged on the upper surface of the pole plate, the pressing block comprises an inner pressing block fixedly connected with the upper surface of the pole plate, a plurality of outer pressing blocks which are sequentially, tightly and slidably connected are concentrically arranged on the periphery of the inner pressing block in the axial direction, and the outer pressing blocks are all connected with elastic modules; before the pressing blocks are connected in a pressing mode, the outer pressing blocks are sequentially lifted under the action of the elastic modules from the center of the inner pressing block to the outermost layer, and after the pressing blocks are connected in a pressing mode, the outer pressing blocks corresponding to the pressing connection positions are sequentially pressed to be flush with the upper surfaces of the inner pressing blocks. According to the structure provided by the utility model, the electrode can adapt to different working conditions such as thermal expansion and mechanical vibration by dynamically adjusting the height of the outer pressing block, so that stable contact pressure is maintained, the electrical connection stability and the mechanical fixation reliability of the module electrode are improved, and the service life of a power electronic device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of power electronic devices, specifically to a press-fit modular electrode. Background Technology

[0002] In the field of power electronic devices, press-fit modular electrodes serve as a crucial connection component, primarily functioning to achieve electrical connections and mechanical fixation within these devices. Traditional press-fit modular electrodes typically consist of a single pressure block and an electrode plate. This structure is prone to poor contact and unstable connections under conditions of high current or harsh operating conditions such as thermal cycling and mechanical vibration. Specifically, the contact area between the pressure block and the electrode plate in the existing patent CN2831429Y structure is fixed, making it impossible to dynamically adjust the pressure according to actual operating conditions. This leads to increased contact resistance under high current density or thermal expansion, affecting device performance and lifespan. Furthermore, the single pressure block structure struggles to maintain stable elastic pressure under mechanical vibration or impact, easily causing wear or fatigue damage to the contact surface, further impacting connection reliability.

[0003] Therefore, it is necessary to develop a new type of press-fit modular electrode that can maintain a simple structure and low manufacturing cost, while providing stable electrical connection and mechanical fixation under various working conditions. Utility Model Content

[0004] The purpose of this invention is to provide a press-fit modular electrode to solve the technical problems of unstable contact, susceptibility to thermal expansion and mechanical vibration under dynamic working conditions of traditional press-fit modular electrodes.

[0005] To achieve the above objectives, the following technical solution is adopted.

[0006] A press-fit modular electrode includes: an electrode plate and a pressing block disposed on the upper surface of the electrode plate. The pressing block includes an inner pressing block fixedly connected to the upper surface of the electrode plate, and a plurality of outer pressing blocks concentrically disposed around the outer periphery of the inner pressing block and slidably connected in sequence. Each outer pressing block is connected to an elastic module. Before the pressing blocks are pressed, the outer pressing blocks rise sequentially from the center of the inner pressing block to the outermost layer under the action of the elastic modules. After the pressing blocks are pressed, the outer pressing blocks at the corresponding pressing positions are pressed sequentially until they are flush with the upper surface of the inner pressing block.

[0007] Optionally, there are two pressure blocks, which are installed at intervals on the upper surface of the electrode plate.

[0008] Optionally, a slider is provided on the outer periphery of the inner pressure block near the upper surface, and a groove is provided on the inner periphery of the corresponding outer pressure block at the position of the slider, the groove penetrating the upper surface; the slider is provided on the outer periphery of the relatively inner outer pressure block near the upper surface; the groove is provided on the inner periphery of the relatively outer outer pressure block at the position of the slider of the relatively inner outer pressure block.

[0009] Optionally, the elastic module is an insulating elastic element.

[0010] Optionally, the height of the outer pressure block is less than the height of the inner pressure block, and the elastic module is disposed between the lower surface of the outer pressure block and the electrode plate.

[0011] Optionally, the elastic module is disposed in the slide groove, and the elastic module is connected to the bottom of the slider and the bottom of the slide groove.

[0012] Optionally, the inner pressure block has a through hole in its central axis, and the electrode plate has a wire hole on its side, which is connected to the through hole.

[0013] Optionally, the inner pressure block is cylindrical, and the outer pressure block is annular.

[0014] Optionally, a gasket or spring sheet is provided on the lower surface of the electrode plate.

[0015] Optionally, the inner pressure block is integrally connected to the electrode plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The electrode of this invention includes an electrode plate and a pressing block disposed on the upper surface of the electrode plate. The pressing block consists of an inner pressing block and multiple outer pressing blocks, which are concentrically arranged along the axial direction and slidably connected in sequence. Each outer pressing block is connected to an elastic module, which allows the outer pressing block to rise sequentially from the center of the inner pressing block to the outermost layer under the action of the elastic module. This enables dynamic adjustment of the contact pressure before and after pressing, ensuring contact stability under different conditions.

[0018] The structure proposed in this invention dynamically adjusts the height of the external pressure block, enabling the electrodes to adapt to different working conditions, such as thermal expansion and mechanical vibration, thereby maintaining stable contact pressure and low contact resistance. This design significantly improves the electrical connection stability and mechanical fixation reliability of the module electrodes, extending the service life of power electronic devices.

[0019] By setting multiple external pressure blocks and elastic modules, this invention enables the electrodes to uniformly distribute pressure under high current density, reducing local overheating and stress concentration, and improving the thermal management and mechanical stability of the module.

[0020] The design of this utility model is simple and ingenious. Through the sliding connection of the outer pressure block and the cooperation of the elastic module, the pressure can be adaptively adjusted without the need for a complex mechanical structure or an additional power source, thus reducing manufacturing costs and maintenance difficulties.

[0021] The introduction of a slider and groove structure allows the outer pressure block to slide flexibly along the axial direction, improving its adaptability to different deformation conditions while maintaining structural compactness and reliability. The height of the outer pressure block is less than that of the inner pressure block, and in conjunction with the elastic module, this ensures that the outer pressure block is flush with the upper surface of the inner pressure block after pressing, guaranteeing uniform and stable contact. Placing the elastic module in the groove protects it from external damage and facilitates its installation and maintenance, improving the overall maintenance convenience of the electrode. Using an insulating elastic element as the elastic module not only provides the necessary elastic pressure but also enhances the electrode's insulation performance, preventing the risk of electrical short circuits. The through-hole in the central axial direction of the inner pressure block connects to the wire hole on the side of the electrode plate, providing an efficient electrical connection path, simplifying the electrode assembly process, and improving the efficiency of the electrical connection. The cylindrical inner pressure block and the annular outer pressure block design give the electrode good symmetry and uniform stress distribution, improving the electrode's structural stability and durability. A gasket or spring is placed on the lower surface of the electrode plate, providing additional support and cushioning, reducing the direct pressure on the electrode plate, and extending the electrode's service life. The internal pressure block is integrated with the electrode plate, enhancing the overall strength and rigidity of the electrode, enabling it to withstand greater mechanical stress, and improving its reliability and durability.

[0022] In summary, the press-fit modular electrode proposed in this invention, through its innovative structural design, significantly improves the electrical connection stability and mechanical fixation reliability of power electronic devices while maintaining structural simplicity and low cost, and has important practical value and broad application prospects. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the unpressurized state structure of an embodiment of the press-fit modular electrode of this utility model.

[0024] Figure 2 This is a schematic diagram of the crimped state structure of an embodiment of the crimped modular electrode of this utility model.

[0025] Figure 3 This is a schematic diagram of the disassembled structure of an embodiment of a press-fit modular electrode according to the present invention.

[0026] Among them: 1. Electrode plate; 2. Press block; 21. Inner press block; 22. Outer press block; 23. Through hole; 24. Elastic module; 25. Slider; 26. Slide groove; 3. Wire hole. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0028] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention.

[0029] like Figures 1 to 3 As shown, a press-fit modular electrode specifically includes an electrode plate 1 and a pressing block 2. The electrode plate 1 serves as the basic structure, and the pressing block 2 is provided on its upper surface. The pressing block 2 consists of an inner pressing block 21 and multiple outer pressing blocks 22, with the inner pressing block 21 fixedly connected to the upper surface of the electrode plate 1. The inner pressing block 21 is cylindrical, and multiple outer pressing blocks 22 are arranged concentrically along its outer periphery along the axial direction and are connected in a tightly slidable manner. Each outer pressing block 22 is connected to an elastic module 24, which can be a spring, a rubber pad, or other type of elastic element. Its function is to allow the outer pressing blocks 22 to rise sequentially from the center of the inner pressing block 21 to the outermost layer before the pressing block 2 is pressed, forming a prestressed state.

[0030] During the crimping process, when the pressure block 2 is subjected to external pressure, the outer pressure blocks 22, under the action of the elastic module 24, are pressed sequentially to be flush with the upper surface of the inner pressure block 21 at the corresponding crimping positions. This design allows the pressure block 2 to adapt to different crimping depths, ensuring that each outer pressure block 22 can contact the electrode plate 1 evenly during the crimping process, thereby providing stable electrical connection and mechanical fixation.

[0031] The elastic module 24 is disposed between the lower surface of the outer pressure block 22 and the electrode plate 1, or disposed in the groove 26, to provide a stable elastic force. The material of the elastic module 24 should have good insulation properties to ensure electrical isolation between the electrodes; therefore, the elastic module 24 can be made of insulating rubber, silicone, or other insulating elastic materials. The elastic module 24 is an insulating elastic element. It ensures that while providing the necessary elastic pressure, it maintains electrical isolation between the electrodes, preventing electrical short circuits or other potential electrical faults. The material selected for the elastic module 24 should have good insulation properties and sufficient elasticity to provide a stable preload force. Specific insulating elastic materials can include, but are not limited to, rubber, silicone, polytetrafluoroethylene (PTFE), polyimide (PI), or other engineering plastics of varying insulation grades. These materials not only have excellent insulation properties but also maintain stable physical properties under a wide range of temperature and humidity conditions. The specific shape of the elastic module 24 can be a compression spring, a corrugated washer, a rubber pad, or other elastic structure suitable for providing preload force. The elastic module 24 provides a stable elastic force. This allows the outer pressure block 22 to rise sequentially from the center of the inner pressure block 21 to the outermost layer under the action of the elastic module 24, and to be pressed flush with the upper surface of the inner pressure block 21 after pressing.

[0032] In practical applications, the pressing of the pressure block 2 is accomplished using a dedicated pressing tool, which can be a hydraulic or pneumatic pressing machine. This tool provides uniform and stable pressure, ensuring that the outer pressure block 22 is evenly pressed onto the upper surface of the inner pressure block 21. After pressing, the restoring force of the elastic module 24 keeps the outer pressure block 22 in close contact with the electrode plate 1, thereby ensuring long-term electrical and mechanical stability.

[0033] In summary, the press-fit modular electrode of this embodiment, through its unique press block 2 structural design, achieves stable electrical connection and mechanical fixation under different working conditions, exhibiting excellent adaptability and reliability, and is suitable for the connection needs of various power electronic devices.

[0034] As a preferred example, the press-fit modular electrode includes two pressing blocks 2, which are spaced apart and mounted on the upper surface of the electrode plate 1. Specifically, these two pressing blocks 2 are referred to as the first pressing block 2 and the second pressing block 2, respectively, and they correspond to two different regions of the electrode plate 1 to achieve uniformly distributed pressure and current transmission. The first pressing block 2 and the second pressing block 2 have the same structure.

[0035] As a specific example, to achieve the above structure, the crimp-type modular electrode in this embodiment further refines the connection mechanism between the inner pressure block 21 and the outer pressure block 22. Specifically, sliders 25 are provided on the outer periphery of the inner pressure block 21 near its upper surface. These sliders 25 are designed to cooperate with the grooves 26 of the outer pressure block 22. Each outer pressure block 22 has a groove 26 on its inner periphery corresponding to the position of the slider 25 of the inner pressure block 21. These grooves 26 penetrate the upper surface of the outer pressure block 22, allowing the sliders 25 of the inner pressure block 21 to be inserted into them, thereby achieving a sliding connection between the inner pressure block 21 and the outer pressure block 22.

[0036] To achieve the concentric arrangement and sliding connection of the multiple outer pressure blocks 22, sliders 25 are also provided on the outer periphery of the inner outer pressure block 22 near the upper surface. These sliders 25 cooperate with the sliding grooves 26 on the inner periphery of the outer outer pressure block 22. In this way, each outer pressure block 22 can be slidably connected to the adjacent pressure block 2 through the structure of the sliders 25 and the sliding grooves 26, forming a multi-layer structure that can slide concentrically along the axial direction.

[0037] The slider 25 can be rectangular, circular, or other shapes suitable for sliding, and its dimensions precisely match the dimensions of the groove 26 to ensure the stability and smoothness of the sliding connection. The material selection for the slider 25 needs to take into account wear resistance and chemical resistance to ensure long-term stable sliding performance; materials such as metals or engineering plastics are typically selected.

[0038] The design of the groove 26 needs to consider sufficient strength and durability to withstand repeated sliding and pressure. The size and shape of the groove 26 need to be precisely controlled to ensure that the slider 25 can be smoothly inserted and slid, while maintaining sufficient friction to prevent relative sliding under external forces.

[0039] Through the above implementation method, this crimp-type modular electrode achieves a tight sliding connection between the inner pressure block 21 and the outer pressure block 22 by utilizing the cooperation of the slider 25 and the groove 26. This allows the outer pressure block 22 to slide concentrically along the axial direction under the action of the elastic module 24, thereby dynamically adjusting the contact pressure before and after crimping and ensuring the stability and reliability of the electrode. This structural design not only improves the adaptability of the electrode but also enhances its performance under different working conditions.

[0040] As a preferred example, the elastic module 24 can be disposed within the groove 26. This not only ensures the stability and protection of the elastic module 24 but also provides a compact and efficient elastic force transmission mechanism. The elastic module 24 is designed to adapt to the shape and size of the groove 26. The elastic module 24 connects the bottom of the slider 25 and the bottom of the groove 26.

[0041] As a specific example, the height of the outer pressure block 22 is less than the height of the inner pressure block 21. This design allows the outer pressure block 22 to be flush with the upper surface of the inner pressure block 21 during the pressing process, ensuring uniform contact between the electrodes after pressing, thereby providing a stable electrical connection. The elastic module 24 can be set between the lower surface of the outer pressure block 22 and the electrode plate 1.

[0042] As a specific example, the inner pressure block 21 is designed as a hollow structure with a through hole 23 axially located at its center. This through hole 23 extends through the inner pressure block 21 and is used to receive and secure wires or cables, ensuring the stability of the electrical connection. The diameter and length of the through hole 23 are precisely designed according to the dimensions of the wires or cables to ensure proper fit and fixation. The electrode plate 1 forms the basic structure of the module electrode, and a wire hole is provided on its side. The position and size of the wire hole correspond to the through hole 23 at the center of the inner pressure block 21, ensuring that the two can be connected. The wire hole not only provides a passage for wires to enter and exit but also helps with heat dissipation and reduces the impedance of the electrical connection.

[0043] As a concrete example, the cylindrical design of the inner pressure block 21 provides a centrally symmetrical pressure distribution area, which helps to maintain a uniform pressure distribution during the crimping process. The diameter and height of the cylindrical inner pressure block 21 are precisely designed according to the required electrical connection and mechanical strength requirements. The outer peripheral surface of the inner pressure block 21 is provided with sliders 25, which cooperate with the grooves 26 of the outer pressure block 22, allowing the outer pressure block 22 to slide concentrically along the axial direction.

[0044] The annular design of the outer pressure block 22 allows it to be tightly arranged around the cylindrical surface of the inner pressure block 21. The height of each annular outer pressure block 22 is less than the height of the inner pressure block 21. This design allows the outer pressure blocks 22 to be flush with the upper surface of the inner pressure block 21 after pressing, ensuring consistent and uniform contact. The inner and outer diameters of the annular outer pressure blocks 22 are designed according to the diameter of the inner pressure block 21 and the required pressure distribution to ensure that the outer pressure blocks 22 can fit tightly and distribute pressure evenly.

[0045] As a preferred example, in this embodiment, the lower surface of the electrode plate 1 is provided with gaskets or springs. These gaskets or springs can be single or multiple, evenly distributed on the lower surface of the electrode plate 1 to ensure uniform contact with the underlying structure. The material of the gaskets or springs should have good insulation properties and mechanical strength. The specific shape of the gaskets or springs can be circular, square, or other suitable shapes, and their dimensions and thickness are precisely designed according to the required support force and insulation requirements. The gaskets or springs can be solid or have protrusions or grooves to increase the contact area with the lower surface of the electrode plate 1 and improve stability.

[0046] As a preferred example, the inner pressure block 21 is integrally connected to the electrode plate 1. This enhances the structural stability and mechanical strength of the module electrode, while simplifying the manufacturing and assembly process.

[0047] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the above-disclosed embodiments are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A press-fit modular electrode, characterized in that, include: The electrode plate (1) and the pressure block (2) disposed on the upper surface of the electrode plate (1) are provided. The pressure block (2) includes an inner pressure block (21) fixedly connected to the upper surface of the electrode plate (1). Multiple outer pressure blocks (22) are concentrically disposed on the outer periphery of the inner pressure block (21) and are slidably connected in sequence. Each outer pressure block (22) is connected to an elastic module (24). Before the pressure block (2) is pressed, the outer pressure blocks (22) rise sequentially from the center of the inner pressure block (21) to the outermost layer under the action of the elastic module (24). After the pressure block (2) is pressed, the outer pressure blocks (22) corresponding to the pressing position are pressed sequentially until they are flush with the upper surface of the inner pressure block (21).

2. The press-fit modular electrode according to claim 1, characterized in that, There are two pressure blocks (2), which are installed at intervals on the upper surface of the electrode plate (1).

3. The press-fit modular electrode according to claim 1, characterized in that, The inner pressure block (21) has a slider (25) located near the upper surface on its outer periphery. The corresponding outer pressure block (22) has a groove (26) located on its inner periphery corresponding to the slider (25), and the groove (26) penetrates the upper surface. The slider (25) is located near the upper surface on the outer periphery of the inner side of the outer pressure block (22). The groove (26) is located on the inner periphery of the outer pressure block (22) corresponding to the slider (25) of the outer pressure block (22) on the outer side.

4. A press-fit modular electrode according to claim 1, characterized in that, The elastic module (24) is an insulating elastic element.

5. A press-fit modular electrode according to claim 1, characterized in that, The height of the outer pressure block (22) is less than the height of the inner pressure block (21), and the elastic module (24) is disposed between the lower surface of the outer pressure block (22) and the electrode plate (1).

6. A press-fit modular electrode according to claim 3, characterized in that, The elastic module (24) is disposed in the slide groove (26), and the elastic module (24) connects the bottom of the slider (25) and the bottom of the slide groove (26).

7. A press-fit modular electrode according to claim 1, characterized in that, The inner pressure block (21) has a through hole (23) axially arranged in the center, and the electrode plate (1) has a wire hole on its side, which is connected to the through hole (23).

8. A press-fit modular electrode according to claim 1, characterized in that, The inner pressure block (21) is cylindrical, and the outer pressure block (22) is annular.

9. A press-fit modular electrode according to claim 1, characterized in that, The lower surface of the electrode plate (1) is provided with a gasket or spring.

10. A press-fit modular electrode according to claim 1, characterized in that, The inner pressure block (21) is integrally connected with the electrode plate (1).

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