IGBT (Insulated Gate Bipolar Translator) wiring bridge mounting structure

Abstract

The utility model discloses an IGBT (Insulated Gate Bipolar Translator) wiring bridge mounting structure. The IGBT lap bridge installation structure comprises an IGBT module, a laminated positive busbar, a laminated negative busbar and a conducting bar, the IGBT module is provided with a positive pin and a negative pin, the laminated negative busbar is located below the laminated positive busbar and distributed in a staggered mode, the laminated negative busbar is connected to the negative pin, the conducting bar is arranged on the left side of the laminated positive busbar, one end of the conducting bar is connected to the laminated positive busbar, and the other end of the conducting bar is connected to the laminated negative busbar. And the other end is connected to the positive pin and the laminated positive busbar. According to the utility model, more uniform current distribution can be realized through the shunting effect of the conducting bar, and the conducting bar is used as an additional current channel, so that the current pressure borne by a single pin is effectively reduced, and the current sharing effect among the pins is remarkably improved; in addition, the conducting bar increases the current-carrying capacity of a narrow pin area and provides an extra heat dissipation area, so that the heat dissipation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to IGBT line connection technical field especially relates to a kind of IGBT line connection bridge installation structure. BACKGROUND

[0002] IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor) as a kind of full-control voltage-driven power semiconductor device, plays a vital role in modern power electronic system. Its unique input impedance is high, control power is small, switching frequency is high, conduction current is large and conduction loss is small and other characteristics, so that IGBT is widely used in frequency converter, wind power generation converter, electric vehicle driving system and many other high-power density and high efficiency requirement fields.

[0003] In frequency converter inverter circuit, in order to improve output power and system stability, commonly used in parallel mode of multiple IGBT. This parallel mode is realized by the lamination busbar (Laminated Busbar) of the lap joint and the parallel connection of DC bus. As a kind of high-efficiency electric energy transmission structure, laminated busbar can effectively reduce energy loss and electromagnetic interference, improve the overall performance of the system.

[0004] However, in the scene of IGBT parallel use, the current sharing problem and the heat dissipation problem become the key factors restricting the system performance. The current sharing problem mainly reflects the uneven distribution of IGBT DC input side current, which may be due to the limitation of the overall size of frequency converter and the unreasonable form of laminated busbar lap joint. Especially the laminated busbar near the two sides of the cabinet, due to the space limitation, the pin width of its lap joint with IGBT is often small, which affects the current sharing effect. In addition, due to the reduction of lap joint pin width, the current-carrying capacity of lap joint pin will also be reduced accordingly, which leads to local high temperature, affecting the performance and reliability of IGBT.

[0005] For the problem of poor current sharing effect of IGBT DC side laminated busbar lap joint and local high temperature caused by temperature rise of two sides of pin, there are some solutions at present, but all have certain limitations.

[0006] Scheme one: by setting single contact surface L type conductive row in laminated busbar narrow pin area, and fixed in narrow pin place, to increase the heat conduction area of this area, so as to alleviate the problem of local high temperature. However, the implementation effect of this scheme is limited, and only a slight cooling effect can be achieved on the local high temperature area, and the overall current sharing and heat dissipation performance cannot be improved significantly.

[0007] Scheme two: a rectangular heat sink is arranged below the narrow pin area of the laminated busbar, and a sticky heat-conducting insulating paper is used to realize heat conduction of the narrow pin area. Although this scheme has obvious heat dissipation effect on the narrow pin area, it still faces the problems of installation reliability and convenience of the heat-conducting insulating paper and the heat sink. The installation of the heat-conducting insulating paper needs to ensure good adhesion and sealing to avoid the risk of heat leakage and electrical short circuit, and the installation of the heat sink needs to consider factors such as weight, size and compatibility with the laminated busbar, which makes the implementation cost of the overall scheme relatively high and the cost performance relatively low. Utility model content

[0008] The utility model discloses a kind of IGBT bridge installation structures of line, which is to overcome the deficiencies of prior art.

[0009] To solve the above technical problems, the utility model adopts the following technical scheme:

[0010] The utility model discloses a kind of IGBT bridge installation structures of line, which is to overcome the deficiencies of prior art.

[0011] In a specific embodiment, the conductive row is provided with a first lap joint part and a second lap joint part, the first lap joint part is connected to the laminated positive busbar, and the second lap joint part is connected to the positive pin and the laminated positive busbar.

[0012] In a specific embodiment, the first lap joint part is provided with a first waist hole, and the second lap joint part is provided with a second waist hole; wherein the laminated positive busbar and the first lap joint part are connected by cooperating with the first waist hole through a screw; and the positive pin, the laminated positive busbar and the second lap joint part are connected by cooperating with the second waist hole through a bolt.

[0013] In a specific embodiment, the screw is matched with a flat washer, a spring washer and a nut to form a fixed connection between the laminated positive busbar and the first lap joint part; and the bolt is matched with a flat washer, a spring washer and a nut to form a fixed connection between the positive pin, the laminated positive busbar and the second lap joint part.

[0014] In a specific embodiment, an avoidance area is formed between the first lap joint part and the second lap joint part.

[0015] In a specific embodiment, the conductive bar includes a body, the first lap joint connected to a side of the body, and the second lap joint connected to a bottom of the body.

[0016] In a specific embodiment, the first lap joint and the second lap joint are both formed in an L shape with the body.

[0017] In a specific embodiment, the body, the first lap joint and the second lap joint are integrally formed.

[0018] In a specific embodiment, an insulating film is further arranged between the laminated positive bus bar and the laminated negative bus bar.

[0019] In a specific embodiment, the conductive bar is made of copper or aluminum metal.

[0020] The IGBT bridge installation structure of the utility model has the beneficial effects compared with the prior art: the conductive bar is introduced as a bridge, one end of which is connected to the laminated positive bus bar, and the other end is simultaneously connected to the positive pin of the IGBT module and the laminated positive bus bar, which makes the narrow pin area that may cause poor current sharing due to the small pin width realize more uniform current distribution through the shunt effect of the conductive bar, effectively reduces the current pressure borne by the single pin, thereby significantly improving the current sharing effect between the pins; in addition, the conductive bar not only plays a shunt role, but also further increases the current carrying capacity of the narrow pin area, as the conductive bar has excellent conductivity, it can ensure the stability and efficiency of the current in the transmission process, thereby improving the current carrying capacity of the entire IGBT module; at the same time, the conductive bar as an additional heat dissipation area effectively improves the heat dissipation efficiency of the narrow pin area, when the current passes through the conductive bar, the heat generated can be quickly conducted to the surrounding environment through the conductive bar, reducing the local temperature of the pin lap joint, which not only prolongs the service life of the IGBT module, but also improves the overall stability and reliability of the system.

[0021] The utility model will be further described below in combination with the drawings and specific embodiments. DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0023] Figure 1The utility model provides a three -dimensional schematic view of IGBT bridge installation structure of line of the utility model provides.

[0024] Figure 2 The utility model provides a three -dimensional schematic view of IGBT bridge installation structure of line of the utility model provides.

[0025] Figure 3 The utility model provides a three -dimensional schematic view of IGBT bridge installation structure of line of the utility model provides. Specific embodiments

[0026] In order to make the utility model's purpose, technical scheme and advantage more clear, below, combining with the specific embodiment of the utility model and the specific embodiment of the utility model, the utility model is further detailed.

[0027] The technical scheme in the embodiment of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiment of the utility model, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment of the utility model. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor are within the protection scope of the utility model.

[0028] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0030] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be the connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through the intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them.Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification.

[0033] Referring to Figures 1 to 3 The utility model discloses a kind of IGBT bridge installation structures of line, comprising: IGBT module 10, laminated positive busbar 20, laminated negative busbar 30 and conductive row 40, the IGBT module 10 is equipped with positive pin (not shown in drawing) and negative pin (not shown in drawing), the laminated negative busbar 30 is located below the laminated positive busbar 20, and staggered distribution, the laminated negative busbar 30 is connected to the negative pin, the conductive row 40 is located at the left side of the laminated positive busbar 20, and one end of the conductive row 40 is connected to the laminated positive busbar 20, the other end is connected to the positive pin and the laminated positive busbar 20.

[0034] Specifically, by introducing the conductive bar 40 as a wire bridge, connecting one end to the laminated positive busbar 20 and the other end to the positive pin of the IGBT module 10 and the laminated positive busbar 20 at the same time, this design makes the narrow pin area that may cause poor current sharing due to the small pin width, can achieve more uniform current distribution through the shunt effect of the conductive bar 40. The conductive bar 40 as an additional current channel effectively reduces the current pressure borne by a single pin, thereby significantly improving the current sharing effect between pins. In addition, the conductive bar 40 not only plays a shunt role, but also further increases the current carrying capacity of the narrow pin area. Since the conductive bar 40 has excellent electrical conductivity, it can ensure the stability and efficiency of the current during transmission, thereby improving the current carrying capacity of the entire IGBT module 10. At the same time, the conductive bar 40 as an additional heat dissipation area effectively improves the heat dissipation efficiency of the narrow pin area. When the current passes through the conductive bar 40, the heat generated can be quickly conducted to the surrounding environment through the conductive bar 40, reducing the local temperature at the pin overlap. This design not only prolongs the service life of the IGBT module 10, but also improves the overall stability and reliability of the system. In addition, the staggered distribution design of the laminated positive busbar 20 and the laminated negative busbar 30 not only ensures the reliability of electrical connection, but also optimizes the spatial layout, making the entire installation structure more compact and efficient. This design not only saves valuable space resources, but also provides convenience for subsequent system maintenance and upgrading.

[0035] Referring to Figures 1 to 3 As shown in the drawings, in an embodiment, the conductive bar 40 is provided with a first overlap part 41 and a second overlap part 42. The first overlap part 41 is connected to the laminated positive busbar 20, and the second overlap part 42 is connected to the positive pin and the laminated positive busbar 20.

[0036] Specifically, the first lap joint 41 is the part where the conductive bar 40 is directly connected to the laminated positive busbar 20. To ensure good electrical connection and mechanical stability, the first lap joint 41 is usually designed to match the shape and size of the laminated positive busbar 20 and is fixed together by screws, welding or other reliable connection methods. This design can ensure efficient transmission of current between the conductive bar 40 and the laminated positive busbar 20, while reducing resistance and heat generated by poor contact. The second lap joint 42 is responsible for connecting the conductive bar 40 to the positive pin of the IGBT module 10 and another part of the laminated positive busbar 20. It is important to note that the second lap joint 42 not only connects to the positive pin, but also forms a parallel connection with the laminated positive busbar 20. This design allows current to flow freely between the conductive bar 40, the positive pin and the laminated positive busbar 20, achieving more uniform current distribution. To achieve this purpose, the second lap joint 42 needs to be designed with a certain shape and size to adapt to the space constraints between the positive pin and the laminated positive busbar 20, and reliable electrical connection is ensured through appropriate connection techniques such as bolt connection, welding or crimping.

[0037] More specifically, by setting the first lap joint 41 and the second lap joint 42, the current can flow more freely between the conductive bar 40, the positive pin and the laminated positive busbar 20. This design can significantly reduce the problem of uneven current distribution caused by the small width of the pin, thereby improving the current sharing effect of the entire IGBT module 10. In addition, since the conductive bar 40 acts as an additional current path, it can share the current originally carried by a single pin, significantly improving the current-carrying capacity of the IGBT module 10, which helps to improve the power density and efficiency of the entire power electronic system. In addition, the second lap joint 42 of the conductive bar 40 not only plays an electrical connection role, but also increases the heat exchange area with the surrounding environment. When current passes through the conductive bar 40, the heat generated can be more quickly conducted to the surrounding environment through the second lap joint 42, thereby reducing the operating temperature of the IGBT module 10. This design helps to improve the reliability and service life of the IGBT module 10.

[0038] Referring to Figures 2 to 3 As shown in the embodiment, the first lap joint 41 is provided with a first waist hole 411, and the second lap joint 42 is provided with a second waist hole 421. The laminated positive busbar 20 and the first lap joint 41 are connected by cooperating the screw 50 with the first waist hole 411. The positive pin, the laminated positive busbar 20 and the second lap joint 42 are connected by cooperating the bolt 60 with the second waist hole 421.

[0039] Specifically, the first waist hole 411 on the first lap joint 41 is a specially shaped hole designed to accommodate the installation position and space constraints of the laminated positive busbar 20, with the long axis direction allowing for adjustment of the position of the screw 50 within a certain range, thereby ensuring accurate alignment and close contact between the first lap joint 41 and the laminated positive busbar 20. The second waist hole 421 on the second lap joint 42 also has the function of adjusting the installation position, but here it also needs to accommodate the complex connection relationship between the positive pin and the laminated positive busbar 20, and the design of the second waist hole 421 allows the bolt 60 to adjust its position within a certain range to ensure that the second lap joint 42 can form good contact with both the positive pin and the laminated positive busbar 20.

[0040] More specifically, the design of the waist hole allows the first lap joint 41 and the second lap joint 42 to have greater flexibility during installation, which helps to adapt to different installation positions and space constraints, thereby simplifying the installation process and reducing the difficulty of installation. In addition, through the cooperation of the screw 50 and the bolt 60 with the waist hole, the first lap joint 41 and the laminated positive busbar 20, and the second lap joint 42 and the laminated positive busbar 20, the positive pin form a firm electrical connection and mechanical fixation, which not only ensures efficient transmission of current, but also provides sufficient mechanical strength to resist the effects of adverse factors such as vibration, impact and temperature changes. In addition, the parallel connection formed by the second lap joint 42 through the second waist hole 421 with the positive pin and the laminated positive busbar 20 helps to achieve uniform distribution of current, which can reduce the problem of local overheating caused by current concentration, thereby improving the reliability and service life of the IGBT module 10. In addition, the design of the waist hole also makes it easier to disassemble and replace components such as the conductive bus 40 or the laminated busbar when needed, which helps to simplify maintenance operations and reduce maintenance costs.

[0041] Referring to Figures 1 to 2 In an embodiment, the screw 50 cooperates with the flat washer 70, the elastic washer 80 and the nut 90 to form a fixed connection between the laminated positive busbar 20 and the first lap joint 41; the bolt 60 cooperates with the flat washer 70, the elastic washer 80 and the nut 90 to form a fixed connection between the positive pin, the laminated positive busbar 20 and the second lap joint 42.

[0042] Specifically, the screw 50 is used to connect the laminated positive busbar 20 and the first lap joint 41. The screw 50 first passes through the reserved hole on the laminated positive busbar 20, then passes through the first waist hole 411 on the first lap joint 41, and finally installs the flat washer 70, the elastic washer 80 and the nut 90 in sequence at the end of the screw 50. The flat washer 70 serves to increase the contact area between the screw 50 and the connecting component, preventing damage to the surface of the connecting component when the nut 90 loosens; the elastic washer 80 provides a certain pre-tightening force, which can maintain the stability of the connection under conditions such as vibration or temperature change; and the nut 90 is used to lock the entire connection structure. By tightening the nut 90, the screw 50, the flat washer 70, the elastic washer 80 and the nut 90 together form a firm fixed connection, firmly fixing the laminated positive busbar 20 on the first lap joint 41. This connection method not only ensures the reliability of the electrical connection, but also provides sufficient mechanical strength to resist various adverse factors.

[0043] Specifically, the bolt 60 is used to connect the positive pin, the laminated positive busbar 20 and the second lap joint 42. The bolt 60 first passes through the reserved hole on the positive pin, then passes through another reserved hole on the laminated positive busbar 20, and finally passes through the second waist hole 421 on the second lap joint 42. Similarly, the flat washer 70, the elastic washer 80 and the nut 90 are installed in sequence at the end of the bolt 60. By tightening the nut 90, the bolt 60, the flat washer 70, the elastic washer 80 and the nut 90 together form a parallel fixed connection, firmly connecting the positive pin, the laminated positive busbar 20 and the second lap joint 42 together. This connection method not only achieves uniform distribution of current, but also improves the stability and reliability of the entire connection structure.

[0044] More specifically, the use of the flat washer 70, the elastic washer 80 and the nut 90 in combination with the screw 50 or the bolt 60 enhances the stability of the connection. The pre-tightening force provided by the elastic washer 80 can resist the influence of adverse factors such as vibration and temperature change, thereby maintaining the tightness of the connection. The use of the flat washer 70 and the elastic washer 80 also increases the contact area between the screw 50 or the bolt 60 and the connecting component, and reduces the risk of damaging the surface of the connecting component due to loosening of the nut 90, which helps to improve the reliability and durability of the connection. The way the bolt 60 is connected ensures good contact between the positive pin, the laminated positive busbar 20 and the second lap joint 42, thereby achieving uniform distribution of current, which helps to reduce the problem of local overheating caused by current concentration and improves the reliability and service life of the IGBT module 10. In addition, although components such as the flat washer 70, the elastic washer 80 and the nut 90 are added, this connection method is still relatively simple and easy to maintain in actual operation. Once the components need to be disassembled or replaced, the nut 90 can be loosened and the screw 50 or the bolt 60 can be removed.

[0045] In this embodiment, the laminated negative busbar 30 is also fixedly connected with the negative pin through the bolt 60, the flat washer 70, the elastic washer 80, and the nut 90, which will not be described in detail here.

[0046] Referring to Figure 3 As shown in the drawings, in an embodiment, a space-avoiding area 43 is formed between the first lap joint portion 41 and the second lap joint portion 42.

[0047] Specifically, the space-avoiding area 43 refers to the gap or clearance intentionally left between the first lap joint portion 41 and the second lap joint portion 42 in structure. The design of this area aims to avoid the mutual interference of the first lap joint portion 41 and the second lap joint portion 42 during the connection process, while providing additional space for the narrow lap joint pin area of the laminated positive busbar 20 to achieve a wider lap joint area and better heat dissipation effect. In addition, the size and shape of the space-avoiding area 43 can be determined according to the actual laminated busbar structure design. For example, if the pin area of the laminated busbar is relatively narrow, the space-avoiding area 43 can be designed to be relatively large to ensure sufficient lap joint area and heat dissipation space. In traditional structures, the lap joint portion is usually designed to have a specific bending angle. However, in the present utility model, the first lap joint portion 41 and the second lap joint portion 42 are no longer limited to a certain specific value in terms of bending angle. On the contrary, they can be flexibly adjusted according to actual installation needs and space limitations. This flexibility enables the first lap joint portion 41 and the second lap joint portion 42 to better adapt to different laminated busbar structures, thereby achieving more optimized connection effect and heat dissipation performance. In some cases, even a single large-angle bending can be used directly to simplify the structure and reduce costs.

[0048] More specifically, by designing the space-avoiding area 43, additional space is provided for the narrow lap joint pin area of the laminated positive busbar 20, thereby achieving a wider lap joint area, which not only improves the transmission efficiency of the current but also enhances the stability of the connection. In addition, the design of the space-avoiding area 43 also helps to improve the heat dissipation performance of the narrow lap joint pin area of the laminated positive busbar 20, by increasing the heat dissipation area and providing heat dissipation channels, which can effectively reduce the temperature of this area, thereby improving the reliability and service life of the IGBT module 10. In addition, by giving the first lap joint portion 41 and the second lap joint portion 42 flexibility in bending angle, they can better adapt to different laminated busbar structures and installation needs. This flexibility not only simplifies the installation process but also improves the customizability and expandability of the entire IGBT lap joint bridge installation structure.

[0049] Referring to Figures 1 to 3 As shown in the drawings, in an embodiment, the conductive row 40 includes a body 44, the first lap joint portion 41 connected to the side of the body 44, and the second lap joint portion 42 connected to the bottom of the body 44.

[0050] Specifically, the first lap joint 41 is connected to the side of the body 44, typically by welding, screwing or other reliable connection means, and is designed to form a reliable electrical connection with other components, such as the laminated positive busbar 20, and to withstand certain mechanical stresses. The second lap joint 42 is connected to the bottom of the body 44, also by welding, screwing or other reliable connection means, and is designed to form an electrical connection with another component, such as a positive pin or other conductive element, and to ensure the stability and reliability of the connection.

[0051] More specifically, by connecting the first lap joint 41 and the second lap joint 42 to the side and the bottom of the body 44 respectively, a reliable electrical connection between the conductive busbar 40 and other components can be ensured, which not only improves the stability of the connection, but also reduces the failure rate caused by poor connection. The connection method of the first lap joint 41 and the second lap joint 42, such as welding, screwing, bolting, etc., usually has high mechanical strength, which can resist the influence of vibration, impact and other adverse factors, which helps to maintain the integrity and stability of the conductive busbar 40 structure. In addition, connecting the second lap joint 42 to the bottom of the body 44 helps to optimize the heat dissipation performance of the conductive busbar 40, and the heat generated when the current passes through the conductive busbar 40 can be dissipated faster through the second lap joint 42 or the body 44, thereby reducing the temperature of the conductive busbar 40 and improving the stability and reliability of the system. This design of the conductive busbar 40 allows the first lap joint 41 and the second lap joint 42 to be customized and adjusted according to actual needs. For example, different lap joint sizes and connection methods can be selected according to different installation space and connection requirements, which helps to improve the flexibility and adaptability of the design.

[0052] Referring to Figures 1 to 3 As shown in the embodiment, the first lap joint 41 and the second lap joint 42 form an L shape with the body 44.

[0053] Specifically, the first lap joint 41 extends from one side of the body 44 to form one leg of the L shape, which is usually used for transverse (or lateral) connection with other electrical elements or conductive busbars 40. The second lap joint 42 extends vertically from the bottom (or top, depending on the specific design) of the body 44 to form the other leg of the L shape, which is usually used for longitudinal (or vertical) connection with the ground, chassis or other conductive elements.

[0054] More specifically, the L-shaped design enables the first and second overlapping portions 41 and 42 to be firmly connected with different electrical elements or conductive strips 40, which not only improves the stability of the connection, but also reduces the failure rate caused by poor connection. In addition, the L-shaped design helps to reduce the uneven distribution of current in the conductive strips 40, thereby improving the efficiency and stability of the electrical connection. Furthermore, since the first and second overlapping portions 41 and 42 both form a right angle, this helps to reduce the concentration of current and heat at the connection, thereby prolonging the service life of the conductive strips 40. In addition, the L-shaped design increases the mechanical strength of the conductive strips 40, making them better able to withstand the effects of vibration, impact and other adverse factors, which helps to maintain the integrity and stability of the structure of the conductive strips 40, thereby improving the reliability of the entire electrical system.

[0055] In an embodiment, the body 44, the first overlapping portion 41 and the second overlapping portion 42 are integrally formed.

[0056] In particular, the integrally formed structure reduces the problem of electrical performance degradation caused by poor connection or increased contact resistance. Since there is no additional connection interface and joint between the body 44, the first overlapping portion 41 and the second overlapping portion 42, the continuous flow of current in the conductive strips 40 can be ensured, thereby improving the efficiency and stability of the electrical connection. In addition, the integrally formed structure reduces the risk of structural loosening and damage caused by external factors such as vibration and impact by eliminating the connection interface and joint, which enables the conductive strips 40 to better withstand various mechanical stresses and loads, thereby improving their mechanical strength and durability. In addition, the integrally formed structure helps to optimize the heat dissipation performance of the conductive strips 40. Since there is no connection interface and joint with high thermal resistance between the body 44, the first overlapping portion 41 and the second overlapping portion 42, the heat generated by the current can be more effectively transferred to the surrounding environment, thereby reducing the temperature of the conductive strips 40 and prolonging their service life. In addition, the integrally formed structure simplifies the manufacturing process and flow of the conductive strips 40. Compared with the traditional split structure, the integrally formed structure does not require additional connection and assembly procedures, thereby reducing manufacturing costs and production cycles.

[0057] Referring to Figures 1 to 2 In an embodiment, an insulating film 100 is further provided between the laminated positive busbar 20 and the laminated negative busbar 30.

[0058] In particular, the material of the insulation film 100 should have high insulation performance, good heat resistance and chemical corrosion resistance. Common insulation film materials include PET (polyethylene terephthalate), PI (polyimide), NOMEX (an aromatic polyamide insulation paper), etc. The insulation film 100 is placed between the laminated positive busbar 20 and the laminated negative busbar 30, ensuring that the insulation film 100 completely covers the gap between the two, and the edges should have proper overlap to prevent current leakage through the edges.

[0059] More specifically, the presence of the insulation film 100 significantly improves the insulation performance between the laminated positive busbar 20 and the laminated negative busbar 30, effectively preventing current leakage and short circuit failure, which helps to protect other components and devices in the circuit from damage and improves the safety and reliability of the entire electrical system. In addition, the insulation film material generally has good heat resistance and chemical corrosion resistance, and can maintain stable performance in high temperature, humid or corrosive environments, which helps to prolong the service life of the laminated busbar and improve its adaptability in various harsh environments.

[0060] In an embodiment, the conductive busbar 40 is made of copper or aluminum metal.

[0061] In particular, copper and aluminum are both excellent conductive materials with low resistivity and high conductivity, and the conductive busbar 40 made of copper or aluminum can ensure that the loss of current during transmission is minimized, improving the efficiency of the electrical system. In addition, copper and aluminum both have good corrosion resistance, which can resist the erosion of most corrosive media, making the conductive busbar 40 made of copper or aluminum still maintain good electrical and mechanical properties in harsh environments. In addition, copper and aluminum both have good mechanical properties such as strength, hardness and toughness, which makes the conductive busbar 40 made of copper or aluminum maintain good stability and reliability when subjected to mechanical stress and load.

[0062] The above embodiment is the preferred implementation scheme of the present application, in addition to this, the present application can also be realized in other ways, without departing from the technical scheme concept of the present application, any obvious replacement is within the protection scope of the present application.

Claims

1. An IGBT bridge mounting structure, characterized in that, The utility model relates to an IGBT module, a positive busbar, a negative busbar and a conductive row, the IGBT module is equipped with a positive pin and a negative pin, the negative busbar is located below the positive busbar and is distributed in a staggered manner, the negative busbar is connected to the negative pin, the conductive row is arranged on the left side of the positive busbar, one end of the conductive row is connected to the positive busbar, and the other end is connected to the positive pin and the positive busbar. The conductive row is provided with a first lap joint part and a second lap joint part, the first lap joint part is connected to the positive busbar, and the second lap joint part is connected to the positive pin and the positive busbar.

2. The IGBT strap bridge mounting structure according to claim 1, characterized by, The first lap joint part is provided with a first waist hole, and the second lap joint part is provided with a second waist hole; a screw is matched with the first waist hole to connect the positive busbar and the first lap joint part; a bolt is matched with the second waist hole to connect the positive pin, the positive busbar and the second lap joint part.

3. The IGBT strap-bridge mounting structure according to claim 2, characterized by, The screw is matched with a flat washer, an elastic washer and a nut to fixedly connect the positive busbar and the first lap joint part; the bolt is matched with a flat washer, an elastic washer and a nut to fixedly connect the positive pin, the positive busbar and the second lap joint part.

4. The IGBT strap bridge mounting structure according to claim 3, characterized by, An avoiding area is formed between the first lap joint part and the second lap joint part.

5. The IGBT strap-bridge mounting structure according to claim 2, characterized by The conductive row comprises a body, the first lap joint part and the second lap joint part, the first lap joint part is connected to the side of the body, and the second lap joint part is connected to the bottom of the body.

6. The IGBT strap-bridge mounting structure according to claim 2, characterized by, The first lap joint part, the second lap joint part and the body form an L shape.

7. The IGBT strap bridge mounting structure according to claim 6, characterized by, The body, the first lap joint part and the second lap joint part are integrally formed.

8. The IGBT strap-bridge mounting structure according to claim 6, characterized by, An insulating film is arranged between the positive busbar and the negative busbar.

9. The IGBT strap-bridge mounting structure according to claim 1, characterized by, The conductive row is made of copper or aluminum metal.

10. The IGBT strap-bridge mounting structure according to claim 1, characterized by, ​

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