Insulation protection components and IGBT modules

Abstract

This application relates to an insulating protective component and an IGBT module. The insulating protective component includes a protective part and a mounting part. The protective part is made of insulating material and includes a baffle and a partition assembly. The partition assembly includes three partition plates arranged at intervals, each partition plate connected to the baffle and arranged at an angle. The partition assembly and the baffle together enclose a first placement cavity and a second placement cavity arranged at intervals. The end face of the protective part opposite to the baffle has a first placement opening communicating with the first placement cavity and a second placement opening communicating with the second placement cavity. The mounting part is connected to the protective part and includes a connecting end protruding from the protective part. The connecting end is located on the side of the protective part with the first and second placement openings, and the edge of the connecting end away from the protective part has a recessed connecting groove. The above solution, through physical isolation, not only prevents electrical safety problems but is also low-cost and easy to manufacture.

Description

Technical Field

[0001] This application relates to the field of electrical safety technology, and in particular to insulating protective components and IGBT modules. Background Technology

[0002] With the rapid development of new energy power generation, high-voltage direct current transmission, and high-power industrial converters, centralized high-power IGBT (Insulated-Gate Bipolar Transistor) modules have become the core power unit of power electronic equipment. Under the industry trend of continuously increasing system power density, the compact layout design of multilayer busbars, IGBT units, and absorption capacitors has become a key technical path to achieve high power density and low stray inductance.

[0003] However, in actual installation, assembly errors are unavoidable, leading to the gradual accumulation of positional and dimensional deviations between the positive and negative terminals of the absorption capacitor, the positive and negative terminals of the IGBT module, and the DC stack. This cumulative error directly causes a reduction in electrical clearance, preventing it from meeting the safety standards specified in the theoretical design, thus triggering a serious electrical fault: DC arcing. Once DC arcing occurs, it not only causes irreversible damage to critical components such as the IGBT module, absorption capacitor, and DC stack, significantly shortening the equipment's lifespan, but also poses a serious threat to the stable operation of the entire power system, and may even cause major safety accidents such as fires, resulting in huge economic losses and social impact. Utility Model Content

[0004] Therefore, it is necessary to provide an insulating protective component and an IGBT module to address the electrical risks caused by insufficient electrical clearance due to assembly errors during the assembly of the power unit of a high-power converter, which leads to DC arcing.

[0005] An insulating protective component includes a protective part and a mounting part. The protective part is made of insulating material and includes a baffle and a partition assembly. The partition assembly includes three partition plates arranged at intervals in sequence. Each partition plate is connected to the baffle and is arranged at an angle. The partition assembly and the baffle together enclose a first placement cavity and a second placement cavity arranged at intervals. The end face of the protective part opposite to the baffle has a first placement opening communicating with the first placement cavity and a second placement opening communicating with the second placement cavity. The mounting part is connected to the protective part and includes a connecting end protruding from the protective part. The connecting end is located on the side of the protective part where the first placement opening and the second placement opening are provided. The edge of the connecting end away from the protective part has a recessed connecting groove.

[0006] In one embodiment, each of the partitions includes a first partition and a second partition, the first partition defining the first placement cavity and / or the second placement cavity, and the second partition protruding from the side of the partition away from the first placement cavity.

[0007] In one embodiment, the partition assembly has a middle partition located in the middle. The middle partition has a recessed clearance groove on its edge away from the baffle in the height direction. The clearance groove extends from the side of the baffle away from the first placement cavity toward the side of the baffle toward the first placement cavity, and the clearance groove penetrates the middle partition in the thickness direction.

[0008] In one embodiment, the protective part further includes a back plate, which is sequentially connected to three of the partition plates and is located on the opposite side of the baffle. The first placement port and the second placement port are both located on the side of the back plate near the mounting part. One end of the back plate is located between the connecting end and the second placement cavity to separate the connecting end and the second placement cavity, and the other end is located between the connecting end and the first placement cavity to separate the connecting end and the first placement cavity.

[0009] In one embodiment, the protective part includes a connecting plate, and the mounting part is fixedly connected to the end face of the connecting plate opposite to the first placement cavity or the second placement cavity. One of the mounting part and the connecting plate is provided with at least one limiting post, and the other of the mounting part and the connecting plate is provided with limiting holes corresponding to the limiting posts.

[0010] In one embodiment, the mounting part is made of metal.

[0011] In one embodiment, the connecting plate and the baffle are arranged at an angle, and in a direction perpendicular to the connecting plate, the baffle protrudes from the side of the connecting plate away from the first placement cavity.

[0012] An IGBT module includes an insulating protective component as described in any of the above embodiments, and further includes a plurality of IGBT bodies. Each IGBT body includes a terminal group, the terminal group including a positive terminal and a negative terminal spaced apart. The positive terminal enters the first placement cavity through a first placement port, and the negative terminal enters the second placement cavity through a second placement port. The IGBT body includes fixing holes located on both sides of the terminal group, and the connecting slot is located in the fixing holes.

[0013] In one embodiment, the IGBT module further includes an absorption capacitor, which includes a positive terminal and a negative terminal spaced apart. The positive terminal and the negative terminal are located in the first placement cavity and the second placement cavity, respectively, and enter the first placement cavity and the second placement cavity from an opening on the side of the first placement cavity and the second placement cavity away from the baffle, respectively.

[0014] In one embodiment, the IGBT module further includes a DC stack, which includes a plurality of spaced busbar claws. The plurality of busbar claws are respectively located in the first placement cavity and the second placement cavity of the plurality of insulating protective components, and the portion of the DC stack other than the busbar claws is located on the side of the baffle away from the first placement cavity and the second placement cavity.

[0015] The insulating protective component provided in the above solution achieves a physical isolation effect by setting up a first placement cavity and a second placement cavity that are spaced apart. The positive and negative terminals are installed after entering the first and second placement cavities respectively. Even if there are assembly errors during the assembly of the stacked busbar, IGBT unit, and absorption capacitor, DC arcing discharge can be prevented under the effect of physical isolation. Furthermore, the insulating protective component also includes an insulating protective part and a mounting part connected to the protective part. The IGBT body is connected through a connecting groove in the mounting part. Since the mounting part does not participate in the isolation of the IGBT body, absorption capacitor, and DC stacked busbar, the material of the mounting part is not limited to insulating materials; higher-strength materials, such as metals, can be used, thereby improving the installation strength of the insulating protective component. This not only prevents electrical safety problems but also reduces cost and facilitates production.

[0016] The IGBT module provided in the above solution has a connecting groove for the insulating protective component located at the fixing hole of the IGBT body, so that the mounting part can use the fixing hole existing in the IGBT body itself to connect and fix it, thereby facilitating the installation of the insulating protective component and avoiding interference with the IGBT body during the installation of the insulating protective component. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an IGBT module in one embodiment of this application.

[0018] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the IGBT module.

[0019] Figure 3 for Figure 2 Installation diagram of the insulation protection components and IGBT body.

[0020] Figure 4 for Figure 1 A schematic diagram of the installation cross-section of the IGBT module.

[0021] Figure 5 for Figure 3 A schematic diagram of the structure of the insulating protective component.

[0022] Figure 6 for Figure 5 An exploded view of the insulating protective component.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10. IGBT module; 100. Insulating protective component; 110. Protective part; 111. First placement cavity; 112. Second placement cavity; 113. Baffle; 114. Partition assembly; 1141. First partition; 1142. Middle partition; 11421. Clearance groove; 1143. Second partition; 1144. First partition; 1145. Second partition; 115. Back plate; 1151. Reinforcing part; 1152. First partition; 1153. Second partition; 116. Connecting plate; 1161. Limiting post ; 117. First placement port; 118. Second placement port; 120. Mounting part; 121. Connecting end; 122. Connecting groove; 123. Limiting hole; 200. IGBT body; 210. Positive terminal of body; 220. Negative terminal of body; 230. Fixing hole; 240. Fastener; 300. Absorption capacitor; 310. Positive terminal of capacitor; 320. Negative terminal of capacitor; 400. DC stack; 410. Busbar claw; 420. Insulating film; 500. Heat sink; 600. Busbar; 700. Connector. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0031] See Figure 1 , Figure 1 This illustration shows a structural schematic diagram of an IGBT module 10 according to an embodiment of this application. The IGBT module 10 provided in this embodiment includes an insulating protective element 100 as described in any of the following embodiments, and also includes multiple IGBT bodies 200. Figure 2 As shown, Figure 2 This diagram shows an exploded view of an IGBT module 10 according to one embodiment of the present application. Each IGBT body 200 includes a terminal group, which includes a positive terminal 210 and a negative terminal 220 spaced apart from each other. Figure 3 As shown, the positive terminal 210 and the negative terminal 220 of the main body are respectively located in the first placement cavity 111 and the second placement cavity 112, which are spaced apart within the insulating protective component 100, so as to achieve the effect of physical isolation. Even if there is an assembly error during the assembly process, DC arcing discharge can be avoided under the action of physical isolation.

[0032] like Figure 1 As shown, the IGBT module 10 also includes a heat sink 500 for transferring and dissipating heat during the IGBT's operation. The IGBT body 200 includes fixing holes 230 located on both sides of the terminal group. The IGBT body 200 is fixedly connected to the heat sink 500 after passing through the fixing holes 230 with fasteners 240.

[0033] like Figure 1 As shown, in this embodiment, the IGBT module 10 includes multiple heat sinks 500, each heat sink 500 can be connected to multiple IGBT bodies 200, and different IGBTs connected to adjacent heat sinks 500 can be connected by power through a bus 600.

[0034] like Figure 1 and Figure 2As shown, in one embodiment, the IGBT module 10 further includes an absorption capacitor 300. The absorption capacitor 300 includes a positive terminal 310 and a negative terminal 320 spaced apart. The positive terminal 310 and the negative terminal 320 are respectively located in the first placement cavity 111 and the second placement cavity 112, so that the separation of the first placement cavity 111 and the second placement cavity 112 achieves a physical isolation effect. Even if there are assembly errors during the assembly process, DC arcing discharge can be avoided under the action of physical isolation, increasing the electrical clearance between components of different polarities, thereby improving the electrical safety and reliability of the product. Furthermore, as... Figure 2 As shown, the positive terminal 310 and the negative terminal 320 of the capacitor enter the first placement cavity 111 and the second placement cavity 112 respectively through openings on the side of the first placement cavity 111 away from the baffle 113. In this embodiment, the first placement cavity 111 and the second placement cavity 112 have top openings, and the positive terminal 310 and the negative terminal 320 of the capacitor enter the first placement cavity 111 and the second placement cavity 112 respectively through the top openings of the first placement cavity 111 and the second placement cavity 112.

[0035] like Figure 1 and Figure 2 As shown, in one embodiment, the IGBT module 10 further includes a DC stack 400, which includes a plurality of busbar pins 410, including a positive busbar pin, a negative busbar pin, and a midpoint busbar pin. The positive busbar pin, negative busbar pin, and midpoint busbar pin are respectively located in the first placement cavity 111 and the second placement cavity 112 of the plurality of insulating protective components 100. In this embodiment, the first placement cavity 111 and the second placement cavity 112 have top openings, and the positive busbar pin, negative busbar pin, and midpoint busbar pin enter the first placement cavity 111 and the second placement cavity 112 through the top openings of the first placement cavity 111 and the second placement cavity 112, respectively.

[0036] And such as Figures 1 to 3 As shown, the portion of the DC stack 400, excluding the busbar claw 410, is located on the side of the baffle 113 away from the first placement cavity 111 and the second placement cavity 112, so as to separate the DC stack 400 and the mounting portion 120 by the baffle 113.

[0037] like Figure 2 As shown, in this embodiment, the DC busbar 400 also includes an insulating film 420 sandwiched between two adjacent busbars to prevent them from short-circuiting.

[0038] like Figure 4As shown, the body terminals, capacitor terminals, and busbar claws 410 located in the same first placement cavity 111 or second placement cavity 112 can be electrically connected through the connector 700; specifically, the body positive terminal 210, capacitor positive terminal 310, and positive busbar claw or midpoint busbar claw located in the same first placement cavity 111 or second placement cavity 112 can be electrically connected through the connector 700, and correspondingly, the body negative terminal 220, capacitor negative terminal 320, and negative busbar claw or midpoint busbar claw located in the same first placement cavity 111 or second placement cavity 112 can be electrically connected through another connector 700.

[0039] Combination Figure 3 and Figure 5 As shown, Figure 4 and Figure 5 The diagram shows a schematic of the structure of an insulating protective element 100 provided in one embodiment of the present application. An insulating protective element 100 is provided in one embodiment of the present application, which can be applied to the above-mentioned IBGT module, but is not intended to limit it.

[0040] like Figures 3 to 6 As shown, the insulating protective component 100 includes a protective part 110 and a mounting part 120. The protective part 110 is made of insulating material and includes a baffle 113 and a partition assembly 114. The partition assembly 114 includes three partitions arranged at intervals in sequence. Each partition is connected to the baffle 113 and is arranged at an angle. In this embodiment, all three partitions are arranged perpendicular to the baffle 113, but this is not a limitation. In this embodiment, the three partitions are arranged parallel to each other, but this is not a limitation.

[0041] like Figures 3 to 6 As shown, the partition assembly 114 and the baffle 113 together enclose and form a first placement cavity 111 and a second placement cavity 112 that are spaced apart. For ease of explanation, the three partitions are respectively named the first partition 1141, the middle partition 1142, and the second partition 1143. Figure 4 and Figure 5 As shown, the first partition 1141, the baffle 113 and the middle partition 1142 together enclose to form the first placement cavity 111, and the middle partition 1142, the baffle 113 and the second partition 1143 together enclose to form the second placement cavity 112.

[0042] Combination Figure 2 As shown, the positive terminal 210 and the negative terminal 220 of the main body are respectively inserted into the first placement cavity 111 and the second placement cavity 112, which are spaced apart, thereby achieving the effect of physical isolation. Even if there are assembly errors during the assembly process, DC arcing discharge can be avoided under the action of physical isolation.

[0043] like Figure 3 and Figure 5As shown, the protective part 110 has a first placement port 117 connecting the first placement cavity 111 and a second placement port 118 connecting the second placement cavity 112 on the end face opposite to the baffle 113. The positive terminal 210 of the IGBT body 200 enters the first placement cavity 111 through the first placement port 117, and the negative terminal 220 enters the second placement cavity 112 through the second placement port 118. Figure 2 and Figure 4 As shown, when the positive terminal 210 and the negative terminal 220 of the main body are respectively inserted into the first placement cavity 111 and the second placement cavity 112, the partition plate 1142 is inserted into the gap between the positive terminal 210 and the negative terminal 220 of the main body, so as to block the positive terminal 210 and the negative terminal 220 of the main body through the partition plate 1142.

[0044] like Figure 2 and Figure 3 As shown, the mounting part 120 is used to connect the IGBT body 200 to ensure the stable position of the insulating protective component 100 after installation. Figure 4 and Figure 5 As shown, the mounting portion 120 is connected to the protective portion 110, and the mounting portion 120 includes a connecting end 121 protruding from the protective portion 110. The connecting end 121 protrudes from the protective portion 110, such that when the connecting end 121 is connected to the IGBT body 200, it does not interfere with the first placement cavity 111 or the second placement cavity 112. Figures 2 to 5 As shown, the mounting part 120 does not participate in the isolation of the IGBT body 200, the absorption capacitor 300 and the DC stack 400. Therefore, the material of the mounting part 120 is not limited to insulating material. Higher strength materials, such as metal materials, can be selected to improve the installation strength of the insulating protective component 100.

[0045] like Figure 3 and Figure 5 As shown, the connecting end 121 is located on the side of the protective part 110 where the first placement port 117 and the second placement port 118 are provided. The edge of the connecting end 121 away from the protective part 110 is recessed with a connecting groove 122. In this embodiment, the connecting groove 122 is located on the side of the first placement port 117 away from the second placement port 118, and / or on the side of the second placement port 118 away from the first placement port 117, so that the connecting groove 122 is aligned with the fixing hole 230, so that the mounting part 120 can be connected and fixed to it by means of the fixing hole 230 existing in the IGBT body 200, so that the installation of the insulating protective member 100 is convenient and avoids interference of the installation of the insulating protective member 100 with the IGBT body 200.

[0046] like Figure 5As shown, in one embodiment, each partition includes a first partition 1144 and a second partition 1145. The first partition 1144 defines a first placement cavity 111 and / or a second placement cavity 112, and the second partition 1145 protrudes from the side of the baffle 113 opposite to the first placement cavity 111. Specifically, the first partition 1141, the middle partition 1142, and the second partition 1143 all include a first partition 1144 and a second partition 1145, wherein the first partition 1144 of the first partition 1141 and the middle partition 1142 defines the first placement cavity 111, and the first partition 1144 of the middle partition 1142 and the second partition 1143 defines the second placement cavity 112.

[0047] like Figure 5 and Figure 6 As shown, the first partition 1144 is connected to the end face of the baffle 113 facing the first placement cavity 111 and the second placement cavity 112, and the height of the first partition 1144 is greater than the height of the baffle 113. The portion of the first partition 1144 that protrudes from the baffle 113 in the height direction extends toward the side of the baffle 113 away from the first placement cavity 111 to form the second partition 1145.

[0048] like Figure 5 and Figure 6 As shown, in one embodiment, the partition assembly 114 has a middle partition 1142 in the middle. The middle partition 1142 has a recessed clearance groove 11421 on the edge away from the baffle 113 in the height direction. The clearance groove 11421 extends from the side of the baffle 113 away from the first placement cavity 111 toward the side of the baffle 113 toward the first placement cavity 111. The clearance groove 11421 penetrates the middle partition 1142 in the thickness direction. When the absorption capacitor 300 is connected to the insulating protective member 100, the absorption capacitor 300 is located above the middle partition 1142. The clearance groove 11421 is used to avoid the installation position of the absorption capacitor 300 so as to prevent the middle partition 1142 from interfering with the installation of the absorption capacitor 300.

[0049] like Figure 5 and Figure 6 As shown, in one embodiment, the protective part 110 further includes a back plate 115, which is sequentially connected to three partition plates, such as... Figure 4 and Figure 5 As shown, the back plate 115 is sequentially connected to the first partition 1141, the middle partition 1142, and the second partition 1143. The back plate 115 is located on the opposite side of the baffle 113, and the first placement port 117 and the second placement port 118 are both located on the side of the back plate 115 near the mounting part 120.

[0050] In this embodiment, the back plate 115 has an overall concave structure, combined with Figures 4 to 6As shown, one end of the back plate 115 is located between the connecting end 121 and the second placement cavity 112 to separate the connecting end 121 and the second placement cavity 112, and the other end is located between the connecting end 121 and the first placement cavity 111 to separate the connecting end 121 and the first placement cavity 111. For ease of explanation, the back plate 115 includes a first partition portion 1152, a reinforcing portion 1151, and a second partition portion 1153 connected in sequence, wherein the first partition portion 1152 is located between the connecting end 121 and the first placement cavity 111 to separate the connecting end 121 and the first placement cavity 111, and the second partition portion 1153 is located between the connecting end 121 and the second placement cavity 112 to separate the connecting end 121 and the second placement cavity 112.

[0051] like Figure 5 and Figure 6 As shown, in one embodiment, the protective part 110 includes a connecting plate 116, and a mounting part 120 is fixedly connected to the end face of the connecting plate 116 facing away from the first placement cavity 111 or the second placement cavity 112. In this embodiment, there are two connecting plates 116, one of which defines the first placement cavity 111 and the other defines the second placement cavity 112. Correspondingly, there are also two mounting parts 120, which are connected one-to-one with the connecting plates 116, that is, one mounting part 120 is connected to the end face of the connecting plate 116 facing away from the first placement cavity 111, and the other mounting part 120 is connected to the end face of the connecting plate 116 facing away from the second placement cavity 112.

[0052] like Figure 6 As shown, one of the mounting portion 120 and the connecting plate 116 has at least one limiting post 1161 protruding from it, and the other of the mounting portion 120 and the connecting plate 116 has a limiting hole 123 corresponding to the limiting post 1161, so as to limit the two through the limiting post 1161 and the limiting hole 123. In this embodiment, the connecting plate 116 has at least one limiting post 1161 protruding from it, and the mounting portion 120 has a limiting hole 123 corresponding to the limiting post 1161. In other embodiments, the mounting portion 120 may also have at least one limiting post 1161 protruding from it, and the connecting plate 116 may have a limiting hole 123 corresponding to the limiting post 1161. It can be understood that in Figure 6 The example shown is that each mounting part 120 has 4 limiting holes 123 and the connecting plate 116 has 4 limiting posts 1161, but this is not a limitation.

[0053] In this embodiment, the mounting part 120 and the protective part 110 are securely connected by means of hot-melt inlay or bonding, but this is not a limitation. In other embodiments, other connection methods, such as bolt connection, may also be used.

[0054] In one embodiment, the mounting part 120 is made of metal, thereby improving the installation strength of the insulating protective component 100.

[0055] like Figure 5 and Figure 6 As shown, in one embodiment, the connecting plate 116 and the baffle 113 are arranged at an angle, and in a direction perpendicular to the connecting plate 116, the baffle 113 protrudes from the side of the connecting plate 116 away from the first placement cavity 111, so as to separate the mounting part 120, the fastener 240 connecting the mounting part 120 and the busbar claw 410 of the DC stack 400 located inside the first placement cavity 111 and the second placement cavity 112.

[0056] The insulating protective component 100 provided in the above solution achieves a physical isolation effect by setting a first placement cavity 111 and a second placement cavity 112 that are spaced apart, allowing the positive and negative terminals to be installed after entering the first placement cavity 111 and the second placement cavity 112 respectively. Even if there are assembly errors during the assembly of the stacked busbar, IGBT unit, and absorption capacitor 300, DC arcing discharge can be avoided under the effect of physical isolation. Furthermore, the insulating protective component 100 also provides an insulating protective part 110 and a mounting part 120 connected to the protective part 110, connecting the IGBT body 200 through the connecting groove 122 of the mounting part 120. The mounting part 120 does not participate in the isolation of the IGBT body 200, absorption capacitor 300, and DC stacked busbar 400; therefore, the material of the mounting part 120 is not limited to insulating materials, and higher-strength materials, such as metal materials, can be used to improve the installation strength of the insulating protective component 100. This not only prevents electrical safety problems but also reduces costs and facilitates production.

[0057] In the above solution, the IGBT module 10 has a connecting groove 122 of the insulating protective component 100 that is located in the fixing hole 230 of the IGBT body 200, so that the mounting part 120 can be connected and fixed to the IGBT body 200 by using the fixing hole 230 that exists in the IGBT body 200 itself, so that the installation of the insulating protective component 100 is convenient and avoids interference of the installation of the insulating protective component 100 with the IGBT body 200.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An insulating guard, characterized in that, The insulating protective component includes: The protective part, made of insulating material, includes a baffle and a partition assembly. The partition assembly includes three spaced-apart partitions, each connected to the baffle at an angle. The partition assembly and the baffle together form a first placement cavity and a second placement cavity spaced apart. The end face of the protective part opposite the baffle has a first placement opening communicating with the first placement cavity and a second placement opening communicating with the second placement cavity. The mounting part is connected to the protective part, and the mounting part includes a connecting end protruding from the protective part. The connecting end is located on the side of the protective part where the first placement port and the second placement port are provided, and a connecting groove is recessed on the edge of the connecting end away from the protective part.

2. The insulating guard of claim 1, wherein, Each of the partitions includes a first partition and a second partition, the first partition defining the first placement cavity and / or the second placement cavity, and the second partition protruding from the side of the partition away from the first placement cavity.

3. The insulating guard of claim 1, wherein, The partition assembly has a middle partition in the middle. The middle partition has a recessed clearance groove on the edge away from the baffle in the height direction. The clearance groove extends from the side of the baffle away from the first placement cavity toward the side of the baffle toward the first placement cavity, and the clearance groove penetrates the middle partition in the thickness direction.

4. The insulating guard of claim 1, wherein, The protective part also includes a back plate, which is connected to the three partition plates in sequence and is located on the opposite side of the baffle. The first placement port and the second placement port are both located on the side of the back plate near the mounting part. One end of the back plate is located between the connecting end and the second placement cavity to separate the connecting end and the second placement cavity, and the other end is located between the connecting end and the first placement cavity to separate the connecting end and the first placement cavity.

5. The insulating guard of claim 1, wherein, The protective part includes a connecting plate, and the mounting part is fixedly connected to the end face of the connecting plate opposite to the first placement cavity or the second placement cavity. One of the mounting part and the connecting plate is provided with at least one limiting post, and the other of the mounting part and the connecting plate is provided with limiting holes corresponding to the limiting posts.

6. The insulating guard of claim 5, wherein, The mounting part is made of metal.

7. The insulating guard of claim 6, wherein, The connecting plate and the baffle are arranged at an angle, and in a direction perpendicular to the connecting plate, the baffle protrudes from the connecting plate on the side opposite to the first placement cavity.

8. An IGBT module, characterized by, The IGBT module includes multiple insulating protective components as described in any one of claims 1 to 7, and also includes multiple IGBT bodies. Each IGBT body includes a terminal group, the terminal group including a positive terminal and a negative terminal of the body arranged at intervals. The positive terminal of the body enters the first placement cavity from the first placement port, and the negative terminal of the body enters the second placement cavity from the second placement port. The IGBT body includes fixing holes located on both sides of the terminal group, and the connecting slot is located in the fixing holes.

9. The IGBT module of claim 8, wherein, The IGBT module further comprises an absorption capacitor, the absorption capacitor comprises a capacitor positive terminal and a capacitor negative terminal arranged at intervals, the capacitor positive terminal and the capacitor negative terminal are respectively located in the first placement cavity and the second placement cavity, and the capacitor positive terminal and the capacitor negative terminal respectively enter the first placement cavity and the second placement cavity from the opening of the first placement cavity and the second placement cavity away from the side of the baffle.

10. The IGBT module of claim 8, wherein, The IGBT module further comprises a DC stack, the DC stack comprises a plurality of bus bar claws arranged at intervals, a plurality of the bus bar claws are respectively located in the first placement cavity and the second placement cavity of the plurality of insulation protection members, and the part of the DC stack other than the bus bar claws is located on the side of the baffle away from the first placement cavity and the second placement cavity.

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