Electrical isolation structure of IGBT module

Abstract

The utility model discloses an electrical isolation structure of an IGBT module, which comprises an IGBT electrical piece and an isolation piece, and is characterized in that the IGBT electrical piece comprises a body and two connecting parts which are arranged at intervals along a second direction; an outward abutting face and an inward clamping face are arranged at the end, close to the connecting part, of the body. The two connecting parts are provided with blocking walls opposite to each other and inserting grooves with openings opposite to each other so that a sliding way extending in the first direction can be formed between the two connecting parts. The isolation piece is provided with an inserting part suitable for being inserted into the two inserting grooves, a partition plate suitable for being inserted between the two blocking walls and a clamping hook suitable for being clamped with the clamping face in the first direction, and the isolation piece is suitable for sliding relative to the sliding way till the clamping hook is clamped with the clamping face in the first direction and the partition plate abuts against the abutting face; therefore, electrical isolation is formed between the positive terminal and the negative terminal. Electrical isolation can be formed between the positive terminal and the negative terminal, and the separator is simple in structure and convenient to install.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to an electrical isolation structure of an IGBT module. Background Art

[0002] IGBT electrical components are commonly used power devices in frequency conversion equipment. There are certain requirements for the electrical clearance and creepage distance between the positive and negative terminals. If the electrical clearance or creepage distance between them is too close or the voltage is abnormal, discharge will occur between the positive and negative terminals and damage the equipment. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and to provide an electrical isolation structure of an IGBT module, which can realize electrical isolation between the positive terminal and the negative terminal of the IGBT electrical component and has a simple structure and is easy to install.

[0004] In order to achieve the above objectives, the present invention and its related embodiments adopt the following technical solutions but are not limited to the following solutions:

[0005] The first technical scheme and its related embodiments relate to an electrical isolation structure of an IGBT electrical component module, which includes an IGBT electrical component, which includes a main body extending in a first direction and two connecting parts protruding from at least one end of the main body and arranged at intervals in a second direction perpendicular to the first direction; an end of the main body close to the connecting part is provided with an outward abutting surface and an inward clamping surface; the two connecting parts are provided with retaining walls opposite to each other and slots with openings opposite to each other so that a slide extending in the first direction is formed between the two connecting parts; the two connecting parts are respectively provided with a positive terminal and a negative terminal; and an isolating member, which is provided with a plug-in portion suitable for being inserted into two slots, a partition suitable for being inserted between two retaining walls, and a hook suitable for clamping with the clamping surface in the first direction, and the isolating member is suitable for sliding relative to the slide until the hook is clamped with the clamping surface in the first direction and the partition abuts against the abutting surface, so as to form electrical isolation between the positive terminal and the negative terminal.

[0006] The second technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein the abutment surface includes a first guide surface inclined relative to the first direction and the third direction, and the third direction is perpendicular to the first direction and the second direction; the hook is provided with a second guide surface adapted to the first guide surface, and the partition is provided with a third guide surface adapted to the first guide surface; the second guide surface is suitable for crossing the first guide surface when the isolation member slides until the third guide surface abuts against the first guide surface.

[0007] The third technical solution is based on the second technical solution and is a preferred embodiment of the second technical solution, wherein the abutting surface further includes a first abutting surface perpendicular to the first direction; and the partition is further provided with a second abutting surface matched with the first abutting surface.

[0008] The fourth technical solution is based on any one of the first to third technical solutions and is a preferred embodiment of any one of the first to third technical solutions, wherein the main body is also provided with a limiting groove opening outward and connected to the slideway, the two ends of the limiting groove are respectively connected to two slots, and the plug-in portion is also suitable for being inserted into the limiting groove.

[0009] The fifth technical solution is based on the fourth technical solution and is a preferred embodiment of the fourth technical solution, wherein the hook, the third guide surface, the second pressing surface and the plug-in portion are arranged in sequence along the third direction.

[0010] The sixth technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein the plug-in portion and the hook are both connected to the partition as a whole; the hook includes a connecting wall extending along a first direction and connected to the partition and a hook head connected to the free end of the connecting wall; a deformation gap suitable for deformation of the hook is formed between the side of the partition close to the main body and the connecting wall.

[0011] The seventh technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein it also includes an absorption capacitor, which includes a capacitor body and two connection rows respectively suitable for connecting to the positive terminal and the negative terminal, and the connection rows are configured to be suitable for making the capacitor body and the IGBT electrical component spaced apart along a third direction perpendicular to the first direction and the second direction and at least partially opposite to the IGBT electrical component; the partition forms a cutting line on one side close to the capacitor body suitable for avoiding the notch of the capacitor body.

[0012] The eighth technical solution is based on the seventh technical solution and is a preferred embodiment of the seventh technical solution, wherein the cutting line includes a first cutting line extending along a third direction and at least two second cutting lines arranged at intervals along the third direction, extending along the first direction and intersecting with the first cutting line.

[0013] The ninth technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein reinforcing ribs are symmetrically provided on both sides of the partition.

[0014] The tenth technical solution is based on the ninth technical solution and is a preferred embodiment of the ninth technical solution, wherein each side of the partition is provided with at least two reinforcing ribs arranged along the first direction and extending along the third direction.

[0015] From the above description of the utility model and its specific embodiments, it can be seen that, compared with the prior art, the technical solution of the utility model and its related embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] In the first technical scheme and related embodiments, during installation, after the IGBT electrical component is installed, the plug-in portion of the isolation component can be inserted into the two slots, the partition can be inserted between the two retaining walls, and the isolation component can be pushed along the first direction until the hook and the engaging surface are engaged along the first direction and the partition abuts the abutting surface. In this way, the isolation component and the IGBT electrical component are limited in the first direction, and the isolation component is limited in the second direction and in a third direction perpendicular to the first and second directions through the two slots and the IGBT electrical component. The isolation component is also limited in the second direction through the slideway and the IGBT electrical component, thereby realizing relative fixation of the isolation component and the IGBT electrical component, and allowing the isolation component to form electrical isolation between the positive terminal and the negative terminal. In actual applications, most IGBT electrical components will be provided with the engaging surface and abutting surface of the technical scheme, and the structural design of the connecting portion is also relatively simple. Therefore, the technical scheme can utilize the isolation component corresponding to the structural design of the IGBT electrical component itself to realize electrical isolation between the positive terminal and the negative terminal, with a simple structure and convenient installation.

[0017] In the second technical solution and related embodiments, the first guide surface is inclined relative to the first direction and the third direction, and the second guide surface is suitable for crossing the first guide surface when the isolating member slides until the third guide surface abuts against the first guide surface. Therefore, on the one hand, the first guide surface makes the hook have little resistance when the isolating member slides, and on the other hand, it can also form at least a part of the abutment surface to limit the partition.

[0018] In the third technical solution and related embodiments, the cooperation of the first pressing surface and the second pressing surface makes the limiting connection between the isolating component and the IGBT electrical component in the first direction more stable on the one hand, and provides an indication function of being plugged in place for the isolating component on the other hand.

[0019] In the fourth technical solution and related embodiments, the cooperation between the limiting groove and the plug-in portion makes the limiting connection between the isolating component and the IGBT electrical component in the first direction more stable on the one hand, and can provide the isolating component with an indication function of being plugged in place on the other hand.

[0020] In the fifth technical solution and related embodiments, the hook, the third guide surface, the second pressing surface and the limiting portion are arranged in sequence along the third direction. On the one hand, it is beneficial to the processing of the isolation piece, and on the other hand, it makes it less likely for the isolation piece to interfere with the IGBT electrical parts when sliding, making it smoother.

[0021] In the sixth technical scheme and related embodiments, the plug-in portion and the hook are integrally connected to the partition, which is beneficial to the production and processing of the isolation piece; a deformation gap suitable for the deformation of the hook is formed between the side of the partition close to the main body and the connecting wall, which is beneficial to the deformation of the hook when it is engaged with the engaging surface, thereby further reducing the resistance during the installation of the isolation piece.

[0022] In the seventh technical solution and related embodiments, the isolation piece can also form electrical isolation between the two pins of the absorption capacitor; a cutting line suitable for avoiding the gap of the capacitor body is formed on the side of the partition close to the absorption capacitor. Therefore, when the distance between the capacitor body and the IGBT electrical component in the third direction is large, the partition may not be cut. When the distance between the capacitor body and the IGBT electrical component in the third direction is small, the partition can be cut along the cutting line to form a gap to avoid the capacitor body. In this case, the partition can be inserted between the capacitor body and the IGBT electrical component to increase the safety distance. Therefore, the isolation piece of the present technical solution can be applicable to IGBT electrical components and absorption capacitors with various spacings, has strong versatility and lower cost.

[0023] In the eighth technical solution and related embodiments, the cutting lines include a first cutting line extending along a third direction and at least two second cutting lines arranged along the third direction and extending along the first direction and intersecting with the first cutting lines. Therefore, in actual applications, according to the cutting of the first cutting line and different second cutting lines, the partition can be suitable for IGBT electrical components and capacitor bodies with different spacings, with strong versatility and lower cost.

[0024] In the ninth technical solution and related embodiments, reinforcing ribs are symmetrically provided on both sides of the partition, which increases the structural strength of the partition and makes the electrical isolation more stable.

[0025] In the tenth technical solution and related implementations, each side of the partition is provided with at least two reinforcing ribs arranged along the first direction and extending along the third direction, which further increases the structural strength of the partition and makes the electrical isolation more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of an embodiment of the utility model;

[0028] Figure 2 for Figure 1 A top view of

[0029] Figure 3 for Figure 2 Section view in AA direction;

[0030] Figure 4 It is a three-dimensional exploded view of an embodiment of the utility model;

[0031] Figure 5 It is a schematic diagram of an isolation element according to an embodiment of the utility model.

[0032] Description of main reference numerals:

[0033] Radiator 10; IGBT electrical component 20; body 21; snap-fit ​​surface 211; first guide surface 212; first pressing surface 213; limiting groove 214; connecting portion 22; retaining wall 221; slot 222; slideway 01; absorption capacitor 30; capacitor body 31; connecting row 32; isolating member 40; plug-in portion 41; partition 42; third guide surface 421; second pressing surface 422; reinforcing rib 423; first cutting line 424; second cutting line 425; hook 43; connecting wall 431; hook head 432; second guide surface 433. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0035] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0036] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0037] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0038] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0039] See also Figure 1-5 , Figure 1-5 An electrical isolation structure of an IGBT module is shown, including a heat sink 10 , an IGBT electrical component 20 , an absorption capacitor 30 and an isolation component 40 .

[0040] The IGBT electrical component 20 is mounted on a substrate of the heat sink 10 , and the substrate is parallel to the first direction and the second direction and perpendicular to the third direction, that is, the first direction, the second direction and the third direction are orthogonal to each other. Figure 1-2 The first direction is the front-to-back direction, the second direction is the left-to-right direction, and the third direction is the up-down direction. The IGBT electrical component 20 includes a body 21 extending along the first direction and two connecting portions 22 protruding from at least one end of the body 21 and arranged at intervals along the second direction. Figure 1-2 In the embodiment, two connecting parts 22 are provided at both ends of the body 21 along the first direction; an end of the body 21 close to the connecting part 22 is provided with an outward abutting surface and an inward snap-fit ​​surface 211, where the inside and outside are relative to the body 21, the outward refers to the outside of the body 21, and the inward refers to the inside of the body 21; the two connecting parts 22 are provided with retaining walls 221 opposite to each other and slots 222 with openings opposite to each other so that a slideway 01 extending along the first direction is formed between the two connecting parts 22; the upper ends of the two connecting parts 22 are provided with a positive terminal and a negative terminal respectively. The retaining wall 221 extends from the open end of the slot 222 along the third direction and is perpendicular to the second direction. In practical applications, all parts of the connecting part 22 except the positive terminal and the negative terminal are insulated.

[0041] See also Figure 3 The abutting surface includes a first guide surface 212 inclined relative to the first direction and the third direction and a first pressing surface 213 perpendicular to the first direction. The lower end of the third guide surface 421 is connected to the upper end of the first pressing surface 213. The main body 21 is also provided with a limiting groove 214 opening outward and connected to the slide 01. The two ends of the limiting groove 214 are connected to the two slots 222.

[0042] The absorption capacitor 30 can absorb the voltage fluctuation of the IGBT electrical component to make the IGBT electrical component run more stably. Figure 1and Figure 3 The absorption capacitor 30 includes a capacitor body 31 and two connection rows 32 respectively adapted to be connected to the positive terminal and the negative terminal. The connection row 32 is configured to be adapted to allow the capacitor body 31 to be spaced apart from the IGBT electrical component 20 along the third direction and at least partially opposite to the IGBT electrical component 20. Figure 4 In the embodiment, the connection row 32 is L-shaped. Specifically, the connection row 32 includes a first section extending along a first direction and a second section extending along a third direction connected to each other, the first section is suitable for connecting to a positive terminal or a negative terminal; the second section is closer to the body 21 than the first section, that is, the second section is located at the rear side of the first section.

[0043] See also Figure 1 and Figure 3 The isolating member 40 is provided with an inserting portion 41 suitable for being inserted into the two slots 222, a partition 42 suitable for being inserted between the two retaining walls 221, and a hook 43 suitable for being engaged with the engaging surface 211 along a first direction. The isolating member 40 is suitable for sliding relative to the slideway 01 until the hook 43 is engaged with the engaging surface 211 along the first direction and the partition 42 abuts against the abutting surface, so that electrical isolation is formed between the positive terminal and the negative terminal. Specifically, see Figure 4-5 The plug-in portion 41 and the hook 43 are connected to the partition 42 as a whole. The partition 42 is perpendicular to the second direction and extends along the first direction. In addition to the part located in the slide 01, the partition 42 should also extend out of the slide 01 to increase the safety distance. The plug-in portion 41 is located at the bottom end of the partition 42 and cooperates with the partition 42 to form a T-shaped structure. The plug-in portion 41 extends along the first direction and is perpendicular to the third direction. The hook 43 is located at the rear end of the middle part of the partition 42. The hook 43 includes a connecting wall 431 extending along the first direction and connected to the partition 42 and a hook head 432 connected to the free end of the connecting wall 431; the side of the partition 42 close to the body 21 also forms a deformation gap suitable for the deformation of the hook 43 between the connecting wall 431. Figure 5 In the embodiment, a notch is formed at a corner of the partition plate 42 close to the connecting portion 22 .

[0044] Still see Figure 5 The hook head 432 of the hook 43 is provided with a second guide surface 433 matched with the first guide surface 212, and the partition 42 is provided with a third guide surface 421 matched with the first guide surface 212 below the hook 43; the second guide surface 433 is suitable for passing over the first guide surface 212 when the isolation member 40 slides until the third guide surface 421 abuts against the first guide surface 212. The partition 42 is also provided with a second pressing surface 422 matched with the first pressing surface 213, and the second pressing surface 422 is located below the third guide surface 421 and connected with the third guide surface 421. The plug-in portion 41 is also suitable for inserting into the limiting groove 214. The hook 43, the third guide surface 421, the second pressing surface 422 and the plug-in portion 41 are arranged in sequence along the third direction.

[0045] In order to increase the strength of the partition 42, in this embodiment, see Figure 5 , reinforcing ribs 423 are further provided on both sides of the partition 42. In this embodiment, at least two reinforcing ribs 423 arranged along the first direction and extending along the third direction are provided on each side of the partition 42. In this embodiment, the reinforcing ribs on both sides of the partition 42 are symmetrically arranged.

[0046] In practical applications, there are different spacings between the capacitor body 31 and the IGBT electrical component 20. When the spacing is small, the partition 42 may interfere with the capacitor body 31 of the absorption capacitor 30. Therefore, in this embodiment, a cutting line suitable for avoiding the gap of the absorption capacitor 30 is formed on the side of the partition 42 close to the absorption capacitor 30. The cutting line includes a first cutting line 424 extending along the third direction and at least two second cutting lines 425 arranged at intervals along the third direction, extending along the first direction and intersecting the first cutting line 424. Figure 5 In the embodiment, the cutting lines are all located behind the partition 42 and above the hook 43.

[0047] When assembling this embodiment, after the IGBT electrical component 20 and the absorption capacitor 30 are installed, the plug-in portion 41 of the isolation component 40 can be inserted into the two slots 222, the partition 42 is inserted between the two retaining walls 221, and the isolation component 40 is pushed along the first direction until the hook 43 is engaged with the engaging surface 211 along the first direction and the partition 42 abuts against the abutting surface. At this time, the plug-in portion 41 is also inserted into the limiting groove 214. In this way, the isolation component 40 and the IGBT electrical component 20 are limited along the first direction, and the isolation component 40 is connected to the IGBT electrical component 20 along the second direction and the third direction through the two slots 222. Limiting, the isolating member 40 is also limited along the second direction by the slide 01 and the IGBT electrical component 20, thereby realizing the relative fixation of the isolating member 40 and the IGBT electrical component 20, and making the isolating member form electrical isolation between the positive terminal and the negative terminal; in actual applications, most of the IGBT electrical components 20 will be provided with the above-mentioned snap-fit ​​surface and abutment surface, and the structural design of the connecting part 22 is also relatively simple. Therefore, in this embodiment, the isolating member 40 corresponding to the structural design of the IGBT electrical component 20 itself can be used to realize the electrical isolation of the positive terminal and the negative terminal, which has a simple structure and is easy to install.

[0048] In this embodiment, the cooperation of the first guide surface 212, the second guide surface 433 and the third guide surface 421, on the one hand, reduces the resistance of the hook 43 during the sliding of the isolating member 40, and on the other hand, can also form at least a part of the abutting surface to limit the partition 42. The cooperation of the first pressing surface 213 and the second pressing surface 422, on the one hand, makes the limiting connection between the isolating member 40 and the IGBT electrical component 20 in the first direction more stable, and on the other hand, can provide the isolating member 40 with an indication function of being plugged in place. The cooperation of the limiting groove 214 and the plug-in portion 41, on the one hand, makes the limiting connection between the isolating member 40 and the IGBT electrical component 20 in the first direction more stable, and on the other hand, can provide the isolating member 40 with an indication function of being plugged in place.

[0049] In this embodiment, the hook 43, the third guide surface 421, the second pressing surface 422 and the limiting portion are arranged in sequence along the third direction, which is beneficial to the processing of the isolation member 40 on the one hand, and the hook 42 is not easy to interfere with the IGBT electrical component 20 when the isolation member 40 slides on the other hand, which is smoother. The plug-in portion 41 and the hook 43 are both connected to the partition 42 as a whole, which is beneficial to the production and processing of the isolation member 40; the side of the partition 42 close to the body 21 also forms a deformation gap suitable for the deformation of the hook 43 between the connecting portion 22 of the hook 43, which is beneficial to the deformation of the hook 43 when it is engaged with the engaging surface 211, thereby further reducing the resistance during the installation of the isolation member 40.

[0050] In the present embodiment, the isolating member 40 can also form electrical isolation between the two connecting rows 32 of the absorption capacitor 30; a cutting line suitable for forming a gap to avoid the absorption capacitor 30 is provided on the side of the partition 42 close to the absorption capacitor 30. Therefore, when the distance between the capacitor body 31 and the IGBT electrical component 20 in the third direction is large, the partition 42 may not be cut; when the distance between the capacitor body 31 and the IGBT electrical component 20 in the third direction is small, the partition 42 can be cut along the cutting line so that the partition 42 forms a gap to avoid the capacitor body 31. In this case, the partition 42 can be inserted between the capacitor body 31 and the IGBT electrical component 20, thereby increasing the safety distance. The isolating member 40 of the present embodiment can be applicable to IGBT electrical components 20 and absorption capacitors 30 with various spacings, has strong versatility and lower cost. The cutting lines include a first cutting line 424 extending along a third direction and at least two second cutting lines 425 arranged at intervals along the third direction, extending along the first direction and intersecting with the first cutting line 424. Therefore, in actual applications, according to the cutting of the first cutting line 424 and different second cutting lines 425, the partition 42 can be adapted to IGBT electrical components 20 and capacitor bodies 31 with different spacings, with strong versatility and lower cost.

[0051] In this embodiment, reinforcing ribs 423 are further provided on both sides of the partition 42, which increase the structural strength of the partition 42 and make the electrical isolation more stable; each side of the partition 42 is provided with at least two reinforcing ribs 423 arranged along the first direction and extending along the third direction, which further increase the structural strength of the partition 42 and make the electrical isolation more stable.

[0052] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. An electrical isolation structure of an IGBT module, characterized in that: include An IGBT electrical component (20) comprises a body (21) extending in a first direction and two connecting parts (22) protruding from at least one end of the body (21) and arranged at intervals in a second direction perpendicular to the first direction; an end of the body (21) close to the connecting part (22) is provided with an outwardly facing abutting surface and an inwardly facing clamping surface (211); the two connecting parts (22) are provided with mutually opposing retaining walls (221) and mutually opposing slots (222) so that a slideway (01) extending in the first direction is formed between the two connecting parts (22); the two connecting parts (22) are respectively provided with a positive terminal and a negative terminal; and An isolating member (40) is provided with an inserting portion (41) suitable for being inserted into two slots (222), a partition (42) suitable for being inserted between two retaining walls (221), and a hook (43) suitable for being engaged with a engaging surface (211) along a first direction. The isolating member (40) is suitable for sliding relative to the slideway (01) until the hook (43) is engaged with the engaging surface (211) along the first direction and the partition (42) abuts against the abutting surface, so that electrical isolation is formed between the positive terminal and the negative terminal.

2. The electrical isolation structure of an IGBT module according to claim 1, characterized in that: The abutting surface comprises a first guide surface (212) which is inclined relative to a first direction and a third direction, and the third direction is perpendicular to the first direction and the second direction; the hook (43) is provided with a second guide surface (433) which is matched with the first guide surface (212), and the partition (42) is provided with a third guide surface (421) which is matched with the first guide surface (212); the second guide surface (433) is suitable for passing over the first guide surface (212) when the isolation member (40) slides until the third guide surface (421) abuts against the first guide surface (212).

3. The electrical isolation structure of an IGBT module as claimed in claim 2, characterized in that: The abutting surface further comprises a first abutting surface (213) perpendicular to the first direction; the partition plate (42) is further provided with a second abutting surface (422) matched with the first abutting surface (213).

4. An electrical isolation structure of an IGBT module according to any one of claims 1 to 3, characterized in that: The body (21) is also provided with a limiting groove (214) opening outward and connected to the slideway (01), the two ends of the limiting groove (214) are respectively connected to two slots (222), and the plug-in portion (41) is also suitable for being inserted into the limiting groove (214).

5. The electrical isolation structure of an IGBT module as claimed in claim 4, characterized in that: The hook (43), the third guide surface (421), the second pressing surface (422) and the plug-in portion (41) are arranged in sequence along the third direction.

6. The electrical isolation structure of an IGBT module according to claim 1, characterized in that: The plug-in portion (41) and the hook (43) are both connected to the partition (42) as a whole; the hook (43) comprises a connecting wall (431) extending along a first direction and connected to the partition (42) and a hook head (432) connected to a free end of the connecting wall (431); a deformation gap suitable for deformation of the hook (43) is formed between the side of the partition (42) close to the body (21) and the connecting wall (431).

7. The electrical isolation structure of an IGBT module according to claim 1, characterized in that: It also includes an absorption capacitor (30), which includes a capacitor body (31) and two connection rows (32) respectively suitable for connecting to a positive terminal and a negative terminal, wherein the connection rows (32) are configured to be suitable for allowing the capacitor body (31) and the IGBT electrical component (20) to be arranged at intervals along a third direction perpendicular to the first direction and the second direction and at least partially opposite to the IGBT electrical component (20); and a cutting line suitable for avoiding a notch in the capacitor body (31) is formed on one side of the partition (42) close to the capacitor body (31).

8. The electrical isolation structure of an IGBT module as claimed in claim 7, characterized in that: The cutting lines include a first cutting line (424) extending along a third direction and at least two second cutting lines (425) arranged at intervals along the third direction, extending along the first direction and intersecting the first cutting line (424).

9. The electrical isolation structure of an IGBT module according to claim 1, characterized in that: Reinforcing ribs (423) are symmetrically provided on both sides of the partition (42).

10. The electrical isolation structure of an IGBT module as claimed in claim 9, characterized in that: Each side of the partition plate (42) is provided with at least two reinforcing ribs (423) arranged along the first direction and extending along the third direction.

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