Connection structure of thin-film capacitor and IGBT module of electric vehicle controller

Abstract

The utility model discloses a connection structure of a thin-film capacitor and an IGBT module of an electric vehicle controller. The connection structure comprises a control housing. The control shell is provided with a first containing cavity with an opening in the top, and a thin-film capacitor is further installed on one side in the first containing cavity. Six upper-layer output terminal assemblies are mounted at intervals in the length direction of the upper part of one side of the thin-film capacitor, and three lower-layer output terminal assemblies are mounted at intervals in the length direction of the lower part of one side of the thin-film capacitor. The upper layer output terminals of the film capacitor are connected with the three upper layer U-phase IGBT modules and the three W-phase IGBT modules, the lower layer output terminals of the film capacitor are connected with the three lower layer V-phase IGBT modules, the water cooling plate is arranged in the middle, the IGBT modules on the two sides are cooled, the plane occupied area can be reduced, meanwhile, the lower layer output terminals of the capacitor directly penetrate through the abdicating holes, and the heat dissipation efficiency is improved. The DC input end of the lower-layer V-phase IGBT is in bolted connection, so that the current path can be shortened, and the parasitic inductance can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a car controller technical field especially relates to a kind of connection structure of film capacitor and IGBT module of electric automobile controller. BACKGROUND

[0002] The existing heavy truck electric motor controller power requirement is high, and the volume of capacitor and IGBT is large. The traditional parallel layout occupies space, resulting in the controller volume being too large, the cost increasing, the vibration risk increasing, and the long bus connection leading to the increase of high-frequency switching loss, affecting the system efficiency. Therefore, it needs to be improved. INVENTION CONTENTS

[0003] The utility model aims at providing a kind of connection structure of film capacitor and IGBT module of electric automobile controller, which connects the upper layer output terminal of film capacitor with the three IGBT modules of upper layer U phase and the three IGBT modules of W phase, and the lower layer output terminal of film capacitor is connected with the three IGBT modules of lower layer V phase, and the middle is water-cooling plate, and the IGBT module of two sides is cooled, which can reduce the area of plane occupation. At the same time, the lower layer output terminal of capacitor directly passes through the accommodation hole and is bolted with the DC input end of lower layer V phase IGBT, which can shorten the current path, reduce the parasitic inductance and improve the system efficiency.

[0004] To achieve the above-mentioned purpose, the following technical scheme is adopted:

[0005] A kind of connection structure of film capacitor and IGBT module of electric automobile controller, including control casing;The control casing is provided with first cavity with opening in top, and one side in first cavity is further provided with film capacitor;Six upper layer output terminal assemblies are installed on the upper length direction of one side of film capacitor, and three lower layer output terminal assemblies are installed on the lower length direction of one side of film capacitor;Water-cooling plate is further installed on the side close to film capacitor in first cavity, and first installation slot is further provided in the bottom of control casing and below water-cooling plate and penetrates into first cavity;The bottom of water-cooling plate is partly exposed in first installation slot;Accommodation hole is further provided in the side close to film capacitor in first installation slot, and the lower part of film capacitor is in accommodation hole, and three lower layer output terminal assemblies of film capacitor are arranged by penetrating into first installation slot;Three V phase IGBT modules in parallel with each other are further installed in the bottom of water-cooling plate in first installation slot, and one end of each V phase IGBT module is connected with a lower layer output terminal assembly;Three U phase IGBT modules in parallel with each other and three W phase IGBT modules in parallel with each other are further installed on the top of water-cooling plate, and one end of three U phase IGBT modules and one end of three W phase IGBT modules are connected with an upper layer output terminal assembly.

[0006] Further, the upper layer output terminal assembly comprises an upper layer output positive terminal and an upper layer output negative terminal; and the lower layer output terminal assembly comprises a lower layer output positive terminal and a lower layer output negative terminal.

[0007] Further, one side of the first accommodating cavity is further provided with a first mounting cavity; the thin film capacitor is mounted in the first mounting cavity; and the clearance hole is provided through to the first mounting cavity.

[0008] Further, the top of the control shell is further provided with a top cover for sealing the first accommodating cavity.

[0009] Further, the top edge of the control shell is further provided with a first clamping groove in the form of a ring structure, and the first clamping groove is embedded with a sealing ring.

[0010] Further, the first mounting groove is further detachably provided with a bottom cover.

[0011] By adopting the above scheme, the present application has the following beneficial effects:

[0012] The thin film capacitor upper layer output terminal is connected with the upper layer U-phase three IGBT modules and the W-phase three IGBT modules, the thin film capacitor lower layer output terminal is connected with the lower layer V-phase three IGBT modules, and the middle is a water cooling plate, which can dissipate heat for the two IGBT modules, reduce the planar area occupation, and at the same time, the capacitor lower layer output terminal directly passes through the clearance hole and is bolted with the lower layer V-phase IGBT direct current input end, which can shorten the current path, reduce the parasitic inductance, and improve the system efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is an exploded view of the present application;

[0014] Figure 2 is a structural schematic view of the present application without a top cover;

[0015] Figure 3 is a structural schematic view of the control shell and the water cooling plate of the present application;

[0016] Figure 4 is Figure 1 is a bottom view of the present application;

[0017] Figure 5 is a structural schematic view of the control shell bottom view of the present application;

[0018] Figure 6 is a top view of the present application;

[0019] Among them, the drawing mark explanation is:

[0020] 1, control shell; 2, film capacitor; 3, water cooling plate; 4, V-phase IGBT module; 5, U-phase IGBT module; 6, W-phase IGBT module; 11, first installation slot; 12, let hole; 13, top cover; 14, first clamping groove; 15, bottom cover; 21, upper layer output positive terminal; 22, upper layer output negative terminal; 23, lower layer output positive terminal; 24, lower layer output negative terminal. DETAILED DESCRIPTION

[0021] The utility model is described in detail below in combination with the drawings and specific embodiments.

[0022] Referring to Figures 1 to 6 The utility model provides a kind of film capacitor and IGBT module's connecting structure of electric automobile controller, in an embodiment, including control shell 1;The control shell 1 is equipped with the first cavity with opening in top, and one side in the first cavity is also installed film capacitor 2;Six upper layer output terminal assemblies are installed on the length direction of one side upper portion of film capacitor 2 with interval, and three lower layer output terminal assemblies are installed on the length direction of one side lower portion of film capacitor 2 with interval;Water cooling plate 3 is also installed in the first cavity close to one side of film capacitor 2 of the control shell 1, and the bottom of control shell 1 is located below water cooling plate 3 also equipped with first installation slot 11 that is through to the first cavity;The bottom part of water cooling plate 3 is exposed in first installation slot 11;Let hole 12 is also equipped in the first installation slot 11 close to one side of film capacitor 2, and the lower portion of film capacitor 2 is located in let hole 12, and three lower layer output terminal assemblies of film capacitor 2 are arranged by being inserted into first installation slot 11;Three V-phase IGBT modules 4 that are parallel to each other are also installed in the bottom of water cooling plate 3 in the first installation slot 11, and one end of each V-phase IGBT module 4 corresponds with a lower layer output terminal assembly connection;Three U-phase IGBT modules 5 that are parallel to each other and three W-phase IGBT modules 6 that are parallel to each other are also installed on the top of water cooling plate 3, and one end of three U-phase IGBT modules 5 and one end of three W-phase IGBT modules 6 correspond with an upper layer output terminal assembly connection.

[0023] Continue to refer to Figures 1 to 6As shown, in the embodiment, the upper layer output terminal assembly comprises an upper layer output positive terminal 21 and an upper layer output negative terminal 22; the lower layer output terminal assembly comprises a lower layer output positive terminal 23 and a lower layer output negative terminal 24; meanwhile, a first mounting cavity is formed on one side of the first accommodating cavity; the film capacitor 2 is mounted in the first mounting cavity; the accommodation hole 12 is formed through the first mounting cavity; one end of the control shell 1 is further provided with a water inlet and an outlet which are in communication with the water-cooling plate 3; in the embodiment, the upper layer output terminals of the film capacitor 2 are connected with the three IGBT modules of the upper layer U phase and the three IGBT modules of the W phase, the lower layer output terminals of the film capacitor 2 are connected with the three IGBT modules of the lower layer V phase, and the water-cooling plate 3 is arranged in the middle to dissipate heat for the IGBT modules on both sides, so that the planar area occupied can be reduced; meanwhile, the lower layer output terminals of the capacitor directly pass through the accommodation hole 12 and are bolted with the lower layer V phase IGBT direct current input terminals, so that the current path can be shortened, the parasitic inductance can be reduced, and the system efficiency can be improved.

[0024] In an embodiment, the top of the control shell 1 is further provided with a top cover 13 for sealing the first accommodating cavity; the top edge of the control shell 1 is further provided with a first clamping groove 14 in the form of an annular structure, and a sealing ring is embedded in the first clamping groove 14; the sealing ring can improve the waterproof performance; meanwhile, the opening of the first mounting groove 11 is detachably provided with a bottom cover 15, so that the lower layer V phase three IGBT modules can be conveniently disassembled and assembled.

[0025] The above is only a preferred embodiment of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A connection structure of a film capacitor of an electric vehicle controller and an IGBT module, characterized by, The utility model provides a control casing, the first cavity is opened to the top of control casing and has the opening, and one side in the first cavity is further provided with a film capacitor, six upper layer output terminal assemblies are installed on the upper part of one side of film capacitor in length direction, three lower layer output terminal assemblies are installed on the lower part of one side of film capacitor in length direction, the water cooling plate is further installed on the side of film capacitor in the first cavity, and the bottom of control casing is further provided with the first installation groove that is through to the first cavity, the bottom of water cooling plate is partly exposed in the first installation groove, the lower part of film capacitor is in the let -place hole, and the three lower layer output terminal assemblies of film capacitor are arranged into the first installation groove, the bottom of water cooling plate is further provided with three V-phase IGBT modules that are parallel to each other in the first installation groove, and one end of each V-phase IGBT module is connected with a lower layer output terminal assembly, the top of water cooling plate is further provided with three U-phase IGBT modules that are parallel to each other and three W-phase IGBT modules that are parallel to each other, and one end of three U-phase IGBT modules and one end of three W-phase IGBT modules are connected with an upper layer output terminal assembly.

2. The connection structure of the film capacitor of the electric vehicle controller and the IGBT module according to claim 1, characterized in that, The upper layer output terminal assembly comprises an upper layer output positive terminal and an upper layer output negative terminal, and the lower layer output terminal assembly comprises a lower layer output positive terminal and a lower layer output negative terminal.

3. The connection structure of the film capacitor of the electric vehicle controller and the IGBT module according to claim 1, characterized in that, One side in the first cavity is further provided with a first installation cavity, the film capacitor is installed in the first installation cavity, and the let -place hole is through to the first installation cavity.

4. The connection structure of a thin film capacitor of an electric vehicle controller and an IGBT module according to claim 1, characterized in that, The top of control casing is further provided with a top cover for sealing the first cavity.

5. The connection structure of a thin film capacitor of an electric vehicle controller and an IGBT module according to claim 1, characterized in that, The top edge of control casing is further provided with a first clamping groove in annular structure, and a sealing ring is embedded in the first clamping groove.

6. The connection structure of a thin film capacitor of an electric vehicle controller and an IGBT module according to claim 1, characterized in that, The first installation groove is further detachably provided with a bottom cover.

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