Power module and vehicle
By setting up an insulated retaining wall in the power module and forming it in one piece with the shell, the problem of vulnerability between positive and negative terminals caused by contamination is solved, which improves safety and reliability and simplifies the assembly process.
Patent Information
- Application Number
- CN202420544785.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-03-19
AI Technical Summary
The positive and negative terminals of the existing power module are susceptible to the influence of contaminants, condensation, abnormal voltage, large current, and tin whisker growth, resulting in reduced safety and reliability of use. .
By setting an insulating retaining wall between the positive electrode terminal and the negative electrode terminal of the power module and forming it integrally with the housing, the positive electrode terminal and the negative electrode terminal are effectively isolated, thereby preventing failure.
It improves the safety and reliability of the power module, reduces the number of parts, improves assembly efficiency, and enhances the connection strength between the insulated retaining wall and the shell.
Smart Images
Figure CN222507635U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of power electronics technology, and in particular to a power module and a vehicle. Background Art
[0002] With the development of power electronics technology, power modules have attracted more and more attention. Power modules are devices that combine multiple semiconductor chips according to certain functions and modes and are potted into one. They can be mainly used in the power circuit of power electronics systems and are the core hardware for realizing power conversion. However, the positive and negative terminals of power modules in related technologies are easily affected by pollutants (such as metal particles), condensation, abnormal voltage, high current, tin whisker growth, etc., which may cause arcing, discharge, breakdown and other failures, thereby reducing the safety and reliability of the use of power modules. Utility Model Content
[0003] In order to solve the above technical problems, the present application provides a power module and a vehicle, which are used to improve the safety and reliability of the use of the power module.
[0004] In a first aspect, an embodiment of the present application provides a power module, comprising a power terminal, a housing, and an insulating retaining wall. The power terminal comprises a positive terminal and a negative terminal. The power terminal is disposed at one end of the housing. The insulating retaining wall is integrally formed with the housing, the insulating retaining wall is located between the positive terminal and the negative terminal, and the orthographic projections of the positive terminal and the negative terminal on the plane where the insulating retaining wall is located are located within the insulating retaining wall.
[0005] According to the power module of the embodiment of the present application, by setting an insulating retaining wall between the positive terminal and the negative terminal, and making the insulating retaining wall effectively isolate the positive terminal and the negative terminal, it is possible to prevent the occurrence of failures such as arcing, discharge, and breakdown caused by pollutants, condensation, abnormal voltage, high current, tin whisker growth, etc., which is beneficial to improve the safety and reliability of the use of the power module. At the same time, the insulating retaining wall and the shell are integrally formed to improve the connection strength between the insulating retaining wall and the shell, and can also achieve seamless isolation of the positive terminal and the negative terminal, thereby further improving the safety and reliability of the use of the power module. In addition, the number of parts of the power module can also be reduced, which is beneficial to improve the assembly efficiency of the power module.
[0006] In a possible implementation, the power module further includes a protrusion, and the protrusion extends from an edge of the insulating retaining wall in a direction away from the housing.
[0007] In a possible implementation manner, the extension length of the protrusion is greater than or equal to 0.5 mm.
[0008] In one possible implementation, the power module also includes an isolation member, and isolation members are provided on both sides of the insulating retaining wall close to the positive terminal and the negative terminal, the orthographic projections of the positive terminal and the negative terminal on the plane where the isolation member is located are located inside the isolation member, and the isolation member extends in a direction away from the insulating retaining wall.
[0009] In a possible implementation manner, an extension length of the spacer is greater than or equal to 1 mm.
[0010] In a possible implementation, the orthographic projection of the isolation member on the plane where the protruding member is located is located outside the protruding member.
[0011] In one possible implementation, the isolation member includes a first isolation member and a second isolation member, the first isolation member is arranged on the side of the insulating barrier wall close to the positive terminal, the second isolation member is arranged on the side of the insulating barrier wall close to the negative terminal, and the orthographic projection on the plane where the first isolation member is located is located inside the first isolation member.
[0012] In a possible implementation, the insulating retaining wall, the protruding member and the isolating member are an integrally formed member.
[0013] In a possible implementation, the housing and the insulating retaining wall are plastic parts.
[0014] In a second aspect, the present application provides a vehicle, comprising the above-mentioned power module.
[0015] Among them, the technical effects brought about by any design method in the second aspect can refer to the technical effects brought about by different design methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0018] Figure 1 A schematic diagram of a power module provided in some embodiments of the present application;
[0019] Figure 2 A three-dimensional diagram of a power module provided in some embodiments of the present application;
[0020] Figure 3 A front view of a power module provided in some embodiments of the present application;
[0021] Figure 4 Schematic diagram of a power module provided in some other embodiments of the present application;
[0022] Figure 5 A three-dimensional diagram of a power module provided in some other embodiments of the present application.
[0023] Reference numerals:
[0024] 100. Power module;
[0025] 1. Power terminal; 11. Positive terminal; 12. Negative terminal;
[0026] 2. Shell;
[0027] 3. Insulation retaining wall; 31. Groove;
[0028] 4. Raised parts;
[0029] 5. Isolation piece; 51. First isolation piece; 52. Second isolation piece. DETAILED DESCRIPTION
[0030] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0032] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. In addition, the directional terms mentioned in the embodiments of the present application, such as "inside", "outside", etc., are only references to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.
[0033] In the description of the embodiments of the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.
[0034] At present, silicon carbide (SiC) power modules, insulated gate bipolar transistor (IGBT) power modules, etc. are increasingly being used in the field of new energy vehicles. However, the positive and negative terminals of power modules of related technologies are susceptible to arcing, discharge, breakdown and other failures caused by pollutants (such as metal particles), condensation, abnormal voltage, high current, tin whisker growth, etc., thereby reducing the safety and reliability of the power modules.
[0035] In order to solve the above technical problems, the present application provides a vehicle. The vehicle includes a power module.
[0036] The power module of the embodiment of the present application is described below.
[0037] See also Figure 1 , Figure 1 Schematic diagram of a power module provided in some embodiments of the present application. The power module 100 provided in the embodiment of the present application comprises a power terminal 1 , a housing 2 and an insulating retaining wall 3 .
[0038] The power terminal 1 may be provided at one end of the housing 2. The power terminal 1 may include a positive terminal 11 and a negative terminal 12. Specifically, there is a gap between the positive terminal 11 and the negative terminal 12, and the positive terminal 11 and the negative terminal 12 are connected to the housing 2 and are located on the same side of the housing 2.
[0039] The insulating retaining wall 3 is connected to the housing 2, and the insulating retaining wall 3 can be located between the positive terminal 11 and the negative terminal 12. Thus, by providing the insulating retaining wall 3, the creepage distance between the positive terminal 11 and the negative terminal 12 can be increased, thereby preventing the occurrence of failures such as arcing and breakdown between the positive terminal 11 and the negative terminal 12 to a certain extent.
[0040] The orthographic projections of the positive terminal 11 and the negative terminal 12 on the plane where the insulating barrier 3 is located are located inside the insulating barrier 3. Specifically, the orthographic projection of the positive terminal 11 on the plane where the insulating barrier 3 is located is the first projection, and the orthographic projection of the negative terminal 12 on the plane where the insulating barrier 3 is located is the second projection, and both the first projection and the second projection are located inside the outline of the insulating barrier 3. Thus, the insulating barrier 3 can shield the positive terminal 11 and the negative terminal 12, and the positive terminal 11 and the negative terminal 12 can be effectively isolated, thereby preventing the occurrence of arcing, discharge, breakdown and other failures caused by pollutants (such as metal particles), condensation, abnormal voltage, high current, tin whisker growth and the like, thereby facilitating the improvement of the safety and reliability of the use of the power module 100.
[0041] The insulating retaining wall 3 and the shell 2 can be integrally formed, that is, the insulating retaining wall 3 and the shell 2 are an integral structural member. In this way, the connection strength between the insulating retaining wall 3 and the shell 2 can be improved, and the possibility of fracture between the insulating retaining wall 3 and the shell 2 can be reduced. At the same time, the positive terminal 11 and the negative terminal 12 can be effectively isolated without gaps, thereby further preventing the occurrence of arcing, discharge, breakdown and other failures caused by pollutants (such as metal particles), condensation, abnormal voltage, high current, tin whisker growth and the like. In addition, the integrally formed insulating retaining wall 3 and shell 2 can reduce the number of parts of the power module 100, which is beneficial to improving the assembly efficiency of the power module 100.
[0042] According to the power module 100 of the embodiment of the present application, by setting the insulating retaining wall 3 between the positive terminal 11 and the negative terminal 12, and making the insulating retaining wall 3 can effectively isolate the positive terminal 11 and the negative terminal 12, it is possible to prevent the occurrence of failures such as arcing, discharge, and breakdown caused by pollutants (such as metal particles), condensation, abnormal voltage, high current, tin whisker growth, etc., which is conducive to improving the safety and reliability of the use of the power module 100. At the same time, the insulating retaining wall 3 and the shell 2 are integrally formed to improve the connection strength between the insulating retaining wall 3 and the shell 2, and can also achieve seamless isolation of the positive terminal 11 and the negative terminal 12, thereby further improving the safety and reliability of the use of the power module 100. In addition, the number of parts of the power module 100 can also be reduced, which is conducive to improving the assembly efficiency of the power module 100.
[0043] See also Figure 2 , Figure 2A three-dimensional diagram of a power module provided for some embodiments of the present application. In some embodiments, the power module 100 may further include a protrusion 4. The protrusion 4 may extend from the edge of the insulating barrier 3 in a direction away from the shell 2. Specifically, one end of the protrusion 4 is connected to the end of the insulating barrier 3 away from the shell 2, and the other end of the protrusion 4 extends in a direction away from the shell 2, then the positive projection of the positive terminal 11 and the negative terminal 12 on the plane where the protrusion 4 is located is located outside the protrusion 4, or the edge of the positive terminal 11 and the negative terminal 12 away from the shell 2 coincides with the edge of the protrusion 4 close to the shell 2. Thus, the length of the insulating barrier 3 can be extended by the protrusion 4, so that the protrusion 4 and the insulating barrier 3 can completely isolate the positive terminal 11 and the negative terminal 12, thereby strengthening the isolation effect of the insulating barrier 3, and further improving the safety and reliability of the power module 100.
[0044] See also Figure 2 and Figure 3 , Figure 3 A front view of a power module provided in some embodiments of the present application. In some embodiments, the extension length L of the protrusion 4 is greater than or equal to 0.5 mm. By limiting the minimum extension length of the protrusion 4, it can be ensured that the protrusion 4 and the insulating barrier 3 can completely isolate the positive terminal 11 and the negative terminal 12, thereby ensuring the isolation effect of the insulating barrier 3.
[0045] Exemplarily, the extension length L of the protrusion 4 may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm, etc.
[0046] See also Figure 4 , Figure 4 Schematic diagram of a power module provided for other embodiments of the present application. In some embodiments, the power module 100 may further include an isolator 5. Isolators 5 may be provided on both sides of the insulating barrier 3 close to the positive terminal 11 and the negative terminal 12. The orthographic projections of the positive terminal 11 and the negative terminal 12 on the plane where the isolator 5 is located are located inside the isolator 5. The isolator 5 extends in a direction away from the insulating barrier 3. Specifically, isolators 5 are provided on opposite sides of the insulating barrier 3, the isolator 5 on one side is located between the positive terminal 11 and the insulating barrier 3, and the isolator 5 on the other side is located between the negative terminal 12 and the insulating barrier 3. The orthographic projection of the positive terminal 11 on the plane where the isolator 5 is located is the third projection, and the orthographic projection of the negative terminal 12 on the plane where the isolator 5 is located is the fourth projection, and both the third projection and the fourth projection are located inside the isolator 5.
[0047] Thus, by providing the spacer 5, a gap can be provided between the insulating barrier 3 and the positive terminal 11 and the negative terminal 12, so that the positive terminal 11 and the negative terminal 12 can move up and down. At the same time, the positive terminal 11 and the negative terminal 12 can be prevented from being deformed when connected to other components, thereby increasing the disturbance of the positive terminal 11 and the negative terminal 12 so that the tolerance can be absorbed.
[0048] Please continue reading Figure 4 In some embodiments, the extension length M of the spacer 5 may be greater than or equal to 1 mm. Thus, by limiting the extension length of the spacer 5, it is possible to ensure that the spacing between the insulating barrier 3 and the positive terminal 11 and the negative terminal 12 is not too small, thereby increasing the creepage distance, preventing the plastic coating from overflowing, and increasing the interference of the positive terminal 11 and the negative terminal 12, thereby improving the safety and reliability of the power module 100.
[0049] Exemplarily, the extension length of the spacer 5 may be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm, etc.
[0050] It should be noted that, if the pollution level is 1, the extension length of the isolation member 5 may be greater than or equal to 0.25 mm.
[0051] See also Figure 5 , Figure 5 A three-dimensional diagram of a power module provided in some other embodiments of the present application. In some embodiments, the orthographic projection of the isolating member 5 on the plane where the protruding member 4 is located is located outside the protruding member 4. Specifically, the orthographic projection of the isolating member 5 on the plane where the protruding member 4 is located does not overlap with the protruding member 4. As a result, the material used for the isolating member 5 can be reduced, thereby reducing the manufacturing cost of the power module 100.
[0052] Please continue reading Figure 4 and Figure 5 In some embodiments, the spacer 5 may include a first spacer 51 and a second spacer 52. The first spacer 51 is disposed on the side of the insulating barrier 3 close to the positive terminal 11. The second spacer 52 is disposed on the side of the insulating barrier 3 close to the negative terminal 12, and the orthographic projection of the plane where the first spacer 51 is located is located inside the first spacer 51. Specifically, since the positive terminal 11 and the negative terminal 12 are in the thickness direction of the power module 100 (such as Figure 4 The first isolating member 51 and the second isolating member 52 are staggered in the Y-axis direction as shown, and the negative terminal 12 is located above the positive terminal 11. Then, in the thickness direction of the power module 100, the thickness of the first isolating member 51 is greater than the thickness of the second isolating member 52.
[0053] Therefore, the thickness of the first separator 51 and the second separator 52 can be changed according to the position of the positive terminal 11 and the negative terminal 12 , so that the manufacturing cost of the power module 100 can be better reduced.
[0054] It should be noted that the thickness of the first isolation member 51 may also be the same as the thickness of the second isolation member 52 . Such a configuration can improve the versatility of the power module 100 .
[0055] Please continue reading Figure 5 , illustratively, a groove 31 may be provided on the insulating retaining wall 3. The groove 31 may be located in the thickness direction of the insulating retaining wall 3 ( Figure 5 Thus, the creepage distance can be increased.
[0056] In some embodiments, the insulating retaining wall 3, the protruding member 4 and the isolating member 5 are an integrally formed member. Specifically, the housing 2, the insulating retaining wall 3, the protruding member 4 and the isolating member 5 are an integrally formed member. Thus, the reliability of the connection between the insulating retaining wall 3, the protruding member 4 and the isolating member 5 can be improved, and the number of parts of the power module 100 can be reduced, thereby improving the assembly efficiency of the power module 100.
[0057] In some embodiments, the housing 2 and the insulating retaining wall 3 are plastic parts. Thus, the housing 2 and the insulating retaining wall 3 can be formed into an integral part by injection molding, which is conducive to reducing the manufacturing difficulty of the power module 100. At the same time, the plastic part has a good insulation effect and a low cost, thereby reducing the manufacturing cost of the power module 100.
[0058] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.
[0059] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A power module, characterized in that: The power module comprises: a power terminal, the power terminal comprising a positive terminal and a negative terminal, A housing, wherein the power terminal is disposed at one end of the housing; An insulating retaining wall is integrally formed with the shell, the insulating retaining wall is located between the positive terminal and the negative terminal, and the orthographic projections of the positive terminal and the negative terminal on the plane where the insulating retaining wall is located are located within the insulating retaining wall.
2. The power module according to claim 1, characterized in that: The power module further includes a protrusion extending from an edge of the insulating retaining wall in a direction away from the housing.
3. The power module according to claim 2, characterized in that: The extension length of the protrusion is greater than or equal to 0.5 mm.
4. The power module according to claim 2, characterized in that: The power module also includes an isolating member, and the isolating members are provided on both sides of the insulating retaining wall close to the positive terminal and the negative terminal. The orthographic projections of the positive terminal and the negative terminal on the plane where the isolating member is located are located inside the isolating member, and the isolating member extends in a direction away from the insulating retaining wall.
5. The power module according to claim 4, characterized in that: The extension length of the isolation piece is greater than or equal to 1 mm.
6. The power module according to claim 4, characterized in that: The orthographic projection of the isolation member on the plane where the protruding member is located is located outside the protruding member.
7. The power module according to claim 4, characterized in that: The isolation member includes a first isolation member and a second isolation member. The first isolation member is arranged on a side of the insulating barrier wall close to the positive terminal, and the second isolation member is arranged on a side of the insulating barrier wall close to the negative terminal, and the orthographic projection of the first isolation member on the plane where the first isolation member is located is located inside the first isolation member.
8. The power module according to claim 4, characterized in that: The insulating retaining wall, the protruding member and the isolating member are integrally formed.
9. The power module according to claim 1, characterized in that: The shell and the insulating retaining wall are plastic parts.
10. A vehicle, characterized in that: The invention comprises a power module as claimed in any one of claims 1 to 9.