CN219718098U - Inverter housing, inverter and vehicle - Google Patents

Abstract

The utility model relates to an inverter housing, dc-to-ac converter and vehicle, inverter housing are used for the high voltage inverter of electric motor car, inverter housing includes shell body (10), is used for holding first cavity (11) of filter module (2) and is used for holding second cavity (12) of electric capacity module, inverter housing is integrated into one piece structure and adopts high temperature nylon plastics material. In the inverter housing provided by the disclosure, the whole housing is integrally molded by adopting an injection molding process, so that the mechanical strength of the housing can be ensured, the assembly procedure is reduced, the housing is made of high-temperature nylon plastic, the weight of the housing can be reduced on the premise of ensuring the strength of the housing, the light-weight design is realized, and meanwhile, the inverter housing has good corrosion resistance and the service life of the housing is prolonged.

Description

Inverter housing, inverter and vehicle

Technical Field

The present disclosure relates to the field of electronics, and more particularly to an inverter housing, an inverter, and a vehicle.

Background

The high-voltage inverter for the electric vehicle can convert direct current into alternating current. In the related art, the inverter housing is made of die-cast aluminum or die-cast magnesium alloy, the weight of the inverter housing made of die-cast aluminum is large, the design requirement of light weight cannot be met, and the inverter housing made of die-cast magnesium alloy has large potential difference with metal screws such as iron, aluminum and the like because magnesium is bivalent active wave metal, electrochemical corrosion is extremely easy to occur in a humid environment, and the service life of the housing is influenced.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides an inverter housing, an inverter, and a vehicle.

According to a first aspect of the disclosed embodiments, an inverter housing is provided for a high voltage inverter of an electric vehicle, the inverter housing includes a housing body, a first cavity for accommodating a filter module, and a second cavity for accommodating a capacitor module, and the inverter housing is of an integral structure and is made of high temperature nylon plastic.

Optionally, one of the first cavity and the second cavity is protruded outwards from the shell body, the other cavity is recessed inwards, the openings of the first cavity and the second cavity face opposite, and the filter module and the capacitor module are respectively installed in the first cavity and the second cavity in an embedded mode.

Optionally, the housing body has at least a first cooling flow passage arranged through the first cavity, and both ends of the first cooling flow passage are formed as an inlet and an outlet, respectively.

Optionally, the shell body further has a second cooling flow passage disposed between the first cavity and the second cavity in parallel with the first cooling flow passage, the second cooling flow passage is disposed close to a side wall of the second cavity, the first cooling flow passage and the second cooling flow passage are communicated at a middle position, an end of one of them is formed as the inlet, and the other opposite end is formed as the outlet.

Optionally, the shell body is further provided with a plurality of reinforcing plates connected between the first cooling flow channel and the second cooling flow channel, and the plurality of reinforcing plates are arranged at intervals.

Optionally, the inverter housing adopts high-temperature nylon plastic as a matrix, carbon fiber fillers are doped in the matrix, and the carbon fiber fillers are uniformly distributed at different positions of the inverter housing.

Optionally, the carbon fiber filler is of unequal length and inversely proportional to the thickness of the inverter housing.

Optionally, the electromagnetic shielding capability of the inverter housing is between 40-80 dB.

According to a second aspect of embodiments of the present disclosure, there is provided an inverter including the inverter housing described above, and a filter module and a capacitor module mounted within the inverter housing.

According to a third aspect of embodiments of the present disclosure, there is provided a vehicle including the inverter described above.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: in the inverter housing provided by the disclosure, the whole housing is integrally molded by adopting an injection molding process, so that the mechanical strength of the housing can be ensured, the assembly procedure is reduced, the housing is made of high-temperature nylon plastic, the weight of the housing can be reduced on the premise of ensuring the strength of the housing, the light-weight design is realized, and meanwhile, the inverter housing has good corrosion resistance and the service life of the housing is prolonged.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram showing a structure of an inverter according to an exemplary embodiment.

Fig. 2 is a schematic structural view of an inverter case according to an exemplary embodiment.

Description of the reference numerals

10-a shell body; 11-a first cavity; 12-a second cavity; a 2-filtering module; 3-fastening holes; 41-a first cooling flow path; 42-a second cooling flow path; 401-inlet; 402-outlet; 43-reinforcing plate.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

It should be noted that, all actions of acquiring signals, information or data in the present utility model are performed under the condition of conforming to the corresponding data protection rule policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.

In this disclosure, unless otherwise indicated, terms of orientation such as "inner" and "outer" are used to refer to the inner and outer of the respective component profiles. The use of the terms first, second, etc. are used for the purpose of distinguishing between different elements and not necessarily for the sake of order or importance. Furthermore, in the following description, when referring to the drawings, the same reference numerals in different drawings denote the same or similar elements unless otherwise explained.

As shown in fig. 1 and 2, the present disclosure provides an inverter housing that may be used for a high voltage inverter of an electric vehicle, the inverter housing including a housing body 10, a first cavity 11 for accommodating a filter module 2, and a second cavity 12 for accommodating a capacitor module (not shown), and the inverter housing may be of an integral structure and made of a high temperature nylon plastic (Polyphthalamide) material. The inverter housing made of high-temperature nylon plastic is lower than the inverter housing made of aluminum alloy in weight by 60% under the condition of ensuring the same tensile strength, has enough strength, rigidity and stability, and can meet the strength requirement of the housing in mechanical property. The first cavity 11 and the second cavity 12 can be arranged in various ways, can be adaptively designed according to the shape and the size of the accommodating part, can be integrally formed by adopting an injection molding process, and is convenient to process.

Through above-mentioned technical scheme, in the dc-to-ac converter casing that this disclosure provided, whole casing adopts injection molding technology integrated into one piece, can guarantee the mechanical strength of casing, reduces the assembly process, and the casing adopts high temperature nylon plastics material, under the prerequisite of guaranteeing casing intensity, can reduce the weight of casing, realizes light-weighted design, has good corrosion resistance simultaneously, improves the life of casing.

The first cavity 11 and the second cavity 12 may be formed in various ways. In an exemplary embodiment of the present disclosure, as shown in fig. 2, one of the first and second cavities 11 and 12 is outwardly protruded from the case body 10, and the other is inwardly concaved to form the first and second cavities 11 and 12 with openings facing opposite directions, and the filter module 2 and the capacitor module are respectively mounted in the first and second cavities 11 and 12 in an embedded manner. In this embodiment, the first cavity 11 protrudes outward from the case body 10, the second cavity 12 is recessed inward, and after protruding and recessing, the first cavity 11 and the second cavity 12 do not increase the original thickness of the case body 10, that is, are both in the same plane, so that the filter module 2 and the capacitor module are mounted from both sides of the case body 10, respectively, interference does not occur, the space on the case body 10 can be fully utilized, and a plurality of module components can be integrally mounted on the case body 10. As shown in fig. 2, a plurality of protruding connecting columns are disposed in the first cavity 11, and the filter module 2 may be detachably mounted on the connecting columns through fasteners, however, in other embodiments, the filter module 2 and the capacitor module may be fixed in the corresponding cavities by fastening or bonding, so as to be more convenient to detach and install.

The high voltage inverter generates a large amount of heat during operation, and in order to efficiently dissipate heat, in an exemplary embodiment of the present disclosure, the case body 10 has at least a first cooling flow passage 41 disposed through the first cavity 11, and both ends of the first cooling flow passage 41 are formed as an inlet 401 and an outlet 402, respectively. Here, the cooling liquid may be water, glycerol, ethylene glycol, or the like, or may be cooling gas, and in the process that the cooling liquid flows from the inlet 401 to the outlet 402, heat generated in the working process of the filtering module 2 can be timely taken away, so that normal working of components is ensured. The trend and arrangement mode of the cooling flow channels can be designed according to the needs and actual conditions.

In another exemplary embodiment of the present disclosure, as shown in fig. 1 and 2, the case body 10 further has a second cooling flow passage 42 disposed in parallel with the first cooling flow passage 41 between the first cavity 11 and the second cavity 12, the second cooling flow passage 42 being disposed near a side wall of the second cavity 12, the first cooling flow passage 41 and the second cooling flow passage 42 being communicated at a middle position (may be at any position before the first cooling flow passage 41 enters the first cavity 11) and an end of one of them being formed as an inlet 401 and the other end of the other opposite end being formed as an outlet 402. The cooling liquid in the second cooling flow channel 42 can cool the capacitor module, and the above arrangement mode can fully utilize the position between the first cavity 11 and the second cavity 12, and simultaneously, the first cooling flow channel 41 and the second cooling flow channel 42 are communicated, and the two cooling flow channels can share the same inlet 401 and outlet 402, so that the flow path of the cooling liquid is prolonged, and the overall heat dissipation effect is improved. In other embodiments, the communication manner between the first cooling flow channel 41 and the second cooling flow channel 42 may be designed, for example, the communication between the end near the inlet 401 or the end near the outlet 402, so that the cooling liquid can be distributed in more positions of the housing, and a good cooling effect is achieved.

In the present disclosure, as shown in fig. 2, a plurality of reinforcing plates 43 connected between the first cooling flow path 41 and the second cooling flow path 42 are further provided on the case body 10, and the plurality of reinforcing plates 43 are arranged at intervals. The plurality of reinforcing plates 43 may have any appropriate shape, and can increase the rigidity of the entire inverter case, thereby securing the mechanical properties thereof.

When injection molding is carried out, the inverter shell can adopt high-temperature nylon plastic as a matrix, carbon fiber fillers are doped in the matrix, and the carbon fiber fillers can be uniformly distributed at different positions of the inverter shell. Like this, before carrying out injection moulding, through fully mixing both, carbon fiber filler and high temperature nylon plastic particle carry out random distribution in the injection moulding process, can exist metal fiber at the casing surface after the product shaping, cause the product to have certain conductivity, thereby have certain electromagnetic shielding ability, the support strength of dc-to-ac converter casing is realized through high temperature nylon plastics, electromagnetic shielding function is realized by the carbon fiber that inside was filled, thereby avoid sending noise interference to outside, restrain outside interference and introduce inside the dc-to-ac converter simultaneously, guarantee the stability of dc-to-ac converter operation. And the carbon fiber filler is added in the injection molding process of the inverter shell, so that the conductive layer is not required to be independently processed in the later period, and the processing procedure is saved.

The carbon fiber filler may be of unequal length, and the length of the carbon fiber filler is inversely proportional to the thickness of the inverter housing. Namely, when the thickness of the inverter shell is thinner, the electromagnetic shielding capability is required, carbon fiber fillers with longer lengths can be selected, and the electromagnetic shielding effect is improved; in contrast, the thicker the inverter housing, the shorter the carbon fiber filler can be selected, and the length and the content of the carbon fiber filler can be adjusted according to the thickness of the inverter housing, so as to adjust the electromagnetic shielding effect of the inverter housing, for example, the electromagnetic shielding capability can reach 50-60dB under the condition that the thickness of the inverter housing is 2mm, and the shielding effect can reach 60-80dB under the thickness of 1 mm.

In the present disclosure, by adjusting the thickness of the inverter housing, the length, the content, etc. of the carbon fiber filler, the electromagnetic shielding capability of the inverter housing provided by the present disclosure is between 40 dB and 80dB, and has a good electromagnetic shielding effect.

According to a second aspect of the present disclosure, there is also provided an inverter, which may be a high-voltage inverter for an electric vehicle, including the above-described inverter housing and components such as the filter module 2 and the capacitor module mounted on the inverter housing, which can simultaneously satisfy various requirements of mechanical strength, light weight, corrosion resistance, and the like.

According to a third aspect of the present disclosure, there is also provided a vehicle comprising the inverter described above. The vehicle has all the advantageous effects of the inverter housing and the inverter described above, and will not be described here again. The shell body 10 of dc-to-ac converter's periphery is provided with the turn-ups, has seted up a plurality of fastening holes on the turn-ups, can install this dc-to-ac converter detachably to the suitable position of vehicle, the maintenance of being convenient for and change.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. The utility model provides an inverter housing for electric motor car's high voltage inverter, its characterized in that, inverter housing includes the shell body, is used for holding the first cavity of filter module and is used for holding the second cavity of electric capacity module, inverter housing is integrated into one piece structure and adopts high temperature nylon plastics material.

2. The inverter housing of claim 1, wherein one of the first and second cavities is outwardly convex and the other is inwardly concave by the housing body, the openings of the first and second cavities being oppositely facing, the filter and capacitor modules being mounted embedded in the first and second cavities, respectively.

3. The inverter case according to claim 1, wherein the case body has at least a first cooling flow passage disposed through the first cavity, both ends of the first cooling flow passage being formed as an inlet and an outlet, respectively.

4. The inverter case according to claim 3, wherein the case body further has a second cooling flow passage disposed in parallel with the first cooling flow passage between the first cavity and the second cavity, the second cooling flow passage being disposed near a side wall of the second cavity, the first cooling flow passage and the second cooling flow passage being communicated at a central position with an end of one of them being formed as the inlet and an opposite end of the other being formed as the outlet.

5. The inverter housing of claim 4, wherein the housing body is further provided with a plurality of reinforcing plates connected between the first cooling flow passage and the second cooling flow passage, and a plurality of the reinforcing plates are arranged at intervals.

6. The inverter casing according to any one of claims 1-5, wherein the inverter casing adopts high temperature nylon plastic as a matrix, carbon fiber fillers are doped in the matrix, and the carbon fiber fillers are uniformly distributed at different parts of the inverter casing.

7. The inverter casing of claim 6, wherein the carbon fiber filler is unequal in length and inversely proportional to the thickness of the inverter casing.

8. The inverter casing of claim 7, wherein the electromagnetic shielding capability of the inverter casing is between 40-80 dB.

9. An inverter comprising the inverter housing of any one of claims 1-8 and a filter module and a capacitor module mounted within the inverter housing.

10. A vehicle comprising the inverter of claim 9.