Electric drive assembly system and vehicle

Abstract

An electric drive assembly system (10) is disclosed, comprising: a housing (100) defining a first cavity (110) and a second cavity (120) in fluid communication with each other; a motor assembly (200) arranged in the first cavity (110); a transmission assembly (300) arranged in the second cavity (120); and an oil delivery device (400) having an oil cavity (410). A first oil circulation duct (150) connecting the first cavity (110) to the oil cavity (410), and a second oil circulation duct (160) connecting the second cavity (120) to the oil cavity (410), are provided in the housing (100), so that oil in the first cavity (110) is able to enter the oil cavity (410) via the first oil circulation duct (150), and oil in the second cavity (120) is able to enter the oil cavity (410) via the second oil circulation duct (160). A vehicle comprising such an electric drive assembly system is also disclosed.

Description

[0001] ELECTRIC DRIVE ASSEMBLY SYSTEM AND VEHICLE

[0002] Technical Field

[0003] The present disclosure relates to an electric drive assembly system which may be used in a vehicle, such as an electric vehicle or a hybrid vehicle. The present disclosure further relates to a vehicle that comprises such an electric drive assembly system.

[0004] Background

[0005] An electric drive assembly system is the central source of motive power in an electric or hybrid vehicle, for example, and generally comprises a motor assembly and a transmission assembly, the transmission assembly for example being a gearbox. Moving components of the motor assembly and the transmission assembly will experience high-speed rotation during operation. The electric drive assembly system contains circulating lubricating oil for lubricating the various constituent components of the motor assembly and the transmission assembly, to ensure that these components are in a favourable operating state. In the prior art, it is known that in order to circulate, lubricating oil is sucked from a transmission assembly cavity, for example the gearbox, by means of an oil delivery device comprising an oil pump, for example. However, when the vehicle is tilted due to certain road conditions or other reasons, this might cause the oil to mainly accumulate in positions where it cannot be sucked by the oil delivery device; for example, it might be mainly located in a cavity of the motor assembly, and consequently, effective circulation of lubricating oil among the various components cannot be guaranteed. This will result in certain components being unable to operate smoothly due to inadequate lubrication, and will also result in components of the motor assembly experiencing excessive oil resistance during rotation; this will impair the operating performance of the electric drive assembly system, and may even damage certain constituent components thereof.

[0006] Thus, there is still a need for a novel electric drive assembly system that is capable of overcoming the abovementioned technical problem while bringing other advantages.

[0007] Summary of the Invention

[0008] A first aspect of the present disclosure proposes an electric drive assembly system. According to an embodiment, the electric drive assembly system comprises: a housing, defining a first cavity and a second cavity in fluid communication with each other; a motor assembly, arranged in the first cavity; a transmission assembly, arranged in the second cavity; and an oil delivery device, having an oil cavity; wherein a first oil circulation duct connecting the first cavity to the oil cavity, and a second oil circulation duct connecting the second cavity to the oil cavity, are provided in the housing, so that oil in the first cavity is able to enter the oil cavity via the first oil circulation duct, and oil in the second cavity is able to enter the oil cavity via the second oil circulation duct.

[0009] In the embodiment above, since the first oil circulation duct connecting the first cavity provided with the motor assembly to the oil cavity of the oil delivery device, and the second oil circulation duct connecting the second cavity provided with the transmission assembly to the oil cavity of the oil delivery device, are simultaneously provided in the housing, it can be ensured that the oil delivery device is able to suck oil, via the first oil circulation duct and / or the second oil circulation duct, from the corresponding first cavity and / or second cavity, regardless of how the electric drive assembly system is tilted, for example, regardless of whether it is tilted towards the first cavity side or tilted towards the second cavity side, thus ensuring that oil is able to circulate effectively in the electric drive assembly system in any tilted state of the electric drive assembly system, and thus guaranteeing good operation of the various components of the electric drive assembly system, and the overall performance of the electric drive assembly system. In addition, having the first oil circulation duct and the second oil circulation duct provided in the housing of the electric drive assembly system ensures that the overall structure is compact, facilitating the integration of the electric drive assembly system in a limited space, for example in a vehicle.

[0010] According to various embodiments, the electric drive assembly system proposed in the present disclosure may further comprise one or more of the following further developments.

[0011] In some embodiments, the first oil circulation duct and / or the second oil circulation duct are integrally provided in the housing. This allows the first oil circulation duct and / or the second oil circulation duct to be provided in such a way that no additional space in the electric drive assembly system is occupied, further helping to achieve a compact overall structure and reducing the number of components, thereby simplifying manufacture and assembly, and increasing cost-effectiveness.

[0012] In some embodiments, the oil cavity is defined by a cavity wall of the oil delivery device, a first inlet and a second inlet being provided on the cavity wall; the first inlet is connected to the first oil circulation duct, and the second inlet is connected to the second oil circulation duct. This allows further simplification of the connection of the first oil circulation duct and the second oil circulation duct to the oil cavity of the oil delivery device.

[0013] In some embodiments, the electric drive assembly system further comprises a heat exchanger and a third oil circulation duct, the third oil circulation duct connecting an outlet of the oil cavity to an oil inlet of the heat exchanger. For example, the heat exchanger allows lubricating oil to be cooled.

[0014] In some embodiments, the third oil circulation duct is integrally provided in the housing. This allows the third oil circulation duct to be provided in such a way that no additional space in the electric drive assembly system is occupied, further helping to achieve a compact overall structure and reducing the number of components, thereby simplifying manufacture and assembly, and increasing cost-effectiveness.

[0015] In some embodiments, the oil delivery device is at least partially arranged in the housing. This further helps to achieve a compact overall structure of the electric drive assembly system.

[0016] In some embodiments, the housing is provided with a third cavity for receiving at least part of the cavity wall of the oil delivery device, and the first oil circulation duct, the second oil circulation duct and the third oil circulation duct open into the third cavity. This allows the oil delivery device to be held by the third cavity, simplifying the installation of the oil delivery device in place, and further helps to achieve a compact overall structure. In some embodiments, the oil delivery device is arranged close to an end of the first cavity that is remote from the second cavity. This enables the oil delivery device to suck oil from the first cavity when the electric drive assembly system is tilted towards this end of the first cavity.

[0017] In some embodiments, in a working position, the oil delivery device is positioned to correspond to a middle-lower part of the second cavity and the first cavity. This helps to ensure that the oil delivery device is able to suck oil from the first cavity and the second cavity successfully.

[0018] In some embodiments, the second oil circulation duct is arranged transversely to the first oil circulation duct. The first oil circulation duct and the second oil circulation duct can be flexibly designed in relation to each other, to ensure that the oil delivery device is able to suck oil from the first cavity and / or the second cavity when the electric drive assembly system is in a tilted state.

[0019] In some embodiments, the housing comprises a housing main body and a housing cover, the first cavity and the second cavity are arranged in the housing main body, and the housing main body is a one-piece member. This further helps to achieve a compact overall structure, and further reduces the number of components, simplifying manufacture and assembly, and increasing cost-effectiveness.

[0020] In some embodiments, the third cavity is arranged in the housing main body. This further helps to achieve a compact overall structure; it also allows the design and structure of the first oil circulation duct and the second oil circulation duct to be simplified, and thus makes it easier to connect the third cavity to the first cavity and the second cavity.

[0021] In some embodiments, the oil delivery device comprises an oil pump.

[0022] A second aspect of the present disclosure proposes a vehicle, which comprises the electric drive assembly system according to any one of the embodiments above, and thus has corresponding advantages and effects.

[0023] Brief Description of the Drawings

[0024] In order to explain the technical solution of embodiments of the present disclosure more clearly, the drawings that need to be used in the embodiments will be briefly described below. It should be understood that the drawings below show only some embodiments of the present disclosure, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings could be obtained according to these drawings without inventive effort. In the drawings:

[0025] Fig. 1 is a 3D perspective drawing of an electric drive assembly system according to an exemplary embodiment;

[0026] Fig. 2 is a cutaway 3D drawing of an electric drive assembly system according to an exemplary embodiment;

[0027] Fig. 3 is a cutaway 3D drawing of an electric drive assembly system according to an exemplary embodiment, with the oil delivery device shown in Fig. 2 removed;

[0028] Fig. 4 is another cutaway 3D drawing of an electric drive assembly system according to an exemplary embodiment;

[0029] Fig. 5 is a 3D perspective drawing of an oil delivery device of an electric drive assembly system according to an exemplary embodiment.

[0030] List of reference numerals

[0031] 10 Electric drive assembly system

[0032] 100 Housing

[0033] 110 First cavity

[0034] 120 Second cavity

[0035] 130 Third cavity

[0036] 150 First oil circulation duct

[0037] 160 Second oil circulation duct

[0038] 170 Third oil circulation duct

[0039] 180 Housing main body

[0040] 190 Housing cover

[0041] 200 Motor assembly

[0042] 300 Transmission assembly

[0043] 400 Oil delivery device

[0044] 410 Oil cavity

[0045] 420 Cavity wall 421 First inlet

[0046] 422 Second inlet

[0047] 423 Outlet

[0048] 430 Oil pump main body

[0049] 440 Actuating device

[0050] 500 Heat exchanger

[0051] Detailed Description of Embodiments

[0052] An electric drive assembly system and a vehicle according to embodiments of the present disclosure are described in detail below with reference to the drawings. To clarify the objective, technical solution and advantages of this practical disclosure, the technical solutions in embodiments of the present disclosure are described clearly and completely below in conjunction with the drawings in embodiments of the present disclosure; obviously, the embodiments described are some, not all, of the embodiments of the present disclosure.

[0053] Thus, the detailed description below of embodiments of the present disclosure provided in conjunction with the drawings is not intended to limit the claimed scope of the present disclosure, and merely shows selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art on the basis of the embodiments in the present disclosure without inventive effort are included in the scope of protection of the present disclosure.

[0054] Unless otherwise defined in the context, the singular includes the plural. Throughout this specification, the terms "comprising", "having", etc. are used herein to specify the existence of the mentioned characteristic, number, step, operation, element, component or combination thereof, without ruling out the existence or addition of one or more other characteristics, numbers, steps, operations, elements, components or combinations thereof.

[0055] In addition, although terms including ordinal numbers such as "first", "second", etc. may be used to describe various components, these components are not limited by these terms, which are merely used to differentiate one element from another. For example, without departing from the scope of the present disclosure, a first component may be referred to as a second component and, similarly, a second component may be referred to as a first component.

[0056] In the description of the present invention, it must be understood that orientational or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer," etc. are based on the orientational or positional relationships shown in the drawings, or are the orientational or positional relationships in which the disclosed product is usually placed when used, or are the orientational or positional relationships commonly understood by those skilled in the art, and are merely intended to facilitate and simplify description of the present disclosure, rather than indicating or implying that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the present disclosure.

[0057] A first aspect of the present disclosure proposes an electric drive assembly system 10, which may for example be used in vehicles, including electric vehicles or hybrid vehicles. According to an embodiment, as shown in Figs. 1 - 4, the electric drive assembly system comprises a motor assembly 200 and a transmission assembly 300. Mechanical energy from the motor assembly 200 can be transferred to the transmission assembly 300, and the transmission assembly 300 can then transmit the mechanical energy, via a differential comprised in the transmission assembly, to external components such as vehicle wheels, so as to drive the wheels to move. In addition, the electric drive assembly system 10 further comprises a housing 100; the housing 100 can define a first cavity 110 for arranging the motor assembly 200 and a second cavity 120 for arranging the transmission assembly 300, and the first cavity 110 and the second cavity 120 may be arranged to be in fluid communication with each other. For example, the first cavity 110 and the second cavity 120 are in fluid communication with each other with regard to the oil, e.g. lubricating oil, that is present in the housing 100, so that oil in the first cavity 110 can flow into the second cavity 120 and vice versa. Oil can at least guarantee lubrication of the various constituent components of the motor assembly 200 and the transmission assembly 300, and thus ensure that they are in a favourable, smooth operating state. In addition, as shown in the figures, the electric drive assembly system 10 may further comprise an oil delivery device 400, which may have an oil cavity 410, wherein oil can be accommodated in the oil cavity 410. The oil delivery device 400 is configured to be able to suck oil from the first cavity 110 and / or the second cavity 120 under certain conditions, thus ensuring that oil circulates in the housing 100 of the entire electric drive assembly system 10 and lubricates the various components. To this end, in this embodiment, a first oil circulation duct 150 connecting the first cavity 110 to the oil cavity 410 of the oil delivery device 400, and a second oil circulation duct 160 connecting the second cavity 1 0 to the oil cavity 410 of the oil delivery device 400, may be further provided in the housing 100, so that oil in the first cavity 110 can enter the oil cavity 410 via the first oil circulation duct 150, and oil in the second cavity 120 can enter the oil cavity 410 via the second oil circulation duct 160.

[0058] Thus, in the electric drive assembly system 10 of the present disclosure, due to the fact that the abovementioned first oil circulation duct 150 and second oil circulation duct 160 are simultaneously provided in the housing 100, it can be ensured that the oil delivery device 400 is able to suck oil, via the first oil circulation duct 150 and / or the second oil circulation duct 160, from the corresponding first cavity 110 and / or the second cavity 120, even if the electric drive assembly system 10 is tilted, thus ensuring that oil is able to circulate effectively in the electric drive assembly system 10, and thus guaranteeing good operation of the various components of the electric drive assembly system 10, and the overall performance of the electric drive assembly system 10. In addition, having the first oil circulation duct 150 and the second oil circulation duct 160 provided in the housing 100 of the electric drive assembly system 10 ensures that the overall structure is compact, facilitating the integration of the electric drive assembly system 10 in a limited space, for example in a vehicle.

[0059] In some embodiments, as shown in Figs. 1 - 4, the electric drive assembly system 10 further comprises a heat exchanger 500. A refrigerant can circulate in the heat exchanger 500. The heat exchanger 500 may be configured to cool the oil in the housing 100. To this end, the oil delivery device 400 may also be configured to deliver oil, which has been sucked from the first cavity 110 and / or the second cavity 120, to the heat exchanger 500 to undergo oil cooling; specifically, oil cooling is achieved through heat exchange with the refrigerant circulating in the heat exchanger 500. To this end, as shown in Fig. 4, the electric drive assembly system 10 may further comprise a third oil circulation duct 170, the third oil circulation duct 170 being configured to connect an outlet 423 (shown in Fig. 5) of the oil cavity 410 of the oil delivery device 400 to an oil inlet (not shown) of the heat exchanger 500, to allow oil to be delivered from the oil cavity 410 to the heat exchanger. It should be noted that the position where the outlet 423 of the oil cavity 410 is arranged can change according to specific application needs; the embodiment shown in the figures is merely illustrative, and not restrictive.

[0060] In some embodiments, as shown in Figs. 2 - 4, the first oil circulation duct 150 and / or the second oil circulation duct 160 may be integrally provided in the housing 100 of the electric drive assembly system 10. This allows the first oil circulation duct 150 and / or the second oil circulation duct 160 to be integrated in the housing 100 in such a way that no additional space in the electric drive assembly system 10 is occupied, further helping to achieve a compact overall structure and reducing the number of components, thereby simplifying manufacture and assembly, and increasing cost-effectiveness. Alternatively, at least one of the first oil circulation duct 150 and the second oil circulation duct 160 may be formed of a tube that is provided independently of the housing 100; such a tube may be installed in place in the housing 100, for example by means of some fixing devices. In some embodiments, as shown in Figs. 2 - 3 and 5, the oil cavity 410 is defined by a cavity wall 420 of the oil delivery device 400. Further, a first inlet 421 for oil may also be provided on the cavity wall 420, wherein the first inlet 421 may be configured to be connected to the first oil circulation duct 150, thereby connecting the oil cavity 410 to the first cavity 110. More specifically, one end of the first oil circulation duct 150 may directly or indirectly lead to the first inlet 421, and another end of the first oil circulation duct 150 may directly or indirectly lead to the first cavity 110, e.g. lead directly to the first cavity 110. Further, a second inlet 422 for oil may also be provided in the cavity wall 420 of the oil delivery device 400, wherein the second inlet 422 may be configured to be connected to the second oil circulation duct 160, thereby connecting the oil cavity 410 to the second cavity 120. More specifically, one end of the second oil circulation duct 160 may directly or indirectly lead to the second inlet 422, and another end of the second oil circulation duct 160 may directly or indirectly lead to the second cavity 120, e.g. lead directly to the second cavity 120. This allows further simplification of the connection of the first oil circulation duct 150 and the second oil circulation duct 160 to the oil cavity 410 of the oil delivery device 400. It should be noted that the positions where the first inlet 421 and the second inlet 422 of the oil cavity 410 are arranged can change according to specific application needs; the embodiment shown in the figures is merely illustrative, and not restrictive.

[0061] In some embodiments, as shown in Figs. 2 - 3, the second oil circulation duct 160 may be arranged transversely to the first oil circulation duct 150. The first oil circulation duct 150 and the second oil circulation duct 160 can be flexibly designed in relation to each other, to ensure that the oil delivery device 400 is able to suck oil from the first cavity 110 and / or the second cavity 120 when the electric drive assembly system 10 is in a tilted state. It should be noted that the transverse orientation of the second oil circulation duct 160 relative to the first oil circulation duct 150 is merely adaptive, and not restrictive. For example, the second oil circulation duct could also be arranged so as to be substantially colinear with the first oil circulation duct, but to extend in substantially the opposite direction from the oil cavity 410 of the oil delivery device 400.

[0062] In some embodiments, as shown in Fig. 4, the third oil circulation duct 170 may also be integrally provided in the housing 100. This allows the third oil circulation duct 170 to be provided in such a way that no additional space in the electric drive assembly system 10 is occupied, further helping to achieve a compact overall structure and reducing the number of components, thereby simplifying manufacture and assembly, and increasing cost-effectiveness.

[0063] In an embodiment, as shown in Figs. 1 - 4, the housing 110 of the electric drive assembly system may comprise a housing main body 180 and a housing cover 190. The first cavity 110 and the second cavity 120 may both be provided in the housing main body 180. More specifically, the housing main body 180 may have an open end, wherein, for example, the motor assembly 200 and the transmission assembly 300 may be installed in place in the housing main body 180 via the open end, and the various components in the housing 100 may be accessed via the open end; and the housing cover 190 may be configured to cover the open end, so as to form an enclosed structure of the entire housing 100. In a specific embodiment, the housing cover 190 may be arranged at a drive end of the motor assembly 200. In a specific embodiment, the open end of the housing main body 180 is configured to comprise an open end of the first cavity 110 and an open end of the second cavity 120. In a specific embodiment, the housing cover 190 may be configured to simultaneously cover the open end of the first cavity 110 and the open end of the second cavity 120. In a specific embodiment, the housing main body 180 is a one- piece member. This further helps to achieve a compact overall structure, and further reduces the number of components, simplifying manufacture and assembly, and increasing cost-effectiveness.

[0064] In some embodiments, as shown in Figs. 1 - 4, the oil delivery device 400 may also be at least partially arranged in the housing 100, more specifically, at least partially arranged in the housing main body 180. This further helps to achieve a compact overall structure of the electric drive assembly system 10. In some embodiments, the housing 100 may also be provided with a third cavity 130 for receiving at least part of the oil delivery device 400, more specifically, for receiving at least part of the cavity wall 420 thereof, e.g. receiving the entire cavity wall 420 and thereby surrounding the oil cavity 410. In an embodiment, the third cavity 130 may be provided in the housing main body 180 of the housing 100. More specifically, the housing main body 180 is a one-piece member, and the third cavity 130 is integrally provided in the housing main body 180. This allows the oil delivery device 400 to be held by the third cavity 130, simplifying the installation of the oil delivery device 400 in place, and further helps to achieve a compact overall structure; it also allows the design and structure of the first oil circulation duct 150 and the second oil circulation duct 160 to be simplified, and thus makes it easier to connect the third cavity 130 to the first cavity 110 and the second cavity 120. In some embodiments, at least one of the first oil circulation duct 150, the second oil circulation duct 160 and the third oil circulation duct 170 may be configured to open into the third cavity 130, and thereby connect to the oil cavity 410 of the oil delivery device 400 via the third cavity 130. More specifically, the third cavity 130 may be provided with a first opening and a second opening respectively corresponding to the first inlet 421 and the second inlet 422 of the oil cavity 410, wherein the first opening and the second opening may be one end of the first oil circulation duct 150 and one end of the second oil circulation duct 160, respectively. More specifically, the third cavity 130 may also be provided with a third opening corresponding to the outlet 423 of the oil cavity 410, wherein the third opening may be one end of the third oil circulation duct 170.

[0065] In some embodiments, the oil delivery device 400 may comprise an oil pump, which may be a vane pump, but is not limited to being a vane pump. More specifically, the oil delivery device 400 may comprise an oil pump main body 430, and an actuating device 440, e.g. an electric motor, serving as a source of motive power for operation of the oil delivery device 400, as shown in Figs. 2 and 5. The oil cavity 410 is for example arranged in the oil pump main body 430. As shown in Figs. 1 - 2, the actuating device 440 may be arranged outside the housing 100, and the oil pump main body 430 may be arranged inside the housing 100, more specifically, in the third cavity 130 described above.

[0066] In some embodiments, as shown in Figs. 1 - 4, the oil delivery device 400 may be arranged close to an end of the first cavity 110 that is remote from the second cavity 120. This enables the oil delivery device 400 to suck oil from the first cavity 100 when the electric drive assembly system 10 is tilted towards this end of the first cavity 110. More specifically, as shown in the figures, the oil delivery device 400 may be arranged near an end of the housing 100 that faces away from the housing cover 190. More specifically, the first cavity 110 may be configured to project relative to the second cavity 120 in a direction away from the above- mentioned open end of the housing main body 180, and the oil delivery device 400 may be configured to correspond to a projecting part of the first cavity 110 relative to the second cavity 120.

[0067] In some embodiments, as shown in Figs. 1 - 4, in a working position, the oil delivery device 400 is positioned to correspond to a middle-lower part of the second cavity 120 and the first cavity 110. This helps to ensure that the oil delivery device 400 is able to suck oil from the first cavity 110 and the second cavity 120 successfully. In the sense of the present application, the working position is a position in which the electric drive assembly system 10 is arranged during normal operation, more specifically, a position in which it is installed in place on a vehicle. A second aspect of the present disclosure proposes a vehicle, which comprises the electric drive assembly system 10 according to any one of the embodiments above, and thus has corresponding advantages and effects. It should be noted that herein, the vehicle may be an electrified vehicle, for example, a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a range extended EV (REEV), or a fuel cell electric vehicle (FCEV). The vehicle may also be a hydrogen-powered vehicle.

[0068] Demonstrative embodiments of the electric drive assembly system and vehicle proposed in the present invention have been described in detail above with ref- erence to preferred embodiments. However, those skilled in the art will understand that without departing from the concept of the present invention, various modifications and alterations may be made to the specific embodiments above, and various technical features and structures proposed in the present invention may be combined in various ways, without exceeding the scope of protection of the present invention.

[0069] The scope of the present disclosure is not defined by the embodiments described above, but by the appended claims and their equivalent scope.

Claims

CLAIMS1. An electric drive assembly system (10), comprising: a housing (100), defining a first cavity (110) and a second cavity (120) in fluid communication with each other; a motor assembly (200), arranged in the first cavity (110); a transmission assembly (300), arranged in the second cavity (120); an oil delivery device (400), having an oil cavity (410); wherein a first oil circulation duct (150) connecting the first cavity (110) to the oil cavity (410), and a second oil circulation duct (160) connecting the second cavity (120) to the oil cavity (410), are provided in the housing (100), so that oil in the first cavity (110) is able to enter the oil cavity (410) via the first oil circulation duct (150), and oil in the second cavity (120) is able to enter the oil cavity (410) via the second oil circulation duct (160).

2. The electric drive assembly system (10) according to claim 1, wherein the first oil circulation duct (150) and / or the second oil circulation duct (160) are integrally provided in the housing (100).

3. The electric drive assembly system (10) according to claim 1 or 2, wherein the oil cavity (410) is defined by a cavity wall (420) of the oil delivery device (400), a first inlet (421) and a second inlet (422) being provided on the cavity wall (420), the first inlet (421) is connected to the first oil circulation duct (150), the second inlet (422) is connected to the second oil circulation duct (160).

4. The electric drive assembly system (10) according to claim 3, wherein the electric drive assembly system (10) further comprises a heat exchanger (500) and a third oil circulation duct (170), the third oil circulation duct (170) connecting an outlet (423) of the oil cavity (410) to an oil inlet of the heat exchanger (500).

5. The electric drive assembly system (10) according to claim 4, wherein the third oil circulation duct (170) is integrally provided in the housing (100).

6. The electric drive assembly system (10) according to claim 5, wherein the oil delivery device (400) is at least partially arranged in the housing (100).

7. The electric drive assembly system (10) according to claim 6, wherein thehousing (100) is provided with a third cavity (130) for receiving at least part of the cavity wall (420) of the oil delivery device (400), and the first oil circulation duct (150), the second oil circulation duct (160) and the third oil circulation duct (170) open into the third cavity (130).

8. The electric drive assembly system (10) according to any one of the preceding claims, wherein the oil delivery device (400) is arranged close to an end of the first cavity (110) that is remote from the second cavity (120).

9. The electric drive assembly system (10) according to any one of the preceding claims, wherein, in a working position, the oil delivery device (400) is positioned to correspond to a middle-lower part of the second cavity (120) and the first cavity (110).

10. The electric drive assembly system (10) according to any one of the preceding claims, wherein the second oil circulation duct (160) is arranged transversely to the first oil circulation duct (150).

11. The electric drive assembly system (10) according to any one of the preceding claims, wherein the housing (110) comprises a housing main body (180) and a housing cover (190), the first cavity (110) and the second cavity (120) are arranged in the housing main body (180), and the housing main body (180) is a one-piece member.

12. The electric drive assembly system (10) according to claim 11, wherein the third cavity (130) is arranged in the housing main body (180).

13. The electric drive assembly system (10) according to any one of the preceding claims, wherein the oil delivery device (400) comprises an oil pump.

14. A vehicle, comprising the electric drive assembly system (10) according to any one of claims 1 to 13.

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