Electric drive system and automobile
By setting a channel at the bottom of the motor assembly housing and integrating the electronic control assembly, eliminating the high-voltage wiring harness, and designing a high-low voltage isolation and cooling structure, the problem of large space occupation of the electric drive system is solved, achieving a smaller outer envelope space and higher electrical safety and cooling efficiency, while increasing the space of the car passenger compartment.
Patent Information
- Application Number
- CN202421128052.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-22
AI Technical Summary
In existing electric drive systems, the independent arrangement or external placement of the motor assembly and electronic control assembly results in a large occupation of the vehicle's interior space, reducing the space available for the passenger compartment.
The electronic control assembly is integrated into the bottom channel of the motor assembly housing and directly connected to the electronic control wiring copper busbar through the motor three-phase connector. The high-voltage wiring harness is eliminated, and an independent high and low voltage wiring harness cavity is designed to achieve electrical isolation. The cooling system uses an inclined spray nozzle and oil channel hole structure.
It reduces the proportion of the outer envelope space of the motor assembly and electronic control assembly, improves electrical safety and cooling efficiency, and increases the space of the car passenger compartment.
Smart Images
Figure CN222321320U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of electric drive systems, and specifically relates to electric drive systems and automobiles. Background Art
[0002] In some existing electric drive system solutions, the motor assembly and the electronic control assembly are arranged independently and connected by a high-voltage wire harness; in other solutions, the electronic control assembly is arranged outside the housing of the motor assembly. These design solutions will cause the motor assembly and the electronic control assembly to occupy a large space inside the car, thus reducing the passenger compartment space. Utility Model Content
[0003] One of the inventive purposes of the present application is to provide an electric drive system, which realizes the integrated design of the motor assembly and the electronic control assembly by disposing the electronic control assembly in the bottom channel of the shell in the motor assembly, thereby reducing the space occupied by the motor assembly and the electronic control assembly inside the car.
[0004] Another invention object of the present application is to provide a vehicle, wherein the vehicle includes the above-mentioned electric drive system.
[0005] According to an embodiment of the present application, a first aspect provides an electric drive system, the electric drive system comprising:
[0006] A motor assembly, the motor assembly comprising a housing, the bottom of the housing being provided with a channel facing downward;
[0007] An electric control assembly, wherein the electric control assembly is disposed in the channel and is integrally connected with the motor assembly;
[0008] An end cover is arranged at the bottom of the shell.
[0009] In one embodiment, a junction box is provided on the side of the shell, the motor assembly includes a motor three-phase connection socket, the electric control assembly includes an electric control wiring copper busbar, and the motor three-phase connection socket is connected to the electric control wiring copper busbar and is provided in the junction box.
[0010] In one embodiment, bolts are provided between the motor three-phase connection socket and the electric control wiring copper busbar.
[0011] In one embodiment, the junction box includes an independent first cavity and a second cavity, and the electric control assembly also includes a low-voltage wiring harness, which is arranged for the first cavity, and the motor three-phase connection socket and the electric control wiring copper busbar are arranged in the second cavity.
[0012] In one embodiment, the size of the second cavity is greater than the size of the first cavity.
[0013] In one embodiment, the junction box is further provided with a cover, and the cover closes the junction box.
[0014] In one embodiment, the stator assembly in the motor assembly is arranged in the shell, and the end plates on both sides of the rotor core in the motor assembly are provided with inclined spray outlets, wherein at least one of the spray outlets is set in a direction toward the stator assembly, and the cooling oil in the motor assembly can be sprayed toward the stator assembly along the spray outlet.
[0015] In one embodiment, an oil passage hole is provided in the middle of the rotating shaft of the motor assembly, and branch channels are provided on both sides of the oil passage hole, respectively, and the branch channels are connected to the spray ports in a one-to-one correspondence.
[0016] In one embodiment, the stator assembly and the terminal box are located on the same side of the housing, and the stator assembly is located on an upper side of the terminal box.
[0017] According to an embodiment of the present application, a second aspect provides a car, which includes the electric drive system.
[0018] The electric drive system in the present application is provided with a downward channel at the bottom of the housing of the motor assembly, and the electric control assembly is arranged in the channel, so as to realize the integrated design of the motor assembly and the electric control assembly in this way. Since the electric control assembly is located in the channel at the bottom of the housing, compared with the solution in which the electric control assembly is arranged outside the housing or the solution in which the motor assembly and the electric control assembly are arranged independently, the motor assembly and the electric control assembly occupy a smaller proportion of the outer envelope space, thereby being able to occupy a smaller proportion of the interior space of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of an electric drive system in one embodiment of the present application;
[0020] Figure 2 Schematic diagram of the structure of the electric drive system in one embodiment of the present application.
[0021] Description of Figure Numbers:
[0022] 100, housing; 110, passage; 120, junction box; 121, first cavity; 122, second cavity; 123, cover; 130, motor three-phase connection seat;
[0023] 200. Electric control wiring copper busbar;
[0024] 300. End cover; 400. Stator assembly. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0026] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.
[0027] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0028] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0029] As described in the background, in the existing electric drive system solutions, in some solutions, the motor assembly and the electronic control assembly will adopt an independent arrangement, and the motor assembly and the electronic control assembly will be connected by a high-voltage wiring harness; in other solutions, the electronic control assembly will be arranged outside the housing of the motor assembly. These design solutions will cause the motor assembly and the electronic control assembly to occupy a large space inside the car, thereby reducing the seating space in the passenger compartment. In order to better solve this problem, the researchers in this application integrated the design of the motor assembly and the electronic control assembly by providing a downward channel at the bottom of the housing of the motor assembly and arranging the electronic control assembly in the channel, so that the outer envelope space of the motor assembly and the electronic control assembly accounts for a smaller proportion, thereby reducing the overall space share of the motor assembly and the electronic control assembly inside the car.
[0030] like Figure 1 As shown, Figure 1 The schematic diagram of the structure of the electric drive system in one embodiment of the present application. The electric drive system includes a motor assembly, an electric control assembly and an end cover 300. In this embodiment, the researchers intend to integrate the electric control assembly at the bottom of the housing 100 in the motor assembly, thereby reducing the external envelope space proportion of the electric control assembly and the motor assembly as a whole.
[0031] Specifically, the motor assembly includes a housing 100, wherein a channel 110 facing downward is provided at the bottom of the housing 100; the electric control assembly is provided in the channel 110, and the electric control assembly is integrally connected with the motor assembly; and the end cover 300 is provided at the bottom of the housing 100. Figure 1 The channel 110 in the middle is the position pointed to by the partial cross-sectional view, that is, the channel 110 is located inside the housing 100 when located.
[0032] In this embodiment, the researchers set a downward channel 110 at the bottom of the housing 100 of the motor assembly, and the electric control assembly is accommodated by setting the channel 110, and the electric control assembly and the motor assembly are connected in an integrated manner. It should be noted that the electric control assembly and the motor assembly are connected in an integrated manner, that is, there is no need to set an additional high-voltage wire harness between the electric control assembly and the motor assembly to connect, but the electric control wiring copper bar 200 of the electric control assembly is directly connected to the motor three-phase connection seat 130 of the motor assembly. Since the electric control assembly is located in the channel 110 of the housing 100 of the motor assembly, the proportion of the outer envelope space formed by the electric control assembly and the motor assembly is smaller. When the two are installed as a whole in the car, the proportion of space occupied by the two inside the car is smaller than that of the existing solution.
[0033] In one embodiment, a junction box 120 is provided on the side of the shell 100, the motor assembly includes a motor three-phase connection seat 130, and the electric control assembly includes an electric control wiring copper bus 200. The motor three-phase connection seat 130 is connected to the electric control wiring copper bus and is arranged in the junction box 120.
[0034] In this embodiment, see Figure 2 As shown, a junction box 120 is provided on the side of the shell 100, wherein the junction box 120 is used to accommodate the motor three-phase connection seat 130 of the motor assembly and the electric control wiring copper bus 200 of the electric control assembly. Since the motor three-phase connection seat 130 and the electric control wiring copper bus 200 are both high-voltage modules, the junction box 120 is provided in this study to electrically isolate and protect the two.
[0035] Furthermore, in one embodiment, bolts are provided between the motor three-phase connection base 130 and the electric control wiring copper busbar.
[0036] In this embodiment, the bolts can provide a firm mechanical connection, thereby ensuring that the contact between the motor three-phase connection socket 130 and the electric control wiring copper busbar is stable and not easily loosened due to vibration or other external forces.
[0037] In one embodiment, the junction box 120 includes an independent first cavity 121 and a second cavity 122, and the electric control assembly also includes a low-voltage wiring harness, which is arranged for the first cavity 121, and the motor three-phase connection socket 130 and the electric control wiring copper busbar are arranged in the second cavity 122.
[0038] In this embodiment, the researchers designed the junction box 120 to include an independent first cavity 121 and a second cavity 122, wherein the electric control assembly also includes a low-voltage harness, which is arranged in the first cavity 121, and the motor three-phase connection seat 130 and the electric control wiring copper bar 200 are arranged in the second cavity 122. By placing the high-voltage and low-voltage components in separate cavities, the physical isolation of the high- and low-voltage modules is effectively achieved, thereby improving the electrical safety and reliability of the system. In addition, separating the low-voltage harness from the high-voltage part avoids interference and potential failures caused by voltage differences, and ensures the stable operation of the electric control system.
[0039] Furthermore, the size of the second cavity 122 is larger than that of the first cavity 121 .
[0040] In this embodiment, the researchers made the size of the second cavity 122 larger than the size of the first cavity 121. By increasing the space of the second cavity 122, the motor three-phase connection socket 130 and the electronic control wiring copper bus 200 can be better accommodated. At the same time, the larger second cavity 122 can provide sufficient heat dissipation and operating space, thereby improving the heat dissipation effect and working efficiency of the high-voltage module.
[0041] In one embodiment, see Figure 1 and Figure 2 As shown, the junction box 120 is further provided with a cover 123 , and the cover 123 closes the junction box 120 .
[0042] In this embodiment, by adding a cover 123 on the junction box 120, not only can the electrical connection components in the junction box 120 be effectively protected from the influence of the external environment, such as dust, moisture and mechanical damage, but also the safety and sealing of the junction box 120 are further enhanced. Through the sealing effect of the cover 123, external impurities can be prevented from entering the junction box 120, ensuring the cleanliness and reliability of the electrical connection components, and avoiding electrical failures caused by environmental factors. At the same time, the cover 123 is designed to be easy to open and close, which is convenient for the inspection and maintenance of the internal components of the junction box 120.
[0043] In one embodiment, the stator assembly 400 in the motor assembly is disposed in the housing 100, and the end plates on both sides of the rotor core in the motor assembly are provided with inclined spray outlets, wherein at least one of the spray outlets is arranged in a direction toward the stator assembly 400, and the cooling oil in the motor assembly can be sprayed toward the stator assembly 400 along the spray outlet.
[0044] In this embodiment, the researchers set inclined spray nozzles on the end plates on both sides of the rotor core of the motor assembly, wherein at least one of the spray nozzles is set toward the stator assembly 400, thereby achieving directional cooling of the stator assembly 400. The design of the spray nozzle in this embodiment can ensure that the cooling oil can be effectively sprayed onto the surface of the stator assembly 400, quickly taking away the heat generated by the stator assembly 400, thereby effectively controlling its operating temperature and avoiding equipment damage or performance degradation due to overheating.
[0045] Furthermore, an oil channel hole is provided in the middle of the rotating shaft of the motor assembly, and branch channels are provided on both sides of the oil channel hole, and the branch channels are connected to the spray ports in a one-to-one correspondence.
[0046] In this embodiment, the researchers set an oil channel hole in the middle of the rotating shaft so that the cooling oil can be effectively circulated inside the motor assembly, thereby improving the cooling of the inside of the motor assembly. The branch channels on both sides of the oil channel hole are directly connected to the spray port, so that the cooling oil can flow along a pre-set path and spray directly onto the stator assembly 400. This structural design can not only ensure that the cooling oil is evenly distributed around the stator assembly 400 to achieve more uniform and effective cooling, but also reduce the resistance and loss that the cooling oil may encounter during the flow process. Through this cooling method, the operating temperature of the stator assembly 400 can be better controlled to avoid performance degradation or component damage due to local overheating, thereby further improving the overall performance and reliability of the motor assembly.
[0047] In one embodiment, the stator assembly 400 and the terminal box 120 are located on the same side of the housing 100 , and the stator assembly 400 is located on the upper side of the terminal box 120 .
[0048] In this embodiment, the researchers placed the stator assembly 400 and the terminal box 120 on the same side. This arrangement makes the stator assembly 400 and the terminal box 120 more compact in spatial layout, thereby helping to reduce the overall size of the motor assembly. In addition, the stator assembly 400 is located on the upper side of the terminal box 120, which helps to utilize the gravity effect, making it easier for the cooling oil to flow from the stator assembly 400 to the outside of the terminal box 120, thereby absorbing the heat radiated from the outside of the terminal box 120.
[0049] The present application also proposes a car. When the above-mentioned electric drive system is installed in the car, since the motor assembly and the electronic control assembly adopt an integrated design scheme, the overall outer envelope space composed of the motor assembly and the electronic control assembly is smaller than the existing scheme, thereby making the passenger compartment of the car have a larger space occupancy.
[0050] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0051] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.
Claims
1. An electric drive system, characterized in that: The electric drive system comprises: A motor assembly, the motor assembly comprising a housing (100), the bottom of the housing (100) being provided with a channel (110) facing downwards; An electric control assembly, the electric control assembly being arranged in the channel (110), the electric control assembly being integrally connected with the motor assembly; An end cover (300), wherein the end cover (300) is arranged at the bottom of the shell (100).
2. The electric drive system according to claim 1, characterized in that: A junction box (120) is provided on the side of the housing (100), the motor assembly comprises a motor three-phase connection seat (130), the electric control assembly comprises an electric control connection copper busbar (200), and the motor three-phase connection seat (130) is connected to the electric control connection copper busbar and is provided in the junction box (120).
3. The electric drive system according to claim 2, characterized in that: Bolts are provided between the motor three-phase connection seat (130) and the electric control wiring copper bar.
4. The electric drive system according to claim 2, characterized in that: The junction box (120) comprises an independent first cavity (121) and a second cavity (122), the electric control assembly further comprises a low-voltage wiring harness, the low-voltage wiring harness is arranged for the first cavity (121), and the motor three-phase connection socket (130) and the electric control wiring copper busbar are arranged in the second cavity (122).
5. The electric drive system according to claim 4, characterized in that: The size of the second cavity (122) is greater than the size of the first cavity (121).
6. The electric drive system according to claim 2, characterized in that: The junction box (120) is also provided with a cover (123), and the cover (123) closes the junction box (120).
7. The electric drive system according to claim 2, characterized in that: The stator assembly (400) in the motor assembly is arranged on the housing (100), and end plates on both sides of the rotor core in the motor assembly are provided with inclined spraying ports, wherein at least one of the spraying ports is arranged in a direction facing the stator assembly (400), and cooling oil in the motor assembly can be sprayed toward the stator assembly (400) along the spraying ports.
8. The electric drive system according to claim 7, characterized in that: An oil passage hole is arranged in the middle of the rotating shaft of the motor assembly, and branch passages are arranged on both sides of the oil passage hole, and the branch passages are communicated with the spray ports in a one-to-one correspondence.
9. The electric drive system according to claim 7, characterized in that: The stator assembly (400) and the terminal box (120) are located on the same side of the housing (100), and the stator assembly (400) is located on the upper side of the terminal box (120).
10. An automobile, characterized in that: The automobile comprises the electric drive system as claimed in any one of claims 1 to 9.