Electric drive system and vehicle

Abstract

The utility model discloses a kind of electric drive system and vehicle, it is related to electric vehicle technical field, wherein, electric drive system includes electric control module and motor module, electric control module includes electric control shell and electric control component, electric control cavity is formed in electric control shell, electric control cavity is used to accommodate electric control component, electric control component includes circuit board;Motor module includes motor shell and motor, motor cavity is formed in motor shell, motor cavity is used to accommodate motor, low-voltage component is installed in motor cavity;Electric control shell is installed on motor shell and has junction, one end of connection wire harness is connected with low-voltage component, after passing through junction, other end is connected with circuit board.The technical scheme provided by the utility model avoids the electromagnetic interference problem when low-voltage wire harness is connected in electric drive system, and improves the use safety of vehicle.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, and in particular to an electric drive system and vehicle. Background Technology

[0002] In a split-type dual-motor drive system, the electronic control unit (ECU) is typically separated from the two motors by a housing. The position sensor and temperature sensor, which are connected to the two motors, serve as key signal acquisition units, and their low-voltage wiring harnesses need to be electrically connected to the ECU.

[0003] Currently, the common practice is to connect the low-voltage wiring harness and the electronic control unit via a connecting wire, with the connecting wire located outside the housing of the electric drive system. It's understandable that the housing of the electric drive system not only provides mechanical protection and sealing, but it is also a crucial electromagnetic shield. Placing the connecting wire outside the housing effectively disrupts the housing's complete electromagnetic shielding, exposing the vulnerable connecting wire to a high-intensity electromagnetic environment. In this situation, the connecting wire, affected by electromagnetic interference, acts as an antenna receiving radiated interference, directly coupling with the interference source, leading to electromagnetic crosstalk, affecting its EMC performance, and ultimately impacting vehicle safety. Utility Model Content

[0004] The main purpose of this invention is to propose an electric drive system and vehicle that aims to avoid electromagnetic interference problems when connecting low-voltage wiring harnesses in the electric drive system and improve the safety of vehicle use.

[0005] To achieve the above objectives, the electric drive system proposed in this utility model includes: An electronic control module includes an electronic control housing and an electronic control assembly. An electronic control cavity is formed within the electronic control housing to house the electronic control assembly, which includes a circuit board. A motor module includes a motor housing and a motor. A motor cavity is formed inside the motor housing to accommodate the motor. Low-voltage components are installed inside the motor cavity. The electrical control housing is mounted on the motor housing and has a connection point. One end of the connecting wire harness is connected to the low-voltage component, and after passing through the connection point, the other end is connected to the circuit board.

[0006] In one embodiment, the connection between the electronic control housing and the motor housing is provided with a through hole, and an electrical connector is installed at the through hole; the circuit board is connected to the electrical connector via a first connecting harness, and the low-voltage component has a second connecting harness, which is connected to the electrical connector, so that the circuit board and the low-voltage component are electrically connected.

[0007] In one embodiment, the outer periphery of the electrical connector is provided with a sealing element, which is in a sealing engagement with the connecting hole.

[0008] In one embodiment, the second connection harness includes a first sub-harness and a second sub-harness disposed within the motor cavity, wherein one end of the first sub-harness away from the second sub-harness is electrically connected to the electrical connector, and one end of the second sub-harness away from the first sub-harness is electrically connected to the low-voltage component.

[0009] In one embodiment, the second sub-wiring harness is provided in multiple configurations; the low-voltage components include a position sensor and a temperature sensor, one second sub-wiring harness is used for electrical connection to the position sensor, and another second sub-wiring harness is used for electrical connection to the temperature sensor; and / or The motor includes a drive motor and a generator, and a second sub-wiring harness is used to electrically connect to the low-voltage components on the drive motor and the generator.

[0010] In one embodiment, the first sub-wire harness is provided, the first sub-wire harness includes a first end connected to an electrical connector, a second end connected to a second sub-wire harness, and a main body segment located between the first end and the second end. The first end is provided with a plurality of first connectors corresponding one-to-one with a plurality of contacts of the electrical connector, and the second end is provided with a plurality of second connectors corresponding one-to-one with a plurality of second sub-wire harnesses.

[0011] In one embodiment, one of the first sub-wire harness and the second sub-wire harness is provided with a female connector and the other is provided with a male connector, wherein the female connector is plugged into the male connector.

[0012] In one embodiment, one of the female connector and the male connector is provided with a guide rib, and the other is provided with a guide groove. The male connector is inserted into the female connector, and the guide rib is embedded in the guide groove.

[0013] In one embodiment, a first wire buckle is fixed inside the motor housing, and the main body segment is engaged in the first wire buckle; and / or A second wire buckle is fixed inside the motor housing, and the second sub-wire harness is snapped into the second wire buckle.

[0014] This utility model also proposes a vehicle including the aforementioned electric drive system.

[0015] The technical solution of this utility model involves setting an electronic control module and a motor module in an electric drive system. The electronic control module includes an electronic control housing and an electronic control component. An electronic control cavity is formed within the electronic control housing to house the electronic control component, which includes a circuit board. The motor module includes a motor housing and a motor. A motor cavity is formed within the motor housing to house the motor, and low-voltage components are installed within the motor cavity. The electronic control housing is mounted on the motor housing and has a connection point. One end of a connecting harness is connected to the low-voltage component, passes through the connection point, and the other end is connected to the circuit board. Thus, compared to existing technologies, the connecting harness in this utility model is located inside the motor housing and the electronic control housing, thereby avoiding the connecting harness being located outside the motor housing and thus avoiding electromagnetic interference to the connecting harness. This ensures the safe and stable operation of the electric drive system and guarantees the safety and reliability of the vehicle. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of an embodiment of the electric drive system provided by this utility model after removing part of the outer casing; Figure 2 for Figure 1 A schematic diagram of the structure of an embodiment of the electrical connector in the diagram; Figure 3 for Figure 1 An exploded structural diagram of an embodiment of the male and female connectors in the diagram; Figure 4 for Figure 3 A structural diagram from another perspective.

[0018] Explanation of icon numbers: 100. Electronic control module; 110. Electronic control housing; 200, Motor module; 210, Motor housing; 211, Communicating hole; 220, Motor; 221, Drive motor; 222, Generator; 240, Motor cavity; 250, Low-voltage components; 260, Electrical connector; 261, Sealing element; 310. First sub-harness; 311. Male connector; 312. Guide groove; 313. Main body section; 320. Second sub-harness; 321. Female connector; 322. Guide rib; 331. First wire clip; 332. Second wire clip.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] In a split-type dual-motor drive system, the electronic control unit (ECU) is typically separated from the two motors by a housing. The position sensor and temperature sensor, which are connected to the two motors, serve as key signal acquisition units, and their low-voltage wiring harnesses need to be electrically connected to the ECU.

[0024] Currently, the common practice is to connect the low-voltage wiring harness and the electronic control unit via a connecting wire, with the connecting wire located outside the housing of the electric drive system. It's understandable that the housing of the electric drive system not only provides mechanical protection and sealing, but it is also a crucial electromagnetic shield. Placing the connecting wire outside the housing effectively disrupts the housing's complete electromagnetic shielding, exposing the vulnerable connecting wire to a high-intensity electromagnetic environment. In this situation, the connecting wire, affected by electromagnetic interference, acts as an antenna receiving radiated interference, directly coupling with the interference source, leading to electromagnetic crosstalk, affecting its EMC performance, and ultimately impacting vehicle safety.

[0025] This utility model proposes an electric drive system.

[0026] Please see Figure 1 In one embodiment of this utility model, the electric drive system includes an electronic control module 100 and a motor module 200. The electronic control module 100 includes an electronic control housing 110 and an electronic control component (not shown). An electronic control cavity (not shown) is formed inside the electronic control housing 110 to accommodate the electronic control component, which includes a circuit board (not shown). The motor module 200 includes a motor housing 210 and a motor 220. A motor cavity 240 is formed inside the motor housing 210 to accommodate the motor 220. A low-voltage component 250 is installed inside the motor cavity 240. The electronic control housing 110 is mounted on the motor housing 210 and has a connection point. One end of the connecting wire harness is connected to the low-voltage component 250, and after passing through the connection point, the other end is connected to the circuit board.

[0027] Specifically, the electric drive system includes an electronic control module 100 and a motor module 200. The electronic control components in the electronic control module 100 are the core intelligent hub of the electric drive system, responsible for converting the DC power from the vehicle's power battery into the three-phase AC power required by the motor, and realizing the dynamic control of the entire vehicle. The electronic control components include a circuit board, which is used to connect and communicate with key devices such as the vehicle controller, sensors, and power battery management system to ensure the normal operation and performance tuning of the vehicle. In one embodiment, the circuit board is configured as a low-voltage interface board. In this invention, the electronic control module 100 is mounted on the motor module 200, that is, the electronic control housing 110 is mounted on the motor housing 210.

[0028] Understandably, the circuit board inside the electronic control cavity needs to be electrically connected to the low-voltage components 250 inside the motor cavity 240. In this invention, the circuit board and the low-voltage components 250 are electrically connected via a connecting harness, which is located inside the motor housing 210 and the electronic control housing 110. This avoids the connecting harness being located outside the motor housing 210, thus preventing electromagnetic interference and ensuring vehicle safety. More specifically, one end of the connecting harness is connected to the low-voltage components 250 inside the motor housing 210, passes through the connection between the electronic control housing 110 and the motor housing 210, and the other end is connected to the circuit board.

[0029] The technical solution of this utility model is to set up an electric control module 100 and a motor module 200 in an electric drive system. The electric control module 100 includes an electric control housing 110 and an electric control component. An electric control cavity is formed inside the electric control housing 110 to accommodate the electric control component, which includes a circuit board. The motor module 200 includes a motor housing 210 and a motor 220. A motor cavity 240 is formed inside the motor housing 210 to accommodate the motor 220. A low-voltage component 250 is installed inside the motor cavity 240. The electric control housing 110 is mounted on the motor housing 210 and has a connection point. One end of the connecting wire harness is connected to the low-voltage component 250, and after passing through the connection point, the other end is connected to the circuit board. Thus, compared with the prior art, the connecting harness in this utility model is located inside the motor housing 210 and the electronic control housing 110, thereby avoiding the connecting harness being located outside the motor housing 210, and thus avoiding electromagnetic interference to the connecting harness, thereby ensuring the safe and stable operation of the electric drive system and ensuring the safety and reliability of the vehicle.

[0030] Please see Figure 1 and Figure 2 In an embodiment of this utility model, a connecting hole 211 is provided at the connection between the electronic control housing 110 and the motor housing 210. An electrical connector 260 is installed at the connecting hole 211. The circuit board is connected to the electrical connector 260 through a first connecting harness (not shown). The low-voltage component 250 has a second connecting harness (not shown), which is connected to the electrical connector 260 to make the circuit board and the low-voltage component 250 electrically connected.

[0031] Specifically, a connecting hole 211 is provided at the connection between the electronic control housing 110 and the motor housing 210. The connecting hole 211 connects the motor cavity 240 and the electronic control cavity, and an electrical connector 260 is installed at the connecting hole 211. Understandably, the motor 220 generates a large amount of heat during operation. To ensure the normal operation of the motor 220, coolant circulates within the motor cavity 240. To prevent coolant from entering the electronic control cavity, the connecting hole 211 needs to be sealed, i.e., the electrical connector 260 seals the connecting hole 211. Understandably, the electrical connector 260 has two opposing sides facing the electronic control cavity and the motor cavity 240, and each opposing side of the electrical connector 260 has an electrical connection port, which is electrically connected to each other. The circuit board is connected to one electrical connection port of the electrical connector 260 via a first connecting wire harness. The low-voltage component 250 has a second connecting wire harness, which is connected to one electrical connection port of the electrical connector 260, thereby realizing the electrical connection between the circuit board and the low-voltage component 250. In one embodiment, the electrical connection is configured as a plurality of pins.

[0032] Please see Figure 2 In an embodiment of this utility model, a sealing element 261 is provided on the outer periphery of the electrical connector 260, and the sealing element 261 is in a sealing fit with the connecting hole 211. Specifically, in one embodiment, the sealing element 261 is provided on the outer periphery of the electrical connector 260, and the outer peripheral wall of the sealing element 261 is in sealing contact with the hole wall of the connecting hole 211, thereby achieving a seal for the connecting hole 211. In one embodiment, the sealing element 261 is configured as a sealing ring, and the electrical connector 260 and the sealing ring are integrally formed by injection molding. Of course, in other embodiments, the electrical connector 260 and the sealing ring can also be separate structures. In other embodiments, the electrical connector 260 can also be sealed with the connecting hole 211 by sealant.

[0033] Please see Figure 1 In an embodiment of this utility model, the second connecting harness includes a first sub-harness 310 and a second sub-harness 320 electrically connected within the motor cavity 240. The end of the first sub-harness 310 away from the second sub-harness 320 is electrically connected to the electrical connector 260, and the end of the second sub-harness 320 away from the first sub-harness 310 is electrically connected to the low-voltage component 250.

[0034] Understandably, the second connecting harness is located inside the motor cavity 240, which houses a number of component structures. The connection between the electrical connector 260 and the low-voltage component 250 may need to avoid other component structures. To facilitate the electrical connection between the two, the second connecting harness is configured to include a first sub-harness 310 and a second sub-harness 320 for electrical connection. One end of the first sub-harness 310 is electrically connected to the electrical connector 260, and one end of the second sub-harness 320 is electrically connected to the low-voltage component 250. The first sub-harness 310 and the second sub-harness 320 are then connected together. This improves the convenience of the electrical connection between the electrical connector 260 and the low-voltage component 250.

[0035] Please see Figure 1 In embodiments of this utility model, multiple second sub-wiring harnesses 320 are provided; the low-voltage component 250 includes a position sensor and a temperature sensor, one second sub-wiring harness 320 is used for electrical connection to the position sensor, and another second sub-wiring harness 320 is used for electrical connection to the temperature sensor; and / or The motor 220 includes a drive motor 221 and a generator 222. A second sub-wiring harness 320 is used for electrical connection with low-voltage components 250 on the drive motor 221 and a second sub-wiring harness 320 is used for electrical connection with low-voltage components 250 on the generator 222.

[0036] In one embodiment, low-voltage components 250 are installed within the motor cavity 240, including position sensors, temperature sensors, vibration sensors, etc. In this invention, the low-voltage components 250 including a position sensor (not shown) and a temperature sensor (not shown) are used as an example for description. To achieve electrical connection of multiple low-voltage components 250, multiple second sub-wiring harnesses 320 are provided, wherein one second sub-wiring harness 320 is used for electrical connection with the position sensor, and another second sub-wiring harness 320 is used for electrical connection with the temperature sensor.

[0037] In one embodiment, the motor module 200 is configured as a dual-motor system, that is, motor 220 includes a drive motor 221 and a generator 222. Correspondingly, motor cavity 240 includes a first cavity (not shown) for accommodating the drive motor 221 and a second cavity (not shown) for accommodating the generator 222. Low-voltage components 250 are respectively provided in the drive motor 221 and the generator 222. To achieve electrical connection of the low-voltage components 250 in each motor, multiple second sub-wiring harnesses 320 are provided, wherein one second sub-wiring harness 320 is used for electrical connection with the low-voltage components 250 on the drive motor 221, and another second sub-wiring harness 320 is used for electrical connection with the low-voltage components 250 on the generator 222.

[0038] Furthermore, the low-voltage components 250 include position sensors and temperature sensors, etc. The drive motor 221 and the generator 222 are respectively connected to a position sensor and a temperature sensor, thus resulting in a large number of low-voltage components 250 in the motor cavity 240, and the distribution of multiple low-voltage components 250 is not concentrated. To facilitate the electrical connection between the electrical connector 260 and each low-voltage component 250, the wiring harness portion in the motor cavity 240 is set as a first sub-wiring harness 310 and a second sub-wiring harness 320 for electrical connection. The first sub-wiring harness 310 is used for electrical connection with the electrical connector 260, and the second sub-wiring harness 320 is used for electrical connection with the low-voltage components 250, thereby improving the ease of connection between the electrical connector 260 and the low-voltage components 250.

[0039] Understandably, the motor cavity 240 contains several low-voltage components 250, and correspondingly, several second sub-wire harnesses 320 are provided, meaning that each low-voltage component 250 is electrically connected to a second sub-wire harness 320. Understandably, the end of the first sub-wire harness 310 connected to the second sub-wire harness 320 has a connector, and the number of connectors for the first sub-wire harness 310 is equal to the number of connectors for the second sub-wire harness 320, thus ensuring a one-to-one correspondence between each second sub-wire harness 320 and a connector.

[0040] Please see Figure 1 , Figure 3 and Figure 4 In an embodiment of this utility model, one of the first sub-wire harness 310 and the second sub-wire harness 320 is provided with a female connector 321, and the other is provided with a male connector 311. The female connector 321 and the male connector 311 are plugged into each other. Specifically, in the scheme shown in the figures of this utility model, the first sub-wire harness 310 is provided with a male connector 311, and the second sub-wire harness 320 is provided with a female connector 321. When the first sub-wire harness 310 and the second sub-wire harness 320 are electrically connected, the male connector 311 is simply inserted into the female connector 321. Of course, in other embodiments, the first sub-wire harness 310 may be provided with a female connector 321, and the second sub-wire harness 320 may be provided with a male connector 311. In this way, the electrical connection of the first sub-wire harness 310 and the second sub-wire harness 320 is achieved by plugging in the male connector 311 and the female connector 321, which improves the convenience and reliability of the electrical connection between the first sub-wire harness 310 and the second sub-wire harness 320. Of course, in other embodiments, the electrical connection between the first sub-wire harness 310 and the second sub-wire harness 320 can also be achieved by means of conductive adhesive bonding or other methods.

[0041] In an embodiment of this utility model, a first sub-wire harness 310 is provided, which includes a first end (not shown) connected to an electrical connector 260, a second end (not shown) connected to a second sub-wire harness 320, and a main body segment 313 located between the first end and the second end. The first end is provided with a plurality of first connectors (not shown) for corresponding one-to-one with a plurality of contacts of the electrical connector 260, and the second end is provided with a plurality of second connectors (not shown) for corresponding one-to-one with a plurality of second sub-wire harnesses 320.

[0042] Understandably, multiple low-voltage components 250 are installed within the motor housing 210. Each low-voltage component 250 is connected to a second sub-wire harness 320. Each second sub-wire harness 320 needs to connect to a connector of a first sub-wire harness 310; that is, the first sub-wire harness 310 needs to include multiple connectors. More specifically, the first end of the first sub-wire harness 310 has multiple first connectors corresponding one-to-one with multiple contacts of the electrical connector 260, and the second end of the first sub-wire harness 310 has multiple second connectors corresponding one-to-one with multiple second sub-wire harnesses 320. In one embodiment, the electrical connector 260 is configured with multiple pins, the number of first connectors is the same as the number of pins of the electrical connector 260, and the number of second connectors is the same as the number of second sub-wire harnesses 320. Understandably, a first connector needs to be connected to a second connector through a connecting segment. In this invention, multiple connecting segments are formed into a main segment by means of wire harness winding tube, braided mesh tube, heat shrink tubing, or tape winding, that is, the first sub-wire harness 310 is set as one, which is conducive to wire management and avoids wire harness mess.

[0043] Please see Figure 3 and Figure 4 In an embodiment of this utility model, one of the female connector 321 and the male connector 311 is provided with a guide rib 322, and the other is provided with a guide groove 312. The male connector 311 is inserted into the female connector 321, and the guide rib 322 is embedded in the guide groove 312. It can be understood that, to facilitate the insertion of the female connector 321 and the male connector 311, in the solution shown in the figures of this utility model, the male connector 311 is provided with a guide groove 312, and the female connector 321 is provided with a guide rib 322. The extending direction of the guide rib 322 and the guide groove 312 is consistent with the insertion direction of the male connector 311 and the female connector 321. When the male connector 311 and the female connector 321 are inserted, the guide rib 322 is embedded in the guide groove 312, and the guide rib 322 can move relative to the guide groove 312. This provides guidance for the insertion of the male connector 311 and the female connector 321, improving the accuracy of the insertion direction and thus increasing insertion efficiency. Of course, in other embodiments, the guide rib 322 can be provided on the male connector 311, and the guide groove 312 can be provided on the female connector 321.

[0044] Please see Figure 1 In an embodiment of this utility model, a first wire buckle 331 is fixed inside the motor housing 210, and the main body segment 313 of the multi-sub-wire is snapped in the first wire buckle 331; and / or, a second wire buckle 332 is fixed inside the motor housing 210, and the second sub-wire harness 320 is snapped in the second wire buckle 332.

[0045] Understandably, to further optimize the wiring harness and avoid its disordered arrangement, in one embodiment, a first wire clip 331 is fixed inside the motor housing 210, and the main body segments 313 of the multiple sub-wires are bundled together and secured in the first wire clip 331. In one embodiment, multiple first wire clips 331 are provided, and the multiple first wire clips 331 are arranged at intervals.

[0046] In one embodiment, a second wire clip 332 is fixed inside the motor housing 210, and a second sub-wire harness 320 is clipped into the second wire clip 332. The second sub-wire harness 320 includes a first resolver wire electrically connected to a first position sensor, a second resolver wire electrically connected to a second position sensor, a first temperature sensing wire electrically connected to a first temperature sensor, and a second temperature sensing wire electrically connected to a second temperature sensor. In one embodiment, multiple second wire clips 332 are provided, and the multiple second wire clips 332 are arranged at intervals.

[0047] Thus, in the electric drive system, the electrical connection formed between the connecting harnesses is: circuit board - first connecting harness - electrical connector 260 - second connecting harness (first sub-harness 310 - second sub-harness 320) - low-voltage component 250, thereby realizing the electrical connection between the circuit board and the low-voltage component 250.

[0048] This utility model also proposes a vehicle that includes an electric drive system. The specific structure of the electric drive system is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0049] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. An electric drive system, characterized in that, include: An electronic control module includes an electronic control housing and an electronic control assembly. An electronic control cavity is formed within the electronic control housing to house the electronic control assembly, which includes a circuit board. A motor module includes a motor housing and a motor. A motor cavity is formed inside the motor housing to accommodate the motor. Low-voltage components are installed inside the motor cavity. The electrical control housing is mounted on the motor housing and has a connection point. One end of the connecting wire harness is connected to the low-voltage component, and after passing through the connection point, the other end is connected to the circuit board.

2. The electric drive system as described in claim 1, characterized in that, The connection between the electrical control housing and the motor housing is provided with a through hole, and an electrical connector is installed at the through hole; the circuit board is connected to the electrical connector through a first connecting wire harness, and the low-voltage component has a second connecting wire harness, which is connected to the electrical connector, so that the circuit board and the low-voltage component are electrically connected.

3. The electric drive system as described in claim 2, characterized in that, The outer periphery of the electrical connector is provided with a sealing element, which is sealed and engaged with the connecting hole.

4. The electric drive system as described in claim 2, characterized in that, The second connection harness includes a first sub-harness and a second sub-harness disposed within the motor cavity, wherein the end of the first sub-harness away from the second sub-harness is electrically connected to the electrical connector, and the end of the second sub-harness away from the first sub-harness is electrically connected to the low-voltage component.

5. The electric drive system as described in claim 4, characterized in that, The second sub-harness is provided in multiple configurations; the low-voltage components include a position sensor and a temperature sensor, one second sub-harness is used for electrical connection to the position sensor, and another second sub-harness is used for electrical connection to the temperature sensor; and / or The motor includes a drive motor and a generator, and a second sub-wiring harness is used to electrically connect to the low-voltage components on the drive motor and the generator.

6. The electric drive system as described in claim 5, characterized in that, The first sub-wire harness is provided, and the first sub-wire harness includes a first end connected to an electrical connector, a second end connected to a second sub-wire harness, and a main body segment located between the first end and the second end. The first end is provided with a plurality of first connectors that correspond one-to-one with a plurality of contacts of the electrical connector, and the second end is provided with a plurality of second connectors that correspond one-to-one with a plurality of second sub-wire harnesses.

7. The electric drive system as described in claim 4, characterized in that, One of the first sub-wire harness and the second sub-wire harness is provided with a female connector plug and the other is provided with a male connector plug, and the female connector plug is connected to the male connector plug.

8. The electric drive system as described in claim 7, characterized in that, One of the female connector and the male connector is provided with a guide rib, and the other is provided with a guide groove. The male connector is inserted into the female connector, and the guide rib is embedded in the guide groove.

9. The electric drive system as described in claim 6, characterized in that, A first wire buckle is fixed inside the motor housing, and the main body segment is engaged in the first wire buckle; and / or A second wire buckle is fixed inside the motor housing, and the second sub-wire harness is snapped into the second wire buckle.

10. A vehicle, characterized in that, Includes the electric drive system as described in any one of claims 1 to 9.

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