Integrated New Energy Commercial Vehicle Electric Drive Assembly System

Abstract

The present application discloses an integrated electric drive assembly system for new energy commercial vehicles, which relates to the technical field of electric vehicles. It includes an electronic control unit, and the inner axial end face of the electronic control unit is rigidly connected to one axial end face of the motor unit; a transmission unit, and the inner axial end face of the transmission unit is rigidly connected to the other axial end face of the motor unit; wherein, the electronic control unit is used to control and manage the motor unit and the transmission unit; the motor unit is used to provide a power source for the electric drive assembly system; the transmission unit is used to change the speed and torque of the motor unit. By adopting the integrated electric drive assembly system for new energy commercial vehicles provided by the embodiments of the present application, compared with the prior art, it greatly saves space, makes the entire drive system more compact, improves the space utilization rate of the vehicle, reduces the maintenance cost, reduces the energy loss, effectively reduces the system temperature, and improves the stability and reliability of the system.

Description

Technical Field

[0001] This application belongs to the technical field of electric vehicles, and particularly relates to an integrated new energy commercial vehicle electric drive assembly system. Background Art

[0002] With the rapid development of the new energy commercial vehicle market, the technical requirements for the vehicle power system are constantly increasing, and the traditional electric drive layout has been difficult to meet the development needs. The current new energy commercial vehicle power system consists of multiple components, including a power source, an electronic control system, a motor, a DC bus, an AC line, a cooling unit, a gearbox, etc. These components are arranged independently, forming a relatively scattered and complex structure. However, with the growing demands for electric commercial vehicles in terms of performance, efficiency, integration, and lightweight, the traditional component layout method shows many limitations, especially in cost control, layout space optimization, and system integration.

[0003] On the one hand, although the existing split electronic control system and motor layout methods can ensure the stability of the system in some cases, when facing the demand for high-power motor drive, they must cope with the challenges of large current and high heat dissipation. Traditional electrical connection methods, such as single-wire or double-wire layout, not only require increasing the cable carrying capacity but also may lead to long and heavy wire harnesses, thereby affecting the overall performance and efficiency of the vehicle. On the other hand, with the increase in the power demand of electric commercial vehicles, the volume and weight of the battery, motor, and electronic control system are also constantly increasing. How to efficiently integrate these components in a limited space has become a key problem in the design.

[0004] In this context, the design of an integrated powertrain system is particularly important. The core goal of the integrated design is to achieve higher integration and smaller volume by optimizing the layout of the electronic control system, motor, and other key components, while improving the overall efficiency and reliability. Through reasonable integration, a closer connection can be established between the battery, motor, and electronic control system, thereby reducing redundant wire harnesses and components and improving the heat dissipation performance of the system. In addition, the integrated design can also effectively reduce production costs, reduce assembly difficulties, and improve the production efficiency of the vehicle.

[0005] However, the research and development of the integrated powertrain system also face a series of technical challenges. First, the integrated system needs to achieve an accurate balance in terms of structure, function, and thermal management. Second, the reliability and safety of the system must be fully guaranteed. Especially in a high-power and high-voltage environment, how to ensure the electrical safety and the effectiveness of thermal management between the battery, electronic control system, and motor is still a key problem to be overcome in the research and development process. Finally, the integrated design also needs to consider multiple factors such as cost, production process, and maintainability to ensure that the final design is not only leading in performance but also has good market competitiveness.

[0006] Therefore, how to achieve efficient integration in the power system of new energy commercial vehicles and design an integrated powertrain system that meets high performance requirements while being lightweight and efficient has become an important issue that needs to be urgently addressed in the current new energy vehicle field. Summary of the Invention

[0007] The purpose of this application is to provide an integrated new energy commercial vehicle electric drive assembly system, which achieves lightweight vehicle layout, centralized cooling and space layout optimization through the integrated design of the electronic control unit, motor unit and gearbox unit.

[0008] To achieve the above objectives, the present invention provides an integrated electric drive assembly system for new energy commercial vehicles, including:

[0009] An electronic control unit, wherein the inner axial end face of the electronic control unit is rigidly connected to one axial end face of the motor unit; a gearbox unit, wherein the inner axial end face of the gearbox unit is rigidly connected to the other axial end face of the motor unit;

[0010] Among them, the electronic control unit is used to control and manage the motor unit and the transmission unit; the motor unit is used to provide a power source for the electric drive assembly system; and the transmission unit is used to change the speed and torque of the motor unit.

[0011] The above system according to the embodiment of the present application may also have the following additional technical features:

[0012] Furthermore, the electronic control unit includes an electronic control unit housing, a second electronic control unit cooling water nozzle is installed on the left side of the exterior of the electronic control unit housing, a second ventilation valve is installed below the second electronic control unit cooling water nozzle, and a first electronic control unit cooling water nozzle and a first ventilation valve are symmetrically installed on the right side and the left side of the exterior of the electronic control unit housing;

[0013] Above the first electronic control unit cooling water nozzle, the second motor unit cooling water nozzle and the first motor unit cooling water nozzle are installed in sequence from bottom to top, and a cooling water pipe is connected between the first electronic control unit cooling water nozzle and the second motor unit cooling water nozzle.

[0014] Furthermore, a DC module housing is installed on the upper side of the exterior of the electronic control unit housing. A DC module cover plate is installed above the DC module housing. A sealing groove is provided between the DC module housing and the DC module cover plate, and a sealing ring is provided in the sealing groove. A DC module is installed inside the DC module housing. A second DC pressure plate bracket and a third DC pressure plate bracket are respectively installed on both sides of the DC module housing. The second DC pressure plate bracket and the third DC pressure plate bracket are symmetrically arranged and fixed on the electronic control unit housing. Perpendicular to the second DC pressure plate bracket and the third DC pressure plate bracket, a first DC pressure plate bracket is also provided. The first DC pressure plate bracket is fixed through the second DC pressure plate bracket and the third DC pressure plate bracket. A first DC pressure plate and a second DC pressure plate are installed above the first DC pressure plate bracket. The first DC pressure plate and the second DC pressure plate are installed in a butt-jointed manner to form a circular wire groove for the DC high-voltage line.

[0015] Furthermore, the electronic control unit includes an electronic control unit housing. A sealing groove is provided between the electronic control unit housing and the DC module housing, and a sealing ring is provided in the sealing groove. The interior of the electronic control unit housing is divided into three structural parts. The first part includes an insulation capacitor module. The second part is further divided into an upper and a lower layer structure, including the upper interior of the electronic control and the lower interior of the electronic control. The third part includes an AC module.

[0016] Among them, a drive module is installed in the lower interior of the electronic control. An insulation capacitor module is installed between the drive module and the DC module through a bolt group. The insulation capacitor module is used to ensure the electrical safety of the system.

[0017] Furthermore, a discharge resistor is installed between the insulation capacitor module and the DC module. The discharge resistor is used to release the charge.

[0018] Furthermore, a control unit is installed in the upper interior of the electronic control. The control unit is installed above the drive module through a control unit bracket. The drive module is installed between the insulation capacitor module and the AC module through a bolt group.

[0019] A low-voltage unit is also installed below the second breather valve. The low-voltage unit is used to supply power to the control unit. The low-voltage unit is connected to the control unit by a wire harness.

[0020] Furthermore, the electronic control unit housing is provided with DC module housing mounting holes. Symmetrically arranged DC busbars are also installed inside the DC module housing.

[0021] Furthermore, the electronic control unit housing is provided with an AC module mounting seat. The AC module is installed on the AC module mounting seat. An AC module cover plate is also installed at the bottom of the electronic control unit housing. A sealing groove is provided between the electronic control unit housing and the AC module cover plate, and a sealing ring is provided in the sealing groove.

[0022] Further, a first AC busbar, a second AC busbar, and a third AC busbar are provided on the communication module, and the drive module is connected to the first AC busbar, the second AC busbar, and the third AC busbar through a bolt group.

[0023] Further, an ECU housing cover plate is also provided on the ECU housing, and a sealing groove is provided between the ECU housing and the ECU housing cover plate, and a sealing ring is provided in the sealing groove.

[0024] By adopting the integrated new energy commercial vehicle electric drive assembly system provided by the embodiment of the present application, compared with the prior art, the following beneficial technical effects are achieved:

[0025] In the embodiment of the present application, by integrating the ECU, the motor unit, and the gearbox unit together, the space is greatly saved, making the entire drive system more compact and improving the space utilization rate of the vehicle; the modular design enables each unit to be independently disassembled and replaced, reducing the maintenance cost and facilitating the technical upgrade of the system to adapt to the changing market demands; since the ECU precisely controls and manages the motor unit and the gearbox unit, the power transmission is more efficient and the energy loss is reduced.

[0026] The ECU and the motor unit in the embodiment of the present application are both equipped with cooling water nozzles and breather valves. Through the cooling water circulation and gas exchange, the system temperature is effectively reduced, and the stability and reliability of the system are improved; a sealing groove and a sealing ring are provided on the ECU housing to ensure the sealing between each module, prevent electrical leakage and moisture intrusion, and improve the safety and durability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shows the assembly schematic diagram of the integrated new energy commercial vehicle electric drive assembly system according to the embodiment of the present application;

[0028] Figure 2 Shows the schematic diagram of the ECU of the integrated new energy commercial vehicle electric drive assembly system according to the embodiment of the present application;

[0029] Figure 3 Shows the upper-layer layout schematic diagram of the interior of the ECU of the integrated new energy commercial vehicle electric drive assembly system according to the embodiment of the present application;

[0030] Figure 4 Shows the lower-layer layout schematic diagram of the interior of the ECU of the integrated new energy commercial vehicle electric drive assembly system according to the embodiment of the present application.

[0031] Description of the reference numerals: 101, electronic control unit; 201, motor unit; 301, transmission unit; 102, DC module cover plate; 103, DC module housing; 104, first DC pressure plate; 105, second DC pressure plate; 106, first DC pressure plate bracket; 107, second DC pressure plate bracket; 108, third DC pressure plate bracket; 109, cooling water pipe; 110, first cooling water nozzle of the electronic control unit; 111, first breather valve; 112, second cooling water nozzle of the electronic control unit; 113, second breather valve; 114, low-voltage unit; 115, electronic control unit housing cover plate; 116, AC module cover plate;

[0032] 117, DC module; 118, DC copper bar; 119, safety capacitor module; 120, discharge resistor; 121, control unit; 122, control unit bracket; 123, first AC copper bar; 124, second AC copper bar; 125, third AC copper bar; 126, AC module;

[0033] 127, drive module; 128, electronic control unit housing; 202, first cooling water nozzle of the motor unit; 203, second cooling water nozzle of the motor unit. Detailed implementation manners

[0034] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of convenience of description, only the parts related to the present application rather than all the structures are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0035] The terms "including" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. Mentioning "embodiment" in the present application means that the specific features, structures, or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0036] As Figure 1 shown, the embodiment of the present application provides an integrated new energy commercial vehicle electric drive assembly system, including:

[0037] The electronic control unit 101, whose inner axial end face is rigidly connected to one axial end face of the motor unit 201, is used to control and manage the motor unit 201 and the transmission unit 301.

[0038] The motor unit 201, which is located between the electronic control unit 101 and the transmission unit 301, and the electronic control unit 101 and the transmission unit 301 are respectively rigidly connected to its two axial end faces, provides the power source for the electric drive assembly system.

[0039] The transmission unit 301, whose inner axial end face is rigidly connected to the other axial end face of the motor unit 201, is used to change the speed and torque of the motor unit 201.

[0040] Specifically, the electronic control unit 101, as the "brain" of the system, is responsible for receiving instructions from the driver or other sensors (not shown in the figure), then processing these instructions, and finally adjusting the vehicle speed and torque by controlling the motor unit 201 and the transmission unit 301.

[0041] The motor unit 201, as the power source of the system, converts electrical energy into mechanical energy to drive the vehicle forward. According to specific application scenarios, the motor unit 201 may be a DC motor, an AC motor, a permanent magnet synchronous motor, etc., and the embodiments of the present application do not further limit this.

[0042] The main function of the transmission unit 301 is to change the speed and torque of the motor unit 201 to adapt to different driving conditions and the needs of the driver.

[0043] This system integrates the electronic control unit 101, the motor unit 201 and the transmission unit 301 to form a compact and efficient whole. This integrated design not only reduces the complexity and cost of the system, but also improves the reliability and performance of the system. Due to the high efficiency of the motor unit 201, this system can provide strong power output for new energy commercial vehicles. At the same time, the flexible adjustment of the transmission unit 301 also ensures that the vehicle can maintain the best power performance under various driving conditions. Compared with the traditional fuel drive system, this system has lower emissions and higher energy efficiency. It helps to reduce environmental pollution and energy consumption, and conforms to the concept of sustainable development.

[0044] As Figure 2 shown, the second electronic control unit cooling water nozzle 112, the first electronic control unit cooling water nozzle 110, the second breather valve 113 and the first breather valve 111 are respectively installed on the left and right sides outside the electronic control unit housing... This symmetric design helps to ensure that the electronic control unit 101 can dissipate heat evenly during operation and prevent excessive internal pressure.

[0045] Above the cooling water nozzle 110 of the first electronic control unit, the cooling water nozzle 203 of the second motor unit and the cooling water nozzle 202 of the first motor unit are installed in sequence from bottom to top. This layout indicates that the cooling water first flows through the electronic control unit 101 and then flows to the motor unit 201, which helps to achieve the coordinated cooling of the two units. The cooling water nozzle 110 of the first electronic control unit is connected to the cooling water nozzle 203 of the second motor unit through the cooling water pipe 109. This ensures that the coolant can circulate between the electronic control unit 101 and the motor unit 201, thereby effectively removing heat.

[0046] Through the coordinated cooling design of the electronic control unit 101 and the motor unit 201 in the embodiments of the present application, the cooling efficiency of the entire electric drive assembly system can be significantly improved. This helps to ensure the stable operation of the system in a high-temperature environment and extend its service life. The symmetrical layout of the cooling water nozzle and the breather valve not only improves the cooling effect but also facilitates daily maintenance and inspection. Maintenance personnel can easily access these components for necessary cleaning and replacement work. Through effective cooling and breather design, the risk of overheating of the electronic control unit 101 and the motor unit 201 can be reduced, thereby ensuring the safety of the entire electric drive assembly system.

[0047] The electronic control unit housing 128 in the embodiments of the present application serves as the carrier of the entire electronic control unit 101, providing protection and support; the DC module housing 103 is fixed to the upper outer side of the electronic control unit housing 128 through a bolt group for accommodating and protecting the DC module 117. The electronic control unit housing 128 is provided with DC module housing mounting holes, which means that the DC module housing 103 needs to be connected to the electronic control unit housing 128 through these mounting holes. These mounting holes provide an interface for the DC module housing 103 to connect to the electronic control unit housing 128, ensuring that the DC module housing 103 can be accurately installed on the electronic control unit housing 128 and maintain a stable connection.

[0048] On both sides of the DC module housing 103, a second DC pressure plate bracket 107 and a third DC pressure plate bracket 108 are installed respectively. These two are symmetrically arranged and fixed to the electronic control unit housing 128. Such a design not only ensures the stable fixation of the DC high-voltage line but also improves the mechanical strength of the entire electronic control unit 101.

[0049] In addition, a first DC pressure plate bracket 106 perpendicular to the second DC pressure plate bracket 107 and the third DC pressure plate bracket 108 is provided. The first DC pressure plate bracket 106 is fixed through the second DC pressure plate bracket 107 and the third DC pressure plate bracket 108. Such a bracket structure provides a more stable support for the DC high-voltage line.

[0050] Above the first DC pressure plate support 106, the first DC pressure plate 104 and the second DC pressure plate 105 are installed. These two pressure plates are installed in a facing manner to form a circular wire groove for DC high-voltage lines.

[0051] The DC module cover plate 102 is located above the DC module housing 103, providing additional protection against external factors such as dust and moisture that may affect the DC module 117, and ensuring the airtightness of the whole machine.

[0052] In the integrated new energy commercial vehicle electric drive assembly system, the electronic control unit 101 plays a crucial role. It is responsible for controlling and managing the motor unit 201 and the transmission unit 301 to ensure the stable operation of the entire system. As Figure 3 and Figure 4 shown, the electronic control unit 101 is enclosed by the electronic control unit housing 128, which plays a crucial role. It not only needs to protect the internal electronic components from external environmental interference and damage, but also needs to ensure the reliability of the connection and communication between various modules. Therefore, the design of the electronic control unit housing 128 needs to consider multiple factors, including structural strength, heat dissipation performance, sealing performance, etc.

[0053] The interior of the electronic control unit housing 128 is divided into three parts. The first part includes the safety capacitor module 119. The second part is further divided into an upper and a lower layer, including the upper interior of the electronic control and the lower interior of the electronic control. The third part includes the AC module 126.

[0054] Among them, the safety capacitor module 119 is installed in the first part. The safety capacitor module 119 is located inside the electronic control unit 101 and is installed between the drive module 127 and the DC module 117 by a bolt group. The main function of this module is to ensure the electrical safety of the system and prevent safety accidents caused by electrical faults. When an electrical fault occurs in the system, the safety capacitor module 119 can respond quickly, limit the fault current within a safe range, suppress common-mode and differential-mode interference, smooth the voltage, and prevent overcurrent, thereby protecting the entire system from damage.

[0055] The second part is further subdivided into an upper layer inside the electric control and a lower layer inside the electric control. The lower layer inside the electric control is equipped with a drive module 127. By receiving electrical energy from the safety capacitor module 119, it drives the motor unit 201 to operate. The upper layer inside the electric control is equipped with a control unit 121. The control unit 121 is responsible for receiving signals from the vehicle end, and according to these signals and preset algorithms and logics (not shown in the figure), it controls and manages the motor unit 201 and the transmission unit 301 through the drive module 127. It ensures the stable operation of the entire electric drive system and adjusts the speed and torque of the motor according to driving requirements. The control unit 121 is installed above the drive module 127 through a control unit bracket 122. This layout helps to achieve a compact structural design while ensuring good heat dissipation and electrical connection between the control unit 121 and the drive module 127;

[0056] In the embodiment of the present application, a low-voltage unit 114 is also installed below the second breather valve 113. The low-voltage unit 114 is used to realize communication between the vehicle and the control unit 121 and supply power to the control unit 121. The low-voltage interface is installed on the electric control unit housing 128 and is connected to the control unit 121 through a wire harness inside the electric control unit 101 and to the vehicle controller through a wire harness outside.

[0057] The third part includes an AC module 126. The AC module 126 is an important component in the electric drive system. The AC module 126 has functions of electric energy metering and monitoring and is responsible for the transmission of electric energy. In this embodiment, the AC module 126 is installed on an AC module mounting seat on the electric control unit housing 128. This design not only ensures the stable installation of the AC module 126 but also facilitates subsequent maintenance and replacement.

[0058] In the embodiment of the present application, a first AC busbar 123, a second AC busbar 124, and a third AC busbar 125 are also provided on the AC module 126. These busbars are important channels for electric energy transmission. They transmit electric energy from the drive module 127 to the motor unit 201, thereby driving the motor unit 201 to operate. The selection and design of the busbars are crucial for the performance and safety of the system because they need to withstand high currents and high temperatures while maintaining good electrical conductivity and mechanical strength.

[0059] This layout ensures a tight connection between the drive module 127 and these other components, reduces the length of the busbars, further compresses the assembly space, and reduces the mutual thermal influence.

[0060] Furthermore, in the embodiment of the present application, a discharge resistor 120 is installed between the safety capacitor module 119 and the DC module 117. The discharge resistor 120 plays a crucial role in the electric drive assembly system. Its main function is to release charges to ensure that the electrical energy stored in the capacitor can be safely and quickly released when the system is powered off or maintenance is required.

[0061] The discharge resistor 120 is installed between the safety capacitor module 119 and the DC module 117. This location is chosen because the main function of the safety capacitor module 119 is to ensure the electrical safety of the system, while the DC module 117 is responsible for providing a stable DC power supply. Installing the discharge resistor 120 between these two modules can ensure that when the capacitor needs to discharge, the electrical energy can be quickly and safely released through the discharge resistor 120.

[0062] The presence of the discharge resistor 120 not only improves the safety of the system but also helps to extend the service life of other components in the system. Inside the DC module housing 103, symmetrically arranged DC busbars 118 are installed. The DC busbars 118 are important components for transmitting DC electrical energy in the power system, with low resistance, high conductivity, and good heat dissipation performance. In the integrated new energy commercial vehicle electric drive assembly system, the DC busbars 118 are responsible for transmitting the electrical energy from the battery or other DC power sources to the safety capacitor module 119.

[0063] The symmetrically arranged DC busbars 118 can not only ensure the uniform distribution and transmission of electrical energy but also improve the reliability and stability of the system. At the same time, through reasonable layout and design, the heat dissipation performance of the DC busbars 118 can be optimized, reducing the temperature rise and energy consumption of the system.

[0064] Furthermore, the electronic control unit housing 128, as the core protection structure of the entire electric drive system, is designed not only considering the structural strength and durability but also paying special attention to electrical safety and sealing performance.

[0065] The use of the bolt group ensures the tight contact between the drive module 127 and the AC busbar, thereby reducing the contact resistance and improving the efficiency of electrical energy transmission. In addition, the bolt group also provides the convenience of easy disassembly and maintenance, enabling the easy replacement or repair of related components when needed.

[0066] In the integrated new energy commercial vehicle electric drive assembly system, the close integration and optimized design among various components are crucial. Through reasonable layout and precise connection, the overall performance and safety of the system can be ensured.

[0067] Furthermore, an electronic control unit housing cover plate 115 is also provided on the electronic control unit housing 128 of the embodiment of the present application. The primary function of the electronic control unit housing cover plate 115 is to protect the components inside the electronic control unit 101 from external environmental interference and damage. This includes preventing impurities such as dust, moisture, and oil stains from entering the inside of the electronic control unit 101, ensuring the airtightness of the whole machine, and preventing the internal components from loosening or being damaged due to collision or vibration.

[0068] In new energy vehicles such as electric vehicles, the electronic control unit 101 is one of the main sources of electromagnetic interference. The electronic control unit housing cover plate 115 can also effectively shield electromagnetic interference, reduce interference with other electronic devices, and improve the electromagnetic compatibility of the whole vehicle.

[0069] In the embodiment of the present application, sealing grooves are provided between the DC module cover plate 102 and the DC module housing 103, between the electronic control unit housing 128 and the DC module housing 103, between the electronic control unit housing 128 and the electronic control unit housing cover plate 115, and between the AC module cover plate 116 and the electronic control unit housing 128, and sealing rings are provided in the sealing grooves. The sealing groove is a special structure for accommodating the sealing ring. The sealing ring is usually made of an elastic material and has excellent sealing performance. The design of this structure can effectively prevent impurities such as moisture and dust from entering the inside of the assembly system from the joints between the structures, and ensure the airtightness of the whole machine.

[0070] It should be noted that in the present application, the terms "including", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0071] The embodiments of the present application have been described above with reference to the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. An integrated electric drive assembly system for new energy commercial vehicles, characterized in that, The system includes: An electronic control unit (101), the inner axial end face of the electronic control unit (101) being rigidly connected to one axial end face of the motor unit (201); a transmission unit (301), the inner axial end face of the transmission unit (301) being rigidly connected to the other axial end face of the motor unit (201); Wherein, the electronic control unit (101) is used to control and manage the motor unit (201) and the transmission unit (301); the motor unit (201) is used to provide a power source for the electric drive assembly system; the transmission unit (301) is used to change the speed and torque of the motor unit (201); the electronic control unit (101) includes an electronic control unit housing (128), a second electronic control unit cooling water nozzle (112) is installed on the left side outside the electronic control unit housing (128), a second breather valve (113) is installed below the second electronic control unit cooling water nozzle (112), and a first electronic control unit cooling water nozzle (110) and a first breather valve (111) are symmetrically installed on the right side outside the electronic control unit housing (128) with respect to the left side; Above the first electronic control unit cooling water nozzle (110), a second motor unit cooling water nozzle (203) and a first motor unit cooling water nozzle (202) are installed in sequence from bottom to top, and a cooling water pipe (109) is connected between the first electronic control unit cooling water nozzle (110) and the second motor unit cooling water nozzle (203).

2. The integrated new energy commercial vehicle electric drive assembly system according to claim 1, characterized in that A DC module housing (103) is installed on the upper side outside the electronic control unit housing (128), a DC module cover plate (102) is installed above the DC module housing (103), a sealing groove is provided between the DC module housing (103) and the DC module cover plate (102), and a sealing ring is provided in the sealing groove; a DC module (117) is installed inside the DC module housing (103), a second DC pressure plate support (107) and a third DC pressure plate support (108) are installed on both sides of the DC module housing (103) respectively, the second DC pressure plate support (107) and the third DC pressure plate support (108) are symmetrically arranged and fixed on the electronic control unit housing (128), perpendicular to the second DC pressure plate support (107) and the third DC pressure plate support (108), a first DC pressure plate support (106) is further provided, the first DC pressure plate support (106) is fixed through the second DC pressure plate support (107) and the third DC pressure plate support (108), a first DC pressure plate (104) and a second DC pressure plate (105) are installed above the first DC pressure plate support (106), and the first DC pressure plate (104) and the second DC pressure plate (105) are arranged in a butt joint manner to form a circular wire groove for DC high-voltage lines.

3. The integrated new energy commercial vehicle electric drive assembly system according to claim 2, characterized in that, The described electronic control unit (101) includes an electronic control unit housing (128). A sealing groove is provided between the electronic control unit housing (128) and the DC module housing (103), and a sealing ring is provided in the sealing groove. The interior of the electronic control unit housing (128) is divided into three structural parts. The first part includes an anti-surge capacitor module (119). The second part is further divided into upper and lower layers, including the upper interior of the electronic control and the lower interior of the electronic control. The third part includes an AC module (126). Among them, a drive module (127) is installed in the lower interior of the electronic control. An anti-surge capacitor module (119) is installed between the drive module (127) and the DC module (117) by a bolt group. The anti-surge capacitor module (119) is used to ensure the electrical safety of the system.

4. The integrated new energy commercial vehicle electric drive assembly system according to claim 3, wherein A discharge resistor (120) is installed between the anti-surge capacitor module (119) and the DC module (117). The discharge resistor (120) is used to release charges.

5. The integrated new energy commercial vehicle electric drive assembly system according to claim 3, characterized in that, A control unit (121) is installed in the upper interior of the electronic control. The control unit (121) is installed above the drive module (127) through a control unit bracket (122). The drive module (127) is installed between the anti-surge capacitor module (119) and the AC module (126) by a bolt group. A low-voltage unit (114) is also installed below the second breather valve (113). The low-voltage unit (114) is connected to the control unit (121) by a wire harness.

6. The integrated new energy commercial vehicle electric drive assembly system according to claim 2, characterized in that, Mounting holes for the DC module housing (103) are provided on the electronic control unit housing (128). Symmetrically arranged DC busbars (118) are also installed inside the DC module housing (103).

7. The integrated new energy commercial vehicle electric drive assembly system according to claim 5, characterized in that, An AC module mounting seat is provided on the electronic control unit housing (128). The AC module (126) is installed on the AC module mounting seat. An AC module cover plate (116) is also installed at the bottom of the electronic control unit housing (128). A sealing groove is provided between the electronic control unit housing (128) and the AC module cover plate (116), and a sealing ring is provided in the sealing groove.

8. The integrated new energy commercial vehicle electric drive assembly system according to claim 5, characterized in that, A first AC busbar (123), a second AC busbar (124), and a third AC busbar (125) are provided on the AC module (126). The drive module (127) is connected to the first AC busbar (123), the second AC busbar (124), and the third AC busbar (125) by a bolt group.

9. The integrated new energy commercial vehicle electric drive assembly system according to claim 1, characterized in that, An electronic control unit housing cover plate (115) is also provided on the electronic control unit housing (128). A sealing groove is provided between the electronic control unit housing (128) and the electronic control unit housing cover plate (115), and a sealing ring is provided in the sealing groove.

Images