Integrated new energy commercial vehicle electric drive assembly system

Abstract

The invention discloses an integrated new energy commercial vehicle electric drive assembly system, and relates to the technical field of electric vehicles. Comprising an electric control unit, and the inner axial end face of the electric control unit is rigidly connected to the axial end face of one side of a motor unit; the axial end face of the inner side of the gearbox unit is rigidly connected to the axial end face of the other side of the motor unit; wherein the electric control unit is used for controlling and managing the motor unit and the gearbox unit; the motor unit is used for providing a power source for the electric drive assembly system; the gearbox unit is used for changing the rotating speed and torque of the motor unit. Compared with the prior art, the integrated new energy commercial vehicle electric drive assembly system has the advantages that the space is greatly saved, the whole drive system is more compact, the space utilization rate of the vehicle is increased, the maintenance cost is reduced, the energy loss is reduced, the system temperature is effectively reduced, and the service life of the vehicle is prolonged. And the stability and the reliability of the system are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of electric vehicles, and in particular, 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 can no longer meet the development needs. The current new energy commercial vehicle power system consists of multiple components, including power supply, electronic control system, motor, DC bus, AC line, cooling unit, gearbox, etc. These components are arranged independently, forming a relatively decentralized and complex structure. However, with the growing demand for performance, efficiency, integration and lightweight of electric commercial vehicles, the traditional component layout method has shown 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 can ensure the stability of the system in some cases, it must cope with the challenges of high current and high heat dissipation when facing the demand for high-power motor drive. Traditional electrical connection methods, such as single-line or dual-line layout, not only need to increase the carrying capacity of the cable, but may also cause the wiring harness to be lengthy and heavy, thereby affecting the overall performance and efficiency of the vehicle. On the other hand, with the increase in power demand for electric commercial vehicles, the size and weight of batteries, motors, and electronic control systems are also increasing. How to efficiently integrate these components in a limited space has become a key problem in design.

[0004] In this context, the design of an integrated powertrain system is particularly important. The core goal of 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 overall efficiency and reliability. Through reasonable integration, a closer connection can be established between the battery, motor and electronic control system, thereby reducing redundant wiring harnesses and components and improving the heat dissipation performance of the system. In addition, integrated design can also effectively reduce production costs, reduce assembly difficulty, and improve the production efficiency of the entire vehicle.

[0005] However, the research and development of integrated powertrain systems also faces a series of technical challenges. First, the integrated system needs to achieve a precise balance in terms of structure, function and thermal management. Secondly, the reliability and safety of the system must be fully guaranteed, especially in high-power and high-voltage environments. How to ensure the electrical safety of batteries, electronic control systems and motors and the effectiveness of thermal management is still a difficult problem that needs to be overcome during the research and development process. Finally, the integrated design also needs to take into account 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 high-efficiency 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 layout, centralized cooling and space layout optimization of the entire vehicle through the integrated design of the electronic control unit, motor unit and gearbox unit.

[0008] In order to achieve the above objectives, the present application provides an integrated new energy commercial vehicle electric drive assembly system, including: An electronic control unit, wherein the inner axial end surface of the electronic control unit is rigidly connected to one axial end surface of the motor unit; a gearbox unit, wherein the inner axial end surface of the gearbox unit is rigidly connected to the other axial end surface of the motor unit; Among them, the electronic control unit is used to control and manage the motor unit and the gearbox unit; the motor unit is used to provide a power source for the electric drive assembly system; and the gearbox unit is used to change the speed and torque of the motor unit.

[0009] According to the above system of the embodiment of the present application, the following additional technical features may also be provided: Further, 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 outside of the electronic control unit housing, a second air-permeable valve is installed below the second electronic control unit cooling water nozzle, and a first electronic control unit cooling water nozzle and a first air-permeable valve are symmetrically installed on the right side and the left side of the outside of the electronic control unit housing; 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.

[0010] Furthermore, a DC module shell is installed on the outer upper side of the electronic control unit shell, a DC module cover is installed above the DC module shell, a sealing groove is provided between the DC module shell and the DC module cover, and a sealing ring is provided in the sealing groove; a DC module is installed inside the DC module shell, a second DC pressure plate bracket and a third DC pressure plate bracket are respectively installed on both sides of the DC module shell, the second DC pressure plate bracket and the third DC pressure plate bracket are symmetrically arranged and fixed on the electronic control unit shell, perpendicular to the second DC pressure plate bracket and the third DC pressure plate bracket, and a first DC pressure plate bracket is also provided, the first DC pressure plate bracket is fixed by the second DC pressure plate bracket and the third DC pressure plate bracket, the first DC pressure plate and the 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 pairs to form a circular wire trough for DC high-voltage lines.

[0011] Furthermore, the electric control unit includes an electric control unit housing, a sealing groove is provided between the electric control unit housing and the DC module housing, and a sealing ring is provided in the sealing groove; the interior of the electric control unit housing is divided into three parts, the first part includes a safety capacitor module, the second part is further divided into an upper and lower layer structure, including an upper layer inside the electric control unit and a lower layer inside the electric control unit, and the third part includes an AC module; Among them, a driving module is installed in the lower layer inside the electronic control, and a safety capacitor module is installed between the driving module and the DC module through a bolt group. The safety capacitor module is used to ensure the electrical safety of the system.

[0012] Furthermore, a discharge resistor is installed between the safety capacitor module and the DC module, and the discharge resistor is used to release the charge.

[0013] Furthermore, a control unit is installed on the upper layer of the electric control, the control unit is installed above the drive module through a control unit bracket, and the drive module is installed between the safety capacitor module and the AC module through a bolt group; A low-voltage unit is also installed below the second ventilation valve. The low-voltage unit is used to supply power to the control unit. The low-voltage unit is connected to the control unit using a wiring harness.

[0014] Furthermore, a DC module housing mounting hole is provided on the housing of the electric control unit, and symmetrically arranged DC copper busbars are also installed inside the DC module housing.

[0015] Furthermore, an AC module mounting seat is provided on the electric control unit shell, the AC module is installed on the AC module mounting seat, an AC module cover is also installed at the bottom of the electric control unit shell, a sealing groove is provided between the electric control unit shell and the AC module cover, and a sealing ring is provided in the sealing groove.

[0016] Furthermore, the AC module is provided with a first AC copper bar, a second AC copper bar and a third AC copper bar, and the drive module is connected to the first AC copper bar, the second AC copper bar and the third AC copper bar through a bolt group.

[0017] Furthermore, an electric control unit housing cover is provided on the electric control unit housing, a sealing groove is provided between the electric control unit housing and the electric control unit housing cover, and a sealing ring is provided in the sealing groove.

[0018] Compared with the prior art, the integrated new energy commercial vehicle electric drive assembly system provided by the embodiment of the present application has the following beneficial technical effects: The embodiment of the present application saves a lot of space by integrating the electronic control unit, the motor unit and the gearbox unit, making the entire drive system more compact and improving the space utilization of the vehicle; the modular design allows each unit to be disassembled and replaced independently, reducing maintenance costs and facilitating technical upgrades of the system to adapt to changing market demands; because the electronic control unit accurately controls and manages the motor unit and the gearbox unit, power transmission is more efficient and energy loss is reduced.

[0019] The electronic control unit and motor unit in the embodiment of the present application are equipped with cooling water nozzles and air valves, which effectively reduce the system temperature and improve the stability and reliability of the system through cooling water circulation and gas exchange; sealing grooves and sealing rings are provided on the housing of the electronic control unit to ensure the sealing between the modules, prevent electrical leakage and moisture intrusion, and improve the safety and durability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The schematic diagram of the integrated new energy commercial vehicle electric drive assembly system of the embodiment of the present application is shown; Figure 2 A schematic diagram of an electronic control unit of an integrated new energy commercial vehicle electric drive assembly system according to an embodiment of the present application is shown; Figure 3 A schematic diagram of the upper layout of the electric control system of the integrated new energy commercial vehicle electric drive assembly system according to an embodiment of the present application is shown; Figure 4 A schematic diagram of the lower-level layout of the electronic control internals of an integrated new energy commercial vehicle electric drive assembly system according to an embodiment of the present application is shown.

[0021] Description of the accompanying drawings: 101, electronic control unit; 201, motor unit; 301, gearbox unit; 102, DC module cover; 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 electronic control unit cooling nozzle; 111, first breathable valve; 112, second electronic control unit cooling nozzle; 113, second breathable valve; 114, low voltage unit; 115, electronic control unit housing cover; 116, AC module cover; 117, DC module; 118, DC copper busbar; 119, safety capacitor module; 120, discharge resistor; 121, control unit; 122, control unit bracket; 123, first AC copper busbar; 124, second AC copper busbar; 125, third AC copper busbar; 126, AC module; 127, drive module; 128, electronic control unit housing; 202, first motor unit cooling nozzle; 203, second motor unit cooling nozzle. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0023] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0024] like Figure 1 As shown, the embodiment of the present application provides an integrated new energy commercial vehicle electric drive assembly system, including: The electronic control unit 101 has its inner axial end surface rigidly connected to one axial end surface of the motor unit 201 , and is used to control and manage the motor unit 201 and the gearbox unit 301 .

[0025] The motor unit 201 is located between the electronic control unit 101 and the gearbox unit 301. The electronic control unit 101 and the gearbox unit 301 are rigidly connected to the axial end faces on both sides thereof, respectively, to provide a power source for the electric drive assembly system.

[0026] The gearbox unit 301 has an inner axial end surface rigidly connected to the other axial end surface of the motor unit 201 , and is used to change the rotation speed and torque of the motor unit 201 .

[0027] Specifically, the electronic control unit 101 serves as the "brain" of the system. The electronic control unit 101 is responsible for receiving instructions from the driver or other sensors (not shown in the figure), and then processing these instructions, and finally adjusting the vehicle speed and torque by controlling the motor unit 201 and the gearbox unit 301.

[0028] The motor unit 201 serves as the power source of the system, and the motor unit 201 converts electrical energy into mechanical energy to drive the vehicle forward. Depending on the specific application scenario, the motor unit 201 may be a DC motor, an AC motor, or a permanent magnet synchronous motor, etc., which is not further limited in the present embodiment of the application.

[0029] The main function of the gearbox unit 301 is to change the speed and torque of the motor unit 201 to adapt to different driving conditions and driver's needs.

[0030] The system integrates the electronic control unit 101, the motor unit 201 and the gearbox 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, the system can provide strong power output for new energy commercial vehicles. At the same time, the flexible adjustment of the gearbox unit 301 also ensures that the vehicle can maintain optimal power performance under various driving conditions. Compared with traditional fuel drive systems, the system has lower emissions and higher energy efficiency. It helps to reduce environmental pollution and energy consumption, and is in line with the concept of sustainable development.

[0031] like Figure 2 As shown, the second electric control unit cooling water nozzle 112 and the first electric control unit cooling water nozzle 110 as well as the second breathable valve 113 and the first breathable valve 111 are respectively installed on the left and right sides of the electric control unit housing 128. This symmetrical design helps to ensure that the electric control unit 101 can dissipate heat evenly during operation and prevent excessive internal pressure.

[0032] Above the first electronic control unit cooling nozzle 110, the second motor unit cooling nozzle 203 and the first motor unit cooling nozzle 202 are installed in order from bottom to top. This arrangement shows that the cooling water first flows through the electronic control unit 101 and then flows to the motor unit 201, which helps to achieve coordinated cooling of the two units. The first electronic control unit cooling nozzle 110 and the second motor unit cooling nozzle 203 are connected by a 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.

[0033] The embodiment of the present application can significantly improve the cooling efficiency of the entire electric drive assembly system through the coordinated cooling design of the electronic control unit 101 and the motor unit 201. This helps to ensure the stable operation of the system in a high temperature environment and extend the service life. The symmetrical arrangement of the cooling nozzles and the breathable valves not only improves the cooling effect, but also facilitates daily maintenance and inspection. Maintenance personnel can easily access these components to carry out necessary cleaning and replacement work. Through effective cooling and ventilation 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.

[0034] The electric control unit housing 128 of the embodiment of the present application serves as a carrier of the entire electric control unit 101, and provides protection and support. The DC module housing 103 is fixed to the outer upper side of the electric control unit housing 128 by a bolt group, and is used to accommodate and protect the DC module 117. The electric 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 electric control unit housing 128 through these mounting holes. These mounting holes provide an interface for the DC module housing 103 to connect with the electric control unit housing 128, which can ensure that the DC module housing 103 can be accurately installed on the electric control unit housing 128 and maintain a stable connection.

[0035] The second DC pressure plate bracket 107 and the third DC pressure plate bracket 108 are respectively installed on both sides of the DC module housing 103, which are symmetrically arranged and fixed on the electric 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 electric control unit 101.

[0036] In addition, a first DC platen bracket 106 is provided which is perpendicular to the second DC platen bracket 107 and the third DC platen bracket 108. The first DC platen bracket 106 is fixed by the second DC platen bracket 107 and the third DC platen bracket 108, and such a bracket structure provides a more stable support for the DC high voltage line.

[0037] The first DC pressing plate 104 and the second DC pressing plate 105 are installed above the first DC pressing plate bracket 106. The two pressing plates are mounted in pairs to form a circular line duct for the DC high voltage line.

[0038] The DC module cover 102 is located above the DC module housing 103 to provide additional protection to prevent external factors such as dust and moisture from affecting the DC module 117 and ensure the air tightness of the entire device.

[0039] In the integrated new energy commercial vehicle electric drive assembly system, the electronic control unit 101 plays a vital role. It is responsible for controlling and managing the motor unit 201 and the gearbox unit 301 to ensure the stable operation of the entire system. Figure 3 and Figure 4 As shown, the ECU 101 is wrapped by an ECU housing 128, which plays a vital role. It not only needs to protect the internal electronic components from interference and damage from the external environment, but also needs to ensure the reliability of the connection and communication between various modules. Therefore, the design of the ECU housing 128 needs to consider multiple factors, including structural strength, heat dissipation performance, sealing performance, etc.

[0040] 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 divided into two layers, including an upper layer inside the electronic control unit and a lower layer inside the electronic control unit. The third part includes the AC module 126 .

[0041] Among them, the first part is installed with a safety capacitor module 119, which is located inside the electronic control unit 101 and installed between the drive module 127 and the DC module 117 through 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 and limit the fault current within a safe range, and can suppress common-mode and differential-mode interference, smooth voltage, and prevent overload current, thereby protecting the entire system from damage.

[0042] The second part is further divided into the upper layer of the electric control system and the lower layer of the electric control system. The lower layer of the electric control system is equipped with a drive module 127, which drives the motor unit 201 to operate by receiving electric energy from the safety capacitor module 119; the upper layer of the electric control system is equipped with a control unit 121, which is responsible for receiving signals from the vehicle end, and controls and manages the motor unit 201 and the gearbox unit 301 through the drive module 127 according to these signals and preset algorithms and logics (not shown in the figure). 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 the 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; In the embodiment of the present application, a low-voltage unit 114 is further installed below the second breathable valve 113, and the low-voltage unit 114 is used to realize communication between the vehicle and the control unit 121, and to 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 wiring harness inside the electric control unit 101, and is connected to the vehicle controller through a wiring harness outside.

[0043] The third part includes an AC module 126, which is an important component of the electric drive system. The AC module 126 has electric energy metering and monitoring functions 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.

[0044] In the embodiment of the present application, a first AC copper bar 123, a second AC copper bar 124 and a third AC copper bar 125 are also provided on the AC module 126. These copper bars are important channels for power transmission, and they transmit power from the drive module 127 to the motor unit 201, thereby driving the motor unit 201 to operate. The selection and design of the copper bars are crucial to the performance and safety of the system, because they need to withstand high current and high temperature while maintaining good conductivity and mechanical strength.

[0045] This layout ensures a close connection between the driving module 127 and other components, reduces the length of the copper bus, further compresses the assembly space, and reduces the thermal impact between them.

[0046] 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 vital role in the electric drive assembly system. Its main function is to release the charge, ensuring that the electric energy stored in the capacitor can be safely and quickly released when the system is powered off or maintenance is required.

[0047] 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 the two modules can ensure that when the capacitor needs to be discharged, the electrical energy can be quickly and safely released through the discharge resistor 120.

[0048] 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. A symmetrically arranged DC copper bus 118 is installed inside the DC module housing 103. The DC copper bus 118 is an important component for transmitting DC power 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 copper bus 118 is responsible for transmitting electrical energy from the battery or other DC power source to the safety capacitor module 119.

[0049] The symmetrical arrangement of the DC copper busbar 118 can not only ensure the uniform distribution and transmission of electric energy, but also improve the reliability and stability of the system. At the same time, through reasonable arrangement and design, the heat dissipation performance of the DC copper busbar 118 can also be optimized, and the temperature rise and energy consumption of the system can be reduced.

[0050] Furthermore, the design of the electronic control unit housing 128, as the core protective structure of the entire electric drive system, not only takes into account the structural robustness and durability, but also pays special attention to electrical safety and sealing performance.

[0051] The use of the bolt group ensures close contact between the drive module 127 and the AC copper busbar, thereby reducing contact resistance and improving the efficiency of power transmission. In addition, the bolt group also provides the convenience of easy disassembly and maintenance, making it easy to replace or repair related components when necessary.

[0052] In the integrated new energy commercial vehicle electric drive assembly system, the close integration and optimized design between the various components are crucial. Through reasonable layout and precise connection, the overall performance and safety of the system can be ensured.

[0053] Furthermore, the electric control unit housing 128 of the embodiment of the present application is also provided with an electric control unit housing cover 115, and the primary function of the electric control unit housing cover 115 is to protect the various components inside the electric control unit 101 from interference and damage from the external environment. This includes preventing dust, moisture, oil and other impurities from entering the electric 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.

[0054] 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 115 can also effectively shield electromagnetic interference, reduce interference to other electronic devices, and improve the electromagnetic compatibility of the entire vehicle.

[0055] In the embodiment of the present application, sealing grooves are provided between the DC module cover 102 and the DC module housing 103, between the electric control unit housing 128 and the DC module housing 103, between the electric control unit housing 128 and the electric control unit housing cover 115, and between the AC module cover 116 and the electric control unit housing 128, and sealing rings are provided in the sealing grooves. The sealing grooves are a special structure for accommodating sealing rings. The sealing rings are usually made of elastic materials and have excellent sealing properties. The design of this structure can effectively prevent impurities such as moisture and dust from entering the interior of the assembly system from the connection between the structures, thereby ensuring the air tightness of the whole machine.

[0056] It should be noted that, in the present application, the terms "comprise", "include" or any other variant 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 explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment 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 reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0057] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An integrated new energy commercial vehicle electric drive assembly system, characterized in that: The system comprises: An electric control unit (101), wherein the inner axial end surface of the electric control unit (101) is rigidly connected to one axial end surface of the motor unit (201); a gearbox unit (301), wherein the inner axial end surface of the gearbox unit (301) is rigidly connected to the other axial end surface of the motor unit (201); The electronic control unit (101) is used to control and manage the motor unit (201) and the gearbox unit (301); the motor unit (201) is used to provide a power source for the electric drive assembly system; and the gearbox unit (301) is used to change the rotation speed and torque of the motor unit (201).

2. The integrated new energy commercial vehicle electric drive assembly system according to claim 1, characterized in that: The electric control unit (101) comprises an electric control unit housing (128), a second electric control unit cooling water nozzle (112) is installed on the left side of the outside of the electric control unit housing (128), a second air permeability valve (113) is installed below the second electric control unit cooling water nozzle (112), and a first electric control unit cooling water nozzle (110) and a first air permeability valve (111) are symmetrically installed on the right side and the left side of the outside of the electric control unit housing (128); 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 above the first electric control unit cooling water nozzle (110), and a cooling water pipe (109) is connected between the first electric control unit cooling water nozzle (110) and the second motor unit cooling water nozzle (203).

3. The integrated new energy commercial vehicle electric drive assembly system as claimed in claim 2, characterized in that: A DC module housing (103) is installed on the upper outer side of the electric control unit housing (128); a DC module cover (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 (102); 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 bracket (107) and a third DC pressure plate bracket (108) are respectively installed on both sides of the DC module housing (103); the second DC pressure plate bracket (107) and the third DC pressure plate bracket (108) are respectively installed on the upper outer side of the electric control unit housing (128); 8) is symmetrically arranged and fixed on the electric control unit housing (128), perpendicular to the second DC pressure plate bracket (107) and the third DC pressure plate bracket (108), and is also provided with a first DC pressure plate bracket (106), the first DC pressure plate bracket (106) is fixed by the second DC pressure plate bracket (107) and the third DC pressure plate bracket (108), and the first DC pressure plate (104) and the second DC pressure plate (105) are installed above the first DC pressure plate bracket (106), and the first DC pressure plate (104) and the second DC pressure plate (105) are installed in a pair to form a circular wire trough for the DC high-voltage line.

4. The integrated new energy commercial vehicle electric drive assembly system as claimed in claim 3, characterized in that: The electric control unit (101) comprises an electric control unit housing (128), a sealing groove is provided between the electric control unit housing (128) and the DC module housing (103), a sealing ring is provided in the sealing groove; the interior of the electric control unit housing (128) is divided into three parts, the first part comprises a safety capacitor module (119), the second part is further divided into an upper and lower layer structure, comprising an upper electric control internal layer and a lower electric control internal layer, and the third part comprises an AC module (126); A drive module (127) is installed in the lower layer of the electric control, and a safety capacitor module (119) is installed between the drive module (127) and the DC module (117) via a bolt group, wherein the safety capacitor module (119) is used to ensure the electrical safety of the system.

5. The integrated new energy commercial vehicle electric drive assembly system as claimed in claim 4, characterized in that: A discharge resistor (120) is installed between the safety capacitor module (119) and the DC module (117), and the discharge resistor (120) is used to release electric charge.

6. The integrated new energy commercial vehicle electric drive assembly system as claimed in claim 4, characterized in that: A control unit (121) is installed on the upper layer of the electric control, the control unit (121) is installed above the drive module (127) via a control unit bracket (122), and the drive module (127) is installed between the safety capacitor module (119) and the AC module (126) via a bolt group; A low-pressure unit (114) is also installed below the second breathable valve (113), and the low-pressure unit (114) is connected to the control unit (121) using a wiring harness.

7. The integrated new energy commercial vehicle electric drive assembly system as claimed in claim 3, characterized in that: The electric control unit housing (128) is provided with a DC module housing (103) mounting hole, and symmetrically arranged DC copper busbars (118) are also mounted inside the DC module housing (103).

8. The integrated new energy commercial vehicle electric drive assembly system as claimed in claim 6, characterized in that: An AC module mounting seat is provided on the electric control unit housing (128), the AC module (126) is mounted on the AC module mounting seat, an AC module cover (116) is also installed on the bottom of the electric control unit housing (128), a sealing groove is provided between the electric control unit housing (128) and the AC module cover (116), and a sealing ring is provided in the sealing groove.

9. The integrated new energy commercial vehicle electric drive assembly system as claimed in claim 6, characterized in that: The AC module (126) is provided with a first AC copper bar (123), a second AC copper bar (124), and a third AC copper bar (125); the drive module (127) is connected to the first AC copper bar (123), the second AC copper bar (124), and the third AC copper bar (125) via a bolt group.

10. The integrated new energy commercial vehicle electric drive assembly system according to any one of claims 2 to 9, characterized in that: An electric control unit housing cover plate (115) is also provided on the electric control unit housing (128), a sealing groove is provided between the electric control unit housing (128) and the electric control unit housing cover plate (115), and a sealing ring is provided in the sealing groove.

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