Modular arrangement method for cabin of pure electric commercial vehicle

Abstract

The invention relates to the technical field of pure electric commercial vehicle chassis, and particularly discloses a pure electric commercial vehicle cabin modular arrangement method, which comprises the following steps: S1, defining a single-layer tiled arrangement principle, and mounting chassis accessories on a vehicle chassis frame; s2, defining a high-pressure interface and a low-pressure interface of the controller by adopting a high-low pressure separation principle; s3, defining an interface standardization principle, and performing integrated management on a low-voltage wire harness and a brake pipeline interface; s4, a cabin module integral split charging scheme is adopted for installation; high integration and modularization of cabin module accessories and interfaces are achieved, it is guaranteed that a controller and the accessories are not shielded up and down, meanwhile, cab assembly positioning is reduced, the cab internal space is increased, the modularization degree of a vehicle is improved, connector varieties are reduced, the reliability of the whole vehicle is improved, and offline split charging of the cabin module is achieved; according to the scheme, the process scheme that all current parts of a new energy vehicle model are independently assembled is broken through, and the whole vehicle assembling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pure electric commercial vehicle chassis, and in particular to a modular arrangement method for a pure electric commercial vehicle cabin. Background Art

[0002] The chassis accessories of pure electric vehicles mainly include: all-in-one integrated controller, MCU, BMS, electric steering oil pump, electric air compressor, air handling unit, air filter, low-voltage battery, and air-conditioning compressor.

[0003] 1. Cabin module: Located at the bottom of the pure electric commercial vehicle cab, it is a power accessory module that integrates components such as an all-in-one integrated controller, a low-voltage battery, integrated auxiliary equipment, an air handling unit, and an air-conditioning compressor.

[0004] 2. All-in-one integrated controller: A controller that integrates high-voltage power distribution, steering oil pump DC / AC, air pump DC / AC, DC / DC, main drive motor controller, insulation tester and other functions. Depending on the number of integrated functions, it can be four-in-one, five-in-one, six-in-one, etc.

[0005] 3. Integrated auxiliary machine: The electric steering oil pump and electric air compressor are integrated and driven by a common motor.

[0006] 4.MCU: motor controller.

[0007] 5.BMS: power battery management system.

[0008] There are two main layout schemes in the prior art: stacking up and down and both sides of the frame longitudinal beam:

[0009] Solution 1: Up and down stacking arrangement

[0010] The electric steering oil pump is arranged above the left longitudinal beam 1 of the frame, the air conditioning compressor is arranged above the right longitudinal beam 2 of the frame, the low-voltage battery is arranged outside the right longitudinal beam 2 behind the first axle, and the air handling unit is arranged inside the left longitudinal beam 1 of the chassis. The bottom of the cab is arranged in three layers, the top layer is arranged from front to back with the all-in-one integrated controller and BMS, the middle layer is arranged with MCU, and the bottom layer is arranged with electric air compressor and air filter. For specific layout, see the attached Figure 1 and attached Figure 2 .

[0011] Disadvantages of Solution 1:

[0012] 1. Poor maintainability: The all-in-one integrated controller, MCU and electric air compressor are stacked up and down. When repairing the MCU, the all-in-one integrated controller and its bracket, high and low voltage wiring harness and cooling pipes must be removed at the same time. The current market demand for motor peak power is relatively large, and the main drive DC high voltage wire connecting the all-in-one integrated controller and MCU is relatively thick (150mm2 ), difficult to disassemble. The electric air compressor and air filter are arranged on the bottom layer, and the filter element is difficult to replace. When repairing the air compressor, it is necessary to disassemble and repair it under the trench of the maintenance station.

[0013] 2. The wiring harness layout is not aesthetically pleasing: The existing MCU, all-in-one integrated controller and BMS interface are not defined according to the high and low voltage wiring harness layout and direction requirements. The high and low voltage wiring harnesses and cooling pipes are crossed with each other, and the wiring harness aesthetics are poor.

[0014] 3. Poor reliability: There is no clear layout plan and regional division for high and low voltage wiring harnesses and cooling pipes. After the chassis accessories are arranged in layers, there are problems with crossover and long connection paths in the high and low voltage wiring harnesses. Adequate physical space isolation and protection are not guaranteed, which can easily lead to electromagnetic compatibility problems such as signal interference, erroneous frame messages, and abnormal high voltage drop. In severe cases, the vehicle may be stopped.

[0015] 4. Low assembly efficiency: Chassis accessories such as electric air compressors, MCUs, all-in-one integrated controllers, BMS, etc. require a total of 8 mounting brackets for fixation and cannot be assembled offline, resulting in poor chassis assembly processability.

[0016] Option 2: Arrangement on both sides of the frame longitudinal beam

[0017] The electric steering oil pump is arranged above the left longitudinal beam 1 of the frame, the air conditioning compressor is arranged above the right longitudinal beam 2 of the frame, the low-voltage battery is arranged outside the right longitudinal beam 2 behind the first axle, the electric air compressor is arranged outside the left longitudinal beam 1 of the frame behind the first axle, and the air handling unit is arranged inside the left longitudinal beam 1 of the chassis. The all-in-one integrated controller, BMS and MCU are arranged at the bottom of the cab. See the attached for specific layout. Figure 3 and attached Figure 4 .

[0018] Disadvantages of Option 2

[0019] 1. Low space utilization: Chassis accessories are scattered at the bottom of the cab and on both sides of the frame longitudinal beams, and the space utilization at the bottom of the cab is low.

[0020] 2. Low reliability: The electric air compressor is arranged on the outside of the left longitudinal beam 1 of the frame, and the high and low voltage interfaces and wiring harnesses connecting the all-in-one controller and the electric air compressor are exposed, with poor protection performance and easy damage.

[0021] 3. Long vehicle pipelines: Chassis accessories are scattered and arranged according to the principle of high and low voltage wiring harnesses and pipelines. The wiring harness and pipeline paths are long, and a large number of fixing points need to be added, which increases weight and cost.

[0022] Therefore, it is necessary to design a cabin module layout method that can improve the space utilization of the whole vehicle, is highly integrated, and is easy to maintain, so as to solve the problems of scattered layout of cabin module chassis accessories, poor maintainability, poor reliability, low space utilization, and poor aesthetics. Summary of the invention

[0023] In view of the problems existing in the prior art, an object of the present invention is to provide a modular layout method for a cabin of a pure electric commercial vehicle.

[0024] The technical solution adopted by the present invention to solve the technical problem is: a modular layout method for a pure electric commercial vehicle cabin, comprising the following steps:

[0025] S1. Define the principle of single-layer flat layout to install chassis accessories on the vehicle chassis frame;

[0026] S2. Adopt the principle of high and low voltage separation to define the high voltage interface and low voltage interface of the controller;

[0027] S3. Define the interface standardization principle and integrate the management of low-voltage wiring harness and brake line interfaces;

[0028] S4. The installation adopts the overall sub-assembly scheme of the cabin module.

[0029] Preferably, the chassis accessories in step S1 include but are not limited to an all-in-one integrated controller, a low-voltage battery, an integrated auxiliary machine, an air handling unit, an air filter, and an air conditioning compressor.

[0030] Preferably, the single-layer flat layout principle in step S1 is as follows in the left-hand vehicle model: the air-conditioning compressor is arranged above the front end of the left longitudinal beam of the frame, the air filter is arranged on the outside of the front end of the right longitudinal beam of the frame, and the low-voltage battery and air handling unit, integrated auxiliary machine, all-in-one integrated controller and other accessories are arranged in a single layer with equal height. The low-voltage battery and air handling unit, integrated auxiliary machine, all-in-one integrated controller are arranged in sequence from the opposite direction of the vehicle's travel according to the flow direction of the high-voltage path, and the high-voltage wiring harness path is arranged with the shortest path.

[0031] Preferably, the single-layer flat layout principle in step S1 in the right-hand vehicle model causes changes in the layout positions of air conditioning, steering, braking mechanisms, etc., which will adjust the orientation of the low-voltage battery and integrated auxiliary machine of the cabin module, or swap the positions of the low-voltage battery, air filter, and air handling unit, or adjust the front and rear positions of each component.

[0032] Preferably, the controller in step S2 is an all-in-one integrated controller, which defines the position and direction of the high pressure interface according to the arrangement of the accessory main drive and auxiliary drive and the high pressure flow direction, and controls the separation of high and low pressure.

[0033] Preferably, the high and low pressure separation is arranged so that the high pressure line is arranged on the left longitudinal beam, and the low pressure line and pipeline are arranged on the right longitudinal beam, or the high pressure wire harness is arranged on the right longitudinal beam, and the low pressure wire harness and pipeline are arranged on the left longitudinal beam.

[0034] Preferably, the low-voltage wiring harness and brake line interface integrated management in step S3 is achieved through a highly integrated 18-pin low-voltage connector or an eight-way wall connector for standardized connection and modular packaging of wiring harnesses and pipelines.

[0035] Preferably, the integral subassembly scheme of the cabin module in step S4 is to be integrally mounted at the bottom of the cab or to be integrally arranged in the middle of the rear chassis of the cab.

[0036] Preferably, different solutions of the all-in-one integrated controller include but are not limited to a four-in-one integrated controller, a five-in-one integrated controller, a six-in-one integrated controller, and an eight-in-one integrated controller.

[0037] A new energy vehicle adopting the modular layout method of a pure electric commercial vehicle cabin as described in any one of claims 1 to 9.

[0038] The present invention has the following beneficial effects:

[0039] Modular layout method for cabin of pure electric commercial vehicle designed by the present invention

[0040] 1. Improved maintenance convenience: Maintenance time is shortened by ≥50%. The "flat-lay" layout scheme is adopted to arrange the four-in-one integrated controller, integrated auxiliary machine, 24V lithium battery, and air handling unit on the same plane. When any component fails and needs maintenance, it will not be related to other components. The cab can be opened for maintenance, avoiding the problem of removing other components to repair the faulty parts caused by the stacking layout scheme.

[0041] 2. Improved reliability: Define the "high and low voltage separation" principle, arrange the high-voltage wiring harness on the left longitudinal beam, and the low-voltage wiring harness on the right longitudinal beam. The distance between the high and low voltage wiring harnesses is >500mm, which can avoid the electromagnetic interference problem caused by the high-voltage wiring harness to the low voltage from the source. The separation of high and low voltage wiring harnesses and interfaces can improve the reliability of the high-voltage system and the entire vehicle network by ≥50%.

[0042] 3. Improved aesthetics: The high and low voltage harnesses and pipelines are laid out in a flat layout according to the principle of layout. The pipeline harnesses are streamlined and neat, and the high voltage harness of a single vehicle is shortened by ≥5m. When the electric drive bridge technology route is used, the high voltage main drive harness enters the left longitudinal beam of the frame in the shortest path, extends along the inner side of the left longitudinal beam and connects to the electric drive bridge MCU. When the motor + AMT technology route is used, the main drive high voltage three-phase line is directly opposite to the three-phase line interface of the drive motor and is connected to the drive motor in the shortest path. The air-conditioning compressor is arranged on the left side of the frame, and the auxiliary drive high voltage harness of the all-in-one integrated controller enters the left longitudinal beam in the shortest path and is connected to high voltage components such as the air-conditioning compressor, integrated auxiliary machine, and PTC.

[0043] 4. Integration and lightweight: The electric steering oil pump and electric air compressor are integrated, and the battery uses a lithium battery. The all-in-one integrated controller, integrated auxiliary machine, low-voltage battery and air handling unit are integrated on a frame with a vibration reduction effect. The separate fixed brackets of each module are eliminated to achieve a high degree of functional and structural integration, reducing the weight by more than 140kg.

[0044] 5. Modular layout: The space utilization rate of the whole vehicle is improved, and the scattered accessories on both sides of the chassis frame longitudinal beam are planned to be arranged in the cabin module, and the cabin module layout space is fully utilized. At the same time, the power battery expansion space on both sides of the chassis frame is increased to improve the scalability of the vehicle's cruising range. For large power requirements, the bottom battery replacement or side-mounted large-capacity power battery solution can be used to lower the center of gravity of the whole vehicle.

[0045] 6. Interface standardization and generalization: The integrated layout of the cabin module is not limited by the vehicle model, electric drive technology route and drive form. It can match the multi-in-one integrated controller (four-in-one, five-in-one, etc.), low-voltage batteries with different capacities, integrated auxiliary machines with different powers, etc., to ensure that the position and direction of each high-voltage harness interface are the same. At the same time, the fixed position and model of the integrated low-voltage connector and the brake line integrated connector are defined to ensure the universality and interchangeability between the components.

[0046] 7. Improved interior space: The cabin module boundary size is unified for different models, and the cab is positioned lower. The cab eliminates the bulge structure at the engine compartment of the diesel vehicle, increases the interior space of the cab, and improves the driving comfort of users.

[0047] 8. Improved safety: The high-voltage interfaces and high-voltage wiring harnesses of the cabin module chassis accessories and controllers are all located at the bottom of the cab, with good protection performance, which can prevent the vehicle's high-voltage system from being bumped during driving or from being directly flushed by a water gun during flushing, causing vehicle failures, thereby improving the safety of the vehicle's high-voltage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a top view of the stacked arrangement of cabins in the prior art.

[0049] Figure 2 It is a side view of the stacked arrangement of cabins in the prior art.

[0050] Figure 3 It is a top view of the arrangement of both sides of the longitudinal beams of the cabin frame in the prior art.

[0051] Figure 4 It is a side view of the arrangement on both sides of the longitudinal beam of the cabin frame in the prior art.

[0052] Figure 5 It is a top view of the modular layout of the cabin of a pure electric commercial vehicle.

[0053] Figure 6It is a schematic diagram of the structure of an embodiment of the modular layout of the cabin of a pure electric commercial vehicle.

[0054] In the figure: 1-left longitudinal beam; 2-right longitudinal beam. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0056] like Figure 5-Figure 6 As shown, a modular layout method for a pure electric commercial vehicle cabin includes the following steps:

[0057] S1. Define the principle of single-layer flat layout and install chassis accessories on the vehicle chassis frame; chassis accessories include but are not limited to all-in-one integrated controller, low-voltage battery, integrated auxiliary machine, air handling unit, air filter, and air conditioning compressor.

[0058] S2. Adopt the principle of high and low pressure separation to define the high pressure interface and low pressure interface of the controller; the controller is an all-in-one integrated controller, which defines the position and direction of the high pressure interface according to the arrangement of the main drive and auxiliary drive of the accessories and the high pressure flow direction, and controls the high and low pressure separation.

[0059] S3. Define the interface standardization principle and integrate the low-voltage wiring harness and brake line interface management; use highly integrated 18-pin low-voltage connectors or eight-way wall connectors for standardized connection and modular packaging of wiring harnesses and pipelines.

[0060] S4. The installation adopts the overall sub-assembly scheme of the cabin module, which is integrally installed at the bottom of the cab or arranged as a whole in the middle of the chassis behind the cab.

[0061] The single-layer flat layout principle is as follows: in left-hand vehicle models: the air-conditioning compressor is arranged above the front end of the left longitudinal beam 1 of the frame, the air filter is arranged on the outside of the front end of the right longitudinal beam of the frame, and the low-voltage battery and air handling unit, integrated auxiliary machine, all-in-one integrated controller and other accessories are arranged in a single layer with equal height. According to the flow direction of the high-voltage path, the low-voltage battery and air handling unit, integrated auxiliary machine, and all-in-one integrated controller are arranged in sequence from the opposite direction of the vehicle's travel, and the high-voltage wiring harness path is arranged with the shortest path.

[0062] The single-layer flat layout principle in right-hand vehicle models will cause changes in the layout of mechanisms such as air conditioning, steering, and braking, which will adjust the direction of the low-voltage battery and integrated auxiliary equipment in the cabin module, or swap the positions of the low-voltage battery, air filter, and air handling unit, or adjust the front and rear positions of each component.

[0063] The high and low voltage separation allows the high voltage line to be arranged on the left longitudinal beam 1, and the low voltage line and pipeline to be arranged on the right longitudinal beam 2, or the high voltage wire harness to be arranged on the right longitudinal beam 2, and the low voltage wire harness and pipeline to be arranged on the left longitudinal beam 1.

[0064] Different solutions of the all-in-one integrated controller include but are not limited to a four-in-one integrated controller, a five-in-one integrated controller, a six-in-one integrated controller, and an eight-in-one integrated controller.

[0065] Low-voltage batteries, 24V lithium batteries, or 48V lithium batteries, 24V lead-acid batteries, 48V lead-acid batteries and other low-voltage energy storage devices with different voltages and different technical routes.

[0066] A new energy vehicle adopting the modular layout method of a pure electric commercial vehicle cabin as described in any one of claims 1 to 9.

[0067] We sorted out all the components and layout requirements that need to be arranged on the chassis of pure electric vehicles, adopted a system integration solution (integrated auxiliary machines, drive motor integrated MCU, battery frame integrated BMS), followed the single-layer flat layout solution, and made a new plan for the layout of the cabin module according to the high and low voltage harness and pipeline layout principles. At the same time, based on the principle of high and low voltage separation and pipeline separation of the whole vehicle, we redefined the position and direction of the high and low voltage interfaces of chassis accessories (including all-in-one integrated controllers, integrated auxiliary machines, etc.), and realized the high integration and modularization of chassis accessories and interfaces.

[0068] 1. Layout principle: Based on the functions of the systems and components arranged in the front section of the vehicle, the functions and interface positions of the cabin module are newly defined according to the principle of high and low voltage separation and single-layer layout. The cabin module is integrated and arranged according to the principle of proximity to the relative positions of the controller and its actuator. At the same time, the cabin module is designed and assembled according to a modular solution.

[0069] 2. Functional and structural integration: Adopt integrated auxiliary machines, battery frame integrated BMS and drive motor integrated MCU solutions. Considering the integrated layout, the vehicle is divided into "cabin module", "energy storage module" and "drive module". The cabin module integrates the layout of all-in-one integrated controller, low-voltage battery, integrated auxiliary machines, air conditioning compressor, air handling unit, air filter, etc. The accessories are highly integrated to make full use of the space at the bottom of the cab.

[0070] 3. Single-layer flat layout: Considering the convenience of maintenance and avoiding interference or obstruction of each accessory during maintenance, a "single-layer flat" layout idea is proposed based on the layout space at the bottom of the vehicle cab and the characteristics of new energy vehicles without engines. The limit boundaries of the cabin module and the size of chassis accessories are defined, and all controllers and accessories are arranged on the same layer and at the same height to ensure that there is no obstruction between the controllers and accessories above and below. At the same time, the positioning of the cab assembly is lowered to increase the internal space of the cab.

[0071] 4. Separation of high and low voltage: Considering electromagnetic compatibility, to avoid interference of low voltage by high voltage system during operation, the layout idea of ​​"separation of high and low voltage" is proposed, and the layout of left longitudinal beam 1 of high voltage wiring harness and right longitudinal beam 2 of low voltage wiring harness are defined to avoid electromagnetic interference from the root.

[0072] 5. Shortest path layout: Considering the layout of high-voltage wiring harness, low-voltage wiring harness, cooling pipeline and brake pipeline, a new layout of the cabin module is planned according to the layout principles of high- and low-voltage wiring harness and pipeline, and the "shortest path layout" principle is proposed to achieve a more reasonable and smooth layout and direction of high- and low-voltage wiring harness and pipeline, while shortening the length of the pipeline harness and reducing the cost of the whole vehicle.

[0073] 6. Integrated interface: The low-voltage wiring harness of the cabin module adopts an integrated solution, which newly defines the standardized interface of the cabin module low-voltage wiring harness and uses a highly integrated low-voltage connector to connect with the vehicle. Similarly, the brake line of the cabin module adopts a highly integrated multi-pass wall connector connection solution. Different models can use the same connector to connect with the cabin module accessories at a fixed position, which improves the modularity of the vehicle, reduces the variety of connectors, and improves the reliability of the vehicle.

[0074] 7. Modular overall assembly of the cabin: Based on the integrated layout of chassis accessories, wiring harness and pipeline integrated connection solutions, the cabin modules are assembled offline and packaged into a complete overall cabin module solution, breaking the current process of separate assembly of each component of new energy vehicles and improving the assembly efficiency of the entire vehicle.

[0075] Embodiment 1:

[0076] The air conditioning compressor is arranged above the front end of the left longitudinal beam 1 of the frame, the air filter is arranged on the outside of the front end of the right longitudinal beam 2 of the frame, and the remaining components are arranged in sequence from the opposite direction of the vehicle's travel, including a low-voltage battery and an air handling unit, an integrated auxiliary machine, and an all-in-one integrated controller.

[0077] Define the position and direction of the high and low voltage and cooling interfaces of the all-in-one integrated controller. The main positive, main negative and main drive high voltage interfaces are horizontally facing backwards, the auxiliary machine interface is horizontally facing left, and the low voltage wiring harness and cooling water inlet are horizontally facing right. When using the electric drive axle technology route, the high voltage main drive wiring harness enters the left longitudinal beam 1 of the frame through the shortest path, extends along the inner side of the left longitudinal beam 1 and connects to the electric drive axle MCU. When using the motor + AMT technology route, the main drive high voltage three-phase line is directly opposite to the three-phase line interface of the drive motor and is connected to the drive motor through the shortest path. The air-conditioning compressor is arranged on the left side of the frame, and the auxiliary drive high voltage wiring harness of the all-in-one integrated controller enters the left longitudinal beam 1 through the shortest path and is connected to high voltage components such as the air-conditioning compressor, integrated auxiliary machine, and PTC.

[0078] The low-voltage wiring harness of the cabin module adopts an integrated solution. Considering the configuration changes of different models and the functional expansion requirements of all-in-one integrated controllers, integrated auxiliary machines, air-conditioning compressors, air handling units, etc., a highly integrated 18-pin pin low-voltage connector is used to connect to the whole vehicle and is arranged on the right side of the integrated auxiliary machine. The wiring harnesses between the connector and the components are firmly fixed with brackets to ensure the assembly consistency of the entire cabin module.

[0079] Taking into account the differences in integrated auxiliary equipment for different drive types and configurations, and to be compatible with the expansion of subsequent functions, an eight-way integrated wall connector is selected. The connection between the wall connector and the integrated auxiliary equipment and the air handling unit is assembled and fixed offline. The wall connector is arranged on the left front side of the low-voltage battery, and the vehicle's brake air circuit is only connected to the wall connector fixed here.

[0080] The present invention is not limited to the above-mentioned implementation modes, and anyone should be aware of the structural changes made under the enlightenment of the present invention, and all those having the same or similar technical solutions as the present invention fall within the protection scope of the present invention.

[0081] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A modular layout method for a pure electric commercial vehicle cabin, characterized in that: The following steps are involved: S1. Define the principle of single-layer flat layout to install chassis accessories on the vehicle chassis frame; S2. Adopt the principle of high and low voltage separation to define the high voltage interface and low voltage interface of the controller; S3. Define the interface standardization principle and integrate the management of low-voltage wiring harness and brake line interfaces; S4. The installation adopts the overall sub-assembly scheme of the cabin module.

2. The modular layout method of a pure electric commercial vehicle cabin according to claim 1, characterized in that: The chassis accessories in step S1 include but are not limited to an all-in-one integrated controller, a low-voltage battery, an integrated auxiliary machine, an air handling unit, an air filter, and an air conditioning compressor.

3. The modular layout method of a pure electric commercial vehicle cabin according to claim 1, characterized in that: The single-layer flat layout principle in step S1 is as follows: in a left-hand vehicle model, the air-conditioning compressor is arranged above the front end of the left longitudinal beam of the frame, the air filter is arranged on the outside of the front end of the right longitudinal beam of the frame, and accessories such as the low-voltage battery and air handling unit, integrated auxiliary machine, and all-in-one integrated controller are arranged in a single layer with equal height. The low-voltage battery and air handling unit, integrated auxiliary machine, and all-in-one integrated controller are arranged in sequence from the opposite direction of the vehicle's travel according to the flow direction of the high-voltage path, and the high-voltage wiring harness path is arranged with the shortest path.

4. The modular layout method of a pure electric commercial vehicle cabin according to claim 1, characterized in that: The single-layer flat layout principle in step S1 in the right-hand vehicle model causes changes in the layout positions of air conditioning, steering, braking mechanisms, etc., which will adjust the direction of the low-voltage battery and integrated auxiliary machine of the cabin module, or swap the positions of the low-voltage battery, air filter, and air handling unit, or adjust the front and rear positions of each component.

5. The modular layout method of a pure electric commercial vehicle cabin according to claim 1, characterized in that: The controller in step S2 is an all-in-one integrated controller, which defines the position and direction of the high-pressure interface according to the arrangement of the accessory main drive and auxiliary drive and the high-pressure flow direction, and controls the separation of high and low pressures.

6. The modular layout method of a pure electric commercial vehicle cabin according to claim 5, characterized in that: The high and low voltage separation allows the high voltage line to be arranged on the left longitudinal beam, and the low voltage line and pipeline to be arranged on the right longitudinal beam, or the high voltage wire harness is arranged on the right longitudinal beam, and the low voltage wire harness and pipeline are arranged on the left longitudinal beam.

7. The modular layout method of a pure electric commercial vehicle cabin according to claim 1, characterized in that: The low-voltage wiring harness and brake line interface integrated management in step S3 is achieved through a highly integrated 18-pin low-voltage connector or an eight-way wall connector, which is used for standardized connection and modular packaging of wiring harnesses and pipelines.

8. The modular layout method of a pure electric commercial vehicle cabin according to claim 1, characterized in that: The cabin module in step S4 is integrally assembled at the bottom of the cab or arranged in the middle of the rear chassis of the cab.

9. The modular layout method of a pure electric commercial vehicle cabin according to claim 2, characterized in that: The different solutions of the all-in-one integrated controller include but are not limited to a four-in-one integrated controller, a five-in-one integrated controller, a six-in-one integrated controller, and an eight-in-one integrated controller.

10. A new energy vehicle adopting the modular layout method of the cabin of a pure electric commercial vehicle as described in any one of claims 1 to 9.

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