Modular arrangement structure of chassis of pure electric heavy truck

Abstract

The utility model relates to the technical field of new energy commercial vehicle chassis, and particularly discloses a pure electric heavy truck chassis modular arrangement structure which comprises a cabin module, a middle module and a rear module, the cabin module is provided with a motor cooling module and a cabin integration module, and the cabin integration module is provided with a cabin integration support. A low-voltage lithium battery, an air processing unit, an integrated auxiliary machine, an all-in-one controller and a pipeline plug fixing plate are installed on the cabin integrated support. The middle module is provided with a frame of a battery replacing vehicle type or a frame of a charging vehicle type; the rear module is provided with an electric drive axle and a rear suspension; the cabin module arrangement scheme is high in integration degree, universal arrangement of platform vehicle models is achieved, off-line split charging and on-line integral hoisting of the cabin module can be achieved when a whole vehicle is assembled, production and assembly efficiency is greatly improved, the frequency of electromagnetic compatibility faults such as error frame messages and abnormal high voltage falling caused by interference of high-voltage and low-voltage signals is reduced, and the reliability of the whole vehicle is improved. And product reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy commercial vehicle chassis technical field, concretely relates to a pure electric heavy truck chassis modularization arrangement structure. BACKGROUND

[0002] At present stage, the pure electric heavy truck adopts independent electric power steering and electric air compressor, lead-acid low-voltage storage battery and independent motor controller, the number of chassis accessories is large, the total arrangement scheme does not arrange the position of each assembly according to the route of vehicle driving energy flow, and the accessory arrangement of different vehicle types is redesigned according to the arrangement boundary.

[0003] At present stage, the pure electric heavy truck chassis accessory integration degree is low, and the modularization arrangement is not realized, so that the types and number of parts are large, and the cost investment and implementation difficulty are large in the stages of product development, verification, maintenance and maintenance. The current chassis arrangement scheme mainly arranges the multi-in-one controller, motor controller and electric air compressor in the form of three layers of stacking up and down, which needs to consume more working hours in the product loading stage and maintenance stage, and the convenience is poor. At the same time, the high and low voltage wire harness, cooling and braking pipeline of the whole vehicle are not planned in a positive way, so that the product high and low voltage is arranged staggered, the electromagnetic compatibility problem occurs frequently, the pipeline design cannot be divided according to the module, the design state is multiple, and errors are easy to occur.

[0004] Therefore, it is necessary to invent a pure electric heavy truck chassis accessory high integration, pipeline positive planning modularization chassis arrangement scheme to solve the problems of low chassis accessory integration degree, high-voltage controller and electric air compressor stacking arrangement, and high and low voltage wire harness and pipeline direction confusion. CONTENT OF UTILITY MODEL

[0005] In view of the problems in the prior art, the purpose of the utility model is to provide a pure electric heavy truck chassis modularization arrangement structure, which is divided into a cabin module, a middle module and a rear module to realize the modularization arrangement of platform vehicle types. In the aspect of chassis accessory integration, integrated auxiliary machines are adopted to realize the integration of electric power steering and electric air compressor motors, 24V lithium batteries are used to replace original lead-acid batteries, the motor controller is integrated with the motor, the overall chassis accessory arrangement space requirement is greatly reduced, the self weight and cost of the whole vehicle are reduced, the integrated auxiliary machines, low-voltage lithium batteries and multi-in-one controllers are arranged in a flat form in the cabin module, offline assembly is completed through module assembly, and the product assembly and maintenance convenience is improved. The direction of high and low voltage wire harness, cooling and braking pipeline is defined in a positive way, the form and position of multi-in-one controller connector are defined according to the requirement, the high and low voltage wire harness is arranged separately, the cooling and braking pipeline is smooth, and the fixation is reliable.

[0006] The utility model discloses a technical scheme that solves its technical problems is: a kind of pure electric heavy truck chassis modularization arrangement structure, including cabin module, middle module and rear module, the cabin module is arranged with motor cooling module and cabin integrated module, cabin integrated support is equipped in cabin integrated module, low-voltage lithium battery, air handling unit, integrated auxiliary machine, multi-in-one controller, pipeline plug fixing plate are installed on cabin integrated support;

[0007] Middle module arranges the frame of battery swap vehicle type or the frame of charging vehicle type;

[0008] Rear module arranges electric drive axle and rear suspension.

[0009] Preferably, the motor cooling module is symmetrically installed on both sides of the suspension, and the suspension is installed on the front end accessory on both sides of the vehicle frame.

[0010] Preferably, the low-voltage lithium battery and the air handling unit are fixed side by side on the cabin integrated support, the brake pipeline connected to the air handling unit is fixed by the independent pipeline plug fixing plate, and the pipeline plug fixing plate is directly plugged with the brake pipeline laid on the chassis.

[0011] Preferably, a battery cooling unit is installed on the cabin integrated support of the charging vehicle type, and the battery cooling unit is arranged below the multi-in-one controller.

[0012] Preferably, the frame of the battery swap vehicle type is installed at the rear of the cab, and the frame of the battery swap vehicle type is internally arranged with a power battery, a BMS junction box and a power battery cooling unit.

[0013] Preferably, the frame of the charging vehicle type is installed at the middle and both sides of the vehicle frame, the power battery is installed in the frame of the charging vehicle type, the BMS junction box is installed on the frame of the charging vehicle type, and the BMS junction box is located in front of the power battery.

[0014] Preferably, the electric drive axle is installed on the rear suspension, the rear drive axle of the electric drive axle is integrated with an MCU, and the MCU of the electric drive axle is provided with a DC bus interface, a low-voltage integrated interface and a cooling pipeline interface.

[0015] Preferably, the DC bus interface is connected to a high-voltage wire harness, the high-voltage wire harness is laid along the left longitudinal beam of the vehicle frame, the low-voltage integrated interface is connected to a low-voltage wire harness, the cooling pipeline interface is connected to a cooling pipeline, and the low-voltage wire harness and the cooling pipeline are laid along the right longitudinal beam of the vehicle frame.

[0016] The utility model has the following beneficial effects:

[0017] The pure electric heavy truck chassis modularization arrangement structure designed by the utility model adopts advanced assembly schemes such as low-voltage lithium battery, integrated auxiliary machine and motor integrated MCU, and the whole vehicle has obvious effects of weight reduction and cost reduction.

[0018] The pure electric heavy truck chassis modular arrangement structure designed in the utility model has high integration degree of the cabin module arrangement scheme, can realize general arrangement of platform vehicle types, can realize off-line sub-assembly of the cabin module and on-line overall hoisting during vehicle assembly, and greatly improves production and assembly efficiency.

[0019] The pure electric heavy truck chassis modular arrangement structure designed in the utility model arranges high-voltage and low-voltage pipelines according to the principle of high-low separation, plans high-voltage and low-voltage wire harness and cooling pipeline arrangement and fixing modes, reduces the occurrence frequency of electromagnetic compatibility faults such as error frame messages and abnormal high-voltage drop caused by high-voltage and low-voltage signal interference, and improves product reliability.

[0020] The pure electric heavy truck chassis modular arrangement structure designed in the utility model divides the whole vehicle into a cabin module, a middle module and a rear module, realizes standardized design of single module interfaces, can realize platform generalization and product quality consistency guarantee, reduces the types of parts and components, and simplifies vehicle assembly process. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a chassis overall arrangement structure diagram of the pure electric heavy truck chassis modular arrangement structure battery swap vehicle type.

[0022] Figure 2 is a chassis overall arrangement structure diagram of the pure electric heavy truck chassis modular arrangement structure battery charging vehicle type.

[0023] Figure 3 is a cabin module arrangement structure diagram of the battery swap vehicle type.

[0024] Figure 4 is a cabin module arrangement structure diagram of the battery charging vehicle type.

[0025] Figure 5 is a middle module arrangement structure diagram of the battery swap vehicle type.

[0026] Figure 6 is a middle module arrangement structure diagram of the battery charging vehicle type.

[0027] Figure 7 is a rear module arrangement structure diagram of the pure electric heavy truck chassis modular arrangement structure.

[0028] Figure 8 is a high-voltage wire harness, low-voltage wire harness and cooling pipeline arrangement structure diagram.

[0029] In the figure: 1-motor cooling module; 2-suspension; 3-front end accessory; 4-cabin integrated module; 5-low-voltage lithium battery; 6-air handling unit; 7-integrated auxiliary machine; 8-multi-in-one controller; 9-pipeline plug fixing plate; 10-battery cooling unit; 11-frame; 12-BMS junction box; 13-power battery; 14-electric drive axle; 15-rear suspension; 16-high-voltage wire harness; 17-low-voltage wire harness; 18-cooling pipeline. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be further clearly and completely explained in combination with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] The key terms defined in the utility model relate to:

[0032] Multi-in-one controller: high-voltage controller integrating DC-DC, electric steering (DC-AC), electric air compressor (DC-AC), high-voltage power distribution (PDU) functions.

[0033] Integrated auxiliary machine: auxiliary machine assembly adopting the same driving motor for electric steering oil pump and electric air compressor.

[0034] Electric drive assembly: driving assembly integrated by driving motor, speed change mechanism and motor controller (MCU).

[0035] 1. Cabin module arrangement:

[0036] The cabin module is arranged in the lower space of the cab, the cabin integrated support is fixed to the inner side of the left and right longitudinal beams of the frame through the suspension with rubber damping, the motor cooling module is arranged at the front end of the frame, the types of accessories of the rear back battery swap vehicle type and the charging vehicle type are slightly different, and the cabin module is planned synchronously.

[0037] Battery swap vehicle type: 24V low-voltage lithium battery 5, air handling unit 6 (APU), integrated auxiliary machine 7 and multi-in-one controller 8 are fixed in single layer from front to back on the cabin integrated support.

[0038] Charging vehicle type: on the basis of the arrangement of the battery swap vehicle type, the battery cooling unit 10 is arranged below the multi-in-one controller 8.

[0039] 2. Middle module arrangement:

[0040] The middle module refers to the chassis space from the rear wall of the cab to the front part of the electric drive axle 14, and the power battery 13 and the BMS junction box 12 are arranged.

[0041] Battery swap vehicle type: the power battery is arranged behind the rear wall of the cab rear wall and above the upper surface of the frame. The BMS terminal box and the battery cooling are arranged inside the power battery frame 11 to realize modular arrangement.

[0042] Charging vehicle type: the power battery 13 is arranged in a side and middle position, and the BMS terminal box 12 is arranged in front of the power battery 13, and the frame is in the middle.

[0043] 3. Rear module arrangement:

[0044] The rear module refers to the chassis space from the electric drive axle 14 to the tail of the vehicle. The arrangement of the electric drive axle 14 and the rear suspension 15 is consistent in the battery swap vehicle type and the charging vehicle type. In combination with the pipeline bundle arrangement plan, the interfaces of the electric drive axle high and low voltage, braking and cooling are defined in a positive way, and the standard connection mode of the electric drive axle and the rear suspension is defined, so that a unified arrangement plan can be realized for different vehicle types and different suspension forms.

[0045] As shown in Figures 1-8 , a modular arrangement structure of a pure electric heavy truck chassis includes a cabin module, a middle module and a rear module. The cabin module is arranged with a motor cooling module 1 and a cabin integrated module 4. The motor cooling module 1 is symmetrically installed on both sides of the suspension 2, and the suspension 2 is installed on the front end accessory 3 on both sides of the frame. The cabin integrated module 4 is provided with a cabin integrated support, and the low-voltage lithium battery 5, the air treatment unit 6, the integrated auxiliary machine 7, the multi-in-one controller 8 and the pipeline plug fixing plate 9 are installed on the cabin integrated support.

[0046] The low-voltage lithium battery 5 and the air treatment unit 6 are fixed side by side on the cabin integrated support. The brake pipeline connected with the air treatment unit 6 is fixed by the independent pipeline plug fixing plate 9, so as to realize the offline disassembly of the cabin integrated module and the installed accessories, and the pipeline plug fixing plate 9 is directly plugged with the brake pipeline laid on the chassis. The brake pipeline connected with the air treatment unit 6 is reserved by the pipeline plug fixing plate 9, and is plugged with the brake pipeline laid on the chassis during vehicle assembly, so as to realize the offline disassembly of the cabin integrated module and the overall hoisting on line.

[0047] As shown in Figure 4 , the battery cooling unit 10 is installed on the cabin integrated support of the charging vehicle type, and the battery cooling unit 10 is arranged below the multi-in-one controller 8.

[0048] The middle module arranges the frame 11 of the battery swap vehicle type or the frame of the charging vehicle type. As shown in Figure 5 , the middle module arrangement scheme of the battery swap vehicle type: the frame 11 of the battery swap vehicle type is installed at the rear of the cab, and the power battery, the BMS terminal box and the power battery cooling unit are arranged inside the frame 11 of the battery swap vehicle type. As shown in Figure 6As shown, the module layout scheme of the charging vehicle is as follows: the frame of the charging vehicle is installed in the middle and on both sides of the vehicle frame, the power battery 13 is installed inside the frame of the charging vehicle, and the BMS junction box 12 is installed on the vehicle frame of the charging vehicle, with the BMS junction box 12 located in front of the power battery 13.

[0049] like Figure 7 As shown, the rear module houses the electric drive axle 14 and the rear suspension 15. The electric drive axle 14 is mounted on the rear suspension 15. The rear drive axle of the electric drive axle 14 integrates an MCU. The MCU of the electric drive axle 14 is designed in a forward-looking manner according to the principle of high and low voltage separation of the whole vehicle, and is equipped with a DC bus interface, a low voltage integrated interface, and a cooling pipe interface.

[0050] like Figure 8 As shown, the DC bus interface is connected to the high-voltage harness 16, which is laid along the left longitudinal beam of the vehicle frame. The low-voltage integrated interface is connected to the low-voltage harness 17, and the cooling pipe interface is connected to the cooling pipe 18. The low-voltage harness 17 and the cooling pipe 18 are laid along the right longitudinal beam of the vehicle frame, achieving a separation of high and low voltage, reducing the frequency of electromagnetic compatibility problems, and improving the reliability of the entire vehicle.

[0051] This utility model is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model.

[0052] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A modular layout structure for a pure electric heavy-duty truck chassis, characterized in that, It includes a cabin module, a middle module and a rear module. The cabin module is equipped with a motor cooling module (1) and a cabin integration module (4). The cabin integration module (4) is equipped with a cabin integration bracket. The cabin integration bracket is equipped with a low-voltage lithium battery (5), an air handling unit (6), an integrated auxiliary machine (7), an all-in-one controller (8), and a pipeline plug fixing plate (9). The middle module houses the frame of either the battery-swapping vehicle or the charging vehicle. The rear module houses the electric drive axle (14) and the rear suspension (15).

2. The modular layout structure of the pure electric heavy-duty truck chassis according to claim 1, characterized in that, The motor cooling module (1) is symmetrically mounted with suspension mounts (2) on the left and right sides, and the suspension mounts (2) are mounted on the front end accessories (3) on the left and right sides of the frame.

3. The modular layout structure of the pure electric heavy-duty truck chassis according to claim 1, characterized in that, The low-voltage lithium battery (5) and the air handling unit (6) are fixed side by side on the integrated bracket of the cabin. The brake line connected to the air handling unit (6) is integrated and fixed by an independent pipe plug fixing plate (9). The pipe plug fixing plate (9) is directly plugged into the brake line laid on the chassis.

4. The modular layout structure of the pure electric heavy-duty truck chassis according to claim 1, characterized in that, The battery cooling unit (10) is installed on the integrated bracket in the engine compartment of the charging vehicle and is located below the all-in-one controller (8).

5. The modular layout structure of the pure electric heavy-duty truck chassis according to claim 1, characterized in that, The frame (11) of the battery swapping vehicle is installed at the rear of the cab. The power battery, BMS junction box and power battery cooling unit are integrated inside the frame (11) of the battery swapping vehicle.

6. The modular layout structure of the pure electric heavy-duty truck chassis according to claim 1, characterized in that, The frame of the charging vehicle is installed in the middle and on both sides of the vehicle frame. The power battery (13) is installed inside the frame of the charging vehicle. The BMS junction box (12) is installed on the frame of the charging vehicle. The BMS junction box (12) is located in front of the power battery (13).

7. The modular layout structure of the pure electric heavy-duty truck chassis according to claim 1, characterized in that, The electric drive axle (14) is mounted on the rear suspension (15). The rear drive axle of the electric drive axle (14) integrates an MCU. The MCU of the electric drive axle (14) is provided with a DC bus interface, a low-voltage integrated interface and a cooling pipe interface.

8. The modular layout structure of the pure electric heavy-duty truck chassis according to claim 7, characterized in that, The DC bus interface is connected to the high-voltage harness (16), which is laid along the left longitudinal beam of the frame. The low-voltage integrated interface is connected to the low-voltage harness (17), and the cooling pipe interface is connected to the cooling pipe (18). The low-voltage harness (17) and the cooling pipe (18) are laid along the right longitudinal beam of the frame.

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