Battery replacement type tractor

Abstract

The invention discloses a battery replacing type tractor which comprises a frame assembly, a cab and a battery replacing system, the bottom face of the battery replacing system is lower than the frame assembly, meanwhile, the top face of the battery replacing system is arranged to be lower than the bottom edge of an observation position, and when traction operation of a container semitrailer is carried out, an operator is in the cab, and the observation position is arranged to be lower than the bottom edge of the observation position. The rearview auxiliary observation in the container semitrailer direction can be directly carried out through the observation position, the lifting operation of the auxiliary loading container on a wharf is reliably and rapidly carried out, the groove matched with the frame assembly is formed in the battery replacing system, and after the battery replacing system is assembled, the top of the battery replacing system is lower than the bottom edge of the observation position; the bottom face of the battery replacing system is lower than the frame assembly, on the premise that the battery replacing system does not shield an observation position, the energy supply capacity of the battery replacing system is kept to meet the set requirement, the operation safety and smoothness are improved, and the vehicle control difficulty is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of special operation vehicles, and in particular to a battery-swap tractor. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present disclosure. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present disclosure.

[0003] At present, the tractors used to transport containers and other goods in docks, steel mills and other areas are generally fuel-powered dock tractors with offset cabs, and some operating environments use rechargeable offset cab dock tractors. With the transformation of heavy-duty vehicles from fuel to clean energy, there is an increasing demand for the application of new energy vehicles in docks, steel mills and other scenarios. Among fuel-powered and rechargeable offset cab dock tractors, fuel vehicles do not meet the requirements of new energy transformation. At the same time, rechargeable offset cab tractors cannot meet the needs of rapid energy replenishment and high attendance of port operating vehicles due to the long charging time. In addition, there are battery-swap flat-head cab tractors, which use a rectangular battery-swap box located above the frame. At the same time, in order to increase the power, the top of the battery-swap box exceeds the upper edge of the rear window of the cab, which greatly reduces the rear view of the cab, affects the safety and smoothness of the operation, and increases the difficulty of vehicle control. Summary of the invention

[0004] In view of the defects existing in the prior art, the present application provides a battery-swap tractor to solve the problem of poor rear-view effect of the battery-swap tractor in the prior art.

[0005] The above-mentioned purpose of the present application is mainly achieved through the following technical solutions:

[0006] A battery-swap tractor, comprising:

[0007] A frame assembly, wherein the frame assembly has a towing position;

[0008] A cab, the cab is fixedly mounted on the frame assembly, and the cab is provided with an observation position arranged toward the towing position;

[0009] A battery exchange system is detachably arranged on the frame assembly and can be arranged between the cab and the traction position. A matching groove is provided on the side of the battery exchange system facing the frame assembly. When the battery exchange system is fixed on the frame assembly, the bottom surface of the battery exchange system is lower than the frame assembly, and the top surface of the battery exchange system is arranged lower than the bottom edge of the observation position.

[0010] In an optional embodiment, the battery-swapping tractor also includes a power system connected to the battery-swapping system, the power system including a synchronous motor, a transmission and a powertrain suspension, the synchronous motor is connected to the transmission, and the synchronous motor and the transmission are fixedly connected to the inner side of the frame assembly through the powertrain suspension.

[0011] In an optional embodiment, the battery exchange system includes a main body, a bracket, a power battery, a distribution box and a battery management system. The bracket can be detachably mounted on the frame assembly, and the main body can be detachably connected to the bracket. The power battery, the distribution box and the battery management system are electrically connected to each other and fixedly arranged on the main body, and the bracket is provided with a battery exchange connector connected to the power system. When the battery exchange system is arranged on the frame assembly, the power battery is electrically connected to the battery exchange connector.

[0012] In an optional embodiment, the battery-swap tractor further includes a thermal management system arranged on the frame assembly, and the thermal management system is used to adjust the operating temperature of the battery-swap system and the power system through heat exchange.

[0013] In an optional embodiment, the thermal management system includes a pump body, a radiator, and an expansion water tank. The pump body, the radiator, and the expansion water tank are respectively connected by pipelines and arranged at the front of the cab. An operating fluid is provided in the pipeline, and the pump body drives the operating fluid to circulate in the pipeline for heat exchange.

[0014] In an optional embodiment, the battery-swapping tractor further includes a steering system device respectively connected to the battery-swapping system and the power system, and the steering system device adopts an electric hydraulic power steering system.

[0015] In an optional embodiment, the battery-swapping tractor further includes a braking system device respectively connected to the battery-swapping system and the power system, and the braking system device adopts a dual-circuit air braking system.

[0016] In an optional embodiment, the frame assembly is arranged as a frame-type riveted frame, the frame assembly is made of a steel plate with a yield strength greater than 650 MPa, and the frame assembly includes a longitudinal beam with a height of not less than 300 mm.

[0017] In an optional embodiment, the battery-swapping tractor further includes a rear-view system provided on the frame assembly, wherein the rear-view system is arranged between the battery-swapping system and the traction position and is used to obtain image information at the traction position.

[0018] In an optional embodiment, the rearview system includes a display, a controller and a rearview camera, the rearview camera is fixed to the frame assembly via a mounting bracket, and the display and the controller are respectively arranged in the cab to connect and control the rearview camera.

[0019] Compared with the prior art, the advantages of this application are:

[0020] The battery-swap tractor in the present application includes a frame assembly, a cab and a battery-swap system. The frame assembly has a traction position, the cab is fixed on the frame assembly, and the cab is provided with an observation position arranged toward the traction position. The battery-swap system is detachably arranged on the frame assembly and can be arranged between the cab and the traction position. The battery-swap system is provided with a matching groove on one side of the frame assembly. When the battery-swap system is fixed on the frame assembly, the bottom surface of the battery-swap system is lower than the frame assembly, and the top surface of the battery-swap system is arranged lower than the bottom edge of the observation position. When towing a container semi-trailer, the operator in the cab can directly perform rear-view auxiliary observation in the direction of the container semi-trailer through the observation position, and assist in the lifting operation of the loaded container at the dock to be carried out reliably and quickly. By arranging grooves on the battery swap system that cooperate with the frame assembly, the top of the battery swap system can be lower than the bottom edge of the observation position after the battery swap system is assembled. By making the bottom surface of the battery swap system lower than the frame assembly, the energy supply capacity of the battery swap system can be maintained to meet the set requirements while keeping the battery swap system from blocking the observation position. The safety and smoothness of the operation are improved, and the difficulty of vehicle control is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A structural schematic diagram of a battery-swap tractor is provided for an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the structure of a battery-swapping tractor in operation is provided for an embodiment of the present application;

[0024] Figure 3 A structural schematic diagram of a frame assembly is provided for an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of the power system is provided for the embodiment of the present application;

[0026] Figure 5 Provide an assembly diagram of a battery swap system for an embodiment of the present application;

[0027] Figure 6 Provides a schematic diagram of the assembly of a thermal management system for an embodiment of the present application;

[0028] In the figure: 100, frame assembly; 200, cab; 201, observation position; 300, battery replacement system; 301, matching groove; 302, main body; 303, bracket; 304, power battery; 305, distribution box; 306, battery management system; 307, battery replacement connector; 400, power system; 401, synchronous motor; 402, transmission; 403, powertrain suspension; 500, thermal management system; 501, pump body; 502, radiator; 503, expansion tank; 601, steering system; 602, braking system; 700, rear view system; 800, container semi-trailer. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0030] like Figure 1 As shown, Figure 1 A structural schematic diagram of a battery-swap tractor is provided for an embodiment of the present application. The battery-swap tractor comprises a frame assembly 100, a cab 200 and a battery-swap system 300, wherein:

[0031] like Figure 1 , Figure 2 As shown, Figure 2 A structural schematic diagram of a battery-swap tractor in operation is provided for an embodiment of the present application. The tractor is a special vehicle specially designed for towing a semi-trailer. The tractor is usually used in special operation sites because it can tow trailers loaded with large amounts of cargo, greatly improving transportation efficiency.

[0032] like Figure 1 , Figure 2 As shown, the frame assembly 100 has a towing position, which is used to connect the container semi-trailer 800 and to tow the container semi-trailer 800 to move and transport in the working area.

[0033] like Figure 1 , Figure 2As shown, the cab 200 is fixed on the frame assembly 100, and the cab 200 is provided with an observation position 201 arranged toward the towing position. The operator performs control and driving operations in the cab 200, and the observation position 201 is provided on the side of the cab 200 facing the towing position. The operator can observe the container semi-trailer 800 and related environments through the observation position 201 in the cab 200, which is convenient for corresponding control and driving operation regulation and improves operation reliability and accuracy.

[0034] like Figure 1 , Figure 2 As shown, the battery exchange system 300 can be detachably arranged on the frame assembly 100, and can be arranged between the cab 200 and the towing position. The battery exchange system 300 is provided with a mating groove 301 on the side facing the frame assembly 100. When the battery exchange system 300 is fixed on the frame assembly 100, the bottom surface of the battery exchange system 300 is lower than the frame assembly 100, and the top surface of the battery exchange system 300 is arranged lower than the bottom edge of the observation position 201.

[0035] like Figure 1 , Figure 2 As shown, the battery swap system 300 provides the electric energy required for the operation of the battery swap tractor, and can replace the charging process through rapid disassembly and replacement, thereby increasing the effective operating time of the battery swap tractor and improving its utilization rate.

[0036] like Figure 1 , Figure 2 As shown, it should be noted that the bottom of the battery swap system 300 extends to the lower part of the frame assembly 100, and through the use of the lower space of the frame, while maintaining the energy supply capacity of the battery swap system 300 and even increasing the energy density of the battery swap system 300, the overall height of the battery swap system 300 is reduced to avoid the height of the battery swap system 300 encroaching on the field of view observed from the observation position 201 to the container semi-trailer 800.

[0037] In an optional embodiment, the working principle of the battery-swap tractor in the present application is that the battery-swap tractor includes a frame assembly 100, a cab 200 and a battery-swap system 300. The frame assembly 100 has a traction position, the cab 200 is fixed on the frame assembly 100, and the cab 200 is provided with an observation position 201 arranged toward the traction position. The battery-swap system 300 is detachably arranged on the frame assembly 100 and can be arranged between the cab 200 and the traction position. The battery-swap system 300 is provided with a mating groove 301 on one side facing the frame assembly 100. When the battery-swap system 300 is fixed on the frame assembly 100, the bottom surface of the battery-swap system 300 is lower than the frame assembly 100, and at the same time, the battery-swap system 30 0 is arranged so that the top surface of the battery swap system 300 is lower than the bottom edge of the observation position 201. When the container semi-trailer 800 is towing, the operator in the cab 200 can directly perform rear-view auxiliary observation in the direction of the container semi-trailer 800 through the observation position 201, so as to assist the lifting operation of the loaded container at the dock to be carried out reliably and quickly. By arranging a groove on the battery swap system 300 that cooperates with the frame assembly 100, the top of the battery swap system 300 can be lower than the bottom edge of the observation position 201 after the battery swap system 300 is assembled. By making the bottom surface of the battery swap system 300 lower than the frame assembly 100, the energy supply capacity of the battery swap system 300 can be kept to meet the set requirements while keeping the battery swap system 300 from blocking the observation position 201, thereby improving the safety and smoothness of the operation and reducing the difficulty of vehicle control.

[0038] like Figure 1 , Figure 3 as well as Figure 4 As shown, Figure 3 A structural schematic diagram of a frame assembly 100 is provided for an embodiment of the present application. Figure 4 A structural schematic diagram of the power system 400 is provided for an embodiment of the present application. In an optional implementation, the battery-swap tractor further includes a power system 400 connected to the battery-swap system 300, the power system 400 includes a synchronous motor 401, a transmission 402 and a powertrain suspension 403, the synchronous motor 401 is connected to the transmission 402, and the synchronous motor 401 and the transmission 402 are fixedly connected to the inner side of the frame assembly 100 via the powertrain suspension 403.

[0039] The synchronous motor 401 adopts a three-phase permanent magnet synchronous motor 401, and the transmission 402 adopts a mechanical automatic transmission 402. The three-phase permanent magnet synchronous motor 401 has the characteristics of large driving torque, high efficiency, and high control response accuracy; the mechanical automatic transmission 402 can adopt a 4-speed mechanical automatic transmission 402, and has the characteristics of large first gear ratio and high speed adaptation of the powertrain, and can also take into account the high load and large torque driving conditions in the operation area, as well as the high-speed driving conditions on the highway outside the port; the synchronous motor 401 provides power for the driving operation of the battery-swap tractor. The synchronous motor 401 can be connected to the transmission 402 by installing intermediate equipment such as bolts and clutches to realize power transmission. After the synchronous motor 401 and the transmission 402 are connected, they can be used as an integral mechanism and installed on the inner side of the frame assembly 100 through the powertrain suspension 403, providing relative structural protection for the power system 400 and maintaining operational reliability.

[0040] like Figure 1 , Figure 5 As shown, Figure 5 An assembly diagram of a battery exchange system 300 is provided for an embodiment of the present application. In an optional embodiment, the battery exchange system 300 includes a main body 302, a bracket 303, a power battery 304, a distribution box 305 and a battery management system 306. The bracket 303 can be detachably mounted on the frame assembly 100, and the main body 302 can be detachably connected to the bracket 303. The power battery 304, the distribution box 305 and the battery management system 306 are electrically connected to each other and fixedly arranged on the main body 302. A battery exchange connector 307 connected to the power system 400 is provided on the bracket 303. When the battery exchange system 300 is arranged on the frame assembly 100, the power battery 304 is electrically connected to the power exchange connector 307.

[0041] The main body 302 is installed on the frame assembly 100 in a straddle-mounted manner. The lower parts of both sides of the battery swap system 300 are located on both sides of the longitudinal beams in the frame assembly 100. The main body 302 is welded by multiple beams to form a saddle-shaped frame, which provides an installation basis for the components of the battery swap system 300. The outer surface of the main body 302 can be installed with a metal skin, an inspection door, etc. to improve the integrity, and heat dissipation holes can also be opened on the metal skin. The bracket 303 is installed on the upper plane of the frame assembly 100 through fasteners. The bracket 303 is provided with a battery swap connector 307 and a guide device for guiding the battery swap system 300 during the assembly process. The bracket 303 provides an installation and fixing basis for the battery swap system 300. The battery swap connector 307 is composed of a connector plug and a connector socket, which is used for power supply and communication connection between the battery swap system 300 and the tractor. The connector plug and the connector socket are located in relative positions, and under the guidance of the guide device, the connector plug and the connector socket can be adaptively calibrated and connected in relative position.

[0042] like Figure 1 , Figure 5 As shown, the power battery 304 is installed inside the main body 302 and is used to provide power for the battery-swap tractor to travel and other functions. The power distribution box 305 is installed inside the main body 302 to provide power distribution for the power battery 304. The battery management system 306 is installed inside the main body 302 to protect and manage the power battery 304. Its main functions include battery working status monitoring, battery protection control, charge and discharge control, remaining power and health status estimation, fault diagnosis and alarm.

[0043] like Figure 1 , Figure 3 as well as Figure 6 As shown, Figure 6 An assembly diagram of a thermal management system 500 is provided for an embodiment of the present application. In an optional embodiment, the battery-swap tractor further includes a thermal management system 500 arranged on the frame assembly 100, and the thermal management system 500 is used to adjust the operating temperature of the battery-swap system 300 and the power system 400 through heat exchange.

[0044] The thermal management system 500 is installed inside the main body 302. In actual layout, it can be configured as an integrated water cooling unit. The thermal management system 500 is mainly used to ensure that the power battery 304 is in the optimal temperature range during the charging and discharging process, prevent overheating and low-temperature preheating, so as to improve the charging and discharging efficiency of the power battery 304, extend the battery life and ensure vehicle safety.

[0045] like Figure 1 , Figure 3 as well as Figure 6 As shown, in an optional embodiment, the thermal management system 500 includes a pump body 501, a radiator 502, and an expansion water tank 503. The pump body 501, the radiator 502, and the expansion water tank 503 are respectively connected by pipelines and arranged in the front part of the cab 200. The pipeline is provided with an operating fluid, and the pump body 501 drives the operating fluid to circulate in the pipeline for heat exchange.

[0046] The thermal management system 500 dissipates heat for the power system 400. The pump body 501, the radiator 502, and the expansion water tank 503 can be installed on the middle front part of the frame assembly 100 by fasteners. The radiator 502 is configured as a water-cooled radiator 502 with a tube-belt structure, and has its own cooling fan. Heat exchange is performed through contact during air flow. The flow direction of the operating fluid during the flow and heat exchange process follows the principle of "flowing from components with small heat dissipation power requirements through components with large heat dissipation power requirements". When the pump body 501 drives the operating fluid cooled by the radiator 502, the operating fluid passes through the heat dissipation components in turn and then returns to the radiator 502 to form a cycle, so that the operating process has the characteristics of energy saving and high heat dissipation efficiency.

[0047] like Figure 1 , Figure 3 As shown, in an optional embodiment, the battery-swap tractor further includes a steering system device 601 connected to the battery-swap system 300 and the power system 400 respectively, and the steering system device 601 adopts an electric hydraulic power steering system.

[0048] like Figure 1 , Figure 3 As shown, in an optional embodiment, the battery-swap tractor further includes a brake system device 602 connected to the battery-swap system 300 and the power system 400 respectively, and the brake system device 602 adopts a dual-circuit air brake system.

[0049] The brake system device 602 is mainly equipped with an electric air compressor, an air handling unit, a four-line protection valve, an air reservoir, a brake master valve, an AEBS valve, an ABS pressure regulating valve, a brake air chamber, a hand brake valve, a trailer hand brake valve, a differential relay valve and connecting pipes. The components of the brake system device 602 are installed on the frame assembly 100 through corresponding brackets and fasteners. When one of the two circuits of the service brake fails, the other circuit can still work normally to ensure that the tractor can still obtain a certain braking performance and improve reliability.

[0050] like Figure 1 , Figure 3 As shown, in an optional embodiment, the frame assembly 100 is arranged as a frame-type riveted frame, and the frame assembly 100 is made of steel plates with a yield strength greater than 650 MPa, and the frame assembly 100 includes a longitudinal beam with a height of not less than 300 mm. In order to meet the requirements of load-traction transportation conditions in the port area, the steel plates with a yield strength greater than 650 MPa, through the structural arrangement of double-layer steel plates, are combined with a longitudinal beam height of not less than 300 mm, so that the frame assembly 100 has the characteristics of high structural strength, strong load-bearing capacity and good reliability.

[0051] like Figure 1 , Figure 2As shown, in an optional embodiment, the battery-swap tractor further includes a rear-view system 700 provided on the frame assembly 100, and the rear-view system 700 is arranged between the battery-swap system 300 and the traction position, and is used to obtain image information at the traction position.

[0052] On the premise of using the observation position 201 to observe the container semi-trailer 800 and the relevant environment, the rear-view system 700 can also be used to more accurately observe the detailed operation area, and the image information can be used to assist in obtaining the status in the detailed area, so as to cooperate with the observation position 201 more flexibly.

[0053] In an optional embodiment, the rearview system 700 includes a display, a controller and a rearview camera. The rearview camera is fixed to the frame assembly 100 via a mounting bracket. The display and the controller are respectively arranged in the cab 200 to connect and control the rearview camera, which is easy to control and convenient for operators to obtain and process information in the cab 200.

[0054] It should be understood that the terms first, second, etc. are only used to distinguish descriptions and should not be understood as indicating or suggesting relative importance. Although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit without departing from the scope of the exemplary embodiments of the present invention.

[0055] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another relationship between associated objects, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0056] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside" and the like indicate orientations or positional relationships that are customarily placed when the disclosed product is used, or are orientations or positional relationships that are customarily understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The terms used herein are only used to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates the opposite meaning. It should also be understood that the terms "include", "comprising", "including", and / or "comprising" when used herein specify the existence of the claimed features, integers, steps, operations, units, and / or components, and do not exclude the existence or increase of one or more other features, quantities, steps, operations, units, components, and / or their combinations.

[0059] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, it should be understood by those of ordinary skill in the art that the exemplary embodiments may be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid making the exemplary embodiments unclear.

[0060] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

[0061] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field.

Claims

1. A battery-swap tractor, characterized in that: The battery-swap tractor comprises: A frame assembly, wherein the frame assembly has a towing position; A cab, the cab is fixedly mounted on the frame assembly, and the cab is provided with an observation position arranged toward the towing position; A battery exchange system is detachably arranged on the frame assembly and can be arranged between the cab and the traction position. A matching groove is provided on the side of the battery exchange system facing the frame assembly. When the battery exchange system is fixed on the frame assembly, the bottom surface of the battery exchange system is lower than the frame assembly, and the top surface of the battery exchange system is arranged lower than the bottom edge of the observation position.

2. The battery-swap tractor according to claim 1, characterized in that: The battery-swapping tractor also includes a power system connected to the battery-swapping system, the power system including a synchronous motor, a transmission and a powertrain suspension, the synchronous motor is connected to the transmission, and the synchronous motor and the transmission are fixedly connected to the inner side of the frame assembly through the powertrain suspension.

3. The battery-swap tractor according to claim 2, characterized in that: The battery exchange system includes a main body, a bracket, a power battery, a distribution box and a battery management system. The bracket can be detachably mounted on the frame assembly, and the main body can be detachably connected to the bracket. The power battery, the distribution box and the battery management system are electrically connected to each other and fixedly arranged on the main body. The bracket is provided with a battery exchange connector connected to the power system. When the battery exchange system is arranged on the frame assembly, the power battery is electrically connected to the battery exchange connector.

4. The battery-swap tractor according to claim 3, characterized in that: The battery-swap tractor also includes a thermal management system arranged on the frame assembly, and the thermal management system is used to adjust the operating temperature of the battery-swap system and the power system through heat exchange.

5. The battery-swap tractor according to claim 4, characterized in that: The thermal management system includes a pump body, a radiator, and an expansion water tank. The pump body, the radiator, and the expansion water tank are respectively connected by pipelines and arranged in the front part of the cab. The pipelines are provided with an operating fluid, and the pump body drives the operating fluid to circulate in the pipelines for heat exchange.

6. The battery-swap tractor according to claim 2, characterized in that: The battery-swapping tractor also includes a steering system device connected to the battery-swapping system and the power system respectively, and the steering system device adopts an electric hydraulic power steering system.

7. The battery-swap tractor according to claim 2 or 6, characterized in that: The battery-swapping tractor also includes a brake system device connected to the battery-swapping system and the power system respectively, and the brake system device adopts a dual-circuit air brake system.

8. The battery-swap tractor according to claim 1, characterized in that: The frame assembly is arranged as a frame-type riveted frame, the frame assembly is made of a steel plate with a yield strength greater than 650 MPa, and the frame assembly includes a longitudinal beam with a height of not less than 300 mm.

9. The battery-swap tractor according to claim 1, characterized in that: The battery-swapping tractor also includes a rear-view system provided on the frame assembly. The rear-view system is arranged between the battery-swapping system and the traction position and is used to obtain image information at the traction position.

10. The battery-swap tractor according to claim 9, characterized in that: The rearview system includes a display, a controller and a rearview camera. The rearview camera is fixed to the frame assembly via a mounting seat. The display and the controller are respectively arranged in the cab to connect and control the rearview camera.

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