Power framework of heavy-load electric tractor

Abstract

The invention relates to a power framework of a heavy-load electric tractor. The power framework is characterized by comprising a battery module group, a motor unit, a motor unit controller, a central control box and a combined controller, according to the heavy-load electric tractor power framework formed by the battery module group, the motor unit, the motor unit controller, the central control box and the combined controller, the power framework is provided with a gear shifting function, and the mode that a common electric vehicle does not have the gear shifting function is replaced; the reversing performance of the tractor is better and quicker; and a pneumatic system is used for braking, so that the braking time of the tractor is shorter, and the braking effect is stronger.

Description

Technical Field

[0001] The present invention relates to the field of heavy-load electric vehicles, and in particular to a power structure of a heavy-load electric tractor. Background Art

[0002] Electric vehicles usually use batteries as energy sources, and convert electrical energy into mechanical energy through controllers, motors and other components. The first electric vehicle was manufactured in 1834. Today, electric vehicles have undergone tremendous changes and are of various types, widely used in electric bicycles, electric motorcycles, electric tricycles, electric cars, large electric vehicles, etc.

[0003] Electric vehicles have been widely popularized for their environmental protection and convenience. As the market scale expands, the electric vehicle market is also increasingly segmented, and users' demands for electric vehicles are becoming more personalized. Among them, long driving range and strong carrying capacity are the concerns of many users, especially commercial users. In order to strive for high strength, long driving range and stable navigation of electric vehicles, the power structure of heavy-duty electric tractors has become a top priority.

[0004] As disclosed in Chinese Patent 201510262404.2, a method and controller for controlling multiple motors of an electric vehicle is provided. The method is characterized in that: the electric vehicle is provided with a controller, and the controller controls the number of motor starts by the motor current of the electric vehicle. The controller includes a throttle sampling module, a reversing sampling module, a brake sampling module, a current sampling module, a main control chip circuit, a motor drive module and a motor commutation module, and the motor drive module and the motor commutation module are matched with each motor as a group; the throttle sampling module includes a start instruction and an acceleration signal sampling; the reversing signal collected by the reversing sampling module acts on the motor commutation module through the main control chip circuit to complete the motor reversal control; the current sampling module collects the sum of the currents of all motors; the control method and the preset value are automatically executed by brushing into the main control chip circuit through software. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a heavy-duty electric tractor power structure with a shifting function, reversing through a hydraulic system and braking through a pneumatic system, and an overall reasonable design.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a heavy-duty electric tractor power structure, the innovation of which is: comprising a battery module group, a motor unit, a motor unit controller, a central control box and a combined controller;

[0007] The battery module groups are connected in series; the output end of the battery module group is connected to the central control box;

[0008] The central control box is provided with a battery management system, and the central control box is provided with a fast charging interface; the battery management system is connected to the combiner controller; the central control box is also connected to the motor unit controller;

[0009] The combined controller includes a steering oil pump controller, a brake air pump controller and a DC converter; the steering oil pump controller, the brake air pump controller and the DC converter are arranged in parallel in the combined controller; the combined controller also forms a feedback network with the motor unit controller;

[0010] The motor unit controller is connected to the motor unit, and is provided with an accelerator pedal interface, a brake pedal interface, a gear conversion interface and a water pump control interface; the accelerator pedal interface, the brake pedal interface, the gear conversion interface and the water pump control interface are connected to the accelerator pedal, the brake pedal, the gear and the water pump respectively;

[0011] The power battery train set is provided with a manual maintenance switch;

[0012] The central control box is also provided with an electric air conditioner;

[0013] The motor unit is also connected to a clutch, and the motor unit is connected to the rear wheel of the heavy-duty electric tractor through a reducer;

[0014] Furthermore, the battery management system is provided with a BMS mainboard, a positive contactor, a pre-charging relay, a pre-charging resistor and a battery charging contactor.

[0015] The advantages of the present invention are:

[0016] 1) The heavy-duty electric tractor power structure formed by the battery module group, the motor unit, the motor unit controller, the central control box and the combined controller in the present invention is provided with a gear shifting function to replace the general electric vehicle without a gear shifting function. At the same time, the hydraulic system is used for reversing, so that the reversing performance of the tractor is better and faster; the pneumatic system is used for braking, so that the braking time of the tractor is shorter and the braking effect is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 The invention discloses a power structure of a heavy-duty electric tractor. DETAILED DESCRIPTION

[0019] The following embodiments can enable those skilled in the art to more fully understand the present invention, but the present invention is not limited to the scope of the embodiments.

[0020] like Figure 1 A power architecture of a heavy-duty electric tractor shown includes a battery module group 1, a motor unit 2, a motor unit controller 3, a central control box 4 and a combined controller 5.

[0021] The battery module groups 1 are connected in series; the output end of the battery module group 1 is connected to the central control box 4 .

[0022] A battery management system 6 is arranged in the central control box 4 , and a fast charging interface 7 is arranged on the central control box 4 ; the battery management system 6 is connected to the combiner controller 5 ; and the motor unit controller 3 is also connected to the central control box 4 .

[0023] The combined controller 5 includes a steering oil pump controller 51, a brake air pump controller 52 and a DC converter 53; the steering oil pump controller 51, the brake air pump controller 52 and the DC converter 53 are arranged in parallel in the combined controller 5; the combined controller 5 also forms a feedback network with the motor unit controller 3.

[0024] The motor unit controller 3 is connected to the motor unit 2, and the motor unit controller is provided with an accelerator pedal interface, a brake pedal interface, a gear conversion interface and a water pump control interface; the accelerator pedal interface, the brake pedal interface, the gear conversion interface and the water pump control interface are respectively connected to the accelerator pedal 31, the brake pedal 32, the gear 33 and the water pump 34.

[0025] The power battery train set 1 is provided with a manual maintenance switch 11 .

[0026] The central control box 4 is also provided with an electric air conditioner 41 .

[0027] The motor unit 2 is also connected to a clutch, and the motor unit 2 is connected to the rear wheels of the heavy-duty electric tractor through a reducer.

[0028] The battery management system 6 is provided with a BMS mainboard, a positive contactor, a pre-charge relay, a pre-charge resistor and a battery charging contactor.

[0029] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A heavy-duty electric tractor power structure, characterized by: It includes a battery module group, a motor unit, a motor unit controller, a central control box and a combined controller; The battery module groups are connected in series; the output end of the battery module group is connected to the central control box; The central control box is provided with a battery management system, and the central control box is provided with a fast charging interface; the battery management system is connected to the combiner controller; the central control box is also connected to the motor unit controller; The combined controller includes a steering oil pump controller, a brake air pump controller and a DC converter; the steering oil pump controller, the brake air pump controller and the DC converter are arranged in parallel in the combined controller; the combined controller also forms a feedback network with the motor unit controller; The motor unit controller is connected to the motor unit, and is provided with an accelerator pedal interface, a brake pedal interface, a gear conversion interface and a water pump control interface; the accelerator pedal interface, the brake pedal interface, the gear conversion interface and the water pump control interface are connected to the accelerator pedal, the brake pedal, the gear and the water pump respectively; The power battery train set is provided with a manual maintenance switch; The central control box is also provided with an electric air conditioner; The motor unit is also connected with a clutch, and the motor unit is connected with the rear wheel of the heavy-load electric tractor through a reducer.

2. A heavy-duty electric tractor power structure according to claim 1, characterized in that: The battery management system is provided with a BMS mainboard, a positive electrode contactor, a pre-charging relay, a pre-charging resistor and a battery charging contactor.

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