CN216886230U

CN216886230U - Four-wheel drive control system of double-motor-driven pure electric loader

Info

Publication number: CN216886230U
Application number: CN202123115462.2U
Authority: CN
Inventors: 刘吉顺; 陈方明; 邱德波; 代为彬
Original assignee: Burleton Technology Co ltd
Current assignee: Bureton Technology Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-07-05
Anticipated expiration: 2031-12-13

Abstract

The utility model discloses a four-wheel drive control system of a double-motor-driven pure electric loader, which comprises a first drive axle and a second drive axle, wherein the first drive axle and the second drive axle are used for driving wheels, the first drive axle and the second drive axle are respectively driven by a first drive motor and a second drive motor, and the first drive motor and the second drive motor are connected with different motor controllers. The motor controller comprises a motor controller I and a motor controller II, and the motor controller I and the motor controller II are both in communication connection with and controlled by the vehicle control unit. The structure of the utility model cancels all gearboxes and traditional parts such as an engine, a clutch and the like, realizes the optimal four-wheel drive stepless speed change without the gearboxes, and the vehicle control unit is used as the brain of the whole vehicle to control two driving motors in real time according to the comprehensive information such as load, intention of a driver, energy saving requirement of the whole vehicle and the like, thereby greatly improving the comprehensive performances such as the work response speed, energy consumption and the like of the loader, having simple structure and convenient installation and also greatly improving the reliability of the whole vehicle.

Description

Four-wheel drive control system of double-motor-driven pure electric loader

Technical Field

The utility model belongs to the technical field of loaders, and particularly relates to a four-drive control system of a dual-motor-driven pure electric loader.

Background

The loader is used for loading, unloading, pushing, construction and other operations of bulk materials such as soil, gravel, coal and the like, and is widely applied to various construction places. At present, a great deal of wheel loader drive control systems adopt power for an internal combustion engine, and a transmission device adopts hydraulic transmission and mainly comprises an engine, a torque converter, a power shift transmission, a transmission shaft, a drive axle and the like. The technology of the power transmission system in the mode is mature, and the engine is mainly a diesel engine. With the development of the electric automobile industry in recent years, a loader with an electric motor as a power source slowly appears, but the loader with the traditional diesel engine or the emerging electric motor as a core realizes four-wheel drive through a gearbox or a series motor, so that the problems of complex system and excessive fault points exist.

And (5) retrieving. The Chinese utility model patent: a series double-motor power system (application No. CN202011528093.7, application date 2020.12.22) comprises a front drive axle, a front axle transmission shaft, a front drive motor, a middle connecting piece, a rear drive motor, a rear axle transmission shaft, a rear drive axle, a front drive motor controller, a rear drive motor controller and a whole vehicle controller, one end of the front axle transmission shaft is connected with the front drive axle, the other end is connected with the front drive motor, one end of the rear axle transmission shaft is connected with the rear drive axle, the other end is connected with the rear drive motor, two ends of the middle connecting piece are respectively connected with the front driving motor and the rear driving motor, the front driving motor controller is connected with the front driving motor, the rear driving motor controller is connected with the rear driving motor, and the vehicle control unit is connected with the front driving motor controller and the rear driving motor controller. However, the application has the defects that the two motors are connected through the middle transmission shaft, the system complexity and fault points are increased, the two ends of the motors are required to be connected with the transmission shafts, and the assembly is difficult.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to solve the problems of complex system and excessive fault points of the existing four-wheel drive structure.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

according to the utility model

A control system of a dual-motor-driven pure electric loader comprises a first drive axle and a second drive axle, wherein the first drive axle and the second drive axle are used for driving wheels, and are respectively driven by a first drive motor and a second drive motor which are connected with different motor controllers; the motor controller comprises a first motor controller and a second motor controller, wherein the first motor controller and the second motor controller are both in communication connection with and controlled by the whole vehicle controller, and the battery management system is simultaneously electrically connected with the first motor controller, the second motor controller and the whole vehicle controller.

Preferably, the power battery is in communication connection with the battery management system and is electrically connected with the first motor controller and the second motor controller.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

the utility model discloses a four-wheel drive control system of a double-motor-driven pure electric loader, which comprises a first drive axle and a second drive axle, wherein the first drive axle and the second drive axle are used for driving wheels, the first drive axle and the second drive axle are respectively driven by a first drive motor and a second drive motor, and the first drive motor and the second drive motor are connected with different motor controllers. The motor controller comprises a motor controller I and a motor controller II, and the motor controller I and the motor controller II are both in communication connection with and controlled by the vehicle control unit. The four-wheel drive structure of the utility model cancels all gearboxes and traditional components such as an engine, a clutch and the like, realizes the optimal four-wheel drive stepless speed change without gearboxes, and the whole vehicle controller is used as the brain of the whole vehicle, controls two driving motors in real time according to the comprehensive information such as load, intention of a driver, energy saving requirement of the whole vehicle and the like, can greatly improve the comprehensive performances such as the work response speed, energy consumption and the like of a loader, particularly the oil consumption of the whole vehicle, has simple structure and convenient installation, and also greatly improves the reliability of the whole vehicle.

Drawings

FIG. 1 is a schematic structural diagram of a four-wheel drive system of a dual-motor-drive pure electric loader according to the present invention;

FIG. 2 is a control logic block diagram of embodiment 1;

FIG. 3 is a flowchart of calculation of total driving torque according to embodiment 1;

FIG. 4 is a schematic diagram of a calculation process of the optimum system efficiency of example 1;

fig. 5 shows correction coefficient cases for different vehicle loads in example 1.

The reference numerals in the schematic drawings illustrate:

100. a wheel; 210. a first drive axle; 220. a second drive axle; 310. driving a motor I; 320. a second driving motor; 410. a first motor controller; 420. a second motor controller; 500. a power battery; 600. a battery management system; 700. and (5) a vehicle control unit.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the utility model are shown, but which may be embodied in many different forms and are not limited to the embodiments described herein, but rather are provided for the purpose of providing a more thorough disclosure of the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1, the four-wheel drive system of the dual-motor-drive pure electric loader of the embodiment includes a first drive axle 210 and a second drive axle 220 for driving wheels 100, where the first drive axle 210 and the second drive axle 220 are driven by a first drive motor 310 and a second drive motor 320, respectively, and the first drive motor 310 and the second drive motor 320 are connected to different motor controllers. The motor controller comprises a first motor controller 410 and a second motor controller 420, and the first motor controller 410 and the second motor controller 420 are in communication connection with the vehicle control unit 700 and are controlled by the vehicle control unit 700. The four-wheel drive structure of the embodiment cancels all gearboxes and traditional components such as an engine and a clutch, realizes the optimal four-wheel drive stepless speed change without gearboxes, and the whole vehicle controller is used as the brain of the whole vehicle, controls two driving motors in real time according to comprehensive information such as load, intention of a driver, energy saving requirements of the whole vehicle and the like, can greatly improve the comprehensive performances such as the work response speed, energy consumption and the like of a loader, particularly the oil consumption of the whole vehicle, has simple structure and convenient installation, and also greatly improves the reliability of the whole vehicle. The vehicle-mounted controller further comprises a battery management system 600, wherein the battery management system 600 is electrically connected with the first motor controller 410, the second motor controller 420 and the vehicle controller 700 at the same time.

The vehicle-mounted power battery system further comprises a power battery 500, wherein the power battery 500 is in communication connection with a battery management system 600, and the power battery 500 is electrically connected with the first motor controller 410 and the second motor controller 420.

The vehicle control unit 700 calculates total driving torque data and optimal system efficiency according to vehicle speed data, driving control data and vehicle load data, and issues rotating speed control commands to the first driving motor 310 and the second driving motor 320 respectively to control the torques of the first driving motor 310 and the second driving motor 320.

The driving control data includes accelerator pedal opening data, brake pedal opening data, gear state, and driving mode.

The total driving torque is calculated in the way of

Obtaining basic driving total torque according to vehicle speed data and a MAP table look-up;

obtaining a driving intention correction coefficient K1 from the driving control data;

obtaining a vehicle load correction coefficient K2 according to the vehicle load data and the load correction MAP;

obtaining a speed ratio i of a vehicle gearbox;

the total driving torque T is equal to the basic total driving torque × K1 × K2 × i.

The optimal system efficiency is calculated in the manner of

And calculating the system efficiency under different torque distributions in real time by combining the real-time table look-up with the efficiency maps of the first driving motor 310 and the second driving motor 320 to obtain the optimal driving torque T1 of the first driving motor 310 and the optimal driving torque T2 of the second driving motor 320 corresponding to the total driving torque T at different vehicle speeds.

Referring to fig. 4 and 5, different load data correspond to different correction coefficients.

The above-mentioned embodiments only express a certain implementation mode of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a pure electric loader control system of bi-motor drive which characterized in that: the driving system comprises a first driving axle (210) and a second driving axle (220) which are used for driving wheels (100), wherein the first driving axle (210) and the second driving axle (220) are respectively driven by a first driving motor (310) and a second driving motor (320), and the first driving motor (310) and the second driving motor (320) are connected with different motor controllers; the motor controller comprises a first motor controller (410) and a second motor controller (420), and the first motor controller (410) and the second motor controller (420) are in communication connection with the whole vehicle controller (700) and controlled by the whole vehicle controller (700); the vehicle-mounted battery management system is characterized by further comprising a battery management system (600), wherein the battery management system (600) is electrically connected with the motor controller I (410), the motor controller II (420) and the vehicle control unit (700) at the same time.

2. The control system of the dual-motor pure electric loader according to claim 1, characterized in that: still include power battery (500), power battery (500) and battery management system (600) communication are connected, power battery (500) are connected with motor controller one (410), motor controller two (420) electricity.

3. The control system of the dual-motor pure electric loader according to claim 2, characterized in that: the vehicle control unit (700) calculates total driving torque data and optimal system efficiency according to vehicle speed data, driving control data and vehicle load data, issues rotating speed control commands to the first driving motor (310) and the second driving motor (320) respectively, and controls the torque of the first driving motor (310) and the second driving motor (320).