Low-electric-quantity protection method for electric excavator

Abstract

The invention discloses an electric excavator low electric quantity protection method which is executed by a controller, a power system, an entertainment system, an alarm system, a battery management system and a pressure sensor are included, the pressure sensor is arranged on a driver seat, and the power system, the entertainment system, the alarm system, the battery management system and the pressure sensor are all connected with the controller. By setting a multi-stage low-electric-quantity reminding and protection mode, a user is effectively reminded to charge the excavator as soon as possible, irreversible damage to the battery caused by limit over-discharge of the battery is avoided, meanwhile, the electric quantity of the battery is concerned in time, charging is conducted, a manager can conveniently plan work of the excavator in advance, and the working efficiency of the excavator is improved. According to the method, whether a driver exists in the excavator or not can be recognized, different modes can be executed, waste of electric energy of the excavator and the hidden danger that the battery is over-discharged due to the fact that no driver exists for a long time are avoided, and good practicability is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of excavators, in particular to a method for low-battery protection of an electric excavator. Background Art

[0002] With the improvement of environmental awareness and the continuous development of new energy technologies, electric excavators, as an energy-saving and environmentally friendly engineering machinery equipment, are attracting more and more attention from the market.

[0003] However, during the use of electric excavators, users fail to pay attention to the battery power in time, resulting in over-discharge of the battery, which will cause irreversible damage to the battery, thus affecting the performance and life of the equipment. At the same time, users fail to pay attention to the battery power in time to charge it, causing the excavator to shut down, which in turn causes work delays and production losses, and reduces work efficiency. In addition, when there is no driver in the excavator and the excavator is not shut down, the excavator's electricity is wasted and there is a hidden danger of over-discharge of the battery when no one is there for a long time. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for low-battery protection of an electric excavator in view of the deficiencies in the prior art, so as to solve at least one of the above-mentioned technical problems.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a method for low-battery protection of an electric excavator, which is executed by a controller and includes a power system, an entertainment system, an alarm system, a battery management system, and a pressure sensor, wherein the pressure sensor is arranged on a driver's seat, and the power system, the entertainment system, the alarm system, the battery management system, and the pressure sensor are all connected to the controller; S1: The battery management system monitors the state of charge of the power battery. When the power level is within the normal range, that is, greater than the threshold value A, it operates normally; S2: The battery management system monitors the state of charge of the power battery. If the charge level is lower than threshold A and greater than threshold B, the system enters a1 mode if there is an operator in the driver's seat, and enters a2 mode if there is no operator in the driver's seat. S3: The battery management system monitors the state of charge of the power battery. When the charge level is lower than the threshold value B and greater than the threshold value C, if there is an operator in the driver's seat, the system enters the b1 mode. If there is no operator in the driver's seat, the system enters the b2 mode. S4: The battery management system monitors the state of charge of the power battery. When the charge is lower than the threshold value C, if there is an operator in the driver's seat, the system enters the C1 mode; if there is no operator in the driver's seat, the system enters the C2 mode. S5: When the real-time battery power returns to a preset normal power range, that is, greater than threshold A, normal operation is resumed.

[0006] Furthermore, the a1 mode includes the controller controlling the alarm system to issue an alarm message; The a2 mode includes the controller controlling the entertainment system to shut down after two minutes, and the controller controlling the power system to shut down after five minutes.

[0007] Furthermore, the b1 mode includes the controller controlling the alarm system to issue an alarm message, and the controller controlling the entertainment system to shut down; The b2 mode includes the controller immediately shutting down the entertainment system, and the controller controlling the power system to shut down after two minutes.

[0008] Furthermore, the c1 mode includes controlling the alarm system to issue an alarm message and the controller to control the power system to limit the power output; The c2 mode includes the controller immediately shutting down the power system.

[0009] Furthermore, the controller is electrically connected to a wireless communication device, and the wireless communication device is wirelessly connected to the main console, and the controller transmits the power information of the battery management system to the main console.

[0010] Furthermore, the main control console monitors the power information of the excavator and issues a dispatch information instruction to the excavator according to the remaining power of the excavator. The excavator receives the dispatch information, and the controller displays the dispatch information on the display.

[0011] Furthermore, the method for determining whether there is an operator in the driving seat includes whether the pressure of the pressure sensor is greater than a threshold value D. If the pressure is greater than the threshold value D, it is determined that there is an operator in the driving seat; if the pressure is less than the threshold value D, it is determined that there is no driver in the driving seat.

[0012] Furthermore, the threshold A, threshold B, and threshold C may be adjusted according to actual application requirements.

[0013] Furthermore, the alarm system is electrically connected to the display screen and the buzzer. The alarm system controls the display screen to display the power information, and the alarm system controls the buzzer to make a sound.

[0014] Furthermore, the power system, entertainment system, alarm system, battery management system, and pressure sensor are all connected to the controller via a CAN bus.

[0015] The beneficial effects of the present invention are: The present invention is provided with a multi-level low-battery reminder and protection mode, thereby effectively reminding the user to charge as soon as possible to avoid irreversible damage to the battery due to over-discharge. At the same time, timely attention is paid to the battery power and the battery is replenished, which is convenient for the management personnel to plan the work of the excavator in advance to avoid the phenomenon of delayed work and production. The present invention can also identify whether there is a driver in the excavator and execute different modes, avoiding the waste of electric energy of the excavator and the hidden danger of over-discharge of the battery when no one is there for a long time, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the steps of the present invention.

[0017] Figure 2 It is a schematic diagram of the connection of various components of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with specific embodiments, and it should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

[0019] Example 1: See Figures 1 to 2 It is a schematic diagram of each structure of the present invention, which is executed by a controller, including a power system, an entertainment system, an alarm system, a battery management system, and a pressure sensor. The pressure sensor is arranged on the driver's seat, and the power system, the entertainment system, the alarm system, the battery management system, and the pressure sensor are all connected to the controller; S1: The battery management system monitors the state of charge of the power battery. When the power level is within the normal range, that is, greater than the threshold of 20%, it operates normally. S2: The battery management system monitors the state of charge of the power battery. If the power level is lower than the threshold of 20% and greater than the threshold of 10%, if there is an operator in the driving seat, the system will enter the A1 mode, that is, the controller will control the alarm system to issue an alarm message to remind the driver of the remaining power. The driver can drive and use the excavator normally. If there is no operator in the driving seat, the system will enter the A2 mode, that is, the controller will control the entertainment system to shut down after two minutes, and the controller will control the power system to shut down after five minutes. S3: The battery management system monitors the state of charge of the power battery. When the power level is lower than the threshold of 10% and greater than the threshold of 5%, if there is an operator in the driving seat, the B1 mode is entered, that is, the controller controls the alarm system to issue an alarm message and the controller controls the entertainment system to shut down, reminding the driver of the remaining power. The driver can drive the excavator normally but cannot use the entertainment system. If there is no operator in the driving seat, the B2 mode is entered, that is, the controller immediately shuts down the entertainment system and controls the power system to shut down after two minutes. S4: The battery management system monitors the state of charge of the power battery. When the power is lower than the threshold of 5%, if there is an operator in the driver's seat, the C1 mode is entered, that is, the alarm system is controlled to issue an alarm message, and the controller controls the power system to limit the power output, limiting the power of the excavator so that it can be driven slowly to the charging place, and the driver cannot use the entertainment system. If there is no operator in the driver's seat, the C2 mode is entered, that is, the controller immediately shuts down the power system; S5: When the real-time battery power returns to the preset normal power range, that is, greater than the threshold of 20%, normal operation is resumed.

[0020] Specifically, the method for determining whether there is an operator in the driving seat includes whether the pressure of the pressure sensor is greater than a threshold value of 25kg. If the pressure is greater than the threshold value of 25kg, it is determined that there is an operator in the driving seat; if the pressure is less than the threshold value of 25kg, it is determined that there is no driver in the driving seat. The pressure sensor senses the signal and transmits the signal to the controller, and the controller makes a decision.

[0021] Specifically, the alarm system is electrically connected to the display screen and the buzzer. The alarm system controls the display screen to display the power information, and the alarm system controls the buzzer to sound. The buzzer sounds and the display screen displays the information that charging is required to remind the driver to charge.

[0022] Specifically, the power system, entertainment system, alarm system, battery management system, and pressure sensor are all connected to the controller via the CAN bus, with a faster transmission speed.

[0023] Embodiment 2: Specifically, the controller is electrically connected to a wireless communication device, which is wirelessly connected to the main console. The controller transmits the power information of the battery management system to the main console, which can display the remaining power of the excavator, making it convenient for managers to manage the excavator.

[0024] Specifically, the main control console monitors the power information of the excavator and issues scheduling information instructions to the excavator based on the remaining power of the excavator. The excavator receives the scheduling information, and the controller displays the scheduling information on the display. The manager issues tasks that can be completed to the excavator based on the remaining power of the excavator. The driver can see the tasks issued by the manager on the display and execute them, which facilitates the scheduling of the excavator and avoids delays in work and production.

[0025] Embodiment 3: Specifically, threshold A, threshold B, and threshold C can be adjusted according to actual application requirements. In colder weather or when battery degradation is more serious, the values ​​of threshold A, threshold B, and threshold C are appropriately adjusted to prevent the excavator from shutting down due to power failure.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for low power protection of an electric excavator, characterized in that: Executed by a controller, including: a power system, an entertainment system, an alarm system, a battery management system, and a pressure sensor, wherein the pressure sensor is arranged on a driver's seat, and the power system, the entertainment system, the alarm system, the battery management system, and the pressure sensor are all connected to the controller; S1: The battery management system monitors the state of charge of the power battery. When the power level is within the normal range, that is, greater than the threshold value A, it operates normally; S2: The battery management system monitors the state of charge of the power battery. If the charge level is lower than threshold A and greater than threshold B, the system enters a1 mode if there is an operator in the driver's seat, and enters a2 mode if there is no operator in the driver's seat. S3: The battery management system monitors the state of charge of the power battery. When the charge level is lower than the threshold value B and greater than the threshold value C, if there is an operator in the driver's seat, the system enters the b1 mode. If there is no operator in the driver's seat, the system enters the b2 mode. S4: The battery management system monitors the state of charge of the power battery. When the charge is lower than the threshold value C, if there is an operator in the driver's seat, the system enters the C1 mode; if there is no operator in the driver's seat, the system enters the C2 mode. S5: When the real-time battery power returns to a preset normal power range, that is, greater than threshold A, normal operation is resumed.

2. The method for low battery protection of an electric excavator according to claim 1, characterized in that: The a1 mode includes the controller controlling the alarm system to issue an alarm message; The a2 mode includes the controller controlling the entertainment system to shut down after two minutes, and the controller controlling the power system to shut down after five minutes.

3. The method for low battery protection of an electric excavator according to claim 1, characterized in that: The b1 mode includes the controller controlling the alarm system to send out an alarm message, and the controller controlling the entertainment system to shut down; The b2 mode includes the controller immediately shutting down the entertainment system, and the controller controlling the power system to shut down after two minutes.

4. The method for low battery protection of an electric excavator according to claim 1, characterized in that: The c1 mode includes controlling the alarm system to issue an alarm message and the controller to control the power system to limit the power output; The c2 mode includes the controller immediately shutting down the power system.

5. The method for low battery protection of an electric excavator according to claim 1, characterized in that: The controller is electrically connected to a wireless communication device, and the wireless communication device is wirelessly connected to the main control console. The controller transmits the power information of the battery management system to the main control console.

6. A method for low battery protection of an electric excavator according to claim 5, characterized in that: The main control console monitors the power information of the excavator and issues dispatch information instructions to the excavator according to the remaining power of the excavator. The excavator receives the dispatch information, and the controller displays the dispatch information on the display.

7. The method for low battery protection of an electric excavator according to claim 1, characterized in that: The method for determining whether there is an operator in the driving seat includes whether the pressure of the pressure sensor is greater than a threshold value D. If the pressure is greater than the threshold value D, it is determined that there is an operator in the driving seat; if the pressure is less than the threshold value D, it is determined that there is no driver in the driving seat.

8. The method for low battery protection of an electric excavator according to claim 1, characterized in that: The threshold A, threshold B, and threshold C can be adjusted according to actual application requirements.

9. The method for low battery protection of an electric excavator according to claim 1, characterized in that: The alarm system is electrically connected to the display screen and the buzzer. The alarm system controls the display screen to display the power information, and the alarm system controls the buzzer to emit a sound.

10. The method for low battery protection of an electric excavator according to claim 1, characterized in that: The power system, entertainment system, alarm system, battery management system, and pressure sensor are all connected to the controller via a CAN bus.

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