Power supply control method and power supply control device applied to engineering machinery

Abstract

The invention relates to the technical field of mechanical power systems, in particular to a power supply control method and a power supply control device applied to engineering machinery. The method comprises the following steps: acquiring a pre-stored drag switch signal; the power dragging switch signal is generated according to human-computer interaction operation at a previous moment, and the power dragging switch signal is used for representing that the power dragging module is in a working state or a standby state; detecting a connection state of the power dragging module and an external power grid to obtain a power grid connection signal; determining a current power supply mode of the engineering machinery according to the drag switch signal and the power grid connection signal; the current power supply mode comprises a pure power supply mode or a drag power supply mode, the pure power supply mode is a mode for supplying power through a battery module, and the power supply module corresponding to the drag power supply mode at least comprises a drag power module. Power is supplied through mutual matching of the battery module and the power dragging module, so that the application universality of the engineering machinery to different types of working scenes is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical power systems, and in particular to a power supply control method and a power supply control device applied to construction machinery. Background Art

[0002] With the continuous improvement of the society's requirements for energy conservation and environmental protection, construction machinery is also undergoing an electrification transformation, and many electrified products have emerged, such as electric excavators driven by motors. At present, there are mainly two power supply methods for electrified products of construction machinery. The first is the pure electric power supply method, in which construction machinery uses a large-capacity battery and a motor built in the vehicle body to drive the machinery to work normally. The second is the trailing cable power supply method, in which the construction machinery vehicle body is not equipped with a battery, and a trailing cable and a motor are used, and the machinery is directly powered by an external power grid to work normally.

[0003] However, it is found in practice that because the power consumption of construction machinery is relatively fast, the working time of construction machinery using the pure electric power supply method is usually less than 4 hours, which is difficult to be applicable to scenarios with long working hours. And construction machinery using the trailing cable power supply method must be connected to the power grid, which is greatly affected by site conditions and cannot be applicable to working scenarios without a power grid in the wild.

[0004] Therefore, how to improve the applicability of construction machinery to different types of working scenarios is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0005] The present invention provides a power supply control method and a power supply control device applied to construction machinery, which can improve the power supply method of construction machinery to improve the applicability of construction machinery to different types of working scenarios.

[0006] To solve the above technical problems, in a first aspect of the present invention, a power supply control method applied to construction machinery is disclosed. The construction machinery is configured with a battery module and a trailing cable module. The battery module is used to store electric energy, and the trailing cable module is used to connect to an external power grid. The method includes:

[0007] Obtain a pre-stored trailing cable switch signal; the trailing cable switch signal is generated according to a human-machine interaction operation at a previous moment, and the trailing cable switch signal is used to indicate that the trailing cable module is in a working state or a standby state;

[0008] Detect the connection state between the trailing cable module and the external power grid to obtain a power grid connection signal;

[0009] Determine the current power supply mode of the construction machinery according to the power take-off switch signal and the grid connection signal; the current power supply mode includes a pure electric power supply mode or a power take-off power supply mode, the pure electric power supply mode is a mode of supplying power through the battery module, and the power supply module corresponding to the power take-off power supply mode at least includes the power take-off module.

[0010] As an alternative implementation, in the first aspect of the present invention, the determining the current power supply mode of the construction machinery according to the power take-off switch signal and the grid connection signal includes:

[0011] If the power take-off switch signal indicates that the power take-off module is in the standby state, it is determined that the construction machinery is in the pure electric power supply mode;

[0012] If the power take-off switch signal indicates that the power take-off module is in the working state and the grid connection signal indicates that the power take-off module is electrically disconnected from the external grid, it is determined that the construction machinery is in the pure electric power supply mode;

[0013] If the power take-off switch signal indicates that the power take-off module is in the working state and the grid connection signal indicates that the power take-off module is electrically connected to the external grid, it is determined that the construction machinery is in the power take-off power supply mode.

[0014] As an alternative implementation, in the first aspect of the present invention, after determining the current power supply mode of the construction machinery according to the power take-off switch signal and the grid connection signal, the method further includes:

[0015] When the construction machinery is in the power take-off power supply mode, obtain a motor start signal and start the power motor of the construction machinery according to the motor start signal so that the construction machinery enters the operating state; the motor start signal is generated according to the human-machine interaction operation at a previous moment;

[0016] Calculate the target operating power of the power motor of the construction machinery to obtain the motor target power;

[0017] Calculate the output power of the power take-off module to obtain the power take-off power supply power;

[0018] Determine the current power supply state corresponding to the construction machinery according to the motor target power and the power take-off power supply power;

[0019] Wherein, the current power supply state includes a first power supply state and a second power supply state, the first power supply state is a state of supplying power through the power take-off module, and the second power supply state is a state of supplying power through the power take-off module and the battery module.

[0020] As an alternative embodiment, in the first aspect of the present invention, determining the current power supply state corresponding to the construction machinery according to the motor target power and the towed power supply power includes:

[0021] If the motor target power is less than the towed power supply power, it is determined that the construction machinery is in the first power supply state, and the remaining power signal of the battery module is obtained. If the remaining power signal indicates that the battery module is not fully charged, the difference between the towed power supply power and the motor target power is calculated to obtain the first charging power, and the towed module is controlled to charge the battery module with the first charging power;

[0022] If the motor target power is equal to the towed power supply power, it is determined that the construction machinery is in the first power supply state;

[0023] If the motor target power is greater than the towed power supply power, the remaining power signal of the battery module is obtained, and the current power supply state of the construction machinery is determined according to the remaining power signal, the motor target power and the towed power supply power.

[0024] As an alternative embodiment, in the first aspect of the present invention, determining the current power supply state of the construction machinery according to the remaining power signal, the motor target power and the towed power supply power includes:

[0025] If the remaining power signal indicates that the remaining power of the battery module is not less than a preset first power threshold, the difference between the motor target power and the towed power supply power is calculated to obtain the battery power supply power, and the battery module is controlled to supply power to the construction machinery with the battery power supply power, and the towed module is controlled to supply power to the construction machinery with the towed power supply power, so that the construction machinery is in the second power supply state;

[0026] If the remaining power signal indicates that the remaining power of the battery module is less than a preset first power threshold, control the power-dragging module to supply power to the construction machinery at a preset low-power supply power so that the construction machinery is in a first power supply state, calculate the difference between the power-dragging supply power and the low-power supply power to obtain a second charging power, control the power-dragging module to charge the battery module with the second charging power, and update the remaining power signal in real time. When the updated remaining power signal indicates that the remaining power of the battery module is not less than a preset second power threshold, calculate the difference between the target power of the motor and the power-dragging supply power to obtain a battery supply power, control the battery module to supply power to the construction machinery with the battery supply power, and control the power-dragging module to supply power to the construction machinery with the power-dragging supply power so that the construction machinery is in a second power supply state;

[0027] Wherein, the low-power supply power is less than the power-dragging supply power, and the second power threshold is greater than the first power threshold.

[0028] As an optional implementation manner, in the first aspect of the present invention, the construction machinery is further configured with a charging module, and the charging module is used to connect to an external charging device to charge the battery module;

[0029] After determining the current power supply mode of the construction machinery according to the power-dragging switch signal and the grid connection signal, the method further includes:

[0030] When the construction machinery is in the pure electric power supply mode, after receiving a motor start signal of the power motor of the construction machinery, detect the connection state between the charging module and the external charging device to obtain a charging connection signal; the motor start signal is generated according to a human-computer interaction operation at a previous moment;

[0031] Control the working state of the construction machinery according to the charging connection signal and the motor start signal.

[0032] As an optional implementation manner, in the first aspect of the present invention, the controlling the working state of the construction machinery according to the charging connection signal and the motor start signal includes:

[0033] If the charging connection signal indicates that there is an electrical connection between the charging module and the external charging device, charge the battery module through the charging module so that the construction machinery enters a charging state; wherein, when the construction machinery is in the charging state, the power motor of the construction machinery does not start;

[0034] If the charging connection signal indicates an electrical disconnection between the charging module and the external charging device, the power motor of the construction machinery is started according to the motor start signal, so that the construction machinery enters an operating state.

[0035] A second aspect of the present invention discloses a power supply control device applied to construction machinery. The construction machinery is configured with a battery module and a power supply module. The battery module is used to store electric energy, and the power supply module is used to connect to an external power grid. The device includes:

[0036] A first signal acquisition module, configured to acquire a pre-stored power supply switch signal; the power supply switch signal is generated according to a human-machine interaction operation at a previous moment, and the power supply switch signal is used to indicate that the power supply module is in a working state or a standby state;

[0037] A second signal acquisition module, configured to detect the connection state between the power supply module and the external power grid to obtain a grid connection signal;

[0038] A power supply mode determination module, configured to determine the current power supply mode of the construction machinery according to the power supply switch signal and the grid connection signal; the current power supply mode includes a pure electric power supply mode or a power supply mode, and the pure electric power supply mode is a mode of supplying power through the battery module. The power supply module corresponding to the power supply mode includes at least the power supply module.

[0039] As an optional implementation manner, in the second aspect of the present invention, the specific manner in which the power supply mode determination module determines the current power supply mode of the construction machinery according to the power supply switch signal and the grid connection signal includes:

[0040] If the power supply switch signal indicates that the power supply module is in a standby state, it is determined that the construction machinery is in a pure electric power supply mode;

[0041] If the power supply switch signal indicates that the power supply module is in a working state, and the grid connection signal indicates an electrical disconnection between the power supply module and the external power grid, it is determined that the construction machinery is in a pure electric power supply mode;

[0042] If the power supply switch signal indicates that the power supply module is in a working state, and the grid connection signal indicates an electrical connection between the power supply module and the external power grid, it is determined that the construction machinery is in a power supply mode.

[0043] As an optional implementation manner, in the second aspect of the present invention, the device further includes:

[0044] A third signal acquisition module, configured to, after the power supply mode determination module determines the current power supply mode of the construction machinery according to the power take-off switch signal and the grid connection signal, when the construction machinery is in the power take-off power supply mode, acquire a motor start signal, and start the power motor of the construction machinery according to the motor start signal, so that the construction machinery enters an operating state; the motor start signal is generated according to a human-machine interaction operation at a previous moment;

[0045] A motor power calculation module, configured to calculate a target operating power of the power motor of the construction machinery to obtain a motor target power;

[0046] A power take-off power calculation module, configured to calculate an output power of the power take-off module to obtain a power take-off power supply power;

[0047] A power supply state control module, configured to determine the current power supply state corresponding to the construction machinery according to the motor target power and the power take-off power supply power;

[0048] Wherein, the current power supply state includes a first power supply state and a second power supply state, the first power supply state is a state of supplying power through the power take-off module, and the second power supply state is a state of supplying power through the power take-off module and the battery module.

[0049] As an optional implementation manner, in the second aspect of the present invention, the specific manner in which the power supply state control module determines the current power supply state corresponding to the construction machinery according to the motor target power and the power take-off power supply power includes:

[0050] If the motor target power is less than the power take-off power supply power, it is determined that the construction machinery is in the first power supply state, a remaining power signal of the battery module is acquired, and if the remaining power signal indicates that the battery module is not fully charged, the difference between the power take-off power supply power and the motor target power is calculated to obtain a first charging power, and the power take-off module is controlled to charge the battery module with the first charging power;

[0051] If the motor target power is equal to the power take-off power supply power, it is determined that the construction machinery is in the first power supply state;

[0052] If the motor target power is greater than the power take-off power supply power, a remaining power signal of the battery module is acquired, and the current power supply state of the construction machinery is determined according to the remaining power signal, the motor target power, and the power take-off power supply power.

[0053] As an alternative implementation, in the second aspect of the present invention, the specific manner in which the power supply state control module determines the current power supply state of the construction machinery according to the remaining power signal, the motor target power, and the towed power supply power includes:

[0054] If the remaining power signal indicates that the remaining power of the battery module is not less than a preset first power threshold, calculate the difference between the motor target power and the towed power supply power to obtain the battery power supply power, and control the battery module to supply power to the construction machinery with the battery power supply power, and control the towed module to supply power to the construction machinery with the towed power supply power, so that the construction machinery is in the second power supply state;

[0055] If the remaining power signal indicates that the remaining power of the battery module is less than the preset first power threshold, control the towed module to supply power to the construction machinery with a preset low-power supply power so that the construction machinery is in the first power supply state, calculate the difference between the towed power supply power and the low-power supply power to obtain the second charging power, control the towed module to charge the battery module with the second charging power, and update the remaining power signal in real time. When the updated remaining power signal indicates that the remaining power of the battery module is not less than the preset second power threshold, calculate the difference between the motor target power and the towed power supply power to obtain the battery power supply power, control the battery module to supply power to the construction machinery with the battery power supply power, and control the towed module to supply power to the construction machinery with the towed power supply power, so that the construction machinery is in the second power supply state;

[0056] Wherein, the low-power supply power is less than the towed power supply power, and the second power threshold is greater than the first power threshold.

[0057] As an alternative implementation, in the second aspect of the present invention, the construction machinery is further configured with a charging module, and the charging module is used to connect to an external charging device to charge the battery module;

[0058] The device further includes:

[0059] A fourth signal acquisition module, configured to, after the power supply mode determination module determines the current power supply mode of the construction machinery according to the towed switch signal and the grid connection signal, when the construction machinery is in the pure electric power supply mode, after receiving the motor start signal of the power motor of the construction machinery, detect the connection state between the charging module and the external charging device to obtain a charging connection signal; the motor start signal is generated according to a human-machine interaction operation at a previous moment;

[0060] A working state control module, configured to control the working state of the construction machinery according to the charging connection signal and the motor starting signal.

[0061] As an alternative implementation manner, in the second aspect of the present invention, the specific manner in which the working state control module controls the working state of the construction machinery according to the charging connection signal and the motor starting signal includes:

[0062] If the charging connection signal indicates an electrical connection between the charging module and the external charging device, the battery module is charged through the charging module, so that the construction machinery enters a charging state; wherein, when the construction machinery is in the charging state, the power motor of the construction machinery does not start;

[0063] If the charging connection signal indicates an electrical disconnection between the charging module and the external charging device, the power motor of the construction machinery is started according to the motor starting signal, so that the construction machinery enters an operating state.

[0064] A third aspect of the present invention discloses another one, the device includes:

[0065] A memory storing executable program code;

[0066] A processor coupled to the memory;

[0067] The processor calls the executable program code stored in the memory and executes a power supply control method for construction machinery disclosed in the first aspect of the present invention.

[0068] A fourth aspect of the present invention discloses a computer storage medium, the computer storage medium stores computer instructions, and when the computer instructions are called by a processor, they are used to execute a power supply control method for construction machinery disclosed in the first aspect of the present invention.

[0069] Compared with the prior art, the present invention has the following beneficial effects:

[0070] Obtain a power-dragging switch signal indicating that the power-dragging module is in a working state or a standby state, and detect the connection state between the power-dragging module and the external power grid to obtain a grid connection signal, so as to determine the current power supply mode of the construction machinery according to the power-dragging switch signal and the grid connection signal. The current power supply mode can be a pure electric power supply mode powered by the battery module or a power-dragging power supply mode powered by at least the power-dragging module. Power supply through the power-dragging module enables the construction machinery to be applicable to scenarios of long-term uninterrupted work, and power supply through the battery module enables the construction machinery to be applicable to scenarios without a power grid in the wild. That is, power supply is carried out by matching the battery module and the power-dragging module with each other, thereby improving the applicability of the construction machinery to different types of work scenarios. Brief Description of the Drawings

[0071] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0072] Figure 1 is a schematic flowchart of a power supply control method applied to construction machinery disclosed in an embodiment of the present invention;

[0073] Figure 2 is a schematic structural diagram of a power supply control device applied to construction machinery disclosed in an embodiment of the present invention;

[0074] Figure 3 is a schematic structural diagram of another power supply control device applied to construction machinery disclosed in an embodiment of the present invention;

[0075] Figure 4 is a schematic structural diagram of yet another power supply control device applied to construction machinery disclosed in an embodiment of the present invention;

[0076] Figure 5 is a schematic structural diagram of yet another power supply control device applied to construction machinery disclosed in an embodiment of the present invention. Detailed Embodiments

[0077] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0078] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or the like that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or the like.

[0079] References herein to "embodiments" mean that particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0080] With the increasing social requirements for energy conservation and environmental protection, construction machinery is also undergoing electrification transformation, and many electrified products have emerged, such as electric excavators driven by motors. At present, there are mainly two power supply methods for electrified products of construction machinery. The first is the pure electric power supply method, in which construction machinery uses a large-capacity battery and a motor built into the vehicle body to drive the machinery to work normally. The second is the trailing cable power supply method, in which the construction machinery vehicle body is not equipped with a battery, but uses a trailing cable and a motor, and is directly powered by an external power grid to drive the machinery to work normally.

[0081] However, it has been found in practice that because construction machinery consumes electricity relatively quickly, the working time of construction machinery using the pure electric power supply method is usually less than 4 hours, making it difficult to be applicable to scenarios with long working hours. And construction machinery using the trailing cable power supply method must be connected to the power grid, which is greatly affected by site conditions and cannot be applicable to working scenarios without a power grid in the wild.

[0082] Therefore, how to improve the applicability of construction machinery to different types of working scenarios is a technical problem that needs to be solved urgently at present.

[0083] To solve the above technical problems, the present invention discloses a power supply control method and a power supply control device for construction machinery, which can improve the power supply method of construction machinery to enhance the applicability of construction machinery to different types of working scenarios. The following will be described in detail respectively.

[0084] Embodiment 1

[0085] Please refer to Figure 1 , Figure 1 which is a schematic flow chart of a power supply control method for construction machinery disclosed in an embodiment of the present invention. Figure 1 The power supply control method shown can be executed in a power supply control device, which can improve the power supply method of construction machinery to enhance the applicability of construction machinery to different types of working scenarios. Further, the power supply control device can be integrated into the power system of construction machinery or exist independently of the power system of construction machinery, which is not limited in the embodiments of the present invention. Construction machinery is configured with a battery module and a trailing cable module. The battery module is used to store electrical energy, and the trailing cable module is used to connect to an external power grid. As Figure 1 shown, a power supply control method for construction machinery disclosed in an embodiment of the present invention includes but is not limited to the following operations:

[0086] 101. Obtain a pre-stored power-dragging switch signal; the power-dragging switch signal is generated according to a human-machine interaction operation at a previous moment, and the power-dragging switch signal is used to represent that the power-dragging module is in a working state or a standby state.

[0087] It should be noted that in the embodiments of the present invention, the construction machinery is provided with a mechanical switch for controlling the opening or closing of the power-dragging module or a touch-type human-machine interaction switch displayed on the instrument screen of the construction machinery. The operator of the construction machinery controls the power-dragging module to turn on to enter the working state or turn off to enter the standby state by operating the mechanical switch or clicking and sliding the interaction switch on the instrument screen.

[0088] 102. Detect the connection state between the power-dragging module and the external power grid to obtain a grid connection signal.

[0089] 103. Determine the current power supply mode of the construction machinery according to the power-dragging switch signal and the grid connection signal; the current power supply mode includes a pure electric power supply mode or a power-dragging power supply mode. The pure electric power supply mode is a mode of supplying power through the battery module, and the power supply module corresponding to the power-dragging power supply mode at least includes the power-dragging module.

[0090] It can be seen that in the embodiments of the present invention, a power-dragging switch signal representing that the power-dragging module is in a working state or a standby state is obtained, and the connection state between the power-dragging module and the external power grid is detected to obtain a grid connection signal, so as to determine the current power supply mode of the construction machinery according to the power-dragging switch signal and the grid connection signal. The current power supply mode can be a pure electric power supply mode of supplying power through the battery module or a power-dragging power supply mode of supplying power at least through the power-dragging module. Supplying power through the power-dragging module enables the construction machinery to be applicable to scenarios of long-term uninterrupted work, and supplying power through the battery module enables the construction machinery to be applicable to scenarios without a power grid in the wild, that is, the battery module and the power-dragging module are used in combination to supply power, thereby improving the applicability of the construction machinery to different types of work scenarios.

[0091] In an optional embodiment, determining the current power supply mode of the construction machinery according to the power-dragging switch signal and the grid connection signal specifically includes:

[0092] If the power-dragging switch signal represents that the power-dragging module is in the standby state, it is determined that the construction machinery is in the pure electric power supply mode;

[0093] If the power-dragging switch signal represents that the power-dragging module is in the working state and the grid connection signal represents that the power-dragging module is electrically disconnected from the external power grid, it is determined that the construction machinery is in the pure electric power supply mode;

[0094] If the power-dragging switch signal represents that the power-dragging module is in the working state and the grid connection signal represents that the power-dragging module is electrically connected to the external power grid, it is determined that the construction machinery is in the power-dragging power supply mode.

[0095] It can be seen that this optional embodiment automatically selects the current power supply mode suitable for construction machinery according to whether the power towing module is in the working state and whether the power towing module is connected to the external power grid, without the need for the operator of the construction machinery to manually select, thereby improving the working efficiency of the construction machinery.

[0096] In another optional embodiment, after determining the current power supply mode of the construction machinery according to the power towing switch signal and the power grid connection signal, a power supply control method for construction machinery disclosed in the embodiments of the present invention further includes:

[0097] When the construction machinery is in the power towing power supply mode, obtain the motor start signal, and start the power motor of the construction machinery according to the motor start signal, so that the construction machinery enters the working state; the motor start signal is generated according to the human-computer interaction operation at the previous moment;

[0098] Calculate the target operating power of the power motor of the construction machinery to obtain the motor target power;

[0099] Calculate the output power of the power towing module to obtain the power towing power supply;

[0100] Determine the current power supply state corresponding to the construction machinery according to the motor target power and the power towing power supply;

[0101] Wherein, the current power supply state includes a first power supply state and a second power supply state. The first power supply state is the state of supplying power through the power towing module, and the second power supply state is the state of supplying power through the power towing module and the battery module.

[0102] It can be understood that the construction machinery is provided with a control switch for starting the motor, such as a key switch device. The operator of the construction machinery inserts the key into the key switch device and turns it to the corresponding gear to start the power motor of the construction machinery.

[0103] It can be seen that this optional embodiment selects to supply power through the power towing module or to supply power jointly through the power towing module and the battery module according to the motor target power and the power towing power supply, thereby ensuring the operating efficiency of the power motor of the construction machinery.

[0104] In yet another optional embodiment, determining the current power supply state corresponding to the construction machinery according to the motor target power and the power towing power supply specifically includes:

[0105] If the motor target power is less than the power towing power supply, it is determined that the construction machinery is in the first power supply state, obtain the remaining power signal of the battery module, if the remaining power signal indicates that the battery module is not fully charged, then calculate the difference between the power towing power supply and the motor target power to obtain the first charging power, and control the power towing module to charge the battery module with the first charging power;

[0106] If the target power of the motor is equal to the power supplied by the towed power supply, it is determined that the construction machinery is in the first power supply state;

[0107] If the target power of the motor is greater than the power supplied by the towed power supply, obtain the remaining power signal of the battery module, and determine the current power supply state of the construction machinery according to the remaining power signal, the target power of the motor, and the power supplied by the towed power supply.

[0108] It can be seen that in this optional embodiment, when the target power of the motor is equal to the power supplied by the towed power supply, the towed power supply module only supplies power to the power motor of the construction machinery. When the power supplied by the towed power supply is greater than the target power of the motor and the battery module is not fully charged, control the towed power supply module to supply energy to the power motor of the construction machinery at the target power of the motor, and also provide the remaining power supply power to the battery module to charge the battery module, improving the energy utilization efficiency of the towed power supply module.

[0109] In another optional embodiment, determining the current power supply state of the construction machinery according to the remaining power signal, the target power of the motor, and the power supplied by the towed power supply specifically includes:

[0110] If the remaining power signal indicates that the remaining power of the battery module is not less than a preset first power threshold, calculate the difference between the target power of the motor and the power supplied by the towed power supply to obtain the battery power supply power, and control the battery module to supply power to the construction machinery at the battery power supply power, and control the towed power supply module to supply power to the construction machinery at the power supplied by the towed power supply, so that the construction machinery is in the second power supply state;

[0111] If the remaining power signal indicates that the remaining power of the battery module is less than the preset first power threshold, control the towed power supply module to supply power to the construction machinery at a preset low-power supply power so that the construction machinery is in the first power supply state, calculate the difference between the power supplied by the towed power supply and the low-power supply power to obtain the second charging power, control the towed power supply module to charge the battery module at the second charging power, and update the remaining power signal in real time. When the updated remaining power signal indicates that the remaining power of the battery module is not less than the preset second power threshold, calculate the difference between the target power of the motor and the power supplied by the towed power supply to obtain the battery power supply power, control the battery module to supply power to the construction machinery at the battery power supply power, and control the towed power supply module to supply power to the construction machinery at the power supplied by the towed power supply, so that the construction machinery is in the second power supply state;

[0112] Wherein, the low-power supply power is less than the power supplied by the towed power supply, and the second power threshold is greater than the first power threshold.

[0113] It can be seen that in this optional embodiment, when the remaining power of the battery module is sufficient, the power motor of the construction machinery is powered by both the power supply module and the battery module, so that the power motor operates at the target power to ensure the working efficiency of the construction machinery. When the remaining power of the battery module is insufficient, the power supply module supplies power to the power motor at a lower power and charges the battery module at the same time. When the remaining power of the battery module recovers to a certain threshold, the power supply is switched to be provided by both the power supply module and the battery module to the power motor of the construction machinery, so that the power motor operates at the target power to ensure the working efficiency of the construction machinery.

[0114] It can be understood that the specific values of the first power threshold and the second power threshold can be set according to the actual application scenario requirements. In another optional embodiment, the first power threshold is set to 15% and the second power threshold is set to 20%. The specific current power supply state of the construction machinery determined according to the remaining power signal, the motor target power, and the power supply power of the power supply module can be as follows: when the remaining power of the battery module is at least 15%, the power motor of the construction machinery is powered by both the power supply module and the battery module, so that the power motor operates at the target power to ensure the working efficiency of the construction machinery. When the remaining power of the battery module is lower than 15%, the power supply module supplies power to the power motor at a lower power and charges the battery module at the same time. When the battery is charged to 20% of the power, the power supply is switched to be provided by both the power supply module and the battery module to the power battery of the construction machinery, so that the power motor operates at the target power to ensure the working efficiency of the construction machinery.

[0115] In another optional embodiment, the construction machinery is further configured with a charging module for connecting to an external charging device to charge the battery module;

[0116] After determining the current power supply mode of the construction machinery according to the power supply switch signal and the grid connection signal, a power supply control method for construction machinery disclosed by the present invention further includes:

[0117] When the construction machinery is in the pure electric power supply mode, after receiving the motor start signal of the power motor of the construction machinery, the connection state between the charging module and the external charging device is detected to obtain a charging connection signal; the motor start signal is generated according to the human-machine interaction operation at the previous moment;

[0118] Control the working state of the construction machinery according to the charging connection signal and the motor start signal.

[0119] This optional embodiment first detects whether the construction machinery is connected to an external charging device (such as a charging pile) before starting the power motor of the construction machinery, and then determines the working state of the construction machinery according to the connection situation of the external charging device and the motor start signal.

[0120] In yet another alternative embodiment, controlling the working state of the construction machinery according to the charging connection signal and the motor start signal specifically includes:

[0121] If the charging connection signal indicates an electrical connection between the charging module and an external charging device, the battery module is charged through the charging module so that the construction machinery enters a charging state; wherein, when the construction machinery is in the charging state, the power motor of the construction machinery does not start;

[0122] If the charging connection signal indicates an electrical disconnection between the charging module and the external charging device, the power motor of the construction machinery is started according to the motor start signal so that the construction machinery enters an operating state.

[0123] It can be seen that in this alternative embodiment, when the construction machinery is connected to an external charging device, the construction machinery is controlled to enter the charging state and the motor start signal is ignored, thereby ensuring normal charging of the construction machinery; when the construction machinery is not connected to an external charging device, the power motor of the construction machinery is started in response to the motor start signal, so that the construction machinery normally enters the operating state.

[0124] In yet another alternative embodiment, the construction machinery of the embodiment of the present invention is further configured with a battery health monitoring module, and the battery health monitoring module is used to monitor the health state of the battery module in real time and generate a health state signal; the health state signal includes at least one or more parameters among the battery capacity attenuation rate, the internal resistance change value, and the number of charge and discharge cycles;

[0125] The power supply control method for construction machinery disclosed in the embodiment of the present invention further includes:

[0126] When it is determined that the current power supply mode is a pure electric power supply mode, the health state signal is obtained. If the health state signal indicates that the battery capacity attenuation rate exceeds a preset battery attenuation threshold or the internal resistance change value exceeds a preset battery internal resistance threshold, the current maximum discharge power of the battery module is reduced to a preset first safe discharge power, and a battery maintenance prompt signal is generated;

[0127] When the construction machinery is in the trailing power supply mode and needs to switch to the second power supply state, if the health state signal indicates that the remaining number of charge and discharge cycles of the battery module exceeds a preset cycle number threshold, the trailing power module is preferentially controlled to supply power at the maximum output power, and the power supply power of the battery module is limited not to exceed a preset second safe discharge power to extend the service life of the battery module.

[0128] Specifically, the battery health monitoring module calculates the battery capacity attenuation rate and the internal resistance change value by periodically collecting the voltage, current, and temperature data of the battery module, combining the historical charge and discharge records, and using a preset battery aging model. The battery maintenance prompt signal is displayed through the human-machine interface of the construction machinery to prompt the operator to perform battery maintenance or replacement.

[0129] It can be seen that through the introduction of battery health status monitoring, this optional embodiment can dynamically adjust the output strategy of the battery module in power supply control, avoid the overload risk caused by battery aging, optimize battery life management, and improve system reliability at the same time.

[0130] In another optional embodiment, a power supply control method for construction machinery disclosed in an embodiment of the present invention further includes:

[0131] When the construction machinery is in the second power supply state, the instantaneous power output of the power towing module and the instantaneous power output of the battery module of the battery module are monitored in real time, and the power fluctuation difference between the instantaneous power output of the power towing module and the instantaneous power output of the battery module is calculated; if the power fluctuation difference exceeds a preset fluctuation threshold, the dynamic smoothing algorithm is started, and by adjusting the power output response speed of the power towing module, the power supplement delay of the battery module is made opposite to the power fluctuation phase of the power towing module, so as to cancel the overall power fluctuation of the system;

[0132] Further, if the current operation task of the construction machinery is a periodic operation task (such as the bucket lifting cycle of an excavator), the target power of the motor in the next cycle is predicted according to historical operation data, and the power distribution ratio of the power towing module and the battery module is adjusted in advance to reduce the impact of power supply switching delay on operation efficiency.

[0133] It can be seen that through the introduction of the dynamic load balancing mechanism, this optional embodiment effectively suppresses the power oscillation problem in the hybrid power supply mode, and at the same time, combined with operation mode prediction, realizes the advanced optimization of power supply control, and further improves the operation coherence and energy efficiency ratio of the construction machinery.

[0134] Embodiment 2

[0135] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of a power supply control device for construction machinery disclosed in an embodiment of the present invention. Figure 2 The power supply control device shown can execute the power supply control method described in Embodiment 1. This power supply control device can improve the power supply method of the construction machinery to improve the applicability of the construction machinery to different types of working scenarios. Further, this power supply control device can be integrated into the power system of the construction machinery or exist independently of the power system of the construction machinery, which is not limited in the embodiment of the present invention. The construction machinery is configured with a battery module and a power towing module. The battery module is used to store electrical energy, and the power towing module is used to connect to an external power grid. As Figure 2 shown, a power supply control device for construction machinery disclosed in an embodiment of the present invention includes but is not limited to the following modules:

[0136] The first signal acquisition module 201 is configured to acquire a pre-stored power-dragging switch signal. The power-dragging switch signal is generated according to a human-machine interaction operation at a previous moment, and is used to indicate that the power-dragging module is in a working state or a standby state.

[0137] The second signal acquisition module 202 is configured to detect the connection state between the power-dragging module and an external power grid to obtain a grid connection signal.

[0138] The power supply mode determination module 203 is configured to determine the current power supply mode of the construction machinery according to the power-dragging switch signal and the grid connection signal. The current power supply mode includes a pure electric power supply mode or a power-dragging power supply mode. The pure electric power supply mode is a mode of supplying power through a battery module, and the power supply module corresponding to the power-dragging power supply mode includes at least a power-dragging module.

[0139] It should be noted that in the embodiments of the present invention, the construction machinery is provided with a mechanical switch for controlling the power-dragging module to be turned on or off, or a touch-type human-machine interaction switch displayed on the instrument screen of the construction machinery. The operator of the construction machinery controls the power-dragging module to be turned on to enter the working state or turned off to enter the standby state by operating the mechanical switch or clicking and sliding the interaction switch on the instrument screen.

[0140] It can be seen that in the embodiments of the present invention, a power-dragging switch signal indicating that the power-dragging module is in a working state or a standby state is acquired, and the connection state between the power-dragging module and the external power grid is detected to obtain a grid connection signal, so as to determine the current power supply mode of the construction machinery according to the power-dragging switch signal and the grid connection signal. The current power supply mode can be a pure electric power supply mode of supplying power through a battery module or a power-dragging power supply mode of supplying power at least through a power-dragging module. Supplying power through the power-dragging module enables the construction machinery to be applicable to scenarios of long-term uninterrupted work, and supplying power through the battery module enables the construction machinery to be applicable to scenarios without a power grid in the wild, that is, the battery module and the power-dragging module are mutually matched for power supply, thereby improving the applicability of the construction machinery to different types of work scenarios.

[0141] In an optional embodiment, the specific manner in which the power supply mode determination module 203 determines the current power supply mode of the construction machinery according to the power-dragging switch signal and the grid connection signal includes:

[0142] If the power-dragging switch signal indicates that the power-dragging module is in the standby state, it is determined that the construction machinery is in the pure electric power supply mode;

[0143] If the power-dragging switch signal indicates that the power-dragging module is in the working state, and the grid connection signal indicates that the power-dragging module is electrically disconnected from the external power grid, it is determined that the construction machinery is in the pure electric power supply mode;

[0144] If the power-dragging switch signal indicates that the power-dragging module is in the working state and the power grid connection signal indicates an electrical connection between the power-dragging module and the external power grid, it is determined that the construction machinery is in the power-dragging power supply mode.

[0145] It can be seen that in this alternative embodiment, the current power supply mode suitable for the construction machinery is automatically selected according to whether the power-dragging module is in the working state and whether the power-dragging module is connected to the external power grid, without the need for the operator of the construction machinery to manually select, thereby improving the working efficiency of the construction machinery.

[0146] In another alternative embodiment, please refer to Figure 3 , Figure 3 which is a schematic structural diagram of another power supply control device applied to construction machinery disclosed in the embodiments of the present invention. As Figure 3 shown, a power supply control device applied to construction machinery disclosed in the embodiments of the present invention further includes:

[0147] A third signal acquisition module 204, configured to, after the power supply mode determination module 203 determines the current power supply mode of the construction machinery according to the power-dragging switch signal and the power grid connection signal, when the construction machinery is in the power-dragging power supply mode, acquire a motor start signal and start the power motor of the construction machinery according to the motor start signal, so that the construction machinery enters the working state; the motor start signal is generated according to the human-computer interaction operation at a previous moment;

[0148] A motor power calculation module 205, configured to calculate the target operating power of the power motor of the construction machinery to obtain the motor target power;

[0149] A power-dragging power calculation module 206, configured to calculate the output power of the power-dragging module to obtain the power-dragging power supply power;

[0150] A power supply state control module 207, configured to determine the current power supply state corresponding to the construction machinery according to the motor target power and the power-dragging power supply power;

[0151] wherein the current power supply state includes a first power supply state and a second power supply state, the first power supply state is the state of supplying power through the power-dragging module, and the second power supply state is the state of supplying power through the power-dragging module and the battery module.

[0152] It can be understood that the construction machinery is provided with a control switch for starting the motor, such as a key switch device. The operator of the construction machinery inserts the key into the key switch device and turns it to the corresponding gear to start the power motor of the construction machinery.

[0153] It can be seen that in this alternative embodiment, it is selected to supply power through the power-dragging module or to supply power jointly through the power-dragging module and the battery module according to the motor target power and the power-dragging power supply power, thereby ensuring the operating efficiency of the power motor of the construction machinery.

[0154] In yet another alternative embodiment, the specific manner in which the power supply state control module 207 determines the current power supply state corresponding to the construction machinery according to the target power of the motor and the power supply power of the traction power supply includes:

[0155] If the target power of the motor is less than the power supply power of the traction power supply, it is determined that the construction machinery is in the first power supply state, and the remaining power signal of the battery module is obtained. If the remaining power signal indicates that the battery module is not fully charged, the difference between the power supply power of the traction power supply and the target power of the motor is calculated to obtain the first charging power, and the traction module is controlled to charge the battery module with the first charging power;

[0156] If the target power of the motor is equal to the power supply power of the traction power supply, it is determined that the construction machinery is in the first power supply state;

[0157] If the target power of the motor is greater than the power supply power of the traction power supply, the remaining power signal of the battery module is obtained, and the current power supply state of the construction machinery is determined according to the remaining power signal, the target power of the motor, and the power supply power of the traction power supply.

[0158] It can be seen that in this alternative embodiment, when the target power of the motor is equal to the power supply power of the traction power supply, the traction module only supplies power to the power motor of the construction machinery. When the power supply power of the traction power supply is greater than the target power of the motor and the battery module is not fully charged, the traction module is controlled to not only supply energy to the power motor of the construction machinery at the target power of the motor, but also provide the remaining supply power to the battery module to charge the battery module, improving the energy utilization efficiency of the traction module.

[0159] In yet another alternative embodiment, the specific manner in which the power supply state control module 207 determines the current power supply state of the construction machinery according to the remaining power signal, the target power of the motor, and the power supply power of the traction power supply includes:

[0160] If the remaining power signal indicates that the remaining power of the battery module is not less than a preset first power threshold, the difference between the target power of the motor and the power supply power of the traction power supply is calculated to obtain the battery power supply power, and the battery module is controlled to supply power to the construction machinery with the battery power supply power, and the traction module is controlled to supply power to the construction machinery with the power supply power of the traction power supply, so that the construction machinery is in the second power supply state;

[0161] If the remaining power signal indicates that the remaining power of the battery module is less than a preset first power threshold, control the power-dragging module to supply power to the construction machinery at a preset low-power supply power so that the construction machinery is in the first power supply state. Calculate the difference between the power-dragging supply power and the low-power supply power to obtain the second charging power. Control the power-dragging module to charge the battery module at the second charging power, and update the remaining power signal in real time. When the updated remaining power signal indicates that the remaining power of the battery module is not less than a preset second power threshold, calculate the difference between the motor target power and the power-dragging supply power to obtain the battery supply power. Control the battery module to supply power to the construction machinery at the battery supply power, and control the power-dragging module to supply power to the construction machinery at the power-dragging supply power so that the construction machinery is in the second power supply state;

[0162] Among them, the low-power supply power is less than the power-dragging supply power, and the second power threshold is greater than the first power threshold.

[0163] It can be seen that in this optional embodiment, when the remaining power of the battery module is sufficient, the power-dragging module and the battery module jointly supply power to the power motor of the construction machinery so that the power motor operates at the target power, ensuring the working efficiency of the construction machinery. When the remaining power of the battery module is insufficient, the power-dragging module supplies power to the power motor at a lower power and charges the battery module at the same time. When the remaining power of the battery module recovers to a certain threshold, switch to jointly supplying power to the power motor of the construction machinery by the power-dragging module and the battery module so that the power motor operates at the target power, ensuring the working efficiency of the construction machinery.

[0164] It can be understood that the specific values of the first power threshold and the second power threshold can be set according to the actual application scenario requirements. In another optional embodiment, the first power threshold is set to 15%, and the second power threshold is set to 20%. Determining the current power supply state of the construction machinery according to the remaining power signal, the motor target power, and the power-dragging supply power can be specifically as follows: when the remaining power of the battery module is at least 15%, the power-dragging module and the battery module jointly supply power to the power motor of the construction machinery so that the power motor operates at the target power, ensuring the working efficiency of the construction machinery. When the remaining power of the battery module is lower than 15%, the power-dragging module supplies power to the power motor at a lower power and charges the battery module at the same time. When the battery is charged to 20% of the power, switch to jointly supplying power to the power battery of the construction machinery by the power-dragging module and the battery module so that the power motor operates at the target power, ensuring the working efficiency of the construction machinery.

[0165] In another optional embodiment, the construction machinery is further configured with a charging module, and the charging module is used to connect to an external charging device to charge the battery module;

[0166] Please refer to Figure 4 ,Figure 4 It is a schematic structural diagram of another power supply control device applied to construction machinery disclosed in an embodiment of the present invention. As Figure 4 shown, a power supply control device applied to construction machinery disclosed in an embodiment of the present invention further includes:

[0167] A fourth signal acquisition module 208, configured to, after a power supply mode determination module 203 determines the current power supply mode of the construction machinery according to a power take-off switch signal and a grid connection signal, when the construction machinery is in a pure electric power supply mode, after receiving a motor start signal of a power motor of the construction machinery, detect a connection state between a charging module and an external charging device to obtain a charging connection signal; the motor start signal is generated according to a human-machine interaction operation at a previous moment;

[0168] A working state control module 209, configured to control the working state of the construction machinery according to the charging connection signal and the motor start signal.

[0169] This optional embodiment first detects whether the construction machinery is connected to an external charging device (such as a charging pile) before starting the power motor of the construction machinery, and then determines the working state of the construction machinery according to the connection situation of the external charging device and the motor start signal.

[0170] In another optional embodiment, the specific manner in which the working state control module 209 controls the working state of the construction machinery according to the charging connection signal and the motor start signal includes:

[0171] If the charging connection signal indicates an electrical connection between the charging module and the external charging device, charge the battery module through the charging module so that the construction machinery enters a charging state; wherein, when the construction machinery is in the charging state, the power motor of the construction machinery does not start;

[0172] If the charging connection signal indicates an electrical disconnection between the charging module and the external charging device, start the power motor of the construction machinery according to the motor start signal so that the construction machinery enters an operating state.

[0173] It can be seen that this optional embodiment controls the construction machinery to enter a charging state when the construction machinery is connected to an external charging device, ignoring the motor start signal, so as to ensure normal charging of the construction machinery; when the construction machinery is not connected to an external charging device, it responds to the motor start signal to start the power motor of the construction machinery, so that the construction machinery normally enters an operating state.

[0174] In yet another alternative embodiment, the power supply control device is further configured with an environmental perception module. The environmental perception module is used to collect in real time the environmental parameters of the construction machinery. The environmental parameters include environmental temperature, humidity, and altitude. In the trailer power supply mode, if it is detected that the environmental temperature is lower than a preset low temperature threshold or higher than a preset high temperature threshold, the temperature control compensation mechanism of the trailer power supply module is activated to adjust the output power of the trailer power supply module to a preset rated power range. At the same time, according to the temperature difference between the environmental temperature and the current temperature of the battery module, the charging power of the trailer power supply module to the battery module is controlled to avoid large current charging and discharging of the battery under extreme temperatures. If the altitude exceeds a preset plateau threshold, the output power of the trailer power supply module is corrected according to the barometric sensor data, and the upper limit of the discharge power of the battery module is reduced to adapt to the working condition of reduced heat dissipation efficiency in the plateau low-oxygen environment. Further, the environmental perception module is linked with the power supply state control module. When the environmental humidity exceeds a preset humidity threshold, the insulation monitoring function of the trailer power supply module is automatically enabled, and the insulation resistance value of the trailer power cable is periodically detected. If the insulation resistance value is lower than the safety threshold, it is forced to switch to the pure electric power supply mode and an alarm signal is triggered.

[0175] It can be seen that through the multi-dimensional perception of environmental parameters in this alternative embodiment, the power supply system realizes the adaptive adjustment to complex working conditions, significantly improving the power supply stability and safety of construction machinery in harsh environments.

[0176] In yet another alternative embodiment, the power supply control device further includes a fault self-diagnosis module. The fault self-diagnosis module is used to, in the trailer power supply mode, if it is detected that the output voltage of the trailer power supply module continuously remains lower than 90% of the rated voltage and the duration exceeds a preset monitoring duration, determine that the grid voltage is abnormal, automatically switch to the pure electric power supply mode, and record the fault code. In the pure electric power supply mode, if the voltage drop rate of the battery module exceeds a preset drop threshold, a battery short-circuit detection process is triggered, the connection between the battery module and the power motor is disconnected, and the minimum power consumption operation of the control system is maintained through a backup capacitor. Further, the fault self-diagnosis module is communicatively connected with a remote monitoring platform. When a serious fault (such as battery thermal runaway or trailer power cable breakage) is detected, the positioning information and fault details are automatically sent to the remote monitoring platform, and an emergency shutdown instruction is executed.

[0177] It can be seen that through the multi-level fault diagnosis and emergency response mechanism in this alternative embodiment, the risk of operation interruption caused by power supply system faults is greatly reduced, and at the same time, accurate fault location support is provided for maintenance personnel.

[0178] In yet another alternative embodiment, the power supply control device is further configured with a human-computer interaction optimization module, and multi-level power supply status indicators are provided in the cab of the construction machinery. Among them, the color of the first indicator represents the current power supply mode (for example, green for towed power supply and blue for pure electric power supply), the blinking frequency of the second indicator represents the remaining battery power, and the brightness of the third indicator represents the real-time load rate of the towed power module; in addition, a manual override function for the power supply mode is provided through the touch screen: when the operator long-presses the "mode switch" button for more than 3 seconds, the specified power supply mode can be forced to enter, and at the same time, the system records the manual operation log for subsequent analysis; for advanced users, the human-computer interaction interface also provides a custom interface for power supply strategies, allowing setting parameters such as battery charging thresholds and upper limits of towed power, and supporting the import of preset operation scenario templates (such as "continuous operation mode" or "energy-saving mode").

[0179] It can be seen that this alternative embodiment enhances the controllability of the operator over the power supply system through an intuitive interaction design and flexible configuration options, while reducing the probability of misoperation.

[0180] Embodiment III

[0181] Please refer to Figure 5 , Figure 5 which is a schematic structural diagram of another power supply control device applied to construction machinery disclosed in the embodiments of the present invention. Figure 5 The power supply control device shown can execute the power supply control method described in Embodiment I. This power supply control device can improve the power supply method of construction machinery to enhance the applicability of construction machinery to different types of working scenarios. Further, this power supply control device can be integrated into the power system of construction machinery or exist independently of the power system of construction machinery, which is not limited in the embodiments of the present invention. As Figure 5 shown, a power supply control device applied to construction machinery disclosed in the embodiments of the present invention includes but is not limited to:

[0182] A memory 301 storing executable program code;

[0183] A processor 302 coupled to the memory 301;

[0184] The processor 302 calls the executable program code stored in the memory 301 and executes some or all of the steps in the power supply control method applied to construction machinery described in Embodiment I of the present invention.

[0185] Embodiment IV

[0186] The embodiments of the present invention disclose a computer storage medium. The computer storage medium stores computer instructions, and when the computer instructions are called by a processor, they are used to execute some or all of the steps in the power supply control method applied to construction machinery described in Embodiment I of the present invention.

[0187] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules. They may be located in one place or distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0188] Through the above specific descriptions of the embodiments, those skilled in the art can clearly understand that each implementation can be achieved by means of software plus a necessary general hardware platform, and of course, it can also be achieved by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, including read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc memories, magnetic disk memories, tape memories, or any other computer-readable medium that can be used to carry or store data.

[0189] Finally, it should be noted that the technical content disclosed in the embodiments of the present invention is only the preferred embodiments of the present invention, only for explaining the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power supply control method applied to engineering machinery, characterized in that: The engineering machine is equipped with a battery module and a tow power module, the battery module is used to store electric energy, and the tow power module is used to connect to an external power grid. The method includes: Acquire a pre-stored power-on switch signal; the power-on switch signal is generated according to a human-computer interaction operation at a previous moment, and the power-on switch signal is used to indicate that the power-on module is in a working state or a standby state; Detecting the connection status between the power-pulling module and the external power grid to obtain a power grid connection signal; The current power supply mode of the engineering machinery is determined according to the towing power switch signal and the grid connection signal; the current power supply mode includes a pure electric power supply mode or a towing power supply mode, the pure electric power supply mode is a mode in which power is supplied by the battery module, and the power supply module corresponding to the towing power supply mode includes at least the towing power module.

2. A power supply control method for engineering machinery according to claim 1, characterized in that: The determining the current power supply mode of the engineering machinery according to the towing switch signal and the grid connection signal includes: If the towing power switch signal indicates that the towing power module is in a standby state, it is determined that the engineering machinery is in a pure electric power supply mode; If the towing switch signal indicates that the towing module is in a working state, and the grid connection signal indicates that the towing module is electrically disconnected from the external grid, it is determined that the construction machinery is in a pure electric power supply mode; If the towing switch signal indicates that the towing module is in working state, and the grid connection signal indicates that the towing module is electrically connected to the external grid, it is determined that the construction machinery is in the towing power supply mode.

3. The power supply control method for engineering machinery according to claim 1, characterized in that: After determining the current power supply mode of the engineering machinery according to the towing switch signal and the grid connection signal, the method further includes: When the engineering machine is in the towing power supply mode, a motor start signal is obtained, and a power motor of the engineering machine is started according to the motor start signal, so that the engineering machine enters an operating state; the motor start signal is generated according to a human-machine interaction operation at a previous moment; Calculating the target operating power of the power motor of the engineering machinery to obtain the motor target power; Calculating the output power of the power-supply module to obtain the power-supply power; Determine the current power supply state corresponding to the engineering machinery according to the motor target power and the traction power supply power; The current power supply state includes a first power supply state and a second power supply state, the first power supply state is a state of supplying power through the tow power module, and the second power supply state is a state of supplying power through the tow power module and the battery module.

4. The power supply control method for engineering machinery according to claim 3, characterized in that: The determining the current power supply state corresponding to the engineering machinery according to the motor target power and the traction power supply power includes: If the motor target power is less than the towing power supply power, it is determined that the engineering machine is in a first power supply state, and a remaining power signal of the battery module is obtained. If the remaining power signal indicates that the battery module is not fully charged, a difference between the towing power supply power and the motor target power is calculated to obtain a first charging power, and the towing power module is controlled to charge the battery module with the first charging power. If the motor target power is equal to the towing power supply power, it is determined that the engineering machinery is in the first power supply state; If the motor target power is greater than the towing power supply power, the remaining power signal of the battery module is obtained, and the current power supply state of the engineering machinery is determined according to the remaining power signal, the motor target power and the towing power supply power.

5. The power supply control method for engineering machinery according to claim 4, characterized in that: The determining the current power supply state of the engineering machinery according to the remaining power signal, the motor target power and the traction power supply power includes: If the remaining power signal indicates that the remaining power of the battery module is not less than a preset first power threshold, the difference between the motor target power and the towing power supply power is calculated to obtain the battery power supply power, and the battery module is controlled to supply power to the engineering machine with the battery power supply power, and the towing power module is controlled to supply power to the engineering machine with the towing power supply power, so that the engineering machine is in a second power supply state; If the remaining power signal indicates that the remaining power of the battery module is less than a preset first power threshold, the towing power module is controlled to power the engineering machine with a preset low-consumption power supply so that the engineering machine is in a first power supply state, the difference between the towing power supply power and the low-consumption power supply power is calculated to obtain a second charging power, the towing power module is controlled to charge the battery module with the second charging power, and the remaining power signal is updated in real time. When the updated remaining power signal indicates that the remaining power of the battery module is not less than the preset second power threshold, the difference between the motor target power and the towing power supply power is calculated to obtain the battery power supply power, the battery module is controlled to power the engineering machine with the battery power supply, and the towing power module is controlled to power the engineering machine with the towing power supply power so that the engineering machine is in a second power supply state; The low-consumption power supply power is less than the drag power supply power, and the second power threshold is greater than the first power threshold.

6. The power supply control method for engineering machinery according to claim 1, characterized in that: The engineering machine is also equipped with a charging module, which is used to connect to an external charging device to charge the battery module; After determining the current power supply mode of the engineering machinery according to the towing switch signal and the grid connection signal, the method further includes: When the engineering machine is in the pure electric power supply mode, after receiving the motor start signal of the power motor of the engineering machine, the connection state between the charging module and the external charging device is detected to obtain a charging connection signal; the motor start signal is generated according to the human-machine interaction operation at the previous moment; The working state of the engineering machine is controlled according to the charging connection signal and the motor start signal.

7. A power supply control method for engineering machinery according to claim 6, characterized in that: The controlling the working state of the engineering machine according to the charging connection signal and the motor start signal comprises: If the charging connection signal indicates that the charging module is electrically connected to the external charging device, the battery module is charged by the charging module so that the engineering machine enters a charging state; wherein when the engineering machine is in the charging state, the power motor of the engineering machine is not started; If the charging connection signal indicates that the charging module is electrically disconnected from the external charging device, the power motor of the engineering machine is started according to the motor start signal, so that the engineering machine enters an operating state.

8. A power supply control device applied to engineering machinery, characterized in that: The engineering machinery is equipped with a battery module and a tow power module, the battery module is used to store electric energy, and the tow power module is used to connect to an external power grid. The device includes: A first signal acquisition module is used to acquire a pre-stored towing switch signal; the towing switch signal is generated according to a human-computer interaction operation at a previous moment, and the towing switch signal is used to indicate that the towing module is in a working state or a standby state; A second signal acquisition module is used to detect the connection status between the power-pulling module and the external power grid, and obtain a power grid connection signal; A power supply mode determination module is used to determine the current power supply mode of the engineering machinery according to the towing power switch signal and the grid connection signal; the current power supply mode includes a pure electric power supply mode or a towing power supply mode, the pure electric power supply mode is a mode of supplying power through the battery module, and the power supply module corresponding to the towing power supply mode includes at least the towing power module.

9. A power supply control device applied to engineering machinery, characterized in that: The device comprises: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the power supply control method applied to engineering machinery as described in any one of claims 1 to 7.

10. A computer storage medium, characterized in that: The computer storage medium stores computer instructions, and when the computer instructions are called by the processor, they are used to execute the power supply control method applied to engineering machinery as described in any one of claims 1 to 7.

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