Method, device and processor for determining working duration of electric engineering equipment

Abstract

Embodiments of the present invention provide a method, device, and processor for determining the operating time of electric engineering equipment, belonging to the field of engineering machinery technology. The electric engineering equipment includes a battery, a battery management system, a motor, a motor controller, and an electronic monitor. The method for determining the operating time of the electric engineering equipment includes: obtaining a first duration during which the output current of the battery exceeds a preset current threshold value as uploaded by the battery management system, a second duration during which the motor operates as uploaded by the motor controller, and a third duration during which the electric engineering equipment operates as uploaded by the electronic monitor; and determining the actual operating time of the electric engineering equipment based on the first, second, and third durations. Embodiments of the present invention can improve the accuracy of operating time.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a method, device and processor for determining the operating time of electric engineering equipment. Background Art

[0002] In the prior art, electric engineering equipment (such as electric excavators) often needs to record and display operating hours for reference during maintenance and to determine the residual value of the equipment. Currently, this is typically done using electronic monitors. However, if the electronic monitor is damaged, the replacement monitor will start counting from zero, resulting in inaccurate recorded operating hours. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a method, device, processor and electric engineering equipment for determining the working time of electric engineering equipment, so as to solve the problem of inaccurate working time in the prior art.

[0004] To achieve the above objectives, a first aspect of an embodiment of the present invention provides a method for determining the operating time of electric engineering equipment, wherein the electric engineering equipment includes a battery, a battery management system, a motor, a motor controller, and an electronic monitor, and the method includes:

[0005] Obtaining a first duration during which the output current of the battery exceeds a preset current threshold value, as uploaded by the battery management system, a second duration during which the motor operates, as uploaded by the motor controller, and a third duration during which the electric engineering equipment operates, as uploaded by the electronic monitor;

[0006] The actual working time of the electric engineering equipment is determined according to the first time period, the second time period, and the third time period.

[0007] In an embodiment of the present invention, the actual working time of the electric engineering equipment is determined based on the first time length, the second time length and the third time length, including: determining a first time length difference between the first time length and the second time length, a second time length difference between the second time length and the third time length, and a third time length difference between the first time length and the third time length; determining the actual working time based on the first time length difference, the second time length difference, the third time length difference and a preset difference range.

[0008] In an embodiment of the present invention, the actual working time is determined based on the first duration difference, the second duration difference, the third duration difference and the preset difference range, including: determining the fourth duration difference based on the first duration difference, the second duration difference, the third duration difference and the preset difference range, wherein the fourth duration difference is the duration difference among the first duration difference, the second duration difference and the third duration difference that is within the preset difference range; determining the number of fourth duration differences; and determining the actual working time based on the number and the duration corresponding to the fourth duration difference.

[0009] In an embodiment of the present invention, the actual working time is determined based on the time corresponding to the difference between the quantity and the fourth time, including: determining the quantity to be three; determining the maximum of the first time, the second time, and the third time to obtain the actual working time.

[0010] In an embodiment of the present invention, the actual working time is determined based on the time corresponding to the quantity and the fourth time difference, including: determining the quantity to be one; determining the larger of the two time corresponding to the fourth time difference to obtain the actual working time.

[0011] In an embodiment of the present invention, the actual working time is determined based on the time corresponding to the quantity and the fourth time difference, including: determining the quantity to be two; determining the first mean and the second mean of the two time corresponding to the fourth time difference of two; determining the average of the first mean and the second mean to obtain the actual working time.

[0012] In an embodiment of the present invention, the method further includes: issuing a fault prompt when it is determined that the number is zero.

[0013] In an embodiment of the present invention, the preset current threshold value ranges from 15A to 25A.

[0014] In the embodiment of the present invention, the preset difference range includes 0 to 6 hours.

[0015] A second aspect of an embodiment of the present invention provides a processor configured to execute the above-mentioned method for determining the working time of electric engineering equipment.

[0016] A third aspect of an embodiment of the present invention provides an apparatus for determining the operating time of electric engineering equipment, comprising: a processor according to the above.

[0017] A fourth aspect of an embodiment of the present invention provides an electric engineering equipment, comprising: a battery and a battery management system; a motor and a motor controller; an electronic monitor; and a device for determining the operating time of the electric engineering equipment according to the above.

[0018] Through the above technical solution, by obtaining the first duration of time that the battery output current exceeds the preset current threshold value as uploaded by the battery management system, the second duration of time that the motor is operating as uploaded by the motor controller, and the third duration of time that the electric engineering equipment is operating as uploaded by the electronic monitor, the actual operating time of the electric engineering equipment is determined based on the first, second, and third durations. The above solution avoids the problem of low accuracy in the prior art of obtaining the operating time of the electric engineering equipment only from the electronic monitor. In addition to obtaining the operating time from the electronic monitor, corresponding time data is also obtained from the battery management system and the motor controller. The actual operating time of the electric engineering equipment is determined based on the multiple time data, thereby improving the accuracy of the operating time of the electric engineering equipment and reducing the dependence on the electronic monitor.

[0019] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present invention, but do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0021] Figure 1 The flowchart of the method for determining the working time of electric engineering equipment in one embodiment of the present invention is schematically shown. DETAILED DESCRIPTION

[0022] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not used to limit the embodiment of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] Figure 1 The following schematically shows a flow chart of a method for determining the working time of electric engineering equipment in one embodiment of the present invention. Figure 1 As shown, in an embodiment of the present invention, a method for determining the operating time of electric engineering equipment is provided. The electric engineering equipment includes a battery, a battery management system, a motor, a motor controller, and an electronic monitor. The method is described by taking the application of the method to a processor as an example. The method may include the following steps:

[0026] Step S102 , obtaining the first duration of the battery output current exceeding the preset current threshold value uploaded by the battery management system, the second duration of the motor operation uploaded by the motor controller, and the third duration of the electric engineering equipment operation uploaded by the electronic monitor.

[0027] Step S104: determining the actual working time of the electric engineering equipment according to the first time duration, the second time duration, and the third time duration.

[0028] It is understandable that the battery management system generally refers to the BMS battery system, which is commonly known as the battery nanny or battery butler. Its main function is to intelligently manage and maintain each battery unit, prevent the battery from overcharging and over-discharging, extend the battery life, and monitor the battery status. For example, it monitors the output current of the battery and can record the length of time that the output current is greater than a certain threshold. The preset current threshold is a preset threshold of the output current of the battery, such as 20A. The first duration is the length of time that the output current of the battery determined by the battery management system exceeds the preset current threshold. The motor controller can control the motor to work, and the second duration is the working duration of the motor determined by the motor controller. The third duration is the working duration of the electric engineering equipment monitored and recorded by the electronic monitor. It is understandable that the working duration of the electric engineering equipment is the length of time when the electric engineering equipment is in working state. For example, when the electric engineering equipment is in charging state, it is not in working state.

[0029] Specifically, the processor can obtain the first duration of time when the output current of the battery exceeds the preset current threshold uploaded by the battery management system, the second duration of time when the motor works uploaded by the motor controller, and the third duration of time when the electric engineering equipment works uploaded by the electronic monitor, and determine the actual working time of the electric engineering equipment based on the first duration, the second duration and the third duration. For example, the difference between the first duration, the second duration and the third duration can be compared, and the average of the two durations with the smallest difference can be taken as the actual working time of the electric engineering equipment.

[0030] The above-mentioned method for determining the operating time of electric engineering equipment obtains a first duration during which the battery's output current exceeds a preset current threshold, as uploaded by the battery management system; a second duration during which the motor operates, as uploaded by the motor controller; and a third duration during which the electric engineering equipment operates, as uploaded by the electronic monitor. The method then determines the actual operating time of the electric engineering equipment based on the first, second, and third durations. This method avoids the low accuracy of the prior art method of obtaining the operating time of electric engineering equipment solely from the electronic monitor. In addition to obtaining the operating time from the electronic monitor, the method also obtains corresponding duration data from the battery management system and the motor controller. The actual operating time of the electric engineering equipment is determined based on this multiple duration data, thereby improving the accuracy of the operating time of the electric engineering equipment and reducing reliance on the electronic monitor.

[0031] In one embodiment, the actual working time of the electric engineering equipment is determined based on the first time length, the second time length and the third time length, including: determining a first time length difference between the first time length and the second time length, a second time length difference between the second time length and the third time length, and a third time length difference between the first time length and the third time length; determining the actual working time based on the first time length difference, the second time length difference, the third time length difference and a preset difference range.

[0032] It is understood that the first duration difference is the difference between the first duration and the second duration, the second duration difference is the difference between the second duration and the third duration, and the third duration difference is the difference between the first duration and the third duration. The preset difference range is a smaller range of the differences between the preset durations, which can be set according to the actual application scenario, for example, 0 to 8 hours.

[0033] Specifically, the processor can determine the first duration difference between the first duration and the second duration, the second duration difference between the second duration and the third duration, and the third duration difference between the first duration and the third duration, and determine the actual working time based on the first duration difference, the second duration difference, the third duration difference and the preset difference range. For example, the first duration difference, the second duration difference, and the third duration difference are compared with the preset difference range. If any of the first duration difference, the second duration difference, and the third duration difference is within the preset difference range, the duration corresponding to the duration difference within the preset difference range can be averaged. For example, if the first duration difference, the second duration difference, and the third duration difference are all within the preset difference range, the first duration, the second duration, and the third duration can be averaged, so that the result obtained after the averaging process can be used as the actual working time of the electric engineering equipment. For another example, if the first duration difference and the second duration difference are within a preset difference range, and the third duration difference is not within the preset difference range, then the first duration and the second duration corresponding to the first duration difference can be averaged to obtain a first average, and the second duration and the third duration corresponding to the second duration difference can be averaged to obtain a second average, and the average of the first and second averages can be calculated to obtain the actual operating time of the electric engineering equipment. For another example, if the third duration difference is within a preset difference range, and the first and second duration differences are not within the preset difference range, then the average of the first and third durations corresponding to the third duration difference can be determined to obtain the actual operating time of the electric engineering equipment.

[0034] In an embodiment of the present application, by determining the duration difference between each duration and comparing each duration difference with a preset difference range, the duration data whose duration difference is not within the preset difference range is eliminated, and the actual working duration of the electric engineering equipment can be determined based on the duration data whose duration difference is within the preset difference range, thereby further improving the accuracy of the actual working duration.

[0035] In one embodiment, the actual working time is determined based on the first duration difference, the second duration difference, the third duration difference and the preset difference range, including: determining the fourth duration difference based on the first duration difference, the second duration difference, the third duration difference and the preset difference range, wherein the fourth duration difference is the duration difference among the first duration difference, the second duration difference and the third duration difference that is within the preset difference range; determining the number of fourth duration differences; and determining the actual working time based on the number and the duration corresponding to the fourth duration difference.

[0036] It can be understood that the fourth duration difference is a duration difference within the preset difference range among the first duration difference, the second duration difference and the third duration difference, and the number of the fourth duration differences can be 0, 1, 2 or 3.

[0037] Specifically, the processor can determine the fourth duration difference based on the first duration difference, the second duration difference, the third duration difference and the preset difference range, that is, determine the duration difference among the first duration difference, the second duration difference and the third duration difference that is within the preset difference range, thereby obtaining the fourth duration difference, and determining the number of the fourth duration differences, and then determining the actual working time based on the number of the fourth duration differences and the duration corresponding to the fourth duration difference.

[0038] In an embodiment of the present application, by determining the number of fourth duration differences, the actual working time of the electric engineering equipment is determined based on the number of fourth duration differences and the duration corresponding to the fourth duration differences, thereby further improving the accuracy of the actual working time.

[0039] In one embodiment, the actual working time is determined based on the time corresponding to the difference between the quantity and the fourth time, including: determining the quantity to be three; determining the maximum of the first time, the second time, and the third time to obtain the actual working time.

[0040] Specifically, when the number of fourth duration differences is three, that is, the differences between the first duration, the second duration, and the third duration are all within the preset difference range, that is, the differences between the three durations are small, and then the largest of the first duration, the second duration, and the third duration can be determined and determined as the actual operating time of the electric engineering equipment. Furthermore, the actual operating time of the electric engineering equipment can be displayed for the user to view.

[0041] In one embodiment, the actual working time is determined based on the quantity and the time corresponding to the fourth time difference, including: determining the quantity to be one; and determining the larger of the two time corresponding to the fourth time difference to obtain the actual working time.

[0042] Specifically, when the number of the fourth time difference is one, it means that the difference between two time lengths among the first time length, the second time length and the third time length is within the preset difference range, and the difference between the other time length and these two time lengths is large. The larger of the two time lengths can be determined, and the larger one can be determined as the actual working time of the electric engineering equipment.

[0043] In one embodiment, the actual working time is determined based on the time corresponding to the quantity and the fourth time difference, including: determining the quantity to be two; determining the first mean and the second mean of the two time corresponding to the fourth time difference of two; determining the average of the first mean and the second mean to obtain the actual working time.

[0044] It can be understood that the first mean and the second mean are the means between the two durations corresponding to the two fourth duration differences respectively.

[0045] Specifically, when the number of the fourth time length difference is two, it means that the difference between two adjacent time lengths in the first time length, the second time length and the third time length is within the preset difference range, and the difference between non-adjacent time lengths is large and exceeds the preset difference range. At this time, the average value of each two adjacent time lengths can be determined to obtain the first mean and the second mean, and the first mean and the second mean can continue to be averaged to obtain the actual working time of the electric engineering equipment.

[0046] In one embodiment, the method for determining the operating hours of electric engineering equipment further includes: issuing a fault prompt when the determined number is zero.

[0047] It can be understood that when the number of the fourth time difference is zero, it means that the differences between the first time, the second time and the third time are not within the preset difference range, that is, the differences between the three time lengths are large. At this time, the processor can issue a fault prompt to remind the user that there are faults in the battery management system, motor controller and electronic monitor.

[0048] In one embodiment, the preset current threshold value ranges from 15A to 25A.

[0049] In one embodiment, the preset difference range includes 0 to 6 hours.

[0050] In the prior art, the working hours of electric engineering equipment are usually read from an electronic monitor. If the electronic monitor is damaged, the correct working hours cannot be read, causing a lot of inconvenience to after-sales work.

[0051] In a specific embodiment, taking an electric excavator as an example, a method for determining the working time of electric engineering equipment is provided, which specifically includes the following steps:

[0052] (1) The vehicle is powered on and the instrument reads the data from each subsystem.

[0053] (2) The battery management system (BMS) reports the time A during which the battery output current is above 20A, the motor controller reports the motor operating time B, and the electronic monitor reports the stored operating time C.

[0054] (3) Compare the three values of A, B, and C. If the difference between the three values is less than 6 hours, then the three data are considered to be true and reliable. Take the largest number among the three values and name it D. Then rewrite the three values of A, B, and C to the maximum value D, and display the maximum value D as the working time (i.e., the actual working time of the electric engineering equipment).

[0055] (4) If the difference between the values of A, B, and C is greater than 6 hours, it can be divided into the following two cases:

[0056] (i) If two of the three values are close and within 6 hours of each other, and only one value has a large deviation, the two values with the larger deviation are considered credible, while the value with the larger deviation is not credible. The larger of the two similar values is selected and named D. All three values A, B, and C are rewritten as D and displayed as the operating hours (i.e., the actual operating hours of the electric engineering equipment). Furthermore, a display may be displayed indicating that the counter corresponding to the value with the larger deviation is abnormal.

[0057] (ii) The three values A, B, and C differ greatly, and the difference between any two values is more than 6 hours. In this case, it is considered that the three counters cannot complete the counting work, and a fault is displayed in the position where the working time is displayed on the display, and after-sales personnel are required to perform maintenance.

[0058] The technical solution provided by the embodiment of the present invention has the following advantages:

[0059] 1. High reliability. This solution uses data including the actual operating time of the motor recorded by the motor controller, the time when the battery output current is greater than 20A recorded by the battery management system (BMS), and the operating time recorded by the electronic monitor. These three recording sources are different and will not interfere with each other, making the final operating time more accurate.

[0060] 2. Strong tamper resistance. This solution collects data from the battery management system (BMS) and the motor controller (MCU). These two systems are the most valuable in electric excavators. This greatly increases the cost of tampering with data or replacing recording equipment, which helps ensure data authenticity.

[0061] An embodiment of the present invention provides a processor configured to execute the method for determining the working time of electric engineering equipment according to the above embodiment.

[0062] An embodiment of the present invention provides a device for determining the working time of electric engineering equipment, including: a processor according to the above embodiment.

[0063] An embodiment of the present invention provides an electric engineering equipment, including: a battery and a battery management system; a motor and a motor controller; an electronic monitor; and a device for determining the operating time of the electric engineering equipment according to the above embodiment.

[0064] The above-mentioned device for determining the working time of electric engineering equipment includes a processor and a memory, and the processor executes the program unit stored in the memory to realize the corresponding function.

[0065] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be configured, and the accuracy of the operating time of the electric engineering equipment can be improved by adjusting the kernel parameters.

[0066] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0067] An embodiment of the present invention provides a storage medium having a program stored thereon. When the program is executed by a processor, the method for determining the operating time of electric engineering equipment in the above embodiment is implemented.

[0068] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program initialized with the above-mentioned method steps for determining the working time of electric engineering equipment.

[0069] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0070] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0071] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0072] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0073] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0074] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0075] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0076] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0077] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A method for determining the working time of electric engineering equipment, characterized in that: The electric engineering equipment includes a battery, a battery management system, a motor, a motor controller, and an electronic monitor, and the method includes: Obtaining a first duration during which the output current of the battery exceeds a preset current threshold value, as uploaded by the battery management system, a second duration during which the motor operates, as uploaded by the motor controller, and a third duration during which the electric engineering equipment operates, as uploaded by the electronic monitor; The actual working time of the electric engineering equipment is determined according to the first time period, the second time period, and the third time period.

2. The method according to claim 1, characterized in that Determining the actual working time of the electric engineering equipment according to the first time period, the second time period, and the third time period includes: Determining a first duration difference between the first duration and the second duration, a second duration difference between the second duration and the third duration, and a third duration difference between the first duration and the third duration; The actual working time is determined according to the first time difference, the second time difference, the third time difference and a preset difference range.

3. The method according to claim 2, characterized in that The determining the actual working time according to the first time difference, the second time difference, the third time difference, and a preset difference range includes: Determining a fourth duration difference according to the first duration difference, the second duration difference, the third duration difference, and a preset difference range, wherein the fourth duration difference is a duration difference among the first duration difference, the second duration difference, and the third duration difference that is within the preset difference range; determining the number of the fourth duration differences; The actual working time is determined according to the time corresponding to the quantity and the fourth time difference.

4. The method according to claim 3, characterized in that The determining the actual working time according to the time corresponding to the difference between the quantity and the fourth time includes: determining said quantity to be three; The maximum of the first duration, the second duration, and the third duration is determined to obtain the actual working duration.

5. The method according to claim 3, characterized in that The determining the actual working time according to the time corresponding to the difference between the quantity and the fourth time includes: determining said quantity to be one; Determine the larger of the two durations corresponding to the fourth duration difference to obtain the actual working duration.

6. The method according to claim 3, characterized in that The determining the actual working time according to the time corresponding to the difference between the quantity and the fourth time includes: determining said quantity to be two; Determine a first mean and a second mean of two durations corresponding to the two fourth duration differences; An average of the first mean and the second mean is determined to obtain the actual working time.

7. The method according to claim 3, characterized in that The method further comprises: If it is determined that the number is zero, a fault prompt is issued.

8. The method according to claim 1, characterized in that The preset current threshold value ranges from 15A to 25A.

9. The method according to claim 2, characterized in that The preset difference range includes 0 to 6 hours.

10. A processor, characterized in that: The device is configured to execute the method for determining the working time of electric engineering equipment according to any one of claims 1 to 9.

11. A device for determining the working time of electric engineering equipment, characterized in that: include: The processor according to claim 10.

12. An electric engineering equipment, characterized in that: include: Batteries and battery management systems; Motors and motor controllers; electronic monitors; as well as The device for determining the operating time of electric engineering equipment according to claim 11.

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