Charging control method and device for pure electric tractor, electronic equipment and medium

Abstract

The invention relates to a pure electric tractor charging control method and device, electronic equipment and a medium, and the method comprises the steps: calculating a deviation value between a first battery SOC (State of Charge) corresponding to a pure electric tractor and a preset second battery SOC when the pure electric tractor has a vehicle use demand within the remaining full charging time corresponding to the current charging and discharging times; when the deviation value is larger than a set threshold value, the battery of the pure electric tractor is controlled to be charged according to a first charging strategy, and when the deviation value is not larger than the set threshold value or the second battery SOC cannot be obtained, the battery of the pure electric tractor is controlled to be charged according to a second charging strategy. By means of the method, on the premise that the precision of the SOC of the battery is guaranteed, the charging time is selectively shortened, and the pure electric tractor can be used for the working condition for a longer time in the using process of the whole machine in the continuous working condition.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to a charging control method, device, electronic equipment and medium for a pure electric tractor. Background Art

[0002] At present, pure electric tractors have insufficient power due to the limitation of battery installation space. For long-term operation conditions, rapid power replenishment is required. In order to reduce costs, pure electric tractors mostly use lithium iron phosphate system cells. The maximum charging power of the battery is generally around 1C (C: charge and discharge rate). When the battery is almost full, not only is the charging power allowed to be small, resulting in a long charging time, but the amount of electricity charged is also small, which does not contribute significantly to the endurance of pure electric tractors, especially high-horsepower tractors. The charging time accounts for a large proportion of the continuous operation of the whole machine. In order to reduce the cumulative error of the battery SOC (battery power) calculated by the BMS (battery management system), the lithium iron phosphate system cells need to be fully charged or fully discharged during the charging or discharging process to reduce the error, which conflicts with the charging time, making the charging time of pure electric tractors too long, leaving no more time for operation conditions. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a pure electric tractor charging control method, device, electronic equipment and medium, aiming to solve at least one of the above problems.

[0004] In the first aspect, the technical solution of the present invention to solve the above technical problems is as follows:

[0005] A charging control method for a pure electric tractor, the method comprising:

[0006] When the pure electric tractor has a vehicle demand within the remaining full charge time corresponding to the current charge and discharge times, calculating a first battery SOC of the pure electric tractor corresponding to the current charge and discharge times;

[0007] Obtaining a preset second battery SOC, where the second battery SOC is a battery SOC corresponding to a preset open circuit voltage range;

[0008] When the second battery SOC is obtained, calculating a deviation value between the first battery SOC and the second battery SOC;

[0009] When the deviation value is greater than a set threshold, the battery of the pure electric tractor is controlled to be charged according to a first charging strategy, wherein the first charging strategy is a strategy for adjusting the SOC of the first battery based on the deviation value;

[0010] When the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, the battery of the pure electric tractor is controlled to be charged according to a second charging strategy, wherein the second charging strategy is a strategy for adjusting a cutoff voltage corresponding to the first battery SOC based on the number of charge and discharge times.

[0011] The beneficial effects of the present invention are as follows: based on the deviation value between the first battery SOC and the second battery SOC, different charging strategies are adopted to control the charging of the battery of the pure electric tractor, and under the premise of ensuring the accuracy of the battery SOC, the charging time is selectively shortened, so that the pure electric tractor has a longer time for operating conditions during the continuous working condition of the whole machine.

[0012] Based on the above technical solution, the present invention can also be improved as follows.

[0013] Further, the obtaining of a preset second battery SOC includes:

[0014] The second battery SOC corresponding to the preset open circuit voltage range is searched through a pre-established OCV table, wherein the OCV table includes battery SOCs corresponding to different open circuit voltages.

[0015] The beneficial effect of adopting the above further solution is that the preset open circuit voltage range refers to a voltage interval in which the battery voltage changes significantly when the battery SOC changes, and searching the second battery SOC within the preset open circuit voltage range can be more accurate.

[0016] Further, when the deviation value is greater than a set threshold, the battery of the pure electric tractor is controlled to be charged according to a first charging strategy, including:

[0017] When the deviation value is greater than a set threshold, the battery of the pure electric tractor is controlled to be charged based on the first battery SOC, and after charging, the first battery SOC is adjusted based on the deviation value.

[0018] The beneficial effect of adopting the above further solution is that when the deviation value is large, it indicates that the accuracy of the first battery SOC is poor, and the first battery SOC needs to be adjusted based on the deviation value after charging to ensure the accuracy of the first battery SOC.

[0019] Further, when the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, the battery of the pure electric tractor is controlled to be charged according to a second charging strategy, including:

[0020] When the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, determining whether the current charge and discharge times are greater than a set times;

[0021] If the current charge and discharge times are greater than the set times, the battery of the pure electric tractor is controlled to be charged based on the first battery SOC, and after charging, the first battery SOC is adjusted based on the deviation value;

[0022] If the current number of charge and discharge cycles is not greater than the set number of cycles, the cut-off voltage corresponding to the first battery SOC is adjusted to the set voltage, so as to control the battery of the pure electric tractor to be charged based on the adjusted cut-off voltage.

[0023] The beneficial effect of adopting the above further solution is that when the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, the cut-off voltage corresponding to the first battery SOC can be adjusted to shorten the charging time.

[0024] Furthermore, when the pure electric tractor has no vehicle demand within the remaining full charging time corresponding to the current number of charge and discharge times, the method further includes:

[0025] The battery of the pure electric tractor is controlled to be charged according to a first charging strategy.

[0026] The beneficial effect of adopting the above further solution is that when there is no vehicle demand, charging can be directly performed according to the first charging strategy to achieve a better charging effect.

[0027] In a second aspect, in order to solve the above technical problems, the present invention further provides a pure electric tractor charging control device, comprising:

[0028] A first battery SOC acquisition module is used to calculate the first battery SOC of the pure electric tractor corresponding to the current charge and discharge times when there is a demand for the vehicle within the remaining full charge time corresponding to the current charge and discharge times;

[0029] A second battery SOC acquisition module, used to acquire a preset second battery SOC, where the second battery SOC is a battery SOC corresponding to a preset open circuit voltage range;

[0030] a deviation value calculation module, configured to calculate a deviation value between the first battery SOC and the second battery SOC when the second battery SOC is acquired;

[0031] a first charging module, configured to control the battery of the pure electric tractor to be charged according to a first charging strategy when the deviation value is greater than a set threshold, wherein the first charging strategy is a strategy for adjusting the SOC of the first battery based on the deviation value;

[0032] The second charging module is used to control the battery of the pure electric tractor to be charged according to a second charging strategy when the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained. The second charging strategy is a strategy for adjusting the cut-off voltage corresponding to the first battery SOC based on the number of charge and discharge times.

[0033] In a third aspect, in order to solve the above-mentioned technical problem, the present invention also provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the pure electric tractor charging control method of the present application is implemented.

[0034] In a fourth aspect, in order to solve the above-mentioned technical problem, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the pure electric tractor charging control method of the present application is implemented.

[0035] In a fifth aspect, in order to solve the above technical problem, the present invention further provides a pure electric tractor, which comprises the electronic device described in the third aspect.

[0036] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments of the present invention are briefly introduced below.

[0038] Figure 1 A schematic flow chart of a charging control method for a pure electric tractor provided by an embodiment of the present invention;

[0039] Figure 2 A schematic flow chart of another pure electric tractor charging control method provided by an embodiment of the present invention;

[0040] Figure 3 A schematic structural diagram of a charging control device for a pure electric tractor provided by an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0043] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0044] The solution provided by the embodiment of the present invention can be applied to any application scenario where charging control of a pure electric tractor is required.

[0045] The embodiment of the present invention provides a possible implementation method, such as Figure 1 As shown, a flow chart of a pure electric tractor charging control method is provided, such as Figure 1 The method may include the following steps:

[0046] Step S10, when the pure electric tractor has a vehicle demand within the remaining full charging time corresponding to the current charge and discharge times, calculating the first battery SOC of the pure electric tractor corresponding to the current charge and discharge times;

[0047] Step S20, obtaining a preset second battery SOC, where the second battery SOC is a battery SOC corresponding to a preset open circuit voltage range;

[0048] Step S30, when the SOC of the second battery is obtained, calculating a deviation value between the SOC of the first battery and the SOC of the second battery;

[0049] Step S40, when the deviation value is greater than a set threshold, controlling the battery of the pure electric tractor to be charged according to a first charging strategy, wherein the first charging strategy is a strategy for adjusting the SOC of the first battery based on the deviation value;

[0050] Step S50, when the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, the battery of the pure electric tractor is controlled to be charged according to a second charging strategy, wherein the second charging strategy is a strategy for adjusting a cutoff voltage corresponding to the first battery SOC based on the number of charge and discharge times.

[0051] Through the method of the present invention, based on the deviation value between the first battery SOC and the second battery SOC, different charging strategies are adopted to control the charging of the battery of the pure electric tractor. Under the premise of ensuring the accuracy of the battery SOC, the charging time is selectively shortened, so that the pure electric tractor can be used for a longer time in the working condition during the continuous working condition of the whole machine.

[0052] The solution of the present invention is further described below in conjunction with the following specific embodiments. In this embodiment, it can be applied to a BMS system. This embodiment provides a pure electric tractor charging control method that may include the following steps:

[0053] Step S10, when the pure electric tractor has a vehicle demand within the remaining full charging time corresponding to the current charge and discharge times, calculating the first battery SOC of the pure electric tractor corresponding to the current charge and discharge times;

[0054] The current number of charge and discharge times refers to the cumulative value of the number of charge and discharge times, and the remaining full charge time refers to the time required to fully charge the battery during the charging process of the battery of the pure electric tractor.

[0055] Whether there is a need for a car can be determined based on the following methods:

[0056] Through big data statistical analysis, we learn about user usage habits. If the idle time after charging is greater than twice the charging time, it can be judged that there is no need to use the car after charging; otherwise, it is judged that there is a need to use the car.

[0057] After determining whether there is a need for a car, statistics can be made on the time periods when there is a need for a car and when there is no need for a car. The time periods when there is no need for a car are generally at night, and the time periods when there is a need for a car are generally during the day. Before a statistical regularity is formed or before the judgment value of irregularity is unified, it can be determined that there is a need for a car after charging.

[0058] Step S20, obtaining a preset second battery SOC, where the second battery SOC is a battery SOC corresponding to a preset open circuit voltage range;

[0059] Among them, the above-mentioned preset open circuit voltage range can be a voltage range corresponding to when the vehicle is stationary and the discharge current is less than 2A.

[0060] Optionally, the above S20, obtaining a preset second battery SOC, includes:

[0061] The second battery SOC corresponding to the preset open circuit voltage range is searched through a pre-established OCV table, wherein the OCV table includes battery SOCs corresponding to different open circuit voltages.

[0062] Specifically, the OCV table can be established based on the OCV curve of lithium iron phosphate. The OCV curve of lithium iron phosphate is relatively flat. When looking up the table, it is necessary to perform it in a specific voltage range. The preset open circuit voltage range is the voltage range corresponding to SOC <10% or >90%. At this time, the battery voltage changes significantly when the battery SOC changes. It can also be: when the vehicle is stationary and the discharge current is <2A, the corresponding voltage area, at this time, the second battery SOC can be calculated by looking up the table, and the judgment is more accurate at this time. If the battery charging and discharging interval is small and the voltage change is not obvious or cannot be calculated, no table lookup is performed.

[0063] If at least two second battery SOCs can be found based on the OCV table, the deviation value may be the maximum value of the deviation values ​​between the first battery SOC and each second battery SOC.

[0064] The data in the above OCV table can be established based on historical charging data. In the present application, the second battery SOC can be obtained from the charging data corresponding to the previous charging and discharging times of the current charging and discharging times.

[0065] Step S30, when the SOC of the second battery is obtained, calculating a deviation value between the SOC of the first battery and the SOC of the second battery;

[0066] The deviation value between the first battery SOC and the second battery SOC refers to the difference between the two battery SOCs.

[0067] Step S40, when the deviation value is greater than a set threshold, controlling the battery of the pure electric tractor to be charged according to a first charging strategy, wherein the first charging strategy is a strategy for adjusting the SOC of the first battery based on the deviation value;

[0068] The threshold value may be set based on actual needs, and is an allowable value of SOC error to reflect SOC accuracy, which may generally be 5%.

[0069] The first charging strategy is to control the battery of the pure electric tractor to charge based on the first battery SOC, and after being fully charged, adjust the first battery SOC based on the deviation value to reduce the error caused by the accumulation of the accuracy of the SOC calculation by the BMS during the use of the battery. At this time, the cut-off voltage is the voltage that the battery cell allows to be fully charged.

[0070] Furthermore, in S40, when the deviation value is greater than a set threshold, the battery of the pure electric tractor is controlled to be charged according to a first charging strategy, including:

[0071] When the deviation value is greater than a set threshold, the battery of the pure electric tractor is controlled to be charged based on the first battery SOC, and after charging, the first battery SOC is adjusted based on the deviation value.

[0072] Step S50, when the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, the battery of the pure electric tractor is controlled to be charged according to a second charging strategy, wherein the second charging strategy is a strategy for adjusting a cutoff voltage corresponding to the first battery SOC based on the number of charge and discharge times.

[0073] Among them, the second charging strategy is:

[0074] If the current number of charge and discharge times is greater than the set number of times, the battery of the pure electric tractor is controlled to be charged based on the first battery SOC, and after charging, the first battery SOC is adjusted based on the deviation value. This part is consistent with the first charging strategy, and the first charging strategy can be recorded as MAP1;

[0075] If the current charge and discharge times are not greater than the set times, the cut-off voltage corresponding to the first battery SOC is adjusted to the set voltage, so as to control the battery of the pure electric tractor to charge based on the adjusted cut-off voltage. The corresponding strategy of this part can be called MAP2. Both MAP1 and MAP2 strategies are set in the battery BMS for ready call.

[0076] Furthermore, in the above S50, when the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, the battery of the pure electric tractor is controlled to be charged according to the second charging strategy, including:

[0077] When the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, determining whether the current charge and discharge times are greater than a set times;

[0078] If the current charge and discharge times are greater than the set times, the battery of the pure electric tractor is controlled to be charged based on the first battery SOC, and after charging, the first battery SOC is adjusted based on the deviation value;

[0079] If the current number of charge and discharge cycles is not greater than the set number of cycles, the cut-off voltage corresponding to the first battery SOC is adjusted to the set voltage, so as to control the battery of the pure electric tractor to be charged based on the adjusted cut-off voltage.

[0080] Among them, the set voltage can be the cut-off voltage that allows the battery cell to be charged at 1 / 3C. At this time, the SOC is about 97%, the power is reduced by 3%, and the charging time is reduced by about 20%. Based on the second charging strategy, it can be used for charging in continuous operation conditions of the whole machine.

[0081] The set number of times may be recorded as N, and may be determined in advance based on historical charge and discharge data.

[0082] Optionally, when the pure electric tractor has no vehicle demand within the remaining full charging time corresponding to the current number of charge and discharge times, the method further includes:

[0083] The battery of the pure electric tractor is controlled to be charged according to a first charging strategy.

[0084] In order to better illustrate and understand the principle of the method provided by the present invention, the scheme of the present invention is described below in conjunction with an optional specific embodiment. It should be noted that the specific implementation of each step in the specific embodiment should not be understood as a limitation to the scheme of the present invention. On the basis of the principle of the scheme provided by the present invention, other implementations that can be thought of by those skilled in the art should also be considered within the scope of protection of the present invention.

[0085] In this embodiment, see Figure 2 As shown in the flowchart, the scheme includes the following steps:

[0086] Step 1, start charging at the current charge and discharge times;

[0087] Step 2: Based on the customer's usage habits, calculate whether there is a need to use the vehicle within the remaining charging time (remaining full charging time);

[0088] Step 3, if there is a demand for a vehicle, calculate the error deviation (deviation value) between the SOC (second battery SOC) obtained by looking up the OCV table when the vehicle is static and the calculated SOC (first battery SOC); and determine whether the deviation value is greater than a set threshold value (M%);

[0089] Step 4: If there is no vehicle demand, the battery of the pure electric tractor is controlled to be charged based on the first control strategy (MAP1);

[0090] Step 5: If the deviation value is not greater than the set threshold, the battery of the pure electric tractor is controlled to be charged based on the first control strategy (MAP1);

[0091] Step 6: If the deviation value is greater than the set threshold, determine whether the current charge and discharge times (accumulated charge and discharge times) is greater than the set times (N);

[0092] Step 7: If the current number of charge and discharge cycles is greater than the set number of times, the battery of the pure electric tractor is controlled to be charged based on the first control strategy (MAP1);

[0093] Step 8: If the current charge and discharge times are not greater than the set times, charging is performed based on MAP2.

[0094] The solution of the present invention has the following technical effects:

[0095] The present invention can shorten the charging time of the whole machine under the premise of ensuring the SOC accuracy. In the continuous operation condition of the whole machine, the charging time of each charge can be shortened by at least 20%, thereby increasing the discharge operation time and the profit.

[0096] Based on Figure 1 Based on the same principle as the method shown in , the embodiment of the present invention also provides a pure electric tractor charging control device 20, such as Figure 3 As shown in , the pure electric tractor charging control device 20 may include a first battery SOC acquisition module 210, a second battery SOC acquisition module 220, a deviation value calculation module 230, a first charging module 240 and a second charging module 250, wherein:

[0097] The first battery SOC acquisition module 210 is used to calculate the first battery SOC of the pure electric tractor corresponding to the current charge and discharge times when there is a demand for the vehicle within the remaining full charge time corresponding to the current charge and discharge times;

[0098] A second battery SOC acquisition module 220, configured to acquire a preset second battery SOC, where the second battery SOC is a battery SOC corresponding to a preset open circuit voltage range;

[0099] a deviation value calculation module 230, configured to calculate a deviation value between the first battery SOC and the second battery SOC when the second battery SOC is acquired;

[0100] A first charging module 240, configured to control the battery of the pure electric tractor to be charged according to a first charging strategy when the deviation value is greater than a set threshold, wherein the first charging strategy is a strategy for adjusting the SOC of the first battery based on the deviation value;

[0101] The second charging module 250 is used to control the battery of the pure electric tractor to be charged according to a second charging strategy when the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained. The second charging strategy is a strategy for adjusting the cutoff voltage corresponding to the first battery SOC based on the number of charge and discharge times.

[0102] Optionally, when acquiring a preset second battery SOC, the second battery SOC acquisition module 220 is specifically used to:

[0103] The second battery SOC corresponding to the preset open circuit voltage range is searched through a pre-established OCV table, wherein the OCV table includes battery SOCs corresponding to different open circuit voltages.

[0104] Optionally, when the deviation value is greater than a set threshold, the first charging module 240, when controlling the battery of the pure electric tractor to charge according to the first charging strategy, is specifically used to:

[0105] When the deviation value is greater than a set threshold, the battery of the pure electric tractor is controlled to be charged based on the first battery SOC, and after charging, the first battery SOC is adjusted based on the deviation value.

[0106] Optionally, when the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, the second charging module 250 controls the battery of the pure electric tractor to charge according to the second charging strategy, specifically for:

[0107] When the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, determining whether the current charge and discharge times are greater than a set times;

[0108] If the current charge and discharge times are greater than the set times, the battery of the pure electric tractor is controlled to be charged based on the first battery SOC, and after charging, the first battery SOC is adjusted based on the deviation value;

[0109] If the current number of charge and discharge cycles is not greater than the set number of cycles, the cut-off voltage corresponding to the first battery SOC is adjusted to the set voltage, so as to control the battery of the pure electric tractor to be charged based on the adjusted cut-off voltage.

[0110] Optionally, when the pure electric tractor has no vehicle demand within the remaining full charging time corresponding to the current number of charge and discharge times, the device further includes:

[0111] The third charging module is used to control the battery of the pure electric tractor to be charged according to the first charging strategy.

[0112] The pure electric tractor charging control device of the embodiment of the present invention can execute the pure electric tractor charging control method provided by the embodiment of the present invention, and the implementation principle is similar. The actions performed by each module and unit in the pure electric tractor charging control device in each embodiment of the present invention correspond to the steps in the pure electric tractor charging control method in each embodiment of the present invention. For the detailed functional description of each module of the pure electric tractor charging control device, please refer to the description in the corresponding pure electric tractor charging control method shown in the previous text, which will not be repeated here.

[0113] Among them, the above-mentioned pure electric tractor charging control device can be a computer program (including program code) running in a computer device, for example, the pure electric tractor charging control device is an application software; the device can be used to execute the corresponding steps in the method provided in the embodiment of the present invention.

[0114] In some embodiments, the pure electric tractor charging control device provided by the embodiment of the present invention can be implemented in a combination of software and hardware. As an example, the pure electric tractor charging control device provided by the embodiment of the present invention can be a processor in the form of a hardware decoding processor, which is programmed to execute the pure electric tractor charging control method provided by the embodiment of the present invention. For example, the processor in the form of a hardware decoding processor can adopt one or more application specific integrated circuits (ASIC, Application Specific Integrated Circuit), DSP, programmable logic device (PLD, Programmable Logic Device), complex programmable logic device (CPLD, Complex Programmable Logic Device), field programmable gate array (FPGA, Field-Programmable Gate Array) or other electronic components.

[0115] In other embodiments, the pure electric tractor charging control device provided by the embodiment of the present invention can be implemented in a software manner. Figure 3 The pure electric tractor charging control device stored in the memory is shown, which can be software in the form of programs and plug-ins, and includes a series of modules, including a first battery SOC acquisition module 210, a second battery SOC acquisition module 220, a deviation value calculation module 230, a first charging module 240 and a second charging module 250, for implementing Figure 1 A charging control method for a pure electric tractor is provided.

[0116] The modules involved in the embodiments of the present invention may be implemented by software or hardware, wherein the name of a module does not limit the module itself in some cases.

[0117] Based on the same principle as the method shown in the embodiments of the present invention, an electronic device is also provided in the embodiments of the present invention, which may include but is not limited to: a processor and a memory; the memory is used to store a computer program; the processor is used to execute the method shown in any embodiment of the present invention by calling the computer program.

[0118] In an alternative embodiment, an electronic device is provided, such as Figure 4 As shown, Figure 4The electronic device 4000 shown includes: a processor 4001 and a memory 4003. The processor 4001 and the memory 4003 are connected, such as through a bus 4002. Optionally, the electronic device 4000 may also include a transceiver 4004, which may be used for data interaction between the electronic device and other electronic devices, such as data transmission and / or data reception. It should be noted that in actual applications, the transceiver 4004 is not limited to one, and the structure of the electronic device 4000 does not constitute a limitation on the embodiments of the present invention.

[0119] Processor 4001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. Processor 4001 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0120] The bus 4002 may include a path to transmit information between the above components. The bus 4002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 4002 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0121] The memory 4003 can be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this.

[0122] The memory 4003 is used to store application code (computer program) for executing the solution of the present invention, and the execution is controlled by the processor 4001. The processor 4001 is used to execute the application code stored in the memory 4003 to implement the content shown in the above method embodiment.

[0123] The electronic device may also be a terminal device. Figure 4 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0124] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer-readable storage medium is run on a computer, the computer can execute the corresponding contents of the aforementioned method embodiment.

[0125] According to another aspect of the present invention, a computer program product or a computer program is also provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the methods provided in the implementation modes of the above-mentioned various embodiments.

[0126] Computer program code for performing the operations of the present invention may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0127] It should be understood that the flow charts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the method and computer program product according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the module, the program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a sequence different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0128] The computer-readable storage medium provided by the embodiment of the present invention may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0129] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device executes the method shown in the above embodiment.

[0130] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the disclosure scope involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) by each other.

Claims

1. A pure electric tractor charging control method, characterized in that: The following steps are involved: When the pure electric tractor has a vehicle demand within the remaining full charge time corresponding to the current charge and discharge times, calculating a first battery SOC of the pure electric tractor corresponding to the current charge and discharge times; Obtaining a preset second battery SOC, where the second battery SOC is a battery SOC corresponding to a preset open circuit voltage range; When the second battery SOC is obtained, calculating a deviation value between the first battery SOC and the second battery SOC; When the deviation value is greater than a set threshold, the battery of the pure electric tractor is controlled to be charged according to a first charging strategy, wherein the first charging strategy is a strategy for adjusting the SOC of the first battery based on the deviation value; When the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, the battery of the pure electric tractor is controlled to be charged according to a second charging strategy, wherein the second charging strategy is a strategy for adjusting a cutoff voltage corresponding to the first battery SOC based on the number of charge and discharge times.

2. The method according to claim 1, characterized in that The obtaining of a preset second battery SOC includes: The second battery SOC corresponding to the preset open circuit voltage range is searched through a pre-established OCV table, wherein the OCV table includes battery SOCs corresponding to different open circuit voltages.

3. The method according to claim 1, characterized in that When the deviation value is greater than a set threshold, the battery of the pure electric tractor is controlled to be charged according to a first charging strategy, including: When the deviation value is greater than a set threshold, the battery of the pure electric tractor is controlled to be charged based on the first battery SOC, and after charging, the first battery SOC is adjusted based on the deviation value.

4. The method according to claim 1, characterized in that: When the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, the battery of the pure electric tractor is controlled to be charged according to a second charging strategy, including: When the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained, determining whether the current charge and discharge times are greater than a set times; If the current charge and discharge times are greater than the set times, the battery of the pure electric tractor is controlled to be charged based on the first battery SOC, and after charging, the first battery SOC is adjusted based on the deviation value; If the current number of charge and discharge cycles is not greater than the set number of cycles, the cut-off voltage corresponding to the first battery SOC is adjusted to the set voltage, so as to control the battery of the pure electric tractor to be charged based on the adjusted cut-off voltage.

5. The method according to claim 1, characterized in that When the pure electric tractor has no vehicle demand within the remaining full charge time corresponding to the current number of charge and discharge times, the method further includes: The battery of the pure electric tractor is controlled to be charged according to a first charging strategy.

6. A pure electric tractor charging control device, characterized in that: include: A first battery SOC acquisition module is used to calculate the first battery SOC of the pure electric tractor corresponding to the current charge and discharge times when there is a demand for the vehicle within the remaining full charge time corresponding to the current charge and discharge times; A second battery SOC acquisition module, used to acquire a preset second battery SOC, where the second battery SOC is a battery SOC corresponding to a preset open circuit voltage range; a deviation value calculation module, configured to calculate a deviation value between the first battery SOC and the second battery SOC when the second battery SOC is acquired; a first charging module, configured to control the battery of the pure electric tractor to be charged according to a first charging strategy when the deviation value is greater than a set threshold, wherein the first charging strategy is a strategy for adjusting the SOC of the first battery based on the deviation value; The second charging module is used to control the battery of the pure electric tractor to be charged according to a second charging strategy when the deviation value is not greater than the set threshold or the second battery SOC cannot be obtained. The second charging strategy is a strategy for adjusting the cut-off voltage corresponding to the first battery SOC based on the number of charge and discharge times.

7. The device according to claim 6, characterized in that When acquiring the preset second battery SOC, the second battery SOC acquisition module is specifically used to: The second battery SOC corresponding to the preset open circuit voltage range is searched through a pre-established OCV table, wherein the OCV table includes battery SOCs corresponding to different open circuit voltages.

8. An electronic device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 5 when executing the computer program.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

10. A pure electric tractor, characterized in that: Comprising the electronic device as claimed in claim 8.

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