Charging management method, device and system, engineering machinery and storage medium

Abstract

The invention provides a charging management method, device and system, engineering machinery and a storage medium. The charging management method comprises the steps that the current first residual electric quantity of energy storage equipment on each branch in N branches connected in parallel is acquired, and the charging loads of all the branches are sequentially increased in the direction from the first branch to the Nth branch; according to the first residual electric quantity of the energy storage equipment on the (i + 1) th branch, the first residual electric quantity of the energy storage equipment on the ith branch and the preset charging current of the ith branch, the duration of the ith starting time period, # imgabs0 #, is determined; according to the sequence from the first starting time period to the (N-1) th starting time period, in the ith starting time period, the ith charging current is used for charging the energy storage devices on the first branch circuit to the ith branch circuit; and after N-1 initial time periods, charging the energy storage devices on the N branches according to a predetermined charging strategy.

Description

Technical Field

[0001] The present disclosure relates to the field of control technology, and in particular to a charging management method, device and system, engineering machinery and storage medium. Background Art

[0002] With the promotion of green and intelligent strategies, the electrification transformation of large-tonnage construction machinery has gradually been put on the agenda. Such equipment often has the following characteristics: 1) large power demand; 2) harsh operating conditions; 3) long working cycle; 4) concentrated working hours, etc.

[0003] For such large equipment, due to the high power demand, the battery system is usually composed of multiple branches. There is a certain power difference between the parallel branches, which will cause current circulation. In actual use, the environment of each branch in the system is different. This difference is gradually magnified as the number of battery charge and discharge increases, and the circulation phenomenon will be further aggravated. For this problem, the circulation phenomenon can be solved by isolating the circuit. Summary of the invention

[0004] The inventors noticed that in the prior art, the circulation phenomenon is solved by isolating the circuit, but the imbalance of electricity between branches cannot be solved. The electricity can also be balanced by active discharge or energy replenishment between branches, but it will increase the load at the discharge end and the energy consumption of the system.

[0005] Accordingly, the present disclosure provides a charging management method that can effectively balance the power of each branch without conflicting with the existing balancing strategy.

[0006] In a first aspect of the present disclosure, a charging management method is provided, comprising: obtaining a current first remaining power of an energy storage device on each of N parallel branches, wherein the charging load of each branch increases in sequence from the 1st branch to the Nth branch; determining the duration of an i-th starting time period according to the first remaining power of the energy storage device on the i+1th branch, the first remaining power of the energy storage device on the i-th branch, and a predetermined charging current of the i-th branch, ; In order from the 1st starting time period to the N-1th starting time period, within the ith starting time period, use the ith charging current to charge the energy storage devices on the 1st branch to the ith branch, wherein the ith charging current is determined according to the parameter i and the predetermined charging current of the ith branch; after the N-1 starting time periods, charge the energy storage devices on the N branches according to the predetermined charging strategy.

[0007] In some embodiments, determining the duration of the i-th starting time period includes: judging whether the difference between the first remaining power of the energy storage device on the i+1-th branch and the first remaining power of the energy storage device on the i-th branch is greater than a predetermined deviation threshold; if the difference is greater than the predetermined deviation threshold, obtaining the duration of the i-th starting time period according to the difference and the predetermined charging current of the i-th branch.

[0008] In some embodiments, the duration of the i-th starting time period is positively correlated with the difference, and is negatively correlated with the predetermined charging current of the i-th branch.

[0009] In some embodiments, obtaining the duration of the i-th starting time period includes: calculating the ratio of the difference and the predetermined charging current of the i-th branch to obtain the duration of the i-th starting time period.

[0010] In some embodiments, the i-th charging current is determined according to a product of a parameter i and a predetermined charging current of the i-th branch.

[0011] In some embodiments, if the difference is not greater than the predetermined deviation threshold, the duration of the i-th starting time period is determined to be 0.

[0012] In some embodiments, when the remaining power of the energy storage device on the Nth branch is greater than a predetermined power threshold, the current second remaining power of the energy storage device on each branch is obtained; the duration of the first end time period is determined according to the second remaining power of the energy storage device on the Nth branch, the second remaining power of the energy storage device on the N-1th branch, and the predetermined charging current of the N-1th branch; the duration of the jth end time period is determined according to the second remaining power of the energy storage device on the N-j+1th branch, the second remaining power of the energy storage device on the N-j+2th branch, the second remaining power of the energy storage device on the Njth branch, and the predetermined charging current of the Njth branch. ; During the first end time period, the energy storage devices on the 1st branch to the N-1th branch are charged with the first charging current, wherein the first charging current is determined according to the parameter N-1 and the predetermined charging current of the N-1th branch; in the jth end time period, the energy storage devices on the 1st branch to the Njth branch are charged with the jth charging current, wherein the jth charging current is determined according to the parameter Nj and the predetermined charging current of the Njth branch; after the N-1 end time periods, the energy storage devices on the N branches are stopped from being charged.

[0013] In some embodiments, the duration of the jth end time period is positively correlated with the second remaining power of the energy storage device on the N-j+1th branch, and negatively correlated with the second remaining power of the energy storage device on the N-j+2th branch, the energy storage device on the Njth branch, and the predetermined charging current of the i-th branch.

[0014] In some embodiments, determining the duration of the jth end time period includes: calculating the sum of the second remaining power of the energy storage device on the N-j+2th branch and the second remaining power of the energy storage device on the Njth branch to obtain a first intermediate value; obtaining a second intermediate value based on the difference between twice the second remaining power of the energy storage device on the N-j+1th branch and the first intermediate value; and obtaining the duration of the jth end time period based on the second intermediate value and the ratio of the predetermined charging current of the Njth branch.

[0015] In some embodiments, the j-th charging current is determined according to a product of a parameter Nj and a predetermined charging current of the Nj-th branch.

[0016] In some embodiments, the duration of the first end time period is positively correlated with the second remaining power of the energy storage device on the Nth branch, and negatively correlated with the second remaining power of the energy storage device on the N-1th branch, and the predetermined charging current of the N-1th branch.

[0017] In some embodiments, the determining the duration of the first end time period includes: obtaining a third intermediate value according to the difference between the second remaining power of the energy storage device on the Nth branch and the second remaining power of the energy storage device on the N-1th branch; determining the duration of the first end time period according to the third intermediate value and the predetermined charging current of the N-1th branch;

[0018] In some embodiments, the first charging current is determined according to a product of parameter N-1 and a predetermined charging current of the N-1th branch.

[0019] In some embodiments, the predetermined charging current is a preset current whose current value is less than a current threshold.

[0020] In a second aspect of the present disclosure, a charging management device is provided, comprising: a memory; and a processor, coupled to the memory, the processor being configured to execute a charging management method as described in any of the above embodiments based on instructions stored in the memory.

[0021] In a third aspect of the present disclosure, a charging management system is provided, comprising: a charging management device as described in any of the above embodiments; N branches connected in parallel, wherein each of the N branches is provided with an energy storage device and a switch, and in the direction from the 1st branch to the Nth branch, the charging load of each branch increases successively, and the switch is controlled by the charging management device; a detection device, used to detect the remaining power of the energy storage device and send the detection result to the charging management device.

[0022] In a fourth aspect of the present disclosure, there is provided a construction machine, comprising a charging management system as described in any of the above embodiments.

[0023] In a fifth aspect of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the method described in any of the above embodiments is implemented.

[0024] In a sixth aspect of the present disclosure, a computer program product is provided, comprising computer instructions, wherein when the computer instructions are executed by a processor, the method described in any of the above embodiments is implemented.

[0025] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A schematic diagram of a charging management method according to an embodiment of the present disclosure;

[0028] Figure 2 A schematic diagram of the charging current changing with time according to an embodiment of the present disclosure;

[0029] Figure 3 is a schematic diagram of the charging current changing with time according to another embodiment of the present disclosure;

[0030] Figure 4 It is a flowchart of a charging management method according to another embodiment of the present disclosure;

[0031] Figure 5 is a schematic diagram of the charging current changing with time according to another embodiment of the present disclosure;

[0032] Figure 6 This is a schematic diagram of the structure of a charging management device according to an embodiment of the present disclosure;

[0033] Figure 7 This is a schematic diagram of the structure of a charging management system according to an embodiment of the present disclosure;

[0034] Figure 8 The figure is a schematic diagram of the structure of an engineering machinery according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0036] Unless specifically stated otherwise, the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0037] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0038] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0039] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0040] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0041] Figure 1 The following is a flow chart of a charging management method according to an embodiment of the present disclosure. In some embodiments, the following charging management method is executed by a charging management device, including steps 11-14.

[0042] In step 11, the current first remaining power of the energy storage device on each branch of the N parallel branches is obtained.

[0043] For example, energy storage devices include power battery packs.

[0044] It should be noted here that in the direction from the 1st branch to the Nth branch, the charging load of each branch increases successively.

[0045] In step 12, the duration of the i-th starting time period is determined according to the first remaining power of the energy storage device on the i+1-th branch, the first remaining power of the energy storage device on the i-th branch, and the predetermined charging current of the i-th branch. .

[0046] It should be noted here that the predetermined charging current of the i-th branch is the charging current allowed by the i-th branch under a predetermined charging strategy.

[0047] In some embodiments, the step of determining the duration of the i-th starting time period includes the following contents.

[0048] 1) Determine whether a difference between a first remaining power of the energy storage device on the (i+1)th branch and a first remaining power of the energy storage device on the (i)th branch is greater than a predetermined deviation threshold.

[0049] 2) If the difference is greater than a predetermined deviation threshold, the duration of the i-th starting time period is obtained according to the difference and the predetermined charging current of the i-th branch.

[0050] In some embodiments, the duration of the i-th starting time period is positively correlated with the difference value, and is negatively correlated with the predetermined charging current of the i-th branch.

[0051] For example, the ratio of the difference value to the predetermined charging current of the i-th branch is calculated to obtain the duration of the i-th starting time period.

[0052] For example, suppose the first remaining capacity of the energy storage device on the i+1th branch is , the first remaining capacity of the energy storage device on the i-th branch is , the predetermined charging current of the i-th branch is , then the duration of the i-th starting time period As shown in formula (1).

[0053] (1)

[0054] In some embodiments, if the difference is not greater than a predetermined deviation threshold, the duration of the i-th starting time period is determined to be 0.

[0055] It should be noted here that if the difference is not greater than the predetermined deviation threshold, it indicates that the deviation between the two is very small, or even close to 0. In this case, it is not meaningful to recharge the battery pack with a very small difference in power. Therefore, this time period is skipped directly and the next time period is directly entered for charging management.

[0056] In step 13, in the order from the 1st starting time period to the N-1th starting time period, in the i-th starting time period, the energy storage devices on the 1st branch to the i-th branch are charged using the i-th charging current, wherein the i-th charging current is determined according to the parameter i and the predetermined charging current of the i-th branch.

[0057] In some embodiments, the i-th charging current It is determined by the product of parameter i and the predetermined charging current of the i-th branch.

[0058] In step 14, after N-1 starting time periods, the energy storage devices on the N branches are charged according to a predetermined charging strategy.

[0059] The above embodiments of the present disclosure are described below through specific examples. Embodiment 1

[0060] There are five branches connected in parallel. In the direction from the first branch to the fifth branch, the charging load of each branch increases successively. Suppose the current first remaining power of the energy storage device on the first branch is , the current first remaining power of the energy storage device on the second branch is , the current first remaining power of the energy storage device on the third branch is , the current first remaining power of the energy storage device on the 4th branch is , the current first remaining power of the energy storage device on the 5th branch is .

[0061] The duration of the first starting time period As shown in formula (2).

[0062] (2)

[0063] In formula (2), is the predetermined charging current of the first branch.

[0064] The duration of the second starting time period As shown in formula (3).

[0065] (3)

[0066] In formula (3), is the predetermined charging current of the second branch.

[0067] Duration of the third starting time period As shown in formula (3).

[0068] (4)

[0069] In formula (4), is the predetermined charging current of the third branch.

[0070] Duration of the fourth starting time period As shown in formula (5).

[0071] (5)

[0072] In formula (5), is the predetermined charging current of the 4th branch.

[0073] Based on the above analysis, if Figure 2 As shown, the charging strategy for these five branches includes the following contents.

[0074] 1) Closing the first branch, duration of the first starting time period Internally, current Charge the energy storage device on the first branch.

[0075] 2) Closing the second branch, duration in the second starting time period Internally, current Charge the energy storage devices on the first and second branches.

[0076] 3) Closing the third branch, duration in the third starting time period Internally, current Charge the energy storage devices on the 1st branch, the 2nd branch and the 3rd branch.

[0077] 4) Closing the fourth branch, duration in the fourth starting time period Internally, current Charge the energy storage devices on the 1st branch, the 2nd branch, the 3rd branch and the 4th branch.

[0078] 5) Close the 5th branch and use the current according to the preset charging strategy. Charge the energy storage devices on branches 1 to 5. Embodiment 2

[0079] The difference between the second embodiment and the first embodiment is that in the second embodiment, and The difference is less than the predetermined threshold. In this case, the duration of the fourth start time period is is 0.

[0080] Based on the above analysis, if Figure 3 As shown, the charging strategy for these five branches includes the following contents.

[0081] 1) Closing the first branch, duration of the first starting time period Internally, current Charge the energy storage device on the first branch.

[0082] 2) Closing the second branch, duration in the second starting time period Internally, current Charge the energy storage devices on the first and second branches.

[0083] 3) Closing the third branch, duration in the third starting time period Internally, current Charge the energy storage devices on the 1st branch, the 2nd branch and the 3rd branch.

[0084] 4) Close the 4th and 5th branches and use the current according to the preset charging strategy. Charge the energy storage devices on branches 1 to 5.

[0085] The patent needs to explain that due to the length of the fourth starting time period is 0, so the fourth start time period is skipped directly.

[0086] It should be noted here that the predetermined charging currents of the above-mentioned branches may be the same or different.

[0087] In the charging management method provided in the above embodiment of the present disclosure, the energy storage devices on multiple branches are charged by adopting a cascade charging method, and the branches with lower charging loads are charged first, so that the power of each branch can be effectively balanced without conflicting with the existing balancing strategy.

[0088] Figure 4 The following is a flow chart of a charging management method according to an embodiment of the present disclosure. In some embodiments, the following charging management method is executed by a charging management device, including steps 41-46.

[0089] In step 41, when the remaining power of the energy storage device on the Nth branch is greater than a predetermined power threshold, the current second remaining power of the energy storage device on each branch is obtained.

[0090] In step 42, the duration of the first end time period is determined according to the second remaining power of the energy storage device on the Nth branch, the second remaining power of the energy storage device on the N-1th branch, and the predetermined charging current of the N-1th branch.

[0091] In some embodiments, the duration of the first end time period is positively correlated with the second remaining power of the energy storage device on the Nth branch, and negatively correlated with the second remaining power of the energy storage device on the N-1th branch, and the predetermined charging current of the N-1th branch.

[0092] In some embodiments, according to the second remaining power of the energy storage device on the Nth branch , and the second remaining capacity of the energy storage device on the N-1th branch Next, according to the third intermediate value and the predetermined charging current of the N-1th branch, , determine the duration of the first end time period .

[0093] For example, the duration of the first end time period As shown in formula (6).

[0094] (6)

[0095] In step 43, the duration of the jth end time period is determined according to the second remaining power of the energy storage device on the N-j+1th branch, the second remaining power of the energy storage device on the N-j+2th branch, the second remaining power of the energy storage device on the Njth branch, and the predetermined charging current of the Njth branch. .

[0096] In some embodiments, the duration of the jth end time period is positively correlated with the second remaining power of the energy storage device on the N-j+1th branch, and negatively correlated with the second remaining power of the energy storage device on the N-j+2th branch, the energy storage device on the Njth branch, and the predetermined charging current of the i-th branch.

[0097] In some embodiments, the second remaining power of the energy storage device on the N-j+2th branch is calculated , and the second remaining capacity of the energy storage device on the Njth branch According to the second remaining power of the energy storage device on the N-j+1th branch The second intermediate value is obtained by dividing the second intermediate value by the ratio of the predetermined charging current of the Njth branch by twice the first intermediate value. Length of time.

[0098] For example, the jth end time period The duration is shown in formula (7).

[0099] (7)

[0100] In step 44, during the first end time period, the energy storage devices on the first branch to the N-1th branch are charged with the first charging current, wherein the first charging current is determined according to the parameter N-1 and the predetermined charging current of the N-1th branch.

[0101] In some embodiments, the first charging current is determined according to the product of parameter N-1 and a predetermined charging current of the N-1th branch.

[0102] In step 45, in the order from the 2nd end time period to the N-1th end time period, in the jth end time period, the energy storage devices on the 1st branch to the Njth branch are charged using the jth charging current, wherein the jth charging current is determined according to the parameter Nj and the predetermined charging current of the Njth branch.

[0103] In some embodiments, the jth charging current is determined according to the product of the parameter Nj and the predetermined charging current of the Njth branch.

[0104] In step 46 , after N-1 end time periods, charging of the energy storage devices on the N branches is stopped.

[0105] The following is a specific example to illustrate the processing method at the end of charging. Embodiment 3

[0106] There are five branches connected in parallel. In the direction from the first branch to the fifth branch, the charging load of each branch increases in sequence. When the five branches are charged according to the first or second embodiment, if the remaining power of the energy storage device on the fifth branch is greater than a predetermined power threshold, the second current remaining power of the energy storage device on each branch is obtained.

[0107] For example, the current second remaining capacity of the energy storage device on branch 1 is , the current second remaining capacity of the energy storage device on the second branch is , the current second remaining capacity of the energy storage device on the third branch is , the current second remaining capacity of the energy storage device on the 4th branch is , the current second remaining capacity of the energy storage device on the 5th branch is .

[0108] The duration of the first end time period As shown in formula (8).

[0109] (8)

[0110] In formula (8), is the predetermined charging current of the 4th branch.

[0111] The duration of the second end time period As shown in formula (9).

[0112] (9)

[0113] In formula (9), is the predetermined charging current of the third branch. By substituting formula (8) into formula (9), we get formula (10).

[0114] (10)

[0115] Duration of the third end time period As shown in formula (11).

[0116] (11)

[0117] In formula (11), is the predetermined charging current of the second branch. By substituting formula (8) and formula (10) into formula (11), formula (12) is obtained.

[0118] (12)

[0119] Duration of the fourth end time period As shown in formula (13).

[0120] (13)

[0121] In formula (5), is the predetermined charging current of the first branch. By substituting formula (8), formula (10) and formula (12) into formula (13), formula (14) is obtained.

[0122] (14)

[0123] Based on the above analysis, when the five branches are charged according to the above embodiment 1 or embodiment 2, when the remaining power of the energy storage device on the fifth branch is greater than the predetermined power threshold, Figure 5 As shown, the charging strategy for these five branches includes the following contents.

[0124] 1) Disconnect the 5th branch, the duration of the first end time period Internally, current Charge the energy storage devices on branches 1 to 4.

[0125] 2) Disconnect the 4th branch, the duration of the second end time period Internally, current Charge the energy storage devices on branches 1 to 3.

[0126] 3) Disconnect the third branch, the duration of the third end time period Internally, current Charge the energy storage devices on the first and second branches.

[0127] 4) Disconnect the second branch, the duration of the fourth end time period Internally, current Charge the energy storage device on the first branch.

[0128] 5) Disconnect the first branch and stop charging the energy storage devices on these five branches. Embodiment 4

[0129] The difference between the fourth embodiment and the third embodiment is that in the fourth embodiment, the predetermined charging currents of the five branches are the same, and are all preset currents less than the current threshold. .

[0130] In this case, the duration of each end time period is as shown in formula (15) to formula (18).

[0131] (15)

[0132] (16)

[0133] (17)

[0134] (18)

[0135] Through the above processing, the power balance of each branch can be guaranteed at the end of charging.

[0136] Figure 6 The present invention is a schematic diagram of the structure of a charging management device according to an embodiment of the present invention.

[0137] like Figure 6 As shown, the charging management device 60 may be in the form of a general purpose computing device. The charging management device 60 includes a memory 61, a processor 62, and a bus 63 connecting different system components.

[0138] The memory 61 may include, for example, a system memory, a non-volatile storage medium, etc. The system memory may store, for example, an operating system, an application program, a boot loader, and other programs. The system memory may include a volatile storage medium, such as a random access memory (RAM) and / or a cache memory. The non-volatile storage medium may store, for example, instructions of a corresponding embodiment of at least one charging management method being executed. The non-volatile storage medium includes, but is not limited to, a disk memory, an optical memory, a flash memory, and the like.

[0139] The processor 62 may be implemented by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistors, and other discrete hardware components. Accordingly, each module such as an acquisition module, a calculation module, and an adjustment module may be implemented by a central processing unit (CPU) running instructions in a memory that execute corresponding steps, or may be implemented by a dedicated circuit that executes corresponding steps.

[0140] For example, the processor 62 is configured to execute instructions stored in the memory to implement the following Figure 1 or Figure 4 The method of any one of the embodiments.

[0141] The bus 23 may use any of a variety of bus structures, including, but not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MCA) bus, and a Peripheral Component Interconnect (PCI) bus.

[0142] The interfaces 64, 65, 66 of the charging management device 60 and the memory 61 and the processor 62 can be connected via a bus 63. The input / output interface 64 can provide a connection interface for input / output devices such as a display, a mouse, and a keyboard. The network interface 65 provides a connection interface for various networked devices. The storage interface 66 provides a connection interface for external storage devices such as a floppy disk, a USB flash drive, and an SD card.

[0143] Here, various aspects of the present disclosure are described with reference to flowcharts and / or block diagrams of methods, devices, and computer program products according to embodiments of the present disclosure. It should be understood that each frame of the flowchart and / or block diagram and the combination of frames can be implemented by computer-readable program instructions.

[0144] These computer-readable program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable device to produce a machine, so that the processor executes the instructions to produce means for implementing the functions specified in one or more blocks in the flowchart and / or block diagram.

[0145] These computer-readable program instructions may also be stored in a computer-readable memory, which cause the computer to work in a specific manner to produce an article of manufacture, including instructions for implementing the functions specified in one or more blocks in the flowchart and / or block diagram.

[0146] The present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects.

[0147] The present disclosure also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the following is implemented: Figure 1 or Figure 4 The method of any one of the embodiments.

[0148] The present disclosure also provides a computer program product, including computer instructions, wherein when the computer instructions are executed by a processor, the following is achieved: Figure 1 or Figure 4 The method of any one of the embodiments.

[0149] Figure 7 FIG. 1 is a schematic diagram of the structure of a charging management system according to an embodiment of the present disclosure. Figure 7 As shown, the charging management system includes a charging management device 71, N parallel branches 721, 722, ..., 72n, and a detection device 73. Energy storage devices 741, 742, ..., 74n and switches 751, 752, ..., 75n are provided in the N branches. The charging management device 71 is Figure 6 A charging management device according to any one of the embodiments.

[0150] In the N branches, each branch is provided with a corresponding energy storage device and a switch. In the direction from the 1st branch to the Nth branch, the charging load of each branch increases successively, and the switch is controlled according to the charging management device.

[0151] For example, energy storage devices include power battery packs.

[0152] The detection device 73 is used to detect the remaining power of each energy storage device and send the detection result to the charging management device 71. The charging management device 71 controls the on-off state of each branch by controlling the switch on the branch.

[0153] Figure 8 The figure is a schematic diagram of the structure of an engineering machinery according to an embodiment of the present disclosure.

[0154] like Figure 8 As shown, the engineering machine 80 includes a charging management system 81. The charging management system 81 is Figure 7 A charging management system according to any one of the embodiments.

[0155] By implementing the above-mentioned embodiments of the present disclosure, the following beneficial effects can be obtained.

[0156] 1) The charging management solution provided by the present disclosure can effectively solve the problem of power balancing in a multi-branch complex battery system;

[0157] 2) The charging management solution provided by the present disclosure in different scenarios at the early stage of charging and at the end of charging can achieve power balance at the early stage of charging and at the end of charging;

[0158] 3) The present disclosure provides a basis for unbalanced discharge of large-tonnage engineering machinery.

[0159] In some embodiments, the functional unit described above may be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any appropriate combination thereof, for performing the functions described in the present disclosure.

[0160] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0161] The description of the present disclosure is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present disclosure to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present disclosure, and to enable those of ordinary skill in the art to understand the present disclosure and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A charging management method, comprising: Obtaining a current first remaining power of an energy storage device on each of the N branches connected in parallel, wherein in a direction from the first branch to the Nth branch, the charging load of each branch increases sequentially; Determine the duration of the i-th starting time period according to the first remaining power of the energy storage device on the i+1-th branch, the first remaining power of the energy storage device on the i-th branch, and the predetermined charging current of the i-th branch, ; In order from the 1st starting time period to the N-1th starting time period, in the ith starting time period, the energy storage devices on the 1st branch to the ith branch are charged using the ith charging current, wherein the ith charging current is determined according to the parameter i and the predetermined charging current of the ith branch; After N-1 starting time periods, the energy storage devices on the N branches are charged according to a predetermined charging strategy.

2. The charging management method according to claim 1, wherein: Determining the duration of the i-th starting time period includes: Determine whether a difference between a first remaining power of the energy storage device on the (i+1)th branch and a first remaining power of the energy storage device on the (i)th branch is greater than a predetermined deviation threshold; If the difference is greater than the predetermined deviation threshold, the duration of the i-th starting time period is obtained according to the difference and the predetermined charging current of the i-th branch.

3. The charging management method according to claim 2, wherein: The duration of the i-th starting time period is positively correlated with the difference, and is negatively correlated with the predetermined charging current of the i-th branch.

4. The charging management method according to claim 3, wherein: The duration of the i-th starting time period is obtained as follows: The ratio of the difference to the predetermined charging current of the i-th branch is calculated to obtain the duration of the i-th starting time period.

5. The charging management method according to claim 2, wherein: The i-th charging current is determined according to the product of parameter i and the predetermined charging current of the i-th branch.

6. The charging management method according to claim 2, wherein: If the difference is not greater than the predetermined deviation threshold, the duration of the i-th starting time period is determined to be 0.

7. The charging management method according to any one of claims 1 to 6, wherein: When the remaining power of the energy storage device on the Nth branch is greater than a predetermined power threshold, obtaining a current second remaining power of the energy storage device on each branch; Determine the duration of the first end time period according to the second remaining power of the energy storage device on the Nth branch, the second remaining power of the energy storage device on the N-1th branch, and the predetermined charging current of the N-1th branch; Determine the duration of the jth end time period according to the second remaining power of the energy storage device on the N-j+1th branch, the second remaining power of the energy storage device on the N-j+2th branch, the second remaining power of the energy storage device on the Njth branch, and the predetermined charging current of the Njth branch, ; In the first end time period, the energy storage devices on the first branch to the N-1th branch are charged using the first charging current, wherein the first charging current is determined according to the parameter N-1 and the predetermined charging current of the N-1th branch; In the order from the 2nd end time period to the N-1th end time period, in the jth end time period, the energy storage devices on the 1st branch to the Njth branch are charged with the jth charging current, wherein the jth charging current is determined according to the parameter Nj and the predetermined charging current of the Njth branch; After N-1 end time periods, charging of the energy storage devices on the N branches is stopped.

8. The charging management method according to claim 7, wherein: The duration of the j-th end time period is positively correlated with the second remaining power of the energy storage device on the N-j+1-th branch, and negatively correlated with the second remaining power of the energy storage device on the N-j+2-th branch, the energy storage device on the Nj-th branch, and the predetermined charging current of the i-th branch.

9. The charging management method according to claim 8, wherein: Determining the duration of the j-th end time period includes: Calculating the sum of the second remaining power of the energy storage device on the N-j+2th branch and the second remaining power of the energy storage device on the Njth branch to obtain a first intermediate value; Obtaining a second intermediate value according to a difference between twice the second remaining power of the energy storage device on the N-j+1th branch and the first intermediate value; The duration of the jth end time period is obtained according to the ratio of the second intermediate value to the predetermined charging current of the Njth branch.

10. The charging management method according to claim 7, wherein: The j-th charging current is determined according to the product of parameter Nj and the predetermined charging current of the Nj-th branch.

11. The charging management method according to claim 7, wherein: The duration of the first end time period is positively correlated with the second remaining power of the energy storage device on the Nth branch, and negatively correlated with the second remaining power of the energy storage device on the N-1th branch, and the predetermined charging current of the N-1th branch.

12. The charging management method according to claim 11, wherein: Determining the duration of the first end time period includes: Obtaining a third intermediate value according to a difference between the second remaining power of the energy storage device on the Nth branch and the second remaining power of the energy storage device on the N-1th branch; The duration of the first end time period is determined according to the third intermediate value and the predetermined charging current of the N-1th branch.

13. The charging management method according to claim 7, wherein: The first charging current is determined according to the product of parameter N-1 and the predetermined charging current of the N-1th branch.

14. The charging management method according to claim 7, wherein: The predetermined charging current is a preset current whose current value is less than a current threshold.

15. A charging management device, comprising: Memory; A processor is coupled to the memory, and the processor is configured to execute the charging management method according to any one of claims 1 to 14 based on instructions stored in the memory.

16. A charging management system, comprising: The charging management device as claimed in claim 15; N branches connected in parallel, each of the N branches is provided with an energy storage device and a switch, and in the direction from the first branch to the Nth branch, the charging load of each branch increases successively, and the switch is controlled according to the charging management device; The detection device is used to detect the remaining power of the energy storage device and send the detection result to the charging management device.

17. An engineering machine, comprising the charging management system according to claim 16.

18. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the charging management method according to any one of claims 1 to 14 is implemented.

19. A computer program product, comprising computer instructions, wherein when the computer instructions are executed by a processor, the charging management method according to any one of claims 1 to 14 is implemented.

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