Energy storage system power distribution method, device, storage medium and electronic equipment

Abstract

The present application proposes a power distribution method, device, storage medium and electronic device for an energy storage system. According to the comparison result of the first total power and the current required total power, the lithium battery modules in the distribution template scheme are adjusted to form a basic power distribution scheme; based on the remaining life of each lithium battery module in the power distribution basic scheme and the current required total power, the output set power of each lithium battery module is determined to generate a current power distribution execution scheme; the management device sends the corresponding output set power to the controller in the currently working lithium battery module to execute the current power distribution execution scheme. According to the comparison result of the total power, rapid adjustments can be made to form a basic power distribution scheme that adapts to the current power distribution demand. When determining the output set power of each lithium battery module, the remaining life of the lithium battery module is referred to. On the premise of meeting the functional requirements, the safety of the equipment is also improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage, and more specifically, to a method, device, storage medium, and electronic equipment for distributing power in an energy storage system. Background Art

[0002] With the development of society, people's demand for energy has gradually increased. In order to meet the growing energy demand, many energy storage systems have been established. On the one hand, they can store excess energy, and on the other hand, they can effectively supplement electricity during peak hours of power consumption in the power grid to ensure the stable and safe operation of the power grid.

[0003] Energy storage systems are diverse in type. They can meet the storage needs of electricity from various energy sources while also broadening the channels for collecting electricity and enabling efficient utilization of natural energy resources. Current energy storage systems are primarily categorized into three main types: mechanical, electromagnetic, and electrochemical. Mechanical energy storage systems are further divided into pumped water, compressed air, and flywheel energy storage systems; electromagnetic energy storage systems are further divided into superconducting and supercapacitor energy storage systems; and electrochemical energy storage systems are further divided into lead-acid, flow, and lithium-ion battery energy storage systems. Different types of energy storage systems have varying performance and applicable scenarios, allowing for design and adjustment based on actual needs.

[0004] Currently, lithium-ion battery energy storage systems offer the broadest potential for application, and their corresponding technologies are developing most rapidly. The way in which lithium-ion battery energy storage systems distribute power also determines their service life, maintenance costs, economic benefits, and other aspects. Therefore, finding the optimal method for distributing the power of lithium-ion battery energy storage systems has become a difficult question for those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a power distribution method, device, storage medium and electronic equipment for an energy storage system to at least partially improve the above-mentioned problems.

[0006] In order to achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0007] In a first aspect, an embodiment of the present application provides a power distribution method for an energy storage system, which is applied to a management device in the energy storage system, wherein the energy storage system further includes at least two lithium battery modules, and the management device is communicatively connected to a controller in each lithium battery module. The method includes:

[0008] According to the comparison result of the first total power and the current required total power, the lithium battery modules in the allocation template solution are adjusted to form a basic power allocation solution;

[0009] The first total power is the sum of the rated powers of the lithium battery modules in the allocation template scheme, the current required total power represents the current power allocation demand, and the sum of the rated powers of the lithium battery modules in the power allocation basic scheme is greater than or equal to the current required total power;

[0010] Based on the remaining life of each lithium battery module in the power allocation basic plan and the current required total power, determining the output set power of each lithium battery module to generate a current power allocation execution plan;

[0011] The current power allocation execution plan includes a currently working lithium battery module and an output set power corresponding to the currently working lithium battery module. The currently working lithium battery module is a lithium battery module used to supply power when the current power allocation execution plan is executed. The sum of the output set powers of all currently working lithium battery modules is equal to the current required total power.

[0012] The management device sends the corresponding output setting power to the controller in the currently working lithium battery module to execute the current power allocation execution plan.

[0013] In a second aspect, an embodiment of the present application provides a power distribution device for an energy storage system, which is applied to a management device in an energy storage system, wherein the energy storage system further includes at least two lithium battery modules, and the management device is communicatively connected to a controller in each lithium battery module, and the device includes:

[0014] a processing unit, configured to adjust the lithium battery modules in the allocation template scheme according to a comparison result between the first total power and the current required total power, so as to form a basic power allocation scheme;

[0015] The first total power is the sum of the rated powers of the lithium battery modules in the allocation template scheme, the current required total power represents the current power allocation demand, and the sum of the rated powers of the lithium battery modules in the power allocation basic scheme is greater than or equal to the current required total power;

[0016] The processing unit is further configured to determine the output set power of each lithium battery module based on the remaining life of each lithium battery module in the power allocation basic plan and the current required total power, so as to generate a current power allocation execution plan;

[0017] The current power allocation execution plan includes a currently working lithium battery module and an output set power corresponding to the currently working lithium battery module. The currently working lithium battery module is a lithium battery module used to supply power when the current power allocation execution plan is executed. The sum of the output set powers of all currently working lithium battery modules is equal to the current required total power.

[0018] An information transceiver unit is used for the management device to send the corresponding output setting power to the controller in the currently working lithium battery module to execute the current power allocation execution plan.

[0019] In a third aspect, an embodiment of the present application provides a storage medium on which a computer program is stored, and the computer program implements the above method when executed by a processor.

[0020] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory, wherein the memory is used to store one or more programs; when the one or more programs are executed by the processor, the above-mentioned method is implemented.

[0021] Compared with the prior art, the embodiment of the present application provides a method, device, storage medium and electronic device for distributing power for an energy storage system. According to the comparison result of the first total power and the current required total power, the lithium battery modules in the distribution template scheme are adjusted to form a basic power distribution scheme; based on the remaining life of each lithium battery module in the basic power distribution scheme and the current required total power, the output set power of each lithium battery module is determined to generate the current power distribution execution scheme; the management device sends the corresponding output set power to the controller in the currently working lithium battery module to execute the current power distribution execution scheme. According to the comparison result of the total power, rapid adjustments can be made to form a basic power distribution scheme that adapts to the current power distribution demand. When determining the output set power of each lithium battery module, the remaining life of the lithium battery module is referred to. On the premise of meeting the functional requirements, the safety of the equipment is also improved.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a flow chart of a power distribution method for an energy storage system provided in an embodiment of the present application;

[0026] Figure 3 One of the flow charts of the energy storage system power allocation method provided in the embodiment of the present application;

[0027] Figure 4 A schematic diagram of the sub-steps of S103 provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the sub-steps of S104 provided in an embodiment of the present application;

[0029] Figure 6 One of the flow charts of the energy storage system power allocation method provided in the embodiment of the present application;

[0030] Figure 7 A schematic diagram of the sub-steps of S106 provided in an embodiment of the present application;

[0031] Figure 8 A schematic diagram of the sub-steps of S106-5 provided in an embodiment of the present application;

[0032] Figure 9 A unit diagram of a power distribution device for an energy storage system provided in an embodiment of the present application.

[0033] In the figure: 10 - processor; 11 - memory; 12 - bus; 13 - communication interface; 201 - processing unit; 202 - information transceiver unit. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0038] In the description of this application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0039] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, or electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0041] During the process of developing this application, the inventors discovered that the current power distribution of lithium battery energy storage systems mainly considers how to achieve reasonable proportional distribution, but does not address how to ensure that the lithium battery energy storage system meets the power distribution requirements while taking into account the life cycle and operating costs of the lithium battery energy storage system itself. At the same time, it can also be adaptively adjusted to changes in demand, so that power distribution is not just a simple proportional distribution control, but is organically integrated with the overall operation of the lithium battery energy storage system.

[0042] In order to overcome the above defects, the present application provides a power distribution method for a lithium battery energy storage system, which, on the basis of meeting the power distribution requirements, can take into account the life cycle of the lithium battery energy storage system and can make certain adaptive adjustments to changes in power demand.

[0043] The embodiment of the present application provides an electronic device, which can be a management device in an energy storage system, and can be but not limited to a chip with signal processing capabilities. Figure 1 , a schematic diagram of the structure of an electronic device. The electronic device includes a processor 10, a memory 11, and a bus 12. The processor 10 and the memory 11 are connected via the bus 12. The processor 10 is used to execute executable modules stored in the memory 11, such as computer programs.

[0044] The processor 10 can be an integrated circuit chip with signal processing capabilities. During the implementation process, each step of the energy storage system power distribution method can be completed by the hardware integrated logic circuit in the processor 10 or the instructions in the form of software. The above-mentioned processor 10 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be 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 transistor logic devices, discrete hardware components.

[0045] The memory 11 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory.

[0046] The bus 12 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus. Figure 1 Only one bidirectional arrow is used in the figure, but it does not mean that there is only one bus 12 or one type of bus 12.

[0047] Memory 11 is used to store programs, such as a program corresponding to an energy storage system power distribution device. The energy storage system power distribution device includes at least one software functional module that can be stored in memory 11 in the form of software or firmware, or embedded in the operating system (OS) of the electronic device. Upon receiving an execution instruction, processor 10 executes the program to implement the energy storage system power distribution method.

[0048] Possibly, the electronic device provided in the embodiment of the present application further includes a communication interface 13. The communication interface 13 is connected to the processor 10 via a bus.

[0049] In a possible implementation, the energy storage system further includes at least two lithium battery modules, and the management device is communicatively connected to a controller in each lithium battery module.

[0050] The electronic device can interact with other terminals through the communication interface 13. The other terminals can be external devices or controllers in the lithium battery module.

[0051] It should be understood that Figure 1 The structure shown is only a schematic diagram of a portion of the electronic device. The electronic device may also include Figure 1 More or fewer components than shown, or with Figure 1 Different configurations shown. Figure 1 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0052] The energy storage system power distribution method provided in the embodiment of the present application can be applied to, but not limited to, Figure 1 For detailed procedures, please refer to the electronic equipment shown in Figure 2 The energy storage system power allocation method includes: S103, S104 and S105, which are described in detail as follows.

[0053] S103 , adjusting the lithium battery modules in the allocation template scheme according to a comparison result between the first total power and the currently required total power to form a basic power allocation scheme.

[0054] Among them, the first total power is the sum of the rated powers of each lithium battery module in the allocation template scheme, the current required total power represents the current power allocation demand, and the sum of the rated powers of each lithium battery module in the power allocation basic scheme is greater than or equal to the current required total power.

[0055] It should be understood that, considering that the output power of the lithium battery module cannot be completely equal to the rated power, it can be limited to the sum of the rated powers of the individual lithium battery modules exceeding a portion of the second total power.

[0056] Confirming the current total power demand parameters is the most important part of power allocation. To develop a basic power allocation plan, the required total power must first be compared with the initial total power. During this comparison, the deviation can be calculated based on the difference in total power, allowing for rapid adjustments to be made, resulting in a basic power allocation plan that meets the current power allocation needs.

[0057] Specifically, when comparing the current required total power with the first total power, when the current required total power is greater than the first total power, the total power of the lithium battery and lithium battery module determined in the allocation template scheme cannot meet the current power allocation requirements, and the lithium battery module in the allocation template scheme needs to be adjusted to form a basic power allocation plan.

[0058] Therefore, using the difference between the current required total power and the first total power as a guide for adjustment can quickly identify suitable lithium-ion batteries and modules from those not previously included in the initial power allocation plan, thereby adjusting and forming a basic power allocation plan. This can speed up the selection of lithium-ion batteries and modules not included in the initial power allocation plan, thereby improving the efficiency of power allocation plan formulation.

[0059] It should be noted that the allocation template scheme in the embodiment of the present application can be obtained based on a historical allocation scheme, please refer to the following for details; it can also be set in advance by the staff, which is not limited here.

[0060] S104 , based on the remaining life of each lithium battery module and the current required total power in the power allocation basic plan, determine the output set power of each lithium battery module to generate a current power allocation execution plan.

[0061] Among them, the current power allocation execution plan includes the current working lithium battery module and the output set power corresponding to the current working lithium battery module. The current working lithium battery module is a lithium battery module used to supply power when the current power allocation execution plan is executed. The sum of the output set powers of all currently working lithium battery modules is equal to the current required total power.

[0062] It should be understood that in order to ensure operational safety, the output power setting of the lithium battery module is less than or equal to its rated power.

[0063] It should be noted that in the embodiment of the present application, when determining the output set power of each lithium battery module, the remaining life of the lithium battery module is referred to, which not only meets the functional requirements but also improves the safety of the equipment.

[0064] S105: The management device sends the corresponding output setting power to the controller in the currently working lithium battery module to execute the current power allocation execution plan.

[0065] In summary, the embodiment of the present application provides a method for distributing power for an energy storage system. According to the comparison result of the first total power and the current required total power, the lithium battery modules in the distribution template scheme are adjusted to form a basic power distribution scheme; based on the remaining life of each lithium battery module in the power distribution basic scheme and the current required total power, the output set power of each lithium battery module is determined to generate a current power distribution execution scheme; the management device sends the corresponding output set power to the controller in the currently working lithium battery module to execute the current power distribution execution scheme. According to the comparison result of the total power, rapid adjustments can be made to form a basic power distribution scheme that adapts to the current power distribution demand. When determining the output set power of each lithium battery module, the remaining life of the lithium battery module is referred to. On the premise of meeting the functional requirements, the safety of the equipment is also improved.

[0066] exist Figure 2 On the basis of how to obtain the allocation template solution, the embodiment of the present application also provides a possible implementation method, please refer to Figure 3 Before S103, the energy storage system power distribution method further includes: S101 and S102, which are described in detail as follows.

[0067] S101: Determine the most recent historical power allocation plan as an allocation template plan.

[0068] Among them, the historical power allocation plan includes the historical working lithium battery module and the output set power corresponding to the historical working lithium battery module. The historical working lithium battery module is a lithium battery module used to supply power when executing the historical power allocation plan. The sum of the output set powers of all historical working lithium battery modules is equal to the historical total power corresponding to the historical power allocation plan.

[0069] It should be understood that the historically working lithium battery module can be used as the lithium battery module in the allocation template solution, and the output setting power corresponding to the historically working lithium battery module in the historical power allocation solution can be used.

[0070] Since the lithium batteries and lithium battery modules of the lithium battery energy storage system have already been selected in the historical power allocation plan, when the allocation template plan mostly applies the lithium batteries and lithium battery modules in the historical power allocation plan, the parameters of the lithium batteries and lithium battery modules in the historical power allocation plan are used continuously, and the performance of the lithium batteries and lithium battery modules can be accurately grasped. There will be no large deviations in the current power allocation due to the lack of previous data reference. In addition, since most of the lithium batteries and lithium battery modules are borrowed from the historical allocation plan, a reliable initial plan can be quickly formed without excessive adjustments, which saves time in forming the allocation plan and improves the efficiency of power allocation work.

[0071] S102: If there is a newly added lithium battery module, the historical working lithium battery module in the allocation template solution is replaced by the newly added lithium battery module to complete the allocation template solution update.

[0072] Among them, the newly added lithium battery module is a lithium battery module newly added to the energy storage system after the historical power allocation plan is generated.

[0073] It should be understood that newly added lithium battery modules should be applied to power distribution in a timely manner. On the one hand, since the new lithium batteries and lithium battery modules have increased power and better performance in all aspects, they can be relatively equivalent to a larger number of lithium batteries and lithium battery modules in power distribution, thereby achieving the purpose of reducing the number of lithium batteries and lithium battery modules in the distribution plan, thereby reducing the data analysis work of lithium batteries and lithium battery modules, optimizing the plan and improving work efficiency. On the other hand, full use of updated lithium batteries and lithium battery modules can improve the parameter data of the lithium battery energy storage system in power distribution due to their good performance, and improve the operating performance of the lithium battery energy storage system.

[0074] It should be noted that the allocation template solution can also be pre-configured by the staff based on the health status of the lithium battery module (including life span and performance parameters, etc.).

[0075] exist Figure 2 On the basis of the content in S103, how to accurately obtain the basic power allocation solution, the embodiment of the present application also provides a possible implementation method, please refer to Figure 4 , S103 includes: S103-1, S103-2, S103-3 and S103-4, which are described in detail as follows.

[0076] S103-1, determine whether the first total power is less than the current required total power. If so, execute S103-4; if not, execute S103-2.

[0077] It should be understood that when the first total power is less than the current total power demand, it indicates that the individual lithium battery modules in the allocation template cannot meet the current total power demand. In this case, it is necessary to execute S103-4 to add at least one lithium battery module in a resting state to the allocation template to form a basic power allocation plan. The sum of the rated powers of the individual lithium battery modules in the adjusted basic power allocation plan is greater than or equal to the current total power demand.

[0078] If the first total power is greater than the current required total power, it is necessary to further determine whether it is excessive, and then execute S103 - 2 .

[0079] S103-2, determine whether the first total power is greater than a preset multiple of the current required total power. If so, execute S103-3; if not, end.

[0080] Optionally, the preset multiple is, for example, 1.3 or 1.5. If the difference is only slightly greater, no adjustment is required. When the first total power is greater than the preset multiple of the current required total power, an excess is present, and S103-3 is executed. Otherwise, the process ends and S104 can be executed.

[0081] S103-3, deleting at least one lithium battery module in the allocation template solution to form a basic power allocation solution.

[0082] It should be understood that, considering that not every lithium battery module has an output power equal to the rated power, the sum of the rated powers of the lithium battery modules in the basic power allocation scheme can be limited to exceed a part of the second total power. However, in order to avoid an excess, the sum of the rated powers of the lithium battery modules in the basic power allocation scheme needs to be less than or equal to a preset multiple of the current required total power.

[0083] Optionally, lithium battery modules with short remaining lifespans in the allocation template solution may be deleted, or lithium battery modules with long remaining lifespans may be deleted.

[0084] S103-4, adding at least one lithium battery module in a resting state to the allocation template plan to form a basic power allocation plan.

[0085] It should be understood that the sum of the rated powers of the various lithium battery modules in the power allocation basic scheme formed after adjustment is greater than or equal to the current required total power.

[0086] exist Figure 2 Based on the content in S104, how to accurately obtain the current power allocation execution plan, the embodiment of the present application also provides a possible implementation method, please refer to Figure 5 , S104 includes: S104-1, S104-2, S104-3 and S104-4, which are described in detail as follows.

[0087] S104-1, obtaining the remaining life of each lithium battery module in the basic power allocation solution.

[0088] Optionally, the controller of the lithium battery module may collect operating parameters of the lithium battery module to determine its remaining life, and then transmit the obtained remaining life to the management device.

[0089] It should be understood that the basic power allocation plan essentially determines the number of lithium-ion batteries and modules required in the lithium-ion battery energy storage system to meet current power allocation requirements. Optimization of the basic power allocation plan is necessary to determine the specific organization of lithium-ion batteries and modules to achieve efficient power allocation. The optimization should consider the remaining life and rated power of the lithium-ion batteries. The remaining life determines the service life of lithium-ion batteries and modules, as well as the changes in the parameters of these batteries and modules as their remaining life changes. This determines the power allocation strategy for lithium-ion batteries and modules to achieve efficient energy utilization. The rated power represents the maximum power allocation limit for each lithium-ion battery and module. Exceeding this limit may accelerate the deterioration of the lithium-ion batteries and modules, reducing the overall energy utilization of the lithium-ion battery energy storage system. This also increases the cost of replacing and maintaining lithium-ion batteries and modules, hindering the cost-effective operation of the lithium-ion battery energy storage system.

[0090] S104-2, determining a lithium battery module with a remaining life greater than or equal to a preset life threshold as a first-category lithium battery module.

[0091] Among them, the output set power of the first type of lithium battery module is the rated power.

[0092] Optionally, there is a certain lifespan threshold for the life cycle. When the lifespan threshold is exceeded, the performance of lithium batteries and lithium battery modules will be severely reduced, thereby affecting the efficiency of power distribution. Therefore, in order to ensure that power distribution can be carried out reasonably while efficiently utilizing energy and saving operating and maintenance costs, it is possible to divide the power distribution according to the lifespan threshold. Lithium batteries and lithium battery modules with a remaining lifespan greater than the lifespan threshold will be the focus of power distribution and will be allocated at full power, while lithium batteries and lithium battery modules with a remaining lifespan less than the threshold will be used as supplementary power.

[0093] By making actual and reasonable power allocation between the lithium batteries and lithium battery modules of the first type of lithium battery modules (full load power distribution group) and the lithium batteries and lithium battery modules of the first type of lithium battery modules (non-full load power distribution group), the full utilization of lithium batteries and lithium battery modules can be effectively achieved, while improving the energy utilization rate of the lithium battery energy storage system, and avoiding the excessive use of lithium batteries and lithium battery modules below the life threshold, which leads to increased costs of the lithium battery energy storage system and reduced energy utilization.

[0094] S104-3, determining a lithium battery module whose remaining life is less than a preset life threshold as a second type of lithium battery module.

[0095] S104-4, allocating the remaining allocated power according to the ratio of the rated power of the second type lithium battery module to determine the output set power of the second type lithium battery module.

[0096] Among them, the second type of lithium battery module is a currently working lithium battery module whose output set power is less than the rated power.

[0097] It should be understood that according to the division of full-load power allocation groups and non-full-load power allocation groups, the lithium batteries and lithium battery modules in the full-load power allocation groups are allocated power according to the rated power, which can ensure the efficient utilization of the lithium batteries and lithium battery modules. The non-full-load power allocation groups are allocated according to the proportion of the rated power. This takes into account the usage of different lithium batteries and lithium battery modules to appropriately allocate power, ensuring their reasonable and efficient utilization. At the same time, these lithium batteries and lithium battery modules are used as supplementary power allocation to fully realize the efficiency of the lithium batteries and lithium battery modules in the full-load power allocation groups.

[0098] In one possible implementation, when the remaining lifespan is less than a preset lifespan threshold, the output set power is equal to a*(i+b)*W / L, where a and b are constants, i is the remaining lifespan, L is the total length of the operating cycle, and W is the rated power. If the sum of the output set powers of all Class II lithium battery modules is less than the remaining allocated power, a new Class II lithium battery module can be introduced to meet the power demand.

[0099] exist Figure 2 On the basis of how to optimize the current power allocation execution plan during the execution of the current power allocation execution plan, the embodiment of the present application also provides a possible implementation method, such as Figure 6 As shown, after S105, the energy storage system power distribution method further includes: S106, which is described in detail as follows.

[0100] S106 , when the current required total power changes, adjusting the lithium battery modules in the power allocation execution plan according to the change in the current required total power.

[0101] The change represents the difference between the latest current total power demand and the previous current total power demand.

[0102] exist Figure 6 Based on the content in S106, the present application embodiment also provides a possible implementation method, please refer to Figure 7 , S106 includes: S106-1, S106-2, S106-3, S106-4, S106-5 and S106-6, which are specifically described as follows.

[0103] S106-1, determine whether the change is greater than 0. If so, execute S106-2; if not, execute S106-5.

[0104] Optionally, during the execution of the current power allocation execution plan, the current power allocation demand is monitored in real time to timely obtain the demand changes, and then respond to the changes in real time to achieve the effect of efficient power allocation.

[0105] S106-2: When the change is greater than 0, at least one group of compensation lithium battery modules is determined from the lithium battery modules in the rest state according to the length of the remaining life.

[0106] Among them, the remaining life of at least one group of compensating lithium battery modules is greater than or equal to the remaining life of unselected lithium battery modules in a resting state, and the total rated power of at least one group of compensating lithium battery modules is greater than or equal to the change.

[0107] Optionally, a change greater than 0 indicates that the total power of the lithium batteries and lithium battery modules in the current power allocation execution plan can no longer meet the power allocation requirements, and therefore lithium batteries and lithium battery modules need to be introduced. The reference parameter for the introduction is also the remaining life. Including the lithium batteries with the longest remaining life can reduce the number of lithium batteries and lithium battery modules to be included, and then quickly formulate a supplementary plan to avoid the situation where the workload increases due to excessive analysis data for lithium batteries and lithium battery modules. In addition, selecting lithium batteries and lithium battery modules with the longest remaining life can also make efficient use of lithium batteries and lithium battery modules.

[0108] S106-3, allocating the variation according to the ratio of the rated power of at least one group of compensation lithium battery modules to determine the output set power of the compensation lithium battery module.

[0109] Optionally, the same as the above S104-4.

[0110] S106-4, the compensating lithium battery module will be regarded as a new second-class lithium battery module.

[0111] S106-5, determining at least one module to be deleted from the set of second-category lithium battery modules.

[0112] The difference between the change amount and the sum of the output set powers of the modules to be deleted is greater than or equal to 0 and less than or equal to a preset difference;

[0113] It should be noted that the sum of the output set powers of the modules to be deleted is less than or equal to the change amount and is close to the change amount. After deletion, it will not affect the normal power distribution.

[0114] S106-6, deleting the module to be deleted from the power allocation execution plan.

[0115] exist Figure 7 Based on the content in S106-5, the present application embodiment also provides a possible implementation method, please refer to Figure 8 , S106-5 includes: S106-5A, S106-5B, S106-5C and S106-5D, which are described in detail as follows.

[0116] S106-5A, determine one module to be deleted from the set of second-category lithium battery modules.

[0117] The output set power of the module to be deleted is less than or equal to the change amount, and the remaining life of the module to be deleted is greater than or equal to the other second-type lithium battery modules whose output set power is less than or equal to the change amount;

[0118] S106-5B, obtain the remaining change.

[0119] The remaining change represents the difference between the change and the sum of the output set powers of the selected modules to be deleted.

[0120] S106-5C, determine whether the remaining change is less than the preset difference. If so, end; if not, execute S106-5.

[0121] S106-5D, determine the remaining change amount as the new change amount.

[0122] After S106-5D, S106-5A is executed.

[0123] It should be understood that when the change is less than 0, indicating that the total power of the current power distribution demand is reduced, if the lithium batteries and lithium battery modules in the power distribution optimization plan are not changed, it will lead to energy waste, thereby reducing the operating efficiency and energy utilization of the lithium battery energy storage system. When discharging lithium batteries and lithium battery modules, first consider the lithium batteries and lithium battery modules with the longest remaining life in the non-full load power distribution group. This can consume lithium batteries and lithium battery modules with short remaining life as soon as possible, making replacement easier, thereby ensuring that the lithium battery energy storage system is in the most efficient operating state, and preventing these lithium batteries and lithium battery modules with short life cycles and low energy utilization from lowering the overall efficiency of the lithium battery energy storage system.

[0124] See also Figure 9 , Figure 9 An embodiment of the present application provides a power distribution device for an energy storage system. Optionally, the power distribution device for an energy storage system is applied to the electronic device described above.

[0125] The energy storage system power distribution device includes: a processing unit 201 and an information transceiver unit 202.

[0126] The processing unit 201 is configured to adjust the lithium battery modules in the allocation template scheme according to a comparison result between the first total power and the current required total power to form a basic power allocation scheme;

[0127] Among them, the first total power is the sum of the rated powers of each lithium battery module in the allocation template solution, the current required total power represents the current power allocation demand, and the sum of the rated powers of each lithium battery module in the power allocation basic solution is greater than or equal to the current required total power;

[0128] The processing unit 201 is further configured to determine the output set power of each lithium battery module based on the remaining life of each lithium battery module and the current total power demand in the power allocation basic plan to generate a current power allocation execution plan;

[0129] The current power allocation execution plan includes the current working lithium battery module and the output set power corresponding to the current working lithium battery module. The current working lithium battery module is a lithium battery module used to supply power when the current power allocation execution plan is executed. The sum of the output set powers of all the current working lithium battery modules is equal to the current required total power.

[0130] The information transceiver unit 202 is used for the management device to send the corresponding output setting power to the controller in the current working lithium battery module to execute the current power allocation execution plan.

[0131] Optionally, the processing unit 201 may execute the above-mentioned S101 to S104 and S106, and the information transceiver unit 202 may execute the above-mentioned S105.

[0132] It should be noted that the energy storage system power distribution device provided in this embodiment can execute the method flow shown in the above method flow embodiment to achieve the corresponding technical effects. For the sake of brevity, any part not mentioned in this embodiment can be referred to the corresponding content in the above embodiment.

[0133] The present application also provides a storage medium storing computer instructions and programs that, when read and executed, execute the energy storage system power allocation method described above. The storage medium may include memory, flash memory, registers, or a combination thereof.

[0134] The following provides an electronic device, which can be a management device in the power distribution of the energy storage system. Figure 1 As shown, the above-described energy storage system power allocation method can be implemented. Specifically, the electronic device includes: a processor 10, a memory 11, and a bus 12. The processor 10 may be a CPU. The memory 11 is used to store one or more programs. When the one or more programs are executed by the processor 10, the energy storage system power allocation method of the above-described embodiment is executed.

[0135] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes 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 flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0136] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0137] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0138] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

[0139] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A power distribution method for an energy storage system, characterized in that: A management device applied to an energy storage system, the energy storage system further comprising at least two lithium battery modules, the management device being communicatively connected to a controller in each lithium battery module, the method comprising: Adjusting the lithium battery modules in the allocation template scheme based on a comparison result between the first total power and the currently required total power to form a basic power allocation scheme, including: when the first total power is greater than a preset multiple of the currently required total power, deleting at least one lithium battery module in the allocation template scheme to form a basic power allocation scheme; wherein the sum of the rated powers of the respective lithium battery modules in the basic power allocation scheme is less than or equal to the preset multiple of the currently required total power; The first total power is the sum of the rated powers of the lithium battery modules in the allocation template scheme, the current required total power represents the current power allocation demand, and the sum of the rated powers of the lithium battery modules in the power allocation basic scheme is greater than or equal to the current required total power; Based on the remaining life of each lithium battery module in the power allocation basic scheme and the current required total power, the output set power of each lithium battery module is determined to generate a current power allocation execution plan, including: obtaining the remaining life of each lithium battery module in the power allocation basic scheme; determining the lithium battery module with a remaining life greater than or equal to a preset life threshold as a first-category lithium battery module, wherein the output set power of the first-category lithium battery module is the rated power; determining the lithium battery module with a remaining life less than the preset life threshold as a second-category lithium battery module; allocating the remaining allocated power according to the ratio of the rated power of the second-category lithium battery module to determine the output set power of the second-category lithium battery module; wherein the second-category lithium battery module is a currently working lithium battery module whose output set power is less than the rated power; The current power allocation execution plan includes a currently working lithium battery module and an output set power corresponding to the currently working lithium battery module. The currently working lithium battery module is a lithium battery module used to supply power when the current power allocation execution plan is executed. The sum of the output set powers of all currently working lithium battery modules is equal to the current required total power. The management device sends the corresponding output setting power to the controller in the currently working lithium battery module to execute the current power allocation execution plan.

2. The energy storage system power distribution method according to claim 1, characterized in that: Before adjusting the lithium battery modules in the allocation template scheme based on the comparison result of the first total power and the current required total power to form a basic power allocation scheme, the method further includes: Determining the most recent historical power allocation plan as an allocation template plan, wherein the historical power allocation plan includes historically working lithium battery modules and output set powers corresponding to the historically working lithium battery modules, the historically working lithium battery modules being lithium battery modules used to supply power when executing the historical power allocation plan, and the sum of the output set powers of all historically working lithium battery modules being equal to the historical total power corresponding to the historical power allocation plan; When there is a newly added lithium battery module, replace the historical working lithium battery modules in the allocation template solution with the newly added lithium battery module to complete the update of the allocation template solution; Among them, the newly added lithium battery module is a lithium battery module newly added to the energy storage system after the generation of the historical power distribution solution.

3. The energy storage system power distribution method according to claim 1, characterized in that: The step of adjusting the lithium battery modules in the allocation template solution according to the comparison result between the first total power and the current required total power to form a power distribution basic solution includes: In the case where the first total power is less than the current required total power, add at least one lithium battery module in the rest state to the allocation template solution to form a power distribution basic solution; In the case where the first total power is greater than a preset multiple of the current required total power, delete at least one lithium battery module in the allocation template solution to form a power distribution basic solution; among them, the sum of the rated powers of each lithium battery module in the power distribution basic solution is less than or equal to a preset multiple of the current required total power.

4. The energy storage system power distribution method according to claim 1, characterized in that: During the execution of the current power distribution execution plan, the method further includes: When the current required total power changes, adjust the lithium battery modules in the power distribution execution plan according to the change amount of the current required total power, where the change amount represents the difference between the latest current required total power and the previous current required total power.

5. The energy storage system power distribution method according to claim 4, characterized in that: The step of adjusting the lithium battery modules in the power distribution execution plan according to the change amount of the current required total power includes: When the change amount is greater than 0, determine at least one group of compensated lithium battery modules from the lithium battery modules in the rest state according to the length of the remaining life, where the remaining life of the at least one group of compensated lithium battery modules is greater than or equal to the remaining life of the unselected lithium battery modules in the rest state, and the sum of the rated powers of the at least one group of compensated lithium battery modules is greater than or equal to the change amount; Allocate the change amount according to the ratio of the rated powers of the at least one group of compensated lithium battery modules to determine the output set power of the compensated lithium battery modules; Use the compensated lithium battery modules as new second-class lithium battery modules; When the change amount is less than 0, determine at least one module to be deleted from the set of second-class lithium battery modules, where the difference between the change amount and the sum of the output set powers of the modules to be deleted is greater than or equal to 0 and less than or equal to a preset difference; Delete the module to be deleted from the power distribution execution plan.

6. The energy storage system power distribution method according to claim 5, characterized in that: The step of determining at least one module to be deleted from the set of second-class lithium battery modules includes: Determine 1 module to be deleted from the set of second-class lithium battery modules, where the output set power of the module to be deleted is less than or equal to the change amount, and the remaining life of the module to be deleted is greater than or equal to the remaining lives of other second-class lithium battery modules whose output set powers are less than or equal to the change amount; Obtain the remaining change amount, where the remaining change amount represents the difference between the change amount and the sum of the output set powers of the selected modules to be deleted; Determining whether the remaining variation is less than the preset difference; If so, then end; If not, the remaining variation is determined as a new variation; Repeat the process of determining a module to be deleted from the set of lithium battery modules of the second type until the remaining change is less than the preset difference.

7. A power distribution device for an energy storage system, characterized in that: A management device for an energy storage system, wherein the energy storage system further comprises at least two lithium battery modules, wherein the management device is communicatively connected to a controller in each lithium battery module, and wherein the device comprises: a processing unit, configured to adjust the lithium battery modules in the allocation template scheme based on a comparison result between the first total power and the currently required total power to form a basic power allocation scheme, including: when the first total power is greater than a preset multiple of the currently required total power, deleting at least one lithium battery module in the allocation template scheme to form a basic power allocation scheme; wherein the sum of the rated powers of the respective lithium battery modules in the basic power allocation scheme is less than or equal to the preset multiple of the currently required total power; The first total power is the sum of the rated powers of the lithium battery modules in the allocation template scheme, the current required total power represents the current power allocation demand, and the sum of the rated powers of the lithium battery modules in the power allocation basic scheme is greater than or equal to the current required total power; The processing unit is further configured to determine the output set power of each lithium battery module based on the remaining life of each lithium battery module in the power allocation basic scheme and the current required total power, so as to generate a current power allocation execution plan, including: obtaining the remaining life of each lithium battery module in the power allocation basic scheme; determining a lithium battery module having a remaining life greater than or equal to a preset life threshold as a first-category lithium battery module, wherein the output set power of the first-category lithium battery module is the rated power; determining a lithium battery module having a remaining life less than a preset life threshold as a second-category lithium battery module; allocating the remaining allocated power according to the ratio of the rated power of the second-category lithium battery module to determine the output set power of the second-category lithium battery module; wherein the second-category lithium battery module is a currently working lithium battery module whose output set power is less than the rated power; The current power allocation execution plan includes a currently working lithium battery module and an output set power corresponding to the currently working lithium battery module. The currently working lithium battery module is a lithium battery module used to supply power when the current power allocation execution plan is executed. The sum of the output set powers of all currently working lithium battery modules is equal to the current required total power. An information transceiver unit is used for the management device to send the corresponding output setting power to the controller in the currently working lithium battery module to execute the current power allocation execution plan.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

9. An electronic device, characterized in that: include: a processor and a memory, the memory being configured to store one or more programs; When the one or more programs are executed by the processor, the method according to any one of claims 1 to 6 is implemented.

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