Energy storage device circuit determination method and related device

Abstract

The present invention discloses a method for determining the line of an energy storage device and a related device, which is applied to an electric energy management system of an energy storage system, wherein the energy storage system includes multiple lines, and the method includes: after receiving registration information sent by a first energy storage device, sending test control information to the first energy storage device; the first energy storage device is a new energy storage device, and the test control information is used to instruct the first energy storage device to operate according to a first charge and discharge strategy within a preset time period; obtaining the first circuit data of N branches within a preset time period, wherein the first circuit data includes current or power; matching the first circuit data of the N branches with the second circuit data corresponding to the first charge and discharge strategy; determining the branch line that successfully matches the first circuit data with the second circuit data as the target branch line connected to the first energy storage device, wherein the target branch line is one of the N branches. By implementing this method, the problem that the energy storage system cannot determine the line to which the connected energy storage device belongs is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to a method for determining a line of an energy storage device and a related device. Background Art

[0002] In the energy storage system, the energy management system (EMS) controls the energy storage devices and electrical appliances in the bus and multiple branches of the distribution network. For the convenience of management, one or more energy storage devices in the energy storage system usually need to ensure the same specifications / models and be installed at the bus, so that the energy management system can control the operating current, power, mode and other operating parameters of one or more energy storage devices based on the protection current and other parameters of the bus and branches.

[0003] Under the existing architecture, since each branch line will not be equipped with a separate power management device, the power management device and the battery management system (BMS) of each energy storage device itself cannot determine the line where each energy storage device is located based on the large number of electrical signals with unknown sources and flows in the distribution network. Users or professional installers are required to determine the line to which the newly installed energy storage device belongs, which leads to the problem that the energy storage system cannot automatically determine the line to which the connected energy storage device belongs. Summary of the invention

[0004] In response to the above problems, the example of the present application provides a method and related apparatus for determining the line of an energy storage device. The solution of the present application is helpful in solving the problem that the energy storage system cannot automatically determine the line to which the connected energy storage device belongs.

[0005] To achieve the above-mentioned purpose, in a first aspect, an embodiment of the present application provides a line determination method for an energy storage device, which is applied to a control device and an electric energy management device of an energy storage system, wherein the energy storage system also includes N branches, and the N branches are connected in parallel, and the method includes: after receiving registration information sent by a first energy storage device, sending test control information to the first energy storage device; wherein the first energy storage device is an energy storage device that is newly connected to the energy storage system and is not in operation, and the test control information is used to instruct the first energy storage device to operate according to a first charging and discharging strategy within a preset time period; obtaining first circuit data of the N branches within a preset time period, the first circuit data including at least one of current or power; matching the first circuit data of the N branches with second circuit data corresponding to the first charging and discharging strategy; determining a branch for which the first circuit data and the second circuit data are successfully matched as a target branch for access by the first energy storage device, and the target branch is one of the N branches.

[0006] It can be seen that in the embodiment of the present application, after the power management device determines that a new first energy storage device is connected to the energy storage system, by controlling the first energy storage device to operate according to the first charging and discharging strategy, the target branch where the first energy storage device is located is determined based on whether the first circuit data and the second circuit data of multiple branches within a preset time period match, thereby solving the problem of being unable to determine the target branch corresponding to the newly connected first energy storage device.

[0007] In combination with the first aspect, in a possible embodiment, before sending test control information to the first energy storage device, the method also includes: obtaining current system information of the energy storage system, the system information including the current third current and protection current of each of the N branches, the protection current being the maximum current value that the corresponding branch can carry; if the difference between the protection current of each of the N branches minus the third current is greater than a preset difference, then discharging the first energy storage device at a first preset power, switching the operating state / standby state at a preset time interval, and continuing for a preset time to determine a first charging and discharging strategy, so that when the first energy storage device operates according to the first charging and discharging strategy, the second and third current values ​​of the N branches do not exceed the corresponding protection current.

[0008] It can be seen that in the embodiment of the present application, when the first charge and discharge strategy of the first energy storage device cannot be directly determined by the difference between the protection current of each line and the third current, the first charge and discharge strategy of the first energy storage device is determined by the operating status of multiple lines, thereby ensuring the circuit safety when the first energy storage device operates according to the first charge and discharge strategy.

[0009] In combination with the first aspect, in a possible embodiment, at least one of the N branches includes a second energy storage device, and the second energy storage device is an energy storage device in an operating state; if the difference between the protection current of any one of the N branches and the third current is not greater than a preset difference, the method further includes: determining the line status of the N branches, the line status includes a charging state or a feeding state, all the second energy storage devices on the branches in the charging state are in a charging state, and all the second energy storage devices on the branches in the feeding state are in a feeding state; if the line status of the N branches is all in a charging state, then the first charging and discharging strategy is determined according to the first energy storage device discharging with a first preset power, switching the operating state / standby state at a preset time interval, and continuing for a preset time; if the line status of the N branches is all in a feeding state, then the first charging and discharging strategy is determined according to the first energy storage device charging with a second preset power, switching the operating state / standby state at a preset time interval, and continuing for a preset time.

[0010] It can be seen that in the embodiment of the present application, when the first charge and discharge strategy of the first energy storage device cannot be directly determined by the difference between the protection current of each line and the third current, the first charge and discharge strategy of the first energy storage device is determined by the operating status of multiple lines, thereby ensuring the circuit safety when the first energy storage device operates according to the first charge and discharge strategy.

[0011] In combination with the first aspect, in a possible embodiment, the energy storage system further includes a bus, N branches are connected in series with the bus, and if the line state of at least one of the N branches is a charging state, and the line state of at least one of the N branches is a feeding state, the method further includes: obtaining a grid connection state of the energy storage system, the grid connection state includes a grid-connected state or an off-grid state, the energy storage system is connected to the mains network in the grid-connected state, and the energy storage system is not connected to the mains network in the off-grid state; if the grid connection state of the energy storage system is a grid-connected state, then according to the discharge power of all second energy storage devices in the line whose operating state is a feeding state, the first energy storage device is charged with the second preset power, and the operating state / standby state is switched at a preset time interval, and the first charging and discharging strategy is determined for a preset time; if the grid connection state of the energy storage system is an off-grid state, then according to controlling the second energy storage device being charged among the multiple second energy storage devices to stop charging, the first energy storage device is charged with the second preset power, and the operating state / standby state is switched at a preset time interval, and the first charging and discharging strategy is determined for a preset time.

[0012] It can be seen that in the embodiment of the present application, the first charging and discharging strategy of the first energy storage device is determined according to the grid connection state of the energy storage system, and then when the first energy storage device operates according to the first charging and discharging strategy, the current pressure of the N branches is reduced, thereby ensuring the circuit safety when the first energy storage device operates according to the first charging and discharging strategy.

[0013] In combination with the first aspect, in a possible embodiment, the first circuit data includes a first current, and the second circuit data includes a second current; the first circuit data of the N branches are matched with the second circuit data corresponding to the first charging and discharging strategy, including: generating a second current waveform based on the second current; generating a first current waveform of the N branches based on the first current in the first circuit data of the N branches; matching the first current waveforms of the N branches with the second current waveforms, respectively; and determining the matching result of the first current waveform and the second current waveform of the N branches as the matching result of the first circuit data and the second circuit data of the N branches.

[0014] It can be seen that in the embodiment of the present application, a second current waveform is generated according to the second current data, and first current waveforms of multiple lines are generated according to the first current data of multiple lines, and then the characteristics of the current data in each line are reflected by the first current waveform, so that the branch corresponding to the first current waveform matching the second current waveform is determined as the target branch, thereby improving the efficiency and accuracy of determining the target branch.

[0015] In combination with the first aspect, in a possible embodiment, after matching the first circuit data of N branches with the second circuit data corresponding to the first charging and discharging strategy, the method also includes: if the first circuit data of the N branches fail to match the second circuit data, repeatedly executing the steps of obtaining the current system information of the energy storage system and subsequent steps, and recording the number of repeated executions, until the first circuit data of any one of the N branches successfully matches the second circuit data, or the number of repeated executions exceeds a preset number; if the number of repeated executions is greater than the preset number, the method also includes: sending operation control information to the first energy storage device, the operation control information being used to instruct the first energy storage device to operate in charging mode or standby mode.

[0016] It can be seen that in the embodiment of the present application, when the first circuit data of N branches all match the second circuit data, the target branch is determined by repeated execution. If the target branch cannot be determined after repeating the preset number of times, the first energy storage device is controlled to operate only in the charging mode or the standby mode, thereby ensuring the safe operation of the energy storage system and improving the stability of the energy storage system.

[0017] In a second aspect, an embodiment of the present application provides a line determination device for an energy storage device, which is used to execute a line determination method for an energy storage device. The device belongs to an energy storage system, and the energy storage system further includes N branches, and the N branches are connected in parallel. The device includes:

[0018] A sending unit, configured to send test control information to the first energy storage device after receiving the registration information sent by the first energy storage device; wherein the first energy storage device is an energy storage device that is newly connected to the energy storage system and is not in operation, and the test control information is used to instruct the first energy storage device to operate according to the first charging and discharging strategy within a preset time period;

[0019] an acquisition unit, configured to acquire first circuit data of the N branches within a preset time period, the first circuit data including at least one of current or power;

[0020] A matching unit, used for matching the first circuit data of the N branches with the second circuit data corresponding to the first charging and discharging strategy;

[0021] The determination unit is used to determine the branch line that successfully matches the first circuit data with the second circuit data as a target branch line for access of the first energy storage device, where the target branch line is one of the N branches.

[0022] In a third aspect, an embodiment of the present application provides an electronic computer device, comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more computer programs are stored in the memory and configured to be executed by the processor, and the one or more computer programs are used to execute part or all of the method of the first aspect.

[0023] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program for electronic data exchange, wherein the computer program enables a computer processor to execute part or all of the method of the first aspect.

[0024] In a fifth aspect, the present application provides a computer program product. When a computer reads and executes the computer program product, the computer executes the method in any possible design of the first aspect above.

[0025] It can be understood that the beneficial effects of the embodiments of the second to fifth aspects can refer to the beneficial effects of the method of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of an application scenario of a method for determining a circuit of an energy storage device provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of a flow chart of a method for determining a circuit of an energy storage device provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of a second current waveform provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of a current waveform of a target branch provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of a current waveform of another branch provided in an embodiment of the present application;

[0032] Figure 6 A schematic diagram of a flow chart of another method for determining a line of an energy storage device provided in an embodiment of the present application;

[0033] Figure 7 A schematic diagram of selecting a first charging and discharging strategy provided in an embodiment of the present application;

[0034] Figure 8 A schematic diagram of a process flow for repeatedly executing line determination provided in an embodiment of the present application;

[0035] Fig. 9 A schematic diagram of the structure of a circuit determination device for an energy storage device provided in an embodiment of the present application;

[0036] Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The embodiments of the present application are described below in conjunction with the accompanying drawings.

[0041] See also Figure 1 , Figure 1A schematic diagram of an application scenario of a method for determining a line of an energy storage device provided in an embodiment of the present application, wherein the application scenario 100 includes an energy management device 101, a first energy storage device 102, a second energy storage device 103, a bus 104 of a distribution network, and multiple branches 105, wherein the energy management device 101 is specifically an energy storage system management device (Energy Management System, EMS) used to manage energy storage devices (including the first energy storage device 102 and the second energy storage device 103) in multiple branches 105 and other devices such as electrical appliances. The energy management device 101 is connected to the energy storage system through a distribution network, where the distribution network is specifically a microgrid or a home grid including a bus 104 or a branch 105.

[0042] The energy storage device here specifically refers to an energy storage battery cell, an energy storage battery module, an energy storage battery cluster or an energy storage battery cabinet. The energy storage device specifically also includes a battery management system, an inverter and a battery cell.

[0043] The energy storage device is connected to the power distribution network through any one of the multiple branch lines 105 , that is, the multiple branch lines 105 here in the application scenario 100 include five branch lines 105 L1-L5.

[0044] The first energy storage device 102 is an energy storage device that is newly connected to the energy storage system and is not in operation. The energy storage device that is newly connected to the energy storage system specifically refers to the branch line (one of L1-L5) to which the power management device 101 has not determined the energy storage device is connected. Not in operation means that the energy storage device is not in charging, discharging or standby state according to the instruction of the power management device 101. In contrast, the second energy storage device 103 is a branch line to which the power management device 101 has determined the connection, and can be in charging, discharging or standby state according to the instruction of the power management device 101.

[0045] A plurality of branch lines 105 are connected in parallel, and a plurality of branch lines 105 are connected in series with a bus 104, and one side of the bus 104 is connected to the grid side, so that the energy storage device can output current to the grid, or be charged by current input from the grid.

[0046] When the bus 104 is connected to the grid, the energy storage system is in a grid-connected state, and the first energy storage device 102 and the second energy storage device 103 in the multiple branches 105 can store the electric energy provided by the grid, output the electric energy to the grid, and supply power to other electrical appliances in the multiple branches 105.

[0047] When the bus 104 is disconnected from the grid, the energy storage system is in an off-grid state. The first energy storage device 102 and the second energy storage device 103 in the multiple branches 105 cannot output current to the grid or charge according to the current input from the grid. They can only supply power to other electrical appliances and energy storage devices in the multiple branches 105.

[0048] Other electrical equipment here include but are not limited to various household appliances such as televisions, refrigerators, air conditioners, as well as charging equipment such as car charging piles.

[0049] Each branch line 105 of the plurality of branch lines 105 can be connected to one or more energy storage devices, or can be connected to no energy storage device but only to an electrical device, for example, two first energy storage devices 102 are connected to L2.

[0050] In addition, the power management device 101 also communicates with multiple energy storage devices through local area networks, the Internet of Things, etc. Figure 1 As shown, after the second energy storage device 103 is connected to line L5, the power management device 101 has not yet determined which branch line 105 the target energy storage is connected to is one of L1-L5, so the power management device 101 needs to determine the line corresponding to the power management system 101 through the first charging and discharging strategy.

[0051] In the embodiment of the present application, after receiving the registration information sent by the first energy storage device 102, the power management device 101 sends the test control information to the first energy storage device 102. After the first energy storage device 102 is connected to one of the multiple lines, the battery management system of the first energy storage device 102 is powered on and runs, communicates with the power management device 101 through wireless network, Internet of Things, electrical signal communication, etc., and sends registration information to the power management device 101 through broadcasting, etc. to provide the device model, remaining energy status and other information of the first energy storage device 102, and requests the power management device 101 to allocate a communication address. The power management device 101 allocates a communication address to the first energy storage device 102 according to the registration information sent by the first energy storage device 102, thereby sending the test control information to the first energy storage device 102. Thereby, the first energy storage device 102 operates according to the first charging and discharging strategy.

[0052] The power management device 101 controls the first energy storage device 102 to operate according to the first charge and discharge strategy in a preset time period, and obtains the first circuit data of the five branches in the preset time period through the circuit data detection device (such as a voltmeter, an ammeter, etc.) installed on each branch line. The first circuit data here specifically includes one or more of current, voltage, power, etc.

[0053] The power management device 101 matches the first circuit data of the five branches with the second circuit data corresponding to the first charge and discharge strategy. The second circuit data corresponding to the first charge and discharge strategy here is the standard circuit data that should be obtained when the energy storage device is operated according to the first charge and discharge strategy and there is no interference from other energy storage devices or electrical appliances in the line. The second circuit data is specifically pre-stored locally in the power management device 101, and different first charge and discharge strategies correspond to different second circuit data.

[0054] The power management device 101 determines the branch line that successfully matches the first circuit data with the second circuit data as the target branch line connected to the first energy storage device 102, and the target branch line is one of the N branches. The successful match here specifically refers to the first circuit data and the second circuit data being exactly the same, the similarity being greater than a preset threshold, or the data corresponding.

[0055] After determining the target branch line (i.e. Figure 1 After L5 is shown, the power management device 101 can control the operation of all energy storage devices based on the rated power, current, protection current of each branch line 105 and other data of the energy storage devices on each branch line 105.

[0056] It can be seen that in the embodiment of the present application, after the power management device determines that a new first energy storage device is connected to the energy storage system, by controlling the first energy storage device to operate according to the first charging and discharging strategy, the target branch where the first energy storage device is located is determined based on whether the first circuit data and the second circuit data of multiple branches within a preset time period match, thereby solving the problem of being unable to determine the target branch corresponding to the newly connected first energy storage device.

[0057] See also Figure 2 , Figure 2 A schematic diagram of a flow chart of a method for determining a line of an energy storage device provided in an embodiment of the present application, which can be based on Figure 1 The application scenario shown is implemented as follows Figure 2 As shown, steps S201-S204 are included.

[0058] S201: After receiving the registration information sent by the first energy storage device, the power management device sends test control information to the first energy storage device; wherein the first energy storage device is an energy storage device that is newly connected to the energy storage system and is not in operation, and the test control information is used to instruct the first energy storage device to operate according to the first charging and discharging strategy within a preset time period.

[0059] Furthermore, after receiving the registration information, the power management device determines the registration status of the first energy storage device that sends the registration information. If the registration status of the first energy storage device is registered, a communication address is allocated to the first energy storage device and step S202 and subsequent steps are executed.

[0060] If the registration status of the first energy storage device is unregistered, the first energy storage device needs to be registered, and the registration operation here includes obtaining the device information of the first energy storage device. After completing the registration operation of the energy storage device, the registration status of the first energy storage device is updated to registered, and the power management device allocates a communication address to the energy storage device.

[0061] In a possible embodiment, after the power management device receives the registration information sent by the first energy storage device, the first energy storage device sends the registration information to the power management device according to the target branch and / or bus after connecting to the target branch. The registration information here is sent to the power management device in the form of an electrical signal. Since the energy storage device can send the registration information to the power management device through a communication link or circuit, but if the first energy storage device can operate based on its own stored electric energy, the energy storage device can communicate with the power management device without being connected to the target branch. In this case, the power management device also needs to determine whether the energy storage device is connected to the target branch. The first energy storage device sends the registration information to the power management device through a circuit in the form of an electrical signal, provided that the first energy storage device has been connected to the target branch, and it is not necessary to determine whether the energy storage device is connected to the target branch. Therefore, in the embodiment of the present application, the first energy storage device sends the registration information to the power management device through a circuit in the form of an electrical signal.

[0062] S202: The power management device obtains first circuit data of N branches within a preset time period, where the first circuit data includes at least one of current or power.

[0063] Specifically, the first charging and discharging strategy here includes the operating mode of the first energy storage device (including a charging mode and a feeding mode, in which the energy storage device is charged by the current input from the grid side or the current input from other energy storage devices, and in the feeding mode, the energy storage device outputs current to the electrical appliance, the grid side or other energy storage devices), operating parameters such as operating current and operating time, so that the first energy storage device operates according to the operating parameters set by the first charging and discharging strategy, thereby changing the circuit data in the line where the first energy storage device is located, so that the power management device obtains the first circuit data of multiple lines within a preset time period, and determines the target branch where the first energy storage device is located according to whether the first circuit data and the second circuit data of each line match.

[0064] S203: The power management device matches the first circuit data of the N branches with the second circuit data corresponding to the first charging and discharging strategy.

[0065] Specifically, the second circuit data here is the standard circuit data on the line where the energy storage device is located after operating according to the first charge and discharge strategy. In an ideal scenario, after the first energy storage device operates according to the first charge and discharge strategy, the branch line where the first energy storage device is located will present circuit data that is the same as the second circuit data.

[0066] In a possible embodiment, the first circuit data includes a first current, and the second circuit data includes a second current; the first circuit data of the N branches are matched with the second circuit data corresponding to the first charging and discharging strategy, including: generating a second current waveform based on the second current; generating a first current waveform of the N branches based on the first current in the first circuit data of the N branches; matching the first current waveforms of the N branches with the second current waveforms respectively; and determining the matching result of the first current waveform and the second current waveform of the N branches as the matching result of the first circuit data and the second circuit data of the N branches.

[0067] Specifically, in an embodiment of the present application, the power management device determines the target branch line to which the first energy storage device is connected based on the similarity between the current data of multiple lines and the target current data. The first energy storage device operates according to the first charging and discharging strategy within a preset time period, affecting the current data of the branch line where the first energy storage device is located, so that the current data in the branch line where the first energy storage device is located is different from the current data of other lines. The current data here is obtained by the power management system based on the current transformer and other measuring devices configured in each branch line.

[0068] The first charge and discharge strategy here can specifically require the first energy storage device to operate according to the specified operating mode, operating current, operating duration and other operating parameters. Exemplarily, the first charge and discharge strategy requires the energy storage device to operate in the charging mode, with a charging power of 500W, switch between the charging / standby state at an interval of 0.5s, and operate for 10s. The following description is based on the first charge and discharge strategy of the above example.

[0069] After the energy storage system runs for 10 seconds, the power management system obtains the first current data of multiple lines within these 10 seconds. The power management system obtains the second current data corresponding to the first charging and discharging strategy.

[0070] The power management device generates a first current waveform of N branches according to the first current data of the plurality of lines, and generates a second current waveform according to the second current data, so as to determine the line corresponding to the current waveform matching the second current waveform among the first current waveforms of the N branches as the target branch. For example, see Figure 3 , Figure 3A schematic diagram of a second current waveform provided in an embodiment of the present application, in which it can be seen that after the first energy storage device operates according to the first charging and discharging strategy without the influence of other energy storage devices and electrical appliances, the corresponding second current data can be obtained, and then the second current data can be generated Figure 3 The special waveform shown is the second current waveform.

[0071] See also Figure 4 , Figure 4 A schematic diagram of a current waveform of a target branch provided in an embodiment of the present application, where the target branch is the line where the first energy storage device is located, it can be seen that a special waveform similar to the target current waveform appears in the target branch, but the amplitude of the waveform is different, such as Figure 3 The amplitude in the second current waveform is 2A, while the amplitude in the first current waveform of the target branch is 1.8A. However, the wavelength of the second current waveform is the same as that in the current waveform of the target branch, which is 1s, and the entire waveform lasts for 10s. In this embodiment of the present application, if the difference between the amplitude of the target branch and the amplitude of the target current waveform is less than the preset difference, the image is also judged to match the target current waveform. The preset difference here is determined according to the amplitude of the target current waveform. For example, if the amplitude of the second current waveform is 3A, the difference within 20% can be regarded as a match, that is, the amplitude of the current waveform is any value between 2.4A-3.4A, and the corresponding line can be determined as the target branch.

[0072] See also Figure 5 , Figure 5 A schematic diagram of a current waveform of another branch provided in an embodiment of the present application, wherein the other branch is a branch that will not be affected by the first energy storage device. Figure 5 During the time interval shown, the current waveforms of the other branches remain at 7 A without fluctuation, and thus do not match the target current waveform.

[0073] It can be seen that in the embodiment of the present application, a second current waveform is generated according to the second current data, and first current waveforms of multiple lines are generated according to the first current data of multiple lines, and then the characteristics of the current data in each line are reflected by the first current waveform, so that the branch corresponding to the first current waveform matching the second current waveform is determined as the target branch, thereby improving the efficiency and accuracy of determining the target branch.

[0074] S204: The power management device determines the branch line for which the first circuit data and the second circuit data are successfully matched as a target branch line for access of the first energy storage device, where the target branch line is one of the N branches.

[0075] Specifically, the power management system determines the target branch line based on the degree of difference between the circuit data of each line and the target current data, and the target branch line is the one with the highest degree of similarity between the corresponding circuit data and the target current data.

[0076] Furthermore, if the power management device receives registration information sent by multiple first energy storage devices, it instructs the multiple first energy storage devices to operate according to the first charging and discharging strategy based on the order in which the multiple first energy storage devices send the registration information, thereby determining the target branch of each energy storage device at one time.

[0077] In a possible embodiment, after matching the first circuit data of N branches with the second circuit data corresponding to the first charging and discharging strategy, the method also includes: if the first circuit data matching the second circuit data among the N branches is unique, then determining the branch where the first circuit data successfully matches the second circuit data as the target branch to which the first energy storage device is connected; if the first circuit data matching the second circuit data among the N branches is not unique, then obtaining the similarity of multiple first circuit data matching the second circuit data; and determining the branch corresponding to the first circuit data with the highest similarity as the target branch.

[0078] Specifically, the target branch where the first energy storage device is located is supplying power to energy storage devices or electrical equipment in other branches. This may also cause the first circuit data of other lines to be similar to the second circuit data, thereby causing the power management device to misjudge the match between the first circuit data and the second circuit data of other branches.

[0079] In an embodiment of the present application, if there is a match between the first circuit data and the second circuit data of multiple branches, the power management device obtains the similarity of multiple first circuit data that match the second circuit data. If the circuit data here (including the first circuit data and the second circuit data) includes current data, the similarity here can be determined based on the absolute value of the difference between the amplitude of the current waveform in the circuit data and the amplitude of the current waveform. For example, the amplitude of the first current waveform generated according to the first circuit data of L1 is 2A, the amplitude of the first current waveform generated according to the first circuit data of L2 is 1.8A, and the amplitude of the second current waveform generated according to the second circuit data is 2.2A. The similarity of the first circuit data of L1 is higher than the similarity of the first circuit data of L2.

[0080] For the target branch where the first energy storage device is located, when the first energy storage device discharges and supplies electric energy to electrical appliances in other lines or the energy storage device receives electric energy from energy storage devices in other branches, the current will pass through longer wires and more devices, resulting in more current losses. Therefore, the amplitude of the current waveform corresponding to the current data measured on the target branch where the first energy storage device is located will be higher than the amplitude of the current waveform corresponding to the current data measured on other branches, which in turn causes the similarity of the first circuit data of the target branch to be higher than the similarity of the first circuit data of other branches. Therefore, the first circuit data with the highest similarity in the power management system is determined as the target image.

[0081] It can be seen that in an embodiment of the present application, when the circuit data matching the second circuit data in the first circuit data of N branches is not unique, the target branch is determined by the similarity corresponding to the current waveform of each branch, thereby improving the success rate and accuracy of line determination.

[0082] In the aforementioned application embodiment, a method for determining the line of the energy storage device of the target branch line by using the first charging and discharging strategy is described. Based on this, a method for determining the line of the energy storage device of different first charging and discharging strategies according to the current system information of the energy storage system is also provided in the present application embodiment. Figure 6 , Figure 6 A schematic flow chart of another method for determining a line of an energy storage device provided in an embodiment of the present application includes steps S601-S606:

[0083] S601: After receiving the registration information sent by the first energy storage device, the power management device sends test control information to the first energy storage device; wherein the first energy storage device is an energy storage device that is newly connected to the energy storage system and is not in operation, and the test control information is used to instruct the first energy storage device to operate according to the first charging and discharging strategy within a preset time period.

[0084] S602: The power management device obtains current system information of the energy storage system. The system information includes the current third current and protection current of each branch line among the N branches. The protection current is the maximum current value that the corresponding branch line can carry.

[0085] Specifically, the system information here is the current, voltage, power, protection current, operating status and other information of multiple lines (including bus and branch lines) in the energy storage system obtained by the power management device. In the embodiment of the present application, the system information obtained by the power management device includes the current third current and protection current of each line. The third current here is the overall current in the corresponding line, and the protection current here is used to indicate the maximum current value that the corresponding line can carry.

[0086] S603: If the difference between the protection current of each branch line in the N branches and the third current is greater than the preset difference, the power management device determines the first charge and discharge strategy according to the first preset power of the first energy storage device, switches the operation state / standby state according to the preset time interval, and continues for a preset time, so that when the first energy storage device operates according to the first charge and discharge strategy, the second and third current values ​​of the N branches do not exceed the corresponding protection current.

[0087] Specifically, the first charge and discharge strategy includes switching the charging / standby state according to a preset current and frequency, or includes switching the discharging / standby state according to a preset current and frequency. This affects the current value of the corresponding line, so that the power management device can identify the target route according to the current value of each line. However, since each route has a different protection current, in order to prevent the first energy storage device from causing the maximum current of any line to exceed the protection current when executing the first charge and discharge strategy, thereby causing a safety hazard due to line overload, the power management device determines the first charge and discharge strategy based on the third current and protection current of each line.

[0088] If the difference between the protection current of each branch line and the third current is greater than the preset difference, it proves that the gap between the third current of each line and the maximum protection current is large, and the operation of the first energy storage device will not cause the maximum current of the corresponding target branch line to exceed the maximum protection current. Therefore, the first charge and discharge strategy is determined according to the first energy storage device discharging at the first preset power, switching the operating state / standby state at the preset time interval, and continuing for a preset time. That is to say, the first charge and discharge strategy at least includes the first energy storage device discharging at the first preset power, switching the operating state / standby state at the preset time interval, and continuing for a preset time. In actual applications, it may include more steps and operating parameters, which will not be repeated here.

[0089] If the difference between the protection current of each of the multiple lines and the third current is not greater than the preset difference, it is necessary to consider the operating state of the energy storage system and determine the first charging and discharging strategy of the energy storage device.

[0090] It can be seen that in the implementation of the present application, the first charge and discharge strategy of the first energy storage device is determined according to the difference between the protection current of each line and the third current, and the influence of the third current currently carried by each line is taken into account, so that when the first energy storage device operates according to the first charge and discharge strategy, the maximum current of the corresponding line will not exceed the protection current, thereby ensuring the line safety when the first energy storage device operates according to the first charge and discharge strategy.

[0091] In a possible embodiment, at least one of the N branches includes a second energy storage device, and the second energy storage device is an energy storage device in an operating state; if the difference between the protection current of any branch of the N branches and the third current is not greater than a preset difference, the method further includes: determining the line state of the N branches, the line state includes a charging state or a feeding state, all the second energy storage devices on the branch in the charging state are in the charging state, and all the second energy storage devices on the branch in the feeding state are in the feeding state; if the line state of the N branches is all in the charging state, then the first charging and discharging strategy is determined according to the first energy storage device discharging with a first preset power, switching the operating state / standby state at a preset time interval, and continuing for a preset time; if the line state of the N branches is all in the feeding state, then the first charging and discharging strategy is determined according to the first energy storage device charging with a second preset power, switching the operating state / standby state at a preset time interval, and continuing for a preset time.

[0092] Specifically, in the embodiment of the present application, there is at least one line among multiple lines, and the difference between the protection current and the third current is not greater than the preset difference, which means that there is a risk of line overload on the line. At this time, it is necessary to determine the first charging and discharging strategy in combination with the operating status of the energy storage system.

[0093] If the operating status of N branches is all in the charging state, that is, when the operating status of the lines is all in the charging state, it can be determined that the branch where the first energy storage device is located is also in the charging state, and other energy storage devices in the line are being charged at this time. The probability that the maximum current of the corresponding line exceeds the protection current due to the discharge of the first energy storage device according to the first preset power is lower than the probability that the maximum current of the corresponding line exceeds the protection current due to the simultaneous charging of the first energy storage device and other energy storage devices. In the branch in the charging state, all energy storage devices are in the charging state, and the current flows from the grid side into the energy storage device, that is, the energy storage device is charged by the current provided by the grid.

[0094] Therefore, when it is determined that the branch line where the first energy storage device is located is in a charging state, the first charge-discharge strategy is determined according to the first energy storage device discharging at the first preset power, switching the running state / standby state at a preset time interval, and continuing for a preset time. That is to say, the first charge-discharge strategy at least includes the first energy storage device discharging at the first preset power, switching the running state / standby state at a preset time interval, and continuing for a preset time. In actual applications, more steps and operating parameters may be included, which will not be repeated here.

[0095] If the operating status of N branches are all in the feeding state, it can be determined that the branch where the first energy storage device is located is also in the feeding state, and other energy storage devices in the branch are discharging to other branches or the grid side at this time. Since a large number of energy storage devices are discharging, the first energy storage device is charged according to the second preset power at this time, resulting in the probability that the maximum current of the corresponding line exceeds the protection current will be lower than the probability that the maximum current of the corresponding line exceeds the protection current due to simultaneous discharge with other energy storage devices. In the line in the feeding state, all energy storage devices are in the feeding state, and the current flows from the energy storage device to the grid side, that is, the energy storage device discharges to the grid side.

[0096] Therefore, when it is determined that the branch line where the first energy storage device is located is in the feeding state, the first charging and discharging strategy is determined according to the first energy storage device discharging at the first preset power, switching the running state / standby state at the preset time interval, and continuing for the preset time. That is to say, the first charging and discharging strategy at least includes the first energy storage device charging at the second preset power, switching the running state / standby state at the preset time interval, and continuing for the preset time. In actual applications, it may include more steps and operating parameters, which will not be repeated here.

[0097] It can be seen that in the embodiment of the present application, when the first charge and discharge strategy of the first energy storage device cannot be directly determined by the difference between the protection current of each line and the third current, the first charge and discharge strategy of the first energy storage device is determined by the operating status of multiple lines, thereby ensuring the circuit safety when the first energy storage device operates according to the first charge and discharge strategy.

[0098] In a possible embodiment, the energy storage system further includes a bus, and N branches are connected in series with the bus. If the line state of at least one of the N branches is a charging state, and the line state of at least one of the N branches is a feeding state, the method further includes: obtaining a grid connection state of the energy storage system, the grid connection state includes a grid-connected state or an off-grid state, the energy storage system is connected to the mains network in the grid-connected state, and the energy storage system is not connected to the mains network in the off-grid state; if the grid connection state of the energy storage system is a grid-connected state, then the discharge power of all second energy storage devices in the line whose operating state is a feeding state is adjusted to a third preset power, the first energy storage device is charged with the second preset power, and the operating state / standby state is switched at a preset time interval, and the first charging and discharging strategy is determined for a preset time; if the grid connection state of the energy storage system is an off-grid state, then according to controlling the second energy storage device being charged among the multiple second energy storage devices to stop charging, the first energy storage device is charged with the second preset power, and the operating state / standby state is switched at a preset time interval, and the first charging and discharging strategy is determined for a preset time.

[0099] Specifically, if the operating status of multiple branches is not all in the charging state and not all in the feeding state, that is, it is impossible to determine the specific operating status of the branch where the first energy storage device is located, then it is necessary to further determine the first charging and discharging strategy according to the grid connection status of the energy storage system. The grid connection status includes the grid-connected state or the off-grid state, where the grid-connected state indicates that the energy storage system is connected to the grid side, and the off-grid state indicates that the energy storage system is not connected to the grid side.

[0100] The third preset power here is determined based on the rated power of all energy storage devices. If the grid connection state of the energy storage system is a grid-connected state, it proves that multiple lines in the energy storage system are connected to the grid. At this time, the discharge power of all energy storage devices in the line in the running state is adjusted to the third preset power, so that the discharge power of all energy storage devices is operated according to the lower third preset power, and the first energy storage device is charged with the second preset power, and the running state / standby state is switched at a preset time interval for a preset duration. That is to say, the first charging and discharging strategy at least includes adjusting the discharge power of all energy storage devices in the line in the running state to the third preset power, charging the first energy storage device with the second preset power, switching the running state / standby state at a preset time interval, and continuing for a preset duration. In actual applications, it may include more steps and operating parameters, which are not repeated here. Thereby achieving the purpose of reducing the current pressure on the corresponding line when the first energy storage device operates according to the first charging and discharging strategy.

[0101] If the grid connection state of the energy storage system is off-grid, it proves that the energy storage system is not connected to the grid. In order to reduce the pressure in multiple lines in advance, the energy storage device being charged among the multiple energy storage devices is controlled to stop charging, and the first energy storage device is charged at the second preset power, and the operation state / standby state is switched at the preset time interval for a preset duration, thereby achieving the purpose of reducing the current pressure on the corresponding line when the first energy storage device operates according to the first charging and discharging strategy. That is to say, the first charging and discharging strategy at least includes controlling the energy storage device being charged among the multiple energy storage devices to stop charging, the first energy storage device is charged at the second preset power, and the operation state / standby state is switched at the preset time interval for a preset duration. In actual applications, it may include more steps and schemes, which will not be repeated here.

[0102] It should be noted that the first preset power, the second preset power and the third preset power mentioned in the above application embodiment are specifically determined based on the rated power of the first energy storage device and the energy storage device, and can specifically be 200W, 300W, 500W and the like.

[0103] It can be seen that in the embodiment of the present application, the first charging and discharging strategy of the first energy storage device is determined according to the grid connection state of the energy storage system, and then when the first energy storage device operates according to the first charging and discharging strategy, the current pressure of the N branches is reduced, thereby ensuring the circuit safety when the first energy storage device operates according to the first charging and discharging strategy.

[0104] For example, see Figure 7 , Figure 7 This is a schematic diagram of a first charging and discharging strategy selection provided in an embodiment of the present application, which includes all possible situations in the above embodiments. Figure 7 I will not go into details here.

[0105] S604: The power management device obtains first circuit data of N branches within a preset time period, where the first circuit data includes at least one of current or power.

[0106] S605: The power management device matches the first circuit data of the N branches with the second circuit data corresponding to the first charging and discharging strategy.

[0107] S606: The power management device determines the branch line that successfully matches the first circuit data with the second circuit data as a target branch line for access of the first energy storage device, where the target branch line is one of the N branches.

[0108] For detailed descriptions of steps S601 and S604-S606, please refer to steps S201-S204 and related descriptions, which will not be repeated here.

[0109] In a possible embodiment, after matching the first circuit data of N branches with the second circuit data corresponding to the first charging and discharging strategy, the method further includes: if the first circuit data of the N branches all fail to match the second circuit data, repeatedly executing the steps of obtaining the current system information of the energy storage system and subsequent steps, and recording the number of repeated executions, until the first circuit data of any one of the N branches successfully matches the second circuit data, or the number of repeated executions exceeds a preset number; if the number of repeated executions is greater than the preset number, the method further includes: sending operation control information to the first energy storage device, the operation control information being used to instruct the first energy storage device to operate in a charging mode or a standby mode.

[0110] Specifically, if the current waveforms of multiple lines do not match the target current waveform, that is, the power management device cannot determine the target branch from the N branches, the power management device will re-acquire the current system information of the energy storage system and determine a new first charging and discharging strategy based on the new system information of the energy storage system to re-acquire the current waveforms of multiple lines to try to determine the target branch until any one of the current waveforms of the multiple lines matches the target current waveform, or the number of repeated executions exceeds a preset number of times.

[0111] If the number of repeated executions is greater than the preset number of times, the power management device sends operation control information to the first energy storage device, instructing the first energy storage device to operate according to the second charging and discharging strategy. The second charging and discharging strategy includes operating only in charging mode or standby mode. That is to say, since it is impossible to determine which of the N branches the branch line where the first energy storage device is located is, the first energy storage device can only be instructed to operate in the mode of an electrical appliance, so that the first energy storage device does not operate according to the control of the power management system, but only switches between the charging mode and the standby mode through its own operation logic. In this state, the first energy storage device can be regarded as an ordinary electrical appliance, thereby ensuring the power safety of the energy storage system.

[0112] For example, see Figure 8 , Figure 8 A schematic diagram of a process of repeatedly executing route determination provided in an embodiment of the present application includes steps S801-S801:

[0113] S801: The power management device obtains current system information of the energy storage system, where the system information includes the current third current and protection current of each of the N branches.

[0114] S802: The power management device determines a first charging and discharging strategy according to current system information of the energy storage system.

[0115] S803: The power management device matches the first circuit data of the N branches with the second circuit data corresponding to the first charging and discharging strategy.

[0116] For the related description of steps S801-S803, please refer to the aforementioned steps S201-S204, S601-S606 and related descriptions, which will not be repeated here.

[0117] S804: The power management device determines whether any first circuit data in the current images of the N branches matches the second circuit data.

[0118] Specifically, if any first circuit data in the current images of the N branches matches the second circuit data, the power management device ends determining the target branch from the branches corresponding to at least one first circuit data matching the second circuit data.

[0119] When the first circuit data of the N branches do not match the first circuit data, step S805 is executed.

[0120] S805: The power management device determines whether the number of repeated executions is greater than a preset number.

[0121] Specifically, if the number of repeated executions here is not greater than the preset number of times, the power management device re-acquires the current system information of the energy storage system, and then determines a new first charging and discharging strategy based on the new system information; if the operating status of most of the energy storage devices and electrical appliances in the energy storage system has not changed, the new first charging and discharging strategy may be the same as the previous first charging and discharging strategy.

[0122] After determining the new first charge and discharge strategy, the power management device controls the first energy storage device to operate according to the first charge and discharge strategy again, and obtains the new first circuit data of N branches; determines the target branch connected to the first energy storage device according to the circuit data of multiple lines, and records the number of repetitions. The energy storage device will repeatedly execute the line determination method of the energy storage device according to the above steps until the target branch is determined or the number of repetitions exceeds the preset number. Figure 8 If the number of repetitions in the steps shown in exceeds the preset number, the repeated test will be stopped. The preset number here is specifically 1 time, 2 times, 4 times, etc., which will not be repeated here.

[0123] It can be seen that in the embodiment of the present application, when the first circuit data of N branches all match the second circuit data, the target branch is determined by repeated execution. If the target branch cannot be determined after repeating the preset number of times, the first energy storage device is controlled to operate only in the charging mode or the standby mode, thereby ensuring the safe operation of the energy storage system and improving the stability of the energy storage system.

[0124] By implementing the method in the above-mentioned application embodiment, it can be seen that by controlling the first energy storage device to determine the branch corresponding to the new first energy storage device in the energy storage system according to the first charging and discharging strategy, the problem of being unable to automatically determine the target branch corresponding to the connected energy storage device is solved. The corresponding first charging and discharging strategy is determined through system information, which ensures the circuit safety when the first energy storage device operates according to the first charging and discharging strategy. The current waveforms of multiple lines are generated according to the circuit data of multiple lines, which improves the efficiency and accuracy of determining the target branch. In the case where the target branch cannot be determined, the first energy storage device can also operate only in charging mode or standby mode, which improves the stability of the energy storage system.

[0125] Based on the description of the above configuration method embodiment, the present application also provides a circuit determination device 900 for an energy storage device. The circuit determination device 900 for an energy storage device may be a device running on Figure 1 A computer program (including program code) in a processor shown in FIG. 9A . The circuit determination device 900 of the energy storage device can be applied to Figure 1 The application scenario shown in the figure is executed Figure 2 See the method shown in Fig. 9 , Fig. 9A schematic diagram of a circuit determination device for an energy storage device provided in an embodiment of the present application is provided. The circuit determination device 900 for an energy storage device includes:

[0126] The sending unit 901 is used to send test control information to the first energy storage device after receiving the registration information sent by the first energy storage device; wherein the first energy storage device is an energy storage device that is newly connected to the energy storage system and is not in operation, and the test control information is used to instruct the first energy storage device to operate according to the first charging and discharging strategy within a preset time period;

[0127] An acquisition unit 902 is used to acquire first circuit data of N branches within a preset time period, where the first circuit data includes at least one of current or power;

[0128] A matching unit 903, configured to match the first circuit data of the N branches with the second circuit data corresponding to the first charging and discharging strategy;

[0129] The determination unit 904 is configured to determine the branch line on which the first circuit data and the second circuit data are successfully matched as a target branch line for access of the first energy storage device, wherein the target branch line is one of the N branches.

[0130] In a possible embodiment, before sending the test control information to the first energy storage device, the acquisition unit 902 is further specifically used to: obtain the current system information of the energy storage system, the system information including the current third current and protection current of each of the N branches, the protection current being the maximum current value that the corresponding branch can carry; if the difference between the protection current of each of the N branches minus the third current is greater than the preset difference, then according to the first energy storage device discharging at the first preset power, switching the operating state / standby state at a preset time interval, and continuing for a preset time to determine the first charging and discharging strategy, so that when the first energy storage device operates according to the first charging and discharging strategy, the second and third current values ​​of the N branches do not exceed the corresponding protection current.

[0131] In a possible embodiment, at least one of the N branches includes a second energy storage device, and the second energy storage device is an energy storage device in an operating state; if the difference between the protection current of any branch of the N branches and the third current is not greater than a preset difference, the determination unit 904 is further specifically used to: determine the line status of the N branches, the line status includes a charging state or a feeding state, all the second energy storage devices on the branch in the charging state are in the charging state, and all the second energy storage devices on the branch in the feeding state are in the feeding state; if the line status of the N branches is all in the charging state, then the first charging and discharging strategy is determined according to the first energy storage device discharging with a first preset power, switching the operating state / standby state at a preset time interval, and continuing for a preset time; if the line status of the N branches is all in the feeding state, then the first charging and discharging strategy is determined according to the first energy storage device charging with a second preset power, switching the operating state / standby state at a preset time interval, and continuing for a preset time.

[0132] In a possible embodiment, the energy storage system further includes a bus, and N branches are connected in series with the bus. If the line state of at least one of the N branches is a charging state, and the line state of at least one of the N branches is a feeding state, the acquisition unit 902 is further specifically used to: acquire a grid connection state of the energy storage system, the grid connection state includes a grid-connected state or an off-grid state, in which the energy storage system is connected to the mains network, and in which the energy storage system is not connected to the mains network; if the grid connection state of the energy storage system is a grid-connected state, then the discharge power of all second energy storage devices in the line whose operating state is a feeding state is adjusted to a third preset power, the first energy storage device is charged with the second preset power, and the operating state / standby state is switched at a preset time interval, and the first charging and discharging strategy is determined for a preset time; if the grid connection state of the energy storage system is an off-grid state, then the second energy storage device being charged among the multiple second energy storage devices is controlled to stop charging, the first energy storage device is charged with the second preset power, and the operating state / standby state is switched at a preset time interval, and the first charging and discharging strategy is determined for a preset time.

[0133] In a possible embodiment, the first circuit data includes a first current, and the second circuit data includes a second current; in terms of matching the first circuit data of N branches with the second circuit data corresponding to the first charging and discharging strategy, the matching unit 903 is also specifically used to: generate a second current waveform based on the second current; generate a first current waveform of the N branches based on the first current in the first circuit data of the N branches; match the first current waveforms of the N branches with the second current waveforms, respectively; and determine the matching results of the first current waveforms and the second current waveforms of the N branches as the matching results of the first circuit data and the second circuit data of the N branches.

[0134] In combination with the first aspect, in a possible embodiment, after matching the first circuit data of N branches with the second circuit data corresponding to the first charging and discharging strategy, the acquisition unit 902 is further specifically used to: if the first circuit data of the N branches all fail to match the second circuit data, then repeatedly execute the acquisition of the current system information of the energy storage system and subsequent steps, and record the number of repeated executions until the first circuit data of any one of the N branches successfully matches the second circuit data, or the number of repeated executions exceeds a preset number; if the number of repeated executions is greater than the preset number, the method also includes: sending operation control information to the first energy storage device, the operation control information is used to instruct the first energy storage device to operate in charging mode or standby mode.

[0135] Based on the description of the above method embodiment and device embodiment, please refer to Fig.10 , Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Fig.10 The electronic device 1000 shown (the electronic device 1000 may be a computer device) includes a memory 1001, a processor 1002, a communication interface 1003 and a communication bus 1004. The memory 1001, the processor 1002 and the communication interface 1003 are connected to each other through the communication bus 1004.

[0136] The memory 1001 may be a read-only memory (ROM), a static storage device, a dynamic storage device or a random access memory (RAM).

[0137] The memory 1001 can store programs. When the program stored in the memory 1001 is executed by the processor 1002, the processor 1002 and the communication interface 1003 are used to execute the various steps of the line determination method of the energy storage device in the embodiment of the present application.

[0138] The processor 1002 can adopt a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), a graphics processing unit (GPU) or one or more integrated circuits to execute relevant programs to implement the functions required to be performed by the units in the electronic device 1000 of the embodiment of the present application, or to execute the line determination method of the energy storage device of the method embodiment of the present application.

[0139] The processor 1002 may also be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the line determination method of the energy storage device of the present application may be completed by an integrated logic circuit of hardware or software instructions in the processor 1002. The above-mentioned processor 1002 may also be a general-purpose processor, a digital signal processor (Digital Signal Processing, DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in a decoding processor. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1001, and the processor 1002 reads the information in the memory 1001, and combines its hardware to complete the functions required to be performed by the units included in the electronic device 1000 of the embodiment of the present application, or executes the line determination method of the energy storage device of the method embodiment of the present application.

[0140] The communication interface 1003 uses a transceiver device such as, but not limited to, a transceiver to implement communication between the electronic device 1000 and other devices or a communication network. For example, data can be acquired through the communication interface 1003 .

[0141] The communication bus 1004 may include a path for transmitting information between various components of the electronic device 1000 (eg, the memory 1001 , the processor 1002 , and the communication interface 1003 ).

[0142] It should be noted that although Fig.10 The electronic device 1000 shown only shows the memory 1001, the processor 1002, and the communication interface 1003. However, in the specific implementation process, those skilled in the art should understand that the electronic device 1000 also includes other devices necessary for normal operation. At the same time, according to specific needs, those skilled in the art should understand that the electronic device 1000 may also include hardware devices for implementing other additional functions. In addition, those skilled in the art should understand that the electronic device 1000 may also only include the devices necessary for implementing the embodiments of the present application, and does not necessarily include Fig.10 All devices shown in .

[0143] An embodiment of the present application further provides a chip, which includes a processor and a data interface. The processor reads instructions stored in a memory through the data interface to implement the circuit determination method of the energy storage device.

[0144] Optionally, as an implementation method, the chip may further include a memory, in which instructions are stored, and the processor is used to execute the instructions stored in the memory. When the instructions are executed, the processor is used to execute the line determination method of the energy storage device.

[0145] An embodiment of the present application also provides a computer-readable storage medium, which stores instructions. When the computer-readable storage medium is executed on a computer or a processor, the computer or the processor executes one or more steps in any of the above methods.

[0146] The embodiment of the present application further provides a computer program product including instructions. When the computer program product is executed on a computer or a processor, the computer or the processor executes one or more steps in any of the above methods.

[0147] Those skilled in the art will appreciate that the functions described in conjunction with the various illustrative logic blocks, modules, and algorithm steps disclosed herein can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions described in the various illustrative logic blocks, modules, and steps can be stored or transmitted as one or more instructions or codes on a computer-readable medium and executed by a hardware-based processing unit. Computer-readable media may include computer-readable storage media, which corresponds to tangible media, such as data storage media, or includes any media (e.g., based on a communication protocol) that facilitates the transfer of a computer program from one place to another. In this manner, computer-readable media may generally correspond to (1) non-temporary tangible computer-readable storage media, or (2) communication media, such as signals or carrier waves. Data storage media may be any available media that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and / or data structures for implementing the techniques described in this application. A computer program product may include computer-readable media.

[0148] As an example and not limitation, such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage, flash memory, or any other medium that can be used to store the desired program code in the form of instructions or data structures and can be accessed by a computer. Also, any connection is properly referred to as a computer-readable medium. For example, if instructions are transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of media. However, it should be understood that the computer-readable storage media and data storage media do not include connections, carrier waves, signals or other temporary media, but are actually directed to non-temporary tangible storage media. As used herein, disks and optical disks include compact disks (CDs), laser optical disks, optical optical disks, digital versatile disks (DVDs), and Blu-ray disks, where disks typically reproduce data magnetically, while optical disks reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0149] Instructions may be executed by one or more processors, such as one or more digital signal processors (DSPs), general purpose microprocessors, application specific integrated circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuits. Thus, the term "processor" as used herein may refer to any of the aforementioned structures or any other structures suitable for implementing the techniques described herein. Additionally, in some aspects, the functions described by the various illustrative logic blocks, modules, and steps described herein may be provided within dedicated hardware and / or software modules configured for encoding and decoding, or incorporated in a combined codec. Moreover, the techniques may be fully implemented in one or more circuits or logic elements.

[0150] The techniques of the present application may be implemented in a variety of devices or apparatuses, including a wireless handset, an integrated circuit (IC), or a set of ICs (e.g., a chipset). Various components, modules, or units are described in this application to emphasize functional aspects of devices for performing the disclosed techniques, but do not necessarily need to be implemented by different hardware units. In fact, as described above, the various units may be combined in an encoded hardware unit in conjunction with appropriate software and / or firmware, or provided by interoperating hardware units (including one or more processors as described above).

[0151] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the specific descriptions of the corresponding steps in the aforementioned method embodiments, and will not be repeated here.

[0152] It should be understood that in the description of the present application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; wherein A and B can be singular or plural. Also, in the description of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, wherein a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that the words "first", "second", etc. do not limit the quantity and execution order, and the words "first", "second", etc. do not limit them to be necessarily different. Meanwhile, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner for ease of understanding.

[0153] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the division of the unit is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. The mutual coupling, direct coupling, or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0154] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0155] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integrations. The available medium may be a read-only memory (ROM), or a random access memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a tape, a disk, or an optical medium, such as a digital versatile disc (DVD), or a semiconductor medium, such as a solid state disk (SSD), etc.

[0156] The above is only a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto, and any changes or replacements within the technical scope disclosed in the embodiment of the present application should be included in the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiment of the present application should be based on the protection scope of the claims.

[0157] The device embodiments described above are merely illustrative, wherein the units and modules described as separate components may or may not be physically separated. In addition, some or all of the units and modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those of ordinary skill in the art may understand and implement the present invention without creative effort.

[0158] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for determining a line of an energy storage device, characterized in that: An electric energy management device applied to an energy storage system, wherein the energy storage system further comprises N branches, wherein the N branches are connected in parallel, and the method comprises: After receiving the registration information sent by the first energy storage device, sending test control information to the first energy storage device; wherein the first energy storage device is an energy storage device newly connected to the energy storage system and is not in operation, and the test control information is used to instruct the first energy storage device to operate according to the first charging and discharging strategy within a preset time period; Acquire first circuit data of the N branches within the preset time period, where the first circuit data includes at least one of current or power; Matching the first circuit data of the N branches with the second circuit data corresponding to the first charge and discharge strategy; The branch line on which the first circuit data and the second circuit data are successfully matched is determined as a target branch line to which the first energy storage device is connected, and the target branch line is one of the N branches.

2. The method according to claim 1, characterized in that Before sending the test control information to the first energy storage device, the method further includes: Acquire current system information of the energy storage system, the system information including the current third current and protection current of each branch line of the N branches, the protection current being the maximum current value that the corresponding branch line can carry; If the difference between the protection current of each branch of the N branches and the third current is greater than the preset difference, the first charging and discharging strategy is determined according to the first energy storage device discharging at the first preset power, switching the running state / standby state at the preset time interval, and continuing for a preset time, so that when the first energy storage device operates according to the first charging and discharging strategy, the second and third current values ​​of the N branches do not exceed the corresponding protection current.

3. The method according to claim 2, characterized in that At least one of the N branches includes a second energy storage device, and the second energy storage device is an energy storage device in operation; If the difference between the protection current of any branch line of the N branches and the third current is not greater than the preset difference, the method further includes: Determine the line status of the N branches, the line status includes a charging state or a feeding state, all the second energy storage devices on the branch in the charging state are in the charging state, and all the second energy storage devices on the branch in the feeding state are in the feeding state; If the line states of the N branches are all in the charging state, the first charging and discharging strategy is determined according to the first energy storage device discharging at the first preset power, switching the running state / standby state at the preset time interval, and continuing for a preset time; If the line states of the N branches are all in the feeding state, the first charging and discharging strategy is determined according to the first energy storage device being charged with a second preset power, switching between the running state and the standby state at a preset time interval, and continuing for a preset time period.

4. The method according to claim 3, characterized in that The energy storage system further includes a bus, the N branches are connected in series with the bus, and if the line state of at least one of the N branches is a charging state, and the line state of at least one of the N branches is a feeding state, the method further includes: Acquire the grid connection status of the energy storage system, the grid connection status includes a grid-connected state or an off-grid state, in which the energy storage system is connected to the mains power network in the grid-connected state, and in which the energy storage system is not connected to the mains power network in the off-grid state; If the grid connection state of the energy storage system is a grid-connected state, the discharge power of all second energy storage devices in the line whose operating state is a feeding state is adjusted to a third preset power, the first energy storage device is charged with the second preset power, and the operating state / standby state is switched at a preset time interval, and the first charging and discharging strategy is determined for a preset duration; If the grid connection state of the energy storage system is an off-grid state, the second energy storage device that is being charged among the multiple second energy storage devices is controlled to stop charging, the first energy storage device is charged with a second preset power, and the running state / standby state is switched at a preset time interval, and the first charging and discharging strategy is determined by continuing for a preset time.

5. The method according to any one of claims 1 to 4, characterized in that: The first circuit data includes a first current, and the second circuit data includes a second current; and matching the first circuit data of the N branches with the second circuit data corresponding to the first charge and discharge strategy includes: generating a second current waveform according to the second current; generating a first current waveform of the N branches according to the first current in the first circuit data of the N branches; Matching the first current waveforms of the N branches with the second current waveforms respectively; The matching result of the first current waveform of the N branches and the second current waveform is determined as the matching result of the first circuit data of the N branches and the second circuit data.

6. The method according to any one of claims 2 to 5, characterized in that: After matching the first circuit data of the N branches with the second circuit data corresponding to the first charging and discharging strategy, the method further includes: If the first circuit data of the N branches fail to match the second circuit data, the step of obtaining the current system information of the energy storage system and subsequent steps are repeated, and the number of repeated executions is recorded until the first circuit data of any one of the N branches successfully matches the second circuit data, or the number of repeated executions exceeds a preset number; If the number of repeated executions is greater than a preset number of times, the method further includes: Operation control information is sent to the first energy storage device, where the operation control information is used to instruct the first energy storage device to operate in a charging mode or a standby mode.

7. A circuit determination device for energy storage equipment, characterized in that: The device is used to execute a line determination method for an energy storage device, the device belongs to an energy storage system, the energy storage system further includes N branches, the N branches are connected in parallel, and the device includes: A sending unit, configured to send test control information to the first energy storage device after receiving registration information sent by the first energy storage device; wherein the first energy storage device is an energy storage device newly connected to the energy storage system and is not in operation, and the test control information is used to instruct the first energy storage device to operate according to a first charging and discharging strategy within a preset time period; an acquisition unit, configured to acquire first circuit data of the N branches within the preset time period, wherein the first circuit data includes at least one of current or power; a matching unit, configured to match the first circuit data of the N branches with the second circuit data corresponding to the first charging and discharging strategy; A determination unit is used to determine a branch line that successfully matches the first circuit data with the second circuit data as a target branch line for access of the first energy storage device, wherein the target branch line is one of the N branches.

8. A computer device, characterized in that: The method comprises a processor, a memory, a communication interface, and one or more computer programs, wherein the one or more computer programs are stored in the memory and configured to be executed by the processor, and the computer programs include instructions for executing the steps in the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a processor to execute the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, 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.

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