Rectifier standby energy storage all-in-one machine control method, system, device and storage medium

Abstract

The embodiment of the specification provides a rectification standby power energy storage integrated machine control method, system, device and storage medium, the method comprises: determining the target voltage interval of the energy storage equipment according to the power utilization equipment of the energy storage equipment and the operation parameter of the power utilization equipment; the energy storage equipment is based on the battery management system operation, including a plurality of battery packs; in response to the actual voltage of the energy storage equipment not being in the target voltage interval: obtain the to-be-inspected battery pack set; according to the voltage fluctuation information of the energy storage equipment at a plurality of historical time points in a preset historical period, the to-be-inspected battery pack set and the discharge information of the plurality of battery packs at the plurality of historical time points, determine the target battery pack set, the target battery pack set includes the to-be-accessed battery pack and the to-be-exited battery pack; control the to-be-accessed battery pack to access the battery management system; isolate the to-be-exited battery pack, control the to-be-exited battery pack to exit the battery management system, and send notification information to the interaction screen.

Description

Technical Field

[0001] This specification relates to the field of power supply technology, and in particular to a control method, system, device and storage medium for an integrated rectifier, backup power and energy storage unit. Background Technology

[0002] Energy storage devices play a crucial role in modern energy systems. For example, they can balance electricity supply and demand and improve the utilization rate of renewable energy. Large-scale energy storage devices typically consist of multiple battery packs. Although energy storage devices control current input and output through rectifiers, each battery pack may actually be in different charging, discharging, or non-operating states. Monitoring the battery packs is a vital part of ensuring the safe operation of energy storage devices. Traditional battery monitoring systems treat the battery pack as a whole, monitoring temperature, current, etc., and suspending operation when a problem is detected. Since not all system alarms are sufficient to threaten the overall operation of the energy storage device, the aforementioned monitoring can affect the operating efficiency of the energy storage device.

[0003] Therefore, it is necessary to provide a control method for an integrated rectifier, backup power, and energy storage unit to monitor a single battery pack, thereby ensuring the efficient and reliable operation of the energy storage device. Summary of the Invention

[0004] This specification provides one or more embodiments of a rectifier-backup-energy storage integrated control method, comprising: determining a target voltage range for the energy storage device based on the power consumption equipment and the operating parameters of the power consumption equipment; the energy storage device operates based on a battery management system and includes multiple battery packs; in response to the actual voltage of the energy storage device not being within the target voltage range: acquiring a set of battery packs to be tested; determining a target set of battery packs based on voltage fluctuation information of the energy storage device at multiple historical moments within a preset historical period, the set of battery packs to be tested, and the discharge information of the multiple battery packs at the multiple historical moments, the target set of battery packs including battery packs to be connected and battery packs to be disconnected; controlling the battery packs to be connected to connect to the battery management system; isolating the battery packs to be disconnected, controlling the battery packs to be disconnected to disconnect from the battery management system, and sending notification information to an interactive screen.

[0005] One embodiment of this specification provides a rectifier-backup-energy storage integrated control system. The system includes: a first determining module configured to determine a target voltage range for the energy storage device based on the power consumption equipment and the operating parameters of the power consumption equipment; the energy storage device operates based on a battery management system and includes multiple battery packs; an acquiring module configured to acquire a set of battery packs to be tested in response to the actual voltage of the energy storage device not being within the target voltage range; a second determining module configured to determine a target battery pack set based on voltage fluctuation information of the energy storage device at multiple historical moments within a preset historical period, the set of battery packs to be tested, and the discharge information of the multiple battery packs at the multiple historical moments, the target battery pack set including battery packs to be connected and battery packs to be disconnected; an access module configured to control the battery packs to be connected to access the battery management system; and a disconnect module configured to isolate the battery packs to be disconnected, control the battery packs to be disconnected to disconnect from the battery management system, and send notification information to an interactive screen.

[0006] This specification provides one or more embodiments of a rectifier-backup-energy storage integrated machine control device, the device including at least one processor and at least one memory; the at least one memory is used to store computer instructions; the at least one processor is used to execute at least a portion of the computer instructions to implement the rectifier-backup-energy storage integrated machine control method.

[0007] This specification provides one or more embodiments of a computer-readable storage medium that stores computer instructions that, when executed by a processor, implement a rectifier-backup-energy storage integrated machine control method. Attached Figure Description

[0008] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0009] Figure 1 This is an exemplary block diagram of a rectifier-backup-energy-storage integrated control system according to some embodiments of this specification;

[0010] Figure 2 This is an exemplary flowchart of a rectifier-backup-energy-storage integrated control method according to some embodiments of this specification;

[0011] Figure 3 This is an exemplary flowchart illustrating the determination of a battery pack to be decommissioned according to some embodiments of this specification;

[0012] Figure 4 This is an exemplary schematic diagram illustrating the determination of a set of battery packs to be tested according to some embodiments of this specification. Detailed Implementation

[0013] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0014] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0015] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0016] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0017] Traditional battery monitoring systems monitor multiple battery packs as a whole, and the system alarms only indicate that a problem exists, but they do not further analyze whether this problem will affect the operation of the energy storage device. Suspending the operation of the energy storage device simply because a problem exists may result in unnecessary waste of manpower, time, and resources.

[0018] Therefore, in some embodiments of this specification, an improved control method for an integrated rectifier-backup energy storage unit is provided, which monitors multiple battery packs separately. When a single battery pack has a problem, only that single battery pack is temporarily disconnected, without affecting the operation of other battery packs, thus improving the operating efficiency of the energy storage device.

[0019] Figure 1 This is an exemplary block diagram of a rectifier-backup-energy storage integrated control system according to some embodiments of this specification.

[0020] In some embodiments, such as Figure 1 As shown, the integrated rectifier, backup power, and energy storage control system 100 may include a first determining module 110, an acquiring module 120, a second determining module 130, an access module 140, and an exit module 150.

[0021] The first determining module 110 is a module used to determine a target voltage range. In some embodiments, the first determining module 110 is configured to determine the target voltage range of the energy storage device based on the electrical devices of the energy storage device and the operating parameters of the electrical devices; the energy storage device operates based on a battery management system and includes multiple battery packs.

[0022] Energy storage equipment is a device that can store electrical energy, thermal energy, or other forms of energy and release them when needed.

[0023] Electrical equipment refers to equipment that relies on energy storage devices to provide electricity, such as compressors, welding machines, and industrial furnaces used in industry.

[0024] A battery management system is a system used to manage multiple battery packs in an energy storage device.

[0025] In some embodiments, the energy storage device includes multiple battery packs.

[0026] A battery pack is an energy storage unit in an energy storage device, consisting of multiple battery cells connected together in a specific way to form a larger capacity, higher voltage, or higher power. These multiple battery cells include lithium-ion batteries, lead-acid batteries, nickel-metal hydride batteries, etc.; the specific connection methods include series, parallel, or hybrid connections.

[0027] The acquisition module 120 refers to a module used to acquire a set of battery packs to be tested. In some embodiments, the acquisition module 120 is configured to acquire the set of battery packs to be tested in response to the actual voltage of the energy storage device not being within the target voltage range.

[0028] The set of battery packs to be tested refers to the collection of battery packs to be tested.

[0029] In some embodiments, the acquisition module 120 is further configured to: determine a set of battery packs to be tested based on multiple discharge equalization values ​​of multiple battery packs within a preset period every preset period.

[0030] The second determining module 130 is a module used to determine a target battery pack set. In some embodiments, the second determining module 130 is configured to determine a target battery pack set based on voltage fluctuation information of the energy storage device at multiple historical moments within a preset historical period, the battery pack set to be tested, and discharge information of multiple battery packs at multiple historical moments. The target battery pack set includes battery packs to be added and battery packs to be removed.

[0031] The target battery pack set refers to the battery pack combination that is ultimately determined to be added or removed in the battery management system after analysis and optimization.

[0032] Battery packs to be connected refer to battery packs that are not currently running in the battery management system, but which need to be connected to the battery management system based on analysis. For example, undamaged battery packs.

[0033] Battery packs awaiting retirement refer to those currently running in the battery management system but which, based on analysis, need to be removed from the system. Examples include damaged battery packs.

[0034] In some embodiments, the second determining module 130 is further configured to: acquire historical discharge data of the energy storage device within a preset historical period; determine a first duration ratio of the energy storage device in a single historical discharge process based on the historical discharge data; determine the discharge balance value of a single battery pack within the preset historical period based on the first duration ratio of multiple historical discharge processes and the corresponding battery pack access data; and for a single battery pack, in response to the discharge balance value of the single battery pack being lower than a first preset threshold, designate the single battery pack as a battery pack to be decommissioned.

[0035] In some embodiments, the second determining module 130 is further configured to: determine the discharge balance value of multiple battery packs based on the first duration ratio in multiple historical discharge processes, the corresponding battery pack access data, and the discharge information of multiple battery packs at multiple historical moments, using a discharge model, wherein the discharge model is a machine learning model.

[0036] Access module 140 refers to a module used to access the battery pack to be accessed. In some embodiments, access module 140 is configured to control the battery pack to be accessed to access the battery management system.

[0037] The exit module 150 refers to a module used to exit the battery pack to be exited. In some embodiments, the exit module 150 is configured to isolate the battery pack to be exited, control the battery pack to be exited to exit the battery management system, and send notification information to the interactive screen.

[0038] An interactive screen refers to a screen on an energy storage device used for interaction with users. Users are those who use or maintain the energy storage device.

[0039] In some embodiments, the integrated rectifier, backup power, and energy storage control system may further include a processor, on which all or part of the aforementioned modules may be integrated. The processor can process and execute one or more functions described in this application. In some embodiments, the processor may include one or more sub-processors (e.g., a single-core processing device or a multi-core multi-core processing device). By way of example only, the processor may include a central processing unit (CPU), a microprocessor, or any combination thereof.

[0040] In some embodiments, the integrated rectifier-backup-energy-storage control system may further include a storage device. The storage device can be used to store data and / or instructions. The storage device may include one or more storage components, each of which may be a separate device or part of another device. In some embodiments, the storage device may include random access memory (RAM), etc. In some embodiments, the storage device may also be integrated onto a processor.

[0041] For more information on the first determination module 110, the acquisition module 120, the second determination module 130, the access module 140, and the exit module 150, please refer to [link / reference needed]. Figure 2-4 The corresponding description.

[0042] It should be noted that the above description of the integrated rectifier-backup energy storage control system and its modules is for convenience only and should not be construed as limiting this specification to the embodiments described. It is understood that those skilled in the art, after understanding the principles of the system, may arbitrarily combine the various modules or construct subsystems connected to other modules without departing from these principles. In some embodiments, Figure 1 The first determining module 110, the acquiring module 120, the second determining module 130, the access module 140, and the exit module 150 disclosed herein can be different modules within a single system, or a single module can implement the functions of two or more of the aforementioned modules. For example, the modules can share a single storage module, or each module can have its own separate storage module. Such variations are all within the scope of protection of this specification.

[0043] Figure 2 This is an exemplary flowchart of a control method for an integrated rectifier, backup power, and energy storage unit according to some embodiments of this specification. In some embodiments, such as Figure 2 As shown, process 200 includes the following steps. Process 200 can be executed by a processor.

[0044] Step 210: Determine the target voltage range of the energy storage device based on the electrical equipment and its operating parameters.

[0045] For more information on energy storage devices and electrical appliances, please refer to [link / reference]. Figure 1 The corresponding description.

[0046] Operating parameters are data used to characterize the operating features of electrical equipment. For example, operating parameters include the operating power and operating duration of the equipment.

[0047] In some embodiments, operating parameters can be obtained by acquiring user input or by any other feasible method.

[0048] The target voltage range refers to the reasonable voltage range during the discharge of energy storage devices.

[0049] In some embodiments, the processor can obtain the target voltage range in various ways. For example, the processor can determine the target voltage range by querying a first preset table based on the electrical equipment and its operating parameters. The first preset table is a table that contains the correspondence between electrical equipment, operating parameters, and target voltage ranges. In some embodiments, for a certain electrical equipment, the processor can statistically analyze historical operating parameters and their corresponding historical target voltage ranges from historical data, add all historical operating parameters to the first preset table, and for each historical operating parameter, add the historical target voltage range that appears most frequently to the first preset table.

[0050] Step 220, in response to the actual voltage of the energy storage device not being within the target voltage range: Obtain the set of battery packs to be tested. For more information on the set of battery packs to be tested, see [link to relevant documentation]. Figure 1 The corresponding description.

[0051] In some embodiments, the processor can obtain the set of battery packs to be inspected in various ways. For example, the processor can preset the time when each battery pack needs to be repaired / inspected, and obtain all battery packs that need to be repaired / inspected at the current time as the set of battery packs to be inspected.

[0052] In some embodiments, the processor can also determine the set of battery packs to be tested based on multiple discharge equalization values ​​of multiple battery packs within a preset cycle. For more information on this section, please refer to [link to relevant documentation]. Figure 4 And its corresponding description.

[0053] Step 230: In some embodiments, a target battery pack set is determined based on voltage fluctuation information of the energy storage device at multiple historical moments within a preset historical period, the set of battery packs to be tested, and discharge information of multiple battery packs at multiple historical moments. More information about the target battery pack set can be found in [link to relevant documentation]. Figure 1 The corresponding description.

[0054] A preset historical period refers to a time interval ending at the current point in time. The duration of a preset historical period can be predetermined, such as the past hour. A preset historical period includes multiple historical moments, which are the times when the voltage of the energy storage device fluctuated within the preset historical period.

[0055] Voltage fluctuation information is data that characterizes the features of voltage fluctuations. For example, voltage fluctuation information includes the voltage before the fluctuation and the voltage after the fluctuation.

[0056] Discharge information is data that characterizes the discharge characteristics of multiple battery packs when the voltage of an energy storage device fluctuates. For example, discharge information includes battery voltage, battery current, and battery temperature.

[0057] In some embodiments, the processor can obtain voltage fluctuation information at multiple historical moments by querying historical data.

[0058] In some embodiments, the processor can obtain discharge information of multiple battery packs at multiple historical moments using historical data. For example, the processor can use the average of historical battery voltage, historical battery current, and historical battery temperature from multiple historical discharges as the discharge information for each battery pack.

[0059] In some embodiments, the target battery pack set includes battery packs to be added and battery packs to be removed.

[0060] In some embodiments, the processor can determine the target battery pack set through various methods based on voltage fluctuation information of the energy storage device at multiple historical moments within a preset historical period, the set of battery packs to be inspected, and discharge information of multiple battery packs at multiple historical moments. As an example only, the processor can first obtain the number N of accessible battery packs, and then obtain the battery packs to be accessed and the battery packs to be removed, thereby determining the target battery pack set. Here, accessible battery packs refer to battery packs that can be accessed by the battery management system and are either repaired or undamaged; N is an integer. The battery packs to be accessed are all or some of the battery packs randomly obtained from the accessible battery packs.

[0061] In some embodiments, the processor can determine the battery packs to be decommissioned in a variety of ways. For example, the processor can determine the battery packs that meet a first preset condition as the battery packs to be decommissioned; if the number of battery packs to be decommissioned is less than N, the processor can determine the battery packs with abnormal discharge information at multiple historical moments as the battery packs to be decommissioned, until the number of battery packs to be decommissioned is equal to N or no battery pack with abnormal discharge information is working in the battery management system, and record the battery pack M to be decommissioned at this time.

[0062] The first preset condition refers to the criteria for determining whether a battery pack can be removed from the battery management system. These conditions include a continuously decreasing battery voltage, a battery voltage of 0, and a battery pack with a significantly lower current than other series-connected battery packs. A continuously decreasing battery voltage or a battery voltage of 0 will cause a decrease in the voltage of the energy storage device; a significantly lower current than other battery packs indicates that the internal resistance of that battery pack may increase, leading to an increase in the battery pack's voltage. In both of these cases, the corresponding battery pack needs to be removed from the battery management system. Here, M is an integer, M≤N. A series-connected battery pack refers to a battery pack composed of multiple battery cells connected in series.

[0063] Anomalies in discharge information refer to sudden changes or significant drops in battery voltage, current, and / or temperature compared to other battery packs. A sudden change refers to a rapid rise or fall within a short period of time.

[0064] In some embodiments, the processor can determine the performance index of multiple battery packs based on charging information of multiple battery packs at multiple historical moments; and adjust the battery packs to be decommissioned based on the performance index.

[0065] Charging information is data that characterizes the charging characteristics of multiple battery packs when the voltage of an energy storage device fluctuates. For example, charging information includes charging duration, charging amount, and charging temperature.

[0066] In some embodiments, the processor can obtain charging information from historical data of each battery pack. For example, the processor can use the average of historical charging duration, historical charging amount, and historical charging temperature from multiple historical charging cycles as the charging information for each battery pack.

[0067] The performance index refers to data that represents battery performance.

[0068] In some embodiments, the processor can determine the performance index of multiple battery packs using statistical methods based on charging information from multiple historical moments. An exemplary statistical method includes: weighted summation of charging duration, charging amount, and charging temperature, with the weighted sum serving as the performance index. The weights of each weighting term can be set by system default; and the weighting coefficients for charging duration and charging temperature are negative.

[0069] In some embodiments, if the number of battery packs to be decommissioned is less than N, the processor adds battery packs with performance indices lower than a second preset threshold to the list of battery packs to be decommissioned, until the number of battery packs to be decommissioned is equal to N or the performance indices of all currently operating battery packs are greater than or equal to the second preset threshold. The second preset threshold is a predetermined critical value used to determine the performance index of the battery packs to be decommissioned.

[0070] The second preset threshold can be obtained in several ways. For example, it can be preset by staff based on experience.

[0071] In some embodiments, the second preset threshold is related to the first duration proportion of the energy storage device. By way of example only, the larger the first duration proportion of the energy storage device, the smaller the second preset threshold.

[0072] The first duration proportion refers to the proportion of time that the energy storage device spends within the target voltage range. For details on determining the first duration proportion, please refer to [link to relevant documentation]. Figure 3 The corresponding description in [the document / reference].

[0073] The larger the initial duration of the energy storage device, the better the overall performance of each battery pack in the device, allowing even slightly less powerful battery packs to operate. In some embodiments of this specification, by calculating a performance index and adjusting the battery packs to be decommissioned based on that index, the determination of the decommissioned battery packs can be more accurate, improving the operating efficiency of the energy storage device.

[0074] In some embodiments, the processor can determine the battery packs to be connected in a variety of ways. For example, the processor can randomly select M battery packs from N accessible battery packs as the battery packs to be connected.

[0075] In some embodiments, the processor may also designate a single battery pack as a battery pack to be decommissioned in response to a discharge equalization value of a single battery pack falling below a first preset threshold. More information on this section can be found at [link to relevant documentation]. Figure 3 The corresponding description in [the document / reference].

[0076] In some embodiments, the processor can adjust the number of battery packs to be connected based on the discharge equalization value of the multiple battery packs. For more information on this section, please refer to [link to relevant documentation]. Figure 3 The corresponding description.

[0077] Step 240: Control the battery pack to be connected to the battery management system.

[0078] Step 250: Isolate the battery pack to be decommissioned, control the battery pack to exit the battery management system, and send a notification message to the interactive screen. For more information about the interactive screen, please refer to the corresponding description in the figure.

[0079] In some embodiments, the processor can first check parameters such as voltage, current, and temperature of the battery pack to be decommissioned to ensure it is in a safe state; then, it performs equalization on the battery pack to ensure that the voltage of each individual cell is consistent; next, it closes the contactor or triggers the fuse to disconnect the battery pack from the battery management system; finally, it sends a notification message to the interactive screen. The equalization process can include various implementation methods, such as passive equalization and active equalization. A safe state refers to the stable state of the battery pack before it is isolated or decommissioned from the battery management system, meeting a series of safety and performance conditions. For example, a safe state includes voltage, current, and temperature being within safe ranges. The safe range is the range allowed by the design of the energy storage device.

[0080] A contactor is an electromagnetic switch used to control the connection and disconnection of the circuit between the battery pack and the battery management system. A fuse is an overcurrent protection device that melts when the current in the circuit exceeds a set value, thereby cutting off the circuit and preventing damage to the battery pack or battery management system due to overcurrent. The contactor can be installed at the positive or negative output terminal of the battery pack, located between the battery pack and the external circuit; the fuse can be installed in the output circuit of the battery pack, possibly near the contactor or between the positive and negative terminals of the battery pack.

[0081] Notification messages refer to information displayed on the interactive screen related to the battery pack. For example, notification messages may include notifications such as "Battery pack A is deactivated" or "Battery pack B is connected."

[0082] In some embodiments of this specification, determining the target voltage range based on the electrical equipment allows for more targeted setup of the energy storage device; by determining the target battery pack set, different battery packs can be managed independently, and the connection and disconnection of battery packs can be controlled, thereby improving the operating efficiency of the energy storage device.

[0083] Figure 3 This is an exemplary flowchart illustrating the determination of a battery pack to be decommissioned according to some embodiments of this specification. In some embodiments, such as Figure 3 As shown, process 300 includes the following steps. Process 300 can be executed by the second determining module 130 or a processor.

[0084] Step 310: Obtain historical discharge data of the energy storage device within a preset historical time period. For more information on preset historical time periods, please refer to [link to relevant documentation]. Figure 2 The corresponding description.

[0085] Historical discharge data refers to data reflecting voltage changes during discharge of energy storage devices within a preset historical period. Historical discharge data can be represented by an actual voltage change curve. The horizontal axis of the actual voltage change curve represents the time point, and the vertical axis represents the actual voltage of the energy storage device during discharge.

[0086] In some embodiments, during the historical discharge process, the processor can collect enough actual voltage data at different time points and fit it into a curve as the actual voltage change curve.

[0087] Step 320: Based on historical discharge data, determine the first duration proportion of the energy storage device in a single historical discharge process.

[0088] In some embodiments, the processor can calculate the ratio of the duration of the energy storage device being in the target voltage range during a single historical discharge to the total discharge duration of the single historical discharge, and use this ratio as a first duration ratio. More information about the first duration ratio can be found in [link to relevant documentation]. Figure 2 The corresponding description.

[0089] Step 330: Based on the first duration ratio and the corresponding battery pack access data during multiple historical discharge processes, determine the discharge balance value of a single battery pack within a preset historical period.

[0090] Battery pack access data refers to data reflecting the accessed battery packs. For example, battery pack A is accessed.

[0091] In some embodiments, the processor can query and obtain battery pack access data from multiple historical discharge processes using historical data.

[0092] Discharge equalization value refers to an indicator that reflects the discharge quality of a battery pack.

[0093] In some embodiments, the processor can determine the discharge balance value of a single battery pack within a preset historical period through various methods based on the first duration proportions of multiple historical discharge processes and the corresponding battery pack access data. For example, for each battery pack, the processor can obtain the first duration proportions of multiple historical discharge processes of the energy storage device when it is connected to the battery management system; the weighted sum of the first duration proportions of multiple historical discharge processes is used as the discharge balance value of the battery pack. The weighting coefficients of the first duration proportions of multiple historical discharge processes can be preset by the operator based on experience.

[0094] In some embodiments, for each battery pack, the weighting coefficient of the first duration proportion of each historical discharge process is negatively correlated with the number of battery packs operating during that historical discharge process; that is, the larger the number of battery packs, the smaller the weighting coefficient of the first duration proportion of that historical discharge process.

[0095] In some embodiments, the processor can determine the discharge balance value of each battery pack within a preset historical period based on the first time period distribution during multiple historical discharge processes, the discharge information of multiple battery packs at multiple historical moments, and the corresponding battery pack access data.

[0096] The first time period distribution refers to data reflecting the distribution of energy storage devices within the target voltage range during the discharge process. For example, the first time period distribution includes the time period of each discharge and multiple sub-time periods during which the energy storage devices are within the target voltage range.

[0097] In some embodiments, the processor can determine the distribution for a first time period by querying historical data.

[0098] In some embodiments, for each battery pack, the processor can obtain a first total duration of access to the battery management system during multiple historical discharge processes; and obtain multiple sub-periods during each historical discharge process when the energy storage device is in the target voltage range, obtain the battery pack's discharge information during each sub-period, and if the battery voltage of the battery pack is within the normal data range and the discharge information is not abnormal during the sub-period, then the sub-period is recorded as the high-quality discharge period of the battery pack; calculate a second total duration of the multiple high-quality discharge periods of the battery pack; calculate the ratio of the first total duration to the second total duration, and use this ratio as the discharge equalization value of the battery pack within a preset historical period. For information on discharge information and the existence of abnormal discharge information, please refer to [link to relevant documentation]. Figure 2 The corresponding description.

[0099] In some embodiments of this specification, by statistically analyzing the distribution of the first time period, the normal discharge period of each battery pack can be determined; determining the discharge balance value based on the distribution of the first time period can make the determined discharge balance value more accurate.

[0100] In some embodiments, the processor can determine the discharge balance value of multiple battery packs based on the first duration ratio of multiple historical discharge processes, the corresponding battery pack access data, and the discharge information of multiple battery packs at multiple historical moments, through a discharge model.

[0101] A discharge model is a model used to determine the discharge equilibrium value. In some embodiments, the discharge model is a machine learning model, such as a deep neural network (DNN).

[0102] In some embodiments, the inputs to the discharge model include a first duration ratio during multiple historical discharge processes, corresponding battery pack access data, and discharge information of multiple battery packs at multiple historical moments; the outputs of the discharge model include the discharge equalization value of multiple battery packs.

[0103] In some embodiments, the discharge model can be obtained in a variety of ways. For example, it can be obtained by training based on multiple labeled training samples using gradient descent or other feasible methods.

[0104] In some embodiments, training samples and their corresponding labels can be determined experimentally. An exemplary experimental process includes: pre-setting multiple experimental battery packs and corresponding initial discharge equalization values; forming an experimental energy storage device with multiple experimental battery packs; conducting multiple discharge experiments based on the initial discharge equalization values; statistically analyzing the first duration ratio of multiple experimental discharge processes of the experimental energy storage device, the corresponding battery pack access data, and the discharge information of multiple experimental battery packs at multiple moments within a preset experimental period, using these as training samples; and using the experimental discharge equalization values ​​of the experimental battery packs as the labels corresponding to the training samples. The experimental battery packs and corresponding initial discharge equalization values ​​can be preset by personnel; the preset experimental period has the same duration as the preset historical period; and the experimental discharge equalization value is the discharge equalization value determined during the experiment. The method for determining the experimental discharge equalization value is similar to the method for determining the discharge equalization value, as described above.

[0105] As an example only, the processor can input training samples into the initial discharge model to obtain the output of the initial discharge model; based on the output and labels of the initial discharge model, a loss function is constructed; based on the loss function, the parameters of the initial discharge model are iteratively updated; until the iteration termination condition is met, the training is complete, and a trained discharge model is obtained. The iteration termination condition includes loss function convergence and the number of iterations reaching a threshold, etc.

[0106] In some embodiments, the input to the discharge model also includes a first time period distribution. More information about the first time period distribution can be found in the preceding description.

[0107] In some embodiments, when the input to the discharge model further includes a first time period distribution, the training samples also include the first time period distribution during multiple experimental discharge processes. As an example only, the processor can, during multiple discharge experiments, statistically analyze the first duration ratio, first time period distribution, corresponding battery pack access data, and discharge information of multiple experimental battery packs at multiple moments within a preset experimental time period for the experimental energy storage device, and use these as training samples.

[0108] In some embodiments of this specification, further consideration of the first time period distribution of the energy storage device when determining the discharge equalization value can further improve the accuracy of model prediction.

[0109] In some embodiments of this specification, machine learning models can be used to quickly process large amounts of data, make more accurate predictions of the discharge equalization values ​​of each battery pack, and improve the efficiency of determining the discharge equalization values; at the same time, it is beneficial for subsequently determining the battery packs to be decommissioned.

[0110] Step 340: For a single battery pack, in response to the discharge equalization value of the single battery pack being lower than a first preset threshold, the single battery pack is designated as a battery pack to be decommissioned.

[0111] The first preset threshold is a critical value preset for determining the discharge balance value of the battery pack to be withdrawn. In some embodiments, the first preset threshold can be preset by the staff based on experience.

[0112] In some embodiments, the first preset threshold is related to the gap between the actual voltage of the energy storage device and the target voltage range. Exemplarily, the greater the gap between the actual voltage of the energy storage device and the target voltage range, the greater the first preset threshold.

[0113] In some embodiments, when the gap between the actual voltage of the energy storage device and the target voltage range is greater, the required regulation force is greater. At this time, it is necessary to appropriately increase the first preset threshold so that a sufficient number of battery packs can be connected.

[0114] In some embodiments, if the number of battery packs to be withdrawn is determined as M in the way shown in the figure, and M < N, the processor may use the battery packs with the aforementioned discharge balance value lower than the first preset threshold as the battery packs to be withdrawn.

[0115] In some embodiments, the processor may also adjust multiple battery packs to be connected according to the discharge balance values of multiple battery packs.

[0116] In some embodiments, the processor may obtain the change data of the discharge balance value of each battery pack in the battery packs that can be connected; according to the change data of the discharge balance value, perform an ascending order sorting on each battery pack that can be connected, and use the first M battery packs that can be connected as the battery packs to be connected. Among them, the change data of the discharge balance value refers to the data reflecting the change of the discharge balance value of each battery pack during the discharge process, and can be represented by the difference between the highest value and the lowest value of the discharge balance value of the battery pack in multiple preset historical periods. For more content about the battery packs that can be connected, reference can be made to Figure 1 and Figure 2 the corresponding description.

[0117] In some embodiments of this specification, based on the discharge balance value, the determined battery packs that can be connected can be made more accurate.

[0118] In some embodiments of this specification, based on the historical discharge data, the determined discharge balance value can be made more accurate; based on the first preset threshold, the determination of the battery packs to be connected and the battery packs to be withdrawn can be made more reasonable, ensuring that a sufficient number of battery packs can be connected to the battery management system, which is beneficial to the efficient operation of the energy storage device.

[0119] It should be noted that the above descriptions of processes 200 and 300 are for illustrative purposes only and do not limit the scope of this specification. Those skilled in the art can make various modifications and changes to processes 200 and 300 under the guidance of this specification. However, these modifications and changes remain within the scope of this specification.

[0120] Figure 4 This is an exemplary schematic diagram illustrating the determination of a set of battery packs to be tested according to some embodiments of this specification.

[0121] In some embodiments, such as Figure 4 As shown, every preset cycle 410, the processor determines the set of battery packs to be tested 440 based on the multiple discharge equalization values ​​430 of the multiple battery packs 420 within the preset cycle 410.

[0122] For more information on multiple battery packs and sets of battery packs under test, please refer to [link / reference]. Figure 1 The corresponding description; for more information on discharge equalization values, please refer to... Figure 3 And its corresponding description.

[0123] A preset period refers to a predetermined time period. The preset period can be preset by staff based on experience. In some embodiments, the duration of the preset period is longer than the duration of a preset historical period, and the duration of the preset period is an integer multiple of the duration of the preset historical period.

[0124] The multiple discharge equalization values ​​within the preset period refer to the discharge equalization values ​​of the battery pack within the aforementioned multiple sub-periods after dividing the preset period into multiple sub-periods with the same duration as the preset historical period.

[0125] For more information on determining the discharge equalization value, please refer to [link / reference]. Figure 3 The corresponding description.

[0126] In some embodiments, the discharge balance value of the battery pack within the aforementioned multiple sub-periods can be calculated using a discharge model.

[0127] For more information on discharge models, please refer to [link / reference]. Figure 3 The corresponding description.

[0128] In some embodiments of this specification, machine learning models can be used to make the determined discharge equalization value more accurate and improve the efficiency of determining the discharge equalization value.

[0129] In some embodiments, for each battery pack, if within a preset period, the number of multiple discharge equalization values ​​of the battery pack that are less than a third preset threshold is greater than k, or if the multiple discharge equalization values ​​of the battery pack show a downward trend, then the processor can determine it as a battery pack to be tested, and thus determine the set of battery packs to be tested.

[0130] The third preset threshold refers to a preset critical value used to determine the discharge equalization value of the battery pack under test, where k is an integer and greater than 0. The third preset threshold and k can be preset by staff based on experience.

[0131] In some embodiments, the set of battery packs to be tested is related to a third preset threshold, which is related to the operating parameters of the electrical equipment. More information about the electrical equipment can be found at [link to relevant documentation]. Figure 1 The corresponding description; for more information on operating parameters, please refer to... Figure 2 The corresponding description.

[0132] As an example only, if k is a fixed value, the larger the third preset threshold is, the more battery packs will be included in the test set within the preset period if the number of the multiple discharge equalization values ​​of the battery pack is less than the third preset threshold.

[0133] In some embodiments, the third preset threshold is related to the operating parameters of the electrical equipment. As an example only, the larger the weighted sum of the operating power and operating time of the electrical equipment, the larger the third preset threshold. The weighting coefficients for operating power and operating time are preset by the operator based on experience.

[0134] In some embodiments, the larger the weighted sum of the operating power and operating time of the electrical equipment, the higher the quality of power supply the energy storage device needs to provide. In this case, it is necessary to replace / inspect and repair the battery pack with low discharge quality in a timely manner, and the third preset threshold needs to be appropriately increased.

[0135] In some embodiments of this specification, by setting a third preset threshold, the determined set of battery packs to be tested can be made more accurate; considering the operating parameters of the electrical equipment, the battery packs that need to be replaced / repaired can be accurately screened, thereby improving the discharge efficiency of the energy storage device.

[0136] In some embodiments of this specification, by determining the set of battery packs to be inspected at preset intervals, the energy storage device can be repaired / replaced in a timely manner, which is beneficial to ensuring the efficient operation of the energy storage device.

[0137] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0138] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0139] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods described herein. Although various examples have been discussed in the foregoing disclosure of some embodiments of the invention that are currently considered useful, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the spirit and scope of the embodiments described herein. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely using software solutions, such as installing the described system on existing servers or mobile devices.

[0140] Similarly, it should be noted that, in order to simplify the description disclosed herein and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of embodiments in this specification may sometimes combine multiple features into a single embodiment, drawing, or description thereof. However, this method of disclosure does not imply that the subject matter of this specification requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of a single embodiment disclosed above.

[0141] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0142] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this specification, the entire contents of which are incorporated herein by reference. This excludes historical application documents that are inconsistent with or conflict with the content of this specification, as well as documents that limit the broadest scope of the claims in this specification (currently or subsequently appended to this specification). It should be noted that in the event of any inconsistency or conflict between the descriptions, definitions, and / or terminology used in the supplementary materials to this specification and the content of this specification, the descriptions, definitions, and / or terminology used in this specification shall prevail.

[0143] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A control method for an integrated rectifier, backup power, and energy storage unit, characterized in that, include: The target voltage range of the energy storage device is determined based on the electrical equipment used by the energy storage device and the operating parameters of the electrical equipment. The energy storage device operates based on a battery management system and includes multiple battery packs; In response to the actual voltage of the energy storage device not being within the target voltage range, Obtain the set of battery packs to be tested, including: Every preset period, the set of battery packs to be tested is determined based on multiple discharge equalization values ​​of the multiple battery packs within the preset period; the multiple discharge equalization values ​​are indicators reflecting the discharge quality of the multiple battery packs. Based on the voltage fluctuation information of the energy storage device at multiple historical moments within a preset historical period, the set of battery packs to be tested, and the discharge information of the multiple battery packs at the multiple historical moments, a target set of battery packs is determined. The target set of battery packs includes battery packs to be connected and battery packs to be removed. Obtain the historical discharge data of the energy storage device within the preset historical time period; Based on the historical discharge data, a first duration proportion of the energy storage device in a single historical discharge process is determined; the first duration proportion is the proportion of the time during which the energy storage device is within the target voltage range in the single historical discharge process to the total discharge time. Based on the first duration ratio in multiple historical discharge processes and the corresponding battery pack access data, the discharge balance value of a single battery pack in the preset historical time period is determined. For the single battery pack, in response to the discharge equalization value of the single battery pack being lower than a first preset threshold, the single battery pack is designated as a battery pack to be decommissioned. Control the battery pack to be connected to the battery management system; Isolate the battery pack to be decommissioned, control the battery pack to be decommissioned to exit the battery management system, and send a notification message to the interactive screen.

2. The method according to claim 1, characterized in that, The method further includes: Based on the first duration ratio in the multiple historical discharge processes, the corresponding battery pack access data, and the discharge information of the multiple battery packs at the multiple historical moments, the discharge balance value of the multiple battery packs is determined through a discharge model, wherein the discharge model is a machine learning model.

3. A control system for an integrated rectifier, backup power, and energy storage unit, characterized in that: The system includes: The first determining module is configured to determine the target voltage range of the energy storage device based on the electrical equipment of the energy storage device and the operating parameters of the electrical equipment; the energy storage device operates based on a battery management system and includes multiple battery packs; The acquisition module is configured to acquire a set of battery packs to be tested in response to the actual voltage of the energy storage device not being within the target voltage range. The acquisition module is further configured to: Every preset period, the set of battery packs to be tested is determined based on multiple discharge equalization values ​​of the multiple battery packs within the preset period; the multiple discharge equalization values ​​are indicators reflecting the discharge quality of the multiple battery packs. The second determining module is configured to determine a target battery set based on the voltage fluctuation information of the energy storage device at multiple historical moments within a preset historical period, the set of battery packs to be tested, and the discharge information of the multiple battery packs at the multiple historical moments. The target battery set includes battery packs to be connected and battery packs to be removed. The second determining module is further configured as follows: Obtain the historical discharge data of the energy storage device within the preset historical time period; Based on the historical discharge data, a first duration proportion of the energy storage device in a single historical discharge process is determined; the first duration proportion is the proportion of the time during which the energy storage device is within the target voltage range in the single historical discharge process to the total discharge time. Based on the first duration ratio in multiple historical discharge processes and the corresponding battery pack access data, the discharge balance value of a single battery pack in the preset historical time period is determined. For the single battery pack, in response to the discharge equalization value of the single battery pack being lower than a first preset threshold, the single battery pack is designated as a battery pack to be decommissioned. The access module is configured to control the battery pack to be accessed to access the battery management system; The exit module is configured to isolate the battery pack to be exited, control the battery pack to exit the battery management system, and send a notification message to the interactive screen.

4. The system according to claim 3, characterized in that, The second determining module is further configured as follows: Based on the first duration ratio in the multiple historical discharge processes, the corresponding battery pack access data, and the discharge information of the multiple battery packs at the multiple historical moments, the discharge balance value of the multiple battery packs is determined through a discharge model, wherein the discharge model is a machine learning model.

5. A control device for an integrated rectifier, backup power, and energy storage unit, characterized in that, The device includes at least one processor and at least one memory; The at least one memory is used to store computer instructions; The at least one processor is configured to execute at least a portion of the computer instructions to implement the method as described in any one of claims 1 to 2.

6. A computer-readable storage medium, characterized in that, The storage medium stores computer instructions that, when executed by a processor, implement the method as described in any one of claims 1 to 2.

Images