Method and device for repairing battery of new generation direct current operation power supply system of hydropower station

Abstract

The invention provides a hydropower station new generation DC operation power supply system battery restoration method and device, and relates to the technical field of battery restoration, and the method comprises the steps: determining an operation condition, and collecting the operation data of each battery; analyzing the operation data to determine an abnormal to-be-repaired battery; and controlling the battery optimizer to repair the to-be-repaired battery according to a preset repair scheme. The abnormal to-be-repaired battery is determined by analyzing the operation data, so that the battery abnormity can be found in time and repaired in time, the performance reduction caused by the battery abnormity is avoided, and the health degree of the battery is improved.

Description

Technical Field

[0001] This application relates to the technical field of battery repair, and particularly to a method and device for repairing a battery of a new generation of DC operating power supply system in a hydropower station. Background Art

[0002] Lead-acid batteries are vulnerable to factors such as environment, operating conditions, and operating time during long-term operation, resulting in performance degradation or even damage. At present, the abnormal monitoring of batteries is not perfect, and it is difficult to detect abnormalities in a timely manner. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems in the related art to some extent.

[0004] To this end, the first object of this application is to propose a device for repairing a battery of a new generation of DC operating power supply system in a hydropower station.

[0005] The second object of this application is to propose a method.

[0006] The third object of this application is to propose an electronic device.

[0007] The fourth object of this application is to propose a computer-readable storage medium.

[0008] The fifth object of this application is to propose a computer program product.

[0009] To achieve the above object, an embodiment of the first aspect of this application proposes a device for repairing a battery of a new generation of DC operating power supply system in a hydropower station, including:

[0010] An input power supply, a bidirectional AC / DC converter, a battery pack, a battery optimizer, a DC / DC converter, and a unidirectional conduction module;

[0011] The output end of the input power supply is connected to the bidirectional AC / DC converter;

[0012] The bidirectional AC / DC converter is connected to a first node;

[0013] The battery pack includes a plurality of batteries connected in series, and the positive electrode of the battery pack is connected to the first node through the unidirectional conduction module;

[0014] Both ends of each battery are connected to the first end of the battery optimizer;

[0015] The second end of the battery optimizer is connected to the input end of the DC / DC converter, the output end of the DC / DC converter is connected to a second node, and the second node is connected to a load.

[0016] To achieve the above object, an embodiment of the second aspect of the present application proposes a battery repair method for a new generation of DC operating power supply system in a hydropower station, including:

[0017] Determine the operating condition and collect the operating data of each battery;

[0018] Analyze the operating data to determine the battery to be repaired with anomalies;

[0019] Control the battery optimizer to repair the battery to be repaired according to a preset repair plan.

[0020] Optionally, the determination of the operating condition includes:

[0021] In response to the input power supply being in the power supply state, determine that the operating condition is the power supply condition. Under the power supply condition, the input power supply inputs current to the battery pack and the load;

[0022] In response to the input power supply being in the stop state, determine that the operating condition is the power-off condition. Under the power-off condition, the battery pack outputs current to the load.

[0023] Optionally, the analysis of the operating data to determine the battery to be repaired with anomalies includes:

[0024] Detect the current capacity or current internal resistance of each battery;

[0025] Perform calculations based on the current capacity or current internal resistance to obtain the battery health state;

[0026] Determine the battery with a battery health state lower than a preset threshold as the battery to be repaired.

[0027] Optionally, the calculation based on the current capacity or current internal resistance to obtain the battery health state includes:

[0028] Calculate the battery health state based on the current internal resistance in combination with the initial and failure internal resistances. The formula is: SOH = (R 初始 -R 当前 ) / (R 失效 -R 初始 ), where SOH is the battery health state, R 当前 is the current internal resistance, R 初始 is the initial internal resistance, and R 失效 is the failure internal resistance; or,

[0029] Calculate the battery health state based on the current capacity in combination with the rated capacity of the battery. The formula is: SOH = current capacity / rated capacity.

[0030] Optionally, controlling the battery optimizer to repair the battery to be repaired according to a preset repair solution includes:

[0031] Obtaining a repair current value and a repair duration in the repair solution;

[0032] Controlling a DC / DC converter corresponding to the battery optimizer corresponding to the battery to be repaired to apply a current to the battery in the battery pack, where the value of the current is the repair current value.

[0033] Optionally, the method further includes:

[0034] Determining to start the repair when the battery is in a non-alarm state and the state of charge of the battery is greater than a preset threshold.

[0035] To achieve the above object, an embodiment of the third aspect of the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0036] The memory stores computer execution instructions;

[0037] The processor executes the computer execution instructions stored in the memory to implement the method according to any one of the first aspect.

[0038] To achieve the above object, an embodiment of the fourth aspect of the present application provides a computer-readable storage medium, in which computer execution instructions are stored, and when the computer execution instructions are executed by a processor, they are used to implement the method according to any one of the first aspect.

[0039] To achieve the above object, an embodiment of the fifth aspect of the present application provides a computer program product, and when the computer program is executed by a processor, it implements the method according to any one of the first aspect.

[0040] The battery repair method, device, electronic device and storage medium for the new generation DC operation power supply system of a hydropower station provided by the present application analyze the operation data to determine the battery to be repaired with anomalies, realize the timely discovery of battery anomalies, and timely repair them, avoid the performance degradation caused by battery anomalies, and improve the battery health.

[0041] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0043] Figure 1 The structural schematic diagram of a battery repair device for a new generation of DC operating power supply system in a hydropower station provided by an embodiment of the present application;

[0044] Figure 2 The process schematic diagram of a battery repair method for a new generation of DC operating power supply system in a hydropower station provided by an embodiment of the present application;

[0045] Figure 3 The first working condition schematic diagram of a battery repair device for a new generation of DC operating power supply system in a hydropower station provided by an embodiment of the present application;

[0046] Figure 4 The second working condition schematic diagram of a battery repair device for a new generation of DC operating power supply system in a hydropower station provided by an embodiment of the present application. Detailed implementation manners

[0047] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, but should not be construed as limiting the present application.

[0048] As an important part of clean energy, the stable operation of hydropower plants is crucial for the stable power supply of the power grid. The DC operating power supply system provides necessary backup power for the power plant to ensure safe and reliable operation in case of emergencies. However, lead-acid batteries, as the main component of the DC operating power supply system, are vulnerable to many factors during operation, resulting in performance degradation or even damage. Therefore, battery repair is particularly important. In response to the above problems, relevant technical personnel have conducted a large number of studies, and related battery repair technologies have emerged. In related technologies, nano-carbon active agents and pulse composite repair technologies are used to repair the upper limit of the capacity of retired batteries, but there are defects such as high cost and high requirements for technical personnel, which greatly limit their application. In related technologies, for a single battery with a relatively large internal resistance, it is separately taken out and repeatedly charged and discharged to reduce the internal resistance and thus achieve battery repair. However, this method has complex steps and high safety hazards. To sum up, the current technical solutions for battery repair generally have problems such as high operation requirements, large safety hazards, and low degree of automation of repair, and cannot fully guarantee the reliability of the DC operating power supply system.

[0049] In response to this problem, the present application proposes a battery repair device for a new generation of DC operating power supply system in a hydropower station. Figure 1 The structural schematic diagram of a battery repair device for a new generation of DC operating power supply system in a hydropower station provided by an embodiment of the present application. As Figure 1As shown in the figure, the device includes: an input power supply 1, a bidirectional AC / DC converter 2, a battery pack 3, a battery optimizer 4, a DC / DC converter 5, and a unidirectional conduction module 6;

[0050] The output terminal of the input power supply is connected to the bidirectional AC / DC converter;

[0051] The bidirectional AC / DC converter is connected to a first node;

[0052] The battery pack contains multiple batteries connected in series, and the positive pole of the battery pack is connected to the first node through the unidirectional conduction module;

[0053] Both ends of each battery are connected to the first end of the battery optimizer;

[0054] The second end of the battery optimizer is connected to the input terminal of the DC / DC converter, the output terminal of the DC / DC converter is connected to a second node, and the second node is connected to a load.

[0055] In this embodiment, the bidirectional AC / DC converter is connected to the AC power grid and is used to convert AC power into DC power and output it. The batteries in the battery pack are in a hybrid connection form, ensuring the advantages of series and parallel connections. Each single battery is equipped with a battery optimizer, and combined with the DC / DC module, functions such as data monitoring, automatic control, and online automatic repair under different working conditions can be realized. This architecture ensures the feasibility of the online automatic battery repair solution.

[0056] The battery optimizer is used to monitor the operating data of the battery and transmit it to the control module, and the control module issues instructions to control the battery optimizer to perform various operations on the battery (including battery repair).

[0057] The deterioration of lead-acid batteries is the result of the combined action of factors such as battery design, complex operating environments, and variable operating conditions. Except for irreversible internal battery damage, performance degradation caused by water loss or sulfation is repairable.

[0058] The embodiment of the present application provides a method for repairing batteries of a new generation of DC operating power supply system for hydropower stations, Figure 1 which is a schematic flowchart of a method for repairing batteries of a new generation of DC operating power supply system for hydropower stations provided by the embodiment of the present application. As Figure 1 shown, the method includes the following steps:

[0059] Step 201, determine the operating conditions and collect the operating data of each battery;

[0060] Step 202, analyze the operating data to determine the batteries to be repaired with abnormalities;

[0061] Step 203: Control the battery optimizer to repair the battery to be repaired according to a preset repair solution.

[0062] Optionally, the determination of the operating condition in step 201 includes:

[0063] In response to the input power supply being in the power supply state, determine that the operating condition is the power supply condition. In the power supply condition, the input power supply inputs current to the battery pack and the load;

[0064] In response to the input power supply being in the stop state, determine that the operating condition is the power-off condition. In the power-off condition, the battery pack outputs current to the load.

[0065] In this embodiment, there are 2 types of operating conditions for the battery. Figure 3 FIG. is a schematic diagram of the first operating condition of a battery repair device for a new generation of DC operating power supply system of a hydropower station provided by an embodiment of the present application; as Figure 3 shown, in this condition, the input power supply is in the power supply state. At this time, the power supply is used to supply power to the battery pack and the load. The load current is IR, the charging current of the battery pack is IB, and the mains power supply current is IS.

[0066] Figure 4 FIG. is a schematic diagram of the second operating condition of a battery repair device for a new generation of DC operating power supply system of a hydropower station provided by an embodiment of the present application; as Figure 4 shown, in this condition, the input power supply is in the stop state, and the battery pack discharges for the load to ensure the reliability of system power supply.

[0067] Optionally, the analysis of the operating data in step 202 to determine the battery to be repaired with an abnormality includes:

[0068] Detect the current capacity or current internal resistance of each battery;

[0069] Perform calculations based on the current capacity or current internal resistance to obtain the battery health state;

[0070] Determine the battery with a battery health state lower than a preset threshold as the battery to be repaired.

[0071] In this embodiment, the deterioration of lead-acid batteries is the result of the combined action of factors such as battery design, complex operating environments, and variable operating conditions. Excluding irreversible internal battery damage, performance degradation caused by water loss or sulfation is repairable. Batteries with a lower battery health state are the objects to be repaired.

[0072] The State of Health (SOH) of a battery is an important indicator for measuring the performance and life status of the battery, representing the current health status of the battery, that is, the ratio of the actual capacity of the battery to its design capacity or the capacity of a new battery. It reflects the degree of performance degradation of the battery during use and the remaining service life.

[0073] The relevant parameters of the battery such as temperature, voltage, current, and internal resistance can reflect the upper limit of the battery's capacity (i.e., the health status) to a certain extent. Therefore, by detecting the above-mentioned relevant parameters, it is possible to identify whether the battery has a repair requirement. Table 1 shows the relationship between the capacity and internal resistance of a certain type of gel battery. It can be clearly analyzed from this table that the internal resistance of the battery can reflect its upper limit of capacity to a certain extent.

[0074] Serial number Capacity upper limit C / Ah Internal resistance mOhm 1 200 0.95 2 250 0.76 3 300 0.66 4 350 0.61 5 400 0.51

[0075] Table 1

[0076] Optionally, the operation according to the current capacity or the current internal resistance to obtain the battery health status includes:

[0077] Calculating the battery health status based on the current internal resistance in combination with the initial and failure internal resistances. The formula is: SOH = (R 初始 - R 当前 ) / (R 失效 - R 初始 ), where SOH is the battery health status, R 当前 is the current internal resistance, R 初始 is the initial internal resistance, and R 失效 is the failure internal resistance; or,

[0078] Calculating the battery health status based on the current capacity in combination with the rated capacity of the battery. The formula is: SOH = current capacity / rated capacity.

[0079] In this embodiment, the internal resistance of the battery increases with the increase of the use time. By measuring the change of the battery internal resistance, the health degree of the battery can be indirectly reflected. The initial internal resistance is the internal resistance when the battery is produced, and the failure internal resistance is the minimum internal resistance when the battery cannot be used continuously. Batteries with an internal resistance greater than the failure internal resistance cannot be used normally.

[0080] The rated capacity is the capacity when the battery leaves the factory. As the number of charge-discharge cycles increases, the capacity and performance of the battery will gradually decline. What is calculated by SOH = current capacity / rated capacity is the percentage of the current battery capacity in the rated capacity, which can reflect the health status of the battery.

[0081] Optionally, the step 203 controls the battery optimizer to repair the battery to be repaired according to a preset repair plan, including:

[0082] Obtain the repair current value and repair duration in the repair solution;

[0083] Control the battery optimizer corresponding to the battery to be repaired to control the corresponding DC / DC converter to apply current to the batteries in the battery pack, and the value of the current is the repair current value.

[0084] In this embodiment, the battery is repaired by reducing the density of the electrolyte in the battery. Specifically, small current and long-time charging are used to increase the solubility of lead sulfate. By changing the concentration of the electrolyte and the magnitude of the current, the dissolution and conversion of lead sulfate crystals are promoted, thereby restoring the activity of the battery.

[0085] In a possible embodiment, the repair current value is 0.001C (0.05A), and the repair time is 12 hours.

[0086] Optionally, the method further includes:

[0087] When the battery is in a non-alarm state and the state of charge (SOC) of the battery is greater than a preset threshold, it is determined to start the repair.

[0088] In this embodiment, before starting the repair, it is first necessary to determine whether the current state of the battery supports the repair. First, it is necessary to determine whether the battery has an alarm, and then determine whether the SOC of the battery meets the repair conditions. The SOC is a quantitative indicator of the remaining battery power, and its value range is usually between 0 and 1, or expressed as a percentage. 1 or 100% means the battery is fully charged, and 0 or 0% means the battery is fully discharged. If the SOC of the battery is too low, the repair cannot be carried out. In a possible embodiment, the preset threshold is 80%, that is, the repair can only be carried out when the battery power is greater than 80%.

[0089] When the above conditions are met, the DC / DC converter can be started to control the battery optimizer to repair the single battery.

[0090] To implement the above embodiment, the present application also provides an electronic device, including: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided in the foregoing embodiment.

[0091] To implement the above embodiment, the present application also provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the method provided in the foregoing embodiment.

[0092] To implement the above embodiments, the present application also provides a computer program product, including a computer program, which when executed by a processor implements the method provided by the foregoing embodiments.

[0093] The collection, storage, use, processing, transmission, provision, and disclosure of the user's personal information involved in the present application all comply with the provisions of relevant laws and regulations and do not violate public order and good customs.

[0094] It should be noted that personal information from users should be collected for legal and reasonable purposes and not shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after obtaining the informed consent of the user, including but not limited to notifying the user to read the user agreement / user notice and sign an agreement / authorization including authorizing relevant user information before the user uses the function. In addition, any necessary steps should be taken to safeguard and protect access to such personal information data and ensure that others with access to the personal information data comply with their privacy policies and procedures.

[0095] The present application anticipates providing embodiments in which users can selectively block the use or access of personal information data. That is, the present disclosure anticipates providing hardware and / or software to prevent or block access to such personal information data. Once personal information data is no longer needed, the risk can be minimized by restricting data collection and deleting the data. In addition, when applicable, personal identifiers are removed from such personal information to protect the privacy of the user.

[0096] In the description of the foregoing embodiments, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0097] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0098] Any process or method description represented in a flowchart or otherwise described herein can be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of the present application includes additional implementations in which functions may be executed not in the order shown or discussed, including in a substantially simultaneous manner according to the functions involved or in a reverse order, which should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0099] The logic and / or steps represented in a flowchart or otherwise described herein, for example, can be considered a sequenced list of executable instructions for implementing a logical function, and can be embodied specifically in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device. As used in this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection having one or more wires (electronic device), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable medium on which the program can be printed, as the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or other suitable processing as necessary, and then stored in a computer memory.

[0100] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one of the following techniques known in the art or a combination thereof can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0101] Those of ordinary skill in the art can understand that all or part of the steps carried out in the method of the above embodiments can be completed by instructing relevant hardware through a program. The said program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0102] In addition, each functional unit in various embodiments of the present application can be integrated in a processing module, or each unit can exist physically alone, or two or more units can be integrated in a module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. When the above integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0103] The above-mentioned storage medium can be a read-only memory, a magnetic disk or an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application.

Claims

1. A new generation of battery repair device for DC operating power supply system of hydropower station, characterized in that: include: Input power supply, bidirectional AC / DC converter, battery pack, battery optimizer, DC / DC converter, unidirectional conductive module; The output end of the input power supply is connected to the bidirectional AC / DC converter; The bidirectional AC / DC converter is connected to the first node; The battery pack comprises a plurality of batteries connected in series, and the positive electrode of the battery pack is connected to the first node through the unidirectional conductive module; Two ends of each of the batteries are connected to the first end of the battery optimizer; The second end of the battery optimizer is connected to the input end of the DC / DC converter, the output end of the DC / DC converter is connected to a second node, and the second node is connected to a load.

2. A method for repairing batteries in a new generation of DC operating power supply system for a hydropower station, characterized in that: The battery repair device for the new generation DC operating power supply system of the hydropower station as claimed in claim 1 comprises the following steps: Determine the operating conditions and collect the operating data of each battery; Analyzing the operating data to determine an abnormal battery to be repaired; The battery optimizer is controlled to repair the battery to be repaired according to a preset repair scheme.

3. The method according to claim 2, characterized in that Determining the operating conditions includes: In response to the input power source being in a power supply state, determining that the operating condition is a power supply condition, in which the input power source inputs current into the battery pack and the load; In response to the input power being in a stopped state, it is determined that the operating condition is a power outage condition, and under the power outage condition, the battery pack outputs current to the load.

4. The method according to claim 3, characterized in that The step of analyzing the operating data to determine an abnormal battery to be repaired includes: Detect the current capacity or current internal resistance of each battery; Performing calculations based on the current capacity or the current internal resistance to obtain a battery health status; A battery whose battery health status is lower than a preset threshold is determined as the battery to be repaired.

5. The method according to claim 4, characterized in that The performing calculation according to the current capacity or the current internal resistance to obtain the battery health status includes: The battery health status is calculated based on the current internal resistance combined with the initial and failure internal resistances: SOH = (R 初始 -R 当前 ) / (R 失效 -R 初始 ), where SOH is the battery health state, R 当前 is the current internal resistance, R 初始 is the initial internal resistance, R 失效 is the failure internal resistance; or, The battery health state is calculated based on the current capacity combined with the rated capacity of the battery, and the formula is: SOH=current capacity / rated capacity.

6. The method according to claim 5, characterized in that The controlling the battery optimizer to repair the battery to be repaired according to a preset repair scheme includes: Obtaining a repair current value and a repair duration in the repair scheme; The battery optimizer corresponding to the battery to be repaired controls the corresponding DC / DC converter to apply current to the battery in the battery pack, and the value of the current is the repair current value.

7. The method according to claim 6, characterized in that The method further comprises: When the battery is in a non-alarm state and the state of charge of the battery is greater than a preset threshold, it is determined to start repairing.

8. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 2 to 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 2 to 7 when executed by a processor.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 2 to 7 when being executed by a processor.

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