Energy storage system wiring fault detection method and device, energy storage system and electrical equipment

Abstract

The present application discloses a method and device for detecting wiring faults in an energy storage system, an energy storage system and electrical equipment, and relates to the technical field of energy storage systems, wherein the energy storage system includes multiple power conversion modules, multiple power supply modules, and a pre-charging module connected in series between each power conversion module and the power supply module, and the method for detecting wiring faults in the energy storage system includes: controlling the output of multiple power supply modules and controlling multiple pre-charging modules for pre-charging; obtaining the output voltage of the power supply module and obtaining the pre-charging voltage output to the power conversion module by the pre-charging module after the pre-charging is completed; determining the wiring fault of the energy storage system according to the magnitude relationship between the output voltage and the pre-charging voltage. In this way, the connection status of the energy storage system can be detected to ensure that the energy storage system can exert its original working efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage systems, and in particular to a method and device for detecting wiring faults in energy storage systems, an energy storage system, and electrical equipment. Background Art

[0002] The energy storage system includes an energy storage battery box and a PCS all-in-one machine. The energy storage battery box integrates multiple power supply modules (i.e., batteries), a battery management system, and other necessary electrical equipment for controlling power supply; the PCS all-in-one machine integrates multiple power conversion modules for converting between AC and DC. Among them, the multiple power conversion modules of the PCS all-in-one machine match one-to-one with the multiple power supply modules in the energy storage battery box for one-to-one connection control.

[0003] However, in current energy storage systems, power control errors often occur between battery containers and PCS integrated machines, which reduces the working efficiency of the energy storage system. Summary of the invention

[0004] The main purpose of this application is to propose a method and device for detecting wiring faults in an energy storage system, an energy storage system and electrical equipment, aiming to ensure that the energy storage system can exert its original working efficiency by detecting the connection status of the energy storage system.

[0005] In a first aspect, to achieve the above-mentioned purpose, the present application proposes a method for detecting wiring faults in an energy storage system, wherein the energy storage system comprises a plurality of power conversion modules, a plurality of power supply modules, and a pre-charging module connected in series between each of the power conversion modules and the power supply modules, and the method for detecting wiring faults in the energy storage system comprises: controlling the output of a plurality of power supply modules and controlling a plurality of pre-charging modules to perform pre-charging; obtaining the output voltage of the power supply module and obtaining the pre-charging voltage outputted by the pre-charging module to the power conversion module after the pre-charging is completed; and determining the wiring fault of the energy storage system according to the relationship between the output voltage and the pre-charging voltage.

[0006] It is understandable that the energy storage system wiring fault detection method provided in the present application detects the output voltage of each power supply module at the initial stage of system startup, then controls the pre-charge module to stop working after a preset time, and detects the pre-charge voltage when the pre-charge module stops working, and finally judges the connection status by comparing the output voltage of the power supply module and the magnitude relationship of the pre-charge voltage. If the pre-charge voltage is close to the output voltage of the power supply module and is within the preset range, it is considered that the connection is correct; conversely, if the pre-charge voltage is significantly lower than the output voltage of the power supply module or there is a significant deviation, it indicates a connection error. In this way, this method can not only effectively prevent system performance degradation and safety hazards caused by wiring faults, but also improve the reliability and safety of the system, simplify the maintenance process, reduce operation and maintenance costs, and ensure the efficient operation of the energy storage system.

[0007] In some embodiments, determining the wiring fault of the energy storage system based on the relationship between the output voltage and the pre-charge voltage includes: when the difference between the output voltage of any power supply module and the pre-charge voltage of the pre-charge module paired with it is greater than a first preset difference, determining that the energy storage system has a first wiring fault.

[0008] It is understandable that in actual applications, due to various factors (such as line loss, equipment aging, etc.), there may be a certain difference between the output voltage of the power supply module and the pre-charge voltage of the pre-charge module. In order to adapt to these actual situations, a first preset difference is introduced as a threshold for judging the connection status. In this way, the system can more flexibly respond to various situations in actual applications and avoid misjudging wiring faults due to small voltage differences.

[0009] In some embodiments, determining the wiring fault of the energy storage system based on the relationship between the output voltage and the pre-charge voltage includes: determining that the energy storage system has a first wiring fault when it is determined that the output voltage of any power supply module and the pre-charge voltage of the pre-charge module paired with it are not equal.

[0010] It is understandable that this is a judgment method applied under ideal conditions. Under ideal conditions, after the output voltage of the power supply module is output to the pre-charging module, the pre-charging voltage of the pre-charging module after pre-charging is completed will be equal to the output voltage of the power supply module. In this way, the wiring conditions under ideal conditions can be determined, and wiring faults can be detected in time, and corresponding measures can be taken to ensure that the energy storage system can exert its original working efficiency.

[0011] In some embodiments, the energy storage system further includes an alarm system, and the energy storage system wiring fault detection method further includes: in response to a numbering instruction, numbering the multiple power supply modules and the multiple pre-charging modules respectively; in the case that there is a first wiring fault in the energy storage system, determining the number of each power supply module and the number of the pre-charging module that are in the first wiring fault; the alarm system outputs an alarm signal and indicates the number.

[0012] It is understandable that this not only accurately detects and records faults, but also promptly notifies technicians through the alarm system and indicates the number of the module with the specific wiring fault. This improves the maintainability and response speed of the system, ensuring the safe and stable operation of the energy storage system. Ultimately, it also reduces the impact of wiring faults on the system, ensuring that the energy storage system can perform its original work efficiency.

[0013] In some embodiments, each of the power supply modules has a positive output interface and a negative output interface, and each of the pre-charging modules has a positive input interface and a negative input interface, the positive output interface is used to connect to the positive input interface, and the negative output interface is used to connect to the negative input interface; the first wiring fault indicates that in the energy storage system, the positive output interface of at least one of the power supply modules is connected to the positive input interface or the negative input interface of one of the two power conversion modules, and the negative output interface of the power supply module is connected to the positive input interface or the negative input interface of the other of the two power conversion modules; or, the first wiring fault indicates that in the energy storage system, the positive output interface of at least one power supply module is connected to the negative input interface of a pre-charging module, and the negative output interface of the power supply module is connected to the positive input interface of the pre-charging module.

[0014] It can be understood that by clarifying the definition and specific circumstances of the first wiring fault, the impact of the wiring fault on the system can be better understood, and these problems can be discovered and handled in a timely manner through the energy storage system wiring fault detection method to ensure the safe and stable operation of the energy storage system.

[0015] In some embodiments, before controlling the output of multiple power supply modules and controlling multiple pre-charging modules to perform pre-charging, the energy storage system wiring fault detection method also includes: detecting the insulation resistance value between the positive and negative poles of each of the power supply modules; when the insulation resistance of each of the power supply modules is greater than a preset resistance value, controlling the multiple power supply modules to start working; when the insulation resistance of any of the power supply modules is not greater than the preset resistance value, controlling the multiple power supply modules to remain in standby state or enter standby state.

[0016] It can be understood that through insulation testing, it can be ensured that all power supply modules are in good insulation condition before startup, avoiding electrical faults caused by poor insulation.

[0017] In some embodiments, controlling the output of multiple power supply modules and controlling multiple pre-charging modules to pre-charge includes: controlling the multiple power supply modules to supply power to the pre-charging modules connected thereto in a preset power supply sequence, and controlling the multiple pre-charging modules to work in sequence in the power supply sequence for a preset time and then stop working.

[0018] It is understandable that a power supply sequence is set, such as 1, 2, 3. Then, in accordance with the set sequence, each power supply module is controlled in turn to supply power to the pre-charging module connected to it. After receiving the electric energy, each pre-charging module starts the pre-charging process and stops working after a preset time. In one example, the power supply module SM1 supplies power first, the pre-charging module PM1 starts pre-charging and stops after a preset time; then the power supply module SM2 supplies power, the pre-charging module PM2 starts pre-charging and stops after a preset time, and so on. In this way, through sequential control, it is ensured that the connection status of each power supply module and the pre-charging module can be detected separately to avoid mutual interference when multiple modules work at the same time. At the same time, the present embodiment can simultaneously detect the first wiring fault and the second wiring fault to ensure that the energy storage system can exert its original working efficiency.

[0019] It should be noted that after the pre-charging module works for a preset time, it means that the pre-charging module has completed the pre-charging or ended the pre-charging.

[0020] In some embodiments, determining a wiring fault in the energy storage system based on the relationship between the output voltage and the pre-charge voltage includes: when in any sequence the output voltage of the corresponding power supply module and the pre-charge voltage of the pre-charge module paired with it are greater than a first preset difference, determining that the working power supply module is incorrectly connected to the pre-charge module connected thereto, and determining that a fault exists in the energy storage system.

[0021] It is understandable that if the power supply sequence is 1, 2, 3, the working sequence of the pre-charging module is also 1, 2, 3. If the difference is too large in a certain sequence, it means that the pre-charging module in the corresponding sequence is not correctly connected to the pre-charging module of the paired power conversion module, and the specific wiring fault can be the first wiring fault or the second wiring fault. In this way, through the energy storage system wiring fault detection method, the first wiring fault and the second wiring fault can be effectively detected and prevented, ensuring that the energy storage system can exert its original working efficiency and improve the safety and reliability of the system.

[0022] In some embodiments, the energy storage system wiring fault detection method also includes: in response to a numbering instruction, numbering multiple power supply modules and multiple pre-charging modules in sequence, the number of each power supply module being the same as the number of the pre-charging module used to pair with it; after determining that the energy storage system has a fault, it also includes: recording the number of the incorrectly connected power supply module and the number of the pre-charging module connected to it; based on the correspondence between the numbers of the power supply module and the pre-charging module, redetermining the control logic of the pre-charging module to be connected and corrected with the power supply module; controlling the multiple power supply modules to supply power to the pre-charging modules to be connected and corrected respectively; when the difference between the output voltage of each pre-charging module to be connected and corrected and the corresponding power supply module is not greater than a first preset difference, determining that the correction of each incorrectly connected power supply module and the pre-charging module to be connected and corrected is completed.

[0023] It can be understood that the second wiring fault can be corrected in this way. By automatically detecting and correcting the wiring fault, it can be ensured that each power supply module and pre-charging module are correctly connected, avoiding system performance degradation and safety hazards caused by wiring faults.

[0024] In some embodiments, the energy storage system wiring fault detection method also includes: in response to a numbering instruction, numbering multiple power supply modules and multiple pre-charging modules in sequence, the number of each power supply module being the same as the number of the pre-charging module used for paired connection; after determining that the energy storage system has a fault, it also includes: recording the number of the power supply module with the connection error and the number of the pre-charging module connected thereto; redetermining the control logic of the pre-charging module to be connected and corrected with the power supply module according to the correspondence between the number of the power supply module and the number of the pre-charging module; controlling multiple power supply modules to supply power to the pre-charging modules to be connected and corrected respectively; when the difference between the output voltage of any pre-charging module to be connected and corrected and the corresponding power supply module is greater than a first preset difference, determining that the energy storage system has a first wiring fault, and outputting an alarm message, the alarm message including the corresponding numbers of the power supply module and the pre-charging module to be checked.

[0025] It is understandable that the second wiring fault can be corrected by replacing the corresponding control logic in this method. If the energy storage system becomes correctly connected after correction, then the correction is successful and no alarm is required. If there is still a wiring fault in the energy storage system after correction, then the wiring fault at this time is the first wiring fault, and a corresponding alarm signal is generated at this time to instruct the operator to make manual corrections. In this way, by automatically detecting and correcting wiring faults, it is ensured that each power supply module and pre-charging module are correctly connected, avoiding system performance degradation and safety hazards caused by wiring faults.

[0026] In some embodiments, controlling the output of multiple power supply modules and controlling the pre-charging of multiple pre-charging modules include: in response to a numbering instruction, numbering multiple power supply modules and multiple pre-charging modules in sequence, the number of each power supply module being the same as the number of the pre-charging module paired with it; controlling the output of the power supply modules one by one; and in the case of the output of each power supply module, controlling the multiple pre-charging modules to work in sequence for a preset time and then stop working.

[0027] It is understandable that, by controlling the operation of the power supply modules one by one and detecting the pre-charge status and number of the pre-charge modules one by one, the first wiring fault and the second wiring fault can be detected more directly and accurately. In this way, the connection status of the energy storage system before startup is ensured to be correct, the safety and reliability of the system are improved, and the performance degradation and safety hazards caused by wiring faults are reduced. In addition, the detection records and number management improve the traceability and maintainability of the system, making it easier for technicians to quickly locate and handle problems, and optimizing the overall performance and maintenance efficiency of the system.

[0028] In some embodiments, determining the wiring fault of the energy storage system based on the magnitude relationship between the output voltage and the pre-charge voltage includes: when the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than a first preset difference, and the number of the pre-charge module is different from the number of the working power supply module, determining that the energy storage system has a second wiring fault; after multiple pre-charge modules complete their work in sequence, when the difference between the pre-charge voltage of multiple pre-charge modules and the output voltage of the power supply module connected thereto is greater than the first preset difference, determining that the energy storage system has a first wiring fault.

[0029] It is understandable that, in this way, the corresponding power supply module and the pre-charge module number can be recorded when a wiring fault occurs, and the control logic can be adjusted. Wiring faults can be discovered and handled in a timely manner, and electrical faults caused by wiring faults, such as short circuits and leakage, can be avoided, thereby protecting the safety of the system and operators.

[0030] In some embodiments, when the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than a first preset difference, and the number of the pre-charge module is different from the number of the working power supply module, determining that the energy storage system has a second wiring fault includes: when the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than a first preset difference, and the number of the pre-charge module is different from the number of the working power supply module, recording the number of the power supply module and the number of the pre-charge module; and redetermining the control logic of the pre-charge module to be connected and corrected with the power supply module based on the correspondence between the number of the power supply module and the number of the pre-charge module.

[0031] It can be understood that, in this way, the corresponding power supply module and the pre-charging module number when the wiring fault occurs can be recorded, and the control logic can be adjusted, so that the second wiring fault can be discovered and handled in time.

[0032] In some embodiments, controlling the output of multiple power supply modules and controlling multiple pre-charging modules to pre-charge includes: in response to a numbering instruction, numbering multiple power supply modules and multiple pre-charging modules in turn, the number of each power supply module being the same as the number of the pre-charging module used for paired connection therewith; controlling the multiple power supply modules to supply power to the pre-charging modules in turn, and controlling the multiple pre-charging modules to work simultaneously for a preset time and then stop working.

[0033] It is understandable that first, all pre-charging modules are turned on at the same time, and when the power supply modules are turned on one by one, the corresponding connection status of each power supply module when it is turned on is determined. Compared with turning on the pre-charging modules one by one, the method of turning on all pre-charging modules at the same time in the energy storage system wiring fault detection method can more efficiently detect and prevent the first wiring fault and the second wiring fault, ensuring that the connection status of the energy storage system is correct before startup. In this way, the safety and reliability of the system are ensured, and the performance degradation and safety hazards caused by wiring faults are reduced, thereby ensuring that the energy storage system can exert its original working efficiency.

[0034] In some embodiments, determining the wiring fault of the energy storage system based on the magnitude relationship between the output voltage and the pre-charging voltage includes: respectively recording the number of the pre-charging module and the number of the power supply module when pre-charging is successful, and the number of the pre-charging module and the number of the power supply module when pre-charging is unsuccessful, wherein the successful pre-charging indicates that the difference between the pre-charging voltage of the pre-charging module and the output voltage of the power supply module is not greater than a first preset difference, and the unsuccessful pre-charging indicates that the difference between the pre-charging voltage of the pre-charging module and the output voltage of the power supply module is greater than the first preset difference; in the case of recording the numbers of the pre-charging module and the power supply module when pre-charging is unsuccessful, determining that the pre-charging module and the power supply module that failed to pre-charge are incorrectly connected, and determining that the energy storage system has a first wiring fault; in the case of recording that the numbers of the pre-charging module and the power supply module when pre-charging is successful do not correspond, determining that the pre-charging module and the power supply module corresponding to the numbers are incorrectly connected, and determining that the energy storage system has a second wiring fault.

[0035] It can be understood that, by dividing the wiring fault into the first wiring fault and the second wiring fault, all wiring fault modes are included, and each wiring fault mode can be better detected.

[0036] In some embodiments, each of the power supply modules has a positive output interface and a negative output interface, each of the pre-charging modules has a positive input interface and a negative input interface, the positive output interface is used to connect to the negative input interface, and the negative output interface is used to connect to the positive input interface; the wiring fault of the energy storage system includes a first wiring fault and a second wiring fault; the first wiring fault indicates that in the energy storage system, the positive output interface of at least one of the power supply modules is connected to the positive input interface or the negative input interface of one of the two power conversion modules, and the negative output interface of the power supply module is connected to the positive input interface or the negative input interface of the two power conversion modules. Another's positive input interface or negative input interface; or, the first wiring fault indicates that in the energy storage system, the positive output interface of at least one power supply module is connected to the negative input interface of a pre-charging module, and the negative output interface of the power supply module is connected to the positive input interface of the pre-charging module; the second wiring fault indicates that in the energy storage system, there is a power supply module numbered N whose positive output interface is connected to the positive input interface of a pre-charging module numbered M, and the negative output interface of the power supply module numbered N is connected to the negative input interface of the pre-charging module numbered M, and the power supply module numbered N and the pre-charging module numbered M are not paired.

[0037] It can be understood that by clarifying the definitions and specific circumstances of the first wiring fault and the second wiring fault, the impact of the wiring fault on the system can be better understood, and these problems can be discovered and handled in a timely manner through the energy storage system wiring fault detection method to ensure the safe and stable operation of the energy storage system.

[0038] In some embodiments, before controlling the output of multiple power supply modules and controlling multiple pre-charging modules to perform pre-charging, the energy storage system wiring fault detection method also includes: detecting the insulation resistance value between the positive and negative poles of each of the power supply modules; when the insulation resistance of each of the power supply modules is greater than a preset resistance value, controlling the multiple power supply modules to start working; when the insulation resistance of any of the power supply modules is not greater than the preset resistance value, controlling the multiple power supply modules to remain in standby state or enter standby state.

[0039] It can be understood that through insulation testing, it can be ensured that all power supply modules are in good insulation condition before startup, avoiding electrical faults caused by poor insulation.

[0040] In a second aspect, the present application also provides an energy storage system wiring fault detection device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor; the computer program is configured to implement the energy storage system wiring fault detection method as described in any one of the above items.

[0041] In this way, through the automated execution of the computer program, the energy storage system wiring fault detection device can efficiently and accurately detect the connection status of the power supply module and the pre-charging module, reduce human intervention, and improve detection efficiency. The energy storage system wiring fault detection device is applied to the energy storage system scenario, and it can be realized by detecting the connection status of the energy storage system to ensure that the energy storage system can play its original working efficiency.

[0042] In a third aspect, the present application also provides an energy storage system, which includes multiple power supply modules, multiple power conversion modules and the energy storage system wiring fault detection device as described above; the multiple power supply modules and the multiple power conversion modules are paired one by one; the power conversion module has a pre-charging module, and the power supply module is connected to the power conversion module through the pre-charging module; the energy storage system wiring fault detection device is used to detect the connection status between the multiple power supply modules and the multiple power conversion modules, and control the energy storage system to perform corresponding work according to the connection status.

[0043] It is understandable that by applying the energy storage system wiring fault detection device in the energy storage system, the system can detect and monitor the connection status between the power supply module and the power conversion module in real time to ensure that the connection between each power supply module and the pre-charging module is correct. Specifically, the energy storage system wiring fault detection device can timely detect and handle the first wiring fault and the second wiring fault through automated detection methods, such as numbering management, controlling the power supply of the power supply modules one by one, and recording the pre-charging status. It ensures that the connection status of the system is always in the best state, avoiding electrical failures and performance degradation caused by wiring faults. At the same time, it enables the system to operate efficiently according to the design parameters, maximize the functions of energy storage and power supply, and ensure that the energy storage system can continuously and stably exert its original working efficiency.

[0044] In some embodiments, the energy storage system also includes a transformer; the output end of each of the power conversion modules is connected to the input end of the transformer through a first switch, and the output end of the transformer is used to connect to an electrical device; the first switch is used to close when it is determined that the power supply module is connected to a power conversion module connected to it in a paired manner, so that the power conversion module converts the electric energy output by the power supply module and outputs it to the transformer; the transformer is used to transform the electric energy and output the electric energy to the electrical device.

[0045] It is understandable that when the connection is wrong, the corresponding power conversion module cannot output power to the transformer. When the connection is correct, the first switch is closed and the power conversion module can output power to the transformer. In this way, the safety of use is guaranteed, the power quality and transmission efficiency of each link are ensured, and the power demand of the power-consuming equipment is finally met.

[0046] In a fourth aspect, the present application also provides an electrical device, comprising: an equipment body and the energy storage system as described above; the output ends of multiple power conversion modules of the energy storage system are connected to the input ends of the equipment body, and when the energy storage system is in a correctly connected state, it outputs electrical energy to the equipment body, and when there is a wiring fault in the energy storage system, the corresponding power conversion module is controlled to stop outputting electrical energy to the equipment body.

[0047] It is understandable that the use of the energy storage system mentioned above in electrical equipment can reduce the negative impact of wiring faults on the energy storage system, thereby enabling the energy storage system to better output to the electrical equipment and maximize the effectiveness of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0049] Figure 1 A flow chart of a first embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0050] Figure 2 A flow chart of a second embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0051] Figure 3 A flowchart of a third embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0052] Figure 4 A flowchart of a fourth embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0053] Figure 5 A flowchart of a fifth embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0054] Figure 6 A flowchart of a sixth embodiment of the energy storage system wiring fault detection method provided by the present application;

[0055] Figure 7 A flowchart of a seventh embodiment of the energy storage system wiring fault detection method provided by the present application;

[0056] Figure 8 A flowchart of an eighth embodiment of the energy storage system wiring fault detection method provided by the present application;

[0057] Fig. 9 A flowchart of a ninth embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0058] Fig.10 A flowchart of a tenth embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0059] Fig.11 A flowchart of an eleventh embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0060] Fig.12 A flowchart of a twelfth embodiment of the energy storage system wiring fault detection method provided by the present application;

[0061] Fig.13 A flowchart of a thirteenth embodiment of the energy storage system wiring fault detection method provided by the present application;

[0062] Fig.14 A flowchart of a fourteenth embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0063] Fig.15 A flowchart of a fifteenth embodiment of a method for detecting wiring faults in an energy storage system provided by the present application;

[0064] Fig.16 A schematic diagram of the structure of the first embodiment of the energy storage system provided in this application;

[0065] Fig.17 A schematic diagram of a first embodiment of a first wiring fault provided by the present application;

[0066] Fig.18 A schematic diagram of a second embodiment of a first wiring fault provided by the present application;

[0067] Fig.19 This is a schematic diagram of a first embodiment of a second wiring fault provided by the present application.

[0068] The reference numerals in the specific implementation manner are as follows:

[0069] 10. Power supply module; 20. Power conversion module; 30. Pre-charging module; 40. Transformer; 50. Electrical equipment; 60. First switch.

[0070] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0073] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), unless otherwise clearly and specifically defined.

[0074] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0075] In the description of the embodiments of the present application, the term "and / or" is merely a term used to describe the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0076] It should be noted that, in this article, step codes such as S100, S200, etc. are used for the purpose of expressing the corresponding content more clearly and concisely, and do not constitute a substantial limitation on the sequence. When implementing the step, those skilled in the art may execute S200 first and then S100, etc., but these should all be within the scope of protection of this application.

[0077] The energy storage system is a system for storing and outputting electric energy, which can balance the supply and demand of the power grid, improve energy utilization efficiency, and deal with intermittent power supply. Among them, the energy storage system includes an energy storage battery box and a PCS all-in-one machine. The energy storage battery box is used to store and release electric energy. Specifically, it can convert electric energy into chemical energy for storage through chemical reactions, and then convert chemical energy back into electric energy for output when needed; and the PCS all-in-one machine is used to convert the electric energy output by the energy storage battery box after connecting to the energy storage battery box, such as switching between AC and DC. At the same time, the PCS all-in-one machine also provides the necessary control mechanism to ensure the stable operation of the system. In one example, the energy storage battery box may include multiple power supply modules, and the PCS all-in-one machine may include multiple power conversion modules that are paired with multiple power supply modules one by one. Each power supply module has specific capacity and performance characteristics, which are used to control each power supply module separately. After each power supply module in the energy storage battery box is connected to the power conversion module paired with it, the power supply module outputs electric energy to the power conversion module, and the power conversion module outputs it to the power-consuming equipment after conversion.

[0078] However, in energy storage systems, in order to simplify the production and maintenance process and reduce costs, designers often choose power supply modules and power conversion modules with the same specifications and appearance. It is understandable that this approach can improve the standardization and interchangeability of the system in theory, but it brings certain hidden dangers in actual deployment and operation. Since the power supply module and the power conversion module have the same specifications and appearance, there are no obvious physical distinguishing marks between the modules. At present, the connection, maintenance or upgrade between multiple power supply modules and power conversion modules requires manual work by technicians. In this way, it is easy to confuse the wiring between multiple power supply modules and multiple power conversion modules during this work, and it is easy to connect a power supply module to a power conversion module that is not paired with it.

[0079] In an energy storage system, if a power supply module is mistakenly connected to a power conversion module that is not paired with it, the energy storage system will not be able to exert the power it should have. Specifically, since the parameters and characteristics of each power supply module and power conversion module are designed to match, wiring faults will destroy this matching relationship, affecting the stability and reliability of power conversion, and ultimately causing the system output power to drop and fail to meet the expected load requirements. In addition, since different power supply modules and power conversion modules may have significant differences in capacity, voltage level and current characteristics, if a wiring fault occurs, it will lead to a significant decrease in power conversion efficiency, and may even cause the power conversion module to be damaged due to overload, which will also reduce the working power and efficiency of the energy storage system. At the same time, in addition to the problem of low work efficiency, wiring faults may also cause instability within the system, such as voltage fluctuations and increased current harmonics, which in turn affect the stability and safety of the entire energy storage system, such as electrical fires or electric shock risks, posing a threat to personnel safety, etc.

[0080] For the above-mentioned situation where wiring faults are prone to occur, a method for detecting wiring faults in an energy storage system is needed. In this regard, the applicant noted that each power conversion module has a pre-charging module, and the function of the pre-charging module is to reduce the impact of current mutations or current peaks on the system and protect the electronic components in the system. Specifically, when the power supply module turns on the power supply mode to transfer electrical energy to the power conversion module, if there is no pre-charging process, a very high current peak may be generated instantly, which will have a negative impact on the entire energy storage system.

[0081] Therefore, this application proposes a method for detecting wiring faults in an energy storage system based on a pre-charging module, which aims to effectively detect and prevent wiring faults between the power supply module and the power conversion module by utilizing the function of the pre-charging module, thereby improving the reliability and safety of the energy storage system. Specifically, the method determines whether the connection between the power supply module and the power conversion module is correct by detecting the change in the pre-charging voltage of the pre-charging module during the pre-charging process.

[0082] When the system starts, all power supply modules and power conversion modules enter the initialization state. Each power supply module starts to output electric energy, and at the same time, the pre-charging module starts pre-charging. After the pre-charging module works for a certain period of time, the system will detect the output voltage of each power supply module, and detect the pre-charging voltage of each pre-charging module for output to the power conversion module. By comparing the output voltage of the power supply module and the pre-charging voltage when the pre-charging module stops working, the system can determine whether the connection status is correct. If the pre-charging voltage is close to the output voltage of the power supply module, and the difference between the two is within the allowable range, it means that the connection is correct. If the pre-charging voltage is significantly lower than the output voltage of the power supply module, or there is a large deviation, it means that the connection is wrong. In this way, the present application proposes a method for detecting wiring faults of an energy storage system, which ensures that the energy storage system can exert its original working efficiency by detecting the connection status of the energy storage system, while also avoiding safety problems.

[0083] The energy storage system wiring fault detection method proposed in this application can be applied to the energy storage system, which can ensure that the energy storage system can play the original or preset functions, and avoid the power control error caused by the wiring fault, which affects the final achievable function or the final output power. Among them, the energy storage system can include a power generation and energy storage system, a power consumption side energy storage system and a grid-based energy storage system.

[0084] For the generation side energy storage system, the generation side energy storage system is mainly used to combine with renewable energy generation technology to form a joint system, which can smooth the output power of renewable energy, reduce the phenomenon of wind and solar power abandonment, provide system inertia support, and frequency and peak regulation, thereby improving the utilization rate of renewable energy and the stability of the power grid; at the same time, the energy storage system can also store electricity during off-peak hours to release the stored electricity during peak hours to reduce the pressure on the power grid. In some examples, it can be applied to large wind farms, photovoltaic power stations and hybrid renewable energy power stations (including wind, solar and other renewable energy sources).

[0085] For the power consumption side energy storage system, the power consumption side energy storage system is mainly used at the user end to help users achieve peak-valley arbitrage, improve power quality management and emergency backup power supply. This type of system can be applied to various scenarios, from large industrial and commercial users to residential users, to special scenarios such as communication base stations, UPS backup power, and island microgrids. Large industrial and commercial users can include automobile manufacturers, chemical plants, data centers, shopping centers, office buildings, hotels, etc.; residential users can include solar home devices, smart homes, etc.

[0086] As for the grid-side energy storage system, the grid-side energy storage system is mainly used on the transmission and distribution side to provide intelligent load management and timely peak and frequency regulation according to the grid load conditions. In this way, the flexibility of the grid can be improved, the grid's acceptance capacity can be enhanced, and the safe, stable and efficient operation of the grid can be ensured.

[0087] In order to detect the connection status of the energy storage system to ensure that the energy storage system can exert its original working efficiency. The energy storage system wiring fault detection method proposed in this application is as follows: Fig.16 As shown, the energy storage system includes a plurality of power conversion modules, a plurality of power supply modules, and a pre-charging module connected in series between each of the power conversion modules and the power supply modules. Specifically, each of the pre-charging modules is used to output the electric energy output by a power supply module to the corresponding power conversion module so as to pre-charge the power conversion module.

[0088] In this embodiment, the power supply module can be a battery, a battery pack, or other energy storage components. The power supply module is used in this application to describe it only to express its power supply function. However, in the actual energy storage system, the power supply module can not only supply power, but also receive electric energy for energy storage. In this way, it is output to specific electrical equipment through the power conversion module or the transformer. In this way, the entire system has the functions of energy storage and power supply.

[0089] In this embodiment, the pre-charging module is used to prevent the sudden current of the power supply module from having a negative impact on the power conversion module, and in this embodiment, the power supply module is also used to detect the wiring status, and the specific method will be described later. It can be understood that the pre-charging module can be connected to the power supply module through a relay, and when the relay is turned on, the pre-charging module needs to complete the pre-charging after a certain period of time.

[0090] In this embodiment, after being connected to a paired power supply module, the multiple power conversion modules convert the electrical signals output by the power supply module, such as converting direct current to alternating current, or converting alternating current to direct current.

[0091] First, as Figure 1 and Fig.15 As shown, in some embodiments, the energy storage system wiring fault detection method may include steps S100-S300.

[0092] In this embodiment, step S100 controls the output of multiple power supply modules and controls multiple pre-charge modules for pre-charge. It can be understood that in this step, at the initial stage of system startup, each power supply module starts working and provides power to the pre-charge module, and controls multiple pre-charge modules for pre-charge. At this time, each power supply module will have an output voltage, and each pre-charge module has a pre-charge voltage. The output voltage and pre-charge voltage can be the first basic data for subsequent judgment of the connection status.

[0093] In this embodiment, step S200, the output voltage of the power supply module is obtained, and the pre-charge voltage output by the pre-charge module to the power conversion module after the pre-charge is completed is obtained. It can be understood that in this step, the output voltage of the power supply module is obtained, and the pre-charge module starts to pre-charge the power conversion module after receiving the output voltage output by the power supply module, that is, gradually increase the input voltage of the power conversion module until it reaches a stable level. After the pre-charge module has worked for a preset time, it stops working and records the voltage value (pre-charge voltage) output by the pre-charge module to the power conversion module at this time. The preset time is set according to the actual application situation to ensure that the pre-charge module has enough time to complete the pre-charge or end the pre-charge, which is convenient for subsequent judgment.

[0094] In this embodiment, step S300, according to the magnitude relationship between the output voltage and the pre-charge voltage, determines the wiring fault of the energy storage system. It can be understood that in this step, based on the data collected in step S200, that is, the output voltage of the power supply module and the pre-charge voltage when the pre-charge module stops working, the system determines whether the connection between the power supply module and the power conversion module is correct by comparing the magnitude relationship between the two voltage values. If the pre-charge voltage is close to the output voltage of the power supply module and the difference between the two is within a preset range, it is considered that the connection is correct; conversely, if the pre-charge voltage is significantly lower than the output voltage of the power supply module or there is a significant deviation, it indicates that the connection is wrong.

[0095] It can be understood that the energy storage system includes multiple power supply modules and multiple power conversion modules, and the steps of this method can be to perform wiring detection on a part of the multiple power supply modules and the multiple power conversion modules, or to perform wiring detection on all of the multiple power supply modules and the multiple power conversion modules.

[0096] Furthermore, this preset range can be determined according to the actual application scenario. In high-voltage application scenarios, since the voltage is generally large, this preset range can be set to a relatively large value; and in some relatively low-voltage application scenarios, this preset range can be set to a relatively small value.

[0097] It is understandable that in some examples, at the initial stage of system startup, each power supply module starts working and provides power to the pre-charge module. At this time, the output voltage of each power supply module is detected. At this time, it can be assumed that the output voltage of the first power supply module is 48V. Subsequently, after receiving the power provided by the power supply module, the pre-charge module begins to pre-charge the power conversion module, gradually increasing the input voltage of the power conversion module until it reaches a stable level. At this time, it can be assumed that the pre-charge voltage of the pre-charge module between the first power conversion module paired with the first power supply module is 47.5V. If the pre-charge voltage is close to the output voltage of the power supply module and the difference between the two is within a preset range (for example, ±1V), the connection is considered correct. Then the first power supply module and the first conversion module are deemed to be correctly connected.

[0098] It should be noted that when the power supply module is correctly connected to the power conversion module, the pre-charging module can smoothly transfer the electric energy of the power supply module to the power conversion module. During the pre-charging process, the output voltage of the pre-charging module will gradually approach the output voltage of the power supply module, because the main function of the pre-charging module is to smooth the voltage rise and prevent current mutations. Therefore, the pre-charging voltage when the pre-charging module stops working should be close to the output voltage of the power supply module, and the difference between the two is within a preset range. Correspondingly, when the power supply module is incorrectly connected to the power conversion module, the pre-charging module cannot work normally, which may cause the pre-charging voltage to fail to rise smoothly to a value close to the output voltage of the power supply module. Therefore, the pre-charging voltage when the pre-charging module stops working will be significantly lower than the output voltage of the power supply module, or there will be significant deviations.

[0099] In summary, the energy storage system wiring fault detection method provided in the present application aims to ensure that the energy storage system can exert its original working efficiency by detecting the connection status of the energy storage system. The method detects the output voltage of each power supply module at the initial stage of system startup, then controls the pre-charge module to stop working after a preset time, and detects the pre-charge voltage when the pre-charge module stops working, and finally judges the connection status by comparing the output voltage of the power supply module and the size relationship of the pre-charge voltage. If the pre-charge voltage is close to the output voltage of the power supply module and is within the preset range, it is considered that the connection is correct; conversely, if the pre-charge voltage is significantly lower than the output voltage of the power supply module or there is a significant deviation, it indicates a connection error. This method can not only effectively prevent system performance degradation and safety hazards caused by wiring faults, but also improve the reliability and safety of the system, simplify the maintenance process, reduce operation and maintenance costs, and ensure the efficient operation of the energy storage system.

[0100] In some embodiments, Figure 2 As shown, step S300 may include steps S311 - S312 .

[0101] In this embodiment, step S311, when the difference between the output voltage of any power supply module and the pre-charge voltage of the pre-charge module used for matching and connecting therewith is greater than the first preset difference, it is determined that the energy storage system has a first wiring fault. It is understandable that in this step, the system calculates the difference between the output voltage of each power supply module and the pre-charge voltage of the corresponding pre-charge module. If the difference between the output voltage of any power supply module and the pre-charge voltage of the pre-charge module is greater than the first preset difference, the system determines that the energy storage system has a first wiring fault.

[0102] In this embodiment, step S312, when the difference between the output voltage of each power supply module and the pre-charge voltage of the pre-charge module for matching and connecting therewith is not greater than the first preset difference, it is determined that the energy storage system is in a correctly connected state. It is understandable that in this step, the system checks the difference between the output voltage of all power supply modules and the pre-charge voltage of the corresponding pre-charge module. If the difference between the output voltage of each power supply module and the pre-charge voltage of the pre-charge module is not greater than the first preset difference, the system determines that the energy storage system is in a correctly connected state.

[0103] It should be noted that in actual applications, due to various factors (such as line loss, equipment aging, etc.), there may be a certain difference between the output voltage of the power supply module and the pre-charge voltage of the pre-charge module. In order to adapt to these actual situations, steps S311-S312 introduce a first preset difference as a threshold for judging the connection status. In this way, the system can more flexibly respond to various situations in actual applications and avoid misjudging wiring faults due to small voltage differences.

[0104] It can be understood that the first preset difference value and the preset range mentioned above express the same content.

[0105] In some embodiments, Figure 3 As shown, step S300 may include steps S321 - S322 .

[0106] In this embodiment, step S321, when it is determined that the output voltage of any power supply module is not equal to the pre-charge voltage of the pre-charge module used for matching and connecting therewith, it is determined that there is a first wiring fault in the energy storage system. It is understandable that in this step, the system will record which power supply module and pre-charge module have significant voltage differences, and generate corresponding alarm information so that technicians can check and repair them in time. In addition, the system can also automatically cut off the output of the power supply module to prevent the wrong connection from causing further damage to the system.

[0107] In this embodiment, step S322 determines that the energy storage system is in a correctly connected state when it is determined that the output voltage of each power supply module is equal to the pre-charge voltage of the pre-charge module that is paired with it. It is understandable that in this step, the system will confirm that the connection between all power supply modules and pre-charge modules is correct and allow the system to enter the normal operation mode. At the same time, the system can record the successful detection results to provide reference data for subsequent maintenance and performance evaluation.

[0108] It should be explained that in this embodiment, the preset range is 0, which is a judgment method applied in an ideal state. In an ideal case, after the output voltage of the power supply module is output to the pre-charging module, the pre-charging voltage of the pre-charging module after pre-charging is completed will be equal to the output voltage of the power supply module.

[0109] In this way, the ideal wiring situation can be determined, wiring faults can be detected in time, and corresponding measures can be taken to ensure that the energy storage system can perform at its original working efficiency.

[0110] In some embodiments, Figure 4 As shown, the energy storage system wiring fault detection method may further include steps S410-S430.

[0111] In this embodiment, step S410, in response to the numbering instruction, number multiple power supply modules and multiple pre-charging modules respectively. It can be understood that in this step, during the system initialization phase, a unique number is assigned to each power supply module and pre-charging module. For example, the power supply modules can be numbered SM1, SM2, SM3..., and the pre-charging modules can be numbered PM1, PM2, PM3... In this way, by numbering each power supply module and pre-charging module, each module can be uniquely identified, which facilitates the system to accurately identify and record the status of each module during the detection process, improves the traceability and maintainability of the system, and facilitates technicians to quickly locate and handle problems.

[0112] In addition, the corresponding instruction can be output to a wiring detection circuit or a wiring detection device to number multiple power supply modules and multiple pre-charging modules.

[0113] In this embodiment, step S420, when there is a first wiring fault in the energy storage system, the number of each power supply module and the number of the pre-charging module in the first wiring fault are determined. It can be understood that in this step, when the system detects that there is a wiring fault, by determining which specific power supply modules and pre-charging modules are in the wiring fault, for example, if the voltage difference between the power supply module SM1 and the pre-charging module PM1 exceeds the preset range, the system will record the numbers of SM1 and PM1. In this way, the problem module can be quickly located, which is convenient for subsequent repair work.

[0114] In this embodiment, step S430, the control alarm system outputs an alarm signal and indicates the number. It can be understood that in this step, the system triggers the alarm system after determining that there is a first wiring fault. The alarm system outputs an alarm signal in various forms such as sound and light alarm, screen display, and SMS notification. The alarm signal contains the number of the specific wiring fault module, for example, "there is a wiring fault in the power supply module SM1 and the pre-charging module PM1." In this way, after a wiring fault is detected, an alarm signal is output through the alarm system, and the number of the specific wiring fault module is indicated to remind technicians to deal with the problem in a timely manner.

[0115] Through steps S410-S430, the energy storage system wiring fault detection method can not only accurately detect and record wiring faults, but also promptly notify technicians through the alarm system and indicate the number of the specific wiring fault module. The maintainability and response speed of the system are improved, ensuring the safe and stable operation of the energy storage system. Finally, the impact of wiring faults on the system is reduced, ensuring that the energy storage system can exert its original working efficiency.

[0116] In some embodiments, each of the power supply modules has a positive output interface and a negative output interface, and each of the pre-charging modules has a positive input interface and a negative input interface, the positive output interface is used to connect to the positive input interface, and the negative output interface is used to connect to the negative input interface.

[0117] In this embodiment, if Fig.17 As shown, the first wiring fault indicates that in the energy storage system, the positive output interface of at least one of the power supply modules is connected to the positive input interface or the negative input interface of one of the two power conversion modules, and the negative output interface of the power supply module is connected to the positive input interface or the negative input interface of the other of the two power conversion modules. It can be understood that the first wiring fault in this embodiment refers to that the positive output interface and the negative output interface of at least one power supply module are connected to the input interfaces of different power conversion modules, rather than the corresponding interfaces of the same pre-charging module. In some examples, the first wiring fault may be that the positive output interface of the power supply module SM1 is mistakenly connected to the positive input interface of the pre-charging module PM1, and its negative output interface is mistakenly connected to the negative input interface of the pre-charging module PM2. Alternatively, the first wiring fault may also be that the positive output interface of the power supply module SM1 is mistakenly connected to the negative input interface of the pre-charging module PM1, and its negative output interface is mistakenly connected to the positive input interface of the pre-charging module PM2.

[0118] In this embodiment, if Fig.18As shown, the first wiring fault indicates that in the energy storage system, the positive output interface of at least one power supply module is connected to the negative input interface of a pre-charging module, and the negative output interface of the power supply module is connected to the positive input interface of the pre-charging module. In some examples, the first wiring fault may be that the positive output interface of the power supply module SM1 is connected to the negative input interface of the pre-charging module PM1, and the negative output interface of the power supply module SM1 is connected to the positive input interface of the pre-charging module PM1.

[0119] It should be noted that the power supply module SM1 in the above example is a power supply module paired with the pre-charging module PM1; the pre-charging module PM2 is a pre-charging module paired with the power supply module SM2.

[0120] It is understandable that, under normal circumstances, the positive output interface of each power supply module should be connected to the positive input interface of a pre-charge module, and the negative output interface should be connected to the negative input interface of the same pre-charge module. For example, the positive output interface of the power supply module SM1 is connected to the positive input interface of the pre-charge module PM1, and the negative output interface is connected to the negative input interface of the pre-charge module PM1.

[0121] By clarifying the definition and specific circumstances of the first wiring fault, we can better understand the impact of wiring faults on the system, and timely discover and handle these problems through the energy storage system wiring fault detection method to ensure the safe and stable operation of the energy storage system.

[0122] In general, when the first wiring fault occurs, pre-charging cannot be achieved between the corresponding power supply module and the power conversion module in the energy storage system.

[0123] In one embodiment, if Figure 5 As shown, before step S100, the energy storage system wiring fault detection method may further include steps S510-S530.

[0124] In this embodiment, step S510, the insulation resistance value between the positive and negative poles of each power supply module is detected. It can be understood that in this step, before the system is started, an insulation resistance tester or a built-in detection circuit is used to measure the insulation resistance value between the positive and negative poles of each power supply module, and the insulation resistance value of each power supply module is recorded for subsequent judgment and processing. In this way, by detecting the insulation resistance value between the positive and negative poles of each power supply module, the insulation performance of the power supply module can be evaluated to ensure that it is in a good insulation state before startup.

[0125] In this embodiment, in step S520, when the insulation resistance of each power supply module is greater than a preset resistance value, multiple power supply modules are controlled to start working. Optionally, in this step, if the insulation resistance values ​​of all power supply modules are greater than a preset resistance value (for example, 1MΩ), the system controls all power supply modules to start working.

[0126] In this embodiment, in step S530, when the insulation resistance of any power supply module is not greater than the preset resistance value, multiple power supply modules are controlled to remain in standby state or enter standby state. It can be understood that in this step, if it is detected that the insulation resistance value of any power supply module is not greater than the preset resistance value, the system will control all power supply modules to remain in standby state or enter standby state to prevent potential electrical failures. At this time, the system can generate corresponding alarm information to prompt technicians to check and repair the power supply module with poor insulation.

[0127] In this way, it is ensured that all power supply modules are in good insulation condition before startup to avoid electrical failures caused by poor insulation.

[0128] In addition, in actual situations, in addition to the first wiring fault, there is also a second wiring fault. If the number of the power supply module is the same as the number of the pre-charging module of the paired power conversion module, then the second wiring fault indicates that in the energy storage system, there is a positive output interface and a negative output interface of the power supply module numbered N connected to the positive input interface and the negative input interface of the pre-charging module numbered M, and N and M are not the same. For example, the positive output interface and the negative output interface of the power supply module SM1 are mistakenly connected to the positive input interface and the negative input interface of the pre-charging module PM2.

[0129] Pre-charging can still be achieved even if the second wiring fault occurs. The specific reason is that the positive and negative output terminals of the power supply module are both connected to the positive and negative input terminals of a pre-charging module. In this way, the pre-charging module will still perform pre-charging. For example, even if the power supply module SM1 is mistakenly connected to the pre-charging module PM2, the pre-charging module PM2 can still complete the pre-charging, and the pre-charging voltage may be close to the output voltage of the power supply module SM1. However, since the control logic of the corresponding power conversion module is set for the paired power supply module, even if the pre-charging is successful, it will affect the final working efficiency. The power supply module SM1 is mistakenly connected to the pre-charging module PM2, and the control logic of the power conversion module PC2 is set for the power supply module SM2. This mismatch will cause the power conversion module PC2 to be unable to correctly process the electrical energy from the power supply module SM1.

[0130] Therefore, if Figure 6 and Fig.15As shown, in some embodiments, in order to simultaneously detect the first wiring fault and the second wiring fault to ensure that the energy storage system can exert its original working efficiency, step S100 may further include step S111.

[0131] In this embodiment, step S111 controls the multiple power supply modules to supply power to the pre-charging modules connected thereto according to a preset power supply sequence, and controls the multiple pre-charging modules to work in sequence according to the power supply sequence and then stop working after a preset time. It can be understood that in this step, a power supply sequence is set, such as 1, 2, 3. Then, in accordance with the set sequence, each power supply module is controlled in turn to supply power to the pre-charging modules connected thereto. After receiving electric energy, each pre-charging module starts the pre-charging process and stops working after a preset time. In one example, the power supply module SM1 supplies power first, the pre-charging module PM1 starts pre-charging and stops after a preset time; then the power supply module SM2 supplies power, the pre-charging module PM2 starts pre-charging and stops after a preset time, and so on. In this way, through sequential control, it is ensured that the connection status of each power supply module and the pre-charging module can be detected separately to avoid mutual interference when multiple modules work at the same time.

[0132] It is understandable that, based on the above-mentioned start-up sequence and pre-charging sequence, the pre-charging voltage to be output to the power conversion module by each pre-charging module when it stops working is detected. In this way, when each pre-charging module stops working, a voltage detection device or a built-in detection circuit is used to measure and record the pre-charging voltage output by the pre-charging module to the power conversion module, providing data support for subsequent connection status judgment.

[0133] It should be noted that the energy storage system includes multiple power supply modules and multiple power conversion modules, and the steps of this method can be to perform wiring detection on a part of the multiple power supply modules and multiple power conversion modules, or to perform wiring detection on all of the multiple power supply modules and multiple power conversion modules.

[0134] For step S111, Figure 7 As shown, step S300 may further include step S331 and step S332.

[0135] In this embodiment, in step S331, when the output voltage of the corresponding power supply module in each sequence and the pre-charging voltage of the pre-charging module used for paired connection therewith are not greater than a first preset difference, it is determined that the working power supply module is correctly connected to the pre-charging module connected thereto, and it is determined that the energy storage system is in a correctly connected state.

[0136] In this embodiment, in step S332, when the output voltage of the corresponding power supply module and the pre-charge voltage of the pre-charge module connected thereto in any sequence are greater than the first preset difference, it is determined that the working power supply module is incorrectly connected to the pre-charge module connected thereto, and it is determined that there is a wiring fault in the energy storage system. It is understandable that this wiring fault encompasses all forms of wiring faults, including the first wiring fault and the second wiring fault.

[0137] It can be understood that the first preset difference can be determined according to the actual application scenario. In high-voltage application scenarios, since the voltage is generally large, the first preset difference can be set to a relatively large value; and in some relatively low-voltage application scenarios, the first preset difference can be set to a relatively small value.

[0138] Let's further explain a scenario. An energy storage system includes three power supply modules (SM1, SM2, SM3), three pre-charging modules (PM1, PM2, PM3) and three power conversion modules (PC1, PC2, PC3). The output voltage of each power supply module is 10000V. At this time, the positive output interface of SM1 is mistakenly connected to the negative input interface of PM1, and the negative output interface of SM1 is mistakenly connected to the positive input interface of PM1, resulting in a first wiring fault. In addition, the positive output interface and negative output interface of SM2 are mistakenly connected to the positive input interface and negative input interface of PM3; the positive output interface and negative output interface of SM3 are mistakenly connected to the positive input interface and negative input interface of PM2, resulting in a second wiring fault. Then, the power supply order is SM1, SM2, SM3; the working order of the pre-charging module is PM1, PM2, PM3. Then, when the order is 1, SM1 and PM1 start working. At this time, since PM1 and SM1 correspond to the first wiring fault, PM1 pre-charge failure is detected in this order. When the order is 2, SM2 and PM2 start working. At this time, since the positive output interface and negative output interface of SM2 are connected to the positive input interface and negative input interface of PM3, and since the positive input interface and negative input interface of PM2 have no power input, there is no pre-charge voltage, and it is judged as a wiring fault. The same applies when the order is 3.

[0139] In summary, through these steps, the system can effectively detect and prevent the first wiring fault and the second wiring fault, that is, all types of wiring faults can be detected by the present energy storage system wiring fault detection method, ensuring that the energy storage system can exert its original working efficiency and improve the safety and reliability of the system. For example, if the power supply sequence is 1, 2, 3, and the working sequence of the pre-charging module is also 1, 2, 3, if the difference is too large in a certain sequence, it means that the pre-charging module in the corresponding sequence is not correctly connected to the pre-charging module of the paired power conversion module, and the specific wiring fault can be the first wiring fault or the second wiring fault.

[0140] In some embodiments, Fig.15 As shown, detection and correction can also be performed according to the following method: find out the number of power supply modules and power conversion modules with wiring faults in the energy storage system. When the number is two, the control logic of the two power conversion modules can be directly replaced, which means that the power conversion module of the original power supply module SM1 and the pre-charging module PM1 are paired. After the replacement, the power supply module SM1 can be changed to be paired with the power conversion module of the pre-charging module PM2. In this way, it can be corrected directly. If there is still a wiring fault after this correction, it means that the first wiring fault has occurred. In addition, if the number is greater than 2, it can be corrected first and then an error is reported, or the correction step can be skipped and an error is reported directly.

[0141] In some embodiments, in response to the numbering instruction, the plurality of power supply modules and the plurality of pre-charging modules may be numbered in sequence, and the number of each power supply module is the same as the number of the pre-charging module used for pairing with it. And after determining that the energy storage system has a wiring fault, such as Figure 8 As shown, steps S3321-S3324 may also be included for correction.

[0142] In this embodiment, step S3321 records the number of the power supply module with the wrong connection and the number of the pre-charge module connected to it.

[0143] In this embodiment, step S3322, based on the correspondence between the numbers of the power supply modules and the pre-charge modules, the control logic of the pre-charge module to be connected and calibrated with the power supply module is re-determined.

[0144] In this embodiment, step S3323 controls multiple power supply modules to supply power to the pre-charge modules to be connected and calibrated respectively.

[0145] In this embodiment, step S3324, when the difference between the output voltage of each pre-charged module to be connected and corrected and the corresponding power supply module is not greater than the first preset difference, it is determined that the correction of each erroneously connected power supply module and its pre-charged module to be connected and corrected is completed.

[0146] In one example, for example, if the power supply module SM1 is connected to the pre-charging module PM2 and the power supply module SM2 is connected to the pre-charging module PM1, the system will mark the pre-charging failure of the pre-charging modules PM1 and PM2, and a wiring fault occurs. Then the control logic of the pre-charging modules PM1 and PM2 can be replaced. That is to say, after replacing the control logic, the pre-charging module PM1 and the power supply module SM2 are paired with each other, and the pre-charging module PM2 and the power supply module SM1 are paired with each other. In this way, the second wiring fault can be corrected. By automatically detecting and correcting the wiring fault, it is ensured that each power supply module and the pre-charging module are correctly connected, thereby avoiding system performance degradation and safety hazards caused by wiring faults.

[0147] In actual applications, the energy storage system may have more complex wiring faults, such as the first wiring fault and the second wiring fault occurring at the same time. Therefore, it is necessary to number the faulty power supply module and pre-charging module and record the corresponding numbers of the error status to facilitate subsequent processing.

[0148] In some embodiments, similarly, in response to the numbering instruction, the plurality of power supply modules and the plurality of pre-charged modules may be numbered in sequence, and the number of each power supply module is the same as the number of the pre-charged module used for pairing and connecting with it. Fig. 9 As shown, after determining that the energy storage system has a wiring fault, steps S3325-S3328 may be specifically included to alarm when the energy storage system still has a wiring fault after correction. It is understandable that since the first wiring fault cannot be corrected by replacing the control logic, only the corresponding error position can be identified, and then the position or quantity and other data are indicated by an alarm signal.

[0149] In this embodiment, step S3325 records the serial number of the incorrectly connected power supply module and the pre-charged module and serial number connected thereto.

[0150] In this embodiment, step S3326, based on the correspondence between the numbers of the power supply modules and the numbers of the pre-charge modules, the control logic of the pre-charge module to be connected and calibrated with the power supply module is re-determined.

[0151] In this embodiment, step S3327 controls multiple power supply modules to respectively supply power to the pre-charge modules to be connected and calibrated therewith.

[0152] In this embodiment, in step S3328, when the difference between the output voltage of any pre-charging module to be connected and corrected and the corresponding power supply module is greater than the first preset difference, it is determined that there is a first wiring fault in the energy storage system, and an alarm message is output, the alarm message including the corresponding numbers of the power supply module and the pre-charging module to be checked.

[0153] It is understandable that step S3327 can correct the second wiring fault by replacing the corresponding control logic. If the energy storage system becomes correctly connected after correction, then the correction is successful and no alarm is required. If there is still a wiring fault in the energy storage system after correction, then the wiring fault at this time is the first wiring fault. At this time, the corresponding alarm signal can only be generated through step S3328 to instruct the operator to make manual corrections. In this way, by automatically detecting and correcting wiring faults, it is ensured that each power supply module and pre-charging module are connected correctly, avoiding system performance degradation and safety hazards caused by wiring faults. At the same time, by generating alarm information, the operator is promptly prompted to check and repair the first wiring fault to avoid electrical faults such as short circuits and overloads.

[0154] In summary, through these steps, the system can effectively detect and prevent the first wiring fault and the second wiring fault, ensure that the energy storage system can exert its original working efficiency, and improve the safety and reliability of the system.

[0155] It should be noted that steps S3321-S3324 and steps S3325-S3328 are parallel steps and are explained in two embodiments.

[0156] In some embodiments, Fig.10 As shown, step S100 may further include steps S121-S123.

[0157] In this embodiment, step S121, in response to the numbering instruction, multiple power supply modules and multiple pre-filling modules are numbered in sequence; wherein, the number of each power supply module is the same as the number of the pre-filling module used to pair with it. It can be understood that in this step, by numbering each power supply module and pre-filling module, it is ensured that the correspondence between each power supply module and the pre-filling module is clear, which is convenient for subsequent detection and control. In one example, a unique number is assigned to each power supply module and pre-filling module, for example, power supply modules SM1, SM2, SM3, pre-filling modules PM1, PM2, PM3, ensuring that the number of each power supply module is the same as the number of the pre-filling module used to pair with it, for example, SM1 is connected to PM1, SM2 is connected to PM2, and SM3 is connected to PM3. In this way, the traceability and maintainability of the system are improved, and the system is convenient for recording and reporting the status of each module during the detection process, thereby improving the accuracy and efficiency of the detection.

[0158] In this embodiment, step S122, the output of the power supply modules is controlled one by one. In this step, by controlling the power supply modules to work one by one, it is ensured that the connection status of each power supply module can be detected separately, and mutual interference when multiple modules work at the same time is avoided. In one example, SM1 is controlled to work first, then SM2 is controlled to work, and finally SM3 is controlled to work. In this way, the pertinence, accuracy and reliability of the detection can be improved.

[0159] In this embodiment, step S123, when each of the power supply modules outputs, multiple pre-charge modules are controlled to work in sequence for a preset time and then stop working. In this step, for example, when SM1 is working, PM1, PM2, and PM3 are controlled to work in sequence.

[0160] In this embodiment, for steps S121 to S123, as Fig.11 As shown, step S300 includes steps S341 to S343.

[0161] In this embodiment, step S341, when the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than the first preset difference, and the number of the pre-charge module is different from the number of the working power supply module, it is determined that the energy storage system has a second wiring fault. It is understandable that if a pre-charge module is successfully pre-charged, but its number is different from the number of the working power supply module, it is determined that a second wiring fault exists. For example, when SM1 is working, PM3 is pre-charged successfully, but the number is different, and it is determined that a second wiring fault exists.

[0162] In this embodiment, step S342, when the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than the first preset difference, and the number of the pre-charge module is the same as the number of the working power supply module, it is determined that the energy storage system is in a correctly connected state. It is understandable that if a pre-charge module is successfully pre-charged (the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than the first preset difference), and its number is the same as the number of the working power supply module, it is determined that the system is in a correctly connected state. In one example, when SM1 is working, PM1 is successfully pre-charged, the numbers are the same, and it is determined that the system is in a correctly connected state.

[0163] In this embodiment, in step S343, after multiple pre-charging modules complete their work in sequence, if the difference between the pre-charging voltage of the multiple pre-charging modules and the output voltage of the power supply module connected thereto is greater than the first preset difference, it is determined that the energy storage system has a first wiring fault. It is understandable that when SM1 is working, PM1, PM2, and PM3 are controlled to work in sequence. If all pre-charging modules fail to pre-charge, it is determined that there is a first wiring fault. In some examples, when SM1 is working, PM1, PM2, and PM3 all fail to pre-charge, and it is determined that there is a first wiring fault.

[0164] It should be noted that the energy storage system includes multiple power supply modules and multiple power conversion modules, and the steps of this method can be to perform wiring detection on a part of the multiple power supply modules and multiple power conversion modules, or to perform wiring detection on all of the multiple power supply modules and multiple power conversion modules.

[0165] In addition, the successful pre-charging in this embodiment, for example, successful pre-charging of the pre-charging module PM4, means that the pre-charging module PM4 is correctly connected to the power supply module SM4, so that the difference between the pre-charging voltage of the pre-charging module PM4 and the output voltage of the power supply module SM4 is within the preset value.

[0166] It is understandable that each pre-charge module has a switch, through which the pre-charge module is connected to the power supply module. Only when the switch is closed can the power supply module be transmitted to the pre-charge module. In this way, multiple pre-charge modules can be controlled to be turned on or work in sequence through the switch. The switch can be a diode switch, a MOS switch, or a relay.

[0167] In some examples, step S121-step S123 and step S341-step S343 mean that when SM3 is turned on, PM1, PM2, PM3... are detected one by one until one of them is pre-charged successfully. If PM3 is not pre-charged successfully, there is a second wiring fault. If PM3 is pre-charged successfully, the connection is correct. If there is no pre-charged module that is pre-charged successfully after detecting PM1, PM2, PM3... one by one, there is a first wiring fault.

[0168] In this way, steps S341-S343 ensure that the connection status of the energy storage system before startup is correct, improve the safety and reliability of the system, and reduce performance degradation and safety hazards caused by wiring faults.

[0169] Steps S121-S123 and steps S341-S343 are to control the operation of the power supply modules one by one and detect the pre-charge status and number of the pre-charge modules one by one to determine the connection status, and through the number and pre-charge status, the first wiring fault and the second wiring fault can be detected at the same time.

[0170] The difference between steps S121-S123 and steps S341-S343 compared to steps S111-S112 and steps S331-S343 is that the latter focuses on turning on multiple power supply modules one by one and turning on multiple pre-charged modules paired with them one by one according to the order in which the power supply modules are turned on, and finally determining which pre-charged modules have failed to be pre-charged, so as to find the corresponding wiring fault. The former focuses on turning on a power supply module and then turning on the pre-charged modules one by one until one of the pre-charged modules is pre-charged or no pre-charged module is pre-charged, so as to find the corresponding wiring fault.

[0171] In one embodiment, if Fig.12 As shown, step S341 may also include steps S3411-S3412.

[0172] In this embodiment, step S3411, when the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than the first preset difference, and the number of the pre-charge module is different from the number of the working power supply module, the number of the power supply module and the number of the pre-charge module are recorded. In this step, if a pre-charge module is successfully pre-charged (the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than the first preset difference), but its number is different from the number of the working power supply module, the numbers of the two modules are recorded. For example, when SM1 is working, PM3 is pre-charged successfully, and the numbers of SM1 and PM3 are recorded.

[0173] In this embodiment, step S3412, based on the correspondence between the number of the power supply module and the number of the pre-filling module, redetermine the control logic of the pre-filling module to be connected and corrected with the power supply module. In this step, based on the recorded wiring fault information, redetermine the pre-filling module to which each power supply module should be connected. For example, if the power supply module SM1 is connected to the pre-filling module PM2, and the power supply module SM2 is connected to the pre-filling module PM1, then the system will mark the pre-filling failure of the pre-filling module PM1 and the pre-filling module PM2, and a wiring fault occurs, then the control logic of the pre-filling module PM1 and the pre-filling module PM2 can be replaced, that is, after replacing the control logic, the pre-filling module PM1 and the power supply module SM2 are paired with each other, and the pre-filling module PM2 and the power supply module SM1 are paired with each other, so that the second wiring fault can be corrected, and the connection of each power supply module and the pre-filling module can be ensured to be correct by automatically detecting and correcting the wiring fault, so as to avoid system performance degradation and safety hazards caused by wiring faults.

[0174] In this way, through steps S3411-S3412, the corresponding power supply module and the pre-charge module number can be recorded when a wiring fault occurs, and the control logic can be adjusted. The second wiring fault can be discovered and handled in time, and electrical faults caused by wiring faults, such as short circuits and leakage, can be avoided, thereby protecting the safety of the system and operators.

[0175] In one embodiment, step S100 may include step S131 and step S132. Fig.13 shown.

[0176] In this embodiment, step S131, in response to the numbering instruction, multiple power supply modules and multiple pre-filled modules are numbered in sequence, and the number of each power supply module is the same as the number of the pre-filled module used to be paired with it. In this step, a unique number is assigned to each power supply module and pre-filled module, for example, power supply modules SM1, SM2, SM3, pre-filled modules PM1, PM2, PM3. And ensure that the number of each power supply module is the same as the number of the pre-filled module paired with it, for example, SM1 is connected to PM1, SM2 is connected to PM2, and SM3 is connected to PM3.

[0177] In this embodiment, step S132 controls multiple power supply modules to supply power to the pre-charging modules in sequence, and controls multiple pre-charging modules to work simultaneously for a preset time and then stop working. In this step, each power supply module is controlled to supply power in sequence according to the order of numbering. For example, SM1 is controlled to supply power first, then SM2 is controlled to supply power, and finally SM3 is controlled to supply power. When each power supply module is supplying power, multiple pre-charging modules are in a startup state, that is, the relays of multiple pre-charging modules are in a conducting state. In this way, when each power supply module is supplying power, it can be determined whether any pre-charging of the pre-charging module is completed.

[0178] For steps S131 and S132, Fig.14 As shown, step S300 may include steps S351 to S354.

[0179] In this embodiment, step S351, respectively records the number of the pre-charging module and the number of the power supply module when the pre-charging is successful, and the number of the pre-charging module and the number of the power supply module when the pre-charging is unsuccessful, wherein the successful pre-charging indicates that the difference between the pre-charging voltage of the pre-charging module and the output voltage of the power supply module is not greater than the first preset difference, and the unsuccessful pre-charging indicates that the difference between the pre-charging voltage of the pre-charging module and the output voltage of the power supply module is greater than the first preset difference. In this step, when each power supply module is powered, the number of the pre-charging module and the number of the power supply module that are successful and unsuccessful in pre-charging are recorded. For example, when SM1 is powered, PM1 is pre-charged successfully, and SM1 and PM1 are recorded; when SM3 is powered, PM5 is pre-charged successfully, and SM3 and PM5 are recorded; when SM2 is powered, no pre-charging module is pre-charged successfully, then SM2 and PM2 paired with SM2 are recorded.

[0180] In this embodiment, step S352, when the numbers of the pre-charging modules and the power supply modules when the pre-charging fails are recorded, it is determined that the pre-charging modules and the power supply modules that failed to pre-charge are connected incorrectly, and it is determined that the energy storage system has a first wiring fault. In this step, if the numbers of the pre-charging modules and the power supply modules that failed to pre-charge are recorded, it is determined that these modules are connected incorrectly and the system has a first wiring fault. In some examples, when the power supply module SM1 is supplying power, if no pre-charging module is successfully pre-charged, the pre-charging failure of SM1 and PM1 is recorded, which can be used to finally indicate to the corresponding operator.

[0181] It should be noted that for the first wiring failure, if all cables are connected, two or more pre-charging modules will not be pre-charged successfully, and therefore two or more power supply modules will not be powered successfully. At this time, all pre-charging modules that have not been pre-charged successfully or power supply modules that have not been powered successfully will be recorded and eventually indicated to the operator.

[0182] In this embodiment, in step S353, when the number of the pre-charging module recorded when the pre-charging is successful does not correspond to the number of the power supply module, it is determined that the pre-charging module and the power supply module corresponding to the number are connected incorrectly, and it is determined that the energy storage system has a second wiring fault. In some examples, when the pre-charging module PM5 is pre-charged successfully when the power supply module SM3 is recorded, since the numbers of the two do not correspond, it is determined that the connection between SM3 and PM5 is incorrect, and the system has a second wiring fault.

[0183] In this embodiment, in step S354, when the number of the pre-charging module and the number of the power supply module in each record of successful pre-charging correspond to each other, it is determined that the energy storage system is in a correctly connected state.

[0184] It can be understood that the difference between step S131-step S132 and step S351-step S354 compared to step S121-step S123 and step S341-step S343 is that the former turns on all pre-charge modules at the same time, and when turning on the power supply modules one by one, determines the corresponding connection status when each power supply module is turned on. The latter turns on the pre-charge modules one by one, stops after the pre-charge is successful, and judges the corresponding connection status when each power supply module is turned on. Therefore, the former can quickly detect the connection status of each power supply module, simplifying the detection process and improving the detection efficiency.

[0185] It should be noted that the energy storage system includes multiple power supply modules and multiple power conversion modules, and the steps of this method can be to perform wiring detection on a part of the multiple power supply modules and multiple power conversion modules, or to perform wiring detection on all of the multiple power supply modules and multiple power conversion modules.

[0186] In some embodiments, different connection modes are used for the first wiring fault and the second wiring fault mentioned above.

[0187] It can be understood that each of the power supply modules has a positive output interface and a negative output interface, and each of the pre-charging modules has a positive input interface and a negative input interface, the positive output interface is used to connect to the negative input interface, and the negative output interface is used to connect to the positive input interface.

[0188] like Fig.17 As shown, the first wiring fault may indicate that in the energy storage system, the positive output interface of at least one of the power supply modules is connected to the positive input interface or the negative input interface of one of the two power conversion modules, and the negative output interface of the power supply module is connected to the positive input interface or the negative input interface of the other of the two power conversion modules.

[0189] like Fig.18 As shown, the first wiring fault may also indicate that in the energy storage system, the positive output interface of at least one power supply module is connected to the negative input interface of a pre-charging module, and the negative output interface of the power supply module is connected to the positive input interface of the pre-charging module.

[0190] like Fig.19 As shown, the second wiring fault may indicate that in the energy storage system, there is a positive output interface of a power supply module numbered N connected to a positive input interface of a pre-charging module numbered M, and a negative output interface of a power supply module numbered N connected to a negative input interface of a pre-charging module numbered M, and the power supply module numbered N is not paired with the pre-charging module numbered M.

[0191] In some embodiments, before the energy storage system wiring fault detection method starts detection, it also includes steps S610-S630.

[0192] In this embodiment, step S610, the insulation resistance value between the positive and negative poles of each power supply module is detected. In this step, before the system is started, an insulation resistance tester or a built-in detection circuit is used to measure the insulation resistance value between the positive and negative poles of each power supply module, and the insulation resistance value of each power supply module is recorded for subsequent judgment and processing. In this way, by detecting the insulation resistance value between the positive and negative poles of each power supply module, the insulation performance of the power supply module can be evaluated to ensure that it is in a good insulation state before startup.

[0193] In this embodiment, in step S620, when the insulation resistance of each power supply module is greater than a preset resistance value, the plurality of power supply modules are controlled to start working. Optionally, in this step, if the insulation resistance values ​​of all power supply modules are greater than a preset resistance value (for example, 1 MΩ), the system controls all power supply modules to start working.

[0194] In this embodiment, step S630, when the insulation resistance of any of the power supply modules is not greater than the preset resistance value, control the multiple power supply modules to remain in standby state or enter standby state. In this step, if it is detected that the insulation resistance value of any power supply module is not greater than the preset resistance value, the system will control all power supply modules to remain in standby state or enter standby state to prevent potential electrical failures. At this time, the system can generate corresponding alarm information to prompt technicians to check and repair the power supply module with poor insulation.

[0195] In this way, it is ensured that all power supply modules are in good insulation condition before startup to avoid electrical failures caused by poor insulation.

[0196] In a second aspect, the present application further proposes an energy storage system wiring fault detection device, the energy storage system wiring fault detection device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor; the computer program is configured to implement an energy storage system wiring fault detection method as described in any one of the above embodiments.

[0197] It should be noted that the energy storage system wiring fault detection device provided by the present application adopts the energy storage system wiring fault detection method in the above embodiment, which can detect the connection status of the energy storage system to ensure that the energy storage system can play its original working efficiency. Compared with the prior art, the beneficial effects of the energy storage system wiring fault detection device provided by the present application are the same as the beneficial effects of the energy storage system wiring fault detection method provided by the above embodiment, and the other technical features of the energy storage system wiring fault detection device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0198] It can be understood that the energy storage system wiring fault detection device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc.

[0199] In addition, the energy storage system wiring fault detection device may include a processing device (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) or a program loaded from a storage device to a random access memory (RAM). In the RAM, various programs and data required for the operation of the energy storage system wiring fault detection device are also stored. The processing device, ROM, and RAM are connected to each other through a bus. The input / output (I / O) interface is also connected to the bus. Generally, the following systems can be connected to the I / O interface: input devices including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices including, for example, a magnetic tape, a hard disk, etc.; and a communication device. It can be understood that although there are various systems of energy storage system wiring fault detection devices, it should be understood that it is not required to implement or have all the systems shown, and more or less systems can be implemented or have instead.

[0200] In this way, through the automated execution of a computer program, the energy storage system wiring fault detection device can efficiently and accurately detect the connection status of the power supply module and the pre-charging module, thereby reducing human intervention and improving detection efficiency.

[0201] Thirdly, Fig.16 As shown, the present application also provides an energy storage system, which includes multiple power supply modules 10, multiple power conversion modules 20 and the energy storage system wiring fault detection device as described above; wherein, the multiple power supply modules 10 and the multiple power conversion modules 20 are paired one by one; the power conversion module 20 has a pre-charging module 30, and the power supply module 10 is connected to the power conversion module 20 through the pre-charging module 30; the energy storage system wiring fault detection device is used to detect the connection status between the multiple power supply modules 10 and the multiple power conversion modules 20, and control the energy storage system to perform corresponding work according to the connection status.

[0202] In this embodiment, each power supply module 10 is responsible for providing power. The number and capacity of the power supply modules 10 can be configured according to system requirements to meet different application scenarios.

[0203] In this embodiment, each power conversion module 20 is responsible for converting the power provided by the power supply module 10 into electric energy suitable for system use. Each power conversion module 20 may include components such as a DC / DC converter and an inverter to ensure efficient conversion and transmission of power.

[0204] In this embodiment, the pre-charging module 30 is a part of the power conversion module 20, and is used to establish a stable connection between the power supply module 10 and the power conversion module 20. The pre-charging module 30 ensures that the capacitor and other components of the power conversion module 20 can be charged smoothly by gradually increasing the voltage to avoid current shock and damage.

[0205] In this embodiment, the energy storage system wiring fault detection device is responsible for detecting the connection status between the power supply module 10 and the power conversion module 20. By executing the above energy storage system wiring fault detection method, the energy storage system wiring fault detection device can accurately determine the connection status of each power supply module 10 and the pre-charging module 30 to ensure the normal operation of the system.

[0206] It should be noted that the energy storage system provided by the present application, using the energy storage system wiring fault detection device in the above embodiment, can detect the connection status of the energy storage system to ensure that the energy storage system can exert its original working efficiency. Compared with the prior art, the beneficial effects of the energy storage system provided by the present application are the same as the beneficial effects of the energy storage system wiring fault detection device provided in the above embodiment, and other technical features of the energy storage system are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0207] In summary, the energy storage system wiring fault detection device can detect and monitor the connection status between the power supply module 10 and the power conversion module 20 in real time, and ensure that the connection between each power supply module 10 and the pre-charging module 30 is correct. Specifically, the energy storage system wiring fault detection device can timely discover and handle the first wiring fault and the second wiring fault through automated detection methods, such as numbering management, controlling the power supply of the power supply module 10 one by one, and recording the pre-charging status. It ensures that the connection status of the system is always in the best state, avoiding electrical failures and performance degradation caused by wiring faults. At the same time, it enables the system to operate efficiently according to the design parameters, maximize the functions of energy storage and power supply, and ensure that the energy storage system can continuously and stably exert its original working efficiency.

[0208] In this embodiment, if Fig.16 As shown, the energy storage system further includes a transformer 40. It is understandable that the transformer 40 is used to transform the electric energy output by the power conversion module 20 to adapt to the voltage requirements of different electrical equipment 50 and ensure the effective transmission and utilization of electric energy.

[0209] In this embodiment, the output end of each power conversion module 20 is connected to the input end of the transformer 40 through the first switch 60, and the output end of the transformer 40 is used to connect the power device 50. It can be understood that this ensures that the electric energy output by each power conversion module 20 can be transformed by the transformer 40 and finally transmitted to the power device 50 at a suitable voltage, thereby improving the flexibility and adaptability of the system.

[0210] In this embodiment, the first switch is used to close when it is determined that the power supply module is connected to the power conversion module connected thereto, so that the power conversion module converts the electric energy output by the power supply module and outputs it to the transformer. And the transformer is used to transform the electric energy and output the electric energy to the power-consuming device. In this way, the system can efficiently and safely transmit and convert electric energy, ensure the power quality and transmission efficiency of each link, and finally meet the power demand of the power-consuming device 50.

[0211] It should be noted that when the power supply module is connected to a power conversion module that is not paired with it, the energy storage system wiring fault detection device can detect that the power supply module and the power conversion module are not connected correctly, so that the corresponding power conversion module cannot output electrical energy to the transformer or to the electrical equipment, thereby ensuring safety of use.

[0212] In a fourth aspect, the present application further provides an electrical device, comprising a device body and an energy storage system as described above. The output ends of the multiple power conversion modules of the energy storage system are connected to the input ends of the device body, and when the energy storage system is in a correctly connected state, it outputs electrical energy to the device body, and when there is a wiring fault in the energy storage system, the corresponding power conversion module is controlled to stop outputting electrical energy to the device body.

[0213] It should be noted that the electrical equipment provided in this application, using the energy storage system in the above embodiment, can detect the connection status of the energy storage system to ensure that the energy storage system can exert its original working efficiency. Compared with the prior art, the beneficial effects of the electrical equipment provided in this application are the same as the beneficial effects of the energy storage system provided in the above embodiment, and the other technical features in the electrical equipment are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0214] In some applications or examples, power-consuming devices may include home energy management systems, which integrate solar photovoltaic panels, energy storage batteries, and intelligent control systems to manage and optimize home energy use. Power-consuming devices may include industrial production lines, where energy storage systems can provide backup power to ensure production continuity, especially during periods of unstable power supply or peak hours. Power-consuming devices may include electric vehicle charging stations, where energy storage systems can smooth power demand and ensure the normal operation of charging stations, especially during peak hours. Power-consuming devices may include medical equipment, which requires a continuous and stable power supply, especially in operating rooms and intensive care units, where the stability of the power supply is critical.

[0215] It is understandable that the specific form of the electrical equipment is not limited here. What is important is that the electrical equipment adopts the energy storage system wiring fault detection method proposed in this application to detect the wiring status in real time and the automatic correction function, ensuring that the connection status of the system is always in the best state, avoiding electrical failures and performance degradation caused by wiring faults.

[0216] The above description is only an exemplary embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for detecting wiring faults in an energy storage system, characterized in that: The energy storage system includes a plurality of power conversion modules, a plurality of power supply modules, and a pre-charging module connected in series between each of the power conversion modules and the power supply modules. The energy storage system wiring fault detection method includes: In response to the numbering instruction, the plurality of power supply modules and the plurality of pre-charged modules are numbered in sequence, wherein the number of each power supply module is the same as the number of the pre-charged module for pairing and connecting therewith; Control multiple power supply modules to supply power to the pre-charge modules connected thereto according to a preset power supply sequence, and control multiple pre-charge modules to work in sequence according to the power supply sequence for a preset time and then stop working; Obtaining the output voltages of the plurality of power supply modules and obtaining the pre-charge voltages outputted to the power conversion module by the plurality of pre-charge modules after the pre-charge is completed; When the difference between the output voltage of any power supply module and the pre-charge voltage of the pre-charge module connected thereto is greater than a first preset difference, determining that the energy storage system has a first wiring fault; When the difference between the pre-charging voltage of the pre-charging module and the output voltage of the power supply module connected thereto is not greater than a first preset difference, and the number of the pre-charging module is different from the number of the working power supply module, it is determined that the energy storage system has a second wiring fault.

2. The energy storage system wiring fault detection method according to claim 1, characterized in that: When the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than a first preset difference, and the number of the pre-charge module is different from the number of the working power supply module, determining that the energy storage system has a second wiring fault includes: When the difference between the pre-charge voltage of the pre-charge module and the output voltage of the power supply module connected thereto is not greater than a first preset difference, and the number of the pre-charge module is different from the number of the working power supply module, record the number of the power supply module and the number of the pre-charge module; According to the correspondence between the serial number of the power supply module and the serial number of the pre-charge module, the control logic of the pre-charge module to be connected and corrected with the power supply module is re-determined.

3. The energy storage system wiring fault detection method according to claim 1, characterized in that: After determining that the energy storage system has a fault, the method further includes: Record the serial number of the power supply module with the connection error and the serial number of the pre-charge module connected thereto; According to the corresponding relationship between the numbers of the power supply module and the pre-charge module, re-determine the control logic of the pre-charge module to be connected and calibrated with the power supply module; Controlling the plurality of power supply modules to supply power to the pre-charge modules to be connected and calibrated respectively; When the difference between the output voltage of each pre-charged module to be connected and corrected and the corresponding power supply module is not greater than the first preset difference, it is determined that the correction between each erroneously connected power supply module and the pre-charged module to be connected and corrected is complete.

4. The energy storage system wiring fault detection method according to claim 1, characterized in that: After determining that the energy storage system has a fault, the method further includes: Record the serial number of the power supply module with the connection error and the pre-charged module and serial number connected to it; According to the correspondence between the serial number of the power supply module and the serial number of the pre-charge module, re-determine the control logic of the pre-charge module to be connected and calibrated with the power supply module; Controlling the plurality of power supply modules to supply power to the pre-charge modules to be connected and calibrated respectively; When the difference between the output voltage of any pre-charging module to be connected and corrected and the corresponding power supply module is greater than a first preset difference, it is determined that the energy storage system has a first wiring fault and an alarm message is output, wherein the alarm message includes the corresponding numbers of the power supply module and pre-charging module to be checked.

5. The energy storage system wiring fault detection method according to any one of claims 1 to 4, characterized in that: Each of the power supply modules has a positive output interface and a negative output interface, and each of the pre-charging modules has a positive input interface and a negative input interface, the positive output interface is used to connect to the negative input interface, and the negative output interface is used to connect to the positive input interface; The first wiring fault indicates that in the energy storage system, the positive output interface of at least one of the power supply modules is connected to the positive input interface or the negative input interface of one of the two power conversion modules, and the negative output interface of the power supply module is connected to the positive input interface or the negative input interface of the other of the two power conversion modules; or, the first wiring fault indicates that in the energy storage system, the positive output interface of at least one of the power supply modules is connected to the negative input interface of a pre-charging module, and the negative output interface of the power supply module is connected to the positive input interface of the pre-charging module; The second wiring fault indicates that in the energy storage system, there is a positive output interface of a power supply module numbered N connected to the positive input interface of a pre-charging module numbered M, and a negative output interface of a power supply module numbered N connected to the negative input interface of a pre-charging module numbered M, and the power supply module numbered N and the pre-charging module numbered M are not paired.

6. The energy storage system wiring fault detection method according to any one of claims 1 to 4, characterized in that: The energy storage system further includes an alarm system, and the energy storage system wiring fault detection method further includes: In the case where the energy storage system has a first wiring fault, determining the number of each power supply module and the number of the pre-charging module that are in the first wiring fault; The alarm system outputs an alarm signal and indicates the number.

7. The energy storage system wiring fault detection method according to any one of claims 1 to 4, characterized in that: Before controlling the output of multiple power supply modules and controlling multiple pre-charging modules to perform pre-charging, the energy storage system wiring fault detection method further includes: Detecting the insulation resistance value between the positive and negative electrodes of each power supply module; When the insulation resistance of each power supply module is greater than a preset resistance value, controlling the plurality of power supply modules to start working; When the insulation resistance of any power supply module is not greater than a preset resistance value, the plurality of power supply modules are controlled to remain in a standby state or enter a standby state.

8. A method for detecting wiring faults in an energy storage system, characterized in that: The energy storage system includes a plurality of power conversion modules, a plurality of power supply modules, and a pre-charging module connected in series between each of the power conversion modules and the power supply modules. The energy storage system wiring fault detection method includes: In response to the numbering instruction, the plurality of power supply modules and the plurality of pre-charged modules are numbered in sequence, wherein the number of each power supply module is the same as the number of the pre-charged module for pairing and connecting therewith; Control the multiple power supply modules to supply power to the pre-charging modules in sequence, and control the multiple pre-charging modules to stop working after working for a preset time; Obtaining the output voltages of the plurality of power supply modules and obtaining the pre-charge voltages outputted to the power conversion module by the plurality of pre-charge modules after the pre-charge is completed; Recording the number of the pre-charging module and the number of the power supply module when the pre-charging is successful, and the number of the pre-charging module and the number of the power supply module when the pre-charging is unsuccessful, respectively, wherein the pre-charging success indicates that the difference between the pre-charging voltage of the pre-charging module and the output voltage of the power supply module is not greater than a first preset difference, and the pre-charging failure indicates that the difference between the pre-charging voltage of the pre-charging module and the output voltage of the power supply module is greater than the first preset difference; In the case where the numbers of the pre-charging module and the power supply module when the pre-charging fails are recorded, determining that the pre-charging module and the power supply module that failed to pre-charge are incorrectly connected, and determining that the energy storage system has a first wiring fault; When the number of the pre-charging module and the number of the power supply module recorded when the pre-charging is successful do not correspond, it is determined that the pre-charging module and the power supply module corresponding to the numbers are incorrectly connected, and it is determined that the energy storage system has a second wiring fault.

9. A device for detecting wiring faults in an energy storage system, characterized in that: The energy storage system wiring fault detection device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor; The computer program is configured to implement the energy storage system wiring fault detection method according to any one of claims 1 to 7, and / or the computer program is configured to implement the energy storage system wiring fault detection method according to claim 8.

10. An energy storage system, characterized in that: The energy storage system comprises: Multiple power supply modules; A plurality of power conversion modules, wherein the plurality of power supply modules and the plurality of power conversion modules are paired one by one; the power conversion module has a pre-charging module, and the power supply module is connected to the power conversion module via the pre-charging module; The energy storage system wiring fault detection device as described in claim 9, wherein the energy storage system wiring fault detection device is used to detect the connection status between the multiple power supply modules and the multiple power conversion modules, and control the energy storage system to perform corresponding work according to the connection status.

11. The energy storage system according to claim 10, characterized in that: The energy storage system also includes a transformer; The output end of each power conversion module is connected to the input end of the transformer through a first switch, and the output end of the transformer is used to connect to an electrical device; The first switch is used to close when it is determined that the power supply module is connected to a power conversion module connected thereto in a paired manner, so that the power conversion module converts the electric energy output by the power supply module and outputs it to the transformer; The transformer is used to transform the electric energy and output the electric energy to the electric equipment.

12. An electrical equipment, characterized in that: The electrical equipment includes: Equipment body; The energy storage system according to claim 10 or 11; The output ends of the multiple power conversion modules of the energy storage system are connected to the input ends of the device body. When the energy storage system is in a correctly connected state, electric energy is output to the device body. When a fault occurs in the energy storage system, the corresponding power conversion module is controlled to stop outputting electric energy to the device body.

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