Power supply abnormity processing method and device, energy storage system, controller and storage medium

Abstract

The application relates to a power supply abnormality processing method and device, an energy storage system, a controller and a storage medium. The method comprises the following steps: acquiring operation data of a plurality of first voltage conversion modules of an energy storage device; the plurality of first voltage conversion modules redundantly supply power to a primary controller in the energy storage device, and the plurality of first voltage conversion modules are connected to a power supply end of the energy storage device; receiving operation data of a second voltage conversion module sent by a secondary controller of the energy storage device; the operation data of the second voltage conversion module is acquired by the secondary controller; the second voltage conversion module supplies power to the secondary controller in the energy storage device, and the second voltage conversion module is connected to the power supply end in the energy storage device; determining voltage conversion abnormality according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module; and performing abnormality processing on the energy storage device according to the voltage conversion abnormality. The method can improve the reliability of controller operation in the energy storage device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, in particular to a power supply abnormality processing method and device, an energy storage system, a controller and a storage medium. BACKGROUND

[0002] With the rapid development of the new energy industry, the application of energy storage devices is becoming more and more widespread. In the operation process of the energy storage device, the reliable power supply of the controller in the energy storage device is the key to the stable operation of the energy storage device.

[0003] In the related art, the power supply abnormality of the controller in the energy storage device is often processed only after the controller in the energy storage device loses power, which affects the stable operation of the energy storage device.

[0004] Therefore, there is an urgent need to provide a scheme capable of processing the power supply abnormality of the controller in the energy storage device in a timely manner to improve the reliability of the operation of the controller in the energy storage device. SUMMARY

[0005] Based on this, the present application provides a power supply abnormality processing method and device, an energy storage system, a controller and a storage medium, which can improve the reliability of the operation of the controller in the energy storage device.

[0006] In a first aspect, the present application provides a power supply abnormality processing method, which comprises: obtaining operation data of a plurality of first voltage conversion modules of an energy storage device; the plurality of first voltage conversion modules redundantly supply power to a primary controller in the energy storage device, and the plurality of first voltage conversion modules are connected to a power supply end of the energy storage device; receiving operation data of a second voltage conversion module sent by a secondary controller of the energy storage device; the operation data of the second voltage conversion module is obtained by the secondary controller; the second voltage conversion module supplies power to the secondary controller in the energy storage device, and the second voltage conversion module is connected to the power supply end in the energy storage device; determining a voltage conversion abnormality according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module; and performing abnormality processing on the energy storage device according to the voltage conversion abnormality.

[0007] In the technical scheme provided by the embodiments of the present application, the primary controller in the energy storage device is provided with redundant power supply, the voltage conversion abnormality is determined according to the operation data of the plurality of first voltage conversion modules for supplying power to the primary controller and the operation data of the second voltage conversion module for supplying power to the secondary controller, and the energy storage device is processed abnormally according to the voltage conversion abnormality, so that the energy storage device can be processed abnormally in time, and the influence of the voltage conversion abnormality in the energy storage device on the operation of the energy storage device can be reduced as much as possible, thereby improving the reliability of the operation of the controller in the energy storage device. In addition, the operation data of the second voltage conversion module is obtained by the secondary controller, the wiring distance between the secondary controller and the second voltage conversion module is short, thereby reducing the risk of signal attenuation, so that the operation data of each second voltage conversion module can be obtained more accurately, and the accuracy of the obtained operation data is improved. The secondary controller sends the operation data of the second voltage conversion module to the primary controller, compared with the scheme in which the primary controller directly obtains the operation data of the second voltage conversion module, the wiring length when detecting the operation data of the second voltage conversion module can be reduced, and the load pressure of the primary controller in the data acquisition link is also reduced, thereby avoiding the problems of communication link congestion, response delay and the like caused by the primary controller needing to simultaneously establish a connection with a plurality of second voltage conversion modules, and the reliability of the primary controller in obtaining the operation data is improved.

[0008] In some embodiments, processing the energy storage device abnormally according to the voltage conversion abnormality comprises: when the voltage conversion abnormality comprises partial first voltage conversion module abnormality in the plurality of first voltage conversion modules, performing first alarm processing on the energy storage device; and when the voltage conversion abnormality comprises all first voltage conversion module abnormality in the plurality of first voltage conversion modules, performing high-voltage lowering processing and second alarm processing on the energy storage device.

[0009] In the technical scheme provided by the embodiments of the present application, when only part of the plurality of first voltage conversion modules is abnormal, the operation and maintenance personnel can be prompted to carry out targeted maintenance through alarm processing, and at this time, the remaining normal first voltage conversion modules can still maintain the basic power supply demand of the energy storage device, thereby avoiding directly triggering shutdown due to partial first voltage conversion module abnormality and affecting the operation reliability of the energy storage device. When all the first voltage conversion modules are abnormal, the high-voltage loop of the energy storage device can be immediately cut off through high-voltage lowering processing, thereby preventing the energy storage device from being unable to detect the operation state due to the loss of power supply support of the primary controller, and further causing safety risks such as over-discharge of the energy storage device and out-of-control of the circuit, so that the operation safety of the energy storage device can be ensured while the unnecessary shutdown influence is minimized.

[0010] In some embodiments, each first voltage conversion module comprises at least two voltage conversion units connected in series; in the case that the voltage conversion abnormality comprises partial first voltage conversion module abnormality in the plurality of first voltage conversion modules, the first alarm processing of the energy storage device comprises: in the case that the voltage conversion abnormality comprises partial voltage conversion unit abnormality in the at least two voltage conversion units of each abnormal first voltage conversion module, performing first-level first alarm processing of the energy storage device; in the case that the voltage conversion abnormality comprises all voltage conversion unit abnormality in the at least two voltage conversion units of each abnormal first voltage conversion module, performing second-level first alarm processing of the energy storage device; wherein the alarm level of the second level is higher than the alarm level of the first level.

[0011] In the technical scheme provided by the embodiments of the present application, since each first voltage conversion module comprises at least two voltage conversion units connected in series, each voltage conversion unit bears part of the voltage drop conversion, avoiding the need for a single voltage conversion unit to convert from a higher voltage to the rated supply voltage of the primary controller, so that the single voltage conversion unit bears the entire voltage conversion pressure in the voltage conversion process, thereby avoiding the problem of deterioration of the electrical performance of the voltage conversion unit. In addition, partial voltage conversion unit abnormality is often caused by the failure of the partial voltage conversion unit itself due to long use time or other problems. In general, the probability of bus power supply abnormality is small, so low-level alarm processing is performed on the energy storage device, while all voltage conversion unit abnormality is probably caused by bus power supply abnormality, for example, unstable voltage output by the bus causes all voltage conversion units to fail, so high-level alarm processing is performed on the energy storage device. Therefore, the potential impact degree of partial first voltage conversion module abnormality can be determined to provide differentiated priority guidance for maintenance personnel, thereby significantly improving the accuracy of fault diagnosis and maintenance efficiency of the energy storage device.

[0012] In some embodiments, the operating data comprises an output voltage; the voltage conversion abnormality is determined according to the operating data of the plurality of first voltage conversion modules and the operating data of the second voltage conversion module, comprising: in the case that the output voltage of the second voltage conversion module is normal, the output voltage of the plurality of first voltage conversion modules gradually decreases until the output voltage of the plurality of first voltage conversion modules is less than a preset voltage, the voltage conversion abnormality is determined to be a primary controller power failure abnormality; in the case that the voltage conversion abnormality comprises all first voltage conversion module abnormality, the energy storage device is subjected to high-voltage reduction processing and second alarm processing, comprising: according to the primary controller power failure abnormality, the black start switch in the energy storage device is controlled to be closed, so that the second voltage conversion module supplies power to the primary controller through the black start switch, and the energy storage device is subjected to high-voltage reduction processing and second alarm processing.

[0013] In the technical scheme provided by the embodiment of the application, the black start switch in the energy storage device is controlled to be closed in the case that the output voltages of the plurality of first voltage conversion modules are all less than the preset voltage, so that the black start switch in the energy storage device is controlled to be closed in the case that the primary controller still has power input, thereby avoiding the case that the black start switch in the energy storage device can be closed only in the case that the primary controller is powered off, and the control of the primary controller is avoided to be affected due to the power-off of the primary controller, and the operation reliability of the energy storage device is improved.

[0014] In some embodiments, the operation data includes an output voltage; and the voltage conversion abnormality is determined according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module, including: in the case that the output voltage of the second voltage conversion module is normal and the output voltages of the plurality of first voltage conversion modules all do not meet the voltage requirement of the primary controller, determining that the voltage conversion abnormality is a primary controller power supply voltage abnormality; and in the case that the voltage conversion abnormality includes that the plurality of first voltage conversion modules are all abnormal, performing a high-voltage reduction process and a second alarm process on the energy storage device, including: according to the primary controller power supply voltage abnormality, controlling the black start switch in the energy storage device to be closed, controlling the connection between the power supply end of the energy storage device and the plurality of first voltage conversion modules to be disconnected, so that the second voltage conversion module supplies power to the primary controller through the black start switch, and performing the high-voltage reduction process and the second alarm process on the energy storage device.

[0015] In the technical scheme provided by the embodiment of the application, the black start switch in the energy storage device is controlled to be closed in the case that the output voltages of the plurality of first voltage conversion modules are all less than the preset voltage, so that the black start switch in the energy storage device is controlled to be closed in the case that the primary controller still has power input, thereby avoiding the case that the black start switch in the energy storage device can be closed only in the case that the primary controller is powered off, and the control of the primary controller is avoided to be affected due to the power-off of the primary controller, and the operation reliability of the energy storage device is improved.

[0016] In some embodiments, the power supply end comprises a bus power supply end and a battery cluster managed by the secondary controller; the energy storage device further comprises a third voltage conversion module, the third voltage conversion module and the second voltage conversion module are connected to the primary controller through the black start switch, the third voltage conversion module is further connected to the battery cluster managed by the secondary controller, and the second voltage conversion module is further connected to the bus power supply end; the low-voltage processing of the energy storage device comprises: in the case that the second voltage conversion module is normal, determining a target time length between the current time and the time when the energy storage device is low-voltage processed according to the remaining high-voltage time length of the energy storage device, and starting the low-voltage processing of the energy storage device at the time interval of the target time length; in the case that the second voltage conversion module is abnormal, the low-voltage processing of the energy storage device is performed at the current time.

[0017] In the technical scheme provided by the embodiments of the present application, the time for the low-voltage processing of the energy storage device is determined according to whether the second voltage conversion module is abnormal, so that in the case that the second voltage conversion module is normal, the primary controller does not consume the electric energy of the battery cluster connected to the black start switch and does not affect the operation of the battery cluster, so that the low-voltage processing of the energy storage device can be delayed, which not only improves the utilization rate of the energy storage device, but also enables the maintenance of the energy storage device to be performed in time after the low-voltage processing of the energy storage device; and in the case that the second voltage conversion module is abnormal, the primary controller consumes the electric energy of the battery cluster connected to the black start switch and affects the operation of the battery cluster, so that the low-voltage processing of the energy storage device is performed at the current time to isolate the battery cluster as early as possible, thereby improving the operation reliability of the energy storage device.

[0018] In some embodiments, the abnormal processing of the energy storage device according to the voltage conversion abnormality comprises: in the case that the voltage conversion abnormality comprises the abnormality of the second voltage conversion module and all the first voltage conversion modules are normal, performing third alarm processing on the energy storage device and performing low-voltage processing on the battery cluster managed by the secondary controller, the third alarm processing being used to indicate the abnormality of the second voltage conversion module; in the case that the voltage conversion abnormality comprises the abnormality of the second voltage conversion module and part of the first voltage conversion modules are abnormal, performing fourth alarm processing on the energy storage device and performing low-voltage processing on the battery cluster managed by the secondary controller, the fourth alarm processing being used to indicate the abnormality of the second voltage conversion module and the abnormality of part of the first voltage conversion modules; in the case that the voltage conversion abnormality comprises the abnormality of the second voltage conversion module and all the first voltage conversion modules are abnormal, performing fifth alarm processing on the energy storage device and performing low-voltage processing on the energy storage device, the fifth alarm processing being used to indicate the abnormality of the second voltage conversion module and the abnormality of all the first voltage conversion modules.

[0019] In the technical scheme provided by the embodiment of the application, when it is detected that the abnormal combination includes the second voltage conversion module being abnormal, the low-voltage processing of the battery cluster corresponding to the abnormal second voltage conversion module is performed, so that the faulty module is quickly isolated, the abnormality is prevented from spreading, the normal operation of the remaining battery clusters is maintained, and the other battery clusters that can be normally controlled are prevented from being affected; and at the same time when the second voltage conversion module is abnormal, the energy storage device is processed differently according to different situations that all the first voltage conversion modules are normal, some of the first voltage conversion modules are abnormal, and all the first voltage conversion modules are abnormal, so that the pertinence and effectiveness of the fault disposal of the energy storage device are improved.

[0020] In some embodiments, the energy storage device further includes a third voltage conversion module, the third voltage conversion module is connected to the battery cluster managed by the secondary controller, and the second voltage conversion module is connected to the bus of the power supply end; in the case that the second voltage conversion module is abnormal, the third voltage conversion module supplies power to the secondary controller; and the low-voltage processing of the battery cluster managed by the secondary controller includes: outputting a low-voltage instruction to the secondary controller, so that the secondary controller performs the low-voltage processing on the battery cluster managed by the secondary controller.

[0021] In the technical scheme provided by the embodiment of the application, in the case that the second voltage conversion module is abnormal, the third voltage conversion module supplies power to the secondary controller, so that the problem that the secondary controller cannot perform the low-voltage processing of the battery cluster due to the power loss of the secondary controller is avoided, and the control reliability of the energy storage device is improved.

[0022] In the second aspect, the application provides an energy storage device, which includes: a primary controller, a plurality of first voltage conversion modules, a secondary controller and a second voltage conversion module, the plurality of first voltage conversion modules are connected to the primary controller, the second voltage conversion module is connected to the secondary controller, the primary controller is in communication connection with the secondary controller, and the second voltage conversion module and the plurality of first voltage conversion modules are connected to the power supply end in the energy storage device; the primary controller is configured to acquire operation data of the plurality of first voltage conversion modules, receive operation data of the second voltage conversion module sent by the secondary controller, and determine a voltage conversion abnormality according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module; and the energy storage device is processed abnormally according to the voltage conversion abnormality.

[0023] In some embodiments, the energy storage device further comprises a black start switch and a third voltage conversion module, the power supply end comprises a bus power supply end and a battery cluster managed by the secondary controller; the third voltage conversion module and the second voltage conversion module are both connected to the primary controller through the black start switch, and the third voltage conversion module and the second voltage conversion module are both connected to the secondary controller; the third voltage conversion module is further connected to the battery cluster managed by the secondary controller, and the second voltage conversion module is further connected to the bus power supply end.

[0024] In a third aspect, the present application provides an energy storage system, comprising the energy storage device of any one of the second aspect.

[0025] In a fourth aspect, the present application provides a power supply abnormality processing device, comprising: an acquisition module, configured to acquire operation data of a plurality of first voltage conversion modules of an energy storage device; the plurality of first voltage conversion modules redundantly supply power to a primary controller in the energy storage device, and the plurality of first voltage conversion modules are connected to a power supply end of the energy storage device; a communication module, configured to receive operation data of a second voltage conversion module sent by a secondary controller of the energy storage device; the operation data of the second voltage conversion module is acquired by the secondary controller; the second voltage conversion module supplies power to the secondary controller in the energy storage device; the second voltage conversion module is connected to the power supply end in the energy storage device; a determination module, configured to determine a voltage conversion abnormality according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module; and a processing module, configured to perform abnormality processing on the energy storage device according to the voltage conversion abnormality.

[0026] In a fifth aspect, the present application provides a controller, comprising a memory and a processor, the memory stores a computer program, and the processor implements the steps of the method of any one of the first aspect when executing the computer program.

[0027] In a sixth aspect, the present application provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps of the method of any one of the first aspect when executed by a processor.

[0028] In a seventh aspect, the present application provides a computer program product, comprising a computer program, and the computer program implements the steps of the method of any one of the first aspect when executed by a processor. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technical solutions, the drawings needed to be used in the description of the embodiments of the present application or the related technical solutions will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other related drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0030] Figure 1 Structure diagram of a power storage container of some embodiments system;

[0031] Figure 2 Structure diagram of a power storage device provided for a first embodiment;

[0032] Figure 3 Structure diagram of a power storage device provided for a second embodiment;

[0033] Figure 4 Flow diagram of a power supply abnormality processing method provided for some embodiments;

[0034] Figure 5 Structure diagram of a power storage device provided for a third embodiment;

[0035] Figure 6 Structure diagram of a power storage device provided for a fourth embodiment;

[0036] Figure 7 Structure diagram of a power storage device provided for a fifth embodiment;

[0037] Figure 8 Structure diagram of a power storage device provided for a sixth embodiment;

[0038] Figure 9 Structure diagram of a power storage device provided for some embodiments;

[0039] Figure 10 Structure diagram of a power supply abnormality processing device provided for some embodiments;

[0040] Figure 11 Structure diagram of a controller provided for some embodiments. DETAILED DESCRIPTION

[0041] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of the present application, the technical terms "first", "second" and the like 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 two or more, and the meaning of "multiple groups" is two or more, unless otherwise explicitly specified. In the description of the embodiments of the present application, "each" means each or each of the plurality, unless otherwise explicitly specified.

[0044] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0046] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] At present, from the development of market situation, the application of energy storage device is more and more widely, and the energy storage device brings great power convenience to daily production and life. The energy storage device includes a plurality of battery clusters, and the plurality of battery clusters can be connected in series, parallel or series-parallel combination, for example, the plurality of battery clusters in the embodiments of the present application are connected in parallel with each other, each battery cluster in the energy storage device can be charged and discharged, and the charging and discharging of each battery cluster is controlled, thereby realizing large-scale energy storage and release. Exemplarily, the battery cluster is formed by connecting a plurality of battery packs together. For example, a battery cluster can be obtained by connecting a plurality of battery packs in series, parallel or series-parallel combination. Exemplarily, a battery cluster can include a battery pack. In some embodiments, the battery cluster can also be referred to as a battery cabinet.

[0048] The energy storage device can include an energy storage container, an energy storage power supply or other devices capable of energy storage, and embodiments of the present application do not limit this. Exemplarily, Figure 1 A schematic diagram of the structure of the energy storage container of some embodiments of the system is shown in FIG. 1. Figure 1 As shown, the energy storage container can be a regular cuboid structure, in which the six faces of the cuboid are the six outer walls of the energy storage device. The energy storage device is arranged in a cuboid structure, which can facilitate the fixed placement and transportation of the energy storage device. Of course, the energy storage device can also be other shapes, for example, at least one wall of the energy storage device is arranged obliquely.

[0049] The energy storage device includes a controller for controlling the operation of the energy storage device, the controller includes a primary controller and a secondary controller, and the secondary controller is a subordinate controller in the primary controller. The primary controller is responsible for the overall coordinated control of the energy storage device, such as implementing at least one of the following: communication with the power grid / energy management system, formulating charge and discharge strategies, power distribution, safety protection, etc. The secondary controller is responsible for the fine management of the battery cluster, such as implementing at least one of the following: state monitoring and reporting of the battery cluster, high-voltage up and down control of the battery cluster, etc.

[0050] If the power supply of the controller in the energy storage device is abnormal, it will cause the operation of the energy storage device to be abnormal, and thus affect the safe operation of the energy storage device. Therefore, stable power supply of the controller in the energy storage device is very important.

[0051] However, in the related art, the power supply abnormality of the controller in the energy storage device is often handled only after the controller in the energy storage device is powered off, but at this time the controller has already been powered off, which will still cause the operation of the energy storage device to be abnormal. The power-off of the controller refers to the loss of normal power supply of the controller, so that the controller is in a state where it cannot maintain its own operation and execute the preset functions.

[0052] To alleviate the above problems, it is found through research that the power supply abnormality of the primary controller and the secondary controller has different effects on the energy storage device. The power-off of the primary controller has a very great impact on the safe operation of the energy storage device. Therefore, the primary controller in the energy storage device is provided with redundant power supply, the operation data of the plurality of first voltage conversion modules for supplying power to the primary controller and the operation data of the second voltage conversion module for supplying power to the secondary controller are determined to determine voltage conversion abnormality, and the energy storage device is handled abnormally according to the voltage conversion abnormality. Thus, the energy storage device can be handled abnormally in a timely manner, and the impact of voltage conversion abnormality in the energy storage device on the operation of the energy storage device can be reduced as much as possible, and the reliability of the operation of the controller in the energy storage device is improved.

[0053] Based on the above considerations, the application provides a power supply abnormality processing method, which comprises the following steps: obtaining operation data of a plurality of first voltage conversion modules of an energy storage device; the plurality of first voltage conversion modules redundantly supply power to a primary controller in the energy storage device, and the plurality of first voltage conversion modules are connected to a power supply end of the energy storage device; receiving operation data of a second voltage conversion module sent by a secondary controller of the energy storage device; the operation data of the second voltage conversion module is obtained by the secondary controller; the second voltage conversion module supplies power to the secondary controller in the energy storage device, and the second voltage conversion module is connected to the power supply end in the energy storage device; determining a voltage conversion abnormality according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module; and performing abnormality processing on the energy storage device according to the voltage conversion abnormality.

[0054] In this way, the primary controller in the energy storage device is redundantly powered, the voltage conversion abnormality is determined according to the operation data of the plurality of first voltage conversion modules for supplying power to the primary controller and the operation data of the second voltage conversion module for supplying power to the secondary controller, and the abnormality processing is performed on the energy storage device according to the voltage conversion abnormality, so that the abnormality processing can be performed on the energy storage device in a timely manner, and the influence of the voltage conversion abnormality in the energy storage device on the operation of the energy storage device can be reduced as much as possible, thereby improving the reliability of the operation of the controller in the energy storage device. In addition, the operation data of the second voltage conversion module is obtained by the secondary controller, the wiring distance between the secondary controller and the second voltage conversion module is short, thereby reducing the risk of signal attenuation, so that the operation data of each second voltage conversion module can be more accurately obtained, and the accuracy of the obtained operation data is improved. Compared with the scheme in which the primary controller directly obtains the operation data of the second voltage conversion module, the secondary controller sends the operation data of the second voltage conversion module to the primary controller, not only can the wiring length when detecting the operation data of the second voltage conversion module be reduced, but also the load pressure of the primary controller in the data acquisition link is reduced, and problems such as communication link congestion and response delay caused by the primary controller needing to simultaneously establish a connection with a plurality of second voltage conversion modules are avoided, thereby improving the reliability of the primary controller in obtaining the operation data.

[0055] Figure 2 The structure diagram of the energy storage device provided for the first embodiment is shown in Figure 2As shown, the energy storage device includes a power supply end, a primary controller, a plurality of first voltage conversion modules, a plurality of secondary controllers (secondary controller 1 to secondary controller n, n is an integer greater than or equal to 2) and a plurality of second voltage conversion modules (second voltage conversion module 1 to second voltage conversion module n). The second voltage conversion modules and the plurality of first voltage conversion modules are connected to the power supply end, and the plurality of first voltage conversion modules are connected to the primary controller, so that the plurality of first voltage conversion modules redundantly supply power to the primary controller. Each second voltage conversion module is connected to a corresponding one of the secondary controllers, so that each second voltage conversion module supplies power to the corresponding one of the secondary controllers. The plurality of secondary controllers are in communication connection with the primary controller.

[0056] Figure 2 As shown, there are two first voltage conversion modules, namely first voltage conversion module 1 and first voltage conversion module 2. In other embodiments, the plurality of first voltage conversion modules can be other numbers of first voltage conversion modules, for example, the plurality of first voltage conversion modules can include three first voltage conversion modules, four first voltage conversion modules or five first voltage conversion modules, etc. The embodiments of the present application do not enumerate them one by one.

[0057] The plurality of first voltage conversion modules are connected to the primary controller, so that the plurality of first voltage conversion modules can supply power to the primary controller, realizing redundant power supply of the plurality of first voltage conversion modules to the primary controller.

[0058] In Figure 2 As shown in the embodiment, it is shown that the plurality of secondary controllers correspond one-to-one to the plurality of second voltage conversion modules, that is, each second voltage conversion module is connected to each secondary controller, so that each second voltage conversion module supplies power to each secondary controller. In some other embodiments, the correspondence between the secondary controllers and the second voltage conversion modules is a many-to-one correspondence, that is, each plurality of secondary controllers is connected to one second voltage conversion module, so that one second voltage conversion module supplies power to the plurality of secondary controllers. In some other embodiments, the correspondence between the secondary controllers and the second voltage conversion modules is a one-to-many correspondence, that is, each plurality of second voltage conversion modules is connected to one secondary controller, so that the plurality of second voltage conversion modules redundantly supply power to the secondary controller. The abnormalities of different second voltage conversion modules can be independent of each other.

[0059] In any embodiment of this application, the voltage conversion module may include a transformer. Exemplarily, the voltage conversion module may include a direct current-to-direct current (DC-DC) conversion module or an alternating current-to-direct current (AC-DC) conversion module. For example, the voltage conversion module in the embodiments of this application may be a DC-DC conversion module.

[0060] Figure 3 A schematic diagram of the energy storage device provided in the second embodiment is shown below. Figure 3 As shown, the power supply terminals include a first bus power supply terminal and a second bus power supply terminal. Figure 3 The example is in Figure 2 Based on the embodiment, the first voltage conversion module 1 obtains voltage from the first bus power supply terminal (i.e., the bus of the current energy storage device) of the current energy storage device (i.e., the current energy storage device where the first voltage conversion module is located), and converts this voltage into the power supply voltage of the first-level controller. The first voltage conversion module 2 obtains voltage from the second bus power supply terminal of the current energy storage device, which is connected to the bus of another energy storage device (e.g., another energy storage device in the energy storage system other than the current energy storage device), and converts this voltage into the power supply voltage of the first-level controller. For example, the current energy storage device and the other energy storage device are energy storage devices of the same model, or the bus voltage of the current energy storage device is the same as the bus voltage of the other energy storage device.

[0061] exist Figure 3 In the illustrated embodiment, each second voltage conversion module obtains voltage from the bus of another energy storage device and converts that voltage into the power supply voltage for the secondary controller. In other embodiments, each second voltage conversion module may obtain voltage from the bus of the current energy storage device, or it may obtain voltage from both the bus of the current energy storage device and the bus of another energy storage device, to achieve redundant power supply for each second voltage conversion module.

[0062] The energy storage device in this embodiment can be any energy storage device in an energy storage system. Every two adjacent energy storage devices in the energy storage system can be grouped together. The first voltage conversion module 1 in each energy storage device obtains voltage from the bus of that energy storage device, and the first voltage conversion module 2 in each energy storage device obtains voltage from the bus of another energy storage device in the group. In this way, the problem of the first voltage conversion module 1 and the first voltage conversion module 2 in each energy storage device obtaining voltage from the bus of one energy storage device, and being unable to supply power to the first-level controller when the bus power supply of that energy storage device is abnormal, can be avoided.

[0063] In some embodiments, the plurality of first voltage conversion modules are respectively connected to a plurality of power supply ends of the primary controller, the plurality of power supply ends correspond to the plurality of first voltage conversion modules one by one, and the primary controller can select a voltage conversion module with the highest priority and normal power supply from the plurality of first voltage conversion modules for power supply according to the priorities of the plurality of first voltage conversion modules. For example, the priority of the first voltage conversion module 1 is higher than the priority of the first voltage conversion module 2. In other embodiments, the output ends of the plurality of first voltage conversion modules are connected and then accessed to the power supply interface of the primary controller, so that the voltage input by the plurality of voltage conversion modules to the primary controller is the same, and the current obtained by the primary controller is the sum of the currents output by the plurality of voltage conversion modules.

[0064] The following describes an implementation manner of the power supply abnormality processing method of the embodiments of the present application. Unless otherwise specified, the power supply abnormality processing method can be applied to the primary controller in the energy storage device.

[0065] Figure 4 For some embodiments, a flowchart of the power supply abnormality processing method is shown in FIG. 1, and the method includes the following steps. Figure 4

[0066] S401, obtaining running data of a plurality of first voltage conversion modules of an energy storage device; the plurality of first voltage conversion modules redundantly supply power to a primary controller in the energy storage device, and the plurality of first voltage conversion modules are connected to power supply ends of the energy storage device.

[0067] The running data of the voltage conversion module is a key indicator reflecting the working state, performance and stability of the voltage conversion module. For example, the running data of the voltage conversion module can include at least one of the following: output voltage value, output current value, input voltage value, input current value, output power, module temperature, ripple voltage value, load rate, etc., and the embodiments of the present application do not limit this. The ripple voltage value represents the voltage value of the alternating component contained in the output voltage, and the load rate is the ratio of the actual output power to the rated power.

[0068] For example, the primary controller can obtain the detected input voltage and / or output voltage of each first voltage conversion module, determine whether the power supply of each first voltage conversion module is abnormal according to the input voltage and / or output voltage of each first voltage conversion module, and obtain the detected input voltage and / or output voltage of the second voltage conversion module. The primary controller can also determine whether the power supply of the second voltage conversion module is abnormal according to the input voltage and / or output voltage of the second voltage conversion module. Thus, the primary controller can determine the voltage conversion abnormality in the case of the abnormality of the second voltage conversion module and / or the abnormality of at least one first voltage conversion module.

[0069] ​For example, the primary controller determines that the at least one first voltage conversion module is abnormal in a case where the primary controller determines that the input voltage to the at least one first voltage conversion module does not satisfy the first preset voltage range, and / or in a case where the primary controller determines that the output voltage to the at least one first voltage conversion module does not satisfy the second preset voltage range. For example, the primary controller determines that the at least one second voltage conversion module is abnormal in a case where the primary controller determines that the input voltage to the at least one second voltage conversion module does not satisfy the third preset voltage range, and / or in a case where the primary controller determines that the output voltage to the at least one second voltage conversion module does not satisfy the fourth preset voltage range.

[0070] The following describes that the primary controller obtains the input voltage and / or the output voltage of the plurality of first voltage conversion modules, taking the running data including the input voltage and / or the output voltage as an example:

[0071] For example, the energy storage device further includes a plurality of first voltage detection modules corresponding to the plurality of first voltage conversion modules one by one, each first voltage detection module is connected to the input end and / or the output end of each first voltage conversion module, the input voltage and / or the output voltage of each first voltage conversion module is detected by each first voltage detection module, and each first voltage detection module is connected to the primary controller, so that the primary controller can obtain the input voltage and / or the output voltage of each first voltage conversion module detected by each first voltage detection module. For another example, the input end and / or the output end of the plurality of first voltage conversion modules can be connected to the voltage detection end of the primary controller, so that the primary controller can detect the input voltage and / or the output voltage of the plurality of first voltage conversion modules.

[0072] S402, receiving running data of a second voltage conversion module sent by a secondary controller of an energy storage device; the running data of the second voltage conversion module is obtained by the secondary controller; the second voltage conversion module supplies power to the secondary controller in the energy storage device, and the second voltage conversion module is connected to a power supply end in the energy storage device.

[0073] The following describes that the secondary controller obtains the input voltage and / or the output voltage of the second voltage conversion module, taking the running data including the input voltage and / or the output voltage as an example:

[0074] For example, the energy storage device further comprises a plurality of second voltage detection modules corresponding to the plurality of second voltage conversion modules one-to-one, each second voltage detection module is connected to the input end and / or the output end of the corresponding second voltage conversion module, the input voltage and / or the output voltage of each second voltage conversion module is detected by the corresponding second voltage detection module, each second controller is connected to the corresponding second voltage detection module, and each second controller is connected to the first controller, each second controller obtains the input voltage and / or the output voltage of each second voltage conversion module output by the corresponding second voltage detection module, and sends the input voltage and / or the output voltage of each second voltage conversion module to the first controller. For another example, the input end and / or the output end of each second voltage conversion module can be connected to the voltage detection end of the corresponding second controller, so that the second controller can detect the input voltage and / or the output voltage of the corresponding second voltage conversion module.

[0075] In some embodiments, in order to reduce the energy consumption of the energy storage device, a normal range, a critical range and an abnormal range of the running data are set, and the critical range of the running data is a range between the normal range and the abnormal range of the running data. The normal range and the critical range of the running data are included in the normal range of the running data. When the running data is in the set normal range, the data is collected at a low first frequency, when the running data is in the critical range for a long time, the data is collected at a medium second frequency, and when the running data is in the abnormal range for a long time, the data is collected at a high second frequency.

[0076] In some embodiments, in order to reduce the problem of high energy consumption caused by large amount of data transmission, the running data of the second voltage conversion module obtained by the second controller can be target frequency sampling running data, the second controller transmits preset frequency sampling running data to the first controller in the case of normal running data, and the preset frequency is less than the target frequency; the second controller transmits target frequency sampling running data to the first controller in the case of abnormal running data.

[0077] S403, determining voltage conversion abnormity according to the running data of the plurality of first voltage conversion modules and the running data of the second voltage conversion module.

[0078] For example, the voltage conversion abnormity can include at least one of the following: second voltage conversion module abnormity, partial voltage conversion module abnormity in the plurality of first voltage conversion modules, all voltage conversion module abnormity in the plurality of first voltage conversion modules, combination of the second voltage conversion module abnormity and the partial voltage conversion module abnormity in the plurality of first voltage conversion modules, and combination of the second voltage conversion module abnormity and the all voltage conversion module abnormity in the plurality of first voltage conversion modules.

[0079] It should be noted that the second voltage conversion module in the embodiments of the present application can be one second voltage conversion module or at least two second voltage conversion modules without special instructions, and the embodiments of the present application do not limit this. The abnormality processing mode of different number of second voltage conversion modules can be analogized.

[0080] Exemplarily, the voltage conversion abnormality can include at least one of the following of the voltage conversion module: unstable output voltage, absolute value of difference between output voltage and rated output voltage greater than or equal to preset difference, insufficient output current, AC component of output voltage exceeding standard, abnormal switching, temperature abnormality, poor interface contact, no output voltage, no input voltage, etc.

[0081] Exemplarily, according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module, it is determined whether the second voltage conversion module is abnormal and / or whether each first voltage conversion module is abnormal, and in the case that the second voltage conversion module is abnormal and / or at least one first voltage conversion module is abnormal, it is determined that the voltage conversion is abnormal.

[0082] In some embodiments, a relationship table between the operation data type and the normal operation data range / abnormal operation data range can be obtained, and according to the relationship table and the operation data under each type, it is determined whether the first voltage conversion module and / or the second voltage conversion module is abnormal.

[0083] In some embodiments, the normal operation data range can be a fixed data range. In other embodiments, according to the operation state of the energy storage device, a normal operation data range corresponding to the operation state is determined. For example, the normal operation data range corresponding to the discharge operation state of the energy storage device, the normal operation data range corresponding to the charge operation state of the energy storage device and the normal operation data range corresponding to the charge-discharge cutoff operation state of the energy storage device are different.

[0084] S404, according to the voltage conversion abnormality, performing abnormality processing on the energy storage device.

[0085] Exemplarily, the abnormality processing mode can include at least one of the following: alarm processing, high-voltage processing on the energy storage device, high-voltage processing on one or more battery clusters in the energy storage device.

[0086] In some embodiments, S404 can include: obtaining an abnormality processing manner of each abnormality combination in the plurality of abnormality combinations; the plurality of abnormality combinations include combinations of different voltage conversion module abnormalities in the second voltage conversion module and the plurality of first voltage conversion modules; determining an abnormality processing manner corresponding to the voltage conversion abnormality according to the voltage conversion abnormality and the abnormality processing manner of each abnormality combination; and performing abnormality processing on the energy storage device by using the abnormality processing manner corresponding to the voltage conversion abnormality.

[0087] Each abnormality combination has a corresponding abnormality processing manner. The abnormality processing manners corresponding to different abnormality combinations can be the same or different. In some embodiments, the abnormality processing manners of each abnormality combination can be preconfigured in the primary controller.

[0088] In the technical scheme provided by the embodiments of the present application, the primary controller in the energy storage device is set to redundant power supply, the voltage conversion abnormality is determined according to the operation data of the plurality of first voltage conversion modules for supplying power to the primary controller and the operation data of the second voltage conversion module for supplying power to the secondary controller, and the energy storage device is processed according to the voltage conversion abnormality, so that the energy storage device can be processed in time, and the influence of the voltage conversion abnormality in the energy storage device on the operation of the energy storage device can be reduced as much as possible, thereby improving the reliability of the controller operation in the energy storage device. In addition, the operation data of the second voltage conversion module is obtained by the secondary controller, the wiring distance between the secondary controller and the second voltage conversion module is short, thereby reducing the risk of signal attenuation, so that the operation data of each second voltage conversion module can be obtained more accurately, and the accuracy of the obtained operation data is improved. Compared with the scheme in which the primary controller directly obtains the operation data of the second voltage conversion module, the primary controller sends the operation data of the second voltage conversion module to the secondary controller, the wiring length for detecting the operation data of the second voltage conversion module is reduced, the load pressure of the primary controller in the data acquisition link is reduced, the problems such as communication link congestion and response delay caused by the primary controller needing to simultaneously establish connections with multiple second voltage conversion modules are avoided, and the reliability of the primary controller in obtaining operation data is improved.

[0089] In some embodiments, the abnormality processing on the energy storage device according to the voltage conversion abnormality includes: in the case that the voltage conversion abnormality includes partial first voltage conversion module abnormalities in the plurality of first voltage conversion modules, performing first alarm processing on the energy storage device.

[0090] In some embodiments, the abnormality processing on the energy storage device according to the voltage conversion abnormality includes: in the case that the voltage conversion abnormality includes all first voltage conversion module abnormalities in the plurality of first voltage conversion modules, performing high-voltage processing and second alarm processing on the energy storage device.

[0091] Exemplarily, the alarm processing of the energy storage device by the primary controller can include at least one of the following: the primary controller sending alarm information to the computer device; and the primary controller sending an alarm signal to an alarm module of the energy storage device to cause the alarm module to generate an alarm. For example, the alarm information can include at least one of the following: an identifier of the energy storage device, an identifier of the abnormal voltage conversion module, an abnormal type, and the like. The abnormal type can be determined according to the obtained operation data of the abnormal first voltage conversion module. For example, the alarm module can include an alarm light and / or an audio output module, the alarm light being used to flash after the alarm signal is obtained, and the audio output module being used to output an alarm prompt sound.

[0092] Exemplarily, the first alarm processing by the primary controller can include the primary controller sending first alarm information to the computer device. Exemplarily, the second alarm processing by the primary controller can include the primary controller sending second alarm information to the computer device; and the primary controller sending an alarm signal to an alarm module of the energy storage device to cause the alarm module to generate an alarm.

[0093] For example, the first alarm information or the second alarm information can include at least one of the following: an identifier of the energy storage device, an identifier of the abnormal first voltage conversion module, an identifier of the abnormal voltage conversion unit, an abnormal type, and the like.

[0094] Exemplarily, the high-voltage lowering processing of the energy storage device can include: performing the high-voltage lowering processing on all battery clusters in the energy storage device. For example, the high-voltage lowering processing on all battery clusters in the energy storage device can include: sending a high-voltage lowering instruction to all secondary controllers in the energy storage device to cause each secondary controller to perform the high-voltage lowering processing on the managed battery cluster.

[0095] In some embodiments, since the plurality of first voltage conversion modules redundantly supply power to the primary controller, in the case that part of the plurality of first voltage conversion modules are abnormal, another part of the plurality of first voltage conversion modules can still supply power to the primary controller, so that the power supply of the primary controller is not greatly affected. Therefore, if the abnormal combination is a power supply combination in which part of the plurality of first voltage conversion modules are abnormal, the abnormal processing mode of the power supply combination in which part of the plurality of first voltage conversion modules are abnormal can include: performing first alarm processing on the energy storage device.

[0096] For example, in the event of a partial failure of the first voltage conversion modules, the primary controller can issue a first alarm to the energy storage device based on the number of faulty first voltage conversion modules and / or their priority. For instance, the more faulty first voltage conversion modules there are, the higher the alarm level will be for the energy storage device. Similarly, the higher the priority of the faulty first voltage conversion modules, the higher the alarm level will be for the energy storage device.

[0097] In other embodiments, if all first voltage conversion modules malfunction, the power supply to the primary controller will be affected. Therefore, if the malfunction combination involves all first voltage conversion modules malfunctioning, the handling method for this combination can include: applying a high voltage reduction to the energy storage device and applying a second alarm. This avoids the problem of a power supply malfunction to the primary controller causing control malfunctions in the energy storage device, thereby affecting the safe operation of the energy storage device.

[0098] In some implementations, if multiple first voltage conversion modules malfunction, the emergency power supply module of the first-level controller can be used to supply power to the first-level controller so that the first-level controller can perform high-voltage processing on the energy storage device.

[0099] In the technical solution provided in this application embodiment, when only some of the multiple first voltage conversion modules malfunction, alarm processing can promptly prompt maintenance personnel to carry out targeted repairs. At this time, the remaining normal first voltage conversion modules can still maintain the basic power supply requirements of the energy storage device, avoiding direct shutdown due to the malfunction of some first voltage conversion modules, which would affect the operational reliability of the energy storage device. When all first voltage conversion modules malfunction, high-voltage processing can immediately cut off the high-voltage circuit of the energy storage device, preventing the energy storage device from being unable to detect its operating status due to the loss of power supply support by the primary controller, thereby preventing safety risks such as over-discharge and circuit runaway of the energy storage device. Thus, while ensuring the operational safety of the energy storage device, unnecessary shutdown impacts can be minimized.

[0100] In some embodiments, each first voltage conversion module includes at least two voltage conversion units connected in series.

[0101] In some embodiments, when a voltage conversion anomaly includes a partial anomaly of a plurality of first voltage conversion modules, a first alarm processing is performed on the energy storage device, including: when a voltage conversion anomaly includes a partial anomaly of at least two voltage conversion units of each of the abnormal first voltage conversion modules, a first level of first alarm processing is performed on the energy storage device.

[0102] In some embodiments, in the case that the voltage conversion abnormality includes a partial first voltage conversion module abnormality, the first alarm processing of the energy storage device includes: in the case that the voltage conversion abnormality includes an abnormality of each of the at least two voltage conversion units of each of the first voltage conversion modules, performing second-level first alarm processing of the energy storage device; and wherein the second-level alarm level is higher than the first-level alarm level.

[0103] Figure 5 A structural schematic diagram of the energy storage device provided for the third embodiment is shown in FIG. 3. Figure 5 Figure 5 The difference between the third embodiment and the first embodiment is that each first voltage conversion module includes two voltage conversion units (third voltage conversion unit and fourth voltage conversion unit) connected in series, the first voltage conversion module is connected to the power supply end, and the output end of the last voltage conversion unit in the two voltage conversion units connected in series is connected to the primary controller. Figure 2 In the case that the first voltage conversion module 1 is abnormal and the first voltage conversion module 2 is normal, the abnormality combination is determined to be a first abnormality combination of a partial first voltage conversion module abnormality. If the third voltage conversion unit or the fourth voltage conversion unit in the first voltage conversion module 1 is abnormal, the abnormality combination is determined to be a first sub-abnormality combination in the first abnormality combination. If the third voltage conversion unit and the fourth voltage conversion unit in the first voltage conversion module 1 are both abnormal, the abnormality combination is determined to be a second sub-abnormality combination in the first abnormality combination. In the case that the first voltage conversion module 2 is abnormal and the first voltage conversion module 1 is normal, the abnormality combination is determined to be a first abnormality combination of a partial first voltage conversion module abnormality. If the third voltage conversion unit or the fourth voltage conversion unit in the first voltage conversion module 2 is abnormal, the abnormality combination is determined to be a first sub-abnormality combination in the first abnormality combination. If the third voltage conversion unit and the fourth voltage conversion unit in the first voltage conversion module 2 are both abnormal, the abnormality combination is determined to be a second sub-abnormality combination in the first abnormality combination.

[0104] The voltage conversion unit can be used to convert the input voltage to the required voltage. The third voltage conversion unit is used to convert the bus voltage of the energy storage device to an intermediate voltage value, and the fourth voltage conversion unit is used to convert the intermediate voltage value to the rated power supply voltage of the primary controller.

[0105] In some embodiments, the abnormality processing mode of the first power supply abnormality combination includes first-level first alarm processing of the energy storage device, and the abnormality processing mode of the second power supply abnormality combination includes second-level first alarm processing of the energy storage device, and wherein the second-level alarm level is higher than the first-level alarm level. ​

[0106] Exemplarily, the first-level controller performing the first alarm processing of the first level on the energy storage device includes: the first-level controller sending the first alarm information to the computer device.

[0107] Exemplarily, the first-level controller performing the second-level first alarm processing on the energy storage device includes: the first-level controller sending the first alarm information to the computer device, and sending an alarm signal to the alarm module of the energy storage device to make the alarm module generate an alarm.

[0108] In the technical scheme provided by the embodiment of the present application, since each first voltage conversion module includes at least two voltage conversion units connected in series, each voltage conversion unit bears a part of the voltage drop conversion, thereby avoiding the problem that a single voltage conversion unit needs to convert from a higher voltage to the rated supply voltage of the first-level controller, so that the single voltage conversion unit bears the entire voltage conversion pressure in the voltage conversion process, thereby causing the problem of deterioration of the electrical performance of the voltage conversion unit, and thus the probability of deterioration of the electrical performance of the voltage conversion unit can be reduced; and when part of the voltage conversion units are abnormal, it is usually that the part of the voltage conversion units themselves are faulty due to long use time or other problems, and in general, the probability of abnormality of the bus power supply is small, so that low-level alarm processing is performed on the energy storage device, and when all the voltage conversion units are abnormal, it is usually that the abnormality is caused by the abnormality of the bus power supply, for example, unstable voltage output by the bus causes all the voltage conversion units to fail, so that high-level alarm processing is performed on the energy storage device, and thus not only can the potential influence degree of the abnormality of the part of the first voltage conversion modules be used to provide a differentiated treatment priority guide for the operation and maintenance personnel, but also the accuracy of fault diagnosis and the operation and maintenance efficiency of the energy storage device can be significantly improved.

[0109] In some embodiments, the operation data includes an output voltage; and the voltage conversion abnormality is determined according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module, including: in a case where the output voltage of the second voltage conversion module is normal, the output voltages of the plurality of first voltage conversion modules are gradually reduced until the output voltages of the plurality of first voltage conversion modules are all less than a preset voltage, the voltage conversion abnormality is determined as a first-level controller power failure abnormality; and in a case where the voltage conversion abnormality includes abnormality of the plurality of first voltage conversion modules, the second alarm processing and the low-voltage processing are performed on the energy storage device, including: according to the first-level controller power failure abnormality, the black-start switch in the energy storage device is controlled to be closed, so that the second voltage conversion module supplies power to the first-level controller through the black-start switch, and the second alarm processing and the low-voltage processing are performed on the energy storage device.

[0110] Exemplarily, the preset voltage is lower than the rated supply voltage of the first-level controller, and the preset voltage can be the lowest voltage that can maintain the operation of the first-level controller. For example, the preset voltage can be 2 / 3 or 1 / 2 of the rated supply voltage of the first-level controller, and the embodiments of the present application do not limit this.

[0111] In the technical scheme provided in the embodiments of the present application, the black start switch in the energy storage device is controlled to be closed when the output voltages of the plurality of first voltage conversion modules are all less than the preset voltage, so that the black start switch in the energy storage device is controlled to be closed when the primary controller still has power input, thereby avoiding the situation that the black start switch in the energy storage device can be closed only when the primary controller is powered off, and thus the embodiments of the present application can avoid the situation that the control of the primary controller is affected due to the power-off of the primary controller, and the operation reliability of the energy storage device is improved.

[0112] In the technical scheme provided in the embodiments of the present application, the black start switch in the energy storage device is controlled to be closed when the output voltages of the plurality of first voltage conversion modules are all less than the preset voltage, so that the black start switch in the energy storage device is controlled to be closed when the primary controller still has power input, thereby avoiding the situation that the black start switch in the energy storage device can be closed only when the primary controller is powered off, and thus the embodiments of the present application can avoid the situation that the control of the primary controller is affected due to the power-off of the primary controller, and the operation reliability of the energy storage device is improved.

[0113] In some embodiments, the operation data includes the output voltage; and the determination of the voltage conversion abnormality according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module includes: in a case where the output voltage of the second voltage conversion module is normal and the output voltages of the plurality of first voltage conversion modules all do not meet the voltage requirement of the primary controller, determining that the voltage conversion abnormality is a primary controller power supply voltage abnormality; and in a case where the voltage conversion abnormality includes that the plurality of first voltage conversion modules are all abnormal, performing a high-voltage reduction process and a second alarm process on the energy storage device, including: according to the primary controller power supply voltage abnormality, controlling the black start switch in the energy storage device to be closed, and controlling the connection between the power supply end of the energy storage device and the plurality of first voltage conversion modules to be disconnected, so that the second voltage conversion module supplies power to the primary controller through the black start switch, and the high-voltage reduction process and the second alarm process are performed on the energy storage device.

[0114] In the technical scheme provided in the embodiments of the present application, the black start switch in the energy storage device is controlled to be closed when the output voltages of the plurality of first voltage conversion modules are all less than the preset voltage, so that the black start switch in the energy storage device is controlled to be closed when the primary controller still has power input, thereby avoiding the situation that the black start switch in the energy storage device can be closed only when the primary controller is powered off, and thus the embodiments of the present application can avoid the situation that the control of the primary controller is affected due to the power-off of the primary controller, and the operation reliability of the energy storage device is improved.

[0115] For example, the situation that the output voltages of the plurality of first voltage conversion modules are all gradually reduced until the output voltages of the plurality of first voltage conversion modules are all less than the preset voltage, and the primary controller is about to lose power but has not yet completely lost power, can be caused by the problem of abnormal power supply of the bus or the problem of breakdown of the plurality of first voltage conversion modules due to excessive bus voltage.

[0116] In some embodiments, the black start switch in the energy storage device can be controlled to be closed at the same time as the connection between the power supply end of the energy storage device and the plurality of first voltage conversion modules is controlled to be disconnected. In other embodiments, the black start switch in the energy storage device can be controlled to be closed first, and then the connection between the power supply end of the energy storage device and the plurality of first voltage conversion modules is controlled to be disconnected.

[0117] In the technical solutions provided by the embodiments, in the case that the output voltages of the plurality of first voltage conversion modules do not meet the voltage requirement of the primary controller, the black start switch in the energy storage device is controlled to be closed, and the connection between the power supply end of the energy storage device and the plurality of first voltage conversion modules is controlled to be disconnected. Therefore, the control of the primary controller caused by power failure can be avoided, the operation reliability of the energy storage device is improved, and the problem that the output voltages of the plurality of first voltage conversion modules do not meet the voltage requirement of the primary controller, the primary controller cannot be effectively controlled under under-voltage, and the primary controller is easily damaged under over-voltage is avoided, and the control effectiveness and operation reliability of the primary controller are improved.

[0118] In some embodiments, the power supply end includes a bus power supply end and a battery cluster managed by the secondary controller; the energy storage device further includes a third voltage conversion module, the third voltage conversion module and the second voltage conversion module are both connected to the primary controller through the black start switch, the third voltage conversion module is further connected to the battery cluster managed by the secondary controller, and the second voltage conversion module is further connected to the bus power supply end.

[0119] In some embodiments, the down high voltage processing of the energy storage device includes: in the case that the second voltage conversion module is normal, determining a target time length between the current time and the time when the energy storage device is down high voltage according to the remaining high voltage time length of the energy storage device, and starting the down high voltage processing of the energy storage device at the time interval of the target time length.

[0120] For example, in the case that the remaining high voltage time length is less than or equal to a preset high voltage time length, the remaining high voltage time length is determined as the target time length; in the case that the remaining high voltage time length is greater than the preset high voltage time length, the preset high voltage time length is determined as the target time length. In some embodiments, the preset high voltage time length can be a fixed value. In other embodiments, the preset high voltage time length can be determined according to the remaining power of the battery cluster managed by the secondary controller, the power consumption of the primary controller, and the power consumption of the secondary controller.

[0121] In some embodiments, the down high voltage processing of the energy storage device includes: in the case that the second voltage conversion module is abnormal, the down high voltage processing of the energy storage device is performed at the current time.

[0122] The technical scheme provided in the embodiment of the application is characterized in that, the time for different energy storage devices to be subjected to the next high voltage treatment is determined according to whether the second voltage conversion module is abnormal, so that, in the case that the second voltage conversion module is normal, the primary controller does not consume the electric energy of the battery cluster connected with the black start switch, and does not affect the operation of the battery cluster, so that the next high voltage of the energy storage device can be delayed, and not only the utilization rate of the energy storage device can be improved, but also the energy storage device can be maintained in time after the next high voltage of the energy storage device; and in the case that the second voltage conversion module is abnormal, the primary controller consumes the electric energy of the battery cluster connected with the black start switch, and affects the operation of the battery cluster, so that the next high voltage of the energy storage device is processed at the current time, and the battery cluster is isolated as early as possible, thereby improving the operation reliability of the energy storage device.

[0123] In some embodiments, the abnormal treatment of the energy storage device according to the voltage conversion abnormality comprises: in the case that the voltage conversion abnormality comprises the second voltage conversion module abnormality, and all the plurality of first voltage conversion modules are normal, performing third alarm treatment on the energy storage device, and performing the next high voltage treatment on the battery cluster managed by the secondary controller, the third alarm treatment being used to indicate the second voltage conversion module abnormality.

[0124] In some embodiments, the abnormal treatment of the energy storage device according to the voltage conversion abnormality comprises: in the case that the voltage conversion abnormality comprises the second voltage conversion module abnormality, and part of the plurality of first voltage conversion modules are abnormal, performing fourth alarm treatment on the energy storage device, and performing the next high voltage treatment on the battery cluster managed by the secondary controller, the fourth alarm treatment being used to indicate the second voltage conversion module abnormality and the part of the first voltage conversion modules abnormality.

[0125] In some embodiments, the abnormal treatment of the energy storage device according to the voltage conversion abnormality comprises: in the case that the voltage conversion abnormality comprises the second voltage conversion module abnormality, and all the plurality of first voltage conversion modules are abnormal, performing fifth alarm treatment on the energy storage device, and performing the next high voltage treatment on the energy storage device, the fifth alarm treatment being used to indicate the second voltage conversion module abnormality and the plurality of first voltage conversion modules abnormality.

[0126] The second voltage conversion module needs to supply power to the corresponding secondary controller, and the secondary controller manages the corresponding battery cluster. In the case that the second voltage conversion module is abnormal, only the power supply of the secondary controller corresponding to the abnormal second voltage conversion module is affected, and only the control of the battery cluster corresponding to the abnormal second voltage conversion module is affected. Therefore, if the abnormal combination comprises the second voltage conversion module abnormality, the abnormal treatment mode comprises: performing the next high voltage treatment on the battery cluster corresponding to the abnormal second voltage conversion module, so that the influence on other battery clusters that can be normally controlled can be avoided.

[0127] Exemplarily, the third alarm processing on the energy storage device can include at least one of the following: the primary controller sends third alarm information to the computer device, and sends an alarm signal to the alarm module of the energy storage device, so that the alarm module generates an alarm. For example, the third alarm information can include at least one of the following: the identifier of the energy storage device, the identifier of the abnormal second voltage conversion module, the abnormal type, etc.

[0128] Exemplarily, the fourth alarm processing / fifth alarm processing on the energy storage device can include at least one of the following: the primary controller sends fourth alarm information to the computer device, and sends an alarm signal to the alarm module of the energy storage device, so that the alarm module generates an alarm. For example, the fourth alarm information can include at least one of the following: the identifier of the energy storage device, the identifier of the abnormal second voltage conversion module, the identifier of the abnormal first voltage conversion module, the identifier of the abnormal voltage conversion unit, the abnormal type, etc.

[0129] In some embodiments, in the case of an abnormal second voltage conversion module, a third voltage conversion module corresponding to the second voltage conversion module can be used to supply power to the secondary controller connected to the abnormal second voltage conversion module, so that the secondary controller can perform the low-voltage processing on the battery cluster corresponding to the abnormal second voltage conversion module.

[0130] Exemplarily, continuing to refer to Figure 2 to Figure 4 , if the second voltage conversion module 1 is abnormal, the primary controller performs low-voltage processing on the battery cluster 1. For example, the primary controller sends a low-voltage processing instruction to the secondary controller 1, so that the secondary controller 1 controls the main positive relay and the main negative relay connected to the battery cluster 1 to be disconnected, to realize the low-voltage processing of the battery cluster 1. If the second voltage conversion module n is abnormal, the primary controller performs low-voltage processing on the battery cluster n. For example, the primary controller sends a low-voltage processing instruction to the secondary controller n, so that the secondary controller n controls the main positive relay and the main negative relay connected to the battery cluster n to be disconnected, to realize the low-voltage processing of the battery cluster n.

[0131] In the technical scheme provided by the embodiments of the present application, when it is detected that the abnormal combination includes an abnormal second voltage conversion module, the low-voltage processing on the battery cluster corresponding to the abnormal second voltage conversion module is performed, so that the faulty module is quickly isolated, the abnormality is prevented from spreading, the normal operation of the remaining battery clusters is maintained, and the influence on other battery clusters that can be normally controlled is avoided; and in the case of an abnormal second voltage conversion module, different processing is performed on the energy storage device according to different situations that all the first voltage conversion modules are normal, part of the first voltage conversion modules are abnormal, and all the first voltage conversion modules are abnormal, so that the pertinence and effectiveness of the fault disposal of the energy storage device are improved.

[0132] In some embodiments, the energy storage device further includes a third voltage conversion module, which is connected to the battery cluster managed by the secondary controller, and a second voltage conversion module is connected to the bus of the power supply end; in the event of an abnormality in the second voltage conversion module, the third voltage conversion module supplies power to the secondary controller; the high voltage processing of the battery cluster managed by the secondary controller includes: outputting a high voltage reduction command to the secondary controller so that the secondary controller reduces the high voltage of the battery cluster managed by the secondary controller.

[0133] In the technical solution provided in this application embodiment, by supplying power to the secondary controller by the third voltage conversion module in the event of an abnormality in the second voltage conversion module, the problem of the secondary controller being unable to perform high voltage operation on the battery cluster due to power failure can be avoided, thereby improving the control reliability of the energy storage device.

[0134] Figure 6 A schematic diagram of the energy storage device provided in the fourth embodiment is shown below. Figure 6 As shown, Figure 6 Compared to the example Figure 2 The difference in the embodiments is that the energy storage device also includes battery clusters managed by secondary controllers. For example, the energy storage device includes multiple battery clusters (battery cluster 1 to battery cluster n) that correspond one-to-one with multiple secondary controllers. In other embodiments, the correspondence between secondary controllers and battery clusters can be one-to-many. The energy storage device also includes multiple second voltage conversion modules (second voltage conversion module 1 to second voltage conversion module n) and multiple third voltage conversion modules (third voltage conversion module 1 to third voltage conversion module n). Each second voltage conversion module is connected to the bus of another energy storage device, and each third voltage conversion module is connected to the corresponding battery cluster. Both second voltage conversion module i (i is an integer greater than or equal to 1 and less than or equal to n) and third voltage conversion module i are connected to secondary controller i. Both second voltage conversion module n and third voltage conversion module n are also connected to the first conducting terminal of a black-start switch. The second conducting terminal of the black-start switch is connected to a primary controller, and the control terminal of the black-start switch is connected to the primary controller so that the primary controller controls the on / off state of the black-start switch.

[0135] Figure 6 In the illustrated embodiment, the bus connected to the second voltage conversion module is a bus in another energy storage device. In other embodiments, the bus connected to the second voltage conversion module can be a bus in the energy storage device where the second voltage conversion module is located. In still other embodiments, the bus connected to the second voltage conversion module can be a bus in another energy storage device and a bus in the energy storage device where the second voltage conversion module is located, thus providing redundant power to the secondary controller through the dual buses via the second voltage conversion module.

[0136] In some embodiments, the secondary controller preferentially uses the voltage output by the second voltage conversion module, and in the event of an abnormality of the second voltage conversion module, the secondary controller needs to use the voltage output by the third voltage conversion module (the third voltage conversion module serving as an emergency power supply module of the secondary controller). However, since the input voltage of the third voltage conversion module is provided by the battery cluster managed by the secondary controller, in the event of an abnormality of the first conversion unit, the electrical energy of the battery cluster managed by the secondary controller needs to be consumed, which may cause the risk of voltage imbalance of the battery cluster in the energy storage system, and thus the battery cluster managed by the secondary controller needs to be subjected to high-voltage reduction.

[0137] Figure 7 A structural schematic diagram of the energy storage device provided for the fifth embodiment is shown in FIG. 6. As shown in FIG. 6, the energy storage device further includes a black start switch. The primary controller is connected to the second voltage conversion module and the third voltage conversion module through the black start switch. In some embodiments, the black start switch can be closed in the event of power failure of the primary controller, or can be closed according to a low-voltage signal output by the primary controller, so as to enable the second voltage conversion module to supply power to the primary controller, and in the event of an abnormality of the second voltage conversion module, the third voltage conversion module supplies power to the primary controller. The energy storage device is subjected to high-voltage reduction, which includes subjecting all the battery clusters in the energy storage device to high-voltage reduction. Figure 7

[0138] Exemplarily, the energy storage device includes a plurality of second voltage conversion modules, and the primary controller is connected to the second voltage conversion module corresponding to the target battery cluster and the third voltage conversion module through the black start switch. For example, the target battery cluster can be the battery cluster n, and in other embodiments, the target battery cluster can be the battery cluster 1 or other battery clusters.

[0139] Exemplarily, the black start switch can include a normally closed relay.

[0140] ​In the case that all the first voltage conversion modules are normal or some of the first voltage conversion modules are abnormal, in the case that the power supply is normal, the primary controller controls the black start switch to be in an open state (for example, the primary controller sends a high voltage signal to the black start switch to make the black start switch open). In the case that all the first voltage conversion modules are abnormal, the primary controller is powered off, and the primary controller cannot output a high voltage signal to the black start switch. Since the black start switch is a normally closed relay, the black start switch is automatically switched to a closed state. Since the second voltage conversion module can take power from the battery cluster, the second voltage conversion module can supply power to the primary controller, that is, the second voltage conversion module supplies power to the primary controller as an emergency power supply module of the primary controller to restore the power supply of the primary controller. In some cases, in the case that the second voltage conversion module is abnormal, a third voltage conversion module is used as an emergency power supply module of the primary controller to supply power to the primary controller. In this way, the primary controller can perform the high voltage reduction process on all the battery clusters in the energy storage device in the case that all the first voltage conversion modules are abnormal.

[0141] In some embodiments, the high voltage reduction process on all the battery clusters in the energy storage device can include: sending a high voltage reduction instruction to each secondary controller in the energy storage device to make each secondary controller control the main positive relay and the main negative relay connected to the battery cluster managed by each secondary controller to be opened, so that all the battery clusters in the energy storage device are subjected to the high voltage reduction process.

[0142] In some embodiments, in order to avoid the problem that the primary controller is powered off after the primary controller is powered off, and the black start switch is closed, resulting in control abnormality of the primary controller, the primary controller can output a low voltage signal to the black start switch (or the primary controller no longer outputs a voltage signal to the black start switch) when detecting the supply voltage (or the output voltage of the first voltage conversion module) is less than or equal to a preset voltage, so that the black start switch is closed, and the second voltage conversion module can continue to supply power to the primary controller, thereby avoiding the problem of control abnormality of the primary controller caused by power failure.

[0143] In some embodiments, in the case that the primary controller is powered on, the primary controller outputs a low voltage signal to the black start switch (or the primary controller no longer outputs a voltage signal to the black start switch) to make the black start switch continuously conductive, so that the primary controller has sufficient time to perform the high voltage reduction process on all the battery clusters in the energy storage device. After the high voltage reduction process on all the battery clusters is completed, the primary controller can enter a low power consumption mode or perform a shutdown operation to reduce the power consumption of the battery cluster. For example, the secondary controller can also enter a low power consumption mode or perform a shutdown operation to reduce the power consumption of the battery cluster.

[0144] The technical scheme provided in the embodiment of the application is characterized in that a black start switch is arranged in the energy storage device, and the black start switch is closed when the primary controller loses power, so that an emergency power supply path of the second voltage conversion module and the third voltage conversion module to the primary controller is established, and the primary controller can perform the operation of performing high voltage reduction on all battery clusters in the energy storage device, thereby avoiding the problem that the primary controller cannot perform high voltage reduction on all battery clusters in the energy storage device when the primary controller loses power, and improving the emergency disposal reliability of the energy storage device when the primary controller loses power. In addition, when high voltage reduction needs to be performed on the energy storage device, the high voltage reduction operation is uniformly performed on all battery clusters, and the global high voltage reduction manner can completely cut off all high voltage outputs of the energy storage device, thereby improving the effectiveness of the primary controller in performing high voltage control on the energy storage device.

[0145] Based on the same inventive concept, the embodiment of the application also provides an energy storage device, which comprises: a primary controller, a plurality of first voltage conversion modules, a secondary controller and a second voltage conversion module, the plurality of first voltage conversion modules are connected with the primary controller, the second voltage conversion module is connected with the secondary controller, the primary controller is in communication connection with the secondary controller, and the second voltage conversion module and the plurality of first voltage conversion modules are connected with a power supply end in the energy storage device; the primary controller is used for acquiring running data of the plurality of first voltage conversion modules; receiving running data of the second voltage conversion module sent by the secondary controller; the running data of the second voltage conversion module is acquired by the secondary controller; determining voltage conversion abnormity according to the running data of the plurality of first voltage conversion modules and the running data of the second voltage conversion module; and performing abnormal treatment on the energy storage device according to the voltage conversion abnormity.

[0146] In some embodiments, the energy storage device further comprises a black start switch and a third voltage conversion module, the power supply end comprises a bus power supply end and a battery cluster managed by the secondary controller; the third voltage conversion module and the second voltage conversion module are connected with the primary controller through the black start switch, and the third voltage conversion module and the second voltage conversion module are also connected with the secondary controller; the third voltage conversion module is further connected with the battery cluster managed by the secondary controller, and the second voltage conversion module is further connected with the bus power supply end.

[0147] Figure 8 The structural schematic diagram of the energy storage device provided for the sixth embodiment is as shown in Figure 8 The energy storage device comprises: a primary controller, a plurality of first voltage conversion modules (for example, the first voltage conversion module 1 and the first voltage conversion module 2 shown in Figure 8 ), a secondary controller, a second voltage conversion module (shown as a power supply unit 5 in Figure 8 ), and a third voltage conversion module (shown as a power supply unit 6 in Figure 8The plurality of first voltage conversion modules are all connected with the primary controller, the second voltage conversion module and the third voltage conversion module are both connected with the secondary controller, the second voltage conversion module and the third voltage conversion module are also both connected with the primary controller through the black start relay, the second voltage conversion module is also connected with the bus of another energy storage device, and the third voltage conversion module is connected with the target battery cluster (for example, the battery cluster n is shown) Figure 8 The primary controller is in communication connection with the secondary controller.

[0148] The positive electrode of each battery cluster is connected with the positive bus of the energy storage device through the main positive relay, the negative electrode of each battery cluster is connected with the negative bus of the energy storage device through the main negative relay, and the positive electrode of each energy storage battery cluster is also connected with the positive bus of the energy storage device through the pre-charging resistor and the pre-charging relay in sequence.

[0149] The first voltage conversion module 1 comprises the power supply unit 1 and the power supply unit 3, the first voltage conversion module 2 comprises the power supply unit 2 and the power supply unit 4, the primary controller is connected with the bus of the energy storage device through the power supply unit 1 and the power supply unit 3 in sequence, and the primary controller is also connected with the bus of another energy storage device through the power supply unit 2 and the power supply unit 4 in sequence.

[0150] The secondary controller is connected with the bus of another energy storage device through the power supply unit 5, and the secondary controller is also connected with the battery cluster n through the power supply unit 6.

[0151] The primary controller is connected with the battery cluster n through the black start switch (for example, the black start relay, which is a normally closed relay) and the power supply unit 6 in sequence, and the primary controller is also connected with the bus of another energy storage device through the black start switch and the power supply unit 5 in sequence.

[0152] In the embodiment of Figure 8 In some implementation scenarios, the connection of the power supply unit with the bus not only connects the positive bus, but also connects the negative bus, and the connection of the power supply unit with the battery cluster not only connects the positive electrode of the battery cluster, but also connects the negative electrode of the battery cluster.

[0153] In the embodiment of Figure 8In the embodiments shown, the connection relationship between the secondary controller, battery cluster n, second voltage conversion module, and third voltage conversion module is merely illustrated. It shows that battery cluster n corresponds to one second voltage conversion module, one third voltage conversion module, and one secondary controller. However, in some implementation scenarios, the energy storage device includes multiple secondary controllers, multiple second voltage conversion modules, and multiple third voltage conversion modules. The correspondence between the secondary controller and the battery cluster can be one-to-one or one-to-many. The secondary controller controls the relays connected to both ends of the corresponding battery cluster. The correspondence between the second voltage conversion module and the secondary controller can be one-to-one, one-to-many, or many-to-one. The correspondence between the third voltage conversion module and the secondary controller can also be one-to-one, one-to-many, or many-to-one. The connection relationship follows... Figure 8 The examples in this application can be used as a reference, and the embodiments in this application will not be described in detail.

[0154] exist Figure 8 In the embodiment shown, the primary controller is connected to battery cluster n via a black start switch; however, in some implementations, the primary controller can be connected to other battery clusters via a black start switch.

[0155] exist Figure 8 In one embodiment, the other energy storage device includes not only the multiple battery clusters shown, but also a primary controller, multiple first voltage conversion modules (first voltage conversion module 1 and first voltage conversion module 2), a secondary controller, a second voltage conversion module, and a third voltage conversion module, etc. The energy storage device has the same circuit structure as the other energy storage device.

[0156] Figure 9 The diagram illustrates the architecture of an energy storage device provided in some embodiments. Multiple secondary controllers (secondary controller 1, secondary controller 2 to secondary controller n) communicate with a primary controller. The primary controller also acquires operating data from power supply units 1 to 4, and each secondary controller acquires operating data from power supply unit 5. Each secondary controller sends the acquired operating data of power supply unit 5 to the primary controller. The primary controller also communicates with a power controller, which controls the input power and / or input parameters of the energy storage device. The primary controller is also connected to a black-start switch for controlling its on / off state.

[0157] The following example uses a power supply unit 5, and Table 1 illustrates the exception handling methods for each exception combination. Table 1 shows examples of the exception levels and exception handling methods for each exception combination:

[0158] Table 1

[0159]

[0160] Among them, the abnormal situation Y4, Y6, Y7 is a high abnormal level, the main reason is that the primary controller cannot take power from the first voltage conversion module 1 and the first voltage conversion module 2, at this time the primary controller will be temporarily powered off passively, but since the black start switch is a normally closed switch, the primary controller will close the black start loop of the primary controller (i.e. the loop of the primary controller through the black start switch and the power supply unit 6 to the battery cluster) after a short power failure, that is, the primary controller needs to consume the power of the battery cluster, and there is a risk of continuous consumption of the power of a single battery cluster.

[0161] The following abnormal situations Y1 to Y7 are exemplarily explained:

[0162] Y1: When any one of the power supply units 1, 2, 3, 4, 5 is abnormal, because the primary controller of the energy storage device is redundantly powered, one abnormality, the primary controller is still normally powered, therefore it is defined as a low-impact power supply unit combination, and the level is classified as A-level abnormality, the first level of the first alarm processing; any one of the power supply units 1-4 is abnormal, the third alarm processing is performed on the battery cluster under high voltage.

[0163] Y2: When the power supply units 4 and 2 trigger an abnormality or the power supply units 3 and 1 trigger an abnormality, one combination triggers, because the primary controller of the energy storage device is redundantly powered, one abnormality, the primary controller is still normally powered, the power supply unit combination has a certain impact on the energy storage device, but does not affect the system usage, and the level is classified as B-level abnormality, the second level of the first alarm processing is performed, for example, abnormality reporting and signal warning are performed.

[0164] Y3: When any one of the power supply units 1-4 is abnormal in combination with the power supply unit 5, the primary controller is still normally powered, but the secondary controller will consume the power of the battery cluster through the power supply unit 6, which is a power supply unit combination that has a certain impact on the energy storage device and the abnormality of the power supply unit corresponding to the battery cluster, and the level is classified as C-level abnormality, the fourth alarm processing is performed on the battery cluster under high voltage. For example, abnormality reporting, signal warning, and abnormal battery cluster under high voltage processing are performed.

[0165] Y4: When one of the power supply unit combinations of 1 and 2, 3 and 4, 3 and 2, 4 and 1 is abnormal in combination with the power supply unit 5, the primary controller is abnormal, the primary controller will use the power supply unit 6 corresponding to the battery cluster, therefore affecting the normal use of the energy storage device, the level is classified as D-level abnormality, the primary controller is powered off temporarily, and the power is taken from the battery cluster, there is a risk of continuous consumption of the power of a single battery cluster, the energy storage device is under high voltage, and the second alarm processing is performed. For example, abnormality reporting, signal warning, and energy storage device under high voltage processing are performed.

[0166] Y5: When the abnormal combination of the power supply unit 4 combined with the combination of the power supply units 2, 3 and 1 and the abnormal combination of the power supply unit 5, the two abnormal combinations do not affect the main power supply of the primary controller, and the power supply unit combination in which the battery cluster corresponds to the abnormal power supply unit has a certain influence on the energy storage device, and the power supply unit combination in which the battery cluster corresponds to the abnormal power supply unit is classified as a C-level abnormality. The high voltage under the battery cluster is processed by the fourth alarm.

[0167] Y6: When the abnormal combination of the power supply unit 134, 234, 124, 123, 125, 235, 345, 145 will cause the main power supply of the primary controller to be abnormal, the power supply of the primary controller to be abnormal, and the primary controller to use the power supply unit 6 corresponding to the battery cluster, thereby affecting the normal use of the energy storage device. The level is classified as a D-level abnormality. The primary controller takes power from the battery cluster after a short power failure, has a risk of continuously consuming the power of a single battery cluster, and performs the second alarm processing on the high voltage under the energy storage device.

[0168] Y7: When the abnormal combination of the power supply unit 1234, 1235, 1345, 2345, 1245 will cause the main power supply of the primary controller to be abnormal, the power supply of the primary controller to be abnormal, and the primary controller to use the power supply unit 6 corresponding to the battery cluster, thereby affecting the normal use of the energy storage device. The level is classified as a D-level abnormality. The primary controller takes power from the battery cluster after a short power failure, has a risk of continuously consuming the power of a single battery cluster, and performs the second alarm processing on the high voltage under the energy storage device.

[0169] Based on the same inventive concept, the embodiments of the present application also provide a power supply abnormality processing device for implementing the power supply abnormality processing method described above. The implementation scheme of the device for solving the problem is similar to the implementation scheme described in the above method, so the specific limitations in one or more power supply abnormality processing device embodiments provided below can be referred to the limitations of the power supply abnormality processing method in the above, which will not be repeated here.

[0170] In an exemplary embodiment, Figure 10 The structural schematic diagram of the power supply abnormality processing device provided for some embodiments is shown in Figure 10 As shown in the figure, the power supply abnormality processing device 1000 comprises:

[0171] The acquisition module 1001 is configured to acquire operation data of a plurality of first voltage conversion modules of an energy storage device; the plurality of first voltage conversion modules redundantly supply power to a primary controller of the energy storage device, and the plurality of first voltage conversion modules are connected to a power supply end of the energy storage device.

[0172] The communication module 1002 is configured to receive operation data of the second voltage conversion module sent by the secondary controller of the energy storage device; the operation data of the second voltage conversion module is obtained by the secondary controller; the second voltage conversion module supplies power to the secondary controller in the energy storage device; and the second voltage conversion module is connected to the power supply end in the energy storage device.

[0173] The determination module 1003 is configured to determine voltage conversion abnormity according to the operation data of the plurality of first voltage conversion modules and the operation data of the second voltage conversion module.

[0174] The processing module 1004 is configured to perform abnormality processing on the energy storage device according to the voltage conversion abnormity.

[0175] The above description of the device embodiments is similar to the description of the method embodiments, and has similar beneficial effects as the method embodiments. For technical details not disclosed in the device embodiments of the present application, please refer to the description of the method embodiments for understanding.

[0176] Each module in the above power supply abnormality processing device can be realized by software, hardware, or a combination thereof, in whole or in part. Each module can be embedded in or independent of the processor in the controller in hardware form, or can be stored in the memory in the controller in software form, so as to be called and executed by the processor to perform the operations corresponding to each module.

[0177] In one exemplary embodiment, Figure 11A structural diagram of a controller is provided for some embodiments, which can be the primary controller in any of the above embodiments. The controller includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the controller is used to provide computing and control capabilities. The memory of the controller includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The input / output interface of the controller is used to exchange information between the processor and external devices. The communication interface of the controller is used to communicate with external terminals in a wired or wireless manner. The wireless manner can be realized through Wireless Fidelity (WIFI), mobile cellular network, Near Field Communication (NFC) or other technologies. The computer program is executed by the processor to implement a power supply exception processing method. The display unit of the controller is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the controller can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the controller, or an external keyboard, touchpad or mouse, etc.

[0178] Those skilled in the art can understand that, Figure 11 The structure shown in the above embodiment is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the controller to which the scheme of the present application is applied. The specific controller can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0179] For example, the controller includes a memory and a processor, the memory stores a computer program, and the processor executes the computer program to implement the steps of the method of any of the above embodiments.

[0180] In one embodiment, a computer readable storage medium is provided, and a computer program is executed by a processor to implement the steps of the method provided by any of the above embodiments.

[0181] In one embodiment, a computer program product is provided, which includes a computer program, and the computer program is executed by a processor to implement the steps of the method provided by any of the above embodiments.

[0182] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing relevant hardware, and the computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, the computer program can include the processes of the above-mentioned embodiment methods.

[0183] The processor, each functional module or each functional unit in any embodiment of the present application can include an integration of any one or more of the following: a general purpose processor, an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a central processing unit (CPU), a graphics processing unit (GPU), a neural-network processing units (NPU), a controller, a microcontroller, a microprocessor, a programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, a quantum computing-based data processing logic device, an artificial intelligence (AI) processor, and the like. The general purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0184] The memory or computer readable storage medium in any of the embodiments of the present application can include at least one of a non-volatile memory and a volatile memory. The non-volatile memory includes integration of one or more of the following: Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Ferromagnetic Random Access Memory (FRAM), Flash Memory, magnetic random access memory, optical disk, Compact Disc Read-Only Memory (CD-ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, volatile memory, and the like. The volatile memory includes integration of one or more of the following: Random Access Memory (RAM) or external cache memory, and the like. As an illustration but not limitation, the RAM can be in various forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), and the like.

[0185] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictions, it should be considered as the scope of the present application.

[0186] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method for handling power supply anomalies, characterized in that, The method includes: The system acquires operational data from multiple first voltage conversion modules of the energy storage device; the multiple first voltage conversion modules redundantly supply power to the primary controller in the energy storage device, and the multiple first voltage conversion modules are connected to the power supply terminal of the energy storage device. The system receives operating data from the second voltage conversion module sent by the secondary controller of the energy storage device; the operating data of the second voltage conversion module is acquired by the secondary controller; the second voltage conversion module supplies power to the secondary controller in the energy storage device, and the second voltage conversion module is connected to the power supply terminal in the energy storage device; the operating data includes the output voltage; When the output voltage of the second voltage conversion module is normal, the output voltage of the plurality of first voltage conversion modules gradually decreases until the output voltage of the plurality of first voltage conversion modules is less than the preset voltage, then the power failure of the first-level controller is determined to be abnormal. According to the power failure of the primary controller, the black start switch in the energy storage device is closed, so that the second voltage conversion module supplies power to the primary controller through the black start switch, and performs high voltage reduction and second alarm processing on the energy storage device.

2. The method according to claim 1, characterized in that, The method further includes: If some of the multiple first voltage conversion modules malfunction, the energy storage device will be given a first alarm.

3. The method according to claim 2, characterized in that, The first alarm processing for the energy storage device includes: Based on the number of abnormal first voltage conversion modules among the plurality of first voltage conversion modules and / or the priority of the abnormal first voltage conversion modules, the energy storage device is subjected to a first alarm process.

4. The method according to claim 2, characterized in that, Each of the first voltage conversion modules includes at least two voltage conversion units connected in series; the first alarm processing for the energy storage device in the event of a partial malfunction among the plurality of first voltage conversion modules includes: In the event that some voltage conversion units in at least two voltage conversion units of each abnormal first voltage conversion module are abnormal, the energy storage device shall be subjected to a first-level first alarm process. If at least two voltage conversion units of each abnormal first voltage conversion module are abnormal, the energy storage device shall be subjected to a second-level first alarm processing; wherein the alarm level of the second level is higher than the alarm level of the first level.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: If the output voltage of the second voltage conversion module is normal, but the output voltage of the plurality of first voltage conversion modules does not meet the voltage requirements of the first-level controller, it is determined that the power supply voltage of the first-level controller is abnormal. If the power supply voltage of the primary controller is abnormal, the black start switch in the energy storage device is closed, and the connection between the power supply terminal of the energy storage device and the plurality of first voltage conversion modules is disconnected, so that the second voltage conversion module supplies power to the primary controller through the black start switch, and performs high voltage reduction processing and second alarm processing on the energy storage device.

6. The method according to any one of claims 1 to 4, characterized in that, The power supply terminal includes a bus power supply terminal and a battery cluster managed by the secondary controller; the energy storage device further includes a third voltage conversion module, both the third voltage conversion module and the second voltage conversion module are connected to the primary controller via a black start switch in the energy storage device, the third voltage conversion module is also connected to the battery cluster managed by the secondary controller, and the second voltage conversion module is also connected to the bus power supply terminal; the high-voltage processing of the energy storage device includes: When the second voltage conversion module is working properly, the target duration between the current time and the time when the energy storage device is de-energized is determined based on the remaining high voltage duration of the energy storage device, and the energy storage device is de-energized at intervals of the target duration starting from the current time. In the event of a malfunction in the second voltage conversion module, the energy storage device is subjected to a high-voltage treatment at the current moment.

7. The method according to any one of claims 1 to 4, characterized in that, The method further includes: If the second voltage conversion module malfunctions and all the first voltage conversion modules are normal, a third alarm is triggered on the energy storage device, and the battery cluster managed by the secondary controller is subjected to a high voltage reduction. The third alarm is used to indicate that the second voltage conversion module is malfunctioning. In the event that the second voltage conversion module is malfunctioning, and some of the first voltage conversion modules are malfunctioning, a fourth alarm is triggered on the energy storage device, and the battery cluster managed by the secondary controller is subjected to a high voltage reduction. The fourth alarm is used to indicate that the second voltage conversion module is malfunctioning and some of the first voltage conversion modules are malfunctioning. If the second voltage conversion module malfunctions and all of the first voltage conversion modules malfunction, a fifth alarm is triggered on the energy storage device, and the energy storage device is subjected to a high voltage reduction. The fifth alarm is used to indicate that the second voltage conversion module malfunctions and all of the first voltage conversion modules malfunction.

8. The method according to claim 7, characterized in that, The energy storage device further includes a third voltage conversion module, which is connected to the battery cluster managed by the secondary controller. The second voltage conversion module is connected to the bus of the power supply terminal. In the event of an abnormality in the second voltage conversion module, the third voltage conversion module supplies power to the secondary controller. The high-voltage processing of the battery clusters managed by the secondary controller includes: A high-voltage command is output to the secondary controller so that the secondary controller applies a high voltage to the battery clusters managed by the secondary controller.

9. An energy storage device, characterized in that, The energy storage device includes: a primary controller, multiple first voltage conversion modules, a secondary controller, and a second voltage conversion module. The multiple first voltage conversion modules are all connected to the primary controller, and the second voltage conversion module is connected to the secondary controller. The primary controller and the secondary controller are communicatively connected. The second voltage conversion module and the multiple first voltage conversion modules are all connected to the power supply terminal of the energy storage device. The primary controller is used to acquire the operating data of the plurality of first voltage conversion modules; and to receive the operating data of the second voltage conversion module sent by the secondary controller; the operating data of the second voltage conversion module is acquired by the secondary controller; the operating data includes the output voltage; The primary controller is also used to determine a power failure when the output voltage of the second voltage conversion module is normal and the output voltages of the plurality of first voltage conversion modules gradually decrease until the output voltages of the plurality of first voltage conversion modules are all less than a preset voltage; and to control the black start switch in the energy storage device to close according to the power failure of the primary controller, so that the second voltage conversion module supplies power to the primary controller through the black start switch, thereby performing high voltage reduction processing and second alarm processing on the energy storage device.

10. The energy storage device according to claim 9, characterized in that, The energy storage device also includes a black start switch and a third voltage conversion module, and the power supply end includes a bus power supply end and a battery cluster managed by the secondary controller; The third voltage conversion module and the second voltage conversion module are both connected to the first-level controller via the black start switch, and the third voltage conversion module and the second voltage conversion module are also both connected to the second-level controller; The third voltage conversion module is also connected to the battery cluster managed by the secondary controller, and the second voltage conversion module is also connected to the bus power supply terminal.

11. An energy storage system, characterized in that, The energy storage system includes a plurality of energy storage devices as described in claim 9 or 10.

12. A power supply anomaly handling device, characterized in that, The power supply anomaly handling device includes: An acquisition module is used to acquire operating data of multiple first voltage conversion modules of the energy storage device; the multiple first voltage conversion modules provide redundant power to the primary controller in the energy storage device, and the multiple first voltage conversion modules are connected to the power supply terminal of the energy storage device. A communication module is used to receive operating data from the second voltage conversion module sent by the secondary controller of the energy storage device; the operating data of the second voltage conversion module is acquired by the secondary controller; the second voltage conversion module supplies power to the secondary controller in the energy storage device; the second voltage conversion module is connected to the power supply terminal in the energy storage device; the operating data includes output voltage; The determination module is used to determine that the primary controller is abnormally powered when the output voltage of the second voltage conversion module is normal and the output voltages of the plurality of first voltage conversion modules gradually decrease until the output voltages of the plurality of first voltage conversion modules are all less than a preset voltage. The processing module is used to control the black start switch in the energy storage device to close when the primary controller fails to power, so that the second voltage conversion module supplies power to the primary controller through the black start switch, and performs high voltage reduction processing and second alarm processing on the energy storage device.

13. A controller, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the method according to any one of claims 1 to 8.

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

15. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 1 to 8.

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