Energy storage converter and energy storage system

Abstract

The embodiments of the present application relate to the field of energy storage and provide an energy storage converter and an energy storage system. The energy storage converter includes: multiple cooling devices and a detection circuit, the detection circuit includes an electrically connected main control circuit, an isolation circuit, a feedback circuit and a gating module, the feedback circuit transmits the feedback signal output by the cooling device to the main control circuit in real time, and the feedback signal represents the operating status of the cooling device; the gating module is used to sequentially disconnect or connect the paths between different cooling devices and the feedback circuit according to the gating control signal, the gating control signal is a signal output by the main control circuit to the gating module through the isolation circuit, and the main control circuit is at least used to determine the location of the faulty device in the multiple cooling devices according to the corresponding feedback signal when the gating module disconnects or connects the paths between different cooling devices and the feedback circuit. The energy storage converter can independently determine the status of each fan and is adaptable to both RD and FG feedback mechanisms, saving costs and improving detection accuracy.

Description

Technical Field

[0001] The present application relates to the field of energy storage, and in particular to an energy storage converter and an energy storage system. Background Art

[0002] Currently, there are two common fan feedback signals: FG feedback and RD feedback. FG (Frequency Generator) feedback is a speed feedback mechanism that generates PWM pulse signals to reflect fan speed. RD (Rotation Detection) feedback is an operating status detection mechanism, typically used for alarm signals.

[0003] In energy storage systems using air cooling, multiple fans are typically required to dissipate heat for various components in the equipment (such as dissipating heat for IGBT modules in PCSs). However, existing fan control and detection circuits cannot determine which fan is faulty when a fan anomaly is detected. They must stop all fans simultaneously, making it difficult to troubleshoot, locate, repair, or replace the fan. Furthermore, existing fan control and detection circuits only support RD feedback fans and cannot control FG feedback fans. Summary of the Invention

[0004] The embodiments of the present application provide an energy storage converter and an energy storage system, which can at least independently determine the status of each fan and are adaptable to both RD and FG feedback mechanisms, thereby saving costs and improving detection accuracy.

[0005] According to some embodiments of the present application, on the one hand, an energy storage converter is provided in accordance with an embodiment of the present application, comprising: a plurality of cooling devices; a detection circuit for the cooling device, wherein the detection circuit comprises an electrically connected main control circuit, an isolation circuit, a feedback circuit and a gating module, wherein a first output terminal of the main control circuit is electrically connected to a first input terminal of the isolation circuit, a feedback output terminal of the isolation circuit is electrically connected to a total input terminal of the gating module, a sub-input terminal of the gating module is respectively used to be electrically connected to each of the cooling devices, an output terminal of the gating module is electrically connected to an input terminal of the feedback circuit, an output terminal of the feedback circuit is electrically connected to a second input terminal of the isolation circuit, and a second The output end is electrically connected to the main control circuit; wherein, the feedback circuit is used to transmit the feedback signal output by the cooling device to the main control circuit in real time, and the feedback signal represents the operating status of at least one of the cooling devices; the gating module is used to sequentially disconnect or connect the paths between different cooling devices and the feedback circuit according to the gating control signal, and the gating control signal is a signal output by the main control circuit to the gating module through the isolation circuit, and the main control circuit is at least used to determine the location of the faulty device among the multiple cooling devices according to the corresponding feedback signal when the gating module disconnects or connects the paths between different cooling devices and the feedback circuit.

[0006] In some embodiments, the gating module includes: a feedback decoding module, the input end of the feedback decoding module is electrically connected to the feedback output end of the isolation circuit, and is used to input the gating control signal; a plurality of feedback on-off modules, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, and the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit.

[0007] In some embodiments, the feedback on-off module includes at least one of a MOS transistor, a BJT, and a logic AND gate.

[0008] In some embodiments, the detection circuit also includes: a driving circuit, the input end of the driving circuit is electrically connected to the driving output end of the isolation circuit, and is used to input a driving control signal. The driving control signal is output by the main control circuit to the driving circuit through the isolation circuit, and the driving control signal is used to drive each of the cooling devices to operate.

[0009] In some embodiments, the detection circuit further includes: a drive decoding module, the input end of the drive decoding module is electrically connected to the isolation circuit, and is used to input a selection drive signal, the selection drive signal is output by the main control circuit to the drive decoding module through the isolation circuit, and the selection drive signal is used to independently drive each of the cooling devices to operate or shut down; multiple drive on-off modules, the first input end of the drive on-off module is electrically connected to the output end of the drive decoding module, the second input end of the drive on-off module is electrically connected to the output end of the drive circuit, and the output end of the drive on-off module is used to be electrically connected to the corresponding cooling device.

[0010] In some embodiments, the gating module includes a multiplexing switch.

[0011] According to some embodiments of the present application, another aspect of the embodiments of the present application provides a method for detecting a cooling device, which is applied to a main control circuit in a detection circuit of a cooling device of any one of the energy storage converters. The detection method includes: determining a feedback signal type of the cooling device, where the feedback signal type is a first type or a second type, the first type being a digital level signal, and the second type being a PWM signal; when the feedback signal type of the cooling device is the first type and there is a faulty device among the multiple cooling devices, sending a gating control signal to a gating module, and determining the location of the faulty device among the multiple cooling devices based on the feedback signal corresponding to when the gating module disconnects or connects different paths between the cooling devices and the feedback circuit; when the feedback signal type of the cooling device is the second type, sending the gating control signal to the gating module, and determining whether there is a faulty device among the multiple cooling devices and determining the location of the faulty device if the faulty device exists based on the feedback signal corresponding to when the gating module disconnects or connects different paths between the cooling devices and the feedback circuit.

[0012] In some embodiments, the feedback signal type of the cooling device is the first type. Before the selection control signal is sent to the selection module through the isolation circuit, the method also includes: obtaining the feedback signal of the cooling device in real time; when the feedback signal is at a low level, determining that the faulty device does not exist among the multiple cooling devices; when the feedback signal is at a high level, determining that the faulty device exists among the multiple cooling devices.

[0013] In some embodiments, the gating module includes a feedback decoding module and a plurality of feedback on-off modules, the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit, and when the feedback signal type of the cooling device is the first type and there is the faulty device among the plurality of cooling devices, the gating control signal is sent to the gating module, and the gating module is used to disconnect or connect different cooling devices and the cooling devices according to the gating module. The feedback signal corresponding to the path between the feedback circuit determines the position of the faulty device among the multiple cooling devices, including: when the feedback signal type of the cooling device is the first type and the faulty device exists among the multiple cooling devices, sending the selection control signal to the feedback decoding module, so that the feedback on-off module sequentially disconnects the paths between different cooling devices and the feedback circuit according to the signal of the feedback decoding module; obtaining the feedback signal corresponding to the disconnection of the paths between different cooling devices and the feedback circuit; and when the feedback signal is at a low level, determining that the corresponding closed cooling device is the faulty device.

[0014] In some embodiments, the gating module includes a feedback decoding module and a plurality of feedback on-off modules, the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit, the detection circuit also includes a driving decoding module and a plurality of driving on-off modules, the driving decoding module is used to input the gating driving signal, the first input end of the driving on-off module is electrically connected to the output end of the driving decoding module, the output end of the driving on-off module is used to be electrically connected to the corresponding cooling device, when the feedback signal type of the cooling device is the first type and the faulty device exists among the plurality of cooling devices, the gating control signal is sent to the gating module, and according to When the gating module disconnects or connects the paths between different cooling devices and the feedback circuit, the corresponding feedback signal determines the location of the faulty device among the multiple cooling devices, including: when the feedback signal type of the cooling device is the first type and the faulty device exists among the multiple cooling devices, controlling all the cooling devices to be turned off; sending the gating control signal to the feedback decoding module and sending the gating drive signal to the drive decoding module, so that the feedback on-off module sequentially connects the paths between different cooling devices and the feedback circuit according to the signal of the feedback decoding module and the drive on-off module sequentially drives the corresponding cooling devices to operate according to the signal of the drive decoding module; obtaining the feedback signals corresponding to the operation of different cooling devices; and determining that the corresponding operating cooling device is the faulty device when the feedback signal is at a high level.

[0015] In some embodiments, the gating module includes a feedback decoding module and a plurality of feedback on-off modules, the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit, the detection circuit also includes a driving decoding module and a plurality of driving on-off modules, the driving decoding module is used to input the gating driving signal, the first input end of the driving on-off module is electrically connected to the output end of the driving decoding module, the output end of the driving on-off module is used to be electrically connected to the corresponding cooling device, and when the feedback signal type of the cooling device is the first type and there is the faulty device among the plurality of cooling devices, the gating control signal is sent to the gating module. The module is configured to determine the position of a faulty device among the plurality of cooling devices according to the feedback signal corresponding to when the gating module disconnects or connects the path between different cooling devices and the feedback circuit, including: when the feedback signal type of the cooling device is the first type and the faulty device exists among the plurality of cooling devices, sending the gating control signal to the feedback decoding module and sending the gating drive signal to the drive decoding module, so that the feedback on-off module sequentially disconnects the path between different cooling devices and the feedback circuit according to the signal of the feedback decoding module and the drive on-off module sequentially controls the corresponding cooling devices to be turned off according to the signal of the drive decoding module; obtaining the feedback signal corresponding to when different cooling devices are turned off; and when the feedback signal is at a low level, determining that the corresponding closed cooling device is the faulty device.

[0016] In some embodiments, the gating module includes a feedback decoding module and a plurality of feedback on-off modules, the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit, and when the feedback signal type of the cooling device is the second type, the gating control signal is sent to the gating module, and the corresponding feedback signal when the gating module disconnects or connects the path between different cooling devices and the feedback circuit is determined to determine whether there is the cooling device in the plurality of cooling devices. A faulty device and determining the location of the faulty device in the presence of the faulty device, comprising: sending the selection control signal to the feedback decoding module, so that the feedback on-off module sequentially switches on the paths between different cooling devices and the feedback circuit according to the signal of the feedback decoding module, and the switching on time is a preset time; obtaining the feedback signal corresponding to when the paths between different cooling devices and the feedback circuit are switched on; determining that the corresponding cooling device has no fault when the frequency and duty cycle of the feedback signal are both within the corresponding preset range; and determining that the corresponding cooling device is the faulty device when at least one of the frequency and duty cycle of the feedback signal is not within the corresponding preset range.

[0017] In some embodiments, the gating module includes a feedback decoding module and multiple feedback on-off modules, the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, and the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit. The detection circuit also includes a driving decoding module and multiple driving on-off modules, the driving decoding module is used to input the gating drive signal, the first input end of the driving on-off module is electrically connected to the output end of the driving decoding module, and the output end of the driving on-off module is used to be electrically connected to the corresponding cooling device. The method also includes: after determining the position of the faulty device, sending the gating drive signal to the driving decoding module, so that the driving on-off module controls the faulty device to shut down according to the signal of the driving decoding module.

[0018] According to some embodiments of the present application, another aspect of the present application provides an energy storage system, comprising any one of the energy storage converters described above.

[0019] The technical solution provided by the embodiments of the present application has at least the following advantages: the feedback circuit transmits the feedback signal output by the cooling device to the main control circuit in real time. The gating module sequentially disconnects or connects the paths between different cooling devices and the feedback circuit according to the gating control signal. The gating control signal is a signal output by the main control circuit to the gating module via the isolation circuit. The main control circuit determines the location of a faulty device among multiple cooling devices based on the corresponding feedback signal when the gating module disconnects or connects the paths between different cooling devices and the feedback circuit. This allows independent determination of the status of each fan and is compatible with both RD and FG feedback mechanisms, saving costs and improving detection accuracy. This solves the problem in existing fan control and detection circuits that the fan cannot determine the specific faulty fan, making it difficult to locate and repair and replace the fan later. Furthermore, existing fan control and detection circuits can only support fans with RD feedback and cannot control fans with FG feedback. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplified by the figures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise stated, the figures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present application or the technical solutions in the traditional technology, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of an energy storage converter provided in the prior art;

[0022] Figure 2 Schematic diagram of the structure of a first energy storage converter provided in an embodiment of the present application;

[0023] Figure 3 Schematic diagram of the structure of a second energy storage converter provided in an embodiment of the present application;

[0024] Figure 4 Schematic diagram of the structure of a third energy storage converter provided in an embodiment of the present application;

[0025] Figure 5 1 is a schematic structural diagram of a fourth energy storage converter provided in an embodiment of the present application;

[0026] Figure 6 Schematic diagram of a flow chart of a method for detecting a cooling device provided in an embodiment of the present application;

[0027] Figure 7A schematic diagram of a specific circuit of an energy storage converter provided in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of a specific circuit of another energy storage converter provided in an embodiment of the present application;

[0029] Figure 9 This is a schematic diagram of a specific circuit of another energy storage converter provided in an embodiment of the present application.

[0030] The above drawings include the following reference numerals:

[0031] 10. Cooling equipment; 20. Detection circuit; 21. Main control circuit; 22. Isolation circuit; 23. Feedback circuit; 24. Selection module; 241. Feedback decoding module; 242. Feedback on-off module; 25. Driving circuit; 26. Driving decoding module; 27. Driving on-off module. DETAILED DESCRIPTION

[0032] As introduced in the background technology, the fan control and detection circuit in the existing technology cannot determine which specific fan has failed when a fan abnormality is detected. All fans can only be stopped at the same time, which is not convenient for subsequent investigation, positioning, repair and replacement. In addition, the existing fan control and detection circuit can only support RD feedback type fan control and cannot control FG feedback type fans.

[0033] In order to solve the problem that the fan control and detection circuit in the prior art cannot determine which specific fan has failed, which is not convenient for subsequent investigation, positioning, repair and replacement, and the existing fan control and detection circuit can only support RD feedback type fan control and cannot control FG feedback type fans, the embodiments of the present application provide an energy storage inverter and an energy storage system.

[0034] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0035] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may 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 refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0037] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0038] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0040] In the accompanying drawings corresponding to the embodiments of the present application, the thickness and area of ​​the layers are exaggerated for better understanding and ease of description. When describing a component (such as a layer, film, region, or substrate) as being on another component or on the surface of another component, the component may be "directly" located on the surface of the other component, or a third component may be present between the two components. Conversely, when describing a component as being on the surface of another component or as being formed or provided on the surface of a component, it means that there is no third component between the two components. In addition, when describing a component as being "substantially" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0041] In the description of the embodiments of this application, when a component "includes" another component, unless otherwise specified, other components are not excluded, and other components may be further included. In addition, when a component such as a layer, film, region, or plate is referred to as being "on / located on" another component, it can be "directly on" the other component (i.e., located on the surface of the other component with no other components between them) or another component can be present between them. In addition, when a component such as a layer, film, region, or plate is "directly on" another component, or when a component such as a layer, film, region, or plate is located on the surface of another component, it means that no other components are located between them.

[0042] The terms used herein in the description of the various embodiments are intended only to describe the specific embodiments and are not intended to be limiting. As used in the description of the various embodiments and the appended claims, "part" is intended to include the plural form unless the context clearly indicates otherwise. A component includes a layer, film, region, or plate.

[0043] The following detailed description of the various embodiments of the present application is provided in conjunction with the accompanying drawings. However, those skilled in the art will appreciate that numerous technical details are provided in the various embodiments of the present application to facilitate a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and without the various variations and modifications based on the following embodiments.

[0044] As mentioned in the background technology, the FG function is a speed feedback mechanism that reflects the fan speed by generating a PWM pulse signal. The frequency of this signal is proportional to the fan speed and can be used to detect the fan speed. The RD function is an operating status detection mechanism, usually used for alarm signals. When the fan is operating normally, the RD signal outputs a low level; when the fan stops operating or is blocked, the RD signal outputs a high level. The FG function is mainly used to monitor and feedback the fan speed, while the RD function is used to monitor the fan's operating status and provide fault alarms. Both functions are important in the control system of the cooling fan, but they serve different purposes and work in different ways. The FG function enables the system to understand the fan speed and perform corresponding speed regulation or performance management; the RD function is a safety mechanism that ensures that a warning can be issued in time when a fan fails.

[0045] In the prior art, fan systems include an isolation circuit, a drive circuit, and a feedback circuit. Fan systems are typically powered by 12V or 24V, while the main control circuit is a 3.3V / 5V system. To match the circuits at both ends and minimize interference with the main control circuit during fan operation, a digital isolator is typically used to isolate the fan system from the main control circuit. The main control circuit outputs a drive signal via a controller (DO). This signal, after passing through the isolation circuit, is then input into the drive circuit to control the fan's power supply, thereby controlling its start and stop. Feedback signals from the fan's different operating states are processed and converted, then input into the main control circuit controller's (DI) after passing through the isolation circuit. The main control circuit then determines the fan's operating status.

[0046] In energy storage systems using air cooling, multiple fans are typically required to dissipate heat from various components within the device (such as IGBT modules in a PCS). To control and detect the status of each fan, each fan requires a corresponding drive circuit and feedback signal processing circuit. These circuits also occupy corresponding digital isolator channels and the DI / DO pin resources of the main control chip, increasing circuit complexity and cost.

[0047] Figure 1 This is a schematic diagram of the structure of a fan and a detection circuit provided in the prior art. Figure 1 As shown, to reduce costs, a common simplification method is: the controller outputs only one drive signal to drive multiple fans at the same time; the fan feedback signal is first logically processed (adding an AND gate / OR gate, or a diode in parallel, etc. according to the feedback signal level type), and then the logically processed signal is input into the feedback signal processing circuit, thus reducing the feedback signal processing circuit to one.

[0048] For example, in conventional RD feedback type fans, when all fans are working normally, the feedback signals are all low, and the level of the above-mentioned input feedback circuit is also low; when any fan fails and the feedback signal is high, regardless of whether other fans are faulty, the level of the input feedback circuit behind the diode is high, and the main control circuit can now identify the fan failure.

[0049] The above solution has the following problems:

[0050] 1. Performing logic processing at the front end of the feedback circuit simplifies the detection circuit. However, when an abnormal feedback signal is detected, it is impossible to determine which fan is faulty, making it difficult to locate, repair, or replace the fan later.

[0051] 2. The feedback solution is only applicable to fans with RD feedback. For FG feedback, the fan feedback is a PWM signal. When the phases of the PWM signals of different fans are different, they cannot be processed by the logic gate.

[0052] 3. Some systems may have multiple fans to dissipate heat for various components (such as IGBT modules, circuit boards, and magnetic components). Fans are consumable parts with a high failure rate. If a single fan fails, the above circuit can only stop all fans simultaneously. If the location of the faulty fan has little impact on overall system operation, it is necessary to stop that fan individually and maintain system operation for a period of time, which is not possible with the above circuit.

[0053] In this embodiment, an energy storage converter is provided. Figure 2 Schematic diagram of the structure of the energy storage converter according to the embodiment of the present application. Figure 2 As shown, the energy storage converter includes:

[0054] a plurality of cooling devices 10;

[0055] The detection circuit 20 of the cooling device 10 includes a main control circuit 21, an isolation circuit 22, a feedback circuit 23, and a gating module 24 that are electrically connected. The first output terminal of the main control circuit 21 is electrically connected to the first input terminal of the isolation circuit 22, the feedback output terminal of the isolation circuit 22 is electrically connected to the total input terminal of the gating module 24, the sub-input terminals of the gating module 24 are respectively used to be electrically connected to each of the cooling devices 10, the output terminal of the gating module 24 is electrically connected to the input terminal of the feedback circuit 23, the output terminal of the feedback circuit 23 is electrically connected to the second input terminal of the isolation circuit 22, and the second output terminal of the isolation circuit 22 is electrically connected to the main control circuit 21;

[0056] Among them, the feedback circuit 23 is used to transmit the feedback signal output by the cooling device 10 to the main control circuit 21 in real time, and the feedback signal represents the operating status of at least one of the cooling devices 10; the gating module 24 is used to disconnect or connect the paths between different cooling devices 10 and the feedback circuit 23 in sequence according to the gating control signal, and the gating control signal is the signal output by the main control circuit 21 to the gating module 24 through the isolation circuit 22. The main control circuit 21 is at least used to determine the location of the faulty device among the multiple cooling devices 10 according to the corresponding feedback signal when the gating module 24 disconnects or connects the paths between different cooling devices 10 and the feedback circuit 23.

[0057] The cooling device in the above-mentioned embodiments is typically a fan, used to dissipate heat from various components in an energy storage system using an air-cooling solution. Adding a corresponding logic circuit (a gating module) to the fan feedback loop can streamline the circuit structure while ensuring accurate fault and status detection. Specifically, for fans with RD feedback, the specific fan circuit can be determined to be faulty. For fans with FG feedback, the operating status of each fan can also be determined using a corresponding control strategy.

[0058] Compared with traditional solutions, this solution avoids the need to configure a separate feedback circuit and independent chip pin resources for each fan, effectively reducing circuit costs. It also avoids the functional loss of the combined control and detection circuits being unable to accurately determine the specific location of the faulty fan and being unable to independently control the shutdown of the faulty fan.

[0059] like Figure 2 As shown, a gating module 24 is added between the fan original feedback signal and the feedback signal processing circuit. When the controller outputs different control signals DO[1:m], the gating control bus OUT[1:n] outputs different bus level combinations accordingly, thereby realizing independent control of each on-off control circuit.

[0060] For fans using the RD feedback mechanism, all fans output a feedback signal to the main control circuit 21. For example, if the feedback signal output is 0, it proves that all fans are operating normally. If the feedback signal output is 1, it proves that there is an abnormal fan. However, it is impossible to determine which fan is abnormal at this time. Therefore, if maintenance is required, all fans must be shut down and each fan must be checked for faults one by one, which wastes a lot of resources. The gating module 24 can avoid this situation. The main control circuit 21 only needs to provide the gating module 24 with the corresponding control signal DO[1:m], and the gating module can control the turning on or off of different fans.

[0061] For example, there are four fans in total, and all fans are in operation. At this time, the feedback signal output is 1, which proves that there is an abnormal fan. Then the main control circuit 21 gives the corresponding control signals to the selection module 24 to 0111, 1011, 1101, and 1110, respectively, which correspond to turning off the first fan, the second fan, the third fan, and the fourth fan. Since the feedback signal is fed back in real time, there will be a corresponding feedback signal each time a fan is turned off. If the feedback signal output is 0 after turning off the fan, it proves that all fans except the turned-off fan are not faulty. In this way, the currently turned-off fan can be screened out as a faulty fan.

[0062] For another example, there are four fans in total, and all fans are running. At this time, the feedback signal output is 1, which proves that there is an abnormal fan. Then the main control circuit 21 can first control all fans to turn off, and then give the corresponding control signals to the selection module 24 as 1000, 0100, 0010, and 0001, respectively, corresponding to turning on the first fan, the second fan, the third fan, and the fourth fan. Since the feedback signal is fed back in real time, there will be a corresponding feedback signal for each fan that is turned on. If the feedback signal output is 1 after the fan is turned on, it proves that the turned-on fan is a faulty fan.

[0063] The energy storage converter of the present application transmits the feedback signal output by the cooling device to the main control circuit in real time via a feedback circuit. The gating module sequentially disconnects or connects the paths between different cooling devices and the feedback circuit according to the gating control signal. The gating control signal is a signal output by the main control circuit to the gating module via an isolation circuit. The main control circuit determines the location of a faulty device among multiple cooling devices based on the corresponding feedback signal when the gating module disconnects or connects the paths between different cooling devices and the feedback circuit. This allows for independent determination of the status of each fan and is adaptable to both RD and FG feedback mechanisms, saving costs and improving detection accuracy. This solves the problem in the prior art that fan control and detection circuits cannot determine which fan is faulty, making it difficult to locate and repair and replace the fan later. Furthermore, the prior art fan control and detection circuits can only support RD feedback type fan control and cannot control FG feedback type fans.

[0064] In some embodiments, as Figure 3 As shown, the gating module includes: a feedback decoding module 241, the input end of the feedback decoding module 241 is electrically connected to the feedback output end of the isolation circuit 22, and is used to input the gating control signal; a plurality of feedback on-off modules 242, the first input end of the feedback on-off module 242 is used to be electrically connected to the corresponding cooling device 10, the second input end of the feedback on-off module 242 is electrically connected to the output end of the feedback decoding module 241, and the output end of the feedback on-off module 242 is electrically connected to the input end of the feedback circuit 23.

[0065] Add a feedback on-off module between the fan's original feedback signal and the feedback signal processing circuit. This module can be implemented using methods including, but not limited to, MOS, BJT, or a logic AND gate. When the decoded output bus signal is high, the corresponding feedback on-off module is turned on; when the decoded output bus signal is low, the corresponding feedback on-off module is turned off.

[0066] The feedback decoding module can be implemented through logic chips such as decoders. When the controller outputs different control signals DO[1:m], the decoding output bus OUT[1:n] outputs different bus level combinations accordingly, thereby achieving independent control of each feedback on-off module.

[0067] For RD detection, during normal operation, the main control chip sets OUT[1:n] to all highs through the feedback decoding module, and all feedback on-off modules 1 to n are turned on. The detection logic is the same as that of the traditional circuit. When an abnormal feedback signal is detected, the feedback decoding module cyclically disconnects each feedback on-off module. When the detected feedback signal returns to normal, the fan corresponding to the disconnected feedback on-off module is the faulty fan.

[0068] For FG detection, during normal operation, the main control chip uses the feedback decoding module to cycle through each feedback on-off module for a certain period of time. During this time, the feedback signal of the corresponding channel is detected to ensure that the corresponding PWM signal characteristics (such as frequency and duty cycle) can be accurately detected during the on-time. If an abnormal PWM signal is detected, the serial number of the feedback on-off module connected at that time is determined to determine the location of the abnormal fan. The normal PWM signal is 1kHz, with a duty cycle of 50%±10%.

[0069] In summary, by decoding the multi-channel strobe control signals through the feedback decoding module, each feedback on-off module can be independently controlled to turn on or off. This means that the system can independently monitor the feedback signals from each cooling device (fan), accurately identifying which device is faulty or malfunctioning, facilitating fault location and maintenance. Compared to the traditional approach of configuring separate drive and feedback circuits for each cooling device, the combination of the feedback decoding module and the feedback on-off module significantly reduces the DI / DO pin usage of the main control chip and the number of digital isolator channels, thereby reducing circuit complexity and cost. The use of the strobe module allows the signal processing resources of the main control circuit to be shared, allowing multiple fans to be managed using only different control signal combinations. When an abnormal feedback signal is detected, the system can isolate the faulty device by disabling the corresponding feedback on-off module while maintaining normal operation of other devices. This independent control capability not only enables rapid fault response but also allows diagnosis and maintenance of the faulty device without affecting overall system operation, improving system availability and maintenance efficiency.

[0070] In some embodiments, the feedback on-off module includes at least one of a MOS transistor, a BJT, and a logic AND gate. The gate control module can be implemented by a multiplex switch or the like.

[0071] Specifically, using MOS transistors, BJTs, or logic AND gates as the basic building blocks of the feedback on-off module allows for flexible selection of the most appropriate component based on specific application requirements and circuit conditions. MOS transistors and BJTs are commonly used switching elements, suitable for fast-response signal on-off control; logic AND gates can be used for signal logic processing to implement more complex control logic. As switching elements, MOS transistors and BJTs have low on-resistance, which can reduce energy loss in the circuit and improve overall system efficiency. MOS transistors, in particular, are well-suited for situations requiring frequent signal on-off control in high-frequency switching applications due to their fast switching characteristics and low switching losses.

[0072] In some embodiments, as Figure 4 As shown, the detection circuit also includes: a driving circuit 25, the input end of the driving circuit 25 is electrically connected to the driving output end of the isolation circuit 22, and is used to input a driving control signal. The driving control signal is output by the main control circuit 21 to the driving circuit 25 through the isolation circuit 22, and the driving control signal is used to drive each of the cooling devices 10 to operate.

[0073] The main control circuit outputs a driving signal through the controller DO, which is input into the driving circuit after passing through the isolation circuit to control the on and off of the fan power supply, and further control the start and stop of the fan.

[0074] In addition, according to actual needs, a similar circuit can also be configured on the driver side to achieve independent control and shutdown of the faulty fan.

[0075] In some embodiments, as Figure 5 As shown, the detection circuit also includes: a driving decoding module 26, the input end of the driving decoding module 26 is electrically connected to the isolation circuit 22, and is used to input a selection driving signal, the selection driving signal is output by the main control circuit 21 to the driving decoding module 26 through the isolation circuit 22, and the selection driving signal is used to independently drive each of the cooling devices 10 to operate or shut down; a plurality of driving on-off modules 27, the first input end of the driving on-off module 27 is electrically connected to the output end of the driving decoding module 26, the second input end of the driving on-off module 27 is electrically connected to the output end of the driving circuit 25, and the output end of the driving on-off module 27 is used to be electrically connected to the corresponding cooling device 10.

[0076] In actual systems, fans are vulnerable components with a relatively high failure rate, but the probability of simultaneous failure of different fans is very low. When a single fan fails, the above combination of decoding control and on-off control can be applied to the driver end, such as Figure 5As shown in the figure, the controller can output different decoding input control buses DO[1:x] to obtain different drive control bus DRIVE[1:n] combinations, thereby independently controlling the shutdown of the faulty fan.

[0077] The feedback decoding module and the driver decoding module can be implemented using the same decoding circuit. The decoding circuit's primary function is to convert input control signals into a set of output signals for controlling multiple devices or receiving signals from multiple devices. If both the drive and feedback signals are controlled based on the same logic and address encoding mechanism, using the same decoding circuit can avoid the repeated design and manufacture of two separate decoding modules, saving circuit board space, reducing the number of components, and thus lowering costs. When both the drive and feedback circuits rely on the same decoding circuit, the overall control logic of the system becomes simpler and more unified. This means that the main control circuit only needs to manage a single set of control signals to simultaneously control the drive of multiple cooling devices and receive their feedback signals, reducing software programming complexity and the burden on the main control circuit. If the drive and feedback signals follow the same encoding rules, using the same decoding circuit ensures consistent and predictable signal processing, which is very beneficial for debugging and subsequent maintenance. System designers can more easily understand and trace the signal flow, while maintenance personnel can more quickly find solutions when problems arise. Integrating the drive decoding and feedback decoding into a single circuit facilitates design standardization and modularization. This means that the same circuit can be widely used in various scenarios with similar requirements, reducing the workload of redesign and facilitating mass production and quality control.

[0078] In some embodiments, the gating module includes a multiplexing switch.

[0079] Specifically, a multiplexer switch allows multiple input signals to selectively share a single output channel. This design effectively manages and routes feedback signals from multiple cooling devices (such as fans), enabling them to be monitored individually or in groups by the main control circuitry, eliminating the need for independent feedback circuitry for each device and significantly simplifying the system architecture. Using a multiplexer switch significantly reduces the number of input pins (DIs) on the main control chip, as separate input ports are no longer required for each fan. This helps reduce board space, peripheral components, and costs, while also reducing the use of digital isolators, further reducing system complexity and cost. Using a multiplexer switch allows for independent monitoring of each fan. When an abnormal feedback signal is detected, the faulty fan can be immediately located, rather than simply knowing that a fan is faulty but unsure of which one. This facilitates rapid troubleshooting, reduces system downtime, and improves maintenance efficiency.

[0080] Fan drive and feedback circuits typically require power supply modules, level conversion, signal processing, and other circuits, resulting in a relatively complex circuit structure. When there are a large number of fans, multiple corresponding circuits must be configured repeatedly. By adding a decoding control + on / off control combination circuit, or a gating control circuit, to the fan drive control and feedback detection circuits, combined with corresponding control strategies, detection accuracy can be improved (determining which fan is faulty or the operating status of each fan), reducing the number of fan drive and feedback circuits, as well as the channel pin resources occupied by the control chip and digital isolation chip. Furthermore, faulty fans can be independently controlled to shut down.

[0081] In this embodiment, a detection method for a cooling device is also provided. The detection method is applied to a main control circuit in a detection circuit of a cooling device of any one of the energy storage converters. Figure 6 is a flow chart of a method for detecting a cooling device according to an embodiment of the present application. Figure 2 and Figure 6 As shown, the detection method includes the following steps:

[0082] Step S101, determining the feedback signal type of the cooling device 10, wherein the feedback signal type is a first type or a second type, wherein the first type is a digital level signal and the second type is a PWM signal;

[0083] Step S102: If the feedback signal type of the cooling device 10 is the first type and there is a faulty device among the plurality of cooling devices 10, a gating control signal is sent to the gating module 24, and the location of the faulty device among the plurality of cooling devices 10 is determined based on the corresponding feedback signals when the gating module 24 opens or opens the path between different cooling devices 10 and the feedback circuit 23;

[0084] Step S103, when the feedback signal type of the above-mentioned cooling device 10 is the above-mentioned second type, the above-mentioned gating control signal is sent to the gating module 24, and according to the above-mentioned feedback signal corresponding to when the above-mentioned gating module 24 disconnects or connects the path between different above-mentioned cooling devices 10 and the above-mentioned feedback circuit 23, it is determined whether the above-mentioned faulty device exists in the multiple above-mentioned cooling devices 10, and the location of the above-mentioned faulty device is determined if the above-mentioned faulty device exists.

[0085] The cooling device is typically a fan. When the feedback signal type is the first type, the cooling device's feedback type is RD feedback. When the feedback signal type is the second type, the cooling device's feedback type is FG feedback. Depending on the cooling device's feedback type, the gating logic and fault determination method implemented for the cooling device also differ.

[0086] If the cooling device's feedback type is RD feedback, the main control circuit collects the feedback signal in real time. If the feedback signal indicates a fault, the system gates the cooling devices, turning them on or off sequentially to screen for faulty devices. If the cooling device's feedback type is FG feedback, the main control device starts turning the cooling devices on sequentially from the beginning, each time for a preset time to collect the cooling device's PWM signal. The main control device then uses the collected PWM signals from all cooling devices to determine whether a faulty device exists and its location.

[0087] The cooling device detection method of the present application transmits the feedback signal output by the cooling device to the main control circuit in real time via a feedback circuit. The gating module sequentially disconnects or connects the paths between different cooling devices and the feedback circuit according to the gating control signal. The gating control signal is a signal output by the main control circuit to the gating module via an isolation circuit. The main control circuit determines the location of a faulty device among multiple cooling devices based on the corresponding feedback signal when the gating module disconnects or connects the paths between different cooling devices and the feedback circuit. This method can independently determine the status of each fan and is compatible with both RD and FG feedback mechanisms, saving costs and improving detection accuracy. This solves the problem that fan control and detection circuits in the prior art cannot determine which fan is faulty, making it difficult to locate and repair and replace the fan later. In addition, the prior art fan control and detection circuits can only support RD feedback type fan control and cannot control FG feedback type fans.

[0088] In some embodiments, the feedback signal type of the cooling device 10 is the first type. Before sending the gating control signal to the gating module 24 through the isolation circuit 22, the method further includes the following steps:

[0089] Step S201, obtaining a feedback signal from the cooling device 10 in real time;

[0090] Step S202: when the feedback signal is at a low level, determining that the faulty device does not exist in the plurality of cooling devices 10;

[0091] Step S203 : When the feedback signal is at a high level, it is determined that there is a faulty device among the plurality of cooling devices 10 .

[0092] The cooling device is generally a fan. When the feedback signal type is the first type, the feedback type of the cooling device is RD feedback. In this embodiment, a low level is set as a signal indicating normal operation of the device, and a high level is set as a signal indicating a faulty device. It should be noted that the signals in this embodiment are for example purposes only. In some embodiments, signals indicating normal operation of the device and signals indicating a faulty device can also be set according to actual needs.

[0093] Specifically, by monitoring feedback signals in real time, the system can quickly identify cooling device faults, avoiding misjudgments caused by signal delays or misinterpretations. Because it can detect high-level feedback signals in real time, the system can take immediate action, determining the location of the faulty fan through on / off control logic. By accurately identifying the faulty device, maintenance personnel can replace or repair it in a targeted manner, eliminating the need to inspect all devices, saving maintenance costs and downtime. Furthermore, the ability to independently control faulty devices prevents system downtime caused by a single device failure, improving system availability and stability.

[0094] In some embodiments, such as Figure 2 and Figure 3 As shown, the gating module 24 includes a feedback decoding module 241 and multiple feedback on-off modules 242. The input end of the feedback decoding module 241 is used to input the gating control signal. The first input end of the feedback on-off module 242 is used to be electrically connected to the corresponding cooling device 10. The second input end of the feedback on-off module 242 is electrically connected to the output end of the feedback decoding module 241. The output end of the feedback on-off module 242 is electrically connected to the input end of the feedback circuit 23. When the feedback signal type of the cooling device 10 is the first type and there is a faulty device among the multiple cooling devices 10, the gating control signal is sent to the gating module 24, and the location of the faulty device among the multiple cooling devices 10 is determined according to the corresponding feedback signal when the gating module 24 disconnects or connects the path between different cooling devices 10 and the feedback circuit 23, including the following steps:

[0095] Step S10211: When the feedback signal type of the cooling device 10 is the first type and the faulty device exists among the plurality of cooling devices 10, the gating control signal is sent to the feedback decoding module 241, so that the feedback on-off module 242 sequentially disconnects the paths between different cooling devices 10 and the feedback circuit 23 according to the signal of the feedback decoding module 241;

[0096] Step S10212, obtaining the feedback signal corresponding to disconnecting the path between different cooling devices 10 and the feedback circuit 23;

[0097] Step S10213: When the feedback signal is at a low level, determining that the corresponding closed cooling device 10 is the faulty device.

[0098] In the case where the feedback signal type is the first type, the feedback type of the cooling device is RD feedback. For fans with an RD feedback mechanism, all fans output a feedback signal to the main control circuit 21. For example, if the feedback signal output is 0, it proves that all fans are operating normally. If the feedback signal output is 1, it proves that there is an abnormal fan. For example, there are four fans in total, and all fans are in operation. At this time, the feedback signal output is 1, which proves that there is an abnormal fan. Then, the main control circuit 21 sends the corresponding control signals to the selection module 24, which are 0111, 1011, 1101, and 1110, respectively, corresponding to shutting down the first fan, the second fan, the third fan, and the fourth fan. Since the feedback signal is fed back in real time, each time a fan is shut down, there will be a corresponding feedback signal. If the feedback signal output is 0 after shutting down the fan, it proves that all fans except the shut-down fan are normal. In this way, the currently shut-down fan can be screened as a faulty fan.

[0099] Specifically, when the system detects that the feedback signal type is the first type (i.e., RD ​​type, which outputs a high level when faulty) and that at least one faulty device is present, the main control circuit sends a gating control signal to the feedback decoding module 241. The decoding module converts this control signal into a corresponding control instruction for the feedback on-off module 242. This enables the feedback on-off module to sequentially disconnect the path to the feedback circuit 23 based on the decoded signal, thereby checking each cooling device one by one. The system monitors the input signal of the feedback circuit 23 in real time. When the path to the feedback on-off module is disconnected, if the faulty device is connected to that module, its high-level feedback signal will no longer be detected by the feedback circuit, while the low-level signals of other normally functioning devices will continue to be detected. If the feedback signal returns from a high level to a low level after a certain disconnection operation, this indicates that the faulty device is connected to the currently disconnected feedback on-off module 242. Therefore, the system can determine that the corresponding cooling device is the faulty device during that path disconnection operation.

[0100] Through decoding control and dynamic disconnection strategies, the system can precisely identify the specific cooling device that has failed, rather than simply detecting the presence of a faulty device in the system. This precise fault location capability is crucial for subsequent troubleshooting and maintenance. Once the faulty device is located, maintenance personnel can quickly take action, such as replacing or repairing it, without having to inspect all devices. This not only reduces maintenance costs but also minimizes system downtime caused by troubleshooting. The gating module design allows the main control circuit to independently control each cooling device. This means that even after a faulty device is detected, the system can still maintain normal operation of other cooling devices, ensuring that critical components do not overheat and improving overall system efficiency and stability.

[0101] The above embodiment does not need to independently control the shutdown of the faulty fan, so no driver decoding module and multiple driver on-off modules are added, which simplifies the circuit and saves costs.

[0102] If it is necessary to independently control the shutdown of a faulty fan, the above-mentioned driver decoding module and multiple driver on-off modules can be added, as shown in the following embodiment.

[0103] In some embodiments, such as Figure 2 and Figure 5 As shown, the gating module 24 includes a feedback decoding module 241 and a plurality of feedback on-off modules 242. The input end of the feedback decoding module 241 is used to input the gating control signal. The first input end of the feedback on-off module 242 is used to be electrically connected to the corresponding cooling device 10. The second input end of the feedback on-off module 242 is electrically connected to the output end of the feedback decoding module 241. The output end of the feedback on-off module 242 is electrically connected to the input end of the feedback circuit 23. The detection circuit 20 also includes a driving decoding module 26 and a plurality of driving on-off modules 27. The driving decoding module 26 is used to input the gating control signal. The driving signal, the first input end of the driving on-off module 27 is electrically connected to the output end of the driving decoding module 26, and the output end of the driving on-off module 27 is used to be electrically connected to the corresponding cooling device 10. When the feedback signal type of the cooling device 10 is the first type and there is a faulty device among the multiple cooling devices 10, the gating control signal is sent to the gating module 24, and the position of the faulty device among the multiple cooling devices 10 is determined according to the corresponding feedback signal when the gating module 24 disconnects or connects the path between different cooling devices 10 and the feedback circuit 23, including the following steps:

[0104] Step S10221: When the feedback signal type of the cooling device 10 is the first type and the faulty device exists among the plurality of cooling devices 10 , control all the cooling devices 10 to shut down;

[0105] Step S10222: Send the strobe control signal to the feedback decoding module 241 and send the strobe drive signal to the drive decoding module 26, so that the feedback on-off module 242 sequentially conducts the paths between different cooling devices 10 and the feedback circuit 23 according to the signal of the feedback decoding module 241, and the drive on-off module 27 sequentially drives the corresponding cooling devices 10 to operate according to the signal of the drive decoding module 26;

[0106] Step S10223, obtaining the feedback signals corresponding to the operation of different cooling devices 10;

[0107] Step S10224: When the feedback signal is at a high level, determine that the corresponding cooling device 10 is the faulty device.

[0108] Among them, in order to determine the faulty cooling device, all cooling devices can be turned on first, and then the feedback path of each device can be closed in turn to screen out the faulty device, or all cooling devices can be turned on first, and then each device can be directly closed in turn to screen out the faulty device, or all devices can be closed first, and then opened in turn to screen out the faulty device.

[0109] That is, when the system detects a faulty device in an RD-type feedback signal, it first shuts down all cooling devices 10. This ensures that only the selected device is operating during the fault detection process, preventing signal interference from other devices. The main control circuit simultaneously sends a gating control signal to the feedback decoding module 241 and a gating drive signal to the drive decoding module 26. These two decoding modules control the conduction and disconnection of the feedback on / off module 242 and the drive on / off module 27, respectively, based on the received control signals. The feedback decoding module 241 sequentially connects different cooling devices to the feedback circuit 23, while the drive decoding module 26 synchronously drives the corresponding cooling devices. The system dynamically monitors the feedback signals received by the feedback circuit 23 when different cooling devices are operating. In this way, the system can check the operating status of each device individually without being affected by other devices. If the system detects a high level feedback signal during a given check, this indicates that the cooling device being selected and driven is a faulty device. This is because when a cooling device is operating normally, the RD feedback signal should be low, and any change to a high level indicates a device failure.

[0110] Through this gating and coordinated control mechanism, the system can accurately identify and locate faulty cooling devices without blindly checking all devices, significantly improving the efficiency and accuracy of troubleshooting. This approach not only provides fault detection but also supports independent control of individual cooling devices. This means the system can isolate or shut down faulty devices while keeping other devices operating normally, which is crucial for maintaining overall system stability and cooling efficiency. Through the collaborative operation of the drive decoding and feedback decoding modules, the system can dynamically adjust cooling strategies. For example, upon detecting a faulty device, it can quickly adjust the operating status of other devices to ensure the cooling needs of critical components, enhancing the system's intelligent response and adaptability. Once the faulty device is located, maintenance personnel can repair or replace it without shutting down the entire system for inspection. This reduces maintenance costs, minimizes system downtime, and improves equipment availability and operational efficiency.

[0111] In some embodiments, such as Figure 2 and Figure 5 As shown, the gating module includes a feedback decoding module 241 and a plurality of feedback on-off modules 242. The input end of the feedback decoding module 241 is used to input the gating control signal. The first input end of the feedback on-off module 242 is used to be electrically connected to the corresponding cooling device 10. The second input end of the feedback on-off module 242 is electrically connected to the output end of the feedback decoding module 241. The output end of the feedback on-off module 242 is electrically connected to the input end of the feedback circuit 23. The detection circuit 20 also includes a driving decoding module 26 and a plurality of driving on-off modules 27. The driving decoding module 26 is used to input the gating driving signal. The driving decoding module 26 is electrically connected to the first input terminal of the driving on-off module 27, and the output terminal of the driving on-off module 27 is used to be electrically connected to the corresponding cooling device 10. When the feedback signal type of the cooling device 10 is the first type and the faulty device exists in the plurality of cooling devices 10, the gating control signal is sent to the gating module 24, and the position of the faulty device in the plurality of cooling devices 10 is determined according to the corresponding feedback signal when the gating module 24 disconnects or connects the path between different cooling devices 10 and the feedback circuit 23, including the following steps:

[0112] Step S10231: When the feedback signal type of the cooling device 10 is the first type and the faulty device exists among the plurality of cooling devices 10, the gating control signal is sent to the feedback decoding module 241 and the gating drive signal is sent to the drive decoding module 26, so that the feedback on-off module 242 sequentially disconnects the paths between different cooling devices 10 and the feedback circuit 23 according to the signal of the feedback decoding module 241 and the drive on-off module 27 sequentially controls the corresponding cooling devices 10 to be turned off according to the signal of the drive decoding module 26;

[0113] Step S10232, obtaining the feedback signals corresponding to when different cooling devices 10 are turned off;

[0114] Step S10233: When the feedback signal is at a low level, the cooling device 10 that is shut down is determined to be the faulty device.

[0115] Specifically, when the system detects a faulty device, the main control circuit simultaneously sends a gate control signal to the feedback decoding module 241 and a gate drive signal to the drive decoding module 26. Based on the received control signals, the feedback decoding module and the drive decoding module control the on / off states of the feedback on / off module 242 and the drive on / off module 27, respectively. Based on the encoding of the gate control signal, the feedback decoding module 241 sequentially disconnects the paths between different cooling devices and the feedback circuit 23. Simultaneously, the drive decoding module 26 controls the corresponding drive on / off modules 27 to shut down the relevant cooling devices in turn. This collaborative operation ensures the synchronization of fault detection and device control, enabling the detection and shutdown of each device individually until the faulty device is located. The system continuously monitors the feedback signal received by the feedback circuit 23. When a cooling device is disconnected or shut down, if it is faulty, the system will observe the feedback signal change from an abnormally high level back to a normal low level. If the feedback signal changes from a high level to a low level after disconnecting or shutting down a cooling device, it can be determined that the cooling device is faulty. Because under normal circumstances, the RD feedback signal is at a low level and will only rise to a high level when the device fails.

[0116] Through the collaborative operation of the feedback decoding module, feedback on-off module, drive decoding module, and drive on-off module, the system can accurately locate faulty cooling equipment, avoiding blind inspection of the entire system and improving the efficiency and accuracy of troubleshooting. After detecting a faulty device, the system can shut down only that device while maintaining normal operation of other cooling equipment. This avoids the impact of system-wide shutdown on cooling efficiency and ensures that the system maintains high operational stability even when some equipment fails. The precise location and independent control shutdown of the faulty device means that maintenance personnel can directly address the faulty device without having to troubleshoot and shut down the entire system, thereby reducing maintenance costs and downtime.

[0117] Figure 7 is a schematic diagram of a specific circuit of an energy storage converter provided in an embodiment of the present application, such as Figure 7 As shown, the cooling device is a fan. In the case of RD feedback type, it is necessary to independently control the shutdown of the faulty fan, and the feedback decoding module and the drive decoding module use the same decoding circuit (i.e. Figure 7 This method optimizes circuit design by sharing decoding modules and collaborative control mechanisms, reducing circuit board space and component costs while also improving the utilization of main control circuit resources (such as digital input and output pins). The truth table of the decoding circuit is shown in Table 1:

[0118] Table 1. Truth table of decoding circuit

[0119]

[0120] The truth table of the decoding circuit is shown in Table 1. Figure 7 As shown in Table 1, during normal operation, the main control circuit DO_DRV outputs a high level, DO_EN outputs a low level (turns off the decoding circuit enable signal), the decoding circuit bus outputs OUT[8..1] are all high levels, and the drive on / off and feedback on / off are fully open.

[0121] If the fan is operating normally, the input level to the feedback circuit is low. When the fan is operating abnormally, the input level to the feedback circuit becomes high. At this time, the main control circuit maintains the DO_DRV signal at a high level and sets the DO_EN signal high to enable the decoding circuit. DO[3..1] controls the decoding circuit output, sequentially shutting down the corresponding drive on / off and feedback on / off modules. For example, when OUT[3..1] outputs 010 (disconnecting the drive on / off and feedback on / off modules corresponding to Fan 3), the feedback signal returns to normal, indicating that the faulty fan is Fan 3. At this time, if the system needs to continue operating, maintain the above output state to shut down the Fan 3 drive. If the system needs to be shut down for maintenance and all fans need to be shut down, set the DO_DRV signal low.

[0122] Based on the above scheme, the feedback on-off control and the drive on-off control can also be made independent of each other, and a decoding circuit can be used on the drive side and the feedback side respectively, such as Figure 8 As shown, Figure 8 The driving decoding circuit in is the driving decoding module mentioned above, and the feedback decoding circuit is the feedback decoding module mentioned above.

[0123] In some embodiments, such as Figure 2 and Figure 3 As shown, the gating module includes a feedback decoding module 241 and multiple feedback on-off modules 242. The input end of the feedback decoding module 241 is used to input the gating control signal. The first input end of the feedback on-off module 242 is used to be electrically connected to the corresponding cooling device 10. The second input end of the feedback on-off module 242 is electrically connected to the output end of the feedback decoding module 241. The output end of the feedback on-off module 242 is electrically connected to the input end of the feedback circuit 23. When the feedback signal type of the cooling device 10 is the second type, the gating control signal is sent to the gating module 24. When the gating module 24 opens or opens the path between different cooling devices 10 and the feedback circuit 23, the corresponding feedback signal is determined to determine whether there is a faulty device in the multiple cooling devices 10 and the location of the faulty device if there is a faulty device. The method includes the following steps:

[0124] Step S1031: Send the gating control signal to the feedback decoding module 241, so that the feedback on-off module 242 sequentially switches on the paths between different cooling devices 10 and the feedback circuit 23 according to the signal of the feedback decoding module 241, and the switching on time is a preset time;

[0125] Step S1032, obtaining the feedback signal corresponding to when different paths between the cooling device 10 and the feedback circuit 23 are connected;

[0126] Step S1033: When the frequency and duty cycle of the feedback signal are both within corresponding preset ranges, determining that the corresponding cooling device 10 has no fault;

[0127] Step S1034 : When at least one of the frequency and the duty cycle of the feedback signal is not within the corresponding preset range, determining that the corresponding cooling device 10 is the faulty device.

[0128] Among them, the frequency of the normal feedback signal is about 1kHz, and the normal preset range of the duty cycle is 50%±10%.

[0129] Specifically, the main control circuit sends a gating control signal to the feedback decoding module 241. Based on the signal, the feedback decoding module sends control instructions to different feedback on-off modules 242, causing them to turn on in sequence within a preset time, establishing a signal path from the cooling device to the feedback circuit 23. This preset time must be long enough to capture a complete PWM cycle to ensure accurate measurement of the signal's frequency and duty cycle. The feedback circuit 23 continuously monitors the PWM signals transmitted through each feedback on-off module. Because the cooling device's signal has specific frequency and duty cycle characteristics during normal operation, by monitoring these characteristics, the system can determine the device's operating status. The system compares the received feedback signal with a preset signal characteristic range. If the signal's frequency and duty cycle both fall within the preset range, the cooling device is operating normally. Conversely, if the signal's frequency or duty cycle deviates from the preset range, the system determines that the cooling device is faulty. The preset range is typically set based on the cooling device's specifications and operating conditions.

[0130] By dynamically monitoring the FG feedback signals from different cooling units, the system can precisely identify the unit with the abnormal PWM signal, thereby locating the faulty unit. This avoids blindly checking all units and improves the efficiency and accuracy of fault detection. Because the frequency and duty cycle of the PWM signal directly reflect the operating status of the cooling unit, this signal-based detection method significantly reduces the probability of false alarms compared to simple level detection (such as RD-type signals), especially in complex and changing operating environments. FG-type signals contain rich device status information, allowing the system to make more intelligent decisions when a fault occurs, such as dynamically adjusting the operating speed of other units to compensate for the faulty unit's effects, thereby improving overall system stability and reliability. The precise location of the faulty unit means maintenance personnel can repair or replace the faulty unit directly without inspecting the entire system. This not only reduces maintenance costs but also significantly reduces system downtime caused by troubleshooting.

[0131] In some embodiments, such as Figure 5 As shown, the gating module includes a feedback decoding module 241 and multiple feedback on-off modules 242. The input end of the feedback decoding module 241 is used to input the gating control signal. The first input end of the feedback on-off module 242 is used to be electrically connected to the corresponding cooling device 10. The second input end of the feedback on-off module 242 is electrically connected to the output end of the feedback decoding module 241. The output end of the feedback on-off module 242 is electrically connected to the input end of the feedback circuit 23. The detection circuit 20 also includes a driving decoding module 26 and multiple driving on-off modules 27. The driving decoding module 26 is used to input the gating drive signal. The first input end of the driving on-off module 27 is electrically connected to the output end of the driving decoding module 26. The output end of the driving on-off module 27 is used to be electrically connected to the corresponding cooling device 10. The method further includes: after determining the location of the faulty device, sending the gating drive signal to the driving decoding module 26, so that the driving on-off module 27 controls the faulty device to be turned off according to the signal of the driving decoding module 26.

[0132] Specifically, by configuring the feedback decoding module 241 and multiple feedback on-off modules 242, the system can individually open the paths between different cooling devices and the feedback circuit 23 based on a gating control signal, while simultaneously capturing and analyzing the device's feedback signals. This mechanism allows the system to check the status of each cooling device without affecting the operation of other devices. Once an abnormal feedback signal is detected (whether a high level RD-type signal or a frequency / duty cycle abnormality FG-type signal), the system can determine which cooling device is the source of the fault through the collaboration of the feedback decoding module 241 and the feedback on-off modules 242. This is achieved by sending a gating control signal to the feedback decoding module 241, which in turn controls the feedback on-off modules 242 to examine the feedback signals of each device one by one. After the faulty device is located, the system uses the drive decoding module 26 and the drive on-off modules 27 to independently control the shutdown of the faulty device. This is achieved by sending a gating drive signal to the drive decoding module 26, which controls the on / off switching of the drive on-off modules 27 based on the signal, thereby shutting down only the located faulty device.

[0133] This approach allows the system to precisely locate the faulty device among numerous cooling devices, avoiding the need for system-wide shutdown and reducing overall maintenance costs. At the same time, by immediately shutting down the faulty device, potential safety hazards and further deterioration of system performance are prevented. By precisely controlling the faulty device, the system is able to maintain the normal operation of the remaining cooling devices, thereby minimizing the faulty device's impact on the overall system cooling performance, ensuring the normal operating temperatures of critical components, and improving the overall stability and efficiency of the system. The rapid location and independently controlled shutdown of the faulty device greatly simplifies the maintenance process, allowing maintenance personnel to take action directly on the faulty device without the need for extensive system investigations, saving significant time and resources.

[0134] Figure 9 A schematic diagram of a specific circuit of another energy storage converter provided in an embodiment of the present application is shown in FIG. Figure 9 As shown, the cooling device is a fan. In the case of feedback type FG, it is necessary to independently control the shutdown of the faulty fan, and the feedback decoding module and the feedback on-off module use a gating module (i.e. Figure 9 The feedback gating circuit in the gate module is implemented. The truth table of the gating module is shown in Table 2:

[0135] Table 2. Truth table of the strobe module

[0136]

[0137] The truth table of the strobe module is shown in Table 2. Figure 9As shown in Table 2, during normal operation, the main control circuit DO_DRV outputs a high level or outputs a PWM speed control signal as needed, DO_EN outputs a low level (turns off the drive decoding circuit enable signal), the drive decoding circuit bus output OUT[8..1] are all high levels, the drive is fully turned on and off, and the speed is adjusted according to the main control circuit DO_DRV signal characteristics.

[0138] On the feedback side, the main control circuit DO[6..4] performs a cyclic output, causing the feedback selection circuit SEL[3..1] to switch on the channel in a cyclic manner according to the above truth table, and detect the feedback signal characteristics (frequency, duty cycle, etc.) of the fan corresponding to each channel in turn.

[0139] If a fan, such as Fan 5, experiences an abnormality, and DO[6..4] outputs are 100, the feedback signal DI_FEED detects the abnormality and determines the location of the faulty fan. To maintain system operation, the main control circuit maintains its DO_DRV output, switches DO_EN high to enable the driver decoding circuit, and simultaneously adjusts DO[3..1] outputs to 100 to shut down Fan 5. To shut down the system for maintenance and disable all fans, set DO_DRV low.

[0140] Similarly, if there is no need to independently control the shutdown of a faulty fan, the above-mentioned driver decoding module and driver on-off module can be removed, which can simplify the circuit and reduce costs.

[0141] The above embodiments all take 8 fans as an example. Referring to the above technical solution description, if the number of fans is increased or decreased, the corresponding decoding circuit and gating circuit configurations can be optimized and adjusted.

[0142] Furthermore, the drive-side and feedback-side circuit modules can be selectively configured according to actual needs, achieving different requirements through different combinations of decoding circuits, gating circuits, drive on / off, and feedback on / off. Furthermore, each circuit module can be implemented in a variety of ways. For example, the decoding circuit can use a codec / demultiplexer, the gating circuit can use an analog multiplexer, and on / off control can be implemented through a logic AND gate / logic OR gate / MOS switch.

[0143] This embodiment relates to an energy storage system, including any one of the above-mentioned energy storage converters.

[0144] The energy storage system can independently determine the status of each fan in the energy storage converter and is adaptable to both RD and FG feedback mechanisms, saving costs and improving detection accuracy. It solves the problem in the prior art that the fan control and detection circuit cannot determine which specific fan has failed, making it inconvenient for subsequent troubleshooting, positioning, repair and replacement. In addition, the existing fan control and detection circuit can only support RD feedback type fan control and cannot control FG feedback type fans.

[0145] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0146] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0147] 1. The energy storage converter of the present application transmits the feedback signal output by the cooling device to the main control circuit in real time via the feedback circuit. The gating module sequentially disconnects or connects the paths between different cooling devices and the feedback circuit according to the gating control signal. The gating control signal is a signal output by the main control circuit to the gating module via the isolation circuit. The main control circuit determines the location of a faulty device among multiple cooling devices based on the corresponding feedback signal when the gating module disconnects or connects the paths between different cooling devices and the feedback circuit. This allows the status of each fan to be independently determined and is adaptable to both RD and FG feedback mechanisms, saving costs and improving detection accuracy. This solves the problem that fan control and detection circuits in the prior art cannot determine which specific fan has failed, making it difficult to locate and repair and replace the fan later. In addition, the existing fan control and detection circuits can only support RD feedback type fan control and cannot control FG feedback type fans.

[0148] 2. The cooling device detection method of the present application transmits the feedback signal output by the cooling device to the main control circuit in real time via a feedback circuit. The gating module sequentially disconnects or connects the paths between different cooling devices and the feedback circuit according to the gating control signal. The gating control signal is a signal output by the main control circuit to the gating module via an isolation circuit. The main control circuit determines the location of a faulty device among multiple cooling devices based on the corresponding feedback signal when the gating module disconnects or connects the paths between different cooling devices and the feedback circuit. This method can independently determine the status of each fan and is compatible with both RD and FG feedback mechanisms, saving costs and improving detection accuracy. This solves the problem that fan control and detection circuits in the prior art cannot determine which fan is faulty, making it difficult to locate and repair and replace the fan later. In addition, the prior art fan control and detection circuits can only support fans with RD feedback and cannot control fans with FG feedback.

[0149] Those skilled in the art will appreciate that the above-described embodiments are specific examples for implementing the present application, and that in actual applications, various changes in form and detail may be made thereto without departing from the spirit and scope of the present application. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. An energy storage converter, characterized in that: include: Multiple cooling devices; a detection circuit for the cooling device, the detection circuit comprising an electrically connected main control circuit, an isolation circuit, a feedback circuit, and a gating module, wherein a first output terminal of the main control circuit is electrically connected to a first input terminal of the isolation circuit, a feedback output terminal of the isolation circuit is electrically connected to a total input terminal of the gating module, sub-input terminals of the gating module are respectively used to be electrically connected to each of the cooling devices, an output terminal of the gating module is electrically connected to an input terminal of the feedback circuit, an output terminal of the feedback circuit is electrically connected to a second input terminal of the isolation circuit, and a second output terminal of the isolation circuit is electrically connected to the main control circuit; The feedback circuit is used to transmit the feedback signal output by the cooling device to the main control circuit in real time, and the feedback signal represents the operating status of at least one of the cooling devices; the gating module is used to sequentially disconnect or connect the paths between different cooling devices and the feedback circuit according to the gating control signal, and the gating control signal is a signal output by the main control circuit to the gating module through the isolation circuit. The main control circuit is at least used to determine the location of the faulty device among the multiple cooling devices according to the corresponding feedback signal when the gating module disconnects or connects the paths between different cooling devices and the feedback circuit; The detection circuit further includes: A drive circuit, wherein an input end of the drive circuit is electrically connected to a drive output end of the isolation circuit and is used to input a drive control signal, wherein the drive control signal is output by the main control circuit to the drive circuit through the isolation circuit, and the drive control signal is used to drive each of the cooling devices to operate; A driving decoding module, wherein the input end of the driving decoding module is electrically connected to the isolation circuit and is used to input a strobe driving signal, wherein the strobe driving signal is output by the main control circuit to the driving decoding module through the isolation circuit, and the strobe driving signal is used to independently drive each of the cooling devices to operate or shut down; Multiple driving on-off modules, the first input end of the driving on-off module is electrically connected to the output end of the driving decoding module, the second input end of the driving on-off module is electrically connected to the output end of the driving circuit, and the output end of the driving on-off module is used to be electrically connected to the corresponding cooling device.

2. The energy storage converter according to claim 1, characterized in that: The gating module comprises: a feedback decoding module, wherein an input terminal of the feedback decoding module is electrically connected to a feedback output terminal of the isolation circuit and is used for inputting the gating control signal; Multiple feedback on-off modules, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, and the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit.

3. The energy storage converter according to claim 2, characterized in that: The feedback on-off module includes at least one of a MOS tube, a BJT and a logic AND gate.

4. The energy storage converter according to claim 1, characterized in that: The gating module includes a multiplexing switch.

5. A method for detecting a cooling device, characterized in that: The detection method is applied to the main control circuit in the detection circuit of the cooling device of the energy storage converter according to any one of claims 1 to 4, and the detection method includes: Determining a feedback signal type of the cooling device, where the feedback signal type is a first type or a second type, the first type being a digital level signal, and the second type being a PWM signal; When the feedback signal type of the cooling device is the first type and the faulty device exists among the plurality of cooling devices, a gating control signal is sent to the gating module, and a location of the faulty device among the plurality of cooling devices is determined based on the corresponding feedback signals when the gating module disconnects or connects the paths between different cooling devices and the feedback circuit; When the feedback signal type of the cooling device is the second type, the gating control signal is sent to the gating module, and based on the corresponding feedback signal when the gating module disconnects or connects the path between different cooling devices and the feedback circuit, it is determined whether the faulty device exists in the multiple cooling devices and the location of the faulty device is determined if the faulty device exists.

6. The method for detecting cooling equipment according to claim 5, characterized in that: The feedback signal type of the cooling device is the first type. Before the gating control signal is sent to the gating module through the isolation circuit, the method further includes: Obtaining a feedback signal from the cooling device in real time; When the feedback signal is at a low level, determining that the faulty device does not exist in the plurality of cooling devices; When the feedback signal is at a high level, it is determined that the faulty device exists in the plurality of cooling devices.

7. The cooling equipment detection method according to claim 5, characterized in that: The gating module includes a feedback decoding module and multiple feedback on-off modules, the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, and the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit. When the feedback signal type of the cooling device is the first type and the faulty device exists in the multiple cooling devices, the gating control signal is sent to the gating module, and the location of the faulty device in the multiple cooling devices is determined according to the corresponding feedback signal when the gating module disconnects or connects the path between different cooling devices and the feedback circuit, including: When the feedback signal type of the cooling device is the first type and the faulty device exists among the plurality of cooling devices, the gating control signal is sent to the feedback decoding module, so that the feedback on-off module sequentially disconnects the paths between different cooling devices and the feedback circuit according to the signal of the feedback decoding module; Obtaining the feedback signal corresponding to when the paths between different cooling devices and the feedback circuit are disconnected; When the feedback signal is at a low level, the corresponding closed cooling device is determined to be the faulty device.

8. The method for detecting cooling equipment according to claim 5, characterized in that: The gating module includes a feedback decoding module and multiple feedback on-off modules, wherein the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, and the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit. The detection circuit also includes a driving decoding module and multiple driving on-off modules, wherein the driving decoding module is used to input the gating driving signal, the first input end of the driving on-off module is electrically connected to the output end of the driving decoding module, and the output end of the driving on-off module is used to be electrically connected to the corresponding cooling device. When the feedback signal type of the cooling device is the first type and the faulty device exists among the multiple cooling devices, the gating control signal is sent to the gating module, and the location of the faulty device among the multiple cooling devices is determined based on the corresponding feedback signal when the gating module disconnects or connects the path between different cooling devices and the feedback circuit, including: When the feedback signal type of the cooling device is the first type and the faulty device exists among the plurality of cooling devices, controlling all the cooling devices to shut down; Sending the strobe control signal to the feedback decoding module and sending the strobe drive signal to the drive decoding module, so that the feedback on-off module sequentially conducts the paths between different cooling devices and the feedback circuit according to the signal of the feedback decoding module and the drive on-off module sequentially drives the corresponding cooling devices to operate according to the signal of the drive decoding module; Obtaining the feedback signals corresponding to the operation of different cooling devices; When the feedback signal is at a high level, the corresponding cooling device is determined to be the faulty device.

9. The cooling equipment detection method according to claim 5, characterized in that: The gating module includes a feedback decoding module and multiple feedback on-off modules, wherein the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, and the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit. The detection circuit also includes a driving decoding module and multiple driving on-off modules, wherein the driving decoding module is used to input the gating driving signal, the first input end of the driving on-off module is electrically connected to the output end of the driving decoding module, and the output end of the driving on-off module is used to be electrically connected to the corresponding cooling device. When the feedback signal type of the cooling device is the first type and the faulty device exists among the multiple cooling devices, the gating control signal is sent to the gating module, and the location of the faulty device among the multiple cooling devices is determined based on the corresponding feedback signal when the gating module disconnects or connects the path between different cooling devices and the feedback circuit, including: When the feedback signal type of the cooling device is the first type and the faulty device exists among the plurality of cooling devices, the gating control signal is sent to the feedback decoding module and the gating drive signal is sent to the drive decoding module, so that the feedback on-off module sequentially disconnects the paths between different cooling devices and the feedback circuit according to the signal of the feedback decoding module and the drive on-off module sequentially controls the corresponding cooling devices to be turned off according to the signal of the drive decoding module; Obtaining the feedback signals corresponding to when different cooling devices are turned off; When the feedback signal is at a low level, the corresponding closed cooling device is determined to be the faulty device.

10. The cooling equipment detection method according to claim 5, characterized in that: The gating module includes a feedback decoding module and multiple feedback on-off modules, the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, and the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit. When the feedback signal type of the cooling device is the second type, the gating control signal is sent to the gating module, and the corresponding feedback signal when the gating module disconnects or connects the path between different cooling devices and the feedback circuit is determined to determine whether the faulty device exists in the multiple cooling devices and the location of the faulty device if the faulty device exists, including: Sending the gating control signal to the feedback decoding module, so that the feedback on-off module sequentially switches on the paths between different cooling devices and the feedback circuit according to the signal of the feedback decoding module, and the switching on time is a preset time; Obtaining the feedback signal corresponding to when the paths between different cooling devices and the feedback circuit are connected; When the frequency and duty cycle of the feedback signal are both within corresponding preset ranges, determining that the corresponding cooling device has no fault; When at least one of the frequency and the duty cycle of the feedback signal is not within a corresponding preset range, the corresponding cooling device is determined to be the faulty device.

11. The cooling device detection method according to claim 5, characterized in that: The gating module includes a feedback decoding module and multiple feedback on-off modules, the input end of the feedback decoding module is used to input the gating control signal, the first input end of the feedback on-off module is used to be electrically connected to the corresponding cooling device, the second input end of the feedback on-off module is electrically connected to the output end of the feedback decoding module, and the output end of the feedback on-off module is electrically connected to the input end of the feedback circuit. The detection circuit also includes a driving decoding module and multiple driving on-off modules, the driving decoding module is used to input the gating driving signal, the first input end of the driving on-off module is electrically connected to the output end of the driving decoding module, and the output end of the driving on-off module is used to be electrically connected to the corresponding cooling device. The method also includes: After the location of the faulty device is determined, a gate drive signal is sent to the drive decoding module, so that the drive on-off module controls the faulty device to be turned off according to the signal of the drive decoding module.

12. An energy storage system, characterized in that: The energy storage converter comprises the energy storage converter according to any one of claims 1 to 4.

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