Energy storage converter and energy storage system

Abstract

The embodiment of the invention relates to the field of energy storage, and provides an energy storage converter and an energy storage system. The energy storage converter comprises a plurality of cooling devices and a detection circuit, the detection circuit comprises a main control circuit, an isolation circuit, a feedback circuit and a gating module which are electrically connected, the feedback circuit transmits feedback signals output by the cooling devices to the main control circuit in real time, and the feedback signals represent the operation states of the cooling devices; the gating module is used for sequentially disconnecting or connecting channels between different cooling devices and the feedback circuit according to a gating control signal, and the gating control signal is a signal output to the gating module by the main control circuit through the isolation circuit; and the main control circuit is at least used for determining the position of a fault device in the plurality of cooling devices according to a corresponding feedback signal when the gating module disconnects or connects the channels between the different cooling devices and the feedback circuit. The energy storage converter can independently judge the state of each fan, is suitable for RD and FG feedback mechanisms, saves the cost, and improves the detection accuracy.

Description

Technical Field

[0001] This application relates to the field of energy storage, and particularly to a power conversion system for energy storage and an energy storage system. Background Art

[0002] Currently, there are generally two common types of fan feedback signals, namely FG feedback and RD feedback. FG (Frequency Generator) feedback is a rotational speed feedback mechanism that reflects the rotational speed of the fan by generating PWM pulse signals. RD (Rotation Detection) feedback is an operating state detection mechanism, usually used for alarm signals.

[0003] In an energy storage system using an air-cooling solution, multiple fans are usually required to dissipate heat from each component in the device (such as dissipating heat from the IGBT module in the PCS). However, in the existing fan control and detection circuit, when a fan anomaly is detected, it is impossible to determine which specific fan has failed. It can only stop all fans simultaneously, which is not convenient for later troubleshooting, positioning, maintenance, and replacement. Moreover, the existing fan control and detection circuit can only support fan control of the RD feedback type and cannot control fans of the FG feedback type. Summary of the Invention

[0004] Embodiments of this application provide a power conversion system for energy storage and an energy storage system, which can at least independently determine the status of each fan, and are adapted to both RD and FG feedback mechanisms, 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, including: a plurality of cooling devices; a detection circuit of the cooling device, the detection circuit includes a main control circuit, an isolation circuit, a feedback circuit and a gating module that are electrically connected. The first output end of the main control circuit is electrically connected to the first input end of the isolation circuit, the feedback output end of the isolation circuit is electrically connected to the total input end of the gating module, the sub-input ends of the gating module are respectively used to be electrically connected to each cooling device, the output end of the gating module is electrically connected to the input end of the feedback circuit, the output end of the feedback circuit is electrically connected to the second input end of the isolation circuit, and the second output end of the isolation circuit 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 characterizes the operating state of at least one cooling device; the gating module is used to sequentially disconnect or conduct the path 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 position of the faulty device among the plurality of cooling devices according to the feedback signal corresponding to when the gating module disconnects or conducts the path 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 for inputting 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 further includes: a driving circuit, the input end of the driving circuit is electrically connected to the driving output end of the isolation circuit for inputting a driving control signal, and the driving control signal is output by the main control circuit to the driving circuit through the isolation circuit. The driving control signal is used to drive each cooling device to operate.

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

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

[0011] According to some embodiments of the present application, on the other hand, an embodiment of the present application provides a detection method for a cooling device. 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. The detection method includes: determining a feedback signal type of the cooling device, the feedback signal type being 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 plurality of cooling devices, sending a gating control signal to the gating module, and determining the position of the faulty device among the plurality of cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the paths between different 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 plurality of cooling devices and determining the position of the faulty device when there is a faulty device according to the corresponding feedback signal when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit.

[0012] In some embodiments, the feedback signal type of the cooling device is the first type. Before sending the gating control signal to the gating module through the isolation circuit, the method further includes: acquiring the feedback signal of the cooling device in real time; when the feedback signal is a low level, determining that there is no faulty device among the plurality of cooling devices; when the feedback signal is a high level, determining that there is a faulty device among the plurality of 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 for inputting the gating control signal. The first input end of the feedback on-off module is used for electrically connecting 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. When the feedback signal type of the cooling device is the first type and there is a faulty device among the plurality of cooling devices, the gating control signal is sent to the gating module, and the position of the faulty device among the plurality of cooling devices is determined according to the corresponding feedback signal when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit, including: when the feedback signal type of the cooling device is the first type and there is a faulty device among the plurality of cooling devices, sending the gating 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 corresponding feedback signal when disconnecting the paths between different cooling devices and the feedback circuit; and when the feedback signal is at a low level, determining the cooling device corresponding to the closed state as 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 for inputting the gating control signal. The first input end of the feedback on-off module is 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 further includes a driving decoding module and a plurality of driving on-off modules. The driving decoding module is used for inputting a 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 for being electrically connected to the corresponding cooling device. When the feedback signal type of the cooling device is the first type and there is a faulty device among the plurality of cooling devices, sending the gating control signal to the gating module and determining the position of the faulty device among the plurality of cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit includes: when the feedback signal type of the cooling device is the first type and there is a faulty device among the plurality of 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 driving signal to the driving 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 driving on-off module sequentially drives the corresponding cooling devices to operate according to the signal of the driving decoding module; obtaining the corresponding feedback signal when different cooling devices are operating; when the feedback signal is at a high level, determining the corresponding operating cooling device as the faulty device.

[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 for inputting the gating control signal. The first input end of the feedback on-off module is used for electrically connecting with the corresponding cooling device. The second input end of the feedback on-off module is electrically connected with the output end of the feedback decoding module. The output end of the feedback on-off module is electrically connected with the input end of the feedback circuit. The detection circuit further includes a driving decoding module and a plurality of driving on-off modules. The driving decoding module is used for inputting a gating driving signal. The first input end of the driving on-off module is electrically connected with the output end of the driving decoding module. The output end of the driving on-off module is used for electrically connecting with the corresponding cooling device. When the feedback signal type of the cooling device is the first type and there is a faulty device among the plurality of cooling devices, sending the gating control signal to the gating module, and determining the position of the faulty device among the plurality of cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit, includes: when the feedback signal type of the cooling device is the first type and there is a faulty device among the plurality of cooling devices, sending the gating control signal to the feedback decoding module and sending the gating driving signal to the driving 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 driving on-off module sequentially controls the corresponding cooling devices to be turned off according to the signal of the driving decoding module; obtaining the corresponding feedback signal when different cooling devices are turned off; when the feedback signal is at a low level, determining the cooling device that is correspondingly turned off as 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 for inputting the gating control signal. The first input end of the feedback on-off module is used for electrically connecting with the corresponding cooling device. The second input end of the feedback on-off module is electrically connected with the output end of the feedback decoding module. The output end of the feedback on-off module is electrically connected with 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 whether there is a faulty device among the plurality of cooling devices is determined according to the feedback signals corresponding to when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit, and the position of the faulty device is determined when there is a faulty device, including: sending the gating control signal to the feedback 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 conduction time is a preset time; obtaining the feedback signals corresponding to when the paths between different cooling devices and the feedback circuit are conducted; when the frequency and duty cycle of the feedback signal are both within the corresponding preset ranges, determining that the corresponding cooling device is fault-free; when at least one of the frequency and duty cycle of the feedback signal is not within the corresponding preset ranges, determining that the corresponding cooling device is the faulty device.

[0017] 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 for inputting the gating control signal. The first input end of the feedback on-off module is used for electrically connecting with the corresponding cooling device. The second input end of the feedback on-off module is electrically connected with the output end of the feedback decoding module. The output end of the feedback on-off module is electrically connected with the input end of the feedback circuit. The detection circuit further includes a drive decoding module and a plurality of drive on-off modules. The drive decoding module is used for inputting a gating drive signal. The first input end of the drive on-off module is electrically connected with the output end of the drive decoding module. The output end of the drive on-off module is used for electrically connecting with the corresponding cooling device. The method further includes: after determining the position of the faulty device, sending the gating drive signal to the drive decoding module, so that the drive on-off module controls the faulty device to turn off according to the signal of the drive decoding module.

[0018] According to some embodiments of the present application, on the other hand, an energy storage system is provided, including any one of the energy storage inverters.

[0019] The technical solutions provided by the embodiments of the present application have 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 conducts the paths between different cooling devices and the feedback circuit according to the gating control signal. The gating control signal is the signal output by the main control circuit to the gating module through the isolation circuit. The main control circuit determines the position of the faulty device among multiple cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit. In this way, the status of each fan can be independently judged, and it is applicable to both RD and FG feedback mechanisms, saving costs and improving the detection accuracy, solving the problems in the prior art that in the fan control and detection circuit, it is impossible to determine which specific fan has a fault, which is not convenient for later troubleshooting, positioning, maintenance and replacement, and the existing fan control and detection circuit can only support the fan control of the RD feedback type and cannot control the fan of the FG feedback type. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily illustrated by the figures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the figures in the drawings do not constitute a proportional limitation. In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following-described drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

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

[0022] Figure 2 It is a schematic structural diagram of the first energy storage converter provided in the embodiments of the present application;

[0023] Figure 3 It is a schematic structural diagram of the second energy storage converter provided in the embodiments of the present application;

[0024] Figure 4 It is a schematic structural diagram of the third energy storage converter provided in the embodiments of the present application;

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

[0026] Figure 6 It is a schematic flow chart of a detection method for a cooling device provided in the embodiments of the present application;

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

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

[0029] Figure 9 Schematic diagram of yet another specific circuit of an energy storage converter provided in an embodiment of the present application.

[0030] Among them, the above-mentioned 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 implementation manners

[0032] As introduced in the background art, in the fan control and detection circuit in the prior art, when a fan abnormality is detected, it is impossible to determine which specific fan has failed, and all fans can only be stopped simultaneously, which is not convenient for later troubleshooting, positioning, maintenance, and replacement. Moreover, the existing fan control and detection circuit can only support the fan control of the RD feedback type and cannot control the fan of the FG feedback type.

[0033] To solve the problems in the prior art that the fan control and detection circuit cannot determine which specific fan has failed, is not convenient for later troubleshooting, positioning, maintenance, and replacement, and the existing fan control and detection circuit can only support the fan control of the RD feedback type and cannot control the fan of the FG feedback type, an embodiment of the present application provides an energy storage converter and an energy storage system.

[0034] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means more than two, unless otherwise specifically defined.

[0035] Referring to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: the existence of A, the simultaneous existence of A and B, and the existence of B. Additionally, in this text, the character " / " generally represents an "or" relationship between the associated objects before and after.

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

[0038] In the description of the embodiments of the present application, for technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "coupling", "fixing", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] In the corresponding drawings of the embodiments of the present application, for better understanding and convenience of description, the thickness and area of the layer are enlarged. When describing a component (such as a layer, film, region, or substrate) on or on the surface of another component, the component can be "directly" on the surface of the other component, or there can be a third component between the two components. On the contrary, when describing a component on the surface of another component or when a surface of a component forms or is provided with another component, it means that there is no third component between the two components. Additionally, when describing a component "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 on a partial edge of the entire surface.

[0041] In the description of the embodiments of the present application, when a certain component "includes" another component, unless otherwise stated, other components are not excluded, and other components may further be 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" another component (i.e., located on the surface of another component with no other components therebetween), or there may be other components therebetween. In addition, when a component such as a layer, film, region, plate, etc. is "directly located on" another component, or when a component such as a layer, film, region, plate, etc. is located on the surface of another component, it means that no other components are located therebetween.

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

[0043] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present application, many technical details are presented to help the reader better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented.

[0044] As mentioned in the background art, the FG function is a rotational speed feedback mechanism that reflects the rotational speed of the fan by generating a PWM pulse signal. The frequency of this signal is proportional to the rotational speed of the fan and can be used to detect the rotational speed of the fan. The RD function is an operating state 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 rotational speed of the fan, while the RD function is used to monitor the operating state of the fan and provide a fault alarm. These two functions are both important in the control system of the cooling fan, but they serve different purposes and have different working principles. The FG function enables the system to understand the rotational speed of the fan and perform corresponding speed regulation or performance management; the RD function is a safety mechanism that ensures a warning can be issued in a timely manner when the fan fails.

[0045] In the prior art, a fan system includes an isolation circuit, a drive circuit, and a feedback circuit. The fan system is usually powered by 12V or 24V, while the main control circuit is a 3.3V / 5V system. To match the two circuits and reduce the interference of the fan operation on the main control loop, a digital isolator is usually used to isolate the fan system from the main control circuit; the main control circuit outputs a drive signal through the controller DO, which is input to the drive circuit after passing through the isolation circuit to control the on / off of the fan power supply, thereby controlling the start and stop of the fan; the feedback signals in different operating states of the fan are processed and converted, and then input to the DI of the main control circuit controller after passing through the isolation circuit, and the main control circuit determines the operating state of the fan.

[0046] In an energy storage system using an air-cooling solution, multiple fans are usually required to dissipate heat from each component in the device (such as dissipating heat from the IGBT module in the PCS). To control and detect the status of each fan, each fan needs to be configured with a corresponding drive circuit and feedback signal processing circuit, and occupy the corresponding digital isolator channels and the DI / DO pin resources of the main control chip, increasing the circuit complexity and cost.

[0047] Figure 1 A structural schematic diagram of a fan and a detection circuit provided in the prior art is as Figure 1 shown. To reduce costs, a common simplification method is: the controller only outputs one drive signal to drive multiple fans simultaneously; the fan feedback signals are first logically processed (adding AND gates / OR gates according to the type of feedback signal level, or in the form of diodes in parallel, etc.), and then the logically processed signals are input to the feedback signal processing circuit, thus reducing the feedback signal processing circuit to one path.

[0048] For a conventional RD feedback type fan, when all fans are working properly, the feedback signals are all low levels, and the level input to the above feedback circuit is a low level; when any one fan fails and the feedback signal is a high level, regardless of whether other fans are faulty, the level input to the feedback circuit at the back end of the diode is a high level, and at this time the main control circuit can identify the fan failure.

[0049] The above solutions have the following problems:

[0050] 1. Performing logical processing at the front end of the feedback circuit simplifies the detection circuit, but when an abnormal feedback signal is detected, it is impossible to determine which specific fan has failed, which is not convenient for later troubleshooting, positioning, repair, and replacement;

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

[0052] 3. In some systems, there may be a relatively large number of fans configured to dissipate heat for different components (such as IGBT modules, circuit boards, magnetic components, etc.). Since fans are vulnerable parts with a relatively high failure rate, when a single fan fails, all the fans in the above circuit can only be stopped simultaneously. If the position of the faulty fan has little impact on the overall operation of the system and it is necessary to stop this fan alone and maintain the system operation for a period of time, the above circuit cannot achieve this.

[0053] In this embodiment, a power conversion system for energy storage is provided. Figure 2 It is a schematic structural diagram of the power conversion system for energy storage according to the embodiment of the present application. As Figure 2 shown, the power conversion system for energy storage includes:

[0054] a plurality of cooling devices 10;

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

[0056] Wherein, 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 characterizes the operating state of at least one of the cooling devices 10; the gating module 24 is used to sequentially disconnect or conduct the path between different cooling devices 10 and the feedback circuit 23 according to a gating control signal, and the gating control signal is a 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 position of the faulty device among the plurality of cooling devices 10 according to the corresponding feedback signal when the gating module 24 disconnects or conducts the path between different cooling devices 10 and the feedback circuit 23.

[0057] The cooling device in the above embodiments is generally a fan, which is used to dissipate heat from each component in the device in an energy storage system using an air-cooling solution. By adding a corresponding logic circuit (gating module) to the fan feedback loop, the circuit structure can be streamlined while ensuring the accuracy of fault detection and status detection. That is, for fans of the RD feedback type, it is possible to determine which specific fan has a fault; for fans of the FG feedback type, the operating status of each fan can also be judged through the corresponding control strategy.

[0058] Compared with the traditional solution, it avoids configuring a separate feedback circuit and independent chip pin resources for each fan, effectively reducing the circuit cost. At the same time, it can also avoid the functional deficiencies of the combined control and detection circuit, such as being unable to accurately determine the position of the faulty fan and being unable to independently control the faulty fan to turn off.

[0059] As Figure 2 shown, a gating module 24 is added between the original fan 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 correspondingly, so as to realize the independent control of each on-off control circuit.

[0060] 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 working properly; if the feedback signal output is 1, it proves that there is an abnormal fan. However, at this time, it is impossible to determine which fan is abnormal. Therefore, if maintenance is required, all fans need to be turned off and checked one by one to see if there is a fault, which will waste a lot of resources. The gating module 24 can avoid this situation. As long as the main control circuit 21 gives the corresponding control signal DO[1:m] to the gating module 24, the gating module can control different fans to turn on or off.

[0061] For example, there are a total of four fans and all fans are running. At this time, the feedback signal output is 1, proving that there is an abnormal fan. Then the main control circuit 21 gives the corresponding control signals to the gating module 24 in turn as 0111, 1011, 1101, 1110, which respectively correspond to turning off the first fan, the second fan, the third fan and the fourth fan. Since the feedback signal is feedback in real time, there will be a corresponding feedback signal every time a fan is turned off. If the feedback signal output is 0 after turning off the fan, it proves that the other fans except the turned-off fan are all fault-free, so that the currently turned-off fan can be screened out as the faulty fan.

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

[0063] In the above energy storage converter of the present application, the feedback circuit transmits the feedback signal output by the cooling device to the main control circuit in real time. The gating module disconnects or conducts the paths between different cooling devices and the feedback circuit in sequence according to the gating control signal. The gating control signal is the signal output by the main control circuit to the gating module through the isolation circuit. The main control circuit determines the position of the faulty device among multiple cooling devices according to the feedback signal corresponding to the disconnection or conduction of the paths between different cooling devices and the feedback circuit by the gating module. In this way, the status of each fan can be independently judged, and it is applicable to both RD and FG feedback mechanisms, saving costs and improving the detection accuracy, solving the problems in the prior art that in the fan control and detection circuit, it is impossible to determine which specific fan has a fault, which is not convenient for later troubleshooting, positioning, maintenance, and replacement, and the existing fan control and detection circuit can only support the fan control of the RD feedback type and cannot control the fan of the FG feedback type.

[0064] In some embodiments, as Figure 3 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 for inputting 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] A feedback on-off module is added between the original fan feedback signal and the feedback signal processing circuit. The implementation methods include but are not limited to MOS, BJT, or logic AND gates, etc. When the decoded output bus signal is at a high level, the corresponding feedback on-off module conducts; when the decoded output bus signal is at a low level, the corresponding feedback on-off module disconnects.

[0066] The feedback decoding module can be implemented by logic chips such as decoders. When the controller outputs different control signals DO[1:m], the decoded output bus OUT[1:n] outputs different bus level combinations correspondingly, so as to realize the 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 high through the feedback decoding module, and all feedback on-off modules from 1 to n are turned on. The detection logic is the same as that of the traditional circuit. After the feedback signal is detected as abnormal, each feedback on-off module is cyclically disconnected through the feedback decoding module. When the detected feedback signal returns to normal, the fan corresponding to the feedback on-off module that is disconnected at this time is the faulty fan.

[0068] For FG detection, during normal operation, the main control chip cyclically turns on each feedback on-off module through the feedback decoding module for a certain period of time, and detects the feedback signal of the corresponding channel within this period to ensure that the characteristics of the corresponding PWM signal (such as frequency, duty cycle) can be accurately detected during the on time. When the PWM signal is detected as abnormal, the serial number of the feedback on-off module that is turned on at this time is judged to determine the position of the abnormal fan. Among them, the normal PWM signal is 1 kHz and the duty cycle is 50% ± 10%.

[0069] In summary, by decoding the multi-channel gating control signal through the feedback decoding module, the opening or closing of each feedback on-off module can be independently controlled. This means that the system can independently detect the feedback signals of each cooling device (fan), so as to accurately identify which device has a fault or abnormal operation, providing convenience for fault location and maintenance. Compared with the traditional method of separately configuring drive and feedback circuits for each cooling device, the combination of the feedback decoding module and the feedback on-off module can significantly reduce the occupancy of DI / DO pin resources of the main control chip and the number of channels of the digital isolator, thereby reducing the circuit complexity and cost. The use of the gating module allows sharing of the signal processing resources of the main control circuit, and multiple fans can be managed only by different combinations of control signals. When an abnormal feedback signal is detected, the system can isolate the faulty device by turning off the corresponding feedback on-off module while keeping other devices running normally. This ability of independent control can not only quickly respond to faults, but also diagnose and maintain faulty devices without affecting the overall system operation, improving the availability and maintenance efficiency of the system.

[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 gating control module can be implemented by a multiplexer switch or the like.

[0071] Specifically, MOS transistors, BJTs, or logic AND gates are used as the basic building blocks of the feedback on-off module. According to specific application requirements and circuit conditions, the most suitable components can be flexibly selected. MOS transistors and BJTs are commonly used switching components, suitable for fast-response signal on-off control; logic AND gates can be used for signal logic processing to achieve more complex control logics. As switching components, MOS transistors and BJTs have a low on-resistance, which can reduce energy loss in the circuit and improve the efficiency of the overall system. Especially MOS transistors, in high-frequency switching applications, due to their fast switching characteristics and low switching losses, they are very suitable for situations that require frequent control of signal on-off.

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

[0073] Among them, the main control circuit outputs a drive signal through the controller DO, which is input to the drive circuit after passing through the isolation circuit to control the on-off of the fan power supply, and then controls the start and stop of the fan.

[0074] In addition, according to actual requirements, a similar circuit can also be configured at the drive end to achieve independent control and shutdown of a faulty fan.

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

[0076] In an actual system, the fan is a vulnerable component with a relatively high failure rate, but the probability of multiple fans failing simultaneously is very low. When a single fan fails, the above combination of decoding control + on-off control can be applied to the drive end, as Figure 5As shown, the controller can obtain different combinations of drive control buses DRIVE[1:n] by outputting different decoded input control buses DO[1:x], so as to independently control the shutdown of faulty fans.

[0077] Among them, the feedback decoding module and the drive decoding module can be implemented by the same decoding circuit. The main function of the decoding circuit is to convert the input control signal into a set of output signals to control multiple different devices or receive signals from multiple devices. If the control of the drive and feedback signals is based on the same logic and address coding mechanism, then using the same set of decoding circuits can avoid duplicate design and manufacture of two independent decoding modules, saving circuit board space, reducing the number of components, and thus reducing costs. When both the drive circuit and the feedback circuit 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 set of control signals to simultaneously control the drive of multiple cooling devices and receive their feedback signals, reducing the complexity of software programming and the burden on the main control circuit. If the drive and feedback signals follow the same coding rules, then using the same decoding circuit can ensure the consistency and predictability of signal processing, which is very beneficial for debugging and later maintenance. System designers can more easily understand and track the signal flow, and maintenance personnel can also find solutions more quickly when problems occur. Integrating the drive decoding and feedback decoding in one circuit helps to achieve standardization and modularization of the design. This means that the same circuit can be widely applied to various similar demand scenarios, reducing the workload of re-design, and also facilitating mass production and quality control.

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

[0079] Specifically, the multiplexer allows multiple input signals to selectively share an output channel. This design can effectively manage and route the feedback signals of multiple cooling devices (such as fans), enabling them to be detected one by one or in groups by the main control circuit without setting up independent feedback circuits for each device, greatly simplifying the system architecture. Using the multiplexer can significantly reduce the number of input pins (DI) on the main control chip because there is no need to configure a separate input port for each fan. This helps to reduce the circuit board area, reduce peripheral components and save costs, and also reduces the use of digital isolators, further reducing the complexity and cost of the system. By using the multiplexer, independent detection of each fan can be achieved. When an abnormal feedback signal is detected, the specific faulty fan can be immediately located, rather than just knowing that there is a fan fault but not being sure which one. This helps to quickly troubleshoot faults, reduce system downtime, and improve maintenance efficiency.

[0080] Among them, the fan drive circuit and the feedback circuit usually need to configure power supply modules, level conversion, signal processing and other circuits, and the circuit structure is relatively complex. When there are many fans, multiple corresponding circuits need to be configured repeatedly. By adding a decoding control + on-off control combined circuit or a gating control circuit to the fan drive control and feedback detection circuit, and cooperating with the corresponding control strategy, the detection accuracy can be improved (judging which specific fan has a fault or the operating state of each fan), reducing the number of fan drive circuits and feedback circuits, as well as the channel pin resources occupied by the control chip and the digital isolation chip. At the same time, the faulty fan can be independently controlled to turn off.

[0081] In this embodiment, a detection method for a cooling device is further provided. The detection method is applied to the main control circuit in the detection circuit of the cooling device of any one of the above-mentioned energy storage converters. Figure 6 It is a flowchart of the detection method for the cooling device according to the embodiment of the present application, as Figure 2 and Figure 6 shown. The detection method includes the following steps:

[0082] Step S101, determine the type of the feedback signal of the above-mentioned cooling device 10. The above-mentioned feedback signal type is the first type or the second type. The above-mentioned first type is a digital level signal, and the above-mentioned second type is a PWM signal;

[0083] Step S102, when the feedback signal type of the above-mentioned cooling device 10 is the above-mentioned first type and there is a faulty device among the multiple above-mentioned cooling devices 10, send a gating control signal to the gating module 24, and determine the position of the faulty device among the multiple above-mentioned cooling devices 10 according to the above-mentioned feedback signal corresponding to when the gating module 24 disconnects or conducts the path between different above-mentioned cooling devices 10 and the above-mentioned feedback circuit 23;

[0084] Step S103, when the feedback signal type of the above-mentioned cooling device 10 is the above-mentioned second type, send the above-mentioned gating control signal to the gating module 24, and determine whether there is a faulty device among the multiple above-mentioned cooling devices 10 and determine the position of the faulty device when there is a faulty device according to the above-mentioned feedback signal corresponding to when the gating module 24 disconnects or conducts the path between different above-mentioned cooling devices 10 and the above-mentioned feedback circuit 23.

[0085] Among them, the cooling device is generally a fan. When the feedback signal type is the first type, the feedback type of the cooling device is the feedback of RD. When the feedback signal type is the second type, the feedback type of the cooling device is the FG feedback. According to the different feedback types of the cooling device, the gating logic and fault determination methods implemented for the cooling device are also different.

[0086] When the feedback type of the cooling device is RD feedback, the main control circuit collects the feedback signal in real time. When the feedback signal is a signal indicating a fault, the system enables the selection of the cooling device, that is, sequentially turns on or turns off the cooling devices to screen for the faulty device. When the feedback type of the cooling device is FG feedback, the main control device sequentially turns on the cooling devices from the beginning, and each time a cooling device is turned on, it is turned on for a preset time to collect the PWM signal of the cooling device. Then, based on the PWM signals of all the collected cooling devices, it is determined whether there is a faulty device and the location of the faulty device.

[0087] In the above detection method of the cooling device of the present application, the feedback signal output by the cooling device is transmitted to the main control circuit in real time through the feedback circuit. The selection module sequentially disconnects or conducts the path between different cooling devices and the feedback circuit according to the selection control signal. The selection control signal is the signal output by the main control circuit to the selection module through the isolation circuit. The main control circuit determines the location of the faulty device among multiple cooling devices according to the corresponding feedback signal when the selection module disconnects or conducts the path between different cooling devices and the feedback circuit. In this way, the status of each fan can be independently judged, and it is adapted to both RD and FG feedback mechanisms, saving costs and improving the detection accuracy, solving the problems in the prior art that in the fan control and detection circuit, it is impossible to determine which specific fan has a fault, which is not convenient for later troubleshooting, positioning, maintenance and replacement, and the existing fan control and detection circuit can only support the fan control of the RD feedback type and cannot control the fan of the FG feedback type.

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

[0089] Step S201, obtain the feedback signal of the cooling device 10 in real time;

[0090] Step S202, when the feedback signal is at a low level, determine that there is no such faulty device among the multiple cooling devices 10;

[0091] Step S203, when the feedback signal is at a high level, determine that there is such faulty device among the multiple cooling devices 10.

[0092] Among them, 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, it is set that a low level is a signal indicating normal operation of the device, and a high level is a signal indicating the existence of a faulty device. It should be noted that the signals in this embodiment are all for illustrative purposes. In some embodiments, the signals indicating normal operation of the device and the signals indicating the existence of a faulty device can also be set according to actual needs.

[0093] Specifically, by monitoring the feedback signal in real time, the system can quickly identify the fault state of the cooling equipment and avoid misjudgment caused by signal delay or misreading. Since the feedback signal in the high-level state can be detected in real time, the system can immediately take measures, that is, judge the position of the faulty fan through the on-off control logic. By accurately identifying the faulty equipment, the maintenance personnel can replace or repair the equipment targeted, without checking all the equipment, saving maintenance costs and downtime. In addition, the ability to independently control the faulty equipment can prevent the entire system from shutting down due to a single equipment failure, improving the availability and stability of the system.

[0094] In some embodiments, such as Figure 2 and Figure 3 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 electrically connected to the corresponding cooling equipment 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 equipment 10 is the first type and there is a faulty equipment among the plurality of cooling equipment 10, the gating control signal is sent to the gating module 24, and the position of the faulty equipment among the plurality of cooling equipment 10 is determined according to the corresponding feedback signal when the gating module 24 disconnects or conducts the paths between different cooling equipment 10 and the feedback circuit 23, including the following steps:

[0095] Step S10211, when the feedback signal type of the cooling equipment 10 is the first type and there is a faulty equipment among the plurality of cooling equipment 10, send the gating control signal to the feedback decoding module 241, so that the feedback on-off module 242 sequentially disconnects the paths between different cooling equipment 10 and the feedback circuit 23 according to the signal of the feedback decoding module 241;

[0096] Step S10212, obtain the corresponding feedback signal when disconnecting the paths between different cooling equipment 10 and the feedback circuit 23;

[0097] Step S10213, when the feedback signal is at a low level, determine the cooling equipment 10 that is correspondingly turned off as the faulty equipment.

[0098] Among them, when the feedback signal type is the first type, the feedback type of the cooling device is the feedback of RD. For the fans with the RD feedback mechanism, all the fans output a feedback signal to the main control circuit 21. For example, if the feedback signal output is 0, it proves that all the fans are working properly. 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 the fans are running. At this time, the feedback signal output is 1, which proves that there is an abnormal fan. Then, the control signals corresponding to the gating module 24 sent by the main control circuit 21 are 0111, 1011, 1101, and 1110 in sequence, corresponding to turning off the first fan, the second fan, the third fan, and the fourth fan respectively. Since the feedback signal is a real-time feedback, there will be a corresponding feedback signal every time a fan is turned off. If the feedback signal output is 0 after turning off the fan, it proves that there is no fault in the other fans except the turned-off fan. In this way, the currently turned-off fan can be screened out as the faulty fan.

[0099] Specifically, when the system detects that the feedback signal type is the first type (i.e., the RD type, and the high level is output when there is a fault) and there is at least one faulty device, the main control circuit will send a gating control signal to the feedback decoding module 241. The function of the decoding module is to convert this control signal into a control instruction for the corresponding feedback on-off module 242, so that the feedback on-off module can sequentially disconnect the path between it and the feedback circuit 23 according to the decoded signal, thereby checking each cooling device one by one. The system continuously detects the input signal of the feedback circuit 23. When the path of the feedback on-off module is disconnected, if the faulty device is connected to this module, its high-level feedback signal will no longer be detected by the feedback circuit, while the low-level signals of other normally operating devices will continue to be detected. If the feedback signal returns from the high level to the low level after a certain disconnection operation, it indicates that the faulty device is connected to the currently disconnected feedback on-off module 242. Therefore, the system can determine that it is exactly in this path disconnection operation that the corresponding cooling device is the faulty device.

[0100] Through the decoding control and the dynamic path disconnection strategy, the system can accurately identify which specific cooling device has a fault, rather than just detecting that there is a faulty device in the system. This accurate fault location ability is crucial for subsequent fault handling and maintenance. Once the faulty device is located, the maintenance personnel can quickly take measures on the faulty device, such as replacement or repair, without having to check all the devices. This not only reduces the maintenance cost but also reduces the system downtime caused by fault troubleshooting. The design of the gating module allows the main control circuit to independently control each cooling device. This means that even after detecting a faulty device, the system can still maintain the normal operation of other cooling devices, ensuring that key components do not overheat and improving the overall operation efficiency and stability of the system.

[0101] The above embodiments do not require independent control of the shutdown of a faulty fan. Therefore, a drive decoding module and multiple drive on-off modules are not added, simplifying the circuit and saving costs.

[0102] If independent control of the shutdown of a faulty fan is required, the above drive decoding module and multiple drive on-off modules can be added, as in the following embodiments.

[0103] In some embodiments, such as Figure 2 and Figure 5 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. The detection circuit 20 further includes a drive decoding module 26 and multiple drive on-off modules 27. The drive decoding module 26 is used to input a gating drive signal. The first input end of the drive on-off module 27 is electrically connected to the output end of the drive decoding module 26. The output end of the drive 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 multiple cooling devices 10, the gating control signal is sent to the gating module 24, and the position of the faulty device among multiple cooling devices 10 is determined according to the corresponding feedback signal when the gating module 24 disconnects or conducts 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 there is a faulty device among multiple cooling devices 10, control all the cooling devices 10 to be turned off;

[0105] Step S10222, send the gating control signal to the feedback decoding module 241 and send the gating drive signal to the drive decoding module 26, so that the feedback on-off module 242 sequentially conducts the path 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 device 10 to operate according to the signal of the drive decoding module 26;

[0106] Step S10223, obtain the corresponding feedback signal when different cooling devices 10 are operating;

[0107] Step S10224, when the feedback signal is at a high level, determine that the corresponding operating 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 paths of each device can be turned off in sequence to screen out the faulty device. Or all cooling devices can be turned on first, and then each device can be directly turned off in sequence to screen out the faulty device. Or all devices can be turned off first, and then turned on in sequence to screen out the faulty device.

[0109] That is, when the system detects a faulty device in the feedback signal of the RD type, the system will first control all cooling devices 10 to turn off. This is to ensure that only the selected device is in the operating state during the fault detection process, avoiding signal interference from other devices. The main control circuit simultaneously sends a gating control signal to the feedback decoding module 241 and sends 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 according to the received control signals. The feedback decoding module 241 sequentially conducts the paths between different cooling devices and the feedback circuit 23, while the drive decoding module 26 synchronously drives the corresponding cooling devices to operate. The system dynamically detects 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 one by one without being affected by other devices. If during a certain inspection, the system detects that the feedback signal is at a high level, this indicates that the cooling device selected and driven at this time is the faulty device. Because when the cooling device is operating normally, the RD feedback signal should be at a low level, and any change to a high level indicates a device fault.

[0110] Through this gating and collaborative control mechanism, the system can accurately identify and locate the faulty cooling device without blindly checking all devices, which greatly improves the efficiency and accuracy of fault troubleshooting. This method not only provides a fault detection function but also supports the independent control of individual cooling devices. This means that the system can isolate or stop the faulty device separately while keeping other devices operating normally, which is crucial for maintaining the overall stability and cooling efficiency of the system. Through the collaborative work of the drive decoding and feedback decoding modules, the system can dynamically adjust the cooling strategy. For example, after detecting a faulty device, it can quickly adjust the operating status of other devices to ensure the cooling requirements of key components, improving the intelligent response and adaptive ability of the system. Once the faulty device is located, maintenance personnel can repair or replace the device without shutting down the entire system for inspection, which reduces the maintenance cost and also reduces the system downtime, improving the availability and operating efficiency of the device.

[0111] In some embodiments, such asFigure 2 and Figure 5 As shown in Figure 5 , 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 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 further includes a driving decoding module 26 and a plurality of driving on-off modules 27. The driving decoding module 26 is used to input a gating 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. 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 plurality of cooling devices 10, the gating control signal is sent to the gating module 24, and the position of the faulty device among the plurality of cooling devices 10 is determined according to the corresponding feedback signal when the gating module 24 disconnects or conducts the paths 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 there is a faulty device among the plurality of cooling devices 10, send the gating control signal to the feedback decoding module 241 and send the gating driving signal to the driving 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 driving on-off module 27 sequentially controls the corresponding cooling devices 10 to be turned off according to the signal of the driving decoding module 26;

[0113] Step S10232: Obtain the corresponding feedback signal when different cooling devices 10 are turned off;

[0114] Step S10233: When the feedback signal is at a low level, determine the corresponding cooling device 10 that is turned off as the faulty device.

[0115] Specifically, when the system detects a faulty device, 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. The feedback decoding module and the drive decoding module control the disconnection and conduction states of the feedback on-off module 242 and the drive on-off module 27 respectively according to the received control signals. The feedback decoding module 241 disconnects the paths between different cooling devices and the feedback circuit 23 in sequence according to the encoding of the gating control signal, while the drive decoding module 26 controls the corresponding drive on-off module 27 to turn off the relevant cooling devices in sequence. This collaborative working mode ensures the synchronous progress of fault detection and device control, and can detect and turn off devices one by one until the faulty device is located. The system continuously monitors the feedback signal received by the feedback circuit 23. When a certain cooling device is disconnected or turned off, if the device is a faulty device, the system will observe that the feedback signal changes from an abnormal high level back to a normal low level state. If the feedback signal changes from high level to low level after disconnecting or turning off a certain cooling device, then it can be determined that the cooling device is a faulty device. Because under normal circumstances, the RD feedback signal is at a low level and only rises to a high level when the device fails.

[0116] Through the collaborative work of the feedback decoding module, the feedback on-off module, the drive decoding module and the drive on-off module, the system can accurately locate the faulty cooling device, avoiding blind inspection of the entire system, and improving the efficiency and accuracy of fault troubleshooting. After detecting a faulty device, the system can only turn off the device while keeping other cooling devices running normally, which avoids the impact of the shutdown of the entire system on the cooling efficiency and ensures that the system can still maintain a high operating stability when some devices fail. The accurate positioning and independent control shutdown of the faulty device means that maintenance personnel can directly deal with the faulty device without having to troubleshoot and shut down the entire system, thus reducing the maintenance cost and shortening the shutdown time.

[0117] Figure 7 For the schematic diagram of a specific circuit of an energy storage converter provided in the embodiments of the present application, as Figure 7 shown, the cooling device is a fan. In the case where the feedback type is RD, it is necessary to independently control the shutdown of the faulty fan, and the feedback decoding module and the drive decoding module are implemented by using the same decoding circuit (i.e., Figure 7 the drive + feedback decoding circuit in), this method optimizes the circuit design by sharing the decoding module and the collaborative control mechanism, reduces the circuit board space and component cost, and also improves the utilization rate of the 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 the decoding circuit

[0119]

[0120] The truth table of the decoding circuit is shown in Table 1. As Figure 7 shown in Table 1, when working normally, the main control circuit DO_DRV outputs a high level, and DO_EN outputs a low level (turn off the decoding circuit enable signal). All the outputs of the decoding circuit bus OUT[8..1] are high levels, and the drive switches and feedback switches are all fully open.

[0121] If the fan runs normally, the level input to the feedback circuit is low; when the fan runs abnormally, the level input to the feedback circuit becomes high. At this time, the main control circuit keeps the DO_DRV signal at a high level unchanged, sets the DO_EN signal high to enable the decoding circuit, and controls the output of the decoding circuit through DO[3..1], sequentially turning off the corresponding drive switches and feedback switches. For example, when the outputs of OUT[3..1] are 010 (disconnect the drive switch and feedback switch 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 running, keep the above output state to turn off the drive of fan 3; if the system needs to stop for maintenance and turn off all fans, set the DO_DRV signal low.

[0122] Based on the above solution, the feedback switch and the drive switch control can also be independent of each other, and a decoding circuit can be used separately on the drive side and the feedback side, as Figure 8 shown. Figure 8 The drive decoding circuit in

[0123] is the above-mentioned drive decoding module, and the feedback decoding circuit is the above-mentioned feedback decoding module. Figure 2 and Figure 3 shown, in some embodiments, the gating module includes a feedback decoding module 241 and a plurality of feedback switch 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 switch module 242 is used to be electrically connected to the corresponding cooling device 10. The second input end of the feedback switch module 242 is electrically connected to the output end of the feedback decoding module 241. The output end of the feedback switch 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, send the gating control signal to the gating module 24, and determine whether there is a faulty device among the plurality of cooling devices 10 and determine the position of the faulty device when there is a faulty device according to the corresponding feedback signals when the gating module 24 disconnects or conducts the paths between different cooling devices 10 and the feedback circuit 23, including 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 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 conduction time is a preset time.

[0125] Step S1032: Obtain the corresponding feedback signal when the paths between different cooling devices 10 and the feedback circuit 23 are conducted.

[0126] Step S1033: When both the frequency and the duty cycle of the feedback signal are within the corresponding preset ranges, determine that the corresponding cooling device 10 is fault-free.

[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, determine that the corresponding cooling device 10 is the faulty device.

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

[0129] Specifically, the main control circuit sends a gating control signal to the feedback decoding module 241. The feedback decoding module sends control instructions to different feedback on-off modules 242 according to the signal, so that they are sequentially conducted within a preset time to establish 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 that the frequency and duty cycle of the signal can be accurately measured. The feedback circuit 23 continuously monitors the PWM signals transmitted through each feedback on-off module. Since the signals of the cooling devices have specific frequency and duty cycle characteristics during normal operation, by monitoring these characteristics, the system can judge the operating state of the devices. The system compares the received feedback signal with the preset signal characteristic range. If both the frequency and the duty cycle of the signal fall within the preset range, it indicates that the cooling device is operating normally; otherwise, if the frequency or the duty cycle of the signal deviates from the preset range, the system determines that the cooling device is a faulty device. The preset range is usually set according to the specifications and working conditions of the cooling device.

[0130] By dynamically monitoring the FG feedback signals of different cooling devices, the system can accurately identify which device's PWM signal is abnormal, thereby locating the faulty device, avoiding blind inspections of all devices, and improving the efficiency and accuracy of fault detection. Since the frequency and duty cycle of the PWM signal can directly reflect the operating state of the cooling device, this signal feature-based detection method can significantly reduce the probability of false alarms compared to simple level detection (such as RD type signals), especially in complex and variable operating environments. The FG type signal contains 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 devices to compensate for the effect of the faulty device, thereby improving the overall system stability and reliability. The precise location of the faulty device means that maintenance personnel can directly repair or replace the faulty device without inspecting the entire system, which not only reduces maintenance costs but also significantly reduces the system downtime caused by fault troubleshooting.

[0131] In some embodiments, such as Figure 5 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 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 further includes a drive decoding module 26 and a plurality of drive on-off modules 27. The drive decoding module 26 is used to input a gating drive signal. The first input end of the drive on-off module 27 is electrically connected to the output end of the drive decoding module 26. The output end of the drive 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 drive decoding module 26 so that the drive on-off module 27 controls the faulty device to turn off according to the signal of the drive decoding module 26.

[0132] Specifically, through the setting of the feedback decoding module 241 and the plurality of feedback on-off modules 242, the system can open the paths between different cooling devices and the feedback circuit 23 one by one according to the gating control signal, and capture and analyze the feedback signals of the devices at the same time. 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 it is a high level of the RD type or a frequency / duty cycle abnormality of the FG type), the system can determine which cooling device is the source of the fault through the cooperation of the feedback decoding module 241 and the feedback on-off module 242. This is accomplished by sending the gating control signal to the feedback decoding module 241, so that it controls the feedback on-off module 242 in turn, and checks the feedback signals of each device one by one. After the location of the faulty device is determined, the system will use the driving decoding module 26 and the driving on-off module 27 to independently control the shutdown of the faulty device. This is done by sending the gating drive signal to the driving decoding module 26, so that it controls the conduction or disconnection of the driving on-off module 27 according to the signal, so as to only shut down the faulty device that has been located.

[0133] This approach allows the system to accurately locate the faulty device among many cooling devices, avoiding the need to shut down the entire system 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 impact of the faulty device on the overall system cooling performance, ensuring the normal operating temperature of key components, and improving the overall stability and efficiency of the system. The rapid location and independent control shutdown of the faulty device greatly simplifies the maintenance process. Maintenance personnel can take measures directly for the faulty device without the need for extensive system troubleshooting, saving a lot of time and resources.

[0134] Figure 9 is a schematic diagram of a specific circuit of another energy storage converter provided in an embodiment of the present application, such as Figure 9 As shown, the cooling device is a fan. In the case of the feedback type FG, the faulty fan needs to be turned off independently, 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 a PWM speed control signal as required, DO_EN outputs a low level (turning off the enable signal of the drive decoding circuit), and all the bus outputs OUT[8..1] of the drive decoding circuit are at a high level. The drive is fully open and speed control is performed according to the signal characteristics of the main control circuit DO_DRV.

[0138] On the feedback side, the main control circuit DO[6..4] outputs cyclically, enabling the feedback gating circuit SEL[3..1] to cyclically switch and open channels according to the above truth table, and sequentially detecting the feedback signal characteristics (frequency, duty cycle, etc.) of the fans corresponding to each channel.

[0139] When an abnormality occurs in the operation of a certain fan, for example, fan 5, when DO[6..4] outputs 100, the feedback signal DI_FEED will detect a signal abnormality and can simultaneously determine the position of the faulty fan at this time. If the system needs to continue running at this time, the output of the main control circuit DO_DRV remains in its original state, DO_EN is switched to a high level to turn on the drive decoding circuit, and at the same time, the output of DO[3..1] is adjusted to 100 to turn off fan 5; if the system needs to be shut down for maintenance and all fans are to be turned off, the DO_DRV signal can be set low.

[0140] Similarly, if independent control of the faulty fan shutdown is not required, the above drive decoding module and drive on / off module can be removed, which can simplify the circuit and reduce costs.

[0141] In the above embodiments, the number of fans is taken as 8 as an example. Referring to the foregoing technical solutions, if the number of fans is increased or decreased, the corresponding decoding circuit and gating circuit configurations can be optimized and adjusted.

[0142] In addition, the circuit modules on the drive side and the feedback side can be selected and configured according to actual needs, and different combinations of the decoding circuit, gating circuit, drive on / off, and feedback on / off are applied to achieve different requirements. At the same time, there can be multiple implementation forms for each circuit module. For example, the decoding circuit can use a codec / demultiplexer, the gating circuit can use an analog multiplexer, and the on / off control can be implemented through logic AND gates / logic OR gates / MOS switches, etc.

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

[0144] This energy storage system can independently judge the status of each fan in the energy storage converter, and is suitable for both RD and FG feedback mechanisms, saving costs and improving detection accuracy. It solves the problems in the prior art that the fan control and detection circuit cannot determine which specific fan has failed, which is not convenient for later troubleshooting, positioning, maintenance and replacement, and the existing fan control and detection circuit can only support the fan control of the RD feedback type and cannot control the fan of the FG feedback type.

[0145] It should also be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, commodity or device including 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. In the above energy storage converter of the present application, the feedback signal output by the cooling device is transmitted to the main control circuit in real time through the feedback circuit. The gating module sequentially disconnects or conducts the paths between different cooling devices and the feedback circuit according to the gating control signal. The gating control signal is the signal output by the main control circuit to the gating module through the isolation circuit. The main control circuit determines the position of the faulty device among multiple cooling devices according to the feedback signal corresponding to the path when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit. In this way, the status of each fan can be independently judged, and it is suitable for both RD and FG feedback mechanisms, saving costs and improving detection accuracy. It solves the problems in the prior art that the fan control and detection circuit cannot determine which specific fan has failed, which is not convenient for later troubleshooting, positioning, maintenance and replacement, and the existing fan control and detection circuit can only support the fan control of the RD feedback type and cannot control the fan of the FG feedback type.

[0148] 2. The detection method of the above cooling device of the present application transmits the feedback signal output by the cooling device to the main control circuit in real time through a feedback circuit. The gating module sequentially disconnects or conducts the paths between different cooling devices and the feedback circuit according to the gating control signal. The gating control signal is the signal output by the main control circuit to the gating module through an isolation circuit. The main control circuit determines the position of the faulty device among multiple cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit. In this way, the status of each fan can be judged independently, and it is applicable to both RD and FG feedback mechanisms, saving costs and improving the detection accuracy, solving the problems in the prior art that in the fan control and detection circuit, it is impossible to judge which specific fan has a fault, which is not convenient for later troubleshooting, positioning, maintenance and replacement, and the existing fan control and detection circuit can only support the fan control of the RD feedback type and cannot control the fan of the FG feedback type.

[0149] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present application. In actual applications, various changes can be made in form and details without departing from the spirit and scope of the present application. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. An energy storage converter, characterized in that, Including: Multiple cooling devices; The detection circuit of the cooling device, the detection circuit includes a main control circuit, an isolation circuit, a feedback circuit and a gating module which are electrically connected. The first output end of the main control circuit is electrically connected to the first input end of the isolation circuit. The feedback output end of the isolation circuit is electrically connected to the total input end of the gating module. The sub-input ends of the gating module are respectively used to be electrically connected to each cooling device. The output end of the gating module is electrically connected to the input end of the feedback circuit. The output end of the feedback circuit is electrically connected to the second input end of the isolation circuit. The second output end of the isolation circuit 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 state of at least one cooling device; the gating module is used to sequentially disconnect or conduct the path between different cooling devices and the feedback circuit according to the gating control signal. The gating control signal is the 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 position of the faulty device among the multiple cooling devices according to the feedback signal corresponding to when the gating module disconnects or conducts the path between different cooling devices and the feedback circuit.

2. The energy storage converter according to claim 1, wherein 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 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 transistor, a BJT and a logic AND gate.

4. The energy storage converter according to claim 1, wherein, The detection circuit further includes: A driving circuit, the input end of the driving circuit is electrically connected to the driving output end of the isolation circuit for inputting 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 cooling device to operate.

5. The energy storage converter according to claim 4, characterized in that, The detection circuit further includes: A driving decoding module, the input end of the driving decoding module is electrically connected to the isolation circuit for inputting a gating driving signal. The gating driving signal is output by the main control circuit to the driving decoding module through the isolation circuit, and the gating driving signal is used to independently drive each cooling device 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.

6. The energy storage converter according to claim 1, wherein, The gating module includes a multiplexer switch.

7. A detection method for 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 any one of claims 1 to 6 of the energy storage converter, and the detection method includes: Determine the type of the feedback signal of the cooling device, where the type of the feedback signal is the first type or the second type, the first type is a digital level signal, and the second type is a PWM signal; When the type of the feedback signal of the cooling device is the first type and there is a faulty device among multiple cooling devices, send a gating control signal to the gating module, and determine the position of the faulty device among multiple cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the path between different cooling devices and the feedback circuit; When the type of the feedback signal of the cooling device is the second type, send the gating control signal to the gating module, and determine whether there is a faulty device among multiple cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the path between different cooling devices and the feedback circuit, and determine the position of the faulty device when there is a faulty device; 8. The detection method of the cooling device according to claim 7, characterized in that, When the type of the feedback signal of the cooling device is the first type, before sending the gating control signal to the gating module through the isolation circuit, the method further includes: Obtain the feedback signal of the cooling device in real time; When the feedback signal is a low level, determine that there is no faulty device among multiple cooling devices; When the feedback signal is a high level, determine that there is a faulty device among multiple cooling devices.

9. The detection method of the cooling device according to claim 7, 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. The output end of the feedback on-off module is electrically connected to the input end of the feedback circuit. When the type of the feedback signal of the cooling device is the first type and there is a faulty device among multiple cooling devices, send the gating control signal to the gating module, and determine the position of the faulty device among multiple cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the path between different cooling devices and the feedback circuit, including: When the type of the feedback signal of the cooling device is the first type and there is a faulty device among multiple cooling devices, send the gating 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; Obtain the corresponding feedback signal when disconnecting the paths between different cooling devices and the feedback circuit; When the feedback signal is a low level, determine that the corresponding closed cooling device is the faulty device.

10. The detection method of the cooling device according to claim 7, characterized in that, 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 further includes a driving decoding module and a plurality of driving on-off modules. The driving decoding module is used to input a 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 there is a faulty device among the plurality of cooling devices, sending the gating control signal to the gating module, and determining the position of the faulty device among the plurality of cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit includes: When the feedback signal type of the cooling device is the first type and there is a faulty device among the plurality of cooling devices, control all the cooling devices to turn off; Send the gating control signal to the feedback decoding module and send the gating driving signal to the driving 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 driving on-off module sequentially drives the corresponding cooling devices to operate according to the signal of the driving decoding module; Obtain the corresponding feedback signals when different cooling devices are operating; When the feedback signal is at a high level, determine the cooling device corresponding to the operation as the faulty device.

11. The detection method of the cooling device according to claim 7, characterized in that, 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 further includes a driving decoding module and a plurality of driving on-off modules. The driving decoding module is used to input a 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 there is a faulty device among the plurality of cooling devices, sending the gating control signal to the gating module, and determining the position of the faulty device among the plurality of cooling devices according to the corresponding feedback signal when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit includes: When the feedback signal type of the cooling device is the first type and there is a faulty device among multiple cooling devices, send the gating control signal to the feedback decoding module and send the gating drive signal 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 makes the drive on-off module sequentially control the corresponding cooling devices to shut down according to the signal of the drive decoding module; Obtain the corresponding feedback signals when different cooling devices are shut down; When the feedback signal is at a low level, determine that the corresponding shut-down cooling device is the faulty device.

12. The detection method of the cooling device according to claim 7, 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. 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, send the gating control signal to the gating module, and determine whether there is a faulty device among multiple cooling devices according to the feedback signals corresponding to when the gating module disconnects or conducts the paths between different cooling devices and the feedback circuit, and determine the location of the faulty device when there is a faulty device, including: Send the gating control signal to the feedback 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 conduction time is a preset time; Obtain the corresponding feedback signals when the paths between different cooling devices and the feedback circuit are conducted; When both the frequency and duty cycle of the feedback signal are within the corresponding preset ranges, determine that the corresponding cooling device is fault-free; When at least one of the frequency and duty cycle of the feedback signal is not within the corresponding preset ranges, determine that the corresponding cooling device is the faulty device.

13. The detection method of the cooling device according to claim 7, 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. The output end of the feedback on-off module is electrically connected to the input end of the feedback circuit. The detection circuit further includes a drive decoding module and multiple drive on-off modules. The drive decoding module is used to input the gating drive signal. The first input end of the drive on-off module is electrically connected to the output end of the drive decoding module. The output end of the drive on-off module is used to be electrically connected to the corresponding cooling device. The method further includes: After determining the location of the faulty device, a strobe drive signal is sent to the drive decoding module so that the drive on / off module controls the faulty device to turn off according to the signal of the drive decoding module.

14. A energy storage system, characterized in that, Comprising the energy storage converter according to any one of claims 1 to 6.

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