Monitoring circuit, energy storage outdoor cabinet and monitoring method

Abstract

The invention relates to the technical field of energy storage, in particular to a monitoring circuit, an energy storage outdoor cabinet and a monitoring method.The monitoring circuit is applied to the energy storage outdoor cabinet and comprises a positive bus and a negative bus; the cabin door monitoring module is arranged in any one of the positive electrode bus and the negative electrode bus in series and is configured to monitor the cabin door state of the energy storage outdoor cabinet, and the cabin door monitoring module is switched on when the cabin door state is open; the early warning driving module is connected with the positive electrode bus and the negative electrode bus and is configured to send out an early warning signal based on the current flowing through the early warning driving module; and the maintenance monitoring module is connected in parallel with the early warning driving module, and is configured to monitor the state of a maintenance switch of the energy storage outdoor cabinet and short-circuit the early warning driving module when the state of the maintenance switch is closed, so as to monitor the state of the cabin door of the energy storage outdoor cabinet.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and in particular, to a monitoring circuit, an outdoor energy storage cabinet, and a monitoring method. Background Art

[0002] An outdoor energy storage cabinet is an energy storage device composed of a battery module, an Energy Management System (EMS), a Battery Management System (BMS), a Power Conversion System (PCS), a thermal management system, a fire protection system, and other components.

[0003] The application scenarios of outdoor energy storage cabinets are basically in outdoor environments. However, the industry does not monitor and control the status of the cabinet doors of outdoor cabinets, which may lead to safety accidents when non-maintenance personnel open the cabinet doors of outdoor cabinets, or the energy storage system may malfunction due to rain, sand, and dust eroding electrical components because maintenance personnel forget to close the cabinet doors of outdoor cabinets. Summary of the Invention

[0004] This application provides a monitoring circuit, an outdoor energy storage cabinet, and a monitoring method, aiming to monitor the status of the cabinet doors of outdoor energy storage cabinets.

[0005] In a first aspect, this application provides a monitoring circuit applied to an outdoor energy storage cabinet, including: a positive bus and a negative bus; a cabinet door monitoring module connected in series in either the positive bus or the negative bus, configured to monitor the status of the cabinet door of the outdoor energy storage cabinet and conduct when the status of the cabinet door is open; an early warning driving module connected to the positive bus and the negative bus, configured to issue an early warning signal based on the current flowing through the early warning driving module; and a maintenance monitoring module connected in parallel with the early warning driving module, configured to monitor the status of the maintenance switch of the outdoor energy storage cabinet and short-circuit the early warning driving module when the status of the maintenance switch is closed.

[0006] In some embodiments, the cabinet door monitoring module includes: a detection switch connected in series in either the positive bus or the negative bus, and the detection switch is configured to adjust the switch status based on the status of the cabinet door of the outdoor energy storage cabinet.

[0007] In some embodiments, the detection switch includes a travel switch.

[0008] In some embodiments, the maintenance monitoring module includes: a low-voltage power supply, a control unit, and a maintenance switch; the low-voltage power supply, the control unit, and the maintenance switch are connected in series to form a maintenance circuit; the control unit is further connected to the positive bus and the negative bus, and is configured to electrically connect the positive bus and the negative bus in response to the conduction of the maintenance circuit to short-circuit the warning driving module.

[0009] In some embodiments, the control unit includes a maintenance relay, the control end of the maintenance relay is connected to the low-voltage power supply and the maintenance switch, and the switch end of the maintenance relay is connected to the positive bus and the negative bus.

[0010] In some embodiments, the warning driving module is based on a coil, and the coil is coupled to the energy management system corresponding to the energy storage outdoor cabinet.

[0011] In some embodiments, the monitoring circuit further includes: a lighting component, which is arranged in the energy storage outdoor cabinet and is connected in series in either the positive bus or the negative bus.

[0012] In a second aspect, the present application provides an energy storage outdoor cabinet, including: the monitoring circuit provided in the first aspect above, and an energy management system communicatively connected to the monitoring circuit.

[0013] In some embodiments, a battery compartment is internally provided with a first monitoring circuit, and the first monitoring circuit includes the monitoring circuit provided in the first aspect above; an electrical compartment is internally provided with a second monitoring circuit, and the second monitoring circuit includes the monitoring circuit provided in the first aspect above; the positive buses of the first monitoring circuit and the second monitoring circuit are arranged in parallel, and the negative buses of the first monitoring circuit and the second monitoring circuit are arranged in parallel.

[0014] In some embodiments, the energy management system is configured to perform a first-level alarm in response to a first warning signal sent by the first monitoring circuit, or perform a second-level alarm in response to a second warning signal sent by the second monitoring circuit, or perform a third-level alarm in response to the first warning signal and the second warning signal; wherein, the alarm levels of the first-level alarm, the second-level alarm, and the third-level alarm increase in sequence.

[0015] In some embodiments, the energy management system is further configured to perform a first protection operation based on the first-level alarm, or perform a second protection operation based on the second-level alarm, or perform a third protection operation based on the third-level alarm; the first protection operation includes: an audible and visual alarm; the second protection operation includes: adjusting the AC-side power of the energy storage outdoor cabinet; the third protection operation includes: powering off the system of the energy storage outdoor cabinet.

[0016] In some embodiments, the energy storage outdoor cabinet further includes: an air switch, which is serially arranged in the positive busbar and the negative busbar.

[0017] In a third aspect, the present application provides a monitoring method, which is applied to the energy storage outdoor cabinet provided in the second aspect above, and includes: monitoring the status of the maintenance switch of the energy storage outdoor cabinet; monitoring the status of the cabin door of the energy storage outdoor cabinet; and generating a warning signal in response to the maintenance switch status being open and the cabin door status being open.

[0018] In some embodiments, the energy storage outdoor cabinet includes a battery compartment and an electrical compartment; the monitoring of the status of the maintenance switch of the energy storage outdoor cabinet includes: monitoring the status of the maintenance switches of the battery compartment and the electrical compartment; the monitoring of the status of the cabin door of the energy storage outdoor cabinet includes: monitoring the status of the cabin doors of the battery compartment and the electrical compartment; generating a first warning signal in response to the maintenance switch status of the battery compartment being open and the cabin door status being open; generating a second warning signal in response to the maintenance switch status of the electrical compartment being open and the cabin door status being open; and generating a third warning signal in response to the maintenance switch statuses of the battery compartment and the electrical compartment being open and the cabin door status being open.

[0019] In some embodiments, after generating the warning signal, it further includes: performing a protection operation in response to the warning signal.

[0020] The monitoring circuit provided by the present application designs a monitoring logic to monitor the status of the cabin door of the energy storage outdoor cabinet, and can issue a warning signal for warning when the cabin door of the energy storage outdoor cabinet is opened or not closed during operation, thereby avoiding electrical safety accidents or system failures and improving the safety and reliability of the energy storage outdoor cabinet. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings below are 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.

[0022] Figure 1 It is a schematic diagram of the module structure of the monitoring circuit provided by the embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of the specific structure of the monitoring circuit provided by the embodiment of the present application;

[0024] Figure 3 It is a schematic diagram of the structure of the maintenance circuit provided by the embodiment of the present application;

[0025] Figure 4 It is a schematic structural diagram of the monitoring circuit corresponding to the energy storage outdoor cabinet provided by the embodiment of the present application;

[0026] Figure 5 It is a schematic structural diagram of the maintenance relay corresponding to the energy storage outdoor cabinet provided by the embodiment of the present application;

[0027] Figure 6 It is a logical schematic diagram of the control logic corresponding to the monitoring method provided by the embodiment of the present application. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0029] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0030] In the present application, the term "exemplary" is used to mean "serving as an example, illustration, or description". Any embodiment described as "exemplary" in the present application is not necessarily to be construed as more preferred or more advantageous than other embodiments. In order to enable any person skilled in the art to implement and use the present application, the following description is given. In the following description, details are set forth for the purpose of explanation. It should be understood that those skilled in the art can recognize that the present application can be implemented without these specific details. In other instances, well-known structures and processes are not described in detail to avoid unnecessary details from obscuring the description of the present application. Therefore, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the present application.

[0031] Meanwhile, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0032] Similarly, it should be noted that, in order to simplify the presentation of this application disclosure and thus help the understanding of one or more embodiments, in the foregoing description of the embodiments of this application, sometimes multiple features are grouped into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the single embodiments disclosed above.

[0033] In some embodiments, numbers are used to describe components and attribute quantities. It should be understood that such numbers used for the description of embodiments are, in some examples, modified by the modifiers "about", "approximately", or "substantially". Unless otherwise stated, "about", "approximately", or "substantially" indicate that the numbers allow a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and such approximate values can change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining the general number of digits. Although the numerical ranges and parameters used in some embodiments of this application to confirm the breadth of their ranges are approximate values, in specific embodiments, such numerical settings are as precise as possible within the feasible range.

[0034] For each patent, patent application, patent application publication, and other materials cited in this application, such as articles, books, specifications, publications, documents, etc., their entire contents are hereby incorporated into this application as references, except for the application history documents that are inconsistent with or conflict with the content of this application, and also except for the documents that limit the broadest scope of the claims of this application (currently or subsequently attached to this application). It should be noted that if there are inconsistencies or conflicts between the descriptions, definitions, and / or uses of terms in the attached materials of this application and the example content of this application, the descriptions, definitions, and / or uses of terms in this application shall prevail.

[0035] Based on the background art, it is known that the application scenarios of energy storage outdoor cabinets are basically in outdoor environments, and the industry has not monitored and controlled the status of the outdoor cabinet hatch. This may lead to safety accidents when non-maintenance personnel open the outdoor cabinet hatch, or the energy storage system may malfunction due to rain, sand, and wind eroding electrical components because the maintenance personnel forget to close the outdoor cabinet hatch.

[0036] An embodiment of the present application provides a monitoring circuit, which aims to monitor the status of the hatch of an energy storage outdoor cabinet. The monitoring circuit provided in this embodiment will be described in detail below with reference to the accompanying drawings, specifically as follows:

[0037] Refer to Figure 1 , Figure 1 which is a schematic diagram of the module structure of the monitoring circuit provided in this embodiment. The monitoring circuit 100 is applied to an energy storage outdoor cabinet. The monitoring circuit 100 includes: a positive busbar 101, a negative busbar 102, a hatch monitoring module 110, an early warning driving module 120, and a maintenance monitoring module 130.

[0038] Among them, the hatch monitoring module 110 is serially arranged in either the positive busbar 101 or the negative busbar 102. The hatch monitoring module 110 is configured to monitor the status of the hatch of the energy storage outdoor cabinet and conduct when the hatch status is open. The early warning driving module 120 is connected to the positive busbar 101 and the negative busbar 102. The early warning driving module 120 is configured to issue an early warning signal based on the current flowing through the early warning driving module 120. The maintenance monitoring module 130 is connected in parallel with the early warning driving module 120. The maintenance monitoring module 130 is configured to monitor the status of the maintenance switch of the energy storage outdoor cabinet and short-circuit the early warning driving module 120 when the maintenance switch status is closed.

[0039] Refer to Figure 1 , for the hatch monitoring module 110, the hatch monitoring module 110 is serially connected to the negative busbar 102. When the hatch monitoring module 110 monitors that the hatch status of the energy storage outdoor cabinet is open, the hatch monitoring module 110 conducts, that is, the negative busbar 102 conducts, and the monitoring circuit 100 is powered on. When the hatch monitoring module 110 monitors that the hatch status of the energy storage outdoor cabinet is closed, the hatch monitoring module 110 is turned off. At this time, the negative busbar 102 is disconnected, and the monitoring circuit 100 stops working due to power-off.

[0040] Among them, the positive busbar 101 and the negative busbar 102 are power grid transmission lines. The positive busbar 101 is the live wire L, and the negative busbar 102 is the neutral wire N.

[0041] It should be noted that in Figure 1In the example, the fact that the hatch monitoring module 110 is serially arranged in the negative busbar 102 does not limit this embodiment; in other embodiments, the hatch monitoring module 110 may be serially arranged in the positive busbar 101, or the hatch monitoring module 110 may be serially arranged in both the positive busbar 101 and the negative busbar 102 simultaneously.

[0042] Continuing to refer to Figure 1 , for the warning driving module 120, when the hatch monitoring module 110 is turned on, the positive busbar 101 and the negative busbar 102 are loaded across both ends of the warning driving module 120. The positive busbar 101 and the negative busbar 102 form a loop based on the warning driving module 120, and current flows through the warning driving module 120, and the warning driving module 120 emits a warning signal.

[0043] For the maintenance monitoring module 130, when it is detected that the maintenance switch is in the closed state, the maintenance monitoring module 130 is turned on. At this time, the current between the positive busbar 101 and the negative busbar 102 flows through the maintenance monitoring module 130, and the warning driving module 120 is short-circuited, thereby stopping the warning. When it is detected that the maintenance switch is in the open state, the maintenance monitoring module 130 is turned off. At this time, the current between the positive busbar 101 and the negative busbar 102 still flows through the warning driving module 120, and the warning driving module 120 continuously provides a warning signal.

[0044] In this application, the maintenance monitoring module 130 is configured to monitor the state of the maintenance switch of the energy storage outdoor cabinet and when the state of the maintenance switch is closed, at this time the hatch monitoring module 110 is configured to be turned on in response to the hatch state being open, that is, the hatch monitoring module 110 is in the turned-on state, which means the travel switch mentioned in this application is in the closed state. Since the maintenance monitoring module 130 and the warning driving module 120 are connected in parallel in the loop, the maintenance monitoring module 130 can be understood as a switch, and the warning driving module 120 can be understood as a load, such as the coil mentioned in this application, and further it will cause the warning driving module 120 to be in a short-circuit state.

[0045] It can be understood that when the energy storage outdoor cabinet needs to be repaired, the maintenance switch can be closed first, and then the hatch can be opened. At this time, the hatch monitoring module 110 is in the turned-on state, that is, the travel switch is in the closed state. Since the maintenance monitoring module 130 and the warning driving module 120 are connected in parallel, and the warning driving module 120 is used as a load while the maintenance monitoring module 130 is used as a non-load, further it will cause the warning driving module 120 to be in a short-circuit state, so that the warning driving module 120 will not provide a warning signal, and at the same time the maintenance personnel can perform maintenance normally.

[0046] The monitoring circuit 100 provided in this embodiment designs a monitoring logic to monitor the door state of the energy storage outdoor cabinet. When the door of the energy storage outdoor cabinet is opened or not closed during operation, a warning signal can be issued for warning, thereby avoiding electrical safety accidents or system failures and improving the safety and reliability of the energy storage outdoor cabinet.

[0047] Reference Figure 2 , Figure 2 FIG. is a schematic structural diagram of the monitoring circuit provided in this embodiment. In some embodiments, the door monitoring module 110 includes a detection switch S1. The detection switch S1 is serially disposed in any one of the positive bus 101 and the negative bus 102. The detection switch S1 is configured to adjust the switch state based on the state of the energy storage outdoor cabinet.

[0048] Specifically, when the state of the energy storage outdoor cabinet is open, the detection switch S1 is adjusted to the closed state; when the state of the energy storage outdoor cabinet is closed, the detection switch S1 is adjusted to the open state.

[0049] It should be noted that in the Figure 2 example, the series arrangement of the detection switch S1 in the negative bus 102 does not constitute a limitation to this embodiment; in other embodiments, the detection switch S1 can be serially disposed in the positive bus 101, or the detection switch S1 can be serially disposed in both the positive bus 101 and the negative bus 102 at the same time.

[0050] In some embodiments, the detection switch S1 includes a travel switch.

[0051] Specifically, the detection switch S1 is set based on the travel switch. The travel switch is configured to be stressed when the door of the energy storage outdoor cabinet is closed and not stressed when the door is open; the contact is in the normally closed state when the travel switch is not stressed. By using the travel switch as the detection switch, the monitoring logic of the door monitoring module 110 is realized in a mechanical structure coupling manner, avoiding the introduction of electrical signals to prevent electromagnetic interference from disturbing the control of the door monitoring module 110, and further improving the safety and reliability of the energy storage outdoor cabinet.

[0052] Reference Figure 2 and Figure 3 , Figure 3 FIG. is a schematic structural diagram of the maintenance circuit provided in this embodiment. In some embodiments, the maintenance monitoring module 130 includes a low-voltage power supply E, a control unit 201, and a maintenance switch S3.

[0053] Among them, the low-voltage power supply E, the control unit 201, and the maintenance switch S3 are connected in series to form a maintenance circuit; the control unit 201 is also connected to the positive bus 101 and the negative bus 102. The control unit 201 is configured to electrically connect the positive bus 101 and the negative bus 102 in response to the conduction of the maintenance circuit to short-circuit the warning drive module 120.

[0054] Specifically, the positive pole of the low-voltage power supply E is connected to the first end of the control unit 201, the second end of the control unit 201 is connected to the first end of the maintenance switch S3, and the second end of the maintenance switch S3 is connected to the negative pole of the low-voltage power supply E. When the maintenance switch S3 is disconnected, the maintenance loop is disconnected; when the maintenance switch S3 is closed, the maintenance loop is conducted, and the control unit 201 controls the positive busbar 101 to be connected to the negative busbar 102. At this time, the current between the positive busbar 101 and the negative busbar 102 flows through the maintenance monitoring module 130, thereby short-circuiting the warning driving module 120. By arranging the maintenance switch S3 in the maintenance loop, the high-voltage loop and the located loop are isolated, ensuring the safety of manually operating the maintenance switch.

[0055] For the low-voltage power supply E, the voltage value of the low-voltage power supply E is the human body safety voltage to improve the safety of manually operating the maintenance switch S3. In one example, the voltage value of the low-voltage power supply E is 24V.

[0056] In some embodiments, the control unit 201 includes a maintenance relay. The control end of the maintenance relay is connected to the low-voltage power supply E and the maintenance switch S3, and the switch end of the maintenance relay is connected to the positive busbar 101 and the negative busbar 102.

[0057] Specifically, the maintenance relay includes a core coil L2 and an armature switch S2. Among them, the core coil L2, as the control end of the maintenance relay, is connected to the low-voltage power supply E and the maintenance switch S3, and the armature switch S2, as the switch end of the maintenance relay, is connected to the positive busbar 101 and the negative busbar 102. When the maintenance switch S3 is closed, the core coil L2 is energized to adsorb the armature switch S2 to close. After the armature switch S2 is closed, the maintenance monitoring module 130 is conducted, and the warning driving module 120 is short-circuited; when the maintenance switch S3 is disconnected, the core coil L2 is not energized, the armature switch S2 is disconnected, the maintenance monitoring module 130 is turned off, and the warning driving module 120 works.

[0058] Continue to refer to Figure 2 In some embodiments, the warning driving module 120 is arranged based on the coil L1, and the coil L1 is coupled to the energy management system (EMS) corresponding to the energy storage outdoor cabinet.

[0059] Specifically, the coil L1 is coupled to the energy relationship system, and when the warning signal sent by the warning driving module 120 is transmitted, the energy management system can perform protection operations on the energy storage outdoor cabinet.

[0060] In one example, the protection operations performed by the energy management system on the outdoor energy storage cabinet may include audible and visual alarms, adjusting the AC-side power of the outdoor energy storage cabinet, or powering off the system of the outdoor energy storage cabinet. In some embodiments, the energy management system also displays its status in real time on the EMS cloud platform, which can timely alert the on-duty personnel in the control center so that they can handle problems in the shortest possible time.

[0061] In some embodiments, the monitoring circuit 100 further includes a lighting component 140, which is disposed in the outdoor energy storage cabinet and is connected in series to any one of the positive bus 101 and the negative bus 102.

[0062] Specifically, based on the foregoing, when the hatch of the outdoor energy storage cabinet is opened, the hatch monitoring module 110 is turned on. At this time, the monitoring circuit 100 is turned on, and the lighting component 140 operates to provide lighting for the corresponding staff.

[0063] In some embodiments, the monitoring circuit 100 further includes an air switch 103, which is connected in series between the positive bus 101 and the negative bus 102. The air switch 103 is used to automatically trip when the circuit 100 is severely overloaded to protect the circuit.

[0064] In summary, the monitoring circuit provided in this embodiment designs a monitoring logic to monitor the hatch status of the outdoor energy storage cabinet, and can issue a warning signal for warning when the hatch of the outdoor energy storage cabinet is opened or not closed during operation, thereby avoiding electrical safety accidents or system failures and improving the safety and reliability of the outdoor energy storage cabinet.

[0065] It should be noted that, without conflict, the features claimed in the monitoring circuit 100 provided in the above embodiments can be randomly combined to obtain a new embodiment of the monitoring circuit 100.

[0066] Another embodiment of the present application provides an outdoor energy storage cabinet, which includes a hatch status monitoring function.

[0067] In some embodiments, the outdoor energy storage cabinet includes the monitoring circuit 100 provided in the above embodiments, and an energy management system communicatively connected to the monitoring circuit 100.

[0068] Reference Figure 4 , Figure 4 is the specific structural schematic diagram of the monitoring circuit corresponding to the outdoor energy storage cabinet provided in this embodiment.

[0069] In some embodiments, the energy storage outdoor cabinet includes a battery compartment 301 and an electrical compartment 302. A first monitoring circuit is disposed inside the battery compartment 301, and the first monitoring circuit includes the monitoring circuit provided in the above embodiments. A second monitoring circuit is disposed inside the electrical compartment 302, and the second monitoring circuit includes the monitoring circuit provided in the above embodiments. Among them, the positive busbars of the first monitoring circuit and the second monitoring circuit are connected in parallel, and the negative busbars of the first monitoring circuit and the second monitoring circuit are connected in parallel.

[0070] It should be noted that Figure 4 The example with one battery compartment 301 and one electrical compartment 302 does not limit this embodiment. In specific applications, the energy storage outdoor cabinet may include not only the battery compartment 301 and the electrical compartment 302, but also other types of compartments. In addition, there may be more than one door for the battery compartment 301 and the electrical compartment 302 in the energy storage outdoor cabinet. In this case, corresponding parallel monitoring circuits can be set for the corresponding compartments.

[0071] In some embodiments, the energy management system is configured to issue a first-level alarm in response to the first warning signal sent by the first monitoring circuit, or issue a second-level alarm in response to the second warning signal sent by the second monitoring circuit, or issue a third-level alarm in response to the first warning signal and the second warning signal. Among them, the alarm levels of the first-level alarm, the second-level alarm, and the third-level alarm increase in sequence.

[0072] Specifically, when the door of the energy storage outdoor cabinet is opened or not closed, if the maintenance button is not pressed at this time, the monitoring circuit 100 will recognize that it is not in the maintenance state at this time and classify the alarm into a first-level alarm, a second-level alarm, and a third-level alarm according to the severity. When the door of the battery compartment 301 is opened or not closed, the contact of the coil L1-1 will output a first warning signal to the energy management system. Since the protection level of electrical equipment such as battery packs in the battery compartment 301 is relatively high and the risk of electrical accidents is relatively low, it is defined as a first-level alarm, which is also the alarm with the lowest risk level. When the door of the electrical compartment 302 is opened or not closed, the contact of the coil L1-2 will output a second warning signal to the energy management system. Since there are very important electrical equipment such as high-voltage boxes, energy storage inverters, and circuit breakers in the electrical compartment 302, and the protection levels of these electrical equipment do not all reach the high protection level of the battery pack, non-professional personnel may have an electric shock accident if they accidentally touch the live parts of these devices. Therefore, it is defined as a second-level alarm, which is also the alarm with a moderate risk level. When the doors of both the battery compartment 301 and the electrical compartment 302 are opened or not closed, the contact of the coil L1-1 will output a first warning signal to the energy management system and the contact of the coil L1-2 will output a second warning signal to the energy management system. The risk of electrical construction is the highest, so it is arbitrarily defined as a third-level alarm, which is also the alarm with the highest risk level.

[0073] For the energy storage outdoor cabinet provided in this embodiment, the control strategy corresponding to the monitoring circuit divides the alarm signal of the energy relationship system into three levels and issues different instructions according to their severity. The entire system will not be powered off immediately because the hatch of the electrical compartment or the battery compartment is opened. The three-level alarm gives the system a buffer process so that the control strategy can be adjusted more flexibly.

[0074] In some embodiments, the energy relationship system is also configured to perform a first protection operation based on a first-level alarm, or a second protection operation based on a second-level alarm, or a third protection operation based on a third-level alarm; wherein the first protection operation includes an audible and visual alarm; the second protection operation includes: adjusting the AC side power of the outdoor energy storage cabinet; the third protection operation includes: cutting off power to the system of the outdoor energy storage cabinet.

[0075] Specifically, when a level one alarm occurs, since the danger level is the lightest, the energy management system will issue a command to the sound and light alarm, and the sound and light alarm will send a strong sound and light signal to remind the personnel on site; when a level two alarm occurs, since the danger level increases, the energy management system will issue a command to the sound and light alarm, and the sound and light alarm will send a strong sound and light signal to remind the personnel on site. In addition, the energy management system will also issue a command to reduce the AC side power of the energy storage outdoor cabinet through software to reduce the risk of electric shock for non-professionals; when a level three alarm occurs, since the position line level is the heaviest, the energy management system will not only activate the sound and light alarm, but also cut off the AC side circuit breaker, the DC side isolation switch and relay in turn, thereby cutting off the power to the entire energy storage system to ensure the safety of on-site personnel.

[0076] In some embodiments, the three alarms will not only alert on-site personnel through sound and light alarms, but will also display their status in real time on the cloud platform corresponding to the energy management system, which can promptly remind the on-duty personnel in the control center so that they can deal with the problem in the shortest time.

[0077] For the energy storage outdoor cabinet provided in this embodiment, when the real maintenance personnel need to open the door of the energy storage outdoor cabinet for inspection and maintenance, they only need to press the maintenance button. At this time, the energy management system will not receive the signal that the door of the energy storage outdoor cabinet is opened, so it will not issue an alarm or a corresponding instruction. When the maintenance personnel have completed the inspection and maintenance, they can close the door of the energy storage outdoor cabinet and reset the maintenance button. If the maintenance personnel forget to press the maintenance button before opening the door and cause an alarm, they only need to press the maintenance button to cancel the alarm, which improves the fault tolerance of the operation.

[0078] refer to Figure 5 , Figure 5Schematic diagram of the structure of the maintenance relay corresponding to the energy storage outdoor cabinet provided in this embodiment. In some embodiments, the maintenance monitoring module in the monitoring circuits corresponding to the battery compartment 301 and the electrical compartment 302 can be set based on the same maintenance relay.

[0079] Specifically, the maintenance relay includes a cell coil L2, a first armature switch S2-1, and a second armature switch S2-2. Among them, the first armature switch S2-1 is located in the battery compartment 301, and the second armature switch S2-2 is located in the electrical compartment S2-2. The terminals 7 and 8 of the cell coil L2 are used as the control terminals of the maintenance relay and are connected to the low-voltage power supply E and the maintenance switch S3 (refer to Figure 3 ). The first armature switch S2-1 and the second armature switch S2-2 are used as the switch terminals of the maintenance relay. The normally open terminal 1 of the first armature switch S2-1 is suspended, and the normally open terminal 2 of the second armature switch S2-2 is suspended; the normally closed terminal 3 of the first armature switch S2-1 is connected to the negative bus bar located in the battery compartment 301, and the normally closed terminal 4 of the second armature switch S2-2 is connected to the negative bus bar located in the electrical compartment 302; the control terminal 5 of the first armature switch S2-1 is connected to the normally open terminal 1 or the normally closed terminal 3 based on the control of the cell coil L2; the control terminal 6 of the second armature switch S2-2 is connected to the normally open terminal 2 or the normally closed terminal 4 based on the control of the cell coil L2.

[0080] Combined with Figure 3 and Figure 4 , when the maintenance switch S3 is closed, the cell coil L2 is energized to attract and close the first armature switch S2-1 and the second armature switch S2-2. After the first armature switch S2-1 and the second armature switch S2-2 are closed, the maintenance monitoring module 130 is turned on, and the warning driving module 120 is short-circuited; when the maintenance switch S3 is opened, the cell coil L2 is not energized, the first armature switch S2-1 and the second armature switch S2-2 are opened, the maintenance monitoring module 130 is turned off, and the warning driving module 120 works.

[0081] In some embodiments, the energy storage outdoor cabinet further includes an air switch 103. The air switch 103 is serially arranged in the positive bus bar 101 and the negative bus bar 102. The air switch 103 is used to automatically trip when the circuit 100 is severely overloaded to protect the circuit.

[0082] For the monitoring circuit and the energy storage outdoor cabinet provided in this embodiment, the cost of the monitoring circuit is very low and it is easy to implement. Moreover, the monitoring circuit is also serially connected with the lighting lamps in the battery compartment and the electrical compartment, and the lamps will light up when the cabin door is opened, which is convenient for maintenance personnel to check and repair.

[0083] In addition, when the cabin door of the energy storage outdoor cabinet is opened or not closed, personnel both on-site and in the off-site control center can receive warning signals, achieving double protection.

[0084] It should be noted that, without conflict, the features claimed in the energy storage outdoor cabinet provided in the above embodiments can be randomly combined to obtain new embodiments of the energy storage outdoor cabinet.

[0085] Another embodiment of the present application provides a monitoring method, which is applied to the energy storage outdoor cabinet provided in the above embodiment, and includes: monitoring the state of the maintenance switch of the energy storage outdoor cabinet; monitoring the state of the cabin door of the energy storage outdoor cabinet; generating a warning signal in response to the maintenance switch state being on and the cabin door state being open.

[0086] Designing a monitoring logic to monitor the state of the cabin door of the energy storage outdoor cabinet can send a warning signal for warning when the cabin door of the energy storage outdoor cabinet is opened or not closed during operation, thereby avoiding electrical safety accidents or system failures and improving the safety and reliability of the energy storage outdoor cabinet.

[0087] Refer to Figure 6 , Figure 6 which is a schematic diagram of the control logic corresponding to the monitoring method provided in this embodiment.

[0088] Specifically, when the maintenance button is pressed, it indicates that the energy storage outdoor cabinet is in a maintenance state at this time. The maintenance monitoring module in the monitoring circuit shorts the warning driving module, and the energy management system cannot receive the warning signal. At this time, no alarm will be triggered regardless of whether the cabin door is open or not; when the maintenance switch is not pressed, it indicates that the energy storage outdoor cabinet is not in a maintenance state at this time. The warning driving module in the monitoring circuit works normally, and the energy management system can receive the warning signal. At this time, when the cabin door is opened, the energy management system alarms.

[0089] In some embodiments, the energy storage outdoor cabinet includes a battery compartment and an electrical compartment; monitoring the state of the maintenance switch of the energy storage outdoor cabinet includes: monitoring the state of the maintenance switches of the battery compartment and the electrical compartment; monitoring the state of the cabin door of the energy storage outdoor cabinet includes: monitoring the state of the cabin doors of the battery compartment and the electrical compartment; generating a first warning signal in response to the maintenance switch state of the battery compartment being on and the cabin door state being open; generating a second warning signal in response to the maintenance switch state of the electrical compartment being on and the cabin door state being open; generating a third warning signal in response to the maintenance switch states of the battery compartment and the electrical compartment being on and the cabin door state being open.

[0090] Specifically, when the cabin door of the energy storage outdoor cabinet is opened or not closed, if the maintenance button is not pressed at this time, the monitoring circuit will recognize that it is not in the maintenance state at this time and classify the alarms into first-level alarms, second-level alarms, and third-level alarms according to the severity. When the cabin door of the battery compartment is opened or not closed, a first warning signal is output to the energy management system. Since the protection level of electrical equipment such as battery packs in the battery compartment is relatively high and the risk of electrical accidents is relatively low, it is defined as a first-level alarm, which is also the alarm with the lowest level of danger. When the cabin door of the electrical compartment is opened or not closed, a second warning signal is output to the energy management system. Since there are very important electrical equipment such as high-voltage boxes, energy storage inverters, and circuit breakers in the electrical compartment, and the protection levels of these electrical equipment do not all reach the high protection level of the battery pack, non-professional personnel may have an electric shock accident if they accidentally touch the live parts of these devices. Therefore, it is defined as a second-level alarm, which is also an alarm with a moderate level of danger. When the cabin doors of both the battery compartment and the electrical compartment are opened or not closed, a first warning signal and a second warning signal (i.e., a third warning signal) are output to the energy management system. The risk of electrical construction is the highest, so it is arbitrarily defined as a third-level alarm, which is also the alarm with the highest level of danger.

[0091] For the energy storage outdoor cabinet provided in this embodiment, the control strategy corresponding to the monitoring circuit classifies the alarm signals of the energy relationship system into three levels and issues different instructions according to their severity, and does not immediately power down the entire system just because the cabin door of the electrical compartment or the cabin door of the battery compartment is opened. The third-level alarm gives the system a buffering process to more flexibly adjust the control strategy.

[0092] In some embodiments, after generating the warning signal, it further includes: performing a protection operation in response to the warning signal.

[0093] In some embodiments, the protection operation is set based on the classification of the warning signal.

[0094] In an example, the first warning signal corresponds to the first protection operation, the second warning signal corresponds to the second protection operation, and the third warning signal corresponds to the third protection operation.

[0095] Specifically, when a level one alarm occurs, since the danger level is the lightest, the energy management system will issue a command to the sound and light alarm, and the sound and light alarm will send a strong sound and light signal to remind the personnel on site; when a level two alarm occurs, since the danger level increases, the energy management system will issue a command to the sound and light alarm, and the sound and light alarm will send a strong sound and light signal to remind the personnel on site. In addition, the energy management system will also issue a command to reduce the AC side power of the energy storage outdoor cabinet through software to reduce the risk of electric shock for non-professionals; when a level three alarm occurs, since the position line level is the heaviest, the energy management system will not only activate the sound and light alarm, but also cut off the AC side circuit breaker, the DC side isolation switch and relay in turn, thereby cutting off the power to the entire energy storage system to ensure the safety of on-site personnel.

[0096] In some embodiments, the three alarms will not only alert on-site personnel through sound and light alarms, but will also display their status in real time on the cloud platform corresponding to the energy management system, which can promptly remind the on-duty personnel in the control center so that they can deal with the problem in the shortest time.

[0097] For the monitoring method provided in this embodiment, when the real maintenance personnel need to open the hatch door of the energy storage outdoor cabinet for inspection and maintenance, they only need to press the maintenance button. At this time, the energy management system will not receive the signal that the hatch door of the energy storage outdoor cabinet is opened, and thus will not issue an alarm or a corresponding instruction. When the maintenance personnel have completed the inspection and maintenance, they can close the hatch door of the energy storage outdoor cabinet and reset the maintenance button. If the maintenance personnel forget to press the maintenance button before opening the hatch door and cause an alarm, they only need to press the maintenance button to cancel the alarm, which improves the fault tolerance of the operation.

[0098] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0099] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0100] The above has introduced in detail a monitoring circuit, an energy storage outdoor cabinet and a monitoring method provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A monitoring circuit, applied to an outdoor energy storage cabinet, characterized in that Comprising: A positive bus bar and a negative bus bar; A hatch monitoring module, serially arranged in any one of the positive bus bar and the negative bus bar, configured to monitor the hatch state of the outdoor energy storage cabinet and conduct when the hatch state is open; An early warning driving module, connected to the positive bus bar and the negative bus bar, configured to issue an early warning signal based on the current flowing through the early warning driving module; A maintenance monitoring module, connected in parallel with the early warning driving module, configured to monitor the state of the maintenance switch of the outdoor energy storage cabinet and short-circuit the early warning driving module when the maintenance switch state is closed.

2. The monitoring circuit according to claim 1, wherein The hatch monitoring module includes: a detection switch, the detection switch is serially arranged in any one of the positive bus bar and the negative bus bar, and the detection switch is configured to adjust the switch state based on the hatch state of the outdoor energy storage cabinet.

3. The monitoring circuit according to claim 2, wherein The detection switch includes a travel switch.

4. The monitoring circuit according to claim 1, wherein The maintenance monitoring module includes: A low-voltage power supply, a control unit, and a maintenance switch; The low-voltage power supply, the control unit, and the maintenance switch are serially connected to form a maintenance circuit; The control unit is also connected to the positive bus bar and the negative bus bar, and is configured to electrically connect the positive bus bar and the negative bus bar in response to the conduction of the maintenance circuit to short-circuit the early warning driving module.

5. The monitoring circuit according to claim 4, wherein The control unit includes a maintenance relay, the control end of the maintenance relay is connected to the low-voltage power supply and the maintenance switch, and the switch end of the maintenance relay is connected to the positive bus bar and the negative bus bar.

6. The monitoring circuit according to any one of claims 1 to 5, characterized in that The early warning driving module is based on a coil, and the coil is coupled to the corresponding energy management system of the outdoor energy storage cabinet.

7. The monitoring circuit according to any one of claims 1 to 5, characterized in that Further comprising: A lighting component, arranged in the outdoor energy storage cabinet and serially connected in any one of the positive bus bar and the negative bus bar.

8. An outdoor energy storage cabinet, characterized in that, Comprising: The monitoring circuit according to any one of claims 1 to 7, and an energy management system communicatively connected to the monitoring circuit.

9. The energy storage outdoor cabinet according to claim 8, wherein Comprising: A battery compartment, internally provided with a first monitoring circuit, the first monitoring circuit including the monitoring circuit according to any one of claims 1 to 7 above; An electrical compartment, internally provided with a second monitoring circuit, the second monitoring circuit including the monitoring circuit according to any one of claims 1 to 7 above; The positive bus bars of the first monitoring circuit and the second monitoring circuit are arranged in parallel, and the negative bus bars of the first monitoring circuit and the second monitoring circuit are arranged in parallel.

10. The energy storage outdoor cabinet according to claim 9, characterized in that, The energy management system is configured to perform a first-level alarm in response to a first early warning signal issued by the first monitoring circuit, or perform a second-level alarm in response to a second early warning signal issued by the second monitoring circuit, or perform a third-level alarm in response to the first early warning signal and the second early warning signal; Wherein, the alarm levels of the first-level alarm, the second-level alarm, and the third-level alarm increase in sequence.

11. The energy storage outdoor cabinet according to claim 10, characterized in that, The energy management system is further configured to perform a first protection operation based on the first-level alarm, or perform a second protection operation based on the second-level alarm, or perform a third protection operation based on the third-level alarm; The first protection operation includes: audible and visual alarm; The second protection operation includes: adjusting the AC-side power of the outdoor energy storage cabinet; The third protection operation includes: powering off the system of the outdoor energy storage cabinet.

12. The energy storage outdoor cabinet according to claim 9, wherein, It further includes: An air switch, which is serially arranged in the positive busbar and the negative busbar.

13. A monitoring method, applied to the energy storage outdoor cabinet according to any one of claims 8 to 12, characterized in that, It includes: Monitoring the status of the maintenance switch of the outdoor energy storage cabinet; Monitoring the status of the cabin door of the outdoor energy storage cabinet; Generating a warning signal in response to the maintenance switch status being on and the cabin door status being open.

14. The monitoring method according to claim 13, characterized in that, The outdoor energy storage cabinet includes a battery compartment and an electrical compartment; The monitoring of the status of the maintenance switch of the outdoor energy storage cabinet includes: monitoring the status of the maintenance switches of the battery compartment and the electrical compartment; The monitoring of the status of the cabin door of the outdoor energy storage cabinet includes: monitoring the status of the cabin doors of the battery compartment and the electrical compartment; Generating a first warning signal in response to the maintenance switch status of the battery compartment being on and the cabin door status being open; Generating a second warning signal in response to the maintenance switch status of the electrical compartment being on and the cabin door status being open; Generating a third warning signal in response to the maintenance switch statuses of the battery compartment and the electrical compartment being on and the cabin door status being open.

15. The monitoring method according to claim 13, characterized in that, After generating the warning signal, it further includes: performing a protection operation in response to the warning signal.

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